漳泽发电厂670t／h锅炉受热面超温爆管试验研究

对漳泽发电厂4台原苏制锅炉调节受热面、高温过热器和高温再热器超温变形、爆管、泄漏等原因进行了分析，指出炉内燃烧组织不佳、燃烧中心上移、沿炉膛宽度和高度存在较大的热偏差、炉膛出口折焰角太小、高温受热面积灰严重、制粉系统三次风连接管路不合理等是造成高温受热面超温爆管主要原因。通过燃烧优化调整试验，严格控制炉膛出口烟温，减小沿炉膛出口宽度方向的热偏差，并对系统进行适当改进后，有效地解决了受热面超温泄漏的发生，锅炉运行的安全性大大提高。

TEST AND STUDY ON OVERTEMPERATURE TUBEBURST OF HEATING SURFACE FOR 670t/h BOILER IN ZHANGZE POWER PLANT

Causes leading to overtemperature deformation and tubeburst leakage of adjusting heating surface, hightemperature superheater, and hightemperature reheater in four boilers made from former Soviet Uninion in Zhangze Power Plant have been analysed, pointing out the main causes resulting in overtemperature tubeburst of hightemperature heating surface, such as faulty organization of combustion in the furnce, shiftup of combustion centre, comparatively large heat deviation along width and height of the furnace, too small outlet furnace arch, serious ash deposition on hightemperature heating surface, and unreasonable connection of tertiaryair pipelines in pulverized coal preparation system etc.. Through combustion optimization adjusting test, strictly control outlet flue gas temperature of the furnace, reducing heat deviation along outlet of the furnace, and properly retrofitting the system, the overtemperature leakage of heating surface has been effectively restrained, greatly enhancing safety of boiler operation.