带夹套容器设计压力的确定

本文提出如何确定夹套容器的设计压力及压力，建议ＧＢ１５０－９５版增加“计算压力”一词。     

夹套伴热式压力管道设计

先从压力管道的特点、管道力学的内容、管系静应力分析方法、SIMFLEX-Ⅱ应力分析法、管系的热胀及柔性设计等方面阐述管道力学分析的内容和方法,再从工艺流程、泵出口管线设计、管线的应力分析、运行情况调查等方面分析了夹套伴热式压力管道的设计方法。     

浅议带夹套真空容器液压试验压力PT的研究

介绍了带设备法兰的夹套反应釜的釜体为真空时釜体试验压力ＰＴ的研究。     

内筒需作热处理的夹套容器的设计

本文介绍内筒需作热处理的夹套容器采取内筒和夹套之间添加环向和纵向垫板的结构，能减少返修事业的麻烦。     

半圆管夹套容器设计计算方法

文章提供了一种在HG20582－1998标准中不能涵盖的半圆管夹套计算方法。     

大型夹套式低压液氨贮罐设计

介绍国产化第一台2000m∧3夹套式低压液氨贮罐的设计,包括设备简介、选材、设计计算和结构设计等内容,除了一般常规设计中应考虑的问题外,突出介绍了一些良好的结构设计和计算问题。     

带夹套容器设计参数的确定

论述了带夹套容器中内筒及夹套设计参数的选取,对带夹套容器设计中的几个常见问题进行了分析。     

大容积夹套薄壁圆筒罐的开发应用

通过设置加强圈的方法,开发了一种大容积夹套薄壁圆筒罐,并将其成功地应用到红霉素发酵生产中。     

带夹套的汽提塔设计

夹套设备广泛应用于石油、天然气等化工领域,与一般的压力容器相比,作为一种多腔压力容器,其结构设计与设计参数的选取存在差异。本文以某单位1 150万t/a重油加氢裂化装置中的带夹套的汽提塔为例,对设计温度、计算压力、腐蚀裕量、焊接接头系数等参数的选择进行介绍;进行强度计算确定壳体厚度、耐压试验压力以及根据温差应力确定夹套是否需要设置膨胀节;依据TSG 21—2016对夹套塔进行压力容器分类。     

低压法氯气液化工艺的选择

文中概述氯气在工业上的用途以及氯气的相关物性,简述几种氯气液化的工艺,根据液化压力以及液化温度的不同,可以分为高压法、中压法以及低压法;着重介绍了低压法氯气液化的2种工艺,R-22直接冷冻法和氨-氯化钙盐水间接冷冻法.通过R-22直接冷冻工艺与氨-氯化钙盐水间接冷冻工艺相比较,得到采用R-22直接冷冻工艺进行氯气液化比...     

High pressure extraction of oil seed

For calculation of phase equilibria of the system seed oil/CO₂, an equation of state published in the literature has been fitted to experimental data of that system. The results thus obtained are of only limited use in designing a supercritical extraction process. The experimental investigation of the mass transfer kinetics is much more significant. Mechanical processing of the oil seed’s cell wall structure has been shown to be of great importance. The best specific yields were achieved with material that had been mechanically pre-deoiled and thereby broken open. Yields are increased considerably by use of the gas mixture CO₂/propane or other special gas mixtures or by the addition of refrigerants. However, the extraction times achieved in batch operation, together with the mass product nature of oil seed, make a continuous supercritical extraction essential if operation is to become economic relative to the conventional hexane extraction. To this end, the energetics of the process have been calculated, and practical possibilities for continuous operation are discussed. Presented at the International Symposium, “High Pressure Chemical Engineering,” Erlangen, in October 1984.     

氯化液预热器疏水阀选型

分析了疏水阀失效原因,通过计算最大疏水量,对疏水阀进行重新选型,达到节约蒸汽、改善环境的目标。     

液氯输送方法选择

介绍4种液氯输送方法（汽化槽加压法、干空气加压法、液下泵输送法和屏蔽泵输送法）的工艺流程,比较其优缺点,认为用屏蔽泵输送液氯安全、环保、高效。     

搪瓷反应罐脱瓷分析及防护措施

对搪瓷反应罐的脱瓷问题进行了分析，找出了脱瓷的原因，提出了解决办法。     

压力容器大直径接管现场试压盲板的选用及设计

文章根据现行的容器标准,讨论了容器试压时容器接管封堵用封头形式及厚度计算,主要包括椭圆形封头,平盖封头、盲板法兰等封头的设计选用,并探讨了带加强肋平盖封头壁厚和加强筋数量、厚度的计算方法.该方法计算的盲板安全、经济,在中石油七建公司承建的抚顺、钦州项目得到实际应用验证,达到预期效果.     

高压流体过冷流动沸腾的数值模拟

在二流体模型基础上,采用RPI模型计算加热壁面的相间质量传输,对竖直圆管内高压流体过冷沸腾流动过程进行数值模拟.研究发现:壁面温度沿流动方向有明显拐点.根据壁温变化趋势可以判断,转折点位置即为过冷沸腾起始点;管内流体速度的增长曲线并不是简单单调递增的过程,而是速度增长由刚开始的缓慢上升到急剧上升,与空泡份额的分布曲线相...     

中压蒸汽管道液压试验压力的确定

通过对延迟焦化装置中的3.5MPa中压蒸汽管线进行压力试验,重点讨论了设计温度高于试验温度时,管道系统水压试验压力的确定。     

基于COSMO-SAC模型的离子液体萃取剂的选择

COSMO-SAC模型是计算无限稀释活度因子的一种有效方法,只需知道分子结构,即可进行有机物或离子液体的无限稀释活度因子计算。COSMO-SAC模型中最耗时的计算步骤是产生σ-图谱(σ-profile)的量子化学计算。利用Materials Studio软件中的DMol3模块,建立了包含32种离子液体阴离子和191种离子液体阳离子的σ-图谱数据库。利用σ-图谱数据库和COSMO-SAC模型,针对离子液体液液萃取过程,提出了离子液体萃取剂的计算机辅助分子设计方法。以乙醇-乙酸乙酯体系为研究对象,选择了适宜的离子液体萃取剂,采用乙醇-乙酸乙酯-离子液体三元体系的液液平衡文献数据进行了验证。     

Selection of top layer materials for gas–liquid membrane contactors

Gas–liquid membrane contactors frequently suffer from wetting of the microporous membrane. Stabilization layers at the liquid side of the membrane potentially prevent this wetting. We applied such stabilized membranes to the separation of olefins and paraffins using AgNO₃ solutions as absorption liquid. The stabilization material requires permeation of olefins at minimum counter transport of water. Appropriate selection of the top layer material is crucial in this application. This report describes the selection of potential top layer materials. Dense films of the selected materials were prepared and used to determine ethylene and ethane permeabilities, to perform pervaporation experiments with water and a 3.5M solution of silver nitrate in water, and to determine the swelling behavior of the dense films in water and in a 3.5M silver nitrate solution. Based on the characterization experiments, ethylene propylenediene terpolymer is the most appropriate candidate with the highest potential for application in a gas–liquid membrane contactor for the separation of paraffins and olefins. It has a relatively high olefin permeability (46.4 Barrer) and a corresponding low water vapor permeability and low swelling tendency in a 3.5M silver nitrate solution (1490 Barrer and 0.14 wt %, respectively). © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 92: 323–334, 2004