Fluidized Carbonization of Caking Coal

概要

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The investigations were carried out to produce town gas from pul-verized caking coal by fluidized carbonization.The apparatus consists of a carbonization retort made of 18-8 stainless steel, enclosed in the combustion chamber, Inner diameter-and effective height of the retort were respectively 125mm, 2, 000mm. Coal examined was the fine coal of different caking property, which produced in the process of coal preparation.It has been of tentimes difficult to treat caking coal smoo-thly by fluidized carbonization, because of its caking property. And some methods were found to treat it, One of them was to decrease the average diameter of caking coal, and another was the blending of inert pulverized coke in it.The most interesting method was the usage of heat carriers for example, sand, iron sand and forsterite. These materials were previously fluidized in the carbonization retort and therein ca-king coal was supplied. In the retort, heat carriers and caking coal were mixed and agitated vigorously, consequently carbonization was carried out without caking trouble. Moreover, it was significant that thermal yield of gas per unit weight of coal inc-reases in this experiment.
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