Geothermal energy extraction device and method

Abstract

The invention discloses a geothermal energy extraction device and method. A gravity heat pipe of the device comprises an evaporation section, an adiabatic section, a condensation section and a backflow section, wherein the end, away from the adiabatic section, of the evaporation section is sealed; the evaporation section, the adiabatic section, the condensation section, a plate heat exchanger, thebackflow section and a gas-liquid separator are in butt joint end to end in sequence; the gas-liquid separator is arranged on one section of pipe wall of the adiabatic section in a sleeved mode; thegas-liquid separator is fixed to the section of pipe wall of the adiabatic section in a seamless welding mode; an independent space is formed between the interior of the gas-liquid separator and the section of pipe wall of the adiabatic section; the liquid outlet end of the space is a diversion hole arranged in the section of pipe wall; and a heat transfer pipe comprises a liquid inlet section anda liquid outlet section, wherein the liquid outlet end of the liquid inlet section and the liquid inlet end of the liquid outlet section are communicated with the interior of the plate heat exchangerrespectively. The method is realized through the operation of the device. The device and the method are environment-friendly and economical, pump work does not need to be consumed, meanwhile, the heat pipe is high in heat transfer speed and stable in heat transfer, and the heat energy exploitation efficiency can be improved.

Description

technical field [0001] The invention belongs to the field of geothermal energy exploitation, in particular to a two-phase closed thermosiphon type geothermal energy extraction device and a geothermal energy extraction method. Background technique [0002] Geothermal resources currently include shallow geothermal energy and deep underground geothermal energy. Shallow ground source heat energy, that is, ground source heat pump (Ground Source Heat Pump), refers to the position at a depth of several hundred to several kilometers below the ground, the general temperature will not exceed 25 ℃, this part of the heat energy is currently mainly used for household heating; The other part is deep underground geothermal energy, which is buried in hot dry rocks 3 to 10 kilometers away from the surface. The temperature of the rock formation is 150 to 650 °C. There is almost no water or steam in the formation, and it exists in a certain porosity and a small permeability. in the rock. Geo...

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Problems solved by technology

[0005] The primary purpose of the present invention is to provide a two-phase closed thermosiphon type geothermal energy extraction device, which aims to solve the problem of large loss of heat medium fluid in the underground circulation process and the heat recovery efficiency during the operation of the existing hot dry rock thermal energy exploitation system low level problem

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