Heat storage type geothermal energy full-well-section dry well heat collection system and application

Abstract

The invention relates to a heat storage type geothermal energy full-well-section dry well heat collection system, the system comprises a heat collection and supply unit and an underground heat collection unit, the underground heat collection unit comprises a center pipe, the center pipe is coaxially sleeved with a sleeve, the center pipe is inserted into and penetrates through a low-temperature layer and a high-temperature layer of a geothermal well, and the sleeve is inserted into the low-temperature layer. The heat collection system comprises a heating loop and a heat storage loop, and is further innovatively provided with a preheating and heat preservation loop, and the preheating and heat preservation loop is composed of a heat pump unit, an outer-layer water injection pump, an outer-layer water injection valve, an outer-layer channel, an inner-layer channel, an inner-layer water suction pump and a bypass valve. The system breaks the dependence of a geothermal heating building group on a hydrothermal geothermal heating system, dry geothermal wells without water or with less water yield can be converted into a single-well mining system, each geothermal well is fully utilized, and the number of the geothermal wells can be reduced under the same heating condition, so that the initial investment of the geothermal heating system is reduced, and the economic advantage highlighting.

Description

technical field [0001] The invention belongs to the field of exploitation and utilization of geothermal resources, and relates to a technology for exploitation and utilization of deep carbonate rock geothermal resources, in particular to a heat storage type geothermal energy full well section dry well heating system and its application. Background technique [0002] With the rapid development of my country's economic construction, the demand for energy is increasing rapidly. Traditional energy such as coal has a serious impact on the ecological environment. Increasing the development and utilization of clean and renewable energy is an important measure to change the energy development mode and adjust the energy structure. [0003] Deep carbonate rock geothermal resources, as a clean energy source, are getting more and more attention in northern heating. For the development of mid-deep geothermal energy, the current domestic main mode is mining and extracting groundwater hot w...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a method that can effectively solve the serious heat loss and low outlet water temperature existing in the existing syst...

Images