Underground in-situ gasification and pyrolysis integrated co-mining method for oil-rich coal

Abstract

The invention discloses an underground in-situ gasification and pyrolysis integrated co-mining method for oil-rich coal. The method comprises the following steps: 1, excavating a gasification injection channel, a gasification output channel and a gasification horizontal well in a lower layer coal seam of the oil-rich coal; 2, excavating a pyrolysis injection channel, a pyrolysis output channel and a pyrolysis horizontal well in an upper layer coal seam of the oil-rich coal; 3, excavating a filling channel and a filling hole, and filling the filling channel and the filling hole with a heat conduction material to form a heat conduction column; and 4, injecting a gasifying agent into a lower layer coal seam, igniting the gasifying agent for in-situ gasification, and conducting generated heat energy into the upper layer coal seam through the heat conduction column for heating in-situ pyrolysis. The channels are formed in the lower layer coal seam and the upper layer coal seam of the oil-rich coal respectively to form the independent oil-rich coal underground in-situ gasification system and the oil-rich coal underground in-situ pyrolysis system, and heat energy generated by in-situ gasification of the lower layer coal seam is used for carrying out in-situ pyrolysis on the upper layer coal seam, so that integration of underground in-situ gasification and pyrolysis of the oil-rich coal is realized; and the mining utilization rate of the oil-rich coal is improved, and heat energy waste is avoided.

Description

Technical field [0001] The present invention belongs to the technical field of coal mining rich, particularly to an oil-rich coal gasification and pyrolysis of the Underground Mining co-integration method. Background technique [0002] As my country's economy continues to develop, the demand for various types of energy, especially oil and gas resources is increasing, however, my country's energy resources has oil, less gas, coal is relatively rich endowment feature, so how relatively rich in coal resources better utilization has become an important part of my country's energy security strategy. Compared with conventional coal resources, coal oil-rich set as kerosene gas properties as one of the coal resources, with its unique characteristics enormous development potential oil and gas resources and high conversion rate and other resources has become the focus of concern. Full use of the oil-rich coal characteristics to achieve oil-rich coal from a single solid fuel to coal-based o...

AI Technical Summary

Problems solved by technology

In view of the outstanding problems and challenges such as the single development and utilization mode of oil-rich coal and the low resource utilization rate at present, there is an urgent need for an integrated co-mining method of underground in-situ gasification and pyrolysis of oil-rich coal

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