I can’t understand why, in the stripper feed heat exchanger, the cold fluid flows through the tube side entering from above and exiting from below, while the product at the bottom of the tower flows through the shell side entering from below and exiting from above
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I can’t understand why, in the stripper feed heat exchanger, the cold fluid flows through the tube side entering from above and exiting from below, while the product at the bottom of the tower flows through the shell side entering from below and exiting from above
Which specific device? Please explain clearly so that the issue can be resolved.
This post was last edited by ylb913 on 2018-8-4 at 12:30. The cold medium enters from the top and exits from the bottom, while the hot medium enters from the bottom and exits from the top; this whole setup is reversed. I’ve seen a furnace equipped with a heat exchanger that uses co-current heat transfer (one tube side); the cold medium enters at the front end and exits at the rear end, supposedly to prevent overheating at the inlet of the heat exchanger. I agree with this!
The semi-regenerative catalytic reforming unit, the pre-hydrogenation unit, the stripper feed heat exchanger – everything was done backwards. I’ve been working in this field for years, and this completely overturned my understanding of things; it was designed by our design institute
I was wrong; to correct that, it’s semi-regenerative catalytic reforming, with a pre-hydrogenation followed by a fractional distillation system, as well as a stripping tower feed heat exchanger. The material coming out of the bottom of the product separation tank flows through the tube side at 40°, while the material at the bottom of the tower flows through the shell side, entering from above and exiting from below. I think the heat exchange efficiency is best when the material flows through the tube side
I can only say, painting! Wrong! Done!
For heat exchangers, the principle is that the hot fluid enters from above and exits from below, while the cold fluid enters from below and exits from above. As for the flow direction of the fluids within the tubes and the shell, there have not been strict rules regarding this, and there is a lot of flexibility in the design. What you said makes sense, but there’s no need to worry too much about it.
Well, it was designed by the design institute, so there must be a reason for it. Thank you