Category: paddy cleaner
By ricepolisher, 2018-06-21
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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By ricepolisher, 2018-06-20
rice destoner main features: 1.Nice effects of grading stone-relieving and low energy consumption; 2.Non-dust spreading, low noise and stable operation; 3.Uses double electrical machine vibration of high production efficiency; 4.Suitable for stone relieving of unhusked rice, wheat and corns after cleaning.
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By ricepolisher, 2018-06-14
paddy cleaner is used for a wide range of applications such as removing large impurities like stick, buck and leaves and are also used for removing fine dirt and sand from products in seed cleaning plants and seed processing plants. They incorporate two vibrating screens where the top screen performs the function of removing oversize material and the bottom screen removes fine dirt and sand. There are vibratory motors that are mounted in the center for vibration of the deck containing the screens. There are four hollow rubber springs on which the vibrating deck is mounted. This ensures that the vibration of the machine frame are reduced to a minimum. A swing down type door is also provided to ease change or cleaning of screens.
The important utilities in a rice mill are water, air, steam, electricity and labour. In a rice mill some of the operations are done manually namely, cleaning, sun drying, feeding paddy to the bucket elevators, weighing and packaging, etc. So the man-hours are also included in energy accounting. Water is used for soaking and steam generation. Electricity is the main energy source for these rice mills and is imported form the state electricity board grids. Electricity is used to run motors, pumps, blowers, conveyors, fans, lights, etc. The variations in the consumption rate of energy through the use of utilities during processing must also accounted for final cost of the finished product.
The grain’s bulk density, true density, and porosity is useful in sizing grain hoppers, storage facilities, and affects mass and heat transfer rates of moisture during aeration and drying processes. The ratio of the inter-granular void space volume and bulk volume of grain is porosity. Physical properties of plant and animal materials includes the voids within and among the particles. Drying of a grain bed with low porosity increases the water vapor escape resistance that can be overcome using higher power to drive the aeration fans. Some physical properties of rice seed. The differences between specific gravity and bulk density of the grain is the principle used for gravity cleaning of paddy separators to separate materials that have little difference in size and total mass. Principles and practices of rice production.
rice destoner is specifically designed for treatment of malting barley, seed grain and all other seed varieties. They are employed mainly for de-awning of barley, breaking clusters of beet seed and for surface polishing of grains and vegetable seeds thereby improving the appearance and increasing the bushel weight. Capacity up to 60 t/h. The Brush Machines are suitable for handling grass seeds and clovers, and separating double grasses. It is likewise used for removing the hairy tails from the germ end of oats. Capacity up to 4 t/h.
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