充てん層を用いた溶融石炭スラグの高温除去に関する研究 (<小特集>動力・エネルギ-技術)

概要

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A new concept of the coal combustion system with very high molten slag removal efficiency is proposed, wherein a cyclone-type combustor and a pebble bed filter are combined. The major part of the molten slag is deposited on the wall of the cyclone-type combustor by centrifugal force, and the carried-over smaller-size molten slag particles are caught in the pebble bed filter by inertia. To demonstrate the feasibility of such a pebble bed filter, cold model experiments of minute particle filtration are carried out under conditions similar to those in commercial-scale coal combustion systems. From the experimental results, a new empirical equation is derived which is applicable for predicting the filtration effciency of the pebble bed filter. Based on this equation, a trade-off calculation is carried out between the slag removal efficiency and the pressure loss of the commercialscale pebble bed filter, which shows that very high slag removal efficiency can be expected with reasonable pressure loss.
一般社団法人日本機械学会の論文
1993-09-25