Spray Dryer

Working Principle:
Liquid material is atomized through a special pressure nozzle with a high-pressure pump. Hot air enters the dryer after being adjusted by an air distributor. The material and hot air is mixed in the dryer, rapidly carries on heat and mass transfer. Powder or granular products are produced in a very short time. Products with larger particles size are discharged form the bottom of the dryer, smaller particles enter the cyclone with hot air. The exhaust gas is discharged into the air after dust removal in a scrubber. The dryers can be divided into high, middle and low pressure spray dryers according to different pressures of atomization, while taking into account different flow fields, they are divided into co-current, fountain mode and counter-current spray dryers. 

1. High operational flexibility on non-adhesive or low-adhesive liquid materials.
2. Simple structure of the spray nozzle, easily used and maintained.
3. Less power consumption, low cost.
4. The hollow spherical product with big particles, good mobility and solubility.
5. Can be used to spray-cooling granulation process, such as paraffin, grease particles, special resins, etc.

Applicable Materials:
Chemical industry: white carbon black, concrete admixture, barium sulfate, chromium sulfate basic, alumina, titanium oxide, kaolin, ferrite, talc, carbide, fertilizer, dyes, detergents, ACR additives, latex, water purifying agents, resins, plastics, cryolite, etc.

Food industry: dextrin, maltose, protein powder, egg yolk powder, oligosaccharides, granular oils, instant coffee, starch, spices, fruits and vegetables granules. 

Pharmaceutical industry: Chinese and Western medicine powder, antibiotics, biochemical products, vitamins, pesticide powders, hydrolyzed proteins, enzymes, single-cell proteins, etc.

Building materials industry: ceramic billets, glazes, ultrafine powders, etc.

Environmental protection: flue gas desulfurization, papermaking black liquor and pharmaceutical waste treatment. 



SpecificationDiameter(mm)Height(m)Size(m×m)Atomization wayInlet Air Temperature(℃)Others
GPY25Ф180075×4.5Pressure nozzle atomization120-700Heat source: electric heating, coal burning, fuel oil, gas, hot air stove and flue gas furnace.



The spray-dried raw material liquid may be solution, emulsion, suspension, melt or paste liquid. The dried product may be in form of powder, granule, hollow sphere or cumularspharolith as needed. The atomizer that disperses the feed liquid into droplets is the key component of spray dryer. A pressure atomizer is used to obtain high pressure by a high-pressure pump. When the high-pressure liquid passes through the nozzle, the pressure energy is converted into kinetic energy and dispersed as droplets at a high-speed discharge. The hot air and atomized droplets undergo heat transfer and mass transfer processes, and the droplets are dehydrated and dried into powder, granule, hollow sphere or cumularspharolith. Due to the fast heat transfer and mass transfer in the tower, it is especially suitable for drying of heat sensitive materials and has better heat transfer efficiency.