Pressure drop below the load zone in a Raschig-ring packed column with countercurrent air—water flows

1974 ◽  
Vol 7 (3) ◽  
pp. 257-260 ◽  
Author(s):  
J. Andrieu
Keyword(s):  
Pressure Drop ◽  
Packed Column ◽  
Raschig Ring ◽  
Water Flows

Pressure drop for two phase counter-current flow in a packed column with a novel internal

2003 ◽  
Vol 94 (3) ◽  
pp. 179-187 ◽  
Author(s):  
Minghan Han ◽  
Hongfei Lin ◽  
Yanhui Yuan ◽  
Dezheng Wang ◽  
Yong Jin
Keyword(s):  
Pressure Drop ◽  
Current Flow ◽  
Packed Column ◽  
Two Phase ◽  
Counter Current Flow ◽  
Counter Current

Comparison and Selection of Different Medium on the Effect of Improving Soil Deodorization

2012 ◽  
Vol 610-613 ◽  
pp. 1328-1332
Author(s):  
Zu Xin Xu ◽  
Jian Xiu Huang ◽  
Huai Zheng Li ◽  
Wei Bing Chen ◽  
Wei Gang Wang
Keyword(s):  
Blast Furnace ◽  
Pressure Drop ◽  
Blast Furnace Slag ◽  
Removal Rate ◽  
Packed Column ◽  
Combined System ◽  
Ammonia Gas ◽  
Odor Concentration ◽  
Furnace Slag ◽  
Selection Of

Based on the investigation of odor concentration of retention tank in combined system, it aim at the removal of mixed odor and pressure drop with blast furnace slag, pebble, sand as improved medium and soil as contrast through mixed odor of ammonia gas and hydrogen sulfide made in lab-scale. The results showed that the removal rate of H2S by different medium packed column becomes stable after 12 days, and 35 days for NH3. Pressure drop of each column meets with Equation Ergum and under the same condition the order is as follows: soil>sand>pebble>blast furnace slag. And the removal rate of each medium is: soil>sand>blast furnace slag. The soil is good for removal but its pressure drop is so high that it limits flow charge, thus its removal rate is the lowest. As a result, sand and pebble as the medium for soil deodorization considering pressure drop and the effect of deodorization were chosen. It turns out that the removal rate of NH3 is higher than 65% while H2S higher than 98%.

scholarly journals A new correlation for pressure drop of packed column.

1979 ◽  
Vol 12 (5) ◽  
pp. 341-346 ◽  
Author(s):  
TERUO TAKAHASHI ◽  
YASUHARU AKAGI ◽  
KATSUKI UEYAMA
Keyword(s):  
Pressure Drop ◽  
Packed Column ◽  
New Correlation

scholarly journals Drag Reduction with Biopolymer-Synthetic Polymer Mixtures in Oil-Water Flows: Effect of Synergy

2020 ◽  
Vol 24 (6) ◽  
pp. 1-10
Author(s):  
Lawrence Chukwuka Edomwonyi-Otu ◽  
Muhammed Muhammed Gimba ◽  
Nurudeen Yusuf
Keyword(s):  
Reynolds Number ◽  
Pressure Drop ◽  
Pressure Gradient ◽  
Drag Reduction ◽  
Water Flow ◽  
Transport Systems ◽  
Test Fluid ◽  
Polymer Mixture ◽  
Water Flows ◽  
Oil Water

The search for lower cost materials that reduce pressure drop in fluid transport systems in oil and gas industries to conserve pumping energy is of paramount importance. Polymers are known to reduce pressure drop in pipeline oil-water flows in a process referred to as drag reduction (DR). The effect of partially hydrolysed polyacrylamide, polyethylene oxide, Aloe Vera mucilage and their mixtures as drag reducing polymers (DRPs) on pressure gradient (pressure drop; Δp) in pipeline oil-water flows were studied. The experiment was carried out in flow rig with 0.02-m diameter straight unplasticised polyvinylchloride (uPVC) pipe, two centrifugal pumps, control valves and two storage tanks. Tap water (ρ = 997 kg/m3 and µ = 0.89 cP) and diesel (ρ = 832 kg/m3 and µ = 1.66 cP) were used as the test fluid at ambient condition. The polymer mixture total concentration (MTC) of 30 and 400 ppm at different mixing proportion, mixture Reynolds number (Remix) and oil input volume were investigated. The results show increase in pressure gradient with increase in oil input volume in both single-phase water flow and oil-water flow before adding drag reducing polymers (DRPs). However, Δp decreased after adding DRPs with increase in Reynolds number (Re) or Remix and decrease in the oil-phase Re, and vice versa. The results further showed higher reduction in pressure drop by the polymer mixture than in each of the polymer used at the same conditions. The rigidness of the biopolymer was improved by adding synthetic polymers which resulted to increase in DR efficiency.

Experimental Investigation on Heat Transfer and Pressure Drop of Supercritical Water Flows in 2×2 Bundle With Wire Wraps

2017 ◽  
Author(s):  
Li Hong-bo ◽  
Hu Zhen-xiao ◽  
Lu Dong-hua ◽  
Gu Han-yang
Keyword(s):  
Heat Transfer ◽  
Experimental Investigation ◽  
Pressure Drop ◽  
Supercritical Water ◽  
Critical Conditions ◽  
Bulk Temperature ◽  
Experimental Conditions ◽  
Water Flows ◽  
Dc Power ◽  
Test Loop

An experimental investigation on heat transfer of supercritical water and transient heat transfer during pressure drop from supercritical to sub-critical conditions in a 2×2 bundle with two channels has been carried out on the supercritical water multipurpose test loop II (SWAMUP-II). The bundle consists of four heated rods with an O.D. of 10 mm and a pitch-to-diameter ratio of 1.18. The 2×2 bundle with wire wrap is installed into a square assembly box with rounded corners by which the test section is separated into two channels. Water flows downward in the first channel between the pressure tube and the assembly box, and then turns upward in the second channel inside the assembly box to cool the four heated rods, which are directly heated by DC power. The experimental conditions are as follows: pressure ranging from 16 to 26 MPa, mass flux from 400 to 1450 kg/m2s, heat flux from 250 to 1000 kW/m2, bulk temperature from 280 to 500 °C, and pressure drop rate of 1 and 2 MPa/min. The experimental data are obtained and heat transfer characteristics discussed.

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