CAJ | 학술논문

选择性催化还原（SCR）系统和烟气冷却器是实现燃煤电厂节能减排的重要设备，但SCR中的氨逃逸现象对烟气冷却器的影响研究鲜有报道。本文对某电厂SCR设备后的烟气冷却器表面出现的沉积物，进行了XRD、XRF、SEM和EDS等分析研究。结果表明：沉积物的白色结晶物主要为氟硼酸铵，及其反应中间产物（氟化铵、硼酸以及氟硅酸铵），形成该结晶层的主要原因为煤中富集的氟、硼元素和SCR逃逸氨的耦合反应，该沉积物的厚度不会无限增加，但仍会影响烟气冷却器的正常运行。
선택성최화환원（SCR）계통화연기냉각기시실현연매전엄절능감배적중요설비，단SCR중적안도일현상대연기냉각기적영향연구선유보도。본문대모전엄SCR설비후적연기냉각기표면출현적침적물，진행료XRD、XRF、SEM화EDS등분석연구。결과표명：침적물적백색결정물주요위불붕산안，급기반응중간산물（불화안、붕산이급불규산안），형성해결정층적주요원인위매중부집적불、붕원소화SCR도일안적우합반응，해침적물적후도불회무한증가，단잉회영향연기냉각기적정상운행。
Two kinds of important equipmenti.e. selective catalytic reduction system (SCR) and flue gas cooler are applied in coal-fired power plant to achieve energy conservation and to reduce emission. However, few studies have been published on the influence of ammonia escaped from SCR system on flue gas cooler. In this study, the condensates deposited on the wall of the cooler at the downstream of SCR were analyzed by XRD, XRF, SEM and EDS. The results indicated that the white crystalline material in the condensates is mainly ammonium fluoroborate and some intermediates such as ammonium fluoride, boric acid and ammonium fluorosilicate. The formation of crystalline layer took place by coupling reaction between the ammonia escaped from SCR system and both fluorine element and boron element volatilized in combustion of coal. Although the deposition layer has only a limited thickness, it could be hamper directly for operation of flue gas cooler.