It is the Ⅱ-arrangement free-circulation,single-cylinder,water-tube. Hearth is the membrane water-screen suspension enclosure. Water-cooled air chamber and water-cooled air distribution panel are used.Method of ignition:bed underneath.High-temperature insulation spiral-type cyclone cylinder is at the outlet of hearth,fitted with the support mechanism.Separation efficiency is extremely high(Circulating Fluidized Boiler Introduction (≥99%).Superheater,coal economizer and air pre-heater are in the standing well at the rail. Boiler is designed with proven technology that boasts god corrsion resistance,wide range of applicable coals,high desulfurization efficiency and other characteristics and end ensures the stable operation under 30% load to full load.