Abstract
Abstract One of the problems associated with the commercialization of Atmospheric Fluidized Bed Combustors (AFBC) is that of feeding coal-limestone mixtures into the bed without breakdown of the particles. Breakdown of the particles should be avoided in order to prevent the emission of inordinately large quantities of ash fines and the resulting heavy duty to the flue-gas cyclones. A system has been constructed which has successfully split individual streams of crushed walnut shells. limestone or coal from a 100 mm (4 inch) feedline to four 50 mm (2 inch) lines with minimal (10%) attrition and acceptable uniformity. The system consists of a horizontal section 10 meters long, followed by a vertical section 5 meters high at the top of which is affixed a four-way splitter cap. Samples are knocked out by cyclones in each of the four arms and analysed both for total weight and size distribution. Based on these and previous analyses some parameters have been set for the length of pneumatic conveying lines for f...
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