Petrochemical sludge hollow blade paddle dryer

Description of hollow paddle dryer:

Thermal drying is an intermediate sludge treatment process that consists of evaporating the water in the sludge. It significantly reduces the volume and weight of the sludge so that it is easier to recover.

The hollow paddle dryer is an indirect heating type composed of the casing with a jacket and shaft with a disc that contains steam or other heating media, Hollow paddle dryer (also called disc dryer) can dry all kinds of animal waste in an atmosphere controlled environment with multi-point thermal control, such as poultry entrails, municipal sludge, textile sludge, catering sludge, chemical sludge, etc.

The paddle (discs ) cover 80% of the total heating surface.

Compared to the other indirect heating dryer, the disc has a compact design and high thermal efficiency.

Features of hollow paddle dryer:

1.The heat required for dying is mainly provided by the wall of the hollow paddle installed on the hollow shaft, while the heat conduction though the surface of the jacket is very limited comparatively Therefore, the heat exchange area per unit volume of the equipment is large and the floor space required is small.

2.The machine uses heat conduction as the processing method. The entire heat exchange surface is covered by the material to reduce heat loss. The heat utilization rate is above 85%.

3.The paddle has the structure that consists of the inclined concentric reducers. This structure has a certain amount of extrusion and dispersion ability, and it can improve the heat conduction performance of the paddle. The dispersing force due to the combined movement of filter cake or powder particles driven by the inclined surface of the rotating paddle makes it easier for the materials attached to the heating surface to fall off. Also, since the double shaft paddle rotate reversely and expand alternately by sections, it has the function of mixing and cutting, in which case the drying efficiency can be improved significantly .

4.This equipment allows continuous and completely sealed environment for operation, which can reduce the amount of labor required and reduce dust emission as well.

5.The exhaust gas treatment system generally uses negative pressure, with cyclone separator cloth bag or water flm dust scrubber to reduce the volume of exhaust gas and reduce dust emission as well.

Parameters of hollow paddle dryer: