CN212930535U - Novel geothermal well structure - Google Patents

Novel geothermal well structure Download PDF

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Publication number
CN212930535U
CN212930535U CN202021127747.0U CN202021127747U CN212930535U CN 212930535 U CN212930535 U CN 212930535U CN 202021127747 U CN202021127747 U CN 202021127747U CN 212930535 U CN212930535 U CN 212930535U
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pipe
water
heat
well
heat preservation
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王国辉
殷学平
张万虎
刘元宝
刘星涛
郭军刚
魏传水
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China Chemical Engineering Heavy Mechanization Co ltd
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China Chemical Engineering Heavy Mechanization Co ltd
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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
    • 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
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/14—Thermal energy storage
    • 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
    • Y02E70/00—Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin

Abstract

The utility model discloses a novel geothermal well structure, include: the system comprises a pumping well, a water pipe, a heat exchange system, a water return pipe, a recharge well, a sealing layer for separating a water running section and a water production section, a heating pipe close to the water production section and communicated with the water production section, a plurality of groups of heat preservation pipes and an oil pump; the heat preservation pipe is divided into an upper straight pipe and a lower annular pipe, and the lower annular pipe is close to the heating pipe; the heating pipe heats the heat preservation pipe, and the heat preservation pipe is used for preserving heat of the water supply and delivery pipe; the utility model discloses construct simply, the pipeline of arranging is reasonable, sets up heating pipe and insulating tube, utilizes different nature characteristics between the different liquid to carry out multistage transmission with the heat, has realized getting hot heat preservation effect to the geothermal well of long tube journey, need not add in addition the structure of heating power consumption such as electric tracing band, energy saving.

Description

Novel geothermal well structure
Technical Field
The utility model relates to a geothermal well exploration construction field. More specifically, the utility model relates to a novel geothermal well structure.
Background
The geothermal well is a natural environment-friendly resource, carries geothermal energy, takes water as a medium, and has practical values of supplying heat and generating electricity for the public.
The geothermal wells are distributed unevenly, the depths of the geothermal wells are different according to different actual water temperatures, the depths are 1000-3800 m, and the pipe lengths are long; when the elevation is higher and the air temperature is low, the tube pass of the geothermal well is too long, the heat energy loss is larger, and therefore heat preservation treatment needs to be carried out on a shaft of the geothermal well;
the existing heat preservation methods are various and are divided into an external heat source heat preservation treatment method and an isolation method, the external heat source heat preservation treatment method can be used for arranging a geothermal electric pump or an electric tracing band near a well wall, electrifying the geothermal electric pump or the electric tracing band to heat and preserve heat of the surrounding environment, a large amount of electric energy is consumed, and the other method is used for arranging a heat preservation water pipe layer in a geothermal well and preserving heat of a water pipe in a mode of pouring hot water backwards; both methods require additional energy consumption, which directly or indirectly results in energy waste.
SUMMERY OF THE UTILITY MODEL
It is an object of the present invention to solve at least the above problems and to provide at least the advantages which will be described later.
The utility model discloses the geothermal well structure is provided to a novel, and its simple structure sets up heating pipe and insulating tube through the pipeline of rationally arranging, utilizes the characteristics of the different specific heat capacities between the different liquid to carry out multistage transmission with the heat, has realized the heat preservation effect of getting heat to the geothermal well of long tube journey, need not add in addition the structure of heating power consumption such as electric tracing band in addition, the energy saving.
To achieve these objects and other advantages in accordance with the purpose of the invention, there is provided a novel geothermal well structure, including:
the pumping well is provided with a water pipe in the pumping well, the water pipe extends out of the pumping well and then is connected with an external heat exchange system, the heat exchange system is externally connected with a water return pipe, and the water return pipe is connected with a recharge well;
wherein the dip well comprises: a water collecting section at the lower part and a water running section at the upper part; the pipe wall of the water production section pipeline is a wire-wound filter screen, and the water running section is a cement well wall; a sealing layer is arranged between the water running section and the water production section; a water pipe is arranged in the pumping well, and one end of the water pipe penetrates through the sealing layer and extends into the water production section; a heating pipe is arranged at the position, close to the water production section, of the lower part of the water running pipe of the water running section, and two ports of the heating pipe are communicated with the sealing layer and connected with the water production section;
be equipped with heat preservation pipe system on the pipe wall of walking water pipe, heat preservation pipe system includes: the heat preservation pipes are mutually communicated and connected with an oil pump; each group of heat preservation pipes is divided into an upper straight pipe and a lower annular pipe, the annular pipes are communicated with the straight pipes, and the annular pipes are close to the heating pipes; the heating pipe and the heat preservation pipe are partially overlapped, interacted and not communicated; the liquid in the heat-insulating pipe is any one of edible oil, heat-conducting oil or silicone oil;
the heat exchange system is used for using hot water from the geothermal well for urban heating or power generation;
and the recharging well is used for recharging the heat exchange system to obtain the return water after heat exchange and discharging the return water into the underground again.
Preferably, the liquid in the heat-insulating pipe is heat-conducting oil.
Preferably, the winding mode of the heating pipe is a spiral type or a coil type.
Preferably, a heat insulation layer is arranged between the straight pipe at the upper part of the heat preservation pipe and the ring pipe at the lower part of the heat preservation pipe, and a layer of heat preservation and heat insulation film is coaxially sleeved outside the water flowing pipe of the straight pipe at the upper part of the heat preservation pipe.
Preferably, a filter cartridge is arranged in the recharging well.
Preferably, the ratio of the diameter of the heating pipe to the diameter of the straight pipe of the heat preservation pipe is 1: 3.2.
preferably, the ratio of the diameter of the straight pipe of the thermal insulation pipe to the diameter of the ring pipe of the thermal insulation pipe is 3.2: 1.
preferably, the pumping well wellhead is provided with a well cover matched with the pumping well wellhead in size.
The utility model discloses at least, include following beneficial effect:
the optimization of the geothermal well heat taking mode is realized by utilizing the substantial property difference and the heat conduction condition of different liquids and the proper selection of the pipe diameter proportion of the heating pipe and the heat preservation pipe, the heat preservation pipe of a closed circulating system is used as a heat preservation material, the heat preservation pipe is connected with an oil pump and used as a power driving device, the rapid heat transfer of different parts on the heat preservation pipe is realized, the heat energy loss in the heat energy utilization process of the geothermal well is further reduced, the heat energy utilization rate is improved, and the temperature of geothermal water when the geothermal water is discharged from the well is effectively ensured;
adopt bionics principle to set up the insulating tube at the walking water pipe outer wall of geothermal well, the insulating tube adopts the ring canal with the heating pipe is close to the position, and the diameter of ring canal is little, and the pipe number is many, can carry out abundant heat exchange with the heating pipe, and the relative ring canal of pipe diameter of upper portion straight tube is bigger, and the velocity of flow is slow, can prolong heat conduction time, plays permanent heat retaining effect.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
Fig. 1 is a schematic structural diagram of a novel geothermal well structure according to one technical scheme of the invention;
fig. 2 is a schematic structural view of a pumpingwell according to one embodiment of the present invention;
fig. 3 is a schematic view of a structure of a pumping well when the heating pipe is coiled in a serpentine shape according to one of the technical solutions of the present invention;
fig. 4 is a schematic structural view of the heat preservation pipe according to one of the technical solutions of the present invention.
Detailed Description
The present invention is further described in detail below with reference to the drawings so that those skilled in the art can implement the invention with reference to the description.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
As shown in fig. 1-4, the utility model provides a novel geothermal well structure, include:
the water pumping well comprises a pumping well 1 and a water delivery pipe 3 arranged in the pumping well 1, wherein the water delivery pipe 3 extends out of the pumping well 1 and then is connected with a water suction pump 302, and is externally connected with a heat exchange system 4 or a hot water pipeline after penetrating through the water suction pump 302, the heat exchange system 4 is connected with a water return pipe 5, and the water return pipe 5 is connected with a recharge well 2; wherein, the hot water pipeline can be used for supplying town hot water, and the heat exchange system 4 can be used for converting energy and converting heat energy into other forms of energy such as electric energy and the like;
wherein the pumping well 1 comprises: a water collecting section at the lower part and a water running section at the upper part;
the pipe wall of the pipeline at the water collection section is provided with the wire-wound filter screen 101, the smoothness of water resource filtration can be effectively ensured by adopting the wire-wound filter screen 101, the opening area is large, the service life of the geothermal well is prolonged, and meanwhile, the wire winding and the supporting wire are connected by electric welding, so that the geothermal well is firm and durable;
the water running section is a cement well wall which is a preset concrete pipeline and is simultaneously lowered when the geothermal well is drilled; a sealing layer 102 is arranged between the water running section and the water collecting section, the edge of the sealing layer is connected and closed with the lower end of a cement well wall of the water running section, and the sealing layer 102 is used for dividing the part in the pumping well into a plurality of different temperature intervals to prevent the heat energy of geothermal water to be extracted from being dissipated;
the water pipe 3 is coaxially arranged in the pumping well 1, one end of the water pipe 3 penetrates through the sealing layer 102 and extends into the water production section for water production, and the water pipe 3 is tightly and hermetically connected with the sealing layer 102 through screws and nuts; a heating pipe 103 is arranged at the position, close to the water production section, of the lower part of the water running pipe 3 of the water running section, two ports of the heating pipe 103 are communicated with the sealing layer 102 and connected with the water production section, so that geothermal water can flow through the heating pipe 103 and then return to the water production section, and a heating part extending back into the water running pipe 3 is obtained;
the pipe wall of walking water pipe 3 is gone up and is encircled along circumference and is equipped with insulating tube 4 systems, insulating tube 4 systems include: a plurality of groups of heat preservation pipes 4, wherein each group of heat preservation pipes 4 are communicated with each other, and the heat preservation pipes 4 are connected with an oil pump 403; the heat preservation pipe 4 is arranged close to the outer wall of the water flowing pipe and can be embedded on the outer wall of the water flowing pipe 3 to realize heat transfer as much as possible; each group of heat preservation pipes 4 is divided into an upper straight pipe 401 and a lower annular pipe 402, the annular pipe 402 is communicated with the straight pipe 401, and the annular pipe 402 is close to and overlapped with the heating pipe 103; the heating pipe 103 and the heat preservation pipe 4 are partially overlapped and interacted but not communicated, the overlapped position is the whole body of the heating pipe 103 and the lower ring pipe 402 part of the heat preservation pipe 4, the heating pipe 103 and the heat preservation pipe 4 are mainly used for conducting heat, heat energy is transferred upwards, and the water delivery pipe 3 close to the opening of the geothermal well pipe is used for realizing heat preservation work; the liquid in the heat-insulating pipe 4 is edible oil, heat-conducting oil or silicone oil; the technical scheme adopts edible oil;
the heat exchange system 4 is used for using hot water from a geothermal well for urban heating or power generation, and a valve is further arranged at a heating pipeline, so that whether heating is performed or not can be adjusted according to actual conditions, and waste of resources is prevented;
the recharging well 2 is used for recharging the backflow water obtained by the heat exchange of the heat exchange system 4 into the ground again to prevent geological change and collapse caused by excessive collection of the ground water; the main structure of the recharge well 2 is similar to that of the pumping well 1, a water return pipe 5 is arranged in the recharge well 2, and a circulating pump 7 is serially arranged at the part of the water return pipe 5 extending out of the recharge well.
In the technical scheme, the specific use process is that the oil pump 403 is firstly opened to carry out heat preservation work on the water outlet pipe 3, then the water suction pump 302 is opened to pump water, and the specific heat capacity of water is greater than that of edible oil due to the different properties of water and edible oil, so that the heat conductivity of the edible oil is better than that of water; heating is carried out under the same pressure, because of the characteristics of water, the temperature range of the water is limited due to the limit of the boiling point of the water, the boiling point is 100 ℃ under the atmospheric pressure, but the edible oil can be heated to higher temperature under the condition, namely, the temperature exceeds 100 ℃, when heat exchange is carried out, the two sides of heat conduction have larger temperature difference, which is more beneficial to heat dissipation and heat preservation, by adopting the technical scheme, the heat preservation pipe 4 of a closed circulation system is adopted as a heat preservation material, the heat preservation pipe 4 is connected with an oil pump as a power driving device, the rapid heat transfer of different parts on the heat preservation pipe 4 is realized, and further, the heat energy dissipation in the heat utilization process of the geothermal well is reduced, the heat energy utilization rate is improved, and the temperature of geothermal water when the geothermal water is discharged from the well is effectively ensured; adopt the bionics principle to set up insulating tube 4 at the 3 outer walls of walking water pipe of geothermal well, insulating tube 4 adopts ring pipe 402 near the position with heating pipe 103, and ring pipe 402's diameter is little, and the pipe number is many, can carry out abundant heat exchange with heating pipe 103, and the pipe diameter of upper portion straight tube 401 is bigger for ring pipe 402, and the velocity of flow is slow, can prolong heat conduction time, plays permanent heat retaining effect.
In another technical scheme, the winding mode of the heating pipe 103 is a spiral type or a coil type, and by adopting the technical scheme, the heat conduction can be more sufficient by changing the structure, and the heat conduction can be realized by extending the pipe pass through both the two structures.
In another kind of technical scheme, be equipped with the insulating layer between the straight tube 401 on the upper portion of insulating tube 4 and the ring pipe 402 of lower part, paste and be equipped with the coaxial cover in 3 outsides of the walking pipe of the straight tube 401 on the upper portion of insulating tube 4 and be equipped with one deck heat preservation heat insulating film 301, wherein, insulating layer and heat preservation heat insulating film 301 are the PVC material, adopt this technical scheme, can effectively completely cut off the contact of insulating tube 4 and air for the heat that it gived off supplies with in walking pipe 3 as far as, improve energy utilization efficiency, resources are saved.
In another kind of technical scheme, the cluster is equipped with cartridge filter 6 on the wet return 5 in the recharging well 2, and cartridge filter 6 sets up in the position that is close to the 2 well heads of recharging well, and the backward flow just can be discharged the underground through cartridge filter 6, and the inner tube wall of cartridge filter 6 is the screen cloth, and the screen cloth mesh number is 20 meshes, adopts this technical scheme, can effectually prevent recharging well 2 and block up, reduces the cost of maintenance in later stage.
In another technical scheme, the ratio of the diameter of the heating pipe 103 to the diameter of the straight pipe 401 of the heat preservation pipe 4 is 1: 3, adopt this technical scheme, adopt this proportion to set up heating pipe 103 and insulating tube 4, can improve the efficiency that insulating tube 4 was heated as far as, shorten heat exchange time, under the same condition promptly, reach the same heating temperature, adopt the heat exchange time that this proportion pipeline set up the cost shorter.
In another technical solution, the ratio of the diameter of the straight pipe 401 of the thermal insulation pipe 4 to the diameter of the annular pipe 402 of the thermal insulation pipe 4 is 3: 1, adopt this technical scheme, the pipe diameter of upper portion straight tube 401 is bigger for ring pipe 402, and the velocity of flow is slow, can prolong heat conduction time, plays the effect that keeps warm for a long time.
In another technical scheme, the well mouth of the pumping well 1 is provided with a well cover matched with the pumping well in size, and by adopting the technical scheme, the air convection at the upper part of the pumping well 1 can be effectively reduced, and the heat loss is prevented.
The number of apparatuses and the scale of the process described here are intended to simplify the description of the present invention. Applications, modifications and variations of the geothermal well structure of the invention will be apparent to those skilled in the art.
While the embodiments of the invention have been described above, it is not intended to be limited to the details shown, or described, but rather to cover all modifications, which would come within the scope of the appended claims, and all changes which come within the meaning and range of equivalency of the art are therefore intended to be embraced therein.

Claims (8)

1. Novel geothermal well structure, its characterized in that includes:
the pumping well is provided with a water pipe in the pumping well, the water pipe extends out of the pumping well and is externally connected with a heat exchange system, the heat exchange system is externally connected with a water return pipe, and the water return pipe is connected with a recharge well;
wherein the dip well comprises: a water collecting section at the lower part and a water running section at the upper part; the pipe wall of the water production section pipeline is a wire-wound filter screen, and the water running section is a cement well wall; a sealing layer is arranged between the water running section and the water production section; a water pipe is arranged in the pumping well, and one end of the water pipe penetrates through the sealing layer and extends into the water production section; a heating pipe is arranged at the position, close to the water production section, of the lower part of the water running pipe of the water running section, and two ports of the heating pipe are communicated with the sealing layer and connected with the water production section;
be equipped with heat preservation pipe system on the pipe wall of walking water pipe, heat preservation pipe system includes: the heat preservation pipes are mutually communicated and connected with an oil pump; each group of heat preservation pipes is divided into an upper straight pipe and a lower annular pipe, the annular pipes are communicated with the straight pipes, and the annular pipes are close to the heating pipes; the heating pipe and the heat preservation pipe are partially overlapped, interacted and not communicated; the liquid in the heat-insulating pipe is any one of edible oil, heat-conducting oil or silicone oil;
the heat exchange system is used for using hot water from the geothermal well for urban heating or power generation;
and the recharging well is used for recharging the heat exchange system to obtain the return water after heat exchange and discharging the return water into the underground again.
2. The novel geothermal well structure of claim 1, wherein the liquid in the heat-insulating pipe is a heat-conducting oil.
3. The novel geothermal well structure of claim 1, wherein the heating pipes are wound in a spiral or serpentine manner.
4. The novel geothermal well structure of claim 1, wherein a thermal insulation layer is arranged between the upper straight pipe and the lower annular pipe of the thermal insulation pipe, and a thermal insulation film is coaxially sleeved outside the water pipe of the upper straight pipe attached with the thermal insulation pipe.
5. A novel geothermal well structure as defined in claim 1, wherein a filter cartridge is provided in the recharge well.
6. The novel geothermal well structure of claim 1, wherein the ratio of the diameter of the heating pipe to the diameter of the straight pipe of the insulating pipe is 1: 3.2.
7. the novel geothermal well structure of claim 1, wherein the ratio of the diameter of the straight pipe of the insulating pipe to the diameter of the looped pipe of the insulating pipe is 3.2: 1.
8. the novel geothermal well structure of claim 1, wherein the pumping well wellhead is provided with a well cover matched with the pumping well wellhead in size.
CN202021127747.0U 2020-06-18 2020-06-18 Novel geothermal well structure Active CN212930535U (en)

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CN202021127747.0U CN212930535U (en) 2020-06-18 2020-06-18 Novel geothermal well structure

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113863497A (en) * 2021-08-30 2021-12-31 中国化学工程重型机械化有限公司 Special-shaped large-volume steel structure based on heating system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113863497A (en) * 2021-08-30 2021-12-31 中国化学工程重型机械化有限公司 Special-shaped large-volume steel structure based on heating system

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