Rapid liquid-to-powder conversion for pumpable solutions, emulsions, suspensions and pastes.
The spray drying is the widest used technology in the liquid shaping technology and in the drying industry.It is most suitable for producing powder, particle or block solid products from materials of solution,emulsion, soliquoid and pumpable paste states. Therefore, when the particle size and distribution of the final products, their residual water contents, the stocking density and the particle shape meet the precision standards, the spray drying is one of the most desired technologies.
Air is heated via an air filter and heater, then flows into the hot‑air distributor at the top of the drying chamber, entering the chamber in a spiral pattern.
Meanwhile, raw‑material liquid is pumped through a filter to the centrifugal atomizer mounted on the top of the drying chamber, where it is atomized into fine droplets. The feed liquid makes direct co‑current contact with hot air; moisture evaporates quickly, and the material is dried into finished product within a very short period.
● Rapid Drying Speed: Once atomized, the surface area of the liquid feed increases drastically. Within the hot airflow, 95%–98% of moisture evaporates almost instantaneously, completing the drying cycle in just a few seconds.
● Ideal for Heat-Sensitive Feeds: Highly suitable for thermosensitive materials, delivering end products with excellent uniformity, flowability, solubility, high purity, and consistent quality.
● Simplified Process & Easy Control: Liquids with 40%–60% moisture (up to 90% for specific materials) are directly converted into powders or granules in a single pass. Eliminating the need for post-drying crushing and screening reduces processing steps and prevents contamination. Particle size, bulk density, and residual moisture are easily regulated within specified parameters.
1. Atomization: Atomizing system must insure the fogdrops distributing uniformly. the hot airflow, 95%–98% of moisture evaporates almost instantaneously, completing the drying cycle in just a few seconds.
2. Contact of hot airflow and fogdrops: When enough hot air enter into drying tower, the flow way and angle have to be considered, no matter co-current flow, adverse current or mixed flow. must insure the sufficient heat exchange.it is crucial.
3. The angle design of pipelines and cone: It is very important to select the suitable angle, here we would like to share our experience from production of thousands of this equipments.
Food & Ingredients
Amino acids, vitamins, egg powder, bone meal, seasonings, proteins, milk powder, pig blood powder, soy sauce powder, coffee, tea powder, glucose, potassium sorbate, pectin, flavors & fragrances, vegetable juices, yeast, starches, etc.
Ceramics
Alumina, zirconia, magnesium oxide, titanium dioxide, magnesium titanate, pottery clay, china clay (kaolin), ferrites, metal oxides, etc.
Chemical Products
Polymerized aluminum chloride (PAC), disperse dyes, reactive dyes, organic catalysts, white carbon black (silica), detergent powder, zinc sulfate, sodium metasilicate, potassium fluoride, calcium carbonate, tripotassium phosphate, inorganic catalysts, industrial wastewater/effluents, etc.
| Item \ Type | 5 | 25 | 50 | 100 | 150 | 200 | 500 | 800 | 1000 | 2000 | 3000 | 4500 | 6500 |
| Inlet temperature (℃) | 140-350 Automatically controlled | ||||||||||||
| Outlet temperature (℃) | 80-90 | ||||||||||||
| Way of atomizing | High speed centrifugal atomizer (Mechanical drive or stepless frequency regulation available) | ||||||||||||
| Water evaporation capacity (kg/h) | 5 | 25 | 50 | 100 | 150 | 200 | 500 | 800 | 1000 | 2000 | 3000 | 4500 | 6500 |
| Speed of atomizer (rpm) | 35000 | 20500 | 17600 | 15500 | 11570 | 10983 | |||||||
| Diameter of atomizing tray (mm) | 50 | 108 | 120 | 130 | 150 | 190 | 210 | 240 | |||||
| Max Electric heating power (kW) | 15 | 36 | 63 | 81 | 99 | Equipped with other heat sources | |||||||
| Dried powder recovery rate (%) | Around 95 | ||||||||||||
| Length of covered area (m) | 1.9 | 4 | 4.5 | 5.2 | 7 | 7.5 | 12.5 | 13.5 | 14.5 | Decided in accordance with the flow chart, condition of field and requirements of customers | |||
| Width of covered area (m) | 1.1 | 2.7 | 2.8 | 3.5 | 5.5 | 6 | 8 | 12 | 14 | ||||
| Height of tower body (m) | 2.2 | 4.5 | 5.5 | 6.7 | 7.2 | 8 | 10 | 11 | 15 | ||||
| Hoisting height of nozzle (m) | -- | 2.5 | 2.5 | 3.2 | 3.2 | 3.2 | 3.2 | 3.2 | 3.2 | ||||
Notes: The evaporated amount of moisture is concerned with characteristics of raw material, solid content and temperature of hot air inlet and outlet. Users can select heating in accordance with the conditions of local energy source and the way of dust removing in accordance with the characteristics of raw material.
