西安市燃煤中铅的排放量及其环境效应

Lead Emission Amount from Coal Combustion and Its Environment Effect in Xi’an City

为了研究燃煤过程中铅的排放量及其环境效应 ,对西安市燃煤电厂的原煤、底灰、飞灰的含铅量 ,采暖期燃煤锅炉的原煤和炉渣的含铅量 ,采暖期和非采暖期降尘的含铅量等进行了分析和测算 .结果表明 :燃烧 1t含铅量为 30 g左右的煤 ,排放到大气中的铅为 2 0g左右 .燃煤中铅的排放率为 66%左右 .西安市及邻区每年工农业和民用燃煤 1 0 0 0万t左右 ,主要为渭北石炭 二叠系煤 ,含铅量为 30g/t左右 ,其每年排放到大气中的铅为 2 0

For study the lead emission amount from coal combustion and its environment effect, the lead content of coal, ash and cinder of power station and coal fired boiler, the lead content of dusts in the period of heating time and the non heating time in Xi’an City were studied in this paper. The results show that amount of lead emission from 1 ton coal combustion, which lead content in coal was 30g, was 20g in atmosphere. The rate of lead emission of coal combustion was about 66%. About 10 million tons of coal was straight burning every year in Xi'an City and suburb, those coal mainly come from Permo Carboniferous coal in Weibei coal mine, Shaanxi, their average lead content was 30 mg/kg. So the total lead emission from coal combustion to atmosphere was about 200t annually in Xi'an City.