关键词： HAZOP   安全工程   安全评价   危险性分析  

摘要： 本软件是基于过程工业危险性分析的要求 ,以HAZOP(危险性与可操作性 )分析方法为理论基础 ,按照需求分析、总体设计、详细设计、编码实现、测试等软件工程学的方法 ,开发了HAZOP分析辅助软件。采用VisualBa sic 6 0开发程序和MicrosoftAccess数据库管理系统 ,建立了强大的数据库应用软件。

关键词： hazard and operability   fault diagnosis   Petri net   expert system   knowledge representation  

摘要： Based on systematically analyzing the procedure of hazard and operability (HAZOP) study, the author introduces a method of modeling fault diagnosis with the Petri net with fuzzy colors, in which the fuzzy information can be represented effectively in the process of analysis. The author proposes the architecture of a knowledge base, which integrates HAZOP analysis and fault diagnosis, and provides the conditions for constructing the knowledge-based expert system. The author also presents a method of knowledge representation for on-line HAZOP analysis and on-line fault diagnosis is presented based on the technology of Petri net with fuzzy colors, which establishes a technological fundamental for integrating the automatic HAZOP analysis and fault diagnosis.

关键词： HAZOP安全分析方法   安全   评估   危险性   可操作性  

摘要： 详细阐述HAZOP(危险性和可操作性)分析方法及进行HAZOP分析工作时应注意的事项。

关键词： HAZOP   interlock systems   support system  

摘要： The paper details the integration of a method for the analysis of interlock systems with a software support system for HAZOP analysis. The proposed software aims to enhance the potential of HAZOP in terms of depth and efficiency of the analysis. This enhancement is reached through the continuation of the hazard and operability analysis, limited to a group of events which may hold high risks for the plant and/or surrounding environment. The analysis technique of the emergency interlock systems and other plant protection measures proposed by the Center for Chemical Process Safety (CCPS) of the American Institution of Chemical Engineers (AIChE) has been assumed as a starting point. The system carries out interactively HAZOP analysis of a plant and identifies the presence of possible interlock actions through the analysis of the plant P & I diagram and then visualises the individual interlock systems starting the design phase in which it is possible to analyse and change interactively the single interlocks systems, in order to obtain the required reliability. (C) 2001 Elsevier Science Ltd. All rights reserved.

关键词： process safety   environment issues   occupational health   HAZOP analysis  

摘要： Process safety, occupational health and environmental issues are ever increasing in importance in response to heightening public concerns and the resultant tightening of regulations. The process industries are addressing these concerns with a systematic and thorough process hazards analysis (PHA) of their new, as well as existing facilities. Given the enormous amounts of time, effort and money involved in performing the PHA reviews, there exists considerable incentive for automating the process hazards analysis of chemical process plants. In this paper, we review the progress in this area over the past few years. We also discuss the progress that has been made in our laboratory on the industrial application of intelligent systems for operating procedure synthesis and HAZOP analysis. Recent advances in this area have promising implications for process hazards analysis, inherently safer design, operator training and real-time fault diagnosis. (C) 2000 Published by Elsevier Science Ltd. All rights reserved.

关键词： 可操作性   系统安全   危害识别   HAZOP   局限性  

关键词： HAZOP   batch plants   support systems   risk analysis  

摘要： A support system for the hazard and operabilty studies of batch processes is presented. The search of causes and consequences is automatically performed using similar qualitative models, in form of logic minitrees, for the phases of the operation procedure and the equipment units. More models are considered for the equipment units, one for each subtask in wich they are involved. The search algorithm is integrated by rules for subdividing the plant to be analysed in nodes.

关键词： process safety   artificial intelligence   process hazards analysis   expert system   chemical industry  

摘要： A framework for representing the HAZOP knowledge for batch chemical plants was proposed in Part I of this paper. In Part II, we present a knowledge-based system, called Batch HAZOPExpert, which is an implementation of the framework proposed in Part I. The important features of Batch HAZOPExpert and its performance on an industrial case study are described. (C) 1998 Elsevier Science Ltd. All rights reserved.

关键词： Process control  

摘要： Hazard and Operability (HAZOP) analysis is the study of systematically identifying every conceivable deviation, all the possible abnormal causes for such deviation, and the adverse hazardous consequences of that deviation in a chemical plant. HAZOP analysis is often carried out by a group of experts poring over the process flowsheets for weeks or months. Thus, it is a labor- and time-intensive process that would gain by automation. Previous work has addressed the issue of automating HAZOP analysis for continuous chemical plants. However, the HAZOP methodology of continuous processes cannot be applied to batch and semi-continuous plants as such because they have two additional sources of complexity. One is the role of operating procedures and operator actions in plant operation, and the other is the discrete-event character of batch processes. To represent these characteristics of batch operation, high-level Petri nets with timed transitions and colored tokens are used. The causal relationships between process variables are represented using subtask digraphs. This Petri net-Digraph model based framework has been implemented in G2 for a pharmaceutical batch process case study. The salient aspects of this framework are discussed with the aid of this case-study.

关键词： Expert systems  

摘要： Hazard and operability (HAZOP) analysis is the study of systematically, identifying every conceivable deviation from the design intent, and all possible abnormal causes, and adverse hazardous consequences that can occur in a chemical plant. This is a difficult, labor- and knowledge-intensive, and time-consuming analysis. HAZOP analysis is typically performed by a group of experts poring over the process P&IDs for week. An intelligent system for automating this analysis can reduce the time and effort involved make the analysis more thorough and detailed, and minimize or eliminate possible human errors. Towards that goal, a model-based which the knowledge required to perform HAZOP analysis is divided into and process-general components. The consists of the process material properties and the process P&ID. The process-general knowledge consists of the HAZOP-Digraph models of the process units which are qualitative causal models developed specifically for hazard identification. These models are developed in a context independent manner so that they can be used in a wide variety of processes. An inference mechanism is developed for appropriate interaction between these components in order to identify process-specific abnormal causes and adverse consequences. Based on this framework, an expert system called HAZOPExpert has been developed in an object-oriented architecture using the expert system shell G2. The salient features of the HAZOPExpert system and its performance on an industrial-scale sour water stripper plant case study are presented.