發(fā)布時(shí)間：2018-01-04 18:07

  本文關(guān)鍵詞：圓形孔口多孔板水力空化處理難降解廢水的試驗(yàn)研究　出處：《浙江工業(yè)大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 圓形孔口多孔板 空化效應(yīng) 對硝基苯酚 化工廢水 羥基自由基

【摘要】：利用空化效應(yīng)降解廢水是一種無需額外添加藥劑的技術(shù),符合綠色環(huán)保的環(huán)境理念,具有良好的應(yīng)用前景。然而對該技術(shù)降解廢水的影響因素的研究還不夠深入,此外空化效應(yīng)降解廢水的機(jī)理尚未明了,這為該水處理技術(shù)產(chǎn)業(yè)化帶來了一定的困難。本文主要針對水力空化效應(yīng)降解廢水的影響因素展開一系列試驗(yàn)研究,為其在廢水降解工程的推廣應(yīng)用及水力空化反應(yīng)器的優(yōu)化設(shè)計(jì)提供參考。本文首先選用自主研發(fā)的圓形孔口多孔板水力空化反應(yīng)器,進(jìn)行廢水降解的試驗(yàn)研究,試驗(yàn)研究了兩種廢水:一種是人工配制的對硝基苯酚(P-NP)廢水;另一種是取自杭州本地企業(yè)的化工廢水。探究了圓形孔口多孔板的幾何設(shè)計(jì)參數(shù)(孔口數(shù)量、孔口大小、孔口排列方式)以及降解反應(yīng)環(huán)境(處理時(shí)間,初始濃度、孔口流速、p H值、空化數(shù))分別與廢水降解率的關(guān)系。分析試驗(yàn)數(shù)據(jù)發(fā)現(xiàn),廢水降解率既受圓形孔口多孔板的幾何設(shè)計(jì)參數(shù)的影響,同時(shí)也受降解反應(yīng)環(huán)境的影響。其次,本文選用亞甲基蘭進(jìn)行羥自由基捕捉試驗(yàn),通過定量分析水力空化反應(yīng)器內(nèi)產(chǎn)生的羥自由基,探究羥自由基產(chǎn)量與水力空化技術(shù)降解廢水效果的關(guān)系。試驗(yàn)數(shù)據(jù)顯示增加羥基自由基量可提高廢水降解率。為了探究空化數(shù)對廢水降解效果的影響,試驗(yàn)過程中選用動(dòng)態(tài)數(shù)據(jù)采集系統(tǒng)實(shí)時(shí)采集多孔板后的液體內(nèi)部壓力,試驗(yàn)數(shù)據(jù)顯示降低空化數(shù)可以提高化工廢水降解率。
[Abstract]:The degradation of wastewater by cavitation effect is a kind of technology which does not need additional chemicals, and accords with the concept of environmental protection. However, the research on the influencing factors of the degradation of wastewater by this technology is not deep enough, and the mechanism of degradation of wastewater by cavitation effect is not clear. This brings some difficulties to the industrialization of water treatment technology. This paper mainly focuses on the factors affecting the degradation of wastewater by hydraulic cavitation effect. This paper provides a reference for its application in wastewater degradation engineering and the optimal design of hydraulic cavitation reactor. Firstly, the experimental study of wastewater degradation is carried out by using the circular orifice porous plate hydraulic cavitation reactor developed by ourselves. Two kinds of wastewater were studied: one was the artificial P-NPP wastewater; The other is chemical wastewater from local enterprises in Hangzhou. The geometric design parameters (number of holes, size of holes, orifice arrangement) and degradation reaction environment (treatment time) of circular perforated perforated plates were investigated. The relationship between the initial concentration, flow velocity and cavitation number) and the degradation rate of wastewater were analyzed. It was found that the degradation rate of wastewater was affected by the geometric design parameters of circular perforated plate. At the same time, it is also affected by the degradation reaction environment. Secondly, methylene blue is selected for hydroxyl radical capture test, through quantitative analysis of hydroxyl free radicals produced in hydraulic cavitation reactor. To explore the relationship between the production of hydroxyl radical and the effect of hydraulic cavitation technology on the degradation of wastewater. The experimental data show that increasing the amount of hydroxyl radical can increase the degradation rate of wastewater. In order to explore the effect of cavitation number on the degradation efficiency of wastewater. The dynamic data acquisition system was used to collect the internal pressure of the liquid after the porous plate was collected in real time. The experimental data showed that the degradation rate of chemical wastewater could be increased by reducing the cavitation number.
【學(xué)位授予單位】：浙江工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：X703

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