Terrestrial heat utilization system based on underground diaphragm walls and utilization method thereof

Abstract

The invention provides a terrestrial heat utilization system based on underground diaphragm walls. The system comprises the first underground diaphragm wall, the second underground diaphragm wall andan underground water layer. A water input pipe and a first water output pipe are arranged on the first underground diaphragm wall. A second water output pipe and a third water output pipe are arrangedon the second underground diaphragm wall. The underground water layer communicates with a high-pressure water pump through the water input pipe. The water output end of the high-pressure water pump is sequentially connected with a first electric shunting type valve, a first high-pressure heat energy converter, a second electric shunting type valve, a second high-pressure heat energy converter andthe third water output pipe. The other water output end of the first electric shunting type valve is connected with the first water output pipe through a first grid type heat exchanger, and the otherwater output end of the second electric shunting type valve is connected with the second water output pipe through a second grid type heat exchanger. The invention further provides a utilization method of the geothermal utilization system based on the underground diaphragm walls. The system has the advantages of being large in energy, easy to utilize and the like, terrestrial heat is utilized reasonably, and thus benefits can be brought to economy and environment.

Description

technical field [0001] The invention relates to the technical field of geothermal utilization, in particular to a geothermal utilization system based on an underground continuous wall and a utilization method thereof. Background technique [0002] With the development of foundation pit engineering, more and more foundation pits tend to develop in deep, large and poor geological areas, and most of the foundation pit enclosure structures adopt reinforced concrete underground diaphragm walls. As the enclosure structure of the foundation pit, the underground diaphragm wall has the main advantages of good integrity, high rigidity, and good impermeability. In some deep and large foundation pits, the underground diaphragm wall enclosure structure has a deep insertion into the soil, a large cross-sectional area, and high cost, and its utilization rate is low only as an underground permanent enclosure structure. As a new type of renewable energy, geothermal energy is mainly stored b...

AI Technical Summary

Problems solved by technology

In some deep and large foundation pits, the underground diaphragm wall enclosure structure is deeply inserted into the soil, the cross-sectional area is large, and the cost is high, but the utilization rate of the underground permanent enclosure structure is low.

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