Powder and Bulk Engineering
Tuesday, September 02, 2014
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Powder and Bulk Engineering is a technical publication devoted to readers in the bulk solids market, worldwide.
Test Centers
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Publication Date: 03/2013
Pages: 4
PDF Format
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Test center proves solids-conveying venturi eductor’s capabilities

An equipment supplier’s test center shows customers the benefits of using a solids-conveying venturi eductor to feed material into a pneumatic conveying system.

Companies that handle dry bulk solids often use a positive-pressure dilute-phase pneumatic conveying system to transfer a material a long distance between process steps, such as from a hopper to a blender. When using such a conveying system, a rotary airlock (also called a rotary feeder or rotary valve) typically meters the material into the conveying line and creates a seal that keeps the pressurized conveying air in the system. However, a rotary airlock frequently requires maintenance and can damage material, leak fugitive dust, and cause cross-contamination, all of which can keep a company’s operation and maintenance costs high and adversely affect the material’s end quality. One way to prevent these problems is to use a venturi eductor rather than a rotary airlock or other feed device to feed the material into the conveying line.

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