CN107940784A - A kind of open heat-exchange system in mid-deep strata geothermal energy underground and method - Google Patents
A kind of open heat-exchange system in mid-deep strata geothermal energy underground and method Download PDFInfo
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- CN107940784A CN107940784A CN201711124349.6A CN201711124349A CN107940784A CN 107940784 A CN107940784 A CN 107940784A CN 201711124349 A CN201711124349 A CN 201711124349A CN 107940784 A CN107940784 A CN 107940784A
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- 230000001105 regulatory effect Effects 0.000 claims abstract description 17
- 230000001174 ascending effect Effects 0.000 claims abstract description 16
- 239000004576 sand Substances 0.000 claims abstract description 14
- 239000013307 optical fiber Substances 0.000 claims abstract description 12
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- 238000005338 heat storage Methods 0.000 claims description 7
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- 239000002349 well water Substances 0.000 description 2
- 235000020681 well water Nutrition 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
- F24T10/00—Geothermal collectors
- F24T10/20—Geothermal collectors using underground water as working fluid; using working fluid injected directly into the ground, e.g. using injection wells and recovery wells
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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 present invention provides a kind of open heat-exchange system in mid-deep strata geothermal energy underground and method, heat-exchange system include distributed temperature measuring optical fiber, two water-level observation pipes, mixer, underground heat dedicated pipe, suction pump, except sand pump, heat exchanger, regulating tank；By underground heat dedicated pipe, draw water pump chamber and mixer is lowered into protective casing and wall protection pipe, the special bottom of the tube connection mixer of underground heat, top connects the pump chamber that draws water, suction pump is connected with except sand pump, heat exchanger, regulating tank successively by pipeline, the water outlet connection cold water ascending pipe of regulating tank, distributed temperature measuring optical fiber, No. two water-level observation pipes are arranged between underground heat dedicated pipe and protective casing, and No.1 water-level observation pipe is arranged in underground heat dedicated pipe.The system is open due to geothermal well heat reservori, exchanged heat by underground heat dedicated pipe, not only heat exchange efficiency is high, but also is fully able to realize that backwater amount is equal to pump-out, Geothermal Resource is not consumed, environmental pollution will not be caused through the geothermal water utilized because discharging.
Description
Technical field
The invention belongs to mid-deep strata geothermal energy Energy extraction technique and method field, more particularly, to a kind of mid-deep strata underground heat
Can the open heat-exchange system in underground and method.
Background technology
China《Geothermal energy development utilizes " 13 " planning》It is proposed：In " 13 " period, geothermal energy heating (system is increased newly
It is cold) 1,100,000,000 square metres of area, wherein:Newly-increased 700,000,000 square metres of (refrigeration) area of shallow layer geothermal energy heating；Newly-increased hot water type underground heat supplies
Warm 400,000,000 square metres of area.Newly-increased geothermal power generation installed capacity 500MW.To the year two thousand twenty geothermal energy year utilization about when 70,000,000 tons
Standard coal.《Planning》Fully show that China will be " 13 " period will greatly develop geothermal energy development and utilize.At the same time, by
Limited in by technical merit, geothermal energy development using bringing a series of problems such as the destruction Of resources, environmental pollution, utilization rate be low,
Effectively to solve these unfavorable factors, some advanced experiences of numerous scientific workers' one side foreign and technology, the opposing party
Substantial amounts of experiment and research work has been carried out in face, achieves plentiful and substantial achievement in research.The geothermal energy development in China utilizes master at present
There is following technical method.
1st, direct pumping underground hot water technology
The technology is by constructing at a glance or more geothermal wells, geothermal water being evacuated to earth's surface using water pump, directly or two
It is used for bathing, heating, power generation etc. after secondary heating.Its advantage is heat utilization rate height.Shortcoming is a large amount of consumption Geothermal Resources,
Resource reduction, water level is caused significantly to decline；Due to the universal salinity height of geothermal water, high-sulfur, there is corrosivity, profit is used
It will cause environmental pollution after terrestrial heat water discharge.
2nd, double well reinjection technology
The technology is water intake well at a glance of constructing, while (or two) inverted well at a glance of constructing.Water intake well is by geothermal water
After extracting, then by inverted well the geothermal water reinjection by utilizing to underground.Its advantage is heat utilization rate height.Lack
Point is the increase in geothermal energy development and utilizes cost.In some areas due to being limited by geological conditions, it is impossible to which whole recharges, can also lead
Cause resource consumption, problem of environmental pollution.
3rd, butt shaft technology
The technology refers to straight well at a glance of constructing first, inclined shaft at a glance of constructing again in its certain scope, and certain in underground
Depth (heat storage) is docked by horizontal well with straight well.Cold water is poured into from inclined shaft, after overheat storage heating, is discharged, is reached from straight well
Geothermal energy is carried to the purpose of earth's surface.Its advantage is heat utilization rate height, does not destroy Geothermal Resource, and environment will not be caused dirty
Dye.Shortcoming is that difficulty of construction is big, of high cost, is unfavorable for large-scale promotion application.
4th, individual well U-typed pipe or central tube underground heat transfer technology
The technology is a kind of technical method of " take heat do not fetch water ", the tripping in intermediate casing cementing first in geothermal well, with
Geothermal water is closed, afterwards tripping in U-typed pipe or central tube again in protective casing.A kind of is one end injection to U-typed pipe
Cold water, after being heated in well by ground temperature, hot water is flowed out from the other end of U-typed pipe under power effect.Another kind is to well
Interior injection cold water, after being heated by ground temperature, makes the hot water after heating be flowed out from central tube under pressure.Both approaches
Technical principle is essentially identical, only has a small amount of experimental project at home at present.Its advantage is not consume Geothermal Resource,
Environment will not be polluted.Shortcoming be heat exchange efficiency than relatively low, " cold dome product " effect occurs in long-time service, causes in well
Surrounding ground temperature decline, heat exchange amount is reduced.
It can thus be seen that although prior art can carry out geothermal energy development, all more or less presence is not
With the shortcomings that degree and problem.Therefore, for current resource, environmental protection, heat exchange efficiency it is low, " cold dome product " the problems such as, research and development
The open heat-exchange system in mid-deep strata geothermal energy underground and method that a kind of cost is low, heat exchange efficiency is high are urgently to be resolved hurrily ask
Topic.
The content of the invention
In view of this, the present invention is directed to propose a kind of open heat-exchange system in mid-deep strata geothermal energy underground and method, this is
System " takes heat not fetch water ", does not destroy Geothermal Resource, and generation environment does not pollute；Heat exchange efficiency can be not only improved, effectively solution
Certainly " cold dome product " effect problem, but also effectively reduce geothermal energy development and utilize cost.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
A kind of open heat-exchange system in mid-deep strata geothermal energy underground, including distributed temperature measuring optical fiber, two water-level observation pipes,
Mixer, underground heat dedicated pipe, suction pump, except sand pump, heat exchanger, regulating tank；The heat reservori of geothermal well is by water barrier and contains
Water layer forms, and underlies under cap rock, tripping in protective casing, wall protection pipe in geothermal well, between cap rock and protective casing, water proof
Cemented the well between layer and wall protection pipe with well cementing material, screen pipe is equipped between water-bearing layer and wall protection pipe；By underground heat dedicated pipe, suction pump
Room and mixer are lowered into protective casing and wall protection pipe, and the special bottom of the tube connection mixer of underground heat, top connects the pump chamber that draws water,
Tripping in suction pump is into the pump chamber that draws water, and suction pump is by pipeline successively with except sand pump, heat exchanger, regulating tank are connected, adjusting
The water outlet connection cold water ascending pipe of water tank, by cold water ascending pipe by cold water recharge to geothermal well, in suction pump and desanding
Flowmeter is installed on the pipeline between pump, abandons the mouth of a river (abandon to be provided with the mouth of a river and abandon penstock), pump control valve, is noted in cold water
Enter pipe and be equipped with water supplement port, water supply valve is installed on water supplement port, distributed temperature measuring optical fiber, No. two water-level observation pipes are arranged on ground
Between hot dedicated pipe and protective casing, No.1 water-level observation pipe is arranged in underground heat dedicated pipe.
Further, the mixer length is 5~10 meters.
Further, for the pump chamber that draws water, the pump chamber diameter that draws water should meet the requirement of suction pump on the underground heat dedicated pipe top.
Further, it is equipped with the pipeline between the heat exchanger and regulating tank and abandons the mouth of a river, is abandoned on the mouth of a river and install
Abandon penstock.
A kind of open heat-exchange method in mid-deep strata geothermal energy underground, its process are as follows：
The first step：Planned according to the buried depth of geothermal reservoir, heat supply, design geothermal well (depth, bore)；
Second step：Tripping in protective casing, wall protection pipe in geothermal well, between cap rock and protective casing, water barrier and retaining wall
Cemented the well between pipe with well cementing material, well cementation effect is examined after being cemented the well；Screen pipe is equipped between water-bearing layer and wall protection pipe；
3rd step：By design by underground heat dedicated pipe, draw water pump chamber and mixer is lowered into protective casing and wall protection pipe, ground
The special bottom of the tube connection mixer of heat, top connects the pump chamber that draws water；
4th step：Tripping in suction pump into the pump chamber that draws water, suction pump successively with except sand pump, heat exchanger, regulating tank connect
Connect, and flowmeter in cold water recharge to geothermal well, will be also equipped with this circuit by cold water ascending pipe, abandon penstock, pump
Control valve and water supply valve；
5th step：Distributed temperature measuring optical fiber, No. two water-level observation pipes are placed between underground heat dedicated pipe and protective casing；Will
No.1 water-level observation pipe is placed in underground heat dedicated pipe；
6th step：Start suction pump, the hot water in underground heat dedicated pipe is extracted into heat exchanger, heat exchanger extraction hot water
Thermal energy after, cold water is discharged, by cold water ascending pipe recharge to geothermal well, realizing that in individual well hot and cold water circulates；
7th step：The SEA LEVEL VARIATION of real-time monitored No.1 water-level observation pipe and No. two water-level observation pipes, make its substantially with from
Right water level is consistent, or the fuctuation within a narrow range above and below natural water level, and pump-out is equal to backwater amount at this time, does not consume groundwater resources；
8th step：When the water level of No.1 water-level observation pipe and No. two water-level observation pipes is less than natural water level, explanation has
GEOTHERMAL WATER in heat storage enters in well, can open water supply valve at this time, appropriate to increase backwater amount；
9th step：When the water level of No. two water-level observation pipes is higher than natural water level, illustrate that having cold water enters heat storage, if long
Phase in a state in which, it is possible to there is " cold dome product " phenomenon, can open abandon penstock at this time, it is appropriate to reduce backwater amount, make
The water level decreasing of No.1 water-level observation pipe and No. two water-level observation pipes, less than natural water level, " cold dome product " phenomenon will disappear quickly
Remove.
Further, it is welding or screwed connection between the protective casing, between protective casing and wall protection pipe.
Further, the underground heat dedicated pipe should be lowered into apart from shaft bottom above 10M~15M.
Further, 50m is not less than under underground heat well depth to the water-bearing layer of heat reservori.
Relative to the prior art, the open heat-exchange system in mid-deep strata geothermal energy underground of the present invention and method have with
Lower advantage：
1st, this heat-exchange system is exchanged heat by underground heat dedicated pipe, not only exchanged heat since geothermal well heat reservori is open
It is efficient, and be fully able to realize that backwater amount is equal to pump-out, Geothermal Resource is not consumed, will not be because discharging through utilizing
Geothermal water and cause environmental pollution.
2nd, it is wide-open that this heat-exchange system is stored up due to heat, and GEOTHERMAL WATER in the cold water and well of recharge can be made fully to carry out
Thermal energy exchange, so as to increase substantially heat exchange efficiency.
3rd, this heat-exchange method is by suitably increasing or decreasing backwater amount, to control GEOTHERMAL WATER supply well water or well water supply heat
Storage, effectively solves the problems, such as " cold dome product ".
4th, for this heat-exchange system relative to double well reinjection or butt shaft technology, this method can reduce by 50% geothermal well quantity,
Cost is utilized so as to effectively reduce geothermal energy resources.
Brief description of the drawings
The attached drawing for forming the part of the present invention is used for providing a further understanding of the present invention, schematic reality of the invention
Apply example and its explanation is used to explain the present invention, do not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the schematic diagram of the present invention.
Description of reference numerals：
1- cold water ascending pipes, 2- distributed temperature measuring optical fiber, 3- well cementing materials, 4- protective casings, the 5- boreholes wall, 6- wall protection pipes,
7- screen pipes, 8- mixers, 9- underground heat dedicated pipes, 10- suction pumps, 11- draw water pump chamber, 12- hot water extraction pipe, 13- No.1 water
Position sighting tube, 14- flowmeters, 15 abandon penstock, 16- pump control valves, and 17- removes sand pump, 18- heat exchangers, and 19- adjusts water
Case, 20- water supply valves, 21- cap rocks, 22- groundwater levels, 23- water barriers, 24- heat reservoris, 25- water-bearing layers, No. bis- water of 26-
Position sighting tube.
Embodiment
It should be noted that in the case where there is no conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
In the description of the present invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " on ", " under ",
The orientation or position relationship of the instruction such as "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " are
Based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description, rather than instruction or dark
Show that the device of meaning or element there must be specific orientation, with specific azimuth configuration and operation, thus it is it is not intended that right
The limitation of the present invention.In addition, term " first ", " second " etc. are only used for description purpose, and it is not intended that instruction or hint phase
To importance or the implicit quantity for indicating indicated technical characteristic.Thus, the feature for defining " first ", " second " etc. can
To express or implicitly include one or more this feature.In the description of the present invention, unless otherwise indicated, " multiple "
It is meant that two or more.
In the description of the present invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or be electrically connected；It can be directly connected, can also be indirectly connected by intermediary, Ke Yishi
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood by concrete condition
Concrete meaning in the present invention.
Below with reference to the accompanying drawings and the present invention will be described in detail in conjunction with the embodiments.
A kind of open heat-exchange system in mid-deep strata geothermal energy underground, including 2, two water-level observations of distributed temperature measuring optical fiber
Pipe, mixer 8, underground heat dedicated pipe 9, suction pump 10, except sand pump 17, heat exchanger 18, regulating tank 19；The heat reservori of geothermal well
24 are made of water barrier 23 and water-bearing layer 25, underlie under cap rock 21, tripping in protective casing 4, wall protection pipe 6 in geothermal well,
Cemented the well between cap rock 21 and protective casing 4, between water barrier 23 and wall protection pipe 6 with well cementing material 3, water-bearing layer 25 and wall protection pipe 6
Between be equipped with screen pipe 7；Between protective casing 4, between protective casing 4 and wall protection pipe 6 for welding or screwed connection, underground heat is special
With pipe 9, draw water pump chamber 11 and mixer 8 is lowered into protective casing 4 and wall protection pipe 6,9 bottom of underground heat dedicated pipe connection mixer
8, top connects the pump chamber 11 that draws water, and 8 length of mixer is 5~10 meters, and 11 diameter of pump chamber that draws water should meet the requirement of suction pump 10,
Tripping in suction pump 10 into the pump chamber 11 that draws water, suction pump 10 by pipeline successively with except sand pump 17, heat exchanger 18, regulating tank
19 connections, the water outlet connection cold water ascending pipe 1 of regulating tank 19, by cold water ascending pipe 1 by cold water recharge to geothermal well,
(abandon to be provided with the mouth of a river and abandon penstock in suction pump 10 and except being provided with flowmeter 14 on the pipeline between sand pump 17, abandoning the mouth of a river
15) control valve 16, is pumped, is equipped with the pipeline between the heat exchanger 18 and regulating tank 19 and abandons the mouth of a river, abandoned on the mouth of a river
It is provided with and abandons penstock 15, water supplement port is equipped with cold water ascending pipe 1, water supply valve 20 is installed on water supplement port, distribution is surveyed
Warm 2, No. two water-level observation pipes 26 of optical fiber are arranged between underground heat dedicated pipe 9 and protective casing 4, and No.1 water-level observation pipe 13 is set
In underground heat dedicated pipe 9.Since geothermal well heat reservori is open, the system is exchanged heat using underground heat dedicated pipe, Neng Goushi
Existing backwater amount is equal to pump-out, does not consume Geothermal Resource, will not cause environment dirty through the geothermal water utilized because discharging
Dye, while GEOTHERMAL WATER in the cold water and well of recharge can be made fully to carry out thermal energy exchange, so as to increase substantially heat exchange efficiency.
The open heat-exchange method in this mid-deep strata geothermal energy underground, its process are as follows：
The first step：Planned according to the buried depth of geothermal reservoir, heat supply, design geothermal well (depth, bore), by design and construction ground
It is not less than 50m under hot well depth to the water-bearing layer of heat reservori；
Second step：Tripping in protective casing 4, wall protection pipe 6 in geothermal well, between cap rock 21 and protective casing 4, water barrier 23
Cemented the well between wall protection pipe 6 with well cementing material 3, well cementation effect is examined after being cemented the well；It is equipped between water-bearing layer 25 and wall protection pipe 6
Screen pipe 7；
3rd step：By design by underground heat dedicated pipe 9, draw water pump chamber 11 and mixer 8 is lowered into protective casing 4 and wall protection pipe
In 6,9 bottom of underground heat dedicated pipe connection mixer 8, top connects the pump chamber 11 that draws water, and underground heat dedicated pipe 9 should be lowered into apart from shaft bottom
Above 10M~15M；
4th step：Tripping in suction pump 10 into the pump chamber 11 that draws water, suction pump 10 successively with except sand pump 17, heat exchanger 18,
Regulating tank 19 connects, and is also equipped with flowmeter on this circuit by cold water recharge to geothermal well by cold water ascending pipe 1
14th, penstock 15, pump control valve 16 and water supply valve 20 are abandoned；
5th step：By 2, No. two water-level observation pipes 26 of distributed temperature measuring optical fiber be placed in underground heat dedicated pipe 9 and protective casing 4 it
Between；No.1 water-level observation pipe 13 is placed in underground heat dedicated pipe 9；
6th step：Start suction pump 10, the hot water in underground heat dedicated pipe 9 is extracted into heat exchanger, heat exchanger extraction
After the thermal energy of hot water, cold water is discharged, by 1 recharge of cold water ascending pipe to geothermal well, realizing that hot and cold water follows in individual well
Ring；
7th step：The SEA LEVEL VARIATION of real-time monitored No.1 water-level observation pipe 13 and No. two water-level observation pipes 26, makes its basic
Consistent with natural water level, or the fuctuation within a narrow range above and below natural water level, pump-out is equal to backwater amount at this time, does not consume underground water money
Source；
8th step：When the water level of No.1 water-level observation pipe 13 and No. two water-level observation pipes 26 is less than natural water level, explanation
The GEOTHERMAL WATER having in heat storage enters in well, can open water supply valve 20 at this time, appropriate to increase backwater amount；
9th step：When the water level of No. two water-level observation pipes 26 is higher than natural water level, illustrate that having cold water enters heat storage, if
It is chronically at this state, it is possible to " cold dome product " phenomenon occur, can open abandon penstock 15 at this time, suitably reduce backwater
Amount, makes the water level decreasing of No.1 water-level observation pipe 13 and No. two water-level observation pipes 26, less than natural water level, " cold dome product " phenomenon is just
It can eliminate quickly.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on, should all be included in the protection scope of the present invention god.
Claims (8)
- A kind of 1. open heat-exchange system in mid-deep strata geothermal energy underground, it is characterised in that：Including distributed temperature measuring optical fiber, two water Position sighting tube, mixer, underground heat dedicated pipe, suction pump, except sand pump, heat exchanger, regulating tank, the tripping in technology in geothermal well Casing, wall protection pipe, are cemented the well between cap rock and protective casing, between water barrier and wall protection pipe with well cementing material, water-bearing layer and retaining wall Screen pipe is equipped between pipe, by underground heat dedicated pipe, draws water pump chamber and mixer is lowered into protective casing and wall protection pipe, underground heat is special Connect mixer with bottom of the tube, top connection is drawn water pump chamber, tripping in suction pump into the pump chamber that draws water, suction pump by pipeline successively With except sand pump, heat exchanger, regulating tank are connected, the water outlet of regulating tank connection cold water ascending pipe, passes through cold water ascending pipe By in cold water recharge to geothermal well, in suction pump and except being provided with flowmeter on the pipeline between sand pump, abandon penstock, pump amount control Valve processed, is equipped with water supplement port on cold water ascending pipe, and water supply valve, distributed temperature measuring optical fiber, No. two water levels are provided with water supplement port Sighting tube is arranged between underground heat dedicated pipe and protective casing, and No.1 water-level observation pipe is arranged in underground heat dedicated pipe.
- A kind of 2. open heat-exchange system in mid-deep strata geothermal energy underground according to claim 1, it is characterised in that：Described Pipeline between heat exchanger and regulating tank, which is equipped with, abandons the mouth of a river, abandons to be provided with the mouth of a river and abandons penstock.
- A kind of 3. open heat-exchange system in mid-deep strata geothermal energy underground according to claim 1 or 2, it is characterised in that：Institute Mixer length is stated as 5~10 meters.
- A kind of 4. open heat-exchange system in mid-deep strata geothermal energy underground according to claim 3, it is characterised in that：Describedly For the pump chamber that draws water, the pump chamber diameter that draws water should meet the requirement of suction pump on hot dedicated pipe top.
- 5. a kind of heat-exchange method of open heat-exchange system in mid-deep strata geothermal energy underground for described in claim 1, its feature It is, its process is as follows：The first step：Planned according to the buried depth of geothermal reservoir, heat supply, design geothermal well；Second step：Tripping in protective casing, wall protection pipe in geothermal well, between cap rock and protective casing, water barrier and wall protection pipe it Between cemented the well with well cementing material, after being cemented the well examine well cementation effect；Screen pipe is equipped between water-bearing layer and wall protection pipe；3rd step：By design by underground heat dedicated pipe, draw water pump chamber and mixer is lowered into protective casing and wall protection pipe, underground heat is special Mixer is connected with bottom of the tube, top connects the pump chamber that draws water；4th step：Tripping in suction pump into the pump chamber that draws water, suction pump successively with except sand pump, heat exchanger, regulating tank are connected, and Flowmeter in cold water recharge to geothermal well, will be also equipped with this circuit by cold water ascending pipe, abandon penstock, the control of pump amount Valve and water supply valve；5th step：Distributed temperature measuring optical fiber, No. two water-level observation pipes are placed between underground heat dedicated pipe and protective casing；By No.1 Water-level observation pipe is placed in underground heat dedicated pipe；6th step：Start suction pump, the hot water in underground heat dedicated pipe is extracted into heat exchanger, heat exchanger extracts the heat of hot water After energy, cold water is discharged, by cold water ascending pipe recharge to geothermal well, realizing, hot and cold water circulates in individual well；7th step：The SEA LEVEL VARIATION of real-time monitored No.1 water-level observation pipe and No. two water-level observation pipes, makes itself and natural water level one Cause, or fluctuated above and below natural water level, pump-out is equal to backwater amount at this time, does not consume groundwater resources；8th step：When the water level of No.1 water-level observation pipe and No. two water-level observation pipes is less than natural water level, illustrate to have hot storage In GEOTHERMAL WATER enter in well, can open water supply valve at this time, increase backwater amount；9th step：When the water level of No. two water-level observation pipes is higher than natural water level, illustrate that having cold water enters heat storage, if long-term place In this state, " cold dome product " phenomenon just occurs, opens abandon penstock at this time, reduce backwater amount, make No.1 water-level observation pipe With the water level decreasing of No. two water-level observation pipes, less than natural water level, " cold dome product " phenomenon will eliminate quickly.
- 6. the open heat-exchange method in mid-deep strata geothermal energy underground according to claim 5, it is characterised in that：The technology set It is welding or screwed connection between pipe, between protective casing and wall protection pipe.
- 7. the open heat-exchange method in mid-deep strata geothermal energy underground according to claim 5, it is characterised in that：The underground heat is special It should be lowered into apart from shaft bottom above 10M~15M with pipe.
- 8. the open heat-exchange method in mid-deep strata geothermal energy underground according to claim 5, it is characterised in that：Underground heat well depth It is not less than 50m under to the water-bearing layer of heat reservori.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711124349.6A CN107940784B (en) | 2017-11-14 | 2017-11-14 | Underground open type heat exchange system and method for middle-deep layer geothermal energy |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711124349.6A CN107940784B (en) | 2017-11-14 | 2017-11-14 | Underground open type heat exchange system and method for middle-deep layer geothermal energy |
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| Publication Number | Publication Date |
|---|---|
| CN107940784A true CN107940784A (en) | 2018-04-20 |
| CN107940784B CN107940784B (en) | 2020-01-17 |
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| CN115183344A (en) * | 2022-03-08 | 2022-10-14 | 中国矿业大学(北京) | Mine pit heat energy utilization system and utilization method |
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