Problem of sodium carbonate content in alkali
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Experts, what are the reasons for the high content of sodium carbonate in sodium hydroxide (32% caustic)? How can this issue be resolved to address the excessive level of sodium carbonate? Please, experts, have a discussion!
Take a good look at the cooling issue of the discharged tank alkali. I feel it’s a problem with poor cooling.
The temperature was checked and found to be between 30~40°C.
1. The brine does not remove carbon or does so poorly.
There are only two ways in which sodium carbonate can be formed: one is by adding it during the refinement of brine; the other is through a reaction between sodium hydroxide and carbon dioxide in the air. The poster should carefully examine the process flow; doing so should help identify the cause, after which appropriate measures can be taken.
Excessive sodium carbonate levels in the alkali is a serious issue that requires proper handling. In my opinion, there are three reasons for this: 1. The control of the excessive alkalinity of sodium carbonate in the brine used in the first purification step is too strict； 2. The decarburization effect in the pure water treatment process is poor. 3. The alkaline solution comes into contact with carbon dioxide in the intermediate tank and the finished product tank, as well as in the air
Check the carbonate content in the pure water
This post was last edited by Yinozhang on 2010-6-15 at 14:39. 1. Check whether there are any issues with your sampling and analysis methods. 2. Check whether there are any problems with your storage methods.
It’s probably due to carbonates in pure water. It is recommended that the pure water section turn on the decarburization fan and observe for a few days
According to the analysis results, the findings from the factory and those from external laboratories are largely consistent. The 32% alkali obtained through electrolysis is stored in tanks after cooling; these tanks are lined with stainless steel. There are aerial ports at the top. There is no decarburization device for saline entering the electrolyzer