超低排放改造后烟气余热利用设备存在问题及防治措施  

Existing problems and control measures of flue gas waste heat utilization equipment after ultra-low emission modification

作　　者：牟春华[1] 王一坤[1] 白文刚[1] 郭明[2] 张华东[3] MU Chunhua;WANG Yikun;BAI Wengang;GUO Ming;ZHANG Huadong(Xi'an Thermal Power Research Institute Co.,Ltd.,Xi'an 710054,China;Huaneng Xindian Power Plant,Zibo 255414,China;Huanneng Shandong Power Generation Company Jinan 250014,China)

机构地区：[1]西安热工研究院有限公司,陕西西安710054 [2]华能辛店电厂,山东淄博255414 [3]华能山东发电有限公司,山东济南250014

出　　处：《热力发电》2020年第4期46-50,共5页Thermal Power Generation

摘　　要：随着火电厂超低排放改造的普遍应用,低温省煤器等烟气余热利用设备获得了广泛应用。本文针对烟气余热利用设备在实际工程应用中所存在的低温腐蚀、磨损、积灰堵塞以及振动等问题,分析了形成原因及主要影响因素,提出了选用耐低温腐蚀性能优异的材料制造换热器,合理设计受热面结构型式,控制烟气流速和受热面金属壁温,加装吹灰设备以及导流板和防振隔板等防治对策,有效地解决了烟气余热利用设备所存在的低温腐蚀、磨损、积灰堵塞以及振动等问题。With the widespread application of ultra-low emission transformation of thermal power plants,flue gas waste heat utilization equipments such as low temperature economizer has been widely used.In this paper,the problems occur in low temperature economizer in practical engineering application,such as low temperature corrosion,abrasion,ash deposition and blockage,and vibration,are described,and the causes and main influence factors of these problems are analyzed.Moreover,the corresponding countermeasures are put forward,such as selecting materials with excellent low-temperature corrosion resistance to manufacture heat exchanger,reasonably designing the heating surface structure type,controlling the flue gas flow rate and metal wall temperature ofheating surface,installing soot blowing equipment,guide plate and shockproof partition,which effectively solves the problems of low-temperature corrosion,abrasion,ash deposition and blockage,and vibration existing in the flue gas waste heat utilization equipment.

关 键 词：低温省煤器 低温腐蚀 磨损 积灰 堵塞 振动 超低排放 烟气余热 

分 类 号：TK223.33[动力工程及工程热物理—动力机械及工程]