Low-Temperature Belt Dryer
Applicable Raw Materials
Biogas residue, sludge, etc. after anaerobic fermentation.
Working Process
- Feeding:Biogas residue after pre-separation (with a moisture content of 60-80%) is fed into the dryer via a distributing machine and evenly spread on the drying belt.
- Drying:Materials are conveyed into the drying zone through the drying belt.
Natural air is heated to 70°C by a heat exchanger and then introduced into the dryer.
Hot air flows from top to bottom through the material layer, where moisture is removed by convective drying, and the heat from convective evaporation is carried away, cooling the hot air.
The hot air is discharged to dust removal equipment via an exhaust fan, then released into the atmosphere after harmless treatment.
The hot air at the tail of the dryer can be introduced into the feeding side of the equipment via a cirulating fan for reuse.
- Discharging:After passing through the drying zone, materials are discharged via a screw conveyor for subsequent utilization.
Equipment Characteristics
- Low Temperature and Low Energy Consumption:The drying heat source is hot water (120°C), with a heat consumption of less than 800,000 kcal per ton of evaporated water. The moisture content of the discharged material is controllable.
- Low Dust Emission:
- The dust concentration at the outlet of the dryer itself is less than 20 mg/Nm³. The hot air in the entire drying zone operates under negative pressure to prevent any internal hot air from escaping.
- Adjustable Parameters:The air volume of the fan and the running speed of the drying belt can be adjusted in real-time according to the material conditions.
