IJSART - Volume 3 Issue 3 –MARCH 2017 ISSN [ONLINE]: 2395-1052 Page | 321 www.ijsart.com Geometry and Architecture of Mixing Agitator – A Review Mr. Samadhan A. Ambhore 1 , Prof. D.A. Deshmukh 2 , Prof. Ravindra S. Surase 3 1, 2, 3 Department of Mechanical Engineering 1, 2, 3 SYCET, Aurangabad Abstract- Agitator is one of the important parts in the mixing process. Proper and uniform mixing gives improved quality of the product. In this paper, we have mainly focused on different types of agitator used in industries to increase the mixing performance in industry. Also includes the different parameters used for design of agitator. Mixing is one of the most fundamental operations in industries like paper, food, cosmetic, chemical, biochemical and pharmaceutical applications. The review drives us to design an error prone model for agitator which will increase the mixing percentage, ultimately increase the gain of industry to get place into market with price for product. The design of agitator affects on the mixing process as proper design can increase the mixing and uniform distributions of all additives, chemicals, raw material present in pulp. Keywords-Mixing Process, Agitator, Paper Industry, Design of Agitator I. INTRODUCTION Mechanical agitators can be divided into seven basic groups, namely 1. Paddles 2. Turbines, 3. Propellers, 4. Helical screws, 5. Cones, 6. Radial flow propellers and 7. High speed disc. Mixing by agitator take place due to momentum transfer. High velocity streams, produced by the impeller, entrain the slower mixing or stagnant liquid areas from all parts of the vessel and a uniform mixing occurs. As viscosity increase, frictional drag forces retard the high velocity stream and confine them to immediate vicinity of the impeller. Thus stagnant areas develop and uniform mixing is not achieved. Agitators having a small blade area which rotate at high speed, for instance, propellers, flat or curved blade turbine are used to mix liquids having low viscosities [3]. Various kinds of large impellers, such as FULLZONE (Kobelco Eco-Solutions Co., Ltd.), Super-Mix MR205 (Satake Chemical Equipment Mfg. Co., Ltd.), Hi-F mixer (Soken Technic Co., Ltd.) and MAXBLEND (Sumitomo Heavy Industries Co., Ltd.), have been developed in Japan. Since these Impellers have a high mixing performance over a wide range of viscosities, they are used in mixing, dispersion, reaction and polymerization processes. Recently, their use in the food and pharmaceutical industries is being considered. For agitation in the turbulent region, these large impellers are usually used with baffles to promote mixing. However, baffles often cause problems for washing and sterilization. Furthermore, in the laminar region, baffles are not effective for mixing, and in fact, they often obstruct mixing. Eccentric mixing is one of the traditional methods of promoting mixing in a vessel without baffles. An eccentrically located impeller generates a vertical flow, which contributes to mixing, without baffles. If a large impeller is used at an eccentric position, it is expected that the high performance of the large impeller can be combined with the advantages of eccentric mixer Separation damage and fracture rock movement reflect [2]. Agitation refers to force a fluid by agitating and to flow in a circulatory motion. Agitator has various purposes such as suspending solid particles, blending miscible liquids, dispersing a gas through a liquid in the form of small bubbles, and promoting heat transfer between the liquid and coil or jacket. There are some factor affecting the efficiency of agitating, some are related to the liquid characteristics such as viscosity and densities as well as some are related to geometry such as the container diameter (D), impeller length (Y), rotating speed (N), an height of impeller from bottom of the container (H), other Characteristics of mixing include the liquid the necessity of performing the process to make the liquid experience all kind of movement inside container. There is no universal system till now that is valid for all liquids and all tanks. Mixing is a very important unit operation in many industries like cosmetic, chemical, biochemical and pharmaceutical applications dairy and food process industry. For instance, all operations involving blending homogenization, emulsion preparation, extraction, dissolution, crystallization, liquid phase reactions, etc., need mixing in one form or the other [3]. II. LITERATURE REVIEW D.Chitra and L.Muruganandam (2013) Solid – liquid mixing is important in chemical engineering operations such as adsorption, crystallization, dissolution, leaching, ion exchange, precipitation and catalytic reactions. Several studies on solid-liquid mixing system have been done for characterizing just suspended condition. Other parameters