Deep-layer dry heat rock and medium-deep-layer geothermal source energy-gathering heat-exchange device

Abstract

The invention discloses a deep-layer dry heat rock and medium-deep-layer geothermal source energy-gathering heat-exchange device, belongs to the technical field of geothermal energy heat-taking devices, and solves the problem of low heat-taking efficiency of high-temperature heat exchange medium after heat exchange and pressure building in a well during the lowering process of a sleeve. The solution is that the device comprises a heat-taking device and a sliding sleeve, wherein the sliding sleeve is arranged below the heat-taking device; the heat-taking device comprises an outer heat-taking sleeve, a central sleeve and an insulation pipe; the insulation pipe is arranged on the central sleeve; and the side wall of the insulation pipe is provided with a hollow interlayer; the sliding sleevecomprises an energy-gathering sleeve, a sliding sleeve housing and a sliding sleeve connecting seat for connecting the energy-gathering sleeve with the sliding sleeve housing; and the central part ofthe sliding sleeve housing is provided with a sliding sleeve center pipe, and a pressure relief plug is fixedly installed on the inner side wall of the sliding sleeve center pipe through a fixed connecting column. According to the invention, the heat exchange medium input into the heat exchange device is increased, heat dissipation again of the high-temperature heat exchange medium after heat exchange during the transportation process in the well is avoided, the heat exchange efficiency is improved, and the pressure building in the well during the lowering process is avoided through arrangement of the sliding sleeve.

Description

technical field [0001] The invention belongs to the technical field of geothermal energy heat extraction devices, in particular to an energy-gathering heat exchange device for deep-layer hot dry rocks and mid-deep geothermal sources. Background technique [0002] The average geothermal gradient in my country is about 3°C / 100 meters. That is, below the constant temperature layer, the ground temperature increases by about 3°C ​​for every 100 meters downward. The ground is 1000-4000 meters underground, and the ground temperature is about 50-135 °C. The temperature of this part of deep geothermal resources is not enough to be developed and utilized for power generation, but it can become a stable heat source for building heating. [0003] At present, my country's utilization of mid-deep geothermal energy mainly adopts the method of directly exploiting mid-deep geothermal water for building heating, that is, digging geothermal wells in areas rich in geothermal water resources, ...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiencies of the existing technology and solve the technical problem that the high-temperature heat exchange medium after heat exchange dissipates heat again during the transportation process in the well and the heat extraction efficiency cannot be improved, the present invention provides a kind of deep dry hot rock, mid-deep geothermal source energy gathering heat exchange device

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