Screen Blade Turbine Impeller 에 의한 액체혼합 제 1보 = A Study of Liquid Mixing on Screen Blade Turbine Impeller ( 1 )

국문 초록 (Abstract)

screen blade turbine을 使用하였을 때가 flat blade turbine을 使用했을 때보다도 mixing effect가 優越하다. Screen hole에는 거의 無關하다 할 수 있다. (32mesh∼200mesh range에서 實驗해본 結果에 依해서)
Multi-stage solvent extraction 工程에서 screen blade turbine을 使用하면 mixing effect를 向上시킬 수 있다.

다국어 초록 (Multilingual Abstract)

The effect of the screen blade turbine impeller on mixing was investigated by the droplet size measurements. The droplet size was measured by using the photographic method.
A dilute solution of sebacyl chloride in carbon tetrachloride was dispersed in water by stirring in a baffled mixing tank. After stirring for a few minutes to achieve dispersion, a small quantity of agneous (70%) hexamethylene diamine was quickly added to the water phase.
Agitation was continued for a short time (less than a minute) and then terminated. Discrete droplets (Nylon 6-10) settled to the bottom. A photograph of a random sample of encapsulated drops was made.
Discrete droplets were not formed below 200 r.p.m(impeller rotational speed). The diameter of the droplet formed for the screen blade turbine was less than that for the flat blade turbine. In other words, the mixing effect of the screen blade turbine was superior to that of the flat blade turbine. The droplet size was ranged from 0.3㎜ to 3.6㎜. The minimum droplet diameter was 0.3㎜ when the impeller rotational speed was 800 r.p.m. In unbaffled tank, the diameter range of droplets was from 0. 56㎜ to 3.60㎜ for the 6-flat blade turbine and 0.45㎜ to 2.50㎜ to the 6-screen blade turbine. In 4-baffled tank, it was from 0.32㎜ to 3.25㎜ for the 6-flat blade turbine and 0.30㎜ to 2.45㎜ for the 6-screen blade turbine. The fine screen blade turbine was similar to the rough screen blade turbine in both the power requirements and the droplet size.