The coke cake is not evenly matured – the upper part remains raw. How can this be adjusted?
Thread Content
3246D two-part side-fed ramming coke oven… The coke cakes do not mature evenly; the upper part is undercooked while the lower part is overcooked… How to adjust this?
Heating with blast furnace gas or coke oven gas? Adjustment of high-direction heating for coke oven gas: 1. Reduce the air excess coefficient. 2. Reduce the burner orifice diameter; with the flow rate remaining unchanged, increase the pressure in the machine-furnace branch pipe to enhance the gas injection force. 3. Enriched gas depletion (generally not achievable). 4. Raise the height of the gas outlet. 5. Length of the commutation cycle (30 minutes provides better heating of the upper part of the focal cake compared to 20 minutes). Adjustment of high-altitude heating for blast furnace gas: 1. Reduce the air excess coefficient. 2. Adjust the inclined chute tiles to improve the exit distance and angle between the gas and air. 3. Change the height of the nose bridge brick. 4. Reduce the mixing ratio. 5. Length of the commutation cycle (30 minutes provides better heating of the upper part of the focal cake compared to 20 minutes). , This post was last edited by 26722672 on 2009-2-7 18:29 ]
Hello! It is heated by coke oven gas…
Adjusting the air excess factor is primarily used
The main consideration is to lengthen the flame length and slow down the burning rate.
The key issue with this problem is the poor vertical heating uniformity; the solution is to lengthen the combustion flame! !
In short, to improve vertical heating, it’s no longer possible to do so by altering the furnace design or its structural layout; this can only be achieved by improving the flame of the heating gas and by appropriately reducing the air excess factor
In one sentence: Regulate the flame in the vertical flue. (Stretch it out)
An appropriate increase in air volume should be considered to raise the flame.
It’s not advisable to do this on the upper floor; increasing the amount of air only allows the gas to burn more completely at the bottom of the flame channel, resulting in a shorter flame length and thus a greater temperature difference between the upper and lower areas
The key is to change the upward heating; there are various methods for adjustment, such as the excess coefficient, suction force, pressure of the heating gas, and dilution of the heating gas. It depends on your actual situation. .
The heating is uneven in the vertical direction; adjust the flue suction and gas pressure, and regularly check whether the flame is elongating
The main issue is the high upward flow; this can be addressed by reducing the air excess factor, replacing the orifice plates, and increasing the pressure. Methanol is also added to a portion of the vent gas