直接碱催化水解法脱除羰基硫的技术经济分析
|
摘要
为了研究脱除钢铁厂高炉煤气中羰基硫(COS)的技术方法,以便降低其燃烧后排放的SO_2浓度,达到改善环境空气质量的目的。用玻板吸收管组成反应体系,以NaOH为催化剂,以羰基硫标准气和高炉煤气为对象,研究了在不同碱度、不同温度下羰基硫的水解反应,给出了不同条件下的去除率,证实NaOH可以有效地对羰基硫的水解反应进行催化,在一定范围内其浓度越高,水解反应速度越快,且水解反应速度与反应温度正相关,在NaOH催化下水解反应可以有效地去除钢铁厂高炉煤气中的羰基硫。同时,分析了羰基硫在高炉煤气中存在的特性及其达标排放可行性,为钢铁企业治理高炉煤气中羰基硫提供参考。
In order to study the technical method of removing carbonyl sulfur(COS)from blast furnace gas of steel plants,so as to reduce the concentration of SO_2 emitted after combustion and improve the quality of ambient air.By using the reaction system that composed of glass absorption tubes,taking NaOH as the catalyst,and taking carbonyl sulfide gas and blast furnace gas as the medium,hydrolysis reaction on the carbonyl sulfide was investigated under different alkalinity and temperature.The COS removal efficiency in different situations was obtained.It is proved that NaOH can effectively catalyze the hydrolysis reaction of carbonyl sulfur.In a certain range,the higher the concentration of NaOH is,the faster the hydrolysis rate of carbonyl sulfur is,and the hydrolysis reaction rate is positively related to the reaction temperature.Hydrolysis reaction can effectively remove carbonyl sulfur from blast furnace gas of iron and steel plants under the catalytic reaction conditions of NaOH.In addition,the COS characteristics in blast furnace gas and the feasibility of standard discharge were analyzed,which provided useful references for the remediation of COS in iron and steel industry.
In order to study the technical method of removing carbonyl sulfur(COS)from blast furnace gas of steel plants,so as to reduce the concentration of SO_2 emitted after combustion and improve the quality of ambient air.By using the reaction system that composed of glass absorption tubes,taking NaOH as the catalyst,and taking carbonyl sulfide gas and blast furnace gas as the medium,hydrolysis reaction on the carbonyl sulfide was investigated under different alkalinity and temperature.The COS removal efficiency in different situations was obtained.It is proved that NaOH can effectively catalyze the hydrolysis reaction of carbonyl sulfur.In a certain range,the higher the concentration of NaOH is,the faster the hydrolysis rate of carbonyl sulfur is,and the hydrolysis reaction rate is positively related to the reaction temperature.Hydrolysis reaction can effectively remove carbonyl sulfur from blast furnace gas of iron and steel plants under the catalytic reaction conditions of NaOH.In addition,the COS characteristics in blast furnace gas and the feasibility of standard discharge were analyzed,which provided useful references for the remediation of COS in iron and steel industry.
引文
[1]刘润静,李小云.氢氧化钠水溶液吸收羰基硫反应级数研究[J].河北轻化工学院学报,1997,18(1):49.
[2]刘润静,张成芳,钦淑均,等.羰基硫在氢氧化钠溶液中的水解动力学[J].化工学报,1992,43(2):165.
[3]梁美生,李春虎,郭汉贤,等.低温条件下羰基硫催化水解反应本征动力学的研究[J].催化学报,2002,23(4):357.
[4]李新学,刘迎新,魏雄辉.羰基硫脱除技术[J].现代化工,2004,24(8):19.
[5]赵骧.脱毒催化剂现状及其进展[J].工业催化,2005,13(增刊):185.
[6]王芳芳,赵海,张德祥,等.铁锰系脱硫剂对煤气中羰基硫的脱硫机理初探[J].煤炭学报,2008,3(2):197.
[7]郭汉贤,苗茂谦,张允强,等.TGH-3Q型羰基硫常低温水解催化剂及其应用[J].化工催化剂及甲醇技术,2003(5):4.
[8]高志华,阴丽华,李春虎,等.纳米α-FeOOH催化剂一段法脱除COS和H2S性能的研究[J].燃料化学学报,2003,31(3):249.
[9]梁美生,李春虎,郭汉贤,等.低温条件下二氧化碳存在时羰基硫催化水解本征动力学[J].燃料化学学报,2003,31(2):149.
[10]张益群,肖忠斌,马建新,等.O2和SO2对稀土氧硫化物上羰基硫水解反应的影响[J].复旦学报:自然科学版,2003,42(3):379.
[11]湖北省化学研究院气体净化中心.COS,CS2低、常温水解脱除技术进展[J].气体净化,2004,4(1):2.
[2]刘润静,张成芳,钦淑均,等.羰基硫在氢氧化钠溶液中的水解动力学[J].化工学报,1992,43(2):165.
[3]梁美生,李春虎,郭汉贤,等.低温条件下羰基硫催化水解反应本征动力学的研究[J].催化学报,2002,23(4):357.
[4]李新学,刘迎新,魏雄辉.羰基硫脱除技术[J].现代化工,2004,24(8):19.
[5]赵骧.脱毒催化剂现状及其进展[J].工业催化,2005,13(增刊):185.
[6]王芳芳,赵海,张德祥,等.铁锰系脱硫剂对煤气中羰基硫的脱硫机理初探[J].煤炭学报,2008,3(2):197.
[7]郭汉贤,苗茂谦,张允强,等.TGH-3Q型羰基硫常低温水解催化剂及其应用[J].化工催化剂及甲醇技术,2003(5):4.
[8]高志华,阴丽华,李春虎,等.纳米α-FeOOH催化剂一段法脱除COS和H2S性能的研究[J].燃料化学学报,2003,31(3):249.
[9]梁美生,李春虎,郭汉贤,等.低温条件下二氧化碳存在时羰基硫催化水解本征动力学[J].燃料化学学报,2003,31(2):149.
[10]张益群,肖忠斌,马建新,等.O2和SO2对稀土氧硫化物上羰基硫水解反应的影响[J].复旦学报:自然科学版,2003,42(3):379.
[11]湖北省化学研究院气体净化中心.COS,CS2低、常温水解脱除技术进展[J].气体净化,2004,4(1):2.