Abstract: Abstract:The highspeed variable frequency soot blowing technology is widely used in domestic coalfired power plants, and favorable effects in eliminating the flue blockage by fly ash and improving heat transfer efficiency of heating surface were obtained. The working principle of the highspeed variable frequency soot blower was introduced. The install positions were analyzed, and some concrete suggestions were given. In order to improve the device effect, the development direction of the device in future was imagined.

Key words: Keywords:flue blockage by fly ash, soot blower, variable frequency soot blowing, heat transfer efficiency