Bi-directional filtered geothermal utilization heating system with hundred-percent water recharging function

Abstract

The invention relates to a bi-directional filtered geothermal utilization heating system with a hundred-percent water recharging function. The bi-directional filtered geothermal utilization heating system comprises a first water well, a second water well, a first well wall pipe arranged in the first water well, a first water sucking and draining device arranged in the inner hole of the first wellwall pipe, a second well wall pipe arranged in the second water well, a second water sucking and draining device arranged in the inner hole of the second well wall pipe and being the same as the firstwater sucking and draining device in structure, a first sand remover, a water outlet pipeline, a first two-position three-way electromagnetic valve, a first liquid outlet pipeline, a first liquid inlet pipeline, a second two-position three-way electromagnetic valve, a second liquid inlet pipeline, a second sand remover, a second liquid outlet pipeline and a heat exchanger used for heat supply output. The bi-directional filtered geothermal utilization heating system has the advantages of being reasonable in design, compact in structure and convenient in use.

Description

technical field [0001] The invention relates to a 100% recharged two-way filtration geothermal utilization heating system. Background technique [0002] At present, geothermal resources, as a kind of renewable energy, have been included in the "13th Five-Year" energy plan. How to make good use of geothermal resources is one of the ideal choices for energy conservation and emission reduction. [0003] The geothermal water is mined from the stratum to the ground for heat exchange utilization. The temperature and pressure of the geothermal water change, and the composition of the geothermal water after contact with the air changes. Blockages of different origins are formed, resulting in the reduction of the recharge flow of the thermal tail water in the sandstone thermal storage, the reduction of the recharge efficiency, and even the inability to recharge. The existing refilling device basically consists of a filter device, an exhaust device and a pressurized refilling pump i...

AI Technical Summary

Problems solved by technology

On the whole, the currently used recharging devices mainly have the following disadvantages: due to the wide range of suspended solids contained in the geothermal tail water, such facilities are likely to cause excessive workload of the filter during operation; on the other hand , even after being filtered, after a long time of recharging, the recharging well will also be clogged to varying degrees, resulting in a decrease in recharging efficiency

The recharge device failed to take into account the overall design of the entire system from mining to recharge, resulting in mutual interference in the hydraulic conditions of the pipeline

During the use of the quartz sand tank filter device, geothermal water with high salinity and complex composition is likely to cause agglomeration, which will reduce the filtering effect and is not easy to clean

The nitrogen protection device and the quartz sand tank occupy too large an area, so it is not easy to promote and use it on a large scale

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