摘要
采用氧化方式对铁基脱硫渣进行再生和循环脱硫.结果表明,在Na OH浓度50 g/L、温度50℃的条件下,用1倍理论量的双氧水氧化脱硫渣,脱硫渣中硫的去除率和再生后的循环除硫率分别为97.70%和40.90%;在Na OH浓度50 g/L、温度70℃、通气速率1.2 L/min和通气时间110 min的条件下,用氧气氧化脱硫渣,硫去除率和循环除硫率分别为83.71%和52.74%.脱硫渣在碱性体系中被氧化,其中的硫主要以S2O32-形式进入液相,固相中的铁转变为Fe OOH.
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 Na OH. 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 Na OH. When the residue was oxidized in alkaline system, sulfur species of the residue mainly converted to S2 O3^2-in liquid phase and the iron species could transform into Fe OOH in solid phase.
出处
《过程工程学报》
CAS
CSCD
北大核心
2017年第6期1227-1232,共6页
The Chinese Journal of Process Engineering
基金
国家自然科学基金资助项目(编号:51374239)
关键词
铁基脱硫渣
氧化
再生
循环脱硫
碱性体系
iron-based desulfurization
oxidation
regeneration
cyclic desulfurizing
alkaline system
