填海工程影响下的电厂冷却水工程布置数值模拟研究

随着大亚湾北岸大规模填海造地工程的实施．将影响潮流流态，给拟建于该开发区的惠州LNG电厂循环冷却水工程优化布置带来困难。针对这种情况，利用数学模型对现状海域流场进行了验证计算；对规划岸线下的流场变化情况进行了模拟；对电厂温排水的运行扩散规律进行了模拟，在考虑取水温度、经济性、环保性的基础上。提出了优化布置方案。该方案较传统方法思路更优化、观点更符合环保要求，更具有前瞻性，为类似工程的设计、研究提供了有益的经验。     

600 MW电厂SCR烟气脱硝反应器内不同导流板的流场数值模拟

以600 MW电厂选择性催化还原反应器中导流板为研究对象,采用Fluent软件,对反应器内三种不同形态导流板进行反应器内流场的数值模拟,得出较合适的导流板形态及流场;同时还对在反应器内加入整流器前后的流场进行了比较.     

温排水对水体环境影响的数值模拟

电厂冷却水的合理排放和排放水体的温度预测能为水体环境影响评价提供科学依据.采用平面二维水流温度场数学模型,对池州电厂的温排水流场和温度场进行数值模拟.在流速验证的基础上,考察温度场的分布情况.分析结果显示,池州电厂二期扩建后的温排放对保护区及周边水体不会产生明显的热影响.     

贴体边界下潮汐河口热（核）电厂温排放数值计算

为了正确评估潮汐河口热（核）电厂温排放热水回归和对受纳水体的环境影响，河口地区的流场与温度场的数据计算在电厂可行性研究和初步设计阶段十分重要。本文通过特殊式Ｐｏｉｓｓｏｎ方程转换建立贴体边界系统，在实际计算过程中自然边界与计算边界贴合良好，从而改进了流场与温度场计算精度。通过对某电厂在潮汐河口温排放的数值模拟，取得了令人满意的结果，为电厂水工设计和取排水口工程布置方案提供可靠的依据。     

燃机电厂噪声模拟时SoundPLAN声源模型的简化

燃机电厂一般靠近用电负荷或城镇建设，为了有效地控制噪声，在燃机电厂项目的设计、环评等阶段对其噪声影响进行合理的模拟从而提出相应的降噪方案是非常必要的。结合国家标准，对燃机电厂的敏感目标和主要噪声的声源特性进行了总结。通过对比声源类型、中心频率的设置对模拟结果产生的影响，探讨了在应用SoundP-LAN软件对燃机电厂的噪声模拟时如何简化设置声源模型的问题，为今后的噪声模拟评估工作提供参考。     

多炉一塔脱硫工艺取消增压风机的可行性研究

多炉一塔脱硫工艺中通常设置增压风机，但在工程实践中增压风机存在着喘振、失速、高能：耗等诸多运行问题。以某自备电厂3台220t／h燃煤锅炉烟气脱硫工程为例，针对多炉一塔湿法脱硫工艺是否设置增压风机，从性能、能耗、运行维护成本等方面对设计方案进行了经济技术比较，并利用流场模拟对烟气系统进行了优化，最终通过引风机的改造替代了增压风机的设置，为小型燃煤电厂湿法脱硫工艺的系统设计提供参考。     

电厂温排放对感潮河段环境水体影响预测研究

电厂温排放对水环境影响研究是电力环境评价的重要组成部分。本文对临近河口两座大型电厂温排放分别进行了数值模拟与物模试验，对温排放的影响范围及温度场分布进行了预测，为环保部门提供了科学依据。     

用数值模拟方法研究挡风抑尘网高度对抑尘效率影响

采用数值模拟方法对某电厂露天煤场周围设置挡风抑尘网进行流场模拟,结合起尘量公式,计算了挡风抑尘网在不同高度下的抑尘效率。挡风墙高度分别12m、16m、20m、24m,当风速为4.3m/s时,挡风抑尘网效率分别为67.2%、81.4%、86.6%和88.3%;当风速为20 m/s时,抑尘网效率分别为55.1%、69.8%、74.6%和76.5%。     

某电厂水平衡试验及节水分析

对某电厂2×600 MW机组用水情况进行了水平衡测试,根据测试结果对该厂用水情况进行了分析评价,并提出了节水措施及建议.     

内滤式布袋除尘器滤袋内流场的数值计算

利用FLUENT6．1流体动力学计算软件，对内滤式袋式除尘器布袋内的流场、压力进行了计算模拟，得到了布袋尺寸、过滤速度、进出口压差变化时布袋内流场的变化情况，为袋式除尘器的改进和设计提供了理论依据。     

海水脱硫技术在日照电厂一期工程中的应用

随着国家节能减排政策的落实，我国沿海地区的很多大型燃煤电厂将选择烟气海水脱硫技术来改善大气环境质量。介绍了烟气海水脱硫技术在山东日照电厂一期工程中的应用情况，并对海水脱硫技术应用中出现的一些问题提出了建议。     

Inundation Analysis in the Coastal Area Considering Climate Change Due to Global Warming

This paper describes the possible inundation scenarios under sea level rise conditions due to global climate change with particular reference to Nagoya, Japan. The study was carried out by using a two-dimensional sea model integrated with one-dimensional river flow model and two-dimensional overland flow model. For the connections of models, the upstream discharge or downstream water level in each grid is considered as the boundary conditions. The governing equations used for the analysis have been solved by finite volume method. The analysis results implicate that some parts of densely populated coastal area of Nagoya city will be vulnerable to inundation if the sea level rise due to global warming by 1 m. Moreover, the performances of existing sewer system and inundation scenario under various conditions have been analyzed.     

Sea lagoons in Hong Kong for the disposal of pulverized fuel ash (PFA)

The design of lagoons for the dewatering and retention of ash from pulverised coal burned in a power plant in Hong Kong is described. To reduce pollution of nearby oyster beds the sea water used to convey the ash as a slurry is decanted and returned to the power plant for discharge into deep water.     

Integrated Coastal Management and River Basin Management

There are important functional relationships between river basins and coastal areas and one may influence the other. The two systems are linked through natural processes (water flow, sediment transport, energy) and human activities (urban development, rural activities, technical infrastructures, waste and pollution). Coastal areas are extremely valuable as they concentrate a rich diversity of natural habitat areas and a large variety of natural resources. River basins are also important areas from the point of view of natural ecosystems particularly on the basis of the presence of water and its support for the flora and fauna in the area. Coastal areas and river basin, at the same time provide opportunities for development of a wide range of human activities. The coastal zone is an essential part of a river basin. Both, river basin and coastal problems require a multi-sectoral approach. In some cases the two systems require a common framework of management. The goals, general objectives and principles of integrated river basin and coastal zone management are discussed.     

脱硫石灰石粉生产线设计及应用

以姚孟电厂脱硫石灰石制粉工程为例，介绍了水泥粉磨技术在电厂脱硫剂制粉中的应用。运行结果表明，系统运行良好、效率高、能耗低，可作为电厂脱硫石灰石制粉的专门技术。     

海水淡化技术在沿海电厂的应用前景

介绍了目前常用的几种海水淡化方法的工艺原理及其适用范围，并从可持续发展的角度阐明了沿海电厂生产用水采用淡化海水的可行性和必要性，为沿海新建电厂用水规划提供参考。     

Hydrogeomorphological Controls on Groundwater Quality in the Rattaphum Catchment (Songkhla Lake Basin), Thailand

The Rattaphum Catchment comprises four major hydrogeomorphic units: mountains, footslopes, plains and inland swamps around a lake system. The area accommodates three main agro-ecosystems: vegetable, rubber and fruits. During the high-rainfall period, groundwater levels rise near to the soil surface in all agro-ecosystems. The high water levels remain for 3–4 months in the coastal plain, while in other areas the groundwater level fluctuates according to the intensity of rainfall events during the 2–3 months of the rainy season. Groundwater salinity is higher near Songkhla Lake and decreases rapidly inland. It is generally lower near streams. Salinity is also lower during periods of higher recharge, increasing slightly during the dry season due to leaching of chemicals from the agricultural areas. In the saturated sandy soils with high hydraulic conductivity and in the vegetable agro-ecosystem areas with high water levels, the NO₃ level in groundwater always exceeds the WHO standard. Variations in NO₃ levels are closely related to patterns of landuse, with higher nitrate levels commonly found in vegetable areas and lower levels associated with fruit and rubber tree plantations. Nearly all groundwater and surface water is contaminated by coliform bacteria, with the level of contamination controlled by groundwater levels, the amount of rainfall and farm activities. Vegetable agro-ecosystems, which have the most intensive cropping system, were found to be the most polluted. In all of the agro-ecosystems, the most polluted period coincided with the first series of rainfall events.     

核电厂温排水余热综合利用方案设计的初步研究

核电厂温排水（循环冷却水）余热的充分利用,可以使原本要排放到大气或水域中的热量大大减少,甚至能实现电厂余热的＂零排放＂,在节约能源、产生巨大经济效益的同时,也达到了保护电厂温排水受纳水体免遭热污染的目的。在国内外温排水余热利用途径调研的基础上,运用生态工程理论和生态设计的理念,进行温排水余热综合利用方案设计的初步研究。     

Implications of Heterogeneous Chemistry of Nitric Acid for Nitrogen Deposition to Marine Ecosystems: Observations and Modeling

Size resolved particle composition and nitric acid (HNO₃)measurements from the ASEPS'98 experiment conducted in the BalticSea are used to provide observational evidence of substantialgas-particle transfer of oxidized nitrogen (N) compounds in themarine boundary layer. We then focus on the importance ofHNO₃ reactions on sea salt particles in determining spatio-temporal patterns of N dry deposition to marine ecosystems.Modelling results obtained assuming no kinetic or chemical limiton HNO₃ uptake and horizontally homogeneous conditions withnear-neutral stability, indicate that for wind speeds 3.5 – 10 ms^-1 transfer of HNO₃ to the particle phase to formparticle nitrate (NO₃ ^-) may decrease the N depositionvelocity by 50%. We extend this research using the CHEM-COASTmodel to demonstrate that, in a sulphur poor environment undermoderate wind speeds with HNO₃ concentrations representativeof those found in the marine boundary layer, inclusion ofheterogeneous reactions on sea spray significantly reducesmodelled NO₃ ^- deposition in the near coastal zone.     

Electroremediation: A study of the influence of buffering behavior in contaminated soils

This article presents the results of an experimental study conducted to evaluate the behavior of two types of andisol soils found in Tenerife, Canary Islands, Spain. The soils were evaluated in relation to their buffering capacity when confronted with acid and alkaline fronts generated during electroremediation treatment. The study was conducted using a cell, which established a continuous flow of distilled water through electrode chambers to remove H⁺ and OH^? generated during electrolysis. The results indicate that the soils had sufficient buffer capacity to support variations in pH independent of the maintenance of flow of solution in the electrode chambers. Although the mechanism of migration was not affected, the flow of water favored the movement of ions by diffusion monitoring of the electrolytic current allowed for a real‐time parameter to act as an indicator of the quantity of ions available in regions near the electrodes. © 2004 Wiley Periodicals, Inc.