齿轮轴修复安全性探讨

对催化装置四机组运行状态进行分析,介绍了齿轮箱高速轴及轴瓦损坏的情况,并分析说明了引起损坏的原因。结合生产实际确定合理的齿轮轴修复工艺方案,即采用激光融敷表面修复高新技术,迅速可靠地对齿轮轴进行修复,保证了设备运行的可靠性,从而实现安全生产、节能降耗、效益增长。     

燃煤锅炉脱硫除尘装置改造

燃煤锅炉的湿式脱硫除尘装置常因净化液管路出现故障而影响到生产,主要是因为安装在其内的陶瓷嘴受高温烟尘的影响而爆裂,通过安装结构简单、性能可靠的自控系统使装置保持连续正常工作。     

原子吸收分光光度计常见故障的分析与处理

讨论了原子吸收分光光度计测定过程中常见的故障以及如何分析、处理这些故障的过程。     

Automated diagnosis of malfunctions based on object orientated programming

The diagnostic event analyser (DEA) is a system for automated diagnosis of malfunction in continuous processes. DEA interprets real-time sequences of abnormal events such as measurements out of normal ranges and violation of quantitative algebraic constraints. DEA can be used to supplement an existing alarm system, providing a higher-level interpretation of patterns of abnormal events for the process operator. To use DEA, the user must supply only standard ‘form’ inputs of the root causes and relationships between abnormal events. DEA is implemented using object- oriented programming, a technique which allows general rules and procedures to be applied to process-specific objects. This architecture facilities treatment of multiple malfunctions and robustness to variation in event sequences.     

SD -3A测氡仪观测故障及解决方法

以河源4#SD - 3A测氡仪观测原理、运行性能为研究对象,结合几年来所发生的观测故障状况,在观测及维护过程分析SD -3A测氡仪故障原因,对测氡仪发生故障时采取相应的解决方法,进而熟练掌握测氡仪观测特性并及时解决实际操作难题.     

无料钟炉顶上密封阀液压缸故障分析

针对炉顶上密封阀及下密封阀旋转液压缸故障的发生,作了系统的技术分析,找出了事故发生的根本原因,提出了合理的整改方案,实践证明取得了良好的效果.     

SCADA系统安全联锁误动作原因分析及改进方法

介绍了临濮线SCADA系统升级改造后,在对系统进行现场功能测试时,发现SCADA系统安全联锁保护产生误动作现象,从系统处理方法、系统回路和运行环境3个方面,结合SCA-DA系统的组成原理及现场实际情况分析了产生误动作的原因及处理方法,通过对相关数据和设备的整改,解决了系统的误动作问题,确保了系统的安全、可靠运行,提高企业经济效益。     

流化床锅炉运行调整与磨损的关系及磨损问题改进措施

流化床锅炉是近年才发展起来的新型洁净煤燃烧技术。笔者从锅炉运行过程中发现了一些故障和缺陷,结合自身的运行和调试经验,对故障原因作出了分析,提出了解决措施。     

A design method of a plant alarm system for first alarm alternative signals using a modularized CE model

Management of a plant alarm system has been identified as one of the key safety issues because of disasters caused by alarm floods. When a chemical plant is at abnormal state, an alarm system must provide useful information to operators as the third layer of an independent protection layer (IPL). Therefore, a method of designing a plant alarm system is important for plant safety. Because the plant is maintained in the plant lifecycle, the alarm system for the plant should be properly managed through the plant lifecycle. To manage changes, the design rationales of the alarm system should be explained explicitly. This paper investigates a logical and systematic alarm system design method that explicitly explains the design rationales from know-why information for proper management of changes through the plant lifecycle. In the method, the module structure proposed by Hamaguchi et al. (2011) to assign a fault origin to be distinguished is extended. Using modules to investigate the sets of alarm sensors and the alarm limits setting for first alarm alternative signals to distinguish the fault origin, an alarm system design method is proposed. Also, the completeness of fault propagation for a branch of the cause–effect model as the plant model is explained. Using the modules and the set of fault origins to be distinguished by the alarm system, we try to explicitly explain the design rationales of the alarm system.     

高速铁路事故预防措施的研究

结合我国高速铁路广深线 (广州—深圳 )及秦沈线 (秦皇岛—沈阳 )的工程设计过程 ,分析了可能引发铁路事故发生的几方面的主要原因 :速度控制问题、轨道故障、自然灾害等 ,并对这些事故因素提出了预防措施。这些措施的实施对减少铁路事故的发生有着重要作用