Optimum Method of Evaporator Pot Liquid Heating and Cooling for Evaporator Cleaning and Recovery Program.

Kwon, K. C.

Technical Information Center Oak Ridge Tennessee

关键词: Evaporators;    Liquid wastes;    Radioactive waste processing;    Tanks;    Desalination;   

RP-ID  :  DE2001780127

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

The Savannah River Site Evaporators have run with limited operation problems for almost 40 years. In October 1999, one evaporator was shut down due to the inability to lift the concentrate solution from the pot. Visual inspection showed a significant buildup of solids on scale deposits on all of the exposed surfaces of the evaporator pot. A chemical cleaning flow-sheet to remove the scale deposits has been developed: (1) water soak of pot; (2) acid soak of pot; (3) transfer to neutralization tank; (4) transfer to receipt tank, and (5) repeat of Steps 2, 3, 4 as needed. Among these, Step (2) acid soak of pot is the most critical because the scale is slowly dissolved during this step.