排序方式: 共有15条查询结果,搜索用时 15 毫秒
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Shijie LI 《等离子体科学和技术》2022,24(1):15504
Dielectric barrier discharge (DBD) has been extensively investigated in the fields of environment and energy, whereas its practical implementation is still limited due to its unsatisfactory energy efficiency. In order to improve the energy efficiency of DBD, a novel double dielectric barrier discharge (NDDBD) reactor with high field emission and secondary electron emission was developed and compared with traditional DDBD (TDDBD) configuration. Firstly, the discharge characteristics of the two DDBD reactors were analyzed. Compared to TDDBD, the NDDBD reactor exhibited much stronger discharge intensity, higher transferred charge, dissipated power and gas temperature due to the effective utilization of cathode field emission and secondary electron emission. Subsequently, toluene abatement performance of the two reactors was evaluated. The toluene decomposition efficiency and mineralization rate of NDDBD were much higher than that of TDDBD, which were 86.44%–100% versus 28.17%–80.48% and 17.16%–43.42% versus 7.17%–16.44% at 2.17–15.12 W and 1.24–4.90 W respectively. NDDBD also exhibited higher energy yield than TDDBD, whereas the overall energy constant ${k}_{{\rm{overall}}}$ of the two reactors were similar. Finally, plausible toluene decomposition pathway in TDDBD and NDDBD was suggested based on organic intermediates that generated from toluene degradation. The finding of this study is expected to provide reference for the design and optimization of DBD reactor for volatile organic compounds control and other applications. 相似文献
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气体放电条件下负载光催化剂陶瓷的实验研究 总被引:7,自引:0,他引:7
选取A、B两类陶瓷材料作为负载光催化剂的载体.通过对陶瓷材料性质的实验研究并将其作为管线式气体放电填充床反应器的填充料对含苯气体进行处理,得出了不同粒径的陶瓷载体在高电压下对苯转化率的影响规律,高孔隙率的陶瓷载体对苯的转化率较高,高孔隙率的陶瓷负载光催化剂后对较高浓度苯气体的转化率达到94.9%. 相似文献
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脉冲袋式除尘器喷吹气流的数值模拟 总被引:3,自引:0,他引:3
借助计算流体动力学方法,采用二维非稳态流动数学模型,对脉冲袋式除尘器滤袋内喷吹气流的压力分布进行了数值模拟.通过与喷吹压力实验值对比,验证了数值模拟结果的可靠性,表明可将数值模拟作为脉冲喷吹的研究方法.在用不同时刻的滤袋壁面压力分布图来表示的模拟结果中显示,随着气流向袋底方向运动,滤袋壁面压力的最大值不断下移,距袋口0.5 m处,峰值压力和压力上升速率都达到最大值. 相似文献
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山东省某环保建材粉煤灰标砖工程,原料输送方式为皮带机输送,布置两条皮带机输送线,呈对称分布,皮带机规格型号相同。机架长度1100m,带速20m/s,带宽B=l00000mm,皮带槽型底面距地面垂直距离2.00m。由于当时历史条件限制,环保要求低,设计标准低,甚至有些地方没有烟气治理措施,物料在输送过程中,产生大量粉尘,严重污染环境,在转运点、落料处尤为突出。粉尘浓度严重超标,平均几十~几百mg/m3,个别点粉尘浓度达102200mg/m3,已远远超出国家标准<100mg/m3要求,致使运行人员难以监控设备。与此同时,造成传统的除尘系统设备磨损严重,电气绝缘水平下降,给安全生产和职工的身心健康及环境带来极大的危害,亟待整治。 相似文献
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三电极电除尘器电极配置优化实验研究 总被引:4,自引:0,他引:4
对三电极电除尘器电极配置的几何参数进行了优化实验研究,用边界探针测量了收尘极和辅助电极表面的电流密度分布,分析了电场特性随极距、放电极间距及辅助电极与放电极间距三个主要几何参数的变化规律,给出了强化电场收尘性能的三电极配置最佳几何参数。 相似文献