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首页> 美国卫生研究院文献>Royal Society Open Science >Emission characteristics and vapour/particulate phase distributions of PCDD/F in a hazardous waste incinerator under transient conditions
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Emission characteristics and vapour/particulate phase distributions of PCDD/F in a hazardous waste incinerator under transient conditions

机译：瞬态条件下危险废物焚烧炉中PCDD / F的排放特性和蒸气/颗粒相分布

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摘要

Polychlorinated dibenzo-p-dioxin and polychlorinated dibenzofuran (PCDD/F) emission characteristics and vapour/particulate phase partitions under three continued operation conditions, i.e. shut-down, start-up and after start-up, were investigated by sampling stack gas. The results indicated that the PCDD/F emission levels were 0.40–18.03 ng I-TEQ Nm−3, much higher than the annual monitoring level (0.016 ng I-TEQ Nm−3). Additionally, the PCDD/F emission levels in start-up were higher than the other two conditions. Furthermore, the PCDD/F congener profiles differed markedly between shut-down and start-up, and the chlorination degree of PCDD/F increased in shut-down and decreased evidently in start-up. Moreover, PCDD/F vapour/particulate phase distributions varied significantly under three transient conditions. The PCDD/F vapour phase proportion decreased as the shut-down process continued, then increased as the start-up process proceeded, finally more than 98% of the PCDD/F congeners were distributed in the vapour phase after start-up. The correlations between log(Cv/Cs) versus log pL0 of each PCDD/F congener in stack gas were disorganized in shut-down, and trend to a linear distribution after start-up. Besides, polychlorinated biphenyl emissions show behaviour similar to that of PCDD/F, and the lower chlorinated congeners have a stronger relationship with 2,3,7,8-PCDD/Fs, such as M1CB and D2CB.
机译：通过对烟道气进行采样，研究了三种连续运行条件下的多氯二苯并对二恶英和多氯二苯并呋喃（PCDD / F）的排放特征以及蒸气/颗粒相分配。结果表明，PCDD / F排放水平为0.40–18.03 ng I-TEQ Nm -3 ，远高于年度监测水平（0.016 ng I-TEQ Nm -3 sup>）。此外，启动时的PCDD / F排放水平高于其他两个条件。此外，在关闭和启动之间，PCDD / F同类物的分布显着不同，并且关闭时PCDD / F的氯化度增加，而在启动时则明显降低。此外，在三种瞬时条件下，PCDD / F蒸气/颗粒的相分布有很大变化。随着关闭过程的继续，PCDD / F气相比例降低，而随着启动过程的进行，PCDD / F气相比例逐渐增加，最终启动后，气相中有98％以上的PCDD / F同源物分布在气相中。 log（Cv / Cs）与 log p L 0 关闭时，烟囱气中的每个PCDD / F同源物都杂乱无章，启动后趋向于线性分布。此外，多氯联苯的排放表现出与PCDD / F相似的行为，较低的氯化同类物与2,3,7,8-PCDD / Fs（如M1CB和D2CB）具有更强的关系。

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