加圧石炭部分燃焼炉の要素研究 : 石炭供給配分変化特性

概要

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A pressurized coal partial combustor (P-CPC) with two-stage coal supply was tested to elucidate the characteristics of a 7T-coal/d air-blown coal gasifier. As the secondary coal-feed ratio (2ry coal/total coal) was increased, the following phenomena were observed, indicating depression of the coal gasification reaction ; (1) decrease of CO and H_2 concentrations, (2) decrease of calorific value of product gas, (3) increase of hydrocarbon (CH_4 + C_2H_6) content, (4) decrease of carbon conversion efficiency. Secondary coal supply is effective for stable slag discharge and the prevention of the slagging problem in a reductor due to the rapid temperature drop of molten slag. In conclusion, as long as stable slag discharge is obtained, it is effective to lower the 2ry coal-feed ratio to promote the coal gasification reaction, resulting in, for example, higher calorific value of the product gas.
一般社団法人日本機械学会の論文
1995-07-25