| 摘要 |
<p>The present invention is such that, with H1 being the height from a slurry outlet 4 to a control liquid level S, H2 being the height from the control liquid level S to the top of a flash vessel 10, and D being the diameter of the flash vessel 10, 0.35D ‰¤ H1 ‰¤ 0.45D, and 0.75D ‰¤ H2 ‰¤ 0.85D, and at least one liquid level sensor 21 detects a slurry liquid surface 8 at a control liquid level S; when the liquid level sensor 21 detects a slurry liquid surface 8 which has risen, a slurry discharge valve 16 installed on a slurry discharge pipe 14 derived from the flash vessel 10 is opened; and when the liquid level sensor 21 detects a slurry liquid surface 8 which has fallen, the slurry discharge valve 16 is closed, whereby opening and closing of the valve is appropriately controlled thereby to reduce troubles with a steam discharge pipe, the slurry discharge pipe, and the slurry discharge valve.</p> |
