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Vol. 124, Issue 1, January 2011, pp.83-100

 

Bullet

Design of a DCS Based Model for Continuous Leakage Monitoring System of Rotary Air Preheater
of a Thermal Power Plant

 

Madan BHOWMICK and Satish Chandra BERA

Department of Instrumentation & Measurement, Applied Physics

Calcutta University, 92, APC Road, Kolkata 700009, India

Tel.: +91-9477373269

E-mail: msbhowmick776@rediffmail.com, scb152@indiatimes.com

 

 

Received: 17 November 2010   /Accepted: 24 January 2011   /Published: 28 January 2011

 

Abstract: The leakage in rotary air preheater makes a considerable contribution to the reduced overall efficiency of fossil-fuel-fired thermal power plants and increase the effect on environment. Since it is normal phenomenon, continuous monitoring of leakage is generally omitted in most power plants. But for accurate analysis of the operation of the thermal power plant, this leakage monitoring plays a vital role. In the present paper, design of a DCS based model for continuous leakages monitoring of rotary air preheater has been described. In the proposed model, the existing DCS based instrumentation system has been modified and online leakage monitoring system has been developed. This model has been installed in a captive power plant with high capacity boilers and very much satisfactory operation of this system has been observed. The observed online data along with their analysis results are presented in this paper.

 

Keywords: Rotary air preheater, Regenerators, Continuous leakage monitoring, Combustion

 

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