Improvements in or relating to feedwater heaters for locomotive and like boilers

摘要

323,886. Trevithick, F. H. Dec. 5, 1928. Feedwater, heating.-A feedwater heater 1 attached to the door 3 of a locomotive smokebox, as described in Specification 170,326, encloses an openended tubular member 15 forming an extension of the chimney 11. Coiled or U-shaped feedheating tubes arranged horizontally are connected to headers 4 on the outside of the smoke-box door. Plates 6, 5 at the top and bottom of the tubes force the furnace gases to pass between the tubes on their way to the chimney. A perforated cylinder 14 serving as a spark arrester is arranged between the tubes and the tubular member 15, which is so supported upon the plate 6 by a flange 16 held by pins 37 that the member may be readily removed, say when starting up. The chimney 11 may be formed with a separate lower part 36 resting upon the feed heater. In a modification, the spark arrester is U-shape and is supported by the smoke-box door. The feedwater is heated by main engine and pump engine exhaust, and by surplus boiler steam before entering the smokebox heater.