CN110131780A - A kind of underground heat individual well is thermally conductive plus the full well section of convection current takes hot systems - Google Patents

A kind of underground heat individual well is thermally conductive plus the full well section of convection current takes hot systems Download PDF

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Publication number
CN110131780A
CN110131780A CN201910355853.XA CN201910355853A CN110131780A CN 110131780 A CN110131780 A CN 110131780A CN 201910355853 A CN201910355853 A CN 201910355853A CN 110131780 A CN110131780 A CN 110131780A
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CN
China
Prior art keywords
well
heat
thermally conductive
insulating tube
convection current
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910355853.XA
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Chinese (zh)
Inventor
卜宪标
王令宝
李华山
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Guangzhou Institute of Energy Conversion of CAS
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Guangzhou Institute of Energy Conversion of CAS
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Publication date
Application filed by Guangzhou Institute of Energy Conversion of CAS filed Critical Guangzhou Institute of Energy Conversion of CAS
Priority to CN201910355853.XA priority Critical patent/CN110131780A/en
Publication of CN110131780A publication Critical patent/CN110131780A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24DDOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D15/00Other domestic- or space-heating systems
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24DDOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00Details
    • F24D19/008Details related to central heating radiators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24TGEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
    • F24T10/00Geothermal collectors
    • F24T10/10Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground
    • F24T10/13Geothermal 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
    • F24T10/17Geothermal 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
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/10Geothermal energy

Abstract

The invention discloses a kind of underground heat individual well is thermally conductive plus the full well section of convection current takes hot systems, including taking heat heating component and the hot component of underground mining, the hot component of underground mining includes geothermal well and the insulating tube that is arranged in the middle part of geothermal well, geothermal well uses the metal borehole wall, the inside of insulating tube forms exhalant canal, annular space between insulating tube and the metal borehole wall forms intake tunnel, and the metal borehole wall is equipped with upper screen and lower screen in the part of aqueous heat reservori.The present invention can reasonable distribution pit shaft and aqueous heat reservori fluid flow, and aqueous heat reservori exists simultaneously the hydrostatic pressure on top and the swabbing action of bottom, it can guarantee the driving force of recharge, the thermally conductive and lower part heat convection for passing through top rock simultaneously, realizes that full well section takes heat, greatly improves individual well and take heat, it avoids and beats inverted well, and take heat to be greater than individual well closing and take heat, the Land use systems of the few geothermal well of water yield have been widened, investment risk is reduced.

Description

A kind of underground heat individual well is thermally conductive plus the full well section of convection current takes hot systems
Technical field
The present invention relates to geothermal heating system technologies, and in particular to a kind of underground heat individual well is thermally conductive plus the full well section of convection current takes hot systems.
Background technique
Northern China haze is serious, and heat supply in winter has further aggravated haze, needs at present to clean energy resource heating technology Ask urgent.Geothermal energy is increasingly taken seriously in the heating of the north as a kind of clean energy resource.But implement at present in geothermal heating system It is faced with geothermal exploration in the process and drilling cost is high, the big problem of risk.Especially when fetching water heat type geothermal well, often occur The few geothermal well of water yield, such case increase the investment risk of enterprise, hinder the quick of geothermal heating system to a certain extent Large-scale promotion.The geothermal well few for the water yield got has been discarded unfortunately, if to draw water utilization, it is necessary to return again Well is filled, the investment payback time is increased.It is also a kind of scheme using the few geothermal well of individual well closed circulation utilization water yield, but the party Case individual well power output is small, and the investment payback time is also longer.
Summary of the invention
To avoid beating inverted well again, and the power output of the few geothermal well of water yield is improved, the invention proposes a kind of underground heat lists Well is thermally conductive plus the full well section of convection current takes hot systems.
To achieve the above object, the technical solution of the present invention is as follows:
A kind of underground heat individual well is thermally conductive plus the full well section of convection current takes hot systems, including takes heat heating component and hot group of underground mining Part, described that heat heating component is taken to be arranged at earth's surface, the hot component of underground mining includes through the tight rock that underground is arranged in Layer and the geothermal well of aqueous heat reservori and the insulating tube being arranged in the middle part of geothermal well, the geothermal well is using the metal borehole wall, institute The well head and shaft bottom, the metal borehole wall for stating insulating tube connection geothermal well are sieved in the part where aqueous heat reservori equipped with top The inside of pipe and lower screen, the insulating tube forms exhalant canal, and the annular between the insulating tube and the metal borehole wall is empty Between form intake tunnel.
Further, described to take heat heating component include heat pump unit, injection pump and immersible pump, the immersible pump setting It in the exit of exhalant canal, and is dipped under the hydrostatic level in exhalant canal, the injection pump is connected to entering for intake tunnel At mouthful, the immersible pump, heat pump unit and injection pump are sequentially connected.
Further, filter is additionally provided between the injection pump and the entrance of intake tunnel.
Further, flow plug is equipped in the intake tunnel between the upper screen and lower screen.
Further, the flow plug is equipped with multiple through-holes.
Further, the insulating tube is using insulating tube made of PPR pipe.
Compared with the prior art, the invention has the following advantages:
It 1, can be with the fluid flow of reasonable distribution pit shaft and aqueous heat reservori by the effect of flow plug;
2, aqueous heat reservori exists simultaneously the hydrostatic pressure on top and the swabbing action of bottom, it is ensured that the driving of recharge Power;
3, by the heat convection of the aqueous heat reservori in thermally conductive and lower part of top lithosphere, realize that full well section takes heat, substantially It improves individual well and takes heat;
4, it avoids and beats inverted well, and take heat to be greater than individual well closing and take heat, widened the benefit of the few geothermal well of water yield With mode, investment risk is reduced.
Detailed description of the invention
Fig. 1 is the thermally conductive structural schematic diagram for adding the full well section of convection current to take hot systems of underground heat individual well;
Description of symbols: 1, heat pump unit;2, injection pump;3, tight rock layer;4, the metal borehole wall;5, hydrostatic level;6, Immersible pump;7, insulating tube;8, upper screen;9, flow plug;10, aqueous heat reservori;11, lower screen;12, filter.
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real Applying mode, the present invention is described in further detail.
Embodiment
As shown in Figure 1, a kind of underground heat individual well is thermally conductive plus the full well section of convection current takes hot systems, including take heat heating component and ground Under adopt hot component, take heat heating component be arranged at earth's surface, the hot component of underground mining include geothermal well and be arranged in geothermal well The insulating tube 7 in portion, insulating tube 7 are made of PPR pipe, geothermal well need penetratingly under tight rock layer 3 and tight rock Aqueous heat reservori 10 under layer 3, that is to say, that need completely through the thickness for covering aqueous heat reservori 10, go directly another fine and close rock Rock layers 3.Geothermal well uses the metal borehole wall 4, and insulating tube 7 is connected to well head and the shaft bottom of geothermal well, insulating tube 7 and the metal borehole wall 4 Between annular space form intake tunnel, the inside of insulating tube 7 forms exhalant canal.It intake tunnel, exhalant canal and is in Earth's surface takes heat heating component to combine to be formed and take thermal cycle.
The metal borehole wall 4 is equipped with upper screen 8 and lower screen 11, general upper screen in the part of aqueous heat reservori 10 8 are in aqueous heat reservori 10 close to one end of earth's surface, and lower screen 11 is in the aqueous one end of heat reservori 10 far from earth's surface.Upper Flow plug 9 is equipped in intake tunnel between portion's screen casing 8 and lower screen 11, flow plug 9 can be porous media, can also be Orifice plate, the effect of flow plug 9 mainly can be with the fluid flows of reasonable distribution pit shaft and aqueous heat reservori 10, and flow plug 9 Selection will consider the porosity and permeability and flow resistance characteristic of aqueous heat reservori 10.It, can if there is multiple aqueous heat reservoris 10 Not install flow plug 9, screen casing is set at multiple aqueous heat reservoris 10.
The heat heating component that takes in earth's surface includes heat pump unit 1, injection pump 2 and immersible pump 6, the position of immersible pump 6 It installs in the exit of exhalant canal, and is dipped under the hydrostatic level 5 at exhalant canal, injection pump 2 is connected to intake tunnel Inlet, the immersible pump 6, heat pump unit 1 and injection pump 2 be sequentially connected, and is from water outlet to form the circuit of circulation The water in exhalant canal is extracted out using immersible pump 6 in channel, supplies after recycling heat pump unit 1 that geothermal well is discharged promotion temperature It is warm, water at low temperature re-injection is finally entered into geothermal well using injection pump 2.And between injection pump 2 and intake tunnel, it can also be equipped with one A filter 12, the main function of filter 12 are to prevent impurity from blocking flow plug 9, therefore the performance of filter 12 will be according to resistance The specification of stream device 9 is chosen.
Specifically, by taking the geothermal well of well depth 2000m as an example, aqueous heat reservori 10 with a thickness of 200m, GEOTHERMAL WATER in reservoir Temperature be 80 DEG C.The return water temperature of heat pump unit 1 is 15 DEG C, and 15 DEG C of GEOTHERMAL WATER injects geothermal well after injection pump 2.On ground In the intake tunnel of hot well, pass through the GEOTHERMAL WATER of thermally conductive 15 DEG C of the heating of the rock of top 1800m first.In the attached of well depth 1800m It closely, is aqueous heat reservori 10, due to the effect of flow plug 9, part GEOTHERMAL WATER flows into aqueous heat reservori 10 through upper screen 8, He continues to flow downward fluid by flow plug 9 along pit shaft.At lower screen 11, geothermal fluid in aqueous heat reservori 10 and Fluid mixing in pit shaft, then flows into insulating tube 7 jointly.Assuming that in the aqueous heat reservori 10 flowed out from lower screen 11 Geothermal water temperature be 60 DEG C, after flow plug 9, continuing geothermal water temperature decline along pit shaft is 22 DEG C, after the two mixes, Temperature becomes 36 DEG C, and 36 DEG C of GEOTHERMAL WATER is after the promotion of immersible pump 6, into heat pump unit 1.36 DEG C of GEOTHERMAL WATER takes heat through heat pump Afterwards, become 15 DEG C, continue injection geothermal well and take heat, the top of such geothermal well passes through the thermally conductive extraction heat of rock, geothermal well Lower part heat is taken by convection current, realize that full well section takes heat.
Simply to illustrate that technical concepts and features of the invention, its purpose is allows in the art above-described embodiment Those of ordinary skill cans understand the content of the present invention and implement it accordingly, and it is not intended to limit the scope of the present invention.It is all It is the equivalent changes or modifications that the essence of content according to the present invention is made, should be covered by the scope of protection of the present invention.

Claims (6)

1. a kind of underground heat individual well is thermally conductive plus the full well section of convection current takes hot systems, it is characterised in that: including taking heat heating component and ground Under adopt hot component, described that heat heating component is taken to be arranged at earth's surface, the hot component of underground mining includes through underground is arranged in The geothermal well of tight rock layer and aqueous heat reservori and the insulating tube being arranged in the middle part of geothermal well, the geothermal well use metal The borehole wall, the well head and shaft bottom, the metal borehole wall of the insulating tube connection geothermal well are set in the part where aqueous heat reservori There are upper screen and lower screen, the inside of the insulating tube forms exhalant canal, between the insulating tube and the metal borehole wall Annular space formed intake tunnel.
2. a kind of underground heat individual well according to claim 1 is thermally conductive plus the full well section of convection current takes hot systems, it is characterised in that: described Taking heat heating component includes heat pump unit, injection pump and immersible pump, and the exit of exhalant canal is arranged in the immersible pump, and It is dipped under the hydrostatic level in exhalant canal, the injection pump is connected to the inlet of intake tunnel, the immersible pump, heat pump machine Group and injection pump are sequentially connected.
3. a kind of underground heat individual well according to claim 2 is thermally conductive plus the full well section of convection current takes hot systems, it is characterised in that: described Filter is additionally provided between injection pump and the entrance of intake tunnel.
4. a kind of underground heat individual well according to claim 1 is thermally conductive plus the full well section of convection current takes hot systems, it is characterised in that: described Flow plug is equipped in intake tunnel between upper screen and lower screen.
5. a kind of underground heat individual well according to claim 1 is thermally conductive plus the full well section of convection current takes hot systems, it is characterised in that: described Flow plug is equipped with multiple through-holes.
6. a kind of underground heat individual well according to claim 1 is thermally conductive plus the full well section of convection current takes hot systems, it is characterised in that: described Insulating tube is using insulating tube made of PPR pipe.
CN201910355853.XA 2019-04-29 2019-04-29 A kind of underground heat individual well is thermally conductive plus the full well section of convection current takes hot systems Pending CN110131780A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111412673A (en) * 2020-04-30 2020-07-14 中国石油天然气股份有限公司大港油田分公司 Single-well irrigation and production heat extraction system

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CN103925739A (en) * 2013-01-10 2014-07-16 江苏望远节能科技开发有限公司 Closed single-tube vertical borehole ground-coupled heat pump system
CN103982961A (en) * 2014-03-25 2014-08-13 河南润恒节能技术开发有限公司 Hose type water outlet and return device in same water source well for water source heat pump central air conditioner
CN105863569A (en) * 2016-04-14 2016-08-17 中国石油大学(华东) Single-well fracture gravity self-circulation dry-hot-rock geotherm mining method
CN205957523U (en) * 2016-07-05 2017-02-15 河南圆方干热岩勘探开发股份有限公司 Do hot dry rock (EGS) individual well multiple -limb heat transfer system
CN107763712A (en) * 2017-10-13 2018-03-06 中国科学院广州能源研究所 New individual well underground heat combined solar heating system
CN107860145A (en) * 2017-10-13 2018-03-30 中国科学院广州能源研究所 Underground heat individual well free convection enhanced heat exchange system
CN107990575A (en) * 2017-12-06 2018-05-04 张国建 Underground circular individual well heat-collecting system and the heat-collecting system of group wells complementation
CN108071367A (en) * 2018-01-15 2018-05-25 刘风岐 Individual well exploits closed recharge construction technology
CN108412462A (en) * 2018-03-16 2018-08-17 中国石油大学(北京) A method of it can with well recharge exploitation of geothermal

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103925739A (en) * 2013-01-10 2014-07-16 江苏望远节能科技开发有限公司 Closed single-tube vertical borehole ground-coupled heat pump system
CN103982961A (en) * 2014-03-25 2014-08-13 河南润恒节能技术开发有限公司 Hose type water outlet and return device in same water source well for water source heat pump central air conditioner
CN105863569A (en) * 2016-04-14 2016-08-17 中国石油大学(华东) Single-well fracture gravity self-circulation dry-hot-rock geotherm mining method
CN205957523U (en) * 2016-07-05 2017-02-15 河南圆方干热岩勘探开发股份有限公司 Do hot dry rock (EGS) individual well multiple -limb heat transfer system
CN107763712A (en) * 2017-10-13 2018-03-06 中国科学院广州能源研究所 New individual well underground heat combined solar heating system
CN107860145A (en) * 2017-10-13 2018-03-30 中国科学院广州能源研究所 Underground heat individual well free convection enhanced heat exchange system
CN107990575A (en) * 2017-12-06 2018-05-04 张国建 Underground circular individual well heat-collecting system and the heat-collecting system of group wells complementation
CN108071367A (en) * 2018-01-15 2018-05-25 刘风岐 Individual well exploits closed recharge construction technology
CN108412462A (en) * 2018-03-16 2018-08-17 中国石油大学(北京) A method of it can with well recharge exploitation of geothermal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111412673A (en) * 2020-04-30 2020-07-14 中国石油天然气股份有限公司大港油田分公司 Single-well irrigation and production heat extraction system

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