Flow wetting

Washing experiments have been conducted on a pilot-scale rayon washing line that employs the rain-pan technique of gravity-flow wetting. In this system, precision-drilled, stainless-steel pans are used to "rain" measured quantities of solutions onto a batt of cotton. The batt is conveyed by a perforated stainless-... 

In applications such as the preparation of tableting feeds and the manufacture of detergent powders, the aim is to produce small agglomerates (usually 2 mm diameter and less) with improved flow, wetting, dispersing or dissolution properties. This is accomplished by superficially wetting the feed powder, often with less than 5% of bridging liquid in the form of a... 

The samples for on-line analysis were taken through a polysulfone membrane [37]. The seven channel automatic analyzer system consisted of six air-segmented continuous flow-wet chemical analyzers (Skalar analytics) to measure the concentration of ammonia with ion selective electrode (Philips IS-570), phosphate with ammonium molybdate at 880 nm, reducing sugar with pHBAH at 410 nm, methionine with Na-nitroprusside at 505 nm, cephalosporin C with... 

O. Shell side of microporous hollow fiber module for solvent extraction Na, = V[dha-)/L]N%N°s M Nsh- D Nlt = K = overall mass-transfer coefficient (3 = 5.8 for hydrophobic membrane. (3 = 6.1 for hydrophilic membrane. [E] Use with logarithmic mean concentration difference. dh = hydraulic diameter 4 x cross-sectional area of flow wetted perimeter (p = packing fraction of shell side. L = module length. Based on area of contact according to inside or outside diameter of tubes depending on location of interface between aqueous and organic phases. Can also be applied to gas-liquid systems with liquid on shell side. [118]... 

Tg and fp are invariants of geometry and physical properties. For other geometries the general formula (16.39) holds, but the characteristic length is replaced by a hydraulic diameter de= 4 x (cross-sectional area for flow) / (wetted perimeter). 

Crawford J., Moreno L., and Neretnieks I., Determination of the flow-wetted surface in fractured media, J. Contaminant Hydrology, 61, p 361-369, 2003... 

Moreno, L., and Neretnieks, I., 1993. Flow and nuclide transport in fractured media The importance of the flow-wetted surface. Journal of Contaminant Hydrology, 13 49-71. Neretnieks, I., 1980. Diffusion in the rock matrix An important factor in radionuclide retention. Journal of Geophysical Research, 85 4379-4397. 

X cross-sectional area of flow wetted perimeter cp = packing fraction of shell side. 

No deposit can exist without a surface but there is no shortage of surfaces in a paper machine approach flow, wet-end and dyer section. Indeed thousands of square meters exist. 

Screw conveyor dryers have hollow shafts or flights through which the heated gas flows. The trough that carries the material is similarly heated. The free-flowing wet feed is transported and dried as it is conveyed to the exit. It is especially well suited as a supplemental dryer for an existing dryer. 

Features Fonns tough, glossy, water-resist, films at R.T. provides good flow, wetting, and pigment grinding... 

Figure 11.10 Effect of CO partial pressure on the hydrogen flux obtained with a CRI-Criterion Pd membrane. During this period, the total gas flow (wet basis) was held constant at 794 SLPH. The CO/CO2 ratio was changed. This was done while holding all other flows, temperature (430 °C), pressure constant (30 barg).

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