低温电袋在燃煤锅炉上的应用

本文以广东梅县电厂135MW循环流化床锅炉配套低温电袋复合除尘器为例,阐述低温电袋复合除尘器是节能与减排为一体的新一代高效节能除尘产品,在燃煤电厂上可实现烟气余热回收和烟气粉尘捕集。     

燃煤电厂电袋除尘器节能技术探讨

根据电袋除尘器工艺特点,阐述了其电除尘区、袋区以及引风机的运行特性及节能原理,并重点探讨了控制系统上采用的节能策略,提出对电袋除尘器的电除尘区、袋区、以及引风机采用共同配合,协调控制,以实现节能的最大化。实际应用表明,采用该节能技术,可在保证除尘效率前提下,有效实现电袋除尘器降低能耗目的,提高整体设备性能,最终提高电厂经济效益。     

复合电袋除尘器与实验建设——科研成果向教学的转化成果

传统的电除尘器和布袋除尘器对细颗粒物的除尘效率比较低,难以满足国内外日益加严的工业烟气排放标准。为了紧跟当前除尘技术的发展前沿,开发设计了适用于实验教学的复合电袋除尘器,并新增设了相应的实验项目,使学生不但掌握新技术,更能启发创新思维。该复合电袋除尘设备包括8大系统:粉尘发生器、气流分布板、静电除尘区、布袋除尘区、高低压电源控制系统、通风系统、集尘系统、清灰系统。通过该设备及实验,使学生对大气污染控制产生了浓厚兴趣,对于大气实验课程建设和环境专业复合型拔尖创新人才的培养具有重要意义。     

除尘技术研究进展和袋式除尘ISO标准（英文）

目的:分析当前最新的针对烟气中颗粒物的高效脱除技术,包括静电除尘和袋式除尘的提效方法、原理以及所能达到的效果等;对研究现状进行评述和对未来发展做出展望,并介绍袋式除尘的相关ISO标准。创新点:1.总结了各参数对静电除尘器(包括低低温静电除尘、高温静电除尘和湿式静电除尘等)除尘效率的影响;2.分析比较了不同结构形式的滤袋并总结了适应更高过滤要求的新型过滤材料。方法:1.通过数据分析,比较不同粒径、比电阻和温度对静电除尘器除尘效率的影响,并提出相关改进措施;2.比较不同形式滤袋的收尘特点,结合ISO标准和当前工业需求,对袋式除尘进行展望。结论:1.为保证除尘效率,对于不同特性的粉尘,可采取不同形式的静电除尘器增效技术;2.为满足更高的过滤要求,在袋式除尘器方面,急需开发新型过滤材料和优化清灰技术,以适应更高的温度和满足更高的清灰要求。     

静电增强颗粒层除尘器除尘效率的理论与实验研究

静电增强颗粒层除尘器（EGB)是一种新型高故除尘器。本文采用孤立球模型，推导出孤立颗粒的截留效率计算式和静电效率计算式，进一步提出了EGB除尘总效率计算式。经过颗粒层除尘器(GB)和EGB除尘效率对比实验研究表明：静电能明显提高除尘效率，为设计和研制高故颗粒层除尘器提供了理论依据。     

实际运行中两种除尘装置净化性能比较

作者以热电厂除尘为例,通过研究锅炉烟道气、静电除尘器和麻石水膜除尘器捕集尘的粒径分布,得出两种除尘装置在实际运行中的分级除尘效率,表明两种除尘器脱除效率均随着粒径的增大而提高,对PM10以上的颗粒物脱除效率达90%~94%,而对PM2.5以上的颗粒物脱除效率达80%左右,捕集率较低。这意味着燃煤产生的细颗粒物因除尘装置的去除率低而大部分进入大气中,因此除尘装置除尘性能需进一步改进。通过对两种除尘器净化性能的比较分析,提出加强除尘器运行管理的建议。     

旋风除尘器操作试验台的建模设计

设计制作了"旋风除尘器操作试验台",该装置能调节风量、进灰量等各种试验参数,可观察除尘器内部的气流运动、除尘效果和灰分收集情况,为"大气污染控制工程"和"锅炉原理"等课程的教学提供了实验手段。通过对旋风除尘器的工作原理及结构进行分析,建立以除尘效率、压力损失为目标函数的双目标数学模型。考虑了设计变量和约束条件后,经过优化设计,寻找出旋风除尘器的最优化结构参数,绘制试验平台结构图,并制作了旋风除尘器操作试验台。     

湿式脱硫除尘技术应用

介绍STC-湿式脱硫除尘器原理及在烟气脱硫除尘中的应用,实践表明,在控制燃煤含硫在低于1.2%,STC-湿式脱硫除尘器系统,脱硫率>90%,除尘效率>99%.     

烧结厂静电除尘器性能的改进

本文介绍了静电除尘器在炼钢业中,特别是在铁矿烧结厂烟气除尘方面性能的改进,可大幅度地提高烧结厂电除尘器的除尘效率,并减少能耗。     

S7—400PLC在火电厂电袋除尘控制系统中的应用

针对用户在新建或改造项目中希望采用S7-400PLC的要求,设计了一种基于S7-400PLC的电袋除尘控制系统。阐述了系统的方案设计,给出了系统的主要软、硬件设计构成及原理框图,详细介绍了系统主要工作原理。     

An air cleaner for road tunnels

1. Introduction With the development of transportation, more and more road tunnels, especially the long tunnels, such as Erlangshan Tunnel (4176 m, China), Arlberg Tunnel (13972 m, Austria), Kan-etsu Tunnel (11055 m, South tube, Japan) and Laerdal Tunnel (24510m, Norway) have been built on the highway lines [1]. In a road tunnel, the exhaust gases given off by automobile engines, such as smoke, carbon monoxide (CO), oxynitride (NOx), hydrocarbon, etc., and dust produced by the passing a…     

关于水泥机立窑除尘技术的探讨

水泥机立窑的烟尘排放是水泥生产中对环境的最大污染,其除尘技术是解决问题的关键.介绍了国内目前现有的几种水泥机立窑的除尘技术,对水泥行业当中常用除尘技术进行了归纳比较,以便工程方案设计优化,为今后的除尘技术发展提供帮助.     

Recent advances in dust collection technology and ISO standardization in bag filtration

Dust collection technology is used not only as a countermeasure for air pollution, but also as removing technology for nano-particles, simultaneous removal of gas and dust, and facilitating the use of equipment in extreme conditions such as high and low pressures and temperatures. Particle concentration in the atmosphere, especially PM_2.5, has not decreased despite a reduction in the concentration of dust discharged from stationary sources. This is thought to be because of the formation of secondary particles following the discharge of condensable and/or reactive gaseous materials. Therefore, there needs to be an improvement in dust collection technology. In this paper, recent developments in dust collection technology, especially bag filtration and electrostatic precipitators, are described, and the ISO standards related to bag filtration are summarized. The future prospects for these technologies are outlined. This paper contributes to our understanding of the capture of particulate matter, which will support the improvement of particle removal technologies and the development of future applications.     

水泥窑袋式除尘与静电除尘效果比较

从水泥窑烟气特征着手,比较袋式除尘与静电除尘的效果,分析袋式除尘和静电除尘各自存在的主要问题,对目前水泥窑的除尘方式提出建议。     

Co-benefit of hazardous trace elements capture in dust removal devices of ultra-low emission coal-fired power plants

The co-benefit of hazardous trace elements such as mercury (Hg), arsenic (As), and selenium (Se) capture in dust removal devices of ultra-low emission coal-fired power plants was investigated. Feed fuel and ash samples collected from 15 different coal-fired power units equipped with ultra-low emission systems were characterized to determine the concentrations and distribution characteristics of trace elements. It was found that the low-low temperature electrostatic precipitator (LLT-ESP) and the electrostatic fabric filter (EFF) had greater abatement capacity for Hg than normal cold-side ESP (CS-ESP). Only 0.8%–36.1% of Hg escaped from LLT-ESP and EFF, whereas 42.1%–90.6% of Hg escaped from CS-ESP. With the employment of EFF and ESP (inlet temperature<125 °C), 72.3%–99.1% of As and 70.7%–100% of Se could be captured before the wet flue gas desulfurization (WFGD) system. The significance level of the effects on the abatement capacity for Hg, As, and Se in ESP were analyzed by the Pearson correlation analysis and grey relational analysis. The results indicated that the low inlet temperature of LLT-ESP had significant promotional effect on the simultaneous removal of Hg, As, and Se. The smaller particle size of fly ash can be conducive to the adsorption of hazardous trace elements. The inhibitory effect of sulfur content in coal was significant for the enrichment of Hg and Se in fly ash.     

一种水泥厂除尘技术工作原理与实践：湿法高压静电组合式除尘器

介绍了一种水泥厂除尘的有效技术-湿法高压静电组合式除尘器，包括其构造、原理与应用实践，也包括该方法的优点和要求，以供同类企业的应用参考。对解决水泥厂粉尘污染问题有现实意义。     

Photoshop在针织面料设计中的应用

本文主要讲述如何在计算机上使用Adobe Photoshop图像处理软件进行针织 面料图案设计,其中大花型设计可用电脑大提花机上的专用软件进行转 换,并直接接驳电脑提花机上进行生产．