Method for cleaning internal heat transfer surfaces of boiler tu

Details Method for cleaning internal heat transfer surfaces of boiler tu Method for cleaning internal heat transfer surfaces of boiler tu

1983-02-03

1986-04-08

Woo, Jay H.

Cleaning and liquid contact with solids

Processes

For metallic, siliceous, or calcareous basework, including...

134 2212, 134 2215, 134 36, 148 635, 252 95, B08B 308, B08B 902

Patent

active

045810745

ABSTRACT:
A method for cleaning and removing iron oxide deposits from the internal heat transfer surfaces of boiler tubes, which consists in purging the tubes with superheated steam and oxygen driven at a speed of 20 to 80 m/sec. The oxygen content is 0.3 to 1.0 kg per ton of steam. The process both cleans and passivates the metal surfaces of the tubes.

REFERENCES:
patent: 1470359 (1923-10-01), Greenstreet
patent: 3084076 (1963-04-01), Loucks et al.
patent: 3173874 (1965-03-01), Sewell et al.
patent: 3297481 (1967-01-01), Newman
patent: 4282715 (1981-08-01), Edwall et al.
Defense Science Journal, "Removal of External Deposits on Boiler Tubes", Jul. 1970, pp. 195-200, De et al.
"Chemical Cleaning of Heat-Power Equipment", Issue 2, Moscow, Energia, 1978, pp. 6, 7, 30, 31; Margulova.
"Power Plant Engineering", No. 1, 1980, pp. 42-45, Aleinikov et al.

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