Product Introduction:
A spray dryer is a drying unit that uses atomizers to disperse the material into a mist, allowing it to come into full contact with hot air for instant drying upon contact, forming a powdered finished product. The spray dryer, through mechanical action, disperses the material to be dried into extremely fine, mist-like particles.(Increase water evaporation surface area to accelerate the drying process.)After contact with hot air, most of the moisture is removed instantly, drying the solid materials in the material into powder. The spray drying process is completed in the air, allowing the dried material to maintain a spherical shape similar to the liquid droplets, with good flowability, 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, significantly 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, air enters the hot air distributor at the top of the drying chamber. The hot air distributed evenly throughout the chamber flows in a spiral pattern. Simultaneously, the liquid material is delivered to the centrifugal spray nozzle mounted at the top of the chamber, where it is atomized into extremely fine droplets. This significantly increases the surface area of contact between the liquid material and the hot air, causing rapid evaporation of moisture and forming the dried product in a short period of time.
If the spray dryer is experiencing a serious issue with sticking to the walls during operation, the possible cause may be:
1Material intake is too great, cannot be fully evaporated.
2Insufficient drying chamber heating before the spray dryer's spray starts.
3When starting the spray, the feeding flow rate is too high; the added liquid is unstable.
For the various causes of the aforementioned issues, the following measures can be sequentially adopted:
1Reduce the incoming raw material volume moderately; increase the inlet and outlet temperatures of the hot air moderately.
2At the start of the spray, the flow rate should be low, gradually increasing until it reaches an appropriate level.
3Check for pipe blockages, adjust the solid content of the material, and ensure the fluidity of the slurry.
Product Specifications:
Project/Parameter | 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 drive type | Compressed Air Transmission | Mechanical Transmission | |||
RPM (revolutions per minute) | 25000 | 18000 | 18000 | 15000 | 8000-15000 |
Spray Disc Diameter (mm) | 50 | 120 | 120 | 150 | 180-240 |
Heat source | Electricity | Steam + Electric | Steam and electric, 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 based on the actual circumstances |
Dust Recovery (%) | ≥95 | ||||
Note:
The water evaporation rate is related to material characteristics, solid content, and the temperature of the hot air in and out. The data in the table is for reference only. Users can select the heating method based on local energy conditions and choose the dust collection method according to the material characteristics.
