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

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

【摘要】：利用空化效應降解廢水是一種無需額外添加藥劑的技術,符合綠色環(huán)保的環(huán)境理念,具有良好的應用前景。然而對該技術降解廢水的影響因素的研究還不夠深入,此外空化效應降解廢水的機理尚未明了,這為該水處理技術產(chǎn)業(yè)化帶來了一定的困難。本文主要針對水力空化效應降解廢水的影響因素展開一系列試驗研究,為其在廢水降解工程的推廣應用及水力空化反應器的優(yōu)化設計提供參考。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器,進行廢水降解的試驗研究,試驗研究了兩種廢水: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計參數(shù)(孔口數(shù)量、孔口大小、孔口排列方式)以及降解反應環(huán)境(處理時間,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系。分析試驗數(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計參數(shù)的影響,同時也受降解反應環(huán)境的影響。其次,本文選用亞甲基蘭進行羥自由基捕捉試驗,通過定量分析水力空化反應器內(nèi)產(chǎn)生的羥自由基,探究羥自由基產(chǎn)量與水力空化技術降解廢水效果的關系。試驗數(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,試驗過程中選用動態(tài)數(shù)據(jù)采集系統(tǒng)實時采集多孔板后的液體內(nèi)部壓力,試驗數(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.
【學位授予單位】：浙江工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：X703

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