Cleaning and liquid contact with solids – Processes – Including application of electrical radiant or wave energy...
Patent
1984-12-26
1987-10-13
Fisher, Richard V.
Cleaning and liquid contact with solids
Processes
Including application of electrical radiant or wave energy...
15 1, 134 17, 134 21, 134 2212, 134 2218, 134 37, 165 95, 376316, B08B 312, B08B 500, B08B 902
Patent
active
046996656
ABSTRACT:
The present invention relates to an improved method of cleaning a nuclear steam generator by removing the buildup of deposits which accumulate on the upper tube support plates, on the heat exchanger tubes, on flow holes in the support plates and between the support plates and heat exchanger tubes, and on other secondary side surfaces of a heat exchanger vessel through utilization of a repetitive shock wave induced in the deposits. The shock wave serves to effectively and safely loosen the products of corrosion and other elements which settle on these surfaces of the heat exchanger vessel and thereby facilitiates their easy removal through flushing and vacuuming the vessel. The shock waves are induced by air-gun type pressure pulse shock wave sources or pressurized gas-type pressure pulse shock wave sources.
REFERENCES:
patent: 3517674 (1970-06-01), Allen et al.
patent: 4320528 (1982-03-01), Scharton et al.
patent: 4366003 (1982-12-01), Korte et al.
patent: 4407236 (1983-10-01), Schukei et al.
Scharton Terry D.
Taylor George B.
Anco Engineers, Inc.
Fisher Richard V.
Jones W. Gary
Rozsa Thomas I.
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