华电技术 ›› 2015, Vol. 37 ›› Issue (3): 18-21.

• 研究与开发 • 上一篇    下一篇

锅炉回转式空气预热器防堵技术研究

  

  1. (华电国际电力股份有限公司技术服务中心,济南〓250014)
  • 出版日期:2015-03-25 发布日期:2015-05-14

Study on blockage prevention technology for rotative air preheater of boiler

  1. (Huadian International Technique Service Center, Jinan 250014, China)
  • Online:2015-03-25 Published:2015-05-14

摘要: 摘要:大容量火电机组回转式空气预热器积灰、堵塞情况十分严重,空气预热器换热效率降低、通风阻力增大,严重时还会导致机组被迫降出力。通过研究空气预热器的积灰堵塞机理,提出了优化氨逃逸测量系统、优化喷氨系统运行方式、改造吹灰系统并优化吹灰运行方式、优化暖风器运行方式以及低温受热面采用耐腐蚀材料等预防措施,确保机组安全、经济运行。

关键词: 关键词:空气预热器, 积灰, 堵塞, 脱硝, 氨逃逸, 吹灰, 低温腐蚀

Abstract: Abstract:There were serious ash deposition and blockage in the rotative air preheater of large thermal power units, and the heat exchange efficiency of the air preheater was reduced, the ventilation resistance was increased. In extreme case, the unit may be compelled to reduce the output. Based on research of the mechanisms of the ash deposition and the blockage of the air preheater, some preventive measures were proposed, which include to optimize the ammonia escape measurement system, to optimize the operation mode of the ammonia injection system, to reform the soot blowing system, to optimize operation mode of the soot blowing system, to optimize operation mode of steam air heater, to adopt corrosionresistant material for the lowtemperature heating surface and so on. The safe and economical operation of the unit was ensured.

Key words: Keywords:air preheater, ash deposition, blockage, denitration, ammonia escape, soot blowing, lowtemperature corrosion