Experiences from using heat integration software to determine retrofit opportunities within a refinery process

Heat integration techniques can be used to optimize the energy requirement for both new and retrofit plant designs. Software tools for identifying retrofit options are becoming available. This paper reports our experiences from using heat exchanger network (HEN) optimization software for a retrofit case study of an oil refinery process. The HEN optimization software was used to automate the search for the most beneficial retrofit designs following the twostage process proposed by Asante and Zhu. The software provided three potential retrofit designs. Results from this analysis were used as the basis of a rigorous mass and energy balance simulation of the plant. The simulation corroborated the energy savings, but there were some important differences. The simulation required 20% more heat exchange area. Furthermore, the retrofit design involving one topology change was shown to be less economic than an alternative design. These differences are discussed and a revised methodology is proposed.     

监测换热器在线评价系统的设计与实现

本文提出的基于以太网技术的监测换热器在线评价系统,有效地解决了中石化天津分公司循环水系统监测换热器由于地理分布分散而造成的管理信息瓶颈问题,提升了工业水管理水平和效率,为节水减排工程的成功实施和循环水系统的虚拟整合奠定了基础。同时,该设计方案和实现方法也为同类课题的研发提供了可行思路,具有一定的应用价值。     

加热炉空气换热器自动保护系统的设计与应用

介绍了应用MCS-48单片机对加热炉的空气换热器进行温度保护控制的情况.应用结果表明,该系统可靠性强、操作简单,使用效果良好.     

回程式钠离子交换器技术改造

本文详细分析了贵溪冶炼厂动力车间4#、5#钠离子交换器改造前存在的问题,提出了改造方案,介绍了改造后的使用效果,并对改造前后的运行数据、产生的经济效益和社会效益作了对比。     

激光半焊型板式换热器在冶炼领域的应用

本文详细介绍了激光半焊板式换热器的原理,分析了激光半焊模块与普通板式换热器相比较的优越性,并最后给出了其在化工领域应用的最新进展。     

Actuator Fault Tolerant Control Based on a MIMO-MPC: Application in a Double-Pipe Heat Exchanger

In this work, an experimental fault tolerant control (FTC) implementation is presented. The FTC is based on a multi-input multi-output (MIMO) model predictive control (MPC). The aim of the FTC is to keep on operating a double-pipe counter-current heat exchanger even if the main actuator of the heat exchanger is stuck open. To develop the FTC, an adaptive observer was implemented in order to design a fault detection and isolation (FDI) system. In the FDI system, the cold and hot water flow rate estimations by the adaptive observer are compared to the control signals provided by the MPC. The results of the implementation of the FTC using a MIMO model predictive control were compared to the results obtained in a previous work which was developed using model-following control.     

浅层地埋管热交换器换热能力分析

采用自主研发的浅层地下岩土热物性测试平台,通过模拟冬夏季取放热实际运行工况,对不同工况下地源热泵地埋管热交换器的换热能力进行了实际测试,分析了地埋管换热器与周围地下岩土之间的换热状况,确定了该地区地源热泵系统地埋管换热器冬夏季工况下的实际单位延米换热量。同时,根据测试数据推算出了该地区地下岩土的综合导热系数,体积热容等热物性参数,为该地区地源热泵系统的模拟分析以及设计施工提供了依据。     

数控机床控温冷却系统的研究与发展综述

本文综合叙述了目前国内外数控机床控温冷却系统的研究与应用情况,对各种技术及产品做了综合性评价,并指出了机床温控技术的研究发展方向.     

平面螺管换热器的研究

本文导出了平面螺管几何参数之间的关系及换热准则方程,并对这种换热器进行了设计计算和特点分析。经测试,其性能符合设计要求。     

换热网络的柔性分析

本文基于换热网络的过程模拟,借助于灵敏度系数,给出了一种简单有效的换热网络柔性指数计算的方法。当换网干扰变量变化并引起了控制变量的变化时,如有调节变量,可通过改变调解变量使控制变量返回到设定值。编制了计算机程序,调解曲线可在计算机屏幕上绘出,也可定点检验换网操作的可行性。