Deep and shallow combined geothermal field comprehensive development system

Abstract

The invention discloses a deep and shallow combined geothermal field comprehensive development system. The deep and shallow combined geothermal field comprehensive development system comprises a geothermal water circulating pipeline 1, a heat energy exchange tank 2 and an earth surface heat exchange device 3, wherein the geothermal water circulating pipeline 1 comprises a water taking pipeline 11,a heat exchange pipeline 12 and an infiltration pipeline 13, the water taking pipeline 11, the heat exchange pipeline 12 and the infiltration pipeline 13 are sequentially connected, the heat energy exchange tank 2 is located at the portion 10 meters to 20 meters below the earth surface, the heat energy exchange pipe 12 comprises a first heat energy exchange region 121 and a second heat energy exchange region 122, the earth surface heat exchange device 3 comprises a first heat exchange device 31 and a second heat exchange device 32, the first heat exchange device 21 corresponds to the first heat energy exchange region 121, the second heat exchange device 32 corresponds to the second heat energy exchange region 122. According to the deep and shallow combined geothermal field comprehensive development system, the stability of the heat exchange process is enhanced, the service life of a geothermal well is prolonged, the earth surface energy output is stable, the problems of corrosion to pipelines and equipment are solved, and the balance between supplement of geothermal water and improvement on water production efficiency is achieved.

Description

technical field [0001] The present invention generally relates to the field of energy exploitation, and more specifically relates to a comprehensive development system for combined deep and shallow geothermal fields. Background technique [0002] As clean energy, geothermal energy is renewable. At present, under the great demand of low-carbon environmental protection, it is necessary to develop geothermal energy. [0003] The existing geothermal resource collection system usually collects underground hot water directly to the ground and then utilizes it without recharging the used groundwater. This method will reduce the amount of underground hot water, and even cause ground subsidence in severe cases. It will also cause pollution to the environment because of the minerals contained in the hot water in the ground; another way is to collect the hot water in the ground, perform heat exchange on the surface for use, and then recharge it underground, but this heat exchange gene...

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Problems solved by technology

[0005] The problem to be solved by the present invention is to solve the problem of unstable output of surface energy due to instability of geothermal resources in the process of utilizing geothermal resources, and the problem of corrosion of pipelines and equipment caused by mineral precipitation in geothermal water, so as to improve the utilization of geothermal resources. To solve the problem of balance between the replenishment of groundwater by recharge water and the improvement of water extraction efficiency

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