Droplet size distribution in a full-scale rectangular self-priming Venturi scrubber with liquid film injection

Breitenmoser, David; Papadopoulos, Petros; Lind, Terttaliisa; Prasser, Horst-Michael

doi:10.1016/j.ijmultiphaseflow.2021.103694

Cited by 13 publications

(5 citation statements)

References 68 publications

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“…The analysis also found that the absorption efficiency of the venturi reactor was lower than the experimental findings. 25 , 26 This was because the process adopted the ring suction self-priming design, which had a sizable liquid diversion, to reduce the pressure drop. And, the atomization rate and droplet size were large, leading to a particular gap in performance.…”

Section: Resultsmentioning

confidence: 99%

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Pilot-Scale Experimental Study on the Coupling of Venturi-Bubbling Reactor to Promote the Absorption of Leaked H₂S

Zhang,

Zheng,

Dong

2024

ACS Omega

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Natural gas generates varying concentrations of H 2 S during natural formation and extraction, and H 2 S leak accidents are frequent, posing a significant threat to the safety of human life and the environment. Conventional treatment technology equipment is large and does not meet the emergency requirements of the complex topographical gas field. This study aimed to design a pilot-scale method coupling the venturi and bubbling reactors to reduce equipment size and improve emergency capabilities for the absorption of leaked H 2 S. It found that the ring system self-priming venturi reactor, which was suitable only for the coarse treatment of toxic gases, maintained an absorption efficiency of around 50% under most operating conditions, with substantial variations due to changes in process parameters, but that redundancy of the bubbling reactor was high. With the synergistic effect of venturi and bubbling, the coupling process had an extremely high absorption efficiency, basically more than 95%. The experiments also showed that the H 2 S concentration at the outlet of the venturi−bubbling reactor increased with increasing inlet gas concentration and gas volume. The absorption performance improved significantly on increasing Fe 3+ concentration; it increased first and then remained constant, and the optimum Fe 3+ concentration for the absorption of leaked H 2 S was 21 000 mg/m 3 . The absorption performance decreased with increasing submergence height and then remained stable after the size of the inlet approached 600 mm, whereas the overall absorption efficiency of the venturi−bubbling reactor remained constant. The optimum operating temperature range was 10 °C−50 °C. The experimental system kept the outlet concentration below the emergency discharge standard for a continuous period of 48 h following practical use in the gas field and resulting in significant enhancement in mass transfer performance, fully satisfying the emergency requirements.

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Section: Resultsmentioning

confidence: 99%

“…Reducing submersion height also reduced the time for the toxic gas to penetrate the absorber bed and the adequate gas–liquid contact time at the same gas flow rate based on the observations. 25 , 26 It was reflected in a significant increase in gas concentration at the venturi reactor outlet and a decrease in mass transfer performance.…”

Section: Resultsmentioning

confidence: 99%

Pilot-Scale Experimental Study on the Coupling of Venturi-Bubbling Reactor to Promote the Absorption of Leaked H₂S

Zhang,

Zheng,

Dong

2024

ACS Omega

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“…The continuity, momentum, diffusion, and species transfer equations that express the governing equations for Newtonian, incompressible, and immiscible flows are defined as follows [1,2]: ∇u = 0 (1)…”

Section: Governing Equationsmentioning

confidence: 99%

“…Venturi uses the high energy produced by accelerating the gas in the convergence section to break up the liquid into droplets in the throat. These droplets are responsible for cleaning the gas as they encapsulate and trap the particles [1,2].…”

Section: Introductionmentioning

confidence: 99%

“…Kailash [2] investigated the performance evaluation of a venturi aeration system. Breitenmoser et al [1] presented a model to predict the efficiency of droplet size distribution in a venturi scrubber with liquid film injection. Viswanathan [6] developed an annular flow model to predict the pressure drop in a venturi and considers venturi geometry, throat gas velocity, liquid-to-gas ratio, and liquid film flow rate.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Simulation of the Cleaning Performance of a Venturi Scrubber

et al. 2022

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Industrial applications need to use different systems for the problem of gas cleaning. A lot of processes have been developed, such as the use of a venturi for gas cleaning and pollution reduction. Additionally, several studies have been developed especially in terms of pressure drop because it is one of the main parameters to determine its efficiency. While the phenomenon of mass transfer in a venturi scrubber has not found much attention, in the present study, a mass transfer two-dimensional simulation is developed for gasification gas cleaning through a venturi scrubber with boundary conditions represented in air inlet velocities of 10, 15, and 20 m/s and water inlet mass flow of 0.02, 0.04 and 0.06 kg/s. In this work, Navier–Stokes equations are solved numerically and the mass transfer technique is treated by the volume of fluid (VOF) model, using CFD software. The obtained results were analyzed by presenting the mass fraction, velocity and pressure contours, and profiles. The probability density function (PDF) of mass transfer is studied too, showing how the removal efficiency of the venturi scrubber increases with a decrease in the liquid flow rate and an increase in the gas velocity. Therefore, the results show that the proposed venturi has the best mass transfer performance with a PDF that reaches 97.6 for velocity liquid of 20 m/s and the removal efficiency showed higher values at low liquid flow rates.

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A unified heat transfer model for gas-liquid two-phase mixing process in a rectangular channel based on steady status identification

Yang,

Wang,

Wang

et al. 2024

Applied Thermal Engineering

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Droplet size distribution in a full-scale rectangular self-priming Venturi scrubber with liquid film injection

Cited by 13 publications

References 68 publications

Pilot-Scale Experimental Study on the Coupling of Venturi-Bubbling Reactor to Promote the Absorption of Leaked H₂S

Pilot-Scale Experimental Study on the Coupling of Venturi-Bubbling Reactor to Promote the Absorption of Leaked H₂S

Numerical Simulation of the Cleaning Performance of a Venturi Scrubber

A unified heat transfer model for gas-liquid two-phase mixing process in a rectangular channel based on steady status identification

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Droplet size distribution in a full-scale rectangular self-priming Venturi scrubber with liquid film injection

Cited by 13 publications

References 68 publications

Pilot-Scale Experimental Study on the Coupling of Venturi-Bubbling Reactor to Promote the Absorption of Leaked H2S

Pilot-Scale Experimental Study on the Coupling of Venturi-Bubbling Reactor to Promote the Absorption of Leaked H2S

Numerical Simulation of the Cleaning Performance of a Venturi Scrubber

A unified heat transfer model for gas-liquid two-phase mixing process in a rectangular channel based on steady status identification

Contact Info

Product

Resources

About

Pilot-Scale Experimental Study on the Coupling of Venturi-Bubbling Reactor to Promote the Absorption of Leaked H₂S

Pilot-Scale Experimental Study on the Coupling of Venturi-Bubbling Reactor to Promote the Absorption of Leaked H₂S