Experimental and thermal analysis of washing the packed ice bed in wash columns

Qin, Frank G.F.; Min, Yang; Yang, Xiao Xi; Chen, Xiao; Abeynaike, Arjan

doi:10.1002/aic.11912

Cited by 12 publications

(2 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Effective ice removal and separation can be done in wash columns specifically developed for this purpose. Based on the mechanical ice transport there are two types of wash columns that are distinguished, namely, the hydraulic and the pistontype wash column [8]. These have a typical limit for troublefree operation with pure water production around 30-50 mm 2 s -1 viscosity (GEA experience, [9]).…”

Section: Freeze Concentration Introduction Andmentioning

confidence: 99%

Membrane‐Freeze Concentration Hybrid for Temperature‐Sensitive Biomolecules. Investigation, Application, and Techno‐Economic Benefits

Beek¹,

Budde

Esch³

2018

Chem Eng & Technol

View full text Add to dashboard Cite

In order to close the technology gap between membrane technologies and spray/freeze‐drying ideally with a technology that avoids thermal stress to sensitive enzyme solutions, the limits of freeze concentration for this application have been investigated. On laboratory scale it was found that average crystal sizes are > 300 µm despite high viscosity and ice separation is possible up to 42 % solids and > 1000 mm2s−1 viscosity. No activity loss was observed during concentration. A combination of two‐stage freeze concentration with a filter and wash column for ice liquid separation in an integrated setup with ultrafiltration has the greatest potential and was shown to be economically feasible in three out of four cases studied.

show abstract

Section: Freeze Concentration Introduction Andmentioning

confidence: 99%

Membrane‐Freeze Concentration Hybrid for Temperature‐Sensitive Biomolecules. Investigation, Application, and Techno‐Economic Benefits

Beek¹,

Budde

Esch³

2018

Chem Eng & Technol

View full text Add to dashboard Cite

show abstract

“…Many researchers work with washing as a chosen technology to clean the still-contaminated ice but have to live with the disadvantage of using the product and consequently losing it during this process step [6][7][8][9][10][11]. Another method would be centrifuging the ice mass, but because of the non-Darcy effect, the ice has to be crushed and heated at least to the point of melting in order to achieve the best separation of the salty solution and clean ice [12]. Pressing, thereby, can be a potentially better way, but it is technologically hard to realize within a continuously operating plant, especially for a possible melting product.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Two Different Designs of a Scraped Surface Crystallizer for Desalination Effect and Hydraulic and Thermodynamic Numbers

et al. 2020

View full text Add to dashboard Cite

The design of a desalination plant is most important if the desired product purity has to be as high as possible. This is also true for freeze crystallization plants. A correct solid-to-liquid ratio has to be ensured when pressing is used as a post-treatment. Thus, the dependence of the overall plant design on the achieved ice quality but also on different hydraulic and thermodynamic numbers is important. In this research, a scraped screw crystallizer plant is presented and examined for two different screw designs. Experiments with a low initial concentration, as for the usage to desalinate groundwater to gain it as process water, were conducted. Furthermore, solutions with high initial concentrations simulating seawater to produce potable water were used as another set of test solutions. The findings showed that neither of the screw designs is more favorable than the other, but it is important to have a plant design fitting the existing parameters on site.

show abstract