SCR脫硝低負(fù)荷投運(yùn)煙氣調(diào)溫旁路改造設(shè)計(jì)

SCR脫硝低負(fù)荷投運(yùn)煙氣調(diào)溫旁路改造設(shè)計(jì)摘要：燃煤電廠低負(fù)荷運(yùn)行時(shí)SCR脫硝裝置入口煙溫常達(dá)不到要求，某些電廠采納旁路提溫方法予以解決，卻消失調(diào)溫旁路提溫效果欠佳和煙溫偏差較大的問題。以A電廠某330MW機(jī)組為例，在現(xiàn)場勘察基礎(chǔ)上采納數(shù)值模擬方法，找出問題所在：（1）旁路煙道結(jié)構(gòu)不合理，未考慮原煙道結(jié)構(gòu)缺陷；（2）旁路煙道未設(shè)置導(dǎo)流元件；（3）旁路接入位置不合理；（4）旁路接入煙道深度不足。在總結(jié)脫硝調(diào)溫旁路煙道設(shè)計(jì)和運(yùn)行要點(diǎn)基礎(chǔ)上，采納數(shù)值模擬手段對B電廠某330MW機(jī)組類似改造進(jìn)行了優(yōu)化設(shè)計(jì)，并開呈現(xiàn)場試驗(yàn)，對煙氣提溫效果進(jìn)行評(píng)估。結(jié)果表明：B電廠煙氣旁路提溫改造效果顯著且煙溫偏差較小。<imgsrc=“/UploadFiles/2020001/20209/Env/202009121754508409.jpg”alt=““width=“586”height=“485”/<imgsrc=“/UploadFiles/2020001/20209/Env/202009121754511279.jpg”alt=““width=“375”height=“561”/<imgsrc=“/UploadFiles/2020001/20209/Env/202009121754516187.jpg”alt=““width=“303”height=“491”/<imgsrc=“/UploadFiles/2020001/20209/Env/202009121754519048.jpg”alt=““width=“305”height=“512”/<imgsrc=“/UploadFiles/2020001/20209/Env/202009121754519947.jpg”alt=““width=“291”height=“274”/<imgsrc=“/UploadFiles/2020001/20209/Env/202009121754514816.jpg”alt=““width=“308”height=“397”/<imgsrc=“/UploadFiles/2020001/20209/Env/202009121754516955.jpg”alt=““width=“296”height=“392”/<imgsrc=“/UploadFiles/2020001/20209/Env/202009121754520174.jpg”alt=““width=“306”height=“451”/<imgsrc=“/UploadFiles/2020001/20209/Env/202009121754525595.jpg”alt=““width=“280”height=“333”/<imgsrc=“/UploadFiles/2020001/20209/Env/202009121754522333.jpg”alt=““width=“299”height=“530”/<imgsrc=“/UploadFiles/2020001/20209/Env/202009121754527289.jpg”alt=““width=“288”height=“251”/<imgsrc=“/UploadFiles/2020001/20209/Env/202009121754521978.jpg”alt=““width=“301”height=“414”/<imgsrc=“/UploadFi