Fertilizer Dryer
Fertilizer dryers are mainly used to dry organic materials with high moisture content (such as chicken manure, cow manure, pig manure, etc.) from the initial humidity of 70%-80% to a safe storage moisture of 10%-15% at one time126. The dried product can be used as organic fertilizer, feed (such as fish, chicken, duck feed) or edible fungus culture medium (such as Agaricus bisporus cultivation).
2. Working Principle
2. Working Principle
The core working principle of the fertilizer dryer is based on the heat and mass transfer process between hot air and materials, which is mainly divided into the following steps:
Hot air generation: The heat source (such as biomass combustion furnace, natural gas, steam heat exchanger) heats the air to 150-300℃ to form high-temperature hot air.
Material contact: The wet material enters the rotary drum through the conveying equipment. The drum is equipped with a lifting plate or a lifting device to continuously flip the material to increase the contact area with the hot air.
Water evaporation: The material contacts the hot air in a co-current or countercurrent manner, the water is heated and vaporized, and the exhaust gas is discharged after being treated by dust removal equipment (such as cyclone dust collector, bag dust collector).
Finished product discharge: The dried material is discharged through the discharge valve, and the moisture content can be reduced to 10%-15%, which meets the needs of subsequent processing.
Key influencing factors include temperature control (usually not exceeding 200℃ to avoid destroying organic matter), drum speed (balancing drying efficiency and residence time) and initial material characteristics (such as particle size and viscosity).
3. Equipment composition
The fertilizer dryer consists of multiple core components working together, mainly including:
Rotary drum: The main body is a tilted rotating cylinder with a built-in lifting plate or lifting device, which is responsible for material flipping and conveying.
Heat source system: such as hot air furnace and biomass burner, providing the heat energy required for drying.
Conveying device: including feeder, discharging machine, belt conveyor, etc., to achieve continuous in and out of materials.
Induced draft and dust removal system: The induced draft fan drives the air flow circulation, and the dust removal device (such as cyclone dust collector, wet scrubber) reduces dust pollution.
Control system: The power distribution cabinet and the automation module adjust the temperature, speed and other parameters to ensure stable operation.
Auxiliary structure: such as crushing device (crushing agglomerated materials) and sealing device (reducing heat loss).
4.Technical parameters
| Model | Drum size (diameter × length, mm) | Inclination (%) | Speed (r/min) | Power (kW) | Production capacity (t/h) | Hot air temperature (℃) |
|---|---|---|---|---|---|---|
| Ф1.5×12 | 1500×12000 | 3~5 | 2~6 | 15 | 3.5~9 | ＜800 |
| Ф2.2×20 | 2200×20000 | 3~5 | 1.5~6 | 30 | 12~20 | ＜800 |
| Ф3×25 | 3000×25000 | 3~5 | 1.5~5 | 75 | 32~40 | ＜800 |
5. Performance characteristics
High efficiency and energy saving: The multi-combination lifting device is adopted, the thermal efficiency is increased by 20%, and the coal consumption is reduced.
Continuous operation: High degree of mechanization, support 24-hour continuous operation, large production capacity (up to 40 t/h).
Environmental protection and safety: The closed system reduces the overflow of dust and odor, and is equipped with dust removal and deodorization devices (such as activated carbon adsorption).
Versatility: It is suitable for a wide range of materials, including feces, sludge, sawdust, etc., and the drying process has a sterilization effect.
Easy maintenance: Simple structure, replaceable gear design, reducing maintenance costs and downtime.
6. Application scenarios
Livestock and poultry manure treatment: Dry chicken manure, cow manure, etc. from 80% moisture content to 13% for organic fertilizer production.
Sludge resource utilization: Reduce sludge moisture for composting or incineration.
Feed processing: Dried chicken manure can be used as high-protein feed for aquaculture or poultry farming.
7 Summary
The fertilizer dryer realizes the resource utilization of organic waste through efficient heat exchange and mechanized design, which has both economic benefits and environmental value. Its technical parameters are diverse, and users need to choose the appropriate model according to the material characteristics (such as initial humidity, particle size) and production scale. PALET is an expert in the production of drum drying equipment and can provide customized services according to your needs.