Sludge is a solid sedimentary material produced by water and sewage treatment processes. Its main characteristics are: high water content, high organic content, easy to decay and odor, and fine particles, small specific gravity, gelatinous liquid. Sludge according to the source are: domestic sewage sludge, industrial wastewater sludge and water supply sludge. Disposal and treatment of various sludge has become a persistent problem that restricts urban development and urban health.

　　Small sludge dryer is a kind of indirect heating low-speed stirring dryer, there are two or four hollow rotating shafts inside the equipment, and the hollow shafts are densely arranged in parallel with the fan wedge-shaped hollow blades, with a special and ingenious structural design. The relative rotation of the shaft body, the use of angular velocity is the same but the principle of different linear velocity and structure cleverly achieve the self-cleaning effect of the sludge on the shaft body, a large limit to prevent the phenomenon of holding the shaft in the process of sludge drying.

　　The following is to introduce you to the characteristics of small sludge dryer:

　　1、Because the heat required for equipment drying relies on indirect heating by heat conduction, so the drying process does not require or only a small amount of gas to take away the moisture. Reduces the loss of this part of the heat taken away by the gas flow, improves the utilization rate of heat, is a kind of energy-saving drying equipment.

　　2、Stirring and mixing make the material flip violently, so as to obtain a high heat transfer coefficient, so it occupies a small area and space, saving the cost of plant infrastructure. Drying process gas dosage is small, the flow rate is low, the amount of dust taken away by the gas is small, so it is convenient to recover the gas dust after drying, and the volume of the recovery equipment is small, so it can save the equipment investment. For the drying process which needs to recover solvent, the concentration of solvent can be greatly improved. Due to the special structure of paddle, the material receives extrusion and relaxation alternately in the drying process, which strengthens the drying. The filling rate of the material inside the drying chamber is very high, which can reach 80%-90%, and the residence time of the material can be adjusted by adjusting the parameters such as charging speed, stirring shaft rotation speed, and filling degree of the material, which can be adjusted arbitrarily from a few minutes to a few hours.

　　3, can be used for municipal sludge, printing and dyeing sludge, papermaking sludge, electroplating sludge and other fields of sludge drying, high thermal efficiency, wide range of use, low operating costs, and can also realize continuous production.