CN215979320U - Geothermal well group mining and irrigating mutual-reversing wellhead device - Google Patents
Geothermal well group mining and irrigating mutual-reversing wellhead device Download PDFInfo
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- CN215979320U CN215979320U CN202122452946.XU CN202122452946U CN215979320U CN 215979320 U CN215979320 U CN 215979320U CN 202122452946 U CN202122452946 U CN 202122452946U CN 215979320 U CN215979320 U CN 215979320U
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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
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- 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 utility model provides a geothermal well group mining and recharging mutual-reversing well head device, which comprises N groups of mutual-reversing well head devices, wherein N is more than or equal to 3, each mutual-reversing well head device comprises a well head device unit, an extraction system unit and a recharging system unit, the structure is simple, the device is applied to a multi-well group geothermal energy comprehensive utilization project, geothermal water adopts an extraction recharging mode, the heat exchange efficiency of a geothermal well is improved by utilizing a stratum underground water convection heat exchange mode, the recharging water adopts same-layer recharging and raw water recharging, 100 percent recharging rate is realized by combining stratum characteristics, the purposes of environmental protection and water resource protection are achieved, in a multi-port geothermal well group system, geothermal water extraction sand removal treatment, tail water filtration treatment, pressurization recharging equipment and the like are all arranged at the position of the wellhead of the geothermal well head and are connected with a main pipe network in parallel, the main pipe network is a fixed facility, the well head device system is an independent system, the operation of the main pipe network is not influenced by switching the mining and recharging functions of a single-port well, has the advantages of energy saving and environmental protection.
Description
Technical Field
The utility model belongs to the technical field of geothermal resource development, and particularly relates to a geothermal well group mining and irrigating mutual-dumping wellhead device for geothermal heat exchange.
Background
Geothermal energy is taken as renewable energy, has own unique advantage, and its reserves are abundant, the energy quality is higher, and the energy is more stable than other renewable energy, and the continuity is better, and geothermal resources have clean, low carbon, environmental protection's advantage simultaneously, and along with the progress and the completion of drilling technique, geothermal energy is from the shallow layer to the middle deep layer, and the utilization of different forms geothermal energy is all used in the heating practice.
Geothermal resources are divided into shallow geothermal resources, middle-deep geothermal resources and deep geothermal resources according to the buried depth, the middle-deep geothermal resources generally refer to geothermal energy contained in a stratum buried within 400-3000 m, geothermal production wells exceeding 5000m in the world are rare at present, the water outlet temperature of a middle-deep geothermal well generally applied to heating is 30-110 ℃, the depth is 3000m, the geothermal energy utilization is divided into a heat-taking water-free type (utilizing middle-deep buried pipes and concentric pipes of an underground heat exchanger) and a water-taking heat-exchange type (water-taking recharging type), the water-taking heat-exchange type extracts high-temperature underground water from the middle-deep geothermal well and conveys the high-temperature underground water to an energy station, the high-temperature underground water is converted into low-temperature geothermal tail water after heat exchange of energy station heat exchange equipment and heat pump units, the low-temperature geothermal tail water is conveyed to a recharging well through a geothermal pipe network, the geothermal water returns to the same underground stratum, and is circularly extracted after the stratum is heated. Geothermal water temperature and flow under different stratum environments are different, and according to geothermal water heat value, geothermal energy utilization maximization is achieved through direct heat exchange and multi-stage heat extraction by a heat pump unit in an energy station.
The heating project of the middle-deep geothermal well in the market at present is mostly composed of 1 group of water extraction recharging wells or 1 extraction 2-type geothermal wells, the use functions of the extraction wells and the recharging wells are determined at the initial stage of drilling, and due to the fact that the geothermal wells are few in number and do not have the backup performance and the adjustability, the heating project is not switched to use during the heating process. In some cases, the mutual inversion device of the water extraction and recharge wells is arranged at an energy station and is far away from the geothermal well, and the functions of the water extraction and recharge water conveying pipelines are also switched during switching, so that the water extraction and the tail water are communicated, and the water quality of the recharge water is influenced. Particularly, when the number of the geothermal wells is more than 3, the extraction capacity, the recharge capacity and the temperature of the geothermal wells can be changed in a correlated manner in use, the geothermal wells are required to be re-evaluated according to various parameters of the geothermal wells after long-term use and are more suitable for being used as extraction or recharge wells, and after the functions of the geothermal wells are re-evaluated, the extraction and recharge wells are required to be adjusted so as to improve the overall water extraction and heat recovery and recharge efficiency of a geothermal well group and prolong the service life of the geothermal wells.
SUMMERY OF THE UTILITY MODEL
Aiming at the explanation of the background technology, the utility model provides a mutual-reversing wellhead device for geothermal well group mining and irrigation, which realizes the mutual reversing of the switching of the mining and irrigation functions on the wellhead device without reforming a geothermal water system pipe network, and simultaneously improves the utilization rate, the performance stability and the operation sustainability of geothermal wells.
In order to achieve the purpose, the utility model provides the following technical scheme:
a geothermal well group mining and irrigating mutual-reversing wellhead device comprises N groups of mutual-reversing wellhead devices, wherein N is more than or equal to 3, and each mutual-reversing wellhead device comprises a wellhead device unit, an extraction system unit and a recharge system unit;
the wellhead device unit comprises a wellhead device main body, the wellhead device main body is provided with an extraction water pipe interface, a deep well submersible pump pipe interface, a tail water recharge pipe interface and an overflow pipe interface through pipelines, the extraction water pipe interface is provided with an extraction pipe butterfly valve, the deep well submersible pump pipe interface is connected with a geothermal extraction deep well submersible pump, the tail water recharge pipe interface is provided with a recharge pipe butterfly valve, and the overflow pipe interface is provided with an overflow drain valve;
the extraction system unit comprises a rotational flow sand remover, a flow meter, a temperature sensor and a pressure sensor which are connected to a pipeline, the extraction system unit is connected to an extraction pipe butterfly valve through the pipeline and is connected with a geothermal water supply main pipe network in parallel, a sand removing water outlet of the rotational flow sand remover is simultaneously used as a back-up water discharging unit, the back-up water discharging unit is connected with a back-up water discharging valve, and the back-up water discharging valve is connected to a sump through the pipeline;
the recharging system unit is connected with the geothermal water tail water main pipe network in parallel, comprises a primary filter, a secondary filter, a gas collection and exhaust device, an electronic water treatment device, a recharging pipeline, a recharging water flow meter and temperature and pressure sensors which are connected through pipelines, and is connected to a recharging pipe butterfly valve through a pipeline.
In the technical scheme, the extraction system unit and the recharge system unit are connected with the wellhead device unit through pipelines and are connected with the geothermal water extraction pipe network and the tail water pipe network in parallel.
In the technical scheme, the recharging pipeline is divided into a pressurizing recharging pipeline and a bypass natural recharging pipeline, the pressurizing recharging pipeline comprises a communicating valve, a pressurizing pump and a check valve which are sequentially connected through pipelines, and the bypass natural recharging pipeline comprises a pressurizing bypass valve and a check valve which are sequentially connected through pipelines.
In the technical scheme, the pressurizing recharge pipeline and the bypass natural recharge pipeline are connected in parallel.
The geothermal well group system is simple in structure, is applied to a project of comprehensively utilizing geothermal energy of multiple well groups, adopts an extraction recharge mode for geothermal water, utilizes a convection heat exchange mode of stratum underground water, improves the heat exchange efficiency of geothermal wells, adopts same-layer recharge and raw water recharge for recharge of the recharge water, combines stratum characteristics, realizes 100% recharge rate, and achieves the purposes of environmental protection and water resource protection.
Drawings
In order to more clearly illustrate the embodiments of the patent of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the patent of the present invention, and other drawings can be obtained by those skilled in the art without inventive exercise.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the present invention;
the system comprises a wellhead device main body 1, a water production electric valve 2, a water return electric valve 3, a water extraction flowmeter 4, a water recharging flowmeter 5, a rotational flow desander 6, a water pumping valve 7, a pressurizing bypass valve 8, a pressurizing water pump 9, a gas collecting and exhausting device 10, a first-stage filter 11, a second-stage filter 12, an electronic water treatment device 13, a recharging pipe butterfly valve 14, a pumping pipe butterfly valve 15, an overflow water pumping valve 16, a pumping main pipe valve 17, a tail water main pipe valve 18, a submersible pump 19, a pumping unit 20, a recharging unit 21, a wellhead device unit 22, a pumping pipe network 23 and a tail water pipe network 24.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given in the present patent application without inventive step, shall fall within the scope of protection of the present patent application.
According to the embodiment shown in fig. 1, a geothermal well group mining and irrigating mutual-reversing wellhead device is shown as an example, and is suitable for a geothermal well group with the well number N being more than or equal to 3, the example takes 4 heating wells as an example, and specifically describes an implementation of the utility model.
The mutual-reversing wellhead device comprises a wellhead device unit, an extraction system unit and a recharge system unit.
The wellhead device unit comprises a wellhead device main body and is characterized in that the wellhead device main body mainly comprises a drainage water pipe interface for heat extraction, a deep well submersible pump pipe interface, a geothermal well casing pipe interface, an underground liquid level sensor interface, a deep well submersible pump, a submersible pump cable interface and other hardware structures, the wellhead device main body and a geothermal well casing pipe have the same caliber and are in flange connection with the geothermal well casing pipe, a hemispherical end cover is arranged at the upper part of the wellhead device main body, a drainage water pipe and water pump pipe interface is arranged at the upper center of the end cover, the submersible pump cable interface and the underground liquid level meter interface are arranged around the wellhead device main body, the end cover is in flange connection with the main body, the wellhead device main body is equipment in the prior art, and the wellhead device main body is not the key content of explanation of the utility model. The wellhead device main body is provided with an extraction water pipe interface, a deep well submersible pump pipe interface, a tail water recharge pipe interface and an overflow pipe interface through pipelines, wherein the extraction water pipe interface is provided with an extraction pipe butterfly valve, the deep well submersible pump pipe interface is connected with a geothermal extraction deep well submersible pump, the tail water recharge pipe interface is provided with a recharge pipe butterfly valve, the overflow pipe interface is provided with an overflow drain valve, the purposes that the extraction water pipe interface, the tail water recharge pipe interface and the overflow port of the water extraction submersible pump are respectively arranged, a bypass is not arranged between the recharge pipe and the water extraction pipe, and each interface can be independently used are achieved. During installation, the wellhead device main body is connected with a geothermal well casing pipe flange, then the submersible pump, the pump pipe, the pump cable and the liquid level sensor are installed, after the submersible pump reaches a set depth, the pump pipe is connected with the wellhead device end cover through the flange, and then the end cover is connected with the main body. When the wellhead device unit is installed, the extraction pipe butterfly valve, the recharge pipe butterfly valve and the overflow drain valve on the water extraction connecting pipe, the tail water connecting pipe and the overflow drain connecting pipe are in an open state, the valves of the extraction pipe butterfly valve, the recharge pipe butterfly valve and the overflow drain valve are closed after installation is completed, and the sealing condition of the connecting point is checked. The overflow drain valve is used for installing a pump pipe in the positive pressure well and relieving pressure and guiding flow of well water during maintenance.
The extraction system unit comprises a cyclone sand remover, a flow meter and temperature and pressure sensors which are connected to a pipeline, the extraction system unit is connected to an extraction pipe butterfly valve through the pipeline and is connected with a geothermal water supply main pipe network in parallel, extracted water is extracted through a submersible pump and enters a water extraction main pipe network after being desanded by the cyclone sand remover, the cyclone sand remover is a customized device, the diameter of a sand removal water outlet of the cyclone sand remover is larger than the specification of a conventional sand remover water outlet and smaller than a sand remover water inlet, the sand removal water outlet of the cyclone sand remover is simultaneously used as a back-lifting water outlet unit, the back-lifting water outlet unit is connected with a back-lifting water outlet valve, the back-lifting water outlet valve is connected to a water collecting pit through the pipeline, the sand removal water outlet is a sand discharge port in an extraction mode and is used as a back-lifting water outlet in a back-filling program intermittent back-lifting mode, and the extraction system unit is connected with a pipeline type electromagnetic flowmeter.
The recharging system unit is connected with the geothermal water tail water main pipe network in parallel, comprises a primary filter, a secondary filter, a gas collection and exhaust device, an electronic water processor, a recharging pipeline, a recharging water flow meter and temperature and pressure sensors which are connected through pipelines, and is connected to a recharging pipe butterfly valve through a pipeline. The recharging pipeline is divided into two paths which are connected in parallel, one path is a pressure pump recharging pipeline and the other path is a bypass natural recharging pipeline, the pressure pump recharging pipeline is a communicating valve, a pressure pump and a check valve which are sequentially connected through pipelines, the bypass natural recharging pipeline is a pressure bypass valve and a check valve which are sequentially connected through pipelines, and the pressure pump recharging pipeline is set to be a parallel one-use one-standby pipeline. The electronic water treatment device is used for sterilizing and algae removing treatment of tail water, the filtering precision of the primary filter is 5-10 microns, and the filtering precision of the secondary filter is 3-5 microns. The primary filter and the secondary filter are connected in series, a bypass valve is arranged at the water inlet and the water outlet of the two-stage filter and used for equipment maintenance, the gas collection and exhaust device is arranged behind the secondary filter, the automatic exhaust valve is arranged at the top of the gas collection tank, and the recharge water flow meter adopts a pipeline type electromagnetic flow meter.
When the geothermal well is a recharge well, an extraction pipe butterfly valve and an extraction main pipe valve at the inlet and the outlet of an extraction system unit are closed, a recharge pipe butterfly valve and a tail water main pipe valve of the recharge system unit are opened and are communicated with a tail water main pipe network, tail water is subjected to water treatment through an electronic water treatment device, primary filtration, secondary filtration and gas collection and exhaust, and then flows back into the geothermal well in two modes of natural recharge and pressurized recharge according to main pipe pressure through a recharge pipeline after the water quality meets the geothermal tail water recharge requirement. When the recharge flow does not meet the design value, intermittent recharge measures need to be taken, a tail water main pipe valve and a recharge pipe butterfly valve are closed, a drainage pipe butterfly valve and a recharge drain valve are opened, and the submersible pump is started to carry out recharge drainage. And the extraction main pipe valve is kept closed during the pumping, and the pumped water cannot enter the extraction water pipe network due to the low temperature of the pumped water and needs to be discharged through a pumping water discharge valve.
When the geothermal well is an extraction well, the butterfly valves of the extraction pipe and the butterfly valve of the extraction main pipe of the extraction system unit are opened, the deep well submersible pump is started, and geothermal water enters the extraction water main pipe network after passing through the cyclone sand remover.
The water extraction electric valve and the water return electric valve are arranged on pipelines of the extraction system unit and the recharge system unit, so that the remote control of the pipelines and the linkage function of the submersible pump and the pressure pump can be realized.
Each well in the geothermal well group adopts the facilities, and the pumping and recharging functions of any well can be independently changed according to the temperature of geothermal water and the water demand.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and shall be covered by the protection scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the protection scope of the claims.
Claims (4)
1. The utility model provides a mutual wellhead assembly that falls is adopted and irritated to geothermol power well crowd which characterized in that: the system comprises N groups of mutually-reversed wellhead devices, wherein N is more than or equal to 3, and each mutually-reversed wellhead device comprises a wellhead device unit, an extraction system unit and a recharge system unit;
the wellhead device unit comprises a wellhead device main body, the wellhead device main body is provided with an extraction water pipe interface, a deep well submersible pump pipe interface, a tail water recharge pipe interface and an overflow pipe interface through pipelines, the extraction water pipe interface is provided with an extraction pipe butterfly valve, the deep well submersible pump pipe interface is connected with a geothermal extraction deep well submersible pump, the tail water recharge pipe interface is provided with a recharge pipe butterfly valve, and the overflow pipe interface is provided with an overflow drain valve;
the extraction system unit comprises a rotational flow sand remover, a flow meter, a temperature sensor and a pressure sensor which are connected to a pipeline, the extraction system unit is connected to an extraction pipe butterfly valve through the pipeline and is connected with a geothermal water supply main pipe network in parallel, a sand removing water outlet of the rotational flow sand remover is simultaneously used as a back-up water discharging unit, the back-up water discharging unit is connected with a back-up water discharging valve, and the back-up water discharging valve is connected to a sump through the pipeline;
the recharging system unit is connected with the geothermal water tail water main pipe network in parallel, comprises a primary filter, a secondary filter, a gas collection and exhaust device, an electronic water treatment device, a recharging pipeline, a recharging water flow meter and temperature and pressure sensors which are connected through pipelines, and is connected to a recharging pipe butterfly valve through a pipeline.
2. A geothermal well group mutual inversion wellhead assembly as claimed in claim 1, wherein: the extraction system unit and the recharge system unit are connected with the wellhead device unit through pipelines and are connected with the geothermal water main pipe network in parallel.
3. A geothermal well group mutual inversion wellhead assembly as claimed in claim 2, in which: the recharging pipeline is divided into a pressurizing recharging pipeline and a bypass natural recharging pipeline, the pressurizing recharging pipeline comprises a communicating valve, a pressurizing pump and a check valve which are sequentially connected through pipelines, and the bypass natural recharging pipeline comprises a pressurizing bypass valve and a check valve which are sequentially connected through pipelines.
4. A geothermal well group mutual inversion wellhead assembly as claimed in claim 3, in which: the pressurizing recharging pipeline and the bypass natural recharging pipeline are arranged in parallel.
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| CN202122452946.XU CN215979320U (en) | 2021-10-12 | 2021-10-12 | Geothermal well group mining and irrigating mutual-reversing wellhead device |
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| CN202122452946.XU CN215979320U (en) | 2021-10-12 | 2021-10-12 | Geothermal well group mining and irrigating mutual-reversing wellhead device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114412416A (en) * | 2022-03-09 | 2022-04-29 | 山东省鲁南地质工程勘察院(山东省地质矿产勘查开发局第二地质大队) | Heat reservoir and conveying pipeline pump-lifting-free descaling device and using method |
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2021
- 2021-10-12 CN CN202122452946.XU patent/CN215979320U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114412416A (en) * | 2022-03-09 | 2022-04-29 | 山东省鲁南地质工程勘察院(山东省地质矿产勘查开发局第二地质大队) | Heat reservoir and conveying pipeline pump-lifting-free descaling device and using method |
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