No.26 微粉炭燃焼ボイラにおける混炭時の灰付着特性の解明

概要

論文の詳細を見る
In pulverized coal combustion boiler, ash deposits such as slagging and fouling prevent heat transfer. On the other hand, a reserve of high lank coal is limited. So co-combustion of low lank coal, that is inexpensive, and high lank coal has been carried out in pulverized coal combustion boiler. Generally, low lank coal includes ash of low melting point. However, in this situation, ash deposition behavior has not been clarified. The purpose of this work is elucidation of ash deposition behavior during co-combustion in pulverized coal combustion boiler. Ash deposits were collected on a heat transfer tube with an ash deposit experiment at some blend condition. Ash particles near the adhesion interface were analyzed about element distribution by a Scanning Electron Microscope and an Energy Dispersive X-ray (SEM/EDX). And ash particles are also analyzed about composition and particle size distribution by a Computer Control Scanning Electron Microscope (CCSEM). We calculated the molten fraction of each mix condition ash by chemical equilibrium theory, using FactSage Ver.6.3.1 software.
一般社団法人日本エネルギー学会の論文
2013-10-21