C - Chemistry – Metallurgy – 01 – B
Patent
C - Chemistry, Metallurgy
01
B
23/332, 23/345
C01B 17/04 (2006.01) B01D 53/04 (2006.01) B01D 53/14 (2006.01) B01D 53/34 (2006.01) C10K 1/20 (2006.01)
Patent
CA 1324875
ABSTRACT OF THE INVENTION In a method for absorbing and removing sulfur compounds such as hydrogen sulfide and carbonyl sulfide present in a high-temperature reducing gas using an absorbent, disclosed is a method for purifying a high-temperature reducing gas which is characterized in that: said method uses at least four towers of reactors filled with an absorbent and comprises four steps which are an absorption step for absorbing and removing sulfur compounds with an absorbent, a regeneration step for regenerating said absorbent using a gas containing oxygen, a cooling step after the regeneration step, and a reduction step for reducing said regenerated and cooled absorbent with a high-temperature reducing gas until the concentration of the reducing gas becomes uniform before and after passing through the absorbent; heat is continuously recovered from the high-temperature gas at the outlet of the regeneration reactor in said regeneration step; and the regeneration and absorption performance is thus stabilized. Also disclosed is a method for purifying a high- temperature reducing gas which is characterized in that this method uses at least four towers filled with an absorbent as in the above method; and an additional preliminary regeneration step is provided besides the above four steps in order to make (2) possible a smooth operation when switching to the regeneration step and the continuous recovery of sulfur.
590569
Inoue Kenji
Kobayashi Makoto
Mitsuoka Shigeaki
Nakayama Toshio
Seto Toru
Central Research Institute Of Electric Power Industry
Marks & Clerk
Mitsubishi Jukogyo Kabushiki Kaisha
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