给水加氧处理对过热器高温氧化皮生成影响的试验研究  

INFLUENCE OF ADDING OXYGEN INTO FEED-WATER TREATMENT UPON HIGH-TEMPERATURE OXIDE SKIN FORMED IN THE SUPERHEATOR

作　　者：张广文 孙本达[2] 张金升 顾庆华[3] 蔡井刚 

机构地区：[1]神华国华(北京)电力研究院,北京100025 [2]西安热工研究院有限公司,陕西西安710032 [3]国华太仓发电有限责任公司,江苏太仓215433

出　　处：《热力发电》2012年第1期31-33,共3页Thermal Power Generation

摘　　要：以某超临界660MW机组为例进行了给水加氧处理试验,测量比对加氧前后过热器氧化皮的生长速率,并对氧化皮结构、成分的变化进行分析。结果表明,给水加氧处理并未加快T23和T91材质过热器氧化皮的生成速度及促进其脱落,但对TP347H材质的过热器,加氧处理具有促进其氧化皮剥离的作用。因此,采用给水加氧处理的关键是控制机组起、停时的温度以抑制加氧后不锈钢氧化皮的大量脱落。A test of adding oxygen into feed- water 600 MW unti. Through measuring the growth rate treatment has been carried out on one supercritical of oxide skin formed in the superheater,as well as analysing the micro - structure and the variation of composition in the said oxide skin,it shows that the adding oxygen into feed - water treatment hadn＇t quickened the growth rate of oxide skin formed in the superheaters made from T23 and T91 steel materials,and hadn＇t promoted the fall- off of said ox- ide skin,however,in superheater made from TPa47H steel, the adding oxygen into feed -water treat- ment boasts effect to promote the peel - off of oxide skin,where as the key of control is controlling the temperature during start- up and shutdown of unit, therefore,in the process of using the above- men- tioned treatment to inhibit corrosion of the superheater, the most crucial problem is to control the fall - off of oxide skin in vast amount from stainless steel tubes after using the adding oxygen treatment.

关 键 词：超临界 660 MW机组 加氧处理 过热器 不锈钢 氧化皮 高温氧化 

分 类 号：TM621.8[电气工程—电力系统及自动化]