| 摘要: |
| 我国重点区域大气污染防治取得积极成效的同时,天山北坡城市群已经成为新的重污染源区域。乌鲁木齐市大气重点源区域分布和自动监测(CEMS)数据分析发现:(1)乌鲁木齐市重点源废气污染物排放量对工业源的贡献率高,SO2、NOx、颗粒物分别占区域工业源排放总量的91.2%、72.2%、6.5%；(2)秋冬季重点源主要污染物排放量有所降低,但降低比例不大,SO2、NOx、颗粒物分别下降3.7%、3.4%、22.9%,与大气环境容量系数在秋冬季下降50%左右的趋势不匹配,米东区中南部等重点区域污染物下降比例更低,甚至增加,成为秋冬季高污染频发的一个重要影响因素；(3)从2021-2022年秋冬季三次橙色重污染预警过程来看,大多数企业排放量有所降低,但很难实现全社会排放总量减排20%,特别是SO2；(4)乌鲁木齐市重点源废气污染物排放呈现较明显的行业特征,电力行业秋冬季排放量有所上升,非电行业中大型企业对排放量降低贡献大,但区域分布不均匀。建议进一步聚焦加强重点源管控,推进企业污染深度治理和日常管控,加大秋冬季减排力度。 |
| 关键词: 乌鲁木齐 重点源 大气污染 CMES 秋冬季重污染应急 |
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| Study on Emission Characteristics of Major Air Source Pollutants in Urumqi |
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| Abstract: |
| While the prevention and control of air pollution in key regions in China has achieved positive results, the urban agglomeration on the northern slope of Tianshan Mountain has become a new heavy pollution source area. The analysis of regional distribution and automatic monitoring (CEMS) data of key atmospheric sources in Urumqi shows that: (1) the contribution rate of emissions of waste gas pollutants from key sources in Urumqi to industrial sources is high, with SO2, NOx and particulate matter accounting for 91.2%, 72.2% and 6.5% of the total regional industrial source emissions respectively; (2) In autumn and winter, the emissions of major pollutants from key sources decreased, but the reduction ratio was not large. SO2, NOx and particulate matter decreased by 3.7%, 3.4% and 22.9% respectively, which did not match the trend that the atmospheric environmental capacity coefficient decreased by about 50% in autumn and winter. The decline ratio of pollutants in key areas such as the central and southern parts of Midong District was lower, or even increased, becoming an important factor for the frequent occurrence of high pollution in autumn and winter; (3) From the three orange heavy pollution warning processes in the autumn and winter of 2021-2022, the emissions of most enterprises have decreased, but it is difficult to reduce the total emissions of the whole society by 20%, especially SO2; (4) The emission of waste gas pollutants from key sources in Urumqi shows obvious industrial characteristics. The emission of the electric power industry has increased in autumn and winter. Large and medium-sized enterprises in the non electric industry have made great contributions to the reduction of emissions, but the regional distribution is uneven. It is suggested to further focus on strengthening the control of key sources, promote the in-depth treatment and daily control of enterprise pollution, and increase the emission reduction in autumn and winter. |
| Key words: Urumqi Key sources Air pollution CMES Heavy pollution emergency in autumn and winter |
