摘要
针对工业炉窑协同处置二次灰渣(飞灰、铝灰)项目,本文设计一套“选择性非催化还原(SNCR)+重力沉降+布袋除尘+臭氧脱硝+烟气降温+石灰石-石膏湿法双塔双循环+高效除雾”工艺装置。生产线共有两条炉窑,单条炉窑出口烟气量为4.8万m^(3)/h,总烟气量为9.6万m^(3)/h,原烟气SO_(2)浓度为7000~8000 mg/m^(3),氮氧化物(NO_(x))浓度为400~500 mg/m^(3),粉尘浓度为20 g/m^(3)。根据烟气实际组分及含量,对炉窑烟气净化工艺进行详细分析。系统运行结果表明,该方案可保障烟气中SO_(2)排放浓度不大于50 mg/m^(3)、NO_(x)浓度不大于100 mg/m^(3)、粉尘浓度不大于5 mg/m^(3)。
For the project of collaborative disposal of secondary ash(fly ash,aluminum ash)in industrial kilns,this paper designs a set of“selective non-catalytic reduction(SNCR)+gravity sedimentation+bag dust removal+ozone denitrification+flue gas cooling+limestone-gypsum wet dual tower dual circulation+efficient mist removal”process device.The production line has two kilns,with a single kiln outlet flue gas volume of 48000 m^(3)/h and a total flue gas volume of 96000 m^(3)/h,and the original flue gas SO_(2) concentration is 7000~8000 mg/m^(3),the nitrogen oxide(NO_(x))concentration is 400~500 mg/m^(3),and the dust concentration is 20 g/m^(3).A detailed analysis is conducted on the purification process of kiln flue gas based on the actual composition and content of the flue gas.The system operation results indicate that this scheme can ensure that the concentration of SO_(2) emissions in the flue gas is not more than 50 mg/m^(3),the concentration of NO_(x) is not more than 100 mg/m^(3),and the concentration of dust is not more than 5 mg/m^(3).
作者
周金良
张宇驰
胡兰
徐昱煚
ZHOU Jinliang;ZHANG Yuchi;HU Lan;XU Yujiong(Yuyuan Ninghai Environmental Protection Technology Co.,Ltd.,Ningbo 315612,China)
出处
《中国资源综合利用》
2023年第11期148-152,共5页
China Resources Comprehensive Utilization
基金
2021年度宁波市“科技创新2025”重大专项“典型工业炉窑协同处置二次灰渣技术研究与示范”(2022Z031)。
关键词
炉窑烟气
洁净排放
工艺设计
kiln flue gas
clean emission
process design
作者简介
周金良(1989-),男,黑龙江哈尔滨人,硕士,工程师。研究方向:环境保护技术;通信作者:张宇驰(1994-),男,浙江宁波人,助理工程师。研究方向:危险废物处置与利用。
