Product Overview:Product IntroductionThe pulp leaf dryer can indirectly heat or cool paste, granular, powder, and slurry materials, and can complete unit operations such as drying, cooling, heating, reaction, and low-temperature combustion. The special wedge-shaped stirring heat transfer blade in the equipment has h
Product Introduction
The pulp leaf dryer can indirectly heat or cool paste, granular, powder, and slurry materials, and can complete unit operations such as drying, cooling, heating, 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.
operational principle
Wedge shaped hollow blades are densely arranged on the hollow shaft, and the hot medium flows through the blades through the hollow shaft. The heat transfer area per unit effective volume is large, and the temperature of the thermal medium ranges from -40 ℃ to 320 ℃. It can be steam or liquid, such as hot water, thermal oil, etc. Indirect conduction heating does not carry air away 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 device. The wedge-shaped blade heat transfer surface has self-cleaning function. The relative motion between material particles and the wedge surface generates a cleaning effect, which can wash away the attached materials on the wedge surface and maintain a clean heat transfer surface during operation. The shell of the blade dryer is Ω type, and two to four hollow mixing shafts are generally arranged inside the shell. The shell has a sealed end cover and an upper cover to prevent material dust from leaking out and fully play its role.
The heat transfer medium flows through the shell jacket and the hollow stirring shaft through a rotating joint. The hollow stirring shaft has different internal structures according to the type of heat medium to ensure good heat transfer effect.
Performance characteristics
Hollow blade dryer has low energy consumption: due to indirect heating, there is not a large amount of air carrying away heat. The outer wall of the dryer is also equipped with an insulation layer, which only requires 1.2kg of water vapor to evaporate 1kg of water for slurry materials.
The cost of the blade dryer system is low: it has a huge heat transfer surface per unit effective volume, which shortens processing time and reduces equipment size. This greatly reduces the building area and space.
◎ Wide range of material processing: using different thermal media, it can handle both thermosensitive materials and materials that require high-temperature treatment. Common media include steam, heat transfer oil, hot water, cooling water, etc.
It can be operated continuously or intermittently and can be applied in many fields.
◎ Low environmental pollution: Do not use carrying air, and carry very little dust and materials. The solvent evaporation of the material is very small, making it easy to handle. For contaminated materials or working conditions that require solvent recovery, methods can be used
Closed loop.
Low operating cost: the structure. Low wear and tear, low maintenance costs.
◎ 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. Within the axial range, the temperature, humidity, and mixing gradient of the material are very small, ensuring the stability of the process.
