共查询到20条相似文献,搜索用时 62 毫秒
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1前言我厂季成四醇设计能力为1000t加,脱醇塔塔径400,填料高11m,填料为cy型金属丝网波纹填料。该填料分离效率极高,但其通量偏低,生产中进料量仅能达到0.5m3/h,稍有提高就会造成液泛不下料、塔顶严重带料、脱醛塔无法控制等现象。我们用高通量的填料更换了部分cy型填料,并相应调整了缩合液进口位置,同时增加了回流装置,严格控制进料量和出料量,整个改造工作于1994年8月完成,运行至今情况良好,脱醒塔实际处理量达到并超过了原设计能力。2脱醛塔的改造2.1填料选择填料选用250X型板波纹及cy型丝网波纹填料,材质均为ICrl8NigTi… 相似文献
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加压下板波纹规整填料塔中液相混合行为 总被引:2,自引:0,他引:2
采用脉冲示踪法测量了在0.3MPa、0.5MPa和0.6MPa压力下以及在一系列液速和气速下250Y型孔板波纹规整填料内液相的混合行为。应用时域最小二乘法由实验数据得到了液相的轴向返混系数和轴向有效流速等参数,并以y=aReL^e10^cReG10^dp的形式对轴向Peclet准数进行了关联。本研究补充了目前缺乏的加压操作下规整填料液相混合行为的数据。 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