Incident Handling 37: How should damage to the water wall of a circulating fluidized bed boiler be dealt with?
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How should damage to the water wall of a circulating fluidized bed boiler be dealt with?
(1) Closely monitor changes in bed temperature and bed pressure, and strengthen the inspection and monitoring of the leakage area. (2) Try to maintain the drum water level, and appropriately reduce the steam pressure and load. (3) If the bed temperature drops rapidly or the water level cannot be maintained, the furnace should be shut down immediately. (4) After the boiler is shut down, increasing the water inflow does not result in an increase in water level; in such cases, water inflow should be stopped, and it is strictly prohibited to open the economizer recirculation valve. (5) After shutdown. One exhaust fan should be kept running, and it should be stopped once all the steam in the furnace has been removed.
Determine whether it is an internal leak or an external leak; if it is an external leak, sealing can be carried out under pressure, provided that the technical capabilities are sufficient.