液环式氢气压缩机选用的探讨

对采用液环式YLJ系列氯气压缩机加压输送氢气进行了分析,认为氢气与氯气热力特性不同,并且两种液环式压缩机采用的液环介质也不相同,因此气体压缩的热力过程、给定的技术参数的运行参数、几何尺寸也完全不同。这两种压缩机不应相互通用,并建议发展液环式氢气压缩机系列。     

SK型液环式压缩机简介

在氯碱生产中,氢气输送可以根据用氢部门对压力的要求,选用液环泵或罗茨鼓风机。如氢气压力要求在0.06MPa或稍高时,可用液环泵;若不要求较高压力或设有湿式气柜时,则可用罗茨鼓风机输送,用于氢气输送的液环泵,常见的是SZ型,也有用纳氏泵     

1,4-丁二醇装置国产液环压缩机的应用

液环压缩机应用于BDO生产装置中原料气体—乙炔气的加压输送工位.在此工位中乙炔气体经过液环压缩机2次加压后输送至炔化反应装置生产丁炔二醇,之后经加氢制得BDO.由于乙炔气体属于易燃易爆类气体,并且在高压下的物理特性不稳定,容易发生其他化学反应,从而对设备的可靠性及安全性要求较高,另一方面对机组的附件配置及自动化程度要求...     

离心式氯气压缩机与液环式气体压缩机的性能比较

本文从技术经济,负载能力,操作稳定性及使用条件等几个方面比较了离心式氯气压缩机与液环式气体压缩机的优缺点。     

氯碱系统中氯气压缩机的选型

阐述了在氯碱系统中使用的两种类型压缩机(即液环式压缩机及离心式压缩机)选型的有关问题，扼要地叙述了两种压缩机的特点，在选型过程中从技术先进性，选型的经济性，运行维护难易性等方面进行了分析对比；最后提出建议：在6万t／a以下规模的烧碱装置中，应选用液环式压缩机；10万t／a以上规模选用离心式压缩机。     

2BG115型液环式氯气压缩机在液氯生产中的正确使用

通过简述高温高压法生产液氯的工艺，介绍了2BG115型液环式氯气压缩机的结构及工作原理，分析了第二级压缩部件易损的原因。硫酸的工作温度高是造成设备腐蚀的最直接、必然的原因，应加强硫酸工作温度的控制，保证在合理的控制点下工作。     

用于氯气输送的新型YLJ—Ⅲ型氯气压缩机

氯碱生产过程中,电槽中的盐水通过电解产生的氯气要不断地抽出,经干燥和压缩后再送到液化工序。而作为抽吸和压缩输送的装备目前国内大型氯碱厂已普遍采用氯气透平压缩机,其特点是单机能力大(可满足年产10万t烧碱产量的需要),出口压力高,运转平稳,可减少液化时冷量的消耗。但氯     

液环式压缩机的特点及性能对比

介绍了液环式压缩机的原理、技术特点、应用范围,重点说明了国外引进液环式压缩机与国产机型相比所作的技术改进和技术优点,建议国内生产厂家对这种型式的压缩机进行研究和开发以替代进口.     

液环式压缩机的并联运行

主要阐述了液环式压缩机多机组并联工作和多机组并联时对并联单机组的要求,并对多机组并联运行和单机组运行作了比较,提出应该开发大容量液环式压缩机的建议.     

LNG工厂中的BOG处理工艺浅析

我国已经进入LNG行业快速发展的时期,建设了100余座LNG工厂。BOG气体处理工艺是LNG工厂工艺技术中的关键工艺和难点技术。文章介绍了BOG增压外输工艺中常用的两种压缩机的特点,同时介绍了两种BOG加热工艺的优缺点,为LNG工厂的优化建设提供参考。     

硝酸装置“四合一”机组运行实践

双加压法硝酸装置中的“四合一”机组是整个稀硝酸装置生产的“关键”设备,喘振是压缩机组的主要缺点,以新建装置的生产实践为例,对喘振原因、影响因素、喘振消除以及在生产中应注意的事项加以阐述。     

基于FLUENT的含砂气体在压缩机内流场模拟与研究

随着气田的开采,进口压力逐渐降低,气井的出沙现象也越来越严重.在天然气增压过程中,砂粒的存在会使压缩机内积垢严重,缸体磨损厉害、压缩机管道振动较大,现场噪声大,严重阻碍了生产机组安全运行.以西北某气田含砂气质为研究对象,建立压缩机流场模型,对不同粒径的砂粒在压缩机内的流场运动进行研究,分析了不同粒径不同砂含量和不同进气温度下的残留率,为保证压缩机高效安全运行,使低压气井得到有效开发提供条件.     

基于增压吸收的吸收式蓄能装置的性能分析

吸收式蓄能技术具有蓄能密度高、热损失小等特点,是一种具有发展潜力的蓄能技术,但目前的技术尚存在吸收效果差、效率不高等问题。提出基于增压吸收的吸收式蓄能方法,并阐述其装置的工作原理和特点,通过数学模型研究在不同工况下增压对其热力学性能的影响规律。结果表明：当蒸发温度与发生温度越低、冷凝温度越高时,增压器改善吸收式蓄能循环的性能系数（COP）越明显;与无增压吸收式蓄能循环相比,蓄能密度（ESD）得到提高,当增压比为3时,其ESD可提高30%～295%。     

Correlation of hollow and solid cylinder dynamic pressurization tests for measuring permeability

An experimental apparatus and analytical derivation are developed for quantifying the permeability of cementitious materials using dynamic pressurization of a hollow cylinder. Experimental results from the newly developed hollow dynamic pressurization technique for measuring permeability are then compared to results obtained using the solid dynamic pressurization test. The measured permeabilities obtained from testing Vycor^® glass and hardened cement paste indicate close agreement between the two test methods, which supports the validation of the hollow dynamic pressurization test as an accurate and repeatable method for measuring the permeability of cementitious materials. Three different pore fluids with widely varying viscosities were tested, each yielding equivalent intrinsic permeabilities. Additionally, the permeability values from this study agree reasonably well with relevant values presented in the recent literature.     

High‐pressure induced formation of isotactic polypropylene mesophase: Synergistic effect of pressure and pressurization rate

The crystallization induced by high pressures up to 2 GPa was studied for isotactic polypropylene (iPP) using wide angle X‐ray diffraction, small angle X‐ray scattering, and atomic force microscopy methods. The iPP mesophase can be induced at 200°C by high pressures with fast pressurization rate. A pressure–pressurization rate kinetic phase diagram of mesophase and γ‐phase was established to systematically analyze the influences of pressure and pressurization rate on crystallization polymorphism. Under pressure not higher than 0.75 GPa, only γ‐phase is formed, even the pressurization rate reaches 5 × 10³ MPa/s. With increasing pressure to 1.0 GPa, the mesophase is possible to be generated. As pressure further increases to 1.5 GPa and higher, the pure mesophase system can be obtained for pressurization rate above the critical values (about 10 MPa/s). Moreover, the structure of iPP mesophase obtained by rapid pressurization was analyzed and compared with that prepared by temperature quenching. Also interestingly, the pressure‐induced mesophase can transform into γ‐phase by annealing under pressure at 200°C, and the rate of this phase transition is slowed down with increasing annealing pressure. POLYM. ENG. SCI., 59:439–446, 2019. © 2018 Society of Plastics Engineers     

铁矿尾矿加压过滤脱水和压滤脱水的对比试验

介绍了铁矿尾矿分别用加压过滤机和压滤机的脱水试验,通过对两种脱水试验效果的对比,说明用加压过滤机对铁矿尾矿这种料浆进行脱水,效果更好。     

Analysis of solids densification during the pressurization of lock hoppers

Lock hoppers are used to feed solids into high pressure reactor vessels. During the gas pressurization phase of the operating cycle, gas pressure gradients add to the solids stresses caused by gravity, resulting in a gain of density and strength of the solid. The increase of strength may require a larger hopper outlet and, hence, a larger valve at the outlet in order to assure flow without obstructions thus increasing the initial cost and the cost and time of maintenance.Concentric pressurization of a compressible solid from the cylinder walls inward is analyzed. This is a coupled nonlinear diffusion and nonlinear elastic-plastic finite deformation problem in plane strain. The results suggest that the concentric method permits rapid pressurization with little densification.     

神泉白垩系油藏增压注水技术应用及效果评价

本文评价了神泉油田白垩系增压注水的技术应用及效果,论证了增压注水的合理压力及实施后的各种变化。通过增压注水,能够改善该低渗区块的注水效果,使一些吸水差的油层或不吸水的油层得到动用,提高了油井单井产能。