Hauv kev txhim kho cov dej khib nyiab hauv nroog thiab kev lag luam kev kho mob siab heev, ozone generators tau dhau los ua tus qauv xaiv rau cov txheej txheem oxidation siab heev. Tab sis ib yam uas tau ntsib cov tsev tsim qauv thiab cov tswv lag luam cog lus ceeb toom yog tias thaum lub sijhawm thov, lawv tsis tshua yuav lub tshuab hluav taws xob ozone ib leeg. Feem ntau, lawv suav nrog VPSA oxygen cog ua ib feem ntawm tib pob. Qhov no tsis yog tus neeg muag khoom bundling. Qhov laj thawj yog los ntawm cov tshuaj tiv thaiv chemistry thiab kev txheeb xyuas tus nqi ntawm lub neej.
Ozone Synthesis Chemistry Teeb Cov Kev Xav Tau Zoo rau Cov Khoom Noj Roj
Lub tshuab hluav taws xob ozone ua haujlwm los ntawm kev siv lub siab -voltage tawm kom ionize oxygen molecules, rhuav O₂ thiab rov ua dua rau hauv O₃. Yog tias koj pub lub kaw lus nrog cov cua compressed (tsuas yog 21% oxygen), cov nitrogen ntxiv koom nrog cov tshuaj tiv thaiv sab nraud thiab tsim cov nitrogen oxides (NOx). Qhov no tsim ob qho teeb meem. Ua ntej, NOx tsim corrosive nitric acid uas tawm tsam cov hlab ntsha thiab cov ntsaws ruaj ruaj. Thib ob, nitrogen siv lub zog ionization yam tsis tsim cov ozone uas siv tau, ua kom cov qoob loo qis heev.
Tias yog vim li cas txhua tus kws tshaj lij - qib ozone generator xav tau siab - pa oxygen raws li nws cov pa roj. Hauv txoj kev xav, tsa cov pa purity ntawm 21% mus rau saum 90% nce ozone synthesis efficiency exponentially. Qhov no ua rau thawj qhov kev txiav txim siab: cov khoom noj roj txiav txim siab kev lag luam qab nthab ntawm tag nrho cov haujlwm ozone.
VPSA Technical nta thiab haum rau daim ntawv thov no
VPSA sawv cev rau lub tshuab nqus tsev siab viav vias Adsorption. Lub voj voog txheej txheem muaj ob theem. Ntawm atmospheric siab, zeolite molecular sieves xaiv adsorb nitrogen, tso cai rau oxygen kom enriched thiab sau raws li cov khoom roj. Tom qab ntawd lub tshuab nqus tsev twj tso kua mis desorbs lub ntes tau nitrogen, regenerating lub sieve.
Rau cov ntawv thov kev kho dej khib nyiab, VPSA muaj ntau yam kev paub meej.
1. Purity thiab dew point. Lub qhov dej-tsim VPSA system muab 90-95% oxygen tsis tu ncua. Nrog rau kev tshaj tawm zoo-kev kho kom qhuav, cov dej lwg nyob qis dua -60℃. Qhov no ua tau raws li qhov xav tau ntawm lub tshuab hluav taws xob ozone rau kev huv thiab qhuav, tiv thaiv kev ya raws ntawm ozone decomposition lossis dielectric tube tsis ua haujlwm.
2. Load yooj. Cov dej khib nyiab thiab cov khoom tsis huv hloov pauv txhua hnub thiab raws caij nyoog. Ib tsob nroj VPSA tuaj yeem kho cov pa tawm ntawm 60% thiab 100% los ntawm kev hloov pauv lub tshuab nqus cua nkag mus rau cov vanes lossis lub cev muaj zog. Qhov kev hloov pauv no NW nyuam qhuav cuam tshuam rau oxygen purity, tso cai rau lub kaw lus kom phim ozone xav tau meej thiab tsis txhob siv hluav taws xob pov tseg.
3. Kev nyab xeeb. Piv nrog rau cov kua oxygen cia tso tsheb hlau luam, VPSA yog nyob rau ntawm - qhov chaw tsim uas tsis muaj siab - cov hlab ntsha siab, tsis muaj kev phom sij rau lub cev, thiab tsis muaj kev pheej hmoo ntawm cov tsheb thauj khoom. Rau ntau qhov chaw, qhov no ib leeg ua rau VPSA qhov kev xaiv nyiam.
Sab-los ntawm-Sab Sib piv ntawm Cov Khoom Siv Oxygen Main
Hauv kev xyaum ua haujlwm tiag tiag, peb qhov kev xaiv roj pub noj yog suav tias yog VPSA: kua oxygen (LOX) thiab siab -siab PSA. Ib qho kev sib piv ncaj qha qhia tau hais tias qhov twg VPSA haum.
LOX muab purity siab heev (ntau tshaj 99.5%). Tab sis nws qhov tsis muaj zog yog kev vam khom. Rau cov haujlwm nyob deb ntawm cov chaw tsim khoom siv roj, qhov kev pheej hmoo ntawm kev thauj mus los ntawm LOX yog qhov tseem ceeb. Tsis tas li ntawd, LOX tso tsheb hlau luam muaj qhov tsis muaj qhov tsis zoo li qub evaporation poob - kwv yees li 0.5-1% hauv ib hnub txawm tias tsis muaj oxygen siv. Los ntawm qhov kev xav ntawm lub zog ntawm lub cev, LOX twb tau siv hluav taws xob los ntawm huab cua compression, liquefaction, thauj, thiab re-vaporization.
Siab -siab PSA siv tib txoj cai adsorption li VPSA tab sis desorbs ntawm atmospheric siab es tsis txhob nyob rau hauv lub nqus tsev vacuum. Qhov no ua rau cov pa rov qab qis dua - feem ntau 40–50% - piv rau VPSA's 65% lossis siab dua rov qab los ntawm lub tshuab nqus tsev desorption. Qhov feem pua rov qab ncaj qha cuam tshuam rau kev siv hluav taws xob hauv ib chav tsev ntawm cov pa oxygen uas tsim tawm. Rau cov dej khib nyiab ozone khiav ntau dua 20 teev hauv ib hnub, kev txuag hluav taws xob txhua xyoo los ntawm VPSA tuaj yeem cuam tshuam tus nqi pib sib txawv hauv lub sijhawm luv luv. Qhov no tseem ceeb tshwj xeeb tshaj yog nyob rau hauv cov nqi hluav taws xob siab tam sim no.
Cov ntsiab lus tseem ceeb Engineering rau kev sib koom ua ke
Xaiv cov tshuab tsim cov pa oxygen tsim nyog yog qhov tsim nyog tab sis tsis txaus. Kev sib koom ua ke tsis zoo tuaj yeem cuam tshuam kev ua haujlwm ntawm txawm tias cov khoom siv zoo tshaj plaws. Ntau cov ntsiab lus tau yooj yim saib tsis tau tab sis muaj kev txiav txim siab rau qhov kev ntseeg tau ntawm qhov system.
- Oxygen siab txuam thiab boosting. Ib tsob nroj VPSA feem ntau xa cov pa oxygen ntawm ib ncig ntawm 0.05 MPa (gauge). Feem ntau ozone generators xav tau 0.1-0.2 MPa inlet siab. Yog li ntawd, yuav tsum muaj oxygen booster ntawm lawv. Kev siv hluav taws xob thiab kev ntseeg siab ntawm qhov kev txhawb nqa theem no yog lub hauv paus rau tag nrho cov kev pabcuam lub zog siv. Thaum xaiv ib qho kev txhawb zog, xaiv ib qho uas tiv taus ozone kev laus thiab muaj kev sib khi zoo rau kev pabcuam oxygen.
- Inlet cua tso. Qhov kev ua yuam kev no tshwm sim ntau dua li qhov yuav tsum tau ua. Lub tshuab hluav taws xob ozone tus destructor tso tawm cov pa roj ozone tawm - roj. Yog hais tias VPSA cov nroj tsuag cua nkag tau nyob rau hauv nqes hav los yog ze rau qhov chaw tso tawm, lub kaw lus kos nyob rau hauv siab -concentration ozone. Ozone yog ib qho muaj zog oxidizer thiab sai sai rhuav tshem cov zeolite molecular sieve cov qauv siv lead ua. Qhov kev puas tsuaj no yog irreversible thiab yuav ua rau tuag taus engineering yuam kev.
- Dew point tswj nrog redundancy. Thaum -60℃dew point feem ntau tau hais tias txaus, kev paub txog engineering qhia txog ob -stage drying train - refrigerated dryer plus desiccant dryer - muaj kev nyab xeeb dua. Kev saib xyuas cov dej lwg hauv online ntawm cov kab ntsuas tseem ceeb muab kev ceeb toom ntxov ua ntej desiccant breakthrough tso cai rau cov dej noo kom ncav cuag cov nqi hluav taws xob ozone.
Rov qab mus rau lo lus nug tseem ceeb: yog vim li cas cov dej khib nyiab ozone generators feem ntau ua ke nrog VPSA oxygen nroj tsuag? Cov lus teb yog nyob rau hauv lub cev chemistry ntawm ozone synthesis. Lub siab -concentration oxygen pub tsis yog ib qho kev xaiv - nws yog qhov ua ntej rau siab -efficiency, qis- zog, ntev- lub neej ozone oxidation.
Rau ntawm - qhov chaw oxygen mov hauv me me - mus rau - nruab nrab muaj peev xwm ntau yam (zoo rau feem ntau cov ntawv siv dej khib nyiab), VPSA muab kev sib xyaw ua ke zoo tshaj plaws ntawm cov pa oxygen rov qab, thauj khoom hloov pauv yooj yim, thiab tus nqi mus txog lub neej. Cov pa oxygen ua haujlwm tab sis nqa cov saw hlau thiab kev nyab xeeb nyiaj siv ua haujlwm. Siab -siab PSA ua haujlwm tab sis siv zog ntau dua rau tib cov zis. Nkag siab txog qhov kev xav tau no muab cov lus qhia tiag tiag rau kev ua kom zoo tshaj oxidation txheej txheem tsim hauv cov dej khib nyiab.
