Zaj dab neeg ntawm PSA oxygen generator

Siab viav vias adsorption (PSA) tsis yog cov txheej txheem tshiab thiab, zoo li feem ntau cov khoom tsim tau zoo, nrog rau qhov zoo ntawm hindsight lub hauv paus ntsiab lus pom tseeb. Raws li nyob rau hauv tag nrho cov txheej txheem sib cais adsorption, qhov tseem ceeb yuav tsum tau 1s ib qho adsor-khoov uas nyiam adsorbs ib feem (los yog ib tsev neeg ntawm cov khoom muaj feem xyuam) los ntawm mxed pub. Qhov kev xaiv no tuaj yeem nyob ntawm qhov sib txawv ntawm qhov sib npaug ntawm qhov sib npaug lossis ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv (kinctic selectivity). Hauv qee kis, qhov sib txawv ntawm cov nqi yuav zoo heev uas cov kab qeeb-difusing IsS hauv cov nyhuv tag nrho tsis suav nrog cov adsorbent (size-xaiv sieving), thiab 1n qhov xwm txheej no muaj kev sib cais zoo heev tuaj yeem ua tiav obvlously.

Tag nrho cov txheej txheem sib cais adsorption suav nrog ob kauj ruam tseem ceeb:

(1) adsorp-tton, thaum lub sij hawm uas nyiam adsorbed specles plcked koj los ntawm pub;
(2) regeneration los yog desorption, thaum lub sij hawm cov tsiaj no raug tshem tawm ntawm lub adsorbent, yog li "regenerating" cov adsorbent rau siv nyob rau hauv lub tom ntej no voj voog. pab tau cov khoom los ntawm cither cov adsorption los yog regeneration kauj ruam los yog los ntawm ob kauj ruam. Lub effuent nyob rau hauv lub adsorpton kauj ruam yog purifed rafinate "cov khoom uas nyiam tshaj adsorbed sDecies tau raug tshem tawm. Cov desorbate uas tau zoo lawm thaum lub sij hawm regeneration kauj ruam muaj ntau zog adsorbed speces m concentrated daim ntawv (kwv yees rau pub) thiab qee zaum hu ua tus "extract" khoom.

Qhov tseem ceeb ntawm cov txheej txheem PSA yog tias, thaum lub sij hawm rov tsim dua tshiab, cov hom adsorbed nyiam raug tshem tawm los ntawm kev txo tag nrho lub siab, es tsis yog los ntawm kev nce qhov kub los yog purging nrog kev hloov chaw.

Lub tswvyim ntawm tus txheej txheem PSA.(a)Chinge m cquilibrum loading nrog prcsure.(h) idcalized sketch uas qhia mtwement ol lub adsorheu phse cnceiration profilc rau lub nore muaj zog udsorbed spccies nyob rau hauv ib tug stmple ob-txaj PSA txheej txheem.

tus neeg saib xyuas (txawm hais tias qhov kev tshem tawm qis qis feem ntau muaj nyob rau hauv lub voj voog) Cov txheej txheem ua haujlwm nyob rau hauv kwv yees li isothermal tej yam kev mob kom lub peev xwm muaj txiaj ntsig yog qhov sib txawv ntawm kev thauj khoom ntawm ob lub ntsiab lus, sib xws rau kev pub noj thiab kev rov tsim dua tshiab, ntawm tib isotherm [ Daim duab 1.1(a)l.Daim duab 1.1(b) qhia schematically lub zog ntawm cov concentration profiles thaum lub sij hawm lub high-pressure feed thiab low-pressure regeneration kauj ruam.Cov kauj ruam pub yog ib txwm raug txiav ua ntej lub zog adsorbed feem ntau tawg los ntawm lub txaj, Thaum lub sij hawm rov tsim dua tshiab feem ntau raug txiav ua ntej lub txaj yog tag nrho desorbed.Ntawm cyclic khov kho lub xeev cov profle yog li oscillates txog ib tug txhais tau tias postion nyob rau hauv lub txaj.

 

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Ib qho txiaj ntsig tseem ceeb ntawm PSA, rclative rau lwm yam txheej txheem adsorption xws li thermal viav vias, yog tias thc siab tuaj yeem hloov pauv sai dua li qhov kub thiab txias, yog li ua rau nws muaj peev xwm ua haujlwm PSA txheej txheem ntawm lub voj voog nrawm dua, yog li ua kom cov thoob plaws hauv ib chav tsev ntawm adsorbent txaj ntim.Qhov kev txwv loj yog tias cov txheej txheem PSA raug txwv rau cov khoom uas tsis muaj zog adsorbed.Yog cov hom nyiam-tially adsorbed yog cov adsorbed ntau dhau lawm, yuav tsum muaj lub tshuab nqus tsev tsis zoo los ua kom lub cev desorption thaum lub sijhawm rov tsim dua tshiab. step.Yog li, rau cov khoom siv adsorbed zoo heev thermai viav vias feem ntau yog qhov nyiam opton txij li kev hloov pauv ntawm qhov kub thiab txias tsim, feem ntau, kev hloov pauv loj hauv cov roj-khoom adsorption cauilibrum tas li.

Cov txheej txheem PSA tsis yog qhov nyuaj tshaj li feem ntau ntawm cov txheej txheem sib cais ntau dua, tab sis lawv txawv ntawm ib qho tseem ceeb: PTOCess Ua haujlwm nyob rau hauv cov xwm txheej dhau los, feem ntau cov txheej txheem xws li nqus, rho tawm, thiab distitation ua haujlwm nyob rau hauv cov xwm txheej tsis tu ncua.

Raws li qhov tshwm sim, ob qho tib si lub tswv yim thiab cov txheej txheem tsim yog txawv heev. Qhov sib txawv no tuaj yeem piav qhia tau zoo tshaj plaws hauv kev ua lej.Ib qho txheej txheem khov kho hauv xeev tuaj yeem piav qhia txog lej los ntawm kev ua lej zoo tib yam (lossis txheej txheej ntawm qhov sib npaug sib npaug), thiab kom tau txais kev sib raug zoo ntawm kev ua haujlwm sib txawv thiab cov txheej txheem kev ua tau zoo reauires nkaus xwb. Kev sib xyaw ua ke ntawm cov kab zauv sib npaug no.Los ntawm qhov sib piv, cov txheej txheem ntu ntu tau piav qhia los ntawm sct ntawm ib feem ntawm qhov sib npaug sib npaug thiab qhov no yuav tsum muaj cov txheej txheem kev daws teeb meem nyuaj dua.Vim li ntawd qhov kev sib raug zoo ntawm cov txheej txheem kev ua tau zoo thiab kev ua haujlwm varlables feem ntau tsis pom tseeb. Cov txheej txheem lossis kev tsim thiab scalcup ntawm PSA unts yog rau feem ntau muaj nyob rau hauv cov ntaub ntawv qhib.Txawm li cas los xij, lawv tseem tsis tau txais feem ntau raws li ib feem ntawm cov txheej txheem tshuaj engi neering thiab, vim li ntawd, qee qhov huab cua ntawm kev paub tsis meej tshwm sim. .

Desptte therr pib thaum ntxov, nws tsuas yog thaum xyoo 1980s uas cov txheej txheem PSA tau txais kev lag luam thoob plaws.Qhov no yog qhia hauv daim duab 1.2, uas qhia txog cov phiaj xwm txhua xyoo ntawm cov ntawv tshaj tawm thiab USpatents ntsig txog PSA cov txheej txheem tawm tsam xyoo. Cov laj thawj rau nws qhov kev ncua ntev ntev ntawm kev tsim khoom thiab kev ua lag luam ntawm cov txheej txheem no tsis meej meej, tab sis nws zoo li tias qhov kev tawm tsam ntawm kev txaus siab nyob rau hauv kev lag luam roj cryogentc thiab tsis paub txog cov hauv paus ntsiab lus ntawm kev xyaum engineers yog qhov tseem ceeb. yam. Thaum lub sijhawm xyoo 1970s kev txaus siab rau lwm txoj kev sib cais Dro-cesses tau tshwm sim los ntawm kev nce ntawm cov nqi hluav taws xob cuam tshuam nrog kev nce nqi ntawm cov roj crude.Txawm hais tias cov nqi hluav taws xob poob thaum xyoo 1980, lub zog los tshuaj xyuas lwm cov txheej txheem thiab kom phim cov cuab yeej rau cov khoom specifications. tau txuas ntxiv mus.