汽轮机抽凝机组改背压机组运行效果总结

<正>1存在问题河北新化公司股份有限公司有1台C3-3.45/0.49型抽凝式汽轮机组,额定进汽量28 t/h,额定抽汽量20 t/h,最大进汽量32.5 t/h,最大抽汽量25 t/h,最小凝汽量4 t/h;进汽压力3.43 MPa,温度435℃,抽汽压力0.49 MPa。由于造气系统使用蒸汽压力为0.08 MPa,该汽轮机     

次高压背压式汽轮机机组改造

<正>1机组情况石家庄双联化工有限责任公司有1台B12-4.9/0.98型次高压背压式汽轮机机组,进汽压力4.9 MPa,温度435℃,最大进汽量150 t/h,1个双列调节级,3个压力级,套装转子,喷嘴调节。2003年,针对热用户用蒸汽量少、达不到设计要求,对汽轮机机组通流部分作过一次调整,目的作为抽背压机组使用。在实际运行中,锅炉主汽压力在4.1~4.2 MPa,低于原机组设计进汽压力(4.9 MPa),背压在高限约1.1 MPa纯背压方式运     

缅甸30MW配套电厂运行与电气保护的配合

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)     

我公司提高余热发电量的措施

<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,     

6 000kW汽轮机节能技术改造

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     

影响汽轮机汽耗的因素

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。     

锅炉启停过程排汽回收技术的应用

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,     

汽轮机带负荷清洗通流部分积垢的技术措施

正1存在问题安徽晋煤中能化工股份有限公司有2台C12-4.9/0.49型汽轮机机组。自2010年运行以来,由于锅炉的蒸汽质量、排污控制等原因,造成汽轮机通流部分(汽轮机的蒸汽通道)结垢严重。调速汽门全开时,进汽量仅为64 t/h(设计最大进汽量为102 t/h),电负荷为8.2 MW,抽汽压力达1.05 MPa(远超出额定抽汽压力),转子轴向推力     

汽轮机结垢的简易处理方法

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…     

硫磺制酸装置汽轮机使用低过热蒸汽的设想

1设想的由来我公司800 kt／a硫磺制酸装置所使用的2台汽轮机均为B6-35／7型,属中温中压背压式,一台驱动AV80-4型轴流风机,另一台驱动汽轮发电机。由于蒸汽参数沿用传统的比较适合于凝汽式汽轮机的中温中压参数系列,因此两台汽轮机的排汽温度均为280℃,而生产工艺如熔硫、磷酸浓缩等要求低压饱和蒸汽,与汽轮机设计排汽压力相对应的饱和蒸汽温度为162℃,故不得不在     

乙苯,苯乙烯的生产及合成乙苯,苯乙烯催化剂的研究进展

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。     

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.     

生物质气化及生物质与煤共气化技术的研发与应用

总结了生物质原料的特点及生物质单独气化的缺点;介绍了国内外生物质气化技术及生物质与煤共气化技术的研发与应用现状;分析了在此领域国内外的发展趋势与前景;概括了开展生物质与煤共气化技术研发的意义。     

Electronic structures and reactivities of monometallic and bimetallic clusters of Au and Cu

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.     

钾盐资源及钾肥供需情况分析及预测

阐述了国内外钾盐资源及钾肥生产现状,对国内外钾盐的供需形势进行了分析及预测,从资源、原材料、国际市场三方面提出了解决我国钾盐短缺的措施。     

责任和责任心的涵义与结构

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.     

二甲基二烯丙基氯化铵和丙烯酰胺的合成及应用

用复合引发体系(过硫酸盐-偶氮类引发剂)和脂肪胺类氧化还原体系引发,在实验室获得了单体转化率≥98%,特性粘数高于13.6 dL/g的阳离子共聚物PDA,探讨了控制聚合物分子量的影响因素.     

Comparison of the Adhesion and Cohesion of Triblock and Random Copolymers of Styrene and Butadiene

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.     

甘油锌和光稳定剂NBC、BZ的光稳定作用测试与评价

对用甘油锌作光稳定剂的光稳定作用进行了测试，并与光稳定剂NBC，BZ进行了比较。研究了甘油锌，NBC和BZ与双酚A的复配效果。研究结果表明，甘油锌是一种性能优良的光稳定剂。     

Kinetics and Mechanism of Oxidation of Mono- and Polyacetals

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.