PVC聚合釜防粘釜技术

论述了PVC聚合釜防粘釜技术的机理及选择防粘釜剂的技术要点。重点介绍了自主开发的PVC聚合釜防粘釜喷涂设备及其操作要点。     

悬浮聚合搅拌釜粘釜规律的研究

实验在Φ280mm的有机玻璃釜中，用研磨极细的铁粉和强磁材料钕铁硼建立了釜内流动条件对粘釜影响的冷模研究，采用三叶后掠式桨和二叶推进桨研究物料在釜内的粘釜规律，冷模研究的结果针对聚合釜设计和生产具有一定的指导意义。     

国产30m3聚合釜防粘釜技术的改进措施

叙述了氢乙烯聚合反应的粘釜机理，并介绍了国内外防粘釜技术的发展情况，黑龙江齐化化工有限责任公司进行防粘釜技术改进后可达到50釜以上清釜1次，仅此一项可创效益150万元/a。     

105m~3聚合釜粘釜原因及解决措施

简单介绍了105 m3PVC聚合釜的特点,具体分析了105 m3PVC聚合釜粘釜及釜顶冷凝器易堵的原因,并提出了相应的解决措施。     

防粘釜喷涂技术在127m^3聚合釜上的应用

介绍了不同防粘釜剂在聚合釜上的应用。结果表明：NOXOLWSW（1）对釜壁有特殊部位防粘釜效果良好;（2）对反应体系及PVC树脂质量无不良影响;（3）用量少且无毒,有利于环保;（4）粘釜减轻,有利于釜温、釜奔流控制,保证安全。除了对防粘釜剂进行对比选择之外,防粘釜剂雾化喷涂技术的进一步完善对防粘釜效果也起到了推进作用。经过对8台聚合釜全线改造后,目前各牌号聚氯乙烯树脂的月优级品率可达到93％,为公司改造了可观的质量效益。     

防粘釜喷涂技术在127m~3聚合釜上的应用

介绍了不同防粘釜剂在聚合釜上的应用。结果表明 :NOXOLWSW (1)对釜壁及特殊部位防粘釜效果良好 ;(2 )对反应体系及PVC树脂质量无不良影响 ;(3)用量少且无毒 ,有利于环保 ;(4)粘釜减轻 ,有利于釜温、釜压控制 ,保证安全。除了对防粘釜剂进行对比选择之外 ,防粘釜剂雾化喷涂技术的进一步完善对防粘釜效果也起到了推进作用。经过对 8台聚合釜全线改造后 ,目前各牌号聚氯乙烯树脂的月优级品率可达到 93 % ,为公司创造了可观的质量效益     

PVC聚合釜防粘釜技术探讨

论述了PVC聚合釜防粘釜技术的机理及选择防粘釜剂的技术要点。     

PVC生产中粘釜物的成因及防粘釜剂的应用

分析了ＰＶＣ生产中粘釜物的来源及减轻粘釜的方法。具体介绍了ＳＰＪ－ＦＡ防粘釜剂的性能及使用方法。     

有挡板悬浮聚合搅拌釜的粘釜规律

在有机玻璃釜中,以冷模方法研究挡板条件对粘釜量及其分布的影响。发现挡板系数在0.1相似文献   

70m~3聚合釜的防粘釜及清釜技术改良

通过研究聚合釜粘釜的主要原因和防粘釜技术,改良了涂釜的雾化方法和清釜技术。改进后聚合釜运行正常,降低了防粘釜剂和纯水的用量,缩短了清釜周期,提高了PVC树脂产品的产量和质量,年净增效益可达29万元。     

气压釜的变形与撕裂失效分析

气压釜使用5个多月即发生变形撕裂事故。采用化学成分分析、材料硬度测试、金枉检验分析方法,对气压釜变形撕裂进行了分析。检验结果表明气压釜材质相符,撕裂区域硬度异常并发生了再结晶过程。检验结果与事故发生时气压釜内压力的变化过程表明,长期积累在气压釜顸部增塑剂过多是气压釜撕裂失效的主因。     

夹套容器设计中的温差应力问题

应用外压和轴向压缩同时作用下的安全工作条件,对某夹套设备进行设计计算分析,说明了温差应力对外压容器失稳的影响,并提出在设计中应考虑的问题和解决方案。     

塔式容器用轴式吊耳的校核计算

阐明塔式容器吊耳校核计算的重要性,并通过对塔式容器吊装过程中的两种危险状态的受力分析,给出吊耳、设备本体及焊缝的强度计算方法及校核条件。     

刍议压力容器的无损检测技术

压力容器长期间且持续性的使用将致使其使用性能极易受到外界环境条件相关因素的影响,由此可能导致压力容器处理腐蚀、开裂甚至是损毁等质量问题。为最大限度的确保压力容器运行作业的安全性与可靠性,有必要对其进行系统化的无损检测。本文依据这一实际情况,以无损检测技术为研究对象,着眼于压力容器运行实际情况,从压力容器无损检测技术分析以及超声检测技术在压力容器无损检测中的实践应用分析这两个方面入手,围绕压力容器的无损检测技术这一中心问题展开了较为详细的分析与阐述,并据此论证了无损检测技术的应用在进一步提高压力容器运行质量、运行安全性以及运行可靠性的过程中所发挥的至关重要的作用与意义。     

Liquid flow circulating within an unbaffled vessel agitated with an unsteady forward–reverse rotating impeller

Liquid‐phase mixing is a common operation, often performed in vessels using mechanically rotating impellers. To enhance axial mixing the vessels are generally equipped with baffles; however, in industries where cleaning the vessel interior is a major concern, i.e. food and pharmaceuticals, and crystallization, where baffles can disturb particle growth, unbaffled vessels are preferred. One method of agitation in unbaffled vessels is an impeller that periodically changes either the direction or rate of rotation: so‐called unsteady rotation. For use in an enhanced agitation vessel, an agitation technology using an unsteady forward–reverse rotating impeller in an unbaffled vessel was investigated. Such unsteady agitation is expected to enhance mixing. However, knowledge of the liquid flows in such an apparatus remains elusive. Thus an aim of this work was to characterize the circulation flow in such a system. Circulation by a disk turbine impeller with six flat blades was studied through examination of tracer particle trajectories. Images showing flow patterns with the forward–reverse rotating impeller resembled those obtained with a unidirectionally rotating impeller in a baffled vessel. The pattern was characterized by a circulation loop whose pathway exits from the impeller rotational region and returns to that region past the wall and bottom of the vessel. Time‐series particle tracking velocimetry (PTV) images obtained during one forward–reverse rotation of the impeller showed that the flow near the vessel wall reduced the periodic fluctuation downstream and that a flow that was almost independent of time was induced near the vessel bottom. For the flow from the bottom to the impeller, unsteadiness was provided by proximity to the impeller. Based on the intensity distribution of the unsteady flow produced by this type of forward–reverse rotating impeller within the vessel, the unsteady flow was shown to have the potential to reach the region near the vessel wall. Copyright © 2010 Society of Chemical Industry     

压力容器制造CAPP系统的研究开发

简要分析了压力容器制造工艺设计现状,介绍了压力容器制造要求和质量检验的主要内容,讨论了制造工艺设计内容、要求和流程,压力容器CAPP系统的基本要求。提出一种基于数据库的压力容器CAPP系统结构,包括:工艺设计、系统管理和资源库管理三大部分。采用VB编程,开发了基于开放式数据库的压力容器制造CAPP软件系统,可以完成所有压力容器制造工艺设计。经企业实际应用,该CAPP软件系统显著加快了工艺设计速度和效率、提高了设计质量和继承性,为工艺设计标准化和最优化及企业信息化建设创造了条件。     

对搪玻璃设备使用中玻璃层破损的探讨

从两大方面对搪玻璃设备使用中玻璃层破损进行探讨,即搪玻璃设备使用介质;搪玻璃设备部件:搅拌器、温度计套管、夹套、内罐体、机械密封、管口、附件。     

Experimental determination of the optimal geometry of baffles for heat transfer in an agitated vessel

Experimental determination of the optimum values of geometrical parameters of baffles for heat transfer in a jacketed agitated vessel is the purpose of this research. The influence of the geometrical baffle parameters (number, width, length and distance between the lower edge of the baffle and the bottom of the vessel) upon both power consumption and heat transfer was examined for an agitated vessel with an inner diameter of 0.45 m. The experiments were performed with a disc turbine, a pitched-blade turbine and a propeller. An experimental design strategy was used in this research. The results of the experiments were approximated analytically. Based on the optimization criterion, an agitated vessel equipped with a disc turbine and optimally designed baffles is proposed as the most advantageous for heat transfer processes.     

压力容器封头韧性劣化原因分析及处理

本文通过压力容器封头制造中材料韧性出现劣化的案例,分析了其中原因,并做了相应处理。为压力容器外协、外购件的制造和加工提供借鉴。     

刮壁浆在槽式釜的传热研究

针对结刮壁搅拌槽壁面的传热提出渗透－对流模型。运用在搅拌浆上安装热电偶的测温方法，考察了刮壁搅拌槽中的温度分布情况，实验结果支持了渗透－对流模型。当Ｒｅ＞１００，Ｒｅ·Ｐｒ＞１０６时，刮壁残余层对壁面传热有明显影响，随着Ｒｅ的进一步提高，刮壁槽壁面的传热系数增加缓慢，关联得到Ｒｅ＜１００，８０００＜Ｐｒ＜１８０００时刮壁槽壁面传热系数的经验关联式。