The air-water combined slag cooler or called basket slag cooler is commonly adopted for CFB boilers to cool the bottom slags.The main faults occurred on 37 t/h air-water combined slag cooler and their causes have been analysed

and measures

such as reasonably controlling the bed pressure in operation

optimizing the sequence of starting the slag cooler up and putting it into operation

as well as controlling the particle size of fuel coal

and controlling the air flow rate and slag-entering amount in operation etc.

being put forward.After implementation

the faults occurred in slag cooler

including clogging in slag-intaking pipe

and unsmooth slag-discharging from the slag cooler have been basically resolved

ensuring continuous and stable operation of the slag cooler.