Double-stage coal gasifier is specially designed for gasifying bituminous coal, by which light tar can be carbonized out from coal in pyrolysis section. The gas calorific value produced with this gasifier is higher than that of produced with KM1Q series and it has better environmental protection performance. Coal feeding section: Practical and reliable coal-level detector cooperates with stoker to realize automatic coal feeding and guarantee coal gasifier is in full charge layer operation.

Pyrolysis section: Furnace lining's inside. This structure was designed after the strict calculation of heat transfer and heat exchanger, which can improve heat transfer efficiency, so that the coal can be dried and carbonized fully and effectively in this section, as well as the bolatile matter can be pyrolysised and it will mix in the gas to improve the gas calorific value. Also, it is helpful for the gasification of lower gas.