Electro-station of combined cycle with inter-cycle gasification (versions), control device for such electro-station (versions) and control procedure for such electro-station

FIELD: machine building.

SUBSTANCE: electro-station of combined cycle with inter-cyclic gasification consists of: gasificator (2) with solid fuel, air compressor (12), combustion chamber (11) for combustion of gas fuel from gasificator in mixture with compressed air from compressor, gas turbine (13), booster (21), circuit of gasified agent (A), bypass (D) of gasified agent, and multi-purpose valve (23). Bypass (D) adjoins an inlet branch of combustion chamber (11). Circuit (A) of gasified agent supply diverges from booster (21) rising pressure of gasified agent supplied to gasificator (2). Bypass (D) of gasified agent has valve (23) of control of withdrawn pressure. Value of flow or pressure of gasified agent supplied into gasificator (2) via circuit (A) of supply of gasifier agent can be controlled depending on degree of valve (23) opening. Valve (23) is located on bypass (D) of gasifier agent. There is eliminated necessity in installation of control accessories in circuit (A) of gasifier agent supply.

EFFECT: avoiding drops of pressure in circuit of gasifier agent supply, which allows essential reduction of pressure at output of booster.

18 cl, 29 dwg

 

The technical FIELD

[0001] the Present invention relates to a combined cycle power plant with integrated gasification (CCUG), in which the gas turbine to operate combustible gas produced by gasification of solid fuels, such as coal, as well as to a device and process control to the appropriate method.

The LEVEL of TECHNOLOGY

[0002] with gas turbines power plants known solution to use fossil fuels, such as coal, to obtain a combustible gas, namely CCUG (combined with the integrated gasification). In the framework of this technology milled into powder solid fuel is gasified by introducing a contact high temperature gaseous agent in the gasifier, resulting in a combustible gas. This combustible gas is then fed into the combustion chamber of a gas turbine, where he leads the turbine in rotation, and rotational energy mechanically passed into the generator, which produces electricity.

[0003] a Block diagram of a traditional CCWG process is described with reference to Fig, which is schematically shown CCUG installation with gasifier operating according to the method of gasification in the stream. In this installation, the powdered coal is mixed with air supplied to the gasifier 102 from coal hopper 101. Also in the gasifier 102 p is given soot, formed from carbon and detachable from the generated combustible gas.

[0004] In the blow gasifier 102 serves as the gasification agent is oxygen or air. There also is served by spraying the coal powder and soot, burning under ambient atmosphere about 1500-1800°C, above the melting temperature of the ash, and this results in the fuel gas. Next, the resulting combustible gas is cooled in the heat exchanger inside the gasifier 102 and release in the collector 103, which separates and collects soot, flowing combustible gas.

[0005] After the separation of soot and dust combustible gas is fed into the reactor 104, where it removes sulfur impurities such as H2S (hydrogen sulfide) or COS (carbonyl sulfide), nitrogen impurities such as NH2(ammonia), fine particles such as soot and trace impurities such as HCl (hydrogen chloride) and HCN (hydrogen cyanide).

[0006] After the removal of various impurities in the reactor 104 combustible gas is fed through fuel line 105 into the chamber 106 of combustion. In the chamber 106 of combustion of the combustible gas is burned in a mixture with air supplied from the compressor 107, resulting in the formation of the combustion products. They come from the camera 106 combustion in the gas turbine 108 (GT), bringing it into rotational motion, thanks mounted on the same axis generator 109 generates electricity.

[0007] the Exhaust g is PS, i.e. the exhaust gas turbine 108 and the combustion products flow to the steam generator-heat exchanger 111 (PTH). The latter produces steam, taking heat from the exhaust gases of the turbine 108. The heated flue gases of the steam supplied from the steam generator 111 in the steam turbine 112 (PT), bringing it into rotational motion, and mounted on the same axis generator 110 generates electricity.

[0008] the Exhaust steam turbine 112 pairs condense in the condenser 113 and returned to the VILLAGE 111. Further, the exhaust gases after the selection they have heat in the VILLAGE of 111 released into the environment through the flue 114.

Described herein steam and gas turbines installed each on its own axis, but can also be installed on the same axis.

[0009] a part of the compressed air from the compressor 107 select and compress the axial compressor 115. This air is sent to the gasifier 102. In the case of the air blast oxygen, detachable device 116 segregation of air, mixed with the supplied air, and thus in the gasifier 102 enters the air with a high oxygen content.

[0010] At the same time detachable device 116 segregation of air nitrogen supplied to the coal hopper 101, where it serves to increase the pressure or transporting the medium in the flow of pulverized coal and soot in the gasifier 102. The compressor 115 may select a portion of the air from the compressor is and 107 or take the air directly from the atmosphere. When the compressor 115 may be axial or centrifugal.

[0011] To control the flow and pressure supplied from the axial compressor 115 in the gasifier 102 of the air in the tract 117 supply the gasification agent is provided shut-off and regulating valve 118. To control the flow rate and pressure can be added to the fed to the gasifier 102 air oxygen, you can shut-off and regulating valve 120 is placed in the path of 119 oxygen from the apparatus 116 segregation of air into the gasifier 102. In addition, to control the flow rate supplied to the chamber 106 of combustion of the combustible gas is provided shut-off and regulating valve 121 in the fuel line 105.

[0012] Thus, the valves 118, 120 and 121 can cause the flow rate supplied to the chamber 106 combustion of fuel gas in accordance with variations in the load of the gas turbine 108. That is, the quantity supplied to the gasifier 102 pulverized coal govern according to the flow rate supplied to the chamber 106 of the combustion of a combustible gas, which is determined by the degree of opening of the valve 121. Opening the valves 118 and 120 to a desired value, you can set the flow rate and pressure of the gasification agent (air)required for gasification is supplied to the gasifier 102 pulverized coal and oxygen content in the mixture. If as the gasification agent is not enriched with oxygen is air, the apparatus 116 segregation of the air tract 119 oxygen supply and shut-off and regulating valve 120 is not required.

DISCLOSURE of INVENTIONS

[0013] As described above, is shown in Fig traditional CCUG-process valves and valve 118 is installed in the tract 117 supply the gasification agent in the gasifier 102 and use it to adjust the flow and pressure supplied to the gasifier 102 agent.

[0014] Therefore, there may occur such a problem that the pressure drop across the valve 118 will lead to a drop in performance of the plant. In addition, it is necessary to increase the pressure through the axial compressor 115, referring to his fall on the valve 118. Therefore it is necessary to raise the pressure of the compressor 115 and to equip such a path of air flow in the gasifier 102, which could be this pressure to bear.

[0015] as a result of this is complicated by not only designing CCUG equipment, and its operation is associated with high working pressures.

[0016] the present invention is to solve the above problems and to provide a combined cycle power plant with integrated gasification and the control device is and the way it works, characterized in that you can adjust the pressure and flow of the gasification agent, intended to feed into the gasifier, and at atomdata in the path of feeding the gasification agent may be reduced, and the performance of the plant is increased.

[0017] To solve the above problems the present invention provides the following.

First, the present invention relates to a combined cycle power plant with integrated gasification containing:

- gasifier generating a combustible gas by bringing the gaseous gasification agent in the reaction with the solid fuel;

- compressor that supplies compressed air;

a combustion chamber for burning fuel gas from the gasifier in a mixture of compressed air from the compressor;

- gas turbine driven by combustion gases flowing from the combustor;

- the compressor to increase the pressure of the gasification agent flow into the gasifier;

- path feeding the gasification agent increased pressure from the supercharger into the gasifier;

the bypass branches off from the duct feeding the gasification agent; and

the first shut-off and regulating valve, the degree of opening which regulates the flow or pressure of the exhaust to bypass the gasification agent.

[0018] In a combined cycle power plant with integrated gasification according to the present invention located in the first bypass shut-off valve allows you to adjust the flow rate or the pressure of the exhaust in baipa the gasification agent. Therefore, the degree of opening of the first shutoff valve in the bypass you can also set the flow rate or the pressure of the gasification agent fed to the gasifier. Thus, since it requires no valves in the path of feeding the gasification agent, you can avoid the pressure drop in the system, significantly reducing the outlet pressure of the compressor.

[0019] secondly, the present invention relates to a control device combined cycle power plant with integrated gasification containing:

- gasifier generating a combustible gas by entering gaseous gasification agent in the reaction with the solid fuel;

a combustion chamber for burning fuel gas from the gasifier in a mixture of compressed air from the compressor;

- gas turbine driven by combustion gases flowing from the combustor;

- the compressor to increase the pressure of the gasification agent flow into the gasifier;

- path feeding the gasification agent increased pressure from the supercharger into the gasifier;

the bypass branches off from the duct feeding the gasification agent;

the first shutoff valve in the bypass;

- second shut-off and control valve for setting the flow rate of gas fed to the compressor;

moreover, trojstvo control contains:

the first knob to set the desired flow rate fed to the gasifier, the gasification agent on the basis of required output power of the gas turbine;

the first control device to control the degree of opening of the first shut-off and control valve so that the flow rate supplied to the gasifier agent was equal to the value specified by the first Adjuster;

- the second unit to set a degree of opening of the second shut-off and control valve to the gasification agent was applied on the path towards bypass in excess of the required; and

the second control device to control the degree of opening of the second shut-off and regulating valve according to the commands of the second unit.

[0020] With this arrangement, the gasification agent is supplied from the blower in the path of the feed in a quantity slightly greater than required, which is determined on the basis of required output power of the gas turbine. Having an agent in abundance, its excess is directed to a bypass through the first shut-off and regulating valve, resulting in the gasifier enters the desired number. How to achieve the required power, at the same time reducing the pressure loss.

[0021] If the path of the fuel gas from the gasifier into the combustion chamber of a combined cycle power plant with nutritic the new gasification is equipped with a third shut-off and regulator valve, the control unit may include:

the third unit to set the flow rate supplied to the combustion of fuel gas based on the required power output of the gas turbine and environmental parameters;

the third control device to control the degree of opening of the third shut-off and control valve so that the flow rate supplied to the combustion chamber a combustible gas was equal to a specified setpoint value.

[0022] With this arrangement, in which the path of the fuel gas in the combustion chamber is equipped with a third shut-off and control valve for setting the flow rate of combustible gas, you can easily adjust the flow rate supplied to the combustion chamber a combustible gas through the third shut-off and control valve based on the required power output of the gas turbine and environmental parameters.

[0023] According to the present invention, the control device may be equipped so that the first unit has received the information required by the combustion of the combustible gas on the basis of required output power of the gas turbine and environmental parameters and set required by the gasifier, the amount of the gasification agent based on the desired amount of fuel gas.

[0024] the Amount of the required combustion chamber fuel gas get out the Dublin core from the desired output power of the gas turbine and environmental parameters, as required by the gasifier, the amount of the gasification agent set based on the desired amount of fuel gas that allows you to customize the output of fuel gas from the gasifier according to the needs of the combustion chamber. In the result, there is no need to install a valve or similar device to control the flow of combustible gas at the combustion chamber inlet.

[0025] the Above control device may further comprise a first corrector for an amendment to command the degree of opening of the second shutoff valve in the direction of increasing the volume in the blower based on the characteristics of the compressor.

[0026] the fall of the characteristics of the compressor because of wear or other reasons leads to reduced feed booster gasification agent in the path of feed of the agent. Accordingly, specified in the command for opening the second shut-off and control valve the degree or magnitude of the correct in the direction of increasing the flow rate supplied by the booster air with regard to its characteristics, which avoids the disadvantage of feeding the gasification agent and always apply a sufficient amount of agent in the path of feed of the agent.

[0027] the Above control device may further comprise a calculation unit for estimating stability n the load, moreover, it may be provided that if the calculation device rated load as a stable, effective the first corrector.

[0028] This arrangement allows you to restrict the work of the first corrector periods of stable load, reducing operational risk.

[0029] If the path of feed of solid fuel in a gasifier combined cycle power plant with integrated gasification equipped with a fourth shut-off and control valve, the control device contains

a fourth unit for the job required by the gasifier quantity of solid fuel on the basis of required output power of the gas turbine;

a fourth control device to control the degree of opening of the fourth shut-off and control valve so that the quantity fed to the gasifier for solid fuel was equal to a preset fourth unit value.

[0030] With this arrangement in the path of feed of solid fuel has a fourth shut-off and control valve for controlling the supply of solid fuel into the gasifier, and the degree of opening of the fourth shut-off and control valve is controlled based on the required output power of the gas turbine. So you can set the desired flow of solid fuel in a gasifier.

[0031] the control Device may also Supplement the sustained fashion to contain the second corrector for an amendment in the required quantity fed to the gasifier for solid fuel based on the characteristics of coal.

[0032] With this arrangement, in the required quantity fed to the gasifier for solid fuel correct, corresponding to the characteristics of the coal, which allows, even in case of changes in fuel characteristics, due to the grade of coal or similar cause, and to stabilize the amount of heat generated in the gasifier fuel gas. So you can get the desired output power of the gas turbine.

[0033] the Second corrector of the above control device makes the amendment in the required number of solid fuels on the basis of calorific value of solid fuel and load generator.

[0034] With this arrangement meets the alternator load the corrections are not only the calorific value of solid fuel, but also in the quantity required, which makes possible a more fine-grained control.

[0035] the control Device may further comprise a calculation device for evaluating the stability of the load, and may be provided that if the calculation device rated load as a stable, effective second corrector.

[0036] the Restriction of the second corrector periods of stable load reduces operational risk.

[0037] third, the present invention relates to a method of operation of the device, the management is of the combined cycle power plant with integrated gasification, contains:

- gasifier generating a combustible gas by entering gaseous gasification agent in the reaction with the solid fuel;

a combustion chamber for burning fuel gas from the gasifier in a mixture of compressed air from the compressor;

- gas turbine driven by combustion gases flowing from the combustor;

- the compressor to increase the pressure of the gasification agent flow into the gasifier;

- path feeding the gasification agent increased pressure from the supercharger into the gasifier;

the bypass branches off from the duct feeding the gasification agent;

the first shutoff valve in the bypass;

- second shut-off and control valve for setting the flow rate of gas fed to the compressor;

moreover, the mode of action of the control device of a combined cycle power plant with integrated gasification provides:

- the stage at which specify required by the gasifier, the amount of the gasification agent based on the required power output of the gas turbine;

- the stage at which the degree of opening of the first shut-off and regulating valve is controlled so that the quantity fed to the gasifier, the gasification agent was equivalent required;

- the stage at which you give the command to open a second shut-off and control valve for certain is that the degree or magnitude such that the path in the direction of the bypass was supplied to the gasification agent in a quantity beyond what is required;

- the stage at which the second shut-off and regulator valve is controlled depending on the team on opening a certain value.

[0038] Advantages of the present invention lies in the fact that you can control the pressure and flow supplied to the gasifier, the gasification agent, and thus it is possible to lower the pressure in the supply system the gasification agent, resulting in increased efficiency of the power plant.

BRIEF DESCRIPTION of DRAWINGS

[0039] Figure 1 schematically shows the General layout CCUG system according to the first variant implementation of the present invention.

Figure 2 shows the basic layout elements of the control device of a gas turbine CCUG according to the first variant implementation of the present invention.

Figure 3 shows a block diagram of the device of turbine control with 2.

Figure 4 shows the basic layout of the device management gasifier CCUG according to the first variant implementation of the present invention.

Figure 5 shows a block diagram of a control device of the gasifier with figure 4.

6 shows a graph showing the possibilities CCUG system according to the first variant implementation of the present invention in part response the project output power on command load change.

7 schematically shows the General layout CCUG system according to the second variant of implementation of the present invention.

Fig shows the basic layout of the device management gasifier CCUG according to the second variant of implementation of the present invention.

Fig.9 shows a graph reflecting the opportunities CCUG system according to the second variant of implementation of the present invention in terms of response output power on command load change.

Figure 10 schematically shows the General layout CCUG system with an oxygen blast.

11 shows a block diagram of a unit degree of opening of the inlet guide vanes (BHA) according to the first modification of the present invention.

Fig shows a graph reflecting the changes feed gasification agent in the path feeding the gasification agent if the unit degree of opening of the BHA does not include the first corrector.

Fig shows a graph reflecting the changes feed gasification agent in the path feeding the gasification agent if the unit degree of opening of the VNA is equipped with the first corrector.

Fig shows a block diagram of the layout of the unit the required quantity of coal according to the second modification.

Fig shows a graph reflecting the system's ability to track number of bania calorific value of coal in case if the unit required quantity of coal not have a second corrector.

Fig shows a graph reflecting the system's ability to track fluctuations in the calorific value of coal if the unit required quantity of coal have a second corrector.

Fig shows a block diagram of the layout of the unit the required quantity of coal according to the third modification.

Fig describes the work of the trimmer device referencing the required quantity of coal according to the third modification.

Fig shows an example layout of the settlement.

Fig shows a block diagram of the layout of the control device of the gasifier according to the fifth modification

Fig shows a block diagram of the layout CCUG system according to the sixth modification.

Fig shows a block diagram of the layout CCUG system according to the seventh modification.

Fig shows a block diagram of the layout of the first example strapping bypass the gasification agent in CCUG system according to the present invention.

Fig shows a block diagram of the layout of the second example strapping bypass the gasification agent in CCUG system according to the present invention.

Fig shows a block diagram of the layout of the third example strapping bypass the gasification agent in CCUG system according to the present invention.

Fig pok which shows a block diagram of the layout of the fourth example strapping bypass the gasification agent in CCUG system according to the present invention.

Fig shows a block diagram of the layout of the fifth example strapping bypass the gasification agent in CCUG system according to the present invention.

Fig shows a block diagram of the layout of another example of tying bypass the gasification agent in CCUG system according to the present invention.

Fig schematically shows the overall arrangement of a traditional CCUG system.

The BEST OPTION of carrying out the INVENTION

[0040] the Following describes embodiments of a combined cycle power plant with integrated gasification (KCVG) according to the present invention, and the control device and the method of its operation with reference to the accompanying drawings.

As examples of solid fuels, apply on the claimed combined cycle power plant with integrated gasification according to the present invention, can be called heavy fuels, such as coal, petroleum coke, coal coke, asphalt, bitumen, pitch, tar shale, and others, as well as waste, such as used tires, plastic waste and other. The following examples assume the use of coal as a solid fuel.

[0041] the First variant embodiment of the invention

The following describes the first version of the implementation of the present invention with reference to the accompanying drawings. Figure 1 is ematichesky shows the General layout CCUG system according to the present invention. CCUG system according to the first variant implementation of the present invention is based on the blast method with air as gasification agent.

[0042] As can be seen in figure 1, CCUG system according to this variant implementation contains the main elements of the coal bunker 1, the gasifier 2, the dust collector 3, reactor 4 for processing gas and the generator unit 5.

[0043] (a Coal bunker 1)

Coal hopper 1 contains the mill 1A mill that grinds their coal in pulverized form fractions from several microns to hundreds of microns, and the pulverized coal distributor 1b, which takes the ground at the mill 1A coal gasifier 2. This layout coal bunker 1 pulverized coal, milled in the mill 1A, served in a pulverized coal distributor 1b. There also comes transporting medium, for example nitrogen, obtained in the device 16 segregation of air. Accordingly, the pulverized coal distributor 1b with the air flow gives the gasifier 2 pulverized coal from the mill 1A and temporarily accumulated depending on the feed conveying medium.

[0044] (Gasifier)

In the gasifier 2, namely in the chamber 2A of combustion at a temperature of about 1500-1800°C, above the melting temperature of the ash serves pulverized coal from the coal bunker 1 and collected by the dust collector soot introducing them into the reaction with gasify youdim agent of the axial compressor 21. So in the chamber 2A of the combustion of pulverized coal is burned at high temperatures, releasing of fuel coal gas and liquid slag from molten coal ash.

[0045] Hot coal gas produced at high temperature in the chamber 2A of the combustion flows into the backburner 2b, located in the upper part of the chamber 2A of the combustion. In the backburner 2b also serves pulverized coal from the coal bunker 1 and soot from the dust collector 3 for further gasification emitting flammable gas, after which the combustible gas flows into the heat exchanger 2C and cooled. In the present embodiment applies the method of gasification in the thread with which the ejected liquid slag from molten ash, but instead you can also apply the methods of gasification in fluidized or fixed bed. Formed in the gasifier 2 combustible gas is fed into the collector 3.

[0046] (Collector)

The dust collector 3 is equipped with a cyclone 3a for centrifugal separation of soot from coming from the gasifier 2 combustible gas, and a device 3b for feeding collected in the cyclone 3a soot in the gasifier 2. The dust collector 3 is arranged so that the discharge cyclone 3a soot entering the device 3b filing temporarily stored there. Similarly pulverized coal dispenser 1b, device 3b for submission of soot takes the temporarily stored soot flow in the gasifier 2 as podocarpaceae environment, for example, nitrogen, detachable device 16 segregation of air. After the passage of cyclone 3a flammable gas without carbon black fed into the reactor 4. After separation of the dust in the cyclone 3a combustible gas is fed into the reactor 4 for further processing.

[0047] (Digester)

When the fuel gas from the dust collector 3 reactor 4 first converts the contained COS H2and CO2, resulting in a fuel gas containing H2S. This gas is introduced into gas-liquid contact with the cleaning solution, resulting removes impurities such as HCl or NH3and then in a gas-liquid contact with the reusable absorbent solution, which absorbs the H2S. Next, a combustible gas, free from such impurities as HCl, NH3or H2S, served in the generator unit 5 tract In the supply of combustible gas.

[0048] (Generator set)

Generator set 5 contains the camera 11 of the combustion chamber, the compressor 12, the gas turbine 13, the generators 14 and 15, the steam generator-heat exchanger (PTH) 16, a steam turbine 17, the capacitor 18 and the pipe 19. Thus, in CCUG system according to the present invention combined generating plant comprises a gas turbine 13 and the steam turbine 17. In the present embodiment, the gas turbine 13 and a steam turbine 17 are installed on two different OS is x and there are two generator 14 and 15. However, it is possible to equip the generator set from gas turbine 13 and a steam turbine 17 on the same axis and with a single generator.

[0049] With this arrangement, the generator set 5 compressed air from the compressor 12, and the combustible gas from the reactor 4 is fed into the chamber 11 of the combustion. The combustible gas is burned in the chamber 11 of the combustion, and the combustion products enter the gas turbine 13. The latter is driven by the combustion products, the rotary motion of the shaft is transmitted to the compressor 12 and the generator 14, resulting in the compressor 12 generates compressed air, and the generator 14 - electricity.

[0050] a part of the compressed air output of the compressor 12 is fed into the chamber 11 of the combustion and gas turbine 13 as a cooling medium for structures exposed to high temperatures from the combustion products, such as the inner wall and the nozzle chamber 11 of the combustion chamber, the impeller and the casing of the gas turbine 13.

[0051] the Products of the combustion torque of the gas turbine 13, expire from it and as the exhaust gases arrive in the VILLAGE 16. In the VILLAGE 16 residual heat from the gas turbine 13 gases is used for converting from the condenser 18 water into steam. Formed in the condenser 18 pairs served in the steam turbine 17, causing it to rotate. Rotational movement of the steam turbine bereeda shaft to the generator 15, which produces electricity. Spent in the steam turbine 17 pairs occurs in the condenser 18, where the pressure drops and it is condensed. The exhaust from the gas turbine 13 gases, cooled by the heat in the VILLAGE 16, released through the chimney 19 in the environment.

[0052] the Following is a description of the individual subsystems, which features CCUG system according to the present variant implementation. In other words, the following details the tract And feeding the gasification agent (air, in the case of this variant implementation) in the gasifier 2 and tract In the supply of combustible gas (fuel), purified in the reactor 4, in the combustion chamber.

[0053] In the present implementation, as seen in figure 1, atmospheric air is drawn in as the gasification agent into an axial compressor (supercharger) 21, and then under high pressure flows into the tract And feeding the gasification agent. The amount of air at this stage to regulate the degree of opening of the BHA (inlet guide vane) 27 of the second shut-off and control valve.

[0054] From the path And feeding the gasification agent at the point Y is branched off bypass D, and downstream at the point X, there is an adjunction tract With oxygen, through which the injected oxygen, detachable device 22 segregation of air. Bypass D gasification agent, from which atsushita from tract A, equipped with a valve for regulating a selected pressure, i.e. the first shut-off and control valve 23, and shut-off valve 24.

[0055] the Axial compressor 21 is driven to its shaft, separate from the shaft of the gas turbine 13 or steam turbine 17. Also can be provided by installing a compressor on the same shaft as the gas turbine 13 or steam turbine 17. In addition, it may be provided that the shut-off and regulating valve 23 also functions as a shutoff valve that eliminates the need for installation of valve 24.

[0056] the Valve for controlling the flow of fuel gas fed into the chamber 11 of combustion, i.e. the third shut-off and regulating valve 25 is installed in the path of the fuel gas supply connecting the reactor 4 with the chamber 11 of the combustion. Also a tract In the fuel gas supply equipped with shut-off valve (not shown), which determines whether to adjust the flow rate of fuel gas supplied into the chamber 11 of combustion.

[0057] As described above, in the path of feeding the gasification agent traditional layout shown in Fig, flow rate and pressure of the gasification agent fed to the gasifier 102, adjust valves and valve 118 mounted in the path of 117 supply the gasification agent. According to this variant implementation, opposite, flow rate and pressure of the gasification agents is a, fed to the gasifier 2, regulate the degree of opening of the shut-off and control valve 23 selected pressure, is installed in the bypass D gasification agent, and the degree of opening of the inlet guide vanes (BHA), valves and valve 27 at the inlet of the compressor 21. For this reason, there is no need to install a shutoff valve in the path And feeding the gasification agent, which reduces the pressure loss in the path And feeding the gasification agent on the path from the axial compressor 21 to the gasifier 2. Accordingly, it is possible to significantly reduce the outlet pressure axial compressor 21 in comparison with the conventional arrangement in which the shutoff valve is installed in the path And feeding the gasification agent (see Fig).

[0058] the Following describes the control device of the above CCUG-system and method of its operation with reference to Fig.2 - 6. It describes the management of generator set 5 with reference to figure 2 and figure 3. Figure 2 shows the basic layout elements of the control device of a gas turbine.

[0059] As can be seen in figure 2, the device 30 of the turbine control controls the degree of opening of the valve 25 adjustable flow set in the tract In the supply of combustible gas into the chamber 11 of the combustion. In the immediate vicinity of the gas turbine 13 is installed (not p the kettle temperature sensor on the impeller (DTK), measuring the temperature of the exhaust gas turbine 13. Downstream in the path of the exhaust gases is installed (not shown) temperature sensor exhaust gases (ATT), which measures the temperature in the path of exhaust gases.

[0060] For these sensors can be used, for example, a thermocouple. The testimony of the DCT and the ATT is received in the device 30 of turbine control.

[0061] Also, in the device 30 of the turbine control data concerning the capacity of the steam turbine 17 and the output power of the generator 15. Power steam turbine 17 can be calculated, for example, on the characteristics of the steam inlet of the turbine.

[0062] the Device 30 of the turbine control receives data describing operational and thermal state of the gas turbine, and generates on the basis of the input command to change the degree of opening of the valve configuration of the fuel gas fed into the chamber 11 of the combustion. As an example, data describing the above operating condition, can be called the power output of the generator 15, the power of the steam turbine 17, the rotation speed of the gas turbine 13 and a similar magnitude. As an example, data describing thermal condition is the temperature of the flue gases temperature at the impeller and other similar values.

[0063] Figure 3 shows a block diagram of the device 30, the management of the Oh.

First unit 35 of the axial load specifies the desired output power on the basis of which calculates a command MWD on power output in accordance with the rate set load (e.g., 3% per minute). The adder 36 calculates the command GT_MWD on the power output of the gas turbine net power output of the steam turbine from the MWD team. Team GT_MWD on the power output of the gas turbine is supplied to the adder 37, and the following device 50 controls the gasifier (see figure 4).

[0064] the Power of the gas turbine, calculated by subtracting the capacity of the steam turbine from the desired output power is fed to the adder 37. The latter calculates the difference by subtracting the power of the gas turbine from the team GT_MWD on the power output of the gas turbine. The magnitude of the discrepancy comes in the PI regulator 38, which produces a command LDCSO on the set of loads, such as to bring the power of the gas turbine in accordance with the command GT_MWD. Team LDCSO to set the load enters the selector 39.

[0065] In addition to the above team LDCSO on the set load, the selector 39 also receives command GVCSO at a set speed calculated by the speed of rotation of the shaft, the team EXCSO set temperature of exhaust gases and BPCSO set temperature on the impeller, calculated from the respective temperatures, and also commands the FLCSO fuel consumption, calculated from the amount of fuel. The selector 39 selects a management team with the lowest value, and transmits it as a control command CSO-unit degree of opening, i.e. the third unit 40. Unit 40 to the degree of opening of the valve has a tabular set the degree of opening of the valve 25 volume can be adjusted from the received command CSO. Unit 40 to the degree of opening of the valve calculates on the table the amount of opening of the corresponding received from the selector 39 management team CSO, and issues a command to change the degree of opening of the valve adjustable flow. When calculating the degree of opening (i.e. flow rate)corresponding to the CSO team, unit 40 uses the differential pressure valve 25 adjustable flow.

[0066] the Following describes the management gasifier 2 CCUG-system 1 with reference to figure 4 and figure 5. Figure 4 shows the basic layout of the device management gasifier 2.

[0067] As can be seen in figure 4, the valve settings of the supply of pulverized coal in the gasifier 2, i.e. the fourth shut-off and regulating valve 41 is installed in the path of feed of coal, i.e. in the path of the E-filing of solid fuel, connecting the coal bunker 1 gasifier 2. In the path of the fuel gas from the gasifier 2 into the chamber 11 of the combustion generator 5, in the immediate vicinity of the outlet of the gasifier 2, us is bowlen sensor 44 for measuring the pressure at the outlet of the gasifier 2. The sensor 44 of the pressure coming into the unit 50 controls the gasifier. As described above, the valve 23 settings selected pressure is set at tract D supply the gasification agent, and BHA-valve 27 is installed at the inlet of an axial compressor 21.

[0068] the Degree of opening of the valve 41 configuring consumption of coal, valve 23 settings selected pressure and BHA-gate 27 is controlled by, respectively, the team set the required amount of coal (solid fuel)commands set the required air quantity (fuel gas) and the commands for changing the opening degree of BHA, outgoing from the device 50 controls the gasifier.

[0069] figure 5 schematically shows the layout of the device 50 controls the gasifier. As can be seen in figure 5, the team GT_MWD on the power output of the gas turbine, given the above-described device 30 of turbine control, is fed to the input device 50 controls the gasifier. In the device 50 team GT_MWD enters the unit 51 preliminary overall command GID and the transmitter 52 amendments. Also to the input of the transmitter 52 amendments can be submitted output unit signal 51 preliminary overall command GID.

[0070] the setting device 51 teams GID calculates the provisional command GID, such to lead the work of the gasifier 2 in accordance with the load of the gas turbine 13. For example, the backside of tcic 51 teams GID has a table set commands GID from the team GT_MWD output power of the gas turbine and thus defines a tabular method pre-command GID, the corresponding received from the device 30 of the turbine control team GT_MWD on the power output of the gas turbine.

[0071] the Calculator 52 calculates an amendment to the above preliminary team GID based on, for example, from the relationship between team GT_MWD on the power output of the gas turbine and the pressure in the outlet port of the gasifier.

[0072] namely, the transmitter 52 amendments table has given the dependence of the pressure in the outlet port of the gasifier 2 from team GT_MWD on the power output of the gas turbine and defines a tabular manner, the value of the output pressure corresponding received from the device 30 of the turbine control team GT_MWD on the power output of the gas turbine, and then determines the deviation between the calculated and the actual pressure in the outlet port of the gasifier, i.e. the deviation Δ pressure, and then sends the last value in the PI controller, and later in the adder 53 to the amendment.

[0073] Pre-command GID received from the generator 51 teams GID put on the adder 53 with value received from the transmitter 52 amendments, thus obtaining the overall command GID. Overall command GID gasifier enters the unit the required quantity of coal, the fourth unit 54, a unit of the required quantities of air, i.e. the first unit 51, and in-unit degree opened the I VNA, i.e. the second unit 56.

[0074] the Knob 54 of the required quantity of coal is a function block 541-valued dependence of the required quantity of coal from the overall command GID. Functional block 541 table determines the required amount of coal that meets received overall command GID, and issues the appropriate command to set the required quantity of coal.

[0075] Unit 55 of the required quantity of air is a function block 551-valued dependence of the required quantity of air from the overall command GID. Functional block 551 table determines the required amount of air corresponding received overall command GID, and issues the appropriate command to set the required quantity of air.

[0076] the Unit 56 degree of opening of the VNA is a functional block 561-valued dependence of the required quantity of air from the overall command GID, and a functional block 562-valued dependence of the degree of opening of the BHA from the required quantity of air. Function summarizing functional sections 561 and 562 may be the same as the function block 551. Functional block 561 determines the desired amount of air that meets the overall command GID, through the above-mentioned or similar tables, and then the functional block 562 determines meet the required amount of air the degree of the offset VNA, by issuing the appropriate command to change the opening degree of the VNA.

[0077] Command to set the required quantity of coal supplied from the generator 54, is corrected variable valve 41 configuring consumption of coal, shown in figure 4, but not shown, the actuator opens the valve 41 to a certain degree on the basis of this value, the result is a set amount of coal supplied to the gasifier 2.

[0078] Command to set the required quantity of air coming from the unit 55, serves as a command for changing the degree of opening of the valve 23 settings selected pressure.

[0079] namely, calculate the difference between the command to set the required quantity of air coming from the unit 55, and the actual amount received in the gasifier 2, resulting in open valve 23 this magnitude, to resolve the discrepancy. The opening of valve 23 settings selected pressure by the specified value is not shown, actuating devices, i.e. the first actuating device. When you open this magnitude valve settings selected by the excess pressure of the compressed air coming from the axial compressor 21, flows into the chamber 11 of the combustion chamber through the valve 23, while the pressure and flow of the gasification agent, the incoming gasification 2, reaches the desired value.

[0080] the Command to change the opening degree of BHA coming from the generator 56, serves as a command for changing the opening degree of BHA-gate 27. VNA-valve 27 is opened by the specified value shown by the Executive unit, the second execution unit, in accordance with the received command to change the opening degree of BHA, causing the amount of air flowing into the axial compressor 21, reaches the desired value.

[0081] figure 5 shows the three above-mentioned knob, but, in addition, may be provided by referencing to the amount of oxygen and carbon black.

[0082] As described above, CCUG system, control device and method of its work under this variant implementation suggest that there is a bypass D gasification agent, branches off from the path And feeding the gasification agent, and the pressure and flow rate selected in the bypass agent regulating valve 23 settings selected pressure, which allows to regulate the flow and pressure of the gasification agent entering the gasifier 2. Thus, eliminating the need to install a valve adjustable flow path And supply the gasification agent, it is possible to reduce pressure loss in the path And feeding the gasification agent on the path from the axial compress the RA 21 to the gasifier 2. Therefore, compared with the traditional layout (see Fig), which involves the installation of a control valve 118 in the path And feeding the gasification agent, can significantly reduce the outlet pressure axial compressor 21.

[0083] Next, as shown in figure 1, the bypass D gasification agent is adjacent to the outlet of the compressor 12, which allows the use of the gasification agent selected bypass D, branches off from the path And feeding the gasification agent, as part of the air supplied to the cooling chamber 11 of the combustion and gas turbine 13. This allows you to lower the outlet pressure of the compressor 12 and thereby further increase the efficiency of the gas turbine 13. As a result, aggregate efficiency under this option, the exercise can be increased by a few percent compared to the traditional way. The same improvement is achieved in the other embodiments described below.

[0084] figure 6 shows a graph reflecting the ability of a generating unit CCUG system according to the present variant implementation to respond to the command load change. The horizontal axis represents time and the vertical output power, i.e. the total power of the generators 14 and 15. Curve a shows the power of a gas turbine, the curve b - power is and the steam turbine, the curve with the output power of the generator set, and curve d - command MWD on power output. As can be seen in this graph, the system can very well follow the MWD team.

[0085] the Second variant implementation

Below described second variant implementation of the invention. In CCUG system according to the above-described first embodiment of implementation (see figure 1) the valve 25 setting the supply of combustible gas into the chamber 11 of the combustion install in the path of the fuel gas supply. CCUG system according to this second variant of implementation differs from the first that the valve 25 of the discharge setting is not set, as shown in Fig.7.

[0086] that is, since CCUG system according to the present variant implementation is missing the valve 25 adjustable flow, the flow of combustible gas into the chamber 11 of the combustion configure management tools gasifier 2. Below is described the method of controlling CCUG system according to the present variant implementation.

[0087] On Fig shows the layout of the device 50-1 management gasifier according to the present variant implementation. As seen on Fig, the device 50-1 management gasifier input receives a control command from CSO device 30 of turbine control, and thus the device 50-1 contains unit 60 to set the overall command GID gasifier recognize who I am from the received command CSO, as well as the knob 54 of the required quantity of coal, unit 55 of the required air quantity and unit 56 degree of opening of the VNA, which give, respectively, the command to set the required quantity of coal, the command to set the required quantity of air and a degree of opening of the BHA based on the overall command GID gasifier received from the generator 60. Overall command GID gasifier on this layout has only one setting device 60, however, to obtain an overall command GID, you can add a signal corrections, calculated according to the pressure in the gasifier, just as it makes the transmitter 52 amendments in figure 5.

[0088] the setting device 60 team GID table has given the dependence of the overall command GID gasifier from the management team CSO, which allows tabular method to determine the overall command GID gasifier, the corresponding received from the device 30 of the turbine control of the management team CSO, then the overall command GID enters the knobs 54, 55 and 56. Thus, similar to the above first embodiment, receives the command to set the required quantity of coal, the command to set the required quantity of air and a degree of opening of the BHA based on the overall command GID gasifier, and then open the valve 41 configuring consumption of coal, the valve 23 settings selected pressure is BHA-gate 27 to the extent corresponding to these commands, resulting in a supply of coal and air into the gasifier 2, as well as air flow in an axial compressor 21 reach the required values.

[0089] As described above, CCUG system, control device and method of its work under this variant implementation suggest that the supply of coal and the gasification agent in the gasifier 2 set depending on the CSO team coming from the device 30 of turbine control. The management team CSO corresponds to a given value of the fuel gas into the chamber 11 of the combustion, therefore, controlling the gasifier based on the CSO team, you can set the output of fuel gas from the gasifier 2 that he will meet the team on the power output of the gas turbine at the appropriate time. That is, according to this variant implementation, if instead of setting fuel gas valve 25 to configure it controls the gasifier 2, the valve 25 of the configuration of the fuel gas becomes unnecessary, which simplifies the system design and allows to increase its effectiveness.

[0090] IN CCUG system according to the present variant implementation is not required, the valve 25 of the configuration of the fuel gas, and therefore can reduce the pressure loss in the duct In the fuel gas supply that, in turn, allows additional is but to reduce the outlet pressure of the compressor 12.

[0091] figure 9 shows a graph reflecting the ability of a generating unit CCUG system according to the present variant implementation to respond to the command load change. The horizontal axis represents time and the vertical output power, i.e. the total power of the generators 14 and 15. Curve a' shows the power of a gas turbine, the curve b' - power steam turbine, the curve c' is the output power of the generator set, and curve d' command MWD on power output. As can be seen in this graph, the system is able to follow the MWD team is not as good as on the chart for the first variant implementation, shown in Fig.6, but quite satisfactory.

[0092] According to this variant implementation in the device 50-1 management gasifier unit has 60 overall command GID gasifier, a corresponding control command, CSO, but instead may be provided that the control device 60 team GID is part of the device 30 of turbine control, and thus the overall command GID gasifier from the generator 60 is fed to the input of the control device of the gasifier.

[0093] the Above embodiments of described in relation to blowing one way air mixture as the gasification agent. But instead, you can use the blast method with oxygen is m as the gasification agent. In this case, as shown in figure 10, the tract With oxygen attached to the inlet pipe axial compressor 21. The latter compresses the oxygen discharge device 22 segregation of air increases its pressure to be used as the gasification agent and submits to the tract And feeding the gasification agent. The flow rate and the pressure in the tract And feeding the gasification agent configures valve 23 settings selected pressure in the bypass D gasification agent and the degree of opening of the VNA 27. This layout eliminates the need to install shut-off and control valve 26 (see Fig 1) in the tract With oxygen.

[0094] the Following describes modifications CCUG system, control device and method of its operation according to the previously described variants of implementation.

[0095] the First modification

In the above-described embodiments, the implementation unit 56 degree of opening of the VNA, which is part of the device 50 and 50-1 management gasifier may further comprise a first corrector 563 for the introduction of amendments to the command to change the opening degree of BHA in the direction of increasing the volume of air supplied by the axial compressor 21, the fall of the characteristics of the latter as a result of wear and tear.

[0096] figure 11 schematically shows the layout of the unit degree of opening of the BHA according to the first modification of the present and the gain. As seen in figure 11, the first corrector 563 contains:

the adder 62, calculates the adjusted value of the required quantity of air, which is somewhat below the target by subtracting from the quantity required, specified on the basis of the overall command GID gasifier, the adjusted value obtained from the generator 61 of the signal, i.e. the divergence of the flow required to initiate correction;

the adder 63 calculates the difference between the adjusted value of the desired air quantity and the actual quantity of the gasification agent entering the gasifier 2;

- In PI controller 64 to calculate the amendments to the opening of the BHA, such as to resolve the discrepancy, calculated by the adder 63.

Check, however, that the magnitude of the output of the PI controller 64 may not be less than zero.

[0097] the Amendment in the degree of opening of the BHA received from the PI-regulator 64 is added in the adder 65 to the degree of opening of the BHA that meet the required amount of air, and give as the Executive commands for changing the degree of opening. The degree of opening of the VNA valve 27 is controlled based on the specified command.

[0098] For example, as the performance characteristics of an axial compressor 21 is reduced as a result of wear or similar reasons, the flow of air from the axial compressor 21 in the tract And feed gasif tiraumea agent falls. Accordingly, as described above, by introducing an amendment to a command to change the opening degree of BHA in the direction of increasing fed into the axial compressor 21 of the air quantity, given its performance, you can avoid nedopodacha the gasification agent, ensuring an uninterrupted supply of the gasification agent in the tract And in sufficient quantity.

[0099] the Pre-defined output value of the generator 61 of the signal subtracted by the adder 62 of the required quantity of air for the following reason. If you use directly the value specified functional block 561, excessive supply of compressed air from the axial compressor 21 drops to zero or increases, causing the valve 23 settings selected pressure is repeatedly opened and closed.

[0100] On Fig and Fig shows graphs illustrating the operation of the first corrector 563. On Fig shows the change of the flow gasification agent in the tract And if the knob 56 degree of opening of the BHA does not include the first corrector 563. On Fig shows the change of the flow gasification agent in the tract And if the knob 56 degree of opening of the VNA is equipped with the first corrector 563. In these graphs, a solid line shows a flow of the gasification agent inlet tract, Whereas the dashed line indicates the desired amount is in the air, coming from the generator 56 degree of opening of the VNA.

[0101] For example, if the drop in performance characteristics of an axial compressor 21 occurs at time T, and in the absence of the first corrector 563, flow gasification agent does not match the required amount of air, as seen on Fig, there is a lack of supply. On the contrary, as can be seen in Fig, if the first corrector 563, even if the fall of the operational characteristics of an axial compressor 21 also occurs at time T, the supply of the gasification agent corresponds to the desired amount of air and lack of supply does not occur.

[0102] the Second modification

In the above-described embodiments, the implementation unit 54 of the required quantity of coal in the structure of the devices 50 and 50-1 management gasifier may further comprise a second corrector 542 for the introduction of amendments to the calculated from the overall command GID gasifier required amount of coal on the basis of calorific value of coal fed to the gasifier 2.

[0103] On Fig schematically shows the layout of the unit the required quantity of coal according to the second modification of the present invention. As seen on Fig, the second corrector 542, which is part of the unit 54-1 required quantity of coal, contains

- unit 71 caloric ability and, specifies the calorific value based on the total team GID gasifier;

the adder 72 to calculate the difference between the value at the output of the generator 71 and the actual calorific value fuel gas from the gasifier 2;

generator 77 function that determines whether there is enough great is calculated by the adder 72 variation for the beginning of the correction procedure;

- In PI controller 73 to calculate the corrected value of the required quantity of coal, such as to resolve the discrepancy, if the generator 77 function has determined that the discrepancy is large enough to begin the process of correction.

[0104] namely, the generator 77 function gives zero if calculated by the adder 72, the difference lies in a beforehand specified range, or gives the magnitude of the discrepancy, if it goes beyond the range. The adjustment value of the amount of coal obtained from a proportional integral regulator 73 is added in the adder 74 to the specified required amount of coal calculated from the total team GID gasifier, thus obtaining the corrected value of the required quantity of coal, i.e. the Executive team to set the required quantity of coal. May be provided to the team to set the required quantity of coal has been linked with a command is to set the desired air flow into the carburettor.

[0105] Thus, depending on the calorific value of coal, modifies the desired amount of coal calculated on the basis of overall command GID gasifier, as a result, even if the calorific value or property supplied to the gasifier 2 pulverized coal change due to the transition on heating to other grade coal, it is possible to stabilize the calorific value coming from the gasifier 2 combustible gas. Consequently, it is possible to obtain the desired power of the gas turbine.

[0106] On Fig and Fig shows graphs illustrating the advantages of having a second corrector 542. On Fig shows the variation in the calorific value of the fuel gas if the unit 54 of the required quantity of coal not have a second corrector 542. On Fig shows the variation in the calorific value of the fuel gas if the unit 54 of the required quantity of coal with a secondary proofreader 542. On these graphs, the solid curve shows the calorific value coming from the gasifier 2 combustible gas, and the dotted line is the desired value of the calorific value of the fuel gas based on the total team GID gasifier.

[0107] As can be seen in Fig, in the absence of the second corrector 542 actual calorific value does not match specified, while Fig shows that when nalychevskogo corrector 542 actual calorific value responds to changes of a given magnitude and changes accordingly.

[0108] the Third modification

Unit 54-1 required quantity of coal with a secondary proofreader 542 may further comprise, as shown in Fig, setting block 74 to the settings coming from the PI-controller 73 of the adjusted value of the required value of coal according to the load of the generator.

[0109] For example, as seen in Fig, the supply of combustible gas under the overall command GID gasifier varies with load generator. If the calorific value of a combustible gas constant, the higher the load of the generator, the greater the required fuel gas. If the calorific value is changed, then the smaller, the greater the required gas, and the higher increases the alternator load, the greater the discrepancy in the supply for the high and low calorific value.

[0110] As shown in Fig the unit 54-1 required quantity of coal in the output value successfully make a correction for the change in calorific value. However, with this correction, as can be seen on the chart with Fig curve with the same slope simply shifted along the vertical axis Y, i.e. only changes the amount of displacement and the magnitude of the amendments does not depend on the load generator.

[0111] Therefore, as shown in Fig, the second corrector is additionally equipped with a tuning unit 74 to configure the amendments require the radiated amount of coal according to the load of the generator, that allows you to fine-tune the required quantity of coal taking into account the calorific value and the load of the generator. Namely, the second corrector 542-1 accepts command GID gasifier and contains a setup block 74, which contains

functional block 75 for calculating a correction factor based on the overall command GID gasifier and generator load;

the multiplier 76 to multiply the magnitude of the amendments from the output of the PI controller 73 of the correction factor from the output of the function block 75.

Value from the output of the multiplier 76 is supplied to the adder 74 to calculate the final values of the amendment corrector 542-1. This modification allows fine-grained control by setting the magnitude of the amendments taking into account the load of the generator.

[0112] the Fourth modification

In addition to the above-described first, second and third modifications provided by the settlement system for assessing the stability of the load of the generator, and if this device evaluates the load as established, can be powered, either individually or together, the first corrector 563 and the second corrector 542 or 542-1. The calculation device calculates, for example, the difference between the power of the gas turbine and the team on the power output of the gas turbine, and if the difference does not exceed some the swarm pre-specified value for a preassigned time interval, the load is considered as stable. On Fig shows an example layout of the settlement.

[0113] the Inclusion of the first and second correctors only for periods of steady-state load reduces operational risks.

[0114] a Fifth modification

In the above embodiment, as shown in Fig, the control unit gasifier is equipped

the adder 80 to add the command GIR-F forces the coal to disperse the gasifier 2 under overall command GID gasifier,

the adder 81 to add commands GIR-A force in the air to disperse the gasifier 2 under overall command GID gasifier,

moreover, the output value of the adder 80 may be input unit 54 of the required quantity of coal, and the output value of the adder 81 may be input unit 55 of the required quantity of air and knob 56 degree of opening of the VNA. Team GIR-F forces the coal and GIR-A force in the air are the control values that are calculated on the basis of commands GT_MWD on the power output of the gas turbine or the team on the production capacity of the generator set.

[0115] command GIR-F and GIR-A force calculated on the basis of commands GT_MWD on the power output of the gas turbine or power generator set, i.e. command on power output, add the overall command GID gasifier to calculate the command to set the required quantity of coal, command to set the required quantity of air and the commands for changing the opening degree of the VNA, which allows the gasifier 2 ahead to respond to load changes. This, in turn, helps to reduce fluctuations in the output power due to the sluggish response of the steam turbine 17, and in the early stages to stabilize the power of the gas turbine.

[0116] the Sixth modification

As in the above-described embodiments, implementation, atmospheric air enters the axial compressor 21, but in addition to the input of an axial compressor, you can apply part of the compressed air output of the compressor 12, as shown in Fig. In this case, the BHA-gate 27 (not shown) installed between the outlet of the compressor 12 and the inlet of an axial compressor 21.

[0117] With this arrangement, the axial compressor 21 takes compressed air from the compressor 12 to be used as the gasification agent. Axial compressor 21 further increase the pressure of compressed air, and then supplies it to the path And feeding the gasification agent. Part of the gasification agent, filed in the path And over the pass D to the output of the compressor 12.

[0118] In this case, the amount of compressed air which is taken away by the axial compressor 21, the configure command to change the opening degree of BHA-gate 27 (not shown)coming from the unit step and the opening of the VNA. Unit degree of opening of the VNA has a table set dependence, taking into account the characteristics of the compressor 12, and a tabular method calculates a degree of opening of the BHA-gate 27.

[0119] In this modification the part of the air compressor 12 is returned and reused, thereby reducing the outlet pressure of the compressor 12 and to increase the efficiency of the gas turbine 13.

[0120] as for KCVG system according to the above-described first embodiment of the implementation, in case of intake of atmospheric air for use as the gasification agent, the work of an axial compressor 21 is not dependent on operation of the compressor 12, therefore, compared with the intake of compressed air from the compressor 12 its advantage is the simpler management. All compressed air from the compressor 12 into the chamber 11 of the combustion and gas turbine 13, which may serve to maintain combustion in the chamber 11 of combustion and for cooling various parts of the camera 11 of the combustion and gas turbine 13.

[0121] the Seventh modification

In this modification, as shown in Fig, axial compressor 21, a compressor 12, turbine 13 and the generator 14 mounted on the same shaft. That is, since the axial compressor 21 is on the same shaft as the gas turbine 13, the rotation of the latter is transmitted across the shaft and causes the rotation of the axial compressor 21. Can be accommodated axial compressor 21 on the same shaft with a steam turbine 17, in this case, the rotation of the latter will be through the shaft to cause axial movement of the compressor 21. Finally, if the gas turbine 13 and the steam turbine 17 is installed on the same shaft, the rotation of each turbine via a shaft drives the axial compressor 21.

[0122] With this arrangement eliminates the need for installing a motor for rotating axial compressor 21, which reduces the dimensions CCUG-plant.

[0123] the Eighth modification

In the above-described embodiments, the implementation of the outlet of the bypass D gasification agent is located downstream from the outlet of compressor 12, but may be otherwise provided its location. Here are a few examples of binding bypass with a different location of the outlet pipe, each with a reference to the corresponding drawing. In all the following examples, the bypass D branched from the path And feeding the gasification agent at the point X, as in the above-described variants of implementation. Accordingly, Fig - 28 show the surroundings of the outlet pipe bypass D gasification agent for each of the following examples of the binding.

[0124] the First example of tying bypass the gasification agent

The first example of the bypass piping 22 gasifier the existing agent described in relation to Fig. In this example the outlet of the bypass D gasification agent is located at the entrance of the chamber 11 of the combustion. That is, the outlet of the bypass D gasification agent is located in the tract 7a compressed air, which supplies the camera 11 of the combustion of the compressed air from the compressor 12 to maintain combustion. With this arrangement, the outlet of the gasification agent of the axial compressor 21 selected bypass, can be used as part of the air supplied into the chamber 11 of the combustion chamber to support combustion.

[0125] the Second example strapping bypass the gasification agent

The second example of the bypass piping 22 the gasification agent is described with reference to Fig. In the present example includes a heat exchanger 20 in the path 13A of the water supply, which feeds in the VILLAGE 16 water from the condenser 18. Provided that the selected bypass D gasification agent enters the heat exchanger 20, gives its heat to the water flowing from the condenser 18 in the VILLAGE of 16, and out through the pipe 19, or may be used for cooling a gas turbine (not shown).

[0126] Thus, part of the gasification agent, heated to a high temperature when the pressure in the axial compressor 21 is supplied to the heat exchanger 20 through the bypass D gasification agent, its heat is withdrawn water from the condenser 18, which then clicks the attached pairs in the VILLAGE 16. Accordingly, the waste heat of the gasification agent, heated to a high temperature when the pressure in the axial compressor 21 is removed and refers to the movement of the steam turbine 17, which increases the overall efficiency CCUG system.

[0127] the Third example of tying bypass the gasification agent

The third example strapping bypass D gasification agent described in relation to Fig. In this example the outlet of the bypass D gasification agent is located at the exit of the VILLAGE 16. That is, the gasification agent selected bypass D, is mixed with the exhaust gases, gave its heat in the VILLAGE 16, and out through the chimney 19. Here the air is taken into the bypass D of tract And feeding the gasification agent to regulate flow and pressure of the gasification agent fed to the gasifier 2, is released through the chimney 19 together with the exhaust gases.

[0128] the Fourth example of tying bypass the gasification agent

The fourth example strapping bypass D gasification agent described in relation to Fig. In this example the outlet of the bypass D gasification agent is placed in the path 8A of the exhaust gases from the gas turbine 13 in the VILLAGE 16. That is, the gasification agent, heated to a high temperature when the pressure in the axial compressor 21, arrives in the VILLAGE 16 instead of the e with the exhaust gases from the turbine 13, which gives off its heat. Accordingly, in the VILLAGE you can increase the flow of liquid to generate steam supplied to the turbine 17 couple, which improves the overall efficiency CCUG system.

[0129] Provided parallel to the main bypass D' the gasification agent. Bypass D' branches off from the path And feeding the gasification agent at the point X and, like bypass D Fig, adjacent to the exit of the VILLAGE 16. The valve 23 settings selected pressure and shut-off valve 24 is located in the bypass D, which is adjacent to the tract 8A of the exhaust gases, while the shutoff valve 28 is located in the bypass D', which is adjacent to the exit of the VILLAGE 16. That is the standard shut-off valve 28 is closed and the gasification agent does not flow into the bypass D', whereby the flow rate and pressure of the gasification pressure entering the gasifier 2 tract And adjust the degree of opening of the valve 23 settings selected pressure in the bypass D.

[0130] However, if the bypass D fails, first, close the shutoff valve 24, blocking the flow gasification agent in the bypass D. Then open the shutoff valve 28, allowing the agent to flow into the bypass D' and further in the environment together with the exhaust gases through a flue 19.

[0131] the Fifth example of tying bypass the gasification agent

The fifth example strapping bypass D gasification agent about the Isan relation to Fig. First, as seen in Fig, steam turbine 17 consists of a turbine 17H high pressure turbine 17I medium pressure turbine 17L low pressure. Steam to drive a turbine 17H high pressure turbine 17I medium pressure turbine 17L low pressure comes from the VILLAGE 16. In this case, steam generated from the water coming from the condenser 18 is fed to the turbine 17L low pressure, and the steam from the higher pressure serves on the turbine 17I medium pressure. Further, the steam of higher pressure serves on the turbine 17H high pressure.

[0132] That is, when the supply of steam from the VILLAGE 16 to the turbine 17H high pressure turbine 17I medium pressure turbine 17L low pressure exhaust turbine 17H high pressure steam is heated in the VILLAGE of 16 and served in the turbine 17I medium pressure. Steam, the exhaust turbine 17I medium pressure fuel in the VILLAGE of 16 and served in the turbine 17L low pressure. Steam, the exhaust turbine 17L low pressure, enters the condenser 18 and is condensed.

[0133] In the presence of turbines 17H high pressure turbine 17I medium pressure turbine 17L low pressure, as shown in Fig, the outlet of the bypass D gasification agent is located in the middle part of the VILLAGE 16. Accordingly, for example, bypass D can join the path of the exhaust gases, the exhaust to generate steam for the turbine 17H high level of the pressure. Thus, part of the gasification agent of the axial compressor 21 may be purposely added to the flue gas, which has worked in stage heat exchanger and the temperature dropped.

[0134] that is, if the outlet of the bypass D gasification agent is located at the entrance of the VILLAGE 16, as described in the fourth example, the temperature of the agent at the exit of an axial compressor 21, which is equal to approximately 450-500°C below the temperature of exhaust gases from the turbine 13, which is equal to about 600°C, which reduces thermal efficiency. However, according to the present example through the addition to spent in the VILLAGE 16 flue gas, the temperature of which is below, you can increase the flow without compromising the efficiency of heat exchange.

[0135] As in the above-described fourth example (see Fig), there is a bypass D', branches off from the path And feeding the gasification agent at the point X and is parallel to D. bypass Bypass D' provided with a shut-off valve 28 and is also adjacent to the exit of the VILLAGE 16. That is, if the bypass D goes down, open the shutoff valve 28, allowing the gasification agent to flow into the bypass D' and further through the pipe 19 into the environment.

[0136] For this example was explicitly shows the layout of the steam turbine 17 of the turbine 17H high pressure turbine 17I medium pressure turbine 17L low pressure is Oia, it is understood that this arrangement can be applied in each of the above examples and options for implementation.

[0137] Next, as shown Fig may be provided that the bypass D', as described for the fourth and fifth examples, combined with a variety of the above variants bypass D gasification agent. For example, as shown in Fig parallel to the chambers D and D' were branched at the point X tract And feeding the gasification agent and the pass D is adjacent to the exit of an axial compressor 21 and the bypass D' adjacent to the exit of the VILLAGE 16. There may be provided different ways of tying the chambers D and D', as described above, and the binding can be designed with optional combination with in order to obtain various benefits.

[0138] the Above-described various embodiments of and modifications CCUG system, control device and method of its operation according to the present invention, however, the possible options are not limited to the described, but it is understood that can be created in arbitrary combination.

1. The combined cycle power plant with integrated gasification containing:
- gasifier generating a combustible gas by bringing the gaseous gasification agent in the reaction with the solid fuel;
- compressor that supplies compressed atmospheric the air;
a combustion chamber for burning fuel gas from the gasifier in a mixture of compressed air from the compressor;
- gas turbine driven by combustion gases flowing from the combustor;
- the compressor to increase the pressure of the gasification agent flow into the gasifier;
- path feeding the gasification agent increased pressure from the supercharger into the gasifier without the aid of valves;
- bypass the gasification agent, branches off from the duct feeding the gasification agent;
the first shut-off and regulating valve, the degree of opening which regulates the flow or pressure passing through the line feeding the gasification agent, and bypass the gasification agent is adjacent to the inlet pipe of the combustion chamber.

2. The combined cycle power plant with integrated gasification according to claim 1, additionally containing:
- the path of the fuel gas from the gasifier into the combustion chamber;
the third shut-off and regulating valve to adjust flow and pressure of fuel gas in the path of the fuel gas by changing the degree of opening of the valve.

3. The combined cycle power plant with integrated gasification according to claim 1, characterized in that the compressor selects a part of the compressed air from the compressor.

4. Power plant combined CEC is and the integrated gasification according to claim 1, characterized in that the supercharger is installed on the same axis of the gas turbine.

5. The combined cycle power plant with integrated gasification according to claim 1, characterized in that the bypass of the gasification agent is adjacent to the outlet nozzle of the compressor.

6. A control device for a combined cycle power plant with integrated gasification, which contains:
- gasifier generating a combustible gas by entering gaseous gasification agent in the reaction with the solid fuel;
a combustion chamber for burning fuel gas from the gasifier in a mixture of compressed air from the compressor;
- gas turbine driven by combustion gases flowing from the combustor;
- the compressor to increase the pressure of the gasification agent flow into the gasifier;
- path feeding the gasification agent increased pressure from the supercharger into the gasifier without the aid of valves;
- bypass the gasification agent, branches off from the duct feeding the gasification agent;
the first shut-off and regulating valve installed in the bypass gasification agent;
- second shut-off and regulating valve to control the flow rate of gas fed to the compressor;
moreover, the control unit features:
the first knob to set the desired R is vanishing fed to the gasifier, the gasification agent depending on the desired power output of the gas turbine;
the first control device to control the degree of opening of the first shut-off and control valve so that the flow in the gasifier agent was equal to the value specified by the first Adjuster;
- the second unit to set a degree of opening of the second shut-off and control valve so that the amount of the gasification agent, in excess of required, have been submitted to the bypass gasification agent;
the second control device to control the degree of opening of the second shut-off and regulating valve according to the commands of the second unit.

7. The control device according to claim 6, characterized in that the combined cycle power plant with integrated gasification further comprises:
- the path of the fuel gas from the gasifier into the combustion chamber;
the third shut-off and regulating valve in the path of the fuel gas supply;
moreover, the control device further comprises:
the third unit to set the flow rate supplied to the combustion chamber a combustible gas depending on the required output power of the gas turbine and environmental parameters;
the third control device to control the degree of opening of the third shut-off and control valve so that the flow into the combustion chamber a combustible gas was equal to the specified setpoint value

8. The control device according to claim 6, characterized in that the first unit calculates the required combustion chamber a combustible gas depending on the power required for the gas turbine and environmental parameters and sets required by the gasifier, the amount of the gasification agent depending on the desired amount of fuel gas.

9. The control device according to claim 6, further containing a first corrector for an amendment to a command to change the opening degree of the second shutoff valve in the direction of increasing the volume of air entering the compressor, depending on the operational characteristics of the compressor.

10. The control device according to claim 9, further containing a calculation device for evaluating the stability of the load, and if the calculation device estimates the load stable, is driven by the first corrector.

11. The control device according to claim 6, characterized in that the combined cycle power plant with integrated gasification further comprises:
- the path of feed of solid fuel in a gasifier;
fourth shut-off and regulating valve in the path of feed of solid fuel;
moreover, the control device further comprises:
a fourth unit for the job required by the gasifier particulate Topley is a, on the basis of the power required for the gas turbine;
a fourth control device to control the degree of opening of the fourth shut-off and control valve so that the flow in the gasifier for solid fuel was equal to a preset fourth unit value.

12. The control device according to claim 11, further containing a second corrector for amendment in the amount of the required quantity of solid fuel, depending on the calorific value of solid fuel fed to the gasifier.

13. The control device according to item 12, wherein the second corrector amend the amount of the required quantity of solid fuels on the basis of calorific value of solid fuel and load of the generator set.

14. The device control section 12, optionally containing current system for assessing the stability of the load and if the load is deemed by the calculation device is stable, actuate the second corrector.

15. The method of controlling the combined cycle power plant with integrated gasification, which contains:
gasifier generating a combustible gas by bringing the gaseous gasification agent in the reaction with the solid fuel;
a combustion chamber for burning fuel gas from the gasifier in a mixture of compressed air iscompressed;
- gas turbine driven by combustion gases flowing from the combustor;
- the compressor to increase the pressure of the gasification agent flow into the gasifier;
- path feeding the gasification agent increased pressure from the supercharger into the gasifier without the aid of valves;
- bypass the gasification agent, branches off from the duct feeding the gasification agent;
the first shut-off and regulating valve installed in the bypass gasification agent;
- second shut-off and regulating valve to control the flow rate of gas fed to the compressor;
moreover, the control method includes:
the stage at which specify required by the gasifier, the amount of the gasification agent depending on the desired capacity of the gas turbine;
- the stage at which the degree of opening of the first shut-off and regulating valve is controlled so that the quantity fed to the gasifier, the gasification agent was equivalent required;
- the stage at which you give the command to open a second shut-off and regulating valve by a certain amount, such that the number of the gasification agent, in excess of required, have been submitted to the bypass gasification agent;
- the stage at which the second shut-off and control valve is controlled according to the command to change stephaniedrake.

16. The combined cycle power plant with integrated gasification containing:
gasifier generating a combustible gas by bringing the gaseous gasification agent in the reaction with the solid fuel;
- compressor for compressing ambient air;
a combustion chamber for burning fuel gas from the gasifier in a mixture of compressed air from the compressor;
- gas turbine driven by combustion gases flowing from the combustor;
- the compressor to increase the pressure of the gasification agent flow into the gasifier;
- path feeding the gasification agent increased pressure from the supercharger into the gasifier;
- bypass the gasification agent, branches off from the duct feeding the gasification agent;
the first shut-off and control valve for controlling the flow or pressure of the gasification agent passing through the line feeding the gasification agent, characterized in that the bypass of the gasification agent is adjacent to the entrance of the combustion chamber.

17. A control device for a combined cycle power plant with integrated gasification, which contains:
gasifier generating a combustible gas by bringing the gaseous gasification agent in the reaction with the solid fuel;
a combustion chamber for burning fuel gas from the gasifier in MESI compressed air from the compressor;
- gas turbine driven by combustion gases flowing from the combustor;
- the compressor to increase the pressure of the gasification agent flow into the gasifier;
- path feeding the gasification agent increased pressure from the supercharger into the gasifier;
- bypass the gasification agent, branches off from the duct feeding the gasification agent;
the first shut-off and regulating valve installed in the bypass gasification agent;
- second shut-off and regulating valve to control the flow rate of gas fed to the compressor;
moreover, the control device further comprises:
the first knob to set the desired flow rate fed to the gasifier, the gasification agent depending on the desired capacity of the gas turbine;
the first control device to control the degree of opening of the first shut-off and control valve so that the flow in the gasifier agent was equal to the value specified by the first Adjuster;
- the second unit to set a degree of opening of the second shut-off and control valve so that the amount of the gasification agent, in excess of required, have been submitted to the bypass gasification agent;
the second control device to control the degree of opening of the second shut-off and regulating valve is under the command of the second unit;
the first corrector for an amendment to a command to change the opening degree of the second shutoff valve in the direction of increasing the volume of air entering the compressor, depending on the operational characteristics of the compressor;
- current system for assessing the stability of the load;
moreover, if the load is deemed by the calculation device is stable, actuate the first corrector.

18. A control device for a combined cycle power plant with integrated gasification, which contains:
gasifier generating a combustible gas by bringing the gaseous gasification agent in the reaction with the solid fuel;
a combustion chamber for burning fuel gas from the gasifier in a mixture of compressed air from the compressor;
- gas turbine driven by combustion gases flowing from the combustor;
- the compressor to increase the pressure of the gasification agent flow into the gasifier;
- path feeding the gasification agent increased pressure from the supercharger into the gasifier;
- bypass the gasification agent, branches off from the duct feeding the gasification agent;
the first shut-off and regulating valve installed in the bypass gasification agent;
- second shut-off and regulating valve to control the flow of gas is, supplied to the supercharger;
- the path of feed of solid fuel in a gasifier;
fourth shut-off and regulating valve in the path of feed of solid fuel;
moreover, the control device further comprises:
the first knob to set the desired flow rate fed to the gasifier, the gasification agent depending on the desired capacity of the gas turbine;
the first control device to control the degree of opening of the first shut-off and control valve so that the flow in the gasifier agent was equal to the value specified by the first Adjuster;
- the second unit to set a degree of opening of the second shut-off and control valve so that the amount of the gasification agent, in excess of required, have been submitted to the bypass gasification agent;
the second control device to control the degree of opening of the second shut-off and regulating valve according to the commands of the second knob;
a fourth unit for the job required by the gasifier quantity of solid fuel, depending on the power required for the gas turbine;
a fourth control device to control the degree of opening of the fourth shut-off and control valve so that the flow in the gasifier for solid fuel was equal to a preset fourth unit size; the second corrector for amendment in the amount of the required quantity of solid fuels on the basis of calorific value of solid fuel fed to the gasifier;
- current system for assessing the stability of the load;
moreover, if the load is deemed by the calculation device is stable, actuate the second corrector.



 

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18 cl, 6 dwg

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