Multifunctional combined dry hot rock energy storage heating system

Abstract

The invention discloses a multifunctional combined dry hot rock energy storage heating system, which comprises a primary filtering reservoir, wherein the primary filtering reservoir is communicated with a secondary filtering reservoir; the secondary filtering reservoir is communicated with a recharge well straight well section through a transmission pipeline; the bottom end of the recharge well straight well section is communicated with the water inlet end of a dry hot rock water storage system through a recharge well inclined well section; the water outlet end of the dry hot rock water storage system is communicated with the bottom end of a geothermal water exploitation well straight well section through a geothermal water exploitation well horizontal well section; a submersible pump is arranged in the geothermal water exploitation well straight well section. According to the system, the exploitation efficiency of the dry hot rock can be improved by controlling the water injection time, the water injection amount and the water injection temperature, the temperature breakthrough time of the geothermal well is delayed, the problems of waste wind and waste light resources caused by wind power and photoelectric are comprehensively solved, and the wind power and photoelectric in a small area are used for heating geothermal tail water and ground surface replenishment cold water, sothat the sustainable development of the geothermal resources of the dry hot rock is ensured.

Description

Technical field [0001] The patent of the invention belongs to the field of geothermal development, and specifically relates to a multi-energy combined hot dry rock energy storage heating system, which is suitable for the exploitation of hot dry rock geothermal resources. Background technique [0002] Hot dry rock geothermal resources have the characteristics of green, low-carbon, clean and environmentally friendly, large reserves, and widely distributed, and are a kind of renewable energy that can be recycled. An effective way to develop hot dry rock geothermal resources is to establish enhanced geothermal system engineering, use drilling and completion technology to build injection wells and production wells, and use hydraulic fracturing technology to generate complex interlaced fracture systems in hot dry rock reservoirs. The fluid flow channel between the injection well and the production well is used for circulating heat. The geothermal energy stored in the dry hot rock is ex...

AI Technical Summary

Problems solved by technology

[0004] Aiming at problems such as the current low mining efficiency of hot dry rock geothermal development systems, premature temperature breakthroughs in geothermal wells, and ground subsidence induced by geothermal mining, the purpose of this invention is to provide a multi-energy combined hot dry rock energy storage heating system. The system can improve the efficiency of hot dry rock mining by controlling the water injection time, water injection volume and water injection temperature, delay the temperature breakthrough time of geothermal wells, thereby improve the service life of geothermal wells, and at the same time slow down the ground subsidence caused by geothermal mining, and ease the wellbore of geothermal water exploitation wells. Corrosion and fouling problems

Images