| 摘要 |
999,949. Heating air or liquid by waste gases. INDUSTRIE COMPANIE KLEINWEFERS KONSTRUKTIONS-UND HANDELSGESSELLSCHAFT m.b.H. Aug. 16, 1961 [Sept. 7, 1960], No. 29521/61. Heading F4S. In a heating-gas duct 1 is arranged a plurality of tube banks carrying air or a liquid to be heated by the gas, each tube bank consisting of two sets of metal tubes 30 connected at their upper ends to individual headers 13, 14 which form a sealed closure for openings 8, 9 in the duct wall, and at their lower ends to a return header 15. The tubes in the form shown, are accommodated in a widened portion 29 of the gas duct. The headers are arranged out of the direct line of gas flow, the return headers 15 being accommodated in pockets 3-5 (and 6, not shown) and the upper headers being disposed in the duct wall openings and being sealed therein to prevent leakage of gas. Seals may also be provided around the headers 15.
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