發(fā)布時(shí)間：2018-01-05 12:11

  本文關(guān)鍵詞：Fenton試劑同時(shí)脫硫脫硝的理論和實(shí)驗(yàn)研究　出處：《上海電力學(xué)院》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： SO2 NO Fenton試劑 反應(yīng)動(dòng)力學(xué) 數(shù)學(xué)模型 離子色譜法

【摘要】：SO2和NOx是燃煤電廠排放的主要煙氣污染物，大量的排放勢(shì)必會(huì)加劇當(dāng)前存在的一系列環(huán)境問題，如酸雨、光化學(xué)煙霧。為了降低SO2的排放，燃煤電廠多采用石灰石-石膏濕法脫硫技術(shù)（WFGD），該技術(shù)比較成熟、可靠而且脫硫效率高，已得到廣泛的應(yīng)用�？刂芅Ox的排放則主要采用選擇性催化還原技術(shù)（SCR）和非選擇性催化還原技術(shù)（SNCR）。前者存在占地面積大、系統(tǒng)復(fù)雜、投資高和催化劑易中毒等缺點(diǎn)；后者存在脫硝效率較低等不足。因此，如何將脫硫和脫硝裝置合二為一，開發(fā)一種新型、高效、環(huán)境友好型、時(shí)脫硫脫硝技術(shù)越來越受到關(guān)注。 本文基于國內(nèi)外對(duì)高級(jí)氧化技術(shù)（AOPs）在污染物領(lǐng)域的研究，提出利用Fenton試劑（Fe2+/H2O2）同時(shí)脫除煙氣中的SO2和NO的方法。首先，對(duì)Fenton試劑氧化吸收NO的反應(yīng)動(dòng)力學(xué)進(jìn)行了研究，計(jì)算得出了NO濃度和H2O2濃度的反應(yīng)級(jí)數(shù)、反應(yīng)活化能、指前因子等相關(guān)動(dòng)力學(xué)參數(shù)，建立了Fenton試劑氧化吸收NO的數(shù)學(xué)模型。其次，進(jìn)行了Fenton試劑同時(shí)脫除SO2和NO實(shí)驗(yàn)，研究了H2O2濃度、NO濃度、反應(yīng)溫度、O2體積分?jǐn)?shù)等相關(guān)因素對(duì)NO和SO2脫除效率的影響，，采用離子色譜法對(duì)反應(yīng)產(chǎn)物進(jìn)行了分析，得出反應(yīng)路徑和反應(yīng)機(jī)理。最后，利用響應(yīng)曲面法建立預(yù)測(cè)模型，考察各因素交互作用對(duì)NO脫除效率的影響。 以Fenton試劑為基礎(chǔ)，發(fā)展形成了多種類Fenton試劑，納米Fe3O4/H2O2試劑就是其中的一種。本文還就納米Fe3O4/H2O2試劑氧化吸收NO進(jìn)行了實(shí)驗(yàn)研究，分析H2O2濃度、NO濃度、反應(yīng)溫度等相關(guān)因素對(duì)其吸收速率的影響，簡單分析了該技術(shù)的反應(yīng)機(jī)理。
[Abstract]:SO2 and NOx are the main flue gas pollutants emitted by coal-fired power plants. A large number of emissions are bound to aggravate a series of environmental problems, such as acid rain, photochemical smog. In order to reduce the emission of SO2. The wet limestone gypsum desulfurization technology is widely used in coal-fired power plants. The technology is mature, reliable and has high desulphurization efficiency. The control of NOx emissions is mainly by selective catalytic reduction (NOx) and non-selective catalytic reduction (NOx). The former has a large area and complex system. The disadvantages of high investment and easy poisoning of catalyst; Therefore, how to combine desulphurization and denitrification unit into one, develop a new type, efficient, environment-friendly, desulfurization and denitrification technology has been paid more and more attention. This paper is based on the research of advanced oxidation technology (AOPs) in the field of pollutants at home and abroad. A method of simultaneous removal of SO2 and no from flue gas by using Fenton reagent (Fe _ 2 / H _ 2O _ 2) was proposed. The kinetics of oxidation and absorption of no by Fenton reagent was studied. The reaction order, activation energy and preexponential factor of no concentration and H2O2 concentration were calculated. A mathematical model for the oxidation and absorption of no by Fenton reagent was established. Secondly, the simultaneous removal of SO2 and no by Fenton reagent was carried out, and the concentration of no and reaction temperature were studied. The effects of O2 volume fraction on the removal efficiency of no and SO2 were analyzed by ion chromatography, and the reaction path and reaction mechanism were obtained. A prediction model was established by using response surface method to investigate the effect of interaction of various factors on the removal efficiency of no. Based on Fenton reagent, a variety of Fenton reagents have been developed. Nano Fe3O4/H2O2 reagent is one of them. The oxidation and absorption of no by nano Fe3O4/H2O2 reagent are studied experimentally, and the concentration of no in H2O2 is analyzed. The effect of reaction temperature and other related factors on the absorption rate was analyzed.
【學(xué)位授予單位】：上海電力學(xué)院
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：X773

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