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CN-224215583-U - Non-interference single well heat-taking underground heat exchange device

CN224215583UCN 224215583 UCN224215583 UCN 224215583UCN-224215583-U

Abstract

The utility model relates to the technical field of non-interference single-well heat taking, in particular to a non-interference single-well heat taking underground heat exchange device, which comprises a stratum, wherein a high-temperature heat storage layer is arranged at the bottom of the stratum, a reforming well is arranged in the stratum, a heat exchange mechanism is arranged in the reforming well and comprises a well wall sleeve fixedly connected to the inner wall of the reforming well, a circulating pipeline is fixedly connected to the inside of the well wall sleeve, a heat insulation plate is fixedly connected between the inner walls of the circulating pipeline, a low-temperature water inlet pipe and a high-temperature water outlet pipe are respectively communicated with the two sides of the top of the circulating pipeline, and a heat exchanger is communicated with the bottom of the circulating pipeline. Compared with the prior art, the utility model effectively replaces the traditional gas heating furnace or electric heating mode, realizes low-energy consumption and low-emission water heating, meets the requirement of resident heat supply, ensures the dynamic balance of geothermal heat storage, and constructs a high-efficiency low-carbon heat supply structure integrating underground heat exchange, heat pump heating and hot water circulation.

Inventors

  • CUI GUOHUA
  • XUE LULU

Assignees

  • 山东明合地热能源开发有限公司

Dates

Publication Date
20260508
Application Date
20250804

Claims (7)

  1. 1. The underground heat exchange device for the single-well heat taking without interference comprises a stratum (18), a high-temperature thermal storage layer (19) is arranged at the bottom of the stratum (18), a reforming well (1) is arranged in the stratum (18), and is characterized in that a heat exchange mechanism is arranged in the reforming well (1), the heat exchange mechanism comprises a well wall sleeve (2) fixedly connected to the inner wall of the reforming well (1), a circulating pipeline (3) is fixedly connected to the inside of the well wall sleeve (2), a heat insulating plate (4) is fixedly connected between the inner walls of the circulating pipeline (3), a low-temperature water inlet pipe (5) and a high-temperature water outlet pipe (6) are respectively communicated with the two sides of the top of the circulating pipeline (3), a heat exchanger (7) is communicated with the bottom of the circulating pipeline (3), two isolation plates (8) are fixedly connected between the joints of the circulating pipeline (3) and the heat exchanger (7), two communication pipes (14) are fixedly connected between the opposite surfaces of the two isolation plates (8), a plurality of first heat exchange pipes (9) and second heat exchange pipes (9) for heat exchange are fixedly connected with the inner pipes (10) respectively, the two heat exchange covers (10) are respectively communicated with the bottom of the two heat exchange pipes (10), the bottom ends of the first heat exchange inner pipe (9) and the second heat exchange inner pipe (10) are respectively communicated with the inner wall of the blind cover seal head (11), the bottom of the blind cover seal head (11) is fixedly connected with a water pump (12), and the bottom of the heat exchanger (7) is fixedly connected with a high-temperature hot water pipe (13).
  2. 2. The non-interference single-well heat-taking underground heat exchange device according to claim 1, wherein the side wall of the isolation plate (8) is provided with a communication port (15), and the two sides of the top of the heat exchanger (7) are provided with water outlets (16).
  3. 3. The non-interfering single well heat extraction downhole heat exchange device according to claim 1, wherein the diameter of the outer wall of the heat exchanger (7) is smaller than the diameter of the inner wall of the borehole wall casing (2).
  4. 4. The non-interference single well heat-taking downhole heat exchange device according to claim 1, wherein the side wall of the well wall sleeve (2) is communicated with a branch pipe (17) for low-temperature circulating backwater.
  5. 5. A non-interfering single well heat extraction downhole heat exchange device according to claim 4, wherein the high temperature hot water pipe (13) and the lateral pipe (17) are inside a high temperature thermal reservoir (19).
  6. 6. The non-interference single-well heat-taking underground heat exchange device according to claim 1, wherein one end of the high-temperature water outlet pipe (6) far away from the circulating pipeline (3) is fixedly connected to the input end of the multi-source heat pump unit, the output end of the multi-source heat pump unit is fixedly connected with a heat exchanger, and one end of the low-temperature water inlet pipe (5) far away from the circulating pipeline (3) is fixedly connected to the backwater end of the heat exchanger.
  7. 7. The non-interference single well heat extraction downhole heat exchange device according to claim 1, wherein the water pump (12) extracts underground high temperature water and then conveys the extracted underground high temperature water into the heat exchanger (7) and exchanges heat with softened water in the second heat exchange inner tube (10) and the first heat exchange inner tube (9).

Description

Non-interference single well heat-taking underground heat exchange device Technical Field The utility model relates to the technical field of underground heat exchange, in particular to a non-interference single-well heat-taking underground heat exchange device. Background With the continuous improvement of the development and utilization demands of clean energy, geothermal energy is taken as a green, renewable and stable energy form, and is increasingly paid attention to the energy field. The medium-deep geothermal resource has the characteristics of high temperature, large reserve, strong stability and the like, is widely applied to the fields of regional heating and the like, and the demand of the regional heating on heat energy is increasing at present, especially in northern and alpine regions of China, and the central heating of residents usually depends on an external heating station to heat water and then convey the heated water to living areas through a pipe network. However, the heat source used for heating water still depends on a large amount of coal-fired boilers, gas heating furnaces or electric heating matched heat exchangers for heat exchange, and the problems of high energy consumption, large carbon emission, high running cost and the like of the traditional heat supply modes generally exist. The existing partial area heating or crude oil heating generally adopts a gas heating furnace or an electric heating mode to provide heat energy, particularly in northern China and alpine regions, resident central heating still depends on a coal-fired boiler, a gas heating furnace or an electric heating system in a large quantity, and the traditional heating modes have the problems of high energy consumption, high operation cost, low heat efficiency, serious carbon emission and the like, and the prior art cannot reform according to a large quantity of abandoned or idle oil-gas wells in oil fields and industrial areas, and combines underground heat exchange and ground heat pump combined operation to obtain geothermal resources and meet resident or area heating requirements, so that energy shortage is increased, adverse effects are caused on environmental protection and air quality, and the requirements of current energy conservation and emission reduction and double carbon targets are difficult to meet. Therefore, there is a need to develop a downhole medium-deep geothermal heat exchange mechanism suitable for residential heating heat requirements to achieve clean, low-carbon, sustainable heating goals. Disclosure of utility model Therefore, the utility model aims to provide an interference-free single-well heat-taking underground heat exchange device, which solves the problems that the existing device cannot be modified according to the existence of a large number of abandoned or idle hydrocarbon wells in oil fields and industrial areas, and can be used for efficiently acquiring geothermal resources and meeting heating requirements of residents or areas by combining underground heat exchange and ground heat pump operation. Based on the above object, the utility model provides an undisturbed single-well heat-taking downhole heat exchange device, which comprises a stratum, wherein a high-temperature heat reservoir layer is arranged at the bottom of the stratum, a reforming well is arranged in the stratum, a heat exchange mechanism is arranged in the reforming well, the heat exchange mechanism comprises a well wall sleeve fixedly connected to the inner wall of the reforming well, a circulating pipeline is fixedly connected to the inside of the well wall sleeve, a heat insulation board is fixedly connected between the inner walls of the circulating pipeline, a low-temperature water inlet pipe and a high-temperature water outlet pipe are respectively communicated with the two sides of the top of the circulating pipeline, a heat exchanger is communicated with the bottom of the circulating pipeline, two isolation plates are fixedly connected between the connecting parts of the circulating pipeline and the heat exchanger, two communicating pipes are fixedly connected between the opposite surfaces of the two isolation plates, a plurality of first heat exchange inner pipes and second heat exchange inner pipes for heat exchange are arranged in the heat exchanger, the first heat exchange inner pipes and the second heat exchange inner pipes are respectively communicated with the two communicating pipes, a blind cover end enclosure is fixedly connected to the bottom of the heat exchanger, a water pump is fixedly connected to the bottom of the heat exchanger, and the bottom of the heat exchanger is fixedly connected with a blind cover. Preferably, the side wall of the isolation plate is provided with a communication port, and both sides of the top of the heat exchanger are provided with water outlets. Preferably, the diameter of the outer wall of the heat exchanger is smaller than the diameter of the inner wall of th