CIRCULATION AND SCRAPE-OFF TYPE CRYSTALLIZER FOR FORMING CRYSTALS FROM LIQUID TO BE TREATED

摘要

PROBLEM TO BE SOLVED: To provide a circulation and scrape-off type crystallizer for forming chrystals from a liquid to be treated capable of largely growing crystals while preventing the abrasion, crushing or the like of crystals and capable of reducing fine crystals.;SOLUTION: The circulation and scrape-off type crystallizer for forming crystals from a liquid to be treated is equipped with a crystallizing tank 6, a draft tube 7, an outside rotary blade 8, scrape-off blades 9 rotated around a peripheral wall shaft to scrape off the crystals adhering to the inner surface 3A of a peripheral wall 3 and a revolution suppressing plate 10 for the liquid P to be treated extending from a bottom material 4 toward the peripheral wall shaft. An inside rotary blade 12 for promoting the liquid P to be treated toward the revolution suppressing plate 10 is provided to the inside lower end part of the draft tube 7.;COPYRIGHT: (C)2004,JPO