摘要
为解决石灰石-石膏湿法脱硫系统烟气换热器(GGH)的结垢、堵塞、腐蚀问题,提出了GGH新型化学清洗工艺,不拆卸换热元件,直接在GGH表面喷淋中性化学清洗剂,清洗周期短,除垢率≥95%,不腐蚀换热元件和设备,化学清洗废水经电厂废水系统处理后合格排放。采用新工艺清洗的GGH,脱硫系统投运率提高了0.5%以上,减少了SO2排放,社会效益良好。经测算,1台600MW机组(1个检修周期)采用新工艺化学清洗1次,1年可产生100万～200万元的经济效益。
In order to solve the problems of scaling,blockage and corrosion of the GGH of limestone-gypsum wet desulphurization system,a new type chemical clean technology for GGH was proposed,in which it is not needed to dismantle the heat transfer elements.The neutral chemical cleaning agent will be sprayed on the GGH surfaces directly.The cleaning period of the new technology is shorter.The scale-removing efficiency of the new technology is not less than 95%.The neutral chemical cleaning agent does not corrode the heat transfer elements and devices.The waste water of chemical cleaning will be treated in the power plant waste water system and discharged as qualified waste water.The operation rate of the desulphurization system,the GGH of which had been cleaned by the new technology,was increased by more than 0.5%.The SO2 emission was decreased,and favorable social effect was obtained.According to the estimation,to clean a 600MW unit one time in a overhaul period can generate the economic benefit $1,000,000~2,000,000 in one year.
出处
《华电技术》
CAS
2013年第1期69-71,81,共3页
HUADIAN TECHNOLOGY
基金
2011年浙江省能源集团科技项目(ZN-KJ-11-25)
关键词
烟气换热器
结垢
堵塞
新型化学清洗工艺
应用
gas-gas heater(GGH)
scaling
blockage
new type chemical clean technology
application
作者简介
陈统钱（1967-），男，浙江天台人，总工程师，高级工程师，从事火电厂热力系统及烟气系统脱硫、脱硝等方面的管理和研究工作（E-mail：chentongqian@yqpp．com）。
