SU1638360A1 - Power plant for geothermal power station - Google Patents

Abstract

The invention relates to the power industry, in particular, to devices for the production of electrical energy, and can be used in the design and operation of a geothermal power plant using water with high salinity and non-condensable gas content. The purpose of the invention is to increase the efficiency and reliability of the geothermal power plant. For a deeper degassing of the geothermal water, the degasser 1 is made multistage and the boiling water is provided in its upper part, the sludge separator 4 is installed after the evaporator 2. To improve the quality of the steam supplied to the turbine 11, a steam flushing device 3 is used, into which condensate preheated first is fed the heat of the brine released from the sludge separator 4, then the heat of the vapor from the degasser 1 and last of all the combustion products of the combustible part of the gases separated from the geothermal water s in the degasser 1. To prevent the geothermal water from being saturated with oxygen, part of the combustion products from the economizer 18, which prevents the contact of water with atmospheric air, is directed to the upper part of the sludge separator 4. To prevent overgrowth of the underground circulation system, the return water to the reservoir is pre-acidified in the rectifier 6 with carbon dioxide released in the degasser 1. To reduce the external water consumption and load on the pump 24 to pump the waste water into the reservoir, it is necessary to feed the condenser 14 of the condenser 12 with a part of condensate turbines 11. 1 z.p. f-ly. 1 il. fe about with with oj about about

Description

The invention relates to power engineering, in particular, to devices for the production of electrical energy, and can be used in the design and operation of a geothermal power plant using a thermal brine.

The purpose of the invention is to increase efficiency and reliability.

The drawing shows a diagram of the proposed power plant for a geothermal power plant.

The device contains a multistage degasser 1 connected in series with separate removal of combustible and non-combustible gases, an evaporator2 with a steam washer 3, a sludge separator 4, a heat exchanger 5 and a carbonizer 6. Decontaminant 1 is connected to a geothermal well (not shown} by pipeline 7. Removal of combustible gases from a degasser 1 is carried out via pipeline 8, non-combustible through pipeline 9. degassed water through pipeline 10. Steam turbine 11 is connected to an evaporator 2 and a condenser 12, which is connected to a heat exchanger 5 lin 13. The cooling circuit of the condenser 12 contains the cooling tower 14 and the pump 15. The system feeds the cooling water through pipe 16. A steam-water heat exchanger 17 and an economizer 18 are connected in series between the heat exchanger 5 and the steam-washing device 3 to heat a portion of the condensate washing. The heat exchanger is connected to a multistage degasser t by pipe 9 "with a re-carbonizer b by pipe 19. The separator 20 of the liquid and the combustion chamber 21 and the gas outlet are connected to the sludge separator 4. 8 to provide heat to the consumer 22 connected to the heat exchanger 5 by the heated condensate supply line 23 and to the carbonate 6. The latter is connected to an injection well (not shown) through the injection pump 24, with the heat exchanger 17 - the pipeline 19 and with the heat exchanger 5 - the pipelines 25 and 26.

The installation works as follows

The initial geothermal water enters the multistage degasser 1, in the lower part of which, due to a decrease in pressure, the main part of combustible gases is released, which is discharged through pipeline 8. In the upper part of the degasser 1, the water pressure is maintained below the saturation pressure, resulting in an intensive decomposition of bicarbonated with the formation of a solid phase - calcium carbonate. The carbon dioxide and steam released in this case is discharged through conduit 9. The degassed and decarbonated water enters conduit 10 to evaporator 2, and then to sludge separator 4, where sludge separates, and through heat exchanger 5 to rebaronizer 6 in the evaporator 2, the steam enters the steam-flushing device 3, from where it is fed to the turbine 11. The exhaust steam is directed to the condenser 12. The condensate formed enters the heat exchanger 5 to preheat

the heat of the clarified brine from the sludge separator 4. Part of the condensate is fed through line 16 to cooling tower 14 to feed the condenser cooling system. A portion of the condensate heated in the heat exchanger 5 is fed through line 23 to the consumer 22 of low-grade heat, from where it enters the carbonate 6. The amount of water and heat supplied to the consumer 22 is provided

the recirculation of part of the water through the pipeline 26. Another part of the condensate is directed through the heat exchanger 17 to the steam cleaner in the device 3. In the heat exchanger 17, the condensate is heated by evaporation, which is supplied through the pipeline 9 from the degasser 1. Condensed steam and carbon dioxide from the heat exchanger 17, the conduit 19 is directed to the re-carbonizer 6 to acidify the water injected into the well. The acidified water is directed to a pump 24 for injection into a subterranean formation. In a water economizer 18, the condensate aimed at steam cleaning is heated by flue gases formed by burning combustible gases in the combustion chamber 21, where they are supplied from the degasser 1 through the liquid separator 20. A portion of the exhausted gases from the water economisation of the miser 18 is directed to the sludge separator 4 to create a gas cushion preventing oxygen from contaminating the water.

Claims (1)

Claim 1, A power plant for a geothermal power plant comprising a degasser in series with discharges of combustible and non-combustible gases, an evaporator, a steam turbine plant with a generator and a condenser, and a sludge separator, which is also equipped with additional energy efficiency and reliability. a carbonation tank with an injection pump, two heat exchangers, water The economizer and the path for the use of the heat exchanger are connected to the condensation of the heat of combustible gases, connected, and the outlet of the water economizer to the solenoids at the inlet to the degasser and the evaporator that is installed in the washer and in series heat exchangers connecting the liquid, the combustion chamber and the heating chamber to the sludge separator and to the outlet of it, the cavity of the water economizer with the gas exhaust gas degasser, respectively, and the exhaust gas into the sludge separator, and The subcontractor is made with steam and steam to the outlets of the heating media from the heat exchange device, with both the heat exchangers and the heated medium leaving the water economizer being connected to the next 10 heat exchanger, respectively, along the heated medium between 2. Installation according to Claim 1, characterized by a condenser and steam-flushing device, in which the degasser and the evaporator are operated by an evaporator, the input being perogoneny multistage.