CN112066445A - Heating system for exploiting terrestrial heat by combining waste oil well with heat pump - Google Patents
Heating system for exploiting terrestrial heat by combining waste oil well with heat pump Download PDFInfo
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- CN112066445A CN112066445A CN202010892065.7A CN202010892065A CN112066445A CN 112066445 A CN112066445 A CN 112066445A CN 202010892065 A CN202010892065 A CN 202010892065A CN 112066445 A CN112066445 A CN 112066445A
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- Prior art keywords
- heat
- pipe
- oil well
- water
- heating system
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D15/00—Other domestic- or space-heating systems
- F24D15/04—Other domestic- or space-heating systems using heat pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
- F24T10/00—Geothermal collectors
- F24T10/10—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground
- F24T10/13—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground using tube assemblies suitable for insertion into boreholes in the ground, e.g. geothermal probes
- F24T10/17—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground using tube assemblies suitable for insertion into boreholes in the ground, e.g. geothermal probes using tubes closed at one end, i.e. return-type tubes
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
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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
Abstract
The invention belongs to the technical field of heating equipment, and particularly relates to a heating system for exploiting terrestrial heat by combining a waste oil well with a heat pump, which comprises an overground heating system arranged on the ground surface and an underground heat taking system arranged in the waste oil well; the ground heating system comprises a heat pump unit, a water pump, a water inlet pipe, a water outlet pipe, an underground heat taking system, a heat exchange pipe, a heat preservation pipe and a superconductive micro-array heat pipe, wherein the underground heat taking system penetrates through an underground rock layer and a water-bearing layer. The heat exchange pipe is the abandonment oil well pipe wall, and the inside water channel that forms of insulating tube, the annular space between insulating tube and heat exchange pipe forms into water channel through the spiral runner. The superconducting microarray heat pipe is arranged at the bottom of the oil well, and the heat absorption end is embedded into the rock layer. The heat exchange tube is provided with a heat transfer channel at the aquifer, and the pore of the heat transfer channel is cracked and filled with concrete with high heat conductivity coefficient. The system provides powerful guarantee for continuous and efficient heating. The abandoned oil well is transformed into a geothermal well, so that the problem that the abandoned oil well is idle is solved, and good social and economic benefits are achieved.
Description
The technical field is as follows:
the invention belongs to the technical field of heating equipment, and particularly relates to a heating system for exploiting terrestrial heat by combining a waste oil well with a heat pump.
Background art:
with the increase of oil demand and production, the oil yield of oil wells of a plurality of oil fields decreases year by year until the oil wells are exhausted, and the number of scrapped oil wells per year increases year by year. In the oil field survey data of Daqing in 2018, the shut-in exploration well reaches 2486 mouths, wherein the formation temperature is 366 mouths above 90 ℃, and some even reach 130 ℃, so that the method has certain development and utilization values. With the social consensus on energy conservation and emission reduction, geothermal energy has the characteristics of abundant and stable energy source accumulation as a new clean energy source, so that the rational development and utilization of geothermal resources are favored by people. Based on the large background of energy conservation, emission reduction and clean energy utilization, compared with the situation that a well is sealed, the well consumes a large amount of manpower, material resources and financial resources, and is finally idle and useless, whether a system can combine an idle waste oil well with geothermal resources or not to transform the waste oil well into a geothermal well or not can enable the waste oil well to play a role again becomes a starting point of the invention. If the waste oil well can be transformed and utilized to heat various buildings in cities near the waste oil well, the system replaces the traditional heating system with high pollution and high emission, and has huge economic, social and environmental benefits.
The invention content is as follows:
the invention aims to provide a heating system for exploiting geothermal heat by combining a waste oil well with a heat pump, which is used for solving the problems. Aiming at the problem that a large number of abandoned oil wells cannot be scientifically and reasonably reused, the heating system is researched and designed, underground heat energy is provided by the transformed abandoned oil wells to serve the heating of peripheral residential areas or plant areas, the environmental pollution is reduced, the consumption of non-renewable energy sources is reduced, and the system has an excellent heat-taking effect through enhanced heat exchange.
The technical scheme adopted by the invention is as follows: a heating system for exploiting geothermal heat by combining a waste oil well with a heat pump comprises an overground heating system and an underground heat-taking system; the ground heating system is arranged on the ground surface and comprises a heat pump unit, a water pump, a water inlet pipe and a water outlet pipe; the underground heat taking system penetrates through an underground rock layer and an aquifer, the underground heat taking system comprises a heat exchange tube, a heat preservation tube and a superconducting microarray heat pipe, the heat exchange tube is a waste oil well tube, the heat preservation tube is nested in the heat exchange tube, a water outlet channel is formed in the heat preservation tube, an annular space between the heat preservation tube and the heat exchange tube forms a water inlet channel through a spiral flow channel, the water outlet channel is communicated with the water inlet channel at the bottom, the superconducting microarray heat pipe is arranged at the bottom of an oil well and is divided into a heat absorption section and a heat release section, geothermal heat of the heat absorption section is embedded in the rock layer and directly extracted, heat is transferred to the heat release section through the heat pipe effect, fluid reaches the bottom of the oil well through the spiral flow channel and is fully contacted with the; the heat exchange tube is provided with a heat transfer channel in the aquifer, the heat transfer channel is a pore crack, and the pore crack is filled with concrete with high heat conductivity coefficient; the heat transfer channel is formed by irregular pore cracks in the aquifer rock through fracturing technology, perforation and water testing, and concrete with high heat conductivity coefficient is filled in the pores; the outlet of the heat pump unit is connected with the water outlet pipe to the inlet of the water inlet channel, the inlet of the water pump is connected with the water inlet pipe to the outlet of the water outlet channel, and the outlet of the water pump is connected with the inlet of the heat pump unit to form a circulation route; the heat pump unit heats the low-temperature fluid by injecting the low-temperature fluid into the water inlet channel, then the high-temperature water is pumped out by the water pump for heating, and then the used fluid is injected into the underground heat taking system for reheating through the outlet of the heat pump unit, so that a circularly executed heat taking process is formed.
Furthermore, the spiral direction of the spiral flow channel is 45 degrees clockwise, the arrangement of the spiral flow channel separates and divides the water inflow, the flow of the fluid is prolonged, the internal disturbance of the fluid is enhanced, the heat exchange of the fluid is stronger, and the geothermal exploitation is promoted.
Furthermore, the working medium in the heat pipe of the superconducting microarray heat pipe is methanol, the length of the heat pipe is 10 meters, the length of the heat absorption section is 6 meters, the heat absorption section is embedded into a rock layer at the bottom of an oil well, the length of the heat release section is 4 meters, the heat release section is in full contact with fluid, the heat extraction range is expanded, and the heat extraction efficiency is improved.
Further, the heat transfer channel of the heat exchange tube at the aquifer is formed by irregular pore cracks in the aquifer rock through fracturing technology, perforation and water testing.
Furthermore, the high-thermal-conductivity-coefficient concrete is prepared by mixing waste copper slag, basalt, sapphire powder and graphite powder, and the high-thermal-conductivity-coefficient concrete is filled in the pore cracks, so that the heat transfer performance of the heat transfer channel is further improved.
Furthermore, the heat exchange tube is a waste oil well pipe well wall, and the heat preservation tube is a heat preservation and heat insulation tube made of PPR tubes.
Furthermore, the ground heating system is arranged on the ground, the water pump is arranged at the water inlet pipe of the heat pump unit, and the water pump, the water inlet pipe and the heat pump unit are sequentially connected.
Furthermore, the spiral flow channel is arranged to separate and divide the inflow water flow, prolong the flow of the fluid and enhance the internal disturbance of the fluid, so that the heat exchange is stronger and the heat exchange of the heating system is promoted.
The invention has the beneficial effects that: a heating system for exploiting terrestrial heat by using a waste oil well in combination with a heat pump is provided to solve the above problems. Aiming at the problem that a large number of abandoned oil wells cannot be scientifically and reasonably reused, the heating system is researched and designed, underground heat energy is provided by the transformed abandoned oil wells to serve the heating of peripheral residential areas or plant areas, the environmental pollution is reduced, the consumption of non-renewable energy sources is reduced, and the system has an excellent heat-taking effect through enhanced heat exchange.
Description of the drawings:
fig. 1 is a schematic structural diagram of the first embodiment.
The specific implementation mode is as follows:
example one
Referring to fig. 1, a heating system for extracting geothermal heat using a waste oil well in combination with a heat pump includes an above-ground heating system 1 disposed on the ground surface and an underground heat extraction system 2 disposed underground; the spiral flow channel 13, the heat transfer channel 17 and the superconducting microarray heat pipe 11 are arranged underground; the ground heating system 1 is arranged on the ground surface and comprises a heat pump unit 3, a water pump 4, a water inlet pipe 5 and a water outlet pipe 6; the underground heat taking system 2 penetrates through an underground rock stratum 7 and an underground aquifer 8 and comprises a heat exchange pipe 9, a heat preservation pipe 10 and a superconductive micro-array heat pipe 11. The heat exchange pipe 9 is a waste oil well pipe, and the heat preservation pipe 10 is nested in the heat exchange pipe 9; a water outlet channel 12 is formed inside the heat insulation pipe 10, an annular space between the heat insulation pipe 10 and the heat exchange pipe 9 is a water inlet channel 14 formed by a spiral flow channel 13, the water outlet channel 12 is communicated with the water inlet channel 14 at the bottom, and the water inlet channel 14, the water outlet channel 12 and the ground heating system 1 arranged on the ground surface are combined to form a heat taking cycle. The outlet of the heat pump unit 3 is connected with the water outlet pipe 6 to the inlet of the water inlet channel, the inlet of the water pump 4 is connected with the water inlet pipe 5 to the outlet of the water outlet channel, and the outlet of the water pump 4 is connected with the inlet of the heat pump unit 3 to form a circulation route. The heat pump unit 3 heats the low-temperature fluid by injecting the low-temperature fluid into the water inlet channel, then the water pump 4 pumps the high-temperature water for heating, and then the used fluid is injected into the underground heat taking system for reheating through the outlet of the heat pump unit 3, so that a circularly executed heat taking process is formed. The heat transfer channel 17 is an irregular pore crack formed by perforating and testing water in aquifer rock at the aquifer at the two sides of the heat exchange tube by a fracturing technology. The filling of the pores with high thermal conductivity concrete 18 further enhances the heat transfer performance of the heat transfer channels. The superconducting microarray heat pipe 11 is arranged at the bottom of an oil well and is divided into a heat absorption section 15 and a heat release section 16, and the heat absorption section 15 is embedded in a rock layer to directly extract terrestrial heat. Through the action of the heat pipe, heat is transferred to the heat release section 16, and fluid reaches the bottom of the oil well through the spiral flow channel 13 and is fully contacted with the heat release section 16 of the superconducting microarray heat pipe, so that the heat extraction range is expanded, and the heat extraction efficiency is improved.
The outlet of the heat pump unit is connected with the water outlet pipe to the inlet of the water inlet channel, the low-temperature fluid is injected into the water inlet channel formed by the spiral flow channel, and in the process that the low-temperature fluid flows downwards in the spiral flow channel in a shunting manner, the fluid is in contact with the metal wall surface of the heat exchange pipe, so that the heat transferred to the heat exchange pipe by the rock layer and the aquifer around the heat exchange pipe on the metal wall surface and the heat transfer channel filled with the concrete with the high heat conductivity coefficient is. After the rock layer and the water-containing layer are heated, the fluid finally reaches the bottom of the oil well to be collected and is fully contacted with the heat release section of the superconducting micro-array heat pipe, the heat conducted to the heat release section by the heat absorption section of the superconducting micro-array heat pipe inserted into the rock layer at the bottom of the oil well is absorbed, the fluid is further heated and heated, the fluid can absorb more heat, and the heat extraction efficiency of the underground heat extraction system is improved. The high-temperature fluid enters the inlet of the heat pump unit from the outlet of the water outlet channel through the outlet of the water pump for heating. The heat transferred by the underground heat-taking system is continuously extracted by the heating system arranged on the ground, and the heat exchange process can be circularly executed. The whole system well solves the problem of oil well abandonment, changes waste into valuable and efficiently utilizes geothermal resources for heating. The system improves the underground heat extraction efficiency by means of arranging the spiral flow channel and the superconducting microarray heat pipe, adopting a fracturing technology, backfilling high-thermal conductivity coefficient concrete and the like, and provides powerful guarantee for continuous and efficient heating. The system transforms the waste oil well into the geothermal well, solves the problem that the waste oil well is idle, and has good social and economic benefits.
Although the present invention has been described in detail with reference to the specific embodiments, the present invention is not limited to the embodiments. Any equivalent changes and modifications without inventive faculty, which may be made by those skilled in the art without departing from the spirit and principle of the invention, are within the protection scope of the invention.
Claims (6)
1. The utility model provides an utilize waste oil well to combine geothermal heating system of heat pump exploitation which characterized in that: the system comprises an overground heating system (1) and an underground heat taking system (2); the ground heating system (1) is arranged on the ground surface, and the ground heating system (1) comprises a heat pump unit (3), a water pump (4), a water inlet pipe (5) and a water outlet pipe (6); the underground heat taking system (2) penetrates through an underground rock stratum (7) and a water-bearing stratum (8), the underground heat taking system (2) comprises a heat exchange pipe (9), a heat preservation pipe (10) and a superconducting microarray heat pipe (11), the heat exchange pipe (9) is a waste oil well pipe, the heat preservation pipe (10) is embedded in the heat exchange pipe (9), a water outlet channel (12) is formed inside the heat preservation pipe (10), an annular space between the heat preservation pipe (10) and the heat exchange pipe (9) forms a water inlet channel (14) through a spiral flow channel (13), the water outlet channel (12) is communicated with the water inlet channel (14) at the bottom, the superconducting microarray heat pipe (11) is arranged at the bottom of an oil well and is divided into a heat absorption section (15) and a heat release section (16), and the heat absorption section (15; a heat transfer channel (17) is arranged in the aquifer (8) of the heat exchange tube (9), the heat transfer channel (17) is a pore crack, and concrete (18) with high heat conductivity coefficient is filled in the pore crack; the outlet of the heat pump unit (3) is connected with the inlet of the water outlet pipe (6) to the water inlet channel (14), the inlet of the water pump (4) is connected with the outlet of the water inlet pipe (5) to the water outlet channel (12), and the outlet of the water pump (4) is connected with the inlet of the heat pump unit (3) to form a circulation route.
2. The heating system for extracting geothermal heat by using the waste oil well in combination with the heat pump as set forth in claim 1, wherein: the spiral direction of the spiral flow channel is 45 degrees clockwise, the arrangement of the spiral flow channel separates and divides the water inflow, the flow of the fluid is prolonged, the internal disturbance of the fluid is enhanced, the heat exchange of the fluid is stronger, and the geothermal exploitation is promoted.
3. The heating system for extracting geothermal heat by using the waste oil well in combination with the heat pump as set forth in claim 1, wherein: the working medium in the heat pipe of the superconducting microarray heat pipe (11) is methanol, the length of the heat pipe is 10 meters, the length of the heat absorption section (15) is 6 meters, the heat absorption section is embedded into a rock layer at the bottom of an oil well, the length of the heat release section (16) is 4 meters, the heat release section is fully contacted with fluid, the heat extraction range is expanded, and the heat extraction efficiency is improved.
4. The heating system for extracting geothermal heat by using the waste oil well in combination with the heat pump as set forth in claim 1, wherein: the heat transfer channel (17) of the heat exchange tube (9) at the aquifer is used for forming irregular pore cracks in the aquifer rock through fracturing technology, perforation and water testing.
5. The heating system for extracting geothermal heat by using the waste oil well in combination with the heat pump as set forth in claim 1, wherein: the high-thermal-conductivity-coefficient concrete (18) is prepared by mixing waste copper slag, basalt, sapphire powder and graphite powder, and the high-thermal-conductivity-coefficient concrete (18) is filled in the pore cracks, so that the heat transfer performance of the heat transfer channel is further improved.
6. The heating system for extracting geothermal heat by using the waste oil well in combination with the heat pump as set forth in claim 1, wherein: the heat exchange pipe (9) is a well wall of a waste oil well pipe, and the heat preservation pipe (10) is a heat preservation and heat insulation pipe made of a PPR pipe.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010892065.7A CN112066445A (en) | 2020-08-31 | 2020-08-31 | Heating system for exploiting terrestrial heat by combining waste oil well with heat pump |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010892065.7A CN112066445A (en) | 2020-08-31 | 2020-08-31 | Heating system for exploiting terrestrial heat by combining waste oil well with heat pump |
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| CN112066445A true CN112066445A (en) | 2020-12-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117190515A (en) * | 2023-10-24 | 2023-12-08 | 河南省地质研究院 | Geothermal resource utilization system of abandoned well |
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| CN101876487A (en) * | 2009-11-10 | 2010-11-03 | 武汉理工大学 | Method for manufacturing prefabricated concrete heat storage module for solar heat power generation |
| CN203615452U (en) * | 2013-10-18 | 2014-05-28 | 中冶集团武汉勘察研究院有限公司 | Heat supply device for transforming waste oil well into heat source well of ground source heat pump |
| CN208205482U (en) * | 2018-03-22 | 2018-12-07 | 吉林大学 | A kind of enhanced heat-exchange system of mid-deep strata geothermal ground |
| CN209801840U (en) * | 2019-03-08 | 2019-12-17 | 陕西省煤田地质集团有限公司 | Middle-deep geothermal energy enhanced heat taking device |
| US20200011573A1 (en) * | 2018-07-04 | 2020-01-09 | Peter Samuel Winston Graham | Geothermal system operable between heat recovery and heat storage modes |
| CN111023883A (en) * | 2019-12-24 | 2020-04-17 | 珠海格力电器股份有限公司 | Heat exchange tube and heat exchanger that heat exchange efficiency is high |
| CN210624982U (en) * | 2019-09-26 | 2020-05-26 | 王鹏 | Geothermal well micro heat pipe heat exchange system |
| CN211177029U (en) * | 2019-11-28 | 2020-08-04 | 陕西省煤田地质集团有限公司 | Heating system with mode of taking heat and not taking water by using geothermal energy in middle and deep layers |
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2020
- 2020-08-31 CN CN202010892065.7A patent/CN112066445A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101876487A (en) * | 2009-11-10 | 2010-11-03 | 武汉理工大学 | Method for manufacturing prefabricated concrete heat storage module for solar heat power generation |
| CN203615452U (en) * | 2013-10-18 | 2014-05-28 | 中冶集团武汉勘察研究院有限公司 | Heat supply device for transforming waste oil well into heat source well of ground source heat pump |
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| CN209801840U (en) * | 2019-03-08 | 2019-12-17 | 陕西省煤田地质集团有限公司 | Middle-deep geothermal energy enhanced heat taking device |
| CN210624982U (en) * | 2019-09-26 | 2020-05-26 | 王鹏 | Geothermal well micro heat pipe heat exchange system |
| CN211177029U (en) * | 2019-11-28 | 2020-08-04 | 陕西省煤田地质集团有限公司 | Heating system with mode of taking heat and not taking water by using geothermal energy in middle and deep layers |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117190515A (en) * | 2023-10-24 | 2023-12-08 | 河南省地质研究院 | Geothermal resource utilization system of abandoned well |
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Application publication date: 20201211 |