3 Pass Smoke Cum Water tube Membrane Type Boilers Description:- Combitherm Boiler is a unique design membrane water wall type boiler combining the advantages of water tube & smoke tube designs . The radiation zone of the furnace is covered on three sides by water tubes forming the first pass and the conventional smoke tube shell has tubes lined up forming the second and third pass of flue gases. Thus, the water wall furnace recovers the radiation heat of the furnace and the smoke tube shell provides large water & steam holding capacities to give the maximum advantage. Working: The filling of the boiler is done through a feed pipe connection. This water flows through the water wall membrane . It circulates the water from the water wall membrane to pressurized part of the boiler .As firing is done it raises the temperature of water of wate...