脱硫烟囱防腐改造设计及材料的选择  

Desulfurized stack anti-corrosion reconstruction design and material selection

作　　者：王杰 邱质彬 王恒 袁霖 杨林 

机构地区：[1]贵州华电桐梓发电有限公司,贵州遵义563200 [2]华电电力科学研究院,杭州310030

出　　处：《华电技术》2016年第11期60-63,共4页HUADIAN TECHNOLOGY

摘　　要：在愈来愈严格的环保要求下,火力发电厂对尾部环保设施进一步改造,彻底取消旁路烟道,前移或取消烟气再热器,增设湿式电除尘器,都会造成烟囱运行工况发生转变。通过理论分析与试验结合的方式对新形势下烟囱运行状况进行了分析,认为烟囱中烟气的运行状况虽有所好转,但腐蚀环境仍然恶劣,烟囱防腐工作依然重要。对几类易产生问题的烟囱防腐技术进行了分析并对新形势下脱硫烟囱防腐改造设计、材料的选择以及方案实施提出了建议。Under the more and more strict environmental protection requirement,power plants are stepping forward on the flue gas environmental facilities reconstruction. Completely remove bypass flue,forward lead or remove gas-gas heater or add wet electrical static precipitator,any kind of these reconstructions will change the stack operating condition. By combined theoretical analyzing and lab test,stack operating condition under the new circumstance was analyzed. Authors indicated that even though the stack operating condition is getting batter,the corrosion condition is still very serious. Stack anti-corrosion is still very important. A few kinds of problematic stack anti-corrosion technologies were analyzed. Suggestions for stack anti-corrosion reconstruction design,material selection and construction implementation under the new circumstance were provided.

关 键 词：火力发电厂 脱硫 烟囱 防腐 烟气再热器 

分 类 号：TG179[金属学及工艺—金属表面处理]