Experiment Study on NO Reduction by Reburning of Waste Tire

Procedia environmental sciences Pub Date : 2013-01-01 DOI:10.1016/j.proenv.2013.04.047

Yaxin Su, Liming Ren, Wenyi Deng

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引用次数: 10

Abstract

Waste tire powder was used to reduce NO emission by reburning and burnout in a two-stage furnace with simulated flue gas. Ceramic tubes were used as the flow reactor. The reburning temperature was 1150 °C and burnout temperature was 1250 °C respectively. The simulated flue gas consisted 16.8% vol. CO2, 1.95% vol. O2, and 0.05% and 0.08% vol. NO in a helium base. 4 kinds of ashes were used to abate the reburning intermediate products, HCN and NH3 in order to improve the final NO reduction efficiency after burnout. Resutls showed that waste tire was very good reburning fuel. More than 95% NO reduction efficiency was achieved after reburning of waste tire when the stoichiometric ratio for reburning, SR2, was 0.9. When waste tire powder was mixed with lignite ash collected by baghouse at power plant and used as reburning fuel, the final NO reduction efficiency after reburning and burnout was as high as 86%, which was very close to that of natural gas. Further test showed that lignite ash could effectively reduce HCN and NH3 during reburning. The present research demonstrated that waste tire is a very effective reburning fuel.

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废轮胎再燃烧减少NO的实验研究

利用废轮胎粉在模拟烟气两段式炉中进行再燃烧和燃尽，降低NO排放。流动反应器采用陶瓷管。再燃温度为1150℃，燃尽温度为1250℃。模拟烟气中含有16.8%的CO2, 1.95%的O2, 0.05%和0.08%的NO。采用4种灰对再燃中间产物、HCN和NH3进行减灰，以提高燃尽后的最终NO还原效率。结果表明，废轮胎是很好的再燃燃料。当再燃化学计量比SR2为0.9时，废轮胎再燃后的NO还原效率可达95%以上。将废轮胎粉与电厂袋房收集的褐煤灰混合作为再燃燃料，再燃和燃尽后的最终NO还原效率高达86%，与天然气非常接近。进一步试验表明，褐煤灰在再燃烧过程中能有效降低HCN和NH3。研究表明，废轮胎是一种非常有效的再燃燃料。

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Procedia environmental sciences

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