兰州城市大气污染和可能的技术控制措施

Air Pollution and Potential Control Schemes in Lanzhou

利用大气污染源和环境监测等资料 ,计算分析了兰州市区大气污染及其治理现状。结果表明 ,在兰州市区 ,燃煤占全部能源的 71 % ;SO2 年排放量为 5 96万t,烟尘为 6 54万t;汽车尾气已成为主要大气污染源之一。市区SO2 浓度日均值在采暖期超标 ,而TSP一年四季都超标。指出采用以集中供热、煤气、型煤和控制汽车尾气为主要措施 ,兼顾绿化和太阳能利用 ,制定市区大气污染治理方案比较合理。

By using the existing data on air pollution sources and air quality monitoring,the situationof air pollution and its control in Lanzhou is analyzed.It is shown that coal stands 71% of the total energy resources.The annual discharge of SO 2 and soot is respectively 59\^6kt and 65\^4kt.Moreover,tail gas has become one of the main air pollution sources.According to the data analysis during the heating period,the daily mean value of SO 2 concentration in the city exceeds the second grade of the Ambient Air Quality Standard of China,and that of TSP concentration also stays high over the Standard throughout the year.Therefore,centralized heating system,gas and briquette schemes,and tail gas control are taken as the major feasible measures in planning the urban air pollution control projects.At the same time,planting trees and solar energy should also be taken into consideration for the air pollution control schemes.