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Cov kua nitrogen, nrog rau cov tshuaj formula N₂, yog cov tsis muaj xim, tsis muaj ntxhiab, thiab tsis muaj kuab lom uas tau los ntawm liquefying nitrogen los ntawm cov txheej txheem txias txias. Nws yog dav siv nyob rau hauv kev tshawb fawb, tshuaj, kev lag luam, thiab zaub mov khov vim nws tsis tshua muaj kub thiab ntau yam kev siv. Yog li, ua li cas kua nitrogen tsim? Kab lus no yuav muab cov lus teb ntxaws ntxaws rau cov lus nug no los ntawm ntau yam: kev rho tawm nitrogen, sib sib zog nqus cua txias txoj kev sib cais, txheej txheem ntawm cov kua nitrogen ntau lawm, thiab nws cov kev siv tau zoo.

Nitrogen rho tawm

Kev tsim cov kua nitrogen yuav tsum yog thawj kauj ruam ntawm kev tau txais cov nitrogen ntshiab. Nitrogen yog qhov tseem ceeb ntawm lub ntiaj teb huab cua, suav txog 78% ntawm huab cua ntim. Extracting nitrogen feem ntau yog ua los ntawm kev sib sib zog nqus cua txias cua sib cais tshuab los yog siab viav vias adsorption (PSA) txoj kev. Kev sib sib zog nqus cua txias sib cais yog feem ntau siv txoj kev lag luam. Los ntawm compressing thiab cua txias, nws cais cov pa oxygen, nitrogen, thiab lwm yam roj av ntawm qhov sib txawv. Lub siab viav vias adsorption txoj kev siv cov khoom sib txawv adsorption ntawm adsorbents rau cov roj sib txawv, ua tiav cov pa nitrogen siab los ntawm lub voj voog ntawm adsorption thiab desorption. Cov txheej txheem no ua kom lub purity thiab zoo ntawm nitrogen raws li raw khoom rau cov kua nitrogen ntau lawm txheej txheem.

Txoj kev sib sib zog nqus cua txias sib cais

Txoj kev sib sib zog nqus cua txias sib cais yog ib qho ntawm cov kauj ruam tseem ceeb hauv kev tsim cov kua nitrogen. Txoj kev no siv cov ntsiab lus sib txawv ntawm cov roj cua hauv huab cua kom liquefy thiab maj mam evaporate nitrogen, oxygen, thiab lwm yam roj. Qhov kub ntawm nitrogen yog -195.8 ℃, thaum cov pa oxygen yog -183 ℃. Los ntawm maj mam txo qhov kub thiab txias, oxygen yog liquefied ua ntej thiab sib cais los ntawm lwm yam gases, tawm hauv seem uas yog siab dua-purity nitrogen. Tom qab ntawd, cov nitrogen no tau txias dua hauv qab nws cov ntsiab lus kub kom ua rau cov kua nitrogen, uas yog lub hauv paus ntsiab lus ntawm cov kua nitrogen tsim.

Cov txheej txheem ntawm cov kua nitrogen ntau lawm

Cov txheej txheem ntawm kev tsim kua nitrogen muaj ob peb kauj ruam tseem ceeb: Ua ntej, huab cua yog compressed thiab purified kom tshem tawm impurities xws li dej thiab carbon dioxide; Tom qab ntawd, huab cua yog pre-txias, feem ntau yog nyob ib ncig ntawm -100 ℃ los txhim kho kev sib cais efficiency; Tom ntej no, sib sib zog nqus txias txias yog nqa tawm, maj mam txias cov pa mus rau liquefaction kub ntawm nitrogen kom tau cov kua nitrogen roj. Hauv cov txheej txheem no, cov khoom siv hluav taws xob sib txawv thiab cov fractionation yees ua lub luag haujlwm tseem ceeb hauv kev ua kom muaj kev sib cais zoo ntawm cov khoom sib txawv ntawm qhov kub thiab txias. Thaum kawg, cov kua roj nitrogen yog khaws cia rau hauv cov thawv tshwj xeeb tsim los tswj nws qhov kub thiab txias thiab tiv thaiv vaporization poob.

Kev sib tw hauv kev tsim kua nitrogen

Kev tsim cov kua nitrogen yuav tsum tau kov yeej ntau yam kev sib tw. Thawj yog kev saib xyuas ntawm qhov chaw qis qis, vim tias qhov kub ntawm cov kua nitrogen yog qhov tsawg heev. Thaum lub sij hawm liquefaction txheej txheem, nws yog ib qho tsim nyog yuav tsum tswj qhov kub hauv qab -195.8 ℃, uas yuav tsum tau muaj cov khoom siv tub yees thiab cov khoom siv rwb thaiv tsev. Qhov thib ob, thaum lub caij txias txias, cov pa ntau dhau ntawm cov pa oxygen yuav tsum raug zam vim tias cov pa oxygen muaj zog oxidizing thiab ua rau muaj kev phom sij txaus ntshai. Yog li ntawd, thaum lub sij hawm tsim cov txheej txheem, cov txheej txheem ntawm nitrogen-oxygen sib cais yuav tsum tau tswj kom meej, thiab cov ntaub ntawv tsim nyog yuav tsum tau siv los xyuas kom meej qhov kev ruaj ntseg thiab ruaj ntseg ntawm lub system. Tsis tas li ntawd, kev thauj mus los thiab khaws cia cov kua nitrogen yuav tsum tau tsim tshwj xeeb rau Dewar flasks los tiv thaiv qhov kub thiab txias thiab kua nitrogen vaporization poob.

Kev siv tiag tiag ntawm cov kua nitrogen

Qhov ntsuas kub qis ntawm cov kua nitrogen ua rau nws siv dav hauv ntau qhov chaw. Hauv cov tshuaj, kua nitrogen yog siv rau hauv cryosurgery thiab khaws cov ntaub so ntswg, xws li khov ntawm daim tawv nqaij thiab khaws cov qauv tshuaj lom neeg. Hauv kev lag luam khoom noj khoom haus, kua nitrogen yog siv los ua kom khov sai sai ntawm cov zaub mov, vim nws qhov kub thiab txias ib puag ncig tuaj yeem khov sai sai, txo qhov kev puas tsuaj rau cov qauv ntawm tes thiab yog li tswj cov khoom qub thiab cov khoom noj khoom haus. Nyob rau hauv kev tshawb fawb teb, kua nitrogen yog dav siv nyob rau hauv superconductivity kev tshawb fawb, low-temperature physics thwmsim, thiab lwm yam., muab ib tug tsis tshua muaj-kub sim ib puag ncig. Tsis tas li ntawd, hauv kev tsim khoom lag luam, kua nitrogen yog siv rau hauv kev ua hlau, kev kho cua sov, thiab ua cov roj inert los tiv thaiv qee yam tshuaj lom neeg tshwm sim. Xaus

Cov txheej txheem tsim cov kua nitrogen yog cov txheej txheem ntawm lub cev, feem ntau ua tiav los ntawm kev sib sib zog nqus cua txias sib cais thiab liquefaction technologies. Cov cuab yeej kub qis ntawm cov kua nitrogen ua rau nws ua lub luag haujlwm tseem ceeb hauv ntau yam xws li kev lag luam, tshuaj, thiab kev tshawb fawb. Los ntawm kev rho tawm cov roj nitrogen mus rau qhov sib sib zog nqus txias liquefaction thiab thaum kawg mus rau nws daim ntawv thov, txhua kauj ruam qhia txog lub zog ntawm cov tub yees thiab kev sib cais thev naus laus zis. Hauv kev ua haujlwm zoo, cov kws tshaj lij kuj yuav tsum tau ua kom zoo dua cov txheej txheem ntau lawm kom txo tau lub zog siv thiab txhim kho kev ua haujlwm ntawm cov kua nitrogen ntau lawm.

Peb yog cov chaw tsim khoom thiab exporter ntawm cua cais chav tsev. Yog tias koj xav paub ntau ntxiv txog peb:

Hu rau tus neeg: Anna

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Email :anna.chou@hznuzhuo.com