喷氨调平协同流场优化的脱硝提效方法应用研究  

Research on application of denitration efficiency improvement method of ammonia injection leveling collaborative flow field optimization

作　　者：叶兴联 YE Xinglian(Environmental Research Institute of Fujian Longking Co.,Ltd.,Longyan Fujian 364000,China)

机构地区：[1]福建龙净环保股份有限公司环境研究院,福建龙岩364000 [2]国家环境保护电力工业烟尘治理工程技术中心,福建龙岩364000

出　　处：《工业安全与环保》2024年第7期83-89,共7页Industrial Safety and Environmental Protection

基　　金：国家重点研发计划(2022YFC370150402)。

摘　　要：“双碳”背景下,针对燃煤电站运行负荷多变导致NOx排放难以满足要求的现状,以某600 MW脱硝装备为研究对象,采用喷氨调平协同流场优化方法进行提效研究。首先对现役脱硝装备流场进行诊断并优化,然后根据氨气流线对应法则进行喷氨调平,实现脱硝提效目的。经流场诊断和优化后,各项脱硝装备流场指标均有明显改善,脱硝效率提升3.4%;对喷氨分区调平后,100%负荷时A、B侧脱硝出口NOx质量浓度分布偏差系数分别降低36.4%和44.8%,NOx排放分别进一步降低9.1%和8.3%,氨逃逸分别降低15.0%和14.3%,且低负荷条件下脱硝效率仍保持较优水平;运行结果表明,提效改造后反应器潜能P比改造前提高了16%,可为当前在役脱硝装备的提效改造提供参考依据。In response to the changing operating load of coal-fired power plants in the context of"dual carbon",which makes it difficult to meet the requirements for NOx emissions,taking a 600 MW denitration equipment as the research object,an efficiency improvement study was conducted using ammonia injection leveling collaborative flow field optimization method.Firstly,the flow field of active DeNOx equipment is diagnosed and optimized.Then,according to the ammonia flow line,ammonia injection is leveled to achieve the goal of DeNOx efficiency improvement.After flow field diagnosis and optimization,the flow field indicators have significantly improved,with a 3.4%increase in DeNOx efficiency.After leveling the ammonia injection zone,at 100%load,the deviation coefficient of NOx concentration distribution at the DeNOx outlets at A and B sides decreased by 36.4%and 44.8%,NOx emissions further decreased by 9.1%and 8.3%,ammonia escape decreased by 15.0%and 14.3%,respectively,and the DeNOx efficiency remained at an optimal level under low load conditions.The operation results show that the potential of the reactor after the efficiency improvement transformation has increased by 16%compared to before the transformation,which can provide a reference basis for the efficiency improvement of the current in-service DeNOx equipment.

关 键 词：喷氨调平 协同 流场优化 脱硝提效 

分 类 号：X773[环境科学与工程—环境工程]