Influence of Indian lignite on gas solid hydrodynamics of a 210 MW CFB riser

2nd International conference on Advances in Mechanical Engineering

Naga Kishore, S.^1 ; Venkateswara Rao, T.^2 ; Deva Kumar, M.L.S.^1

Department of Mechanical Engineering, JNTUCE, Anantapur, India^1

Department of Mechanical Engineering, DBS Institute of Technology, Kavali, India^2

关键词: Circulating fluidized bed combustions;    Commercial operation;    Different heights;    Environmental performance;    Mathematical equations;    Mean particle diameter;    PC-fired boilers;    Suspension densities;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/402/1/012047/pdf
DOI  :  10.1088/1757-899X/402/1/012047

来源: IOP

【 摘 要 】

The circulating fluidized bed combustion (CFBC) technology is better alternative to be adopted for generating power than PC fired boiler technology due to several advantages in which mainly fuel flexibility, environmentally friendly and low cost compared to combination of PC fired boiler with FGD for similar environmental performance. Unlike PC fired boilers, CFB boilers are suitable for low grade fuels like lignite. The huge availability of lignite in India reduces the import cost of bituminous coal which is regularly supplied as a fuel for PC fired boilers from other countries. The objective of the present paper is that the study of gas solid behaviour in 210 MW CFB riser by using mathematical equations. In this study, the key parameters of hydrodynamics (suspension density, local voidage, pressure drop) which are affecting the design and performance of CFB boiler are studied at different height levels of riser. Three Indian lignite samples (Tamilnadu, Gujarat and Rajasthan) which are successfully used in commercial operations of CFB boiler in India are assumed for this study with two mean particle diameters. This work is also determined and compared the heat transfer coefficients of boiler elements (water wall, wing wall and furnace superheater) placed in the riser.