Several questions regarding semi-jacketed containers
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1. Since the inner wall of the container is relatively thinner compared to the container itself, could half-pipe welding cause deformation or unevenness in the inner cylinder? 2. Are there any specifications or empirical data regarding the spacing between half-tubes? 3. Can parallelizing two to three and a half pipe steam inlets lead to a significant improvement in heat exchange efficiency?
This is the equipment we built last year; the jacket spacing required by the design institute can be used as a reference.
We have been manufacturing semi-tube reactors. 1. Generally, when the inner diameter is 6MM or more, there is no issue with deformation or unevenness. 2. The spacing between semi-tubes is determined based on the distance between each weld; usually, for spacings of less than 100, the distance is around 30mm, while for spacings over 100, it is 40–50mm. 3. When multiple semi-tubes are connected in parallel, the heating speed is definitely faster than that with a single semi-tube. The choice depends on the process requirements of your equipment.
Great experience sharing, thank you! More people are welcome to participate in forum discussions
Thank you, it’s very helpful; I’ve learned something! !
There are no standard requirements regarding the spacing between the half-tubes; we usually arrange them without any gaps, with the second layer overlapping the first one, so that the heat exchange area is as close as possible to that of a jacket
Parallel connection is basically useless on half-tubes, unless there are special requirements regarding local heat transfer; generally, multiple sets of inlets and outlets are used to control the length of the flow path per pass. Parallel connection is more commonly used in inner coils, in the form of double helices or multiple helices
I’m not sure if my understanding of parallel connection is the same as what the original poster means by it
In heat transfer calculations, what is generally calculated is the total amount of heat input, which is then converted into the heat transfer area. It seems that only heat field calculations can determine the layout of the inlet and outlet areas with such precision