DESIGN AND APPLICATION OF AUTOMATIC CONTROL SYSTEM IN A LABORATORY SCALE FLUIDIZED BED COAL COMBUSTION SYSTEM

Abstract

The air and coal ratio must be calculated according to bed material, bed temperature and emissions to obtain an efficient combustion at energy production foundations. The amount of air which enters the combustion chamber can change according to the properties of fuel, moisture in air, outside temperature and air pressure, so it may change every season, day and hour. During the combustion, high amount of air causes to decreases in combustion temperature and increases in the NOx emissions, on the other hand, low amount of air causes to incomplete combustion products like CO. Automatic control systems are indispensable helpers which are able to reduce emissions, prevent pollutants and increase efficiency. In this study, the planned application is collecting flue gas data by sensors which are installed to the circulating fluidized bed. With the help of these signals the coal combustion system which has a laboratory size, produces feedback signals according to an algorithm which has determined before. Thus, the motor of the coal feeder and air flow fan which control the system can be actuated. So the plan is, to provide a properly and automatically working of circulating fluidized bed (CFB) coal combustion system.

Keywords

• Energy,Coal,Emissions,Fluidized bed

References

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3. P. Basu, “Combustion and Gasification in Fluidized Beds”, Taylor and Francis, (2006)