CN210772840U - Deep well heat exchange system - Google Patents
Deep well heat exchange system Download PDFInfo
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- CN210772840U CN210772840U CN201921758563.1U CN201921758563U CN210772840U CN 210772840 U CN210772840 U CN 210772840U CN 201921758563 U CN201921758563 U CN 201921758563U CN 210772840 U CN210772840 U CN 210772840U
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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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Abstract
The utility model relates to the field of geothermal development and utilization, and provides a deep well heat exchange system, which comprises a well body structure, a water inlet pipe and a water outlet pipe; the outlet of the water inlet pipe is communicated with the inlet of the water outlet pipe in the well body structure; the water inlet pipe comprises a plurality of vertical water inlet pipe sections and a plurality of single spiral water inlet pipe sections; the vertical water inlet pipe section and the single-spiral water inlet pipe section are sequentially and alternately communicated, and the single-spiral water inlet pipe section surrounds the water outlet pipe and corresponds to the abnormal temperature rising section of the well body structure. The utility model provides a deep well heat exchange system through set up inlet tube and outlet pipe in well body structure, forms and not communicate with well groundwater, has the energy exchange, does not have the material exchange, independent circulation system. Meanwhile, the single-spiral water inlet pipe section surrounds the outside of the water outlet pipe, so that the length of the water inlet pipe is effectively increased, the flow rate of the unit depth of water inflow is reduced, the heat exchange area and the heat exchange effect are improved, the development and the utilization of deep well geothermal resources are effectively realized, and the device has the characteristics of environmental protection, high efficiency and no water taking when heat is taken.
Description
Technical Field
The utility model relates to a geothermal development and utilization field, in particular to deep well heat exchange system.
Background
At present, deep well geothermal resources are mainly utilized by directly pumping underground hot water into a deep well below the water level by a water pump.
However, most of the groundwater is discharged after the heat resources are utilized, so that the groundwater resources are wasted, even the ground surface water system is polluted, the underground position of the area is lowered, the ground is sunk, and the like, and the geothermal resources cannot be stably utilized for a long time. Under the circumstances that the development of the country for green energy is increased and the environment is strictly required, the market urgently needs a method which does not exploit underground hot water and can solve the problem of efficiently and stably utilizing geothermal (dry heat rock) resources.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
In view of the technical defects and application requirements, the application provides a deep well heat exchange system, and aims to provide a device which can realize efficient and stable utilization of geothermal resources without exploiting underground water.
(II) technical scheme
In order to solve the above problem, the utility model provides a deep well heat exchange system, include: a well structure, a water inlet pipe and a water outlet pipe; the outlet of the water inlet pipe is communicated with the inlet of the water outlet pipe in the well body structure; the inlet tube includes: a plurality of vertical water inlet pipe sections and a plurality of single spiral water inlet pipe sections; the vertical water inlet pipe sections and the single-spiral water inlet pipe sections are sequentially and alternately communicated; each single-spiral water inlet pipe section is surrounded outside the water outlet pipe and corresponds to the abnormal temperature rise section of the well body structure.
Further, the outlet pipe includes: a plurality of water outlet pipe hoops and a plurality of water outlet pipe units; the water outlet pipe hoop and the water outlet pipe units are sequentially and alternately connected.
Further, the vertical water intake pipe section includes: a plurality of water inlet pipe hoops and a plurality of water inlet pipe units; the water inlet pipe hoop and the water inlet pipe units are sequentially and alternately connected.
Further, the inlet pipe still includes: a single-spiral heat exchange head; the single-spiral heat exchange head is used for communicating the single-spiral water inlet pipe section at the bottommost part with the water outlet pipe.
Further, the single spiral water inlet pipe section comprises: a plurality of spiral units; each spiral unit is communicated in sequence and is arranged spirally along the circumference of the water outlet pipe in sequence.
Further, the single spiral water inlet pipe section still includes: a plurality of heat transfer units; the heat transfer unit is arranged between the spiral pipe sections of the adjacent spiral units.
Further, still include: a circulation pump; the circulating pump is arranged on the water outlet pipe.
Further, still include: a heat pump; the heat pump is arranged on the water inlet pipe and the water outlet pipe at the same time.
Further, the well bore structure comprises: a first hole diameter section and a second hole diameter section are drilled downwards in sequence along the vertical direction; the aperture of the second open bore section is smaller than the aperture of the first open bore section.
Further, the well bore structure further comprises: a cementing section, a casing and a perforated pipe;
the well cementation section is connected with the annular inner wall in the first open-pore diameter section; the casing is annularly arranged in the well cementation section; the perforated pipe is connected with the annular inner wall in the second open-pore diameter section.
(III) advantageous effects
The utility model provides a deep well heat exchange system through set up inlet tube and outlet pipe in well body structure, forms and not communicate with the well groundwater in, has the energy exchange, does not have the material exchange, independent circulation system. Meanwhile, the single-spiral water inlet pipe section surrounds the outside of the water outlet pipe, so that the length of the water inlet pipe is effectively increased, the flow rate of the unit depth of water inflow is reduced, the heat exchange area and the heat exchange effect are improved, the development and the utilization of deep well geothermal resources are effectively realized, and the device has the characteristics of environmental protection, high efficiency and no water taking when heat is taken.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a deep well heat exchange system according to an embodiment of the present invention;
fig. 2 is a schematic partial structural view of a deep well heat exchange system according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an outlet pipe unit and an inlet pipe unit provided in the embodiment of the present invention;
fig. 4 is a schematic structural diagram of a single-spiral heat exchange head according to an embodiment of the present invention;
fig. 5 is a schematic structural view of a single-screw water inlet pipe section provided in an embodiment of the present invention;
wherein, 1, a water inlet pipe; 2. a water outlet pipe; 3. a circulation pump; 4. a heat pump; 5. a well cementation section; 6. a sleeve; 7. a floral tube; 11. a water inlet pipe unit; 12. a spiral heat exchange head; 13. a spiral unit; 14. a heat transfer unit; 21. and a water outlet pipe unit.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The embodiment of the utility model provides a deep well heat exchange system, as shown in fig. 1 and 2, well body structure, inlet tube 1 and outlet pipe 2. In order to enhance the heat exchange effect, the water inlet pipe 1 and the water outlet pipe 2 can be made of copper. The outlet of the water inlet pipe 1 is communicated with the inlet of the water outlet pipe 2 in the well structure. The water inlet pipe 1 includes: a plurality of vertical water inlet pipe sections and a plurality of single spiral water inlet pipe sections. The vertical water inlet pipe sections and the single-spiral water inlet pipe sections are sequentially and alternately communicated; each single-spiral water inlet pipe section surrounds the water outlet pipe 2, and each single-spiral water inlet pipe section corresponds to the abnormal temperature rise section of the well structure.
It should be noted that, the water inlet pipe 1 is not integrally a single-screw water inlet pipe section, but the single-screw water inlet pipe section corresponds to the abnormal temperature rise section of the well structure, mainly for reducing the cost of the whole system and precisely improving the heat exchange effect in the well.
Specifically, the water inlet pipe 1 and the water outlet pipe 2 are preferably 60 mm-120 mm (outer diameter of the spiral section) according to the hole diameter and other clearance conditions of cables and the like entering the well, and the single-spiral water inlet pipe section with the corresponding outer diameter can be customized according to actual conditions.
In order to ensure the temperature of the outlet water, the outside of the outlet pipe 2 can be subjected to heat preservation and insulation treatment. The outside of the water inlet pipe 1 does not need to be subjected to heat preservation and insulation treatment. The vertical water inlet pipe section and the single-spiral water inlet pipe section can be externally treated with a metal anti-corrosion coating, so that the heat conduction and heat exchange effects are ensured, the corrosion of underground water in a deep well to the pipeline is prevented, and the service life of the system is prolonged.
After all parts in the heat exchange system of the deep well are connected, normal-temperature circulating liquid is injected from the water inlet pipe 1 and the whole system pipeline is filled with the circulating liquid, distilled water or other liquid can be selected as the circulating liquid, so that the system pipeline is not corroded or scaled, and the pollution in the well can not be caused if the system pipeline leaks. The circulation liquid in the inlet tube 1 is discharged through the vertical water inlet tube section and the single-spiral water inlet tube section and finally through the water outlet tube 2, and heat exchange is carried out in the well structure, so that the circulation liquid carries heat, and deep well geothermal resources are extracted and utilized.
The embodiment of the utility model provides a deep well heat exchange system through set up inlet tube and outlet pipe in well body structure, forms and not communicate with well groundwater, has the energy exchange, does not have the material exchange, independent circulation system. Meanwhile, the single-spiral water inlet pipe section surrounds the outside of the water outlet pipe, so that the length of the water inlet pipe is effectively increased, the flow rate of the unit depth of water inflow is reduced, the heat exchange area and the heat exchange effect are improved, the development and the utilization of deep well geothermal resources are effectively realized, and the device has the characteristics of environmental protection, high efficiency and no water taking when heat is taken.
According to the above embodiments, in a preferred embodiment, as shown in fig. 1, 2 and 3, the inlet pipe 1 and the outlet pipe 2 are connected by a plurality of pipes, and are assembled on site, thereby facilitating processing, transportation, installation, maintenance and replacement. The length of the single section of the water inlet pipe 1 and the water outlet pipe 2 is preferably 2m to 6 m.
Wherein, outlet pipe 2 includes: the water outlet pipe units 21 and the water outlet pipe hoops can be connected with each other by screw threads, namely, in a threaded manner. The water outlet pipe hoops and the water outlet pipe units 21 are alternately connected in sequence, namely the water outlet pipe units 21 are connected through the water outlet pipe hoops. The water inlet pipe 1 comprises a vertical water inlet pipe section and a single-spiral water inlet pipe section, and the vertical water inlet pipe section and the single-spiral water inlet pipe section are both in multiple sections. The vertical water intake pipe section includes: a plurality of inlet pipe hoop and a plurality of inlet pipe unit 11, each section of vertical inlet pipe section includes inlet pipe hoop and inlet pipe unit, and inlet pipe unit 11 can adopt the screw thread to be connected with the inlet pipe hoop. The water inlet pipe hoop and the water inlet pipe units 11 are sequentially and alternately connected, namely, the water inlet pipe units 11 are connected through the water inlet pipe hoop. The single-spiral water inlet pipe sections are all surrounded outside the water outlet pipe 2 and correspond to the abnormal temperature rise sections of the well structure. After the water outlet pipe hoop is installed on site, the outside is subjected to heat preservation and insulation treatment, so that the loss of heat carried by circulating liquid is reduced. The water inlet pipe hoop does not need further heat insulation treatment.
As shown in fig. 5, the single-screw water inlet pipe section includes: a number of spiral units 13 and a number of heat transfer units 14. The spiral units 13 are sequentially communicated and are sequentially arranged along the circumferential direction of the water outlet pipe 2 in a spiral mode. The heat transfer unit 14 is disposed between the spiral tube sections of the adjacent spiral units 13, and the heat transfer unit 14 is welded between the adjacent spiral units 13. A heat insulation layer can be additionally arranged between the single-spiral water inlet pipe section and the water outlet pipe 2, so that the loss of heat carried by circulating liquid is reduced.
In this embodiment, as shown in fig. 1, fig. 2, fig. 3 and fig. 4, the water inlet pipe 1 further includes: a single-spiral heat exchange head 12. The single-spiral heat exchange head 12 is used for communicating the bottommost single-spiral water inlet pipe section with the water outlet pipe 2, and the single-spiral heat exchange head 12 is simultaneously in threaded connection with the single-spiral water inlet pipe section and the water outlet pipe. The single-spiral heat exchange head 12 is lowered to the lowest part of the abnormal rising section of the well temperature, and the geothermal resources in the deep well are fully utilized.
In addition, because the inlet pipe 1 and the outlet pipe 2 are formed by connecting a plurality of sections of pipelines, the sections can also be connected through flanges, the bolts adopted for the flange connection are high-strength corrosion-resistant bolts, and the sealing gaskets adopted for the flange connection are all high-temperature-resistant and corrosion-resistant metal sealing gaskets.
In this embodiment, the well structure includes: and the first open pore section and the second open pore section are sequentially drilled downwards along the vertical direction. The aperture of the second open-bore section is smaller than the aperture of the first open-bore section. Each section of trompil footpath is the cylinder structure of coaxial setting. It should be noted that, due to different geological conditions, the first aperture section and the second aperture section may also be arranged at an angle, and the aperture sections are sequentially and horizontally communicated within a certain error range, for example, 0 to 10 °.
Wherein, well structure still includes: a cementing section 5, a casing 6 and a perforated pipe 7. The cementing section 5 is connected with the annular inner wall in the first open-bore section. The casing 6 is annularly arranged in the well cementing section. The perforated pipe 7 is connected with the annular inner wall in the second open-pore diameter section. The height of the floral tube 7 may exceed the height of the second open pore section.
In the actual construction process, in order to ensure the safe operation of the drilling process, after the first drilling is started to form a first open-hole diameter section, the well cementation section 5 is put in, and the well cementation is carried out through the well cementation section 5. And after the well cementation section 5 finishes well cementation, a casing 6 is put in. And then, starting second drilling, and after the drilling is finished, putting the perforated pipe 7 into the second open-pore diameter section.
In order to facilitate the flow of the circulating liquid in the deep well heat exchange system, a circulating pump 3 can be arranged on the water outlet pipe 2. In order to increase the temperature of the circulating liquid discharged from the water outlet pipe 2, a heat pump 4 can be arranged on the water inlet pipe 1 and the water outlet pipe 2. And then after all parts in the deep well heat exchange system are connected, normal temperature circulating liquid is injected from the water inlet pipe 1, the whole system pipeline is filled, and the circulating pump works. Circulation liquid in the inlet tube 1 is discharged through the outlet pipe 2 through the vertical water inlet pipe section and the single-spiral water inlet pipe section, and the vertical water inlet pipe section and the single-spiral water inlet pipe section exchange heat in the well structure, so that the circulation liquid carries heat and is discharged through the outlet pipe 2, and the circulation liquid can be combined with a heat pump to increase the temperature when necessary, so that deep well geothermal resources are extracted and utilized.
The utility model provides a deep well heat exchange system, mainly used deep well contact heat exchange forms and not communicates with the groundwater in the well, has the energy exchange, does not have the material exchange, independent circulation system. The underground water resource is not damaged and polluted; scaling and blockage on the overground heat pump and the pipeline of the system can be avoided; compared with the vertical inner and outer double-layer heat exchange pipe system, the length of the water inlet pipe is increased, the flow rate of the water inlet per unit depth is reduced, the heat exchange area is increased, and the heat exchange effect is improved. The ground surface circulating pump and the heat pump are matched, the development and utilization of geothermal (dry hot rock) deep well geothermal resources can be realized, and the device has the characteristics of environmental protection, high efficiency and no water intake when heat is taken.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. A deep well heat exchange system, comprising:
a well structure, a water inlet pipe and a water outlet pipe;
the outlet of the water inlet pipe is communicated with the inlet of the water outlet pipe in the well body structure; the inlet tube includes: a plurality of vertical water inlet pipe sections and a plurality of single spiral water inlet pipe sections; the vertical water inlet pipe sections and the single-spiral water inlet pipe sections are sequentially and alternately communicated; each single-spiral water inlet pipe section is surrounded outside the water outlet pipe and corresponds to the abnormal temperature rise section of the well body structure.
2. The deep well heat exchange system of claim 1, wherein the outlet pipe comprises: a plurality of water outlet pipe hoops and a plurality of water outlet pipe units; the water outlet pipe hoop and the water outlet pipe units are sequentially and alternately connected.
3. The deep well heat exchange system of claim 1, wherein the vertical water inlet pipe section comprises: a plurality of water inlet pipe hoops and a plurality of water inlet pipe units; the water inlet pipe hoop and the water inlet pipe units are sequentially and alternately connected.
4. The deep well heat exchange system of claim 1, wherein the water inlet pipe further comprises: a single-spiral heat exchange head; the single-spiral heat exchange head is used for communicating the single-spiral water inlet pipe section at the bottommost part with the water outlet pipe.
5. The deep well heat exchange system of claim 1, wherein the single helical water entry tube segment comprises: a plurality of spiral units; each spiral unit is communicated in sequence and is arranged spirally along the circumference of the water outlet pipe in sequence.
6. The deep well heat exchange system of claim 5, wherein the single helical water entry tube segment further comprises: a plurality of heat transfer units; the heat transfer unit is arranged between the spiral pipe sections of the adjacent spiral units.
7. The deep well heat exchange system of claim 1, further comprising: a circulation pump; the circulating pump is arranged on the water outlet pipe.
8. The deep well heat exchange system of claim 1, further comprising: a heat pump; the heat pump is arranged on the water inlet pipe and the water outlet pipe at the same time.
9. The deep well heat exchange system of claim 1, wherein the well structure comprises: a first hole diameter section and a second hole diameter section are drilled downwards in sequence along the vertical direction; the aperture of the second open bore section is smaller than the aperture of the first open bore section.
10. The deep well heat exchange system of claim 9, wherein the well structure further comprises: a cementing section, a casing and a perforated pipe;
the well cementation section is connected with the annular inner wall in the first open-pore diameter section; the casing is annularly arranged in the well cementation section; the perforated pipe is connected with the annular inner wall in the second open-pore diameter section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921758563.1U CN210772840U (en) | 2019-10-17 | 2019-10-17 | Deep well heat exchange system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921758563.1U CN210772840U (en) | 2019-10-17 | 2019-10-17 | Deep well heat exchange system |
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| CN210772840U true CN210772840U (en) | 2020-06-16 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113648952A (en) * | 2021-08-17 | 2021-11-16 | 镇海石化工业贸易有限责任公司 | Inner cooling pipe of polymerization kettle, inner cooling system of polymerization kettle and construction method |
| CN113756748A (en) * | 2021-06-09 | 2021-12-07 | 吉林大学 | Heat exchange well completion device and development method |
| CN113899092A (en) * | 2021-11-01 | 2022-01-07 | 中煤矿业集团有限公司 | Deep well heat exchange device and installation method thereof |
-
2019
- 2019-10-17 CN CN201921758563.1U patent/CN210772840U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113756748A (en) * | 2021-06-09 | 2021-12-07 | 吉林大学 | Heat exchange well completion device and development method |
| CN113648952A (en) * | 2021-08-17 | 2021-11-16 | 镇海石化工业贸易有限责任公司 | Inner cooling pipe of polymerization kettle, inner cooling system of polymerization kettle and construction method |
| CN113899092A (en) * | 2021-11-01 | 2022-01-07 | 中煤矿业集团有限公司 | Deep well heat exchange device and installation method thereof |
| CN113899092B (en) * | 2021-11-01 | 2024-02-23 | 中煤矿业集团有限公司 | Deep well heat exchange device and installation method thereof |
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