What’s a dryer?
A dryer is a mechanical machine or machine that removes the water from wet grains by forcing either ambient air or heated air through the grain bulk.
Why is proper usage of a dryer important?
Any delay in drying of wet paddy leads to rapid deterioration of quality. A dryer that does not perform well or is just not operated properly can cause a number of problems:
Prolonged drying time because of inefficient air delivery or low temperature
Uneven drying of grains due to uneven airflow or very high temperature (batch dryers)
High fuel consumption as a consequence of ineffective air distribution or very high airflow rate
Low germination rate on account of very high drying air temperatures
High number of broken grains as a consequence of mixing of dry with wet grains or on account of moisture gradient
Fire hazard and hazard of carbon monoxide (CO) poisoning of operators from using unsafe burners
What’s the proper way of drying?
For optimum drying, apply proper pre-drying management and operate the dryer according to the manual.
Earlier than drying
Stop any delay in drying after harvest. Should you can’t dry the paddy to the desired moisture content material, at the very least pre-dry it to 18%, which is safe for temporary storage for as much as two weeks.
Clean the grains earlier than drying to keep away from uneven drying and wet spots.
Do not combine grains with completely different moisture contents to keep away from cracking.
Read the operator’s manual and familiarize yourself with the dryer operation.
Using the dryer
Load the dryer with wet paddy, considering the minimum load. Do not overload.
With very wet paddy or when paddy tons with totally different moisture contents are combined, aerate or flow into the grains for 15−30 min earlier than turning the heater on to reduce broken grains.
In a batch dryer with more than 30 cm grain depth, mix the grains a minimum of as soon as for more even drying.
Monitor grain temperature and moisture content to stop extra temperature and over drying.
Dry paddy after harvest to 18% moisture content material for storage as much as weeks.
Dry paddy for milling to 14% moisture content. Drying under 14% reduces weight and milling yield.
For eight−12-month storage, dry to thirteen% or less; for long-term storage exceeding 1 year, dry to 9%.
Safety precautions
Always operate the dryer following the steps given within the manual.
Check burners or furnaces commonly to forestall fire hazards and excess CO production. Always have a fire extinguisher at hand.
Make positive that fuel lower-off valves that disconnect the fuel supply in case of power cuts are functioning.
Ensure proper ventilation within the working area to prevent CO poisoning.
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