aDepartment of Mechanical Engineering, Guru Nanak Dev Engineering College, Ludhiana, Punjab, India, E-mail: ravis021@yahoo.com
bDepartment of Mechanical Engineering, Thapar University, Patiala, Punjab, India, E-mail: skmohapatra@tiet.ac.in
cDepartment of Chemical Engineering, Thapar University, Patiala, Punjab, India, E-mail: gangacharyulu@gmail.com
The purpose of this paper is to develop a mathematical model for the exit gas composition for the combustion of biomass particularly rice husk particles. A three phase multistage mathematical model for combustion of rice husk in fluidized bed has been derived. The model is based on three phase theory of fluidization and material balance for shrinking rice husk particles and it is similar to model developed by Kunii and Levenspiel. The burning of rice husk is assumed to take place according to single film theory. The model has been used to predict the exit gas composition particularly O2, CO2 & N2. Effect of excess air, moisture content, volume ratio of cloud wake phase to bubble phase, bed height on exit gas composition has been discussed. Above model is experimentally correlated with the data collected from the commercially operated power plant at Jalkheri, Distt. Fatehgarh Sahib, Punjab, India which uses rice husk as a fuel input. All the results from the model for rice husk are coming with in permissible limits.
Three phase model, fluidization, rice husk, exit gas composition
