| Khoom | Nitrogen |
| Molecular formula: | N2 |
| Molecular Luj: | 28.01 Nws |
| Harmatic cov khoom xyaw: | Nitrogen |
| Kev phom sij rau kev noj qab haus huv: | Cov ntsiab lus nitrogen hauv huab cua yog siab dhau, uas txo qhov voltage siab ntawm qhov nqus cua, ua rau hypoxia thiab ua tsis taus pa. Thaum cov concentration ntawm nitrogen inhalation tsis siab dhau, tus neeg mob pib hnov 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 tsis ruaj tsis khov. Los yog coma. Kev nqus tau siab, cov neeg mob tuaj yeem tsis nco qab sai thiab tuag vim ua pa thiab lub plawv dhia. Thaum tus neeg dhia dej hloov siab heev, cov nyhuv tshuaj loog ntawm nitrogen tuaj yeem tshwm sim; Yog hais tias nws raug xa mus los ntawm ib puag ncig kev kub siab mus rau ib puag ncig siab, lub npuas nitrogen yuav tsim nyob rau hauv lub cev, compress cov hlab ntsha, cov hlab ntsha, los yog ua rau cov hlab ntsha tsis zoo, thiab "decompression disease" tshwm sim. |
| Hlawv phom sij: | Nitrogen yog non-flammable. |
| Ua pa: | Ceev nrooj tawm ntawm qhov chaw mus rau huab cua ntshiab. Khaws qhov chaw ua pa kom qhib. Yog ua pa nyuaj, muab cov pa oxygen. Thaum lub plawv dhia ua pa nres, tam sim ntawd ua pa tawm dag zog thiab lub plawv dhia hauv siab mus nrhiav kev kho mob. |
| Cov yam ntxwv txaus ntshai: | Yog tias nws ntsib kub taub hau, lub siab sab hauv ntawm lub thawv nce, thiab nws yog qhov txaus ntshai ntawm kev tawg thiab tawg. |
| Kev puas tsuaj combustion khoom: | Nitrogen Gas |
| Txoj kev tua hluav taws: | Cov khoom no tsis hlawv. Moles lub thawv los ntawm qhov hluav taws kub mus rau qhov chaw qhib kom ntau li ntau tau, thiab cov dej txau lub thawv hluav taws kub kom txias kom txog thaum qhov hluav taws kub kawg. |
| Kev kho mob xwm txheej ceev: | Ceev nrooj khiav tawm cov neeg ua haujlwm nyob rau hauv cov pa paug ntawm thaj chaw muaj kuab paug rau saum cua, thiab cais tawm, nruj me ntsis txwv kev nkag thiab tawm. Nws raug pom zoo tias cov neeg ua haujlwm kho mob xwm txheej ceev yuav tsum hnav lub tshuab ua pa zoo rau tus kheej thiab cov khaub ncaws ua haujlwm. Sim cov dej xau kom ntau li ntau tau. Tsim nyog qhov cua thiab ceev kis. Lub thawv xau yuav tsum tau ua kom zoo, thiab siv tom qab kho thiab tshuaj xyuas. |
| Kev ceev faj ua haujlwm: | Kev txhawj xeeb. Kev txhawj xeeb txog kev ua haujlwm muab qhov cua zoo. Tus neeg teb xov tooj yuav tsum nruj me ntsis raws li cov txheej txheem ua haujlwm tom qab kev cob qhia tshwj xeeb. Tiv thaiv kom tsis txhob muaj pa paug rau huab cua hauv chaw ua haujlwm. Haus dej thiab maj mam tshem tawm thaum tuav kom tsis txhob muaj kev puas tsuaj rau lub tog raj kheej thiab cov khoom siv. Nruab nrog cov khoom siv kho mob thaum muaj xwm ceev. |
| Kev ceev faj cia: | Khaws rau hauv qhov chaw txias, ventilated warehouse. Nyob deb ntawm hluav taws thiab cua sov. Kuken yuav tsum tsis txhob siab tshaj 30 ° C. Yuav tsum muaj cov khoom siv kho mob xwm txheej ceev hauv qhov chaw cia. |
| TLVTN: | ACGIH Suffocation gas |
| engineering tswj: | Kev txhawj xeeb. Muab tej yam ntuj tso cua zoo. |
| Kev tiv thaiv ua pa: | Feem ntau tsis tas yuav muaj kev tiv thaiv tshwj xeeb. Thaum cov pa oxygen concentration hauv huab cua hauv qhov chaw ua haujlwm tsawg dua 18%, peb yuav tsum hnav lub tshuab ua pa, pa oxygen lossis lub qhov ncauj qhov ntswg 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. |
| Kev tiv thaiv tes: | Hnav cov hnab looj tes tiv thaiv kev ua haujlwm. |
| Lwm yam kev tiv thaiv: | Tsis txhob hnov qab txog kev nqus pa siab. Kev nkag mus rau hauv lub tank, qhov chaw txwv lossis lwm qhov chaw siab yuav tsum tau saib xyuas. |
| Cov khoom xyaw tseem ceeb: | Cov ntsiab lus: siab - ntshiab nitrogen ≥99.999%; kev lag luam qib thawj qib ≥99.5%; theem nrab ≥98.5%. |
| Qhov tshwm sim | Tsis muaj xim thiab tsw ntxhiab. |
| Melting point (℃): | - 209.8 |
| Boiling point (℃): | -195.6 |
| Relative ntom ntom (dej = 1): | 0.81 (-196 ℃) |
| Relatively steam density (air = 1): | 0.97 ib |
| Saturated steam siab (KPA): | 1026.42 (-173 ℃) |
| Kev kub hnyiab (kj / mol): | tsis muaj ntsiab lus |
| Qhov kub thiab txias (℃): | -147 |
| Critical siab (MPA): | 3.40 Nws |
| Flash point (℃): | tsis muaj ntsiab lus |
| Kub kub (℃): | tsis muaj ntsiab lus |
| Sab saum toj txwv ntawm tawg: | tsis muaj ntsiab lus |
| Kev txwv qis ntawm kev tawg: | tsis muaj ntsiab lus |
| Solubility: | Me ntsis soluble hauv dej thiab ethanol. |
| Lub hom phiaj tseem ceeb: | Siv los ua ke ammonia, nitric acid, siv los ua cov khoom siv tiv thaiv, tus neeg ua haujlwm khov. |
| Mob toxicity: | Ld50: Tsis muaj ntaub ntawv LC50: Tsis muaj ntaub ntawv |
| Lwm yam teebmeem: | Tsis muaj ntaub ntawv |
| Abolition pov tseg txoj kev: | Thov xa mus rau cov kev cai hauv lub tebchaws thiab hauv cheeb tsam ua ntej muab pov tseg. Cov pa pa tawm ncaj qha mus rau hauv qhov chaw. |
| Dangerous cargo tooj: | 22005 |
| UN Number: | 1066 ib |
| Ntim qeb: | o53 ua |
| Packing method: | Hlau lub tog raj kheej; zoo tib yam ntoo thawv sab nraum lub ampoule lub raj mis. |
| Kev ceev faj rau kev thauj mus los: | |
Yuav ua li cas kom tau siab purity nitrogen gas los ntawm Cua?
1. Cryogenic Air Separation Method
Txoj kev sib cais Cryogenic tau dhau los ntawm ntau tshaj 100 xyoo ntawm txoj kev loj hlob, thiab tau ntsib ntau yam txheej txheem sib txawv xws li high voltage, siab thiab qis voltage, nruab nrab siab, thiab tag nrho cov txheej txheem tsis tshua muaj hluav taws xob. Nrog rau txoj kev loj hlob ntawm niaj hnub cua qhab nia technology thiab cov cuab yeej siv, cov txheej txheem ntawm high-voltage, siab thiab tsis tshua muaj siab, thiab nruab nrab-voltage nqus tsev vacuum tau pib tshem tawm. Cov txheej txheem qis qis qis nrog kev siv hluav taws xob qis thiab kev ruaj ntseg ntau lawm tau dhau los ua thawj qhov kev xaiv rau cov khoom siv loj thiab nruab nrab-qhov kub thiab txias. Cov txheej txheem tag nrho qis-voltage cua faib cov txheej txheem tau muab faib ua cov txheej txheem compression sab nraud thiab cov txheej txheem sab hauv compression raws li qhov sib txawv compression txuas ntawm cov khoom siv oxygen thiab nitrogen. Tag nrho cov txheej txheem qis-siab sab nraud compression ua rau qis-siab oxygen lossis nitrogen, thiab tom qab ntawd compresses cov khoom siv roj rau lub siab xav tau los muab cov neeg siv los ntawm cov khoom siv sab nraud. Tag nrho cov siab nyob rau hauv cov txheej txheem uas tsis tshua muaj siab compression Cov kua oxygen los yog kua nitrogen generated los ntawm distilled distillation yog txais los ntawm cov kua twj tso kua mis nyob rau hauv lub thawv txias kom vaporize tom qab lub siab xav tau los ntawm tus neeg siv, thiab tus neeg siv yuav tsum tau muab tom qab re-heat nyob rau hauv lub ntsiab tshav kub exchanger ntaus ntawv. Cov txheej txheem tseem ceeb yog filtering, compression, txias, purification, supercharger, expansion, distillation, sib cais, tshav kub-reunion, thiab lwm yam khoom ntawm raw cov ntaub ntawv.
2. Siab viav vias adsorption method (PSA method)
Txoj kev no yog raws li compressed cua raws li cov khoom siv raw. Feem ntau, kev tshuaj ntsuam molecular yog siv los ua tus adsorbent. Nyob rau hauv qee lub siab, qhov sib txawv ntawm qhov nqus ntawm oxygen thiab nitrogen molecules nyob rau hauv cov huab cua nyob rau hauv txawv molecular sieves yog siv. Hauv kev sau cov pa roj, kev sib cais ntawm oxygen thiab nitrogen yog siv; thiab cov molecular sieve absorbing tus neeg saib xyuas thiab rov ua dua tom qab lub siab tshem tawm.
Ntxiv nrog rau molecular sieves, adsorbents tseem tuaj yeem siv alumina thiab silicone.
Tam sim no, feem ntau siv transformer adsorption nitrogen ua cov cuab yeej ua raws li cov cua compressed, carbon molecular sieve raws li cov adsorbent, thiab siv qhov sib txawv ntawm lub peev xwm adsorption, adsorption tus nqi, adsorption quab yuam ntawm oxygen thiab nitrogen ntawm carbon molecular sieves thiab txawv kev ntxhov siab muaj peev xwm sib txawv adsorption yam ntxwv kom ua tiav oxygen thiab nitrogen sib cais. Ua ntej tshaj plaws, cov pa oxygen hauv huab cua yog qhov tseem ceeb los ntawm cov pa roj carbon molecules, uas enriches nitrogen nyob rau theem roj. Txhawm rau kom tau txais nitrogen tsis tu ncua, yuav tsum muaj ob lub adsorption ntauwd.
Daim ntawv thov
1. Cov yam ntxwv ntawm nitrogen yog ruaj khov heev thiab feem ntau tsis teb rau lwm yam khoom. Qhov kev tsis zoo no tso cai rau nws siv dav hauv ntau qhov chaw anaerobic, xws li siv nitrogen los hloov cov huab cua hauv ib lub thawv tshwj xeeb, uas ua lub luag haujlwm hauv kev sib cais, nplaim hluav taws, tawg-pov thawj, thiab tiv thaiv corrosion. LPG engineering, gas pipelines thiab liquefied bronchial tes hauj lwm yog siv rau daim ntawv thov kev lag luam thiab pej xeem siv [11]. Nitrogen kuj tuaj yeem siv rau hauv ntim cov khoom noj thiab tshuaj raws li cov pa roj carbon monoxide, sealing cables, xov tooj, thiab cov log tsheb uas muaj zog tuaj yeem nthuav dav. Raws li ib yam ntawm preservative, nitrogen yog feem ntau hloov nrog underground kom qeeb lub corrosion generated los ntawm kev sib cuag ntawm lub raj kem thiab cov stratum kua.
2. High-purity nitrogen yog siv nyob rau hauv cov hlau melting casting txheej txheem los refine cov hlau yaj los txhim kho qhov zoo ntawm casting dawb paug. Gas, nws zoo tiv thaiv qhov kub siab oxidation ntawm tooj liab, ua rau saum npoo ntawm cov khoom siv tooj liab, thiab tshem tawm cov txheej txheem pickling. Nitrogen-based charcoal furnace gas (nws muaj pes tsawg leeg yog: 64.1% N2, 34.7% CO, 1.2% H2 thiab ib qho me me ntawm CO2) ua cov roj tiv thaiv thaum tooj liab melting, kom cov tooj liab yaj saum npoo yog siv cov khoom zoo.
3. Kwv yees li 10% ntawm cov nitrogen uas ua rau cov tub yees, feem ntau suav nrog: feem ntau yog mos lossis zoo li roj hmab-zoo li solidification, qis-temperature processing rubber, txias contraction thiab installation, thiab cov khoom siv lom neeg, xws li kev khaws cov ntshav txias hauv kev thauj mus los.
4. Nitrogen tuaj yeem siv los tsim cov nitric oxide lossis nitrogen dioxide los tsim nitric acid. Txoj kev tsim khoom no yog siab thiab tus nqi qis. Tsis tas li ntawd, nitrogen kuj tuaj yeem siv rau hluavtaws ammonia thiab hlau nitride.
Post lub sij hawm: Oct-09-2023