What is the typical level of combustible content in the fly ash of circulating fluidized bed boilers?
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1. What is the typical acceptable level of combustible content in the fly ash of circulating fluidized bed boilers? 2. What are the reasons for the high content of combustibles in fly ash?
The combustible content is related to the volatiles
The lower, the better; our factory’s 220-ton boilers usually operate at around 10 points. This is related to various factors such as the particle size of coal and the secondary air.
It is generally no higher than 8%, depending on the coal quality and operating conditions!
That is, the carbon content in fly ash is generally 5% to 10%, and it depends on the type of coal, the characteristics of the furnace, as well as the level of operational expertise
1. What is the typical acceptable level of combustible content in the fly ash of circulating fluidized bed boilers? 2. What are the reasons for the high content of combustibles in fly ash? . . . . . If this type of circulating fluidized bed combustion is modified to carbon molecular gasification combustion, this problem can be completely resolved. Moreover, it is also possible to prevent pollution at its source; while meeting environmental standards, the electrical energy consumption associated with the operation of the boiler can be reduced by more than 50%.
In biomass circulating fluidized beds, the value is generally less than 5%. Measures to control the carbon content in fly ash: 1. Increase the bed temperature to improve the combustion efficiency of the fuel fed into the furnace. 2. The ratio of primary to secondary air is 4:6, with an appropriate negative pressure in the furnace. 3. The optimal wind-material ratio. 4. Appropriate fuel particle size. 5. The return feeder is functioning properly.