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甲醇精馏装置在甲醇生产中占据重要的地位,利用先进且高效节能的精镏装置,对降低甲醇生产成本和节能减排,节能降耗都起到很重要的作用。我厂甲醇精馏装置所采用的是五塔精馏技术,本文讨论了五塔精馏的工艺特点,并从甲醇精馏原料、回流比等对精馏操作的影响进行了分析,发现五塔精馏具有消耗低、环保效益好、操作简易且系统稳定、工艺指标易于调整、产品质量优良等优点。 相似文献
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提出一种新型多效四塔精馏甲醇工艺,采用热集成技术,用加压塔塔顶蒸气和中压塔塔底部分液体换热,中压塔塔顶蒸气和常压塔塔底部分液体换热,有效利用冷热流,形成两个双效精馏。通过PRO/Ⅱ化工模拟计算软件对流程进行稳态模拟和分析,对操作参数进行优化。结果表明:甲醇四塔多效工艺方案合理,产品质量优良,流程操作稳定,能源消耗显著减小,具有良好的社会意义。 相似文献
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1问题的提出 我公司总氨产能现已达到250kt/a以上,合成氨流程为氨串联醇,其中甲醇精馏装置共2套,为双塔精馏流程,预塔及主塔直径分别为1000mm及1400mm,为浮阀塔结构,塔板数分别为65块和85块。原设计每套装置年产20k精甲醇,现实际每套装置年生产能力可达25-30kt。[第一段] 相似文献
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通过对甲醇精馏装置回收改造塔进行技术改造,解决了粗甲醇中乙醇含量高的技术难题,提高了精馏装置的生产负荷,保证了产品质量。通过一年的生产运行验证,改造取得了良好效果。 相似文献
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本文通过分析甲醇精馏中双塔精馏流程、三塔双效精馏流程和四塔流程,并对三种流程的精馏效果进行比较,得出了各种流程的优缺点及适用情况,对优化甲醇精馏流程具有重要指导意义。 相似文献
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甲醇是C1化工的母体,用途广泛。甲醇精馏能耗约占整个甲醇生产总能耗的20%,随着能源价格的不断飙升,甲醇精馏过程的节能降耗势在必行。国外[1]已经系统地研究了几种具有代表性的热集成甲醇三塔双效精馏工艺。现今许多国内甲醇生产厂家采用四塔双效流程,即在德国Lurgi公司研发的三塔双效精馏工艺的基础上,增加1个回收塔改造而得,四塔双效流程较双塔流程可节约30%~40%的能耗[2]。由于高 相似文献
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晋煤天源原有甲醇精馏装置采用预塔、加压塔和常压塔三塔精馏流程,随着公司产品结构优化调整方案的实施,原装置5万t/a的处理能力已不能满足实际生产需要。经多方考察论证,对甲醇精馏装置进行产能优化调整,调整过程尽量利用原有设备,通过并联新设备的方式,实现装置产能优化,达到10万t/a的处理能力,精甲醇产品符合优等品质量标准。 相似文献
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萃取精馏在甲醇精馏中的应用 总被引:1,自引:0,他引:1
为了提高甲醇产品质量,研究了萃取精馏在甲醇精馏中的应用。结合实际工程经验,应用ASPEN模拟软件,分析在甲醇精馏中应用萃取精馏的实例。结合萃取精馏的基本原理,分析特征组分在精馏塔内的相对挥发度。萃取精馏已经成功应用于多个甲醇项目,产品均同时达到O-M-232K AA级和GB 338-2004标准,说明萃取精馏在粗甲醇精馏中的应用是成功的。 相似文献
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异丁烷资源丰富,但工业利用率低,造成资源未得到合理利用。本文首先分析了C3和C4混合物分离体系的特点,建立异丁烷精馏常规工艺流程,并对其进行模拟计算。模拟结果表明:塔釜蒸汽消耗量较大,造成能耗过高。目前,解决精馏过程能耗过高的处理方式集中在工艺参数的优化,在精馏方式上却少有报道。为了解决这一问题,本文提出了采取热泵精馏技术进行节能改造,并建立了异丁烷精馏的热泵精馏新工艺。通过模拟计算且对结果进行深入分析,得出当塔顶/塔釜压力分别为7×105Pa和7.5×105Pa、循环工质流量3055.13kmol/h、压缩机压缩比为2.286条件下满足分离要求,且能耗较低。分析热力学效率与经济性并与常规流程进行对比,结果表明:热泵精馏新工艺节能效果极佳,由常规精馏的68.16GJ/h降低为热泵精馏的45.87GJ/h;热泵精馏新工艺适用于该体系且更加节能、环保。 相似文献
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Oscar H. Wurster 《Journal of the American Oil Chemists' Society》1938,15(11):292-294
This paper describes the method of operation and results secured with the Continuous Process of Glycerine Distillation. Improved
results in quality, yield and cost of production of distilled glycerine is due to the continuous operation, with high vacuum,
low temperature and continuous salt removal.
Presented at the Twelfth Fall Meeting of the American Oil Chemists' Society, Chicago, Ill., October 6–7, 1938. 相似文献
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While practically all the fatty acids produced in the fatty acid industry are distilled products, these materials are all,
at least to some degree, fractionated fatty acids. Rarely indeed are today’s fatty acids suited for any of the many applications
to which they are put without the quality and homolog distribution improvements which only fractional distillation can guarantee.
Thus, this separation is of vital importance within the fatty acid and derivative industries. Fractional distillation is industrially
a practical separative method for: (a) 16:0 and 18:0 fatty acids, such as those derived from hydrogenated fats and oils like
tallow, soybean, cottonseed soapstocks, palm oil and others; (b) 18:0, 20:0, 22:0, and 24:0 fatty acids from hydrogenated
fish oils or high erucic rapeseed oil; and (c) 8:0, 10:0, 12:0, and 14:0 fatty acids from the hydrogenated fatty acids from
the lauric oils group (coconut, palm kernel, babassu, etc.). While theoretically possible under idealized conditions in the
laboratory, it is not practical to separate palmitic, oleic, heptadecanoic, and stearic acids by means of fractional distillation 相似文献
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W. Smith 《Chemical engineering science》1984,39(6):997-1003
It is shown for a differential-contact distillation column that when there is net evaporation or net condensation within the column the height of a transfer unit should be lower than it is for adiabatic conditions. However, this improvement in efficiency, which is due to thermal distillation occurring in addition to contact distillation, is detected experimentally only for net condensation. It is also shown that, for the same reflux ratio at the top of the column, when there is thermal distillation fewer transfer units are needed, seemingly giving a further improvement in the performance. However, operating under the more realistic criterion of the same heat load per unit of throughput, implying a higher reflux ratio for adiabatic conditions, a column gives about the same separation whether there is thermal distillation or not. 相似文献
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R. Multala J. Aittamaa K. K. Salminen A. Halmu M. Jrvelinen 《Computers & Chemical Engineering》1979,3(1-4):47-52
A pilot-plant unit for distillation studies consists of a tray column, an on-stream process analyzer and a process computer. The analyzer system is based upon a quadrupole mass spectrometer, and provides means for on-line concentration measurements of both liquid and vapor samples with multicomponent mixtures. A study of multicomponent plate efficiencies is presented. Experimental results with water/ethanol/n-butanol mixture show that the Murphree vapor phase efficiencies of the components differ markedly. 相似文献