The coke cake is high and the temperature in the furnace roof area is low – what’s the reason?
Thread Content
The standard temperature remains unchanged; a coal cake height of 5200 is acceptable. The moisture level tested is within acceptable limits. The volatile matter content of coke should be between 1.1 and 1.4. Now, the thickness of the coke cake produced is 200 mm higher than before, and the temperature in the furnace roof area is low, at 770–780°C. I’m not sure whether this is due to poor contraction or something else; I’d appreciate some advice.
Coal cake: 5.2 meters. The height of the coke discharge port is 20 centimeters higher than before. The temperature in the furnace roof area is also low.
More coal is loaded, which results in more heat absorption; especially when the coal pile is high, more heat is absorbed at the top. It’s inevitable that the temperature in the space above the furnace will decrease
The coal loading amount remains unchanged, at 5.2 meters. Are there any other reasons?
This is inevitable; besides, 770-780 falls within the normal range. We’re working hard to bring it down to around 800!
A furnace top space temperature between 750 and 850 is acceptable; it is best to keep it within the range of 750–800. I have a question: if the height of your coal cakes remains unchanged, how can the coking degree be higher than normal?
The temperature in the furnace roof area is 770–780°C, and it needs to be controlled very carefully. This temperature should actually correspond to that of the raw coal gas; however, due to the thermal radiation from the furnace walls and coke, the measured value is higher than the actual value. Therefore, it is reasonable to control it at the lower limit. The height of the coal cake remains unchanged, but the height of the coke cake increases; this can only be attributed to poor shrinkage properties.
Thank you. You appear frequently on the forum, and I often keep an eye on you.