Wet desulfurization of exhaust gas in direct reduction iron manufacturing process
专利汇可以提供Wet desulfurization of exhaust gas in direct reduction iron manufacturing process专利检索，专利查询，专利分析的服务。并且PURPOSE: To carry out public nuisance free desulfurization inexpensively, by a method wherein the waste material of a direct reduction iron manufacturing process is utilized as the Ca compound to be used in a gypsum process and H
2 S generated at the time of neutralization of sulfuric acid is burnt and retreated as SOx or subjected to Claus reaction to recover elementary S.
CONSTITUTION: After exhaust gas G from a direct reduction iron manufacturing process is sent to a pre-scrubber 1 to cool and remove dust therein, the treated gas is sent to an absorbing apparatus 2 to absorb and remove SO
2 in the exhaust gas by an absorbing liquid L
q . Formed H
2 SO
3 is sent to an oxidizing apparatus 3 to be converted to sulfuric acid through oxidation by the air and a part thereof is sent to the crystallizing tank 5 of a gypsum process. The waste material Mx of the direct reduction iron manufacturing process such as CaO or CaS is introduced into the crystallizing tank 5 to neutralize sulfuric acid to form gypsum. H
2 S generated at this time is burnt in a combustion furnace 6 to be again returned to the pre-scrubber 1 as SO
2 or sent to a Claus reaction furnace 8 to recover elementary S. Gypsum from the crystallizing tank 5 is recovered in a centrifugal separator 7 with washing water W
2 .
COPYRIGHT: (C)1983,JPO&Japio，下面是Wet desulfurization of exhaust gas in direct reduction iron manufacturing process专利的具体信息内容。
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