Nernst N2032-O2 / CO oxygen cov ntsiab lus thiab combustible gas ob-component analyzer

Daim ntawv thov ntau yam

Nernst N2032-O₂/ CO oxygen cov ntsiab lus thiab combustible gasOb lub ntsiab lus analyzeryog ib qho kev ntsuam xyuas dav dav uas tuaj yeem tshawb xyuas cov ntsiab lus ntawm cov pa oxygen, carbon monoxide thiab combustion efficiency hauv cov txheej txheem combustion.Nws tuaj yeem saib xyuas cov ntsiab lus oxygen thiab cov ntsiab lus carbon monoxide hauv cov pa roj thaum lub sijhawm lossis tom qab kev sib xyaw ntawm boilers, furnaces, thiab kilns.

Tus kws tshuaj ntsuam xyuas nrog Nernst O₂/ CO sojntsuam tuaj yeem ntsuas cov pa oxygen feem pua ​​O₂% nyob rau hauv lub tshuab hluav taws xob thiab qhov cub, tus nqi PPM ntawm carbon monoxide CO, tus nqi ntawm 12 combustible gases thiab combustion efficiency ntawm lub combustion cub nyob rau hauv lub sij hawm.

Cov yam ntxwv ntawm kev siv

Tom qab siv Nernst N2032-O₂/ CO oxygen cov ntsiab lus thiab combustible gasOb lub ntsiab lus analyzer, cov neeg siv tuaj yeem txuag tau ntau lub zog thiab tswj cov pa roj emissions.

Nernst N2032-O₂/ CO oxygen cov ntsiab lus thiab combustible gasOb lub ntsiab lus analyzeryog ib lub tshuab tshwj xeeb uas siv zirconia ob lub taub hau qauv tsim tom qab kaum xyoo ntawm kev tshawb fawb thiab tuaj yeem ntsuas cov ntsiab lus oxygen thiab carbon monoxide ib txhij.Tam sim no nws yog qhov tseeb hauv-kab ntsuas kev siv tshuab.Tsawg tus nqi, siab raug, tuaj yeem ntsuas hauv online raws li ntau yam dej noo thiab hmoov av siab.

Nyob rau hauv tus txheej txheem ntawm peroxygen combustion, thaum cov roj roj thiab cov combustion-txhawb cov pa mus txog ib tug tej yam dynamic equilibrium point, cov pa roj carbon monoxide cov ntsiab lus kuj yuav hloov nrog me ntsis kev hloov nyob rau hauv tus nqi ntawm cov pa oxygen.Qhov kev hloov ntawm cov pa oxygen cov ntsiab lus thiab kev hloov. qhov sib txawv ntawm cov pa roj carbon monoxide tsim ib qho kev sib tw superimposed.

Nernst O₂/CO soj ntsuam txoj cai

Nernst O₂/ CO sojntsuam muaj dual electrodes, uas tuaj yeem ntes ob qho tib si lub teeb liab oxygen thiab lub teeb liab combustible tib lub sijhawm.Vim tias tsis tiav cov pa roj carbon monoxide (CO), combustibles thiab hydrogen (H.₂).

Cov pa oxygen cell ntawm zirconia sojntsuam lossis oxygen sensor siv cov pa oxygen uas tsim los ntawm cov pa sib txawv ntawm cov pa oxygen nyob rau sab hauv thiab sab nraud ntawm zirconia ntawm qhov kub siab (ntau dua 650 ° C) los ntsuas cov pa oxygen ntawm qhov ntsuas qhov ntsuas. ib feem ntawm qhov kev sojntsuam yog ua los ntawm stainless hlau plhaub los yog alloy steel plhaub, uas yog tsim los ntawm alloy steel rhaub, zirconia raj, thermocouple, hlau, davhlau ya nyob twg board thiab lub thawv, saib cov schematic daim duab.Lub zirconia raj ntawm lub sojntsuam yog roj insulated los ntawm sab hauv thiab sab nraud ntawm lub raj zirconia los ntawm cov khoom sib txuas sib txuas.

Thaum qhov kub ntawm lub zirconia sojntsuam lub taub hau nce mus txog 650 ° C los yog siab dua los ntawm lub rhaub los yog sab nraud kub, qhov sib txawv ntawm cov pa oxygen nyob rau sab hauv thiab sab nrauv yuav tsim cov electromotive quab yuam nyob rau saum npoo ntawm zirconia.Qhov hluav taws xob muaj peev xwm ntsuas tau. los ntawm cov hlau lead sib txuas, thiab qhov ntsuas kub ntawm qhov tuaj yeem ntsuas los ntawm cov khoom siv thermocouple.

Thaum cov pa oxygen concentration nyob rau hauv thiab sab nraum lub zirconia raj paub, qhov sib thooj oxygen muaj peev xwm raug xam raws li zirconia muaj peev xwm xam mis.

Cov mis yog raws li nram no:

E (millivolts) =4F(RT)loge 

Qhov twg E yog qhov muaj peev xwm oxygen, R yog cov pa tsis tu ncua, T yog qhov ntsuas kub, PO₂INSIDE yog tus nqi siab ntawm cov pa oxygen hauv zirconia raj, thiab PO₂OUTSIDE yog tus nqi siab ntawm cov pa oxygen sab nraum lub zirconia raj.Raws li cov qauv, thaum cov pa oxygen concentration hauv thiab sab nraum lub zirconia raj sib txawv, cov khoom siv oxygen muaj peev xwm yuav raug tsim tawm. oxygen concentration nyob rau hauv thiab sab nraum lub zirconia raj yog tib yam, lub peev xwm oxygen yuav tsum yog 0 millivolt (mV).

Yog hais tias tus qauv atmospheric siab yog ib qho cua thiab cov pa oxygen concentration hauv huab cua yog 21%, cov qauv tuaj yeem yooj yim rau:

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Thaum lub peev xwm oxygen ntsuas nrog lub ntsuas ntsuas thiab cov pa oxygen concentration hauv lossis sab nraum lub raj zirconia paub, cov ntsiab lus oxygen ntawm qhov ntsuas tuaj yeem tau txais raws li cov qauv sib thooj.

Cov mis laij lej yog raws li hauv qab no: (Lub sijhawm no, qhov kub ntawm zirconia yuav tsum siab dua 650 ° C)

(%O₂) OUTSIDE (ATM) = 0.21 EXPT(-46.421 E)

Cov yam ntxwv nkhaus

Thaum ntsuas roj muaj O₂thiab CO tib lub sijhawm, vim qhov kub ntawm lub sensor thiab cov nyhuv catalytic ntawm platinum electrode cheeb tsam ntawm lub sensor, O₂thiab CO yuav hnov ​​​​mob thiab ncav cuag qhov ntsuas kub sib npaug ntawm lub xeev, PO₂ntawm qhov ntsuas tau hloov pauv kom cov pa oxygen ib nrab siab ntawm qhov sib npaug yog P'O₂.

Qhov no yog vim hais tias tom qab lub sensor tau qhib thaum kub siab, cov txheej txheem ntawm O₂thiab CO cov tshuaj tiv thaiv zoo sib npaug yog sib npaug rau cov txheej txheem O₂concentration diffusion.Thaum cov tshuaj tiv thaiv mus txog equilibrium, qhov diffusion ntawm O₂concentration kuj zoo li stabilize, yog li ntsuas oxygen ib nrab siab ntawm equilibrium yog P'O.₂.

Cov kev tshwm sim hauv qab no tshwm sim hauv qhov chaw tsis zoo ntawm ZrO₂roj teeb:

1/2 O₂(PO₂) + CO → CO₂

Thaum cov tshuaj tiv thaiv mus txog equilibrium, O₂concentration pauv, PO₂txo P'O₂, thiab hloov dua siab tshiab ntawm gaseous oxygen molecules thiab O₂hauv matrix yog:

Tsis zoo electrode:O₂ → 1/2 O₂(P'O₂) + 2e

Zoo electrode:1/2 O₂(PO₂) +2e → O₂

Lub roj teeb concentration sib txawv txheej txheem yog:1/2 O₂ (PO₂) → 1/2 O₂(P'O₂)

Thaum lub electromotive quab yuam ntawm lub sensor yog muab piv nrog tus naj npawb ntawm moles ntawm oxidation-txo roj, lub nkhaus yog ib tug yam ntxwv nkhaus zoo li ib tug titration nkhaus.

Cov duab ntawm tus yam ntxwv nkhaus nyob rau hauv tej qhov kub thiab txias, siab thiab ntws tus nqi, tib lub sensor muaj raws nraim tib yam ntxwv nkhaus rau tib hom roj system.

Yog li ntawd, nyob rau hauv lub atmospheric siab thiab ntsuas cov roj nyob rau hauv natural flow, kev sib piv ntawm lub electromotive quab yuam thiab tus naj npawb ntawm moles ntawm lub O.₂-CO system los ntawm zirconia sensor yog λ (λ = no2 / nco lossis ntim feem pua ​​λ = O₂ × V % / OCO × V %) tus yam ntxwv nkhaus.

Thaum Pt-Al₂O₃catalyst yog catalyzed ntawm 600 ° C, CO hauv aerobic system tuaj yeem hloov mus rau CO₂, yog li cov pa ntsuas tsuas muaj oxygen tom qab catalytic combustion.

Lub sijhawm no, zirconia sensor ntsuas qhov tseeb cov ntsiab lus oxygen.Vim yog kev sib raug zoo ntawm cov roj ntsuas raws li qhov kev txiav txim ntawm catalytic combustion, cov ntsiab lus CO hauv cov pa ntsuas tau ntsuas.Qhov kev sib raug zoo ntawm cov tshuaj tiv thaiv mis thiab qhov ntau ua ntej thiab tom qab catalytic combustion ntawm cov roj ntsuas yog raws li hauv qab no:

Piv txwv li, qhov concentration ntawm carbon monoxide nyob rau hauv cov pa ntsuas ua ntej catalysis yog (CO), cov concentration ntawm oxygen yog A1, thiab cov concentration ntawm oxygen nyob rau hauv cov pa ntsuas tom qab catalysis yog A, ces:

Ua ntej hlawv:(CO) A1

Tom qab hlawv:O A

Tom qab ntawd:A = A1 – (CO)/2

Thiab:λ = A1 / (CO)

Yog li:A = L ×(CO)-(CO)/2

Qhov tshwm sim:(CO)= 2A /(2 l-1)    (lwj 0.5)

Tus qauv qauv ntawm O₂/CO probe

Lub O₂/ CO sojntsuam tau ua cov kev hloov pauv raws li qhov kev sojntsuam thawj zaug kom paub txog qhov kev tswj xyuas kev sib txuas tshiab.Ntxiv rau kev kuaj xyuas cov pa oxygen thaum lub sijhawm ua haujlwm, qhov kev sojntsuam tseem tuaj yeem kuaj xyuas cov combustion tsis tiav (CO / H.₂), vim tias carbon monoxide (CO) thiab hydrogen (H₂) coexist nyob rau hauv lub flue gas ntawm tsis tiav combustion.

Kev sojntsuam yog lub hauv paus ntsiab lus uas siv cov txheej txheem electrochemical tom qab cua sov ntawm zirconia kom paub qhov ntsuas.

A. O₂electrode (platinum)

B. COe electrode (platinum / precious hlau)

C. Tswj electrode (platinum)

Cov ntsiab lus tseem ceeb ntawm kev sojntsuam yog cov ntawv zirconia composite welded rau ntawm lub raj corundum los tsim ib lub raj kaw thiab raug rau cov pa roj hluav taws xob ntawm cov kab hluav taws xob sib txuas. nce kev pab cuam lub neej.

Kev ua haujlwm ntawm COe electrode thiab O₂electrode yog tib yam, tab sis qhov sib txawv ntawm ob lub electrodes yog electrochemical thiab catalytic zog ntawm raw cov ntaub ntawv, kom cov combustible Cheebtsam nyob rau hauv lub flue gas xws li CO thiab H.₂tuaj yeem txheeb xyuas thiab kuaj pom.Nyob rau hauv lub xeev ntawm kev ua tiav, qhov "Nernst" voltage UO₂kuj yog tsim los ntawm COe electrode, thiab ob lub electrodes no muaj cov yam ntxwv nkhaus tib yam.Thaum kuaj pom tsis tiav combustion los yog combustible Cheebtsam, lub non-"Nernst" voltage UCOe kuj yuav raug tsim nyob rau hauv lub COe electrode, tab sis cov yam ntxwv nkhaus ntawm ob electrodes txav nyias.(Saib cov duab kos rau ob lub sensors)

Voltage teeb liab UCO / H₂ntawm tag nrho cov sensor yog lub teeb liab voltage ntsuas los ntawm COe electrode.Cov teeb liab no suav nrog ob lub teeb liab hauv qab no:

UCO/H₂(tag nrho sensor) = UO₂(Cov ntsiab lus oxygen) + UCO₂/H₂(flammable Cheebtsam)

Yog tias cov ntsiab lus oxygen ntsuas los ntawm O₂electrode yog rho tawm los ntawm lub teeb liab ntawm tag nrho cov sensor, qhov xaus yog:

UCOe (combustible component) = UCO/H₂(tag nrho sensor)-UO₂(oxygen cov ntsiab lus)

Cov qauv saum toj no tuaj yeem siv los suav cov khoom sib xyaw COe ntsuas hauv ppm.Qhov kev sojntsuam sensor yog lub cim hluav taws xob raug tus yam ntxwv.Cov duab qhia tau hais tias ib txwm nkhaus (dashed kab) ntawm COe concentration thaum cov pa oxygen maj mam txo.

Thaum combustion nkag mus rau hauv ib cheeb tsam uas tsis muaj huab cua, nyob rau hauv lub thiaj li hu ua "emission edge", thaum huab cua tsis txaus ua rau tsis tiav combustion, tus coj COE concentration yuav nce ho.

Cov yam ntxwv tau txais cov cim qhia tau pom nyob rau hauv daim duab kos duab nkhaus.

UO₂(nruam kab) thiab UCO/H₂(dotted kab).

Thaum cov huab cua tshaj tawm thiab cov combustion yog kiag li dawb ntawm COe Cheebtsam, lub sensor teeb liab UO₂thiab UCO/H₂yog tib yam, thiab raws li "Nernst" hauv paus ntsiab lus, tam sim no cov pa oxygen cov ntsiab lus ntawm flue gas channel tau tshwm sim.

Thaum mus txog "kho tawm ntug", tag nrho cov teeb liab hluav taws xob hluav taws xob UCO / H₂ntawm COe electrode nce ntawm tus nqi tsis sib xws vim qhov ntxiv tsis yog-Nernst COe teeb liab.Rau qhov hluav taws xob teeb liab yam ntxwv ntawm lub sensor: UO₂thiab UCO/H₂txheeb ze rau cov ntsiab lus ntawm cov pa oxygen hauv cov pa hluav taws xob, cov yam ntxwv ntawm cov khoom siv hluav taws xob COe kuj tau tshwm sim ntawm no.

Ntxiv nrog rau qhov voltage signals ntawm lub sensors UCO / H₂thiab UO₂, tus kuj dynamic sensor signals dU O₂/dt thiab dUCO/H₂/ dt thiab tshwj xeeb tshaj yog cov teeb liab hloov pauv ntawm COe electrode tuaj yeem siv los ntsuas qhov "emission edge" ntawm combustion.

(Saib "Tsis tiav combustion: qhov sib txawv voltage ntawm COe electrode UCO / H₂“)

Technical yam ntxwv

•Dual sojntsuam input muaj nuj nqi: Ib lub ntsuas ntsuas tuaj yeem nruab nrog ob qhov kev sojntsuam, uas tuaj yeem txuag tus nqi siv thiab txhim kho kev ntsuas kev ntseeg tau.

•Ntau qhov tso zis muaj nuj nqi: Lub analyzer muaj ob 4-20mA tam sim no teeb liab tso zis thiab lub computer-computer kev sib txuas lus interface RS232 los yog network interface RS485.Ib qho channel ntawm cov pa oxygen tso zis, lwm channel ntawm CO teeb liab tso zis.

•Kev ntsuas ntau: Qhov ntsuas pa oxygen yog 10^-30mus rau 100% cov ntsiab lus oxygen, thiab cov pa roj carbon monoxide ntsuas ntau yog 0-2000PPM.

•Kev teeb tsa lub tswb:Lub analyzer muaj 1 lub tswb tso zis dav dav thiab 3 programmable tswb outputs.

• Tsis siv neeg calibration:Lub ntsuas ntsuas yuav cia li saib xyuas ntau lub tshuab ua haujlwm thiab tuaj yeem ntsuas ntsuas kom ntseeg tau qhov tseeb ntawm lub ntsuas ntsuas thaum ntsuas.

•Intelligent system:Lub ntsuas ntsuas tuaj yeem ua tiav cov haujlwm ntawm ntau qhov chaw raws li qhov ntsuas tau ua ntej.

•Zaub tso zis muaj nuj nqi:Lub analyzer muaj ib tug muaj zog ua hauj lwm ntawm displaying ntau yam tsis thiab ib tug muaj zog tso zis thiab tswj muaj nuj nqi ntawm ntau yam tsis.

•Kev nyab xeeb muaj nuj nqi:Thaum lub tshuab hluav taws xob tsis siv, tus neeg siv tuaj yeem tswj kom tua lub tshuab cua sov ntawm kev sojntsuam kom muaj kev nyab xeeb thaum siv.

•Installation yog yooj yim thiab yooj yim:lub installation ntawm lub analyzer yog yooj yim heev thiab muaj ib tug tshwj xeeb cable mus txuas nrog lub zirconia sojntsuam.

Specifications

Cov tswv yim

• Ib lossis ob lub zirconia probes lossis ib qho zirconia sojntsuam + CO sensor

• Flue los yog spare qhov ntsuas kub hom K, R, J, S hom

• Siab gas purg signal input

• Xaiv ob hom roj sib txawv

• Kev tiv thaiv kev ua haujlwm tsis muaj pov thawj tawg (tsuas yog siv tau rau kev sojntsuam cua sov)

Cov zis

Ob kab tawm 4 ~ 20mA DC teeb liab tso zis (qhov siab tshaj plaws 1000Ω)

• Thawj qhov tso zis ntau yam (yeem)

Tawm tawm tawm 0 ~ 1% rau 0 ~ 100% cov ntsiab lus oxygen

Logarithmic tso zis 0.1 ~ 20% oxygen cov ntsiab lus

Micro-oxygen tso zis 10^-39rau 10^-1cov ntsiab lus oxygen

• Qhov thib ob tso zis ntau yam (tuaj yeem xaiv los ntawm cov hauv qab no)

Cov ntsiab lus carbon monoxide (CO) PPM tus nqi

Cov pa roj carbon dioxide (CO₂)%

Kev ntsuas roj hluav taws xob ntsuas PPM tus nqi

Combustion efficiency

Log oxygen tus nqi

Anoxic combustion nqi

Flue kub

Secondary Parameter Zaub

• Cov pa roj carbon monoxide carbon (CO) PPM

• Combustible gas combustion efficiency

• Tshawb xyuas qhov tso zis voltage

• Qhov kub ntawm qhov kev sojntsuam

• Ambient kub

• Hnub Xyoo Ib Hlis

• Ib puag ncig cov av noo

• Kub kub

• Tshawb xyuas impedance

• Hypoxia index

• Lub sijhawm ua haujlwm thiab kev saib xyuas

Kev sib txuas lus hauv computer / tshuab luam ntawv

Lub ntsuas ntsuas muaj RS232 lossis RS485 serial output chaw nres nkoj, uas tuaj yeem txuas ncaj qha mus rau lub khoos phis tawj lossis lub tshuab luam ntawv, thiab kev sojntsuam thiab ntsuas tuaj yeem kuaj tau los ntawm lub computer.

Plua plav tu thiab cov qauv roj calibration

Lub analyzer muaj 1 channel rau tshem tawm plua plav thiab 1 channel rau standard gas calibration los yog 2 raws rau standard gas calibration output relays, thiab ib tug solenoid valve hloov uas yuav ua tau los yog manually.

Qhov tseebP

± 1% ntawm cov pa oxygen tiag tiag nrog kev rov ua dua ntawm 0.5%.Piv txwv li, ntawm 2% oxygen qhov tseeb yuav yog ± 0.02% oxygen.

TswbP

Lub ntsuas ntsuas muaj 4 lub tswb nrov nrog 14 lub zog sib txawv, thiab 3 lub tswb nrov.Nws tuaj yeem siv rau cov cim ceeb toom xws li siab thiab qis cov pa oxygen, siab thiab qis CO, thiab kev sojntsuam tsis raug thiab ntsuas qhov yuam kev.

Zaub ntau yamP

Tsis siv neeg tso saib 10^-30100% O2 oxygen cov ntsiab lus thiab 0ppm ~ 2000ppm CO carbon monoxide cov ntsiab lus.

Kev siv rojP

Cua muab los ntawm micro-motor vibration twj tso kua mis.

Lub zog muaj zog

85VAC rau 264VAC 3A

Ua haujlwm kub

Ua haujlwm kub -25 ° C txog 55 ° C

Relative Humidity 5% mus rau 95% (tsis-condensing)

Qib Kev Tiv Thaiv

IP65

IP54 nrog kev siv cua twj tso kua mis

Dimensions thiab Nyhav

300mm W x 180mm H x 100mm D 3kg