What are the types and characteristics of sludge drying equipment in the market

With the increasing application cases of sludge drying equipment, the treatment and disposal methods of sludge have been greatly changed. For example, sludge after dehydration by sludge drying equipment has effectively reduced volume and is more convenient for transportation and storage. It has been widely used in sludge landfill, sludge incineration, sludge land use, sewage sludge building materials utilization and other industries. Moreover, the hot and hot domestic sludge treatment market has also led to the emergence of various types of sludge drying equipment in China. What are the types and characteristics of sludge drying equipment in the market? For example, hollow paddle sludge drying machine with relatively high temperature in the sludge drying market, rotary sludge dryer with crushing device, etc.

Hollow blade sludge drying machine

The equipment consists of a shell with jacket, 2-4 blades, machine base and transmission device which are meshed with each other. Steam, heat transfer oil and hot water are used as heating medium. The hot medium enters into the jacket of the shell of the sludge drying equipment and the inner cavity of the blade shaft respectively. The body and the blade shaft are heated, and the sludge at the other end of the body is heated by heat transfer, and a large amount of sludge is evaporated Water. In addition, the blade has the function of cutting, stirring and self cleaning for sludge, which can clean the attached materials, so that the clean heat transfer surface is maintained in the operation. The whole equipment is provided with a sealed end cover and an upper cover to prevent the material dust from overflowing.

The characteristics of sludge drying equipment for hollow blades: 1. According to the equipment structure, the heat needed for drying is mainly provided by the hollow blade surface arranged on the propeller shaft, with large heat exchange area. However, due to the indirect heat transfer method, the heat loss in the drying process is more. 2. The dryer has low flow of hot gas, less dust particles trapped by gas, simple waste gas treatment after drying and small scale of waste gas treatment device. 3. The equipment has low operating cost and small processing yield, which is easy to cause the adhesion agglomeration of high wet sludge, which is not suitable for drying high humidity and high viscosity materials.

Rotary drum sludge drying equipment with crushing device

The equipment adopts direct heating drying technology, which can directly contact with sludge through hot air. Under various drying methods, such as downstream drying, reverse flow drying and reciprocating drying, the moisture in sludge can be fully evaporated and dry sludge products with low water content and even drying are obtained.

The main body of the equipment is a slightly inclined rotary drum, a special structure of three-layer rollers nested with each other, and then the breaking device set in the cylinder can break the large materials with high humidity and high viscosity into small particles, and fully contact with hot air. Besides, various lifting plate devices are arranged in the drum, which can lift and release the sludge continuously, effectively improving the sludge Drying efficiency.

Characteristics of sludge drying equipment with crushing device: 1. Because of the special structure of three-layer sleeve, the length of the cylinder is much smaller than that of single drum dryer, with small floor area and less foundation investment. 2. The direct heat transfer method increases the utilization rate of heat energy, reduces the heat transfer loss and reduces the equipment operation consumption. 3. It is widely used for drying of various high humidity and high viscosity materials.