济源市煤气气质有望得到根本性好转

2006年7月24日．济源中裕燃气公司煤气脱硫工艺改造项目正式进入了实施阶段，该项目将对济源市煤气储配站净化工段的脱硫工艺进行改造．增加一套更为先进适用的脱硫装置．从而更好地脱除外供煤气中的硫化氢含量，进一步改善煤气质量。     

济钢煤气结构调整的实施及深化

通过对济钢燃气发电厂煤气结构调整的实施,系统总结和梳理了煤气结构调整的思路、实施项目以及在项目实施过程中所采用的技术,分析了煤气结构调整实施后的效果.     

脱硫再生一体化系统在煤气脱硫中的应用

分析了处理含有硫化氢煤气工艺系统的一种方法,并讨论了常规脱硫系统和脱硫再生一体化系统的技术对比及其经济效益,旨在从实际出发逐步完善煤气脱硫化氢项目各工况下的脱硫方案,为我国煤气脱硫化氢项目技术的发展贡献一份力量.     

发生炉煤气生产系统的改进

针对发生炉煤气生产过程中出现的密封性不好、气化过程不稳定等问题,从煤气生产系统的密封方式、煤气浓度监测及加煤系统煤气泄漏治理、煤气发生炉炉体结构、煤气生产控制方法、煤气发生炉蒸汽系统等方面提出了改进措施。运行实践表明,具有良好的安全生产、节能减排、经济方面的效益。     

城市煤气规划可行性研究的主要内容

<正> 可行性研究是一门保证实现建设项日景佳效果的综合性科学,它在整个煤气工程建设中占有重要地位。目前国际上非常重视建设项目的可行性研究,不但把它做为确定项目,编制下一阶段设计的基础,而且把它做为向银行贷款,筹集资金的依据。因而在我国目前资金不足,申请国外贷款已成为发展城市煤气重要途径的情况下,进行城市煤气     

模糊技术在煤气调度中的应用研究

介绍煤气调度过程以及煤气调工的任务和工作内容，提出一个煤气调度模型，在此基础 研究如何利用模糊技术实现煤气调度控制以保证煤气管网安全，可靠，经济地运行，并给出一种实现模糊化的方法。     

江西新余钢铁公司民用煤气净化系统改造工程简介

江西新余钢铁公司的民用煤气用户不断增加，煤气净化系统已严重超负荷运行，煤气质量下降，煤气中H2S、萘含量严重超标。为确保民用煤气的质量，计划对该系统进行改造。     

南京市人工煤气类别的确定

本文回顾了南京市人工煤气气源从单一气源厂供应焦炉煤发展到三个气源厂供应焦炉煤气发展到三个气源厂供应四种人工煤气的历史以及给煤气供应在互换性和安全性上带来的麻烦，论述了确定人工煤气类别的必要性。     

钢铁企业副产煤气定价模式探讨

钢铁企业副产煤气的合理定价十分重要,它直接影响项目的经济效益,影响用气和供气企业的公平交易。副产煤气定价有比价法和机会成本法两种模式,其中,机会成本法定价较为公允,建议钢铁企业副产煤气定价采用以发电利润为基准的机会成本法来确定副产煤气的价格。     

变压煤气发生炉的开发

变压煤气发生炉是一种以碎煤为原料直接生产带压原料煤气和燃料煤气的制气设备。     

中国城市国际化的历程、特征与展望

通过回顾中国国际化城市的总体历程可知:从定位看,国际化城市大致可分为国际化大都市、区域性国际城市和专业特色国际城市三类;从空间分布看,国际化城市大多为沿海、沿江、沿边开放城市,以及内陆省会开放城市和经济体制改革试点城市;从人口,经济特征看,国际化城市呈现出人口、经济和产业结构与国际化定位匹配的特征.我国一方面应编制国家...     

《数据中心机房的系统设计》消防问题及对策

选择安全、环保、效果好的灭火产品要考虑灭火产品的安全环保性、经济合理性、产品的适用性、可调整性等综合性能;在国际、国内应用的广泛性及大型项目的业绩;在国际、国内获得的产品的认可及认证;系统设计的配套工具如系统设计计算的软件等。     

Influence of pH and TOC concentration on Cu,Zn, Cd,and Al speciation in rivers

Dissolved ( < approximately 4 nm, dialysis in situ), colloidal ( < 0.45 microm filtered, minus dissolved) and particulate (total, minus < 0.45 microm filtered) concentrations of Cu, Zn, Cd, (Al) in eight (three) mining polluted rivers were determined by atomic absorption spectrometry (flame and graphite furnace). The metal size distribution in the rivers was compared to pH, Ca concentration, alkalinity, conductivity, and total organic carbon (TOC). Data plots based on the present and other studies also yielded information about the interrelations between TOC, pH and metal adsorption in rivers and lakes. Less than 10% of Cu, Zn, and Cd were sorbed on particles or colloids in two rivers with average pH at 3.1 and 5.1, whereas 46%, 21%, and 21% of Cu, Zn, and Cd, respectively, occurred in sorbed form in six pH neutral rivers. In three pH neutral rivers, on average 55% of Al was in colloidal form, whereas the dissolved and particulate fractions were 21% and 23%, respectively. Our data combined with data from similar studies support conclusions from other research suggesting that the percent fraction of metals adsorbed on particles rises steeply from almost zero to nearly 100% within a narrow and element specific pH range. Changes in TOC concentration seem capable of shifting the pH to % metal absorption curves in the order of one pH unit.     

碱-矿渣水泥缓凝物质的选择研究

研究了氯化钡、硝酸钡、硫酸铁、铬酸钠、氯化镁、硫酸镁、硫酸铝等无机盐以及酒石酸、草酸等有机酸对碱-矿渣水泥凝结时间的影响.试验结果表明,氯化钡、硝酸钡、氯化镁、硫酸铝、酒石酸有良好的缓凝作用,硫酸铁、铬酸钠、硫酸镁、草酸不产生缓凝作用.通过强度测试发现,氯化钡、硝酸钡、氯化镁、硫酸铝、酒石酸均对碱-矿渣水泥的强度有一定的不良影响.     

海外石油项目环境合规性规范体系研究

海外石油项目的环境合规性管理意义重大,环境合规性管理的关键问题是识别合适的规范体系。从法学理论分析,资源国法律及其批准的国际公约、投资开发协议所要求的法律法规、金融机构的融资担保合同中所要求的法律法规、投资母国的法律规范构成了对海外石油项目的硬法约束;国际组织通过约束跨国公司行为的协定指南、企业加入的自愿性承诺、国际行业标准以及被视为最佳实践和惯例的标准导则构成了软法约束。本文结合主要国际石油公司的环境合规性实践分析,认为在实际管理中,可以根据规范来源与效力、企业追求目标等因素将上述规范区分为核心规范和其他规范,其中核心规范进一步区分为必选规范和可选规范。     

住宅装修污染及其防治

因装修引起的住宅室内空气污染主要包括甲醛污染、苯类污染、氨气污染和氡气污染。分析上述污染物的来源，介绍光触媒、臭氧、负离子、活性炭、抗污染花草等多种室内空气污染治理方法，比较各种治理方法的利弊特点。     

线的演绎——构成视角下西方建筑解读

构成体系下,强调几何抽象的点、线、面、体是最基本的视觉造型元素。其中,"线"作为建筑语汇,具有造型、表意和组织等多种功能,在建筑构成中发挥着重要作用。本文用理性和抽象的方法,从构成视角出发,分析了西方现代建筑创作中关于线性要素与建筑的结构、形态、空间以及秩序等构成层面的关联性,探究其形式表现背后的构成逻辑,从而开阔建筑创作视野。     

浅谈城市消防安全分级制

引入分级制概念，概述了英国、日本、中国香港和美国的城市消防分级制总体状况，着重介绍了美国在分级时所考虑的特征、对应的扣分值和所涉及的条款，包括供水、消防局、消防通讯、防火安全控制和补充条款环境、气候等因素及应用范围，进而提出了在我国开展消防安全分级制的必要性。     

Water Resources Development: A Balanced Approach

Customers, the public generally, the water industry, its regulators and the government are aware that water can be a scarce and costly product. Resource planning and development must increasingly be viewed as a combined package of water efficiency in (a) use, (b) metering and tariff policy, (c) leakage reduction, and (d) physical schemes.
Droughts, fears over possible climate change, concerns about resources and the environment, a greater awareness of the role and costs of the water industry and statements by the Department of the Environment, the Office of Water Services, and the National Rivers Authority have added weight to this sensible shift in emphasis.
However, society needs reliable water supplies and cannot completely rely upon the uncertain impact that demand side-measures may bring about – nor, even where achieved and cost-effective, on the important savings in losses. New resource schemes can take many years to implement. Therefore, in order to ensure adequate and reliable supplies, plans for new schemes must be brought to a state of readiness, and, in many cases, implemented.     

Application of real-time quantitative PCR for the detection of selected bacterial pathogens during municipal wastewater treatment

Bacteria were detected at five stages of municipal wastewater treatment using TaqMan(R) real-time quantitative PCR (qPCR). Thirteen probe and primer sets were tested for diverse pathogens that may be present in wastewater, including Aeromonas hydrophila, Bacillus cereus, Clostridium perfringens, Enterococcus faecalis, Escherichia coli, E. coli O157:H7, Helicobacter pylori, Klebsiella pneumoniae, Legionella pneumophila, Listeria monocytogenes, Pseudomonas aeruginosa, Salmonella sp., and Staphylococcus aureus. The sensitivity of the assay was 100 fg of genomic DNA (=22 gene copies), based on a standard curve generated using A. hydrophila purified DNA. Samples from five stages of wastewater treatment were collected, including raw wastewater, primary effluents, mixed liquor, waste activated sludge and final effluents. In duplicate samples, E. coli, K. pneumoniae, C. perfringens and E. faecalis were detected throughout the wastewater process, and their numbers decreased by 3.52-3.98, 4.23-4.33, 3.15-3.39, and 3.24 orders of magnitude respectively, between the raw wastewater and final effluent stage. This qPCR method was effective for the detection of pathogens in wastewater and confirmed that the risk of exposure to pathogens in the wastewater discharge was well within the Environment Canada guidelines.