Product introduction:
High speed centrifugal spray dryer is widely used in liquid forming process and drying industry. It is suitable for producing powder and granular solid products from suspended lotion, solution, lotion and paste liquid raw materials. Therefore, spray dryer is a good drying process when the particle size distribution, residual moisture content, bulk density and particle shape of the finished product meet accurate standards.

characteristic:
1. Spray drying speed is fast. After atomization, the surface area of the liquid material is greatly increased. In the process of contact with hot air, 95% - 98% of the water can be evaporated instantly, and the drying time is only a few seconds. It is especially suitable for drying heat sensitive materials.
2. The product has good uniformity, fluidity and solubility. The higher the purity of the product, the better the quality.
3. The production process of spray dryer is simplified, and the operation and control are convenient. The liquid with a moisture content of 40-60% (up to 90% for special materials) can be dried into powder products at one time, without crushing and screening after drying, reducing production processes and improving product purity. The particle size, bulk density and moisture of the product can be adjusted by changing the operating conditions within a certain range, which is very convenient for control and management.

working principle:
The spray dryer is open circulation, parallel flow and centrifugal atomization. The drying medium air is filtered by the primary and medium efficiency air filters, and then absorbed by the blower according to the operation instructions, heated by the heater, and enters the spray drying main tower through the hot air distributor of the high efficiency filter. The liquid material passes through the peristaltic pump according to the operation instructions, enters the high-speed rotating centrifugal nozzle, and is dispersed into small droplets under the centrifugal force. In the main spray drying tower, small droplets are in full contact with the hot air, and after heat exchange along their specific path, they are dried into products, which are then separated through the cyclone separator. Solid materials are collected, and the gas medium is filtered and discharged. The whole set of spray system is easy to clean and free of dead corners, meeting GMP requirements.

Scope of application:
Chemical products: polyaluminum chloride, disperse dyes, reactive dyes, organic catalysts, white carbon black, laundry powder, zinc sulfate, silicon dioxide, sodium metasilicate, potassium fluoride, calcium carbonate, potassium sulfate, inorganic catalysts, various waste liquids, etc.
Food: amino acids, vitamins, egg powder, bone meal, condiments, protein, milk powder, pig blood powder, soy sauce powder, coffee, tea, glucose, potassium sorbate, pectin, essence, spices, vegetable juice, yeast, starch, etc
Ceramics: alumina, zirconia, magnesium oxide, titanium oxide, magnesium titanate, clay, porcelain clay, various ferrites and metal oxides, etc

main points:
1. Contact between hot air flow and fog drops: when enough hot air flow enters the spray drying chamber, the direction and angle of hot air flow must be considered, whether it is concurrent flow, countercurrent flow or mixed flow, to ensure full contact with fog drops, so as to carry out full heat exchange.
2. Atomization: The atomization system of the spray dryer must ensure the uniform distribution of the droplet size, which is crucial. Only in this way can the qualified rate of product quality be ensured.
3. Design of pipe angle and cone angle: We have obtained some experience data from the production of nearly 1000 spray drying units, which can be shared with you.