Multicomponent batch distillation with distillate receiver

Based on the assumption of adiabatic equilibrium stages, a rigorous calculation procedure applicable to a multicomponent batch distillation with a distillate receiver under total reflux condition was developed. Provided that the operating conditions including the desired product purity of the most volatile component in the receiver are specified, the proposed model estimates the volume of the distillate receiver, changes in compositions in the receiver and still, concentration profiles of the column, and the batch time required to complete the separation. In order to test the validity of the proposed model, experimental data for the separation of acetone-methanol-2-propanol mixture using a 10 cm I.D. column having six theoretical stages were compared with the simulation results for the two cases when the distillate receiver is initially empty and initially full.     

PY-GAS 3000型裂解气取样器在北方寒冷地区的应用

介绍了PY-GAS 3000型取样器在中国石油独山子石化分公司乙烯厂裂解气采样应用的一些技改技措。这些措施使该取样器成功应用在北方冬夏环境温差大的地区。对裂解气这类特殊样品在寒冷地区的取样,以及对回流取样器的具体应用,具有一定的参考价值。     

精馏计算中相对挥发度α的选择

推演了在精馏计算中相对挥发度α的选择对最少理论塔板数Nm 及最小回流比Rm 的决定影响。从基础理论上阐明了α的选用原则。并且对几个经典理论公式的相互关系作出了解释。     

工业萘蒸馏装置节能的生产实践

利用Aspen Plus化工模拟软件,对工业萘装置的初馏塔和精馏塔进行了模拟计算,考察了工艺操作参数对产品质量和能耗的影响,优化了工艺操作参数,降低了装置的生产能耗。     

焦粉回配工艺技术

我国主焦煤资源日益贫乏,焦粉作为焦化企业生产成品之一,较多焦化生产企业只利用其热值作为普通燃料低价出售浪费能源,降低企业生产效益,并对环境造成较大污染,现结合神华乌海能源公司焦化厂生产实际,对焦粉回配炼焦进行相关分析.     

U形管内蒸汽冷凝回流的实验研究

在单根U形管内进行蒸汽冷凝回流实验 ,研究冷凝回流的流动及阻液现象。U形管内径为 2 0mm ,总高度为 4 1m和 7 0m两种。主要实验参数范围为 :系统压力 0 1～ 6.0MPa ,蒸汽质量流速 4～ 4 5kg/ (m2 ·s) ,二次侧进口冷却水温度 2 0～ 1 96℃。给出了不同压力下冷凝回流阻液起始点无因次汽相折算速度jg ,并与典型的现有阻液计算关系式和分析模型进行了比较。实验结果与Wallis关系式 ,j 1/ 2g+j 1/ 2f =C(C =0 .8～ 0 .9) ,Faghri关系式 ,Kg1/ 2 +Kf1/ 2 =3.2tanhD 1/ 4,以及作者提出的基于分离流模型和包络理论的阻液分析模型的计算结果较好符合     

U型管内蒸汽冷凝回流压降特性的研究

进行了单根 U型管内蒸汽冷凝回流实验。 U型管的内径为 20mm,总高度为 4.1m和 7.0m两种。在系统压力 0.1～ 6.0MPa、蒸汽质量流速 4～ 45kg/m2· s、二次侧进口冷却水温度 20～ 196℃的范围内,研究了 U型管内蒸汽冷凝回流的流动及其压降特性。     

MGD工艺技术应用

稳定汽油降烯烃和增产柴油是当前炼化企业不断探索的课题，本文通过MGD工世和粗汽油在反应器回注量的改变，做了一次成功的尝试。     

SCR OVER COMPOSITE CATALYSTS

Composite catalysts consisting of a modified Y zeolite (H-Y, Cu-Y, DAY, or Cu-DAY)and V₂O₃ and/or TiOj were synthesized by mixing a modified Y zeolite with n-hexane solutions of ammonium monovanadat and/or isopropyl orthotitanate. Both reflux and impregnation methods wer: used to add Ti02 to the catalysts. It is found that N₂/NO_in over the composite catalysts synthesized by ::eflux method is higher than that by impregnation. In addition, N₂/NO_in increases with oxygen concentration for oxygen concentration less than 2%, while it is independent of oxygen concentration for oxygen concentration greater than 2%. Effect of Ti02 in The catalyst on N₂/NO_in varies depending on the type of :atalysl and the method of synthesis. N₂/NO_in increases with the addition of copper and/or vanadia to composite catalysts. Furthermore, these composite catalysts are S0₂ resistant.     

氩提取率与制氩系统及上塔工况的关系

在空分设备操作时，为提高氩提取率，缩流程空分设备，详细分析了氩馏分抽取量过大，提取率的正确操作方法。往往采取加大氩馏分抽取量的方法。结合内压对上塔和制氩系统工况的影响；简述了提高氩