CFD simulation of H2S Scavenger injection
Author
Jørgensen, Emil Tornel
Term
4. semester
Education
Publication year
2019
Submitted on
2019-05-31
Pages
53
Abstract
Behandling af gas, der indeholder svovlbrinte (H2S), kræver typisk et kemisk reagens (scavenger), der binder H2S. Overforbrug ses ofte, når der anvendes en simpel quill-injektor. Dette studie undersøger, hvor længe reagensdråber forbliver i røret og kan nå at reagere, når de injiceres via en dyse. Med CFD-simulationer (computational fluid dynamics) af dyseinjektion i gas med H2S undersøges forskellige indsprøjtningsretninger og ændringer i rørdesign for at vurdere effekten på dråbetransport, blanding og reaktionstid. Simulationerne viser, at større dråber ikke bæres med af strømmen og falder til bunden af røret, mens mindre dråber forbliver i gasstrømmen længe nok til at reagere med H2S. Resultaterne understreger, at dyseretning, dråbestørrelse og rørgeometri er vigtige for effektiv brug af reagenset.
Treating gas that contains hydrogen sulfide (H2S), often called sour gas, typically uses a chemical scavenger that binds H2S. Overdosing is often observed when a simple quill injector is used. This study investigates how long scavenger droplets remain in the pipeline and available to react when injected through a nozzle. Using computational fluid dynamics (CFD) simulations of nozzle injection into H2S-containing gas, we examine different injection directions and changes in pipe design to assess their effects on droplet transport, mixing, and reaction time. The simulations show that larger droplets are not carried by the flow and fall to the bottom of the pipe, while smaller droplets remain suspended long enough to react with H2S. These results highlight the importance of nozzle orientation, droplet size, and pipe geometry for efficient scavenger use.
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