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Maximizing Sinter Plant Operating Flexibility Through Emissions Trading and Air Modeling

机译：通过排放交易和空气模型最大化烧结厂的运营灵活性

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摘要

This paper provides details on the dispersion modeling analysis performed to demonstrate air quality impacts associated with an emission trading scheme for a sintering operation in Youngstown, Ohio. The emission trade was proposed to allow the sinter plant to expand its current allowable sulfur dioxide (SO_2) emissions while being offset with SO_2 emissions from boilers at a nearby shutdown steel mill. While the emission trade itself was feasible and the emissions required for the offset were available (the boiler shutdown and their subsequent SO_2 emission credits were never claimed, banked, or used elsewhere), the second criterion for determining compliance was a demonstration of minimal air quality impact. The air analysis combined the increased ambient SO_2 concentrations of the relaxed sinter plant emissions with the offsetting air quality of the shutdown boilers to yield the "net" air quality impacts. To test this net air impact, dispersion modeling was performed treating the sinter plant SO_2 emissions as positive and the shutdown boiler SO_2 emissions as negative. The results of the modeling indicated that the ambient air concentrations due to the proposed emissions increase will be offset by the nearby boiler emissions to levels acceptable under EPA's offset policy Level II significant impact concentrations. Therefore, the dispersion modeling demonstrated that the emission trading scheme would not result in significant air quality impacts and maximum operating flexibility was provided to the sintering facility.
机译：本文提供了有关色散模型分析的详细信息，以证明与俄亥俄州扬斯敦市一家烧结厂的排放交易计划相关的空气质量影响。提议进行排放交易，以允许烧结厂扩大其当前允许的二氧化硫（SO_2）排放量，同时用附近停工的钢厂锅炉的SO_2排放量来抵消。尽管排放交易本身是可行的，并且抵消所需的排放是可用的（锅炉停工及其随后的SO_2排放信用额从未被要求，存储或用于其他地方），但确定合规性的第二个标准是证明最低空气质量影响。空气分析将松散的烧结厂排放物的环境SO_2浓度增加与停机锅炉的抵消空气质量相结合，以产生“净”空气质量影响。为了测试此净空气影响，执行了分散模型，将烧结厂的SO_2排放量定为正，而停机锅炉的SO_2排放量定为负。建模结果表明，由于提议的排放量增加而导致的周围空气浓度将被附近的锅炉排放量抵消至EPA抵消政策II级显着影响浓度可接受的水平。因此，弥散模型表明，排放权交易方案不会对空气质量产生重大影响，并且为烧结设备提供了最大的操作灵活性。

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