Accident Handling 19: What are the causes of blockage in the return feeder of a circulating fluidized bed boiler?
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What are the causes of blockage in the return feeder of a circulating fluidized bed boiler?
The reasons for the blockage of the return feeder in a circulating fluidized bed boiler are as follows: (1) Insufficient control of the fluidization air volume, resulting in excessive accumulation of circulating material and thus blockage. (2) High-temperature coking of the circulating ash at the return material device. (3) The shedding of refractory materials causes the return feeder to fail to fluidize and become clogged. (4) The fluidization air cap of the return feeder is blocked. (5) A failure of the fluidization fan resulted in the disappearance of the fluidization air. (6) The carbon content in the recycled material is too high. Secondary combustion takes place within the return material device. (7) The loose air duct on the standpipe of the leg is blocked or not opened.
The reasons for the blockage of the return feeder in a circulating fluidized bed boiler are as follows: (1) Insufficient control of the fluidization air volume, resulting in excessive accumulation of circulating material and thus blockage. (2) High-temperature coking of the circulating ash at the return material device. (3) The shedding of refractory materials causes the return feeder to fail to fluidize and become clogged. (4) The fluidization air cap of the return feeder is blocked. (5) A failure of the fluidization fan resulted in the disappearance of the fluidization air. (6) The carbon content in the recycled material is too high. Secondary combustion takes place within the return material device. (7) The loose air duct on the standpipe of the leg is blocked or not opened.