REACTING/CRYSTALLIZING METHOD AND APPARATUS THEREFOR

摘要

PROBLEM TO BE SOLVED: To provide a crystallizing/dephosphorizing method and apparatus therefor, by each of which the amount of agglomerated calcium phosphate to be generated can be reduced without altering the flow rate ratio of circulation water/the water to be treated. SOLUTION: When the water to be treated is introduced into a fluidized bed 14 from a pressure chamber 19 for the water to be treated through a jet nozzle 55 and a distributor 12 and circulation water is also introduced into the fluidized bed 14 through a pressure chamber 20 for the circulation water and the distributor 12, both of the water to be treated and the circulation water are mixed first with each other in a seed crystal of a fluidized state. Though the water to be treated has high phosphorus concentration and the circulation water has high Ca concentration and pH, the phosphorus in the water to be treated is crystallized on the surface of the seed crystal since they are mixed in the presence of the seed crystal. As a result, the amount of the agglomerated calcium phosphate to be generated can be reduced without altering the flow rate ratio of the circulation water/the water to be treated. COPYRIGHT: (C)2005,JPO&NCIPI