SCR脫硝分區(qū)噴氨影響因子研究及優(yōu)化

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摘  要：近年來，針對(duì)SCR脫硝系統(tǒng)過量噴氨和氨逃逸等問題，分區(qū)噴氨控制技術(shù)開始在燃煤電廠進(jìn)行應(yīng)用。該文采用數(shù)值模擬方法（CFD）對(duì)某600 MW機(jī)組的SCR分區(qū)噴氨系統(tǒng)進(jìn)行流場(chǎng)模擬，并提出優(yōu)化方案，優(yōu)化后催化劑入口氨氮比和噴氨分區(qū)對(duì)應(yīng)性顯著改善，最后分析不同負(fù)荷工況對(duì)流場(chǎng)的影響。

關(guān)鍵詞：CFD；分區(qū)噴氨；流場(chǎng)優(yōu)化；分區(qū)影響因子；選擇性催化還原

中圖分類號(hào)：X773       文獻(xiàn)標(biāo)志碼：A          文章編號(hào)：2095-2945（2024）14-0120-04

Abstract： In recent years， aiming at issues such as excessive ammonia injection and ammonia escape in SCR denitrification systems， partitioned ammonia injection control technology has begun to be applied in coal-fired power plants. This article uses a numerical simulation method， Computational Fluid Dynamics （CFD）， to simulate the flow field of the SCR zoned ammonia injection system of a 600 MW unit， and proposes an optimization plan. After optimization， the catalyst inlet ammonia nitrogen ratio and the correspondence between the ammonia injection zones are significantly improved. Finally， the impact of different load conditions on the flow field was analyzed.

Keywords： CFD; zoned ammonia injection; flow field optimization; zonedimpact factor; selective catalytic reduction （SCR）

選擇性催化還原（SCR）煙氣脫硝技術(shù)作為一種主要的高效NOx控制技術(shù)，廣泛應(yīng)用于國(guó)內(nèi)燃煤發(fā)電機(jī)組，使出口NOx濃度達(dá)到超低排放要求[1-3]。（剩余3605字）