| 摘要 |
<p>1,090,714. Feed water heating. FOSTER WHEELER Ltd. Dec. 13, 1965 [Dec. 14, 1964], No. 50794/64. Heading F4A. Feed water is pre-heated by passing through a coil 20 in the steam and water or water drum 12 of a boiler 10, before being heated in economiser 22 in a flue 24 through which pass exhaust gases from flue 18 of boiler 10, and/or exhaust gases from a Diesel engine. The heated water is then fed into drum 12. A steam generating coil 26 fed by pump 27 from water drum 11 may also be incorporated in duet 24. Valve controlled by-passes may be provided for the coil 20 and the economiser 22 (see Fig. 4, not shown). The invention may be applied to a compound boiler (see Fig. 3, not shown) wherein low pressure steam is generated in a drum (32) by high-pressure steam itself generated in boiler (10a), passing through tube nest (30). The feed water for drum (32) is pre-heated in coil (34) before passing to economiser (22a), in duct (36).</p> |
