Four-nozzle surface variable-temperature LN forced cooling
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This post was last edited by rarellma on 2017-6-12 at 11:51. Our company requires that the flanges and vaults of the burner chamber not exceed certain temperature limits; forced cooling is strictly prohibited, and only process adjustments are allowed. Why is that? When other parts overheat, LN can be used for forced cooling
This post was last edited by rarellma on 2017-6-12 11:51. Yes, overheating; it was a typo
This post was last edited by pyp222 on 2017-6-12 at 12:48. Overheating of the furnace head flange is usually caused by air leakage in the flange, and using LN to reduce the temperature only provides a temporary solution rather than a permanent fix. On the contrary, it can also create safety hazards in the burner area. Therefore, when the temperature of the furnace head flange rises excessively, it is common to use LN for cooling, while simultaneously having a fitter use flame-resistant tools to tighten the flange heatally; this can help eliminate leaks if possible. If the leak cannot be resolved, it is best to shut down the machine, as once a leak occurs in the furnace head flange and cannot be fixed, the leak will worsen over time, increasing the safety risks in that area. The reasons for overheating in the dome and the cylinder are actually the same; it is usually caused by air leakage through the gaps in the refractory bricks. However, there are differences in their behavior during operation: the cylinder can accumulate slag, while it is more difficult for the dome to do so, or even impossible at all. When the cylinder overheats, the outer wall is cooled using LN to buy time; by adjusting the furnace temperature, slag formation on the cylinder can be induced in order to eliminate air leakage points, thereby resolving the issue of cylinder overheating. However, with vaults, it is difficult to handle the situation in this way, or even impossible to do so. In such cases, using LN to force a cooling effect is only a temporary solution; it merely leads to an increasing leakage of air through the gaps between the refractory bricks, making operations increasingly dangerous.
Actually, when the temperature of the dome or burner flange is high, if a strong wind blows against the gasifier frame, wouldn’t that also cause a drop in temperature? Is it really necessary to strictly prohibit strong winds from hitting the overheated areas?
What you’re referring to is a reduction in temperature due to the surrounding environment, but this pales in comparison to the forced cooling effect achieved by blowing low-pressure nitrogen at a distance of 7 kilograms. If the wind speed could truly exceed the flow rate of the nitrogen gas coming from the purge pipeline, then it would be an extremely high wind speed; under such conditions, safe production would likely not be possible.