【作者】 依成武；

【导师】 孙俊才；

【作者基本信息】 大连海事大学 ， 载运工具运用工程， 2004， 硕士

【摘要】 近年来,随着利用介质阻挡放电装置产生高浓度臭氧技术应用研究的不断深入,人们越来越关心介质阻挡强电离放电理论、放电装置结构性能及其优化设计参数等方面的研究状况。结合国家自然科学基金重点资助项目“高气压下强电场电离气体的方法及其应用的基础研究”（项目编号:60031001）和国家自然科学基金面上资助项目“超强电场放电离解气体分子及应用研究”（项目编号:69871002）,对高浓度臭氧产生装置的结构性能优化、影响因素以及介质阻挡强电离放电理论等方面进行了初步探讨。 本文对介质阻挡强电离放电理论进行了初步研究。通过研究氧气分子的离解过程和产生臭氧的等离子体化学反应过程,实现了用介质阻挡强电离放电的相关参数-电场强度（E/n）、电子能量（Te）来控制臭氧的浓度与分解,有效提高了臭氧产生浓度和产生效率。为今后臭氧的广泛应用提供了更有潜力的产生技术。 本文分别采用石英玻璃、硼硅酸盐玻璃、Al₂O₃陶瓷作为介质阻挡放电的电介质进行了臭氧产生试验,并依据大量的实验数据确定了外加电场激励电压、频率、气体压力、电介质厚度、放电间隙、冷却水温度、气体流量、放电功率密度、能流密度、电耗率等参数对臭氧产生浓度的影响规律,进行了高浓度臭氧产生装置设计参数的优化试验。通过采用高介电常数、高电阻率的Al₂O₃陶瓷电介质材料使介质阻挡强电离放电的放电间隙内的电子获得的平均能量大于10eV、电子浓度达到lO¹6/cm³、折合电场强度达到300Td以上。并实现了臭氧产生装置结构简单、紧凑小型化,模块叠加组合化。得到了放电间隙内的折合电场强度是影响臭氧浓度的主要参数的结论。通过采用减小放电间隙、有效冷却等手段可有效提高放电间隙中的折合电场强度,进而提高臭氧产生浓度。臭氧浓度达到137g/Nm³。、臭氧产生效率达到345g/kWh。更多还原

【Abstract】 In recent years, with the development of the research on the application of generating high concentration ozone by means of DBD, people concern more about the theoretical discussion of strong ionization discharge of dielectric barrier, the structure optimization of the discharge device and its design parameters. The structure optimization, the experimental studies of ozone generating equipment of high concentration, as well as the theoretical discussion of strong ionization discharge of dielectric barrier are done in this paper. This thesis is following the projects as follows: the key and General projects of National Natural Science Foundation of China, the "Studies on methods and applications of gas ionization with strong electric field at high pressure" （No. 60031001） and the "Studies on gas molecule ionization by ultra-strong electric field and its applications" （No.69871002）.The methods of strong ionization discharge of dielectric barrier and its plasma reaction process of ozone generation are discussed in this paper. The Plasma chemical reaction process of generating ozone are controlled by the parameters of dielectric barrier discharge （E/n、 Te）. Ozone concentration and produce efficiency raised largely. It is more potential ozone generating technology for extensive use in the future.In this paper, quartz glass, borosilicate glass and Al₂O₃ porcelain are respectively regarded as dielectric medium of ozone generators .Many experiments of generating ozone are carried out by them. And many influencing rules of the parameters ,such as exciting voltage of electric field in addition, frequency, gas pressure, dielectric medium thickness, discharging gap, cooling water temperature, gas flow, discharging power density, energy density and electric wastage rate etc, on the concentration of generating ozone are confirmed by a lot of experimental data. The optimized design of ozone generator is also done. The reduced field, as a main parameter, is increased and further done the ozone concentration with the methods as follows: the dielectric layers of high dielectric constant and high resistivity, the decrease of discharge gap and the cooling electrodes.Strong ionization discharge in discharge gap is gained with the reduced field （E/n） of 300Td, the average electron energy of 10 eV and the electron density of 10¹⁶/cm³.The ozone generator of miniaturization and modularization is developed with the ozone concentration of 137g/Nm3 and the producing efficiency of 345g/kWh for ozone device.更多还原