Geothermal single-well reinforced heat exchange system

Abstract

The invention discloses a geothermal single-well reinforced heat exchange system. The system comprises an artificial porous system arranged in the middle of an underground compact rock layer, a heat-taking heating assembly arranged on the ground surface and an underground heat-collecting assembly arranged underground; the underground heat-collecting assembly comprises a geothermal well penetratingthrough the compact rock layer and the artificial porous system which are arranged underground, and a heat preservation pipe arranged in the middle of the geothermal well; and a metal well wall is adopted for the geothermal well, a water outlet channel is formed in the heat preservation pipe, an annular space between the heat preservation pipe and the metal well wall forms a water inlet channel,the heat preservation pipe is in communication with a well mouth and a well bottom of the geothermal well, and an upper screen pipe and a lower screen pipe are arranged at the part, at the artificialporous system, of the metal well wall. According to the geothermal single-well reinforced heat exchange system, through the reinforced heat exchange of the artificial porous system, the output power of the geothermal single well can be greatly improved, so that the situation that dry holes cannot be used without water is avoided, the utilization rate of punching is effectively improved, and the investment risk of enterprises is reduced.

Description

technical field [0001] The invention relates to geothermal heating technology, in particular to a geothermal single well enhanced heat exchange system. Background technique [0002] The smog in northern my country is serious, especially the heating in winter has further aggravated the smog. At present, there is an urgent need for clean energy heating technology. As a kind of clean energy, geothermal energy has been paid more and more attention in northern heating. However, in the implementation process of geothermal heating at present, we are faced with the problem of high cost and high risk of geothermal exploration and drilling, especially when drilling hydrothermal geothermal wells, there are often dry holes without water, which increases the cost of the enterprise Investment risks hinder the rapid and large-scale promotion of geothermal heating to a certain extent. It is a pity to abandon geothermal wells with dry holes and no water. Although the use of single well clo...

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Problems solved by technology

However, in the implementation process of geothermal heating at present, we are faced with the problem of high cost and high risk of geothermal exploration and drilling, especially when drilling hydrothermal geothermal wells, there are often dry holes without water, which increases the cost of the enterprise Investment risks hinder the rapid and large-scale promotion of geothermal heating to a certain extent

It is a pity to abandon geothermal wells with dry holes and no water. Using single well closed cycle heating can recover some losses to a certain extent, but the single well output of this heating method is small

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