Analysis on differentials of coking characteristics of 200 MW boilers

The problem of larger amount of coking in boilers No.1 and No.2 of Xinjiang Huadian Hongyanchi Power Plant was analyzed.The design features,the burner forms and the arrangement mode of the secondary air nozzles of the boilers No.1 and No.2 were compared with those of the boilers No.3 and No.4,and the differentials between the boilers No.1 and No.2 and boilers No.3 and No.4 were found out.The differentials were analyzed,the main reasons of lager amount of coking in boilers No.1 and No.2 were found out,and the reformation suggestions were put forward.