烟囱用耐候钢在海水脱硫烟气中的腐蚀

海水脱硫不需额外消耗淡水和吸收剂,工艺简单,维护方便,经济优势明显。本文通过电化学技术、现场挂片试验研究了海水脱硫后烟气对电厂烟囱钢内筒Corten、Sten-3钢的腐蚀行为影响。研究结果表明:实施海水脱硫工艺后会加速烟囱内筒Corten钢和Sten-3钢的腐蚀,对Corten钢的影响更为明显。脱硫烟气中Corten钢的年腐蚀速率约是Sten-3钢的1.6～1.7倍。Corten钢和Sten-3钢在脱硫烟气中约1年达到稳定腐蚀状态,初期的腐蚀产物以亚铁硫酸盐为主,钢中添加的Cr、Cu、V、Sb等未起到足够的保护作用。     

我国首家海水烟气脱硫示范工程建成

深圳能源集团投资２．１５亿元建设的深圳西部电厂海水烟气脱硫工程，３月８日２０时，通过了７２小时连续试运行，移交生产。这是国内首家海水烟气脱硫示范工程，在目前世界上已投运的同类装置中也是最大的。海水烟气脱硫工艺是用于燃煤电厂的新型烟气脱硫工艺，利用天然海水作烟气中二氧化硫的吸收剂，无需其他添加剂，也不产生任何废弃物，具有技术成熟、工艺简单、系统可靠、投资省、运行维护费用低运行稳定等特点，适用于燃煤含硫量不高，并以海水为循环冷却水的海边电厂。目前在挪威、西班牙等国家和地区已广泛应用。西部电厂海水烟气…     

烟气海水脱硫排水水质对周边海域的影响分析

从理论计算和国内外已投运工程的实际运行监测两方面,对海水脱硫排水水质进行了分析,结果表明在采用成熟工艺的前提下,海水脱硫的排水水质包括重金属等指标,全部可以达到我国海水三类标准,绝大部分指标满足海水一类标准,而且通过对国内外已经投运项目的长期监测,也未发现对周围海域的生态环境造成不利影响。     

ABB脱硫技术NID──新型一体化脱硫系统Flakt－Hydro海水脱硫工艺

ＡＢＢ脱硫技术ＮＩＤ──新型一体化脱硫系统Ｆｌａｋｔ－Ｈｙｄｒｏ海水脱硫工艺ＡＢＢＤｅｓｕｌｆｕｒａｔｉｏｎＴｅｃｈｎｏｌｏｇｙＮＩＤ－ＮｅｗＩｎｔｅｇｒａｌＤｅｓｕｌｆｕｒａｔｉｏｎＳｙｓｔｅｍＦｌａｋｔ－ＨｙｄｒｏＤｅｓｕｌｆｕｒａｔｉｏｎＴｅｃ...     

浅谈火电厂烟气脱硫的特许经营模式

介绍了火电厂烟气脱硫特许经营模式（BOOM）发展的必要性和特点,该方式可使国家、火电厂、脱硫公司三方受益。文章还介绍了烟气海水脱硫在国内外的技术进展,列举了火电厂烟气海水脱硫采用BOOM模式的实例。     

基于湿法脱硫工艺的船舶尾气处理系统设计分析

对比介绍了可用于船舶尾气处理的脱硫技术,并对可行性较高的镁法和钠法脱硫工艺进行了技术经济分析。结果显示:两种工艺的设备基本相同,主要区别在于脱硫剂的不同;钠法的脱硫剂消耗费用是镁法的4. 4倍,总运行费用大约是镁法的2. 4倍;总体而言,与换用低硫燃油的方式相比,湿法脱硫的成本降低了60%～85%,如在非排放控制区采用海水法脱硫,总运行成本还能进一步降低。可基于现有的水处理技术,选择合适的脱硫废水处理工艺,实现达标排放或回用。因此采用湿法脱硫处理船舶尾气的方法适合大规模推广。     

福建省沿海电厂脱硫技术的选择

相对于钙法、氨法脱硫技术,海水脱硫在脱硫、脱氮效果、一次性投入、综合运行费用和避免二次污染方面有一定优势,在我国沿海电厂具有广阔的应用前景。本文重点介绍了海水脱硫技术,并对福建省今后SO2减排治理工作提出了建议。     

优化FGD脱硫废水处理工艺的建议与措施

石灰石-石膏湿法烟气脱硫(FGD)工艺是目前运用最普遍的火力发电厂脱硫工艺,在脱硫过程中会产生一定量的脱硫废水,由于其水质特殊,必须设置单独的处理设施。文章简要介绍了脱硫废水产生原因,对脱硫废水水质、水量特点进行阐述,结合工程实例介绍脱硫废水处理工艺,从设计和运营方面分析脱硫废水处理工艺存在的问题并给出优化建议与措施。     

旋转喷雾干燥法(SDA)脱硫工艺系统的应用研究

本文介绍了旋转喷雾干燥法（SDA）脱硫工艺的基本原理、化学过程、主要设备、控制、脱硫副产物、系统运行与维护等,并与石灰石/石膏湿法脱硫工艺、烟气循环流化床工艺进行了比较,给出了脱硫系统投资及运行费用的经济比较。还对SDA脱硫工艺在国内应用中存在的问题进行了探讨。     

氨法烟气脱硫工艺在燃煤锅炉的应用

介绍了氨法脱硫技术在国内外的应用情况以及氨法烟气脱硫工艺的工作原理和工程应用难点;分析了热电厂煤粉锅炉烟气脱硫的工艺路线特点及新型氨法脱硫工艺应用后取得了的显著效果;提出了氨法脱硫工艺存在的问题和发展前景。     

现阶段国内外城市固体废弃物的治理技术与治理概况

城市固体废弃物是人们在工业生产活动、生活活动及商业活动中所产生的固体废物,这种废物随着国民经济的发展、人口的增长、人民生活水平的提高,数量不断增加。它破坏了市容,污染环境,给人民健康带来了极大的危害,因此,需加以处置和处理。本文将系统地介绍现阶段国内外城市固体废弃物的现状及处理技术,并针对我国国情,提出合理化的处理方案。     

塔里木河上游及源流区草原荒漠化及其防治研究

加强生态环境保护和建设是西部大开发的战略重点。针对塔里木河流域环境恶化、草地开发利用失衡、草原荒漠化日趋严重的问题,提出具体规划和综合治理方案。     

迎评促建期间大学生思想政治工作的开展与思考

搞好大学生思想政治工作对促进学校的建设工作意义重大.针对当前我院迎评促建工作中的学生思想上存在的误区,应进一步加强宣传、加强思想政治工作队伍建设以及不断总结过去和创新现在,根据当前迎评促建工作的实际,采取一定措施.     

中小城市的光污染及防治对策

我国经济处于高速增长期,建设日新月异,中小城市的光污染问题日趋明显,防治显得十分重要。文章以中山市城区为例,对道路照明、建筑照明、广告照明、绿化照明,以及玻璃幕墙反射等光污染情况进行了调研和评价。根据中山市城区的光污染情况,从制定和完善光污染防治法规体系、加强规划和宏观管理、提高公众参与力度和监督力度、加大人才培养和政策扶持力度、加大清洁生产推广力度以及实施照明设计单位资质认证等多方面提出了对光污染的防治对策。     

环境、资源统计与核算

本文从国家实施可持续发展战略出发，分析了环境统计工作存在的问题。提出了可持续发展的环境，资源统计与核算的新概念。     

Bauxite and alumina: trends and prospects

During the past 25 years the bauxite and alumina industry has grown threefold creating major change in the industry structure and reducing the dominance of the majors. Australia has emerged as the leading producer with a major third party alumina market developed principally by Alcoa of Australia. Future growth while, less dramatic, is likely to be substantial requiring US$50 billion to fund new projects which will be concentrated in developing countries with large bauxite reserves and developed infrastructure.     

Smart and eco-cities in India and China

ABSTRACT

Smart and eco-cities have become important notions for thinking about urban futures. This article contributes to these ongoing debates about smart and eco-urbanism by focussing on recent urbanisation initiatives in Asia. Our study of India’s Smart Cities Mission launched under the administration of Narendra Modi and China’s All-In-One eco-cities project initiated by Xi Jinpin unfolds in two corresponding narratives. Roy and Ong’s [2011. Worlding Cities: Asian Experiments and the Art of Being Global. Oxford: Wiley-Blackwell] “worlding cities” serves as the theoretical backdrop of our analysis. Based on a careful review of a diverse set of academic literature, policy and other sources we identify five process-dimensions for analysing the respective urban approaches. We show how the specific features of China’s and India’s urban focus, organisation, implementation, governance and embedding manifest both nations’ approaches to smart and eco-urbanism. We argue that India’s Smart City Mission and China’s All-in-One project are firmly anchored in broader agendas of change that are set out to transform the nation and extend into time. The Indian Smart City Mission is part of a broader ambition to transform the nation enabling her “smart incarnation” in modernity. Smart technologies are seen as the key drivers of change. In China the framework of ecological civilisation continues a 5000-year historical tradition of civilisation excellence. By explicitly linking eco-urbanism to the framework, eco-cities become a means to enact ecological civilisation on the (urban) ground.     

浅谈油气开发与环境安全

文章分析了油气能源现状、油气开发与环境的关系、油气开发与环境安全的关系,油气开发中的环境保护对策与环境监理。得出:油气开发既要做到和谐生产,又要保护环境;在油气开发中,对环境有影响的应加大修复力度,采取相应的环境保护措施,确保有效、长效的环境保护目标。     

Transport and fate of nitrate and pesticides: hydrogeology and riparian zone processes

There is continuing concern over potential impacts of widespread application of nutrients and pesticides on ground- and surface-water quality. Transport and fate of nitrate and pesticides were investigated in a shallow aquifer and adjacent stream, Cow Castle Creek, in Orangeburg County, South Carolina. Pesticide and pesticide degradate concentrations were detected in ground water with greatest frequency and largest concentrations directly beneath and downgradient from the corn (Zea mays L.) field where they were applied. In almost all samples in which they were detected, concentrations of pesticide degradates greatly exceeded those of parent compounds, and were still present in ground waters that were recharged during the previous 18 yr. The absence of both parent and degradate compounds in samples collected from deeper in the aquifer suggests that this persistence is limited or that the ground water had recharged before use of the pesticide. Concentrations of NO(-)(3) in ground water decreased with increasing depth and age, but denitrification was not a dominant controlling factor. Hydrologic and chemical data indicated that ground water discharges to the creek and chemical exchange takes place within the upper 0.7 m of the streambed. Ground water had its greatest influence on surface-water chemistry during low-flow periods, causing a decrease in concentrations of Cl(-), NO(-)(3), pesticides, and pesticide degradates. Conversely, shallow subsurface drainage dominates stream chemistry during high-flow periods, increasing stream concentrations of Cl(-), NO(-)(3), pesticides, and pesticide degradates. These results point out the importance of understanding the hydrogeologic setting when investigating transport and fate of contaminants in ground water and surface water.