| 烧结过程NOx和SO2形成规律及烧结料组成对NOx排放的影响 |
| 摘要点击 2157 全文点击 1083 投稿时间：2014-03-24 修订日期：2014-05-16 |
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| 中文关键词 烧结过程 物料组成 NOx SO2 形成 |
| 英文关键词 sintering process material composition NOx SO2 formation |
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| 中文摘要 |
| 采用烧结杯实验方法，研究了烧结过程NOx和SO2的形成规律，以及焦粉含量、含水率和添加助剂对烧结过程NOx排放的影响. 结果表明，烧结启动后，烧结带自上而下逐层推进，烧结带以下各断面NOx浓度基本相同. 烧结带产生的SO2先被待烧结料吸附蓄积，再被热解析出，最后从底部排出，因此只在烧结最后阶段出口能检测到较高浓度的SO2，且SO2浓度与时间的关系呈倒V形曲线. 烧结过程产生的NOx以热力型为主，而且绝大部分为NO，NO2浓度非常低. 降低焦粉含量和含水率，或添加烧结助剂均有助于降低NOx排放. |
| 英文摘要 |
| NOx and SO2 formation in the sintering process and the influence of coke powder content, moisture content and adding additives on NOx emissions were investigated by the sintering pot experimental method. The results showed that the combustion zone moved downward along the sintering pot after the sintering started. The NOx concentrations of all monitoring points below the combustion zone were basically the same. SO2 generated in the combustion zone was adsorbed and accumulated in the sintering materials below the zone. Then, SO2 was released by pyrolysis, and finally discharged from the outlet of sintering pot. So the significant SO2 couldnt be detected before the burning through point, and the relationship between the SO2 concentration and the sintering time displayed an inverted "V" curve. NOx produced from the sintering process was mainly thermal-NOx, and most of it was NO, the NO2 concentration was very low. Reducing the coke powder and moisture contents, or adding sintering additives could effectively reduce NOx emissions. |
