基于现场试验和流场数值模拟的脱硝喷氨均匀性优化  

OPTIMIZATION ON DENITRIFICATION AND AMMONIA SPRAYING UNIFORMITY BASED ON ON-SITE EXPERIMENTS AND FLOW FIELD NUMERICAL SIMULATION

作　　者：周赛男 ZHOU Sainan(Production and Technology Department of Qilu Branch Co.,SINOPEC,Zibo Shandong 255400)

机构地区：[1]中国石化齐鲁分公司生产技术部,山东淄博255400

出　　处：《齐鲁石油化工》2024年第1期35-40,共6页Qilu Petrochemical Technology

摘　　要：对于选择性催化还原(SCR)锅炉脱硝装置,衡量其运行状态的重要指标有脱硝效率、吨汽耗氨量、喷氨量和氨逃逸率等,而喷氨均匀性是影响SCR系统氨逃逸率、脱硝效率和喷氨量的重要因素之一。通过现场试验测定了SCR脱硝后NO、O_(2)的分布情况,建立了脱硝装置涡流混合器及其烟道的三维模型,基于计算流体力学(CFD)理论,采用FLUENT软件对脱硝装置涡流混合器及其烟道的流场进行了三维数值计算。根据试验结果和数值计算分析对喷氨均匀性进行优化调整,提高了SCR系统脱硝效率,降低了氨逃逸率、喷氨量,具有一定的经济效益。For the selective catalytic reduction(SCR)boiler denitrification device,important indicators to measure its operating status include denitrification efficiency,ammonia consumption per ton of steam,ammonia injection volume,and ammonia escape rate.The uniformity of ammonia injection is one of the important factors affecting the ammonia escape rate,denitrification efficiency,and ammonia injection volume of the SCR system.The distribution of NO and O_(2) after SCR denitrification was measured through on-site experiments,and a three-dimensional model of the vortex mixer and its flue in the denitrification device was established.Based on computational fluid dynamics(CFD)theory,the flow field of the vortex mixer and its flue in the denitrification device was three dimensional numerically calculated using FLUENT software.Based on the experimental results and numerical calculation analysis,the uniformity of ammonia injection was optimized and adjusted,the ammonia escape rate and ammonia injection volume were reduced,the denitration efficiency of SCR system was improved,and certain economic benefits were obtained.

关 键 词：锅炉SCR脱硝装置 喷氨均匀性 烟道流场分析 

分 类 号：X383[环境科学与工程—环境工程]