左帅
ZUO Shuai

• 1:华能玉环电厂

摘要(Abstract)：

介绍了玉环电厂4号机组水汽质量劣化的现象及特征参数变化,对水汽质量劣化的可能原因进行了分析和排查,找出此次水汽质量劣化的根源是尿素溶液进入了热力系统。通过尿素的水解机理,重点分析了尿素溶液造成水汽质量劣化的过程。针对各取样点氢电导率的变化和水汽质量劣化的根源,提出了处理措施。
This paper describes deterioration of water and steam of units #4 in Yuhuan Power Plant and characteristic parameter change. The reasons of deteriorated water and steam are analyzed and found, and the source of deterioration is urea solution that enters into thermal system. By hydrolysis mechanism of urea, this paper lays special stress on analyzing the process that urea solution causes deteriorated water and steam; it puts forward corresponding treatment measures for variation of hydrogen conductivity in sampling points and source of deteriorated water and steam.

关键词(KeyWords)： 1000 MW;超超临界;水汽质量;劣化;尿素
1000 MW;ultra-supercritical;quality of water and steam;deterioration;urea

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 左帅
ZUO Shuai

DOI: 10.19585/j.zjdl.2014.12.013

参考文献(References)：

• [1]李培元.火力发电厂水处理及水质控制[M].北京:中国电力出版社,2005.
• [2]GB/T 12145-2008火力发电机组及蒸汽动力设备水汽质量[S].北京:中国标准出版社,2009.
• [3]陈进生.火电厂烟气脱硝技术——选择性催化还原法[M].北京:中国电力出版社,2008.
• [4]CHEN J P,ISA K.Thermal decomposition of urea and urea derivatives by simutaneous TG/(DTA)/MS[J].Journal of the Mass Spectrometry Society of Japan,1998,46(4):299-303.
• [5]杜成章,刘诚.尿素热解和水解技术在锅炉烟气脱硝工程中的应用[J].华北电力技术,2010(6):39-41.
• [6]ALZUETA M U,BILBAO R,MILLERA A,et al.Impact of new findings concerning urea thermal decomposition on the modeling of the urea-SNCR process[J].Energy&Fuels,2000,14(2):509-510.
• [7]冯蓓,杨敏,李秉风,等.二氧化碳腐蚀机理及影响因素[J].辽宁化工,2010,39(9):976-979.