An anti-corrosion optimization design for an HCL heater
Thread Content
This post was last edited by wiseboy on 2022-6-21 08:18. No extra words – just check the file:
Perfluoroethylene has poor thermal conductivity, and its heat resistance generally does not exceed 180°C – can it be used in environments with such high temperatures?
This post was last edited by wiseboy on 2022-6-20 at 12:58. It is precisely because of the poor thermal conductivity that its area is so much larger than that of precious metal heat exchangers! (1) The area of the precious metal heat exchanger is 15 m2, with a weight of 276 kg. (2) The area of the PTFE heat exchanger is 231 m2, with a weight of 482 kg. However, we calculate the price based on weight in tons. PTFE heat exchangers are much cheaper. I won’t mention the specific price.
There was a problem with the first upload, so it has been uploaded again.
I would like to ask what are the maximum pressure and temperature limits for tetrafluoroethylene heat exchangers? In my understanding (which is somewhat limited), a shell-and-tube heat exchanger with a surface area of 15 square meters should not be cheaper than ones made of PTFE. I would appreciate it if the original poster could provide more information on heat exchangers made of PTFE, such as their cost structure and suitable application conditions
The last edit to this post was made by wiseboy on 2022-6-22 at 12:33, with the following reply: 1. Thanks to its scientific design, PTFE heat exchangers can be manufactured within acceptable shell diameter ranges; their price is several times, or even a dozen times, lower than that of precious metals. However, due to their poor heat transfer efficiency, the required shell diameter is much larger. As long as it does not exceed the maximum size permitted for manufacturing. 2. There are several types of tetrafluoroethylene; generally, they can withstand temperatures up to 250°C, and it is recommended for long-term use
Choosing graphite heat exchangers for hydrochloric acid heat exchange or gaseous hydrogen chloride heat exchange processes is an excellent choice.
It is possible to choose silicon carbide tube heat exchangers with higher heat transfer efficiency; by reducing the heat transfer area, even though the unit cost may increase, the same heat transfer objectives can still be achieved, with a significantly smaller volume as well
This post was last edited by wiseboy on 2022-7-8 at 16:27. Whether it’s graphite or silicon carbide, either can be used; precious metals are still employed by some people as well. But I am a designer; I don’t hold subjective opinions. I simply optimize for the user based on the actual situation, relying on data to make decisions. You can’t choose graphite, silicon carbide, PTFE, and precious metals all at once for a single heat exchanger, right?
Tetrafluoroethylene? The normal PTFE has a maximum operating temperature of no more than 100°C after prolonged use, with a peak of 140°C at most; you must be using modified and reinforced PTFE, which can withstand temperatures up to 200°C℃
For tetrafluoroethylene heat exchangers, there are **standards** – do I still need to answer questions about potential issues?