Hydrochloric acid mist treatment
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Hello everyone! I would like to ask how acid mist from hydrochloric acid storage tanks is handled. Are there any PID diagrams available? If a spray tower is used, how often should the water contained in it be replaced? Are there any specific guidelines for this, and how is it monitored? Thank you all!
Can’t we add a plastic breathing valve?
Look at the pH value; 6.5 to 7.0 is sufficient
The pressure of the storage tank is controlled through positive and negative water seals; it is not emptied directly, with attention paid to maintaining the liquid level and preventing freezing.
It is advisable to add a single-suction valve as a safeguard in case the negative pressure water seal fails, as large fiberglass tanks can easily be deflated.
For the entire washing tower, conductivity is monitored; if it rises too high, the liquid is sent to the hydrochloric acid reaction tank
Add a small absorption tower; use a pump for circulation of the absorbent. It is better to use an alkaline absorbent, though water can also be used. The volume of the bottom of the tower should be around 1-2 cubic meters. The frequency of replacing the alkaline substance depends on its pH value, but its concentration should not be too high – around 5% is sufficient; otherwise crystallization is likely to occur