Influencing Factors of NO Removal from Sintering Flue Gas Based on Microwave Treatment
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摘要:
以实验室模拟的烧结烟气为研究对象，研究微波加热温度、微波处理时间、活性炭用量、烟气流量以及气体浓度等因素对微波脱硝效果的影响。试验结果表明，增大微波加热温度和提高活性炭的加入量可显著提高微波脱硝效率，微波加热温度为700℃和活性炭用量为30 g/L时，脱硝效率分别为57.6%和70.02%；微波加热时间从3 min增加到15 min，脱硝效率由55.45%增大到62.8%，影响不明显；烟气流速为0.3 L/min时，可获得71.9%的脱硝效率，并随着烟气流速增大表现出对脱硝效果的不利影响；受活性炭吸附的影响，随着烟气中NO浓度增大，NO脱除效率逐渐降低，NO浓度为200 ×10-6时，脱硝效率达到最大值80.25%。
Abstract:Taking sintering flue gas simulated in the laboratory as the research object, the effects of microwave heating temperature, microwave treatment time, modified activated carbon dosage, flue gas flow rate and gas concentration on microwave denitration were studied. The test results showed that increasing the microwave heating temperature and increasing the amount of activated carbon can significantly improve the microwave denitration efficiency. When the microwave heating temperature is 700℃ and the activated carbon dosage is 30 g/L, the denitration efficiency is 57.6% and 70.02%, respectively. When the microwave heating time is increased from 3min to 15min, the denitration efficiency is increased from 55.45% to 62.8%, but the effect is not obvious. When the flue gas flow rate is 0.3 L/min, 71.9% denitration efficiency can be obtained, and detrimental effects on denitration is shown as the flue gas flow rate increases. Being affected by the adsorption of activated carbon, as the NO concentration in the flue gas increases, the NO removal efficiency gradually decreases. When the NO concentration is 200 ×10-6, the denitration efficiency reaches the maximum of 80.25%.
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Key words:
- Microwave /
- Activated carbon /
- Denitration /
- Sintering flue gas
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