What are the common sludge drying equipment

With the prosperity of urban construction and the rapid development of economy, all kinds of industrial sludge and urban sludge are increasing. After being treated by sludge drying equipment, the water content of these sludge is very low, which can be used in many fields, such as land use, environmental protection building materials, combustion power generation and so on. Moreover, the dried sludge is easier to store and transport, and the secondary pollution of the sludge to the environment is avoided. So what are the common sludge drying equipment on the market now?

1. Belt type sludge drying equipment

The wet sludge is continuously and evenly applied to the perforated belt and continuously transported into the drying area. At this time, the dry gas flows through the wet sludge to heat the wet sludge and evaporate water, so as to achieve the purpose of drying. The equipment has the advantages of simple structure, convenient maintenance and flexible configuration. It can dry, bake, burn or ripen the materials and can be operated for a long time. However, the capacity of belt type sludge drying equipment is small, which can only be applied to the drying of materials in small enterprises, and it is not suitable for the drying of high humidity and high viscosity materials.

2. Paddle type sludge drying equipment

The paddle sludge dryer is composed of Ω - shaped shell and hollow paddles densely arranged on the hollow shaft. Generally, there are 2 ~ 4 hollow mixing shafts in the shell. During the drying process, the heat medium provided by steam or heat transfer oil flows into the blade through the hollow shaft. While continuously stirring the wet sludge, the surface of the sludge is heated and a large amount of water is evaporated through the indirect contact between the heat energy and the material. The structure of paddle sludge drying equipment is relatively simple, occupies a small area, clean and environmental protection, but due to the use of indirect heating technology, the heat loss in the drying process is large, and the treatment capacity is small.

3. Multi return sludge drying equipment

In recent years, the multi return sludge drying equipment has gradually become a common sludge drying equipment in the drying market. The main body of the equipment is composed of three concentric cylinders with different diameters. The cylinder is equipped with a dispersing device and a lifting device, which greatly increases the contact area between materials and hot air, speeds up the drying speed and the utilization rate of heat energy. Due to the good insulation effect of the cylinder, the heat loss is greatly reduced, and the operation cost of the equipment is saved. The equipment has the advantages of large capacity, high utilization rate of heat energy, flexible operation and small floor area. It can be used for drying high humidity, high viscosity, solid waste and hazardous waste materials.