Pulverized coal pyrolysis and utilization system

The utility model provides a pulverized coal pyrolysis and utilization system, and relates to the field of pulverized coal pyrolysis, a pyrolysis heat source adopts partial pyrolysis coal gas and fine coke powder in the coal gas, circulating flue gas is utilized to send the fine pulverized coal with temperature to a process heating furnace to be mixed with the coal gas for combustion to provide the heat source, and the fine coke powder in the coal gas is collected and used as the heat source; therefore, fine coke powder in the coal gas is treated, and a heat source required by pyrolysis is also solved; the energy utilization rate can be improved through matched combustion of part of coal gas; two process heating furnaces are arranged to correspond to first-stage pyrolysis and second-stage pyrolysis respectively, hot flue gas generated by the first process heating furnace is subjected to second-stage pyrolysis and then enters a drying section to dry raw coal, hot flue gas generated by the second process heatin