Geothermal utilization device

Abstract

The invention discloses a geothermal utilization device. The geothermal utilization device comprises a water intake well and a water return well, the water intake well comprises a deep well pump layer I, a light pipe layer I and a heat exchange layer I, the water return well comprises a deep well pump layer II, a light pipe layer II and a heat exchange layer II, the heat exchange layer I and the heat exchange layer II are perforated pipes, after entering a geological heat layer, the heat exchange layer I and the heat exchange layer II simultaneously extend in the direction away from the centers of the water intake well and the water return well after being bent and turned for the first time, the distance between the heat exchange layer I and the heat exchange layer II is far larger than the distance between the light pipe layer I and the light pipe layer II, and the tails of the heat exchange layer I and the heat exchange layer II closely intersect with each other through secondary turning. Compared with the prior art, the geothermal utilization device has the advantages that regular exchange of pumping and returning is realized, and the problem of return water blockage can be solved; all pumping wells and return water wells are centrally arranged on the ground, underground heat collection is radially arranged, the heat collection area is large, the engineering floor area is small, and the construction cost is low; and each group of heat collecting perforated pipes are stereoscopically arranged in the geological heat layer, so that the geothermal utilization rate is high.

Description

technical field [0001] The invention relates to a geothermal utilization device. Background technique [0002] At present, there are two modes of geothermal exploitation in the prior art: the first mode is the mode of one pumping and two circuits. Although this mode has a high thermal utilization rate, it has the following two disadvantages: the first is that it occupies a large area of ​​the ground, and the construction The cost is high, and the second is that the flower pipe of the backwater well is easy to block after a long time. The second mode is U-shaped heat exchanger for underground heat exchange. The disadvantage of this method is that the heat exchange area is small (caused by construction personnel), and it is not suitable for large-scale heating projects. Therefore, it is a technical problem to be solved at present to design a geothermal utilization device that occupies a small ground area and is not suitable for blockage of the return water flower pipe. Cont...

AI Technical Summary

Problems solved by technology

The functions of the intake well and the return well alternate in a certain time interval, which solves the problem of blockage of the return water flower pipe

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