某电厂600MW超临界锅炉末级过热器壁温偏差的试验分析

Experimental Analysis of Final Superheater Tube Temperature Deviation of 600MW Supercritical Boiler

为了控制锅炉受热面氧化皮的生成速度,以某电厂600 MW超临界锅炉为例,电厂采取将主、再热汽温降低10℃的运行方式,正常运行过程中悬吊管与末级过热器存在较大的壁温偏差,加剧了电厂的运行风险,严重地影响了机组运行的经济性、安全性。针对电厂的运行情况,结合设计参数和电厂运行规程,通过燃烧优化调整,减小了悬吊管与末级过热器的壁温偏差,实现了锅炉的安全、经济、稳定运行。

This article takes the production of 600 MW supercritical boileras an example, which is designed by Shanghai Boiler Works Co. , Ltd. In order to control the rate of the boiler heating surface oxide scale formation, the power plant lower the temperature of main steam and reheat steam 10℃ compared to design operating mode, during normal operation, thetube of suspension and final superheaterthrough the wall there is a large temperature deviation, exacerbate the risk of unit operation and impact the economics of plant operationseriously. In connection withthe operation of power plant, combined power plant design parameters and operating procedures, through optimal adjustment of combustion, we had reduced the temperature deviation between thetube of suspension and final superheaterthrough the wall and realized the boiler safe, economical and stable operation.