在线监测透平驱动压缩机组热力性能系统的开发与应用

针对汽轮机及压缩机的效率监测、汽轮机的结垢情况及结垢趋势判断、如何做到预防性维护及检修等问题,通过建立汽轮机及其压缩机组的热力性能参数监测及故障诊断系统,建立机组性能的预测模型,开展机组热力参数监测、性能预测,研发1套能够在线监测压缩机组热力性能的系统,以优化压缩机及汽轮机的操作。     

石化企业往复式压缩机的故障分析及维护

本研究首先从往复式压缩机热力性能和机械功能两个方面分析了石化企业往复式压缩机的故障,然后从直观检测、热力性能参数监测、振动噪声监测、油液监测、人工智能诊断五个方面对石化企业往复式压缩机的故障维护进行了探讨。     

往复式压缩机气阀故障诊断与研究

在介绍往复式压缩机的定义、工作原理的基础上,首先对往复式压缩机的应用现状进行了分析,其次对往复式压缩机状态监测与故障诊断策略进行了探讨,并在最后对往复式压缩机常见的故障类型以及相应的判断分析方法进行了阐述,希望能够有效提升故障排除水平,更好的完成故障清除任务,提升往复式压缩机的应用效果。     

基于BH5000R的往复式压缩机故障诊断分析

本文使用BH5000R往复压缩机在线监测诊断系统对合成气净化装置燃料气压缩机运行故障进行分析,通过比较历史运行状态、活塞杆位移量、缸体振动与曲轴箱振动等图谱特征,分析诊断出了燃料气压缩机跳车原因进而指导现场检修。现场拆检情况进一步验证了BH5000R往复压缩机在线监测诊断系统的可靠性。     

电涡流传感器在离心式压缩机上的应用

介绍了电涡流传感器的工作原理及其对离心式压缩机轴位移、轴振动、轴转速的监测。指出电涡流传感器用于对离心式压缩机的长期实时监控,可以分析离心式压缩机的工作状况和故障原因,实现有效地对离心式压缩机进行保护及预测性维修。     

裂解气压缩机组的振动监测与振动异常分析

针对裂解气压缩机由于二段入口带液导致出现振动异常,利用S8000大型机组在线状态监测系统,对其进行振动监测与故障诊断,并对压缩机状态进行评估,提出针对性措施。     

大型往复式压缩机状态监测与故障诊断技术的应用

随着石油天然气开采规模的不断提升,石油生产过程中对压缩机可靠性、安全性、节能性的要求越来越高,要求在压缩机应用的过程中,可以对压缩机的状态进行实时监测,并及时发现和诊断压缩机存在的故障,在此背景下,笔者结合工作经验,针对大庆炼化公司使用的大型往复式压缩机的状态监测和故障诊断技术的应用展开研究,为提升大型往复式压缩机的使用效果提供参考。     

裂解气压缩机的维护与长周期运行管理探究

裂解气压缩机油路系统故障和透平结垢程度问题是影响裂解气压缩机长周期运行的主要因素。通过大量运行实践研究,证明对油路系统改造,进行状态监测与故障诊断可有效避免系统故障。同时,对透平进行在线清洗既可提高透平的有效功率,又保障了压缩机组长周期运行。     

电涡流传感器在压缩机振动监测方面的应用

作为硝酸生产工艺中的关键设备,轴流压缩机的稳定运行是整个工艺系统长周期、稳定生产的保证和前提。通过电涡流传感器对压缩机的振动进行监测,可以实时掌握压缩机的运行状况,及时发现、处理压缩机出现的故障。     

往复压缩机故障诊断技术研究

本文以企业实践者角度,从往复压缩机在企业的重要性,常用压缩机故障诊断监测信号种类分类及监测方法,提升经验到理论技术及智能化的常用方法及路径,排气不足、排气温度异常、响声异常、压力异常、过热情况等的诊断实例,及后续展望等方面完整地对往复压缩机故障诊断技术进行了有益的探索研究。     

Influence of the surface modification of a filler on the properties of high‐impact polystyrene composites

A novel technique of surface modification was used to treat nanomodified aluminum trihydrate (nano‐CG‐ATH). The results of the surface modification were characterized with transmission electron microscopy and Fourier transform infrared spectra. The effects of the surface modification on the properties of high‐impact polystyrene (HIPS) composites were studied with limiting oxygen index (LOI) and mechanical tests. The dispersion of nano‐CG‐ATH in the HIPS matrix and the interfacial adhesion between them were observed with transmission electron microscopy and scanning electron microscopy. The experimental results demonstrate that the surface of nano‐CG‐ATH was successfully grafted by an organic substance, and the dispersion of treated nano‐CG‐ATH in ethanol was better than that of untreated nano‐CG‐ATH. At high loadings, the mechanical properties and LOI values of the HIPS composites with treated nano‐CG‐ATH were higher than those of the HIPS composites with untreated nano‐CG‐ATH. The dispersion of treated nano‐CG‐ATH in the HIPS matrix was better than that of untreated nano‐CG‐ATH in the HIPS matrix. Also, the interfacial adhesion between the HIPS matrix and treated nano‐CG‐ATH was better than that between the HIPS matrix and untreated nano‐CG‐ATH. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2009     

Effect of mixed support of carbon black and nanographite on the activity of Pt catalyst for ethanol oxidation

The effect of the mixed support of carbon black and nanographite (CG) on the electrocatalytic activity and stability of the CG supported Pt (Pt/CG) catalyst for ethanol oxidation was investigated. It was found that the electrocatalytic activity and stability of the Pt/CG catalyst for ethanol oxidation depend on the weight ratio of carbon black and nanographite because the carbon black has a large surface area and nanographite has high conductivity. The Pt/CG catalyst with a weight ratio of 10:1 produces the best electrocatalytic activity and stability of the Pt/CG catalyst for ethanol oxidation.     

故障诊断技术在空气压缩机故障诊断中的应用

尼龙厂新醇酮装置空气压缩机为离心压缩机,在投入运行后,发现低压缸转子振值过高,为了找出转子振值过高的原因,并有针对性的解决问题,利用中国石油在线监测系统,对该空气压缩机进行状态监测,做出相应的频谱图,与各种故障特征进行对比。应用设备故障诊断技术对监测所得数据和图表进行分析,认为转子振值过高的原因是由于转子质量不平衡造成的,可以利用现场动平衡技术,即可将振值由50.8μm/60.5μm降到18.2μm/20.0μm,解决了空气压缩机转子振动问题。     

钢渣与自燃煤矸石复掺对水泥性能的影响

运用正交试验研究了钢渣与自燃煤矸石的复掺比例、比表面积及石膏的种类等对复合水泥性能的影响。结果表明,钢渣与自燃煤矸石的复配比例是影响其强度的关键因素,其次分别为钢渣、自燃煤矸石的比表面积,而石膏的种类对其影响最小。试验优化的配比为：钢渣和自燃煤矸石的配合比为25%∶5%,钢渣比表面积为448m2/kg,自燃煤矸石比表面积为640m2/kg,石膏为3份天然二水石膏混合2份脱硫石膏,以及配比为钢渣和自燃煤矸石的配合比为25%∶5%,钢渣比表面积为516m2/kg,自燃煤矸石比表面积为470m2/kg,石膏种类为3份天然二水石膏混合2份改性磷石膏。     

煤矸石灰添加对准东煤灰熔融特性影响

选取两种准东煤（ZDA和ZDB）为研究对象，利用灰熔融温度测定仪、X射线荧光光谱和X射线衍射仪考察了单一准东煤灰及其与煤矸石（CG）灰掺混后酸碱比、化学组成和矿物质演变对灰熔融特征温度的影响规律。结果表明高温下ZDA中主要矿物组分为霓辉石和赤铁矿等助熔矿物，而ZDB中以难熔矿物硫铝酸钙与镁硅钙石为主，导致ZDA灰熔融温度明显低于ZDB。随着CG灰质量分数增加，ZDA/CG与ZDB/CG熔融特征温度呈现先下降后上升趋势，分别在CG灰添加比40%和60%时出现最小值；当ZDA/CG与ZDB/CG酸碱比接近时，CaO与Fe₂O₃含量是影响变形温度与流动温度的主要原因。对于上述两种高碱性煤灰，含钙矿物对于灰熔融特性影响较大，而含钠矿物的影响相对较小。本文旨在为改善准东煤灰沉积倾向提供基础数据。     

Effect of coal gangue/carbon black/multiwall carbon nanotubes hybrid fillers on the properties of natural rubber composites

The objective of this study was to investigate three kinds of filler with completely different morphology on mechanical properties of natural rubber (NR). Coal gangue (CG) are derived from natural deposits are composed principally by illite and quartz. CG, carbon black (CB), and multiwalled carbon nanotube (CNT) were used as hybrid fillers in NR. CNTs were dispersed into NR latex by ultrasonic irradiation and then the mixed latex were coagulated to obtain the CNTs/NR masterbatch, then mechanical mixing method was employed to prepare the CG/CB/CNTs/NR composites. The addition of CG, CB, and CNTs to NR was varied with the total filler loading fixed at 35 phr. The mechanical properties of NR composites were studied in terms of tensile and dynamic mechanical analysis (DMA). The results showed that the tensile strength and modulus 300% (M300) of all hybrid samples were higher than the composites only loaded CG; and the highest tensile strength of NR loaded with hybrid fillers achieved at sample of loading amount of CG 17.5, CB 15.5, and CNTs 2 phr, whose M300 and elongation at break was obviously higher than that of only CB loaded NR composites; The inclusion CG improves the tensile strength of NR without the sacrifice of its extensibility, while CB and CNTs brings together the enhancement in the ultimate strength and the reduction in the extensibility. DMA results revealed that the existence of CG can improve the dispersion of CB and CNTs in NR matrix. POLYM. COMPOS., 37:3083–3092, 2016. © 2015 Society of Plastics Engineers     

彩南DPC-2804天然气压缩机故障树分析

在分析、归纳彩南站DPC-2804天然气压缩机常见故障的基础上,根据天然气压缩机工作原理和失效机理,建立了彩南天然气压缩机故障树,并运用故障树分析方法对彩南DPC-2804天然气压缩机的可靠性进行了定性分析。本文分类总结了彩南DPC-2804天然气压缩机的故障形式;详细论述了建立天然气压缩机故障树的过程;建立并绘制了DPC-2804天然气压缩机的故障树;根据天然气压缩机的故障树图,运用下行法求出其故障树的最小割集,进行定性分析;通过对天然气压缩机的定性分析,找出引起压缩机失效的主要影响因素及改善措施。     

Sustainable biodegradable coffee grounds filler and its effect on the hydrophobicity,mechanical and thermal properties of biodegradable PBAT composites

Poly(butylene adipate‐co‐terephthalate) (PBAT) and coffee grounds (CG) wastes are biodegradable materials. The high cost of PBAT restricts its marketability; the lignocellulosic CG were used as a reinforcing agent for PBAT. Thus, the present work focuses mainly on the preparation and characterization of bio‐based PBAT composites filled with CG bio‐additives with affordable cost, and with potential use in a variety of eco‐friendly fields such as packaging, biomedical devices, and composting. The PBAT polymer was melt blended with various contents of CG powder using twin screw extrusion. The compatibility and dispersion state of investigated biocomposites in presence or absence of PEG as plasticizer were investigated by using scanning electron microscopy (SEM) and X‐ray diffraction (XRD). The effect of the addition of PEG on PBAT/CG was characterized by differential scanning calorimetry (DSC), tensile properties, contact angle measurements, and thermogravimetric analysis. The chemical interaction between hydroxyl groups of CG particles and PEG plasticizer was achieved by these techniques. A pyrolysis kinetic model was proposed to identify the kinetic parameters of the thermal degradation of PBAT and CG powder. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134, 44498.     

往复压缩机监测与诊断技术研究现状与展望

分析了往复压缩机的常见故障模式与机理,综述了往复压缩机故障诊断方法和监测装置的研究现状,指出了往复压缩机在线监测与诊断技术的发展方向。     

PK320压缩机氮气替代丙烯试车功率和温升核算

针对SPHERIZONE工艺聚丙烯装置往复式高压循环压缩机PK320初始安装后以及大修后试车替代介质的选用问题,根据绝热状态下气体压缩所需理论功率和气体压缩后理论温升公式,分别计算出了压缩机在丙烯和氮气工况下试车的功率和温升数值,对比压缩机实际设计参数,确定了采用0.6 MPa低压氮气替代实际工作介质丙烯试车的可行性和安全性,为压缩机大修后及时、安全试车提供了理论依据。