Sludge paddle dryer

Sludge paddle dryer project overview

The sludge paddle dryer is a special sludge dryer specially designed by our factory for sludge produced by urban sewage treatment plants, printing and dyeing plants, paper mills, electroplating plants, thermal power plants, chemical plants, etc. question. Generally, the initial moisture of sludge is 80%, the final moisture after drying is 10%-50%, and the moisture content of about 30% is more common. The dried sludge can be mixed with pulverized coal and directly into the boiler for combustion. The calorific value of the sludge is about 1500-2000kcal, which can save energy and be reused. Some sludge can also be made into fertilizers and buildings after drying. materials, or direct landfill will not cause secondary pollution, turning waste into treasure, and can fully meet environmental protection requirements. -1.3kg steam) has the advantages of low power consumption, stable operation, low noise and small labor consumption, and is basically fully automatic production.

Working principle of sludge dryer

The hollow shaft is densely arranged with wedge-shaped hollow blades, and the heat medium flows through the blades through the hollow shaft. The heat transfer area per unit of effective volume is large, and the temperature of the heat medium ranges from -40°C to 320°C, which can be water vapor or liquid: such as hot water, heat transfer oil, etc. Indirect conduction heating, no air is carried to take away the 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 heat transfer surface of the wedge-shaped blade has a self-cleaning function. The relative movement of the material particles and the wedge surface produces a scrubbing effect, which can wash off the materials attached to the wedge surface, so that a clean heat transfer surface is always maintained during operation. The shell of the paddle dryer is Ω type, and two to four hollow stirring shafts are generally arranged in the shell. The shell has a sealed end cover and an upper cover to prevent material dust from leaking out and play a full role. The heat transfer medium flows through the shell jacket and the hollow stirring shaft through the rotary joint. The hollow stirring shaft has different internal structures according to the type of heat medium to ensure the heat transfer effect.