切向离心式喷头在内喷文氏管中的应用

切向离心式喷头在内喷文氏管中的应用段成龙（四川德阳市化工厂，６１８０００）１９９２年１２月我厂进行技术改造，硫酸产量由４０ｋｔ／ａ扩大至６０ｋｔ／ａ。炉气净化采用“文—泡—电”流程，将原外喷文氏管取消，新设计制作了一台内喷文氏管，洗涤液喷头为切向离心...     

内喷文氏管异常情况分析及改造

分析了某50kt／a硫铁矿制酸装置内喷文氏管出口气温超高、压力降上涨快的原因并采取相应改造措施，如改进喷头安装高度设计、优化工艺操作参数、加强设备和管道保温等。生产实践表明，必须加强内喷文氏管设计和操作，以保证设备稳定、高效地运行。     

联箱式陶瓷滤管排的脉冲喷吹系统的研究

对共用一个喷嘴和引射器的联箱式陶瓷滤管排的喷吹性能进行了实验研究并得出结论，认为扩压管式引射器动态性能优于文氏管引射器和直管引射器，且喷嘴至引射器有一最佳距离     

新型电除雾器使用情况总结

新型电除雾器使用情况总结１旧电除雾器使用情况我厂是全国最大的黄金冶炼企业，硫酸装置设计能力为５０ｈｉ／ａ，１９９０年建成设产。净化采用内喷文氏管，填、间、电、电稀酸洗工艺流程，电除雾器为２１４管全塑料电除雾器。由于沸腾炉采用７０％矿浆进料、低温酸化焙...     

内喷文氏管在硫酸生产中的使用及设计

本文介绍内喷文氏管在我国硫酸生产炉气净化中的应用情况,讨论了它的设计方法及材质选择问题。     

40kt／a硫酸系统小改三则

４０ｋｔ／ａ硫酸系统小改三则１文氏管喷水管的改进我厂４０ｋｔ／ａ硫酸装置净化工序采用文一泡一电水洗净化流程，原文氏管喷水管设计是由环形给水管与文氏管喉颈直接相连，然后在喷水管同一中心线环形给水管另一侧接一短节和一旋塞阀（见图１）。我们认为，由于进入文...     

液氧文氏管汽蚀特性计算流体力学研究

文氏管用于精确控制液氢/液氧推进液体火箭发动机的燃料流量。考虑汽蚀过程热效应并假设气相与液相间热平衡,利用计算流体力学方法对液氧文氏管的汽蚀特性进行分析。首先给出了基于多相均匀流模型的雷诺平均Navier-Stoker方程组（RANS）及完全汽蚀模型的数值模型。然后通过对液氮水翼汽蚀过程的计算,得到压力、温度等分布并与美国NASA实验数据做对比,验证了数值模型的准确性。最后详细分析了液氧文氏管的汽蚀特性,给出了文氏管壁面压力、温度及汽蚀强度的分布,考察了进出口压比对汽蚀特性的影响,分析了低温流体维持汽蚀过程的机理。本文计算结果可用于指导液氧汽蚀文氏管的设计。     

一种酸,水合用的净化流程

在文－泡－电水洗净流程的基础上，增加１台ＬＤ６０１电收尘器，改外喷文氏管为内喷文氏管，形成酸，水合用的净化流程，为了达到稀酸循环应用的目的，增设了澄清池和横注式玻璃钢冷却塔，循环稀酸总酸度一般控制在１３－１５ｇ／Ｌ，悬浮物含量〈３０ｍｇ／Ｌ，温度〈３２℃（夏季）脱氟率在８０％左右，稀酸中氟含量在３－４ｍｇ／Ｌ，改造后，排放污水量由１５０ｍ＾３／ｈ减少到２０ｍ＾３／ｈ排放水水质达到国家二级排放标准，     

溧阳市华盛化工环保设备厂(原溧阳市铆焊二厂)

本厂前身是溧阳市铆焊二厂,是化工部硫酸设备专业定点制造厂家,专门从事硫酸生产设计和设备制造专业厂家,有三十多年的历史,以优良的产品质量,日臻完善的售后服务和用户至上的经营理念,为广大用户提供一流的现场技术服务。经营范围◎一、设计、制造、安装37-384管普通型及高效型塑料电除雾器、铅电除雾器、钢衬PE无框架电除雾器、导电玻璃钢电除雾器。◎制造及安装硫酸工程沸腾炉、旋风除尘器、内外喷文氏管、动力波、泡沫塔、斜管沉降器、洗涤器、填料塔、空气冷却塔、脱气塔、干吸塔、转化器、高效换热器、原料烘干机、星型     

Aspen Plus在文丘里预浓缩器设计中的应用

文丘里预浓缩器是喷雾焙烧法盐酸再生工艺的关键设备。本文利用Aspen Plus工程设计软件对废酸处理能力为7.5m3/h的装置进行了模拟,得到了预浓缩器进出口物料的关健参数,然后将Aspen Plus的计算结果结合经验关联式确定了最佳的预浓缩器"文氏管"部分的结构尺寸,本文提出的计算模型被应用于马钢某冷轧分厂原文丘里预浓缩器"文氏管"部分的改造设计中,改造后的设备除尘效果显著,证明了该模型和工艺计算方法的合理性与准确性。     

Challenges and opportunities in computer-aided molecular design

In this paper, the significant development, current challenges and future opportunities in the field of chemical product design using computer-aided molecular design (CAMD) tools are highlighted. With the gaining of focus on the design of novel and improved chemical products, the traditional heuristic based approaches may not be effective in designing optimal products. This leads to the vast development and application of CAMD tools, which are methods that combine property prediction models with computer-assisted search in the design of various chemical products. The introduction and development of different classes of property prediction methods in the overall product design process is discussed. The exploration and application of CAMD tools in numerous single component product designs, mixture design, and later in the integrated process-product design are reviewed in this paper. Difficulties and possible future extension of CAMD are then discussed in detail. The highlighted challenges and opportunities are mainly about the needs for exploration and development of property models, suitable design scale and computational effort as well as sustainable chemical product design framework. In order to produce a chemical product in a sustainable way, the role of each level in a chemical product design enterprise hierarchy is discussed. In addition to process parameters and product quality, environment, health and safety performance are required to be considered in shaping a sustainable chemical product design framework. On top of these, recent developments and opportunities in the design of ionic liquids using molecular design techniques have been discussed.     

化学反应工程教学中加强工程设计训练的改革与实践

我们以培养学生的工程设计能力、提高解决实际工程问题的水平为目的,采取理论教学中围绕工程问题讲解,开设反应器、精馏塔、换热器等化工单元装置设计,典型化工产品工艺流程设计,综合设计型实验,鼓励学生结合实际工程项目完成毕业设计、组建化工设计课程群等系列教学改革措施,取得了良好的教学效果。     

基于并行工程的计算机辅助注塑模概念设计系统研究

针对注塑模设计中设计周期长,设计复杂和一次试模成功率低的现状,本文在公理化设计方法的基础上,探讨了在注塑模概念设计阶段进行计算机支持和实行并行工程思想的方法,提出了基于并行工程的计算机辅助注塑模概念设计系统的框架结构,并讨论了其中的一些关键技术。本文的研究结果将方便设计者进行注塑设计,本文的研究结果将方便设计者进行注塑设计,并能及时发现设计中存在的问题。     

Multiperiod design of azeotropic separation systems II: approximate models

In this paper, the final in a two part series considering the multiperiod design of azeotropic separation systems, we focus on the development of simplified models for azeotropic distillation design. Several shortcut design techniques from the literature are reviewed and key aspects of a successful model for use in multiperiod azeotropic distillation design are identified. Simplified models for azeotropic design that rely on parameters derived from distillation simulations involving rigorous thermodynamic models are developed. These models, which separately approximate the separation tasks and the design and operating conditions necessary to carry out the tasks, are combined with shortcut costing correlations to arrive at an economic measure for flowsheet designs. Several examples are presented. The models developed in this work are geared towards the agent based solution procedure presented in the first paper of this series and are not intended for single period or detailed design problems.     

设计变更中的设计条件交接因素分析

设计变更在工程项目中是不可避免的,设计变更越少,增加的费用就越少.分析施工过程中的设计变更,发现由设计条件交接不准确产生的设计变更占多数,阐述设计条件的交接种类、产生的原因和应该采取的措施及其成效.     

利用AutoLISP程序提高水泥厂建筑设计效率

设计绘图的参数化和文字标注的智能化是提高设计效率的有效途径。在AutoACD的平台上,针对水泥厂建筑设计的特点,笔者对水泥厂建筑设计中常用图形和文字标注开发了一些AutoLISP程序。在提建筑设计效率的同时,也对提高设计质量有帮助。现将部分程序的功能作一简要介绍。     

CHEMICAL REACTOR MODELLING FOR PURPOSES OF CONTROLLER DESIGN

The relation between modelling and design of control systems for chemical reactors is discussed, using several practical examples. Criteria for controlability and satisfactory response are proposed. The dependence of the controller structure on the properties of the reactor model is investigated, and it is shown that the most important decisions in controller design occur during process design. The information required for controller design is different from the information required for scaleup, and depends on the design approach. Examples chosen are control of a fluid catalytic cracker, a hydrocracker, and a crystallizer. Control and reactor modelling are not only often separate activities by themselves, but they are done in separate groups and current practice is to call the control engineering in after the design is finished or the plant either operates or is scheduled to start operation. If we want to make significant advances, we have to realize that some of the most important decisions that affect plant control are made during the pilot plant operation and steady stale process design, and we should make control an essential part of process and reactor design.     

陶瓷机械装备数字化设计与制造技术的应用研究

随着计算机辅助设计和制造技术（CAD/CAM）的发展,尤其是三维数字化CAD的广泛应用,现代设计理念和方法在众多工业设计领域开展应用。陶瓷机械行业存在设计制造手段传统,技术创新能力较弱等问题,本文就如何加速陶机产品数字化设计与制造技术开展了一定的应用研究。     

Design and regulation of the surface and interfacial behavior of protein molecules

Surface and interfacial behavior of protein molecules are crucial for the protein function involved in many biochemical processes and biomedical products such as enzyme design, bio-separation, drug design and delivery. This article is devoted to an overview of design and regulation of the surface and interfacial behavior of protein molecules. The improvement of enzyme surface such as the directed evolution and the rational design of enzymes is introduced at first, followed by the rational design of protein interface for the protein assembly. Thereafter, the design of micro-environment and ligands are described as two examples for the design guided by protein surface. Then the design of protein surface and interface with the help of artificial intelligence will be discussed.     

中欧美标钢筋混凝土梁设计对比分析

详细分析比较了中国标准,美国标准和欧洲标准在混凝土梁设计时的荷载组合和设计基础、材料、混凝土梁计算公式和流程等方面的异同。在此基础上,采用某国外水泥厂的相同设计条件,对比分析采用中欧美国规范时,钢筋混凝土梁的截面和配筋结果存在的差异。三种标准的正截面计算公式相似,只是由于荷载组合的差异造成了最终设计结果的差异,实际设计时应考虑多方面因素的影响。