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PNEUMATIC POWDER CONVEYORS
A pneumatic powder conveyor is a system designed to transport powdered materials through pipelines using compressed air or gas. It’s commonly used in industries like pharmaceutical, chemical, food, and cement for efficient, dust-free, and hygienic powder transfer.
- Pneumatic Powder Conveyor
- Portable Vacuumised Powder Conveyor
- Powder Transfer System
- Reactor Loading system
- Tablet Press Loading system
- Capsule Loading System
- Direct charging vacuum rated Blenders& Mixers
- Grain Conveying System
- Bag Dumping Station
- Jumbo Bag Loading system
- Jumbo Bag Unloading System
- Weighing Batching system
- Bin Activator & Discharger
- Other Applications
Working Principle
The system moves powder using one of the following mechanisms:
1. Vacuum Transfer (Negative Pressure)
Powder is sucked through a pipeline by creating a vacuum.
Suitable for short to medium distances and hygienic applications like pharma.
2. Pressure Transfer (Positive Pressure)
Powder is pushed using compressed air or gas.
Suitable for long distances or large quantities.
Key Components
Blower/Compressor: Generates the air movement.
Feed Hopper: Stores the powder before conveying.
Rotary Valve / Feed Device: Controls the material flow into the pipeline.
Conveying Pipeline: Transports the powder.
Receiver Hopper or Cyclone Separator: Collects the powder at the destination.
Filters & Pulse Jet System: Ensure clean air discharge and dust-free operation.
📊 Types of Pneumatic Conveying Systems
| Type | Air Velocity | Solids-to-Air Ratio | Best For |
|---|---|---|---|
| Dilute Phase | High (15–30 m/s) | Low | Fine powders, non-abrasive |
| Dense Phase | Low (3–8 m/s) | High | Fragile, abrasive powders |
✅ Advantages
Dust-free operation
Fully enclosed, hygienic
Flexible pipeline layout
Low maintenance
Gentle handling (dense phase)
📉 Limitations
Higher energy consumption (especially in dilute phase)
Complex system design
Initial cost can be high
🏭 Applications
Pharmaceuticals: APIs, excipients, talc, etc.
Food Industry: Flour, sugar, spices, cocoa powder
Chemicals: PVC, resins, silica, pigments
Cement & Minerals: Fly ash, lime powder, cement
⚖️ Pneumatic vs Mechanical Conveyors – Detailed Comparison Table
| Parameter | Pneumatic Conveyors | Mechanical Conveyors |
|---|---|---|
| Material Transport Method | Air or gas stream | Physical contact (belt, screw, chain, etc.) |
| Material Types | Fine powders, granules, pellets | All types: powder, granules, lumps, bulk solids |
| Distance Handling | Long distances (up to 500+ m) vertically or horizontally | Short to medium distances (typically up to 50 m) |
| Flexibility in Routing | Highly flexible; allows vertical, horizontal, and curved routing | Limited flexibility; requires more space and mechanical support |
| Footprint Requirement | Compact, pipeline-based | Bulky, requires more floor space |
| Dust Control | Excellent (fully enclosed, airtight system) | Moderate; may need dust-tight enclosures |
| Cleanability | High (CIP possible in pharma-grade systems) | Lower; may require manual cleaning |
| Maintenance Requirement | Lower mechanical wear; filters need cleaning | Higher wear and tear on moving parts |
| Energy Consumption | Higher due to blowers/compressors | Typically lower |
| Product Degradation Risk | Lower in dense phase; can be higher in dilute phase (due to velocity) | Depends on conveyor type (gentle in belts, higher in screws/chains) |
| Installation Cost | Moderate to high (blowers, filters, valves) | Lower upfront cost in basic systems |
| Operating Cost | Higher energy and filter maintenance | Lower energy, but higher mechanical maintenance |
| Automation Integration | Easy to automate and integrate into closed-loop systems | More complex integration |
| Safety (Explosion/Dust) | Safer for combustible powders (if inert gas or ATEX-rated used) | Needs proper sealing and dust management |
| Typical Industries | Pharma, chemical, food, plastic, cement | Food, mining, cement, agriculture, recycling |
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