Dense phase particulate conveying system and method with continuous air leakage management
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United States of America Patent
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Sep 29, 1998
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app pub date -
Jun 28, 1996
filing date -
Jun 28, 1996
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Abstract
A continuous dense phase conveying system and method regulates and modulates the volume of gas flowing at a low velocity within a material conveying pipe. In response to air volume leakage through a rotary airlock valve, a controller adjusts a flow control valve to maintain the volume of air for conveying at a selected level. The flow control valve has a venturi-shaped output section. The flow control valve is more than 90% efficient (e.g., less than 10% pressure drop across the valve) and has an output that varies linearly, over a wide range, with adjustment of the valve.
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