Is it useful to use tetrafluoroethylene tubes for heat exchangers?
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If so, where are heat exchangers like this generally used? What raw materials are used? How large is the domestic consumption?
1. Tetrafluoropolymer tubes have extremely poor heat transfer properties and are, in principle, not suitable as heat exchange tubes. However, it has an extremely high corrosion resistance, and its price is much lower than that of some corrosion-resistant metal materials, such as titanium ； 2. When the heat transfer amount is not large, PTFE tubes can be used. This requires detailed thermodynamic calculations; for example, when using titanium heat exchange tubes, if the diameter of the heat exchanger shell is 1 meter, then by switching to PTFE heat exchange tubes, the shell diameter could reach 3 meters. 3. Among Them, there is a dedicated PTFE tube material, which allows for the calculation of heat transfer and process parameters for PTFE tube heat exchangers.
They are relatively rare nowadays; PTFE tubes have extremely poor heat transfer properties, unless specific application requirements exist.
Without using titanium, and in order to save money, I have been asked to design many heat exchangers with PTFE heat exchange tubes, all of which are considerably larger in size.
Thank you so much. Then may I ask in which fields are the PTFE tubes you have designed mainly used? Is F4 used extensively in heat exchangers in China? Is there any approximate estimate?
This post was last edited by wiseboy on 2012-6-21 at 14:21. The usage is very low; it’s all done by poor people on a small scale. It is generally used in acidic media, such as for heat exchange in hydrochloric acid and hydrofluoric acid, to replace titanium and thereby save on investment costs. If you want to promote it, you need to ensure that your F4 heat exchanger meets the heat exchange requirements; generally, when using F4 heat exchange tubes, their volume is much larger than that of metal tubes. Therefore, you need to do the heat transfer calculations properly—only then can the insurance meet the requirements, and will people use it.
Thank you very much for your valuable suggestions. We are engaged in market research, and our main task is to understand the usage of various products. An expert told us that almost all sulfuric acid plants in China use tetrafluoro heat exchangers; I wonder if this is indeed the case? Also, you mentioned using it in acidic media as a substitute for titanium, but isn’t titanium resistant to acids? How can it then be used as a substitute for titanium?
Titanium is not acid-resistant??????
http://bbs.hcbbs.com/thread-996956-1-1.html There’s already a discussion on this topic in the anti-corrosion version. . .
Hehe, I’m the one who posted this. Titanium has extremely poor corrosion resistance in hydrochloric acid and sulfuric acid free of oxidizing impurities; considering both the heat exchange efficiency and corrosion resistance, tantalum heat exchangers could be an option
This post was last edited by wiseboy on 2012-6-23 15:59. In the polysilicon industry, titanium is consistently used for HCL treatment. However, titanium’s corrosion resistance is conditional.