Cause Analysis and Countermeasures for Non-uniform Distribution of Gas-Solid Flows in a 330 MW CFB Boiler

To solve the problem of non-uniform distribution of gas-solid flows in a 330 MW circulating fluidized bed (CFB) boiler, an analysis was conducted on the formation mechanism and influencing factors, with focus on the relatively low primary air temperature and the large deviation of primary air temperature between both beds, after which corresponding countermeasures for 300 MW CFB boiler were put forward, such as reducing the load, increasing the primary air rate and controlling the primary air temperature deviation, etc. Results show that the problem of non-uniform gas-solid flows can be solved by taking above countermeasures.