Success Stories
The sludge dehumidification & drying machine uses a dehumidification heat pump to condense and dry the sludge with hot air circulation;
90% of the heat supplied by the traditional thermal drying system for sludge is converted into the heat loss during the drying process.
Dehumidification and drying system recovers the latent heat of steam and the sensible heat of hot air, and no wasted heat has been discharged during the dehumidification and drying process.
Comparison of advantages between low-temperature dehumidification and drying methods and traditional drying methods
| project | Tumble type (using the waste heat to dry) | Turntable type(vertical type or horizontal type) | Thin evaporator with belt drying | Paddle type | Low temperature dehumidification and drying |
| Drying temperature | 200-300℃ | >150℃ | >150℃ | >150℃ | 40-80℃ |
| Drying method | Thermal convection (direct) | Heat conduction (indirect) | Heat conduction (indirect) | Heat conduction (indirect) | Hot air circulation |
| Heating method | Hot air, vapor | Steam,Thermal oil | Steam | Steam,Thermal oil | Heat pump |
| Dust content | High | Low | Low | Relatively high | none |
| Security | High water filling degree, high operating temperature | high operating temperature with nitrogen | high operating temperature | high operating temperature | Low temperature |
| Waste disposal system | Complicated system | Deodorization system | Deodorization system | Deodorization system | none |
| Mechanical friction | High | High | High | High | None |
| Heat consumption(KJ/kg) | 3400 | 2800 | 2300 | 2800 | None |
| Electricity consumption(Kwh/kg) | 0.07 | 0.05 | 0.053 | 0.04 | 0.25 |
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