Overview:

  Centrifugal spray dryers, spray dryers, and spray drying towers are widely used processes in the liquid forming process and drying industry. It is especially suitable for producing powdery and granular solid products from suspoemulsion, solution, emulsion and pasty liquid raw materials. Therefore, when the particle size distribution, residual moisture content, bulk density and particle shape of the finished product meet the standard of ^, the spray dryer is a better drying process.

Features:

1. The spray drying speed is fast. After the material liquid is atomized, the surface area 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, especially suitable for heat-sensitive materials The dryness. To

  2. The product has good uniformity, fluidity and solubility. The higher the purity of the product, the better the quality. To

  3. The spray dryer production process is simplified, and the operation and control are convenient. For liquids with a moisture content of 40-60% (up to 90% for special materials), the liquid can be dried into powder products at one time. After drying, there is no need to pulverize and screen, which reduces the production process and improves the product purity. The product particle size, bulk density and water content can be adjusted by changing the operating conditions within a certain range, and the control and management are very convenient.

Working principle:

The spray dryer has an open cycle, parallel flow, and centrifugal atomization. The drying medium air is filtered by the primary and medium-efficiency air filters and is sucked by the blower according to the operating instructions, then heated by the heater and passed through the hot air distributor of the high-efficiency filter into the spray drying main tower. The liquid material passes through the peristaltic pump according to the operating instructions, enters the high-speed rotating centrifugal nozzle, and is dispersed into small droplets under the action of centrifugal force. In the spray drying main tower, the small droplets are in full contact with the hot air, and they are dried into products after heat exchange along their specific paths, and then separated by a cyclone separator, the solid materials are collected, and the gas medium is filtered and discharged . The entire spray system is easy to clean, has no dead ends, and meets GMP requirements.

The following three aspects in design and manufacturing are important points for attention

1. The contact of hot air flow and mist droplets: When a sufficient amount of hot air flow enters the spray drying chamber, the direction and angle of the hot air flow must be considered, whether it is cocurrent, countercurrent or mixed flow, to ensure sufficient contact with the mist droplets. Full heat exchange.

2. Atomization: The atomization system of the spray dryer must ensure uniform droplet size distribution, which is very important. Because in this way, the pass rate of product quality can be ensured.

3. Design of pipe angle and cone angle

Application scope:

Chemical products: polyaluminum chloride, disperse dyes, reactive dyes, organic catalysts, white carbon black, washing powder, zinc sulfate, silicon dioxide, sodium metasilicate, potassium fluoride, calcium carbonate, potassium sulfate, inorganic catalysts, various Kind of waste liquid and so on.

Food products: amino acids, vitamins, egg powder, bone meal, condiments, protein, milk powder, pig blood powder, soy sauce powder, coffee, tea, glucose, potassium sorbate, pectin, flavors and spices, vegetable juice, yeast, starch Wait

  Ceramics Porcelain: alumina, zirconia, magnesia, titania, magnesia titania, pottery clay, porcelain clay, various ferrites and metal oxides, etc.