SU1740703A1 - Thermoelectric plant - Google Patents

Abstract

The invention relates to a power system and can be applied to combined heat and power plants (CHP), containing boilers with a gas cleaning system, including devices for irrigating flue gases, and condensers with water cooling of tube bundles and further use of water in the public utility system. The purpose of the invention is to increase environmental cleanliness and reduce the cost of flue gas cleaning, which is achieved by introducing an electrochemical water separation unit into an electropneumatic hydraulic circuit of a CHP plant to produce concentrated saline water used to irrigate flue gases in a CHP gas cleaning system. 1 il.

Description

FIELD OF THE INVENTION The invention relates to a power system and a public utility and can be used in thermal power plants.

The purpose of the invention is to increase environmental cleanliness and reduce the cost of flue gas cleaning.

The drawing shows a schematic diagram of a combined heat and power plant.

The combined heat and power plant comprises a boiler 1 connected by pipeline 2 to a device 3 for irrigating flue gases and a turbine 4, the latter is connected to an electric generator 5 including a gas-oil-cooling system and cooling water pipelines. In series, the turbine is connected to a condenser 6 containing two tube bundles, a condensate pump 7, low pressure regenerative heaters 8, a deaerator 9. a feed pump 10 and

11 high pressure regenerative heaters (LDPE).

The piping 12-14 of the turbine tapping is connected to the heater 11, the consumers 15, the peak boiler 16, the heaters 8 and the network heaters 17 and 18, respectively. One tube bundle of condenser 6 through the circulation pump 19 is connected through cooling water to the cooler 20, as well as through the waste water discharge pipe 21 and the valve 22 with the cooler 20, the waste water discharge pipe 21 through the gas-oil cooling system 23 of the generator 5, the heated water pipe 24, the heater 25, the water treatment plant 26 27 is connected to the vapor space of the condenser 6. The apparatus 26 and pump 28 are connected by a conduit 29 with mains water path 30, mounted on kotorbm network heaters 17 and 18, network 31, pumps, hot water peak

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ABOUT

the boiler 32, the peak boiler 16 and the water heater 33. The cold water main through valve 34 is connected to the air space of the cooler 20 by breaking the stream, and the pipeline 35, the electrochemical separation unit 36, purification structures 37 and storage tanks 38 are connected with consumers 39 drinking water and through a water heater 33 - with 40 hot water consumers.

The second tube bundle of the condenser 6 is connected to the cold water main by the pressure pipe 41, and the heated water drain pipe 24 is connected to the cold water line between the regulator valve 42 and the electrochemical separation device 36, which is connected to the flue irrigation device 43 by pipe 43. gases,

The consumer 44 of industrial water is connected to the pipeline 24 of the heated water of the first tube bundle of condenser 6, the cold water main is connected via a filter 45 to a water supply source.

Cogeneration works as follows.

The combustible fuel in boiler 1 gives off heat to the formation of steam sent to the turbine 4, and the flue gases enter the gas cleaning system, where, oxidized and later sorbed by alkaline components, are purified from sulfur oxides and nitrogen. Steam from turbine 4 is partially taken up for regeneration, steam supply to consumers and heat. The exhaust steam enters the condenser 6. Cold water from the line through the valve 34 is supplied with a jet break to the cooler 20, and from it a circulation pump 19 to the tube bundle of the condenser b, where it is heated by the exhaust steam. After that, the water through the discharge pipelines 24 of the circulation system, as well as through the gas-oil-cooling systems of the generator 5, is directed to the water treatment unit 26 and to the consumer 44 of the heated process water. Cold water from the pipeline through conduit 41 through the second bundle of condenser 6, heated in it with the heat of exhaust steam, through conduit 24 of heated water and conduit 35 is directed through the apparatus

Electrochemical separation, partially cleared, cleared of anions and partially disinfected, goes to the treatment plant.

37, then to the storage tanks 38 and then to the consumer 39 of drinking water, and after heating in the water heater 33, the consumer 40 is supplied with hot water. In order to maintain the water temperature within the prescribed limits, both in the apparatus 36 for electrochemical separation and in the treatment plant

37, cold water is mixed in from the main through the regulator valve 42. From the water heater 33, the network water is supplied by the network pump 31 for subsequent heating to the network heaters 17.18, peak water boilers 32, peak boiler 16 and again to the water heater 33 ,

Cold water from the water supply source enters the main through filters 45.

Use concentrated like

alkaline and acidic waters in the gas cleaning system allows to reduce the consumption of reagents for gas cleaning and neutralization of wastewater, as well as improve the environmental cleanliness of the heat and power plant,

Claims (1)

The invention includes a combined heat and power plant including a boiler with a gas cleaning system including a device for irrigating flue gases as well as a tube bundle condenser, one of which is connected to the cold water main through the treatment plant and storage tanks to the cold and hot consumer. drinking water, characterized in that, in order to increase environmental cleanliness and reduce the cost of flue gas cleaning, it additionally contains an apparatus for electrochemical separation of water with an outlet for concentrated saline water, installed between the exit from the condenser tube bundle and the sewage treatment plant and connected with its outlet through the concentrated saline water to the device for irrigation of flue gases.