【Secondary brine】What is the basic principle of decarburization equipment?
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【Secondary brine】What is the basic principle of decarburization equipment? Our process is: Salt → Acid ↓ Secondary brine from the resin tower → Decarburization tower → (Air release) into the decarburization cooler → Decarburization vacuum pump → (Liquid) into the liquid seal tank → Brine storage tank
Acidify to lower the pH value, then blow with air to remove CO2. There may be requirements for the CO2 content in chlorine gas; otherwise, a decarburization process is not necessary.
Does lowering PH facilitate CO2 release?
This post was last edited by Du Xiaoping on 2015-9-30 at 13:10. During the purification of brine, sodium carbonate (soda ash) is generally used to remove calcium; an excess of sodium carbonate is required to eliminate calcium ions completely. As a result, CO32- ions are present in the brine system, and these ions react with hydrochloric acid to produce CO2 gas. This CO2 gas is not desired, which is why some companies – including the person who posted this question – implement decarboxylation processes for this very reason.
Is the purpose of the cooler then to reduce the solubility of CO2 in saltwater?
No, the purpose of a cooler is to condense water vapor into water, so that it does not get drawn into the atmosphere during vacuuming. Additionally, the solubility of ordinary gases such as carbon dioxide in water is extremely low.
In the case of chlorine, the chlorine extracted using a vacuum pump can either be recycled or sent to waste gas systems for treatment. So what is the purpose of using vacuum units for CO2?
The purpose of evacuating air is to reduce the vapor pressure of the gases to be removed. As we all know, water boils more easily at higher altitudes; this is because the air pressure is lower there, which lowers the boiling point of water. The same principle applies whether it’s chlorine or carbon dioxide； Secondly, an external force is applied to increase the gas flow rate, making it much faster than the natural flow rate; this relates to the issue of efficiency.
It seems that the company in question uses decarbonization equipment; could you share the specific contents of various components in the chlorine gas?