低压氧液化流程与中压氧液化流程的比较

简单介绍了现有钢厂用液化设备流程的分类 ,主要从液化流程本身的特点和降低液化装置能耗两方面来探讨低压氧液化流程和中压氧液化流程。     

低压液化循环与中压液化循环两种流程评价

介绍了国内液化装置的现状以及液化装置两种主要流程 (低压液化循环与中压液化循环 )的特点 ,并对这两种流程的一次性投资、部机性能、能耗及性价比等进行了比较     

氦液化器用的300升外设液化槽

研制成的300升氦液化槽，采用了高真空气体屏的多层绝热结构，内容器与外壳之间应用了多层弹性支承结构。除颈管之外。容器还另外装有一个对外输液装置，保证在容器接入液化系统之后还可以对外输液。实测该液化槽的日蒸发率小于1%。     

天然气液化装置的流程选择

介绍了级联式循环、混合制冷剂循环和膨胀机循环的特点,讨论了进行流程选择需要考虑的关键因素,着重分析了中小型陆上装置和新型海上浮动装置的流程选择.分析表明,膨胀机循环适合于小型装置,经过改进的多级MRC循环则适于中型LNG装置.     

中压循环液化装置论述

文章介绍空分设备所配中压循环液化装置的两种流程———带冷冻机的中压循环液化流程与带高温膨胀机的中压循环液化流程及其特点 ,最后阐述了配置部机的要求与选择。图 2     

减小液化装置氧氮换热器温差的优化操作

YPON-12500/7130型液化装置氧氮换热器中抽管道不畅通,导致氧氮换热器温差过大,冷量损失严重。通过优化操作流程,使氧氮换热器中抽管道畅通,不仅解决了氧氮换热器温差过大、冷量损失大的问题,而且大大提高了设备运行的安全性。简介液化装置流程,分析优化操作的具体措施,通过计算分析取得的经济效益。     

大型空分设备内部液化装置流程组织与应用

以安钢制氧厂23500m3/h空分设备为例,详细介绍大型空分设备内部液化装置的流程组织、设备特点和操作要点,并对空分设备多种工况下的重要产品指标进行了比较和分析,最后阐述了内部液化装置的重要应用——实现空分设备快速开车的操作步骤和应用效果。     

G—M/J—T闭式循环4.5K氦制冷液化装置的研制与试验

介绍了G—M/J—T氦制冷液化装置的流程设计、主要部机、调试和试验结果,以及结论。该装置最低温度达到4．4K,制冷量大于1．7W/4.5K。图6。     

混合制冷剂液化天然气流程的设计计算

液化天然气技术已成为天然气工业中一个极其重要的部分,本文着重研究了发展前景较好的混合制冷剂液化天然气流程。因混合制冷剂液化天然气流程的计算复杂,在参阅了化工流程模拟计算软件的基础上,采用设备模块化的方法,设计了一套用于设计和计算流程的程序。用该程序设计和计算了“开发利用东海天然气”项目,获得了比较好的结果。     

低温液化气船的制冷装置—再液化装置

本文介绍了低温液化气船上的特殊的制冷装置——再液化装置，分析了再液化装置的功能、基本类型以及基本要求；介绍一个典型的再液化装置流程及设备组成     

氧氮液化设备低温液体泄漏的原因分析与处理

简介3000m3/h氧氮液化设备低温液体泄漏的现象,介绍了低温液体泄漏后从扒砂到漏点查找和处理的全过程,提出了预防低温液体泄漏和检修时发生"喷砂"事故的措施。     

Performance improvement of nitrogen expansion liquefaction process for small-scale LNG plant

Liquefaction of natural gas is usually a kind of high energy consumption process. Therefore, any performance improvement of the liquefaction process will definitely reduce the energy consumption. Nitrogen expansion liquefaction process is regarded as a suitable process for small-scale LNG plant due to its simplicity, quick startup and convenient maintenance. However, the disadvantage of the process is high-energy consumption. An efficient way to lower its energy consumption is to add a precooling cycle. In this paper, two different precooling cycles including propane precooling cycle and R410a precooling cycle are proposed to the nitrogen expansion liquefaction process to improve the liquefaction process performance. Unit energy consumption as an objective function is optimized in terms of several key operating parameters. Based on the optimization results, the effects of the liquefaction rate and methane recovery rate on the process performance are investigated. The thermodynamic analyses are adopted to the processes as well as the two precooling cycles. Furthermore, the exergy analyses of the main equipment are also presented and discussed. The results show that the unit energy consumption for the nitrogen expansion process with R410a precooling and with propane precooling reduce by 22.74% and 20.02% respectively, compared with nitrogen expansion process without precooling.     

宝钢2~#液化装置工艺及其调节功能特点分析

主要分析了宝钢股份公司新投产的 2 #液化装置的工艺和功能特点 ,并介绍了该装置投运以来所发挥的重要作用。     

The liquefaction cycle and the role of drainage in liquefaction

In this work the liquefaction cycle is introduced as a framework to describe the coupled processes that take place in fluid-saturated granular media that lead to liquefaction. The modular formulation of liquefaction makes it possible to test the various processes that contribute to liquefaction separately, and to assemble different formulations of the relevant physics into a numerical model for liquefaction. This view on liquefaction is used here to assess the role of drainage in liquefaction. We present a simple scale analysis of the role of drainage. A numerical implementation of the liquefaction cycle shows, however, that the scale analysis is deceptive for the case when strong spatial variations in the permeability inhibit fluid migration. As an illustration the numerical model is used to quantify the imprint of a low-permeability layer on the liquefaction behavior.We greatly appreciate our conversations with Masami Nakagawa and Vaughan Griffiths about this work. The critical and constructive comments of two anonymous reviewers are very much appreciated. The visit of Annemieke van den Beukel to Golden was supported by the Molengraaff fonds, the Schuurman Schimmel van Outeren Stichting, the Stichting Dr. Hendrik Mullers Vaderlandsch Fonds, and the Trajectum Fonds.     

高压低温充氧车的研制

在某些特殊场合 ,需要用到高压 (压力达 35MPa)的氧气或氮气 ,高压低温充氧车的研制就是为了满足这种特殊需求。为了在高度、容积受限制的移动工程车上实现液体泵正常工作 ,需要解决几个问题 :液体贮槽蒸发率必须严格控制 ,泵头和液体管路置于冷箱中 ,贮槽增压送液等。通过实际试车 ,该设备能较好地满足特殊需求     

真空管道垃圾收集系统关键工艺参数优化设计

基于水平真空管道内空气一固体垃圾气固两相流压力损失计算关系式，并根据计算结果，探讨压力损失、气流速度及垃圾与空气量输送比这三个关键工艺参数的关系；最后提出一种计算经济风速及经济气固输送比的方法。本研究成果对真空管道垃圾收集工艺及装置选用及设计有指导意义。     

空分设备氧气外送流程的改造总结

当后续生产用氧量减少时,空分设备出塔氧气的压力足以满足后续生产用氧压力要求,此时若再用氧压机对出塔氧气进行压缩后供氧,会造成很大的能源浪费。文章对氧气直接外送方案进行了可行性分析,介绍了氧气直接外送的改造方案、经济效益以及改造后的操作变化。