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高锰酸钾溶液脱除烟气中砷的实验研究
供稿: 赵毅;仇稳;杨丽娟;王佳男 时间: 2018-01-15 次数:

作者:赵毅仇稳杨丽娟王佳男

第一作者单位:华北电力大学环境科学与工程学院

摘要:针对煤燃烧过程中微量砷的排放对环境产生的危害,以KMnO4溶液作为吸收液,在自行设计的小型鼓泡反应器内进行了KMnO4溶液氧化脱除烟气中砷的实验。分别考察了KMnO4溶液初始浓度、吸收溶液初始pH、反应温度、SO2质量浓度、NO质量浓度、O2体积分数和CO2体积分数对砷脱除性能的影响。结果表明,当KMnO4溶液浓度为10 mmol/L、溶液pH为5、反应温度为50℃、烟气中砷的质量浓度为427μg/m3时,应用KMnO4溶液脱砷是可行的,且对砷的脱除效率可达到82.4%。

Abstract:In view of the environmental pollution and the harm on human health of trace arsenic during combustion, arsenic removal from simulated flue gas was studied in a self-designed bubbling reactor with KMnO4solution as the absorbents. The influence of KMnO4concentration, initial solution pH value, reaction temperature, SO2concentration, NO concentration, O2content and CO2content on the removal of arsenic were investigated respectively. The results show that the arsenic removal by using KMnO4solution is available. The efficiency of arsenic removal could reach by 82. 4% under the optimal conditions in which the initial concentration of arsenic was 427 μg/m3, KMnO4solution was 10 mmol/L, pH value was 5 and the reaction temperature was 50℃.

基金:国家863计划项目(2013AA065403);华北电力大学中央高校基金资助项目(2016XS114);

关键词:大气污染防治工程;模拟烟气;高锰酸钾;脱砷;

DOI:10.16186/j.cnki.1673-9787.2017.06.013

分类号:X701

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