Influence of pre-dewatering on the success of cake washing

Brückner, Andreas; Sprott, Thomas; Peuker, Urs A.; Hoffner, Bernhard

doi:10.1080/01496395.2022.2082980

Cited by 5 publications

(1 citation statement)

References 25 publications

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“…The washing curves can be seen in Figure 7 in gray dashed (ethanol) and solid (water) lines. These curves are far from the ideal curves as they are given in dedicated contributions [74,75]. However, with both washing liquids, it is possible to reduce the content of sucrose in the pores.…”

Section: Washingmentioning

confidence: 94%

Small-Scale Solids Production Plant with Cooling Crystallization, Washing, and Drying in a Modular, Continuous Plant

Höving,

Schmidt,

Peters

et al. 2023

Processes

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Small-scale continuous apparatuses for solid product manufacturing are receiving increasing interest due to the demand for the fast market availability of specialty chemical products manufactured in integrated and modular processing plants. Relevant unit operations span from crystallization over solid–liquid separation and filter cake washing to drying. For this purpose, the quasi-continuous filter belt crystallizer (QCFBC) was developed and is presented here. The newly integrated unit operations with positive pressure filtration (Δpmax = 0.8 bar), filter cake washing (V˙wash = 55 mL·min−1), and convection drying (Tdry = 60 °C) have been individually characterized and integrated into the filter apparatus that has been modified for continuous operation. They were synchronized with the flexible cooling crystallization, enabling for a seamless production process. Sucrose in water was used as model substance system. Long-term operations of up to 14 h were successfully performed with dry product filter cakes (22.64 g ± 1.64 g·h−1) of constant quality attributes (x50,3 = 216.095 ± 14.766, span = 0.347 ± 0.109, Yrel. = 69.9% ± 5%, XRM = 1.64 mg·g−1 ± 1.38 mg·g−1).

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Section: Washingmentioning

confidence: 94%

Small-Scale Solids Production Plant with Cooling Crystallization, Washing, and Drying in a Modular, Continuous Plant

Höving,

Schmidt,

Peters

et al. 2023

Processes

View full text Add to dashboard Cite

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Displacement Washing of Filter Cakes With a Fine Particle Top Layer

Sauer,

Löwer,

Henn

et al. 2024

Chem Eng & Technol

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Displacement washing of filter cakes is a critical process in various filtration applications and the presence of a top layer of fine particles from preceding cake filtration may influence washing efficiency. To investigate the effect of such a top layer on the displacement washing process, filter cakes with solid volume fractions ranging from 15 % to 33 % are formed from crushed, irregularly shaped limestone particles of about 10 to 250 µm to minimize or induce segregation effects due to sedimentation superimposed on cake filtration. The structural properties of the filter cakes are measured using X‐ray microscopy and dynamic image analysis. To predict the influence of cake structure on displacement washing, an advection–dispersion model is employed. Comparison between prediction and experimental data shows good agreement, highlighting the impact of cake structure on washing efficiency and providing valuable insights for optimizing displacement washing processes in industrial applications.

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