某燃气轮机电厂启动全过程无硝黄烟排放操作方法  

A Methodology for Yellow Non-Nitrate Smoke Emission During the Full-Process Startup of A Gas Turbine Power Plant

作　　者：张石凯 程硕 黄庆 周建 朱为东 唐寅 ZHANG Shikai;CHENG Shuo;HUANG Qing;ZHOU Jian;ZHU Weidong;TANG Yin(Nanjing Gas Turbine Power Generation Co.,Ltd.of China Huaneng Group,Nanjing 210034,Jiangsu,China)

机构地区：[1]中国华能集团南京燃机发电有限公司,江苏南京210034

出　　处：《南方能源建设》2024年第4期144-155,共12页Southern Energy Construction

基　　金：国家自然科学基金面上项目“双碳目标下发电企业低碳技术创新扩散及其产业链协同”(72272050)。

摘　　要：[目的]某燃气轮机电厂的GE-PG9351FA型燃气轮机发电机组,目前采用DLN2.0+燃烧器,设计NO_(x)(氮氧化物)排放浓度为50 mg/m^(3),启动过程中大量排放黄色烟雾,已无法满足《火电厂大气污染物排放标准》(GB 13223—2011)要求,频繁遭到周围居民举报。根据江苏环保排放新规,自2023年1月1日起,NO_(x)折算排放全程小时均值均小于30 mg/m^(3)。针对该种型号燃烧器进一步降低NO_(x)且解决启动过程中硝黄烟排放的需求,电厂采用余热锅炉烟道SCR脱硝改造技术,且对启动过程各指标控制进行数据模拟推演、分析总结,提炼出合理的启动操作方法。[方法]为验证该操作方法的可行性,电厂进行了多次调峰启动过程操作试验,并根据实际NO_(x)排放特性修正操作方法中的启动时刻、燃气轮机负荷控制、SCR脱硝系统投入节点,形成最优化操作法。[结果]试验结果表明:在优化电厂SCR脱硝系统投入时刻、燃气轮机启动时刻、并网后暖机负荷后,NO_(x)折算排放全程小时均值均小于30 mg/m^(3),且硝黄烟排放现象消失。[结论]该操作策略是基于燃气轮机启动过程NO_(x)与硝黄烟排放特性而得出,后期通过数据推演和大量试验验证,可为同类型燃气轮机启动过程降低氮氧化物与硝黄烟现象提供直接指导,并为燃气轮机电厂调峰运行的NO_(x)排放控制提供分析借鉴思路。[Introduction]The gas turbine generator set(GE-PG9351FA)with a DLN2.0+burner and a designed NO_(x) emission concentration of 50 mg/m^(3) is used in a gas turbine power plant.During the warm-up periods,the generator set emitted a large amount of yellow smoke,which violates provisions stipulated in the"Emission Standard for Air Pollutants from Thermal Power Plants"(GB 13223—2011)and is complained by the surrounding residents.According to the new emission regulations for environmental protection in Jiangsu,starting from January 1,2023,the converted NO_(x) emission average throughout the operation period should be less than 30 mg/m^(3).In order to meet this requirement and reduce the emission of yellow nitrate smoke during start-up,the renovated SCR denitration technology for the flue gas of the HRSG(Heat Recovery Steam Generator)is adopted.Data simulation,deduction,analysis and summarization of various indicators are conducted during the start-up process to refine a reasonable startup operation method.[Method]To validate the feasibility of this method,the power plant conducted multiple peak shaving start-up process operation tests.for the SCR system in the operation method.This process resulted in an optimized operational strategy.[Result]The test results show that by optimizing the SCR denitration system input point,gas turbine start-up point and warm-up load after grid connection,the converted NO_(x) emission average throughout the operation period is less than 30 mg/m^(3),and the phenomenon of yellow nitrate smoke disappeared.[Conclusion]This strategy is based on the characteristics of NO_(x) and yellow nitrate smoke emission during the gas turbine start-up process.Afterward,through data deduction and numerous experiments for validation,it can provide direct guidance for reducing yellow nitrate smoke emission during the start-up process of similar gas turbines.Additionally,it can serve as an analytical reference for controlling NO_(x) emissions during peak shaving operations in gas turbine power plants.

关 键 词：燃气轮机电厂 氮氧化物 硝黄烟 模拟推演 启动时刻 暖机负荷 排放控制 

分 类 号：TM611[电气工程—电力系统及自动化] X773[环境科学与工程—环境工程]