44 应用能源技术 2011年第11期(总第167期) 自然通风湿式冷却塔加装挡风板优化设计 李永华,甄海军,马建坤2 (1.华北电力大学能源动力与机械工程学院,保定0710032.华能上安电厂,石家庄050310) 摘要:以湿冷机组自然通风冷却塔相关理论为基础,借助于CFD模拟软件,建立了火电 机组湿式冷却塔的传热传质模型,主要的换热区域如填料、雨区和喷淋区采用离散相模型。由 于冬季气温较低和塔内的换热不均,在冷却塔的填料下面、进风口处、基环面容易结冰,提出了 在进风口处加装挡风板的方案,数值模拟分析结果显示,该方案改善了塔内温度场,有效的防止 了塔内结冰。 关键词:冷却塔;挡风板;数值模拟;离散相模型 中图分类号:TK264文献标志码:A文章编号:1009-3230(2011)11-0044-05 Optimization Design of Installing Windshield Board On Natural Draft Wet Cooling Tower LI Yong-hua' ,ZHEN Hai-jun' ,MA Jian-kun ( 1.Energy Power and Mechanical Engineering School of North China Electric Power University Baoding 071003 ,China ;2 .Huaneng Shangan Power Plant ,Shijiazhuang 050510 ,China ) Abstract :Based on the relative theorise of the wet cooling tower ,this simulation builds the heat and mass transfer model through CFD .The main heat transfer area ,such as fillers ,rain and spray zone discrete phase model .As the air temperature is low in winter and the heat transfer is uneven in the tower ,the water is easy to freeze below the packing of the cooling tower ,at the air inlet and on the base torus .method is presented that wind shield is installed at the air inlet ,numerical simulation results show which improv...
36 应用能源技术 2013年第12期(总第192期) doi:10.3969/j.isn.1009-3230.2013.012.010 自控闭环控制在化工设备中的应用 皮静轩,刘立新2 (1.大连天晟通用机械有限公司,辽宁大连116025;2.康德玛科技(大连)有限公司,辽宁大连116600) 摘要:合成橡胶业在20世纪初开始生产,从20世纪40年代起得到了迅速的发展。合成 橡胶具有高弹性绝缘性、气密性、耐油、耐高温或低温等性能,因而广泛应用于工农业、国防、交 通及日常生活中。近年来,合成橡胶产业的发展态势让人欣喜。随着生产规模的不断扩大,合 成橡胶产业将在我国产业经济中将占据更加重要的地位。通过几年的发展,国内合成橡胶产业 取得了长足的进步。无论是年产量和消费量,都已经挤入世界前列。合成橡胶设备是化工行业 必不可少的生产装置,由于生产过程连续、产量大,如何减少人力成本,降低单位产量损耗就是 一个重要的课题。 关键词:节能;增效;闭环控制;智能化 中图分类号:TP271.5文献标志码:B文章编号:1009-3230(2013)12-0 Automatic Closed Loop Control Application on Chemical Equipment PI Jing - xuan',LIU Li - xin ( 1.Dalian Tiansheng General Machinery Company Co .Ltd .Dalian 116025 ,China 2 .Countermast Technology ( Dalian)Co.,Ltd .Dalian 116600 ,China ) Abstract :Synthetic rubber menced production in the early 20th century and developed rapidly since 1940 .As synthetic rubber has performance of high elasticity ,insulativity ,gas tightness ,oil resistance and high or low temperature resistance ,it has been widely used in industry ,agriculture national defense ,transportation and daily life ,in recent years ,development trend of synthetic rubber industry is inspired .With continuous development of production scale ,syntheti...
28 当代化工研究 技术应用与研究 201705 聚酯树脂水性化和水性涂料用途 梅英中一 (复旦大学上海200433) 摘要:我国经济的快速发展,对聚酯树脂水性化和水性涂料的使用也越来越多,本文笔者结合国内外对其的制作方法和水性涂料的主要 用途等方面的内容,除此以外,本文还描述了水性涂料在钢铁、塑料和高速公路等领域的应用情况,进一步分析了水性涂料面临的优势、 挑战和机遇。 关键词:水性聚酯树脂;聚酯树脂水性化;水性涂料的用途 中图分类号:T 文献标识码:A Water-borne of Polyester Resin and Application of Water-based Paint Mei Ying Zhongyi Fudan University ,Shanghai ,200433 ) Abstract :With the fast development of China's economy ,the utilization of water-borne of polyester resin and water-based paint has bee more and more frequent .In this paper ;bing with the content of the making methods and main application of water-based paint at home and abroad . it has introduced the application situation of water-based paint in the fields of steel ,plastics and expressway etc .,and then taken further analysis of the advantages ,challenge and chances of water-based paint Key words :waterborne polyester resin ;water-borne of polyester resin ;application of water-based paint 引言 为水性聚酯树脂提供不同比例羧基对为聚酯树脂耐水解稳定性 什么是水性聚酯树脂?顾名思义,就是能溶于水的聚 的影响,实验表明,通过二羟甲基丙酸引入羧基的聚酯树脂具 酯树脂,属于水性涂料的一种。随着环保问题愈发受到国 有较好的耐水解稳定性,随着二羟甲基丙酸对聚酯树脂提供 内外的关注,涂料水性化就成了一个热门话题,而水性聚 羧基数量被偏苯三甲酸酐提供的羧基所取代,聚酯树脂的耐 酯树脂作为水性涂料的一种也正在被深入研究。本文主要 水解稳定性逐步下降,当二羟甲基丙酸为聚酯树...
粉煤灰综合利用 FLY ASH COMPREHENSIVE UTILIZATION 2018N0.2 试验与应用 聚羧酸减水剂配制助磨剂对水泥性能的影响 the Influence of Polycarboxylate Superplasticizer mixed Grinding Aids on Cement Properties 许永东 (安康学院化学化工学院,陕西安康725000) 摘要:试验利用聚羧酸减水剂与三乙醇胺复配作为水泥助磨剂,通过小磨试验研究助磨剂对水泥颗粒的粒度 分布、抗压强度以及水泥的比表面积等因素进行研究,研究表明粒度分布因素与压强有着明显的关联;其中粒度在 3μm~32μm的百分数越多其水泥的强度越大;聚羧酸减水剂助磨剂助磨生产水泥相比较空白水泥其各期龄抗折分 别增加11.7%、8.81%、3.02%,抗压强度其分别增加7%、12.06%、5.4%;其中通过XRD对水泥水化产物CH进 行研究:聚羧酸减水剂助磨剂促进水泥水化反应,提高水泥强度发展. 关键词:粒度分布;聚羧酸减水剂;三乙醇胺;抗压强度 中图分类号:TU528.042*2 文献标识码:A文章编号:1005-8249(2018)02-0043-03 Xu Yongdong Department of Chemistry and Chemical Engineering Ankang University Ankang 725000 China) Abstract:It makes use of Polycarboxylate Superplasticizer and triethanolamine as grinding aids which researches the effect of some factors such as size distribution pressive strength specific surface of cement by ball griding mill test.The result shows that the size distribution and screen residue are obviously related to pressive strength the more percent of particle size range3μm-32μm the more pressive strength. Meanwhile pared with the blank cement the flexural strength increases by11.7%、8.81%、3.02% the pressive strength increases by 7%、12.06%、5.4% th...
201612 绿色化工 当代化工研究5 Intermediate 耿车片区废旧塑料回收加工污染与整治 高松 (宿迁市环保局宿城分局江苏223900 摘要:宿迁耿车片区是国内著名的废旧塑料加工利用产业带,但废旧塑料的不规范加工对周边水、空气、土壤等都带来了环境污染,对 此探讨规范整治和鼓励转型两个治理方案,并从宣传、整治、巩固等阶段来完成。 关键词:耿车镇;塑料回收;整治 中图分类号:T文献标识码:A Pollution and Renovation of Waste and Old Plastics Recycling and Processing in Gengche District Gao Song Sucheng Branch Office ,Suqian Environmental Protection Agency ,Jiangsu ,223900 Abstract :Gengche district of Sugian city is the famous domestic waste and old plastics processing and recycling industrial zone ,however : the non-standard processing of waste and old plastics has brought environmental pollution to surrounding water ;air and soil etc .,for which ,take a discussion of the two renovation plans of standard renovation and encouraging transformation is necessary ,besides ,the two plans will be finished from the aspects of publicity ,renovation and consolidation . Key words :Gengche town ;plastics recycling ;renovation 90年代后期,耿车的废旧塑料回收加工利用产业迅猛 2耿车废旧塑料回收加工污染原因分析 发展,成为了华东地区最大的再生资源加工集散地。“耿车 耿车镇的废旧塑料回收加工产业存在多方面的污染,分 模式”在为当地经济社会发展做出重要贡献的同时,也带来 析其原因如下 了不可忽视的环境污染。 (1)产业自身属性。塑料品加工本身就不可避免地会产 1.耿车废旧塑料回收加工的污染与危害 生污水废气。所回收的塑料废品,相当一部分来自于农药、 (1)污染地下水。宿迁是平原地带,耿车废旧塑料清洗 化妆品、医药品等所用,在加工...
施工技术 2011年8月下 CONSTRUCTION TECHNOLOGY 第40卷第347期 网状FRP增强砖砌体轴心受力性能试验研究 沙吾列提拜开依,沈祥 (新疆大学建筑工程学院,新骚乌鲁木齐830043) 摘要]提出一种新型砌体结构形式的概念和方法,通过3个试件的初步试验验证了这种新型砌体结构形式的有 效性,网状FRP增强砖砌体是对FRP材料和翻体结构合理、有效地组合。进一步分析了网状FRP增强砖砌体的工 作机理、破坏形态和作用效果。研究表明:采用建议的新型砌体结构形式,改变了试件的最终破坏模式,显著提高 了承载力。 【关键词】试验GFRP;CFRP;砖砌体 【中图分类号]TU362 文献标识码]A 文章编号1002-8498(2011)16-0078-03 Experiment Research on FRP Mesh Reinforced Brick Masonry Under Axial Compressive Loading Sawulet .Bekey,Shen Xiang ( Schoolof Civil Engineering ,Xinjiang University ,Urumqi ,Xinjiang 830043 ,China ) Abstract :A new type of masonry structure is presented in concept and methods .The effectiveness of this new type of masonry structure is proved through the preliminary experiments of three specimens .FRP mesh reinforced brick masonry is reasonable and effective bination of FRP materials and masonry structure .Furthermore the working mechanism ,failure mode and effect of this kind of structure are analyzed .The result shows that the new type of masonry structure changes the specimen's ultimate failure mode ,and increases ultimate loading capacity significantly . Key words :test;glass fiber reinforced polymer ;carbon fiber reinforced polymer ;br...
工技术 2014年5月上 40 CONSTRUCTION TECHNOLOGY 第43卷第9期 doi:10.7672/sgjs2014090040 网梁楼盖在某工程中的应用 姒洋,张焱奎,陈满新,朱宏杰,王庆忠2 (1.中国建筑第五工程局有限公司,湖南长沙410004:2.济南西城投资开发集团有限公司,山东济南250000) 摘要]网梁楼盖为箱形截面的密肋楼盖,由预制叠合构件“叠合箱”与后浇肋梁连接形成,在山东地区,网梁楼盖 为越来越多地用于解决大跨度、大空间的建筑新技术,具有节约大量的钢材和混凝土、减少模板、方便施工、降低造 价、耐火性能好、抗震性能好、整体性好等特点。结合某实际工程,介绍了网梁楼盖构造、技术特点及施工工艺。 [关键词]混凝土;楼盖;网梁楼盖:构造;施工技术 中图分类号]TU755 [文献标识码]A [文章编号]1002-8498(2014)09-0040-04 Net-beam Floor and Its Application in Some Project Si Yang' ,Zhang Yankui' ,Chen Manxin' ,Zhu Hongjie ,Wang Qingzhong ( 1.China Construction Fifth Engineering Dirision Co ..Changsha ,Hu'nan 410004 ,China ; 2 .Ji' nan West City Inrestment and Derelopment Co .Ltd .Ji' nan ,Shandong 250000 ,China ) Abstract :The net-beam floor is ribbed floor with box section ,which is connected with prefabricate superimposed box and later poured ribbed beams .In Shandong province ,the net-beam floor is increasingly used in large-span and large space building as a new technology which can save large quantity of steel ,concrete ,formwork and the project cost .And the net-beam floor has good property of fire resistance ,seismic and integrity .Based on practical projects ,the structure ,technical features an...
[关键词]钢结构;网架;稳定性;杆件;置换 [中图分类号]TU758.15 [文献标识码]A [文章编号〕1002-8498(2015)16-0079-02 ResearchandApplication ofReplacementEquipmentfor GridTensionMembers Zeng Fanyong'²,Zhao Banghui²,Ye Jun? (1.School of CivilEngineering,Jiangsu Jianzhu Instiute,Xuzhou,Jiangsu 221116,China;2.School of Mechanics&CivilEngineering,ChinaUnivesityofMiningandTechnology,Xuzhou,Jiangsu221008,China; 3.ShenzhenJinxin Steel Structure Building Installation EngineeringCo.,Ld.,Shenzhen,Guangdong 518117,China) connecting. Grid will be damaged in the course of using. Combing with specific engineering,a kind of replacement equipment for truss tension rod was researched and development for the damage or needing temporary sampling rods.The equipment has a certain application value through experiments and field application. Key words;steel structures; grid; stability;rods;replacement 0引言 置换设备拉杆、螺杆均采用优质碳素结构钢45 在我国不论在规模上还是数量上,网架都居于号圆钢制作;锚头均采用Q345B钢板;置换设备焊 世界的领先地位。