The method of operation of a thermal power station

 

The invention relates to the field of power engineering and can be used in thermal power plants. The technical result achieved by the present invention is to increase the sustainability and efficiency of thermal power plants. To achieve this result, a method of operating thermal power station, which is produced in the steam boiler steam serves the steam turbine, the accumulated impurities in the boiler water away from the boiler blowdown water supplied to the boiler feed water heated by steam extraction turbine regenerative heaters. Heated in the regenerative heaters feed water before it enters the steam boiler is additionally heated purge water. 1 Il.

The invention relates to the field of power engineering and can be used at thermal power plants.

There is a method of operating thermal power station, which is produced in the steam boiler steam is served in a steam turbine that accumulate in the boiler water and mineral impurities are removed from the boiler through the pipeline blowdown water separator continuous blowdown generated pairs sent in on the power station and then drain into the sewage system. Feed water supplied to the boiler is heated in the regenerative heaters qualify steam turbine (see Glushchenko L. F. and other heating equipment in the building and construction industry. - K.: visa school, 1991, figure 20.7. and the description of him on pages 229-230).

The disadvantages of this method is the reduced environmental friendliness and efficiency of thermal power plants due to incomplete use of the mass and high-grade heat purge water, the necessity of applying for its utilization of special equipment - continuous blowdown separators and heat exchangers cooling and contamination of surface waters saline sewage.

The technical result achieved by the present invention is to increase the sustainability and efficiency of thermal power plants by utilizing high potential heat purge water without the use of continuous blowdown separators.

To achieve this result, a method of operating thermal power station, which is produced in the steam boiler steam is served in a steam turbine that has accumulated in the boiler water and mineral impurities away from the boiler blowdown water.The difference of the proposed method is that heated in the regenerative heaters feed water before it enters the steam boiler is additionally heated purge water.

A new set of features of the method allows to achieve the desired technical result due to the best possible use of the high potential heat purge water for preheating the feed water and the reduction due to this fuel consumption in thermal power stations, as well as due to the exclusion from the scheme of the separator blowdown water.

Conducted by the applicant's analysis of the prior art, including searching by the patent and scientific and technical sources, and identify sources that contain information about the equivalents of the claimed invention, has allowed to establish that the applicant had not discovered similar, characterized by symptoms that are identical to all the existing elements of the claimed invention. The definition from the list of identified unique prototype as the most similar in essential features analogue, has identified a set of essential towards the technical result of the distinctive features set forth in the claims.

Therefore, the claimed invention meets the condition of “but the al conducted an additional search of the known solutions to identify signs that match the distinctive features of the prototype of the signs of declared facilities. The search results showed that the claimed invention not apparent to the expert in the obvious way from the prior art because the prior art defined by the applicant, not the influence provided the essential features of the claimed invention transformations to achieve a technical result. In particular, the claimed invention is not provided by the addition of known means of any known part attached to it according to certain rules to achieve a technical result, in respect of which it is the effect of such additions.

Therefore, the claimed invention meets the condition of “inventive step”.

Information confirming the ability of the invention to provide the above technical result are as follows.

The drawing shows a diagram of thermal power station that implements the proposed method.

Thermal power plant includes a steam turbine 1, is connected by a steam line steam 2 steam boiler 3, is connected to generative the high pressure heaters 6, connected via the heating medium to the selection of the steam turbine and water-to-water heat exchanger 7 is connected via the heating medium to the pipeline blowdown water 4.

The method of operation consists of the following operations.

In the steam boiler 3 produce steam, through which the live steam pipeline 2 served in the steam turbine 1 to generate electricity. Feed water for the feedwater pipeline 5 is sent to a steam boiler 3 through regenerative heaters 6 and water-to-water heat exchanger 7. Feedwater heating in the regenerative heaters 6 is realized by the selection of the steam turbine. Accumulating in the boiler water and steam boiler 3 mineral impurities are continuously removed from the drum of the boiler blowdown water through the pipeline 4, which is then sent to a water-water heat exchanger 7, where it is used as a heating medium. New features allow you to maximize the use of high capacity heat purge water, reducing the fuel consumption in thermal power stations, without compromising generate electricity through regenerative extraction steam turbine.

Thus, the proposed method of operating thermal power station allows you to increase environmentally friendly and to simplify the scheme of thermal power plants due to the exclusion of special equipment type schemes disposal of purge water separators and heat exchangers of the cooling.

The above data confirm that the implementation of the use of the claimed method the following cumulative conditions:

- the claimed method of operating thermal power station designed for use in industry in the field of heat;

for the inventive method of operating thermal power station, as he is characterized in the claims, confirmed the possibility of its implementation using the steps described in the application of tools and techniques;

- mode of operation of thermal power plant embodying the claimed invention, it is able to achieve the desired technical result.

Therefore, the claimed invention meets the condition of “industrial applicability”.

Claims

The method of operation of a thermal power station, which is produced in the steam boiler steam serves the steam turbine, the accumulated impurities in the boiler water away from the boiler blowdown water supplied to the boiler feed water heated by steam extraction turbine regenerative heaters, characterized in that heated in the reg is th water.

 

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The invention relates to the field of power engineering and can be used in thermal power plants

FIELD: thermal engineering; thermal power stations.

SUBSTANCE: proposed operating process of thermal power station is as follows. Boiler-generated steam is conveyed to turbine wherefrom it is supplied to condenser for condensing it; full-flow condensate is delivered by means of condensate pump to low-pressure regenerative heaters and then to high-pressure deaerator; makeup water is deaerated in atmospheric-pressure deaerator and conveyed to full-flow condensate path, vented steam being discharged from atmospheric-pressure deaerator into atmosphere. Flowrate of vented steam discharged from atmospheric-pressure deaerator is regulated with respect to desired content of oxygen dissolved in mixed flow of makeup water and full-flow condensate beyond vacuum system of turbine unit, for instance downstream of low-pressure heater second along full-flow-condensate path.

EFFECT: enhanced economic efficiency and operating reliability of thermal power station.

1 cl, 1 dwg

FIELD: heat power engineering.

SUBSTANCE: according to proposed method steam produced in boiler is delivered to turbine, waste steam of turbine is condensed in condenser, and main condensate from turbine is delivered into low-pressure regenerative heaters and further on into higher pressure deaerator by condensate pumps, and additional feed water is deaerated in deaerator. For this purpose heating agent is fed deaerator, and then deaerated additional feed water is delivered into main condensate conduit. Regulation of rate of heating agent of additional feed water deaerator is carried out basing on preset value of content of dissolved in mixture of additional feed water and main condensate of turbines out of the limits of vacuum system of turboplant, for instance, after second low-pressure heater of main condensate in direction of flow.

EFFECT: improved reliability of thermal power station, increased economy.

1 dwg

FIELD: heat power engineering.

SUBSTANCE: method of operation of heat power station includes condensing of waste steam from turbine, heating of turbine condensate by regenerative extraction of steam in regenerative heaters, heating of heating system water from consumers by steam of heating extractions in heating system heaters. According to invention, heat pump is installed in heat power station circuit, part of turbine waste steam is condensed in turbine condenser, and part, in heat pump evaporator, condensate from turbine before heating in regenerative heaters and heating system water getting from consumers before heating in heating system heaters are heated in condensers of heat pump, thus increasing efficiency of power station with heat pump.

EFFECT: increased economy and generation of energy at heat consumption.

1 dwg

FIELD: heat power engineering.

SUBSTANCE: proposed steam-gas power plant contains steam turbine unit with steam boiler operating on solid fuel and steam turbine, and gas-turbine unit with gas turbine using heated compressed air as working medium, surface heater of compressed air for heating compressed air by solid fuel combustion products, and gaseous fuel combustion chamber for additional contact heating of compressed air. Surface heater of compressed air is installed in high-temperature part of convection gas pass of steam boiler.

EFFECT: increased economy of steam-gas power plant at combustion of solid fuel.

2 cl, 2 dwg

FIELD: power engineering.

SUBSTANCE: invention relates to hydroturbine plants in which heated water is used as working medium. Proposed regenerative heat hydraulic turbine plant contains steam generator, cooler injector, compressor, power injector, hydraulic turbine, electric generator, cooler, power injector pump, deaerator pump, deaerator, feed pump, air heater, blower, heat exchanger of heat supply circuit, heat collector. Steam generator is connected to cooler injector, and compressor is connected with cooler and with inlet of injector intake chamber. Outlet of injector is connected with nozzle chamber of power injector into intake chamber of which water cooled in cooler is delivered. Outlet of power injector is connected to hydraulic turbine, and outlet of turbine is connected with cooler and, through pump, with deaerator and also with air heater, heat exchanger of heat supply system and with heat collector.

EFFECT: increased efficiency of plant, reduced cost and load on environment.

2 cl, 2 dwg

FIELD: heat power engineering; thermal power stations.

SUBSTANCE: according to proposed method, steam generated in boiler is directed into turbine, waste steam in condensed in condenser, main condensate of turbines is delivered by condensate pumps into low-pressure regenerative heaters and further on into higher-pressure deaerator, additional feed water is deaerated in vacuum deaerator to which source water and heating agent are delivered. Heating of additional source water is provided by mixing water with condensate of regenerative low-pressure heater first in direction of main condensate flow. Control of rate of condensate of regenerative low-pressure heaters used for heating source additional feed water is carried out basing on preset value of content of dissolved oxygen in mixed flow of additional feed water and main condensate of turbine out of the limits of vacuum system of turbine plant, for instance, after low-pressure heater second in direction of main condensate flow.

EFFECT: improved economy and reliability of thermal power station.

1 dwg

FIELD: heat power engineering.

SUBSTANCE: proposed thermal power station contains steam turbine with main condensate pipeline connected to higher pressure deaerator, additional feed water deaerator with pipelines of source water and heating agent. Station is furnished with regulator of dissolved oxygen content in mixed flow of main condensate and additional feed water. Said regulator is connected with oxygen content pickup connected to main condensate pipeline out of the limits of vacuum system of turboplant, for instance, after second low-pressure heater in direction of main condensate flow and with regulating member installed on heating agent pipeline of additional feed water deaerator.

EFFECT: increased economy and improved reliability of thermal power station.

1 dwg

FIELD: heat power engineering.

SUBSTANCE: proposed thermal power station contains steam turbine with main condensate pipeline connected to higher pressure deaerator, atmospheric deaerator of additional feed water with flash steam outlet and heating agent pipelines. Station s furnished with regulator of dissolved oxygen content in mixed flow of main condensate and additional feed water. Said regulator is connected with oxygen content pickup connected to pipeline of main condensate out of the limits of vacuum system of turboplant, for instance, after low-pressure heater of main condensate second in direction of main condensate flow and with regulating member installed on flash steam outlet pipeline of atmospheric deaerator of additional feed water.

EFFECT: increased economy and improved reliability of thermal power station.

1 dwg

FIELD: heat power engineering.

SUBSTANCE: proposed thermal power station contains at least one steam turbine with process and heating steam extraction, systems of regenerative and line heaters and station medium steam pressure manifold to which combination evaporator plant with multistage evaporator set, heating steam condensate expander of separate evaporator stages, deaerator of multistage evaporator plant and flashing evaporator plant are connected. Cooler of distillate from expander is placed in water pipeline of deaerator of multistage evaporator plant. Source water pipe-line from end condenser of flashing unit evaporator plant is connected through heater, chemical water cleaning unit and pump, to pressure manifold of makeup water of flashing evaporator plant, multistage evaporator plant and heating system. Pipelines of distillate from expander of multistage evaporator plant and flashing evaporator plant are connected to additional water atmospheric deaerator. Water pipeline from atmospheric deaerator is connected to main condensate line of steam turbine.

EFFECT: increased thermal economy of station.

1 dwg

FIELD: thermal engineering; thermal power stations.

SUBSTANCE: proposed thermal power station operation process is characterized in that source water and heating agent are passed through vacuum deaerator, heated in source water and heating agent heater, and steam bled off the turbine is introduced as heating medium into heating agent. Used as heating medium in source water heater is condensate of heating agent heater.

EFFECT: enhanced economic efficiency and operating reliability of thermal power station.

1 cl, 1 dwg

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