Abstract:

Taking a 600MW supercritical W flame boiler coalfired unit as the research object,in view of its specific structure characteristics and operation mode,an RB control strategy for primary air fan is designed.It introduces the operating process of primary air fan in RB test,and makes a detailed analysis on the changes of  main parameters which includes furnace pressure,main steam temperature and reheat steam temperature during the test.The control strategy is optimized according to the problems founded in the first primary air fan RB test,then another primary air fan RB test was carried out.The test results show that the optimized control strategy has good application effect and the unit operation stably,the fluctuation range of the main parameters is obviously improved compared with that of the first RB test.The results can provide a beneficial reference for the application of primary air fan RB test with same type.

Key words:

supercritical oncethrough boiler, W Flame, RB control of primary air fan