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保温油罐抗风圈腐蚀穿孔的修复及改造 总被引:1,自引:0,他引:1
保温油罐抗风圈及罐底板外根部因酸雨聚积形成电化学腐蚀。由于沿海地区空气温度大,盐分重及罐内的温度高,加快了设备的腐蚀。通过对1000立方米燃料油罐的腐蚀原因分析,提出了改造与预防措施。改造后的抗风圈结构能有效地排出进入保温层内的雨水,从而避免了的电化学腐蚀。 相似文献
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Study on diagnostic method for defects in an IGBT module based on DTW deviations of time series
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Insulated gate bipolar transistor(IGBT) is one of the key reliability sensitive components of power electronic equipment. Developing prognostic method for defects in an IGBT module is an important measure to enhance the reliability lever of IGBTs. Therefore,a novel prognostic method based on dynamic time warping(DTW) deviations of time series is presented. This method utilizes variations of DTW of gate voltage series caused by defects to estimate if any defect existes in an IGBT module before breakdown. And application value is verified by test results. 相似文献
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We design a third Hilbert fractal antenna for partial discharge (PD) monitoring in gas insulated substations (GIS) based on fractal principles, and analyze the Hilbert antenna impedance characteristics using an equivalent inductance method of parallel transmission lines. The PD experiment of metal protrusion defect is conducted employing fractal and microstrip antennae. The test results show that the characteristic of the Hilbert fractal antenna has good performance and can detect the PD signal for online monitoring in GIS. A portable online monitoring and locating system for GIS is established using the Hilbert fractal antenna and LabVIEW. The locating accuracy of the PD source in the laboratory meets the requirements of the PD site location. 相似文献
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为建立绵羊肺炎支原体(Mo)感染疾病的现场便捷化诊断方法,本研究选择Mo高度保守区域tuf基因设计合成一对特异性引物和探针,建立了恒温热隔绝式PCR(iiPCR)方法并对其特异性、灵敏性进行评价。结果显示,建立的iiPCR方法仅对Mo的典型菌株和其临床分离菌株的DNA呈阳性结果,具有较强的特异性;对Mo基因组DNA的检出下限为24fg/μL,具有较高的敏感性。利用该方法检测临床样品,结果显示该方法可以从临床采集的羊鼻拭子及支气管拭子中检测出MoDNA,对扩增产物的测序表明检测结果具有较高的准确性。本研究建立的iiPCR方法为Mo的检测及其感染疾病的诊断提供了快速、便捷的技术手段。 相似文献
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电热管集油工艺是严寒地区低产油田实现单管集油、简化工艺、降低投资的一种有效技术措施,大庆外围油田某区块的10口油井采用了电热管单管通球工艺.采用电热保温管道配合单管通球的集油工艺,在不启用井口电加热器的情况下,利用油井进行单管通球试验,探索原油集输系统优化地面工艺、降低投资的新途径.通过对电热管配套单管通球工艺集油流程进行现场跟踪测试,对通球方式和流程、通球效果的实用性进行评价,认为电热管配套单井通球集油工艺在大庆外围油田虽然可行,但收球时间不便掌控,管理困难;通过长期开展电热管单管不通球集油试验,判定电热管单管集油工艺流程不用通球,可正常运行. 相似文献
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本文采用技术经济分析方法,提出蒸汽直埋管保温层经济厚度的计算公式,将有机保温层和无机保温层的厚度优化选择。 相似文献