气象条件对烟囱污染物影响的模拟研究

Numerical simulation on the effects of meteorological conditions on chimney pollutants

利用ISC3模型模拟了某电厂不同高度烟囱在不同风速、不同稳定度情况下SO2的最大落地浓度和落地距离。结果表明:在烟囱高度不变的情况下,稳定度不变,如果风速逐渐加大,则SO2最大落地浓度变小,且最大落地距离亦变小;烟囱高度不变且风速不变情况下,稳定度由稳定趋向于不稳定,则SO2最大浓度变小且最大落地距离变小;在风速和稳定度不变的条件下,随着烟囱高度的减小,SO2最大浓度变大且最大落地距离不变;在建烟囱最高高度不宜超过300 m。

Under the conditions of different chimney heights, different wind speeds and different atmospheric stabilities, the ground maximum concentration and its distance of SO2 were simulated by ISC3 model. Numerical simulation shows that under the conditions of constant chimney heights and constant atmospheric stabilities, the ground maximum concentration and its distance of SO2 decrease with the increase of wind speed. If chimney heights and wind speeds are constant, the ground maximum concentration and its distance of SO2 become smaller when atmospheric instability increases. Under the conditions of changeless wind speed and stability, the ground maximum concentration of SO2 increases and the ground maximum distance of SO2 keeps unchangeable with the decrease of chimney height. The chimney height should be built less than 300 m.