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Droplet size in a rectangular Venturi scrubber
Costa, M. A. M.;Henrique, P. R.;Gon?alves, J. A. S.;Coury, J.R.;
Brazilian Journal of Chemical Engineering , 2004, DOI: 10.1590/S0104-66322004000200024
Abstract: the venturi scrubber is a device which uses liquid in the form of droplets to efficiently remove fine particulate matter from gaseous streams. droplet size is of fundamental importance for the scrubber performance. in the present experimental study, a laser diffraction technique was used in order to measure droplet size in situ in a venturi scrubber with a rectangular cross section. droplet size distribution was measured as a function of gas velocity (58.3 to 74.9 m/s), liquid-to-gas ratio (0.07 to 0.27 l/m3), and distance from liquid injection point (64 to 173 mm). it was found that all these variables significantly affect droplet size. the results were compared with the predictions from correlations found in the literature.
Droplet size in a rectangular Venturi scrubber  [cached]
Costa M. A. M.,Henrique P. R.,Gon?alves J. A. S.,Coury J.R.
Brazilian Journal of Chemical Engineering , 2004,
Abstract: The Venturi scrubber is a device which uses liquid in the form of droplets to efficiently remove fine particulate matter from gaseous streams. Droplet size is of fundamental importance for the scrubber performance. In the present experimental study, a laser diffraction technique was used in order to measure droplet size in situ in a Venturi scrubber with a rectangular cross section. Droplet size distribution was measured as a function of gas velocity (58.3 to 74.9 m/s), liquid-to-gas ratio (0.07 to 0.27 l/m3), and distance from liquid injection point (64 to 173 mm). It was found that all these variables significantly affect droplet size. The results were compared with the predictions from correlations found in the literature.
Film fraction in a vertical circular Venturi scrubber
Guerra, Andressa Pinheiro;Guerra, Vádila Giovana;Coury, José Renato;Gon?alves, José Ant?nio S.;
Journal of the Brazilian Society of Mechanical Sciences and Engineering , 2011, DOI: 10.1590/S1678-58782011000500004
Abstract: the liquid film affects significantly the venturi scrubber efficiency. film fraction was measured in a vertically mounted laboratory scale venturi scrubber with a 0.020 m throat diameter. the liquid was injected at the throat by one to six 0.001 m holes. the throat gas velocity varied from 50 to 90 m/s and the relative jet penetration varied between 0.05 and 0.85. a special test section with a slot was used to extract the film. the test section could be placed at different axial positions, allowing measurements at 0.0075, 0.0275 and 0.0675 m after the injection point. results showed that film fraction varies as a function of the relative jet penetration and with distance from the injection point. there exists an optimal relative jet penetration (between 0.25 and 0.40) which minimizes film fraction. film fraction increased with axial distance in the range studied, up to 3.375 throat diameters after the injection point.
A Review of Performance of a Venturi Scrubber  [cached]
Majid Ali,Yan Chang Qi,Khurram Mehboob
Research Journal of Applied Sciences, Engineering and Technology , 2012,
Abstract: Due to stringent regulations of safety of nuclear power plants, numerous efforts have been made to remove particulate matter and gaseous pollutants from a gas stream prior to its emission into the environment during severe accidents. Venturi scrubbers are one of the most popular and highly efficient gas cleaning devices, which frequently remove particulate matter and gaseous pollutants from the gas stream via droplets formed by liquid atomization, usually in the venturi throat. The objective of this study is to present the review of published studies in the last few decades related to the performance of the venturi scrubber to make an optimal design to achieve the required standards.
Performance of a Venturi scrubber in the removal of fine powder from a confined gas stream
Costa, Maria Angélica Martins;Ribeiro, Ana Paula Rodrigues Alves;Tognetti, érica Rodrigues;Aguiar, M?nica Lopes;Gon?alves, José Ant?nio Silveira;Coury, José Renato;
Materials Research , 2005, DOI: 10.1590/S1516-14392005000200016
Abstract: experimental results on the performance of a laboratory scale rectangular venturi scrubber in the removal of fine mineral particles from a confined air stream are presented, and a new correlation is proposed and evaluated. the scrubber was operated with air velocities in the throat varying from 58 m/s to 75 m/s and liquid flow rates varying from 280 ml/min to 900 ml/min. liquid was injected as a jet emerging from a 1.0 mm orifice at the throat. results for dust collection grade efficiency varied from 87% to 98% for particles from 0.1 μm to 2.0 μm.
Droplet dispersion angle measurements on a Pease-Antony Venturi scrubber
Puentes, N. A. G.;Guerra, V. G.;Coury, J. R.;Gon?alves, J. A. S.;
Brazilian Journal of Chemical Engineering , 2012, DOI: 10.1590/S0104-66322012000100011
Abstract: a pease-anthony venturi scrubber is a gas cleaning device that uses liquid, injected in the equipment as jets, to remove contaminants from the gas. the liquid jet is atomized into droplets, which are dispersed throughout the equipment due to the turbulence. the performance of the scrubber is affected by the spatial distribution of the droplets. although cfd models have been used to predict the droplet dispersion, these models are expensive. alternatively, the concept of "jet spreading angle" could be used as a simple and quick way to estimate droplet dispersion. the purpose of this paper is to measure the spreading angle of jets transversally injected into the throat of a venturi scrubber and correlate it with both gas and jet velocities. the throat gas velocities varied between 59 and 74 m/s and the jet velocity between 3.18 and 19.1 m/s. the angles were measured through image analysis, obtained with high velocity photography. the spreading angle was found to be strongly dependent on jet velocity.
Analysis of Liquid Fraction in Venturi Scrubber by E-E Method Using CFX  [cached]
Majid Ali,Yan Changqi,Sun Zhongning,Wang Jianjun
Research Journal of Applied Sciences, Engineering and Technology , 2012,
Abstract: In this research, the distribution of liquid fraction in cylindrical venturi scrubber is analyzed in ANSYS CFX by Eulerian-Eulerian regime. Liquid gaps allow the aerosols to escape from the venturi scrubber. Therefore, it is vital to investigate the liquid fraction in venturi scrubber at different operating condition. The mesh model is developed in ANSYS ICEM and simulation is conducted in ANSYS CFX. k- ε turbulence model is used for simulation of two phase flow in venturi scrubber. The analysis is based on the boundary condition of mass flow rate for air inlet and static pressure for water inlet. For air mass flow rate 0.11, 0.14, 0.17 and 0.2 kg/s, respectively whereas static pressure 245 and 588 Pa for water inlet is used.
Modeling Submicron Particles Collection in Laminar Forced Convection Gas Flow by a Rectangular Venturi Scrubber  [PDF]
Serge Wendsida Igo, Kokou N’wuitcha, Belkacem Zeghmati, Xavier Chesneau
Open Journal of Air Pollution (OJAP) , 2016, DOI: 10.4236/ojap.2016.51002
Abstract: Venturi scrubbers are usually used for large particles cleaning in turbulent gaseous flow. In this work, submicron particles scrubbing in laminar forced convection dusty air flow in a rectangular venturi scrubber have been numerically simulated. Hydrodynamics effects and scrubbing process are investigated in detail. Results are presented as flow velocity, axial pressure, streamlines pattern, particles and droplets mass fraction profile, and collect efficiency. They show that venturi scrubbers can be efficient for submicron particles scrubbing. In fact, a better collect efficiency is obtained at high particles-droplets residence time, high ratio droplets concentration/particles concentration, low venturi diameter ratioand low Reynolds numbers. There is a critical Reynolds number value for which the collect efficiency becomes very low and tends to be constant.
Modeling of pressure drop distribution in circulating fluidized bed scrubber
循环流化床烟气脱硫系统内压降的建模

Fan Liting,Wang Fuli,Li Hongru,
范丽婷
,王福利,李鸿儒

环境工程学报 , 2013,
Abstract: Pressure drop is the key operating variable to maintain the circulating fluidized bed (CFB) scrubber running safely. It is important to estimate the flow behavior in the CFB scrubber and regulate the pressure drop in the range of set value. By analyzing the contact regime in the scrubber, one-dimensional axial flow model was established based on material conservation and experimental correlations. Simulation studies were performed to investigate the steady state and dynamic behaviors of the CFB scrubber, and the simulation results indicated that the performance of the proposed model was satisfactory and the model could subsequently be used in studies of control and optimization design of the CFB scrubber.
EXPERIMENTAL STUDY OF GAS CLEANING BY A WET APPROACH VENTURI TYPE
SERGE WENDSIDA IGO,DIEUDONNE JOSEPHBATHIEBO,BELKACEM ZEGHMATI,XAVIER CHESNEAU
Journal of Engineering Studies and Research , 2012,
Abstract: The present work concern an experimental study of gas cleaning by a wet venturi scrubber. The water is introduced before the convergent and streams as a liquid along the venturi walls. Hydrodynamics, mass and thermal mechanisms occurring in the venturi tube and the scrubbing process are investigated in detail. Results show that the maximum density of water vapor resulting of vaporization of the liquid film is observed in the venturi throat. In addition, the collect efficiency increases as the inlet gas velocity and the scrubbing liquid flow rate increase.
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