The reconstruction status of KDN-1000 deep freezing nitrogen making machine was presented and the output increased from 1000 m3/h to 1600 m3/h after the reconstruction.It summarized the problems in commissioning and solving methods,and compared performance before and after the reconstruction.

The phase holdup caused by the velocity difference in the two-phase flow is one of the most important reasons for the composition shift of multicomponent mixtures.A model for calculating the composition shift was developed in this paper.With this model,the composition shift was analyzed at a distrib

A gravity assisted cryogenic loop heat pipe (LHP) using nitrogen as working fluid is being developed for future application. This paper presents a design of cryogenic LHP configuration and corresponding test system. The startup and working performance of the cryogenic loop heat pipe was studied over

When the two expanders of turbine were shifted in April, it was detected that the higher pressure of outlet, lower and inadequate refrigeration on the expander No.Ⅰafter it was running . These reasons led to the running of Air Separation Unit. After analysis of the trouble and disassembly examinatio

北Ⅰ-1深冷装置投产后,随着运行时间的增加,不断暴露出一些问题,如润滑油分离器分离效果不好,程控阀关不严,以及分子筛粉化等问题严重影响干燥器系统的正常运行。分子筛粉化对装置的影响涉及原料气的增压系统、再生气系统及低温制冷系统。为确保深冷装置的安全平稳运行,应采取如下措施:平稳操作,通过调整升压和降压阀开度控制升压和降压速度;完善干燥器程序;选用适合装置性能指标的分子筛;增加分子筛量。分子筛采用抽空的装填方式装填,或采用密相装填技术提高分子筛的装填量和装填均匀性。

本文提出了对中红外双异质结构光伏探测器的探测率优化研究。本文把关于暗电流的简单近似分析表达式同全数字计算作了比较,并阐述了对支配暗电流的物理机制的认识。从简单的p-n结到完整的双异质结构,分析工作是逐步进行的。分析内容包括温度、双异质结构中的势垒带隙能量以及激活区中的掺杂对扩散和产生复合机制的影响。文中对如何通过控制激活区的掺杂来提高双异质结构光伏探测器的性能作了说明。尽管如此,器件加工中出现的难点仍限制着器件的发展。例如,用于蚀刻法来加工InAs0.91Sb0.09p-i-n光伏探测器会引起台面边缘严重漏电。通过先用离子束蚀刻然后用化学蚀刻,器件的R0A特性可在低温下提高n个数量级。这种加工

<正>潜心创研高科技产品1993年聂启明承建民营高科技企业——天利公司,并担任董事长。他确定了“切入我国制药机械的薄弱环节,研发具有国际先进水平的产品,填补国内空白,使我国制药机械产品走向世界”的企

介绍了在原料药生产使用的一种新型冷源“深冷机组”,其完全替代目前在制药厂使用的液氮制冷,同时可以大幅降低原料药生产的运行成本。

把如今的绝缘材料用于正确设计的潜液深冷场合甩的电动机中,无氧化、无发热和无电离腐蚀,可运行于几乎达到完美的环境条件下。

对常规大型深度冷冻装置中重要的液氧泵工艺操作性启动调试的程序进行了详细介绍,提出了启动调试中的注意事项。

结合中原油田天然气处理厂的实际情况,介绍了中压深冷天然气处理装置经常出现的冻堵现象,分析了装置冻堵产生的原因及主要冻堵物质,并提出了几项切实可行的防冻堵措施。

<正> 中国是全球第二大化学原料药生产国和主要出口国,化学原料制造业是我国医药行业的一个主要支柱。在20世纪90年代中期,由于抗生素、维生素国际市场的滑坡,对我国的相关制造业带来了较大的冲击。但国内企业近年来通过不断地进行技术更新改造、开发市场,在各种产品的系列化纵向研究以及改进生产工艺、

On the basis of the construction of a cryogenic liquid transportation tank, introduce the operationof liquid filling and liquid discharge, also introduce the method of replacement and routine maintain, so theconsumer can use the tank safely and manage it well.

<正>温州亚光天宜科技有限公司是专业制造低温制冷机组的厂商。该公司生产的深冷机可广泛用于制药、化工行业的低温合成反应。其特点:(1)采用独特设计,大幅提高了复叠式机组中低温机组的低温回油效率,无需采用庞大的回油装置或外置加热装置,系统性能运行上万小时不衰减,同比其他产品节能5%以上。(2)系统设计和组装中选用国际知名品牌的部件,确保系统的可靠性。其中:压缩机为日本前川(MYCOM)公司或德国比泽尔

The stainless steel 0Cr18Ni9, made in China, is utilized in installation construction of a natural gas cryogenic facility. Under the deep cold condition of -196℃, the low temperature impact toughness of welding seam is difficult to be guaranteed. So 4 kinds of welding technical schemes are set down

With highly increased of LNG using in China, we now have the example with low temperature storage tank in Korea hereinafter,to have a preliminary research for its main structure and relative layout.

The details of a new cryogenic water-trap for high vacuum applications based on a recuperative mixed-refrigerant refrigerator were disclosed. While used with a molecular turbo vacuum pump of 600 L/s pumping speed, the cryogenic water-vapor trap was driven by an oil-lubricated single-stage compressor