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1 存在的问题及原因 1.1 近年来,角管式管架热水锅炉在济南市特种锅炉厂一直作为主导产品,产品大部分销到我国西北地区。该型锅炉原设计前拱较低、后拱较短较高,后拱内敷设了两个规格的后拱管。后拱管内水的冷却作用使得后拱温度较低,起不到应有的高温辐射作用,加上受高原气候和煤质差、挥发分较低等因素影响,导致炉膛温度低,从而造成锅炉的脱火、着火困难、煤种适应性差、煤燃烧不完全等不良后果。
1 Existing problems and reasons 1.1 In recent years, the corner tube rack hot water boiler in Jinan City, special boiler plant has been as the leading product, most of the products are sold to the northwest of our country. The boiler design of the original lower arches, arches shorter high, the back arch within the laying of two specifications after the arch pipe. The cooling effect of the water in the back pipe makes the temperature of the back arch lower, which can not reach the due high temperature radiation effect. In addition, due to the influence of the plateau climate and poor coal quality and the low volatility, the temperature of the hearth is low, causing the boiler Of the fire, difficult to fire, coal poor adaptability, incomplete combustion of coal and other adverse consequences.