Thermal power station

FIELD: thermal power stations for power generation.

SUBSTANCE: proposed thermal power station has boiler with burner communicating through live-steam pipeline with turbine, the latter communicating with condenser through dead-steam pipeline. Condenser is made in the form of steam-air heat exchanger provided with air admission and air discharge holes. Air-discharge holes are communicating through air duct with suction pipe of boiler air fan.

EFFECT: enhanced economic efficiency of thermal power station.

1 cl, 1 dwg

 

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

Known counterparts - thermal power stations containing the boiler, associated steam line steam to the turbine, which is connected by a steam exhaust steam to the condenser, made in the form of steam-water heat exchanger, which is connected inlet and outlet pipes with the cooling water circuit (see thermal engineering: a Textbook for students of technical colleges //A. M. Arkharov, Isaev, S. M.: engineering. 1986. Is on s, 3.4 on p.150, 9.2 on pages 339 and text clarifications on s-338, 149-150, 339). This analog adopted as a prototype.

The drawbacks and the prototype is the reduced energy and ecological efficiency of thermal power plants due to heat loss of the exhaust steam into the environment and the need for large capital and operating costs on the path of cooling water of the condenser.

The technical result achieved by the present invention is to improve efficiency of thermal power plants due to the useful life of the heat exhaust of the steam turbine cycle thermal power plants and reduce the cost of operation of the cooling circuit of the capacitor.

To achieve the specified technical the definition of the proposed thermal power plant, containing the boiler with a burner associated with live steam pipeline to the turbine, which is connected by a steam exhaust steam to the condenser.

A feature of the inventive station is that the condenser is made in the form of steam-air heat exchanger with air intake and de-aeration holes, and the de-aeration openings of the condenser is connected by a duct with the suction inlet of the blower fan of the boiler.

A new set of features thermal power station allows you to increase the efficiency of thermal power plants by reducing heat loss to the environment and eliminating loop cooling water of the condenser.

The drawing shows the scheme of the new thermal power station.

The station contains the boiler 1 with a burner 2 which is connected by live steam pipeline to the turbine 3, which are connected by a steam exhaust steam to the condenser 4, made in the form of steam-air heat exchanger with air intake 5 and the de-aeration 6 holes. The de-aeration openings 6 of the capacitor 4 are connected by a duct with the suction inlet of the blower fan 7 of the boiler 1. To the turbine 3 is connected to the steam line 8 steam extraction for external customers.

Working of thermal power station is carried out as follows.

In the boiler Ceres burner 2 serves the fuel and air, generated in the boiler 1 steam is directed into the turbine 3. The exhaust turbine steam condense in the condenser 4. The main turbine condensate through the regeneration system of the turbine returns to the boiler 1. As the cooling medium in the condenser 4 uses atmospheric air, which is pumped through the condenser due to the vacuum created by the blower fan, boiler 7, and then heated in the condenser, the air supplied to the boiler 1. Partly in the turbine exhaust steam pipeline selection 8 channel external customers.

Thus, the scheme of the new thermal power station allows you to use the exhaust heat of the steam turbine for preheating the air supplied to the boiler, i.e. allows to increase energy and environmental efficiency of thermal power plants by reducing heat loss to the environment.

Thermal power plant containing a boiler associated with live steam pipeline to the turbine, which is connected by a steam exhaust steam to the condenser, wherein the condenser is made in the form of steam-air heat exchanger with air intake and de-aeration holes, and the de-aeration openings of the condenser is connected by a duct with the suction inlet of the blower fan of the boiler.



 

Same patents:

FIELD: thermal engineering; thermal power stations.

SUBSTANCE: proposed thermal station operating process is characterized in that steam extracted from turbines is passed to low- and high-pressure regenerative heaters wherein full-flow condensate downstream of condenser and feedwater are sequentially heated, then source makeup water is heated upstream of deaerator. Source makeup water is heater upstream of deaerator in low-pressure heater closest to condenser, and regenerative heating of full-flow condensate is started in low-pressure heater second form condenser.

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

1 cl, 1 dwg

FIELD: thermal engineering; power generation.

SUBSTANCE: proposed operating process of thermal power station is characterized in that full-flow condensate is heated in low- and high-pressure regenerative heaters by steam extracted from turbines and back-pressure steam is cooled down in circulating-water turbine condenser. Part of full-flow condensate is additionally heated in heat-pump plant condenser connected in parallel with low-pressure heater second along full-flow condensate path; circulating water heated in turbine condenser is used as low-potential heat source in heat-pump plant.

EFFECT: enhanced economic efficiency of thermal; power station.

1 cl, 1 dwg

FIELD: heat power engineering.

SUBSTANCE: invention can be used in thermal power stations for economic automated control of steam-turbine power-generating units under nominal and sliding pressure conditions. According to invention, regulative valves on lines delivering steam to turbine are kept fully open under all operating conditions of power-generating unit. To change over from one steady-state mode to the other within the limits of rated load, fuel feed regulating valves and feed water regulating valves delivering fuel and water into boiler are acted upon. To change over for load exceeding rated one, regulating valves on lines of steam extraction for regeneration, which are also fully opened, are partially closed. Valves delivering steam to turbine are partially closed for a short period of time when frequency in power supply network deviates from tolerable value, with subsequent return of valves in initial fully open state after setting of frequency within preset limits.

EFFECT: provision of operation of steam-turbine power-generating unit under all loads with minimum losses for steam throttling, materially increased economy of operation.

2 cl, 1 dwg

FIELD: heat power engineering.

SUBSTANCE: proposed thermal power station contains steam turbine with condenser to which cooled and heated circulation water pipelines are connected, and also turbine main condensate pipeline which includes low-pressure regenerative heaters connected to regenerative steam extractions. Heat pump plant evaporator is included into heated circulation water pipeline. Condenser of heat pump plant is connected through heated medium line into main condensate pipeline after first condensate low-pressure regenerative heater in direction of condensate flow in parallel with low-pressure heater of second stage.

EFFECT: improved economy of heat thermal power stations.

1 dwg

FIELD: heat power engineering.

SUBSTANCE: according to proposed method, steam from turbine extractions is fed to regenerative high and low pressure heaters in which main condensate, after turbine condenser, and feed water are heated successively, and primary makeup water is delivered to heat supply system makeup water preparation plant and is deaerated in vacuum deaerator. Primary water is heated in lower low-pressure regenerative heater nearest to condenser before heat supply system makeup water preparation plant, and regenerative heating of main condensate of turbine is started in low-pressure heater, second from turbine condenser.

EFFECT: increased economy and improved reliability of thermal power station owing to heating of primary water to technologically required temperatures by highly economic low-potential extraction of turbine steam at minimum capital layouts for reconstruction of circuit of thermal power station without fitting special primary water heater.

1 dwg

FIELD: heat power engineering.

SUBSTANCE: invention can be used for creating superposed gas-turbine plants to form steam-gas plants in operating thermal power station by equipping it with higher efficiency steam-turbine units. In proposed steam-turbine units regeneration system of steam turbine is partially bypassed with replacement of steam heating of water in this part of regenerative heat exchangers by gas heating. Steam-turbine unit is made in form of higher efficiency unit with bypass of steam turbine high pressure regeneration and part of heating boiler surfaces. Said bypass with included heating surfaces is arranged in convection gas conduit and is connected by its inlet part to part of high-pressure duct of said steam boiler of corresponding parameters. Gas heater of condensate of steam-turbine unit can be installed additionally in separate convection gas conduit in direction of gas flow after surfaces bypassing high pressure regeneration.

EFFECT: simplified design and control of plant, reduced overall dimensions and weight of heating surfaces of separate convection gas conduit at increased power rating of steam-turbine plants.

2 cl, 1 dwg

FIELD: power engineering.

SUBSTANCE: proposed thermal power station has fuel combustion set, tank with fuel, pipelines to feed fuel into furnace chamber, cocks, injectors, furnace chamber, steam turbine and reservoir with droppings connected by pipeline through cock with pipeline delivering fuel into furnace chamber.

EFFECT: improved efficiency of operation of thermal power station.

1 dwg

FIELD: power engineering and refrigerating facilities.

SUBSTANCE: according to proposed method, part of water cooled in tower is cooled in evaporator of absorption lithium bromide refrigerating machine and it is then mixed with main water flow from tower to condenser of power-generating unit. Mechanical draft tower is used for cooling condenser and absorber of refrigerating machine.

EFFECT: reduced temperature in turbine condenser contributing to generation of additional electric energy in interheating periods.

1 dwg

FIELD: power engineering.

SUBSTANCE: in proposed thermal power station containing steam generator, steam turbine, electric generator, and condenser, well tubes are arranged in vertical plane in lower layers of Earth's crust and are made to release thermal energy from lower layers of Earth's crust and receive renewable thermal energy. Tubes of well are installed under sea or ocean bottom in deep water chutes or cracks of Earth's crust or cavities on sea bottom or land. Well tubes can be arranged on sea bottom or land in parallel rows or in form of rectangular rings or spirals, shuttle, stars or radially. Tubes are connected in pairs at angle. Tubes connected to each other form together with pumps, turbine, condenser and deaerator, a closed system. Pump, turbine, generator, vacuum pump are installed on platform under bell housing. Platform is rigidly and hermetically connected with belt housing. Outer surfaces of turbine and condenser are provided with thermal elements of thermoelectric generator. Condenser is combined with platform, being made in form of vertical and horizontal communicating tubes connected with vacuum pump and vacuum regulator. Deaerator is provided with liquid level regulator.

EFFECT: reduced cost and consumption of materials at production of cheap renewable fuel, conversion of heat into electric energy.

8 dwg

FIELD: heat power engineering.

SUBSTANCE: proposed system consists of steam turbine 1, turbogenerator 2 and boiler. Turbine 1 is opened by acting onto valves 4 using governor 3 governor 3 is set into operation under action of centrifugal pendulum 5, electric motor 6, electrohydraulic converter 7 and manual control mechanism 8. Sensor 9 improves sensitivity of system actuating members. System is furnished also with control pressure sensor 10, controllable opening setter 11 of turbine 1, amplifiers 14 and 15, limiter 16 and proportional differential converter 17. To decrease nonlinearity of "frequency-power" curve of tubular 1 system is furnished with division unit 18, pressure sensor 19 is control stage of high-pressure cylinder of turbine 1, pressure sensor 20 before turbine 1 and change-over switch 21.

EFFECT: provision of automatic control of power of generating unit at considerable reduction of dead zone in frequency and nonlinearity of "frequency-power" curve of turbine operating in network.

3 cl, 1 dwg

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

Up!