How to address the problem of dilute sulfuric acid corrosion in carbon steel towers?
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Tower parameters: Design pressure 0.35； Design temperature 260℃ ； Shell material: Q245R ； The medium is quench water (containing 5% dilute sulfuric acid) + other process gases ； Inner diameter of the tower: 1400 ； The tower is 22 meters tall. May I ask: How can this device address the issue of corrosion caused by dilute sulfuric acid?
Is there a specific plan? For example, what kind of paint to use and how to apply it? How thick should it be brushed? ......
A quench tower that appears to be for exhaust gas recovery. Stainless steel composite panel is used
The design temperature is 260°C; I’m not sure what the operating temperature is If the operating temperature is low, it is more economical to use acid-resistant structural adhesives for corrosion protection; when the operating temperature is high, material selection becomes quite difficult, and appropriate materials can be chosen in accordance with API 581.
Operating temperature: 240°C; lining is not allowed
Can stainless steel resist corrosion by dilute sulfuric acid? ?
What process is mentioned above? Is there a PFD process flow? Something seems off; at an operating temperature of 240°C, the saturated vapor pressure of water is 3.3 MPa. When operating at a design pressure of 0.35 MPa, a large amount of water in 5% dilute sulfuric acid will also evaporate. Furthermore, in sulfuric acid with a concentration of 75% or less, the lower the concentration, the greater the corrosivity; the higher the temperature, the greater the corrosivity. According to API 581, even the B-2 alloy, which has the highest resistance to sulfuric acid corrosion, cannot withstand it.
Hehe, only the gaseous phase was considered, and sulfuric acid was ignored. It’s rare to find material that can resist sulfuric acid corrosion at such high temperatures! The analysis on the 10th floor makes sense.