| 摘要 |
PROBLEM TO BE SOLVED: To separate a solid by keeping a vacuum state in a separation means of a solid separation apparatus. SOLUTION: In constitution such that a solid-containing liquid is supplied into the separation means 2 from a supply port to be separated into a liquid and a solid under a heating and vacuum condition and the solid is discharged from a solid discharge port T2, a solid recovery passage 7 is connected to the solid discharge port T2, and a first airtight valve 10, a first accumulation part 15 and a second airtight valve 13 are provided successively from the solid discharge port T2 and, in such a state that the first airtight valve 10 is opened and the second airtight valve 13 is closed, the solid discharged from the separation means 2 is recovered through the solid recovery passage 7 through a process for supplying the solid to the first accumulation part 15 held to a vacuum state, a process closing the first airtight valve 10 to bring the first accumulation part 15 where the soild is present to an atmospheric pressure state and a process opening the second airtight valve 13 in such a state that the first airtight valve 10 is closed to discharge the solid in the first accumulation part 15.
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