KJG type hollow blade dryer

overview

This product can indirectly heat or cool paste, granular, powdered, and slurry materials, and can complete unit operations such as drying, cooling, heating, sterilization, reaction, and low-temperature combustion. The special wedge-shaped stirring heat transfer blade in the equipment has high heat transfer efficiency and self-cleaning function of the heat transfer surface.

Wedge shaped hollow blades are densely arranged on the hollow shaft, and the heat medium flows from the hollow shaft to the blades. The heat transfer area within the effective volume of a unit is very large. The temperature of the heat medium ranges from -40 ℃ to 320 ℃, and can be water or other liquids such as hot water, thermal oil, etc. Indirect conduction heating does not carry away heat with air, 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 device body. The wedge-shaped blade heat transfer surface has a cleaning function. The relative motion between the material particles and the wedge-shaped surface produces a washing effect, which can wash away the attached material on the wedge-shaped surface and keep the heat transfer surface clean during operation. The shell of the blade dryer is shaped, and generally two to four hollow mixing shafts are arranged inside the shell. The shell has sealed end caps and upper caps to fully prevent material dust leakage. The heat transfer medium flows through the shell jacket and 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.

characteristic

1. The blade dryer has low energy consumption. Due to indirect heating, it does not carry a large amount of air and take away heat. The outer wall of the dryer is also equipped with an insulation layer. For slurry materials, evaporating 1KG of water only requires a small amount of heat.

2. The blade dryer system has low cost and a huge heat transfer surface per unit effective volume, which shortens processing time. Due to the reduction in equipment size, the building area and space have been reduced.

3. By using different heat media, a wide range of materials can be processed, including heat sensitive materials and materials that require high-temperature treatment. Common media include water vapor, thermal oil, hot water, cooling water, etc. It can operate continuously or intermittently and can be applied in many fields.

4. Low environmental pollution, no use of portable air, and minimal powder material carryover. The solvent evaporation of the material is small, making it easy to handle. For materials that are contaminated or require solvent recovery, closed-loop circulation can be used.

5. The operating cost is low, and the device operates normally, with only 1 hour/day per person. Low speed stirring and reasonable structure. The wear and tear is small, and the maintenance cost is very low.

6. Stable operation. Due to the special compression expansion stirring effect of the wedge-shaped blade, the material particles are fully in contact with the heat transfer surface. In the axial range, the temperature, humidity, and mixing gradient of the material are very small, thereby ensuring the stability of the process.

Technical Parameter

Applicable Engineering Cases

1. Electroplating sludge drying equipment project

Electroplating sludge mainly comes from solid waste generated by industrial electroplating plants, which is mainly produced through liquid-phase chemical treatment of various electroplating waste liquids and electrolytes. The chemical composition of electroplating sludge is relatively complex, mainly composed of compounds of heavy metals such as iron, copper, zinc, and their soluble salts. Electroplating sludge has a high water content and complex composition, especially with heavy metal hazards. Therefore, reducing, harmless, and resourceful disposal of electroplating sludge is currently the focus of electroplating sludge disposal.

The reduction of electroplating sludge is mainly achieved by drying the electroplating sludge with a moisture content of about 75% to a moisture content of about 40% (semi drying), in order to meet the requirements of reduction, and then proceed to the next step of smelting and extracting metals such as iron, copper, and zinc.

Electroplating sludge dryer with two types of discs: wedge and disc

2. Printing and dyeing sludge drying equipment engineering

3. Engineering of domestic sludge drying equipment

In urban life and production, the main sludge generated includes domestic sewage sludge, industrial sewage sludge, water supply sludge, river dredging sludge, water supply and drainage pipe network sludge, etc Among them, domestic and industrial sewage sludge is the most abundant, highly polluted, hazardous, and difficult to dispose of.