A hands-free method for utilizing low-temperature geothermal fluid and a geothermal energy extraction device

An extraction device, geothermal energy technology, applied in geothermal energy power generation, heat collectors without external energy operation, etc., can solve problems such as thermal pollution, heat loss, geothermal fluid loss, etc., and achieve the effect of convenient use

Active Publication Date: 2020-12-15
东营市庄溶生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. The heat energy utilization rate of geothermal fluid is very low, generally only about 30%, and a large amount of heat is lost on the surface, causing thermal pollution and affecting the ecological balance of the surrounding surface
[0005] 2. Although the regulatory department has clearly ordered the recharge, due to geological conditions, recharge costs, etc., it cannot be re-injected into the thermal storage fluid layer, and most of it can only be re-injected into the surface water system
[0006] 3. A large amount of geothermal fluid is extracted, which directly causes a large loss of geothermal fluid. Geothermal fluid is non-renewable, so this heat extraction method is unsustainable
[0007] 4. As a large amount of geothermal fluid is pumped to the ground, the accompanying substances in the fluid: radioactive elements such as uranium, thorium, boron, and ammonia that are decaying or still decaying, also follow the ground and enter the surface water system, causing environmental pollution. question

Method used

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  • A hands-free method for utilizing low-temperature geothermal fluid and a geothermal energy extraction device

Examples

Experimental program
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Effect test

Embodiment 1

[0049] Take the extraction of geothermal energy at 60 degrees Celsius (up and down 5 degrees Celsius) in a geothermal well as an example, according to the above analysis, adjust the composition ratio of the thermal working medium, that is, dimethoxymethane:diethoxyethane is (5-20 ): (1-4) Among them, the components whose phase transition temperature is lower than 60°C in methoxymethane account for the main part. After the two are mixed, some components with a phase transition temperature higher than 60°C, such as methoxyethoxy ether, will be formed, so the phase transition temperature of the mixture can be adjusted at about 60°C.

Embodiment 2

[0051] Extract geothermal energy at 80 degrees Celsius (up and down 5 degrees Celsius) in the geothermal well, the situation is similar to that of Example 1, the phase transition temperature is lower than 80 degrees Celsius, and the mass ratio of methoxymethane:diethoxyethane For (4-20): (1-5).

Embodiment 3

[0053] To extract the geothermal energy at 90 degrees Celsius (up and down 5 degrees Celsius) in the geothermal well, the phase transition temperature is lower than 80 degrees Celsius. The main part, the mass ratio of methoxymethane:diethoxyethane is (3-20): (1-6).

[0054] Once the phase change occurs, the transmission speed will be very fast, but the geothermal fluid can only exchange heat with the working fluid through the wall of the working fluid tube, so the actual ratio of methoxyethoxy ether should be determined according to the gas phase density. Adjustment.

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Abstract

The invention relates to a hand-free type low-temperature geothermal fluid using method and a geothermal energy extracting device. Mixed liquid of composite dimethoxymethane and composite diethoxyethane serves as a heat taking working medium, through gas and liquid phase change of the heat taking working medium, geothermal energy is extracted, and geothermal energy use is achieved through the heatexchange manner; when shallow geothermal energy with the relatively low temperature is collected and used, the problem of heat exchanger deep burying and geothermal fluid reinjection can be solved, and the project investment, maintenance operation and energy consumption cost of a ground source heat pump system can be reduced.

Description

technical field [0001] The invention relates to the technical field of geothermal energy collection, and relates to a hands-free method for utilizing low-temperature geothermal fluid and a geothermal energy extraction device, specifically referring to the use of the "liquid-steam" phase transition of the heating medium to convert medium and low temperature "geothermal energy" It is a technology for continuous extraction from underground to rational development and utilization on the ground. Background technique [0002] Geothermal energy refers to the heat energy stored inside the earth. It comes from the heat energy released when the earth's molten magma and radioactive elements decay and the heat energy radiated by the sun. The heat energy generated by the balance of these two major heat sources. The temperature below ten meters to two hundred meters underground is basically constant. [0003] At present, for the stable extraction of geothermal energy, the temperature of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24T10/40
CPCY02E10/10
Inventor 马锐霍云奎张敏
Owner 东营市庄溶生物科技有限公司
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