The spray drier is widely used in the liquid shaping technology and in the drying industry. Particularly it is suitable for producing powder, granule or block solid product from solution, emulsion, suspending liquid and pumped paste liquid.

The working of spray dryer is as follows: Fresh air after filtering and heating, enters into the air distributor at the top of dryer.Then the hot air enters into the drying chamber. The liquid of raw material is pumped in through diaphragm pump, be atomized into tiny droplets. Through the very short time of contacting the hot air, the materials can be dried into the finished products.The wasted air and fine powder will be collected through collector at the bottom of cyclone.The tower body also equipped with observation door, sight glass, lamp-house and so on.

During spray drying of feed liquid, tremendous energy and mass transfer occurs within extremely short time. Concentrated liquid drops leave the atomizer at the speed of 100-200m/s. Most moisture is removed from the retarding travel of liquid drops; and during this travel, fog drops lose initial velocity, and are carried away by dry air. Small liquid drops have 90% moisture evaporated at 0.5m away from the atomizer; while about 1.5m travel is required for big liquid drops.
In the full process of drying, the temperature of liquid drops is between surrounding air temperature and wet bulb temperature; and after atomization, the temperature of liquid drops will rise to be slightly higher than wet bulb temperature immediately. The evaporation of moisture from surface of liquid drops starts from constant-speed drying stage. At this stage, liquid drops are still fluid, and moisture in liquid drops is easy to move from inside to surface of liquid drops, maintaining surface moistened.
At the later drying stage, the moisture content reaches a critical value, liquid drops lose the characteristic of fluid and become wet solid, and encrustation forms on the surface. In such case, steam is produced because the received heat is bigger than the momentum of moisture movement, so the internal pressure further rises and makes the shell break. This stage is featured by sudden appearance of humidity gradient in radial direction of liquid drops. Moisture passes through the inside of particles and diffuses outwards, and drying rate begins to drop. Therefore, this stage is called as retarding stage.

♦ Quick drying speed. In the hot air stream, 95% to 98% of moisture can be evaporated immediately.
♦ It is especially suitable for drying thermal sensitive material.
♦ The product made by the machine has good uniformity, fluidity and high quality.
♦ The productive process is simple and the operation control is very convenient.
♦ For liquid containing 40-60% of damp (for special material, may be 90%), it can be dried to powder product through drying one time. After dried, it is not necessary to crush and sieve. So it reduces productive procedure and raises the purity of product.

1. Chemical Industry:
white carbon,amino acid,catalyst,dyestuff intermediate,sodium fluoride,compund fertilizer,etc.
2. Plastics and resin:
AB,ABS emulsion, uric acid resin,phenolic aldehyde resin,urea-formaldehyde resin,polythene,etc.
3. Food Industry:
oats,chicken juice,coffee,instant dissoluble tea,protein,soybean,peanut protein,hydrolysate,etc.
4. Sugar:
corn syrup,corn starch,glucose,pectin,malt sugar,sorbic acid potassium,etc.
5. Ceramic:
aluminium oxide,ceramic tile material,magnesium oxide,talcum,etc.

1. Design and production
We solicit buyers opinions widely at the design and production stage of equipment; especially at the stage of plan and elevation arrangement, we give full consideration to buyers’ site conditions and public engineering conditions, and pay concurrent attention to the optimum combination when assuring the quality of equipment.
2. Installation and commissioning
After the equipment is delivered to buyers factory, we will dispatch full-time technical personnel to instruct buyers’ installation and to take charge of commissioning until normal use of the equipment.
3. Training
Before buyers use our equipment normally, our commissioning personnel will organize buyers’ relevant personnel to accept training, which covers the maintenance and care of equipment, timely repair of common faults, and procedures for operation of equipment.
4. Warranty
We provide one-year warranty for our equipment. For damage of equipment arising from non-artificial factors within the warranty period, we will provide repair service for free; and for damage of equipment arising from artificial factors, we will provide repair service in time and collect corresponding cost.
5. Maintenance and period
For damage of equipment after expiration of warranty period, we will provide on-site repair service within 24h/48h for enterprises inside/outside the province after receiving buyers’ notification. The service provided after expiration of warranty period is fee-based, and flat cost will be collected each time when the service is provided.