Low pressure continuous dense phase convey system using a non-critical air control system
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United States of America Patent
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Jun 10, 2014
Grant Date -
Nov 3, 2011
app pub date -
May 2, 2011
filing date -
May 3, 2010
priority date (Note) -
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Abstract
An air control system for a low pressure continuous dense phase convey system employs a non-critical air flow control system that allows for a supply pressure to be only incrementally larger than a convey pressure. The convey system has an inlet for introduction of pressurized air into the system and an airlock associated with a feedpoint for introduction of particulate into the system. A first pressure sensor is positioned immediately downstream of an air source to measure the supply pressure, and a second pressure transducer is positioned proximate an airlock to measure the convey pressure. The non-critical air flow control system is dependent on the supply and convey pressures and a position of a control valve, such as a sonic nozzle. The difference between the convey pressure and the supply pressure is less than 10% of the supply pressure.
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