本文選題：乳狀液膜 + 煙氣脫硝��； 參考：《華北理工大學(xué)》2017年碩士論文

【摘要】：氮氧化物是造成大氣污染的主要原因之一,會嚴重危害人體健康,破壞生態(tài),延緩社會發(fā)展,其主要來源為化石燃料燃燒后所產(chǎn)生的煙氣。乳狀液膜分離方法作為一種創(chuàng)新型的分離手段,擁有簡單高效、膜相可循環(huán)使用、無二次污染等優(yōu)勢,在環(huán)境保護以及污染控制等領(lǐng)域應(yīng)用十分廣泛。為開發(fā)新的煙氣脫硝工藝,將煤油用作膜溶劑,L-113A用作表面活性劑,NaOH溶液用作內(nèi)相液,構(gòu)建了煙氣脫硝乳狀液膜體系。探究了表面活性劑種類及濃度、油內(nèi)比、乳水比、制乳轉(zhuǎn)速和攪拌速度等條件對脫硝效率的影響情況,并依據(jù)正交實驗結(jié)果選擇出了最適參數(shù)。結(jié)果表明,對于煙氣中NO_2的脫除,其基本原理為NO_2可與內(nèi)相液NaOH反應(yīng)而被消耗,當表面活性劑的濃度為2%(v/v),油內(nèi)比為4:6,乳水比為1:4,制乳轉(zhuǎn)速為3000 r/min時,NO_2的去除率可以達到96.65%;對于煙氣中NO的脫除,先用氧化劑將其氧化為NO_2,再進行吸收,當氧化劑H_2O_2濃度為2 mol/L,內(nèi)相液濃度為0.125 mol/L,乳水比為1:5,外相液p H為9時,NO吸收效率可以達到85.96%。對乳狀液膜法煙氣同時脫硫脫硝體系進行了初步的構(gòu)建。液膜的體系構(gòu)成為煤油為膜溶劑,L-113A為表面活性劑,NaOH溶液為內(nèi)相液,結(jié)果表明,此體系在最適參數(shù)下,脫硫率可大于99%,脫硝率為88.59%,效果理想。通過比較探究了加熱破乳、離心破乳和高壓靜電破乳的相應(yīng)條件改變對破乳效果的影響,結(jié)果表明,在最佳條件下,三種方法的破乳率分別是83.3%、45.9%和97.3%。
[Abstract]:Nitrogen oxide is one of the main causes of air pollution, which will seriously harm human health, destroy ecology and delay the development of society. The main source of nitrogen oxide is the flue gas produced by fossil fuel combustion. As an innovative separation method, emulsion liquid membrane separation method has the advantages of simple and high efficiency, membrane phase recycling and no secondary pollution. It is widely used in the field of environmental protection and pollution control. In order to develop a new flue gas denitrification process, kerosene was used as membrane solvent, L-113A as surfactant and NaOH solution as inner phase liquid, and the emulsion liquid membrane system of flue gas denitrification was constructed. The effects of the kinds and concentrations of surfactants, the ratio of oil to oil, the ratio of milk to water, the speed of milk preparation and the speed of stirring on denitrification efficiency were investigated. The optimum parameters were selected according to the results of orthogonal experiment. The results show that for the removal of NO-2 from flue gas, the basic principle is that NO-2 can be consumed by reaction with the inner phase liquid NaOH. When the concentration of surfactant is 2% (v / v), the ratio of oil to oil is 4: 6, the ratio of milk to water is 1: 4, and the speed of milk preparation is 3000 r/min, the removal rate of no _ 2 can reach 96.65%. When the concentration of H _ 2O _ 2 is 2 mol / L, the concentration of internal phase is 0.125 mol / L, the ratio of milk to water is 1: 5, the absorption efficiency of no can reach 85.96 when the concentration of H _ 2O _ 2 is 2 mol / L, the ratio of milk to water is 1: 5, and the concentration of external phase is 9%. The system of simultaneous desulfurization and denitrification of flue gas by emulsion liquid membrane method was preliminarily constructed. The liquid membrane system is composed of kerosene as the membrane solvent and L-113A as the surfactant NaOH solution as the inner phase liquid. The results show that the desulfurization rate can be greater than 99 and the denitrification rate is 88.59 and the effect is ideal under the optimum parameters. The effects of the corresponding conditions of heating demulsification, centrifugal demulsification and high voltage electrostatic demulsification on the demulsification effect were compared. The results showed that the demulsification rates of the three methods were 83.3% and 97.3% respectively under the optimum conditions.
【學(xué)位授予單位】：華北理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：X701;TQ028.8

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