Targeted heat exchanger deposit removal by combined dissolution and mechanical removal
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United States of America Patent
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May 10, 2016
Issued Date -
N/A
app pub date -
Oct 29, 2013
filing date -
Oct 29, 2013
priority date (Note) -
In Force
status (Latency Note)
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Abstract
This invention relates to compositions and methods for the at least partial dissolution, disruption and/or removal of deposit, such as scale and other deposit, from heat exchanger components. The heat exchanger components can include pressurized water reactor steam generators. In accordance with the invention, elemental metal is added locally to the surface of the deposit and/or anodic or cathodic current is applied locally to the deposit surface to destabilize or weaken the deposit. Subsequently, mechanical stress is applied to the weakened deposit to disrupt and remove the deposit from the surface of the heat exchanger component.
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International Classification(s)
- B24C:ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATE....
- G21F:PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, C....
- F28G:CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-....
- F22B:METHODS OF STEAM GENERATION; STEAM BOILERS
- C23F:NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM S....
- C25F:PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIAL....
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