Description of Spray Dryer:
Centrifugal Spray Dryer is widely used for making liquid to powder. It is suitable for producing powder products from solution, emusion, soliquoid, and pumpable paste materials. So when the size, final moisture, bulk density and shape of patrticles must meet the accurate standard, centrifugal spray drying is an ideal drying process.
The solution, emulsion, suspension liquid or slurry are sprayed into fine beads in the hot air, going down from the top of the drying chamber to the bottom, the water will be evaporated to and the product becomes powder or granular product.
Induce hot air from the top of drying tower, at the same time, pump the material liquid to the top of the tower by screw pump or peristaltic pump, the feeding solution becomes into fine beads or small droplets through the atomizer. When the droplets meet the high temperature hot air, the water will be evaporated immediately, and the material liquid is dried into dry product in a very short time, the product is discharged from the bottom of the drying tower, or from the cyclone (depend on the configuration). When the hot air contacts with the droplets, the temperature declines significantly, and the humidity increases greatly, and then will be exhausted by exhaust fan. The fine powder in the air will be collected through different separating devices
Features of Spray dryer:
1. Drying speed is fast. Material is atomized and superficial area is increased greatly. When contacting with the hot air, 95%~98% moisture is evaporated instantly. Drying time is only several seconds. So it is very suitable for drying thermal sensitive materials.
2. The output product has good homogeneity, fluidity and solubility. Liquid materials can be dried to powder directly, and after drying there is no need to crush or sieve the product. The moisture content and particle size is uniform.
3. Control system is human-machine interface type. Production process is simple and easy to operate. The rotary speed of atomizer is regulated by inverter.
4. The equipment is made of SUS304 or SUS316L stainless steel, it confirms to the requirements of GMP.
5. The heating source can be steam, thermal oil, gas, oil, electricity, coal, etc.
Application of spray dryer:
New energy industry: Lithium Iron Phosphate, Lithium manganese iron phosphate, Graphene and so on.
Pharmaceutical: Chinese medicine extract, chemical medicine, Vitamin, etc.
Food: Plant extract, yeast, egg, collagen protein, milk, coconut cream, fruit juice, coffee, non-dairy
cream, blood, flavours, vitamin, maltodextrin, etc
Chemical: Washing powder, Alumina, ceramic materials, Alumina polychlorid, disperse dyes,
reactive dyes, Organic catalyzer, zinc sulfate, etc.
Ceramic: Aluminum oxide, ceramic tile material, magnesium oxide, talc, etc.
Parameters of spray dryer:
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| | Electricity, steam, thermal oil, gas, oil, coal, biomass, etc |
Product collecting system | |
| | Bag filter or wet scrubber |
| | Peristaltic pump or screw pump |
| | Centrifugal atomizer or pressure nozzle |
| | Touch screen & PLC/ Button type |
| | SUS304/ SUS316L/ Q235/ 2205 |
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