谈谈150米~3/时空分塔快速出氧

本文从缩短T_2下降时间、节—1阀的操作、冷凝蒸发器温差的控制,调纯、停车后恢复生产的操作等方面,谈了“150”空分塔加温后开车到送氧为6小时和停车4小时之内冷开车进气10分钟即可送氧的一些体会。表1     

150米~3/时制氧机间断制氧操作法简介

本文介绍了150米~3/时制氧机间断制氧2小时、8小时、32小时,在停车前的操作及步骤,恢复生产时的操作方法及注意事项。     

42天建成50m~3/h制氧厂

<正>山西省忻州市轧钢厂制氧分厂,从邯郸制氧机厂购进一套FON－50/200型空分设备,从1987年3月8日动工,4月20日一次试车成功,氧氮纯度和产量等各项指标都达到设计要求。正常运行高压空气压力可降到17kgf/cm2,氧气流量50m3/h以上。开车7小时可以出氧;间断制氧停车8小时,50分钟即可出氧。     

50米~3/时空分塔临时停车后快速出氧的操作

<正>我厂有一台50米~3/时空分设备,自 1979年投产以来运转稳定,采取间断制氧,达到了“安全、稳定、高产、优质、低消耗”,并摸索出“快速出氧法”。一般在4小时之内冷开车,空分塔经15分钟左右即可送氧(纯度99．5%,流量50~70米~3/时)。下面谈点我们的操作体会。在空分设备停车前,适当地提高压力,将液氧液面升到40~45厘米水柱以上,为下次开车打好基础。停车期间最主要的是保持塔内冷量,为此必须保持塔内压力。在恢复生产时采用“三不动、两增加、一减少”的方法:“三不动”即凸轮开到停车前位置不动;液空节流阀(P-2)开到停车前位置不动;液氮节流阀(P-3)开到停车前位置不动。“两增     

KFS-120型空分设备的操作体会

<正>我厂KFS－120型(20米3/时)空分设备自投产以来运转稳定,氧气产量和纯度都超过原设计标准。氧产量可达 25~30米3/时,氧气纯度 99．8%以上。FL－20/75型分馏塔加温后正常启动9小时就可送氧(设计18小时)。停车6小时之内再开车,5~10分钟即可送氧。现将操作体会浅谈如下:     

首钢氧气厂国产“6000”空分设备板式局部技术改造胜利竣工

<正>由中国空分设备公司承担局部技术改造设计、北京钢铁公司计控室负责仪控部分设计、杭州制氧机厂提供设备、四川空分没备厂提供阀门、首钢安装公司安装、首钢氧气厂负责开车调试的首钢氧气厂国产6000m~3/h空分设备板式局部技术改造,于1990年12月26日零点空分设备正式停车开始检修改造,在首钢各级领导的严密组织、统一指挥下,在各参加改造、检修单位的团结协作、密切配合下,一次试压、裸冷、开车调试成功,1991年1月17日15:15出氧并网,氧气纯度达99.6%O_2,氮气纯度大于99.99%N_2。从空分设备停车改造检修开始至调试出氧,整个工程周期仅用了22天16小时,设备起动时间不到28小时。     

制氧工问题解答(三则)

<正>1．问:我们制氧站的设备运转已有五年多,一直间断制氧,每瓶电耗13度多,加温后重新开车要8~10小时送氧。这么高的电耗,这么长的启动时间,我们认为除去间断开车原因外,没有掌握先进的操作技术也应作为一个重要原因。不知这种解释对否?答:你的理解是对的,间断制氧会增加氧的单位电耗,但是如果不间断生产,把生产出的纯氧放空,对比之下,还是间断生产节省电耗,这件事我们需要作具体分析。操作好坏确实是关键的一个内容,不知你们是否注意到停车的操作窍门。停车前要积蓄一些液体,停车时要尽量减少冷损失,间断生     

浅谈小型空分设备间断停车后快速出氧的方法

在KDON-400/1000型空分设备因故障临时停车前、停车中及重新启动时采取了一系列优化操作,缩短了空分设备间断停车再开车的出氧时间,满足用氧需求。     

浅谈小型空分设备间断停车后快速出氧的方法

在KDON-400／1000型空分设备因故障临时停车前、停车中及重新启动时采取了一系列优化操作。缩短了空分设备间断停车再开车的出氧时间，满足用氧需求。     

氧透高压回流阀操作不当造成停车故障的分析

本文比较详细地阐述了杭氧 3TYS89+2TYS6 0氧透的轴封和轴封差压控制情况 ,分析了操作高压回流阀不当造成氧透轴封差压联锁停车的原因 ,并针对当时情况提出了处理方法     

制氩系统的停运对主塔精馏工况的影响

结合因粗氩塔停运而导致主塔精馏工况恶化的一次故障,分析了停运粗氩塔时主塔精馏工况的变化情况,提出了停运制氩系统时的操作原则。     

Effect of shutdown on styrene removal in a biofilter inoculated with Pseudomonas sp. SR-5

Styrene gas removal was carried out in a biofilter inoculated with a styrene-degrading Pseudomonas sp. SR-5 using a mixed packing material of peat and ceramic under the non-sterile condition. More than 86% removal efficiency was obtained at styrene load of 5-93 g m(-3) h(-1) for 62 days operation period and 78% carbon of removed styrene was converted to CO2. Thereafter, three kinds of styrene shutdown experiments were conducted: (i) air and mineral medium were supplied for 4 days, (ii) complete shutdown, namely no styrene, air and moisture supply was conducted for 3 days, and (iii) only air was supplied for 11 days. When styrene gas was re-supplied after (i) and (iii) shutdown experiments, styrene removal efficiency rapidly recovered, but after (ii) shutdown, recovery of styrene removal was significantly delayed. Supply of air during shutdown period was found to be enough to resume microbial activity to degrade styrene.     

远程紧急停车系统在空分设备中的应用

介绍了紧急停车按钮台的控制原理,详细说明了采用远程I/O方式的空分设备远程紧急停车系统的操作优点,叙述了中央控制室和空分设备就地控制室紧急停车系统的网络配置。     

太钢730t/d空分设备氩系统的快复车操作

太钢 730t/d空分设备全精馏制氩系统在临时停车后冷态启动 ,由于采用了 7点措施 ,使氩系统恢复时间从最初 2 0多个小时缩短到目前平均 13小时 ,最快 8 5小时 ,效果明显     

The design of a highly reliable safety critical emergency shutdown system

An emergency shutdown system (ESD) by its nature should be fail-safe. That is, in case of failure in any of its operations, in order to safeguard human life, property and the environment, it should shut down the plant that it controls. However, a complete shutdown, for example, of a petrochemical or nuclear plant is extremely costly. Therefore, as an alternative, the design of highly reliable emergency shutdown systems should be investigated.The major difference between a shutdown system and other control systems is the degree of tolerable operational integrity. A malfunction in the latter is immediately visible and the system can be replaced by a fully operational one. A shutdown system on the other hand is usually, sometimes for years and hopefully forever, `dormant'. When, however, a true emergency situation arises and real demand is placed on it, it must be fully functional. Reliability is of paramount importance. Therefore, besides applying structured design techniques and improved testability other design methods will also need to be incorporated in the final system in order to increase its reliability.     

膨胀机停车故障分析与处理

介绍一起膨胀机在空分设备热状态开车过程中因发生喘振而停车的故障,故障造成转子和定子等个别部件严重损坏。对故障原因进行了分析,并介绍了所采取的相应措施。     

Representing context, cognition, and crew performance in a shutdown risk assessment

This paper presents a potentially practical treatment of dynamic operator-system interactions. The approach employs a dynamic event tree framework to explicitly address plant dynamics, system indications, crew-plant interactions, time available, crew cognition, errors of commission (mistakes), and multiple planning and diagnosis possibilities. The approach is applied in an analysis of a hypothesize medium break loss of coolant accident for a test reactor that occurs during plant shutdown. This transient was selected on the basis of: a significant cognitive component being present, high consequences being associated with operator actions, and the importance of event timing to scenario progression. The results presented show how quantitative risk predictions are affected by the treatment of dynamics, and demonstrate how non-proceduralized recovery actions and a number of performance shaping factors (e.g., crew experience, stress, and confidence) can be explicitly treated. Insights and lessons learned regarding the performance of a dynamic assessment are also presented.     

Numerical modeling of startup and shutdown transients in reciprocating compressors

Several phenomena that affect energy consumption, noise level and reliability of compressors are associated with transient effects that occur during the compressor startup and shutdown. This paper presents a simulation methodology, experimentally validated, developed to analyze the compressor in such transients. Because the time scale associated with the compressor thermal behavior is much larger than that related to the mechanical physics, a thermal equilibrium condition has been considered herein for convenience. Results for valve displacement, piston motion, pressure in the compression chamber and resistive torques are provided to illustrate the application of the methodology and to assist an understanding of the physical aspects that affect the compressor performance throughout the startup and shutdown. It is observed that the dynamics of suction and discharge valves are greatly affected. Moreover, the model is employed to estimate the minimum voltage required for the compressor startup as a function of the equalized pressure and the auxiliary coil actuation time.     

地线断路造成KL-15型制氧车停机原因分析

介绍了KL 15型制氧车运行中途停机的特殊故障现象 ,分析由于供电线路的接地线断路 ,地面电阻逐渐增大而引起停机 ,指出了在空分生产过程中接地线的重要意义。     

循环液氩泵电流过载保护停车分析与处理

介绍循环液氩泵因电流过载保护而停车的故障,分析故障原因并阐述处理过程。