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保证超临界燃油锅炉下辐射区的安全运行依然是当前一个重大问题。在水冷壁管表面发生的剧烈腐蚀过程可以认为是水冷壁管局部破损的主要因素。不管炉内燃烧过程组织的方法如何,只要使水冷壁外壁平均温度低于500～520℃这个水平就可有效地防止其腐蚀。最近,科研机关、锅炉制造厂和电厂运行部门一起制定并采取了一系列结构上和运行上的措施来降低水冷壁管壁温度至上述要求的范围。这些措施的要点在于降低热负荷、强化传热过程、防止管内产生氧化铁沉积物并定期进行清洗、采用较薄的合金钢管等等。采取以上这些措施后,锅炉在稳定工况下运行时,根据测量和运行观察大
It is still a major issue to ensure the safe operation of the radiation area under the supercritical oil-fired boiler. The severe corrosion process on the surface of the water-cooled tube can be considered as the main factor of the local damage of the water-cooled tube. Regardless of the method of organizing the furnace combustion process, as long as the outer wall of the water wall temperature below 500 ~ 520 ℃ this level can effectively prevent corrosion. Recently, research institutes, boiler manufacturers and power plant operation departments have developed and adopted a series of structural and operational measures to reduce the wall temperature of water wall to the above requirements. The key points of these measures are to reduce the heat load, strengthen the heat transfer process, to prevent the production of iron oxide deposits in the pipe and to conduct regular cleaning, the use of thinner alloy steel pipe and so on. Taking these measures, the boiler operating under steady conditions, according to the observation and operation of large observation