WT5”BZ]Gas particle flows under different swirler blade angles,different covering degrees of a device of concentrating coal powder and different secondary air flow rates at the exit of the swirl burner with dense and dilute pulverized coal are measured using a 3 D phase Doppler particle anemometer (PDPA).

Expounds the problems associated with installation and operation of radial thick-thin vortex burners and possible solutions.

The application, abrasion especially material of concentrator vane for direct-flow bias burner of 670t/h boiler are analyzed, the forms of failure are determined to improve abrasion property of concentrator.

Types and status quo of bias burners in China are analyzed and the characteristics and application range of several foreign clean,steady and high concentration pulverized coal combustion techniques are discussed in the article,which can provide useful instruction and reference for the development and exploitation of Chinese bias burners.