It is the II-type arrangement of free-circulation single-cylinder water-tube boiler. Hearth is the membrane water-screen suspension enclosed structure.  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 (≥99%).  Superheater, coal economizer and air pre-heater are in the standing well at the tail.
The oiler is designed with proven technology that it has good corrosion resistance, wide range of applicable coals, high desulfurization efficiency and other characteristics and ensures the stable operation under 30% load to full load.
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