电晕放电耦合湿式吸收同时脱硫脱硝的实验研究

发布时间：2018-01-16 02:03

本文关键词：电晕放电耦合湿式吸收同时脱硫脱硝的实验研究　出处：《高电压技术》2016年02期 　论文类型：期刊论文

【摘要】：为了解决传统组合式燃煤烟气治理技术存在的系统复杂、投资费用高等问题,提出了电晕放电耦合湿式吸收同时脱硫脱硝的新方法。重点分析了电晕放电耦合湿式吸收同时脱硫脱硝的反应过程和协同效应,并考察了影响同时脱硫脱硝效果的关键因素。研究结果表明:SO2的脱除主要依靠中和反应,但电晕放电能进一步强化其吸收;电晕放电耦合湿式吸收能发挥协同效应,大大提高NOx脱除率;单独电晕放电过程和单独吸收过程的NOx脱除率分别为14.3%和7.7%,而电晕放电耦合湿式吸收过程的NOx脱除率则达到了58.2%,协同效应明显;随着液气体积比的增加,SO2和NOx的脱除都有所改善,但0.015的液气体积比已能满足当前脱硫脱硝的要求;吸收剂质量浓度对SO2的脱除影响不大,但随着吸收剂质量浓度的提高,NOx脱除率却显著上升;在20 k V放电电压下,质量浓度为0.3 g/L的Na OH加入后,NOx脱除率提高近30%。研究结论可以为进一步开展电晕放电耦合湿式吸收同时脱硫脱硝的应用基础研究提供理论依据。
[Abstract]:In order to solve the traditional combined flue gas treatment technology is complex, high investment cost, this paper puts forward a new method for simultaneous desulfurization and denitrification of corona discharge are analyzed. The coupling of wet absorption and reaction process of desulfurization and denitrification and the synergistic effect of corona coupling of wet absorption, and the effect of simultaneous desulfurization and denitrification effect is the key factors. The results show that the removal of SO2 mainly depends on the neutralization reaction, but the corona discharge can enhance the absorption; corona discharge coupling wet absorption can play a synergistic effect, greatly improve the removal rate of NOx; single corona discharge process and single absorption process of NOx removal rate were 14.3% and 7.7%, and the corona discharge coupling wet absorption process the removal rate of NOx reached 58.2%, obvious synergistic effect; with the increase of the ratio of liquid to gas volume, the removal of SO2 and NOx were improved, but 0.015 of the liquid The gas volume ratio has been able to meet the requirements of the current desulfurization denitration; little absorbent concentration effect on SO2 removal, but as the absorbent concentration increase, the removal rate of NOx was significantly increased in K; 20 V discharge voltage, the concentration of 0.3 g/L Na OH added, NOx improves the removal rate of 30%. in conclusion research for the further development of corona discharge coupling of wet absorption and providing theoretical basis for application of desulfurization and denitrification.

【作者单位】：浙江工商大学环境科学与工程学院;杭州市环境监测中心站;
【基金】：浙江省重大科技项目(2012C03003-2) 浙江省大学生科技创新项目(2014R408026)~~
【分类号】：X701
【正文快照】： 0引言1SO2和NOx由于煤炭的大量燃烧而已经成为我——国最主要的大气污染物。虽然目前采用湿法脱硫(wet flue gas desulfurization,WFGD)能够取得较高的脱硫率,但由于烟气中NOx的90%以上为NO,所以湿法吸收很难有效脱除NOx。要实现高效的NOx脱除就必须借助于选择性催化还原(sele

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