检索结果-南通市图书馆

Experimental Study of the recovery Times of Spark Gap Switch with Different gases

Plasma Science and Technology 2008年第3期10卷 379-382页

作者：殷毅刘金亮钟辉煌冯加怀 College of Optoelectric Science and Engineering National University of Defense Technology Changsha 410073 China

A two-pulse method is used to determine the insulation recovery time of the gas spark gap switch with different types of gas applied in a high power accelerator with a water dielectric pulse forming line. At the breakdown voltage of 450 kV, with the vacuum diode voltage of about 200 kV, and a current of 30 kA, recovery characteristics of H2, N2, SF6 were studied. The recovery percentages of the gas breakdown voltage and vacuum diode voltage were determined. The results show that hydrogen has the best recovery characteristics. At a pulse interval of 8.8 ms, the recovery percentages of both the gas breakdown voltage and vacuum diode voltage for hydrogen exceed 95%. For SF6 and N2 with an interval of 25 ms and 50 ms respectively, a 90% voltage recovery was obtained. The experiments also proved that the repetitive rate of the high power accelerator with a pulse forming line is mainly restricted by the gas switch repetitive rate; the recovery percentages of the vacuum diode voltage are limited by the recovery percentages of the gas switch breakdown voltage. The hydrogen switch can be employed for a high repetitive rate-high power accelerator with a pulse forming line.

关键词： high current electron accelerator hydrogen switch gas recovery repetitive rate

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Thermodynamic analysis of improvement of converter gas by injecting pulverized coal into vaporization cooling flue

引用

Journal of Iron and Steel Research International 2018年第1期25卷 65-71页

作者： Jian-an Zhou Xue-kai Jiang Jian-bo Xie Hua Zhang Lei Li Bao Wang Hong-wei Ni State Key Laboratory of Refractories and Metallurgy WuhanUniversity of Science and Technology Wuhan 430081Hubei China Key Laboratory of Ferrous Metallurgy and ResourcesUtilization Ministry of Education Wuhan Universityof Science and Technology Wuhan 430081 Hubei China Guangxi Liuzhou Iron and Steel Group Co. Ltd.Liuzhou 545002 Guangxi China

In order to improve the calorific value and the recovery yield of converter gas during the steelmaking process, a novel and thermodynamically admissible process was proposed. This method involved injecting pulverized coal into the vaporization cooling flue of a converter, and the approach was developed based on an industrial 30 t converter. The effects of temperature, O2 content, and the volumetric ratio of CO to CO2 on the conversion of the mixed components of gas were analyzed using thermodynamic calculations. Furthermore, the effect of the injection rate on the quality and quantity of gas was investigated. The results show that the O2 and CO2 components of flue gas decrease as the injection rate increases, whereas the CO and H2 components synchronously increase. With the injection rate of 30 kg min-1, the 02 and CO2 components of the gas decreased by 64.12 and 41.19%, respectively, while the CO and H2 increased by 20.09 and 236.84%, respectively, and the recovery time of gas increased by 11.61%, compared to non-injection.

关键词： Converter gas recovery Vaporization cooling flue CO2 Pulverized coal

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Wastewater treatment in 2050:Challenges ahead and future vision in a European context

引用

Environmental Science and Ecotechnology 2020年第2期2卷 72-75页

作者： Ana Soares Cranfield Water Science Institute Cranfield UniversityCranfieldMK430ALUK

*** The current state of the wastewater industry is one of *** Europe,in the last 2 decades,we have seen a significant improvement on river water quality after implementation of the Urban Waste Water Treatment European Directive(91/271/EEC)[1],and the European Water Framework Directive[2].Up to 97% of the population have now access to safely managed wastewater treatment services.

关键词： Green housegas emissions gas recovery anMBR Nitrification Full-scale implementation Water Industry

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：