Pigment cake washing with consistent filtrate clarity
A membrane press with cake wash connections, specified around clarity and cross-batch cleanliness.
Background
A pigment producer needed even washing through the cake and a clean discharge between colours. Carry-over from the previous batch was causing off-spec product.
Duty conditions
Fine solids at 8–15 %, coloured, mildly acidic, 40–60 °C. Batch operation with frequent product changes.
Delivery scope
Press and plate supply, wash water connection design, cloth trial across three permeabilities, and discharge procedure.
What needed attention
Wash water distribution across the plate face and cloth change time were the limiting factors, not press pressure.
What carried over
For batch colour changes, plate and cloth handling time belongs in the specification alongside filtration area.
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Discuss a similar project
Send the duty and the constraints. We will come back with the model, plate and cloth combination and the points that need confirming.