Feed-water heaters, e.g. preheaters

Classification Context

Section:

MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING

Class:

STEAM GENERATION

Subclass:

PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS

Child Classifications

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• F22D 1/02 with water tubes arranged in the boiler furnaces, fire tubes or flue ways
• F22D 1/16 with water tubes arranged otherwise than in the boiler furnace, fire tubes, or flue ways
• F22D 1/24 with fire tubes or flue ways traversing feed-water vessels
• F22D 1/26 with means, other than tubes, to separate water and heating medium, e.g. bulk heaters without internal flues or tubes, jacketted smoke-boxes or flues
• F22D 1/28 for direct heat transfer, e.g. by mixing water and steam
• F22D 1/32 arranged to be heated by steam, e.g. bled from turbines
• F22D 1/36 Water and air preheating systems
• F22D 1/4 Combinations of exhaust-steam and smoke-gas preheaters
• F22D 1/42 specially adapted for locomotives
• F22D 1/5 incorporating thermal de-aeration of feed-water