Resumé
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.
Originalsprog | Engelsk |
---|---|
Titel | The Proceedings of the 11th International Conference on Industrial Ventilation |
Redaktører | Qianru Zhang |
Antal sider | 9 |
Vol/bind | 2 |
Forlag | Tongji University |
Publikationsdato | 2015 |
Sider | 615-623 |
Kapitel | Topic 3. Industrial Ventilation and Pollutant Control |
Status | Udgivet - 2015 |
Begivenhed | The 11th International Conference on Industrial Ventilation - Shanghai, Kina Varighed: 26 okt. 2015 → 28 okt. 2015 Konferencens nummer: 11 |
Konference
Konference | The 11th International Conference on Industrial Ventilation |
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Nummer | 11 |
Land | Kina |
By | Shanghai |
Periode | 26/10/2015 → 28/10/2015 |
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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
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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 proceeding › Konferenceartikel i proceeding › Forskning › peer 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 -