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首页> 外文会议>Symposium on Sulfide Smelting 2002, Feb 17-21, 2002, Seattle, Washington >BUDEL ZINK SETS A NEW STANDARD FOR NO_x REDUCTION IN AN ACID PLANT
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BUDEL ZINK SETS A NEW STANDARD FOR NO_x REDUCTION IN AN ACID PLANT

机译：BUDEL ZINK设定了酸性工厂NO_x还原的新标准

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摘要

NO_x is a growing concern for acid plant operators due to recent legislation reducing the allowable stack limits, as well as continually more stringent requirements for product acid quality. NO_x also causes a major problem during maintenance as NO_x rich acid residues fume following exposure to moisture in the air. Until recently, the solution for NO_x related issues was to treat the symptom, rather than the cause. NO_x in product acid was treated using chemicals and the NO_x in the plant stack was generally left untreated. As part of an environmentally driven change in concentrates, Budel Zink installed the first gas phase NO_x destruction process to be incorporated into a commercial scale acid plant. Nitrogen oxides contained in the process gas are reduced selectively with ammonia over a catalyst to form nitrogen and water. As a result, the NO_x reduction is in agreement with the permit requirements.
机译：由于最近的立法降低了允许的烟囱限制，以及对产品酸质量的要求越来越严格，因此NO_x对于制酸厂的运营商而言正日益引起关注。在暴露于空气中的水分之后，富NO_x的酸性残留物会冒烟，因此NO_x还会在维护过程中引起重大问题。直到最近，解决NO_x相关问题的方法仍是治疗症状，而不是原因。产物酸中的NO_x使用化学物质处理，而工厂烟囱中的NO_x通常不做处理。作为环境驱动的精矿变化的一部分，Budel Zink安装了第一个气相NO_x销毁工艺，该工艺将被并入商业规模的酸工厂。在催化剂上用氨选择性地将工艺气体中所含的氮氧化物还原，以形成氮和水。结果，NO_x的减少与许可要求一致。

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