改良型サイクロンによるフライアッシュ微粒子の高精度分級

概要

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Experimental studies were conducted on the separation of fine flyash particle by use of a revised type of cyclone with movable 50% cut size. The amount of unburned carbon in the separated particle was also measured. The 50% cut size of the cyclone was changed from 0.9 to 2.3 μm by use of the vertically movable apex cone of the cyclone. When the apex angle of the apex cone was smaller, the amount of particle deposition decreased and high-efficiency particle separation was obtained.<BR>In the case where the 50% cut size becomes less than 1 μm, the collection efficiency of the fine-particle side decreased and amount of unburned carbon increased in the fine-particle side.<BR>The reason why the unburned carbon increased in the fine-particle side is that coarse particles were smashed in the ring nozzle disperser and fine particles having a high unburned carbon content were introduced into the cyclone.<BR>When the 50% cut size becomes smaller, the unburned carbon amount in the coarseparticle side was nearly constant, but the value increased in the fine-particle side.The experimental data of the unburned carbon amount agreed well with the calculated results.
公益社団法人化学工学会の論文