Tannery sludge dryer reduces difficulty and cost of hazardous waste disposal

With the gradual transfer of the world leather industry to China, China has gradually become a big leather country. Although the leather industry has brought great economic benefits to the country, it has also brought serious pollution problems to China's environment. China will produce about 1 million tons of tannery sludge every year. These sludge not only contains a lot of lime and organic matter, but also has a small amount of harmful substances. If the sludge is naturally discharged and stacked without any treatment, it will cause serious pollution to the environment and long-term damage to the ecological environment.

The traditional treatment methods of tannery sludge are stacking, landfill, incineration, building materials and composting. With the increasing attention to sludge disposal in China, tannery sludge dryer helps leather industry to solve the problem of sludge treatment and achieve the goals of sludge reduction, stabilization, harmlessness and resource disposal.

Tannery sludge dryer is the sludge is fed into the high-speed rotating drum through the feeding device. Under the dual effects of centrifugal force and centripetal force, the sludge is constantly thrown to the wall of the drum and back to the middle of the drum, and then reciprocating up and down in the drum. At the same time, the material is also transversely cut by the rotary rake device in the drum, and the material is strongly scattered and beaten by the feeding device It can effectively avoid the adhesion between sludge and equipment, accelerate the contact area between sludge and hot air, and accelerate the drying of sludge.

Jiaozuo ZJN tannery sludge dryer adopts low-temperature sludge drying technology. By reducing the drying temperature and increasing the air volume, the moisture content in the sludge is reduced to about 10% (the final moisture content can be adjusted according to the requirements of users), and the weight can be reduced by more than 50%. It has low energy consumption, no pollution and no waste heat emission. After drying, the sludge is dry and wet evenly, and the form can be adjusted according to the user's requirements, which is convenient for further use. It can be widely used in the drying of municipal sludge, industrial sludge, printing and dyeing sludge, pharmaceutical sludge, chemical sludge, electroplating sludge, papermaking sludge, coal sludge and other sludge. The equipment has the characteristics of automatic operation, simple and convenient, stable performance and convenient maintenance. The dried sludge can be used as biomass fuel and building materials for various capacity reduction and recycling.