Printing and dyeing sludge dryer project overview

　　Printing and dyeing wastewater has high organic concentration and chromaticity, complex components, and is usually treated by physical-chemical and biological methods. Printing and dyeing sludge is the by-product of printing and dyeing wastewater treatment, which is an extremely complex non-homogeneous body composed of organic debris, bacterial bodies, inorganic particles, colloids, etc. If it is directly discharged without treatment, it can cause greater pollution to the environment. And sludge drying treatment can be thorough, rapid and ^ large limit of capacity reduction, is expected to become the mainstream technology of printing and dyeing sludge treatment and disposal.

　　For the relevant characteristics of printing and dyeing sludge, our company has developed KJG series hollow paddle dryer and highly efficient exhaust gas treatment device, which is proved by many customers after actual use and sufficient data: the equipment can fully meet the drying requirements of printing and dyeing sludge, with stable operation of the whole machine, uniform mixing, high thermal efficiency, good drying effect, low energy consumption, and low operating costs.

　　The system includes heating system, inlet and outlet system, drying system and exhaust gas treatment system.

Printing and dyeing sludge dryer working principle

　　The heat transfer surface of hollow paddle dryer has several parts such as blade, stirring shaft and wall, and the heat transfer area of blade accounts for a large part, so the equipment has compact structure and large heat transfer area per unit volume. In addition, stirring and mixing make the sludge flip violently, so as to obtain a high heat transfer coefficient, so the floor space and space are very small, saving the cost of plant infrastructure. Drying process gas dosage is less, the flow rate is low, the amount of dust taken away by the gas is less, so it is convenient to recover the gas dust after drying, and the volume of the recovery equipment is small, which can save the investment of provincial equipment.

　　The core of paddle dryer is two hollow shafts and the hollow stirring paddle welded on the shaft. The shape of the paddle is wedge-shaped hollow semicircular, can be passed into the heating medium. In addition to the role of stirring, but also the equipment of the heat transfer body. The two main heat transfer side of the paddle blade is beveled, so when the material is in contact with the beveled surface, with the rotation of the blade, the particles quickly slide away from the beveled surface, so that the heat transfer surface is constantly updated, and strengthen the heat transfer. A scraper is provided at the triangular bottom of the paddle to scrape up the material deposited at the bottom of the shell to prevent dead space.