Waste Heat Recovery Boiler

Waste Heat Recovery Boiler is a vertical single drum boiler consisting of economiser, evaporator, superheater, hot gas inlet duct, outlet gas duct etc. The HRSG unit is suitable for outdoor installation and designed to generate steam from hot kiln gas.Steam drum is liberally sized, and provided with Turbo separators, screen separators for effective separation of water from steam water mixture.Radiant chamber is provided to cool the dust laden gas below ash fusion temperature before it enters the screen and super heater section. It is designed in such a way that the gas passes at optimum velocity and travels vertically downwards and takes a 180 degree turn at the bottom. This will greatly aid in removal of dust particles in the gas.Evaporator section has horizontal/ inclined, inline tube arrangement with top and bottom headers for easy flow of steam water mixture. The evaporator tubes are supported from water wall through specially designed clamp supports. Adequate soot blowers are provided to remove soot deposition.Superheater is of two stage design. Secondary super heater is preceded by a row of screen tubes to cool the flue gases. The super heater tubes are supported from water wall through specially designed clamp supports. Economiser system is of inline, counter flow type.Refractory lining is provided inside the hot duct to reduce the skin temperature of duct plate and to reduce the heat loss. Exhaust gas from ABC (After Burning Chamber) of kiln enters the radiant chamber where it gets cooled sufficiently before entering into screen tube section.Top supported construction of radiant chamber allows free expansion. The superheater and evaporator sections are supported from water wall .The economiser section are supported from the bottom by adequately sized structures.