According to the parameters provided by customers, our company has designed and customized a printing and dyeing sludge hollow paddle dryer for a printing and dyeing company in Nantong, Jiangsu Province. After a period of operation, the drying effect is very ideal.
The special dryer for printing and dyeing sludge can dry the printing and dyeing sludge with moisture content of 75% - 85% after mechanical pressure filtration, and the moisture content of the dried sludge can reach 20% - 30%. At this time, the sludge is in the shape of small particles, the combustion heat value can reach about 2000 kcal / kg, and the combustion value of 2-3 tons of dry sludge is equivalent to 1 ton of coal, which has the equivalent energy utilization value. After drying and burning, the printing and dyeing sludge can be recycled and utilized innocuously, decrementally and resourcefully, and the pollution to the environment can be greatly reduced.
The hollow paddle dryer for printing and dyeing sludge is a kind of horizontal agitated dryer mainly for heat conduction. The heat required for equipment drying is indirectly heated by heat conduction, so only a small amount of gas is needed in the drying process to take away moisture, which greatly reduces the loss of heat taken away by the gas and improves the utilization rate of heat. The whole drying process is carried out in a closed state, and the organic volatile gas and peculiar smell gas are sent to the tail gas treatment device in a sealed atmosphere to avoid the ring Environmental pollution, so the equipment is an environmental protection and energy-saving drying equipment, and has been recognized by the environmental protection department.
1. The equipment is compact in structure and covers a small area. It can be seen from the structure of the equipment that the heat required for drying is mainly provided by the wall surface of the hollow blade arranged on the hollow shaft, while the heat transfer on the wall surface of the jacket only accounts for a small part. Therefore, the heat transfer area per unit volume of equipment is large, which can save the occupied area of equipment and reduce the capital construction investment;
2. High heat utilization. The paddle dryer uses the conduction heating method to heat, all the heat transfer surfaces are covered with materials, which reduces the heat loss; without air to take away heat, the heat utilization rate can reach more than 80%;
3. The wedge-shaped blade has self-cleaning ability, which can improve the conduction function of the blade. The dispersing force generated by the combined movement of the inclined plane of the rotating blade and the particles or powder layer can automatically remove the materials attached to the heating inclined plane, and the blade maintains an efficient heat transfer function;
4. Stable operation and low cost: low speed mixing and reasonable structure, small wear, low maintenance cost;
5. The adaptability of material moisture content is wide, and the drying uniformity of product is high. The dryer is equipped with overflow plate, which can adjust the residence time of materials in the dryer according to the properties and drying conditions of materials, so as to meet the requirements of the change of moisture content of materials. In addition, the feeding speed, shaft speed and temperature of the heat load can be adjusted, and the residence time can be arbitrarily selected between minutes and hours. Therefore, the adaptability to the change of moisture content of materials is very wide.
6. The feeding adopts the shaftless screw conveyor, which can transport the muddy materials with large viscosity and high water content.
7. The tail gas recovery adopts closed-circuit circulation, and the evaporated water is taken to the tail gas cooling tower by the induced draft fan. The cooling tower is equipped with a cooler, and the cooling water is pumped into the cooler by the water pump. The tail gas condenses the water vapor into water after passing through the cooler. The tail gas is then dehumidified by the water film dust remover, and then returned to the fresh air inlet, and then heated again into the inside of the drying cabinet to form a closed circuit Circulation, reduce environmental pollution.