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Compaction under oscillatory shear and low normal pressure is an alternative method for mechanical deliquoring of compressible filter cakes. After the proof of concept on a laboratory scale, this article deals with the application of the process to an existing continuous vacuum belt filter. For this purpose, a modular device was developed for vibration compaction on an indexing horizontal vacuum belt filter (HVBF). It is shown that vibration compaction of an industrially relevant material on the HVBF reduces the initial residual moisture of 39.9% after cake formation by up to 10.5 percent points. Significant mechanical deliquoring of the filter cake can be reached by vibration compaction already after a short process time of 15 s. The experimental results on a pilot scale reveal that the process can be applied to an existing HVBF.

Vibration compaction of compressible filter cakes for mechanical deliquoring on a horizontal vacuum belt filter