Product Introduction:
A spray dryer is a drying device that uses atomizers to disperse the material into a mist, allowing it to come into full contact with hot air for instant drying, resulting in a powdered finished product. Through mechanical action, the spray dryer disperses the material to be dried into very fine, mist-like particles.(Increase the surface area for water evaporation to accelerate the drying process.)After contact with hot air, most of the moisture is removed instantly, drying the solid substances in the material into powder. The spray drying process is completed in the air, where the dried material retains a spherical shape similar to droplets, exhibiting good fluidity, dispersibility, and solubility.
Spray dryers are commonly used to process wet content.40%—90%The solution can be dried into a powdered product in a single dryer, greatly reducing the production process and simplifying the workflow. The particle size, bulk density, and moisture content of the product can be adjusted within a certain range by changing the operating conditions, making operation and control quite convenient.
The spray dryer operates as follows: After passing through a filter and a heating unit, the air enters the hot air distributor at the top of the drying chamber. The hot air distributed evenly into the chamber spirals, while the liquid material is delivered to the centrifugal spray nozzle mounted at the top of the chamber. The liquid is atomized into extremely fine droplets, greatly increasing the surface area of contact between the liquid and hot air. This leads to rapid evaporation of moisture, resulting in the formation of dried product in a short amount of time.
If the spray dryer is experiencing a severe issue with sticking to the walls during operation, the possible cause may be:
1The incoming material volume is too large, leading to insufficient evaporation.
2Insufficient preheating of the drying chamber before the spray dryer starts spraying.
3At the start of the spraying, the feed rate adjustment is too high; the added liquid is unstable.
In response to the various causes of the aforementioned issues, the following measures can be sequentially implemented:
1Reduce raw material intake moderately; increase the import and export temperatures of the hot air moderately.
2At the start of the spraying, begin with a low flow rate, gradually increase it, and adjust to an appropriate level.
3Check for pipe blockages, adjust the solid content of the material, and ensure the fluidity of the slurry.
Product Specifications:
Project/Parameters | 5 | 25 | 50 | 150 | 200-2000 |
Inlet Temperature (°C) | 140-350 Self-Control | ||||
Export Temperature (°C) | 80-90 | ||||
Evaporation Rate | 5 | 25 | 50 | 150 | 200-2000 |
Centrifugal atomizer head drive type | Compressed Air Drive | Mechanical Transmission | |||
RPM (revolutions per minute) | 25000 | 18000 | 18000 | 15000 | 8000-15000 |
Spray Plate Diameter (mm) | 50 | 120 | 120 | 150 | 180-240 |
Heat Source | Electricity | Steam + Electric | Steam and electricity, fuel oil, gas, hot blast air | ||
Electric Heating Power (kW) | 9 | 36 | 72 | 99 | |
Dimensions (m) | 1.8×0.93×2.2 | 3×2.7×4.26 | 3.5×3.5×4.8 | 5.5×4.7 | Determine according to the actual circumstances |
Dry Powder Recovery (%) | ≥95 | ||||
Note:
The amount of water vaporization is related to material characteristics, solid content, and the temperature of the hot air at the inlet and outlet. The data in the table is for reference only. Users should select the heating method based on local energy conditions and choose the dust collection method according to the material characteristics.
