TUD-DNS3型烟气脱硝助剂在重油催化裂化装置的工业应用  

Summary of industrial application of TUD-DNS3 flue gas denitrification additivein heavy oil catalytic cracking unit

作　　者：孙坤滨 刘丽强 程相民 Sun Kunbin;Liu Liqiang;Cheng Xiangmin(SINOPEC Hainan Refining&Chemical Co.,Ltd.,Yangpu,Hainan 578101)

机构地区：[1]中国石化海南炼油化工有限公司,海南洋浦578101

出　　处：《炼油技术与工程》2024年第6期57-60,共4页Petroleum Refinery Engineering

摘　　要：自2023年6月1日起,海南省洋浦经济开发区催化裂化催化剂再生烟气NO_(x)排放浓度限值由200 mg/m 3降至100 mg/m^(3)。某企业为避免烟气NO_(x)排放超标,进行了TUD-DNS3型脱硝助剂工业应用试验。加注该脱硝助剂后,烟气NO_(x)质量浓度稳步降低,在助剂累计量达到系统催化剂总藏量约2.5%时,综合塔出口NO_(x)质量浓度由135 mg/m 3降至92 mg/m^(3),脱除率达30%以上。TUD-DNS3磨损指数为1.78%,新鲜催化剂磨损指数为2.10%,二者相差不大,表现为助剂加注前后油浆固含量基本不变。在外排烟气SO_(2)质量浓度基本不变的情况下,脱硫脱硝耗碱量约下降2 t/d,气体产品中硫化氢含量上升,说明TUD-DNS3具有一定硫转移效果。TUD-DNS3加注后再生烟气中CO/CO_(2)体积比由0.367降至0.238,再生侧取热负荷增加,外取热器产汽量增加约17 t/h,在余热锅炉炉膛温度维持稳定的情况下,余热锅炉消耗燃料气量有所上升。Starting from June 1,2023,the NO_(x) emission limit of catalytic cracking catalyst regeneration flue gas in Yangpu Economic Development Zone has been reduced from 200 mg/m 3 to 100 mg/m 3.A certain enterprise conducted industrial application tests of TUD-DNS3 denitration additive to avoid excessive NO_(x) emissions from flue gas.After adding the denitration agent,the mass concentration of NO_(x) in the flue gas steadily decreased.When the cumulative amount of the agent reached about 2.5%of the total catalyst storage in the system,the mass concentration of NO_(x) at the outlet of the comprehensive tower decreased from 135 mg/m^(3) to 92 mg/m 3,and the removal rate reached over 30%.The wear index of TUD-DNS3 was 1.78%,and the wear index of fresh catalyst was 2.1%.The difference in wear index between the two was not significant,as the concentration of smoke dust and solid content of oil slurry remained basically unchanged before and after the addition of additives.When the mass concentration of SO_(2) in the discharged flue gas remains basically unchanged,the alkali consumption for desulfurization and denitrification decreased by about 2 t/d,and the hydrogen sulfide content in the gas product increased,indicating that TUD-DNS3 had a certain sulfur transfer effect.After the addition of TUD-DNS3,the CO/CO_(2) ratio in the regenerated flue gas decreased from 0.367 to 0.238.The heat load on the regeneration side increased,and the steam generation of the external heat exchanger increased by about 17 t/h.While the furnace temperature of the waste heat boiler remained stable,the fuel gas consumption of the waste heat boiler increased.

关 键 词：TUD-DNS3 重油催化裂化 烟气 NO_(x) 加注方案 SO_(x)硫转移 脱硝助剂 

分 类 号：TE96[石油与天然气工程—石油机械设备]