引用本文:马忠强,汪林,朱京海,刘翠玲,杨洪斌,等.2×300 MW机组烟塔合一方案大气环境影响分析[J].环境科学研究,2012,25(12):1416-1421.
MA Zhong-qiang,WANG Lin,ZHU Jing-hai,LIU Cui-ling,YANG Hong-bin,et al.Analysis of the Atmospheric Environmental Impact of a Stack-Cooling Tower Project for a 2×300 MW Generating Unit[J].Reserrch of Environmental Science,2012,25(12):1416-1421.]
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2×300 MW机组烟塔合一方案大气环境影响分析
马忠强,汪林,朱京海,刘翠玲,杨洪斌,等
1.大连海事大学环境科学与工程学院, 辽宁 大连116025;2.大连大学环境与化学工程学院, 辽宁 大连116622;3.辽宁省环境保护厅, 辽宁 沈阳 110031;4.中国气象局沈阳大气环境研究所, 辽宁 沈阳110016
摘要:
受机场附近160 m限高制约,辽宁某电厂需采用烟塔合一技术. 运用德国AUSTAL2000模型分析了环境风速、大气稳定度、烟气出口速度、烟气出口温度等参数与烟气抬升高度间的关系,预测了烟塔排放的大气环境影响,并且与烟囱方案的大气环境影响进行了对比分析. 结果表明,各类参数变化均会导致烟气抬升高度发生改变. 环境风速不变,稳定度从A变到F时,抬升高度明显变小,最多可降低84.2%;相同稳定度条件下,环境风速从0.1 ms增至4.4 ms时,抬升高度明显变小,最多可降低84.3%;烟气出口速度从2.5 ms增至8.0 ms,抬升高度显著增加,最多为2.4倍;烟气出口温度从20 ℃增至50 ℃时,烟气抬升高度显著增加,最多为3.3倍. 综合经济及环保因素,该项目烟塔高度取130 m较适宜. 相比210 m烟囱方案,烟塔方案不仅满足机场限空要求,并且污染物年均及日均最大地面浓度均较低.
关键词:  烟塔合一  烟气抬升高度  大气环境影响
DOI:
分类号:
基金项目:国家自然科学基金项目(40801228)
Analysis of the Atmospheric Environmental Impact of a Stack-Cooling Tower Project for a 2×300 MW Generating Unit
MA Zhong-qiang,WANG Lin,ZHU Jing-hai,LIU Cui-ling,YANG Hong-bin,et al
1.College of Environmental Science and Engineering, Dalian Maritime University, Dalian 116025, China;2.College of Environmental and Chemical Engineering, Dalian University, Dalian 116622, China;3.Department of Environmental Protection of Liaoning Province, Shenyang 110033, China;4.Institute of Atmospheric Environment, CMA, Shenyang, Shenyang 110016, China
Abstract:
Stack-in cooling tower technology had to be adopted by a power plant in Liaoning Province due to the airport clearance limit of 160 m. The AUSTAL2000 model from Germany was used to calculate the relationship between the rise-height of the smoke and environmental parameters including wind velocity, atmospheric stability, outlet velocity and outlet temperature. The influence of different tower heights on the atmospheric environment was predicted, and a comparative analysis of the influences from the stack-cooling tower and chimney scheme was conducted. The results showed that the rise-height could be affected by environmental parameters. When the wind velocity was kept constant and the stability decreased from A to F, the rise-height significantly decreased by a maximum of 84.2%. When keeping the conditions stable and increasing the wind velocity from 0.1ms to 4.4ms, the rise-height decreased significantly by a maximum of 84.3%. When the outlet velocity increased from 2.5 ms to 8.0 ms, the rise-height increased significantly by a maximum of 2.4 times. When the outlet temperature increased from 20 ℃ to 50 ℃, the rise-height increased by a maximum of 3.3 times. Taking both economic and environmental requirements into consideration, a height of 130 m was suggested as the appropriate design of the tower, since this height of stack-cooling tower scheme could not only meet the airport clearance limit requirement, but could also maximally decrease the annual and daily concentrations on the ground.
Key words:  stack-cooling tower  rise-height  atmospheric environmental impact