| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an operation method of an electric evaporation tank capable of efficiently discharging a concentrated treatment solution. <P>SOLUTION: In the operation method of an electric evaporation tank 10 into which graphite electrode rods 13 are inserted and which is provided with a discharge port 14 on a side wall, the treatment solution L is supplied to the electric evaporation tank 10, the treatment solution L is heated by energizing by the graphite electrode rods 13 to evaporate moisture to concentrate, the insertion volume of the graphite electrode rods 13 into the treatment solution L is rapidly increased and the treatment solution is rapidly heated, and the liquid level is raised to thereby discharge the treatment solution from the discharge port 14. The convection flow of the treatment solution occurs and the treatment solution of high concentration accumulated on the bottom of the electric evaporation tank is agitated. By raising the liquid level, the agitated treatment solution L can be discharged from the discharge port 14. <P>COPYRIGHT: (C)2013,JPO&INPIT |
