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RESEARCH PAPERS

Experimental Studies on Combustion of Cattle Manure in a Fluidized Bed Combustor

[+] Author and Article Information
K. Annamalai, M. Y. Ibrahim

Mechanical Engineering Department, Texas A and M University, College Station, Tex. 77843

J. M. Sweeten

Agricultural Engineering Department, Texas A and M University, College Station, Tex. 77843

J. Energy Resour. Technol 109(2), 49-57 (Jun 01, 1987) (9 pages) doi:10.1115/1.3231324 History: Received April 06, 1986; Revised April 27, 1987; Online October 22, 2009

Abstract

Manure from cattle feedlots is a renewable energy source which has the potential of supplementing the existing fossil fuels. But the heat content of manure is rather low. Since, the fluidized bed combustion technology has been used for the energy conversion of marginal fuels, such a technology is being explored for the combustion of feedlot manure. A fluidized bed combustor of 0.15 m (6 in.) diameter was used for the combustion tests on manure. Experiments were conducted with −20 to +20 percent excess air and at bed temperatures ranging from 600°C (1112°F) to 800°C (1472°F). Experimental data revealed that the gasification efficiencies ranged from 90 to 98 percent, while the combustion efficiencies varied from 45 to 85 percent. Higher combustion efficiencies were obtained with decreased volatile solids content of manure. The low combustion efficiencies are attributed to the limited residence time available for the volatiles to burn within the reactor.

Copyright © 1987 by ASME
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