工业用制氧机噪声控制方案

在大型炼钢生产工艺过程中,需要制备大量的氧气.由于空气流量大,制氧机进口噪声大,对周围环境和工作人员造成了极大的危害.对某钢铁集团制氧机的噪声源进行了分析,并在现场调查的基础上,提出了制氧机噪声治理方案.经过测试,治理后的厂界噪声指标达到国家标准的控制要求.     

规划环境影响评价探讨

以《中华人民共和国环境影响评价法》为依据 ,对实施规划环境影响评价的意义进行了分析 ,并提出了规划环境影响评价应遵循的原则、方法和基本程序     

The SUCOZOMA program: results and challenges

The research program Sustainable Coastal Zone Management (SUCOZOMA), which was started in 1996 by the Swedish Foundation of Strategic Environmental Research, was motivated by the recognition of increasingly severe global, regional and national coastal problems. The program approached the complex issues of coastal eutrophication, fishing practices, and overexploited coastal resources, with a concerted effort involving multidisciplinarity, stakeholder cooperation, and a focus on the problems perceived as most serious by the public and decision-makers. As the program was concluded in 2004 it had resulted in the completion or near-completion of 22 doctoral dissertations and approximately one hundred publications. More than 40 scientists were involved in the program. G?teborg University was the host university, but important research teams have also been located at Stockholm University, the Beijer Institute, and the Kristineberg Marine Research Station of the Royal Swedish Academy of Sciences, and within the National Board of Fisheries. During the program, networks of stakeholders were established and SUCOZOMA had contributed to numerous political and administrative processes relevant for integrated coastal zone management (ICZM). SUCOZOMA program results can be grouped into different categories. Many of the projects in the two phases of the program produced results which can be defined as technical or practical and available for direct implementation in, e.g. mussel cultivation, restoration and safeguarding of spawning areas, seal-safe fishing gear or sustainable fishing of underexploited species. Other results can be characterized as policy oriented, and the impact of these can only be fairly evaluated as new policies are put into effect. SUCOZOMA resulted in important new knowledge regarding coastal science and management, but also concerning the organization required to conduct an end-user oriented multidisciplinary program effectively.     

基于三层结构的绿色招商选择体系研究

阐述了中国招商引资的基本情况及存在的问题,提出了进行绿色招商的必要性.在绿色招商选择系统结构分析的基础上,提出了基于三层结构的绿色招商选择体系,并根据该体系构建了s工业园的绿色招商选择体系.     

meteorological program for limiting power plant stack emission

This paper is directed to those individuals concerned with preserving the local air quality in areas affected by power plant operations. A meteorological forecast and field measurement program has been developed by the Tennessee Valley Authority for limiting stack emissions at the Paradise Steam Plant to preserve the air quality during adverse atmospheric dispersion conditions. Meteorological and plume dispersion criteria, developed from analysis of prior experience, govern the program. The criteria values are designed for limiting surface sulfur dioxide (SO₂) concentrations below an established threshold level.

Daily forecasts of vertical wind and temperature distribution, maximum surface temperature, and sky condition are issued each afternoon by the National Oceanic and Atmospheric Administration National Weather Service, Knoxville, Tennessee. Through use of power plant computer facilities, the forecast data are processed to determine quantitative criteria values. If the values indicate that the threshold level may be exceeded, an Air Pollution Control Notice (APCN) is issued that afternoon for the period 0900–1400 CST the following day, which is the expected period of maximum SO₂, surface concentrations. The APCN specifies the allowable SO₂ emission rate, in terms of megawatt load generation, which should prevent surface SO₂ concentrations from exceeding the established threshold level. Confirmation or cancellation of the APCN is made the following morning, based on plant-site meteorological field measurements taken at 0700–0730 CST. If confirmed, plant load generation is reduced to the designated level by 0900 CST and is continued no later than 1400 CST during the expected period of maximum SO2 surface concentrations.

The APCN conditions identified with the newer and larger TV A power plants with high stacks are associated with one principal regional weather pattern—a large surface high-pressure system, with weak-to-moderate anticyclonic circulation and pronounced stability throughout the lowest few thousand meters. With the limited mixing layer, or sometimes referred to as trapping- or capping-type dispersion associated with this weather condition, relatively high surface concentrations may persist 2–5 hours between 0900–1400 CST.     

Assessing the impact of the acid deposition control program

A goal of the acidic deposition control program in the United States has been to link emissions control policies, such as those mandated under Title IV of the US Clean Air Act Amendments (CAAA) of 1990, to improvements in air and water quality. Recently, several researchers have reported trends in the time series of pollutant data in an effort to evaluate the effectiveness of the CAAA in reducing the acidic deposition problem. It is well known that pollutant concentrations are highly influenced by meteorological and climatic variations. Also, spatial and temporal inhomogeneities in time series of pollutant concentrations, induced by differences in the data collection, reduction, and reporting practices, can significantly affect the trend estimates. We present a method to discern breaks or discontinuities in the time series of pollutants stemming from emission reductions in the presence of meteorological and climatological variability. Using data from a few sites, this paper illustrates that linear trend estimates of concentrations of SO₂, aerosol SO₄²⁻, and precipitation-weighted SO₄²⁻ and NO₃⁻ can be biased because of such complex features embedded in pollutant time series.     

清洁能源实施效果评价

2001年11月启动的中国国家"十五"攻关重大专项"清洁能源行动"涉及17个试点示范城市,经过3年多的探索与实施,取得了明显成效.着重从污染物排放、空气质量、清洁能源消费、人均能耗和万元产值能耗等环境效益方面对清洁能源实施效果进行科学评价,为推广试点示范城市的先进经验和城市可持续发展提供依据.     

National crop loss assessment network: quality assurance program

A quality assurance program was incorporated into the National Crop Loss Assessment Network (NCLAN) program, designed to assess the economic impacts of gaseous air pollutants on major agricultural crops in the United States. To satisfy US EPA requirements that all environmental data collected be of known and documented quality, adequate for the intended use, the quality assurance program developed standardized research and monitoring protocols among sites, and included a range of audit and review procedures. The goal of the quality assurance program was to quantitatively describe the overall quality of data collected in terms of precision, accuracy, completeness, representativeness, and comparability. From this program, it can be concluded that (1) project data quality objectives were valuable for determining the acceptability of data from diverse sites, (2) standardized protocols ensured data comparability among research sites, (3) independent on-site audits served to evaluate protocol adherence, and (4) precision and accuracy measurements provided a way to assess data quality, determine data acceptability, and indicate the need for instrument adjustment or repair.