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进行了介质阻挡放电低温等离子体脱除伴有SO2的烟气中NO的研究,分别进行了直接等离子体脱硫脱硝和间接等离子体脱硫脱硝实验.在直接等离子体脱硫脱硝中,模拟烟气等混合气直接通入等离子体发生器,在反应器中电离分解NO以及和生成的高能电子、离子和自由基等离子体相互反应而进行脱除NO;间接等离子体脱硫脱硝中,模拟烟气连接在等离子体发生器出口与从反应器中产生出的等离子体发生氧化反应而进行脱除NO.结果表明,无论直接形式还是间接形式,脱硝效率都要比脱硫效率高,间接脱硫脱硝能够大大降低功率输入,节省能耗,具有重要的实际应用价值和意义.氨气的加入,有利于脱除效率的提升.

NO removal from coal-combustion flue gas with dielectric barrier discharge non-thermal plasma

Reducing NO from exhaust gas was studied with dielectric barrier discharge (DBD) non-thermal plasma (NTP) generator. The measures to increase DBD denitration efficiency were analyzed. The DBD generator was used in either a mode where flue gas was directed through the discharge zone (direct oxidation), or a mode where produced ozonized air was injected in the flue gas stream (indirect oxidation). Following the approach of increasing energy efficiency, it can successfully seek a measure to increase denitration efficiency and reduce reactor energy consumption, so as to realize the purpose of saving energy and actual value of DBDP-based denitration. The result showed that denitrification efficiency is higher than the efficiency of desulfurization under whether direct oxidation or indirect oxidation. And indirect oxidation can greatly reduce power consumption. The removal efficiency of NO can be improved by the addition of ammonia.