燃煤电站细颗粒物化学团聚系统运行及经济性分析 -

为实现燃煤电厂的超低排放,对电厂安装细颗粒物化学团聚强化除尘系统的300 MW燃煤机组进行了细颗粒物化学团聚强化除尘技术工业应用试验,综合考察了化学团聚系统对机组除尘效率及电厂运行参数的影响,并对细颗粒物化学团聚强化除尘技术的经济性进行分析。机组全年运行数据表明,喷入团聚剂,脱硫后颗粒物平均浓度为3. 7 mg/m~3,较未喷团聚剂时下降约44. 7%。以300MW机组为例,化学团聚技术一次工程投资仅需600万元左右,不及湿式静电除尘技术投资额的1/2,经济性良好。连续喷入化学团聚剂后,ESP后及脱硫后SO_2浓度有所下降; O_2体积分数平均上升约0. 5%; ESP后烟气温度下降3～8℃。细颗粒物化学团聚强化除尘系统取得了良好的除尘提升效果。 Abstract:To achieve ultra-low emission of coal-fired power plants,the industrial application trials of fine particle chemical agglomeration enhanced dust removal system from a 300 MW coal-fired boiler plant boiler was studied in this paper.The effect of chemical agglomeration system on removal efficiency of fly ash fine particles and operational parameters of coal-fired power plant were studied,as well as the economic benefit of chemical agglomeration enhanced dust removal technique.The whole year operating data of the unit showes that the particle concentration after WFGD decreases to 3.7 mg/m3,which is decreased by 44.7% with the chemical agglomeration enhanced dust removal system.As for a 300 MW coal-fired boiler,the initial investment for chemical agglomeration technique is only about 6 million yuan,less than half of the cost for the wet electrostatic precipitation,which shows a better economy.The average SO2 concentration after ESP and WFGD decrease.The average O2 concentration increases by 0.5%.Besides,the flue gas temperature after ESP decreases by 3-8 ℃.The fine particle chemical agglomeration enhanced dust removal system helpes to improve the removal efficiency of fly ash fine particles