發(fā)布時(shí)間：2018-06-25 23:06

  本文選題：渦流 + 空化�。� 參考：《北京化工大學(xué)》2015年碩士論文

【摘要】：印染廢水由于其特殊性,具有組分復(fù)雜、pH波動(dòng)大、有機(jī)物含量高、色度深、毒性強(qiáng)、難降解等特性,屬于難處理的工業(yè)廢水之一。近年來,隨著工藝的發(fā)展、新型染料和助劑的研制、應(yīng)用以及排放標(biāo)準(zhǔn)的日益嚴(yán)格,致使傳統(tǒng)的物理、化學(xué)、生物法難以滿足目前水處理的要求。水力空化技術(shù)由于其反應(yīng)條件溫和、能耗低、能有效降解有機(jī)物、無二次污染,受到人們的廣泛關(guān)注。本文通過研究發(fā)現(xiàn)：渦流裝置對曝氣量要求較低,但是對曝氣方式、形成氣泡的直徑以及在流體中分布情況要求較為嚴(yán)格；射流器空化效率較低,但其獨(dú)有的曝氣方式和渦流裝置空化效應(yīng)形成互補(bǔ),有一定的協(xié)同作用。本文首次將射流器和渦流裝置進(jìn)行有機(jī)結(jié)合并運(yùn)用于水處理中,以亞甲基藍(lán)模擬印染廢水,研究了射流-渦流的強(qiáng)化機(jī)制,實(shí)驗(yàn)研究了不同空化裝置中輸入壓力、溫度和曝氣量對裝置空化效率的影響,以及廢水中鹽分和固體顆粒對空化效率的影響,并得到以下結(jié)論：1、輸入壓力(P)、體系溫度(T)、曝氣量(G/L)對射流器和聯(lián)用裝置的影響規(guī)律相同,具有雙重影響；三者對于不同裝置影響強(qiáng)度不同,但對射流器和聯(lián)用裝置影響最大的都是輸入壓力；射流器的最優(yōu)條件為：P=0.1 MPa、T=40℃.G/L=0.05;渦流裝置的最優(yōu)條件：P=0.3MPa、T=40℃、 G/L=0.03。2、亞甲基藍(lán)溶液經(jīng)射流處理后,亞甲基藍(lán)的去除率為77.6%,但不能被降解；聯(lián)用裝置對亞甲基藍(lán)的去除率高達(dá)94.6%,并能將其降解為小分子物質(zhì)；聯(lián)用裝置相對于射流器空化效果有明顯的提高,射流器和渦流裝置具有一定的協(xié)同作用,但由于結(jié)構(gòu)參數(shù)的差異,無法將強(qiáng)化效果充分發(fā)揮,因此,裝置結(jié)構(gòu)參數(shù)有待進(jìn)一步優(yōu)化。3、廢水中的鹽分對裝置空化效果有抑制作用；一定粒徑和含量的固體顆粒對裝置空化效果有強(qiáng)化作用；當(dāng)兩者共存時(shí),鹽分占主導(dǎo)作用。
[Abstract]:Because of its particularity, printing and dyeing wastewater is one of the refractory industrial wastewater because of its complex pH fluctuation, high organic content, deep chroma, strong toxicity and difficult to degrade. In recent years, with the development of technology, the development and application of new dyes and auxiliaries, as well as the increasingly stringent emission standards, the traditional physical, chemical and biological methods are difficult to meet the current requirements of water treatment. Because of its mild reaction conditions, low energy consumption, effective degradation of organic matter and no secondary pollution, hydraulic cavitation technology has received extensive attention. In this paper, it is found that the swirl device requires lower aeration rate, but for aeration mode, the diameter of bubble formation and its distribution in fluid are strict, and the cavitation efficiency of jet apparatus is relatively low. However, its unique aeration mode and vortex cavitation effect complement each other and have a certain synergistic effect. In this paper, an organic combination of jet and eddy current device is used in water treatment for the first time, and methylene blue is used to simulate printing and dyeing wastewater. The enhancement mechanism of jet eddy current is studied, and the input pressure in different cavitation devices is experimentally studied. The effect of temperature and aeration rate on cavitation efficiency, and the effect of salt and solid particles in wastewater on cavitation efficiency. The following conclusions are obtained: 1: 1, input pressure (P), system temperature (T), and aeration rate (G / L) have the same effect on the jet and the combined device, and have double effects on the different devices. However, the most important influence on both the jet device and the combined device is the input pressure. The optimal conditions of the jet device are as follows: 1 / P0. 1 MPaI / T 40 鈩，

本文編號(hào)：2067918