Blast furnace temperature control: direct temperature and temperature difference reversal
Thread Content
6-meter top-mounted coke oven: air damper value 130..140, suction force 205..220; the difference in suction force between the top and bottom sections is around 10 Pa. The value on the machine side is 80, while it’s 83 on the coke side. What could be the problem? Please advise
Please send the detailed information, including the cross-flow temperature, air excess coefficient, etc., so that I can help you analyze it
The new coke ovens have been in operation for half a year; the coking time is 24 hours. The standard temperatures are 1150–1200 degrees, while the actual values are 1168–1196 degrees. The air coefficient is 1.3. Some technicians say that the distribution of gas flow is uneven and that it’s necessary to adjust the suction force at the top; I’m not sure if this is correct, nor do I know how to make such adjustments
Is there any expert here? Could you provide a detailed analysis? Thank you
Top-mounted coke oven or rammed coke oven? What is the taper of the carbonization chamber?
Top-mounted new coke oven, 6 meters long, with a 55-degree slope
The suction force at the top of the reservoir differs by too much. This is a JN60 coke oven. I have done experiments. The suction force measured by the machine and the focal point is 75–80; the difference is only five. It works very well.
Also, the opening degree of the air damper is a bit large; previously we had large damper openings that resulted in high suction force, and this was changed during the optimization efforts. 22. The time it takes to establish a connection is currently 110:120; the suction force is only around 180. It also saves gas flow. It’s only 8,000 right now
These days, flue chambers with temperature difference are very rare. Thank you! We have new coke ovens; there is severe blasting in the basement, along with backfire, and the chimney emits black smoke
The blasting is caused by a loose cock valve in the basement, or loose connections at the branch pipes; the T-joints also need to be checked. Additionally, the exchange travel time can also be adjusted as appropriate. The idle exhaust gas time and exchange time after gas exchange can be appropriately extended. If smoke is coming from the chimney, the main cause is not a suction issue but rather leaks in the new furnace body. Hand it over for heat treatment. It will get better in a while once there is graphite available
The blasting is caused by a loose cock valve in the basement, or loose connections at the branch pipes; the T-joints also need to be checked. Additionally, the exchange travel time can also be adjusted as appropriate. The idle exhaust gas time and exchange time after gas exchange can be appropriately extended. If smoke is coming from the chimney, the main cause is not a suction issue but rather leaks in the new furnace body. Most likely, the initial grouting and patching steps were not done properly. Hand it over for heat treatment. It will get better in a while once there is graphite available.