Industry
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CPC
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F22D1/00
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Sub Industries
F22D1/003Feed-water heater systems
F22D1/006with heating tubes
F22D1/02with water tubes arranged in the boiler furnace, fire tubes, or flue ways
F22D1/04the tubes having plain outer surfaces
F22D1/06in horizontal arrangement
F22D1/08the tubes having fins, ribs, gills, corrugations, or the like on their outer surfaces
F22D1/10in horizontal arrangement
F22D1/12Control devices
F22D1/14Safety or venting devices
F22D1/16with water tubes arranged otherwise than in the boiler furnace, fire tubes, or flue ways
F22D1/18and heated indirectly
F22D1/20and directly connected to boilers
F22D1/22and provided for rotary movements
F22D1/24with fire tubes or flue ways traversing feed-water vessels
F22D1/26with means, other than tubes, to separate water and heating medium
F22D1/28for direct heat transfer
F22D1/30with stages, steps, baffles, dishes, circular troughs, or other means to cause interrupted or cascading fall of water
F22D1/32arranged to be heated by steam
F22D1/325Schematic arrangements or control devices therefor
F22D1/34and returning condensate to boiler with main feed supply
F22D1/36Water and air preheating systems
F22D1/38Constructional features of water and air preheating systems
F22D1/40Combinations of exhaust-steam and smoke-gas preheaters
F22D1/42specially adapted for locomotives
F22D1/44Smoke-gas preheaters
F22D1/46Exhaust-steam preheaters
F22D1/48Details
F22D1/50incorporating thermal de-aeration of feed-water