Daim ntawv thov Scope thiab cov kev cai ntawm lub hwj chim chaw nres tsheb li qub (IV)

Daim ntawv thov Scope thiab cov kev cai ntawm lub hwj chim chaw nres tsheb li qub (IV)

Daim ntawv thov hluav taws xob valve, yog los txo cov neeg ua hauj lwm kev siv zog thiab tsim nyog nyob rau hauv qhov chaw ua hauj lwm tsis zoo, hluav taws xob valve muaj lub cev muaj zog, iav lub thawv thiab lub cev, feem ntau yog nyob rau hauv kev ua hauj lwm nquag vim muaj tej yam xws li kev co, kub, sealing aging feem ntau ntau yam roj. teeb meem to, iav lub thawv xau loj ib puag ncig muaj kuab paug tsis tsuas yog muaj qee qhov kev nyab xeeb kev nyab xeeb. Cov lus qhia txog kev nyab xeeb kev nyab xeeb tshwm sim los ntawm "khiav, khiav, poob thiab xau" ntawm cov cuab yeej tseem tau txais kev saib xyuas tas li rau hauv kev tswj cov khoom siv. Lub iav lub thawv xau roj, vim yog cov khoom siv qauv, kev siv ib puag ncig, kev ua haujlwm tas mus li thiab lwm yam kev mob, nyob rau hauv ib txwm muaj kev hloov ntawm qhov chaw, nrog rau kev hloov ntawm sealing ntsuas.
Ua rau thiab kev tsom xam ntawm cov roj to hauv hluav taws xob valve gearbox
Daim ntawv thov hluav taws xob valve, yog los txo cov neeg ua hauj lwm kev siv zog thiab tsim nyog nyob rau hauv qhov chaw ua hauj lwm tsis zoo, hluav taws xob valve muaj lub cev muaj zog, iav lub thawv thiab lub cev, feem ntau yog nyob rau hauv kev ua hauj lwm nquag vim muaj tej yam xws li kev co, kub, sealing aging feem ntau ntau yam roj. teeb meem to, iav lub thawv xau loj ib puag ncig muaj kuab paug tsis tsuas yog muaj qee qhov kev nyab xeeb kev nyab xeeb. Cov lus qhia txog kev nyab xeeb kev nyab xeeb tshwm sim los ntawm "khiav, khiav, poob thiab xau" ntawm cov cuab yeej tseem tau txais kev saib xyuas tas li rau hauv kev tswj cov khoom siv. Vim qhov kev txwv ntawm cov khoom siv, ib puag ncig kev ua haujlwm thiab kev ua haujlwm tsis tu ncua, cov roj to ntawm lub thawv iav yog qhov nyuaj kom ceev thiab ua haujlwm zoo hauv cov kev daws teeb meem ntawm kev hloov cov khoom thiab sealing.
Tag nrho lub peev xwm nruab ntawm Huaneng Fais Fab Cog yog 2060MW, thiab qhov kev nthuav dav ntawm 2 × 1000MW units tau tshwj tseg rau theem peb. Chav tsev 2 × 350MW ntawm thawj theem project yog lub tsev tsim khoom tsim los ntawm Tuam Tshoj thiab txawv teb chaws. Kev xaiv cov cuab yeej tseem ceeb yog qib siab, kev npaj yog compact, chav tsev muaj kev lag luam siab, thiab kev tiv thaiv kev ua haujlwm zoo meej. Nws yog niaj hnub thermal fais fab nroj tsuag nrog qib siab ntawm automation hauv Suav teb. Qhov thib ob theem ntawm qhov project yog 2 × 680MW domestic supercritical thee-fired units, ib txhij kev tsim kho ntawm seawater flue gas desulfurization ntaus ntawv.
Daim ntawv thov teb ntawm cov ntaub ntawv Carbon nanopolymer hauv kev kho cov xau ntawm iav casing los ntawm Soley Kev Lag Luam
Cov txheej txheem ua haujlwm ntawm qhov chaw yog raws li nram no:
1, ntxuav cov roj to, txhuam ib ncig ntawm qhov to, kom nws pom cov xim thawj xim, ntsia liaj qhov rooj qhov chaw kuj tseem kho;
2, ntxuav, kho deg yuav tsum huv, qhuav, khoom, ntxhib;
3. Muab cov khoom siv SD2240 los muab cov khoom xau hauv ib qho me me kom txog thaum tsis muaj qhov to;
4. Tom qab qhov saum npoo ntawm cov khoom kho tau zoo, cov khoom siv tau npog nrog SD7111C dua. Cov khoom yog kho thiab kho.
Daim ntawv thov Scope thiab cov kev cai ntawm lub hwj chim chaw nres tsheb valve (iv) Qhov siab tshaj plaws kev pab cuam qhov kub ntawm cov bearings ntawm lub plhaub tsis xav txog qhov tso cai kub sib txawv ntawm lub boiler thaum lub sij hawm ua hauj lwm, thiab tus nqi sib txawv yuav tsum tau raws li cov kev cai ntawm SDGJ6. -1990. Kev saib xyuas yuav tsum tau them rau graphitization ntawm cov khoom siv hlau raws li cov hauv qab no: Chromium-aluminium steels (txog 0.6%) yog siv rau lub sijhawm ntev tshaj li ntawm 525 ℃. Lub cev lub cev thiab cov yeeb nkab txuas txuas yog qhov sib txuas, nws qhov kawg zawj yog ua ntej ua tiav los ntawm lub tuam tsev tsim khoom valve. Lub taub qab vuam txoj kev ntawm lub cev channel kawg yuav tsum yog tes arc vuam, hydrogen arc vuam ntxiv rau tes arc vuam lossis lwm txoj kev vuam tsim nyog los ntawm cov txheej txheem kev soj ntsuam.
Kev sib txuas: Daim ntawv thov Scope thiab cov kev cai ntawm lub hwj chim chaw nres tsheb li qub (III)
Daim ntawv ntxiv c
(Normative Appendix)
Kev pabcuam kub siab tshaj plaws ntawm cov khoom siv plhaub bearing
C.1 Thaum xaiv cov khoom siv rau kev coj tus kheej ntawm lub plhaub, qhov kev pabcuam siab tshaj plaws yuav tsum tsis pub tshaj cov kev cai hauv Table C.1.
Table C.1 Qhov siab tshaj plaws kev pab cuam kub ntawm lub plhaub bearing khoom
C.2 Qhov siab tshaj plaws kev khiav hauj lwm kub ntawm cov kabmob ntawm lub plhaub tsis xav txog qhov tso cai qhov sib txawv thaum lub sijhawm ua haujlwm ntawm lub boiler, thiab tus nqi sib txawv yuav tsum ua raws li cov kev cai ntawm SDGJ6-1990.
C.3 Muaj peev xwm graphitization ntawm cov khoom siv hlau yuav tsum raug sau tseg hauv cov xwm txheej hauv qab no:
A) Cov pa roj carbon steel yog siv rau lub sijhawm ntev tshaj li ntawm 425 ℃.
B) Cov pa roj carbon txhuas hlau siv tau ntev txog 470 ℃.
C) Chromium-aluminium steel (muaj tsawg dua 0.6%) yog siv rau lub sijhawm ntev li ntawm 525 ℃.
C.4 Kev ceev faj yuav tsum tau them rau qhov ua tau peroxidation (oxidation ntawm daim tawv nqaij) hauv cov xwm txheej hauv qab no:
A) 1Cr-0.5Mo steel, 1.25Cr-0.5Mo steel, 2.25Cr-1Mo steel thiab 3Cr-1Mo steel saum 565 ℃;
B) 5Cr-0.5Mo steel saum 595 ℃.
Daim ntawv ntxiv D
(Informative Appendix)
Hardfacing khoom thiab hardness ntawm valve sealing nto
Table D.1 muab cov lus qhia rau cov neeg tsim qauv ntawm kev xaiv cov ntaub ntawv surfacing thiab surfacing hardness rau valve sealing nto.
Table D.1 Hardfacing khoom thiab hardfacing tsev qiv ntawv rau valve sealing nto
Cov ntawv ntxiv E
(Informative Appendix)
Butt weld groove hom valve lub cev channel kawg
E.1 Butt weld groove hom ntau yam li qub nrog pob tw yeeb nkab phab ntsa thickness δ20mm yog qhia hauv daim duab E.1
E.2 pob tw weld zawj ntawm li qub nrog cov yeeb nkab phab ntsa tuab ntawm 20mm ≤δ≤40mm yog qhia hauv daim duab e. 2
E.3 Butt weld groove hom ntawm ntau yam li qub nrog pob tw yeeb nkab phab ntsa thickness δ40mm yog qhia hauv daim duab E.3
E.4 Qhov ntev ntawm D1, D2 thiab D3 nyob rau hauv daim duab E1, daim duab E.2 thiab daim duab E.3 tsis tau muab, uas yog txiav txim los ntawm tus tsim daim duab. D1 yog sib npaug rau qhov loj me ntawm cov yeeb nkab hauv txoj kab uas hla, thiab D: tuaj yeem xam los ntawm cov qauv hauv qab no:
Hom:
Sab nraud txoj kab uas hla ntawm DW-1 piping:
A - Tus nqi ntxiv yuav tsum txiav txim siab los ntawm tus tsim qauv nrog rau cov lus E.1.
Table E.1 Ntxiv tus nqi ntawm pob tw weld zawj qhov ntev D2
E.5 Thaum qhov kev sib txuas ntawm qhov sib txuas ntawm lub cev thiab cov yeeb nkab yog qhov chaw vuam, qhov kawg zawj yuav tsum tau ua ua ntej los ntawm lub tuam tsev tsim khoom valve.
E.6 Vuam txoj kev ntawm lub pob tw welding ntawm valve lub cev channel kawg yuav tsum tau txais tes arc vuam, hydrogen arc vuam ntxiv rau tes arc vuam lossis lwm txoj kev vuam tsim nyog los ntawm kev soj ntsuam cov txheej txheem.
Lus Cim 1: Thaum Lo≥1.5δ, lub kaum sab xis tuaj yeem chamfered ntawm Lo = 1.5δ raws li qhia hauv 45 ° txoj kab nqes.
Lus Cim 2: Cov cam khwb cia steel valve lub cev zawj nrog nominal txoj kab uas hla DN≥150mm yuav tsum yog L1 = 40mm rau radiographic tshuaj xyuas, L1 = 12mm rau lwm yam
FIG. E.1 V-shaped zawj hom
Lus Cim 1: Thaum Lo≥1.5δ, lub kaum sab xis tuaj yeem chamfered ntawm Lo = 1.5δ raws li qhia hauv 45 ° txoj kab nqes.
Lus Cim 2: Cov cam khwb cia steel valve lub cev zawj nrog nominal txoj kab uas hla DN≥150mm yuav tsum yog L1 = 40mm rau radiographic tshuaj xyuas, L1 = 12mm rau lwm yam
FIG. E.2 U-shaped zawj hom
Daim duab E.3 U(1) groove type
Daim ntawv ntxiv F
(Informative Appendix)
Hlau npe
F.1 Table F.1 qhia cov ntsiab lus ntawm cov ntawv hlau hlau ntawm lub ntiaj teb li qub, kos li qub, lub rooj vag li qub, lub qhov rooj valve thiab ntsaws li qub.
Table F.1 Hlau nameplates rau lub ntiaj teb li qub, kos li qub, rooj vag li qub, throttle li qub, ntsaws li qub, thiab lwm yam
F.2 Table F.2 qhia txog cov ntsiab lus ntawm cov ntawv hlau hlau ntawm cov regulator
Table F.2 Cov ntsiab lus hlau ntawm regulator
F.3 Table F.3 qhia cov ntsiab lus ntawm kev ruaj ntseg valve hlau nameplate
Table F.3 Hlau nameplate ntawm kev ruaj ntseg valve
F.4 Table F.4 qhia txog cov ntsiab lus ntawm cov hlau nameplate ntawm lub siab txo valve
Table F.4 Hlau nameplate ntawm lub siab txo valve
F.5 Table F.5 qhia lub npe hlau ntawm qhov ntsuas kub thiab siab txo valve.
Table F.5 Hlau nameplate ntawm qhov kub thiab siab txo valve