Experimental study on carbonization of low-rank pulverized coal with high temperature heat pipe

摘要

Aimed at improving the utilization of pulverized coal, high-temperature heat pipe technology was introduced into lignite carbonization.Under the design of power of lOkw semi-industrial pulverized coal carbonization test equipment, Fugu lignite coal as raw material to investigate the operating characteristics of the device and carbonization characteristics. Experimental result shows that the high temperature heat pipes heat steadily and meet the temperature requirement of low-temperature carbonization. With the extension of the holding time, the semi-coke fixed carbon content increasing, but volatile matter vice versa, however, holding time above 60 minutes, the effect of carbonization is not obvious, and the best carbonization time is 30 ~ 60 minutes. The length of the holding time has little effect on gas composition, the content of H_2 and CH_4 are relatively higher than the rest gas, (H_2 + CH4) gas accounted for 70% of the total, the heating value remains at 18.76 ~ 19.22MJ/m~3, belongs to medium-high value gas, could provide for industrial and civilian use.