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本文介绍了塑料在汽车,情报通信,电子,家电,办公机器,电线电缆,机械部件,船舶,航空宇航,铁道车辆,原子能设备,包装容器,医疗等领域的应用实例。 相似文献
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陶瓷美术作品的艺术魅力,在于巧用艺术手法,艺术手法大致可分引用,映衬,象征,双关,拟人,夸张,借代,对比,比喻,渲染等类,巧用这些手法,能大大地增强作品的艺术感染力。 相似文献
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2004年12月28日,《腐植酸》杂志迁址,改版,增期后第一届编辑委员会在北京圆山大酒店召开。参加编委会的委员来自中国科学院,中国农科院,中国农业大学,中国矿业大学,北京理工大学,北京化工大学,黑龙江省林科院,河南省科学院,山东科技大学, 相似文献
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本介绍了美国,西欧,非洲和中东地区以及日本地区的氧化镁的供需情况,包括生产公司,生产能力,历年产量,消费量,价格及进出口贸易。详细介绍了氧化镁在耐火材料,在农业,电气,化学,钢铁工业,水处理,建筑行业,医药和食品等方面消费量以及到2004年前景预测。 相似文献
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我国精细化工中间体与催化技术的状况 总被引:1,自引:0,他引:1
我国精细化学品的分类及催化剂的应用 根据国情和国民经济发展的需要,中国将精细化学品分为农药,染料,涂料,颜料,试剂和高纯物,信息用化学品,食品和饲料添加剂,粘合剂,催化剂和各种助剂,化学药品和日用化学品。高分子聚合物中的功能高分子等11个大类。其中催化剂包括炼油,石油化工,有机化工,精细化工,合成氨,硫酸,环保用催化剂和其它催化剂;助剂包括印染助剂,塑料助剂,橡胶助剂,水处理化学品,纤维抽丝用油剂,有机抽提剂,高分子聚合物添加剂,表面活性剂,皮革化学品,农药用助剂,油田化学品,混凝土外加剂,机械和冶金用助剂,油田添加剂,炭黑,吸附剂,电子化学品,造纸化学品及玻璃防雾剂和乳胶凝固剂等其它助剂。将生产精细化学品的工业称为精细化工。 相似文献
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我国染颜料中间体投资热点分析 总被引:5,自引:0,他引:5
该文介绍了邻甲基水杨酸,K酸,对氯苯甲醛,2,6-二氯苯甲醛,2,6酸,3,3‘-二氯联苯胺,间苯二酚,间氨基酚,苯基苯酚,吲哚衍生物等染料中间体国内生产现状、应用和合成技术及发展趋势。 相似文献
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企业清洁生产审计,就是对企业生产全过程进行具体的监测,分析和评估,找出物料和能源流失的部位,数量和原因,进而对症下药,采取措施进行改进,从而实行清洁生产。企业清洁生产审计可分为筹划和组织,预评估,评估,备选方案的制定和筛选,可行性分析,方案实施,持续清洁生产七个步骤,以硫酸企业为例,进行了说明。 相似文献
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介绍使用三菱FX1N-40MRPLC实现机械动力头自动控制的程序设计,并以此归纳总结三菱FX系列PLC用于顺序控制系统时,采用状态编程法的优点及要点。 相似文献
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In this study, new thermosetting acrylic polymer light conduits (PLCs) with the composition of AxByCz were prepared and characterized. The A and B components were methyl methacrylate and butyl acrylate, respectively. Tri-funcational
acrylic monomers were used for the C component. The thermal properties and optical properties of the prepared PLCs are presented
and compared with a commercially available PLC, S1. The prepared PLCs also have high numerical apertures and large diameters for illumination applications. The peak intensity
and position can be tuned from their molecular structures. The peak position in the optical loss spectrum is in a satisfactory
agreement with the theoretical calculation from the FTIR spectra, which results from the high harmonics of the C-H stretching
vibration band. The peak intensity of the optical loss spectrum is proportional to the C-H bond density of the polymer core.
The prepared PLCs have better thermal stability than S1. 相似文献
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提出基于三菱PLC的隧道通风自动化控制系统。对通风系统的关键部分——隧道烟雾浓度自动化控制系统,采用了以三菱PLC+CO/VI检测器+FX2N-4AD模块为主要元器件的控制方法,有针对性地对相关线路、设备进行技改,以提升通风系统的自动化水平。 相似文献
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分析了解化化工分公司热动力厂电除尘输灰控制系统存在的问题,并重点介绍了FX2-48MR可编程控制器在输灰控制系统中的组态方法和应用情况。利用闲置设备(FX2-48MR)代替QS系列气力输送系统,对电除尘输灰自动控制系统进行改造,简化了控制程序,提高了控制可靠性,降低了维修成本。 相似文献
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设计了基于三菱FX2N-32MT和FX2N-1PG-E PLC的圆柱形锂离子电池激光自动焊接系统.该系统能提高圆柱形锂离子电池的生产效率和成品率. 相似文献
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介绍了基于离子交换除盐工艺的大港石化厂除盐水监控系统改造工程。文章首先介绍了系统基本工艺,在此基础上介绍控制系统基本组成、各个控制系统的主要功能配置,介绍了工程中仪表选型和安装问题。 相似文献
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文章介绍了基于超滤和反渗透工艺的大港石化厂中水回用控制系统。控制系统采用了工控机+PLC+现场控制站结构。文章首先介绍了系统基本工艺,在此基础上介绍控制系统基本组成,介绍了预过滤、超滤、加药、反洗等各个子系统的主要功能,最后介绍了保护系统。 相似文献
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介绍了利用微型计算机和三菱FX2N系列可编程控制实现平板玻璃切割机的自动控制,包括系统的组成,控制方案的实现和系统程序框图等。 相似文献
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In this study a series of thermosetting acrylic polymer light conduits (PLCs) with the composition of AxByCz were synthesized to investigate the structure–property relationships. The A and B components were selected from methyl methacrylate (MMA), butyl acrylate (BA), or 2,2,3,3‐tetrafluoropropyl methacrylate (TFPMA). Various bifunctional acrylics were used for the C component. High numerical aperture values were found in the prepared large‐diameter PLCs. The peak maxima of the optical loss spectra vary from 735 nm to 745 nm, which satisfactorily agree with the theoretical calculation from the FTIR spectra. They are due to the fifth harmonic of the C—H stretching vibration band. The peak maximum and intensity can be adjusted by varying molecular composition. The peak intensity of the optical loss spectrum is proportional to the C—H bond density of the polymer core. The replacement of the MMA moiety by the TFPMA moiety in the three‐component thermosetting PLCs reduces the peak intensity. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 76: 2098–2104, 2000 相似文献
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Shupanxiang Chen Guangying Chen Xiaolan Zhao Xiao Luo Hongxia Gao Wensheng Li Zhiwu Liang 《中国化学工程学报》2021,40(12):179-186
The operation of dehydration is very important in the process of gas transportation. This study aims to evaluate the application feasibility of CO2 dehydration using triethylene glycol, which is also called TEG for short. Aspen Plus software was used to simulate the dehydration process system of CO2 gas transportation using TEG dehydration. Parameter analysis and process improvement were carried out for the simulation of dehydration process. At first, a sensitivity analysis was conducted to analyze and optimize operating conditions of conventional CO2-TEG dehydration process system. Subsequently, a recycle unit was introduced into the conventional CO2-TEG dehydration process system, it can be found that the improved process system with the recycle unit has a higher CO2 recovery rate which was about 9.8% than the conventional one. Moreover, the improved process system showed excellent operation stability through the comparison of simulation results of several processes with various water contents in their feed gases. Although the energy consumption is increased by about 2%, the improved process was economically and technically feasible for the long-term availability of CO2 pipeline transportation. The simulated results showed that the improved CO2-TEG process system has promising application prospects in CO2 dehydration of CO2 gas transportation with high stability. 相似文献