加氢进料泵管道设计探讨

加氢进料泵作为加氢装置中最重要的动设备之一,其管道设计对泵的长周期运转以及装置的生产运行起着重要作用。加氢进料泵出入口管道的管径大、压力等级高,且泵出入口管嘴受力要求严格,是装置中配管设计的难点。结合某石化210万t/a蜡油加氢裂化装置中加氢进料泵的管道布置及支架设置,对加氢进料泵的管道设计进行了探讨和分析。     

泵的布置及管道设计

泵是石油化工装置中最普遍的设备,做好泵的布置及其管道设计工作显得非常重要。本文结合相关标准规范和文献资料,对泵的布置及附属管道设计要求作了简要概述。对泵的布置主要介绍了主要布置方法、泵的间距、基础高度和大小等;对泵的配管主要介绍了泵的入口、出口及辅助管线的设计。     

泵的布置及管道设计

泵是石油化工装置中最普遍的设备,做好泵的布置及其管道设计工作显得非常重要。本文结合相关标准规范和文献资料,对泵的布置及附属管道设计要求作了简要概述。对泵的布置主要介绍了主要布置方法、泵的间距、基础高度和大小等;对泵的配管主要介绍了泵的入口、出口及辅助管线的设计。     

FCC装置油浆泵及回炼油泵的入口管道设计

随着催化裂化装置日趋大型化的情况下,装置占地面积、设备直径及管道直径等都随之变大。油浆泵和回炼油泵的管道布置是本装置的设计难点之一。通过对设计过程的总结和研究,对油浆泵和回炼油泵的布置和入口管道设计提出新的方案及并对该管系的重要支架设计进行探讨。     

MTO装置低温介质泵管道设计

泵作为石油化工装置中流体输送的主要机械之一,是保证装置正常运转的重要设备。MTO装置中由于其产品烯烃需要在低温状态下进行输送,用到大量的低温介质泵。本文以某厂100万t/a DMTO装置塔回流泵的配管设计为例,对低温介质泵的平面布置、进出口及辅助管道走向布置以及管道支架布置等方面进行一些总结和探讨。     

关于石油化工装置工艺管道设计的探讨

在石油化工装置中,管道设计是主体专业,管道设计的依据与管道设计的内容基本相同,怎么样才能设计出既安全又合理的布置是现在石油化工装置面对的一大难题。本文通过对管道材料和分级、塔的管线设计、泵的管线设计、冷换设备的管线设计四个方面进行分析与阐述,对石油化工装置工艺管道设计进行了探讨,将其中需要注意的事项进行明确的提出,希望能为工艺管道的设计提供一些帮助。     

塔底热油泵的管道设计探讨

泵在石油、化工等装置中占有重要的地位。泵管道设计是否合理直接关系到泵的正常运转,关系到装置的投产、运行和效益。本文从塔底热油泵的管道设计、管道应力及支架选择等方面介绍泵在管道设计中需要注意的一些问题。     

泵的布置及管道设计探讨

泵在石油化工装置中的应用十分广泛,泵的管道设计是否合理直接关系到泵的正常运转和整个装置的运行。本人在从事设计过程中,对泵的布置及设计有了一些想法,因为设计过程还是处于理论阶段,可能在此过程中有些小细节容易被设计者忽视,由此写了本篇文章希望能够对读者朋友有所帮助。本篇文章中主要阐述了个人在泵的平面布置方面的一些个人见解,还有在泵出入口和辅助管道的设计方面的需要注意的事项。     

高温泵的配管及应力计算

在管道设计中我们还经常遇到高温、高压机泵的管道布置,较高的温度使管道产生了较大的二次应力,同时对设备管嘴也产生了较大的力和力矩,在管道布置时要着重考虑管道及管嘴的应力计算。而针对多种工况下运行的多台机泵组又要分别进行应力计算,再统一考虑管系的补偿及支撑。     

苯的贮运设计

介绍了苯在贮运过程中须注意的问题及相应的安全措施，并对有关设备，泵、管道等进行了设计计算。     

应用CFD技术预测管道离心泵性能

采用多参考坐标系和标准k-ε湍流模型,应用流体动力学软件FLUENT对IS125型管道离心泵的内部流场进行模拟计算,得到内部的压力和流动速度分布,进而计算出泵的特性曲线,并与试验性能曲线进行了对比。对比结果表明,应用CFD技术预测管道离心泵性能具有较高的精度和工程应用价值。     

Pressure pulsations in the piping of reciprocating pumps

Pressure pulsations in hydraulic systems, generated by reciprocating pumps, can cause serious problems with regard to plant safety and reliability. In particular, fatigue problems arise in high-pressure piping systems. The available knowledge is not sufficient for an accurate computation of pressure peaks in the piping of reciprocating pumps. A number of calculation models are available which, however, neglect both fluid compressibility and friction. This contribution presents a calculation method which allows a precise modelling of various pump installations. Comparison of calculated and experimental data shows a good agreement and provides a validation of the computational model.     

两开一备布置的泵进出口管道优化设计

本文就某装置中两开一备布置的泵进出口管道的布置和支架设置进行阐述,其应力结果中泵嘴子受力和力矩满足API Std610的要求,并提出会出现的问题及处理的方法。为今后类似布置的泵的管道设计提供参考依据。     

化工装置中液体罐区的工艺设计

介绍在化工装置液体罐区的工艺设计中贮罐和泵的选型、安装布置和配管的方法，并简述控制室、变配电室的布置原则。     

Experimental Characterization of a Flow‐through Pulsation Damper Regarding Pressure Pulsations and Vibrations

Pressure attenuators, especially side branch bladder‐type accumulators, for suppression of pressure pulsations in industrial fluid applications are not suitable for higher‐pressure pulsation frequencies, e.g., with centrifugal pumps. Accumulators of the flow‐through‐type promise a faster response time and thus a wider application range. The damping performance of a flow‐through pressure accumulator with respect to fluid pressure pulsations and the resulting structure‐borne noise was investigated. The influence of varying pulsation frequencies, damper precharge pressure, and damping effect throughout the piping system was evaluated. Experiments were performed in an industrial‐scale closed‐loop test facility, with both pressure pulsations and piping vibrations in the focus. The damper, characterized by means of high‐speed video analysis, proved to be capable of damping effectively the pressure pulsations and piping vibrations induced by a centrifugal pump.     

Druckschwingungen durch oszillierende Verdrängerpumpen in Rohrleitungssystemen

Pressure Pulsations Caused by Reciprocating Pumps in Piping Systems. The safe design of piping installations for reciprocating pumps requires proper knowledge about the pump/installation interaction. In many cases critical resonance effects can be avoided by proper piping geometry or improved pump performance with respect to the volumetric efficiency (primary measures). Normally it is necessary to use various secondary dampening methods which can influence the acoustics of the piping system. Several examples of experimental computer simulations of damper action – upstream and downstream – are presented for fluidand gas-filled damper versions. The influence of entry geometry of the dampers is explained, hints on the proper geometry of the entries are given and the effects of various dampers and their influence on the total acoustics are discussed. Special reference is made to the effect of orifices as dissipative and acoustic elements in piping systems. The investigation shows the importance of analyzing of the total system of pump, piping installation and vessels or reactors and the application of computer simulation for piping design.     

Piping diameter optimization for high viscosity polymers in non-isothermal flowOptimierung von Rohrdurchmessern in Rohrleitungssystemen für hochviskose Flüssigkeiten im nicht-isothermen zustand

A simple optimization method of piping diameters is proposed for high viscosity polymer melts usually found in the synthetic fibers industry. Such fluids, e.g. polyester melts, exhibit a strong dependence of polymer degradation on both temperature and residence time in piping systems.Pressure losses in tubes and mechanical losses in (gear) pumps lead to an increase in temperature; these, and residence time, are taken into account in minimizing the expression for polymer degradation, leading to optimum tube diameters.A practical example is shown.     

Parallel Operation of Centrifugal Pumps: Effects of Rotational Speed Differences due to Motor Slip

In industrial plants, centrifugal pumps are frequently operated in parallel configuration, not least for redundancy and operational reliability reasons. However, regarding the resulting pressure pulsations and energy consumption, this operation mode has so far not been in the focus of scientific studies. The object of the present article is to clarify the effect of parallel operation with respect to the observable pressure pulsations. Measurements were carried out with two identical centrifugal pumps operating in parallel mode in an industrial‐scale closed‐loop piping system. The results suggest that, regarding both the resulting pressure pulsations and the operating point of each pump, this operation mode is quite sensitive to smallest rotational speed deviations as they may occur due to different motor slip. The results indicate furthermore that, for minimum pressure pulsations, equal power consumptions of the two pumps are crucial, but not necessarily equal rotational speeds.