煤焦油生产沥青中烟气的治理

Treatment of Flue Gas in Coal Tar Asphalt Production

煤沥青是焦炭生产的副产品煤焦油经过蒸馏得到的产品。蒸馏过程中产生大量的沥青烟气,含有多种环芳香烃,对人体有致癌作用的苯并(a)芘大量存在。沥青烟的挥发物排放到大气中,会造成环境污染。采取文丘里装置和用洗油吸收对沥青烟气进行治理,能够对沥青生产逸散产生的烟气进行有效地捕集,可去除沥青烟中90%以上的污染物,使沥青烟的排放能够达到环保指标。

Coal tar pitch is the product that is obtained by distillation of coal tar as by-product of coke production. A lot of asphalt flue gas can be produced in distillation process, the asphalt flue gas contains a variety of aromatic hydrocarbon, and there is carcinogenic carcinogenic benzo （a） pyrene in the aromatic hydrocarbon. Emission of asphalt smoke into the atmosphere will cause environmental pollution. In this paper, the Venturi apparatus and wash oil were used to absorb asphalt smoke, the smoke in the asphalt production was effectively trapped, more than 90% of pollutants in the asphalt smoke can be removed, so the asphalt smoke emission can meet environmental protection index.