烧结过程NO_x和SO_2形成规律及烧结料组成对NO_x排放的影响
NO_x and SO_2 Formation in the Sintering Process and Influence of Sintering Material Composition on NO_x Emissions
查看参考文献25篇
文摘
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采用烧结杯实验方法,研究了烧结过程NO_x和SO_2的形成规律,以及焦粉含量、 含水率和添加助剂对烧结过程NO_x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NO_x浓度基本相同. 烧结带产生的SO_2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SO_2,且SO_2浓度与时间的关系呈倒V形曲线. 烧结过程产生的NO_x以热力型为主,而且绝大部分为NO, NO_2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NO_x排放. |
其他语种文摘
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NO_x and SO_2 formation in the sintering process and the influence of coke powder content, moisture content and adding additives on NO_x 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 NO_x concentrations of all monitoring points below the combustion zone were basically the same. SO_2 generated in the combustion zone was adsorbed and accumulated in the sintering materials below the zone. Then, SO_2 was released by pyrolysis, and finally discharged from the outlet of sintering pot. So the significant SO_2 couldn't be detected before the burning through point, and the relationship between the SO_2 concentration and the sintering time displayed an inverted "V" curve. NO_x produced from the sintering process was mainly thermal-NO_x, and most of it was NO, the NO_2 concentration was very low. Reducing the coke powder and moisture contents, or adding sintering additives could effectively reduce NO_x emissions. |
来源
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环境科学
,2014,35(10):3669-3673 【核心库】
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DOI
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10.13227/j.hjkx.2014.10.005
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关键词
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烧结过程
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物料组成
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NO_x
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SO_2
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形成
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地址
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1.
北京航空航天大学化学与环境学院, 北京, 100191
2.
中国科学院过程工程研究所, 北京, 100190
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语种
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中文 |
文献类型
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研究性论文 |
ISSN
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0250-3301 |
学科
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行业污染、废物处理与综合利用 |
基金
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国家环境保护公益性行业科研专项
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文献收藏号
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CSCD:5244898
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