300MW锅炉贫改烟改造技术优化及应用  

Optimization and Application of 300 MW Boiler Lean to Smoke Transformation Technology

作　　者：雷平武 LEI Pingwu(Chang′an Yiyang Power Generation Co.,Ltd.,Yiyang,Hunan 413000,China)

机构地区：[1]长安益阳发电有限公司,湖南益阳413000

出　　处：《自动化应用》2024年第16期51-53,63,共4页Automation Application

摘　　要：近年来,新能源发电发展迅速,但其发电负荷随机性大,严重影响了电网的安全运行。为适应节能减排及消纳新能源的要求,对锅炉进行调峰调频及灵活性改造已成为必然趋势。贫煤锅炉大比例掺烧烟煤可大幅提高锅炉的稳燃性,降低锅炉原烟气中NOx及SOx的含量,减小空预器、吸收塔除雾器堵塞的风险,但采用中储式热风送粉系统的贫煤锅炉大比例掺烧烟煤存在制粉系统爆炸、一次风送粉管道烧损和炉膛结焦的风险。为此,某电厂提出并实施一种冷热炉烟联合防爆、冷热一次风混合降温、低省回收排烟余热的综合性改造方案,取得了良好效果。In recent years,new energy power generation is developing rapidly,but the randomness of its power generation load is large,which seriously affects the safe operation of the power grid.In order to adapt to the requirements of energy saving and emission reduction as well as new energy consumption,it has become an inevitable trend to carry out FM and flexibility modification of boilers.The large proportion of bituminous coal blending in lean coal boilers can greatly improve the boiler′s stable combustion,reduce the NOx and SOx content in the boiler′s raw flue gas,and reduce the risk of clogging the air preheater and the mist eliminator of the absorber tower.However,the large proportion of bituminous coal blending in lean coal boilers that use a medium-storage type hot-air powder feeding system has the risk of powder making system explosion,primary air powder feeding pipeline burning,and furnace coking.Therefore,a power plant proposes and implements a comprehensive transformation program of combined explosion-proofing of hot and cold furnace smoke,mixed cooling of cold and hot primary air,and low-saving recovery of exhaust waste heat,which has achieved good results.

关 键 词：贫改烟 冷热一次风混合降温 制粉系统防爆 炉膛结焦 

分 类 号：TM621.2[电气工程—电力系统及自动化]