Plant mixed type with gas and steam turbines

 

The invention relates to power plants of mixed type. The station includes a gas turbine (1) with generator (28) and steam generators (2, 10) for the steam turbine (6) with generator (29), and the exhaust gas of the gas turbine is given in the first HRSG (1) with superheaters (23, 24), economizer (3), evaporator high pressure (22) and the auxiliary burner (27), and flue gases thermoprobes installation served in the second heat boiler (10). In the second washed flue gases exhaust-heat boiler (10) are located on one side of the evaporator high pressure (16) with the system hanging pipes (13) and steam dryer high pressure (11), on the other hand, the evaporator low pressure (17) with the system hanging pipes (14) and the steam drum low pressure (12). Evaporator high pressure (16) is connected via a steam line (21) located in the first HRSG (2) first (23) and second (24) the reheaters of high pressure. Between the two reheaters of high pressure (23, 24) is steam dryer high pressure with an external refrigerator (46). The high-pressure steam superheater (24) is connected via a steam line high pressure (20) and the evaporator low pressure (17) through paraproteinaemia the waste heat of flue gases, formed during thermal conversion processes so that improved economic efficiency of the overall process. 12 C.p. f-crystals, 1 Il.

The invention relates to power plants of mixed type containing gas turbine generator and steam generators for steam turbine pressure generator, and the exhaust gas of the gas turbine is fed into the first boiler with a heating surface for heating the feed water, steam production and its overheating and flue gases thermoprobes installation served in the second HRSG.

Utilization of low temperature waste heat of flue gases generated during thermal transformation processes, to generate electricity has not been possible to date due to low economic efficiency jointly operated equipment.

Relatively low and because of strongly varying the temperature of the exhaust gas such sources of waste heat that is allowed to date to receive pairs only with low settings. The electrical efficiency of electric power generation by the generator in combination with a vapor the patent application Germany 19523062 A1 famous power plant mixed, consisting of a gas-turbine and steam-turbine power plants.

This power station mixed type consisting of a gas-turbine and steam-turbine power plants, steam turbine driven by steam generator supplied with the furnace and/or steam boiler, washed exhaust gas of the gas turbine. Order adjustable heated compressed blast of air of a gas turbine provided with a heat exchanger. For the most economical operation of power plants of mixed type in partial load heat exchanger for blowing air to the gas turbine installation is located in the chimney of the steam generator and is designed as a heat exchanger, and flue gas is directed around the surface of the tubes of the heat exchanger and blowing air inside these tubes. The heat exchanger is connected to the pipeline blast of air that runs from the compressor to the gas burner of a gas turbine, through a three-way valve and the auxiliary pipe.

From not published until the present patent application Germany 19734862.9 known thermal power plant including a gas turbine and a steam generator for a steam turbine from a stage performance by a couple of high pressure with auxiliary combustion chamber and contains a heat exchanger, used in the production of steam. For the economical production of steam designed for steam turbine pressure, in particular when an oscillating load, provided that when generating high-pressure steam used three sequentially arranged stages of the superheater high pressure with two injection with desuperheaters, and with the development of steam intermediate pressure two-stage superheater intermediate pressure injection by pereohlajdenia. End-stage superheater high pressure or intermediate pressure superheater located on the same section of the boiler, the pipes are arranged alternately in the form of combs near each other. The first stage of the intermediate pressure superheater is located between or behind both stages of the superheater high pressure. The first furnace, utilizing the exhaust gas of the gas turbine, is located in the area of the final stages of the superheaters, the second furnace is in front of the evaporator high pressure, and are regulated: the first furnace depending on the temperature of the steam at the outlet of the first stage of the intermediate pressure superheater, a second furnace according to ectrically station mixed type, with gas and steam turbines, so that low-temperature waste heat from flue gases generated during thermal conversion processes, such as technological flue gases in waste incineration plants, and similar processes were used to produce steam and to improve the economic efficiency of the overall process in result of the utilization of waste heat of flue gases.

This task is solved through a distinctive feature of p. 1 claims, dependent claims presents the preferred embodiment of the invention.

According to the invention, low-temperature waste heat from flue gases generated during thermal conversion processes, for example, in the production of cement and lime, iron ore sintering plants, steel production, waste materials, etc. that is given first in the so-called technological HRSG, before the flue gases will be cleaned and then cleaned and cooled will be released into the atmosphere.

Efficient use of heat in the process recovery boiler is achieved by installing an evaporator Vysokogorsky through the hanging pipe corresponding evaporative systems for overheating. Such high-pressure superheated steam, acting through the connecting pipe, mixed with steam generated in the HRSG on the side of exhaust gas of the gas turbine.

Both the steam flow together overheat, at least two superheaters boiler of the gas turbine to the required temperature. Through the connecting pipe superheated steam is fed to stage high-pressure steam turbine.

Low pressure steam produced in the process recovery boiler, flows through the low-pressure drum and the connecting piping to the tank feed water, in which there is a thermal degassing. The residual quantity of low pressure steam is supplied through the connecting pipeline stage low-pressure steam turbine. Warning of pressure loss on the side of the flue gases is achieved sequentially connected, integrated into an exhaust fan.

Feedwater heating in the economizer, located at the end of the recovery boiler of the gas turbine. Through the three-way valve feed water is distributed between the respective high-pressure reels.

Through the atom as when low water temperatures at the inlet of the high pressure economizer becomes possible a very high degree of utilization of the waste heat recovery boiler of the gas turbine.

Electricity produced by the generator gas turbines with DLN combustion chambers and steam turbine generator pressure.

When failure of a gas turbine HRSG operates in the so-called simulated mode of disposal. Blower fan circulates in this case, this quantity of air in the boiler that produces the same amount of exhaust gas during operation of the gas turbine.

Auxiliary burner at the inlet of the boiler heats the cold air so that provided the required steam parameters.

Electric station mixed type according to the invention combines the utilization of waste heat on the side of process exhaust gases through the evaporators of high and low pressure with subsequent minor overheating.

Full steam superheat occurs on the side of exhaust gas of the gas turbine using detachable superheater, evaporator high pressure and high pressure economizer. Ek is urbini, and evaporator low pressure side of the flue gases thermoprobes installation. Due to the high degree of utilization of waste heat on the side of exhaust gas of the gas turbine is possible electricity production in General, with high electrical efficiency.

Part of the low pressure steam is used for thermal degassing, the remainder is used to generate electricity, the pressure and temperature of steam to a significant extent determined by the parameters of the process gas.

The shortcomings of the previous schemes of the equipment due to the fact that:

electricity generation only when using low-temperature waste heat limited electrical efficiency,

thanks to the auxiliary combustion chamber on the side of the flue gases thermoprobes installation temperature increases the gas station before pregeneration-exchanger, which leads not only to increased electricity production, but also to increased energy losses and the losses of the exhaust gas (the additional amount of flue gas),

- in the waste gases, containing in most cases, dust, due to the high efficiency of the auxiliary furnace is achieved softening point of dust is lifted station mixed type according to the invention can be formulated as follows:

- due to the displacement of the auxiliary furnace in the gas turbine increases electrical efficiency, thanks to the power generation gas turbine, at the same time high temperature of exhaust gas of the gas turbine provides elevated temperature of hot steam and, therefore, further increases efficiency on the side of the steam turbine,

- high damping factor to large fluctuations in the quantity of steam in thermoprobes installation (for example, technologically-induced fluctuations of the temperature or the amount of exhaust gas), thanks to the steam-generating system on the side of exhaust gas of the gas turbine,

- characterisation of exhaust gas and large dynamics of rotors used in such processes power station gas turbines with multiple shafts to maintain in a very narrow limits for steam turbine steam temperature and for large changes of load on the gas turbine with the relevant regulation,

- if the failure or stop on the side of the process (thermoprobes installation) possible Autonomous generation of electricity through the HRSG gas turbine,

- flexible production ele is their electrical power with a total steam capacity peregretogo pair,

low values of NOx resulting from the application of the burners "Dry-Low-NOx in a gas turbine (for example, hybrid burners with NOx = 13 ppm),

- extended range of application in thermal disposal of special wastes, which usually dominated by high process temperatures with negligible mass flow of the exhaust gases and large pollution by harmful substances (vanadium, chlorine and alkalis). For reasons connected with the material, a large overheated on the side of the flue gases thermoprobes installation is not possible, the result may be offset overheating on the side of the exhaust gas turbine,

- no limitation of steam parameters parameters of process off-gas,

potential efficiency for electricity production is about 60 %,

- given that thermoperiodic installations always formed technologically driven waste heat, it may be regarded as a free capacity of the heat used to achieve economic effect.

More in detail the invention is illustrated by the example diagram method (see drawing), while electricity produced by generator 28 of the gas turbine 1 Anouki agglomeration of ores, steel installation or incinerators, low-temperature waste heat from thermoprobes installation is given in the HRSG 10 process gas. A high degree of heat recovery is achieved by installing an evaporator high pressure 16 and evaporator low pressure system 17.

To prevent condensation of both the steam flow slightly overheat in hanging pipes 13 and 14 of the respective evaporative systems 16 and 17. Such high-pressure superheated steam is supplied through the connecting pipe 21 to the mixing with the steam generated in the HRSG 2 gas turbines, through evaporator high pressure 22 and drum high pressure 5.

The two portions of steam superheated to the desired temperature in both superheaters 23 and 24. Through the connecting pipe 20 superheated steam enters the steam turbine 6.

Low pressure steam produced in the process recovery boiler 10 passes through the low pressure drum 12 and the connection lines 25 in the feedwater tank 9, in which there is a thermal degassing. The rest of low-pressure steam is supplied through the connecting pipe 19 in PA is duplicata suction fan 15, built-in thermoprobes installation, as in the mode of utilization of the fan operates at lower operating temperatures.

Feedwater heating in the economizer 3 on the side of exhaust gas of the gas turbine 2. Using the three-way valve 26 feed water is distributed between the respective reels high pressure 5 and 11.

External water-to-water heat exchanger 8 feed water is cooled delivered from the condenser 7 condensate so that, with the steady low water temperature at the inlet of the high pressure economizer 3 possible a very high degree of utilization of the exhaust heat recovery boiler 2 gas turbine.

Electricity is produced, as already mentioned, the generator 28 of the gas turbine 1 and the generator 29 steam turbine 6. In case of failure of the gas turbine 1, the boiler operates in the so-called simulated mode of disposal. The blower fan 4 takes the same amount of air through the pipe 42 into the heat recovery boiler 2, when the gas turbine. When this auxiliary burner 27 when burning natural gas 43 heats the cold air so that provided the required parda feed pump low pressure 32 provide through pipes 38 and 39 need water for both evaporator high pressure 16 and 22 in waste heat boilers 2 and 10 and the evaporator low pressure 17 in the HRSG 10.

Exhaust steam turbine 6 pairs turns into condensate, which is cooled in the condenser 7 and using a condensate pump 33 is discharged through the condensate pipe 34 into the tank feed water 9.

List of items:

1 - gas turbine;

2 - HRSG (side exhaust gas

gas turbines);

3 - economizer to preheat the feed water;

4 - blast fan;

5 - steam dryer high pressure;

6 - steam turbine;

7 - condenser;

8 - water-to-water heat exchanger;

9 - tank feed water;

10 - HRSG, located in

thermoprobes installation;

11 - steam dryer high pressure;

12 - steam low pressure drum;

13 - hanging pipes, high pressure;

14 - hanging pipes, low pressure system;

15 - exhaust fan;

16 - evaporator high pressure;

17 - evaporator low pressure;

18 - steam line low pressure, leading to 9;

19 - low steam line pressure, leading to 6;

20 - steam piping high pressure;

21 - steam piping high pressure;

22 - evaporator high pressure;

23 - the first high-pressure steam superheater;

Hiorthoy valve;

27 - auxiliary burner;

28 generator 1;

29 - generator 6;

30 - engine 4;

31 - feedwater pumps high pressure;

32 - nutrient low pressure;

33 condensate pump;

34 - condensate piping;

35 - pipe flue gas;

36 - filter (flue gas cleaning);

37 - pipe for the flue;

38 - nutrient high pressure pipeline;

39 - nutrient low-pressure pipeline;

40 - steam piping high pressure;

41 pipeline to divert exhaust gas from 1;

the 42 - duct;

43 natural gas pipeline;

44 - nutrient high pressure pipeline, designed for 11;

45 - nutrient high pressure pipeline, designed for 5;

46 - cooler surface, located a 5.

Claims

1. Plant mixed type containing gas turbine generator and steam generators for steam turbine pressure generator, and the exhaust gas of the gas turbine is given in the first boiler with a heating surface for heating the feed water, steam production and its overheating and smoke homemom flue gases, HRSG (10) are located on one side of the evaporator high pressure (16) with (13) suspended pipes and steam dryer high pressure (11), on the other hand - evaporator low pressure (17) (14) the suspension tubes and steam drum low pressure(12),evaporator high pressure (16) is connected via a steam line (21) located in the first HRSG (2) first (23) and second (24) the reheaters of high pressure, the second high-pressure steam superheater (24) is connected via a steam line high pressure (20) with a steam turbine (6) and the evaporator low pressure (17) is connected via a steam line low pressure (25) also with a steam turbine (6) .

2. Plant mixed type p.1, characterized in thatbetween the first (23) and second (24) the reheaters of high pressure is steam dryer high pressure (5) cooler (46) of the surface.

3. Plant mixed type under item 1,characterized in thatin colder parts of the boiler (2) is the economizer (3) for preheating feedwater both recovery boilers (2) and (10).

4. Plant mixed type on p. 3,characterized in thatthe feedwater tank (9) is connected through the pit which I mixed type in one of the paragraphs.3 and 4,characterized in thateconomizer (3) is connected through a nutritious pipeline (44) with a steam drum high pressure (11) of the boiler (10) and through a nutritious pipeline (45) with a steam drum of a high pressure (5), and the distribution corresponding number of feed water between the heat recovery boilers (2) and (10) is provided through the three-way valve (26) .

6. Plant mixed type in one of the paragraphs.3-5,characterized in thattank (9) of the feed water is connected through a nutritious low-pressure pipeline (39) from feed pumps low pressure (32) and a steam drum low pressure (12) of the boiler (10).

7. Plant mixed type in one of the paragraphs.3-6,characterized in thatsteam turbine (6) and the tank (9) of the feed water are connected through the condensate pipe (34) to the condenser (7) and condensate pump (33).

8. Plant mixed type under item 7,characterized in thatthe condensate pipe (34) is a water-water heat exchanger (8), through which the omitted nutrient high pressure pipeline (38) .

9. Plant mixed type under item 1,characterized in thatin the pipe (35) of flue gases for Collesano type p. 9,characterized in thatin the pipe flue gases (35) between the heat recovery boilers (2) and (10) is a pipe (37) to divert exhaust gases.

11. Plant mixed type on p. 1, whereinthe fact thatin the pipeline (41) of the exhaust gas of the gas turbine (1) at the input of the boiler (2) is auxiliary burner (27).

12. Plant mixed type on p. 11,characterized in thatauxiliary burner (27) is connected through line (42) with blowing fan (4, 30).

13. Plant mixed type in one of the p. 11 or 12,characterized in thatthe gas turbine (1) and auxiliary burner (27) connected respectively to the pipeline (43) or the pipeline.

 

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FIELD: electric power and chemical industries; methods of production of the electric power and liquid synthetic fuel.

SUBSTANCE: the invention presents a combined method of production of the electric power and liquid synthetic fuel with use of the gas turbine and steam-gaseous installations and is dealt with the field of electric power and chemical industries. The method provides for the partial oxidation of hydrocarbon fuel in a stream of the compressed air taken from the high-pressure compressor of the gas turbine installation with its consequent additional compression, production of a synthesis gas, its cooling and ecological purification, feeding of the produced synthesis gas in a single-pass reactor of a synthesis of a liquid synthetic fuel with the partial transformation of the synthesis gas into a liquid fuel. The power gas left in the reactor of synthesis of liquid synthetic fuel is removed into the combustion chamber of the gas-turbine installation. At that the degree of conversion of the synthesis gas is chosen from the condition of maintenance of the working medium temperature at the inlet of the gas turbine depending on the type of the gas-turbine installation used for production of the electric power, and the consequent additional compression of the air taken from the high-pressure compressor of the gas-turbine installation is realized with the help of the gas-expansion machine powered by a power gas heated at the expense of the synthesis gas cooling before the reactor of synthesis. The invention allows simultaneously produce electric power and synthetic liquid fuels.

EFFECT: the invention ensures simultaneous production of electric power and synthetic liquid fuels.

2 cl, 2 dwg

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