What is the bed pressure of a circulating fluidized bed boiler?
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What is the static pressure in the air chamber of a circulating fluidized bed boiler, and what is its function? What is bed pressure, and is it the same as the pressure difference across the material layer?
This should be clearly specified in the boiler’s operating procedures. The static pressure in the air chamber is used primarily to determine whether everything is working properly inside the chamber. Fluctuations in air pressure that occur due to blockages in the chamber or abnormal conditions related to the return air (such as coking, detached air nozzles, or blocked nozzles) allow for timely adjustments to the operation, thereby preventing such issues from occurring. The function of bed pressure is similar
It’s abnormal; what kind of phenomena will occur?
During boiler operation, it is difficult to measure the bed pressure and the pressure difference across the material layer; generally, data from cold-state tests are used to calculate the pressure difference across the material layer based on the static pressure in the air chamber and the resistance of the air distribution plate. If coking occurs in the furnace, the static pressure in the air chamber will increase, but the air volume will decrease. High-value alarms can also occur at the furnace temperature measurement points.
The issue lies in the high carbon content of the fly ash in the fluidized bed boiler, which prevents it from reaching operating load. Engineer Liu 13002709449