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介绍了威顿(达州)化工有限责任公司二期硫磺制酸装置透平风机失速原因。通过系统分析,排除了转化、干吸和尾吸工序的原因,将原因锁定在提供动力的蒸汽管路上。因排气不畅,导致止回阀动作滞后,透平机转速异常。为此,公司更换止回阀轴,透平风机恢复正常运行。 相似文献
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节能降耗是化工企业的生存之本。海洋石油富岛有限公司化肥二部循环水泵系统原始设计时考虑采用“2台透平泵、1台电泵运行+1台电泵备用”的运行模式,实际生产中,由于蒸汽量不足,只能采用“1台透平泵、2台电泵运行+1台透平泵备用”的运行模式,1台在运透平泵或电泵一旦故障跳车会造成循环水系统供水量降低1/3、备用透平泵无法保证及时启动,以及冷却塔电动风机耗电量较大、冷却系统风机启动电流过大易引起用电设备晃电跳闸、风机需全部运行而无备机等问题。为此,富岛公司化肥二部通过可行性分析,决定采用水力透平技术对循环水系统风机实施节能改造。实践表明,改造后冷却塔风机实现了100%无电化运行,粗略估算每年可节约用电成本约779328万元,达到了节能降耗的目的。 相似文献
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奉孝军 《硫磷设计与粉体工程》2014,(1):27-29
硫磺制酸装置主风机若采用透平驱动,在冷态开车时必须从外界引入蒸汽启动主风机,但装置短停后开车时,若操作得当,可利用废热锅炉系统的余热余压自产蒸汽开车。介绍了用废热锅炉余热余压自供蒸汽开车的原理、操作程序和操作要点,并指出如果短停时间过长、设备和管道保温不良、自产的蒸汽压力和温度都较低时,利用废热锅炉自产蒸汽开车存在一定风险。 相似文献
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介绍了德国KK&K风机和美国AC风机在金隆公司烟气制酸系统的应用情况,详细介绍了SO2风机的变频、转子及润滑油等系统。针对运行中出现的问题,技术人员对风机进行了维修和改造,以确保风机安全稳定运行。对国内冶炼烟气制酸SO2风机的选择、设计及设备故障的处理均有一定借鉴作用。 相似文献
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从管道专业的角度,分析了某炼化企业10万t/a硫回收装置透平鼓风机出入口管道及动力管道设计.介绍了硫回收装置透平鼓风机管道设计的思路和方法,针对透平鼓风机管道设计及风机管嘴受力不当等常见问题和设计难点进行了重点分析和阐述,并提出了解决办法. 相似文献
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针对现代大型煤化工项目基本都存在富裕大量中、低品位蒸汽的现象,提出采用中压饱和蒸汽透平技术的建议。介绍了中压饱和蒸汽透平的技术特点、工艺要求;通过工程实例,从生产运行数据和使用的经济性等方面总结了中压饱和蒸汽透平的应用效果。结果表明,采用饱和蒸汽透平可以实现能量的梯级开发和分级利用,有利于富裕蒸汽的有效利用和节能增效。 相似文献
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我厂3号回转窑(Φ4m×60m)生产线在1996年年底由SP窑(产量912t/d)改为NSP窑(产量1320t/d),预分解系统为四级旋风预热器带离线式分解炉 相似文献
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乙烯酮(双乙烯酮)是十分重要的化工中间体,其下游产品较多。江苏某化工厂开发生产乙烯酮(双乙烯酮)下游产品三十多个,年生产规模三万多吨,是国内以乙烯酮(双乙烯酮)为中间体生产精细化学品的综合骨干企业。针对乙烯酮(双乙烯酮)下游产品废水特点,该厂结合企业实际,开展了产品优化,结构调整,清洁生产,资源循环利用,节水降耗等工作,从源头削减了污染物的生产。同时投资二千多万元新建预处理装置三套,6000m3/d废水生化处理装置一套,使全厂乙烯酮(双乙烯酮)下游产品的废水得到了有效的治理。 相似文献
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The miscibility of various amorphous polybutadienes with mixed microstructures of 1,4 addition units (cis, 1,4 and trans 1,4) and 1,2 addition units have been investigated. The studies here involved optical transparency, differential scanning calorimetry, and small angle light scattering. It was found that a 90 percent (cis) 1, 4 addition polybutadiene was immiscible with high (91 percent) 1,2 addition polybutadiene. Reduction of the 1,2 content to 71 percent induced an upper critical solution temperature (UCST) with the cis 1,4 polymer. Polybutadienes with 50 percent and 10 percent 1,2 contents were miscible above the crystalline melting temperature of the cis 1,4 polybutadiene. Immiscibility of the 91 percent 1,2 addition polymer was also found with a 10 percent 1,2 polybutadiene. The latter polymer also exhibits an UCST with the 71 percent 1,2 polymer. The results are used to interpret the characteristics of blends of polybutadienes of varying microstructure. 相似文献
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以F类粉煤灰为例,详细介绍了测定粉煤灰中烧失量的步骤、计算数学模型、影响测量不确定度的因素以及各项测量不确定度分量评定,人员、设备、材料、方法、环境都是影响测量不确定的因素。 相似文献
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The objective of the study was to explore the effect of the degree of deacetylation (DD) of the chitosan used on the degradation rate and rate constant during ultrasonic degradation. Chitin was extracted from red shrimp process waste. Four different DD chitosans were prepared from chitin by alkali deacetylation. Those chitosans were degraded by ultrasonic radiation to different molecular weights. Changes of the molecular weight were determined by light scattering, and data of molecular weight changes were used to calculate the degradation rate and rate constant. The results were as follows: The molecular weight of chitosans decreased with an increasing ultrasonication time. The curves of the molecular weight versus the ultrasonication time were broken at 1‐h treatment. The degradation rate and rate constant of sonolysis decreased with an increasing ultrasonication time. This may be because the chances of being attacked by the cavitation energy increased with an increasing molecular weight species and may be because smaller molecular weight species have shorter relaxation times and, thus, can alleviate the sonication stress easier. However, the degradation rate and rate constant of sonolysis increased with an increasing DD of the chitosan used. This may be because the flexibilitier molecules of higher DD chitosans are more susceptible to the shear force of elongation flow generated by the cavitation field or due to the bond energy difference of acetamido and β‐1,4‐glucoside linkage or hydrogen bonds. Breakage of the β‐1,4‐glucoside linkage will result in lower molecular weight and an increasing reaction rate and rate constant. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 3526–3531, 2003 相似文献