Nitrogen Series (II) Kev Npaj Nitrogen

Nitrogen ntau lawm Manufacturers - Tuam Tshoj Nitrogen ntau lawm Hoobkas & lwm (xinfatools.com)

Nitrogen yog qhov tseem ceeb ntawm huab cua, suav txog li 78% ntawm huab cua. Elemental nitrogen N2 yog cov roj tsis muaj xim thiab tsis muaj ntxhiab nyob rau hauv ib txwm muaj. Gas ceev nyob rau hauv lub xeev tus qauv yog 1.25 g / L. Lub melting point yog -210 ℃ thiab lub boiling point -196 ℃. Cov kua nitrogen yog cov tub yees txias (-196 ℃).

Niaj hnub no peb yuav qhia ntau txoj hauv kev los tsim cov nitrogen hauv tsev thiab txawv teb chaws.

Muaj peb txoj kev lag luam-scale nitrogen ntau lawm: cryogenic huab cua sib cais nitrogen ntau lawm, siab viav vias adsorption nitrogen ntau lawm, thiab membrane sib cais nitrogen ntau lawm.

Ua ntej: Cryogenic cua cais nitrogen ntau lawm txoj kev

Cryogenic huab cua sib cais nitrogen ntau lawm yog ib txwm siv nitrogen ntau lawm txoj kev nrog keeb kwm ntawm ze li ob peb xyoo lawm. Nws siv cov huab cua ua raw khoom, compresses thiab purifies nws, thiab tom qab ntawd siv cov cua sov pauv los liquefy huab cua rau hauv cov kua cua. Cov huab cua ua kua feem ntau yog sib xyaw ua kua oxygen thiab kua nitrogen. Cov ntsiab lus kub sib txawv ntawm cov kua oxygen thiab kua nitrogen yog siv los cais lawv los ntawm distillation ntawm kua cua kom tau nitrogen.

Qhov zoo: loj roj ntau lawm thiab siab purity ntawm cov khoom nitrogen. Cryogenic nitrogen ntau lawm tuaj yeem tsim tsis tsuas yog nitrogen tab sis kuj ua kua nitrogen, uas ua tau raws li cov txheej txheem ntawm cov kua nitrogen thiab tuaj yeem khaws cia rau hauv cov kua nitrogen cia tank. Thaum muaj qhov sib cuam tshuam ntawm nitrogen load lossis kho me me ntawm cov khoom siv cua sib cais, cov kua nitrogen hauv lub tank cia nkag mus rau lub vaporizer thiab cua sov, thiab tom qab ntawd xa mus rau cov khoom siv nitrogen pipeline kom tau raws li qhov xav tau nitrogen ntawm cov txheej txheem. Lub voj voog ua haujlwm ntawm cryogenic nitrogen ntau lawm (xa mus rau lub sijhawm nruab nrab ntawm ob lub cua sov loj) feem ntau yog ntau tshaj 1 xyoos, yog li ntawd cov khoom siv cryogenic nitrogen feem ntau tsis suav tias yog qhov chaw tos txais.

Qhov tsis zoo: Cryogenic nitrogen ntau lawm tuaj yeem tsim cov nitrogen nrog purity ntawm ≧99.999%, tab sis cov purity ntawm nitrogen yog txwv los ntawm nitrogen load, tus naj npawb ntawm cov tais, tais efficiency thiab oxygen purity nyob rau hauv cov kua huab cua, thiab kev hloov ntau yam tsawg heev. Yog li ntawd, rau ib txheej ntawm cov khoom siv cryogenic nitrogen ntau lawm, cov khoom purity yog qhov yooj yim thiab tsis yooj yim los kho. Txij li cov txheej txheem cryogenic tau ua tiav ntawm qhov kub tsis tshua muaj siab, cov cuab yeej yuav tsum muaj cov txheej txheem ua ntej pib txias ua ntej nws muab tso rau hauv ib txwm ua haujlwm. Lub sij hawm pib, uas yog, lub sij hawm txij thaum pib ntawm lub expander mus rau lub sij hawm thaum lub nitrogen purity ncav cuag qhov yuav tsum tau, feem ntau tsis tsawg tshaj li 12 teev; Ua ntej cov cuab yeej nkag mus rau hauv kev kho dua tshiab, nws yuav tsum muaj lub sijhawm cua sov thiab lub sijhawm thawing, feem ntau 24 teev. Yog li ntawd, cov khoom siv cryogenic nitrogen ntau lawm yuav tsum tsis txhob pib thiab nres tsis tu ncua, thiab nws raug nquahu kom ua haujlwm tsis tu ncua rau lub sijhawm ntev.

Tsis tas li ntawd, cov txheej txheem cryogenic yog complex, occupies ib tug loj cheeb tsam, muaj high infrastructure nqi, yuav tsum tau tshwj xeeb tu tub rog, muaj ib tug loj tus naj npawb ntawm cov neeg ua hauj lwm, thiab ua rau cov roj maj mam (18 mus rau 24 teev). Nws yog tsim rau loj-scale industrial nitrogen ntau lawm.

Thib ob: Siab Swing Adsorption (PSA) Nitrogen Production Method

Pressure Swing Adsorption (PSA) roj sib cais tshuab yog ib ceg tseem ceeb ntawm cov tshuab tsis-cryogenic gas sib cais. Nws yog qhov tshwm sim ntawm tib neeg txoj kev siv zog mus sij hawm ntev los nrhiav txoj kev sib cais huab cua yooj yim dua li txoj kev cryogenic.

Nyob rau xyoo 1970, West German Essen Mining Company tau ua tiav cov pa roj carbon molecular sieves, paving txoj kev rau industrialization ntawm PSA huab cua sib cais nitrogen ntau lawm. Tshaj li 30 xyoo dhau los, cov cuab yeej no tau tsim thiab loj hlob sai. Nws tau dhau los ua tus neeg sib tw muaj zog ntawm kev sib cais ntawm huab cua cryogenic hauv thaj tsam ntawm cov khoom me me thiab nruab nrab ntawm nitrogen.

Siab viav vias adsorption nitrogen ntau lawm siv cua ua raw khoom thiab carbon molecular sieve li adsorbent. Nws siv cov yam ntxwv ntawm carbon molecular sieve xaiv adsorption ntawm oxygen thiab nitrogen nyob rau hauv cov huab cua, thiab siv lub hauv paus ntsiab lus ntawm siab viav vias adsorption (siab adsorption, siab txo desorption thiab molecular sieve regeneration) cais oxygen thiab nitrogen nyob rau hauv chav tsev kub los tsim nitrogen.

Piv nrog rau cryogenic huab cua sib cais nitrogen ntau lawm, siab viav vias adsorption nitrogen ntau lawm muaj qhov zoo tshaj plaws: kev sib cais adsorption yog nqa tawm ntawm chav tsev kub, txheej txheem yog yooj yim, cov cuab yeej compact, hneev taw me me, nws yooj yim pib thiab nres, nws pib sai, cov roj ntau lawm yog ceev (feem ntau txog 30 feeb), lub zog noj me me, kev khiav hauj lwm tus nqi qis, qib ntawm automation siab, kev khiav hauj lwm thiab kev saib xyuas yog yooj yim, lub skid installation yog yooj yim, tsis muaj lub hauv paus tshwj xeeb. yuav tsum tau, cov khoom nitrogen purity yuav raug kho nyob rau hauv ib tug tej yam ntau yam, thiab cov nitrogen ntau lawm yog ≤3000Nm3 / h. Yog li ntawd, siab viav vias adsorption nitrogen ntau lawm yog tshwj xeeb tshaj yog haum rau kev ua haujlwm tsis sib xws.

Txawm li cas los xij, kom deb li deb, cov neeg ua haujlwm hauv tsev thiab txawv teb chaws tuaj yeem tsim cov nitrogen nrog purity ntawm 99.9% (ie, O2≤0.1%) siv PSA nitrogen ntau lawm technology. Qee lub tuam txhab tuaj yeem tsim 99.99% ntshiab nitrogen (O2≤0.01%). Kev purity siab dua yog ua tau los ntawm qhov kev xav ntawm PSA nitrogen ntau lawm technology, tab sis cov nqi ntau lawm yog siab dhau lawm thiab cov neeg siv tsis zoo li yuav txais nws. Yog li ntawd, kev siv PSA nitrogen ntau lawm technology los tsim high-purity nitrogen yuav tsum tau ntxiv ib tug tom qab-theem purification ntaus ntawv.

Nitrogen purification method (kev lag luam nplai)

(1) Hydrogenation deoxygenation txoj kev.

Nyob rau hauv qhov kev txiav txim ntawm lub catalyst, cov seem oxygen nyob rau hauv cov nitrogen reacts nrog ntxiv hydrogen los tsim dej, thiab cov tshuaj tiv thaiv mis yog: 2H2 + O2 = 2H2O. Tom qab ntawd, cov dej raug tshem tawm los ntawm lub zog siab nitrogen compressor booster, thiab lub siab purity nitrogen nrog cov ntsiab lus hauv qab no tau txais los ntawm kev ziab tom qab: N2≥99.999%, O2≤5 × 10-6, H2≤1500 × 10-6, H2O≤10.7 × 10-6. Tus nqi ntawm nitrogen ntau lawm yog kwv yees li 0.5 yuan / m3.

(2) Hydrogenation thiab deoxygenation txoj kev.

Txoj kev no tau muab faib ua peb theem: thawj theem yog hydrogenation thiab deoxygenation, theem ob yog dehydrogenation, thiab theem peb yog dej tshem tawm. High-purity nitrogen nrog cov hauv qab no muaj pes tsawg leeg: N2 ≥ 99.999%, O2 ≤ 5 × 10-6, H2 ≤ 5 × 10-6, H2O ≤ 10.7 × 10-6. Tus nqi ntawm nitrogen ntau lawm yog hais txog 0.6 yuan / m3.

(3) Cov txheej txheem carbon deoxygenation.

Nyob rau hauv qhov kev txiav txim ntawm carbon-txhawb catalyst (ntawm ib tug tej yam kub), cov residual oxygen nyob rau hauv dog dig nitrogen reacts nrog cov pa roj carbon muab los ntawm lub catalyst nws tus kheej los tsim CO2. Reaction formula: C + O2 = CO2. Tom qab cov theem tom ntej ntawm kev tshem tawm CO2 thiab H2O, high-purity nitrogen nrog cov hauv qab no muaj pes tsawg leeg: N2 ≥ 99.999%, O2 ≤ 5 × 10-6, CO2 ≤ 5 × 10-6, H2O ≤ 10.7 × 10-6. Tus nqi ntawm nitrogen ntau lawm yog hais txog 0.6 yuan / m3.

Thib peb: Membrane sib cais thiab huab cua sib cais nitrogen ntau lawm

Membrane sib cais thiab huab cua sib cais nitrogen ntau lawm kuj yog ib ceg tshiab ntawm non-cryogenic nitrogen ntau lawm technology. Nws yog ib txoj kev tsim cov nitrogen tshiab uas tau tsim tawm sai heev rau txawv teb chaws hauv xyoo 1980s. Nws tau raug txhawb nqa thiab siv hauv Suav teb xyoo tas los no.

Membrane sib cais nitrogen ntau lawm siv cua ua raw khoom. Nyob rau hauv ib lub siab, nws siv qhov sib txawv permeation tus nqi ntawm oxygen thiab nitrogen nyob rau hauv hollow fiber membrane cais oxygen thiab nitrogen los tsim nitrogen. Piv nrog rau saum toj no ob txoj kev tsim cov nitrogen, nws muaj cov yam ntxwv ntawm cov cuab yeej siv yooj yim, ntim me me, tsis muaj qhov hloov pauv, kev ua haujlwm yooj yim thiab kev saib xyuas, kev tsim roj sai dua (hauv 3 feeb), thiab muaj peev xwm nthuav dav dua.

Txawm li cas los xij, hollow fiber ntau daim nyias nyias muaj cov kev cai nruj dua ntawm kev huv ntawm cov cua compressed. Cov daim nyias nyias yog qhov yooj yim rau kev laus thiab tsis ua haujlwm, thiab nyuaj rau kho. Cov membrane tshiab yuav tsum tau hloov.

Membrane sib cais nitrogen ntau lawm yog tsim nyog rau me me thiab nruab nrab cov neeg siv nrog nitrogen purity yuav tsum ≤98%, thiab muaj qhov zoo tshaj plaws ua hauj lwm-tus nqi piv rau lub sij hawm no; Thaum lub purity nitrogen yuav tsum siab tshaj 98%, nws yog hais txog 30% siab tshaj lub siab viav vias adsorption nitrogen ntau lawm ntaus ntawv ntawm tib specification. Yog li ntawd, thaum high-purity nitrogen yog tsim los ntawm kev sib txuas cov membrane sib cais nitrogen ntau lawm thiab nitrogen purification li, lub purity ntawm cov nitrogen feem ntau yog 98%, uas yuav ua rau kom tus nqi ntau lawm thiab cov nqi khiav hauj lwm ntawm cov khoom purification.