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, Mônica Lopes; Gonçalves, José Antônio Silveira; Coury, José Renato

doi:10.1590/s1516-14392005000200016

Cited by 15 publications

(7 citation statements)

References 3 publications

(3 reference statements)

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“…Estimation of the efficiency of trapping solid particles in a wet Venturi scrubber can be performed on the basis of a mathematical model of particle deposition on water droplets in a Venturi tube [6,7], the adequacy of which is confirmed by experimental data [5,8,9], using the formula^…”

Section: Methodsmentioning

confidence: 99%

Wet integrated flue gas cleaning

Volchyn¹,

Rashchepkin²,

Yasynetskyi³

et al. 2019

Chemical Technology and Engineering. Proceedings.2019.№1

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A wet method for flue gas cleaning from ash and sulfur dioxide based on a wet venturi scrubber has been proposed An increase in the specific consumption of irrigation water in the Venturi tube of 0.7 kg/m3 and higher will allow reaching an output dust concentration below 20 mg/m 3 , while reducing the energy consumption of flue gas for droplet evaporation and fresh water consumption. The use of ammonia in wet desulfurization technology will allow the use of an existing wet scrubber while observing the SO 2 limit concentration of 200 mg/m 3 .

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Section: Methodsmentioning

confidence: 99%

Wet integrated flue gas cleaning

Volchyn¹,

Rashchepkin²,

Yasynetskyi³

et al. 2019

Chemical Technology and Engineering. Proceedings.2019.№1

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“…Throat is used for interaction of liquid and gases. In the diffuser/divergent section the gas is slowing down allowing some recovery of pressure [37,38]. Jet ejectors have favorable mixing and mass transfer characteristics so they are more used among other gas-liquid contactors.…”

Section: Jet Ejectormentioning

confidence: 99%

Numerical Simulation of Bubble Coalescence and Break-Up in Multinozzle Jet Ejector

Patel

Chaudhari

Лаари

et al. 2016

Journal of Applied Mathematics

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Designing the jet ejector optimally is a challenging task and has a great impact on industrial applications. Three different sets of nozzles (namely, 1, 3, and 5) inside the jet ejector are compared in this study by using numerical simulations. More precisely, dynamics of bubble coalescence and breakup in the multinozzle jet ejectors are studied by means of Computational Fluid Dynamics (CFD). The population balance approach is used for the gas phase such that different bubble size groups are included in CFD and the number densities of each of them are predicted in CFD simulations. Here, commercial CFD softwareANSYS Fluent 14.0is used. The realizablek-εturbulence model is used in CFD code in three-dimensional computational domains. It is clear that Reynolds-Averaged Navier-Stokes (RANS) models have their limitations, but on the other hand, turbulence modeling is not the key issue in this study and we can assume that the RANS models can predict turbulence of the carrying phase accurately enough. In order to validate our numerical predictions, results of one, three, and five nozzles are compared to laboratory experiments data for Cl2-NaOH system. Predicted gas volume fractions, bubble size distributions, and resulting number densities of the different bubble size groups as well as the interfacial area concentrations are in good agreement with experimental results.

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“…Одним из широко применяемых скрубберов с орошением газа струями капель является струйный газопромыватель (СГП) -Jet scrubber. это прямоточный аппарат с капельным орошением из форсунок, который может иметь как цилиндрическую форму, так и форму трубы Вентури [20,27,33,42]. В этом устройстве капли двигаются по направлению газового потока со скоростью превышающей скорость газа [23,28,32].…”

Section: Introductionunclassified

Dynamic Behavior of Liquid Flow Rate from Nozzles in Jet Scrubbers of Pulp Production

Aniskin¹,

Kurov²

2021

Lesnoy Zhurnal (Forestry Journal)

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It is shown that the modern development of pulp production technology is associated with the development of gas-liquid systems equipment. Such equipment provides the main technological processes of pulp cooking and regeneration of chemical reagents. Furthermore, this equipment, designed to recover chemical reagents and reduce their emissions into the environment, is part of the technological process. The use of scrubbers in pulp production has an advantage over many other industries, since it uses a closed liquor regeneration cycle. Currently, studies of the processes occurring in scrubbers of different types are becoming more numerous and fundamental. This paper is devoted to the development of jet scrubbers. These devices have a number of properties that do not have scrubbers of other types. They do not create resistance to the gas flow in the flue; they have a gravitational property due to ejection. Only jet scrubbers create the necessary conditions for the stability of the gas flow and have a jet effect that allows to significantly increase the efficiency of emissions cleaning. To implement the jet effect and intensify the technological equipment operation it is required to describe transfer processes in jet scrubbers with regard to polydisperse structure of drop flow and features of liquid splitting up into drops by centrifugal-jet nozzles. Scientific works devoted to the problem of realization of the jet effect showed the need to study the dynamics of liquid splitting in centrifugal-jet nozzles, which create a drop-filled jet with a large opening angle. The research purpose is to study the speed of the initial movement of drops in the area immediately after the splitting section of the continuous jet of liquid flowing from the nozzle. A photographic technique with two spark lamps was used for the experiment. At the same time, the distribution of irrigation density was controlled. The results of measuring the distributions of absolute speed of drops and irrigation density were compared with each other and the function of liquid speed distribution in the cross section of the gas-liquid jet of the jet scrubber was determined. Based on the obtained data, a theoretical model was developed to determine the initial speed of drops of centrifugal jet nozzles, an indicator required for the development of new jet scrubbers. The results can be applied to improve the technological processes of pulp production.

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Performance of a Venturi scrubber in the removal of fine powder from a confined gas stream

Cited by 15 publications

References 3 publications

Wet integrated flue gas cleaning

Wet integrated flue gas cleaning

Numerical Simulation of Bubble Coalescence and Break-Up in Multinozzle Jet Ejector

Dynamic Behavior of Liquid Flow Rate from Nozzles in Jet Scrubbers of Pulp Production

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