工程科学学报，第40卷，第10期：1208-1214,2018年10月 Chinese Journal of Engineering,Vol.40,No.10:1208-1214,October 2018 DOI:10.13374/j.issn2095-9389.2018.10.007;http://journals.ustb.edu.cn 除尘灰水洗对烟气颗粒物组成和二噁英的影响 岳昌盛12)，彭犇12)，王晟)，刘诗诚2)，张璞12) 1)中治建筑研究总院有限公司，北京1000882)中冶节能环保有限责任公司，北京100088 ☒通信作者，E-mail:peng中enl63@163.com 摘要为研究除尘灰配入烧结对烟气颗粒物组成和二噁英的影响，利用水洗方式对烧结除尘灰进行除杂改性，然后采用烧 结杯测定改性前后配入对烧结矿性能的影响，并通过撞击式颗粒物采样器和二噁英采样器对烟气污染物进行采样分析，研究 改性前后配入烧结对颗粒物组成碱金属和重金属含量以及烟气二噁英和前驱体物质排放量的影响.结果表明：烧结除尘灰中 的K和C!在水洗除杂改性过程中被有效去除，除杂后的除尘灰配加烧结有助于改善烧结矿粒度组成、减少烟气颗粒物和二噁 英排放浓度：K组成在烧结颗粒物排放中占有较高比例，远高于金属Na,P%和Z的含量，且在粒度较细的细颗粒物中占比更 高，水洗除杂后配入烧结可显著降低烧结配料中的K组成，使得烟气排放的K组成显著降低，进一步降低颗粒物的排放浓度， 其中又以1.10-2.10μm粒度范围的颗粒物和K组成的减排比例最高：烧结原料C1组成和烧结过程中的有机前驱体氯苯、多 氯联苯是烟气二噁英生成的重要诱因，除尘灰水洗在降低C1组成的同时也显著降低烟气前驱体多氯联苯排放量达40%，有 利于降低烟气中二噁英的排放浓度. 关键词颗粒物；二噁英；除尘灰；烧结烟气；碱金属；机理 分类号X756 Impact of water washing precipitator dust on the particulate composition and dioxins in sintering flue gas YUE Chang-sheng2),PENG Ben),WANG Sheng,LIU Shi-cheng),ZHANG Pu2) 1)Central Research Institute of Building and Construction,MCC Group Co,Ltd,Beijing 100088,China 2)Energy Saving and Environmental Orotection.MCC Group Co,Lid,Beijing 100088,China Corresponding author,E-mail:pengben163@163.com ABSTRACT Sintering is an important process for the smelting of iron and steel for ironmaking in a blast furnace.However,the sin- tering process emits air pollutants in the sintering flue gas,especially fine particles and dioxins.In order to study the effects of sintering with precipitator dust on the composition of particulate matter and dioxins in the sintering flue gas,the precipitator dust was purified by a water washing method.The influence of sintering with the precipitator dust before and after the purifying modification was determined by a sintering cup experiment.The flue gas pollutants were then collected by the impact particle sampler and dioxin sampler and the al- kali content,heavy metal content and dioxin precursor emissions were determined.The experimental results indicate that potassium (K)and chlorine (Cl)in the precipitator dust are effectively removed by the water washing method.The sintering with the purifying modification and precipitator dust improve the particle size distribution of the sinter and reduce the concentration of particulates and dioxins that are emitted in the flue gas.The K content is higher in the sintered particles,especially the smaller ones,compared to sodi- um (Na),lead (Pb),and zinc (Zn).Sintering with the precipitator dust after washing significantly reduces the K content of the sin- ter burden proportion and causes the notable reduction of K in the flue gas particles,particularly in the particle size range of 1.10- 2.10 pm.The Cl in the sintering raw material,along with the chlorobenzene and polychlorinated biphenyls that are generated in the 收稿日期：2018-04-04 基金项目：北京市科技新星计划资助项目(Z181100006218096):国家重点研发计划课题资助项目(2017YFC0210302)工程科学学报,第 40 卷,第 10 期:1208鄄鄄1214,2018 年 10 月 Chinese Journal of Engineering, Vol. 40, No. 10: 1208鄄鄄1214, October 2018 DOI: 10. 13374 / j. issn2095鄄鄄9389. 2018. 10. 007; http: / / journals. ustb. edu. cn 除尘灰水洗对烟气颗粒物组成和二噁英的影响 岳昌盛1,2) , 彭 犇1,2) 苣 , 王 晟1) , 刘诗诚1,2) , 张 璞1,2) 1)中冶建筑研究总院有限公司, 北京 100088 2) 中冶节能环保有限责任公司, 北京 100088 苣通信作者, E鄄mail: pengben163@ 163. com 摘 要 为研究除尘灰配入烧结对烟气颗粒物组成和二噁英的影响,利用水洗方式对烧结除尘灰进行除杂改性,然后采用烧 结杯测定改性前后配入对烧结矿性能的影响,并通过撞击式颗粒物采样器和二噁英采样器对烟气污染物进行采样分析,研究 改性前后配入烧结对颗粒物组成碱金属和重金属含量以及烟气二噁英和前驱体物质排放量的影响. 结果表明:烧结除尘灰中 的 K 和 Cl 在水洗除杂改性过程中被有效去除,除杂后的除尘灰配加烧结有助于改善烧结矿粒度组成、减少烟气颗粒物和二噁 英排放浓度;K 组成在烧结颗粒物排放中占有较高比例,远高于金属 Na、Pb 和 Zn 的含量,且在粒度较细的细颗粒物中占比更 高,水洗除杂后配入烧结可显著降低烧结配料中的 K 组成,使得烟气排放的 K 组成显著降低,进一步降低颗粒物的排放浓度, 其中又以 1郾 10 ~ 2郾 10 滋m 粒度范围的颗粒物和 K 组成的减排比例最高;烧结原料 Cl 组成和烧结过程中的有机前驱体氯苯、多 氯联苯是烟气二噁英生成的重要诱因,除尘灰水洗在降低 Cl 组成的同时也显著降低烟气前驱体多氯联苯排放量达 40% ,有 利于降低烟气中二噁英的排放浓度. 关键词 颗粒物; 二噁英; 除尘灰; 烧结烟气; 碱金属; 机理 分类号 X756 收稿日期: 2018鄄鄄04鄄鄄04 基金项目: 北京市科技新星计划资助项目(Z181100006218096);国家重点研发计划课题资助项目(2017YFC0210302) Impact of water washing precipitator dust on the particulate composition and dioxins in sintering flue gas YUE Chang鄄sheng 1,2) , PENG Ben 1,2) 苣 , WANG Sheng 1) , LIU Shi鄄cheng 1,2) , ZHANG Pu 1,2) 1)Central Research Institute of Building and Construction, MCC Group Co, Ltd, Beijing 100088, China 2)Energy Saving and Environmental Orotection, MCC Group Co, Ltd, Beijing 100088, China 苣Corresponding author, E鄄mail: pengben163@ 163. com ABSTRACT Sintering is an important process for the smelting of iron and steel for ironmaking in a blast furnace. However, the sin鄄 tering process emits air pollutants in the sintering flue gas, especially fine particles and dioxins. In order to study the effects of sintering with precipitator dust on the composition of particulate matter and dioxins in the sintering flue gas, the precipitator dust was purified by a water washing method. The influence of sintering with the precipitator dust before and after the purifying modification was determined by a sintering cup experiment. The flue gas pollutants were then collected by the impact particle sampler and dioxin sampler and the al鄄 kali content, heavy metal content and dioxin precursor emissions were determined. The experimental results indicate that potassium (K) and chlorine (Cl) in the precipitator dust are effectively removed by the water washing method. The sintering with the purifying modification and precipitator dust improve the particle size distribution of the sinter and reduce the concentration of particulates and dioxins that are emitted in the flue gas. The K content is higher in the sintered particles, especially the smaller ones, compared to sodi鄄 um (Na), lead (Pb), and zinc (Zn). Sintering with the precipitator dust after washing significantly reduces the K content of the sin鄄 ter burden proportion and causes the notable reduction of K in the flue gas particles, particularly in the particle size range of 1郾 10鄄鄄 2郾 10 滋m. The Cl in the sintering raw material, along with the chlorobenzene and polychlorinated biphenyls that are generated in the