燃煤电厂湿法脱硫对细颗粒物的脱除特性

发布时间：2018-04-06 22:06

  本文选题：燃煤锅炉　切入点：PM.　出处：《环境科学研究》2017年05期

【摘要】：应用DGI承重撞击器对四台燃煤机组湿法脱硫前、后细颗粒物进行采集,分析细颗粒物的粒径分布、元素组成以及脱硫系统的脱除效率.结果表明:脱硫前细颗粒物粒径峰值出现在0.20~0.40μm处,脱硫后峰值出现在0.20~0.30μm处.经过湿法脱硫系统后ρ(PM_(2.5))、ρ(PM_1)、ρ(PM_(0.5))、ρ(PM_(0.2))出现不同程度的增长,平均增长率分别为13.28%、19.57%、28.79%、33.51%.分粒径颗粒物中ρ(Si)、ρ(Al)在脱硫前、后均随着颗粒物粒径的减小呈递减趋势,并且脱硫后ρ(Si)、ρ(Al)均有不同程度的降低,ρ(Fe)随颗粒物粒径的减小呈增加趋势,表现出一定的富集特性;湿法脱硫后Ca在PM_1中的质量浓度出现明显的增长,ρ(Ca)由18.86~51.47μg/m~3增至41.87~84.83μg/m~3.Si、Al是PM_(2.5)中的主要元素,经过湿法脱硫后ρ(Si)、ρ(Al)由59%~72%降至43%~59%;而Ca在PM_(2.5)中表现出相反的变化趋势,ρ(Ca)由8%~13%升至17%~26%.
[Abstract]:The particle size distribution, elemental composition and removal efficiency of desulfurization system of four coal-fired units before and after wet desulphurization were collected by DGI load-bearing impactor, and the particle size distribution, elemental composition and removal efficiency of desulfurization system were analyzed.The results showed that the peak value of fine particle size appeared at 0.20 ~ 0.40 渭 m before desulphurization and 0.30 渭 m at 0.20 ~ 0.30 渭 m after desulphurization.Before and after desulphurization, 蟻 -Si-Si, 蟻 -Al) in particle size decreased with the decrease of particle size, and after desulfurization, 蟻 -Si-Si, 蟻 -Al) decreased to some extent, 蟻 _ (-Fe)) increased with the decrease of particle size, and showed a certain enrichment characteristic.婀挎硶鑴辩～鍚嶤a鍦≒M_1涓�鐨勮川閲忔祿搴﹀嚭鐜版槑鏄剧殑澧為暎�

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