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Paddy cleaner is aimed to remove damaged wheat

2018-06-21
By: ricepolisher
Posted in: paddy cleaner
Paddy cleaner is aimed to remove damaged wheat

The first cleaning is through paddy cleaner, which is aimed to remove damaged wheat, seeds and other extraneous matter by process of separation to maximum extend. First cleaning also aims of removing any dust from the wheat by means of scouring and aspiration. In addition to wheat being cleaned, it also must be prepared so that it is in for milling by conditioning treatment. The first cleaning equipment is magnet to remove iron impurities followed by size separation by separator. The size separator will sieve out the material larger and smaller than wheat. The size separator is followed by aspirator to separate lighter materials than wheat. The next cleaning stage separates heavier impurities from wheat by specific gravity. The indented cylinder contains pocket, into which wheat is centrally fed from one end. Material longer than the pocket designs discharges at the opposite end, whereas the smaller material sits in pockets until it falls from top of it, cycle by gravity into an adjustable angle trough conveyor.

Portable Paddy Cleaning Machine is designed to remove foreign materials and impurities such as sand particles, stones, paddy straws and foreign seeds from paddy. This machine provides farmers an alternative replacement of current conventional method should the farmers want to extract the paddy seed in small scale amount. Currently, they only use a traditional winnow technique as to obtain the seeds to be used next season or before processing paddies to become rice. The performance of this machine is very efficient where the percentage of clean paddy is observed to be at 95%. It helps farmers improvise their traditional method, reduces purchasing cost of paddy seed and utilizes the cleaning process at low cost and less maintenance.

Cleaner production principle is adapted to minimize the waste generated by attacking the point of generation and using potion of treated wastewater for soaking process. Industrial Ecology concept is adapted by using by product (waste) of the process, paddy husk as a fuel initially to operate the boiler and later ash of the husk as filtering media of wastewater. In addition, steam generated by burning paddy husk will be partly used to rotate biological rotating disk which facilitate aerobic reaction. Treatment process consists of two stages and in the first stage, BOD value is reduced by aerobic digestion with the help of rotating biological contractors (RBC) and in the second stage pre-treated wastewater sent through a carbon filter in order to reduce COD.

The physical properties such as density, specific gravity, weight, size of the impurities and rice grains were considered. These properties form the basic information for the design of the rice destoner. Parameters such as capacity (quantity of feed), axial dimension of rice grain, coefficient of friction and sphericity of the rice were determined in other to have a comprehensive and effective design of the machine.

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