Avoid Clinker Formation by poking,soot blowing,flushing,clinker grinder,using primary secondary air ratio and avoid overfiring

Clinker Formation in Boiler of Thermal Power Station is due to high Ash Content and Minerals present in it.Due to poor Quality of Coal ash got fused and mineral content stick into Water Wall which is very difficult to remove often requires removal by pneumatic machines.This Clinker formation may be stopped to some extent if sufficient water is sprayed into hopper and regular poking and using good quality of coal.



Accumulation of clinker may be checked if poking of hoppers done regularly and any negligence may start process of clinker deposition.If clinker is not removed immediately then same may choke hopper and often workers got burnt due to sudden fall of hot water which accumulated in hopper.


Once clinker formed into hopper than outage of unit is evident otherwise clinker may deposit in huge quantity which will be very difficult to remove because minerals content present in coal fused in ash deposit into water wall is very hard.Such hard Lumps of Clinkers requires pneumatic hammering which takes very much time.



Although cause of clinker formation is poor coal quality and high mineral content in coal but accumulation in Water Wall is result of negligence by Workers and Engineers who do not poke hopper regularly and spray insufficient amount of water into hopper which may not flush fused slag to channels.Outage of clinker grinder is also matter of concern.



Hence it is advised never blame to low coal quality,low GCV and high mineral content in coal.Instead of blaming to above factors try regular poking and provide sufficient water in hopper.Clinker Grinders must be made operational.In India coal supplied to power plants is often of low quality which has high ash content so precaution is best solution here.