How to reduce uneven wear on the boiler water wall tubes
Thread Content
During the operation of circulating fluidized bed boilers, uneven wear occurs on the heated surfaces of the water wall tubes, especially in the dense-phase regions of the water wall on the feed side and the return material side; this issue can be particularly severe at times. What are some effective ways to avoid this problem?
This situation requires a detailed examination to determine what is causing it Is it a problem with the particle size of the coal fed into the furnace? The issue of uneven primary air flow? Is it a wear issue with the wind cap? Is it the lower pre-combustion zone in the dense phase region? Is it a design issue with the boiler (does the same problem occur with other boilers of the same type)? Is it a problem with the ash characteristics of the fuel? Is it still a problem with the operator’s adjustments? Wait, we need to identify the cause before we can develop specific protective measures.
Thank you, the three boilers of the same model are in the same condition
This situation can be reported to the manufacturers and designers of the boiler
Shouldn’t the dense phase zone of a CFB boiler be lined with castable? Wear in the CFB furnace is a common problem; inadequate arrangement of secondary air during design can exacerbate wear on the water walls on the front and rear sides.