Design issues of the piping connecting the distillation tower and heat exchangers
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The outlet pipe of the distillation tower is connected to the heat exchanger; if the centers of the tower and the heat exchanger are on the same horizontal line, that is, if the connecting pipe has only one 90-degree elbow, is that acceptable? The gas temperature in the tower reaches up to 100 degrees, and it operates on a batch basis. The temperature is not constant. Is it necessary to keep a certain distance between the tower and the heat exchanger? Should an additional elbow be added, and needs to thermal expansion and contraction be taken into account? The pipe is made of 304 material, with a diameter of dn200.
There should be no problem; our distillation towers are all installed in this way. The temperature is slightly lower, at 57 degrees. A 100-degree medium isn’t considered too high either. As for thermal expansion and contraction, I think a elbow will be more than sufficient.
For thermal pipelines such as steam and condensate, thermal expansion and contraction need to be taken into account. If your operating temperature is 100°C, a 90-degree elbow is likely not sufficient
The poster should post this in the piping section; this falls under the category of piping stress, and it’s best to conduct stress calculations
It is best to conduct stress calculations; regardless of the material used, if the height of the tower is large, thermal expansion and contraction will be significant. A temperature of 100 degrees at the top of the tower is not low, so it is advisable to calculate whether expansion joints are needed
100°C is not too high; the thermal expansion of the pipes is not significant, so it doesn’t need to be considered. It is the heat expansion of the tower that needs to be taken into account
If the pipe temperature does not exceed 200 degrees, or it is at a high temperature but the pipe diameter is no more than 4\", thermal expansion and contraction are generally not a concern.
The tower is 10 meters tall. The horizontal distance between the tower and the heat exchanger is designed to be 2.8 meters. Vertical height: the distance from the tower outlet to the heat exchanger inlet is 1 meter, and the heat exchanger is 2 meters above the ground. A quick calculation shows that if the 2.8 meters remains unchanged, the vertical height should be around 1.7 meters; such a height is too high and unacceptable. What should I do?