CN103821678B - Geothermal power generation method by artificial karst cave - Google Patents
Geothermal power generation method by artificial karst cave Download PDFInfo
- Publication number
- CN103821678B CN103821678B CN201210494759.0A CN201210494759A CN103821678B CN 103821678 B CN103821678 B CN 103821678B CN 201210494759 A CN201210494759 A CN 201210494759A CN 103821678 B CN103821678 B CN 103821678B
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- China
- Prior art keywords
- stratum
- karst cave
- power generation
- circulating liquid
- artificial
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- 238000010248 power generation Methods 0.000 title claims abstract description 11
- 238000000034 method Methods 0.000 title claims description 6
- 239000007788 liquid Substances 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000002347 injection Methods 0.000 claims abstract description 5
- 239000007924 injection Substances 0.000 claims abstract description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 22
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 18
- 239000000243 solution Substances 0.000 claims description 15
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 11
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical group Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 8
- 239000011780 sodium chloride Substances 0.000 claims description 6
- 238000000605 extraction Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 description 5
- 230000005611 electricity Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hcl hcl Chemical compound Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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- Engine Equipment That Uses Special Cycles (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The system aims to overcome the technical bottlenecks that the pressure of injected water is high, circulating water cannot be fully heated, the development efficiency is low and the like in geothermal power generation. Soluble stratum is selected in the underground deep layer, dissolving liquid circulates in the stratum to form a karst cave, and then the huge volume of the artificial karst cave is utilized to fully heat the circulating liquid and reduce the water injection pressure, so that the geothermal energy development efficiency and the comprehensive utilization efficiency are improved.
Description
Belongs to the technical field of:
the invention relates to the field of geothermal energy power generation, and aims to improve the exploitation efficiency of geothermal energy.
Background art:
geothermal energy will likely become an important component of future energy sources. However, the geothermal energy generally has low power generation efficiency and low comprehensive utilization rate at present, which is a technical bottleneck restricting the geothermal power generation industry.
The invention content is as follows:
the invention aims to improve the efficiency of geothermal energy power generation. The method is to select a dissolvable stratum in the deep underground layer①By dissolving the solution②Circularly dissolving the stratum to form a karst cave after the target stratum is dissolved, and injecting and extracting a circulating liquid from the karst cave③So as to utilize the geothermal energy brought by the circulating liquid to generate electricity. The invention mainly achieves the aim of increasing the development efficiency of geothermal energy by the huge volume of the underground artificial karst cave, which is convenient for fully heating the circulating liquid. (see the attached drawing)
And annotating:
dissolving the formation: the main components of the stratum are sodium chloride (NaCL) or calcium carbonate (CaCO3) and other strata which are easily dissolved by water or other solutions.
Dissolving solution: the solution for dissolving the main component of the target stratum, such as sodium chloride (NaCL) stratum is water, and the solution for calcium carbonate (CaCO3) stratum is hydrochloric acid (HCl).
③ circulating the liquid: the geothermal liquid is taken out by circulation, and the composition of the geothermal liquid is water or other liquid which is convenient for exploiting the geothermal heat.
The technical scheme adopted by the patent for solving the technical problem is as follows:
in order to solve the problems that the injection water pressure is large, circulating water cannot be fully heated, the geothermal development efficiency is low, the comprehensive utilization rate is low and the cost is high in geothermal development, the technical scheme of the invention is as follows: the karst cave is artificially manufactured on an underground target layer, the circulating liquid is fully heated through the huge volume of the underground artificial karst cave, and the pressure of injected water can be reduced at the same time, so that the geothermal energy power generation and comprehensive utilization efficiency are improved.
Description of the drawings:
flow diagram of artificial karst cave geothermal power generation method
A water recovery well; a heat exchanger; a ground generator set; a cooling device; a pump; a reinjection well;
the specific implementation mode is as follows:
the method is to select a dissolvable stratum in the deep underground layer①By dissolving the solution②Circularly dissolving the stratum to form a karst cave after the target stratum is dissolved, and injecting and extracting a circulating liquid from the karst cave③So as to utilize the geothermal energy brought by the circulating liquid to generate electricity. The geothermal energy development efficiency is increased.
And annotating:
dissolving the formation: the stratum is mainly composed of sodium chloride (NaCL) or calcium carbonate (CaCO3) and the like, and the stratum is easily dissolved by water or other solutions.
Dissolving solution: for example, the solution for dissolving the target formation is water as the solution for sodium chloride (NaCL) formation and hydrochloric acid (HCl) as the solution for calcium carbonate (CaCO3) formation.
③ circulating the liquid: the geothermal liquid is taken out by circulation, and the composition of the geothermal liquid is water or other liquid which is convenient for exploiting the geothermal heat.
Claims (1)
1. An artificial karst cave geothermal power generation method is characterized in that: comprises the following steps of (a) carrying out,
(1) selecting a dissolvable stratum in the deep underground layer, wherein the stratum mainly comprises sodium chloride (NaCL) or calcium carbonate (CaCO 3);
(2) circularly dissolving the stratum by using a dissolving solution to form an artificial karst cave communicating an injection well and a production well after the target stratum is dissolved, wherein the solution can dissolve the main component of the target stratum, the dissolving solution of a sodium chloride (NaCL) stratum is water, and the dissolving solution of a calcium carbonate (CaCO3) stratum is hydrochloric acid (HCl);
(3) circulating liquid is injected into and extracted from the karst cave, so that geothermal power generated by the circulating liquid is utilized, the circulating liquid is pumped into an injection well to an artificial karst cave by a pump, the circulating liquid heated by the artificial karst cave is pumped into a heat exchanger after being extracted by an extraction well, and is pumped into the injection well by the pump after heat exchange, and primary closed circulation is carried out; and the second-stage closed organic working medium is heated by the heat exchanger, and the vapor of the organic working medium after being heated and boiled enters a ground generator set to realize power generation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210494759.0A CN103821678B (en) | 2012-11-19 | 2012-11-19 | Geothermal power generation method by artificial karst cave |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210494759.0A CN103821678B (en) | 2012-11-19 | 2012-11-19 | Geothermal power generation method by artificial karst cave |
Publications (2)
| Publication Number | Publication Date |
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| CN103821678A CN103821678A (en) | 2014-05-28 |
| CN103821678B true CN103821678B (en) | 2021-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210494759.0A Active CN103821678B (en) | 2012-11-19 | 2012-11-19 | Geothermal power generation method by artificial karst cave |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5263322A (en) * | 1992-04-15 | 1993-11-23 | Molini Alberto E | Method of recovering energy from liquids in deep cavities |
| CN2606868Y (en) * | 2003-01-09 | 2004-03-17 | 何满潮 | A Geothermal Water Exploitation and Recharge System |
| CN102191932A (en) * | 2011-04-08 | 2011-09-21 | 太原理工大学 | In-situ heat injection steeping control aqueous dissolution exploitation method of glauberite ore |
| CN102425870A (en) * | 2011-12-26 | 2012-04-25 | 中国科学院地质与地球物理研究所 | An integrated method for improving geothermal recharge rate and CO2 geological storage |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7857396B2 (en) * | 2008-06-17 | 2010-12-28 | Pinnacle Potash International, Ltd. | Method and system for solution mining |
| CN101482101A (en) * | 2008-12-22 | 2009-07-15 | 杨贻方 | Geothermal power generation apparatus |
| CN102155187A (en) * | 2011-03-22 | 2011-08-17 | 上海宏睿油气田径向井技术服务有限公司 | Method for treating coal bed bottom plate karst water through hydraulic jetting and radial drilling |
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2012
- 2012-11-19 CN CN201210494759.0A patent/CN103821678B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5263322A (en) * | 1992-04-15 | 1993-11-23 | Molini Alberto E | Method of recovering energy from liquids in deep cavities |
| CN2606868Y (en) * | 2003-01-09 | 2004-03-17 | 何满潮 | A Geothermal Water Exploitation and Recharge System |
| CN102191932A (en) * | 2011-04-08 | 2011-09-21 | 太原理工大学 | In-situ heat injection steeping control aqueous dissolution exploitation method of glauberite ore |
| CN102425870A (en) * | 2011-12-26 | 2012-04-25 | 中国科学院地质与地球物理研究所 | An integrated method for improving geothermal recharge rate and CO2 geological storage |
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| Publication number | Publication date |
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| CN103821678A (en) | 2014-05-28 |
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