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High velocity, low-pressure system conveys the product in suspension of the gas stream. Pressure or Vacuum. Dilute phase pneumatic conveying is the most common pneumatic conveying system.
A typical system will consist of a positive displacement blower package and a rotary airlock or venturi eductor. The airlock or eductor meters product into the air stream. The product is kept in suspension and conveyed with a much higher air to material ratio.
Vacuum systems work in a similar fashion although a filter receiver is generally required at the destination. Vacuum is preferred when “zero tolerance” standards are in place for emissions.
As the conveying stream is continuous dilute phase is the obvious choice for FGD systems.
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