Overview and status of first 25 MW{sub}e IR-CFB boiler in India

摘要

The Babcock & Wilcox (B&W) internal recirculation CFB (IR-CFB) boiler is unique in design. Worldwide, B&W offers IR-CFB boilers up to l50MW{sub}e, both reheat and non-reheat, and is pursuing units up to 300 MW{sub}eThis paper discusses an overview and status of the construction, commissioning, initial start-up operation and milestones of the ongoing 25 MW{sub}e IR-CFB boiler project at Kanoria Chemicals and Industries Ltd., Renukoot, India. This IR-CFB boiler isdesigned, supplied and installed by Thermax Babcock & Wilcox Ltd. (TBW), a joint venture company of B&W and Thermax in India. The boiler parameters are, steam flow of 29.2 kg/s (231,420 lbs/hr), 6.4 MPa (925 psig), and 485C (905F) with feedwatertemperature of 180C (356F). The boiler will utilize high-ash content(>45%), subbituminous coal with a heating value of 3500 KCal/kg (6300 Btu/lb). This paper also discusses the various aspects of the boiler design, performance, auxiliary equipment, advantages and initial start-up operating performance.