摘要
随着我国工业的发展和城市化进程的加快,近年我国的危险化学品安全事故频发,国家要求对重大危险源进行严格管控,尤其是液氨、氢气及氯气等易燃易爆气体的管控,加快液氨与尿素的替代转换,预防重大安全事故,切实保障人民群众生命及财产安全。火力发电厂运行产生的烟气,需要通过脱硝处理,将NO_(x)还原成N_(2)排入大气。火力发电厂运行一般采用液氨作为脱硝还原剂。随着经济发展,人们对于安全生产的意识逐步提高,液氨由于存储及运输受限,被列为重大危险源,氨气可通过液氨加热气化产生,也可以通过氨水蒸发或者通过尿素分解来间接制备。尿素不属于危险品,运输与存储相对安全,受热分解即可产生氨气,因此一般将脱硝还原剂改为尿素。
With the development of China′s industry and the acceleration of the urbanization process,in recent years,China′s hazardous chemical safety accidents occur frequently,the National Energy Department requires strict control of major sources of danger,especially the control of flammable and explosive gases such as liquid ammonia,hydrogen and chlorine,so accelerate the alternative conversion of liquid ammonia and urea to prevent the occurrence of major safety accidents and effectively protect the safety of people′s lives and property.The flue gas generated by the operation of thermal power plants needs to be treated by denitrification treatment to reduce NO_(x)to N_(2)and discharged into the atmosphere.During the operation of thermal power plants,liquid ammonia is generally used as a denitrification reducing agent.With the development of the economy,people′s awareness of safe production has gradually improved,liquid ammonia has been listed as a major source of danger due to limited storage and transportation,ammonia can be produced by liquid ammonia heating vaporization,or can be indirectly prepared by ammonia evaporation or urea decomposition.Urea is not a dangerous good,transportation and storage are relatively safe,and ammonia gas can be produced when decomposed by heat.Therefore,the denitrification reducing agent is generally changed to urea.
作者
王帅
成新兴
唐如意
张超
田露
申世飞
李焕萍
WANG Shuai;CHENG Xinxing;TANG Ruyi;ZHANG Chao;TIAN Lu;SHEN Shifei;LI Huanping(Xi′an Boiler&Environmental Protection Engineering Co.,Ltd.,Xi′an 710054,China)
出处
《洁净煤技术》
CAS
CSCD
北大核心
2023年第S02期450-453,共4页
Clean Coal Technology
基金
华能集团总部科技基金资助项目(HNKJ21-HF326)
关键词
燃煤发电厂
液氨改尿素
工程设计
重大危险源
coal fired power plants
liquid ammonia to urea
engineering design
significant source of danger
