Sodium bicarbonate recovery device and recovery method

摘要

PROBLEM TO BE SOLVED: To collect sodium hydrogen carbonate included in ground water.SOLUTION: Ground water is concentrated by an evaporation-type concentrator 4. The concentrated ground water is contacted with carbon dioxide by a carbon dioxide absorption-type crystallizer 5 and sodium hydrogen carbonate crystallizes and precipitates. Recovery percentage of the sodium hydrogen carbonate is raised by introducing carbon dioxide generated by the evaporation-type concentrator 4 into the concentrated ground water of the carbon dioxide absorption-type crystallizer 5.