Sludge drying equipment is a drying equipment that dries various activated organic sludge and then produces sludge bio-organic fertilizer. The drying of the sludge makes it possible to use the sludge for agriculture, fuel, incineration and even reduce landfills.
Why we need to drying sludge?
Three main worths of sludge drying:
- to removed water in the sludge, the volume of the sludge can be reduced, and the cost of sludge treatment can be reduced.
- to make physical and chemical properties of the sludge are stabilized, and further degradation will not occur during sludge disposal to avoid secondary pollution.
- to render sludge use for aerobic composting, incineration, resource reuse, or even landfill
What is sludge dryer machine ?
A sludge drying equipment used to evaporate the water in the sludge, there are mainly two types of indirect or direct evaporation.
According to the drying method, sludge dryers are divided into the following three types:
- direct drying
- indirect drying
- solar drying
Direct Drying is the most commonly used drying type for sludge treatment in sewage treatment. The sludge is in direct contact with the heat source, thereby evaporating the water in the sludge. Since the process requires a large amount of heat source consumption, the heat source is usually recycled during the evaporation process to save energy.
Direct drying mainly includes:
- Belt Conveyor Dryer
- Fluid Bed Dryer
- Drum Dryer
- Flash Dryer
Indirect Drying also known as conduction dryer, uses conduction to transfer heat from heat source to wet materials through metal partitions, and the generated moisture vapor can be removed by vacuum suction, a small amount of steam or condensation recovery at a separate low temperature. go,. This type of dryer does not use drying medium, has high thermal efficiency, and the product is not polluted, but the drying capacity is limited by the heat transfer area of the metal wall, the structure is also complex, and it is often operated under vacuum.
Indirect drying mainly includes:
- Paddle Dryer
- Disc Dryer
- Film Dryer
The solar dryer is a drying equipment that uses the heat energy of solar radiation to evaporate the moisture in the wet material.
