Optimization of sludge flow behavior in a mixing tank through blade design

Bong, Kuek Kong (2017) Optimization of sludge flow behavior in a mixing tank through blade design. [Final Year Project Report] (Unpublished)

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Abstract

Latic acids are very useful in industry for the food preservative and yet are expensive due to the high processing cost. One of the manners to get the latic acids is through the conversion from the starch. The starch need to under the liquefaction and saccrification in order to produce latic acid. Before the dual volume of reactor been introduced, the industries do the both processes in a separated tank . After the dual volume tank which is inner and out volume been introduced, both processes can be done simultaneously. By doing this, the heat from the inner tank can actually heat up the starch at the outer tank. However the problem occurs due to the high viscous of the starch, the current blade produces a very poor flow pattern. It will affect the mixing performance of the starch as well as affect the quality of the starch. Hence, the objective of this project is to study and modify the blade to improve the agitation in the reactor. The existing reactor is draw in the Engineering CAD software according to the original dimension provided by the owner. The existing blade and modified blade are designed and simulated by using CFD simulation. The result of the modified blade gives better flow distribution compare to existing blade.

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