How to reduce flue gas temperature
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Current status: main flue 340, secondary flue 350, roof volume 1170, air inlets 200, actuators 2/5, space above the furnace 800. The temperature of the main flue was originally 320 degrees; it has now increased by 20 degrees for some reason. The nitrogen oxide levels are a bit high, and it seems that this is caused by the high temperature of the flues. I seek advice from experts; ideally, there should be a specific method for adjustment
Additionally, the suction force at the top is around 40 while it’s 70 at the bottom; the values for the machine’s performance are roughly the same in both cases
Has the coking time been reduced? The flue temperature must be high as well, right? Is there any leakage or downward flame flow in the furnace?
Add technical parameters such as furnace model for analysis purposes
The flue temperature remains unchanged. As for reducing the heat, I’ve only heard of it; I don’t really know what it entails. Could you explain that?
4.3-meter coke oven, dual lower injection, single heating mode; coke oven gas is used for combustion, which results in a bright yellow color; the temperature in the furnace is 800 degrees, and since there is no moisture entering the furnace, the standard temperature is 1325 degrees
Measure the resistance of the regenerative chamber to see if it is normal.
The increase in nitrogen oxides is likely not caused by high flue temperatures; at temperatures above 300 degrees, no more nitrogen oxides can be formed. Compare the temperature at the top of the stack with that of the smaller flues to the previous readings. If the temperature at the top of the stack remains unchanged while the temperature of the smaller flues is higher, it is possible to increase the air intake volume to lower the temperature of the grid bricks. If both temperatures are high, then reducing the suction force might help. This is for reference only