Hydrogen Production From Refinery Acid Gas And Sour Water Stripper

Abstract: This invention relates to the production of hydrogen (5) from a hydrogen sulphide an ammonia containing first feed steam (1), comprising: (a) oxidizing part of the hydrogen sulphide content of said first feed stream (1) in a flame region in a Claus furnace (C) to form sulphur dioxide, and reacting hydrogen sulphide and sulphur dioxide in the furnace (C) and in downstream catalytic reactors (K) to form sulphur; (b) introducing into the Claus furnace (C) as second feed stream (2) pure oxygen or oxygen enriched air to achieve a temperature to within a range of 1300-1500°C, and providing conditions for a high level of hydrogen sulphide dissociation into hydrogen and sulphur; (c) controlling the Claus furnace temperature, so not to cause refractory damage; (d) quenching the Claus reaction furnace exhaust gas (7) upstream the catalytic reactors (K) in less than 6 milliseconds to a temperature below 150°C; (e) extracting sulphur from the gas downstream the quench and downstream the catalytic reactors (K); (f) hydrotreating the sulphur depleted gas (8) in a hydrodesulphurisation unit (H) to form a hydrotreated gas (9), and (g) separating off hydrogen (5) from the hydrotreated gas (9).

Patent Information

Applicants

Inventors

Specification

Documents

Application Documents