For pulverized coal pipeline with scale of φ813 mm×12 mm

a 1:1 hot state test rig was built up. Experimentally study on ignition performance of a new bias concentrated plasma burner was carried out by using high moisture and low calorific value lignite fired on ultra supercritical 660 MW unit in Shenhua Shengli Power Plant. The test results show that

when the burner is under the condition that is basically consistent with the actual working conditions of the project site

plasma ignition for lignite with total moisture content of 36.1% is realized. At the same time

the influence law of key parameters such as primary air speed

pulverized coal mass fraction

primary air oxygen content and plasma generator power on ignition performance are studied by using single factor variable test method. It is obtained that the order of influence of key parameters on the sensitivity of burner ignition performance is primary air temperature

primary air oxygen content

primary air speed

pulverized coal mass fraction and generator power. On the premise of ensuring that other factors meet the conditions during the start-up of the cold furnace of the unit

the primary air temperature should be increased as much as possible to improve the ignition performance of the plasma burner.