Heat exchanger maintenance technique
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United States of America Patent
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Oct 13, 2015
Grant Date -
Oct 13, 2011
app pub date -
Apr 11, 2011
filing date -
Apr 10, 2010
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A heat exchanger is cleaned, inspected and/or plugged while the heat exchanger is in operation. In some embodiments, the heat exchanger includes a channel cover having valve-seal assemblies allowing isolation tools to be inserted through the channel cover into sealing engagement with the ends of tubes to provide a flow path separate from the normal flow paths through the heat exchanger. Cleaning and/or inspecting can be done through the isolation tools and tubes that are leaking can be plugged through the valve-seal assemblies. In some embodiments, brushes are located inside the heat exchanger and can be independently advanced into cleaning relation with a large majority of the tubes.
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