80万t／a戴维甲醇装置磁力泵首次联运故障的原因分析与对策

中国海洋石油化学股份有限公司新建80万t／a戴维（DAVY）甲醇装置采用大功率磁力泵输送介质（在国内甲醇项目中尚属首次）。介绍了磁力泵的基本原理、结构特点和设备参数;分析了磁力泵在甲醇装置首次水联运过程中出现泵体振动等故障的原因;提出了相应的解决措施并取得较好效果,磁力泵振动值下降到4mm／s。     

基于粒子群优化算法和非线性盲源信号分离测量两相流速度(英文)

In order to overcome the disturbance of noise,this paper presented a method to measure two-phase flow velocity using particle swarm optimization algorithm,nonlinear blind source separation and cross correlation method.Because of the nonlinear relationship between the output signals of capacitance sensors and fluid in pipeline,nonlinear blind source separation is applied.In nonlinear blind source separation,the odd polynomials of higher order are used to fit the nonlinear transformation function,and the mutual information of separation signals is used as the evaluation function.Then the parameters of polynomial and linear separation matrix can be estimated by mutual information of separation signals and particle swarm optimization algorithm,thus the source signals can be separated from the mixed signals.The two-phase flow signals with noise which are obtained from upstream and downstream sensors are respectively processed by nonlinear blind source separation method so that the noise can be effectively removed.Therefore,based on these noise-suppressed signals,the distinct curves of cross correlation function and the transit times are obtained,and then the velocities of two-phase flow can be accurately calculated.Finally,the simulation experimental results are given.The results have proved that this method can meet the measurement requirements of two-phase flow velocity.     

具有羧酸官能团的功能性离子液体萃取分离钇的研究(英文)

A new kind of hydrophobic ionic liquids [1-alkyl-3-(1-carboxylpropyl)im][PF6] has been synthesized,and their extraction properties for Y(III) in the nitric acid medium was also investigated.The effects of extractant concentration,equilibrium pH of aqueous phase,salt concentration,temperature etc.were discussed.The results show that this kind of Task-Specific Ionic Liquid(TSIL) needs to be saponified before being used for the Y(III) ex-traction,and the extraction is acid dependent,and the extraction efficiency increases with the aqueous phase acidity decreasing.Furthermore,the loaded organic phase is easy to be stripped;more than 95% Y(III) could be stripped from the loaded organic phase when the stripping acidity is higher than 0.07 mol?L?1.The slope analysis technique is used to investigate the extraction mechanism,and a possible cation-exchange extraction mechanism is proposed in the present extraction system.     

波纹板填料的流体力学性能

应用商用Fluent软件,采用RNG k-?湍流模型,对波纹板填料内三维气相流场进行了数值模拟研究。结果发现,气体从填料底部进入后,大部分气体流入波纹板波谷,并沿波纹板倾角方向流动,此时气体流速较大,压降较小;小部分气体在波纹板波锋区域流动,方向曲折向上,气体流速较小,压降也较大;不同气体动能因子下填料的干板压降模拟值与Billet模型预测值、文献实验数据吻合较好;在理想波纹板填料模型中,气体沿波纹板倾角方向流动碰到塔壁时,转向相邻板片波纹倾角的方向流动,实际应用中容易出现壁流现象。本研究对波纹板填料结构改型及应用具有重要指导意义。     

高压加氢换热器密封技术分析比较

为适应炼油行业的快速发展,先进的炼油工艺在生产中不断得到应用,就国内目前使用的高压换热器的四种密封形式:八角垫密封、Ω环密封、螺纹锁紧环密封、隔膜密封。从结构、制造、检修及经济合理性等方面进行分析比较,提出了大致的适用范围,供设计和使用参考。     

环氧树脂改性聚氨酯弹性体的制备

以二异氰酸酯、聚四氢呋喃醚多元醇为主要原料,通过添加环氧树脂进行接枝改性,合成了环氧树脂改性聚氨酯弹性体。该弹性体力学性能优良、透水系数低。     

稠油化学降黏实验研究

以塔河某稠油为样,在优化条件下进行降黏实验研究。试油40g,降黏剂WWS质量分数0.4%,碳酸钠质量分数0.2%,加水量20mL(矿化度5 000mg/L),实验温度65℃,搅拌下反应80min,稠油的黏度从65℃时的5 620mPa.s降至180mPa.s,降黏率达到96%以上,改善了稠油的流动性。     

用交流阻抗谱法研究碳纳米管改性活性粉末混凝土材料的水化过程

为研究碳纳米管(CNTs)改性活性粉末混凝土(RPC)材料的水化过程,测试了不同CNTs掺量的RPC材料在不同养护龄期下的交流阻抗谱曲线,分析了RPC材料的水化过程、内部孔隙和导电能力。提出了RPC材料阻抗谱等效电路模型,给出了电路模型中具体元件参数的计算方法和计算结果,结果表明模型与实测的结果吻合。     

钨铜合金制备工艺分析

钨铜复合材料因具有优异的电、热性能,被广泛地应用在电子器件及军事用途中。本文重点介绍了熔渗法、活化液相烧结、化学共沉淀法、爆炸粉末压实法等钨铜复合材料制备工艺,并对新型纳米结构、梯度结构、多种形状、高铜型钨铜合金的制备工艺进行了分析。     

型煤移动床富氧连续气化试验运行分析

以福建无烟粉煤和粘结剂成型制得型煤,用富氧空气为气化剂,在3 m型煤移动床富氧连续气化炉上进行了工业化气化试验。结果表明,型煤移动床富氧连续气化,可以实现安全稳定可靠气化运行,制出合格半水煤气,气质能满足合成氨、甲醇生产,可代替间歇式移动床气化。气化火用效率为67.2%,气化效果较好,有显著的节能减排效益,良好的推广应用前景。但有效气体成分偏低,CO2含量比较高。可采用高活性的晋城无烟粉煤生产的型煤气化或通过添加剂提高煤灰熔融温度、气化温度等措施,降低煤气中CO2含量。