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在热处理过程中,除了提高被加热产品的质量以外,如何提高产品加热过程的经济性问题具有很大的意义。目前,在复循环气流的热处理炉中,由于二次空气流股能量的限制,要达到金属加热均匀度为±5—15℃,而它的空气消耗系数已达到α=2～3,甚至更多,这将降低加热的经济性。减少供入炉膛的二次空气量,避免被加热金属质量恶化,是进一步完善复循环热处理炉结构的根本任务。相当大部份的热处理炉都是带半敞焰式燃烧室的炉子,这种结构通常用于燃煤气和重油的工作炉(重油为后备燃料)。对这种
In the heat treatment process, in addition to improving the quality of the product being heated, it is of great significance to improve the economics of the product heating process. At present, due to the limitation of the energy of the secondary air stream in the heat treatment furnace of the re-circulation gas flow, the uniformity of heating of the metal is ± 5-15 ° C., and its air consumption coefficient has reached α = 2-3, or even more This will reduce the heating economy. Reduce the amount of secondary air supplied to the furnace, to avoid deterioration of the quality of the metal being heated, is to further improve the complex circulating heat treatment furnace structure of the fundamental task. A substantial portion of the heat treatment furnaces are furnaces with semi-open flame chambers, which are commonly used for gas-fired and heavy oil furnaces where heavy oil is a backup fuel. Right for this