A Grain Cleaner is a very important equipment to clean the grain before storage (Pre-Cleaner) and before milling (Fine-Cleaner);
When we pass the grains through Pre-Cleaner before transferring the grains to Storage Silos it helps in achieving the following benefits
Aeration costs reduces as grain dust and impurities tend to generate high density areas which generates resistance to aeration flow
Reduces in-storage shrink loss of grains and grain damage also decreases due to infestation. Grain dust is highly susceptible to get infested.
Storage at higher moisture content possible due to lesser dust particles which develops into mould growth and foul smell in high moisture grains
Cleaning Reduces transportation costs
Cleaning grains makes the density inside silo uniform which improves the effectiveness of fumigation
Reduce requirement to turn-over the grains
Similarly when the grains are passed through fine cleaner
It makes good quality final product
Ensures customer satisfaction
Overall net profit
Hence Grain Cleaner must be selected with utmost care. A cleaner must have the following;
A good quality grain distributer to distribute grain evenly in all the screens
Screen to remove Oversize Impurities
Screen to Remove Under Size Impurities
Air drafts to remove fines and dust from input raw grains
Air drafts to remove fines and dust from clean grain outlet.
Air Path Changes to removes solid particles from fines alongwith Augers.
And Finally, adjustments and inspection windows to control / monitor what all you want to remove.
Besides above, you must consider power rating, air draft requirements, cyclone/bag filter requirements etc. Perforation percentage of screens, and its motion whether reciprocating or oscillating does affect the performance.
Please note that cleaner must not be there only for an eye wash. It must actually clean as it actually increases your profits.