Paddle Dryer For Sludge
30000.00 USD

Seller's Description

The hot air type means that the heat carrier (such as hot air) contacts and dries the material to be dried. In the conduction type, the heat carrier does not directly contact the material to be dried, but the hot surface and the material contact each other. Wedge-shaped hollow blades are densely arranged on the hollow shaft, and the heat medium flows through the blades through the hollow shaft. The heat transfer area per unit of effective volume is very large, and the temperature of the heat medium is from -40 to 320°C, which can be water vapor or liquid type: such as hot water, heat transfer oil, etc. Indirectly transmitted to heating, no air is carried to take away heat, heat is used to heat materials, and heat loss is only for 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, and the relative movement of the material particles and the wedge-shaped surface produces a scrubbing effect, which can wash off the attachments on the wedge-shaped surface, and maintain a clean heat transfer surface during the trial operation. The paddle dryer is composed of two to four paddle shafts that mesh with each other, a W-shaped shell with a jacket, a machine base and a transmission part. It is sent to the exhaust gas treatment device in a closed atmosphere to avoid environmental pollution. The dryer uses steam, hot water or heat transfer oil as the heating medium, and the shaft end is equipped with a rotary joint for the introduction and export of the heat medium. The heating medium is divided into two paths, which enter the jacket of the dryer shell and the inner cavity of the blade shaft respectively, and heat the body and the blade shaft at the same time to heat and dry the material by conduction heating. The material to be dried is continuously fed into the feeding port of the dryer quantitatively and continuously by the screw feeder. After the material enters the back of the machine, the material is turned over and stirred by the rotation of the paddle, and the heating interface is continuously updated. Heating to evaporate the surface water contained in the material. At the same time, with the rotation of the blade shaft, the material is conveyed in a spiral trajectory towards the discharge port, and the stirring is continued during the conveying, so that the water seeping out of the sludge continues to evaporate. Finally, the dry and uniform qualified products are discharged from the discharge port. a. The equipment has a compact structure and a small footprint of the device. It can be seen from the structure of the equipment that the heat required for drying is mainly provided by the walls of the hollow blades arranged on the hollow shaft, while the heat transfer from the walls of the jacket only accounts for a small part. Therefore, the heat transfer surface per unit volume of the equipment is large, which can save the floor space of the equipment and reduce the investment in infrastructure. b. High heat utilization rate. The sludge dryer is heated by conduction heating, and all heat transfer surfaces are covered with materials, which reduces heat loss; no hot air takes away heat, and the heat utilization rate can reach more than 90%.c. The wedge-shaped blade has self-cleaning ability, which can improve the heat transfer effect of the blade. The dispersing force generated by the combined movement of the inclined surface of the rotating blade and the particle or powder layer automatically removes the sludge attached to the heating inclined surface, and the blade maintains an efficient heat transfer function. In addition, due to the reverse rotation of the two-shaft paddles, alternately segmented compression (when the two-shaft paddle surfaces are closest to each other) and expansion (when the two-shaft paddle surfaces<a href><a> are farthest apart), the stirring function ensures uniform heat transfer and improves the heat transfer effect. Low temperature sludge drying system Automatic dosing system China Pool Chemical Dosing System Automatic polymer preparation system