Hauv kev lag luam roj sib cais, nitrogen tiam technology tseem yog ib qho tseem ceeb rau cov engineers. Thaum xaiv cov tshuaj nitrogen tiam, thawj lo lus nug feem ntau nug yog: qhov twg ua haujlwm zoo dua rau kuv cov xwm txheej tshwj xeeb -PSA lossis daim nyias nyias? Thiab purity yog ib qho tseem ceeb ntawm qhov kev txiav txim siab ntawd. Hauv kev ua haujlwm tiag tiag hauv ntiaj teb, qhov sib txawv ntawm PSA nitrogen generators thiab membrane nitrogen sib cais tuaj yeem nyob ntawm 0.5% mus rau ntau dua 3%, nyob ntawm qhov kev teeb tsa, kev ua haujlwm, thiab kev saib xyuas. Cia peb rhuav qhov no los ntawm ob lub ces kaum: kev ua haujlwm thiab kev ua haujlwm tiag tiag.
Cov Ntsiab Cai Ua Haujlwm txhais tau tias Lub Cev Purity
PSA (Pressure Swing Adsorption) tso siab rau carbon molecular sieves. Qhov tseem ceeb yog qhov sib txawv ntawm qhov sib txawv ntawm cov pa oxygen thiab nitrogen molecules -oxygen molecules me me, diffuse sai dua, thiab tau txais adsorbed nyiam; nitrogen molecules me ntsis loj dua, siv sij hawm ntev dua los ntawm lub txaj, thiab ua kom muaj zog ntawm qhov hluav taws xob. Los ntawm alternating pressurization thiab depressurization ntawm ob lub adsorption yees, PSA muab cov khoom tso tawm tsis tu ncua nitrogen. PSA qhov zoo ntawm purity yog qhov tseeb: los ntawm kev kho cov voj voog adsorption, siab tsis, thiab sieve loading, nws tuaj yeem tsim nitrogen los ntawm 95% mus txog 99.999% lossis ntau dua.
Membrane sib cais ua haujlwm txawv. Hollow fiber ntau siv cov ntaub ntawv polymer uas siv qhov sib txawv ntawm cov pa roj permeation. Oxygen, dej vapor, thiab lwm yam "gas ceev" permeate sai los ntawm cov phab ntsa membrane thiab yog vented; nitrogen permeates maj mam thiab taug kev raws cov fiber ntau lumen los ua cov khoom siv roj. Membrane sib cais feem ntau caps tawm ntawm 95% thiab 99.5%. Tshaj li 99.5%, kev ua tau zoo thiab tus nqi-kev ua tau zoo poob qis vim tias kev ua tiav cov purity siab dua yuav tsum muaj qhov ntau dua ntawm daim nyias nyias los yog txo qhov ntws tawm -kev lag luam tsis zoo.
Lub Purity Gap Loj npaum li cas hla ntau qhov sib txawv?
Cia peb saib cov purity brackets:
95% - 98% - Ob lub thev naus laus zis ua haujlwm zoo. Membrane systems muab kev siv hluav taws xob qis dua, tsim qauv tsim, thiab tsis muaj qhov txav mus los - pom qhov zoo ntawm no. PSA kuj tseem siv tau tab sis tej zaum yuav muaj cov cuab yeej siv siab dua me ntsis rau ib chav ntawm cov zis.
99% - 99.5% - Membrane tau nce mus txog nws qhov kev txwv. Yuav kom xa tau 99.5%, cov membrane modules xav tau qhov zoo tshaj plaws inlet tej yam kev mob - nruj tswj qhov kub thiab txias, siab, thiab ntws- thiab cov zis yuav pom tau qis dua li PSA piv. PSA ua haujlwm zoo li no, uas yog vim li cas ntau tus neeg siv kev lag luam ua haujlwm ntawm no.
99.9% thiab siab dua - Qhov no yog kab sib faib. Membrane systems tsis tshua muaj kev ruaj khov 99.9% purity dhau sijhawm. Txawm hais tias lawv ua, cov zis poob rau ib feem ntawm PSA chav tsev ntawm tib qhov loj, ua rau kev lag luam tsis zoo. PSA tswj hwm 99.9%–99.999% ntau yam-cov ntawv thov xws li kev tsim khoom siv hluav taws xob, kev kho cua sov, hmoov metallurgy, thiab nitrogen flushing rau ntim zaub mov tag nrho cia siab rau qhov no.
Kev sib piv ceev: Rau qhov system ntsuas ntawm 100 Nm³ / h xav tau 99.5% purity, PSA thiab daim nyias nyias tuaj yeem ua haujlwm. Tab sis yog tias koj nce qhov yuav tsum tau mus rau 99.9%, cov txheej txheem membrane cov txiaj ntsig zoo yuav poob mus rau 30-50 Nm³ / h, thaum lub PSA chav tsev tsuas yog xav tau kev hloov pauv me me kom tswj tau cov zis ruaj khov.
Dab tsi cuam tshuam qhov dav lossis qhov sib txawv?
Inlet cua zoo thiab pretreatment. Ob lub thev naus laus zis xav tau kom qhuav, huv si compressed cua. Cov roj ntau dhau, dej, lossis plua plav yuav paug cov fibers hauv daim nyias nyias, txo cov permeation xaiv thiab ua rau purity poob qis heev. PSA carbon sieves kuj tuaj yeem raug tshuaj lom thiab poob haujlwm. Qhov txawv ntawm qhov tseem ceeb: daim nyias nyias yog rhiab heev rau cov roj pos huab, thiab ib zaug kis kab mob, lawv nyuaj heev rau rov tsim dua tshiab -tseem ceeb yog ib qho - lub sij hawm poob. Carbon sieves, tom qab kho cov inlet tej yam kev mob, ib feem rov qab los ntawm regeneration cycles.
Kev khiav hauj lwm kub thiab siab. Membrane kev ua tau zoo yog kub heev -sensitive. Qhov zoo tshaj plaws yog feem ntau 20-45 degree. Sab nraum qhov no, kev sib cais kev ua tau zoo poob qis, thiab purity fluctuates. PSA tswj cov kev hloov pauv kub zoo dua- tsuav yog qhov rwb thaiv tsev txaus, qhov kev hloov pauv ib puag ncig muaj qhov cuam tshuam tsawg dua rau kev huv.
Tsim cov paj thiab ntev - lub sij hawm ruaj khov. Ntau tus neeg siv pom tias cov tshuab membrane ua tsis tau raws li lub hom phiaj purity tom qab ob lossis peb xyoos. Lub hauv paus ua rau yog maj mam nkag mus thiab cov kab mob sib kis nyob rau hauv cov khoom siv membrane-natural kev ua tau zoo lwj. Rau lub PSA system uas muaj qhov loj me me sieve txaj thiab zoo- kaw li qub, purity tuaj yeem nyob ruaj khov rau tsib mus rau yim xyoo lossis ntev dua. Shenger Gas tau pom nyob rau hauv xyoo dhau los ntawm kev ua haujlwm rau cov neeg siv khoom lag luam uas nyob rau hauv tib qhov kev xav tau purity tib yam, PSA cov cuab yeej feem ntau muab ib qib siab dua ntev dua - lub sij hawm ruaj khov dua li cov tshuab membrane.
Cov lus qhia xaiv: Tsis txhob tsom mus rau tus lej Purity nkaus xwb
Yog tias koj qhov kev ua haujlwm tsuas yog xav tau 95%–99% nruab nrab-rau- tsis muaj purity nitrogen- piv txwv li, lub log tsheb, kev tiv thaiv hluav taws kub, lossis qee yam tshuaj lom neeg pam vov -kev sib cais ntawm cov membrane yog tsim nyog xav txog. Nws yog qhov yooj yim, yuav luag txij nkawm - dawb, thiab pib sai.
Tab sis yog tias koj cov txheej txheem xav tau cov nitrogen purity ruaj khov siab dua 99.5%, lossis muaj kev txwv nruj ntawm cov pa seem (xws li cov khoom siv hluav taws xob reflow soldering, hlau kho cua sov tiv thaiv huab cua, lossis cov tshuaj tswj cov pa oxygen), ces PSA nitrogen generators yog cov khoom pov thawj tshaj plaws thiab cov nqi{1}} siv tau ntev - cov tshuaj. Rau 99.9% thiab siab dua, tsis muaj kev sib cav tiag tiag -PSA yog tib txoj kev xaiv.
Ib qho ntxiv feem ntau tau saib xyuas: qhov tseeb kev ua haujlwm purity tsis zoo ib yam li cov ntawv teev npe. Qee cov txheej txheem membrane kuaj ntawm 99.9% thaum lub Hoobkas lees txais, tab sis tom qab kev teeb tsa-nrog rau qhov hloov pauv ntawm qhov nkag thiab hloov qhov kub thiab txias ambient-tiag tiag- ntiaj teb purity tuaj yeem poob qis dua 99%. PSA, ua tsaug rau qhov tsis yog -linear xwm txheej ntawm cov txheej txheem adsorption, zam qhov kev hloov pauv nkag tau zoo dua nyob rau hauv qee qhov ntau.
Hauv qhov qis - txog - nruab nrab purity range, qhov sib txawv me me. Tshaj 99.5%, qhov sib txawv hloov ntawm "me" mus rau "tseem ceeb." Thiab ntawm 99.9% thiab siab dua, nws dhau los ua cov lus nug ntawm seb lub tshuab puas tuaj yeem ua txoj haujlwm txhua. Qhov tseem ceeb tsis yog lub tshuab twg yog "zoo dua"- nws yog qhov purity theem koj cov txheej txheem xav tau tiag tiag thiab nws yuav tsum tuav qhov purity li cas. Thaum koj muaj cov lus teb ntawd, qhov kev xaiv raug yuav pom tseeb.
