Q: What materials can a drum dryer dry?
A: 1. Mainstream grains: Wheat, rice, corn, sorghum, soybeans, and other grain crops; suitable for both high and low moisture content grains.
2. Cash crops: Peanuts, rapeseed, cottonseed, and other oilseeds, as well as granular medicinal and edible crops such as goji berries and red dates.
3. Other pellets: Feed pellets, small medicinal herb granules (such as Isatis root).
Q: What are the heat sources for a drum dryer?
A: 1. Biomass heat source (straw, sawdust)
2. Gas/oil heat source (natural gas, diesel)
3. Electric heating
4. Coal heat source
5. Mixed heat sources
Q: How to set the drying temperature for different grains?
A: 1. Heat-sensitive grains (wheat, rice, oats): 35-50℃. For initial moisture content ≤18%, set 35-40℃; for 18%-25%, set 40-45℃; for >25%, pre-dry at 35℃ for 1 hour before increasing the temperature to prevent cracking.
2. Heat-resistant grains (corn, sorghum): 45-80℃. For corn, with moisture content 20%-25%, set 50-60℃; for >25%, set 60-70℃. Soybeans have high oil content; control the temperature at 45-55℃ to prevent oil oxidation.
Q: Grains stick to the inner wall of the drying drum. How to solve this?
A: 1. Pre-dry the grains for 1-2 hours to reduce surface moisture.
2. Preheat the drum to 40℃ with an empty machine before feeding.
3. Increase the hot air volume to accelerate moisture evaporation.
4. Replace small grain particles with baffles with guide grooves to prevent sticking.
Q: What maintenance should be performed on the equipment after each day's use?
A: 1. Clean the drum: Open the inspection door and use a soft brush to sweep away any residual grain from the inner wall and lifting plate to prevent mold and contamination;
2. Remove dust: Remove the dust collector bag and beat it to remove dust; replace any damaged bags promptly;
3. Check components: Check the tension of the drive belt and add special lubricating oil to the bearings (once a month).