【Weekly Topic】Does the change in the quench chamber liquid level affect the lockhopper temperature? How does it affect? (As usual, post 1...
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This post was last edited by pyp222 on 2017-8-20 at 20:41. Having seen many posts discussing whether there is a connection between changes in the liquid level in the quench chamber and the temperature of the lockhopper, my opinion on this issue is that, to be honest, there isn’t really a significant connection between the two. The heat absorbed from the high-temperature gas at the area where the quench chamber’s liquid level is highest is transferred through thermal conduction; the water located slightly higher up in the quench chamber is discharged via the black water pipelines, while the water at the bottom is circulated using the lockhopper pump. Since the discharge of black water not only removes the black water itself but also takes away heat, the amount of black water discharged should have an impact on the heat conducted to the bottom. This principle should not be hard to understand. Therefore, I believe that the level of the quench chamber liquid has no direct impact on the temperature of the lock hopper; it is rather the amount of black water discharged from the vaporization furnace that has a direct effect. From another perspective, however, the lower the amount of black water discharged, the higher the liquid level in the gasifier, which can also lead to an increase in the temperature of the lockhopper. Therefore, the relationship between the liquid level in the gasifier and the temperature of the lockhopper is established through the amount of black water discharged. The above are some of my personal views. I wonder if everyone also has their own opinions on this issue; please share your insights so we can discuss it together.
Agreed; the level of the quench chamber liquid does not necessarily affect the temperature of the lock hopper
From the perspective of the hopper slag accumulation, I think that with a low liquid level in the quenching chamber, the temperature in the hopper should be high. Since the quenching chamber is not tightly sealed, it cools both the syngas and the ash; a low liquid level results in a shorter quenching time. At the same time, a low liquid level causes the temperature of the water used for quenching to be higher, resulting in a small temperature difference between the ash and the quenching water, and thus less driving force for heat transfer from the ash to the quenching water. Together, these two factors result in a high temperature of the ash entering the lockhopper, as well as a high overall temperature of the lockhopper itself!
A low liquid level results in a short quenching time, which causes the temperature of the quenching water in the quenching chamber to be high