METHOD AND APPARATUS FOR TREATING AN INORGANIC SALT-CONTAINING WASTE LIQUID

摘要

PURPOSE: A method and an apparatus for treating an inorganic salt-containing waste liquid are provided to collect high quality acid and alkali at a low cost by sufficiently removing impurities from an inorganic salt contained wasted solution. CONSTITUTION: A pre-processing unit(11) includes a filter within a wasted solution, and performs a filtering operation or neutralization operation for the filter. A crystallization unit(12) crystallizes the wasted solution. A salt separating unit(13) separates extracted inorganic salt from a remaining solution. A dissolving chamber(14) generates the solution of the separated inorganic salt. A concentrating unit(15) concentrates the generated remaining solution, and the concentrated remaining solution is supplied to the crystallization unit again.