How is the air volume of a fan calculated?
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At present, our company has a project for producing hydrogen from gas; the gas obtained after hydrogen production is used for heating coke ovens. For safety reasons, it is necessary to ventilate the basements of these coke ovens. Our company plans to use ventilation by installing a fan at each end and intermediate platform of the coke oven. Here comes the question: under such circumstances, how should the air volume of the fan be calculated? What relevant parameters are needed? I ask the powerful ones to answer! !
Good question! Firstly, a suggestion is that it is best not to use exhaust methods; instead, a positive-pressure basement, that is, a system for forcing air in, can be employed. Because the suction process draws in hot air, dust, and other substances from areas such as the regenerator corridors into the basement. The Nippon Steel M-type coke ovens should use a positive-pressure basement design, and the German 7.63-meter coke ovens should also be of positive pressure type. Regarding the air volume, values are generally based on experience; you can refer to the specifications for coke-making process design to see if there are any specific requirements provided !
I have done this before as well; it was calculated based on the size of the basement. As mentioned above, blowing air into the basement yields better results than extracting air from it. I can give you our relevant documents for reference next Monday
Are there any relevant specifications or standards? It would be best to have calculation methods and criteria available for everyone to learn from together!* Thank you!
It would be great if there are any relevant materials; thanks for sharing! !
I’ll send you our fan model for your reference; it works well for us. We use a 72-hole, 5.5m ramming coke oven. Centrifugal fan, model B4-72-10D, rotation direction 270 degrees to the right, flow rate 26775–37476 cubic meters per hour, power 18.5 KW
This post was last edited by bao li on 2015-8-30 08:22. Are there two sets of fans per furnace? Are the fans placed on the end platforms and intermediate platforms? ? Some leaders suggested placing it in the basement, but I think that could pose safety risks. I’m not sure what you’ve done regarding this… As for the calculation of air volume, I’m not sure how it’s determined based on the area of the basement; are there any relevant parameters or formulas? ?
It is recommended to use a system of two stations with one for extraction and one for delivery, which yields significant results. If there are many holes and the basement is long, an additional unit should be installed in the middle; all three units should be of the same model, with one set on each side of the focal point.
Each furnace has two extensions, one placed at each end station and one at each intermediate station, one on each side of the furnace
A 5.5-meter ramming coke oven with 60 chambers, where the distance between the centers of the chambers is 1350. Each coke oven is equipped with two ventilation fans; these fans are located on the second-floor platforms at both the end and intermediate sections of the oven, and the air is delivered to the basement through specialized pipes (fiberglass pipes). The power of each fan is 18.5 KW, with an air flow rate of 25,000–30,000 cubic meters per hour.
The axial flow fans are located in the basement, and air is drawn outside through exhaust ducts; please visit the relevant coking plant to see them.