共查询到20条相似文献,搜索用时 187 毫秒
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常大山 《精细与专用化学品》2020,28(6):39-42
综述了国内外异丁烷脱氢制备异丁烯工艺的研究进展,包括FBD-4工艺、Oleflex工艺、Catofin工艺、Star工艺、Linde工艺和ADHO工艺等,提出了未来发展的建议。 相似文献
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采用严格模拟计算的方法,对液化天然气分离过程的现有常规蒸馏工艺与热耦蒸馏工艺、侧线提馏工艺、双效蒸馏工艺和热集成工艺进行了模拟,并比较了其能量消耗。模拟计算结果显示,复杂蒸馏工艺都比常规蒸馏工艺减少了能耗和操作成本。其中,热耦蒸馏工艺可比常规蒸馏工艺节能21.4%,侧线提馏工艺节约13.3%,双效蒸馏工艺可节约34.7%,热集成工艺节约则达37.6%左右,表明新工艺在此分离过程中都有较好的应用前景,尤以多效蒸馏和热耦蒸馏最有优势。 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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介绍了Fenton氧化法的基本反应原理,综述了传统Fenton氧化工艺、微电解-Fenton氧化工艺、Fenton流化床氧化工艺、UV-Fenton氧化工艺、电Fenton氧化工艺的主要工艺形式及其在难降解工业废水中的应用,并总结各种Fenton氧化工艺的特点及工艺选择原则。 相似文献
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水源微污染问题日益加剧,加上常规工艺的局限性,迫使人们研究和开发新的净水工艺.组合工艺由于其突出的整体优势,备受青睐.该文重点介绍了一些典型的组合工艺在微污染水源水处理中的研究和应用,主要有:含活性炭的组合工艺、生化组合工艺、膜法组合工艺、臭氧氧化组合工艺、光催化组合工艺. 相似文献
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介绍红矾钠生产的工艺流程、废水污染情况。根据其工艺特点,分析废水的排放点和排放量,确定废水循环利用的理论基础并制定对废水的治理方案,所排放废水回收到废水收集池,被各工序使用。最终达到生产废水的循环利用、零排放。并推荐使用新的清洁工艺。 相似文献
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Thomas Heer René Wörzberger 《Computers & Chemical Engineering》2011,35(4):709-723
Engineering design processes are highly complex and dynamic inasmuch unforeseen changes occur frequently at process runtime. In this paper we present the process management system PROCEED that aids process managers and process participants in planning and enacting the work processes in plant design projects. It is based on the commercial lifecycle engineering tool Comos. PROCEED exceeds the state of the art in process management in several ways. The models used to represent running design processes incorporate aspects of project plans and workflow instances to reflect the current planning and execution states of work processes. Workflow definitions are used to define best practices for repetitive process parts and are enacted to guide process participants. PROCEED ensures consistent changes of process models even at process runtime. A process manager can resort to numerous progress measures in order to get exact quantitative information about the performance of a process. 相似文献
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介绍了2种液氯汽化技术——蒸汽间接加热法和热水间接加热法,分析了热水间接加热法的缺点,详细阐述了设计的蒸汽间接加热法的工艺流程、自动控制及安全系统。 相似文献
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目前工业化合成硼氢化钠的工艺有Schlesinger法和Bayer法,而Schlesinger法是工业化合成硼氢化钠应用最广的工艺,其关键步骤为氢化钠和硼酸三甲酯的合成。本文一方面从氢化钠的合成、硼酸三甲酯的合成及硼氢化钠的合成3个方面详细论述了Schlesinger法合成工艺进展情况;并指出目前方法存在的问题,如采用油液分散金属钠法合成的氢化钠活性差,制约了氢化钠的应用,硼酸三甲酯工业合成过程中过多使用浓硫酸造成环境严重污染。另一方面对Schlesinger法工艺改进提出了几点设想,如企业全流程合成硼氢化钠可节约外购成本和仓储成本;硼酸三甲酯的合成取代浓硫酸的应用,提纯采用盐析的方法均可以减轻环境污染;硼氢化钠水解过程中采用稀液碱溶液代替淡水,可避免硼氢化钠水解,提高产品收率。 相似文献
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介绍了由拜耳材料科技公司和意大利De Nora北美公司共同开发的氧去极化阴极(ODC)工艺以及包含该工艺的异氰酸酯一体化生产工艺.详细介绍了ODC工艺中所用的电解槽及其主要组成部分和操作参数,重点介绍了用于电解工业盐酸的ODC用的催化剂.通过向阴极区供应纯氧,盐酸在转化为氯气的同时,H+在阴极表面与O2反应生成水,可有... 相似文献
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The hybrid distillation/crystallization process is successfully applied to separate azeotropes and closely boiling mixtures. This process can not only provide pure products, but also allow for significant energy savings. The research progress and industrial applications of hybrid distillation/crystallization are reviewed. Different sequences of hybrid distillation/crystallization process are presented based on the optimized design. The specific developments of each single unit, namely, distillation and crystallization, in the hybrid process are outlined. Applications of hybrid distillation/crystallization in practical cases are highlighted and analyzed. Finally, the key issues and perspectives for further research of this integrated process are illustrated. 相似文献
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The reverse osmosis process is used now for a variety of different applications. As a result the design of the installations shows marked differences which are reflected in the cost of the process. The paper describes the most relevant process variables in relation to the process design and cost. These are the effect of pressure, feed quality, membrane configuration, membrane fouling and pretreatment. The properties of the available and recently developed new membranes are discussed in view of process applicability and possible improvements and cost reductions. 相似文献
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Analysis of the environmental impact of butylacetate process through the WAR algorithm 总被引:1,自引:0,他引:1
The WAR algorithm, a methodology for determining the potential environmental impact (PEI) of a chemical process, is applied to the case study of n-butyl acetate production. Two different schemes are considered: the conventional process, in which the reaction and separation are carried out in separated devices, and the reactive distillation process in which the reaction and separation are carried out in a packed column simultaneously. The WAR algorithm allows determining which process is better from the point of view of generation of PEI into the process, based on the output wastes and energetic consumption. 相似文献