| 摘要 |
<p>A apparatus comprises a first reverse osmosis membrane configured to filter seawater to separate seawater into desalted water and concentrated seawater, 5 and discharge the desalted water and the concentrated seawater, a second reverse osmosis membrane configured to filter the desalted water to remove boron, a first injection device configured to inject acid into a stage previous to the first reverse osmosis membrane, a second 10 injection device configured to inject alkali to a stage previous to the second reverse osmosis membrane, a first sensor configured to measure pH at an entrance of the first reverse osmosis membrane, a second sensor configured to measure pH at an entrance of the second reverse osmosis 15 membrane, and a controller configured to obtain values measured by the first sensor and the second sensor, receive a pH target value at the entrance of the first reverse osmosis membrane and a pH target value at the entrance of the second reverse osmosis membrane, and use a 20 transfer function from the acid injection to pH at the entrance of the first reverse osmosis membrane, a transfer function from the alkaline injection to pH at the entrance of the first reverse osmosis membrane, a transfer function from the acid injection to pH at the entrance of the 25 second reverse osmosis membrane, and a transfer function from the alkaline injection to pH at the entrance of the second reverse osmosis membrane, to control an injection 2749505_1 (GHMatters) P87647.AU 21/07/11 rate of the acid injected from the first injection device and an injection rate of the alkali injected from the second injection device. 2749505_1 (GHMatters) P87647.AU 21/07/11 a). c~cu cno a)0 I-D ca, C) a) 0 0-C X2' 0 C14 cu L() C) 2 ) - a) t C (D~~- -- - -a o IO II ) 0I D I ID I I,1 0 (</p> |
