论文总字数：25129字

摘 要

随着工业化进程的推进，水污染引发的环境问题对人类健康和生存条件的威胁日益严重。印染废水是一种有机物含量高，色度高，难生化降解，成分复杂的废水，被公认为是最难治理的主要有害废水之一。传统处理印染废水常用的方法主要有物理化学法和生物法等，这些方法有药耗量大，污泥量极大，成本高，处理效果不佳等缺点。低温等离子体污水处理技术由于对传统方法难治理的水中污染物有较好的处理效果，而且具有处理效率高，反应迅速，无二次污染，成本低等优点，越来越受到人们的广泛重视。本文通过气液两相介质阻挡放电产生低温等离子体对印染废水进行处理，研究了电源种类、电源电压幅值、电源频率等参数对于处理效果的影响，并给出了最优放电条件。

为了对印染废水处理效果进行实验研究，本文搭建了气液两相介质阻挡放电实验系统。电极结构采用针—板电极，高压针电极通过石英玻璃片紧压在塑料皿上，低压板电极埋在溶液中。实验中采用高频电源作为激励，通过改变电源电压幅值分别在19.5kV—21kV，电源频率分别在5kHz—7kHz。利用Tektronix TDS 2014B示波器记录了实验过程中的电压电流波形进行电气特性分析，利用Canon EOS 6D照相机采集实验中的发光图像和处理后溶液的图片，通过对处理后溶液图片的RGB色度分析和对比表征处理效果，为深入分析提供数据支持。

在高频电源激励下，为了得到酸性红溶液的最佳处理条件和处理效果，将不同浓度溶液在不同电压和电源频率下进行处理，对比不同条件下的溶液处理时间和处理效果，得到了不同浓度溶液的最佳处理条件。同时，也对实验中发现的电流波形不对称等现象进行了更深层次的探讨。为了对比微秒电源和高频电源激励下的废水处理效果，本文采集了微秒电源气液两相放电的发光图像和电压电流波形，通过数据处理得到高频电源和微秒电源激励下放电过程的瞬时功率，比较了两种电源处理下的废水处理效果，并分析了两种电源处理效果差异的原因。

本文的研究得到了不同浓度下印染废水的最佳处理条件，为等离子体印染废水处理提供了参考和依据。

关键词：气液两相 介质阻挡放电 印染废水 电压幅值 电源频率

Abstract

With the progress of industrialization, environmental problems caused by water pollution have become increasingly serious threats to human health and living conditions. Printing and dyeing wastewater is a kind of wastewater with high content of organic matter, high chromaticity, difficult to biodegrade and complicated composition. The traditional methods used to treat printing and dyeing wastewater mainly include physical and chemical methods and biological methods. These methods have the disadvantages of large drug consumption, large amount of sludge, high cost and poor treatment effect. Low temperature plasma wastewater treatment technology with the traditional method is difficult to control of water pollutants has good treatment effect, and has high processing efficiency, reflect fast, no secondary pollution, low cost advantages, more and more get the wide attention of people. Based on the gas liquid two phase dielectric barrier discharge to produce low temperature plasma was carried out on the printing and dyeing wastewater treatment, the study of the variety of power supply, power supply voltage amplitude, power supply for the effects of the processing parameters such as frequency and the optimal discharge conditions is presented.

In order to study the effect of printing and dyeing wastewater treatment, an experimental platform for gas-liquid two-phase dielectric barrier discharge was set up. The electrode structure adopts needle - plate electrode. The high - voltage needle electrode is pressed tightly on the plastic plate through quartz glass plate, and the low - pressure plate electrode is buried in solution. In the experiment, the high-frequency power supply was used as the excitation. By changing the voltage amplitude of the power supply at 19.5kv -- 21kV, and the power frequency at 5kHz -- 7kHz, respectively. Using Tektronix TDS 2014B oscilloscope recorded the experimental process of voltage and current waveform analysis of electric property, using the Canon EOS 6 d camera acquisition experiments of luminous images and images after processing solutions, through to the image after processing solution RGB chroma analysis and comparative characterization of treatment effect, provide data support for further analysis.

Incentives in the high frequency power supply, in order to get the optimum processing condition and processing effect of acid red solution, the solutions of different concentration under different voltage and power frequency for processing, contrast different conditions of solution treatment time and treatment effect, the optimum processing conditions of the different concentration solution. At the same time, the asymmetry of the current waveform found in the experiment is also discussed. To contrast microseconds wastewater treatment effect of excitation power supplies and high frequency power supply, this paper collected microseconds power of gas liquid two phase discharge light image current and voltage waveform, high frequency power supply is obtained by data processing and microseconds power incentive to devolve instantaneous power of the process, compares the two kinds of power under the treatment of waste water treatment effect, and analyzes the reason for the difference between the two kinds of power treatment effect.

The optimum treatment conditions of printing and dyeing wastewater with different concentration were obtained, which provided reference and basis for plasma printing and dyeing wastewater treatment.

Key words: Gas-liquid mixture；Dielectric barrier discharge；Printing and dyeing wastewater；Voltage amplitude；Power frequency

目 录

摘 要 1

Abstract II

第一章 绪论 1

1.1 课题研究背景 1

1.2 介质阻挡放电简述 2

1.3 气液两相DBD产生方式 3

1.4 气液两相DBD应用 4

1.5 国内外研究现状 5

1.6 本文主要研究内容 7

第二章 气液两相DBD废水处理实验系统搭建及测量方法 9

2.1 实验系统结构组成 9

2.2 印染废水溶液配制 10

2.3 气液两相DBD放电特性诊断方法 11

2.4 溶液处理效果诊断方法 12

2.5 小结 12

第三章 高频电源驱动下的电气特性及处理效果 14

3.1 实验条件选择 14

3.2 不同条件对电气特性的影响 14

3.2.1 不同电压对电气特性的影响 15

3.2.2 不同频率对电气特性的影响 15

3.3 电源电压幅值对于处理效果的影响 18

3.4 电源电压频率对于处理效果的影响 19

3.5 处理时间对于处理效果的影响 21

3.6 不同污染物浓度下的最优处理条件 22

3.7 小结 24

第四章 微秒电源驱动下的电气特性及处理效果 26

4.1 脉冲与高频驱动下电气特性的比较与分析 26

4.2 小结 29

第五章 结论 30

参考文献 32

致 谢 34

第一章 绪论

1.1 课题研究背景

印染废水是工业生产中对棉、麻、化学纤维等纺织品进行染色加工后排出的废水。印染废水水量大且含有大量包括染色剂、催化剂在内的污染物。一方面，工业上每染色加工一吨纺织品就需要消耗100~200吨水资源，这些水资源80%~90%会成为废水；另一方面，有统计资料显示，全世界每年生产超过60万吨以上的工业染料，其中衣服染色等过程会消耗50%以上的染料，而在染色加工过程中，所用的染料并不能被全部吸收，又有10%—20%会混在废水中排出。

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