Numerical Simulations of Airflow and Droplet Dispersion in a Horizontal Ammonia Scrubber

Li Liu, Peter Vilhelm Nielsen, Per Kvols Heiselberg, Merete Lyngbye, Simon Granath

Publikation: Bidrag til bog/antologi/rapport/konference proceedingKonferenceartikel i proceedingForskningpeer review

Resumé

Ammonia released in pig production industries can lead to eutrophication of surface waters, soil acidification, fertilization of vegetation and changes in ecosystems, etc. Air scrubbers with spray of aerosolized sulphur solution were used to remove the ammonia mixed in the airflow ventilated out from a piggery.

In this study, numerical method were used to investigate airflow pattern, droplet dispersion, ammonia absorption at droplet surface and overall removal efficiency in an air cleaner. Droplet trajectories and elapsed time in air were adopted to characterize the absorption efficiency, and they were simulated by Eularian-Lagrangian method of Computation Fluid Dynamics (CFD). Realizable k-ε turbulence model were used to simulate airflow turbulence.

Strong vortex rotating around the main stream direction were found along the scrubber. To weaken the vortex, the impact of adding a regulating plate or a flow straightener were tested. Impact of nozzle velocity and droplet residue size were analysed. It is found that additional input on the pump pressure to increase the injection velocity may not cause any more benefit in our cases, and the ammonia removal efficiency of the horizontal scrubber is robust on different humidity conditions.
OriginalsprogEngelsk
TitelThe Proceedings of the 11th International Conference on Industrial Ventilation
RedaktørerQianru Zhang
Antal sider9
Vol/bind2
ForlagTongji University
Publikationsdato2015
Sider615-623
KapitelTopic 3. Industrial Ventilation and Pollutant Control
StatusUdgivet - 2015
BegivenhedThe 11th International Conference on Industrial Ventilation - Shanghai, Kina
Varighed: 26 okt. 201528 okt. 2015
Konferencens nummer: 11

Konference

KonferenceThe 11th International Conference on Industrial Ventilation
Nummer11
LandKina
ByShanghai
Periode26/10/201528/10/2015

Fingerprint

airflow
droplet
ammonia
simulation
vortex
air
turbulence
absorption efficiency
fluid dynamics
pig
numerical method
spray
eutrophication
pump
humidity
trajectory
sulfur
surface water
ecosystem
vegetation

Bibliografisk note

Ventilation 2015 is organized by Tongji University, co-organized by Technical Research Center of Finland (VTT) and Tsinghua University. The proceedings is published on a usb.

Emneord

  • Airflow
  • Droplet
  • Evaporation
  • Residence time

Citer dette

Liu, L., Nielsen, P. V., Heiselberg, P. K., Lyngbye, M., & Granath, S. (2015). Numerical Simulations of Airflow and Droplet Dispersion in a Horizontal Ammonia Scrubber. I Q. Zhang (red.), The Proceedings of the 11th International Conference on Industrial Ventilation (Bind 2, s. 615-623). Tongji University.
Liu, Li ; Nielsen, Peter Vilhelm ; Heiselberg, Per Kvols ; Lyngbye, Merete ; Granath, Simon. / Numerical Simulations of Airflow and Droplet Dispersion in a Horizontal Ammonia Scrubber. The Proceedings of the 11th International Conference on Industrial Ventilation. red. / Qianru Zhang. Bind 2 Tongji University, 2015. s. 615-623
@inproceedings{06b1b2022d4c48c4afc1e54abf42fc64,
title = "Numerical Simulations of Airflow and Droplet Dispersion in a Horizontal Ammonia Scrubber",
abstract = "Ammonia released in pig production industries can lead to eutrophication of surface waters, soil acidification, fertilization of vegetation and changes in ecosystems, etc. Air scrubbers with spray of aerosolized sulphur solution were used to remove the ammonia mixed in the airflow ventilated out from a piggery.In this study, numerical method were used to investigate airflow pattern, droplet dispersion, ammonia absorption at droplet surface and overall removal efficiency in an air cleaner. Droplet trajectories and elapsed time in air were adopted to characterize the absorption efficiency, and they were simulated by Eularian-Lagrangian method of Computation Fluid Dynamics (CFD). Realizable k-ε turbulence model were used to simulate airflow turbulence.Strong vortex rotating around the main stream direction were found along the scrubber. To weaken the vortex, the impact of adding a regulating plate or a flow straightener were tested. Impact of nozzle velocity and droplet residue size were analysed. It is found that additional input on the pump pressure to increase the injection velocity may not cause any more benefit in our cases, and the ammonia removal efficiency of the horizontal scrubber is robust on different humidity conditions.",
keywords = "Airflow, Droplet, Evaporation, Residence time, Airflow, Droplet, Evaporation, Residence time",
author = "Li Liu and Nielsen, {Peter Vilhelm} and Heiselberg, {Per Kvols} and Merete Lyngbye and Simon Granath",
note = "Ventilation 2015 is organized by Tongji University, co-organized by Technical Research Center of Finland (VTT) and Tsinghua University. The proceedings is published on a usb.",
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Liu, L, Nielsen, PV, Heiselberg, PK, Lyngbye, M & Granath, S 2015, Numerical Simulations of Airflow and Droplet Dispersion in a Horizontal Ammonia Scrubber. i Q Zhang (red.), The Proceedings of the 11th International Conference on Industrial Ventilation. bind 2, Tongji University, s. 615-623, Shanghai, Kina, 26/10/2015.

Numerical Simulations of Airflow and Droplet Dispersion in a Horizontal Ammonia Scrubber. / Liu, Li; Nielsen, Peter Vilhelm; Heiselberg, Per Kvols; Lyngbye, Merete; Granath, Simon.

The Proceedings of the 11th International Conference on Industrial Ventilation. red. / Qianru Zhang. Bind 2 Tongji University, 2015. s. 615-623.

Publikation: Bidrag til bog/antologi/rapport/konference proceedingKonferenceartikel i proceedingForskningpeer review

TY - GEN

T1 - Numerical Simulations of Airflow and Droplet Dispersion in a Horizontal Ammonia Scrubber

AU - Liu, Li

AU - Nielsen, Peter Vilhelm

AU - Heiselberg, Per Kvols

AU - Lyngbye, Merete

AU - Granath, Simon

N1 - Ventilation 2015 is organized by Tongji University, co-organized by Technical Research Center of Finland (VTT) and Tsinghua University. The proceedings is published on a usb.

PY - 2015

Y1 - 2015

N2 - Ammonia released in pig production industries can lead to eutrophication of surface waters, soil acidification, fertilization of vegetation and changes in ecosystems, etc. Air scrubbers with spray of aerosolized sulphur solution were used to remove the ammonia mixed in the airflow ventilated out from a piggery.In this study, numerical method were used to investigate airflow pattern, droplet dispersion, ammonia absorption at droplet surface and overall removal efficiency in an air cleaner. Droplet trajectories and elapsed time in air were adopted to characterize the absorption efficiency, and they were simulated by Eularian-Lagrangian method of Computation Fluid Dynamics (CFD). Realizable k-ε turbulence model were used to simulate airflow turbulence.Strong vortex rotating around the main stream direction were found along the scrubber. To weaken the vortex, the impact of adding a regulating plate or a flow straightener were tested. Impact of nozzle velocity and droplet residue size were analysed. It is found that additional input on the pump pressure to increase the injection velocity may not cause any more benefit in our cases, and the ammonia removal efficiency of the horizontal scrubber is robust on different humidity conditions.

AB - Ammonia released in pig production industries can lead to eutrophication of surface waters, soil acidification, fertilization of vegetation and changes in ecosystems, etc. Air scrubbers with spray of aerosolized sulphur solution were used to remove the ammonia mixed in the airflow ventilated out from a piggery.In this study, numerical method were used to investigate airflow pattern, droplet dispersion, ammonia absorption at droplet surface and overall removal efficiency in an air cleaner. Droplet trajectories and elapsed time in air were adopted to characterize the absorption efficiency, and they were simulated by Eularian-Lagrangian method of Computation Fluid Dynamics (CFD). Realizable k-ε turbulence model were used to simulate airflow turbulence.Strong vortex rotating around the main stream direction were found along the scrubber. To weaken the vortex, the impact of adding a regulating plate or a flow straightener were tested. Impact of nozzle velocity and droplet residue size were analysed. It is found that additional input on the pump pressure to increase the injection velocity may not cause any more benefit in our cases, and the ammonia removal efficiency of the horizontal scrubber is robust on different humidity conditions.

KW - Airflow

KW - Droplet

KW - Evaporation

KW - Residence time

KW - Airflow

KW - Droplet

KW - Evaporation

KW - Residence time

M3 - Article in proceeding

VL - 2

SP - 615

EP - 623

BT - The Proceedings of the 11th International Conference on Industrial Ventilation

A2 - Zhang, Qianru

PB - Tongji University

ER -

Liu L, Nielsen PV, Heiselberg PK, Lyngbye M, Granath S. Numerical Simulations of Airflow and Droplet Dispersion in a Horizontal Ammonia Scrubber. I Zhang Q, red., The Proceedings of the 11th International Conference on Industrial Ventilation. Bind 2. Tongji University. 2015. s. 615-623