The regeneration and cyclic desulfurizing of iron-based desulfurization residue by oxidation was studied. The results indicated that sulfur removal rate of the residue and cyclic desulfurization rate of the regenerative desulfurizer were 97.70% and 40.90% respectively, after the desulfurization residue was oxidized at 50℃ with 1 times theoretical dosage of hydrogen peroxide and 50 g/L NaOH. While, the sulfur removal rate and the cyclic desulfurization rate were correspondingly 83.71% and 52.74%, by aerating oxygen at 1.2 L/min and oxidizing the residue at 70℃ for 110 min with 50 g/L NaOH. When the residue was oxidized in alkaline system, sulfur species of the residue mainly converted to S2O32? in liquid phase and the iron species could transform into FeOOH in solid phase.
Pengju HU Zhihong PENG Qiusheng ZHOU Tiangui QI Guihua LIU Xiaobin LI
. Regeneration and Cyclic Utilization of Iron-based Desulfurization Residue[J]. The Chinese Journal of Process Engineering, 2017
, 17(6)
: 1227
-1232
.
DOI: 10.12034/j.issn.1009-606X.217157
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