Why is there a U-shaped bend in the steam condensate inlet to the heat exchanger?
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Is it to prevent steam from passing through the tube?
In a shell-and-tube heat exchanger, each tube is bent into a U-shape, with both the inlet and outlet of the tubes located on the same tube sheet. The interior of the head is divided into two chambers by a partition. In this way, the tube can stretch and contract freely, independent of the housing. This type of heat exchanger structure is suitable for high-temperature and high-pressure applications, but its main disadvantages are the difficulty in cleaning the tubes inside and the complexity of its manufacture.
That’s not what I meant; it’s that the pipeline running vertically into the heat exchanger has a U-shaped or S-shaped bend
Bends in steam pipes or hot pipes are mostly used to compensate for the thermal expansion of the pipes.
It is possible that it is to prevent steam from directly eroding the heat exchange tubes
It would be easier if a picture could be uploaded
It should be a liquid seal, to ensure that the flash vapor does not enter the heat exchanger.
It’s a liquid seal; the straight pipe should have a certain length.
You can check for yourself; if an expansion joint is installed in this pipeline, then it should serve as a water seal
It is a liquid seal, typically established under vacuum conditions. At normal pressure, it’s not necessary.
Due to cold installation, thermal operations, and pipeline expansion, thermal stresses are generated on the pipelines and equipment. Therefore, this design is typically employed to reduce damage.
Generally, considering the phenomenon of water hammer that occurs during steam use (when steam contains water, it impacts the walls of equipment at high speeds, resulting in extremely loud noises and vibrations; of course, this leads to damage to the equipment), it is necessary to remove the water from the steam before it reaches sections of narrower pipes (as liquid water is likely to form during such diameter changes). The U-shaped component is used, aside from accommodating thermal expansion and contraction, primarily to create a low point for water removal! ! By the way, if it is just for thermal expansion and contraction, large bends are generally made horizontally in the pipes. This post was last edited by unsj on 2009-3-30 18:23]