Abstract:The pulverized coal combustion technology of CIM double- hearth kiln is a new type of pulverized coal combustion technology. The core of the technology is to control and distribute the quantity of pulverized coal supplied by the combination mode of a number of metering valves and a flow divider and a "Y" distributor. The metering valve is frequency conversion control, which can realize the regional adjustment of the quantity of pulverized coal,and the "Y" distributor is used to adjust the pulverized coal quantity of the single pipe. The effective switching between the two furnaces can be achieved by the shunt and valve control. The normal production of double- hearth kiln can be achieved by matching the time of pulverized coal with the period of double- hearth kiln.