WSA制酸工艺的优化

邯钢新区焦化厂引进WSA制酸工艺,具有工艺流程简单、对环境无污染、操作成本低、经济效益高等优点。主要介绍了该工艺的原理、流程及优缺点,并对工艺存在的问题进行技术改造,改造后的制酸装置实现了长周期稳定运行。     

机械执行系统方案设计软件的开发研制

简述了机械执行系统方案的设计过程，为了高效，快速，准确的设计机械执行系统方案，本文以win98为开发平台，利用VB6．0开发工具进行程序编制，成功开发了机械执行系统的方案设计软件系统，利用本软件可以对同一执行动作进行多种方案对比选择，不但极大地提了设计速度，而且可以使产品的性能达到最优。     

高藻水源水处理工艺的层次优选

水处理工艺的选择属于多目标决策选优,要考虑经济、技术、操作管理诸多因素。本文运用层次分析法对水处理工艺进行组合选优。优化结果表明,高藻水源水质条件下,较优的常规或强化常规工艺排序为：“HPAC-气浮-过滤”〉“PPC—HPAC-气浮-过滤”〉“PAC-气浮-过滤”;制水成本分别为0．31～0．32元／m^3、0．32--0．34元／m^3、0．37元／m^3。其中采用PAC工艺是水源突发性恶化时的净化工艺。     

KNOWLEDGE-BASED ASSESSMENT OF STREAM SAMPLING

This article presents two novel knowledge-based systems for stream-sampling assessment. The first expert system inspects the stream-sampling correctness in mineral-processing plants. It is called the sampling correctness inspector. The second expert system evaluates sampling errors in mineral-processing plants. It is called the sampling error evaluator. The knowledge of both expert systems is collected from the authors' expertise, in addition to other experts' knowledge of sampling mineral-processing streams. These knowledge-based systems take into account the stream properties, the cutter features, and the sampling manner. They were developed and tested successfully.     

An industrial and academic perspective on plantwide control

The purpose of this paper is to stress the importance of selecting the right plantwide control structure and the need for a formalized approach that can encompass the many issues that arise in plantwide control design. Since the concept of process control design based on a holistic view of the process came about, the variety of procedures and approaches to the design problem has illustrated the difficulty of a unified approach. Using examples, the need and advantages of using a systematic approach based on considering the plant economics are highlighted. The examples deal with disturbance rejection, throughput maximization and economic optimization of plants consisting of parallel units.     

Supply chain optimisation for the process industries: Advances and opportunities

Supply chain management and optimisation is a critical aspect of modern enterprises and a flourishing research area. This paper presents a critical review of methodologies for enhancing the decision-making for process industry supply chains towards the development of optimal infrastructures (assets and network) and planning. The presence of uncertainty within supply chains is discussed as an important issue for efficient capacity utilisation and robust infrastructure decisions. The incorporation of business/financial and sustainability aspects is also considered and future challenges are identified.     

DCS过程通道测试子系统的设计

介绍了ＤＪＫ－ ７５００ ＤＣＳ 过程通道测试子系统的技术需求和设计思路，阐述了系统的工作原理，并给出了控制程序的结构及主要模块的流程图     

Design of plant safety model in plant enterprise engineering environment

Plant enterprise engineering environment (PEEE) is an approach aiming to manage the plant through its lifecycle. In such environment, safety is considered as the common objective for all activities throughout the plant lifecycle. One approach to achieve plant safety is to embed safety aspects within each function and activity within such environment. One ideal way to enable safety aspects within each automated function is through modeling. This paper proposes a theoretical approach to design plant safety model as integrated with the plant lifecycle model within such environment. Object-oriented modeling approach is used to construct the plant safety model using OO CASE tool on the basis of unified modeling language (UML). Multiple views are defined for plant objects to express static, dynamic, and functional semantics of these objects. Process safety aspects are mapped to each model element and inherited from design to operation stage, as it is naturally embedded within plant's objects. By developing and realizing the plant safety model, safer plant operation can be achieved and plant safety can be assured.     

Process control and dynamic process planning

Real time machine tool control and the planning activities which precede manufacture are usually interfaced through a low level language which allows little more than position, feed, and speed information to be passed between the two systems. The higher level systems used to describe geometry and tool paths also lack an adequate capability to describe manufacturing processes. The authors discuss the provision of a much richer interface between the planning and control activities which both facilitates the identification and scheduling of suitable monitoring tasks and allows the updating of process plan data from real time measurements. The result of such integration is an improvement in the efficiency of real time optimisation, and perhaps most importantly the possibility of quasi real time process planning. A system that is able to perform both initial process planning and plan refinement based upon low level feedback must also encompass the path generation activity, such a system is referred to by the authors as a dynamic process planning system. The paper describes the fundamentals of the process models, identification algorithms, control strategies, and low level process plan generation used within such an integrated system.