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Geothermal wellhead power station system and power generation method thereof

A power station and geothermal technology, applied in geothermal energy power generation, geothermal energy systems, heat collectors using groundwater as the working fluid, etc., can solve the problems of inability to fully utilize heat energy in different stages, low energy utilization rate, single utilization method, etc., to achieve High heat utilization efficiency, improved utilization efficiency, and easy installation

Active Publication Date: 2019-04-12
SHANGHAI KAISHAN ENERGY EQUIP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing geothermal power plants have low utilization rate of energy
Existing geothermal power stations need to collect hot water from geothermal wells in different regions for use together. Long-distance transportation will cause heat loss, and the utilization method is single, so it is impossible to fully utilize heat energy in stages

Method used

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  • Geothermal wellhead power station system and power generation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] see figure 1 , the present invention discloses a geothermal wellhead power station system, said geothermal wellhead power station system includes: a second gas-liquid separator 1, a flash tank 2, a third screw expander 3, a fourth screw expander 4, a third power generation machine, the fourth generator, the first ORC system, and the second ORC system; the third generator and the fourth generator can be the same dual-shaft generator 5.

[0032] The first end of the second gas-liquid separator 1 is connected to the third screw expander 3, and the saturated steam enters the third screw expander 3; the third screw expander 3 is connected to the double output shaft generator 5, and the flash tank 2 The pipeline between the fourth screw expander 4.

[0033] The second end of the second gas-liquid separator 2 is connected to the flash tank 2, and the flash tank 2 is connected to the fourth screw expander 4. The high-temperature and high-pressure brine enters the flash tank 2,...

Embodiment 2

[0043] The difference between this embodiment and Embodiment 1 is that in this embodiment, the working medium delivery mechanism (the first working medium delivery mechanism and the second working medium delivery mechanism) is a combined working medium pump, and the combined working medium pump includes at least one A variable frequency pump and at least one fixed frequency pump, each variable frequency pump and fixed frequency pump are connected in parallel.

[0044] In the heat engine stage, start-up stage and partial load conditions, only use variable frequency pumps, or use a combination of part or all variable frequency pumps and part or all fixed frequency pumps; in full load conditions, use variable frequency pumps and fixed frequency pumps The pumps are all on.

[0045] At the same time, the system also includes a second working condition automatic identification module, a second demand calculation module, and a second switching module.

[0046] The second working con...

Embodiment 3

[0051] The difference between this embodiment and Embodiment 1 is that in this embodiment, the condenser is a combined condenser, and the combined condenser (first condenser, second condenser) includes at least one air-cooled condenser and at least one evaporative condenser. Condenser, each air-cooled condenser and evaporative condenser are connected in parallel.

[0052] When the ambient temperature is higher than the first set temperature, the evaporative condenser plays a major role in reducing the condensation temperature of the system. When the ambient temperature is lower than the second set temperature, the air-cooled condenser plays a major role in reducing the condensation temperature of the system.

[0053] In addition, the system further includes a second working condition automatic identification module, a second demand calculation module, and a second switching module.

[0054] The second working condition automatic identification module is used to identify the w...

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PUM

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Abstract

The invention discloses a geothermal well mouth power station system and a power generation method thereof. The power station system comprises a second gas-liquid separator, a flash evaporation tank, a third screw expander, a fourth screw expander, a third generator, a fourth generator, a first ORC system and a second ORC system; a first end of the second gas-liquid separator is connected with the third screw expander; saturated steam enters the third screw expander; the third screw expander is connected with the third generator and a pipeline between the flash evaporation tank and the fourth screw expander; a second end of the second gas-liquid separator is connected with the flash evaporation tank; the flash evaporation tank is connected with the fourth screw expander; high-temperature and high-pressure brine enters the flash evaporation tank; flashed steam is mixed with steam in an outlet of the third screw expander; mixed steam enters the fourth screw expander; the fourth screw expander is connected with the first ORC system; and the flash evaporation tank is connected with the second ORC system. The geothermal well mouth power station system, proposed by the invention, can improve the geothermal utilization efficiency.

Description

technical field [0001] The invention belongs to the technical field of geothermal wellhead power generation, and relates to a geothermal wellhead power station system, in particular to a geothermal wellhead power station system based on an organic Rankine cycle expander; at the same time, the present invention also relates to a power generation method of the geothermal wellhead power station system. Background technique [0002] A geothermal power station is a power station that uses underground hot water, high-temperature rock mass or steam as primary energy. Existing geothermal power plants have a low utilization rate of energy. Existing geothermal power stations need to collect hot water from geothermal wells in different regions and use it together. Long-distance transportation will cause heat loss, and the utilization method is single, which makes it impossible to fully utilize heat energy in stages. [0003] In view of this, there is an urgent need to design a new geo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03G4/00F01C13/00F01K23/02
CPCF01C13/00F01K23/02F03G3/00F24T10/20Y02E10/10
Inventor 汤炎齐井文
Owner SHANGHAI KAISHAN ENERGY EQUIP