Daily Question, April 6
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What should be the acidity level in the sulfur melting fast-melting tank? If the acidity is too high, what needs to be added? Why?
The temperature of the sulfur melting tank is generally maintained between 140 and 155°C； Soda ash, or quicklime powder or limestone powder, needs to be added to the sulfur melting tank to neutralize the acidity. The hardness of the sulfur slag is lowest when limestone powder is used, making it the easiest to clean; soda ash gives a slightly higher hardness ； The cost of adding soda ash is the highest, followed by that of adding quicklime; the cost of limestone powder is the lowest. However, the particle size control of limestone powder has a decisive impact on the ash content parameters of liquid sulfur.
The sulfuric acid concentration in the liquid is generally between 0.0025 and 0.005. Add lime or alkali
Reply to 1# I love chemical engineering: quicklime. Excessively high acidity can corrode equipment and pipelines (the stainless steel filters in coil heaters and liquid sulfur filters), causing severe corrosion that increases maintenance costs, shortens the service life of the equipment, and may even lead to serious corrosion of the boiler system.
Liquid sulfuric acid content: ≤20ppm. If the acidity is too high, adding soda ash or lime can lead to scaling
The acidity of the sulfur melting tank is kept at around 7; if the acidity is too high, lime needs to be added to neutralize it
The acidity should be kept around 7; if it is too high, lime needs to be added to neutralize it