When using a belt dryer to dry onions, there are some important issues and considerations to consider to ensure effective and safe drying. Here are some key questions:

1. Temperature control: When onions are dried in a belt dryer, temperature control is very important. Temperatures that are too high may cause the onions to lose moisture and become too dry, while temperatures that are too low may cause drying times to be too long and reduce efficiency. Therefore, set the appropriate temperature.

2. Ventilation: Make sure the belt dryer has a good ventilation system to remove heat and steam, reduce moisture content and prevent the occurrence of mold and mildew.

3. Drying time: The drying time of onions depends on their humidity and temperature. Check the onion moisture regularly and adjust the drying time to ensure the desired degree of dryness is achieved.

4. Air quality: Make sure the air inlet and outlet of the belt dryer are clean to prevent pollutants from entering the drying room and affecting the quality of onions.

5. Check dryer maintenance: Regularly check and maintain the belt dryer to ensure its normal operation. This includes cleaning drums, cleaning filters, inspecting drivetrains and servicing electrical components.

6. Storage and packaging: Once the onions are finished drying, they need to be stored in a dry environment and sealed in suitable packaging to prevent moisture absorption and maintain quality.

The belt dryer is an efficient drying equipment, but it needs to be operated with care to ensure the best drying effect and product quality. Drying parameters should be adjusted according to the specific situation and onion requirements.

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