基于在线监测数据的催化再生烟气污染综合评价  

Comprehensive evaluation of air pollutant emission from Catalytic Cracking Units in petrochemical enterprises based on online monitoring data

作　　者：杨文玉 YANG Wenyu(State Key Laboratory of Chemical Safety,Qingdao 266104,Shandong,China;SINOPEC Research Institute of Safety Engineering Co.,Ltd.,Qingdao 266104,Shandong,China)

机构地区：[1]化学品安全全国重点实验室,山东青岛266104 [2]中石化安全工程研究院有限公司,山东青岛266104

出　　处：《安全与环境学报》2024年第5期2017-2024,共8页Journal of Safety and Environment

基　　金：中国石化重大科技项目(321123)。

摘　　要：为综合评估催化裂化装置废气排放对环境大气的污染状况,以28套典型催化裂化装置的催化剂再生烟气为研究对象,统计分析2022年1—12月上述装置排放的3种大气污染物(SO^(2)、NO_(x)和颗粒物)的质量浓度和废气流量的连续小时级在线监测数据。SO2、NO_(x)和颗粒物排放质量浓度均值分别为5.95 mg/m^(3)、39.32 mg/m^(3)和6.30 mg/m^(3),污染物达标排放率达到99.99%,仅通过达标排放率难以判别装置间的污染排放水平。因此,本文通过层次分析(Analytic Hierarchy Process,AHP)主观赋权法与指标相关性权重(Criteria Importance Through Intercriteria Correlation,CRITIC)客观赋权法相结合的方式构建了催化再生烟气污染评价指数(Exhaust Pollution Evaluation Index,Iepe),并结合聚类分析结果和废气污染评价指数计算数据,确定了适用于评估催化再生烟气污染排放等级的Iepe。通过对废气污染评价指数的综合分析发现,催化再生烟气处于超低污染水平的催化裂化装置有3套,处于低强度污染水平的催化裂化装置有20套,处于中等强度污染水平的催化裂化装置有5套。氮氧化物和颗粒物质量浓度对催化再生烟气污染评价指数的贡献较大,建议炼化企业将催化再生烟气的氮氧化物和颗粒物质量浓度作为废气污染管控的重点,以进一步提升催化裂化装置的绿色低碳水平。To evaluate the pollution of the environmental atmosphere of the catalytic cracking unit,the concentration of three atmospheric pollutants(SO_(2),NO_(x),and particulate matter)and the waste gas flow from January to December 2022 were statistically analyzed.The average emission concentrations of the three pollutants were 5.95 mg/m^(3),39.32 mg/m^(3),and 6.30 mg/m^(3).The pollutant emission rate has reached 99.99%,and it is difficult to distinguish the level of pollution emission between devices only by the standard discharge rate.To evaluate the clean production level of the existing process of the Catalytic Cracking Unit and the effect of air pollution control,the hourly continuous online monitoring data of three conventional air pollutants(SO_(2),NO_(x),and particulate matter)concentration and Exhaust gas flow of 28 Catalytic Cracking Unit in 2022 were collected.The mean values of pollutant emission concentrations were statistically analyzed.The average concentration of SO_(2),NO_(x),and particulate matter of the 28 Catalytic Cracking Units were 5.95 mg/m^(3),39.32 mg/m^(3) and 6.30 mg/m^(3) respectively.The standard emission rate of air pollution reached 99.99%.Furthermore,in this study,the catalytic recycled flue gas pollution evaluation index(I epe)was constructed by combining the AHP subjective empowerment method and the CRITIC objective empowerment method,and the I epe was determined by combining the cluster analysis results and the calculation data of I epe.Through the comprehensive analysis of the exhaust gas pollution evaluation index,it is found that there are 3 sets of catalytic cracking units at ultra-low pollution levels,20 sets of catalytic cracking units in low-intensity pollution,and 5 sets of catalytic cracking units with moderate pollution.It is recommended that refinery enterprises take the concentration of nitrogen oxides and particulate matter in catalytic regeneration flue gas as the focus to improve the green and low-carbon level of catalytic cracking equipment.

关 键 词：环境工程学 催化裂化 再生烟气 在线监测 污染评价指数 

分 类 号：X74[环境科学与工程—环境工程]