Chemische verpakking voor olieraffinage

2025-06-27

In de chemische eenheid operaties zoals destillatie, absorptie, en extractie in olieraffinage bedrijven, specifieke prestaties chemische verpakkingen zijn vereist om massa en warmteoverdracht efficiëntie te optimaliseren. Het volgende is een gedetailleerde beschrijving van de veelgebruikte soorten chemische verpakkingen en hun technische eisen:

I. Veel gebruikte soorten chemische verpakkingen in olieraffinage enterprises

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1. Ringvormige packings

Raschig Ring: Eenvoudige structuur, meestal gemaakt van keramiek, metalen of kunststoffen. Oorspronkelijk gebruikt in destillatie en absorptie torens, maar met een hoge weerstand en een laag rendement. Momenteel worden ze geleidelijk uitgefaseerd.

Pall Ring: Twee lagen rechthoekige gaten worden geopend op de wand van de Raschig Ring, en de binnenste gebogen bladen verbeteren de gas-vloeistof distributie, waardoor de weerstand met ongeveer 50% wordt verminderd en de efficiëntie met 30% wordt verhoogd. Metalen materialen (zoals roestvrij staal) zijn geschikt voor hoge temperatuur, hogedruk en zwavelhoudende media (zoals hydrogeneringseenheden) .

Cascade Mini Ring: Hoogte is slechts de helft van de diameter, met een uitgebreid uiteinde, waardoor het contact tussen verpakkingen en vloeistofdistributie wordt verbeterd. De efficiëntie van de massaoverdracht is 10% tot 20% hoger dan die van de Pall Ring en wordt vaak gebruikt in de initiële destillatiesectie van ruwe olie-destillatietoren.

2. Zadelvormig packings

Arc (Berl-zadel): keramisch materiaal, met een gebogen oppervlak. De vloeistofverdeling is uniformer dan die van de ringvormige verpakkingen, maar is vatbaar voor stapelen, wat resulteert in een afname in efficiëntie. Het wordt nu minder gebruikt.

Intalox-zadel (rechthoekig zadel): verbetert de symmetrische structuur van het boogzadel om stapelen te voorkomen, heeft een hogere holteverhouding en is bestand tegen erosie. Het is geschikt voor absorptietorens (zoals ontzwavelingstorens), en het keramische materiaal is bestand tegen zure media (zoals HS).

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Metal Intalox Ring (Metal Saddle): Combineert de voordelen van ringvormige en zadelvormige verpakkingen, heeft een hoge openingssnelheid, groot debiet en lage drukval. Het is geschikt voor de belangrijkste fractionerende toren van katalytische kraakeenheden en het hanteren van olie-gasmengsels met hoge belasting.


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3. Plastic reguliere verpakking packings

Material is PP, PVC, enz., lichtgewicht, bestand tegen corrosie bij lage temperatuur, geschikt voor normale temperatuur ontzwavelingstorens (zoals ethanolamine-methode voor HS-verwijdering), maar niet bestand tegen hoge temperaturen (meestal 120 ℃). Ze worden minder gebruikt in olieraffinage.


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