| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a crystallizer used for a treatment method of depositing uranyl nitrate from nitric acid dissolved liquid of spent nuclear fuel, having structure where a liquid phase part inside a casing does not come in contact with bearing parts of a rotary inner cylinder, restriction of the material of the bearing part is mitigated as a result, the crystallizer therefore being excellent in acid resistance and sludge resistance, having high sealing property and being easy in maintenance. <P>SOLUTION: The crystallizer is provided in which a fixed inner wall is disposed in a protruded condition inwardly into a rotary inner cylinder through a lower end opening of the rotary inner cylinder provided in the casing, the lower end of the inner wall is fixed to the lower end of the casing, the liquid phase part of process liquid is formed between the casing inside and the rotary inner cylinder, and between the inside of the rotary inner cylinder and the fixed inner wall, while the upper end of the fixed inner wall is extended above the liquid level inside the casing, and an intermediate bearing is disposed between the fixed inner wall above the liquid level and the rotary inner cylinder inside. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
