The effect of saltwater concentration on alkali concentration

We will encounter a situation where the saltwater concentration is below 300; for example, at 295, there will be a problem with the alkaline solution not meeting the standards (below 32%)

You are referring to the electrolyzers made by Beihua Machinery or Asahi Kasei, right! The saltwater concentration is 295 g/L, and the alkali solution concentration is below 32%. It’s not that it doesn’t matter, but the value isn’t very significant. First, what you need to know and consider is: 1 Why is it necessary to control the concentration of brine entering the tank and the circulation volume? What is the molecular weight of water molecules that penetrate from the anolyte to the cathode through the ion membrane? 2 What determines the concentration of the alkaline solution? Why control it at 32.05%±0.05%? Why is it the given circulation volume? 3 Does the difference in slot temperature at high and low current levels, along with the difference in gas-liquid ratios within the anode and cathode chambers, result in different amounts of moisture carried away by the gas phase? The amount of water from the anode that passes through the ion membrane to the cathode? There is a direct relationship between these. For the electrolyzers used in chlorine production, the concentration before entering the electrolyzer is 305±5 g/L, while the concentration of the anode solution after circulation is around 250 g/L. This is another way! !

If it is to operate for a long time, you can control the alkali concentration by adjusting the amount of pure water added； If the saltwater concentration decreases, but the flow rate of the saltwater doesn’t increase and the control on the cathode side doesn’t keep up, it will have an impact on the concentration of the alkali solution