Application 1: Measurement of turbidity (T1) at centrifuge oulet.
The turbidity sensor (T1) registers the concentration of total solids in the feeded product. The discharge frequency will raise in case of high inlet concentration. This will raise the time requirement as well as the product losses. The measurement signal can be used to control the speed of the feed pump (P). The speed of the feed pump will be decreased in case of high concentration and increased in case of low concentration. The 3- way valve (V1) will return the feeded product to a settling or flotation tank in case of extreme high concentration.
Application 2: Measurement of turbidity (T2) at centrifuge inlet.
The turbidity sensor (T2) registers the concentration of total solids inside the centrate at separator outlet. The centrifuge will be discharged in case of increasing turbidity.
Application 3: Centrifuge bypass (dosage)
A constant centrate concentration is required for some special applications. Therefore an amount of the feeded liquid is injected into the clear centrate. The flowrate in the bypass is controlled by proportional valve (V2). A PID- controller compares the concentration measured by turbidity sensor (T2) with an application specific setpoint. The flow rate will be increased in case of to low concentration and deceased in case of to high concentration.
Application 4: Measurement of turbidity (T3) at centrifuge in centrifuge dicharge pipe.
The turbidity sensor (T3) registers the concentration of total solids inside the concentrated liquid at centrifuge dicharge pipe. The signal can be used to control the 3- way valve (V3). The concentrated liquid will be wasted or recycled depending on concentration.
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