Method of and system for controlling the claus chemical process

Details Method of and system for controlling the claus chemical process Method of and system for controlling the claus chemical process

B - Operations, Transporting

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D

23/385

B01D 53/34 (2006.01) C01B 17/04 (2006.01) G01N 31/16 (2006.01) G05D 21/02 (2006.01)

Patent

CA 1064680

METHOD OF AND SYSTEM FOR CONTROLLING A CHEMICAL PROCESS ABSTRACT OF THE DISCLOSURE An improved and modified Claus process control system utilizing first and second coulometric titrators for automatically controlling the amount of oxygen used in burning a portion of the hydrogen sulfide (H2S) in flue gases. The first and second titrators are fed sulfur dioxide (SO2) and H2S scrubbed samples, respectively, of the flue gases downstream of the oxygen injection point. The first and second titrators produce H2S and SO2 analog output signals, respectively, which are used to control the rate of flow of oxygen or air injected in a manner such that the samples of the flue gases contain H2S in a concentration which is approximately or exactly equal to twice the concentration of the SO2 therein.

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