Is it better to use lime or soda ash to neutralize the dilute acid in sulfur?
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Friends of Sulfur Acid Making: Is it better to use lime or soda ash to neutralize the acid in sulfur? We have been using soda ash for neutralization, but after cleaning the molten sulfur tank, we found that the iron plate inside was severely corroded. It was honeycomb-shaped, and some places had been corroded and perforated. I wonder if it was acid corrosion or alkaline corrosion? The phenomenon seems to be alkaline corrosion. Can neutralization with lime prevent corrosion in the tank? Please enlighten me. Thank you.
I think that neutralizing liquid sulfur with lime is better than using soda ash. Neutralization with lime produces calcium sulfate, which can be removed during sulfur filtration.: The filtration removal effect should be better, and the lime should be less corrosive. Soda ash can also be used to neutralize the acidity, but the generated sodium sulfate is difficult to crystallize and is more difficult to remove in the liquid flow than calcium sulfate. I once used soda ash to neutralize the liquid flow in a company for three years. The boiler tubes became clogged twice. The clogs were all white inorganic salts. I thought it was sodium sulfate. It may also be that the filtering effect is not very good, but the analysis results are all qualified.
2# 13506356269 The melting point of sodium sulfate is lower than that of calcium sulfate.
It is better to use lime because the CaSO4 precipitate formed is easy to remove and economical.
3# What is the use of the low melting point of sodium sulfate? It is also higher than the temperature of the sulfur furnace, and the temperature at the boiler inlet is lower.
6# 13506356269 Is the melting point of anhydrous sodium sulfate higher than the temperature of the sulfur furnace? :dizzy: The melting point of anhydrous sodium sulfate is over 800 degrees, which can easily cause blockage of fire tube boilers.
7# Snap your fingers and you are right. What I am talking about is that sodium sulfate blocks the fire tube of the fire tube boiler. So it is better to use lime.
Thank you, friends. We only considered this when we discovered that the boiler fire tube was blocked and the resistance increased. Thank you for pointing out the direction.
Please ask everyone: Will using lime cause the heating coil to scale?
To be honest, everyone thinks that limestone is very light, which produces a lot of solid impurities, and the filter often needs to remove impurities, which is very troublesome. The acidity of sulfur seems to be mainly due to the presence of sulfuric acid. Calcium sulfate is generated when liquid sulfur is present.