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介绍了锦西石化公司Ⅰ套常减压装置电脱盐系统改造的具体情况。从改造背景出发,分别阐述了实施改造的必要性、改造的具体情况、改造新技术的应用情况和改造后的标定结果,并总结了改造取得的良好成果。 相似文献
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针对改造项目的特殊性,结合高空大口径管道敷设出现的难点,造成改造项目方案制定困难、拖延工期、施工困难和大幅度提高改造成本等问题,经过调查分析,结合改造项目的实际,阐述了高空大口径管道的特点,提出不同的改造方案并对比优化,解决了改造项目中高空大口径管道的敷设问题,节约了改造工期,并降低了改造成本和高空管道敷设的风险。 相似文献
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阐述大型合成氨装置脱碳系统的改造情况,分析改造前脱碳系统运行中存在的问题,介绍脱碳系统改造内容及改造后的运行情况,并总结改造后的工艺效果。 相似文献
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介绍在合成气脱瓶颈及醋酸填平补齐改造项目中,水煤浆加压气化装置挖潜改造的主要内容、改造实施步骤、改造效果,以及改造投用后出现的问题和再优化措施。 相似文献
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金桥热电厂为降低厂用电率,减少发电成本,创建环境友好型、资源节约型电厂对循环泵电机进行变极变速改造。本文介绍了循环泵电机变极变速改造原因、改造节能原理、改造方案以及改造后的运行方式,并对改造前后的运行参数进行对比分析,给出对循环泵电机变极变速改造后的节能效益。 相似文献
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对80kt/a硫酸装置转化及干吸工序进行挖潜和改造,合理利用资源,采用新工艺、新材料,最大限度地提高硫酸产量。 相似文献
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针对换热网络(HEN)的优化改造,提出了一种利用公用热量实现多能互补理念的改造思路,通过充分利用热过程物流中的低温余热,完成热集成系统的优化改造。本文基于参考点非支配排序遗传算法(NSGA-Ⅲ),通过综合评估集成废热回收(WHR)系统的换热网络的年度改造费用、年度改造收益、能耗(包含换热网络的冷/热公用工程和废热系统冷却水和电力消耗)和废热系统的有益产出,从而获得最优解决方案。对原油蒸馏系统(10H5C)的优化改造研究案例表明,通过权衡集成系统的能源消耗、WHR系统的产出、改造费用和改造收益4个目标,采用NSGA-Ⅲ算法求解获得了多维度的改造方案,相较于基础网络不仅有可以为用户最大节省22.9%能源消耗的改造方案,还有WHR系统最大输出为4.003×104kW的解决方案,也有最小改造费用为1.848×106USD/a的改造方案,还有最大改造收益和最大投资回报率分别为1.173×107USD/a和121%的解决方案;最后通过比较集成WHR系统与单独HEN优化改造的性能,证明了集成WHR系统的实用性和可行性,以及余热回收多能互补技术对提高流程工业能量集成系统能量利用效率的重要作用。 相似文献
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简述了螺旋式捞渣机的工作状况 ,以及底部轴承由于槽体漏水容易出现锈蚀卡死的问题 ,详细介绍了通过材料选用及结构改造后良好的应用情况 相似文献
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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. 相似文献
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针对现有随机算法对高维能量集成网络(换热网络)求解困难与易陷入局部最优的问题,提出了一种基于参考点的非支配排序遗传算法(NSGA-Ⅲ)的换热网络优化方法。该方法使用特殊的支配关系引入了自适应离散化Pareto前沿与参考点机制,对那些非支配且接近参考点的种群个体进行保留。本文基于非等温混合分流分级超结构模型,以用户最关心的环境影响指数、投资费用、操作费用与改造工程量为改造优化目标,从多个方面、多个层次考虑换热网络改造问题,为用户提供多种可供选择的改造方案。案例研究表明,改造后的换热网络以每年57304USD的投资费用节省25%的年度操作费用,同时还具有较小的环境影响指数与改造工程量;与文献相比,可以提供多元化的节能改造方案,满足用户的不同改造需求,且获得优于文献的综合改造结果,表明该方法具有较强高维求解能力。 相似文献
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Process retrofit (PR) is becoming a key issue for many existing industrial chemical processes due to the changing prices and market conditions, the emerging new design methodologies, as well as to environmental regulations. PR is sometimes far more complicated than process grassroots design, and it is usually team‐based work in which many departments and disciplines are concerned. Thus, it is very important to rationally organize the work and cooperation of the team members involved in the PR project. In this paper, we present some insights on the significance of PR, the methods for identifying the bottlenecks, as well as the principles and strategies of completing a retrofit project. A systematic procedure for process retrofits is developed based on the experience of several industrial retrofit projects. 相似文献
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Multi-period heat exchanger network (HEN) retrofit is usually performed by targeting and matching heat trans-fer areas. In this paper, based on the reverse order matching method we proposed previously, three strategies of matching heat transfer areas are proposed to minimize the investment cost for the retrofit of HEN in multi-period, in which replacement of heat exchangers, addition of heat exchangers and addition of heat transfer areas are performed. We demonstrate the procedures through three scenarios, including maximum number of substituted heat exchangers after retrofit, minimum additional heat transfer areas in the retrofitted HEN, and minimum investment cost for retrofit. The strategies are extended to a single period HEN retrofit problem. The results of multi-period and single period HEN retrofit problems indicate the effectiveness of the strategies. More-over, these results are better than those reported in literature. The strategies are simple and easy to implement, which are of great benefit to large-scale HEN retrofit in practice. 相似文献
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介绍国内大型乙烯装置第二轮改造情况,工程设计应遵循的原则,改造项目的特点,以及设计工作中应注意的问题。 相似文献