Regarding the coke oven suction issue
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During recent measurements of the upward airflow suction in our factory, we encountered some interesting issues. Specifically, the suction at the top of the regenerator was -35 Pa, while it was -50 Pa at the location of the grate bricks. I really can’t understand why the suction at the top of the regenerator is lower than that at the grate bricks under the influence of upward airflow. Does this mean that the upward airflow should actually move downward? We would appreciate it if everyone could share their opinions, and perhaps conduct experiments in our factory to figure out what’s going on
The suction at the top of the rising gas regenerator is -35 Pa, while the suction at the grate bricks is -50 Pa; these values are correct. In fact, the flow of upward air currents is driven by buoyancy, which is related to the temperature of the air currents; the higher the temperature, the greater the buoyancy. In the airflow of our coke ovens, it is buoyancy that overcomes the resistance of the airflow and the pressure difference of the rising air, thereby pushing the gas and air into the combustion system. If you have time, go and read ＜Coke Oven Heating and Regulation＞ written by Yan Wenfu, and you’ll understand.
I just don’t quite understand how a gas can go from being at rest and at the same pressure as the atmospheric pressure to having a strong suction force, before that force gradually decreases. I really can’t figure it out