Calculation of the liquid film thickness in the quenching ring
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I’ve seen several Texaco manufacturers change their original hole-patterned quenching rings to ring-shaped quenching rings. Does anyone know the specific reason for this change? I also wonder if any members have calculated the thickness of this liquid film; what determines this thickness?
The thickness of the liquid film is 6 millimeters. The thickness of the liquid film is related to the structure of the quenching ring and the pressure and flow rate of the quenching water. It’s mainly the former.
I would like to know more about this as well. Could someone please explain it in detail?
The last edit to this post was made by shanxg on 2009-9-1 at 22:50. We have not calculated the thickness of the liquid film, but we have heard from the design institute and teachers at Huali University that the thickness of the quenching water flowing inside the walls of the cooling tubes right after exiting the quenching ring is 5.2 MM.
In my opinion, the purpose of forming a liquid film is to protect the downcomer from the effects of high temperatures caused by the slag and syngas; therefore, the thickness of the liquid film should be related to the amount of slag, the volume of syngas, as well as the temperatures of both the slag and the syngas. Is it necessary to conduct heat transfer calculations for this?
I wonder if there are any people in the design field; I hope we can discuss this
I calculated it once; it’s roughly calculated in that way: that is, the difference between the volumes of the two cylinders. Treat the downcomer as having the volume of a cylinder, and consider the 6mm thick water film as having the volume of an annulus; calculate the volume of this annulus and convert it into tons of water. This value varies depending on the size of the furnace. I’m not sure if this is correct; I hope everyone can give me some advice! The teacher who has calculated or designed it could share their experience.
Cooling ring liquid film thickness: It should be the size of the gap in the cooling ring at the point where the cooling water exits that gap； Further down, the thickness increases a bit, and then gradually decreases.
Reply to 8# GSP: The result of your calculation should be the average value; the distribution of water is definitely not uniform
I just calculated ours; the thickness of the water film is 8 mm
Hehe! Is it necessary to calculate this? The hot state and the cold state are completely different; it’s better to use a piece of coal for washing than to work with this theory!