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根据模化理论,针对某大型高炉煤气双蓄热式环形加热炉,按照10∶1的比例建立了实物模型。根据二维PIV测试技术的原理,用高速摄像仪对各加热段炉膛进行示踪粒子拍摄和速度分布测量。研究发现从烧嘴喷出的气流,一般不会从正对的第一个吸风口吸出,越靠近均热段的喷口气流越不容易被最近的排烟口排出,从而延长了炉气在炉内的停留时间,避免了烟气短路;炉膛截面速度变化较大,距离烧嘴口越远,截面上速度越平缓;在一定的气流喷射角度下,喷嘴口两侧有气流旋涡产生;流量越大,气流越容易到达对侧炉墙。
According to the mold theory, for a large blast furnace gas double regenerative ring furnace, in accordance with the ratio of 10: 1 to establish a physical model. According to the principle of two-dimensional PIV test technology, the high speed camera was used to measure the particle tracing and velocity distribution of the furnace in each heating zone. The study found that the jet of air from the burner is generally not sucked out from the first air inlet directly opposite to the air outlet of the soaking zone. The closer the gas flow to the outlet of the soaking zone is, the less it is easily discharged by the nearest outlet. Within the residence time, to avoid short-circuit smoke; furnace section velocity changes larger, the farther away from the burner mouth, the cross-section of the more gentle; in a certain degree of jet angle, the nozzle orifice on both sides of the air flow vortex flow; Large, easy to reach the opposite side of the furnace wall airflow.