Method for comprehensively extinguishing underground gasification furnace

Abstract

The invention discloses a method for comprehensively extinguishing an underground gasification furnace, which comprises the following steps: firstly, extinguishing the furnace and put out fire by adopting steam; secondly, reducing the air temperature by using water spray mist; and finally, plugging all air inlet and outlet passages of the underground gasification furnace by adopting a slip casting method which uses a slip casting material so that the underground gasification furnace is isolated from the atmosphere. The method for comprehensively extinguishing the underground gasification furnace is quicker than a single furnace-extinguishing method and can thoroughly extinguish the furnace in about two months; besides, the water consumption is limited and the water is completely converted into steam and discharged, thus mine dankness threatening is not generated.

Description

technical field [0001] The invention relates to underground coal gasification technology. Background technique [0002] Underground coal gasification is a process in which coal in the ground is burned in a controlled manner, and combustible gas is generated through thermal and chemical effects on coal. Underground coal gasification technology is a safe, environmentally friendly and economical new method of coal mining , especially suitable for mines that are difficult to mine below a kilometer, and mines that are scrapped and cannot be mined. The underground gasification stations built in my country have been in operation for many years. The key technology of underground gasification is to build an underground gasification furnace, which consists of an intake channel, an exhaust channel, a gasification channel and a gasification coal bed. By artificially igniting from the intake channel and blowing air into the furnace, as the combustion continues, the fire zone moves to t...

AI Technical Summary

Problems solved by technology

At present, there are still some single methods of nitrogen-filled furnace extinguishment, steam-filled furnace extinguishment, water spray furnace extinguishment, etc., but these single methods take a long time to extinguish the furnace, which takes several months or more than half a year, waste of resources and high cost