Pneumatic conveying of bulk materials has many advantages when compared to other methods of conveying. These advantages include:
- Energy savings
- High reliability
- Routing flexibility
- Low maintenance cost
- Better process control
- Improved safety
- Lower operating cost
- Ability to handle toxic materials
- Better long distance handling
The two most distinct Categories of pneumatic conveying can be described as Following.
Lean Phase Pneumatic Conveying System
Material can be conveyed in dilute phase through suspension in pipe line, regardless of the particle size, shape or density. It is often referred to as suspension flow because the particles are held in suspension in the air as they are blown or sucked through
Dense Phase Pneumatic Conveying System
In dense phase conveying two modes of flow are recognized. One is moving bed flow, in which the material is conveyed in dunes on the bottom of the pipeline, or as a pulsatile moving bed, when viewed through a sight glass in a horizontal pipeline. The other mode is slug or plug type flow, in which the material is conveyed as the full bore plugs separated by air gaps. Dense phase conveying is often referred to as non-suspension flow.