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本文在燃烧空气动力学、流体力学的基础上,通过试验研究,提出用动量法则进行火床炉炉拱布置设计的近似计算方法。根据组织炉内空气动力工况的要求,该方法可以确定各拱出口气流动量与上升气流动量的合动量的大小、方向及其与前拱交点K的位置。经理论计算和试验结果综合提出,K点位置在前拱直段的4/5范围内、合动量与前拱直段的交角δ≥110°时,计算所确定的前拱相对高度b/L是适宜的。对已运行的锅炉,可按动量法则在既定的几何尺寸下,确定风室的配风比,使锅炉达到经济、安全的运行。
Based on the combustion aerodynamics and fluid mechanics, this paper puts forward an approximate calculation method of the furnace bed arch layout design based on the experimental study. According to the requirements of the aerodynamic conditions in the furnace, the method can determine the size and direction of the co-ordination and the intersection with the anterior arch of the arches at the outlet of each arch. The theoretical calculation and experimental results show that the K-point position is within 4/5 of the straight section of the anterior arch and the relative height of the anterior arch b / L Is suitable. On the boiler has been run, according to the law of momentum in the established geometry, determine the air chamber with the wind ratio, the boiler to achieve economic and safe operation.