CAJ | 학술논문

利用携带流脱硝试验装置，研究了反应温度(Tr)、烟气组分(O2、CO、水蒸气)、飞灰以及碱金属添加剂等对选择性非催化还原(selective non-catalytic reduction，SNCR)脱硝效果的影响，探讨了NO还原机理。结果表明：随着反应温度的升高，SNCR脱硝效率呈现先增加后降低的趋势。随着烟气中氧含量的增加，SNCR脱硝效率呈现先快速增加后逐渐降低的趋势，当氧含量为2%时，脱硝效率取得最大值84.6%。烟气中CO存在对SNCR脱硝具有一定的抑制作用。随着烟气中水蒸气含量(0~15%)的增加，脱硝效率呈现先增加后减少并逐渐趋于稳定的趋势，4%水蒸气条件下 SNCR脱硝效率达到最大值，约为73.5%。碱金属(钠、钾)添加剂对SNCR脱硝具有显著的促进作用，燃煤飞灰对SNCR脱硝效率则具有一定的抑制作用，添加125μmol/mol Na2CO3的SNCR脱硝效率可达84.9%，在水蒸气、CO、Na2CO3和飞灰的耦合作用下，仍可获得72.1%的脱硝效率。
이용휴대류탈초시험장치，연구료반응온도(Tr)、연기조분(O2、CO、수증기)、비회이급감금속첨가제등대선택성비최화환원(selective non-catalytic reduction，SNCR)탈초효과적영향，탐토료NO환원궤리。결과표명：수착반응온도적승고，SNCR탈초효솔정현선증가후강저적추세。수착연기중양함량적증가，SNCR탈초효솔정현선쾌속증가후축점강저적추세，당양함량위2%시，탈초효솔취득최대치84.6%。연기중CO존재대SNCR탈초구유일정적억제작용。수착연기중수증기함량(0~15%)적증가，탈초효솔정현선증가후감소병축점추우은정적추세，4%수증기조건하 SNCR탈초효솔체도최대치，약위73.5%。감금속(납、갑)첨가제대SNCR탈초구유현저적촉진작용，연매비회대SNCR탈초효솔칙구유일정적억제작용，첨가125μmol/mol Na2CO3적SNCR탈초효솔가체84.9%，재수증기、CO、Na2CO3화비회적우합작용하，잉가획득72.1%적탈초효솔。
The effects of reaction temperature, flue gas components (O2, CO, water vapor), fly ash and alkali metal additives on NO reduction during the selective non-catalytic reduction (SNCR) process were investigated in an entrained flow reactor, and NO reduction mechanism was also analyzed. The results indicate that: NO removal efficiency of SNCR shows a trend of increase first and decrease later with increasing reaction temperature. NO removal efficiency shows a pattern of rapid increase first and decrease later with increasing oxygen content, and the best NO removal efficiency of 84.6%is obtained when 2%oxygen was used. The additive of carbon monoxide has a certain adverse effect on NO reduction in the SNCR process. NO removal efficiency shows a tendency of increase first, decrease later and being stable gradually with increasing water vapor (0~15%) in the flue gas, and the best NO removal efficiency of 73.5%is obtained at 4%water vapor. Alkali metal (K, Na) additives have significant promoting effects on NO reduction, but the fly ash has a certain adverse effect on NO reduction in the SNCR process. NO removal efficiency through SNCR can reach 84.9% while adding 125μmol/mol Na2CO3 in the flue gas. NO removal efficiency of SNCR still reaches 72.1% through the coupling effect of water vapor, CO, Na2CO3 and fly ash.