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I used to think that in double-chamber coke ovens, there are no circulation holes between the 1st and 2nd chambers, but there are circulation holes between the 2nd and 3rd chambers, and also between the 4th and 5th chambers... We are currently building a coke oven here, and I suddenly noticed that there are circulation holes connecting the 2nd, 3rd, and 4th chambers. Why is that?
I don’t know what type of coke oven you have? Where was it designed? This is called a quad-flame channel, and it is mainly designed in the burner area; the same applies to the side facing the fuel. Not only are there loop holes between 2, 3, and 4, with no loop hole left between 1 and 2, but there are also crossing holes between 1, 2, 3, and 4. This is mainly to address the issue of low temperature at the burner tip, which is caused by significant heat loss there.
Some JN coke ovens have a pair of burners, while others do not. Pairs within 3 and 4 are present; 2 and 3 below 4.3 meters should be absent. Could you tell me more in detail about what type of furnace you have? I’m learning about it.
It should be a 5552D type coke oven; this is the situation here.
Your furnace must be a 6-meter one; this type of structure is called a four-cycle side-flue structure. That is, an exhaust gas circulation hole is added below the partition wall between the two burners 2 and 3 on the sides of the combustion chamber, while the exhaust gas circulation hole between burners 1 and 2 is removed. Most of the 6-meter coke ovens designed in our country adopt a four-pass structure for the side channels. During the heating process of the coke oven, when Channel 1 rises while Channel 2 descends, some waste gas enters Channel 3, thereby reducing the downward resistance of Channel 2 ； When 2 burners are in the upward mode and 1 burner is in the downward mode, some of the exhaust gas from the 3rd burner enters the 2nd burner, which effectively lengthens the combustion flame in the 2nd burner and helps to increase the temperature of the 1st burner. The four-circuit structure of the peripheral flue channels can reduce the temperature difference between the 1st and 2nd flue channels at the periphery of the combustion chamber.
Thank you to the person above; I’ve learned something :)! 5# shaoyang1986
The interior features a dual-flue design, while the edges have a quad-flue design. It’s the serpentine heating mentioned in some preliminary designs
While studying seriously*, which coking plant is that?
In the dual-flue design, each pair of flues is equipped with circulation holes to facilitate the circulation of exhaust gases. In order to increase the temperature of the burner head and reduce heat loss, no circulation holes are provided between flue 1 and flue 2
The points mentioned on the 2nd and 5th floors are very good; this type is a four-flue arrangement, also known as an S-flue design. In China, this method was first adopted in Wuhan Iron and Steel Group’s furnaces No. 7 and No. 8, with the aim of raising the temperature at the furnace tip and improving the maturity of the coke there.
I see, so I’ve learned this. What would be the effect if furnaces with a capacity of 4.3 or 5.5 were built in the same way?