Many of pulverized fuel boilers faces problem of sealing against ingress of air leakage of fly ash into the penthouse of boiler and air ingress into the boiler furnace, from different area, which has drastic effects on the operating parameter and efficiency of id fans.

This Mostly Happens due to – Expansion of Tubes carrying water and steam at high pressure.

The high pressure and thermal expansion causes movement of tubes resulting into the boiler concrete walls and fins to crack. These cracks are very hard to locate and releases ash into dead space resulting into heavy accumulation.