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| Khoom | Nitrogen |
| Cov mis molecular: | N2 |
| Qhov hnyav ntawm cov molecule: | 28.01 |
| Cov khoom xyaw Harmatic: | Nitrogen |
| Kev phom sij rau kev noj qab haus huv: | Cov pa nitrogen hauv huab cua siab dhau, uas ua rau lub zog ntawm cov pa nqus pa tsawg dua, ua rau hypoxia thiab suffocation. Thaum cov concentration ntawm nitrogen inhalation tsis siab dhau, tus neeg mob thaum xub thawj xav tias lub hauv siab nruj, ua tsis taus pa, thiab tsis muaj zog; tom qab ntawd muaj kev chim siab, kev zoo siab heev, khiav, qw, tsis zoo siab, thiab kev taug kev tsis ruaj khov. Lossis coma. Ua pa ntau dhau, cov neeg mob tuaj yeem coma sai sai thiab tuag vim ua pa thiab lub plawv dhia. Thaum tus neeg dhia dej hloov pauv tob, cov nyhuv anesthesia ntawm nitrogen tuaj yeem tshwm sim; yog tias nws raug hloov los ntawm qhov chaw siab mus rau qhov chaw siab ib txwm muaj, lub npuas nitrogen yuav tsim hauv lub cev, nias cov hlab ntsha, cov hlab ntsha, lossis ua rau cov hlab ntsha thaiv, thiab "decompression kab mob" tshwm sim. |
| Kev phom sij ntawm kev kub hnyiab: | Nitrogen tsis yooj yim hlawv. |
| Ua pa: | Sai sai tawm ntawm qhov chaw mus rau qhov chaw uas muaj huab cua ntshiab. Qhib txoj kev ua pa. Yog tias ua pa nyuaj, muab oxygen. Thaum lub plawv dhia tsis ua pa lawm, tam sim ntawd ua pa cuav thiab phais lub plawv hauv siab kom nrhiav kev kho mob. |
| Cov yam ntxwv txaus ntshai: | Yog tias nws kub taub hau heev, lub siab sab hauv ntawm lub thawv yuav nce ntxiv, thiab nws muaj kev phom sij ntawm kev tawg thiab tawg. |
| Cov khoom ua rau kub hnyiab: | Cov Pa Nitrogen |
| Txoj kev tua hluav taws: | Cov khoom no tsis kub hnyiab. Tshem lub thawv ntawm qhov hluav taws mus rau qhov chaw qhib ntau li ntau tau, thiab cov dej txau rau lub thawv hluav taws txias kom txog thaum kawg ntawm qhov hluav taws kub tas. |
| Kev kho mob thaum muaj xwm txheej ceev: | Tshem tawm cov neeg ua haujlwm hauv thaj chaw muaj kuab paug sai sai mus rau sab saud cua, thiab cais tawm, txwv tsis pub nkag thiab tawm. Nws raug pom zoo kom cov neeg kho mob thaum muaj xwm txheej ceev hnav cov tshuab ua pa zoo thiab cov khaub ncaws ua haujlwm dav dav. Sim qhov chaw xau ntau li ntau tau. Ua pa tau zoo thiab ua kom kis tau sai. Lub thawv xau yuav tsum tau tuav kom zoo, thiab tom qab ntawd siv tom qab kho thiab tshuaj xyuas. |
| Kev ceev faj ua haujlwm: | Kev Ua Haujlwm Txhawj Xeeb. Kev ua haujlwm txhawj xeeb muab cov huab cua zoo. Tus neeg teb xov tooj yuav tsum ua raws li cov txheej txheem ua haujlwm tom qab kev cob qhia tshwj xeeb. Tiv thaiv cov pa roj kom tsis txhob xau rau hauv huab cua hauv chaw ua haujlwm. Haus thiab maj mam tso tawm thaum lub sijhawm tuav kom tiv thaiv kev puas tsuaj rau cov thooj voos kheej kheej thiab cov khoom siv. Nruab nrog cov khoom siv kho mob thaum muaj xwm txheej ceev. |
| Kev ceev faj txog kev khaws cia: | Khaws cia rau hauv qhov chaw txias thiab muaj cua nkag. Nyob deb ntawm hluav taws thiab cua sov. Kuken yuav tsum tsis txhob kub tshaj 30 ° C. Yuav tsum muaj cov khoom siv kho mob thaum muaj xwm txheej ceev hauv thaj chaw khaws cia. |
| TLVTN： | ACGIH Cov pa roj ua rau tuag taus |
| kev tswj hwm kev tsim kho: | Kev ua haujlwm txhawj xeeb. Muab cov huab cua zoo. |
| Kev tiv thaiv kev ua pa: | Feem ntau tsis tas yuav muaj kev tiv thaiv tshwj xeeb. Thaum cov pa oxygen hauv huab cua hauv qhov chaw ua haujlwm tsawg dua 18%, peb yuav tsum hnav cov pa ua pa, cov pa oxygen lossis cov ntaub npog qhov ncauj ntev. |
| Kev tiv thaiv qhov muag: | Feem ntau tsis tas yuav muaj kev tiv thaiv tshwj xeeb. |
| Kev tiv thaiv lub cev: | Hnav khaub ncaws ua haujlwm dav dav. |
| Kev tiv thaiv tes: | Hnav cov hnab looj tes tiv thaiv kev ua haujlwm dav dav. |
| Kev tiv thaiv lwm yam: | Tsis txhob ua pa rau hauv cov pa uas muaj ntau heev. Yuav tsum tau saib xyuas kom nkag mus rau hauv cov thoob dej, qhov chaw tsawg lossis lwm qhov chaw uas muaj ntau heev. |
| Cov khoom xyaw tseem ceeb: | Cov ntsiab lus: nitrogen ntshiab siab ≥99.999%; qib kev lag luam thawj theem ≥99.5%; theem thib ob ≥98.5%. |
| Qhov tsos | Cov roj tsis muaj xim thiab tsis muaj ntxhiab. |
| Melving point (℃): | -209.8 |
| Kub taw tes (℃): | -195.6 |
| Qhov ceev sib piv (dej = 1): | 0.81 (-196 ℃) |
| Qhov ceev ntawm cov pa dej (cua = 1): | 0.97 |
| Lub zog ntawm cov pa roj uas tau nqus (KPA): | 1026.42 (-173 ℃) |
| Kev kub hnyiab (kj/mol): | tsis muaj qab hau |
| Kub tseem ceeb (℃): | -147 |
| Qhov siab tseem ceeb (MPA): | 3.40 |
| Qhov taw tes kub (℃): | tsis muaj qab hau |
| Kub hnyiab (℃): | tsis muaj qab hau |
| Qhov txwv siab tshaj plaws ntawm kev tawg: | tsis muaj qab hau |
| Qhov txwv qis tshaj plaws ntawm kev tawg: | tsis muaj qab hau |
| Kev yaj tau: | Me ntsis soluble hauv dej thiab ethanol. |
| Lub hom phiaj tseem ceeb: | Siv los ua cov ammonia, nitric acid, siv ua tus neeg sawv cev tiv thaiv khoom, tus neeg sawv cev khov. |
| Kev lom hnyav heev: | Ld50: Tsis muaj ntaub ntawv LC50: Tsis muaj ntaub ntawv |
| Lwm yam teeb meem uas ua rau muaj kev phom sij: | Tsis muaj ntaub ntawv |
| Txoj kev pov tseg pov tseg: | Thov saib cov cai hauv tebchaws thiab hauv zos ua ntej pov tseg. Cov pa roj tawm hauv qhov pa tawm raug tso tawm ncaj qha mus rau hauv huab cua. |
| Tus lej khoom thauj khoom txaus ntshai: | 22005 |
| Tus lej UN: | 1066 |
| Pawg ntim khoom: | O53 |
| Txoj kev ntim khoom: | Lub tog raj kheej roj hlau; cov thawv ntoo ib txwm sab nraum lub raj mis ampoule. |
| Cov kev ceev faj rau kev thauj mus los: | |
Yuav ua li cas kom tau txais cov pa roj nitrogen purity siab los ntawm Huab Cua?
1. Txoj Kev Sib Cais Cua Cryogenic
Txoj kev sib cais Cryogenic tau dhau los ntawm ntau tshaj 100 xyoo ntawm kev txhim kho, thiab tau ntsib ntau yam txheej txheem sib txawv xws li hluav taws xob siab, hluav taws xob siab thiab qis, siab nruab nrab, thiab tag nrho cov txheej txheem qis. Nrog rau kev txhim kho ntawm cov thev naus laus zis niaj hnub thiab cov khoom siv, cov txheej txheem ntawm hluav taws xob siab, siab thiab qis siab, thiab nruab nrab-voltage nqus tsev tau raug tshem tawm. Cov txheej txheem qis qis qis nrog kev siv hluav taws xob tsawg dua thiab kev tsim khoom muaj kev nyab xeeb dua tau dhau los ua thawj qhov kev xaiv rau cov khoom siv nqus tsev loj thiab nruab nrab kub qis. Cov txheej txheem faib cua qis qis tag nrho yog muab faib ua cov txheej txheem compression sab nraud thiab cov txheej txheem compression sab hauv raws li cov kev sib txuas compression sib txawv ntawm cov khoom siv oxygen thiab nitrogen. Cov txheej txheem compression sab nraud qis qis tag nrho tsim cov pa oxygen lossis nitrogen qis qis, thiab tom qab ntawd compresses cov roj khoom mus rau qhov siab xav tau los muab rau tus neeg siv los ntawm lub compressor sab nraud. Siab tag nrho hauv cov txheej txheem compression qis Cov kua oxygen lossis kua nitrogen tsim los ntawm distillation distillation tau txais los ntawm cov twj tso kua hauv lub thawv txias kom vaporize tom qab lub siab xav tau los ntawm tus neeg siv, thiab tus neeg siv tau muab tom qab rov ua kom sov hauv lub cuab yeej pauv cua sov tseem ceeb. Cov txheej txheem tseem ceeb yog lim, nias, txias, ntxuav, supercharger, nthuav dav, distillation, sib cais, cua sov - rov sib sau ua ke, thiab muab cov cua nyoos los ntawm sab nraud.
2. txoj kev nqus dej siab (txoj kev PSA)
Txoj kev no yog raws li cua compressed ua cov khoom siv raw. Feem ntau, kev tshuaj ntsuam molecular yog siv ua adsorbent. Nyob rau hauv qee qhov siab, qhov sib txawv ntawm kev nqus ntawm cov pa oxygen thiab nitrogen hauv huab cua hauv cov molecular sieves sib txawv yog siv. Hauv kev sau cov roj, kev sib cais ntawm oxygen thiab nitrogen yog siv; thiab tus neeg sawv cev nqus molecular sieve raug soj ntsuam thiab rov ua dua tom qab tshem tawm lub siab.
Ntxiv rau cov molecular sieves, cov adsorbents kuj tseem tuaj yeem siv alumina thiab silicone.
Tam sim no, cov khoom siv ua nitrogen uas siv ntau yog raws li cua compressed, carbon molecular sieve ua adsorbent, thiab siv qhov sib txawv ntawm lub peev xwm adsorption, tus nqi adsorption, lub zog adsorption ntawm oxygen thiab nitrogen ntawm carbon molecular sieves thiab kev ntxhov siab sib txawv muaj cov yam ntxwv adsorption sib txawv kom ua tiav kev sib cais oxygen thiab nitrogen. Ua ntej tshaj plaws, oxygen hauv huab cua yog qhov tseem ceeb los ntawm cov pa roj carbon, uas ua rau nitrogen nplua nuj hauv cov roj theem. Yuav kom tau txais nitrogen tas li, ob lub pej thuam adsorption yog qhov yuav tsum tau ua.
Daim Ntawv Thov
1. Cov khoom siv tshuaj lom neeg ntawm nitrogen ruaj khov heev thiab feem ntau tsis teb rau lwm yam tshuaj. Qhov zoo inertial no tso cai rau nws siv dav hauv ntau qhov chaw anaerobic, xws li siv nitrogen los hloov huab cua hauv ib lub thawv tshwj xeeb, uas ua lub luag haujlwm hauv kev sib cais, hluav taws kub retardant, tawg-pov thawj, thiab anticorrosion. LPG engineering, roj pipelines thiab liquefied bronchial networks yog siv rau kev siv ntawm kev lag luam thiab kev siv pej xeem [11]. Nitrogen kuj tseem siv tau rau hauv kev ntim khoom noj thiab tshuaj raws li npog cov roj, kaw cov cables, xov tooj kab, thiab cov log tsheb roj hmab uas tuaj yeem nthuav dav. Raws li ib hom tshuaj preservative, nitrogen feem ntau hloov nrog hauv av kom qeeb qhov corrosion tsim los ntawm kev sib cuag ntawm lub raj kem thiab cov kua stratum.
2. Cov pa roj nitrogen uas muaj purity siab siv rau hauv cov txheej txheem casting hlau yaj los txhim kho cov hlau yaj kom zoo dua qub. Cov pa roj, nws tiv thaiv tau qhov kub siab oxidation ntawm tooj liab, khaws cov khoom siv tooj liab, thiab tshem tawm cov txheej txheem pickling. Cov pa roj nitrogen uas muaj cov pa roj carbon dioxide (nws cov khoom sib xyaw yog: 64.1% N2, 34.7% CO, 1.2% H2 thiab me ntsis CO2) ua cov pa roj tiv thaiv thaum lub sijhawm tooj liab yaj, yog li ntawd cov nplaim tooj liab yaj tau siv cov khoom zoo.
3. Kwv yees li 10% ntawm cov nitrogen tsim tawm los ua cov khoom txias, feem ntau suav nrog: feem ntau yog cov roj hmab mos lossis zoo li cov roj hmab khov, cov roj hmab ua haujlwm kub qis, kev cog lus txias thiab kev teeb tsa, thiab cov qauv tshuaj lom neeg, xws li kev khaws cov ntshav txias hauv kev thauj mus los.
4. Nitrogen siv tau los ua nitric oxide lossis nitrogen dioxide los tsim nitric acid. Txoj kev tsim khoom no kim thiab tus nqi qis. Tsis tas li ntawd, nitrogen kuj siv tau los ua ammonia thiab hlau nitride.
Lub sijhawm tshaj tawm: Lub Kaum Hli-09-2023
