The principle of pneumatic conveying is based on the fact that bulk goods can be moved by means of air through pipelines. The flowing conveying air transmits a propulsion force on the bulk material and thus conveys it through the conveying line. The pneumatic conveying always requires a pressure difference between the beginning and the end of the pipeline. To overcome this pressure difference, conveying blowers or compressors are used.
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The height of the pressure difference to be applied depends not only on the length and layout- the isometry – of the conveying line but also on the concentration of the bulk material in the conveying line – the loading. The pneumatic conveying methods can be distinguished in terms of their loading in lean phase, strand phase and dense phase conveying.
Generally, one differentiates between suction and pressure conveying systems and the combined suction pressure conveying systems.
Historically, the first pneumatic conveyor systems were created in connection with the discharge of grain from overseas ships. Later, this new technology of continuous development spread into other process engineering areas.
Today’s special applications are:- Burner feeding with combustible dusts and alternative fuels in the cement industry
- Feed lance injection and pneumatic transport feeding in the area of Steelmaking FE and non-ferrous iron-metal smelting
- Pneumatic conveying in the recycling sector
- Injection of alternative fuels in fluidized beds at power plants
The transfer of powders, granules, flakes and other dry bulk solids materials through enclosed convey lines utilizing air, which is typically generated from a fan or blower.
Schenck Process offers the following pneumatic conveying systems for a wide range of applications:- Low pressure continuous dense phase
- Vacuum dense phase
- Pressure dilute phase
- Vacuum dilute phase
- Vacuum/pressure dilute phase combination
- Products with heavy bulk densities
- Abrasive products, such as sugar
- Friable products, such as pet food post-extruder and carbon black prills
- Blended products, such as detergents
- Products that do not require continuous delivery to their destination, such as plastic pellets
- Materials with light bulk densities
- Non-abrasives such as flour
- Products that are not easily breakable
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