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Mitsubishi Heavy Industries Ltd
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Mitsubishi Heavy Industries Ltd
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Priority to JP1190181ApriorityCriticalpatent/JPS57129806A/en
Publication of JPS57129806ApublicationCriticalpatent/JPS57129806A/en
PURPOSE: To recover SO2 in combustion waste gas as solids by separating the SO2 by adsorption on an adsorbent, adding a gaseous reducing agent, and causing reduction in the presence of catalyst and the Claus reaction.
CONSTITUTION: Waste gas contg. SO2 is passed through a packed chamber 1 packed with an adsorbent such as activated carbon in an adsorption zone 2 to allow the SO2 to be adsorbed on the adsorbent. The chamber 1 is moved to a desorption zone 3, where the SO2 is desorbed with a desorbing gas almost free from oxygen, and the desorbed SO2 is cooled with a cooler 5 and fed to a reduction reactor 18 together with gaseous H2 21 as a reducing gas. In the reactor 18 reduction is caused in the presence Al2O3-Fe2O3 type catalyst to partially form H2S, and the gaseous mixture is fed to a Claus furnace 19, where S is formed by the reaction of H2S with SO2 at 150W300°C. This S-contg. gas is fed to a condenser 20 to condense, separate and recover the S.
COPYRIGHT: (C)1982,JPO&Japio
JP1190181A1981-01-291981-01-29Recovering method for sulfur
PendingJPS57129806A
(en)