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HOME > Plant Facilities > Pneumatic Conveying System |
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| Pneumatic Conveying System ? |
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Silo is a large-scaled container that is installed to store powder and particles in bulk while a container for short time (hours or a day) containing is called the bin. |
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The relation between diameter and height of a silo is defined as H=2.5D in general, when H stands for the straight height of a silo.
The silo is divided into the storage silo, blending silo, partition silo and the hopper for buffering flow velocity according to uses and purposes. |
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| Types and Features |
| Conveying Type |
Conveying Status |
Applications |
Operational Conditions |
Conveying Devices |
| Conveying Pressure
(kg/㎠) |
Pneumatic Velocity
(m/sec) |
Mixture Ratio |
| Low Pressure Feed Type |
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General Industries (Timber, Chip, Pellet) Chemical Industry (N2 , CO2) |
0.1~0.2 |
15~20 |
0.1~10 |
Turbo
Roots |
| Suction Type |
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Conveying Coal: Vessel-> Unloading Yard Conveying Poisonous Material |
0.2~0.5 |
15~30 |
0.1~15 |
Turbo
Roots |
| High Pressure Feed Type |
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High Pressure Container Long Distance Conveying |
0.4~4.0 |
15~30 |
7~50 |
Roots
Blower
Screw
Comn'r |
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| ※ 그 외 저속고농도 수송방식은 고농도 고압 압송방식과 고농도 Plug Flow 방식이 있음 |
| Merits / Demerits |
| Merits |
Demerits |
- Relatively Flexible Conveying Passage (Small Space)
- Sanitary Treatment thanks to SEALED Conveying
- Not Many Operational Parts -> Easy Maintenance, Operation and Automation
- Large Conveying Capacity to Unit Area of Device
- Low Investment Cost
- Small Noise and No Residue |
- Large Power Consumption compared to other conveying methods- High Conveying Velocity -> Abrasion of Pipes and Crush of Particles (Preventable through Low Speed & High Density Conveying)- Restriction on Conveyable Material
* Particles of 30mm or Larger
* Moisture Containing Materials
* Adhesive Materials |
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| Considerations for Design |
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Specifications for Design: Kinds and Physical Properties of Materials to be Conveyed (B.D, T.D, Size, Viscosity, Corrosiveness, Moisture Content), Adaptability of Pneumatic Conveying and Conveying Method, Conveying Amount and Conveying Distance, Conveying Pressure |
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Airlock Type (Rotary V/V), Separation Method for Conveyed Materials (Bag Filter, Cyclone, Vent Filter), Size of Site, Maintenance Space, Piping and Other Facilities, Future Plan for Further Facilities |
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| Other Conveying Methods |
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Belt Conveyor, Chain Conveyor, Bucket Elevator, Roller Conveyor, Screw Conveyor, Vibrating Conveyor |
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