Puas yog lub refractory castable rau lub qhov hluav taws xob hluav taws xob ntawm CFB boiler ib txwm poob? YUAV UA LI CAS!

Lub caij nplooj zeeg ntawm refractory castable ntawm lub ignition cua duct ntawm circulating fluidized txaj boiler yog ib tug ntau boiler hauv ob sab phlu zoo kev huam yuaj. Qhov no yog ib tug refractory qauv. Raws li cov qauv, nws tau muab faib ua qhov tsis muaj qhov siab ntawm cov qauv refractory, thiab raws li lub hom phiaj tsim, nws yog rwb thaiv tsev kub, txuag hluav taws xob thiab cov qauv refractory.
Cov khoom siv refractory yog tsim los ua cov khoom sib xyaw ua ke, tsau nrog Y-pins, thiab muab faib ua ob txheej ntawm cov khoom siv casting. Lub thickness ntawm thermal rwb thaiv tsev casting khoom nyob ze ntawm lub innermost hlau phaj yog 140mm. Nws yog tsim los ntawm ceramsite, ntab hlaws, cement, hmoov zoo, additives thiab lwm yam ntaub ntawv. ; Qhov thib ob txheej yog refractory castable nrog ib tug tuab ntawm 60 hli, thiab cov ntaub ntawv tseem ceeb yog refractory aggregates, micro-floaters, cement, nplua hmoov, additives, thiab lwm yam).
Kev tshuaj xyuas ntawm qhov ua rau Castable poob ntawm Ignition Cua Channel
(1) Thaum lub sij hawm tsim kho ntawm lub qhov hluav taws xob hluav taws xob, qhov kev tsim kho sab saum toj tsis xav txog qhov cuam tshuam ntawm vaporization ntawm cov dej castable tso tawm cov vapor, thiab cov vapor tsub zuj zuj thaum lub sij hawm tsim kho tsis tuaj yeem tshem tawm hauv lub sijhawm. Tom qab lub vapor yog rhuab thiab nthuav, nws yuav ua rau lub rwb thaiv tsev txheej thiab refractory txheej. Muaj qhov sib txawv ntawm cov castables, ua rau ob txheej ntawm cov castables yuav tsum tau koom nrog tsis raug.
(2) Vim muaj teeb meem ntawm qhov cub thiab cov cua tis nyob rau hauv cov txheej txheem ignition, lub zos kub kub yog tshwm sim, uas tshaj lub softening kub ntawm cov khoom refractory thiab ua rau lub cev qhuav dej.
(3) Lub castable collapses vim tsis muaj pins ntawm cov ces kaum uas lub ignition cua duct thiab cov thawj cua duct yog txuas.
(4) Ua tsis tau raws li cov huab cua ntim thaum lub sij hawm ignition ua rau lub zos tshaj kub nyob rau hauv lub ignition cua duct kom carbonize tus pins, uas yuav tsis ua hauj lwm thiab ua rau lub refractory castable poob.
(5) Tus pin siv rau lub qhov hluav taws xob hluav taws xob yog 1Cr18Ni9Ti thiab nws qhov kev ua haujlwm kub yog 1050-1150 degree . Yog li ntawd, thaum qhov kub thiab txias nyob rau hauv lub ignition cua ducts tshaj 1300 degree, cov khoom refractory nws tus kheej yog tsis thermally insulated, thiab qhov kub nyob rau hauv lub pin cheeb tsam kuj yog 1200-1250 degree. Qhov kev pabcuam kub ntawm tus pin tau dhau lawm, ua rau tus pin tau carbonized, ua rau lub castable poob.
(6) Hauv kev tsim, nws yuav tsum muaj qhov sib txawv, feem ntau 3 hli. Vim hais tias cov expansion coefficients ntawm refractory cov ntaub ntawv thiab hlau yog txawv, yog hais tias tus tswj tsis zoo thaum lub sij hawm pib-up, kub nyob rau hauv lub ignition duct yuav nce dheev, ua rau lub zos expansion pob qij txha tawg. Cov nplaim hluav taws tso cai rau nkag mus rau hauv cov khoom txuag hluav taws xob, thiab cov khoom siv txuag hluav taws xob tau hlawv tawm, ua rau muaj qhov sib txawv ntawm cov khoom txuag hluav taws xob thiab cov khoom siv refractory. Vim qhov sib txawv, tus pin yog ncaj qha tiv tauj nrog cov nplaim taws, ua rau overfire thiab carbonization thiab ua rau nws poob. Qhov kub ntawm cov rwb thaiv tsev thermal castable yog 600-800 degree, thiab nplaim taws kub yog 1200-1500 degree .
kev txhim kho kev ntsuas
Tsim ib txoj kev kho kom haum xeeb los ntawm kev txheeb xyuas cov laj thawj. Txoj kev tshwj xeeb yog raws li nram no:
(1) Hloov cov ntaub ntawv refractory
Cov khoom siv refractory siv nyob rau hauv thawj tsim muaj refractoriness ntawm 1670 degree. Nyob rau hauv cheeb tsam no, qhov theoretical combustion kub ntawm roj yog hais txog 1900 degree. Yog tias cov roj kub kub tsis tuaj yeem muab tshem tawm hauv lub sijhawm, nws yuav ua rau cov khoom siv refractory dhau qhov kub thiab txias. Vim li no, hloov nws nrog cov khoom siv hluav taws xob refractory nrog qhov kub ntawm 1900 degree, thiab tau tsim ua raws li cov txheej txheem nruj.
(2) Tsim nyog configuration ntawm tus pin tsim qhov sib nrug
Thaum lub sij hawm tsim kho, tus pin sib nrug ntawm qhov qis ntawm qhov hluav taws xob hluav taws xob hluav taws xob tau txo qis, thiab qhov qis tau hloov ntawm 230mm mus rau 300mm. Ua kom tus pin sab saum toj sib nrug ntawm 230mm mus rau 150mm los ntawm tus qauv qub.
(3) Siv 1Cr18Ni9Ti steel tuav nrog ib txoj kab uas hla ntawm 6 hli ntawm tus pin sab saum toj ntawm lub qhov hluav taws xob cua duct los tsim ib lub mesh nrog qhov sib nrug ntawm 300 × 300 kom ntxiv dag zog rau nws cov rigidity.
(4) Hauv kev tsim kho, txhawm rau tiv thaiv cov nplaim taws los ntawm kev nkag mus ntawm cov thermal rwb thaiv tsev castable thiab refractory castable, 40mm tuab high-temperature aluminium silicate pob zeb wool pam thiab high-temperature ceramic fiber ntawv tau ntxiv. Qhov no tiv thaiv cov cua kub kub los ntawm kev nkag mus rau thermal rwb thaiv tsev castable los ntawm cov pob qij txha tshwj xeeb, thiab tiv thaiv cov thermal rwb thaiv tsev castable los ntawm qhov kub thiab txias tsis ua hauj lwm thiab ua rau qhov sib txawv ua rau lub castable poob.
(5) Thaum ziab lub ignition cua duct castable, laum lub qhov tso pa kom tsim nyog. Qhov sib nrug ntawm lub qhov feem ntau txiav txim siab raws li qhov yuav tsum tau ua ntawm cov chaw tsim khoom castable. Tom qab nruab nrab kub sintering, ua ntej kub sintering, txhua lub qhov yuav tsum tau thaiv kom tsis txhob kub. Txoj hlua hluav taws kub thaum lub sij hawm sintering kuj ua kom ntseeg tau tias cov cua kub-txheej castable thiab pins tsis pub dhau qhov kev pabcuam kub.
(6) Tsim nyog faib cov huab cua, txo cov huab cua hauv paus kom ntau li ntau tau nyob rau hauv thawj theem ntawm ignition, nce lub ignition cua ntim thiab peripheral cua nyob rau hauv lub ignition cua duct, thiab tiv thaiv cov nplaim ntawm deviating los ntawm qhov chaw. ignition cua duct thiab ua rau lub zos overheating.
(7) nruj me ntsis tswj qhov kub thiab txias nyob rau hauv lub ignition cua duct thiab cia nws nyob rau hauv 1200 degree ntau npaum li sai tau, yog li tiv thaiv qhov teeb meem ntawm tus pin carbonization.
nyob rau hauv xaus
Los ntawm kev txhim kho cov cuab yeej siv hluav taws xob hluav taws xob hluav taws xob hluav taws xob hluav taws xob hluav taws xob hluav taws xob hluav taws xob hluav taws xob thiab cov khoom siv refractory, thiab cov txheej txheem sintering, qhov kub thiab txias yog tswj nruj me ntsis raws li qhov kub nce nkhaus xav tau los ntawm cov chaw tsim khoom. Thaum lub sij hawm pib txheej txheem, cov nplaim hluav taws kub hauv qhov hluav taws xob hluav taws xob yog tswj hwm nruj thiab saib xyuas thiab qhov tsim nyog huab cua faib tau zoo. Qhov no zoo tiv thaiv qhov tshwm sim ntawm refractory ntog tawm hauv qhov hluav taws xob cua duct.