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本文论证了Stelco第6号和第7号焦炉燃烧室物理模型是能够定性地决定火焰的位置及高度的,模型表明燃烧室中控制燃烧的流动条件受到空气流动状态的强烈影响,尤其是和连接蓄热室和空气喷口的倾斜上升道有关。在6号焦炉燃烧室中空气流量分二部分供入,此时煤气流被从下空气喷口出流的倾斜空气射流吸至燃烧室的一侧,在7号炉燃烧室中,所有空气是从一个庭部喷口进入燃烧室的,由于倾斜空气流引起燃烧室中再循环气流,它控制着化学当量混合火焰的高度,同样可以看到,从煤气喷口底部通过一个小圆孔进入的煤气实际上是一个限制射流;它造成在喷口中的再循环促进了煤气高温裂解的可能性。 应用模型来决定“火焰”的高度及位置,和从正在加热的燃烧室拍摄的照片大致相符,但正如所预期的那样,实际火焰约比根据模型化学当量混合浓度预测的火焰要高1.35至1.5倍,通过模型预测的火焰高度和测得的焦碳VTD结果相符较好,尤其对6号焦炉是如此。还应用模型研究了6号和7号焦炉燃烧室改变操作后的效果,其中包括在6号焦炉中采用改变气流的装置如转向砖,煤气喷口延伸管以及空气喷口角部盖板以及减少7号燃烧室的过剩O_2等,模型试验表明只有采用延伸管能有效地使火焰在6号焦炉燃烧室下半部分布更均匀,而对7号炉来说采用5％过剩O_2将获得同?
This paper demonstrates that the physical model of Stelco’s No.6 and No.7 coke oven combustor is capable of qualitatively determining the position and height of the flame. The model shows that the flow conditions governing the combustion in the combustion chamber are strongly influenced by the state of air flow, and in particular The connection of the regenerator to the inclined ramp of the air vents. In the No. 6 coke oven combustion chamber the air flow is divided into two parts, at which point the flow of gas is drawn by the stream of oblique air from the lower air jet to the side of the combustion chamber, where all the air is From the vent of a chamber into the combustion chamber, which controls the height of the stoichiometric mixture flame due to the recirculating gas flow in the combustion chamber due to the sloping airstream, it can also be seen that the gas entering through a small hole at the bottom of the gas spout actually It is a restricted jet; it causes recirculation in the spout to promote the possibility of pyrolysis of the gas. Applying the model to determine the “flame” height and position roughly agrees with the picture taken from the heating chamber, but as expected, the actual flame is about 1.35 to 1.5 higher than the flame predicted from the model stoichiometric mixture concentration The flame height predicted by the model is in good agreement with the measured coke VTD results, especially for No. 6 coke oven. The model 6 and 7 coke oven combustor change operations were also studied using models that included varying the gas flow in the No. 6 coke oven, such as steering bricks, gas nozzle extension tubes, and air nozzle corner caps, as well as reducing Excess O 2 in No.7 combustion chamber. The model tests show that only the extension tube can effectively make the flame more evenly distributed in the lower half of the No. 6 coke oven combustion chamber, while for No.7 furnace the excess O 2 will be obtained ?