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发明公开
CN104001415A 一种减少烧结烟气中SO2排放的方法 有权

一种减少烧结烟气中SO2排放的方法
摘要：
本发明涉及一种减少烧结烟气中SO2排放的方法，包括如下步骤：(1)在烧结混合料中定层添加含氨化合物；(2)在烧结过程中产生的SO2在抽风作用下被烧结混合料中的过湿带吸收；(3)烧结过程继续进行，含氨化合物在高温作用下分解出氨气；(4)步骤(3)中所述氨气在抽风作用下被烧结混合料中的过湿带吸收；(5)SO2和氨气在烧结过湿带中逐步反应生成硫酸铵；(6)烧结过程继续进行，过湿带开始消失，生成的硫酸铵呈晶体形式进入烟气排出。通过本发明，烧结烟气SO2减排率可达到80％以上。
摘要（英）：

The invention relates to a method for reducing the emission of SO2 in sintered smoke. The method comprises the following steps: (1) adding an ammonia-containing compound into a sintered mixed material; (2) absorbing the SO2 generated in the sintering process by an excessive moistening belt of the sintered mixed material under an air pumping effect; (3) continually carrying out the sintering process and decomposing ammonia gas from the ammonia-containing compound under a high-temperature effect; (4) absorbing the ammonia gas in the step (3) by the excessive moistening belt of the sintered mixed material under an air pumping effect; (5) enabling the SO2 and the ammonia gas to gradually react in the sintering excessive moistening belt to generate ammonium sulfate; and (6) continually carrying out the sintering process and enabling the excessive moistening belt to start to disappear. The generated ammonium sulfate can enter smoke in a crystal form to be exhausted. According to the method provided by the invention, the emission reduction rate of the sintered smoke SO2 can be up to more than 80%.

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