The problems existing in operation of air-water combined slag cooler for circulating fluidized bed (CFB)boiler in one power plant are as follows:impeded slag discharging

end-port cracking of the air-transporting maniford for fan of the slag cooler

abnormal operation of the conical valve

comparatively severe control pannel card vibration of the electric actuator for regulating gate of each air chamber etc..For these

corresponding handling and retrofitting measures have been put forward.After implementation

the above-mentioned problems can be finally solved.