本文關(guān)鍵詞： 過飽和濕煙氣 顆粒物 凝膜 異質(zhì)核化 脫除效率　出處：《環(huán)境污染與防治》2017年11期 　論文類型：期刊論文

【摘要】：為了探究降溫凝膜對顆粒物脫除特性的影響,采用電稱低壓沖擊器對模擬煙氣(過飽和濕煙氣)在靜電除塵器前后的顆粒物進(jìn)行在線監(jiān)測和分析,得到顆粒物濃度及粒徑分布特征,研究了不同降溫幅度下凝結(jié)相變對顆粒物脫除特性的影響,并著重關(guān)注細(xì)顆粒物。研究結(jié)果表明:降溫幅度增大,細(xì)顆粒物核化凝結(jié)長大,發(fā)生凝并、團(tuán)聚,粒徑明顯變大;降溫凝膜后,靜電除塵器對細(xì)顆粒物脫除效果明顯增強(qiáng);降溫5℃與降溫0℃時對比,PM10的質(zhì)量脫除效率提高約30百分點(diǎn)。降溫幅度為4℃時,PM2.5的質(zhì)量總脫除效率和數(shù)量總脫除效率分別已達(dá)到73.09%、67.44%�？紤]到降溫成本,實際應(yīng)用中,降溫幅度選擇4℃為宜。
[Abstract]:In order to investigate the effect of cooling and condensing film on the removal characteristics of particulate matter, the particles of simulated flue gas (supersaturated wet flue gas) before and after electrostatic precipitator were monitored and analyzed by using a low pressure impact device. The characteristics of particle concentration and particle size distribution were obtained. The effects of condensation phase transition on the removal characteristics of fine particles were studied under different cooling ranges, and the attention was focused on fine particles. The results showed that the nucleation and condensation growth of fine particles increased with the increase of cooling range. After condensation and agglomeration, the particle size is obviously larger, and the effect of electrostatic precipitator on the removal of fine particles is obviously enhanced after cooling and condensing film. The mass removal efficiency of PM10 is increased by about 30 percentage points compared with that at 5 鈩，

本文編號：1515568