• Cethar Vessels Limited

Bubbling Fluidised Bed (BFB) Combustion Boiler

Cethar Vessels is at the forefront of meeting the requirements of a wide spectrum of industries with their products and services. Be it boilers for power generation or for steam generation in process industries, the company has the expertise and experience of over two decades, including boiler auxiliaries like fans, electrostatic precipitator, cooling towers, fuel handling systems, and water treatment systems. The "Cethar Fluidix" is an atmospheric Bubbling Fluidised Bed (BFB) Combustion Boiler with water cooled, fin welded membrane wall combustion chamber and under bed fuel feeding system. The boiler is designed for a variety of fuels such as Indian coal, imported coal, bio fuels such as rice husk and sawdust etc as main fuel for steam of high pressure and temperature. FD fan supplies the required combustion/fluidisation air for the boiler. Air is heated in the air heater and is distributed to the fluidised grid through a compartmentalised air box. A part of combustion air is tapped from air heater outlet and further pressurised by a PA fan for pneumatic under bed fuel feeding. The distributor plate is fitted with well proven and time tested air nozzles to distribute the fluidising air from air box uniformly over the entire bed. Bed tubes are immersed in the bed to maintain the required bed temperature. The fuel from the bunker is fed pneumatically into the bed through a set of pocket feeder and drag chain feeder and mixing nozzles located below the bunker. The hot flue gas generated from the combustion chamber passes through convection superheater, boiler bank tubes, economizer, airheater and ESP. Furnace draft is maintained by FD and ID fans. Steam drum, boiler bank, mud drum (if provided), in-bed evaporator tubes, down comers, riser, etc., forms part of evaporator system.