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Dilute Phase Pneumatic Conveyors

Whirl Air Flow provides a full line of Dilute Phase Pneumatic Conveying Systems in order to meet your needs. Dilute Phase Pneumatic Conveying Systems are normally used for conveying non-abrasive materials. Dilute Phase Systems are also used when high material velocities and product degradation are not factors. There are many advantages to using a dilute phase pneumatic conveying system for certain applications. 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 Dilute Phase Pneumatic Conveying 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.  
Dilute Phase Pneumatic Conveying is a popular method used to move solid materials in gas or air suspension using a low solid to air ratio and is a specialty of Sly Process Systems. In contrast, dense phase pneumatic conveying uses a high solid to air ratio.


In Dilute Phase Pneumatic Conveying Systems, Pressure operation uses centrifugal fans or PD blowers to send materials across the pipeline. Once it reaches the destination, air and material are separated by a filter or other system. Feeding Systems are used so that materials can enter the pipeline at a greater pressure and the material is then conveyed in suspension or by force at an optimum velocity through the Dilute Phase Conveying System.
Sly Process Systems offers two Pressure Operated Dilute Phase Conveying Systems - Batch Dilute Phase Pressure and Continuous Dilute Phase Pressure. Batch Dilute Phase Pressure Conveying systems allow the material to be transported in distinct batches at the  starting point and/or destination. Continuous Dilute Phase Pressure Conveying Systems  allow the material to be constantly supplied at the starting point and it arrives continuously at the destination without interruption.


In Dilute Phase Pneumatic Conveying Systems, Vacuum operation uses centrifugal exhausters or PD blowers providing up  to 50% vacuum to convey the materials across the pipeline. Once it reaches the destination, air and material are separated with a filter or  cyclone. Sly Process Systems offers Continuous Dilute Phase Vacuum conveying systems, and Batch Dilute Phase Vacuum conveying systems. In the case of a continuous dilute phase pneumatic conveying system, the material  enters the pipeline directly of through the feeding system and is then suspended in the  airflow where it is conveyed at an optimum velocity across the pipeline.  Material then enters a receiving vessel on a continuous basis, and is  typically discharged to the process through some type of airlock.
In a Batch Dilute Phase Vacuum conveying system, material is conveyed to a receiving  vessel in batches where it is discharged through a simple gravity or  air operated gate into the process. The vacuum batch conveying method is generally more cost effective as the continuous feeding airlock is eliminated at the discharge point
Dilute Phase Conveying
Flue Gas De-Sulfurization (FGD) System
Conveying Reactant into Gas Steam
In this typical dilute phase system, flowable products are unloaded using a vacuum/pressure unloading system from railcar to storage silos. Products are then conveyed from the silos to in-plant process areas using a separate pressure system. Dilute phase systems are generally used when conveying non-abrasive materials or where high material velocities are not a factor.
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