Multi-well communication and circulating heating type deep subterranean heat extraction device

Abstract

The invention relates to a multi-well communication and circulating heating type deep subterranean heat extraction device. The device is characterized in that a plurality of deep wells with depth more than 3000m are drilled in the area with higher crust temperature, the bottoms of the wells are mutually communicated, and water purified by a purifier is injected and supplemented into the deep wells through pumps and valves; after the water is heated in the high-temperature area with the multiple deep wells, the water is lifted to the near ground from one well in the high-temperature and high-pressure type through a motor pump or a steam turbine pump, the hot water or the steam gasified by a gasifier is generated on the near ground and is supplied to a heater or a steam turbine generator, the steam turbine pump runs by the self steam, the water and gas after heat production are treated in a way similar to a power plant and a heating plant, and then are conveyed into the wells for circulating heating, and the hot water which is not gasified by the gasifier is also conveyed into the wells for circulating heating.

Description

technical field [0001] The invention relates to a new energy source, in particular to a multi-well connected circulation heating for extracting deep geothermal energy by raising deep geothermal energy to the surface. Background technique [0002] Coal, gas, and oil on the earth have only a handful of years to exploit, and wind, solar, water, and nuclear energy are all limited. The diameter of the earth is 13,000 kilometers, the average thickness of the crust on the surface is only about 18 kilometers, and the average thickness of the land crust is more than 30 kilometers. At a depth of more than 3,000 meters underground, the crustal temperature can reach more than 100°C. There is infinite energy under human feet. At present, domestic and foreign commercially operated geothermal is limited to raising ground hot water to the ground, which belongs to shallow geothermal. This can only be done in a few places with geothermal water, and large-scale exploitation will also cause ...

AI Technical Summary

Problems solved by technology

This method of extracting geothermal heat has the phenomenon of declining heat storage and power generation, and the total price is also high, so it has not been commercially operated.

There is also a method of extracting deep geothermal heat in a 10,000-meter-deep well. Water is vaporized at the bottom of the 10,000-meter-deep well. This kind of vaporization at the bottom of the well under hundreds of atmospheric pressures is difficult to implement, and at the same time, the cost is extremely high, and the economic significance is not great.

There is also a method of extracting geothermal heat from a single well. Suppose that the heat extracted from a deep well by a single well is 6, the loss in the lifting process is 5, and the effective extraction amount is only 1. The heat extracted by a single well is limited, and after subtracting the loss, there is not much left. In addition, the technology of simultaneous injection and extraction in a single well is also complicated

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