| 摘要 |
A hydraulic flocculation system having a first stage tank receiving a liquid through an elbow conduit having an upwardly directed outlet. Liquid from the first stage tank flows into a pair of second stage tanks through respective elbow conduits also having upwardly directed outlets. Liquid is discharged from each of the second stage tanks into a third stage tank through respective elbow conduits having an upwardly directed outlet. Each outlet of the conduits is covered by a plate which slidably receives a plurality of upstanding rods secured to the conduits so that the plate can move toward and away from the outlet as the flow through the conduit varies. The plate acts as a constant pressure-loss valve to produce a head loss which is proportional to the weight of the plate in order to maintain the G-factor of the system relatively constant as the flow rate of liquid through each of the conduits varies. The G-factor of each stage of the system can thus be adjusted as desired by varying the weight of each plate. Other constant pressure-loss valves may be employed in other embodiments including a plate pivotally connected along one edge of the conduit and resiliently biased against the outlet of the conduit.
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