Methods For Negating Deposits Using Cavitation Induced Shock Waves
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United States of America Patent
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Issued Date -
Aug 23, 2018
app pub date -
Feb 23, 2017
filing date -
Feb 23, 2017
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Abstract
A method for removing a surface foulant is disclosed. An operating heat exchanger is provided. A carrier liquid that contains potential fouling agents is provided to the heat exchanger. The potential fouling agents foul at least a portion of the heat exchanger. The exchanger is operated such that the carrier liquid is at a vapor pressure equal to the operating pressure. Cavitation inducing devices are provided to the exchanger. A condition indicating fouling is detected. The cavitation inducing devices are operated on a portion of the exchanger to cause a localized pressure change, vaporizing a portion of the carrier liquid and forming a transient bubble or bubbles which collapse by cavitation, producing a localized shockwave, a re-entrant microjet, and extreme transient pressures and temperatures. These steps are repeated as necessary to remove the surface foulant. In this manner, the surface foulant is removed from the operating heat exchanger.
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