Pneumatic Conveying of Cement

 

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Pneumatic Conveying Systems

 

Every pneumatic conveying system, would makes use of pipes or ducts called transportation lines that carry a mixture of materials and a stream of air. These materials include dry pulverized or free flowing or light powdery materials like cement, fly ash etc. These materials can be transported conveniently to various destinations by means of a stream of high velocity air pipe lines.

Products are moved through various tubes via air pressure, allowing for extra vertical versatility. Pneumatic Conveyors are either carrier systems or  Dilute Phase Conveyors carrier systems which simply push items from one entry point to one exit point. Dilute-phase systems use push-pull pressure to guide materials through various entry and/or exit points. It is important to note that either air compressors, vacuums, or blowers can be used to generate the air. This will all depend on what the engineers think will be the most efficient and economical way of developing the system.

 

Three basic systems that are used to generate high velocity air stream:

  1. Suction or vacuum systems: Employs a vacuum created in the pipeline to draw the material with the surrounding air. The system  is operated at a low pressure, approximately 40-50 kPa below atmosphere, and is utilized mainly in conveying light free flowing materials
  2. Pressure-type systems:  A positive pressure is used to push material from one point to the next. The system is ideal for conveying material from one loading point to a number of unloading points. It operates at a pressure of approximately 60 kPa and above.
  3. Combination systems: A suction system is used to convey material from a number of loading points and a pressure system is employed to deliver it to a number of unloading points.

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