Apparatus and process for preheating main boiler superheater hea

Details Apparatus and process for preheating main boiler superheater hea Apparatus and process for preheating main boiler superheater hea

1976-06-30

1977-11-01

Sprague, Kenneth W.

Liquid heaters and vaporizers

Steam treatment

Water tube boiler

122 1R, 122504, F22G 300, F22B 3742

Patent

active

040560791

ABSTRACT:
An apparatus and process for preventing thermal shock caused by the introtion of steam into a superheater header by preheating the header with an electrical heating element located on the header before boiler light-off and the introduction of any steam. A temperature sensor located on the header controls the coupling of the heating element to its voltage source to maintain the temperature of the header within a predetermined range.

REFERENCES:
patent: 3062553 (1962-11-01), Juzi
patent: 3636929 (1972-01-01), Sanders
patent: 3918411 (1975-11-01), Wolowodiuk

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