RESEARCH OF HYDRAULIC RESISTANCE OF VORTEX RECTIFICATION STAGES

The article deals with the issue of studying the hydraulic resistance of vortex contact stages for rectification equipment used for separation of alcohol-containing solutions obtained on the basis of hydrolysate of vegetable raw materials. Based on the conducted research, the dependences for determining the hydraulic resistance coefficient for axial and tangential swirlers are obtained. It is shown how the design parameters affect the change in the coefficient of hydraulic resistance. Hydraulic resistance is an important hydrodynamic characteristic of contact stages, which characterizes the energy consumption of the gas flow for the mass transfer process and determines the scope of its application in practice. Knowledge of the amount of hydraulic losses in the device is also necessary when calculating the schemes of technological strapping of the device. Currently, there are numerous data on the study of regularities in the domestic and foreign literature.

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Calculation of hydraulic resistance in the separator of the direct-flow control valve with a rotary lock

E3S Web of Conferences ◽

10.1051/e3sconf/202022001073 ◽

2020 ◽

Vol 220 ◽

pp. 01073

Author(s):

Anna Kapranova ◽

Anton Lebedev ◽

Alexander Melzer

Keyword(s):

Flow Control ◽

Hydraulic Resistance ◽

Control Valve ◽

Resistance Coefficient ◽

Hydrodynamic Cavitation ◽

Qualitative Assessment ◽

Design Parameters ◽

Flow Control Valve ◽

Direct Flow ◽

Method Of Calculation

The purpose of this work is to analyze the coefficient of hydraulic resistance in the separator of a direct-flow control valve with a rotary lock according to the approximation of the superposition of pressure losses in elementary local resistances. In contrast to the known methods of constructing simulation models, the proposed analytical method of calculation is based on a qualitative assessment of the specified coefficient in the implementation of throttling of fluid flows in the “separator-rotary lock” unit, depending on the design and operating parameters of the process. It was found that, within the selected range of variation of the separator parameters, an increase in the valve opening degree from 20% to 50% leads to a decrease in the hydraulic resistance coefficient by 19.6 times, and an increase in this degree from 20% to 100% is associated with a 42.4-fold decrease in the studied characteristic. This circumstance justifies the effectiveness of the proposed method for throttling the flows of the working medium. The results obtained are used to study the influence of the main design parameters of the “separator-butterfly valve” unit on the flow capacity of the control valve and are relevant for stochastic modeling of the hydrodynamic cavitation process.

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Asymptotic method for finding the coefficient of hydraulic resistance in lifting of fluid on tubing

Journal of Inverse and Ill-Posed Problems ◽

10.1515/jiip-2014-0028 ◽

2015 ◽

Vol 23 (5) ◽

Cited By ~ 1

Author(s):

Fikret A. Aliev ◽

Nevazi A. Ismailov ◽

Atif A. Namazov

Keyword(s):

Small Parameter ◽

Hydraulic Resistance ◽

Hyperbolic Equations ◽

Resistance Coefficient ◽

Nonlinear Ordinary Differential Equation ◽

First Approximation ◽

Coefficient Of Hydraulic Resistance ◽

Quadratic Deviation ◽

Gas Volume ◽

Gas Lift

AbstractIn this work the process of gas-lift in the oil production is considered. The process is described by partial differential equations of hyperbolic type. A small parameter is introduced, which is the inverse of the well depth. Gas-lift process is investigated behind the front of sound wave. The initial system of hyperbolic equations is reduced to the nonlinear ordinary differential equation (NODE) of the first order relatively to the gas volume and gas liquid (GLM), which depends on the coordinates of wells and hydraulic resistance coefficient (HRC). An asymptotic solution of NODE is obtained and this solution is calculated at the point. It is shown that for the determination of HRC statistical data of well is required (volume of injected gas at the wellhead of the annular space and GLM at the end of lift (debit)). Then on the basis of these results, by constituting the corresponding functional, which is the quadratic deviation of the statistics and calculated asymptotic solutions, the functional gradient is derived that allows one to calculate HRC in first approximation relative to small parameter. An example for the specific case from the practice shows that HRC in first approximation differs from the value on the order of 10

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Collecting of finely dispersed particles by means of a separator with the arc-shaped elements

E3S Web of Conferences ◽

10.1051/e3sconf/201912600007 ◽

2019 ◽

Vol 126 ◽

pp. 00007 ◽

Cited By ~ 5

Author(s):

Andrey V. Dmitriev ◽

Vadim E. Zinurov ◽

Oksana S. Dmitrieva

Keyword(s):

Hydraulic Resistance ◽

Flow Rate ◽

Gas Flow ◽

Reynolds Numbers ◽

Resistance Coefficient ◽

Dusty Gas ◽

Gas Flow Rate ◽

Hydraulic Resistance Coefficient ◽

Purification Efficiency ◽

Dispersed Particles

This paper includes the description of a separator, developed by the authors for the gas flow purification from the finely dispersed particles. The authors also studied the influence of the separator dimensions and the dusty gas flow rate on the degree of its purification from the finely dispersed particles, as well as on the change in the hydraulic resistance of this apparatus. This paper also shows that the main forces that make the greatest contribution to the purification of the gas flow from the finely dispersed particles are centrifugal and inertial. Moreover, the dependencies of the purification efficiency on the Stokes numbers are shown in this paper. The authors studied the change in the hydraulic resistance coefficient of this apparatus from the Reynolds numbers as well.

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The gas flow dynamics in a separator with coaxially arranged pipes

MATEC Web of Conferences ◽

10.1051/matecconf/202032903035 ◽

2020 ◽

Vol 329 ◽

pp. 03035

Author(s):

Vadim E. Zinurov ◽

Andrey V. Dmitriev ◽

Guzel R. Badretdinova ◽

Rustem Ya. Bikkulov ◽

Ilnur N. Madyshev

Keyword(s):

Hydraulic Resistance ◽

Flow Rate ◽

Pressure Loss ◽

Gas Flow ◽

Resistance Coefficient ◽

Centrifugal Separation ◽

Gas Flow Rate ◽

Ansys Fluent ◽

Separation Device ◽

Numerical Studies

In order to increase the efficiency of gas purification from the particles of up to 20 microns and to increase the service life of bag and electrostatic filters, the authors propose to use a centrifugal separation device with coaxially arranged pipes to be installed before the fine purification devices. The numerical studies of gas dynamics in a separation device were conducted in ANSYS Fluent software package. As a result of conducted numerical studies, it was found that the pressure loss in the centrifugal separation device is not more than 70 Pa at the inlet gas flow rate from 1 to 15 m/s and the width of rectangular hole within the range from 10 to 15 mm. The low pressure losses are caused by the design features; in particular, the resulting vortices in the inter-cylindrical space practically do not contact the wall surfaces of device. The equations of pressure loss depending on the width of rectangular holes and the hydraulic resistance coefficient of separation device depending on the inlet gas flow rate were obtained. The design coefficient of hydraulic resistance of separation device was equal to 0.45.

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Analysis on Resistance Coefficients and Optimization of Structure and Properties of Porous Permeable Refractory

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.368-372.1155 ◽

2008 ◽

Vol 368-372 ◽

pp. 1155-1157

Author(s):

Mei Jie Zhang ◽

Hou Zhi Wang ◽

Hua Zhi Gu ◽

Ao Huang

Keyword(s):

Gas Flow ◽

Pore Diameter ◽

Raw Materials ◽

High Strength ◽

Resistance Coefficient ◽

Two Phase ◽

Average Pore ◽

Statistical Correlations ◽

Gas Blowing ◽

Resistance Coefficients

The resistance coefficients through which gas flow permeable refractory are important properties and have great effect on the gas blowing parameters and gas-liquid two phase flowing characteristics in the metallurgy furnace such as ladles, tundish. In this paper, the resistance coefficients were measured according to the Forchheimer’s law. The results show when the gas flow rate is fixed, the viscosity resistance coefficient and inertia resistance coefficient decrease as the apparent porosity and average pore diameter increase. The viscous resistance coefficient is more lager than the inertial resistance coefficient. The resistance coefficients were analyzed by dimensional analysis and the statistical correlations between the resistance coefficients and parameters of porous permeable refractory were got based on the experimental data. In order to get high strength at low resistance coefficients, the raw materials particle degree were adjusted.

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