Experience and issues in the use of dilute sulfuric acid absorption towers
Thread Content
A project undertaken by our company involves using 1% dilute sulfuric acid at 100°C to absorb ammonia gas, with a design pressure of 0.5 bar. Due to the strong corrosive nature of sulfuric acid, 254 SMO stainless steel is used; however, special alloys such as Hastelloy are too expensive, and enamel linings are fragile. Finally, the tank body and purchased components are designed using 304 stainless steel with a 200-micron thick Halar coating. Although it can be used, in two projects that have already adopted it, one project encountered a problem where, after one year, the anti-corrosion layer on the tank’s interface was damaged, leading to cracks in the tank itself. Are there any more reliable methods that have been used? Have you tried pure fiberglass composite?
The most significant issue is the corrosion caused by dilute sulfuric acid at 100°C, and the tank manufacturing approach
Fiberglass can be used for anti-corrosion; feel free to contact me via private message if needed.
We examined a project that used fiberglass reinforced plastic; the joints there tended to age and become brittle, and they stopped working after less than two years. The thickest parts reached 20 mm in thickness, and the cost was also high. We’d like to know what the most cost-effective approach is
You can contact our technical staff; you can leave your phone number in the message system.
Only borosilicate glass is used; its price is much lower than that of alloy materials. As long as the glass remains intact, it can be used indefinitely. Glass is employed for sulfuric acid concentration both domestically and internationally. You can contact me by email at liuzhr@126.com
It was indeed used; it got damaged as soon as the goods were unloaded from the vehicle. I never used it again after that. Nowadays I work with fluoroplastic linings, but unfortunately problems can still occur
1%, with dilute sulfuric acid at 100 degrees Celsius, there is no problem using fiberglass. However, even a slight increase in temperature can affect its service life. Care should be taken in selecting the raw materials for fiberglass resin. Resins from different manufacturers and their grades all have an impact.
Dude, have you found a suitable material to use as a substitute? Our operating conditions are similar to yours; we use materials with a diameter of Q345 and a thickness of 16 mm