Can’t increase the evaporation concentration of caustic soda? What are the reasons?
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Lye evaporation is carried out using a three-effect counter-current evaporator; why can’t the concentration be increased at present?
Reasons related to the device, reasons related to temperature. Many reasons. Check each one individually.
The higher the concentration of caustic soda, the greater the increase in boiling point. There could be two reasons why the concentration cannot be increased in a three-effect countercurrent system: one is that the area of the evaporator is insufficient, and the other is to try using a countercurrent configuration instead