Programmable Device Circuits and Systems

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PLC Based Automatic Soot Blower Control System in Boiler


Affiliations
1 Department of Electronics and Instrumentation Engineering, Hindusthan College of Engineering and Technology, Coimbatore, India
2 Department of Electronics and Instrumentation Engineering, Hindusthan College of Engineering and Technology, Coimbatore, India
     

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Boiler is a powerhouse of any process industry. Formation of scale and soot in boilers is still a great concern to increase the efficiency of the boiler. This paper presents a method for the soot blowing automation in a boiler using PLC.  The important parameter to be monitored in each steam generator is the thermal efficiency or the heat rate. These parameters are influenced by many factors, including the boiler design, control strategy, fuel quality, operating conditions etc. Soot, ash, and slag deposit (fouling) on the individual heat exchange surfaces affects the heat transfer between the flue gas and steam. It is necessary to clean the surfaces of boiler tubes periodically, in order to avoid the negative effect of fouling. The main objective of the soot blowing automation system is to optimize this cycle. An automated technique is designed and implemented using PLC. Proposed soot blowing automation system monitors the process variables, estimates the fouling status of heat exchange surfaces, evaluates impact on economy and triggers the soot blowing sequence.

Keywords

Boiler, Thermal Efficiency, Soot Blower, PLC.
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  • PLC Based Automatic Soot Blower Control System in Boiler

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Authors

N. Kavitha
Department of Electronics and Instrumentation Engineering, Hindusthan College of Engineering and Technology, Coimbatore, India
K. Sentamilarasu
Department of Electronics and Instrumentation Engineering, Hindusthan College of Engineering and Technology, Coimbatore, India
K. Divyabharathi
Department of Electronics and Instrumentation Engineering, Hindusthan College of Engineering and Technology, Coimbatore, India
A. Balasubramanian
Department of Electronics and Instrumentation Engineering, Hindusthan College of Engineering and Technology, Coimbatore, India
C. Vigneshwaran
Department of Electronics and Instrumentation Engineering, Hindusthan College of Engineering and Technology, Coimbatore, India

Abstract


Boiler is a powerhouse of any process industry. Formation of scale and soot in boilers is still a great concern to increase the efficiency of the boiler. This paper presents a method for the soot blowing automation in a boiler using PLC.  The important parameter to be monitored in each steam generator is the thermal efficiency or the heat rate. These parameters are influenced by many factors, including the boiler design, control strategy, fuel quality, operating conditions etc. Soot, ash, and slag deposit (fouling) on the individual heat exchange surfaces affects the heat transfer between the flue gas and steam. It is necessary to clean the surfaces of boiler tubes periodically, in order to avoid the negative effect of fouling. The main objective of the soot blowing automation system is to optimize this cycle. An automated technique is designed and implemented using PLC. Proposed soot blowing automation system monitors the process variables, estimates the fouling status of heat exchange surfaces, evaluates impact on economy and triggers the soot blowing sequence.

Keywords


Boiler, Thermal Efficiency, Soot Blower, PLC.

References