Fais Fab Kev Saib Xyuas: Thermocouples hauv Boilers, Turbines, thiab Flue Gas Stacks

Cov neeg ua haujlwm cog hluav taws xob feem ntau cuam tshuam nrog kev sib tw ntawm qhov ntsuas kub kom raug nyob rau hauv qhov chaw ua haujlwm hnyav- boilers roaring ntawm huab cua kub, turbines spinning ntawm high speeds, thiab flue gas stacks emitting corrosive fumes. Ib cov ntaub ntawv ntsuas kub tsis zoo tuaj yeem ua rau lub sijhawm tsis tau npaj tseg, txo kev ua haujlwm, lossis txawm tias muaj kev nyab xeeb. Ntawm tag nrho cov ntsuas kub, cov thermocouples sawv tawm raws li mus- daws cov chaw tseem ceeb no, thiab nkag siab tias lawv ua haujlwm li cas thiab siv lawv li cas kom raug yog qhov tseem ceeb ntawm kev tswj xyuas cov nroj tsuag kom zoo.

Thermocouples ua haujlwm ntawm cov nyhuv Seebeck, qhov twg qhov hluav taws xob tsim tawm thaum ob lub xov hlau sib txawv tau koom nrog ntawm ib qho kawg (kev ntsuas qhov sib txuas) thiab raug kub hnyiab los ntawm lwm qhov kawg (qhov kev sib tshuam siv). Tsis zoo li cov ntsuas kub ntsuas (RTDs) uas xav tau lub zog hluav taws xob thiab raug txwv los ntawm qhov ntsuas kub qis, cov thermocouples ua tau zoo nyob rau hauv siab - qhov kub thiab txias - qee hom tuaj yeem tiv taus txog 2300 degree, ua rau lawv zoo tagnrho rau boilers thiab turbines. Raws li kev paub dhau los, K-hom thermocouples yog cov khoom siv dav tshaj plaws hauv cov chaw tsim hluav taws xob vim lawv qhov sib npaug ntawm qhov kub thiab txias (-270℃txog 1260 degree), durability, thiab nqi{10}}effectiveness. J- hom thermocouples, ntawm qhov tod tes, yog qhov zoo dua rau cov ntawv thov hluav taws xob qis dua tab sis muaj kev cuam tshuam ntau dua rau oxidation ntawm qhov kub thiab txias, yog li xaiv cov khoom siv yuav tsum ua raws li cov haujlwm tshwj xeeb.

Kev teeb tsa thiab kev saib xyuas yog ib qho tseem ceeb xws li xaiv hom thermocouple txoj cai. Hauv cov boilers, cov thermocouples yuav tsum tau muab ntsia kom deb ntawm cov nplaim taws ncaj nraim -Qhov tseeb, muab lawv ze rau ntawm cov nplaim taws tuaj yeem ua rau kub dhau thiab ua tsis tiav, thaum muab tso rau lawv deb dhau yuav txo qhov ntsuas qhov tseeb. Rau turbines, kev co kuj yog ib qho yuav tsum tau; Thermocouple sojntsuam nrog armored sheaths raug pom zoo los tiv thaiv cov hlau tawg los ntawm kev ntxhov siab tas li. Hauv cov khoom siv hluav taws xob hluav taws xob, kev xeb yog qhov kev txhawj xeeb loj- siv cov thermocouples nrog Inconel sheaths tuaj yeem ua kom ntev kev pab cuam lub neej nyob rau hauv corrosive flue gas ib puag ncig.