| 摘要 |
1,066,775. Tubular heat exchangers. BABCOCK & WILCOX CO. Feb. 25, 1965 [Feb. 25, 1964], No. 8206/65. Heading F4S. A heat exchanger comprises a vessel 10 containing bundles of heat exchange tubes 26 connected in parallel with each other and in series with helically coiled tubes 38 which take up expansion of the tubes 26. Primary fluid enters at 22, flows through the bundles of tubes 26 to headers 34 each connected to sets of the tubes 38 which are shielded by sleeves 54 and which lead to lower headers 40, connecting tubes 42, a tube plate 44 and an exit nozzle 20. Secondary fluid admitted at 30 flows around the tubes to outlets 32. The headers 34 are hemispherical with hexagonal tube plates 36 (Fig. 3) which are arranged in a staggered relationship with each other leaving a triangular flow path (50) for secondary fluid at each corner of the plates, additional secondary fluid flow paths being provided by notches (52) in the edges of the tube plates 36. The tubes 26 are arranged with a uniform triangular spacing. The tube assembly can be removed by detaching a headr 14 and a split ring 48. In a modification (Fig. 4) the upper headers are spherical and the connecting tubes lead to a collecting chamber attached to the exit nozzle 20. |
