Laser removal of sludge from steam generators

Details Laser removal of sludge from steam generators Laser removal of sludge from steam generators

1989-09-12

1990-05-01

Wasil, Daniel

Cleaning and liquid contact with solids

Processes

Including application of electrical radiant or wave energy...

134 18, 122379, 165 95, B08B 700, F28G 1300

Patent

active

049209949

ABSTRACT:
A method of removing unwanted chemical deposits known as sludge from the metal surfaces of steam generators with laser energy is provided. Laser energy of a certain power density, of a critical wavelength and frequency, is intermittently focused on the sludge deposits to vaporize them so that the surfaces are cleaned without affecting the metal surface (sludge substrate). Fiberoptic tubes are utilized for laser beam transmission and beam direction. Fiberoptics are also utilized to monitor laser operation and sludge removal.

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Graham, Frank D., Power Plant Engineers Guide, 3d ed. (Indianapolis, 1983), pp. 46, 47, 111,115, 125-126, 518-531.
Laurence, Clifford L., The Laser Book: A New Technology of Light, 1st ed. (New York, Prentice Hall, 1986), pp. 73-74, 91, 137-140, 147-149.
Woodruff et al., Steam Plant Operation, 4th ed. (New York, McGraw Hill, 1977), pp. 3-4, 6-7, 42, 55-57, 263-269, 306-309.
Coherent, Inc., Lasers (New York, McGraw Hill, 1980), pp. 24, 26-27, 34-35, 37-38, 48-49, 100-101.

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