Lubkev tsim cov formaldehyde, ib qho txheej txheem tseem ceeb hauv kev lag luam, xav tau kev tswj hwm kom meej txog cov inline concentration ntawm methanol thiab formaldehyde kom ntseeg tau tias cov khoom zoo, kev ua haujlwm zoo, thiab kev ua raws li txoj cai. Formaldehyde, tsim los ntawm kev ua catalytic oxidation ntawm methanol, yog ib qho tseem ceeb hauv cov resins, adhesives, plastics, thiab pharmaceuticals, tab sis txawm tias me ntsis deviations hauvkev sib xyaw ua ke ntawm methanollos yogkev sib xyaw ua ke ntawm formaldehydetuaj yeem ua rau polymerization, txo cov qoob loo, lossis tsis ua raws li cov qauv kev nyab xeeb nruj.
Cov cuab yeej ntsuas methanol,Cov ntsuas formaldehyde concentration,cov tshuaj ntsuam xyuas formaldehyde concentration, thiabcov tshuaj ntsuam xyuas formaldehyde concentrationmuab kev saib xyuas tiag tiag, raug, ua rau cov neeg ua haujlwm hauv cov nroj tsuag tswj tau cov xwm txheej teb zoo tshaj plaws thiab txo qis kev ua haujlwm tsis zoo.
Kev Taw Qhia Dav Dav ntawm Cov Txheej Txheem Tshuaj
Formaldehyde, yog ib yam tshuaj siv tau ntau yam hauv txhua yam los ntawm cov nplaum ntoo mus rau cov tshuaj nruab nrab, yog tsim los ntawm kev ua kom cov tshuaj methanol hauv cov chaw tsim cov formaldehyde sib xyaw. Kev tswj kom muaj cov tshuaj methanol thiab cov tshuaj formaldehyde sib xws yog qhov tseem ceeb kom ua tau raws li cov qauv zoo.
Cov cuab yeej ntsuas methanol concentration thiab formaldehyde concentration analyzers yog cov cuab yeej tseem ceeb rau kev ua tiav qhov kev ntsuas no. Cov khoom siv no muab cov ntaub ntawv tiag tiag, tshem tawm qhov kev ncua sijhawm thiab qhov yuam kev cuam tshuam nrog kev kuaj tes, thiab ua rau cov neeg teb xov tooj tuaj yeem ua kom zoo dua cov xwm txheej teb, txo cov khib nyiab, thiab xyuas kom ua raws li cov cai ib puag ncig thiab kev nyab xeeb.
Cov Chemistry thiab Cov Txheej Txheem ntawm Formaldehyde Synthesis
Kev tsim cov formaldehyde cuam tshuam nrog kev ua kom cov tshuaj methanol sib xyaw ua ke, ib qho txheej txheem uas tau ua kom zoo dua ntau xyoo los ua kom tau raws li qhov xav tau ntawm cov lag luam xws li kev tsim tshuaj lom neeg thiab cov tshuaj. Cov tshuaj exothermic no yog catalyzed los ntawm nyiaj lossis hlau-molybdenum, nrog rau cov pa methanol sib xyaw nrog huab cua thiab dhau los ntawm cov catalyst hauv lub reactor.
Cov formaldehyde uas tshwm sim los ntawm kev sib xyaw ua ke no raug nqus mus rau hauv cov kua dej, feem ntau raug tswj nrog 10–15% methanol kom tiv thaiv kev sib xyaw ua ke rau paraformaldehyde. Cov txheej txheem no yuav tsum tau tswj hwm qhov concentration ntawm methanol hauv cov khoom noj thiab formaldehyde concentration hauv lub reactor thiab cov khoom kawg kom ntseeg tau tias muaj txiaj ntsig zoo.
Cov theem tseem ceeb suav nrog:
Kev Npaj Methanol
Xyuas kom tseeb tias cov khoom noj muaj qhov concentration ntawm methanol hauv dej kom raug (feem ntau yog 50–60 wt%) los ua kom cov tshuaj tiv thaiv ua haujlwm tau zoo.
Kev ua kom tawv nqaij tawv
Tswj qhov sib piv ntawm methanol-cua thiab cov xwm txheej ntawm reactor kom ua kom muaj formaldehyde ntau tshaj plaws thiab txo cov khoom seem xws li formic acid.
Kev nqus dej
Nqus cov formaldehyde rau hauv dej los tsim cov formalin, xav tau kev ntsuas qhov tseeb ntawm formaldehyde kom tiv thaiv kev polymerization.
Kev Khaws Cia thiab Kev Ruaj Ntseg
Ntxiv cov tshuaj methanol stabilizers kom tswj tau qhov concentration ntawm formaldehyde thiab tiv thaiv kev puas tsuaj.
Vim li cas Inline Concentration Control thiaj tseem ceeb heev
Kev tswj xyuas qhov ntsuas methanol concentration thiab formaldehyde concentration kom raug yog qhov tseem ceeb rau ntau yam. Methanol ntau dhau hauv cov khoom noj khoom haus tuaj yeem ua rau oxidation tsis tiav, txo cov formaldehyde tsim tawm thiab ua rau cov khib nyiab ntau ntxiv. Ntawm qhov tod tes, methanol tsis txaus tuaj yeem ua rau cov tshuaj tiv thaiv tsis txaus, txo qis kev tsim khoom. Hauv theem nqus, cov formaldehyde concentration siab (saum toj no 50 wt%) muaj kev pheej hmoo polymerization, tsim cov khoom paraformaldehyde uas txhaws cov khoom siv thiab cuam tshuam kev ua haujlwm.
Cov txheej txheem saib xyuas ib txwm muaj, xws li offline gas chromatography lossis titration, siv sijhawm ntev thiab yooj yim ua yuam kev, ua rau qeeb kev kho. Cov cuab yeej ntsuas methanol concentration thiab cov cuab yeej ntsuas formaldehyde concentration muab cov ntaub ntawv tas mus li, lub sijhawm tiag tiag, ua rau cov neeg teb xov tooj tuaj yeem hloov kho cov khoom noj khoom haus, cov xwm txheej ntawm reactor, thiab cov khoom ntxiv stabilizer tam sim ntawd, ua kom ntseeg tau tias cov khoom zoo thiab kev ua haujlwm zoo.
Cov Lus Qhia Txog Lonnmeter Inline Concentration Monitor
Lub Lonnmeter ultrasonic concentration meter ua haujlwm los ntawm kev ntsuas lub sijhawm xa cov ultrasonic waves los ntawm qhov chaw teeb liab mus rau lub receiver, xam qhov ceev ntawm lub suab los xam qhov ceev thiab concentration. Txoj kev no tsis cuam tshuam los ntawm cov npuas, ua npuas dej, lossis cov kua conductivity, xim, lossis pob tshab, ua kom ntseeg tau tias muaj kev ntseeg siab hauv cov chaw nyuaj xws li cov chaw tsim formaldehyde.
Qhov tsis muaj cov khoom txav mus los ua rau tsis muaj kev puas tsuaj ntawm cov khoom siv, lav qhov ua tau zoo tas mus li. Lub 'meter' tsim uas tsis cuam tshuam rau kev saib xyuas tsawg kawg nkaus, thiab nws cov khoom siv tiv taus xeb tiv taus cov tshuaj lom neeg hnyav, ua rau nws tsim nyog rau cov chaw tsim tshuaj uas siv cov tshuaj formaldehyde thiab methanol.
Cov Tswv Yim Txhim Kho thiab Kev Koom Ua Ke
Yuav kom ua tau zoo tshaj plaws ntawm cov formaldehyde concentration analyzers, kev teeb tsa zoo yog qhov tseem ceeb. Yuav tsum muab cov sensors methanol concentration tso rau hauv cov kab feedstock kom ntseeg tau tias cov khoom nkag zoo sib xws, thaum cov ntsuas formaldehyde concentration yog qhov zoo tagnrho rau cov reactor outlets thiab cov kab nqus dej los saib xyuas cov khoom tsim thiab kev ruaj khov. Cov kab ke redundant tuaj yeem xa mus rau kev ua haujlwm tas mus li thaum lub sijhawm txij nkawm, txo qis lub sijhawm tsis ua haujlwm.
Kev koom ua ke nrog cov tshuab tswj cov nroj tsuag tso cai rau kev hloov kho tsis siv neeg, xws li kev tswj cov nqi pub methanol lossis kev ntxiv cov stabilizer, raws li cov ntaub ntawv tiag tiag. Kev kho kom raug tsis tu ncua nrog cov kev daws teeb meem txheem ua kom muaj kev ntsuas raug, tshwj xeeb tshaj yog nyob rau hauv cov xwm txheej dynamic ntawm formaldehyde synthesis.
Cov txiaj ntsig ntawm Lonnmeter Inline Concentration Meter
Txhim Kho Kev Ua Haujlwm Zoo
Kev siv cov cuab yeej ntsuas methanol concentration thiab cov cuab yeej ntsuas formaldehyde concentration ua rau kev ua haujlwm zoo dua hauv cov chaw tsim khoom formaldehyde. Los ntawm kev muab cov ntaub ntawv tiag tiag, cov khoom siv no ua rau cov neeg teb xov tooj tuaj yeem ntes thiab kho qhov sib txawv ntawm cov concentration tam sim ntawd, txo qhov kev pheej hmoo ntawm kev cuam tshuam cov txheej txheem. Piv txwv li, kev tswj hwm qhov zoo tshaj plaws ntawm cov dej methanol concentration hauv cov khoom noj khoom haus tiv thaiv kev oxidation tsis tiav, ua kom cov txiaj ntsig siab tshaj plaws thiab txo cov khib nyiab. Ib yam li ntawd, kev ntsuas qhov tseeb ntawm formaldehyde concentration hauv theem nqus tiv thaiv kev polymerization, txo cov khoom siv fouling thiab cov nqi txij nkawm.
Hauv cov chaw tsim tshuaj petrochemical, cov cuab yeej no ua kom siv cov tshuaj methanol zoo dua, txo cov nqi khoom siv, thaum nyob hauv cov chaw tsim tshuaj, lawv ua kom muaj qhov zoo nruab nrab, txo qis kev ua haujlwm dua. Kev kwv yees hauv kev lag luam qhia tias kev saib xyuas hauv kab tuaj yeem txo kev siv hluav taws xob txog li 10% thiab txuag lub sijhawm ua haujlwm ntau los ntawm kev ua kom cov txheej txheem tshuaj xyuas tsis siv neeg.
Xyuas kom meej tias cov khoom zoo thiab ua raws li txoj cai
Cov khoom siv ua los ntawm formaldehyde, xws li urea-formaldehyde resins thiab cov tshuaj intermediates, yuav tsum ua tau raws li cov qauv zoo thiab kev nyab xeeb. Cov cuab yeej ntsuas formaldehyde concentration xyuas kom meej tias cov khoom kawg (piv txwv li, formalin) tswj tau qhov concentration kom raug (37–50 wt%) thiab cov ntsiab lus stabilizer, tiv thaiv kev puas tsuaj thiab xyuas kom meej tias muaj kev ua tau zoo hauv kev siv xws li cov nplaum thiab cov txheej txheem.
Cov kev cai ib puag ncig, uas yog vim muaj kev lom ntawm formaldehyde, yuav tsum tau tswj kev tso pa tawm kom nruj. Cov ntsuas inline pab cov nroj tsuag saib xyuas thiab txo cov pa tawm formaldehyde, txo qhov kev pheej hmoo ntawm kev nplua thiab txhim kho kev ruaj khov. Qhov no yog qhov tseem ceeb heev rau cov nroj tsuag petrochemical, qhov twg kev tsim khoom loj ua rau muaj kev cuam tshuam rau ib puag ncig ntau ntxiv.
Kev Txuag Nyiaj thiab Tus Nqi Mus Ntev
Cov txiaj ntsig nyiaj txiag ntawm cov ntsuas formaldehyde concentration yog qhov tseem ceeb heev. Los ntawm kev ua kom tsis siv neeg saib xyuas, cov khoom siv no txo cov nqi zog ua haujlwm cuam tshuam nrog kev kuaj tes, tej zaum yuav txuag tau ntau teev txhua hnub hauv kev ua haujlwm loj. Lawv kuj tseem txo qis cov khib nyiab los ntawm kev tiv thaiv kev siv ntau dhau lossis tsawg dhau ntawm methanol thiab stabilizers, ua kom zoo dua kev siv cov khoom noj khoom haus. Kev txuag hluav taws xob tau ua tiav los ntawm kev tswj hwm cov xwm txheej zoo tshaj plaws, txo qhov xav tau cua sov lossis txias ntau dhau hauv reactors thiab cov chav nqus.
Qhov ruaj khov ntawm cov 'meter' no, ua los ntawm cov khoom siv tiv taus xeb, ua kom ntseeg tau ntev hauv cov xwm txheej hnyav ntawm formaldehyde synthesis. Lawv cov kev xav tau kev saib xyuas tsawg thiab kev koom ua ke nrog cov txheej txheem tswj hwm ua rau lawv yog kev nqis peev uas tsim nyog rau cov chaw tsim tshuaj lom neeg thiab cov chaw tsim khoom petrochemical uas tab tom nrhiav kev txhim kho kev ua lag luam.
Kev xaiv lub ntsuas methanol concentration lossis formaldehyde concentration analyzer uas tsim nyog yuav tsum tau xav txog cov yam xws li qhov tseeb, qhov kub, txoj kev teeb tsa, cov ntaub ntawv, thiab lwm yam.
Cov Lus Nug Feem Ntau
Cov Sensors Concentration Methanol Txhim Kho Formaldehyde Synthesis Li Cas?
Cov cuab yeej ntsuas methanol concentration muab kev saib xyuas lub sijhawm tiag tiag ntawm cov khoom noj khoom haus zoo, ua kom ntseeg tau tias qhov ntsuas methanol concentration zoo tshaj plaws rau kev ua kom catalytic oxidation zoo. Qhov no tiv thaiv cov tshuaj tiv thaiv tsis tiav thiab ua kom muaj txiaj ntsig zoo tshaj plaws hauv cov nroj tsuag tsim formaldehyde, txhim kho cov khoom sib xws.
Cov txiaj ntsig ntawm formaldehyde concentration analyzers yog dab tsi?
Cov cuab yeej ntsuas formaldehyde concentration ua kom ntseeg tau tias qhov ntsuas tau raug ntawm formaldehyde concentration, tiv thaiv kev sib xyaw ua ke thiab ua kom ua raws li cov kev txwv ntawm txoj cai. Lawv txo cov khib nyiab thiab txhim kho kev ua haujlwm zoo hauv cov chaw tsim tshuaj lom neeg thiab cov chaw tsim tshuaj.
Cov Inline Concentration Meters puas tuaj yeem tiv taus cov xwm txheej Formaldehyde Synthesis?
Cov khoom siv saib xyuas formaldehyde niaj hnub no tau tsim los ua haujlwm tau zoo nyob rau hauv qhov kub siab thiab cov xwm txheej corrosive ntawm formaldehyde synthesis. Ua los ntawm cov khoom siv ruaj khov, lawv ua kom muaj kev ua haujlwm ntev thiab kev saib xyuas raug.
Cov cuab yeej ntsuas methanol concentration, formaldehydecov ntsuas concentration, cov neeg saib xyuas, thiab cov khoom siv tshuaj ntsuam xyuas yog qhov tseem ceeb rau kev tswj cov inline concentration hauv formaldehyde synthesis, ua kom cov nroj tsuag tsim formaldehyde, cov nroj tsuag tsim tshuaj lom neeg, cov nroj tsuag petrochemical, thiab cov nroj tsuag tshuaj kom ua tiav kev ua haujlwm zoo tshaj plaws. Los ntawm kev muab cov ntaub ntawv tiag tiag, raug, cov cuab yeej no ua kom zoo dua cov xwm txheej tshuaj tiv thaiv, txo cov khib nyiab, thiab xyuas kom ua raws li cov qauv kev nyab xeeb thiab ib puag ncig. Npaj txhij los txhim kho koj cov txheej txheem tsim formaldehyde? Tiv tauj lonnmeter los tshawb nrhiav cov ntsuas concentration siab heev uas haum rau koj cov kev xav tau, qhib kev ua haujlwm zoo thiab zoo hauv koj cov haujlwm.
Lub sijhawm tshaj tawm: Lub Rau Hli-27-2025
