垃圾焚烧发电厂脱硝技术及应用

介绍了垃圾焚烧烟气烧脱硝控制的主要技术及应用情况,以及非催化还原技术的应用实例,采用该技术,氮氧化物排放值可满足现阶段排放要求。     

浅析珠三角地区有机废气治理技术的开发应用

珠江三角洲地区大气污染最明显的特点就是臭氧浓度的升高导致大气氧化性增强,而挥发性有机化合物(VOCs)和氮氧化物是大气臭氧生成的重要前体物。珠三角地区工业体系发达,VOCs的生产及使用企业众多,由于VOCs的种类繁多,性质各异,排放条件多样,目前已经形成了一系列的VOCs废气实用治理技术。     

钢铁厂烧结烟气SCR脱硝技术应用探讨

目前烧结烟气脱硝主要采用活性炭(焦)吸附技术,投资及运行费用极高。SCR(选择性催化还原)烟气脱硝技术广泛应用于燃煤锅炉,技术成熟可靠。针对钢铁厂烧结烟气的特点,探讨了将SCR烟气脱硝技术应用于烧结烟气脱硝;通过适当的工艺优化和技术创新,烧结烟气采用SCR脱硝技术完全可行,经济适用。     

660MW超超临界燃煤机组袋式除尘器的设计

简介了660MW超超临界燃煤机组袋式除尘器的技术性能参数;阐述了袋式除尘器的设计方案及系统组成,以及除尘器除尘室间的气流分配、除尘室内的气流分布以及气流分布合理的重要性;引用运行数据说明除尘器工艺参数、结构参数、气流分配及气流分布设计的合理性.     

捕集阱顶空-气相色谱/质谱法检测地表水中25种挥发性有机物

建立了捕集阱顶空-气相色谱/质谱法检测地表水中25种挥发性有机物的分析方法。采用正交实验设计对捕集阱顶空条件进行了优化,该方法相关系数0.995,加标回收率为90%~110%,方法检出限为0.08~0.39μg/L,相对标准偏差(n=7)为0.7%~4.8%,仪器检出限低于0.04μg/L。方法准确度和灵敏度较好,可以满足对地表水中25种挥发性有机物的检测要求。     

北京兰天热能系统工程探讨

文章通过综合分析、计算 ,提出用天然气代替煤作主要能源 ,走燃机热电联供道路 ,解决北京市大气环境恶化的问题 ,并对这一工程方案实施的可能性和优越性作了阐述 ,最后提出了多项实施建议。     

城市煤气输配过程中的变频调速自动恒压控制系统

将河南平顶山煤气公司原煤气输配系统改造成为自动恒压控制系统,从而提高安全系数,降低煤气输配电耗。     

Two-Compartment Sorption of Phenanthrene on Eight Soils with Various Organic Carbon Contents

Sorption characteristics of phenanthrene (PHE) were studied on eight soils with organic carbon contents spanning over an order of magnitude using phase distribution relationships (PDRs) at 1 h, 48 h, and 720 h contact times. A new algebraic method was employed to describe the sorption characteristics at different time intervals (between 1 h and 48 h, and 1 h and 720 h). It was found that nonlinearity increased with increasing contact time and sorption that occurred in the subsequent time interval following the initial 1 h exhibited stronger isotherm nonlinearity. Sorption coefficients were positively correlated with the organic carbon contents of the soils. Detailed sorption dynamics were also examined on these soils. A two-compartment, first-order model was used to describe the sorption dynamics. The rate constants of the two compartments differed 18–170 times, suggesting the dissimilar sorption behaviors of the mathematically separated compartments. These two compartments were labeled fast and slow sorption compartment according to the rate constants. Calculation showed that the fast compartment accounted for over 80% of the overall sorption at the initial 1 h, while the slow compartment predominated the total sorption in the following 47 h. By combining the discussion of PDRs and sorption dynamics, the contributions of the two compartments to linear and nonlinear sorption were differentiated. The slow sorption compartment made a major contribution to nonlinear sorption and possibly to sequestration of organic pollutants by these soils.     

长江三峡花岗岩地区土壤流失时间分布特性

长江三峡花岗岩地区坡面土壤流失以耕地砂砾化面蚀和有部分植物覆盖坡面的鳞片状面蚀为主，该地土壤流失研究结果表明，由以上两类面蚀导致的土壤流失量月分布与月降雨量的分布基本趋势一致，二者呈现较为明显的线性相关关系。地面坡度＞３０°的裸地土壤流失量达５０００ｔ／ｋｍ３·ａ以上，覆盖度≥０．７０的林地土壤流失量＜５００ｔ／ｋｍ２·ａ，该流域土壤流失量为１５４４．１４ｔ／ｋｍ２·ａ，产沙量为６９４．８６ｔ／ｋｍ２·ａ     

Environmental Damage,Abandoned Treaties,and Fossil-Fuel Dependence: The Coming Costs of Oil-and-Gas Exploration in the “1002 Area” of the Arctic National Wildlife Refuge

Contrary to claims from American politicians, lobbyists, and oil and gas executives, allowing energy development in the Alaskan Arctic National Wildlife Refuge (ANWR) will harm the environment, compromise international law, erode the social significance of wilderness protection, and ultimately fail to␣increase the energy security of the United States. After exploring a brief history of the ANWR controversy, this piece argues that the operation of oil and gas refineries in ANWR will release discharged solids, drilling waste, and dirty diesel fuel into the ecosystem’s food-chain, as they have from oil operations in Prudhoe Bay. Less obvious but equally important, oil and gas exploration in ANWR will violate a number of international treaties on biodiversity protection. In the end, development in ANWR will threaten the concept of wilderness protection, and will do little to end US dependence on foreign sources of energy. About the Author: Benjamin K. Sovacool is a doctoral candidate in the Department of Science and Technology Studies at the Virginia Polytechnic Institute & State University in Blacksburg, Virginia. He works as a research analyst for the Consortium on Energy Restructuring and is a Senior Research Fellow for the Virginia Center for Coal and Energy Research. He also just completed a Graduate Fellowship in Energy Policy at the Oak Ridge National Laboratory in Oak Ridge, Tennessee. Readers should send their comments on this paper to: BhaskarNath@aol.com within 3 months of publication of this issue.