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正1项目简介中材国际缅甸水泥项目配套工程建设一套300MW燃煤电站机组,为水泥生产线供电。工程设计基本条件是并网运行,根据当地煤质情况,主机设备采用国产设备,配有高温高压循环流化床锅炉1台,额定蒸发量130 t/h,额定蒸汽压力9.80 MPa,过热蒸汽出口温度540℃;凝汽式汽轮机额定功率30MW,额定转速3 000 r/min,额定进汽压力(绝对) 相似文献
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<正>1存在的问题我公司两条熟料生产线(~#1线设计熟料产能700 t/d,~#2线设计熟料产能2 500 t/d)配套7.5 MW纯低温余热发电项目,采用单压系统,汽机为低参数纯凝汽轮机,额定功率7 500 kW,额定进汽压力1.0MPa,额定进汽温度340℃,排汽压力0.008MPa, 相似文献
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引 言我公司动力车间B6 3 5 /1 0型背压式汽轮机设计额定功率 60 0 0kW、进汽压力 3 5MPa、排汽压力 1 0MPa、额定进汽量 94t/h。由于公司 1 0MPa的中压蒸汽和 0 4~ 0 6MPa低压蒸汽消耗大幅下降 ,造成汽轮机实际工作负荷远远偏离设计值 ,常年在低负荷下运行 ,夏季 ( 4 相似文献
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我厂28000m^3/h空分装置驱动空压机及空气增压机的汽轮机型号为NKS50/71/0,单缸冷凝式,额定功率33946kW,转速5665r/min,进汽压力3.5MPa,温度400℃,流量153.54t/h;正常功率30610kW,转速5547r/min,进汽流量135.86t/h。笔者凭借实际生产操作中积累的经验和理论分析以及记录报表数据,通过比较、分析,总结出了以下8项影响汽轮机汽耗的因素。 相似文献
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山东恒通化工股份有限公司热电厂现有5台YG240-9.8/M1型高温高压循环流化床锅炉。额定产汽量240t/h,主蒸汽温度540℃,主蒸汽压力9.8MPa,主蒸汽系统采用母管制。所产蒸汽供3台C50-8.83/1.57型抽凝汽轮发电机组使用。5台锅炉的蒸汽经5根Φ277mm×20mm管并入蒸汽母管,再经6根Φ277mm×20mm管供给汽轮机,3台汽轮机具有一级可调抽汽, 相似文献
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汽轮机是以蒸汽为工作介质的热能动力机械设备。在长期运行过程中 ,由于蒸汽质量不好或锅炉负荷急剧变化 ,都会造成汽轮机通汽部分结盐积垢 ,喷嘴和叶片积垢尤为严重。我公司 1 998年上马的中氮改扩建项目中 ,为空分装置空气压缩机配套的汽轮机是从西门子公司引进的背压式汽轮机。该机运转一年后 ,发现在相同的新蒸汽条件下 ,转数由试车初期的额定90 0 0 r/ min下降到 83 0 0 r/ min,空压机排气量由650 0 0 m3 / h下降到 53 0 0 0 m3 / h,且叶轮前段排汽压力由 2 .0 MPa上升到 2 .9MPa,工作效率大幅度下降 ,无法满足生产需要。经分析 ,发… 相似文献
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苯乙烯是重要的石油化工原料。本文介绍了国内外苯乙烯生产的发展概况,合成乙苯,苯乙烯所用的催化剂种类,并就苯乙烯生产及催化剂的发展趋势提出了自己的观点。 相似文献
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Synthesis and characterization of homopolymers and copolymers of various acrylates and acrylonitrile
Various homopolymers and copolymers of methyl acrylate, ethyl acrylate, butyl acrylate, and acrylonitrile in different feed ratios were synthesized. These were characterized by IR, 13C-NMR, DSC, DTA, and TGA. Spectroscopic characterization helped in differentiating copolymers of different mol ratios. Thermal analysis revealed different degradation patterns for homopolymers and copolymers. The temperature and energy changes associated with various phase transitions were dependent on the chemical composition of homo- and copolymers, as expected. © 1993 John Wiley & Sons, Inc. 相似文献
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The variation of the Au 4f binding energy of Au clusters with the cluster size has been established by measuring the binding energies of clusters whose size distributions were independently determined by HREM and STM. The binding energy increases significantly when the cluster size is less than 2 nm. Au-Cu bimetallic clusters of the composition Cu3Au have been deposited for the first time on carbon substrates. The shifts in the core level binding energies of the bimetallic clusters show the effect of alloying in the case of large clusters, but show effects of both alloying and cluster size in the case of the small clusters. The interaction of CO with Cu3Au clusters is stronger than with a bulk Cu metal. The interaction of CO with small Cu clusters also seems to be stronger than with bulk Cu or with large Cu clusters. 相似文献
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《国际聚合物材料杂志》2012,61(1-4):113-122
Abstract Kinetics and mechanisms of oxidation of 6 acetals by molecular oxygen and ozone in liquid phase have been studied. Reaction with molecular oxygen (70°C, 15–16 hr) leads to the formation monoethers of the corresponding glycols with 68–90% selectivity. Salts of metals and complexes with crown-ethers have increased the reaction rate significally. Ozone have reacted with acetals with formation similar products. The mechanisms of intermediate stages have been proposed. 相似文献
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G. R. Hamed 《The Journal of Adhesion》1983,16(1):31-39
A substantially greater detachment energy is required to strip a polyethylene tereph-thalate (Mylar) film from a styrene-butadiene-styrene (SBS) triblock copolymer compared to that for peeling from a random styrene-butadiene (SBR) copolymer. This is true even though the intrinsic interaction between the Mylar and each elastomer is expected to be similar because of their virtually identical chemical composition. It is proposed that this difference in peel strength (between the SBS and SBR) is a consequence of the much higher dissipative capacity of the former elastomer. Another manifestation of this is the higher cohesive tear strength of the SBS compared to the SBR. Extents of energy dissipation within each elastomer during detachment of the Mylar adherend are consistent with the hypothesis that the average maximum stress experience before detachment is some similar fraction of each elastomer's tensile strength. 相似文献
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责任是人应主动承担的角色义务和对其因过失所造成后果应承担的责罚.有两层涵义:一是义务;二是后果.责任心是个体自觉做好分内事务和履行道德义务的心理倾向,是个性心理品质成分中自我特征维度上的重要内容.责任心具有两个方面的涵义:一是角色分内职责;二是角色道德义务.责任心是一种通过责任认知、责任个性和责任适应的动态形式表现出来的静态品质,责任心是责任心过程结构与责任心关系结构相互制约、相互影响的统一体. 相似文献
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Polypentafluorostyrene (PPFS), polymethylacrylate (PMA), and poly(pentafluorostyrene-co-methylacrylate), poly(PFS-co-MA) were prepared and the wetting characteristics of polymer blends of PPFS and PMA were compared with that of poly(PFS-co-MA) via contact angle measurements. The critical surface tension of polypentafluorostyrene was found to be 22.6 dyne/cm, which is comparable to the value reported for polytrifluoroethylene (22 dyne/cm). The critical surface tension of poly(PFS-co-MA) is not linearly related to its composition. The polymer blends of PPFS and PMA exhibit significant surface enrichment of the fluoropolymer. The harmonic-mean method1 was employed to determine surface tensions of these polymers and many known polymers. It is found that the method produces useful surface tension data provided the contact angle values are derived from testing liquids of dissimilar polarity. 相似文献