Propeller agitator is a specialized of various types of substances. It consists of three basic components which are the shaft, blade and the vessel. In the construction, mild steel was chosen due to it’s inherent properties. After the procurement, the following constructional operations were carried out which included marking out, center punching folding, welding, filling operation, assembling, and painting to beautify the equipment and for other purposes. The shapes and forms are formulated to obtain the following dimensions of the agitator. These are length of handle = 320mm, diameter of gear teeth = 100mm, thickness of shaft = 20mm, thickness of gear = 12mm, size of blade = 50mm x 100mm, blade diameter = 63mm, inside diameter of pump = 12mm, outside diameter of pump = 20mm, shat height = 470mm, vessel diameter = 340mm and height = 560mm
The agitating mixer has high efficiency of comparable to those produced industrially. The estimated rate of rotation is 1720 rpm.
The cost of construction of the agitator is however minimized due to the preferred choice of the raw material and method of fabrication.
1.1 BACKGROUND OF THE STUDY
Propeller agitator mixing is one of the most common operations carried out in chemical, processing and allied industries. The terms “mixing” is applied to the processes used to reduce the degree of non uniformity or gradual of a property in a system such as concentration, viscosity, temperature and so on.
Mixing is achieved by moving material from one region to another. It may be of interests simply as a means of achieving a desired degree of homogeneity or it may be used two proote heat undergoing a chemical reaction.
At the outset I t is useful to consider some common examples of problems encountered in industrial mixing operations, since this will nto only reveal the ubiquitous nature of the process but will also provide an appreciation of some of the associated. Difficulties. Several attempts have been made to classify mixing problems, and for example “REAVELL” used as a criterion for mixing of powders, the flowability of the final products, HARNEY et al based their classification on the phases present, that is liquid – liquid, solid – liquid and so on. This is probably the most useful description of mixing as it allows the adoption of a unified approach to the problems encountered in a range of industries.
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