F - Mech Eng,Light,Heat,Weapons – 28 – F
Patent
F - Mech Eng,Light,Heat,Weapons
28
F
257/4
F28F 13/04 (2006.01)
Patent
CA 1108598
Abstract of the Disclosure The addition of external heat to a gas stream in duct work passing from the intermediate absorber to the heat exchanger employed to raise the temperature of the gas stream containing residual sulfur dioxide to its catalytic iniation temperature in a multiple contact/multiple absorption process for the manufacture of sulphuric acid in an amount sufficient to maintain the gas stream above the dew point of sulfuric acid is employed to eliminate corrosion in both the ductwork and the heat exchanger(s). There is also provided by the invention an indirect gas to gas heat exchanger especially adapted to take account of the fact that the cooler gas stream contains condensible corrosive constituents. This exchanger immediately follows intermediate absorption and includes a zone maintained at a temperature above the condensation temperature of sulfuric acid to prevent condensation of acid mist on the heat exchanger surfaces.
333500
Hirons & Rogers
Parsons (ralph M.) Company (the)
LandOfFree
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