Steam generator

Details Steam generator Steam generator

F - Mech Eng,Light,Heat,Weapons

22

B

F22B 37/12 (2006.01) F22B 29/06 (2006.01)

Patent

CA 2142840

Abstract In a fossil-fired steam generator (1) with a gas flue, whose surrounding wall (2) is formed by tubes (4) which are mutually joined gas-tight and which are arranged substantially vertically and can take upward flows on the medium side, it is provided according to the invention that the tubes (4) in a first or lower part (5) of the gas flue have a greater internal diameter (d1) than the tubes (4) in a second part (7), located there- above, of the gas flue. On the one hand, this ensures reliable cooling of the tubes (4). On the other hand, even additional or above-average heating of individual tubes (4) does not lead to inadmissible temperature differences between the outlets of the tubes (4). FIG 2

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