| In recent years, with rapid promotion of china’s economic strength and expansion of industrial, the industry’s impact on the environment also increasingly prominent in our country, the environmental pollution problems are increasingly serious. Across the country,especially in Beijing, Shanghai, Guangdong and other developed areas of haze days rise year by year, PM2.5 has become the focus of national attention. The people are also put forward higher requirements on the living environment quality, and as the primary precursors of PM2.5 content of Volatile Organic gas(VOCs-Volatile Organic come) caused emissions is rising in recent years and now the fog is serious, one of the main reasons is air pollution problems.Therefore, national and local policies and regulations strictly on the formulation of environmental protection, Guangdong, Beijing, Shanghai, Tianjin have made the local of VOCs emissions standards, and the mandatory for printing the volatile organic gas emission charges from 2016, especially for not installed organic gas processing facilities at the end of the enterprise increased regulation. Therefore, research on emissions of volatile organic gas control and purification degradation of topic have great importance and the urgency of the current.Through the judgment of the process characteristics of printing industry, the paper will choose print which is most commonly used solvent ethyl acetate, isopropanol which is purification experiment gas as the goal of this organic gas. Through this organic gas purification experiment for the ethyl acetate and isopropanol, we want to verify the feasibility of purification method of dielectric barrier strong ionization discharge of volatile organic gas.The experiment that application of dielectric barrier strong ionization and discharge high energy discharge method, high strength, high concentrations of electrons, made long bond break molecular bonds between volatile organic compounds and activated the gas oxygen,nitrogen molecules, water molecules by plasma generator in the circulation reaction chamber.Then it generated the hydroxyl radical(·OH), HO2,O + and so on a series of free radical ion state, direct reaction with volatile organic gas and created stable short molecular organic compounds, in order to achieve the purpose of the organic gas purification.This experiment discuss that how voltage, current, frequency and other electrical parameters to impact organic gas purification, and how process parameters of the target gas concentration, gas flow rate, gas temperature, the humidity of atmosphere gas each link of single factor for the effect of strong ionization to impact efficiency of the organic gas purification. By all the laws of single factor experiment, we design the interaction of multi-factors orthogonal experiments, analysis the factors of primary and secondary, in orderto get to the optimal combination of the organic gas purification efficiency is higher, then verified. Experiment show that dielectric barrier strong ionization discharge technology can effectively control low concentration VOCs, with high frequency and high voltage the experiment get high degradation efficiency of VOCs which below 1000mg/m3 and the gas flowing velocity below 0.6 m3/h.At the same time, it has some advantages, such as wide application scope of high efficiency, low energy consumption.Finally, the paper discusses current organic gas purification at the end of the printing all kinds of purification technology, through the analysis of the end of the printing industry organic gas purification of laws, regulations and policies on influence of the market and the analysis of the organic gas purification technology market share both at home and abroad, we will hold an optimistic attitude for the market prospect of strong ionization technology. |
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