Inhibition property of gasification ash to coal spontaneous combustion

Abstract

In view of the problems of uncomprehensive utilization of solid waste resources and environmental pollution caused by the stacking of coal gasification cinder, the gel inhibition performance of coal gasification cinder was studied. A new kind of anti-fire gel material was prepared by crosslinking with gasification cinder as the base material, HPMC as the gelling agent, and Na2CO3 as the coagulant. The effect of coal to oil gasification ash gel on coal spontaneous combustion and activation energy was analyzed in essence and phenomenon through temperature-programmed experiments and determination of marker gases. Results showed that the concentration of CO gas and C2H4 gas of anthracite during the process of temperature oxidation decreased by 38.1% and 65.8%. The inhibition rate after gel treatment was 56.4%, and the activation energy was 6.5%. It shows that the adjunction of ash gel can validly mitigate the reaction rate of the coal spontaneous combustion process and inhibit the reaction procedure between coal and oxygen. The inhibition performance is better than the common CaCl2.