节能技术与应用64节能ENERGYCONSERVATIONNO.052023锅炉脱硝稀释风源优化技术研究与应用潘承基（中电（普安）发电有限责任公司，贵州普安561500）摘要：针对锅炉脱硝稀释风系统中灰与氨气结晶物易堵塞喷氨支路阀门和喷嘴的问题，采用经热一次风加热后的冷一次风作为稀释风源替代原空预器出口热一次风，并分析其经济性与可行性。结果显示：稀释风系统改造后，气气换热器（GGH）出口稀释风温远超过200℃并且不超过320℃，满足尿素水解产品对稀释风温度的要求；解决了喷氨格栅堵塞问题，喷氨管路喷氨均匀性得到改善，系统总氨耗量下降，经济性得到提高。关键词：喷氨堵塞；气气换热器（GGH）；稀释风系统中图分类号：X701文献标识码：B文章编号：1004-7948（2023）05-0064-04doi：10.3969/j.issn.1004-7948.2023.05.017ResearchandapplicationofboilerdenitrificationdilutionairsourceoptimizationtechnologyPANCheng-jiAbstract：Aimingattheproblemthattheashandammoniacrystalsintheboilerdenitrificationdilutionairsystemoftheboilerareeasytoblockthevalvesandnozzlesoftheammoniainjectionbranch,thecoldprimaryairheatedbythehotprimaryairisusedasthedilutionairsourcetoreplacethehotprimaryairattheoutletoftheoriginalairpreheater,anditseconomyandfeasibilitywereanalyzed.Theresultsshowthatafterthedilutionairsystemisreformed,thetemperatureofthedilutionairattheoutletofthegas-gasheatexchanger(GGH)farexceeds200℃anddoesnotexceed320℃,whichmeetstherequirementsoftheureahydrolyzedproductforthedilutionairtemperature.Theblockageoftheammoniainjectiongrilleissolved.Theuniformityofammoniainjectionintheammoniainjectionpipelineisimproved,theoverallammoniaconsumptionofthesystemisreduced,andtheeconomyisimproved.Keywords:ammoniainjectionblockage;GGH;dilutionairsystem引言中电（普安）发电公司1#、2#锅炉设置两台脱硝反应器，脱硝反应器布置在省煤器和空预器之间。投运以来，由于稀释风源飞灰量大，飞灰与氨气的结晶物堵塞在喷氨支管手动调阀和喷氨格栅AIG喷嘴上，导致脱硝喷氨自动控制调节性变差、氨逃逸超标。为了彻底解决稀释风系统积灰结晶堵塞和电能损耗高的问题，采用气气换热器(GGH)加热冷一次风后替代原脱硝系统稀释风[1-2]，并对改造效果进行分析。1锅炉脱硝系统介绍1.1锅炉总体概况中电（普安）...
