Powder and Bulk Engineering
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Powder and Bulk Engineering is a technical publication devoted to readers in the bulk solids market, worldwide.
Pneumatic Points to Ponder
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Publication Date: 11/2012
Pages: 4
PDF Format
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What is dense-phase conveying?

Columnists Jack D. Hilbert and Paul E. Solt define dense- and dilute-phase conveying and provide two phase diagrams to help you better understand the difference between the conveying phases.

Dense-phase pneumatic conveying is harder to define than dilute-phase conveying — in fact, we can define dense-phase conveying as any conveying that isn't in dilute phase! And the simplest way to define dilute-phase conveying is this: Material conveyed in dilute phase doesn't settle on the bottom of a horizontal conveying line but instead remains in motion, suspended at about the conveying line's centerline while moved along by the conveying air's drag forces. The phase diagrams shown in the article illustrate the difference between dilute-phase and dense-phase conveying.

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