Generating Nitrogen With Pressure Swing Adsorption (PSA) Technology

Lub Siab Swing Adsorption ua haujlwm li cas?

Thaum tsim koj tus kheej nitrogen, nws yog ib qho tseem ceeb kom paub thiab nkag siab txog qib purity koj xav ua kom tiav.Qee daim ntawv thov yuav tsum muaj qib purity tsawg (nruab nrab ntawm 90 thiab 99%), xws li lub log tsheb nce thiab tiv thaiv hluav taws, thaum lwm tus, xws li cov ntawv thov hauv kev lag luam khoom noj thiab dej haus lossis yas molding, yuav tsum muaj qib siab (ntawm 97 txog 99.999%).Hauv cov xwm txheej no PSA thev naus laus zis yog txoj hauv kev zoo tshaj plaws thiab yooj yim mus.

Hauv qhov tseem ceeb, lub tshuab hluav taws xob nitrogen ua haujlwm los ntawm kev sib cais cov nitrogen molecules los ntawm cov pa oxygen molecules hauv huab cua compressed.Siab viav vias Adsorption ua qhov no los ntawm kev ntxiab oxygen los ntawm cov cua compressed siv adsorption.Adsorption tshwm sim thaum cov molecules khi lawv tus kheej rau ib qho adsorbent, qhov no cov pa oxygen molecules txuas rau carbon molecular sieve (CMS).Qhov no tshwm sim hauv ob lub nkoj siab sib cais, txhua qhov ntim nrog CMS, uas hloov ntawm cov txheej txheem sib cais thiab cov txheej txheem rov tsim dua tshiab.Nyob rau lub sijhawm no, cia peb hu lawv ntauwd A thiab ntauwd B.

Rau qhov pib, huab cua huv thiab qhuav compressed nkag mus rau ntauwd A thiab txij li cov pa oxygen molecules me dua nitrogen molecules, lawv yuav nkag mus rau hauv qhov pores ntawm carbon sieve.Nitrogen molecules ntawm qhov tod tes tsis tuaj yeem haum rau hauv qhov pores yog li lawv yuav hla cov pa roj carbon molecular sieve.Yog li ntawd, koj xaus nrog nitrogen ntawm qhov xav tau purity.Cov theem no yog hu ua adsorption lossis cais theem.

Txawm li cas los xij nws tsis nres.Feem ntau ntawm cov nitrogen uas tsim nyob rau hauv ntauwd A tawm hauv lub cev (npaj rau kev siv ncaj qha los yog cia), thaum ib feem me me ntawm cov nitrogen generated yog ya mus rau hauv ntauwd B nyob rau hauv qhov kev taw qhia (los ntawm sab saum toj mus rau hauv qab).Qhov kev khiav dej num no yuav tsum tau thawb tawm cov pa oxygen uas tau ntes nyob rau yav dhau los adsorption theem ntawm ntauwd B. Los ntawm kev tso lub siab hauv ntauwd B, cov pa roj carbon molecular sieves poob lawv lub peev xwm los tuav cov pa oxygen molecules.Lawv yuav tshem tawm ntawm lub sieves thiab nqa tawm los ntawm cov pa tawm los ntawm cov pa nitrogen me me los ntawm ntauwd A. Los ntawm kev ua qhov system ua kom muaj chaw rau cov pa oxygen tshiab los txuas rau lub sieves hauv theem tom ntej adsorption.Peb hu cov txheej txheem no ntawm 'tu' ib qho oxygen saturated ntauwd regeneration.

Ua ntej, tank A yog nyob rau theem adsorption thaum lub tank B regenerates.Hauv theem ob ob lub nkoj sib npaug sib npaug los npaj rau kev hloov.Tom qab hloov, tank A pib rov tsim dua thaum lub tank B tsim nitrogen.

Lub sijhawm no, lub siab nyob rau hauv ob lub yees yuav sib npaug thiab lawv yuav hloov cov theem ntawm adsorbing mus rau regenerating thiab vice versa.CMS nyob rau hauv ntauwd A yuav tau saturated, thaum lub pej thuam B, vim lub depressurization, yuav rov pib dua cov txheej txheem adsorption.Cov txheej txheem no kuj tseem hu ua 's viav vias ntawm siab', uas txhais tau hais tias nws tso cai rau qee cov pa roj raug ntes ntawm qhov siab dua thiab tso tawm ntawm qhov qis dua.Ob lub pej thuam PSA tso cai rau kev tsim cov nitrogen tas li ntawm qhov xav tau purity qib.