A method and system for storing natural gas and heating by using an abandoned mine

Abstract

A system for storing natural gas and heating by using an abandoned mine, including an exhaust gas mine, a gas source heat pump and a heat exchange system, the exhaust mine has a goaf, a natural gas injection well and a natural gas production well, the natural gas injection well and the natural gas The gas production wells are all connected to the goaf, and are equipped with downhole safety valves, and the air intake end of the gas source heat pump is connected to the natural gas injection well, which can realize the full utilization of waste gas mine resources, effectively It solves the problem of waste of resources caused by the abandonment of existing coal mines, improves the reuse rate of abandoned mines, and promotes the transformation and development of resource-exhausted cities; it can realize the storage of excess natural gas in summer and take it out when gas is used in winter. It not only expands the storage space of natural gas, but also effectively relieves the pressure of natural gas supply during the peak demand period, bringing more economic benefits.

Description

technical field [0001] The invention belongs to the field of new energy development and application, and relates to a method and a system for storing natural gas and heating by using an abandoned mine. Background technique [0002] Natural gas has the advantages of low price and environmental protection. It has become the main household fuel for residents, and the use of natural gas for heating has gradually become a trend. However, the use of natural gas for heating is mostly concentrated in winter, which leads to a sharp increase in the supply and demand of natural gas in winter, and the phenomenon of insufficient natural gas storage is prone to occur, while the demand for natural gas in summer is significantly lower than that in winter, resulting in excess natural gas reserves. In addition, the air source heat pump is currently the most widely used heat pump system. Due to the cold winter in the north, the heat pump efficiency will be greatly reduced as the outdoor temper...

AI Technical Summary

Problems solved by technology

However, at present, a large number of abandoned coal mines are in an abandoned state, and the underground space has not been fully utilized, which has caused a waste of abandoned coal mine resources

In addition, abandoned coal mines are usually located deep underground, and the temperature of the gas released from the abandoned mines is relatively high. However, this part of the heat has not been utilized at present, which also causes a waste of thermal energy resources.

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