Relationship between suction difference and flow rate
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Simply put, the suction difference is proportional to the square of the flow rate. If the suction force at the top due to upward airflow is 40 Pa and that due to downward airflow is 70 Pa, the difference in suction force is 30 Pa. Now, if the suction force is adjusted to 30 Pa for upward airflow and 60 Pa for downward airflow, the difference in suction force remains 30 Pa. Does this result in any change in the amount of air that enters? Is it still the same amount? What are the effects on the combustion system of the coke oven before and after the change?
After adjustment, the amount of air entering through the dampers remained essentially unchanged, but the negative pressure throughout the system decreased relatively, resulting in a reduction in the amount of air that leaks into the combustion system from various sources. The positive pressure at the top of the furnace increased relatively
Is the suction difference between descending and ascending air currents constant? If so, what would happen if the downward airflow was adjusted to 30 Pa? Has there been any change in the amount of air entering through the air damper?
I don’t understand, that’s why I’ve come to ask the experts like you for advice. Tell me, what will happen if the downward airflow is set to 30Pa? What is the change in the amount of air entering through the air damper?
I’m in a lower grade, and I was just thinking that if the suction force of the downward-flowing air decreases while the amount of air entering the combustion system remains unchanged, then adjusting the suction force can only be done by adjusting the pressure at the viewing ports. In that case, wouldn’t adjusting the flue dampers also have no effect on the amount of air?