Product Introduction
The blade dryer 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. Special wedge-shaped stirring heat transfer in equipmentoarLeaves have high heat transfer efficiency and self-cleaning function of heat transfer surfaces.

Working Principle:
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 within a unit effective volume is large, and the temperature of the heat 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 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. wedge-shapedoarThe leaf heat transfer surface has self-cleaning function. The relative motion between the material particles and the wedge-shaped surface produces a scrubbing effect, which can wash away the attached material on the wedge-shaped surface and maintain a clean heat transfer surface during operation.oarThe shell of the leaf dryer is Ω - shaped, and generally two to four hollow mixing shafts are arranged inside the shell. The shell has sealed end caps and upper caps to prevent material dust leakage and fully exert its function.
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.

Performance characteristics:
◎oarLow energy consumption of leaf dryer:Due to indirect heating, there is no large amount of air carried away to remove heat, and the outer wall of the dryer is also equipped with an insulation layer. For slurry materials, only 1.2kg of water vapor is needed to evaporate 1kg of water.

◎oarLow cost of leaf dryer system:Having a huge heat transfer surface within a unit of effective volume shortens processing time and reduces equipment size. This greatly reduces the building area and space.

◎ Wide range of material processing:By using different heat media, both thermosensitive materials and materials that require high-temperature treatment can be processed. Common media include steam, thermal oil, hot water, cooling water, etc. It can operate continuously or intermittently and can be applied in many fields.

Low environmental pollution:Not using carrying air, with minimal dust material entrainment. The solvent evaporation of the material is very small, making it easy to handle. For materials that are contaminated or require solvent recovery, closed-loop circulation can be used.

Low operating costs:The wear and tear is small, and the maintenance cost is very low.

◎ Stable operation:Due to the wedge-shaped designoarThe special compression expansion stirring effect of the blade ensures that 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.

Suitable materials:
oarThe leaf dryer has been successfully used in fields such as food, chemical, petrochemical, dye, and industrial sludge. The characteristics of heat transfer, cooling, and stirring of the equipment enable it to perform the following unit operations: combustion (low temperature), cooling, drying (solvent recovery), heating (melting), reaction, and sterilization. stiroarLeaves are also heat transfer surfaces, which increase the heat transfer area per unit effective volume and shorten the processing time. wedge-shapedoarThe heat transfer surface of the blade also has self-cleaning function. The compression expansion mixing function ensures uniform mixing of materials. The material moves in a 'piston flow' along the axial direction, and within the axial range, the temperature, humidity, and mixing gradient of the material are very small. Low temperature combustion can be achieved by using thermal oil as the heat medium in a blade dryer. For example, calcium sulfate dihydrate (Ca2SO4 · 2H2O) is burned and converted into calcium sulfate hemihydrate (Ca2SO4 · 1/22H2O). Cooling media such as water, cooling salt water, etc. can be used for cooling. For example: used in the soda ash industryoarThe leaf type cooling alkali machine replaces the old-fashioned air-cooled cooling alkali machine, saving energy and exhaust gas treatment equipment, and reducing operating costs. Drying, the main function of the equipment, does not use hot air, making solvent recovery, energy consumption, and environmental control in an ideal state that is easy to handle. It is particularly suitable for solvents that need to be recycled, flammable and easily oxidizable heat sensitive materials. It has been widely used in the fine chemical, petrochemical, and dye industries. The uniformity of temperature, humidity, and mixing degree within the axial range allows the equipment to be used for heating or melting, or for some solid material reactions. It has been successfully used in the compound fertilizer and modified starch industries. A blade dryer can be used to sterilize food and flour. The large heating area within the effective volume of the unit quickly heats the material to the sterilization temperature, avoiding prolonged heating and changing the quality of the material.

Equipment composition:

It is mainly composed of transmission mechanism, housing, spindle mixing, bearing body, discharge adjustment mechanism, rotary joint and other components.

1. Power transmission part: mainly composed of electric motor, reducer, driving gear, driven gear, inter shaft gear, etc. Its main function is to transmit the power of the motor to the main shaft mixing part, so that it can operate within the rated speed range. It can also choose variable frequency speed regulation or electromagnetic speed regulation configuration for variable speed operation according to user requirements.

2. Main shaft mixing part: mainly composed of two hollow shafts and several wedge-shaped hollow blades on their surfaces. A heat transfer (heating or cooling) medium (steam, water, oil, etc.) reflux pipe is installed inside the hollow shaft, and the rotating joints configured at both ends or one end are the interfaces for these media to enter and exit. During operation, the main shaft stirring part stirs, pushes, and heats or cools the materials.

3. Bearing body part: Three or two bearing bodies are configured at both ends of the main shaft, consisting of bearings, bearing seats, bearing covers, sealing packing, packing covers, maintenance covers, etc. The power end is equipped with two main and auxiliary bearing bodies. The main bearing body is the main support point of the main shaft and serves as the positioning point for axial movement. The auxiliary bearing body is designed to prevent excessive deformation of the shaft head. The non power end bearing body not only provides the bearing point for the main shaft, but also allows the main shaft to expand and contract freely. Each bearing body is equipped with a cooling structure for the bearings.

4. The discharge adjustment mechanism is mainly composed of an adjustment plate, a rotating shaft, positioning components, etc.

5. Cylinder thermal jacket, the cylinder is composed of an approximately W-shaped structure cavity and a top cover, the cavity contains materials inside, and the hollow jacket is filled with heating medium; The top cover is equipped with a feed inlet, a manhole, and an evaporative gas outlet.

6. The propeller shaft equipment has two hollow propeller shafts that mesh with each other. Each hollow blade is welded to the hollow shaft, and the shaft cavity is connected to all the turntable cavities. The internal structure of the shaft is divided into two types: L-type and G-type, with the main functions of feeding and conveying materials; Mixing and blending materials; Heating materials.

7. The driving shaft and the driven shaft are driven by gears that mesh with each other.

Technical specifications: