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Showing 1 to 14 of 14 for “"counter-current flow"”.
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A Mechanistic Model for Flooding in Vertical Tubes
In a counter-current two-phase flow system, flooding can be defined as the onset of flow reversal of the liquid component which results in an upward co-current flow. Flooding in the surge line of pressurized water reactors poses a significant technical challenge in the analysis of several …
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Effects of Variables on a Soaker-Stripper Reactor for Thermal Cracking of Deasphalted Oil
… of the 553 °C+ fraction over 50%. One important current challenge is to increase that conversion level by optimization of the reactor and the flow regime inside it. In this work, a pilot plant was designed, procured and built to investigate the thermal cracking of DAO with steam in a …
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Removal of metal ions from solution by foam fractionation methods
… foam stability and foam drainage, and the counter-current flow of liquid and foam. The experimental results obtained were tested with models proposed for the counter-current liquid-foam flow. It was found that the pattern of flow is different at low -s liquid flow from that at high flow …
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The treatment of a munitions manufacturing waste with lime, chlorine and permanganate
… the wastewater. The wastewater from the new counter-current flow TNT manufacturing process at the Radford Army Arsenal Plant, Radford, Virginia, was found to be treatable by excess lime addition alone or in combination with the oxidants chlorine and potassium permanganate. The excess lime …
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Dissolved air (pressure) flotation
… head of water in the saturator. A vertical flow type flotation unit was developed which provides a counter current flow regime and a stable interface between the clear liquid and rising agglomerates. The accumulated agglomerates discharge freely and without mechanical assistance at the top …
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Analysing aspects of the performance of an ironblast furnace
… its behaviour. This involved the simulation of a counter current compressible gas flow, through a packed bed, dealing with the momentum and thermal energy of both phases. Directional resistances were added to the gas momentum, so as to account for the interphase friction caused by the packed bed. …
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Chemistry at liquid-liquid interfaces: con- and counter-current extraction and biologically active membranes in microchannels
… of metal ions is studied. Traditionally, fluid flow of immiscible liquids is not stable and requires controlled microchannel geometries and flow rates. The stability of the liquid-liquid interface allows for exploration in varying flow profiles within the microchannel that could not be …
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Pollution prevention studies in the textile wet processing industry
… cotton dyeing and printing mill. Implementing counter-current flow between bleach washers will save $ 154,000 per year due to reduced consumption of water and energy. The savings will be $ 336,000 per year if the existing washers are replaced by more efficient washers. Improving the wash …
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Stability of Depletion Chamber Edges in Oil Sands Recovery Processes
… underlying physical mechanisms of heat transfer, flow, and potential instability remain unresolved given the interplay of phase behavior, oil mobilization, heat transfer (conductive and convective), multiphase counter-current flow, and potential instabilities in steam-only, solvent-steam, and …
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Modeling Sensible Heat Driven Direct Contact Membrane Distillation Treatment of Oilfield Produced Water
… for performance prediction of instantaneous and counter-current DCMD flow were developed. These algorithms used equation-based models of heat transfer, mass transfer, concentration polarization, and counter-current flow to predict performance of DCMD systems. The performance prediction model was …
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H to infinity optimal control of a counter-current process
… the gold bearing ore and the activated carbon flow in a counter-current fashion. This counter-current flow enables a high percentage of the gold to be recovered. Gold can then be recovered through an elution process. Large amounts of activated carbon are used in the process and a formal multi …
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Modeling of Multiphase Flow in the Near-Wellbore Region of the Reservoir under Transient Conditions
… cannot be ignored, especially during transient flow in the near-wellbore region. As gas hydrocarbons are produced from underground reservoirs to the surface, liquids can come from condensate dropout, water break-through from the reservoir, or vapor condensation in the wellbore. In all three …
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Studies On Copper Extraction With Hydroxyoxime Extractants For The Design Of Hollow Fibre Membrane Based Extraction Processes
… results. In general it has been found that counter current flow arrangement gave higher concentration driving forces which were reflected in form higher metal concentrations at the extract phase.<br/><br/>A generalised mathematical model was developed in this study which utilised Wilson's …
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Experimental study and modeling of liquid-vapor flow in the second header of microchannel condensers with separation circuitry
… increase of 7.4% for the refrigerant mass flow rate compared to the conventional condenser. The increase in heating capacity for that is 5.1%. In the system-level tests, while having the same cooling capacity, the COP of the system with the separation condenser is 1.3% to 6.6% higher than …