电袋复合除尘器在燃煤锅炉大型机组上的应用

近年来,电袋复合除尘技术在燃煤锅炉烟气除尘行业的应用取得了快速发展,并实现了600MW、1000MW大型机组的突破。电袋复合除尘器已成为继电除尘器、袋式除尘器之后的新一代高效除尘设备。应用实践表明,电袋复合除尘器对煤种变化的适应性强,可长期保持低排放,并具有运行阻力低、占地面积小等优点。介绍了世界上首台1000MW机组电袋复合除尘器的开发和应用情况。     

华电新乡宝山电厂660MW机组除尘器提效改造

华电新乡宝山电厂660MW机组配套电-袋复合除尘器是国内成功投运的大型电-袋复合除尘器。该机组原配套2台双室四电场电除尘器,由于各种原因导致投运后排放一直超标。2009年4月改造为电-袋复合除尘器,取得良好效果。     

FE型电袋复合除尘器在大型燃煤机组上的应用

介绍了FE型电袋复合除尘器的特点,以及其在大型燃煤机组上的应用情况,运行结果显示,该新型除尘器不仅可以满足更高的排放要求,而且可以长期稳定运行,并对细微粉尘有更好的捕集效果;可从根本上解决大型燃煤机组粉尘排放的难题。     

电袋复合除尘器大型化的关键技术探讨

通过对电袋复合除尘器大型化几个关键问题的分析,寻找应对的技术措施,并通过试验研究和工程实践的完善,使这些技术在大型化方面取得重大突破,并成功应用于大型燃煤电站的烟气治理。     

燃煤电厂电-袋复合除尘器滤袋损坏原因分析

着重对电-袋复合除尘器存在的PPS滤袋短期内出现非寿命期大面积损坏的原因,以及针对电-袋复合除尘工艺技术中的部分不同意见,进行了进一步的分析和探讨;提出电-袋复合除尘器与袋式除尘器在技术经济上并没有特殊优势,且电-袋复合除尘器在应用中已发现了一些重大问题,因而应引起有关重视,在选择采用这种工艺技术时要慎重。     

电-袋复合除尘器功效探究

针对当前认为电-袋复合除尘器是一种新的除尘技术的观点,分析探讨了目前国内采用的电-袋复合除尘器的功效,指出电-袋复合除尘器实际为前电后袋式的电-袋结合除尘器,因而存在许多弊端,并不能克服电除尘器和袋式除尘器各自的缺点。     

电袋复合除尘器的滤料试验与应用

清灰周期与阻力是除尘器的主要技术性能指标。本文研究了粉尘浓度及荷电粉尘对清灰周期与阻力的影响，总结了影响电袋复合除尘器性能的主要因素，介绍了电袋复合除尘器的应用实例，并分析了电袋复合除尘器的适用性。     

电袋复合除尘器电区与电除尘器差异分析

近年来电袋复合除尘器的应用越来越广泛,不少人认为电袋复合除尘器的电区与电除尘器一样,故完全套用电除尘器的标准。文章从设计参数、结构和电气配套方面详细分析了电袋复合除尘器的电区与电除尘器之间存在的差异,为电袋复合除尘器的设计提供指导,以利于提升电袋复合除尘器的技术水平。     

大型燃煤电站电袋复合除尘器的应用研究

对大型燃煤电站电一袋复合除尘技术进行了较全面的分析研究，如气流组织最优方案确定、脉冲喷吹系统选型及参数优化、粉尘荷电对滤料阻力的影响及高压电源的优选等。研究表明对电袋复合除尘器来说，袋式除尘区采用阶梯式布置是一种较为理想的气流组织方式，活塞式脉冲阀具有更好的清灰性能，粉尘的荷电有助于减小除尘设备的阻力，三相电源的性能优于单相电源。     

低低温电除尘器与电袋除尘器的技术经济对比分析

低低温电除尘和电袋除尘是燃煤电厂两种典型的颗粒物超低排放技术.文章综述了低低温电除尘器和电袋除尘器的研究进展,并进行了技术对比.另外,以某660MW机组为例,将低低温电除尘与电袋除尘的烟气净化系统进行经济性比较.结果表明,各烟气工况下满足除尘器出口粉尘浓度低于15mg/m3的设计要求时,低低温电除尘(包括烟冷器和电除尘...     

城镇化建设中乡村环境保护关键点分析

城镇化是推动我国经济社会发展的重要动力,在高速发展的同时,带来大量污染排放,威胁乡村环境质量与可持续发展。在对乡村生态环境问题剖析的基础上,从战略、实施、方式等层面探索解决思路,围绕科学规划、发展方式、基础建设、管理机制、宣传教育等方面分析关键点,加强乡村环境保护,保障城镇化建设健康发展,为促进农村农业持续发展提供持久动力。     

Investigation of the toxicity of the products of decoloration of Amaranth by Trametes versicolor

Trametes versicolor decolorized 2000 mg L(-1) of the mono-azo substituted naphthalenic dye Amaranth with no dye sorption observed visually. The changes in the toxicity were assessed over a period of 30 d for the dye-treated viable culture, control (no dye added), and a boiled culture treated with dye, using the Microtox Acute Toxicity assay. Before dye addition, the culture filtrate had some toxicity, which increased after the dye addition. The toxicity of the dye-treated culture decreased during the treatment. The loss of toxicity occurred at the same time, with the loss of color suggesting that detoxification is associated with decoloration. The change in pH was due to natural metabolic processes and had a small effect on detoxification. Because the toxicity of the treatment was similar to that of the control at the end of the treatment, the effluent seems to be safe for release into the environment, potentially rendering this treatment suitable for industrial application.     

山东省环境经济系统地域分异研究

环境保护与经济发展相协调,是人类社会持续发展的必由之路.环境经济系统是由环境子系统和经济子系统耦合而成的复合大系统.在用系统论对环境经济系统进行结构分析的基础上,采用主成分分析法和加法合成原理,对山东省17地市环境经济系统进行综合分析和类型划分,并从地域差异角度提出了分区特点及今后的发展建议,以期为山东省环境经济系统高水平协调发展提供决策依据.     

随机规划在泵站树状给水管网优化中的应用

泵站树状给水管网流量具有随机性,而这种随机性变化会直接影响管网的建设费用和动力费用.针对这-特点,应用随机规划原理,建立泵站树状给水管网机会约束模型,编写基于随机模拟的遗传算法程序求解该模型.机会约束模型能较客观地反映该管网的实际工况,使优化设计结果更符合实际.     

Numerical and experimental investigation of state of health of Li-ion battery

ABSTRACT

Estimation of State of Health (SoH) of Lithium-ion (Li-ion) battery is essential to predict the lifespan of batteries of an electric vehicle (EV). The efficient prediction of battery health indicates to the effective and safe operation of EV. However, delivering an effective and accurate method for the estimation of SoH in the real condition is truly a challenging task. The present study proposed a holistic procedure of combining both experimental and numerical investigations to conduct the fundamental study on coupled mechanical-electrochemical behavior of Li-ion battery. The proposed investigation highlighted the effect of stress on the capacity of the battery, considering capacity fade as an equivalent parameter to its health for real-time estimation of SoH. Finally, a simple model of Artificial Neural Network (ANN) is provided, which shows the linear dependency of stress with the SoH. The results obtained from the ANN model are validated with a Linear Regression (LR) model for a better understanding of the inspection. The predicted value of mean Square Error (MSE) and R square error in the ANN training model are found to be 0.000309 and 0.849687, respectively. Whereas for the test model, these predicted values are found to be 0.000438 and 0.819347, respectively.     

MAPGIS在龙口市土地利用现状数据库建设中的应用

以中国地质大学开发的MMPGIS通用型地理信息系统软件为基础,以山东龙口市2004土地利用现状为例,介绍了龙口市土地利用信息系统建设的方法与步骤,包括影像数据的纠正,矢量数据、属性数据的采集,以及数据入库方法,最后提出了在建库过程中遇到的一些问题.     

Patterns of television viewing and of perceptions of hazards to life

A previous study using respondents in a London regional audience appreciation diary panel showed that links existed between overall amounts of the viewing of television recorded across one week and levels of perception of risk of three hazards to life, namely lightning, flooding and terrorist bomb attacks. With a fourth hazard, cancer, there was an inverted U-shaped relationship between perceived risk level and amount of viewing. At the same time there were no relationships between amounts of viewing of news and documentary material and perceived risks of any of 12 hazards. Two new surveys were done, nearly three years after the previous one, asking people in widely different regions about their perceptions of nine various hazards, and linking these results with measures of attitudes towards certain adaptations of new technology (which could prove hazardous or beneficial according to points of view) and to patterns of television viewing. The two surveys agreed on a wide number of points with each other; they agreed with the previous study in finding no steady relationships between information programme viewing and hazard perception. Lightning and flooding were again related, this time more specifically with viewing of particular types of television programming. A new finding is that heavier viewing of television sport is associated with less perceived risk of cancer and of nuclear pollution. Interpretations are generally favoured along the lines of a selective process of viewers with certain predispositions choosing certain kinds of viewing patterns, rather than that programme contents provide an example for formulating perceptions and attitudes.     

开发白洋淀旅游资源的制约因素与对策

作者在实地调查研究的基础上，认为制约白洋淀旅游业发展的因素主要有水位不稳、水质受到污染、旅游项目内容贫乏、参与性差、景区文化氛围不和谐，以及管理不到位。作者提出，应努力保持其水位稳定，加强流域内污染治理，理顺管理体制，建立白洋淀湿地保护区，加大旅游资源开发和宣传力度，丰富旅游的文化内涵等来保证白洋淀旅游的可持续发展。     

资源丰度的定量计算

提出了一种通用的定量计算方法,即用规范化指数表示各地区的资源丰度,用“度”作为资源丰度的计量单位。指数表示法计算的资源丰度值实现了资源丰度在可比尺度上的综合评价。它概念明确,简单易行,具有可比性和可传递性,从理论和应用方面来说都具有许多优点。