【摘要】：為了研究燃煤煙氣成分對低溫等離子體氧化元素汞的影響,以石英玻璃管為阻擋介質(zhì),內(nèi)插不銹鋼棒為高壓放電極,利用交流高壓放電產(chǎn)生低溫等離子體強(qiáng)化模擬煙氣中Hg~0氧化.研究輸入能量和煙氣成分對模擬煙氣中Hg~0形態(tài)轉(zhuǎn)化與協(xié)同脫硫脫硝的影響規(guī)律.結(jié)果表明,初始時Hg~0氧化率隨輸入能量增大而提高,原因是模擬煙氣中O_2分解產(chǎn)生的O自由基數(shù)目增多,但輸入能量過大會促使模擬煙氣中N_2分解,生成NO并消耗O自由基,導(dǎo)致Hg~0氧化率下降.煙氣中O_2和CO_2含量增大,分解產(chǎn)生的自由基O數(shù)量增多,有利于Hg~0氧化反應(yīng).低溫等離子可將NO和SO_2分解成N2和S,同時產(chǎn)生能夠促進(jìn)Hg~0氧化的O自由基,因此低溫等離子促進(jìn)NO和SO_2氧化Hg~0的同時可實(shí)現(xiàn)脫硫脫硝的目的.
[Abstract]:In order to study the effect of coal smoke composition on elemental mercury oxide in low temperature plasma, quartz glass tube was used as barrier medium and stainless steel rod was inserted as high pressure discharge pole. Hg~0 oxidation in simulated flue gas was enhanced by low temperature plasma generated by AC high voltage discharge. The effects of input energy and flue gas composition on Hg~0 morphological transformation and synergistic desulphurization and denitrification in simulated flue gas were studied. The results show that the oxidation rate of Hg~0 increases with the increase of input energy at the beginning, because the number of O free radicals produced by the decomposition of O _ 2 in simulated flue gas increases, but the excessive input energy promotes the decomposition of N _ 2 in simulated flue gas. NO was formed and O free radical was consumed, which resulted in the decrease of Hg~0 oxidation rate. The content of O _ 2 and CO_2 in flue gas increased, and the amount of free radical O _ 2 increased, which was beneficial to the oxidation of Hg~0. Low temperature plasma can decompose NO and SO_2 into N2 and Sand produce O free radical which can promote Hg~0 oxidation. So low temperature plasma can promote NO and SO_2 oxidation of Hg~0 and realize the purpose of desulfurization and denitrification at the same time.
【作者單位】： 東南大學(xué)能源熱轉(zhuǎn)換及其過程測控教育部重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金資助項(xiàng)目(51076030,51376046) 中央高校基本科研業(yè)務(wù)費(fèi)專項(xiàng)資金資助項(xiàng)目 江蘇省研究生科研創(chuàng)新計(jì)劃資助項(xiàng)目(KYLX_0184,CXZZ13_0093,KYLX_0115)
【分類號】：X701

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