Is there any way to remove chlorine from dilute sulfuric acid after chlor-alkali drying?
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It was sold as a by-product before 2017, and the dried dilute sulfuric acid is currently treated as hazardous waste. It requires a large investment. If the chlorine contained in the dilute sulfuric acid is removed, can it be sold as a product?
For dilute sulfuric acid, the country basically gives money to others.
Our company has a special dilute sulfuric acid dechlorination device, which uses compressed air bottom purging to control the free chlorine below 0.4g/l.
It is recommended to use vacuum concentration process to concentrate to about 95% for recycling. As long as there is saturated steam above 1.6MPA, if the operating cost is not more than 150 yuan/ton of dilute sulfuric acid based on the steam price of about 100 yuan, compared with the price of purchased sulfuric acid of about 300 yuan, it is economical. If you are interested, you can contact us at 18329131111
If the problem of waste chlorine absorption is not considered, you can use a blower to remove most of the chlorine.
How to recycle the blown chlorine gas?
Using a two-stage vacuum concentration process, under high vacuum, the boiling point of sulfuric acid drops to about 180 degrees Celsius, which can be achieved by using medium-pressure steam. If medium-pressure steam is not available, electric heating can be used. The picture below is a chlorine drying and dilute sulfuric acid concentration device that was put into operation at a chlor-alkali enterprise in Ningxia in September this year.