.Lub denitrification unit tshem tawm cov nitrogen ntawm cov roj av los npaj rau kev xa mus rau hauv cov kav dej. Raws li cov ntaub ntawv ntawm Lub Tsev Kawm Ntawv Tshawb Fawb Txog Roj Av, 17% ntawm cov roj av khaws cia hauv Tebchaws Meskas muaj cov ntsiab lus nitrogen ntau. Feem ntau cov qauv kav dej xav kom cov ntsiab lus nitrogen hauv cov roj av tsawg dua 4%. Cov roj av nitrogen ntau yog qhov tsis ruaj khov vim tias nws tsis tuaj yeem thauj mus rau kev ua lag luam los ntawm cov kav dej. Yog tias muaj nitrogen ntau dhau hauv cov kav dej, muaj kev pheej hmoo ntawm cov roj ntsaws lossis kev kub hnyiab tsis zoo. Nitrogen kuj ua rau cov nqi calorific ntawm cov roj tsis zoo, ua rau BTU thiab nws tus nqi qis dua.
Vim tias nitrogen (N2) thiab methane (CH4) muaj qhov loj me zoo sib xws thiab cov dielectric tsis tu ncua, thiab tsis muaj kev xaiv reactivity, xws li carbon dioxide lossis hydrogen sulfide hauv amine units, denitrification yog qhov nyuaj rau kev sib cais.
Kev nqus dej ntawm lub zog siab (PSA), kev sib cais kub qis thiab kev nqus roj tsawg tau siv los tshem tawm nitrogen ntawm cov roj ntuj.
Kev nqus dej siab (PSA) siv cov adsorbent los xaiv cov khoom siv. cais cov nitrogen ntawm methaneCov roj ces rov tsim dua los ntawm cov adsorbent los ntawm kev sib xyaw ua ke ntawm kev hloov pauv siab thiab thermal. PSA yog siv rau kev ua kom cov roj qhuav, tshem tawm cov pa roj carbon dioxide, denitrification thiab hydrocarbon dew point tswj.
Kev sib cais cryogenic siv cryogenic Thermodynamic Separation Raws li cov ntsiab lus kub sib piv ntawm methane (- 259° F) thiab nitrogen (- 320° F). Thaum cov khoom sib xyaw txias, methane yuav condense ua ntej nitrogen, yog li cais ob qho tib si.
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