6 000 t/d水泥生产线窑尾钢结构框架安装 防护措施介绍

水泥熟料生产线窑尾钢结构框架是水泥厂建设项目中标志性建筑物,施工周期长、作业高度高、交叉作业多、施工危险性大,容易发生安全事故。本文以某6000t/d新型干法生产线窑尾钢结构框架为例,探讨了窑尾钢结构框架安装防护的安全措施。通过实际施工过程中的检验,安全生产绩效显著。     

水泥厂窑尾钢框架设备吊装及安装施工措施探讨

在所有水泥生产窑尾结构中,窑尾钢框架具备着总高大、层高较大,平面尺寸小,荷载大以及较强稳定性等优势,目前已经受到水泥厂行业的广泛应用。本位围绕水泥厂窑尾框架开展深入研究,在介绍水泥厂窑尾框架结构和腰围系统工程内容的同时,分析窑尾钢框架的吊装、安装施工以及设备的吊装、安装施工,以供国内水泥产业企业加以借鉴,推进我国水泥产业、社会经济健康、可持续发展。     

钢管砼柱窑尾塔架结构设计

1 概述 窑尾塔架是新型干法水泥厂的主要建筑物。随着水泥厂建设规模的大型化,塔架高度越来越高,有的已>100m,结构平面尺寸通常又较小,普通钢筋砼框架已不能满足设计要求,而采用剪力墙、框剪结构又会对大型预热器等设备安装带来困难。 钢结构可使结构框架安装和设备安装同步,降低设备安装难度和费用。故钢结构成为窑尾塔架的首选方案。目前,国内2000t/d以上的水泥厂窑尾塔架均采用了钢结构。 支承窑尾塔架的主要构件是柱。柱截面形式有多种,国内已建塔架常用截面有H型钢、+字钢、空心方钢、纯钢管、钢管砼等。我公司从20世纪80年代设计钢结构塔架以来,上述柱截面形式均采用     

坦桑尼亚DANGOTE 6000t/d项目窑尾框架封顶及回转窑合龙

<正>近日,由中材国际(南京)苏州公司承建的坦桑尼亚DANGOTE 6000t/d熟料水泥生产线项目实现窑尾框架封顶及回转窑合龙。坦桑尼亚项目自开工以来,克服了夏季高温及吊具不足等困难,加强安全生产,注重质量管控,窑尾框架吊装历时142天实现封顶,回转窑吊装历时8天实现合龙,项目部全体员工在施工过程中表现出的精湛的专业技能得到DANGOTE业主方高度评价和一致赞扬。     

大型公共建筑钢结构吊装施工质量控制要点——以南平市体育中心体育场项目为例

大型公共建筑钢结构具有跨度大、高度高、吊装过程自重大等特点,其结构类型以桁架结构、网架结构最为常见。结合某大型公共建筑钢结构和吊装施工,对吊装中的难点和质量控制方法进行分析。分析认为：吊装前应做好钢丝绳的受力验算,吊装点的设计及重心位置的计算;吊装过程中要采取有效措施避免构件变形失稳等,以确保吊装施工质量及施工安全。     

门式轻型钢结构厂房施工技术控制

以中国石油四川石化炼化一体化工程检维修中心钢结构厂房为例,从吊装工程、基础工程、主体工程三个方面人手,分析门式轻型钢结构厂房施工过程中吊装、地脚螺栓埋设、组对安装等环节对整体安装质量的影响因素,及应该采取的有效技术措施。     

浅析影响预热器系统分解率的因素及改进措施

随着水泥熟料的烧成工艺及生产技术水平的不断提高和完善，窑尾预分解系统这一在窑尾系统承担着生料预热、气固分离、生料水分蒸发、部分碳酸盐分解等一系列物理化学过程的关键设备也在不断发展和进步，最大限度换热、最低的流动阻力、尽量高的分离效率是窑尾预分解系统追求的理想目标。     

沙特利雅得水泥公司5000t/d窑尾塔架结构设计简介

简要介绍了沙特利雅得水泥公司5000t/d水泥熟料生产线工程窑尾预热器塔架结构设计中考虑的主要问题,包括结构骨架体系、平面布置、地基基础方案、节点选型、节点计算要点等;并对几种不同的节点形式进行比较,分析各自的特点.该工程的窑尾塔架采用了钢结构的梁板柱,它具有强度高,塑性和韧性好,结构重量轻,施工快捷等优点,钢结构的大量使用为海外总承包工程的工期提供了可靠的保证,综合经济效益显著.     

新技术、新工艺、新装备的发展及应用前景分析

1起重吊装技术在国内外的工程建设中,设备与钢结构安装工程中的起重技术,指在安装施工现场改变被安装设备与构件的平面和空间位置,按设计和安装施工方案的要求,将其准确地安装到预先规定位置所进行的作业,起重技术包括搬运技术和吊装技术。吊装是设备与钢结构工程起重技术中的关键技术。我国设备与钢结构工程起重技术发展的推动力来自主、客     

钢结构吊装施工技术与安全控制

在我国经济及科技水平迅猛发展的背景下,当前建筑施工过程开始广泛应用钢结构,特别是在屋盖体系面积和大跨度建筑工程中应用尤为广泛。针对钢结构进行具体施工时,钢结构吊装是核心环节所在,吊装对建筑程中体系稳定性具有直接关系,因此针对钢结构吊装施工应予以高度重视。在具体应用钢结构吊装施工技术时,需要与施工现场进行充分结合,在此基础上将合理的吊装施工程序制定出来,为钢结构吊装施工质量提供保障作用。与此同时,施工过程还应该重点加强安装管理力度,提供施工技术科学应用和安全管理的双管齐下,确保钢结构吊装施工得以高效、高质、安全完成。     

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。     

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.     

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.     

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.     

Wetting properties of homopolymers and copolymers of pentafluorostyrene and methylacrylate and homopolymer blends

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.