Reaction tube system for a steam reformer

Details Reaction tube system for a steam reformer Reaction tube system for a steam reformer

1985-08-09

1987-03-03

Marcus, Michael S.

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Including heat exchanger for reaction chamber or reactants...

1651341, 165913, 165921, 196107, 196110, 196116, 285 45, 285115, 285329, 405216, 422148, 422203, 422312, B01J 806, F16L 1302

Patent

active

046474366

ABSTRACT:
A reaction tube system of a steam reformer, more generally referred to as tubular cracking furnace, for the indirect heating of cracking feedstock, such as the catalytic cracking of hydrocarbons, includes a plurality of reaction tubes and headers, the reaction tubes penetrating through the bottom of the steam reformer and being extended to the associated header by low-alloy tube sections attached to the tubes by circumferential welds. The reaction tubes are surrounded in the area of the weld(s) by a coaxial protective tube having one open end and defining a free annular space around the reaction tube. The protective tube prevents deterioration by corrosion of the weld(s) joining the tube sections of high-alloy steel with low-alloy extension sections with unalloyed steel extension section.

REFERENCES:
patent: 3600141 (1971-08-01), Mevenkamp et al.
patent: 3907336 (1975-09-01), Siegmund
patent: 4175779 (1979-11-01), Apblett, Jr.

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