The circulating fluidized bed bed material will not settle
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The bed material in the circulating fluidized bed will not settle; the slag cooler is operating under high load, yet the bed material still won’t settle. The pressure in the air chamber is high, and the slag discharge pipe is unobstructed. What should be done? What’s the reason? Are there any good solutions?
The material layer cannot be placed down; one reason is too much slag (poor quality coal, high ash content, low calorific value). Secondly, the primary air pressure is high; it’s not clear whether this meets the steam supply requirements of the boiler. Also, you didn’t mention how thick the material layer is – it would be best to provide a photo from the DCS system
In addition to improving slag discharge, I recommend using a slag discharge system in the air chamber. If such a system is available, excessive dust accumulation in the air chamber will increase the air intake resistance, which in turn raises the pressure within the air chamber.