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- Title
Cleaning vessel walls by moving water jets: Simple models and supporting experiments.
- Authors
Bhagat, R. K.; Perera, A. M.; Wilson, D. I.
- Abstract
Impinging liquid jets are widely used in cleaning-in-place operations to remove product residues and soil layers from vessel walls. The model for adhesive removal of soiling layers by coherent impinging w ater jets presented by Wilson et al. (2014, Chem. Eng. Sci., Vol. 109, 183-196) is revisited and is applied to a series of cases related to tank and vessel cleaning, including the case of a strong (hard to remove) soil; the case where the jet strikes the well at an oblique angle; and where the point of jet impact moves across the surface. A subset of the results shows good agreement with new and previously published experimental data. A new analysis is presented for calculating the shape of the region cleared of soil by the point of jet impact moving around, or up and down a surface, which allows the resources (time, liquid, and energy) required to clean a cylindrical vessel to be estimated. Selected je t paths and nozzle motion patterns are compared ;n a case study which illustrates the potential fer designing a cleaning programme. The models make several simplifications and theoretical developments required to generate more accurate results are identified.
- Subjects
WATER jets; ADHESIVES; MATHEMATICAL models; NOZZLES; HYDRAULIC engineering
- Publication
Food & Bioproducts Processing: Transactions of the Institution of Chemical Engineers Part C, 2017, Vol 102, p31
- ISSN
0960-3085
- Publication type
Article
- DOI
10.1016/j.fbp.2016.11.011