Our company and Tsinghua University have jointly developed fluidized bed boiler, which has high efficiency and low pollution. It can be designed to burn low-grade coal, coal, gas slag of fertilizer factory, especially for chemical factory to produce fluidized bed boilers. They all can produce heat 1500-2000KCal/kg. Using pipe heating surface, dust separation, adopting combined inertial separator, Using U-shaped separation at the first stage, using labyrinth separation at the second stage. 10t fluidized bed boiler was awarded outstanding new products in 1990.