Hydrocarbon steam reforming using series steam superheaters

Details Hydrocarbon steam reforming using series steam superheaters Hydrocarbon steam reforming using series steam superheaters

1983-11-10

1985-10-08

Valentine, Donald R.

Chemistry of inorganic compounds

Hydrogen or compound thereof

Elemental hydrogen

252373, C01B 324, C07C 102

Patent

active

045459762

ABSTRACT:
In a process for steam reforming of a hydrocarbon gas feedstream wherein: (a) the hydrocarbon gas feedstream is partially reformed at elevated temperatures in indirect heat exchange with hot combustion gases in a direct fired primary reforming furnace provided with a convection section for recovery of excess heat from said combustion gases; and (b) the partially reformed feedstream is then further reformed in the presence of an oxygen-containing gas and steam in a secondary reformer to form a secondary reformer gaseous effluent; the improvement which comprises recovering waste heat from said secondary reformer effluent gas and from said primary reforming combustion products by (i) heating a high pressure saturated steam in a first steam superheating zone by indirect heat exchange with at least a portion of said secondary reformer effluent gas to form a first superheated steam stream; and (ii) further heating said first superheated steam in a second steam superheating zone by indirect heat exchange with at least a portion of said primary reformer hot combustion gases to form a second superheated steam stream.

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