电解制备高铁酸盐在线去除恶臭气体

发布时间：2018-01-14 02:22

  本文关键词：电解制备高铁酸盐在线去除恶臭气体　出处：《哈尔滨工业大学》2015年硕士论文　论文类型：学位论文

  更多相关文章： 高铁酸盐 响应面试验 H2S 氨气

【摘要】：随着城市化和工业化进程的不断推进,各个行业产生的恶臭气体越来越多。由于生活水平的提高,人们对身处的环境要求也越来越高。在一些发达国家,恶臭的事件达到了所有投诉事件的一半以上,并且有不断上升的趋势。我国城市化进程不断加快,但城市规划、工业结构的不尽合理,造成恶臭污染事件频繁发生,近几年来恶臭污染的投诉也越来越多。因此,对恶臭进行防治已经刻不容缓。本论文利用一种新型高效的绿色环保强氧化剂——高铁酸盐在线与H2S,氨气接触氧化,达到除臭目的。深入探索了影响高铁酸盐除臭的各关键因素,并在此基础上优化反应器的运行参数。本文主要研究工作如下:首先,对高铁酸盐生成的关键因进行了研究,结果表明:分有阴阳两室电解槽的电解实验效果要比单室电解槽的电解效果好;温度为65℃时,高铁酸盐的产量虽然比温度为室温(大概20℃)时,高铁酸盐的产量高,但考虑到经济因素,本论文后续实验均采用室温(20℃);电解液浓度为12mol/L时,高铁酸盐的产量最大,电流效率最高;电流密度为5m A/cm2时,高铁酸盐的产量最高,电流效率最高。在此实验的基础上,探究电解制备高铁酸盐在线去除H2S,氨气的影响因素,结果表明:运用Design Expert8.0软件对设计试验结果进行整理分析,经回归拟合后,获得回归方程预测模型:Y=96.43+2.52A+1.6B+1.85C+2.24D2 2 2 2+0.04AB-2.11AC-1.81AD?0.45BC+1.76BD-0.55CD-4.73A-5.14B-4.6C-5.84D,其中Y为电解制备高铁酸盐去除H2S气体的去除率;A为电解液浓度;B为电流密度;C为气体流速;D为气体浓度;影响电解制备高铁酸盐在线去除H2S工艺的因素从达到小依次为:电解液浓度气体浓度电流密度气体流速;确定的最优工艺条件:电解液浓度为12.5mol/L,电流密度为7.4m A/cm2,气体流速为100ml/min,气体浓度为82ppm,H2S的去除率可达到97%以上;运用Design Expert8.0软件对设计试验结果进行整理分析,经回归拟合后,获得回归方程预测模型:Y=70.6+5.23A+2.74B-2.93C-2.5D-0.19AB-2.57AC-0.4AD2 2 2 2+3.26BC+1.08BD-0.57CD-11.71A-8.01B-3.02C?1.32D,其中Y为电解制备高铁酸盐去除氨气气体的去除率;A为电解液浓度;B为电流密度;C为气体流速;D为气体浓度;影响电解制备高铁酸盐在线去除氨气工艺的因素从达到小依次为:电解液浓度气体浓度电流密度气体流速;确定的最优工艺条件:在电解液浓度为10.6mol/L,电流密度为9m A/cm2,气体流速为85.7ml/min,气体浓度为91ppm,氨气的去除率可达到74.03%。本实验还进一步研究高铁酸盐在线去除硫离子的动力学研究,得到结果:当Na OH浓度为12mol/L时,S2-的去除率最高;当为5m A/cm2时,S2-的去除率最高;当S2-的初始浓度为0.08g/L时,Na2S的去除率最高;由Arrhenius方程换算得到,高铁酸盐氧化去除S2-的反应所需反应活化能Ea为36.617KJ/mol。
[Abstract]:With the development of urbanization and industrialization, more and more stench gases are produced in various industries. Because of the improvement of living standard, people have higher and higher demands on the environment. In some developed countries. The malodorous incident has reached more than half of all complaints, and has a rising trend. China's urbanization process is accelerating, but the urban planning, industrial structure is not reasonable. In recent years, there are more and more complaints about stench pollution. It is urgent to prevent and cure odor. In this paper, a new kind of green and environmental protection strong oxidant-ferrate is used for on-line oxidation with H _ 2S and NH _ 3. To achieve the purpose of deodorization. Deeply explore the key factors affecting ferrate deodorization, and on this basis optimize the operating parameters of the reactor. The main research work is as follows: first. The key factors of ferrate formation are studied. The results show that the effect of electrolytic experiment is better than that of single-chamber electrolytic cell. When the temperature is 65 鈩，

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