Qhov Tseem Ceeb Qhov txawv - Subcritical vs Supercritical Boiler
Boilers yog kaw cov hlab ntsha uas muaj cov kua dej rhuab, feem ntau yog dej. Txawm hais tias lub npe ntawm qhov no yog boiler, cov kua dej tsis tas yuav boiler hauv qhov no. Cov kua rhuab yog siv ntau yam kev siv xws li dej cua sov, nruab nrab cua sov, ua noj ua haus, thiab lwm yam. Subcritical thiab supercritical boilers yog xws li chav generating systems. Qhov sib txawv tseem ceeb ntawm Subcritical thiab supercritical boiler yog tias Subcritical boilers ua hauj lwm ntawm lub subcritical siab ntawm cov kua hos supercritical boilers ua hauj lwm ntawm ib tug supercritical siab ntawm cov kua.
Lub ntsiab lus tseem ceeb yog dab tsi?
Lub ntsiab lus tseem ceeb ntawm cov khoom yog qhov kub thiab txias uas cov khoom tuaj yeem coj zoo li cov pa roj thiab cov kua hauv tib lub sijhawm, yog li qhov tsis paub qhov txawv ntawm cov roj thiab cov kua theem tshwm sim. Qhov ntawd yog vim qhov ceev ntawm cov roj theem thiab cov kua theem sib npaug ntawm qhov no. Ib yam khoom uas muaj nyob rau ntawm qhov kub thiab txias, siab tshaj nws qhov tseem ceeb yog lub npe hu ua supercritical kua. Ib yam khoom uas tawm hauv qab nws cov ntsiab lus tseem ceeb yog hu ua subcritical kua. Nyob rau hauv ib theem equilibrium nkhaus, qhov tseem ceeb point yog qhov kawg point ntawm qhov nkhaus.
Daim duab 01: Daim duab Phaj uas qhia txog qhov tseem ceeb ntawm dej
Lub sij hawm supercritical nyob rau hauv supercritical boilers yog hais txog qhov siab tshaj qhov tseem ceeb ntawm cov dej uas lub boiler tau ua. Lub ntsiab lus tseem ceeb ntawm cov dej yog ntawm 647 K kub thiab 221 bar (22.1 MPa) siab. Qhov siab tshaj 221 bar yog hu ua "subcritical siab" thiab siab dua 221 bar yog "supercritical siab" ntawm dej.
Lub Boiler Subcritical yog dab tsi?
Subcritical boilers yog boilers uas ua hauj lwm ntawm kub txog 374 ° C thiab ntawm ib tug siab ntawm 3,208 psi (qhov tseem ceeb ntawm cov dej). Cov boilers no tsim ib qho system nrog qhov kawg ntawm evaporation. Ib qho piv txwv zoo rau lub boiler subcritical yog lub nruas-hom chav generator.
Inside lub boiler, lub ntuj ncig ntawm cov kua yog generated los ntawm cua sov cov risers. Cov dej thiab chav sib tov uas tawm hauv qhov riser yog tom qab ntawd sib cais rau hauv dej thiab chav nyob hauv lub nruas. Cov dej ntws mus, cov dej rov qab mus rau lub evaporator inlet los ntawm cov ces kaum thaum lub zog ntws mus rau hauv lub tshuab rhaub dej kub.
Daim duab 02: Lub Chaw Thermal Fais Fab
Yog tias cov kua dej tso cai rau kev ua haujlwm zoo, qhov kev thov ntau yog txwv rau li 190 bar raws li qhov siab tshaj plaws nruas. Tab sis yog tias kev ncig ua tiav siv lub twj tso kua mis, (lub npe hu ua yuam kev), qhov no tuaj yeem txuas ntxiv. Qhov kev txuas ntxiv no tshwm sim vim yog kho qhov kawg ntawm evaporation hauv lub nruas. Thiab tseem, nws teev qhov luaj li cas ntawm cov cua sov saum npoo ntawm lub evaporator thiab nyob rau hauv lub super-heater. Ib qho teeb meem loj ntawm lub boiler subcritical yog, nyob rau hauv cov boilers no, npuas tsim yuav tshwm sim.
Lub Boiler Supercritical yog dab tsi?
Supercritical boiler (supercritical steam generator) yog ib hom boiler uas ua haujlwm nyob rau hauv supercritical siab. Hom boilers no feem ntau siv los tsim hluav taws xob. Tsis zoo li hauv subcritical boilers, tsis muaj npuas tsim nyob rau hauv supercritical boilers, thiab kua dej tam sim ntawd hloov mus rau hauv chav.
Supercritical boiler ua haujlwm ntawm qhov kub ntawm 538-565 ° C thiab siab tshaj 3, 200 psi. Lub boiler supercritical muaj ib qho system nrog qhov sib txawv evaporation kawg. Cov boilers no tsis tshua muaj nruas. Yog li ntawd, lub evaporation yuav siv sij hawm qhov chaw ntawm ib tug dhau los ntawm lub evaporator. Kev khiav dej num, feem ntau ntawm lub sijhawm; dej, yog induced los ntawm lub twj tso kua mis pub. Qhov no ua rau lub kaw lus ua haujlwm ntawm txhua qhov kev xav tau, ua kom nws ua haujlwm ntawm cov txheej txheem subcritical lossis cov xwm txheej supercritical. Yog li ntawd, qhov kawg ntawm evaporation sib txawv. Thiab tseem, txhawm rau tswj xyuas cov xwm txheej no, cov evaporator thiab cov cua kub cua sov tau hloov kho raws li qhov xav tau.
Daim duab 03: Ib Lub Tube Dej Boiler
Lub boiler no yog lub npe hu ua supercritical boiler vim tias nws tau ua haujlwm siab tshaj qhov tseem ceeb ntawm cov dej uas yog 221 bar. Txij li saum toj no qhov tseem ceeb, tsis muaj qhov sib txawv ntawm chav thiab dej, dej ua raws li cov kua dej.
Tshaj qhov tseem ceeb ntawm cov dej, qhov cua sov ntawm vaporization yog xoom, thiab yog li tsis muaj qhov sib txawv ntawm cov kua theem thiab theem vapor ntawm cov dej. ib qho ntawm qhov zoo ntawm supercritical boilers yog tsawg dua roj noj. Qhov no ua rau tsawg dua ntawm cov tsev cog khoom gases. thiab tseem, vim tsis muaj npuas tsim, kev siv dej tsawg tuaj yeem pom.
Dab tsi zoo sib xws ntawm Subcritical thiab Supercritical Boiler?
- Qhov kev ua haujlwm yooj yim / lub voj voog ntawm Subcritical thiab Supercritical Boiler yog tib yam.
- Tshwj tsis yog lub nruas-tsawg evaporators hauv supercritical boilers, lwm yam kev tsim kho kuj zoo ib yam.
- Cov txheej txheem ntawm ob qho tib si Subcritical thiab Supercritical Boiler siv cov cuab yeej zoo sib xws thiab cov tswv yim hauv kev ua haujlwm. i.e. cua preheater, economizer, turbines, condensers, boiler pub twj, thiab lwm yam.
Qhov txawv ntawm Subcritical thiab Supercritical Boiler yog dab tsi?
Subcritical vs Supercritical Boiler |
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| Subcritical boilers yog boilers uas ua haujlwm ntawm qhov kub txog 374 ° C thiab ntawm qhov siab ntawm 3,208 psi (qhov tseem ceeb ntawm cov dej). | Supercritical boiler (supercritical steam generator) yog ib hom boiler uas ua haujlwm nyob rau hauv lub siab supercritical. |
| Subcritical boilers yog ua haujlwm ntawm qhov kub txog li 374 ° C. | Supercritical boilers yog ua haujlwm ntawm qhov kub ntawm 538-565 ° C. |
| Subcritical boilers yog ua haujlwm ntawm qhov siab ntawm 3, 208 psi. | Supercritical boilers yog ua haujlwm ntawm qhov siab tshaj 3,200 psi. |
| Nruas | |
| Subcritical boilers yog tsim los ntawm nruas. | Supercritical boilers yog nruas-tsawg. |
| npub tsim | |
| npuas tsim yog qhov teeb meem loj hauv subcritical boilers. | Tsis muaj npuas tsim supercritical boilers. |
Summary – Subcritical vs Supercritical Boiler
Subcritical thiab supercritical boilers yog ob hom ntawm cov tshuab hluav taws xob uas siv los tsim hluav taws xob. Cov no yog categorized li xws li, raws li lawv cov kev khiav hauj lwm tej yam kev mob. Qhov txawv ntawm Subcritical thiab supercritical boiler yog tias Subcritical boilers ua hauj lwm ntawm lub subcritical siab ntawm cov kua hos supercritical boilers ua hauj lwm ntawm ib tug supercritical siab ntawm cov kua.
Download PDF Version ntawm Subcritical vs Supercritical Boiler
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