Sludge paddle dryer

Overview of Sludge Paddle Dryer Project

The sludge paddle dryer is a specialized sludge dryer designed by our factory for sludge generated by urban sewage treatment plants, printing and dyeing plants, paper mills, electroplating plants, thermal power plants, chemical plants, etc., to solve the problem of sludge problems for you. Generally, the initial moisture content of sludge is 80%, and the final moisture content after drying is 10% -50%. It is common to have a moisture content of around 30%. Dry sludge can be mixed with coal powder to form loose powder particles and directly enter the boiler for combustion. The calorific value of sludge is about 1500-2000 kcal, which can save energy and be reused. Some sludge can also be made into fertilizers and building materials after drying, or directly buried without causing secondary pollution, turning waste into treasure, fully meeting environmental protection requirements. This equipment has low energy consumption, and can use steam, thermal oil, and other heat sources The flue gas heating (evaporation of 1kg of water consumes 1.1-1.3kg of steam) has the advantages of low power consumption, stable operation, low noise, and low labor consumption, and is basically fully automatic production.

Working principle of sludge dryer

Wedge shaped hollow blades are densely arranged on the hollow shaft, and the thermal medium flows through the blades through the hollow shaft. The heat transfer area per unit effective volume is large, and the temperature of the thermal medium ranges from -40 ℃ to 320 ℃. It can be water vapor or liquid, such as hot water, heat transfer oil, etc. Indirect conduction heating does not carry air away heat, and the heat is used to heat the material. The heat loss is only the heat dissipation to the environment through the insulation layer of the body. The wedge-shaped blade heat transfer surface has self-cleaning function. The relative motion between material particles and the wedge surface produces a washing effect, which can wash away the attached materials on the wedge surface and maintain a clean heat transfer surface during operation. The shell of the pulp dryer is an Ω type, and two to four hollow mixing shafts are generally arranged inside the shell. The shell has a sealed end cover and an upper cover to prevent the leakage of material dust and fully play its role.

The heat transfer medium flows through the shell jacket and the hollow stirring shaft through a rotating joint. The hollow stirring shaft has different internal structures based on the type of heat medium to ensure heat transfer efficiency.