What material should be used for the plate heat exchangers in chlorine water systems?
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Are there any heat exchangers for chlorine water that are not lined with titanium and yet are inexpensive and corrosion-resistant? Thank you.
What is the concentration? Materials such as double-phase steel could be considered; it depends mainly on your required concentration. The cheapest option is 2003, which is a bit more expensive than 316
Fluoroplastics can be considered, as they are resistant to corrosion.
Well, you need to specify the medium conditions and operational requirements.
Materials for plate heat exchangers: TA2 provides the best titanium lining effect, and its price is not high either; the price of titanium has dropped!
Plate heat exchangers can only use TA1, while shell-and-tube heat exchangers can use TA2
I believe that when selecting materials for use in a chlorine water medium, one cannot consider only the corrosivity of the medium; factors such as the temperature and pressure of the medium, as well as the properties of the cooling medium, also play a role. If the pressure is only 1–2 bar, why can’t composite materials be used? If the pressure is high and the temperature exceeds around 150°C, taking the concentration factor into account as well, titanium is the only suitable material
Titanium is used; titanium is generally chosen for chlorine coolers.
There certainly are, such as composite materials, duplex stainless steel, and steel-lined fluoroplastics. The choice depends on your operating conditions; your question isn’t comprehensive enough, so only a general answer can be given
For chlorine water plate heat exchangers, it is of course best to use titanium. Is fluoroplastic good at heat transfer? It is said that duplex steel 904L (00Cr20Ni25Mo4.5Cu) is resistant to corrosion by chlorine water, but is it cheap? It is also heavier than titanium materials.
We use titanium material; it’s just that the hanging pad isn’t good
Overall, titanium material combined with EPDM gaskets is still the best choice, with titanium linings and swivel flanges used for the connections. It has been in use for a relatively long time. The plates hardly corrode, the gaskets are relatively inexpensive, and replacing them during overhauls does not cost much. I heard that there are now special fluorine gaskets available; they cost more than EPDM by over 20 times, and I haven’t used them yet. It’s too expensive. Do the padding and talk to friends about it.