Investigation and Analysis of the Hydrodynamic Characteristics of Regular Contact Devices in Mass-Exchange Columns

2004 ◽  
Vol 40 (5/6) ◽  
pp. 269-274
Author(s):  
V. V. Klyuiko ◽  
L. P. Kholpanov
Keyword(s):  
Mass Exchange ◽  
Hydrodynamic Characteristics ◽  
Contact Devices ◽  
Regular Contact

Contact Devices for High-Heat Mass-Exchange Processes (Review)

2014 ◽  
Vol 50 (5-6) ◽  
pp. 301-305
Author(s):  
A. V. Stepykin ◽  
A. A. Sidyagin
Keyword(s):  
Mass Exchange ◽  
High Heat ◽  
Exchange Processes ◽  
Contact Devices

scholarly journals The effect of absorption process parameters on its efficiency

2018 ◽  
Vol 245 ◽  
pp. 03011
Author(s):  
Valeri Kiss ◽  
Aleksandr Evdokimov ◽  
Tatiana Kaverzneva ◽  
Dmitriy Tarkhov
Keyword(s):  
Aerodynamic Characteristics ◽  
Process Efficiency ◽  
Hydrodynamic Characteristics ◽  
Absorption Process ◽  
Water Vapor Absorption ◽  
Energy Characteristics ◽  
Contact Devices ◽  
Longitudinal Mixing ◽  
Aerodynamic Parameters ◽  
Degree Of Extraction

In this work we are presenting the results of studies of the effect of hydro and aerodynamic parameters of the process of water vapor absorption during intensive bubbling in the dynamic foam mode on the absorption process efficiency. As a result, it was found that the hydrodynamic characteristics (height of the foam layer of the absorbent and its resistance) and aerodynamic characteristics (gas velocity, longitudinal mixing in the gas phase) have the main influence on the efficiency of the absorption process. We also investigated the effect on the efficiency of the process of kinetic characteristics, characterized by the number of transport units and absorption factor. We have proposed to estimate the overall efficiency of the process, taking into account the degree of extraction, as well as the energy characteristics (hydraulic resistance), weight and size characteristics and the drop entrainment volume. For this purpose, for the overall assessment we have proposed to introduce a conditional optimality ratio, allowing to make a comparison of both various contact devices and absorbents.

scholarly journals Experimental plant for studying hydrodynamics and heat and mass exchange processes in packing contact devices

2019 ◽  
Vol 1278 ◽  
pp. 012024 ◽  
Author(s):  
N A Merentsov ◽  
A V Persidskiy ◽  
M V Topilin ◽  
V N Lebedev ◽  
V A Balashov ◽  
...  
Keyword(s):  
Mass Exchange ◽  
Experimental Plant ◽  
Heat And Mass Exchange ◽  
Exchange Processes ◽  
Contact Devices

scholarly journals SWIRL STAGES FOR HEAT AND MASS EXCHANGE EQUIPMENT

2020 ◽  
pp. 347-354
Author(s):  
Anastasiya Viktorovna Bogatkova ◽  
Aleksandr Sergeyevich Frolov ◽  
Denis Andreyevich Zemtsov ◽  
Ol'ga Petrovna Zhukova ◽  
Nikolay Aleksandrovich Voynov
Keyword(s):  
Gas Phase ◽  
Hydraulic Resistance ◽  
Mass Exchange ◽  
Fluid Velocity ◽  
Experimental Studies ◽  
Interphase Surface ◽  
Annular Channels ◽  
Interfacial Surface ◽  
Working Volume ◽  
Contact Devices

The results of experimental studies of hydrodynamics and mass exchange at vortex stages in bubbling mode are presented, as well as data of numerical simulation by finite element method using models of k-ε This made it possible to establish the presence of circulation movement of liquid at the stage, to determine profiles of phase speeds, to obtain the value of initial speed of gas phase movement, at which coordination of experimental and design values of liquid speed is observed. The design method shows the effect of the cylindrical partition installed between the swirler and the stage wall on the fluid velocity profile and its distribution in the working volume. It is proposed to use the obtained results of numerical modeling when designing multi-element stages to provide the required hydrodynamics on it. New vortex contact devices with annular channels, having lower hydraulic resistance compared to tangential devices and providing a developed interfacial surface, stable without fluctuations, operation of the stage at high gas and liquid flow rates, have been investigated. Data are presented for determination of hydraulic resistance of vortex stage, value of interfacial surface, coefficients of mass output and efficiency in investigated range of loads of liquid and gas L/G = 10-150. Designs of vortex contact stages for industrial brew column have been developed. Contact devices with ring channels allow to bring dissipation of energy in a gas phase in the bubbling and ring mode to 5 W/kg, to increase an interphase surface to 2000 m-1 and to reach the size of superficial coefficient of a massotdacha about (0.5-0.8)·10-3 of m/s.

Comparative Heat and Mass Transfer Tests of Structured Packings with Film and Droplet Flow

2019 ◽  
pp. 4-21
Author(s):  
E.K. Aliev ◽  
V.V. Volodin ◽  
V.V. Golub ◽  
A.Yu. Mikushkin ◽  
G.G. Timerbaev ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Heat And Mass Transfer ◽  
Mass Exchange ◽  
Gas Flow ◽  
Packed Bed ◽  
Hydraulic Characteristics ◽  
Heat And Mass Exchange ◽  
Contact Devices ◽  
Structured Packings ◽  
Gas Volume

The paper focuses on comparative studies of heat and mass transfer and hydraulic characteristics of two structured packings which provide heat and mass transfer of contacting media in the film flow of liquid Mellapak 250.X and with fluid dispersion in the gas volume PVN.22. The experiments were carried out in a heat-mass exchange column of 400 mm in diameter and of 1 m in height of a packed bed. The method of evaporative cooling of water in the air flow was adapted to obtain heat and mass exchange characteristics of packed contact devices. Findings of research show the effect of irrigation density and gas flow on heat and mass transfer and hydraulic characteristics of packings which provide heat and mass transfer of contacting media in film and droplet flows. A criterion for estimating the efficiency of contact devices is proposed.

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