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分别以单煤、配煤为原料,实验室炼焦炉模拟制备焦炭,对炼焦过程中产生排放的多环芳烃(PAHs)进行收集、检测,研究结焦温度、结焦过程和煤质的黏结性、灰分、水分对炼焦过程中多环芳烃产生排放的影响。结果表明:炼焦温度为700~920℃时,多环芳烃产生排放量最高;结焦的特点、煤焦油以及热解产物等因素对炼焦初期多环芳烃的产生排放量影响较大,且低环多环芳烃产生排放较多;多环芳烃产生排放量随煤的黏结性和灰分的增加而增大,随水分的增加则先减少后增大。
Separately using single coal and coal blending as raw materials, the laboratory coke oven simulates the preparation of coke to collect and test the PAHs released during the coking process, and studies the coke temperature, coking process and cohesiveness of coal, ash , Moisture on the coking process PAHs emissions. The results showed that the emissions of polycyclic aromatic hydrocarbons were the highest when coking temperature was 700-920 ℃. The characteristics of coking, coal tar and pyrolysis products had a significant impact on the PAHs emissions during the initial stage of coking, PAHs generated more emissions; emissions of PAHs increased with the cohesiveness and ash content of coal, but decreased and then increased with the increase of water content.