空分设备冷箱鼓胀变形的发生和预防

空分设备冷箱漏液,必须扒砂。介绍了扒砂过程中发生的冷箱鼓胀变形事故,分析了事故的原因和今后的防范措施,提出了安全扒砂的建议。     

信息系统中基于角色的访问控制

在一个企业级信息系统中,用户访问信息系统中资源的管理是一个复杂问题,直接对用户授权的管理模式不能适应企业的发展。文中讨论了基于角色的访问控制管理方式和ORACLE数据库管理系统的安全性策略,分析了信息系统中访问控制管理的需求,提出了对信息系统应用功能访问和数据库访问的分开控制管理,通过应用系统角色建立数据库用户和应用系统功能之间的关联,从而构成信息系统的访问控制管理策略。给出了基于角色的访问控制实现,并应用于设备信息管理系统中,实现了用户访问控制动态管理。     

Modeling and simulation of an oxy-fuel combustion boiler system with flue gas recirculation

In this paper, a mathematical model of an oxy-fuel combustion boiler system with flue gas recirculation is investigated. The reduction of CO₂ emission from coal-fired power plants is an important research issue in alleviating the global warming. The entire dynamics are decomposed in two main parts; fire-side dynamics and water-side dynamics. The fire-side dynamics consist of the mass and energy balance equations in the furnace (combustion process) and the flue gas dynamics represented by the mass balance equations of five gases (O₂, CO₂, SO₂, H₂O and NO₂). The water-side dynamics include a drum pressure equation and a steam temperature equation. To validate the developed models, the real experimental data in Karakas, Koumanakos, et al. (2007) are used. To investigate the local behavior near an operating point, a linearization method at its steady-state condition is pursued. The time responses of the entire dynamics using step inputs (the oxygen mass flow rate, the coal mass flow rate, the primary air mass flow rate, etc.) are also discussed.     

应用大气污染估算模式分析解决空分装置CO2污染

通过借鉴环境影响评价方法,应用大气污染估算模式对不同排放方式下CO2落地浓度进行计算及对比分析,确认空分装置CO2污染源,找出低成本消除污染的方法。     

I/A Series系统在空分装置中的应用

空分装置采用性能优良、可靠性高的I/A Series系统实现了数据采集、工艺控制、状态流程显示、趋势记录、报警等功能。该系统运行稳定,保证了空分装置的正常运行。     

空分透平冷箱高含氧事件的探讨与分析

介绍了某空分项目中遇到的一起低温透平冷箱高含氧事件问题,分析了氧气泄漏的可能性,并用泄漏检查确定了漏点,解释了高含氧的原因,最后对预防冷箱内法兰连接出现泄漏提出了建议。     

High-efficiency power production from natural gas with carbon capture

A unique electricity generation process uses natural gas and solid oxide fuel cells at high electrical efficiency (74%HHV) and zero atmospheric emissions. The process contains a steam reformer heat-integrated with the fuel cells to provide the heat necessary for reforming. The fuel cells are powered with H₂ and avoid carbon deposition issues. 100% CO₂ capture is achieved downstream of the fuel cells with very little energy penalty using a multi-stage flash cascade process, where high-purity water is produced as a side product. Alternative reforming techniques such as CO₂ reforming, autothermal reforming, and partial oxidation are considered. The capital and energy costs of the proposed process are considered to determine the levelized cost of electricity, which is low when compared to other similar carbon capture-enabled processes.     

空分装置制冷量及冷损构成的讨论

通过做出内外压缩空分流程简化流程图和T-S热力示意图,列出基本的物料和产冷量与耗冷量之间的能量平衡方程,从原理上揭示出内外压缩空分流程制冷量和冷损的构成差异.分别举例阐述了内外压缩空分流程的各项制冷量与各项冷量损失之间的平衡关系.特别指出了内压缩空分流程高压产品气除热端复热不足冷损外,还有额外带走的压力冷损,这是与外压缩空分流程的不同之处.同时,对内外压缩空分流程的制冷量及冷损构成做了定量分析.     

我公司60000m~3/h空分装置分子筛CO_2穿透事故分析及处理

简述60 000m3/h空分装置运行过程中分子筛吸附器出口空气中CO2含量超标的问题,并介绍其原因分析、处理措施,以及从中得到的经验和教训。     

宝钢8号空分设备及系统调试实践

介绍了宝钢8号6万m^3／h空分设备的工艺流程、技术参数及相关特点,重点总结了空压机、系统裸冷、预冷系统、空分工况调整等调试工作,深入分析了调试过程中的故障,通过修改设计和连锁,减少了空压机跳车几率;通过系统加温和水冷塔氮气流量控制,避免了CO2含量超标和产品氧气流量波动;并通过对氩馏分流量和含氩量的精确控制,消除了氩系统氮塞。解决方法经实践检验效果良好。