Seeking advice on methods for regulating the temperature of coke ovens
Thread Content
My company’s coke ovens are of the 4 cubic meter type, with dual flues and negative heat regulation; each row of flues has 28 viewing holes, 14 of which lead to the machine side and 14 to the coke side. Currently, these ovens are heated using blast furnaces, and recently there have been temperature discrepancies – the temperatures are high at the ends, while the temperatures between holes 16 and 19 are low, with a temperature difference of up to 150 degrees. This situation has left me completely puzzled, and I’m unable to find a solution for now. I also ask for your guidance and assistance, dear seniors. I thank you in advance, sir.
Is this the case for the entire furnace, or only for individual combustion chambers? Generally, the temperature in the horizontal direction increases uniformly from the machine side to the furnace side; it should not be the case that the temperature is low in the central flame channel, and if such a situation occurs, it is merely an isolated incident. You can measure the following parameters to check whether they are reasonable: 1. Check whether the pressure at the burner holes is appropriate. 2. Are the air excess coefficients for each burner channel reasonable? 3. What is the suction power at the ceiling? 4. What is the resistance of grid bricks? 5. Are there any leakage or short-circuiting issues?
There’s definitely a problem with the suction force; blast furnace gas relies on suction force for proper operation. If the air distribution is uneven or insufficient, the combustion effect is poor, and the temperature cannot rise. Quickly check the suction force in all areas. Do not use the method of burning coke oven gas to burn blast furnace gas! ! ! !
It is necessary to check whether the bottom of the vertical flue is blocked, or whether the inclined duct is blocked, as well as for any leaks
If it’s a problem affecting the entire furnace, it’s definitely an issue with suction adjustment. You can try increasing the suction force on the coke side and reducing the opening degree of the air inlet; by adjusting the suction force while ensuring an adequate supply of air, you can make the furnace temperature drop a bit further into the coke oven. Based on what you’ve provided, add a little less on the machine side and make larger changes on the coke side.
Thank you for everyone’s opinions. You reminded me. Thank you.
This issue only indicates that the suction force of this row is lower.
First, it is necessary to measure the air excess coefficient for each burner channel. Generally, in a situation like yours, there are two possible scenarios: 1. If the air excess coefficient in the middle burner channel is high, it indicates that the suction force at the top of the regenerator is too high, resulting in more air in the middle burner channel and less air in the side burner channels. In this case, it is necessary to reduce the suction force in the flue and increase the opening degree of the air inlets. 2. If the air excess coefficient in the middle burner channel is low, it means that the suction force at the top of the regenerator is too low, leading to less air in the middle burner channel and more air in the side burner channels. Here, it is necessary to increase the suction force in the flue and decrease the opening degree of the air inlets. Please let me know if my analysis is incorrect
It must be a side effect of adjusting the coking time
If the air excess coefficient in the middle fire channel is too high, I think increasing the suction force would have the opposite effect, right?
Measure the suction at the top of the storage tank and check the pressure at the fire vent, then proceed with analysis and adjustments.