Brief introduction of ceramic granulation high-speed centrifugal spray dryer
1 Introduction to equipment functions and principles
The spray dryer is a type of continuous atmospheric dryer. The liquid material is sprayed into a mist with special equipment to make it contact with hot air and be dried. Used to dry some heat-sensitive liquids, suspensions and viscous liquids, such as milk, eggs, tannins and medicines. It is also used for drying fuels, intermediates, soap powder and inorganic salts.
After filtering and heating, the air enters the air distributor on the top of the dryer, and the hot air enters the drying chamber evenly in a spiral shape. The material liquid passes through the high-speed centrifugal atomizer on the top of the tower body, and (rotating) sprays into very fine mist liquid beads, which can be dried into finished products in a very short time in cocurrent contact with hot air. The finished product is continuously output from the bottom of the drying tower and the cyclone separator, and the waste gas is evacuated by the induced draft fan.
2. Overall structure (subject to the final design of the supplier)
The equipment is mainly composed of: feeding system, heating system, dry air device, atomization system, spray drying system, and product recovery system.
3. Feeding system
The feeding system includes: feeding peristaltic pump, feeding pipeline, and atomizer. Firstly, put the configured slurry into the batching tank, and after stirring evenly, driven by the peristaltic pump, the slurry reaches the atomizer through the pipeline valve , The atomizer needs to be equipped with a special atomizer nozzle made by Shanghai Qiaofeng, and the nozzle life is guaranteed for one year.
4. Heating system
The heating system consists of an electric heating system. The closed heating element directly heats the drying medium in the pipeline and passes through a set of pressure regulating control devices. The temperature accuracy is controlled within ±2°C, and the maximum temperature of the heater is 220°C.
Ceramic granulation high-speed centrifugal spray drying unit
5. Drying tower
The drying tower contains: tower body, lighting lamp, gas distributor, temperature control equipment, air inlet pipe, air outlet pipe and other components. The inside of the air inlet pipe needs to be equipped with a filter device; the atomized slurry is in the hot air Under the action of heating, the slurry is completely volatilized and dried to become the discharge port where the powder falls to the bottom. The gas is discharged from the exhaust pipe for a closed loop pipeline. The drying tower material: 304 stainless steel.
6. Product recovery system
The gas discharged from the bottom of the drying tower contains powdery steam, which is recovered by a cyclone separator.
7. Gas circulation system
The gas circulation is completed by a set of circulating fans. The drying medium is output from the circulating fan, flows through the electric heater, drying tower, cyclone separator or bag filter, and then discharged to form a gas circulation system.
Ceramic granulation high-speed centrifugal spray dryer parameters
Water evaporation capacity: 5L/H
Drying temperature: up to 220 degrees Celsius
Drying chamber diameter (mm): 1500 mm
Drying chamber cone angle: 60 degrees
Heater capacity: 18kW
Total power of the machine: 25kw
Land size: length * width * height approximately (2200mm*2200mm*2950mm)
Centrifugal atomizer: 24000rp speed adjustable, o-shaped granulation structure
Special volute structure for granulation, (QFN-RO-ZL-IN2017-V15)
Special cap partial pressure structure for granulation, (QFN-RO-ZL-DIP-V15)
Using a new turbine cyclone separator (QFN-RO-CYC2017)
Eliminate the factors that affect particle structure and morphology such as rapping and purge in the tower
