Boiling Dryer
Drying Equipment
1. Product Overview
The fluidized bed dryer uses hot airflow to suspend wet materials in a fluidized (boiling) state, achieving rapid heat and mass transfer. It consists of the main fluidized bed, air filter, heater, fan, cyclone separator, bag filter, and control cabinet. Widely used in: granule drying in the pharmaceutical industry, grain drying in the food industry, and powder/granule drying in the chemical industry. Features: high heat transfer coefficient, fast drying speed, uniform heating, closed operation preventing cross-contamination.
2. Working Principle
Clean air is filtered and heated, then enters the fluidized bed from the bottom through the distribution holes in the bed plate; wet material is added to the bed and suspended in a fluidized state by the lifting airflow; the hot air fully contacts the material, and moisture evaporates rapidly; the dried powder is carried by the exhaust gas into the cyclone separator and bag filter for collection, while qualified granules are discharged from the outlet.
3. System Classification
By Operation Method:
Vertical Fluidized Bed Dryer: Single bed layer, batch feeding/discharging, compact structure / Pharma, food granules, and small/medium batch production
Horizontal Multi-chamber Fluidized Bed Dryer: Bed divided into independent chambers, material flows sequentially, uniform residence time / Large-scale continuous granule and powder production
Internally Heated Fluidized Bed Dryer: Built-in heat exchange tubes/plates in the bed, reducing air volume requirement / High humidity, heat-sensitive, or sticky materials
4. Detailed Technical Parameters
4.1 Common Materials
| Material | Applicable Components/Media | Remarks |
|---|---|---|
| 304 Stainless Steel | Bed body and air ducts contacting materials | GMP compliant, preferred for pharma and food |
| 316L Stainless Steel | Corrosive materials, high-purity materials | Extremely high corrosion resistance |
| Carbon Steel Q235B | Outer shell, frame, non-contact parts | Low cost, commonly used in the chemical industry |
4.2 Typical Specification Table
| Batch Feed (kg/batch) | Fluidized Bed Area (m²) | Fan Power | Steam Consumption (kg/h) | Inlet Air Temp (℃) |
|---|---|---|---|---|
| 30～100 | 0.3～0.8 | 3～7.5 | 50～150 | Room temp～120 |
| 100～300 | 0.8～2.0 | 7.5～18.5 | 150～400 | Room temp～120 |
| 300～1000 | 2.0～6.0 | 18.5～45 | 400～1200 | Room temp～120 |
4.3 Design Conditions & Performance
| Parameter | Specification |
|---|---|
| Inlet Air Temperature | Room temp～120℃ (pharma typically max 80℃) |
| Drying Time | 15～45 min/batch (depends on initial moisture) |
| Air Pressure | Bed pressure drop: 3000～6000Pa |
| Product Moisture | ≤0.5% (conventional granules) |
5. Electrical Parameters
| Region | Voltage | Frequency |
|---|---|---|
| China/Russia/Central Asia | 380V | 50Hz |
| Middle East/Southeast Asia/Africa | 400V / 415V | 50Hz |
| South Korea | 380V | 60Hz |
| Americas (if required) | 440V / 480V | 60Hz |
| Note: Induced draft fan, forced draft fan, and agitator motors must have specified voltage and frequency. |
6. Core Component Selection
| Component | Brand/Material | Features & Applications |
|---|---|---|
| Distribution Plate (Sieve) | Custom-made | 304/316L multi-layer perforated plate/wire mesh, uniform air distribution |
| Bag Filter | Custom matched | Top anti-static filter bags, bag-shaking cylinder for dust cleaning, >99% collection |
| Fan | GB standard/Custom | High-pressure centrifugal fan, air volume and pressure sized to the bed design |
| Control System | Siemens/Inovance | PLC + touch screen, auto control of air temp, pressure, drying time |
7. Typical Application Fields
Pharmaceutical Industry: Tablet granules, capsule filling granules drying
Food Industry: Instant granules, seasonings, grain drying
Chemical Industry: Resins, plastic pellets, chemical powder drying
Agrochemical Industry: Water dispersible granules (WDG) drying
8. Design Standards & Certifications
| Standard | Description |
|---|---|
| JB/T 20155-2012 | Fluidized bed dryers (Pharmaceutical machinery standard) |
| ISO 9001:2015 | Quality Management System |
| GMP | Good Manufacturing Practice |
| CE / EAC / GOST-R | Available upon request for international orders |
9. Custom Optional Configurations
| Option | Details |
|---|---|
| System Type | Open circuit system / Closed-loop circulation system (Nitrogen protection, solvent explosion-proof) |
| Dust Removal | Top bag shaking / Cyclone + Bag filter / Water scrubber |
| Heating Method | Steam / Electric / Thermal oil |
| Special Functions | CIP online cleaning / SIP online sterilization / Explosion-proof design |
10. Warranty Terms
| Equipment Status | Warranty Period | Warranty Scope |
|---|---|---|
| Brand New | 12 months | Bed structure, air distribution system, dust removal and fan systems |
| Refurbished | 6 months | Bed structure, air distribution system, dust removal and fan systems |
| Idle | 3 months | Main functional components |
11. Packaging & Delivery
| Item | Packaging Method |
|---|---|
| Bed Body / Air Ducts | Steel strap bundled nude or tarpaulin wrapped |
| Bags / Sieves / Valves | Fully enclosed wooden cases |
| Electrical / Instruments | Waterproof sealed packaging in wooden cases |
| Container shipping. On-site installation and commissioning guidance available. |
12. Information Required for Inquiry
12. Information Required for Inquiry Material name, form (granule/powder), initial/final moisture content; bulk density and particle size distribution; batch capacity or hourly output; solvent type (water/organic solvent — relevant to explosion-proof design); need for CIP/SIP; equipment status preference (new/refurbished/idle); delivery terms (FOB/CIF/DDP); destination port.