For example, the Alfa Laval plate heat exchanger widely used in the sulfuric acid industry basically uses Hastelloy C276, and the boiler flue gas desulfurization tower uses 316L, which is corrosive. It should not be difficult to generalize. Possibly, Hastelloy C276 is used in order to avoid dilute acid corrosion; the acetic acid distillation tower has a certain temperature, 316L may be corroded, and G30 grade Hastelloy is used, such as Jiangsu Thorpe Group.

Graphite heat exchanger can be used. Therefore, it is recommended for key parts. Fluoroplastic heat exchanger is suitable for nitric acid, hydrochloric acid, sulfuric acid, acetic acid, phosphoric acid, hydrofluoric acid, aqua regia, chromic acid, organic acid, ammonium bifluoride, caustic soda, potassium hydride, chlorine (dry) chlorine (gas-liquid), inorganic Heating, cooling, evaporation, concentration and crushing of any solution in salt and electroplating surface treatment. Stainless steel is fine for acetic acid. If it is concentrated sulfuric acid dilution cooling, graphite sulfuric acid diluter can be used directly, which can dilute sulfuric acid and cool it to output below 45 degrees. For high-concentration sulfuric acid heat exchangers, the best is Kazakhstan Alloy (C-276). 

The acetic acid resistant material of the heat exchanger tube of the heat exchanger is best to use titanium or zirconium, but the production cost is higher. Answer 7: I think it can be based on the operating temperature and pressure of the heat exchanger, the temperature difference between the inside and outside of the heat exchange tube, and the nature of the fluid (what substance and concentration), according to the relevant standards, considering the material cost, processing cost, and service life, and comprehensive consideration Select materials. The performance of fluoroplastic heat exchanger: The heat exchanger material made of PFA, FEP, PVDF pipes is more excellent than polytetrafluoroethylene (PTFE) heat exchanger material, and has higher thermal stability, flexibility and resistance. 

First of all, the concentration and temperature of the acid must be clarified, so that the right material can be selected. Do you require both sulfuric acid and acetic acid resistance or separate requirements? Also, for sulfuric acid, it depends on the concentration and temperature

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