Calculations for the neutralization reaction between sulfuric acid and sodium hydroxide
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I need the help of experts. I study mechanical engineering and have forgotten all my high school chemistry knowledge. Currently, my company has a problem that needs to be solved. The actual acid content in the water used to dissolve sodium sulfate is 5.9 g/L. Sodium sulfate is separated from the acid bath by a centrifugal dehydrator; its acid content ranges from 0.6% to 0.8%, and the daily production volume is between 130 and 160 tons. The hot water added for dissolution is around 60 degrees Celsius, at a rate of about 500 tons per day. Now it is necessary to prepare caustic soda at the appropriate concentration and add it drop by drop for neutralization. The question is what concentration is appropriate for mixing. It’s best to prepare and use it up within a day.
Wastewater treatment is not as simple as merely calculating the mass conservation in acid-base neutralization; even for this neutralization step, factors such as the mixing method and residence time must be taken into account, otherwise, even if the right amount of substances is available, insufficient mixing will result in unsuccessful neutralization. Meeting the exhaust standards also requires compliance with parameters such as heavy metals, ammonia nitrogen, and COD
For now, only consider neutralization for backend processing; sodium sulfate will be recovered
First, calculate how much acid there is, including the acid dissolved in water, and then calculate it based on the reaction equation. This is only theoretical; what was said on the second floor also needs to be taken into account.
Let the right person handle the right problem. That’s all; you’d better go back to working on machinery. I can’t provide an answer.
If only mass conservation is considered, the simplest approach is to purchase 40% industrial liquid caustic