共查询到20条相似文献,搜索用时 140 毫秒
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《中国石油和化工标准与质量》2013,(23)
低温甲醇洗工艺用于净化酸性气体,高效节能,应用广泛。介绍分析了鲁奇、林德公司的低温甲醇洗工艺的技术原理、工艺流程及技术特点,对两种工艺进行了比较。 相似文献
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鲁奇型低温甲醇洗工艺探讨 总被引:1,自引:0,他引:1
通过对鲁奇型低温甲醇洗装置运行的经验总结,提出了对低温甲醇洗工艺的新认识。概括论述了低温甲醇洗工艺的合理性和鲁奇型低温甲醇洗装置的工艺及运行特点,认为低温甲醇洗在煤制合成氨工艺中的应用是成功的。 相似文献
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以新疆伊犁新天煤化工有限责任公司20亿m3/a煤制天然气项目净化工艺方案的选择为例,介绍了NHD工艺和低温甲醇洗工艺的技术特点;对比分析了低温甲醇洗工艺之鲁奇工艺、林德工艺和大连理工大学工艺的技术特点。结果表明:①大型煤化工项目净化工艺宜首选低温甲醇洗工艺;②从投资、能耗、环保等方面综合考虑,林德工艺在低温甲醇洗工艺中具有一定的优势。 相似文献
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德国鲁奇公司开发出了低温甲醇洗工艺,并在国内外大型煤化工项目中得到了广泛的运用。低温甲醇洗工艺比较复杂,概括来说是一种利用物理吸收方式的酸性气体净化工艺。甲醇在约为-60cc温度时具有很强的溶解酸性气体的特性,低温甲醇洗工艺就是在这一特性的基础上开发出来的。本文将简单介绍低温甲醇洗的原理和工艺过程,再对几个重要的影响要素进行分析,包括温度、压力、浓度等对于低温甲醇洗工艺的影响。 相似文献
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<正>兖矿国宏化工有限责任公司(以下简称国宏公司)甲醇项目的合成甲醇原料气净化工艺采用德国林德公司的低温甲醇洗技术;净化后尾气中的H2S处理,目前国内一般采用硫磺回收装置。为了利用现有的设备和工艺和解决低温甲醇洗尾气中H2S含量超标的问题,开展了"离子液法脱除低温甲醇洗尾气中H2S试验"项目。通过试验,为国宏公司甲醇改造工程项目中低温甲醇洗后尾气处理系统设计提供了可靠数据依据。 相似文献
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低温甲醇洗技术是利用冷甲醇作为溶剂,脱除CO2、H2 S、COS等酸性气体的一种气体净化方法。介绍了德国Linde公司和Lurgi公司低温甲醇洗工艺的技术优势;评述了低温甲醇洗技术在大型煤制甲醇、煤制合成氨、煤制天然气等煤化工领域的最新应用情况。 相似文献
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结合义马气化厂低温甲醇洗工艺运行情况,从低温甲醇洗工艺原理出发,就低温甲醇洗在生产中暴露出的问题进行物理化学分析,总结解决问题的方法.逐步提高对低温甲醇洗认识,保障实际生产中低温甲醇洗装置平稳运行,充分发挥低温甲醇洗装置的先进性、经济性及其环保性.同时,为提高企业的生存竞争力打下坚实的基础. 相似文献
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A novel method for process development is presented. The approach is based on the evaluation of available technologies and aiming at new and innovative designs by combining their best features in a creative way. The knowledge is extracted either directly from similar processes or from processes with sufficient analogy. A case study on melamine process development is given to illustrate the application of the methodology. 相似文献
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Patterns whose interpretation varies across contexts are common in many engineering domains. The resulting one-to-many mapping between patterns and their classes cannot be adequately handled by traditional pattern recognition approaches. This important class of pattern recognition problems although common has not received any attention in chemical engineering domain. In this paper, we show that identification of the state of chemical or biological processes is context dependent. Two types of features are important for context-based pattern recognition—primary features, which determine the class of a pattern, and contextual features, which cannot themselves predict the class, but can improve the effectiveness of the primary features. Process measurements can be used as primary features for identifying the current process state, and the previous process state provides the context in which the primary features have to be interpreted. We also propose a dynamic neural network architecture for context-based operating state identification. Three variations of the architecture, each using a different approach to identify change of context, are described. These are illustrated using two case studies for operating state identification—the startup of a simulated fluidized catalytic cracking unit and operation of a lab-scale fermentation process. A comparison with traditional neural networks reveals that the performance of the proposed context-based pattern recognition architecture is superior in all cases. 相似文献
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提出了用传统PSA改良工艺、双级PSA联合工艺、TSA与PSA联合工艺提取中间组分,介绍了工艺过程、工艺流程和工艺特性,并说明了各工艺工业应用场合和实际意义。 相似文献
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该文介绍了当前压缩空气除湿设备的现状和趋势.分析了各种除湿方法及其性能,着重阐述了冷冻式除湿机与吸附式除湿机.研究分析了切片干燥系统中空气除湿系统是如何满足工艺要求的.并介绍了该系统的特点. 相似文献
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介绍了脱碳和加氢2条重油转化路线各自典型的工艺技术及其特点,阐明在未来炼厂渣油加工过程中,溶剂脱沥青技术将发挥举足轻重的作用,其高兼容性的特点使其可与其他工艺技术进行灵活组合,显著提高渣油的转化率以及原油采购和产品结构的灵活性,从而提高炼厂经济效益。新建炼厂的渣油加工技术应是以溶剂脱沥青工艺为核心的脱碳工艺与加氢工艺的组合工艺,充分发挥二者优势,扬长避短,在提高渣油转化率的同时显著改善渣油加氢裂化装置的操作稳定性、降低装置的操作苛刻度以及投资和运行成本,实现经济效益最大化,提高炼厂的竞争力。 相似文献
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The centrifugal filtration process in a centrifuge with a conic filter surface has been analyzed under the assumption of a one-dimensional flow. The problem of calculating the process parameters, such as the speed, the filtrate production capacity, and the liquid pressure, has been solved. The solution is illustrated based on an example of calculations for these parameters and presented in the form of their plots. The obtained plots reflect the specific process features and confirm the validity of the one-dimensional problem formulation. 相似文献