煤化工水处理污泥对准东次烟煤热解和燃烧及气化性能的影响OA北大核心CSTPCD

It is of practical significance to analyze the composition,micromorphology and functional group types of the coal chemical water treatment sludge(YS)and explore its influence on the thermal reaction performance of Zhundong sub-bituminous coal(ZSBC)in different exper-imental atmospheres.This will enable the reasonable disposal and resource utilization of this kind of sludge.Used ZSBC,YS and Y1Z9(sample obtained by mixing YS and ZSBC in a mass ratio of 1∶9)as research object,by changed the gas atmosphere of the heat experiment,the effect of YS on the thermal reaction performance of ZSBC in diferent reaction atmospheres was studied.The results show that ZSBC is richer in fixed carbon and volatile matter compared to YS,while YS presents a higher ash content and is mainly composed of compounds containing P,Ca and Fe ele-ments.The functional groups types of YS are more abundant than those of ZSBC,with the YS sample mainly comprising fatty compounds,while ZSBC containing a significant amount of aro-matic compounds.In an inert atmosphere,doping YS can reduce the activation energy of ZSBC in the rapid pyrolysis stage(405℃-485℃),increase the pre-exponential factor,and accelerate the reaction process of Y1Z9 at 405℃-485℃.In an oxidizing atmosphere,doping YS can reduce the ignition point of ZSBC from 475℃ to 443℃,and enhance the comprehensive combustion charac-teristic index(S),combustion stability index(D)and combustion characteristic factor(AC).Doping YS can reduce the activation energy of ZSBC in the temperature range of 380℃-550℃ and increase the pre exponential factor,the combustion reaction of Y1Z9 in the 380℃-550℃ stage is promoted.In a carbon dioxide atmosphere,the average initial reactivity index(Ri),re-activity index(Rf)and average termination reaction index(Rs)of Y1Z9 are all lower than those of ZSBC,indicating that doping YS could delay the gasification reaction process of ZSBC.