Anhydrous Sodium Sulfate Dryer: Advanced Features and Optimized Performance

Learn the advanced features and optimized performance of the special dryer for anhydrous sodium sulfate. Ensure efficient drying and product quality with this cutting-edge technology.
Fluidized bed dryer for sale

Introduction:

The special dryer for anhydrous sodium sulfate is a pivotal industrial device used to enhance the drying process of granular materials. Utilizing the principle of a vibrating fluidized bed, this dryer addresses common issues found in ordinary fluidized bed dryers, such as particle agglomeration and uneven moisture content. This article delves into the working principle, application scope, and distinctive characteristics of the sodium sulfate dryer, highlighting its benefits in various industries including food, chemical, and pharmaceuticals.

Working Principle:

The vibrating fluidized bed dryer operates by applying mechanical vibration to the fluidized bed. This adjustment helps to reduce particle back-mixing, achieving an ideal plug flow during continuous operation. The material is fed into the dryer, where it moves horizontally along the bed due to the vibration. Hot air passes through a mesh plate, facilitating heat exchange with the wet material. The moist air is then removed through a cyclone separator, and the dried material is discharged. 

Application Scope:

This series of dryers is designed for drying various loose powders and granular materials, making it suitable for industries such as:

  • Food: Drying of distiller’s grains, monosodium glutamate, sugar, and seeds.
  • Chemical: Drying plastic resins, boric acid, ammonium sulfate, and benzene.
  • Pharmaceutical: Drying tableting granules and traditional Chinese medicine granules.
  • Building Materials: Drying slag and other similar materials.

Additionally, it can be used for cooling and humidifying materials and is ideal for food and beverage granules, grain seed processing, corn germ drying, and animal feed.

Design conditions data table

Item Specification
Raw material name
Anhydrous sodium sulfate
water evaporation
120-160kg H2O/h
Initial moisture content of material
6-8%
Final moisture after drying
<0.5%
Throughput
2000kg/h
Feed flow
W=2000kg/h
ambient temperature
t=25℃
Feed temperature
θ=25℃
Inlet air temperature
t=120℃
Outlet air temperature
t=70℃
Dry area:
5.625 m2
Cooling area:
1.125 m2

Process flow design of the drying system

Item Specification
Drying system form
open system
drying medium
Air
Operating temperature
Inlet air temperature is 120℃, exhaust air temperature is 70℃
heat source
Steam heat exchanger (steam pressure guaranteed 2-3 kg)
Receiving method
Material collection at the end of fluidized bed
Dust removal method
Bag house filter
Control requirements
button control

Design conditions data table

Characteristics of the Dryer:

  1. Energy Efficiency: The application of vibration reduces the minimum fluidizing gas velocity, significantly lowering air requirements and dust entrainment, leading to reduced equipment costs and improved energy savings.
  2. Adjustable Residence Time: By adjusting the vibration motor’s amplitude, the residence time of materials in the dryer can be easily modified, accommodating various material sizes and shapes.
  3. Improved Material Dispersion: Vibration aids in dispersing materials, preventing agglomeration, and ensuring smooth fluidization and drying.
  4. Gentle on Materials: Lower air flow velocity minimizes damage to fragile materials, making it suitable for irregular particle sizes without compromising drying efficiency.
  5. Even Heating and High Drying Intensity: Uniform heating and efficient heat exchange result in high drying intensity and approximately 30% energy savings compared to conventional dryers.
  6. Vibration Motor: The dryer is driven by a vibration motor, ensuring smooth operation, easy maintenance, low noise, and long life.
  7. Enhanced Mass and Heat Transfer: The high dispersion state of materials enhances mass and heat transfer, boosting production efficiency.
  8. Wide Adaptability: The machine adapts to different materials’ specific gravity, particle size, and moisture content, with adjustable material layer thickness, movement speed, and vibration amplitude.

Drying system equipment list:

  1. Air Filter: Material: Carbon steel/non-woven fabric Purification Level: G4 Features: Primary purification, air regulator, shock absorber, bracket Power: 5.5KW Quantity: 1 set
  2. Hot Blower (Model: 4-72-4A): Material: Carbon steel Motor: Wannan Motor Features: Air regulator, shock absorber, bracket Power: 11KW Quantity: 1 set
  3. Hot Blower (Model: 4-72-5A): Material: Carbon steel Motor: Wannan Motor Features: Air regulator, shock absorber, bracket Power: 3KW Quantity: 1 set
  4. Cold Blower (Model: 4-72-3.6A): Material: Carbon steel Motor: Wannan Motor Features: Carbon steel pipe with aluminum fin wrap, high efficiency, energy-saving U-shaped pipe
  5. Steam Heat Exchanger 1: Surface Area: 150㎡ Material: Carbon steel pipe with aluminum fin wrap Features: High efficiency, energy-saving U-shaped pipe Quantity: 1 set
  6. Steam Heat Exchanger 2: Surface Area: 300㎡ Quantity: 1 set
  7. Blower Duct: Material: Carbon steel Quantity: 1 set

Fluidized Bed Drying System:

  1. Insulation: Thickness: 50mm
  2. Lower Box: Model: ZLG0.75X9.0 Material: Carbon steel with reinforced inner support steel pipe Quantity: 1 set Thickness: 8mm Features: Includes 2 access doors with reinforcement.
  3. Upper Box: Model: ZLG0.75X9.0 Material: Stainless steel 304 Quantity: 1 set Thickness: 3mm Features: 1 quick opening access door, punching board with the first 0.5 meters being duck-stencil, and tongue hole (straight and oblique round) at the back Hole Diameter: φ2mm.
  4. Shock Absorption Components: Model: ZLG0.75X9.0 Features: Special springs for fluidized bed drying Quantity: 1 set Vibration Motors: Model: ZLG0.75X9.0 Power: 3.0KW x 2 Quantity: 2 units Motor: Wannan Motor Soft Connection: Model: ZLG0.75X9.0 Material: Non-woven fabric Length: 4.5 meters Quantity: 1 set
  5. Feeding Auger: Model: U-shaped Size: 500*600mm Material: Stainless steel components Processing Capacity: 2 tons/hour Quantity: 1 set
  6. Vibrating Feeder: Model: ZLG0.75X9.0 Material: Stainless steel components Quantity: 1 set 
  7. Dust Removal System: Connecting Pipes: Diameter: φ587mm Thickness: 2mm Material: Stainless steel 304 Quantity: 1 set Power: 0.75KW Turn-off Fan: Capacity: 6 liters Material: Stainless steel 304 components Motor: Wannan Motor Filter Area: 151㎡ Cage Bone: Carbon steel sprayed with silicone Quantity: 1 set
  8. Bag Dust Collector: Model: MC160-2500 Air Consumption: 1.2m³/min Pressure: 6 kg Material: Stainless steel 304 Features: Includes shock-absorbing pads and brackets Power: 30KW Motor: Wannan Motor Quantity: 1 set Induced Draft Fan: Model: 9-26-11.2D Material: Carbon steel Features: Silencing air outlet duct, frequency conversion Quantity: 1 set

Optimization for Anhydrous Sodium Sulfate:

  1. Stable Product Quality: The vibration motor features variable frequency speed regulation to control the product’s residence time, ensuring consistent final moisture content. The air supply and induced draft fans adjust bed pressure, while an additional cooling section ensures product quality stability. 
  2. No Material Accumulation: Constructed with stainless steel 304, the dryer prevents material contamination and extends equipment life. The polished contact surfaces eliminate material accumulation and blockages. 
  3. High Dust Recovery Rate: The dust removal system combines a high-efficiency cyclone dust collector and a secondary bag dust collector, providing high dust collection efficiency with minimal pressure drop. 
  4. Convenient Control and Stable Performance: The dryer features advanced automatic control, with temperature and pressure digital displays, and frequency conversion to adjust the vibration motor speed.

Conclusion:

The special dryer for anhydrous sodium sulfate offers advanced features and optimized performance for drying granular materials. Its design ensures stable product quality, efficient drying, and significant energy savings. By following these procedures, industries can enhance production efficiency, maintain product integrity, and reduce operational costs.