I. Heat exchanger kev faib tawm:
Plhaub thiab lub raj kub exchanger tuaj yeem muab faib ua ob pawg hauv qab no raws li cov yam ntxwv ntawm cov qauv.
1. Rigid qauv ntawm lub plhaub thiab lub raj cua kub exchanger: lub tshav kub exchanger no tau dhau los ua ib lub raj ruaj khov thiab phaj hom, feem ntau tuaj yeem muab faib ua ib leeg-tube ntau thiab ntau lub raj ntawm ob hom.Nws qhov zoo yog cov qauv yooj yim thiab compact, pheej yig thiab dav siv;qhov tsis zoo yog tias lub raj tsis tuaj yeem kho tau mechanically.
2. Plhaub thiab raj kub exchanger nrog kub them nyiaj ntaus ntawv: nws muaj peev xwm ua rau lub rhuab ib feem ntawm cov dawb expansion.Cov qauv ntawm daim ntawv tuaj yeem muab faib ua:
① ntab taub hau hom hluav taws xob hloov hluav taws xob: lub tshuab hluav taws xob no tuaj yeem nthuav dav ntawm ib qho kawg ntawm lub phaj phaj, lub npe hu ua "floating head".Nws siv rau lub raj phab ntsa thiab lub plhaub phab ntsa kub qhov sib txawv yog loj, lub raj ntim qhov chaw feem ntau ntxuav.Txawm li cas los xij, nws cov qauv yog qhov nyuaj dua, kev ua haujlwm thiab cov nqi tsim khoom yog siab dua.
② U-shaped tube heat exchanger: nws tsuas muaj ib lub raj phaj, yog li lub raj tuaj yeem nthuav dav thiab cog lus thaum cua sov lossis txias.Cov qauv ntawm cov khoom siv hluav taws xob no yog qhov yooj yim, tab sis kev ua haujlwm ntawm kev tsim cov khoom khoov yog qhov loj dua, thiab vim tias lub raj yuav tsum muaj qee yam dabtsi yog khoov vojvoog, kev siv lub raj phaj tsis zoo, lub raj yog mechanically ntxuav nyuaj rau dismantle thiab hloov. cov hlab ntsha tsis yooj yim, yog li nws yuav tsum dhau los ntawm cov hlab ntsha ntawm cov kua dej huv.Cov khoom siv hluav taws xob no tuaj yeem siv rau kev hloov pauv kub, kub kub lossis kub siab.
③ packing box hom kub exchanger: nws muaj ob daim ntawv, ib tug yog nyob rau hauv lub raj phaj nyob rau hauv lub kawg ntawm txhua lub raj muaj ib tug nyias packing foob kom paub meej tias lub free expansion thiab contraction ntawm lub raj, thaum muaj pes tsawg leeg ntawm cov hlab nyob rau hauv lub tshav kub exchanger. yog heev me me, ua ntej siv cov qauv no, tab sis qhov kev ncua deb ntawm lub raj tshaj qhov dav ntawm lub tshav kub exchanger kom loj, complex qauv.Lwm daim ntawv yog ua nyob rau hauv ib kawg ntawm lub raj thiab lub plhaub ntab qauv, nyob rau hauv lub floating qhov chaw uas siv tag nrho cov packing foob, cov qauv yog yooj yim, tab sis cov qauv no tsis yooj yim rau siv nyob rau hauv cov ntaub ntawv ntawm loj txoj kab uas hla, siab siab.Stuffing box type heat exchanger tsis tshua siv tam sim no.
II.Kev tshuaj xyuas ntawm kev tsim qauv:
1. kev tsim hluav taws xob hloov hluav taws xob, tus neeg siv yuav tsum muab cov qauv tsim hauv qab no (cov txheej txheem tsis ua haujlwm):
① raj, lub plhaub qhov kev ua haujlwm siab (raws li ib qho ntawm cov xwm txheej los txiav txim seb cov khoom siv hauv chav kawm, yuav tsum tau muab)
② lub raj, lub plhaub qhov kev ua haujlwm kub (inlet / qhov hluav taws xob)
③ hlau phab ntsa kub (xws li cov txheej txheem (muab los ntawm tus neeg siv))
④ Cov khoom npe thiab cov yam ntxwv
⑤ Corrosion npoo
⑥ Tus naj npawb ntawm cov kev pab cuam
⑦ tshav kub hloov chaw
⑧ Kub exchanger raj specifications, kev npaj (daim duab peb sab los yog square)
⑨ folding phaj lossis tus naj npawb ntawm cov phaj txhawb nqa
⑩ cov khoom siv rwb thaiv tsev thiab tuab (kom txiav txim siab lub rooj zaum lub rooj zaum qhov siab)
(11) Xim.
Ⅰ.Yog hais tias tus neeg siv muaj cov kev cai tshwj xeeb, tus neeg siv los muab hom, xim
Ⅱ.Cov neeg siv tsis muaj qhov tshwj xeeb, cov neeg tsim qauv xaiv lawv tus kheej
2. Ntau yam kev tsim qauv tseem ceeb
① Kev ua haujlwm siab: raws li ib qho ntawm cov xwm txheej rau kev txiav txim siab seb cov khoom puas raug cais, nws yuav tsum tau muab.
② Cov yam ntxwv ntawm cov khoom siv: yog tias tus neeg siv tsis muab lub npe ntawm cov khoom siv yuav tsum muab cov tshuaj toxicity ntawm cov khoom.
Vim tias cov tshuaj lom ntawm qhov nruab nrab yog cuam tshuam nrog kev saib xyuas tsis zoo ntawm cov khoom siv, kev kho cua sov, qib ntawm forgings rau cov khoom siv sab saud, tab sis kuj muaj feem xyuam rau kev faib cov khoom siv:
a, GB150 10.8.2.1 (f) cov duab kos qhia tias lub thawv ntim khoom muaj kev phom sij heev lossis muaj kev phom sij heev ntawm cov tshuaj lom 100% RT.
b, 10.4.1.3 cov duab kos qhia tias cov thawv ntim khoom muaj kev phom sij heev lossis muaj kev phom sij heev rau toxicity yuav tsum tau kho tom qab vuam thaum tshav kub kub (welded pob qij txha ntawm austenitic stainless hlau yuav tsis raug kho cua sov)
c.Forgings.Kev siv cov tshuaj toxicity nruab nrab rau cov forgings heev los yog muaj kev phom sij heev yuav tsum ua kom tau raws li qhov yuav tsum tau ua ntawm Chav Kawm III lossis IV.
③ Pipe specifications:
Feem ntau siv carbon steel φ19 × 2, φ25 × 2.5, φ32 × 3, φ38 × 5
Stainless hlau φ19 × 2, φ25 × 2, φ32 × 2.5, φ38 × 2.5
Kev npaj ntawm cov cua kub exchanger raj: daim duab peb sab, kaum daim duab peb sab, square, kaum square.
★ Thaum kev tu txhua yam yuav tsum tau ua ntawm cov khoom siv hluav taws xob sib txawv, kev npaj square yuav tsum tau siv.
1. Tsim siab, tsim kub, vuam coefficient
2. Txoj kab uas hla: DN <400 lub tog raj kheej, siv cov yeeb nkab steel.
DN ≥ 400 lub tog raj kheej, siv steel phaj dov.
16" steel yeeb nkab ------ nrog cov neeg siv los tham txog kev siv steel phaj dov.
3. Daim duab layout:
Raws li qhov chaw hloov hluav taws xob, cov khoom siv hluav taws xob hloov hluav taws xob tshwj xeeb los kos cov duab kos duab los txiav txim seb muaj pes tsawg lub tshav kub hloov raj.
Yog tias tus neeg siv muab daim duab kos duab, tab sis kuj los tshuaj xyuas cov kav dej yog nyob rau hauv cov kav dej txwv lub voj voog.
★Txoj cai ntawm cov yeeb nkab tso:
(1) nyob rau hauv lub kav dej txwv lub voj voog yuav tsum muaj tag nrho cov yeeb nkab.
② tus naj npawb ntawm cov yeeb nkab ntau zaus yuav tsum sim ua kom sib npaug ntawm cov hlab ntsha.
③ Thaum tshav kub kub exchanger raj yuav tsum tau teem symmetrically.
4. Khoom siv
Thaum lub raj phaj nws tus kheej muaj lub xub pwg nyom thiab txuas nrog lub tog raj kheej (los yog lub taub hau), forging yuav tsum tau siv.Vim yog kev siv cov qauv ntawm lub raj phaj feem ntau yog siv rau siab dua, flammable, explosive, thiab toxicity rau huab, muaj kev phom sij heev, qhov xav tau ntau dua rau lub raj phaj, lub raj phaj kuj yog thicker.Txhawm rau kom tsis txhob muaj lub xub pwg nyom los tsim slag, delamination, thiab txhim kho lub xub pwg nyom fiber ntau kev ntxhov siab, txo cov nqi ntawm kev ua, txuag cov ntaub ntawv, lub xub pwg nyom thiab lub raj phaj ncaj qha forged tawm ntawm tag nrho cov forging los tsim lub raj phaj. .
5. Thaum tshav kub kub exchanger thiab raj phaj txuas
Tube nyob rau hauv lub raj phaj kev twb kev txuas, nyob rau hauv lub tsim ntawm lub plhaub thiab lub raj kub exchanger yog ib qho tseem ceeb ntawm cov qauv.Nws tsis tsuas yog ua cov khoom ua haujlwm xwb, thiab yuav tsum ua kom txhua qhov kev sib txuas hauv kev ua haujlwm ntawm cov khoom siv los xyuas kom meej tias qhov nruab nrab tsis xau thiab tiv taus lub peev xwm nruab nrab.
Kev sib txuas ntawm lub raj thiab lub raj phaj feem ntau yog peb txoj hauv qab no: kev nthuav dav;b vuam;c expansion vuam
Kev nthuav dav rau lub plhaub thiab lub raj ntawm cov xov xwm tawm yuav tsis ua rau muaj qhov tshwm sim tsis zoo ntawm qhov xwm txheej, tshwj xeeb tshaj yog rau cov khoom siv weldability tsis zoo (xws li carbon steel heat exchanger tube) thiab cov chaw tsim khoom ua haujlwm ntau dhau.
Vim qhov kev nthuav dav ntawm qhov kawg ntawm lub raj hauv vuam yas deformation, muaj qhov seem ntawm qhov kev ntxhov siab, nrog rau qhov kub thiab txias, qhov seem seem yuav maj mam ploj mus, kom qhov kawg ntawm lub raj yuav txo tau lub luag haujlwm ntawm kev sib khi thiab kev sib txuas, yog li kev nthuav dav ntawm cov qauv los ntawm kev txwv qhov siab thiab qhov kub thiab txias, feem ntau siv rau kev tsim siab ≤ 4Mpa, tsim qhov kub thiab txias ≤ 300 degrees, thiab hauv kev ua haujlwm ntawm qhov tsis muaj kev vibrations, tsis muaj qhov kub thiab txias ntau dhau thiab tsis muaj kev ntxhov siab corrosion. .
Vuam kev twb kev txuas muaj qhov zoo ntawm cov khoom siv yooj yim, kev ua haujlwm siab thiab txhim khu kev qha kev sib txuas.Los ntawm kev vuam, lub raj mus rau lub phaj phaj muaj lub luag haujlwm zoo hauv kev nce;thiab tseem tuaj yeem txo cov yeeb nkab qhov kev xav tau, txuag lub sijhawm ua haujlwm, kev saib xyuas yooj yim thiab lwm yam zoo, nws yuav tsum tau siv los ua qhov tseem ceeb.
Tsis tas li ntawd, thaum qhov nruab nrab toxicity loj heev, qhov nruab nrab thiab cov huab cua sib xyaw Yooj yim rau tawg qhov nruab nrab yog cov xov tooj cua lossis sab hauv thiab sab nraud ntawm cov yeeb nkab cov khoom sib xyaw yuav muaj qhov tsis zoo, txhawm rau xyuas kom cov pob qij txha raug kaw, tab sis kuj feem ntau siv txoj kev vuam.Vuam txoj kev, txawm hais tias qhov zoo ntawm ntau, vim hais tias nws tsis tuaj yeem zam tag nrho "crevice corrosion" thiab welded nodes ntawm kev ntxhov siab corrosion, thiab nyias cov yeeb nkab phab ntsa thiab tuab yeeb nkab phaj yog qhov nyuaj kom tau txais kev txhim khu kev qha weld ntawm.
Vuam txoj kev tuaj yeem ua rau kub siab tshaj qhov nthuav dav, tab sis nyob rau hauv qhov kev txiav txim ntawm qhov kub thiab txias cyclic kev nyuaj siab, lub vuam yog qhov cuam tshuam rau kev qaug zog tawg, lub raj thiab lub raj qhov sib txawv, thaum raug corrosive xov xwm, kom ceev cov kev puas tsuaj ntawm cov leeg.Yog li ntawd, muaj kev sib txuas thiab kev nthuav dav siv tib lub sijhawm.Qhov no tsis tsuas yog txhim kho qhov qaug zog ntawm kev sib koom ua ke, tab sis kuj txo qhov nyiam ntawm crevice corrosion, thiab yog li nws txoj kev pab cuam lub neej ntev dua li siv vuam ib leeg.
Nyob rau hauv dab tsi lub sij hawm yog tsim nyog rau kev siv ntawm vuam thiab expansion pob qij txha thiab txoj kev, tsis muaj ib tug uniform qauv.Feem ntau nyob rau hauv qhov kub thiab txias tsis dhau, tab sis lub siab yog siab heev los yog qhov nruab nrab yog yooj yim heev rau xau, kev siv lub zog expansion thiab sealing weld (sealing weld yog hais txog kev yooj yim los tiv thaiv to thiab kev siv cov vuam, thiab tsis lav. lub zog).
Thaum lub siab thiab kub siab heev, kev siv lub zog vuam thiab muab tshuaj ntxiv nthuav dav, (lub zog vuam yog txawm tias lub vuam muaj qhov nruj, tab sis kuj yuav tsum xyuas kom meej tias qhov sib koom ua ke muaj lub zog tensile loj, feem ntau yog hais txog lub zog ntawm lub zog. weld yog sib npaug rau lub zog ntawm cov yeeb nkab hauv qab axial load thaum vuam).Lub luag haujlwm ntawm kev nthuav dav yog tsuas yog txhawm rau tshem tawm crevice corrosion thiab txhim kho qhov qaug zog tiv thaiv ntawm weld.Cov qauv tshwj xeeb qhov ntev ntawm tus qauv (GB / T151) tau teev tseg, yuav tsis mus rau qhov nthuav dav ntawm no.
Rau cov yeeb nkab qhov nto roughness yuav tsum tau:
a, thaum tshav kub exchanger raj thiab raj phaj vuam kev twb kev txuas, lub raj nto roughness Ra tus nqi tsis ntau tshaj 35uM.
b, ib qho kev sib txuas ntawm lub raj kub thiab lub raj phaj expansion txuas, lub raj qhov nto roughness Ra tus nqi tsis ntau tshaj 12.5uM expansion kev twb kev txuas, lub raj qhov nto yuav tsum tsis txhob cuam tshuam qhov expansion nruj ntawm qhov tsis xws luag, xws li los ntawm longitudinal los yog kauv. qhab nias.
III.Tsim kev suav
1. Plhaub phab ntsa thickness xam (nrog rau cov yeeb nkab lub thawv luv ntu, lub taub hau, plhaub qhov kev pab cuam lub tog raj kheej phab ntsa thickness xam) yeeb nkab, plhaub qhov kev pab cuam lub tog raj kheej phab ntsa thickness yuav tsum tau raws li qhov tsawg kawg nkaus phab ntsa thickness nyob rau hauv GB151, rau carbon steel thiab tsawg alloy steel yam tsawg kawg nkaus phab ntsa thickness yog raws li mus rau qhov corrosion npoo C2 = 1 hli kev txiav txim siab rau cov ntaub ntawv ntawm C2 ntau dua 1 hli, qhov tsawg kawg nkaus phab ntsa thickness ntawm lub plhaub yuav tsum tau nce raws li.
2. Kev suav ntawm qhov qhib qhov cuab lub zog
Rau lub plhaub siv lub raj steel, nws raug nquahu kom siv tag nrho cov kev txhawb zog (nce lub tog raj kheej phab ntsa thickness los yog siv cov tuab-walled raj);rau lub thawv tuab tuab ntawm lub qhov loj los xav txog kev lag luam tag nrho.
Tsis yog lwm qhov kev txhawb nqa yuav tsum ua tau raws li qhov yuav tsum tau muaj ntawm ntau lub ntsiab lus:
① tsim siab ≤ 2.5Mpa;
② Qhov nruab nrab ntawm qhov nruab nrab ntawm ob lub qhov uas nyob ib sab yuav tsum tsis pub tsawg dua ob zaug ntawm qhov sib npaug ntawm txoj kab uas hla ntawm ob lub qhov;
③ Nominal txoj kab uas hla ntawm lub receiver ≤ 89mm;
④ siv cov phab ntsa yam tsawg kawg nkaus yuav tsum yog Table 8-1 yuav tsum tau (coj cov npoo npoo ntawm 1 hli).
3. Flange
Cov khoom siv flange siv tus qauv flange yuav tsum tau them sai sai rau lub flange thiab gasket, fasteners match, txwv tsis pub lub flange yuav tsum tau xam.Piv txwv li, hom A ca vuam flange hauv tus qauv nrog nws cov gasket txuam rau cov tsis yog xim hlau mos gasket;thaum siv winding gasket yuav tsum tau muab xam rau lub flange.
4. Cov yeeb nkab phaj
Yuav tsum tau xyuam xim rau cov teeb meem hauv qab no:
① tube phaj tsim kub: Raws li cov kev cai ntawm GB150 thiab GB / T151, yuav tsum tsis txhob tsawg tshaj li cov hlau kub ntawm cov khoom, tab sis nyob rau hauv lub xam ntawm lub raj phaj tsis tuaj yeem lav tias lub plhaub plhaub txheej txheem kev tshaj tawm, thiab hlau kub ntawm lub raj phaj yog ib qho nyuaj rau xam, nws yog feem ntau coj mus rau sab siab dua ntawm tus tsim kub rau qhov tsim kub ntawm lub raj phaj.
② multi-tube tshav kub exchanger: nyob rau hauv thaj tsam ntawm piping cheeb tsam, vim qhov yuav tsum tau teem lub spacer zawj thiab khi pas nrig qauv thiab tsis tau txais kev txhawb los ntawm tshav kub exchanger cheeb tsam Ad: GB / T151 mis.
③ Lub thickness ntawm lub raj phaj
Qhov zoo thickness ntawm lub raj phaj yog hais txog cov yeeb nkab ntau sib cais ntawm hauv qab ntawm lub bulkhead zawj thickness ntawm lub raj phaj rho tawm cov sum ntawm ob yam nram qab no.
a, yeeb nkab corrosion margin tshaj qhov tob ntawm qhov tob ntawm cov yeeb nkab ntau qhov muab faib zawj ib feem
b, plhaub qhov kev pab cuam corrosion margin thiab raj phaj nyob rau hauv lub plhaub qhov kev pab cuam sab ntawm cov qauv ntawm lub zawj qhov tob ntawm ob loj tshaj plaws nroj tsuag
5. Expansion pob qij txha teeb
Nyob rau hauv lub taag raj thiab phaj kub exchanger, vim qhov kub thiab txias sib txawv ntawm cov kua nyob rau hauv lub tube chav kawm thiab cov tub ntxhais kawm cov kua, thiab lub tshav kub exchanger thiab lub plhaub thiab lub raj phaj taag kev twb kev txuas, yog li ntawd nyob rau hauv kev siv ntawm lub xeev, lub plhaub. thiab raj expansion qhov sib txawv ntawm lub plhaub thiab lub raj, lub plhaub thiab lub raj rau axial load.Txhawm rau kom tsis txhob muaj lub plhaub thiab cov khoom siv hluav taws xob puas tsuaj, cov khoom siv hluav taws xob hloov hluav taws xob destabilization, cov hluav taws xob hloov hluav taws xob los ntawm lub raj phaj rub tawm, nws yuav tsum tau teeb tsa cov pob qij txha txuas ntxiv kom txo tau lub plhaub thiab cov cua kub exchanger axial load.
Feem ntau nyob rau hauv lub plhaub thiab kub exchanger phab ntsa kub qhov sib txawv yog loj, yuav tsum tau txiav txim siab teem lub expansion sib koom ua ke, nyob rau hauv lub raj phaj xam, raws li qhov kub thiab txias sib txawv ntawm ntau yam kev mob uas xam tau tias yog σt, σc, q, ib tug uas tsis tsim nyog. , nws yog ib qho tsim nyog yuav tsum tau ua kom cov expansion sib koom ua ke.
σt - axial kev nyuaj siab ntawm lub tshav kub exchanger raj
σc - plhaub txheej txheem lub tog raj kheej axial kev nyuaj siab
q--Lub tshav kub exchanger raj thiab raj phaj kev twb kev txuas ntawm lub rub-tawm quab yuam
IV.Tus Qauv Tsim
1. Lub thawv yeeb nkab
(1) Ntev ntawm lub thawv yeeb nkab
a.Yam tsawg kawg nkaus qhov tob
① mus rau qhov qhib ntawm ib qho yeeb nkab chav kawm ntawm lub raj lub thawv, qhov tsawg kawg nkaus qhov tob ntawm qhov chaw ntawm qhov qhib yuav tsum tsis txhob tsawg dua 1/3 ntawm lub taub sab hauv ntawm lub receiver;
② sab hauv thiab sab nraud qhov tob ntawm cov yeeb nkab chav kawm yuav tsum xyuas kom meej tias qhov tsawg kawg nkaus ntawm qhov chaw ntawm ob chav kawm tsis pub tsawg dua 1.3 npaug ntawm qhov chaw ncig ntawm lub tshav kub exchanger raj ib chav kawm;
b, qhov siab tshaj plaws hauv qhov tob
Xav txog seb nws puas yooj yim rau kev sib txuas thiab ntxuav cov khoom hauv sab hauv, tshwj xeeb tshaj yog rau cov kab uas hla ntawm qhov me me ntau lub raj cua sov.
(2) cais qhov kev faib tawm
Thickness thiab kev npaj ntawm qhov muab faib raws li GB151 Table 6 thiab daim duab 15, rau lub thickness ntau tshaj 10 hli ntawm muab faib, lub sealing nto yuav tsum tau trimmed rau 10 hli;rau lub raj cua kub exchanger, qhov muab faib yuav tsum tau teem rau ntawm lub qhov kua muag (drain qhov), ntws qhov taub yog feem ntau 6 hli.
2. Lub plhaub thiab lub raj ntim khoom
① Tube pob theem
Ⅰ, Ⅱ theem raj pob, tsuas yog rau cov pa roj carbon steel, tsis tshua muaj hlau alloy steel tshav kub exchanger raj hauv tsev qauv, tseem muaj "siab dua" thiab "qib ib txwm" tsim.Thaum lub tshav kub exchanger tube siv tau "siab dua" steel yeeb nkab, carbon steel, tsis tshua muaj alloy steel tshav kub exchanger raj pob yuav tsum tsis txhob muab faib ua Ⅰ thiab Ⅱ theem!
Ⅰ, Ⅱ tube pob ntawm qhov sib txawv yog nyob rau hauv lub tshav kub exchanger raj sab nraud txoj kab uas hla, phab ntsa thickness sib txawv, qhov sib thooj qhov loj thiab sib txawv yog txawv.
Qib Ⅰ raj pob ntawm ntau dua qhov yuav tsum tau ua, rau stainless hlau tshav kub exchanger raj, tsuas yog Ⅰ raj pob;rau feem ntau siv carbon steel tshav kub exchanger raj
② Tube phaj
a, tube qhov sib txawv
Nco ntsoov qhov sib txawv ntawm Ⅰ, Ⅱ theem tube pob
b, qhov program muab faib groove
Ⅰ qhov tob feem ntau tsis pub tsawg tshaj 4 hli
Ⅱ sub-program muab faib qhov dav: carbon steel 12 hli;stainless hlau 11mm
Ⅲ feeb ntau qhov muab faib qhov kaum chamfering feem ntau yog 45 degrees, chamfering dav b yog kwv yees li sib npaug rau lub vojvoog R ntawm kaum ntawm lub feeb ntau gasket.
③ Folding phaj
a.Cov yeeb nkab qhov loj: sib txawv los ntawm qib pob
b, hneev folding phaj notch qhov siab
Qhov siab qhov siab yuav tsum yog kom cov kua dej los ntawm qhov sib txawv nrog tus nqi ntws thoob plaws lub raj ntim zoo ib yam li qhov siab ntawm qhov siab feem ntau yog 0.20-0.45 npaug ntawm cov kab uas hla ntawm lub kaum sab xis, feem ntau txiav hauv cov yeeb nkab kab hauv qab ntawm qhov chaw. kab los yog txiav hauv ob kab ntawm cov yeeb nkab qhov nruab nrab ntawm tus choj me me (kom yooj yim rau kev hnav cov yeeb nkab).
c.Notch orientation
Ib-txoj kev ua kua dej huv, ntswj nce thiab nqis;
Cov roj uas muaj cov kua me me, nce mus rau qhov qis tshaj plaws ntawm lub phaj folding kom qhib qhov chaw nres nkoj ua kua;
Cov kua uas muaj cov roj me me, nqis mus rau qhov siab tshaj plaws ntawm lub phaj folding kom qhib qhov chaw nres nkoj qhov cua
Gas-kua coexistence los yog cov kua muaj cov khoom siv, notch sab laug thiab txoj cai, thiab qhib qhov chaw nres nkoj kua hauv qhov chaw qis tshaj.
d.Yam tsawg kawg nkaus thickness ntawm folding phaj;qhov siab tshaj plaws tsis txhawb nqa
e.Cov phaj folding ntawm ob qho kawg ntawm lub raj ntim yog ze li sai tau rau lub plhaub nkag thiab qhov hluav taws xob txais.
④ Cov hlua khi
a, txoj kab uas hla thiab tus lej ntawm cov hlua khi
Txoj kab uas hla thiab tus lej raws li Table 6-32, 6-33 xaiv, txhawm rau kom ntseeg tau tias ntau dua lossis sib npaug ntawm thaj tsam ntawm txoj hlua khi tau muab rau hauv Table 6-33 nyob rau hauv qhov chaw ntawm txoj kab uas hla thiab tus lej khi rods hloov tau, tab sis nws txoj kab uas hla yuav tsum tsis txhob tsawg tshaj li 10 hli, tus naj npawb ntawm tsis tsawg tshaj plaub
b, txoj hlua khi yuav tsum tau npaj kom zoo ib yam li qhov ua tau nyob rau sab nraud ntawm lub raj ntim, rau qhov loj ntawm txoj kab uas hla ntawm lub tshav kub exchanger, nyob rau hauv cov yeeb nkab cheeb tsam los yog ze ntawm lub folding phaj sib txawv yuav tsum tau teem nyob rau hauv ib tug tsim nyog tus naj npawb ntawm khi rods, tej folding. phaj yuav tsum tsis pub tsawg tshaj 3 lub ntsiab lus txhawb nqa
c.Tie qws txiv ntseej, qee cov neeg siv xav tau cov txiv ntoo hauv qab no thiab folding phaj vuam
⑤ Anti-flush phaj
a.Kev teeb tsa ntawm cov phaj dej los tiv thaiv yog txhawm rau txo qhov tsis sib xws ntawm cov kua dej thiab qhov yaig ntawm lub tshav kub exchanger raj kawg.
b.Txhim kho txoj kev tiv thaiv kev ntxuav tais diav
Raws li qhov ua tau ruaj khov nyob rau hauv qhov chaw ruaj khov los yog ze ntawm lub phaj phaj ntawm thawj folding phaj, thaum lub plhaub inlet nyob rau hauv cov pas nrig tsis ruaj ntawm sab ntawm lub phaj phaj, lub phaj los tiv thaiv tuaj yeem welded. mus rau lub cylinder lub cev
(6) Txhim kho cov pob qij txha expansion
a.Nyob nruab nrab ntawm ob sab ntawm lub phaj folding
Txhawm rau txo cov kua dej tsis haum ntawm kev sib koom ua ke, yog tias tsim nyog, hauv kev nthuav dav sib koom ua ke ntawm sab hauv lub raj raj, lub raj raj yuav tsum tau welded rau lub plhaub nyob rau hauv cov kev taw qhia ntawm cov kua ntws, rau ntsug kub exchangers, thaum. cov kua dej ntws mus rau pem hauv ntej, yuav tsum tau teem rau hauv qab kawg ntawm lub liner raj tso qhov qhov
b.Kev nthuav dav pob qij txha ntawm cov cuab yeej tiv thaiv kom tsis txhob muaj cov khoom siv hauv kev thauj mus los lossis kev siv rub tawm qhov tsis zoo
(vii) kev sib txuas ntawm lub raj phaj thiab lub plhaub
a.Extension ob npaug li flange
b.Cov yeeb nkab phaj tsis muaj flange (GB151 Appendix G)
3. Cov yeeb nkab flange:
① tsim kub ntau dua lossis sib npaug li 300 degrees, yuav tsum siv lub taub qab flange.
② rau lub tshav kub exchanger tsis tuaj yeem siv los tuav lub interface kom tso tawm thiab tso tawm, yuav tsum tau teem rau hauv lub raj, qhov siab tshaj plaws ntawm lub plhaub ntawm cov ntshav, qhov qis tshaj ntawm qhov chaw nres nkoj tawm, qhov tsawg kawg nkaus nominal txoj kab uas hla. ntawm 20mm.
③ Vertical heat exchanger tuaj yeem teeb tsa qhov chaw hla dhau.
4. Kev them nyiaj yug: GB151 hom raws li cov kev cai ntawm Tshooj 5.20.
5. Lwm yam khoom siv
① Lifting lugs
Qhov zoo tshaj 30Kg official lub thawv thiab cov yeeb nkab lub thawv npog yuav tsum tau teeb tsa lugs.
② sab saum toj kab
Txhawm rau kom yooj yim dismantling ntawm cov yeeb nkab lub thawv, cov yeeb nkab lub thawv npog, yuav tsum tau muab tso rau hauv lub rooj tsav xwm nom tswv, cov yeeb nkab lub thawv npog sab saum toj.
V. Kev tsim khoom, kev soj ntsuam xyuas
1. Yeeb nkab phaj
① spliced raj phaj taub qab pob qij txha rau 100% rays soj ntsuam los yog UT, tsim nyog qib: RT: Ⅱ UT: Ⅰ qib;
② Ntxiv nrog rau cov hlau tsis muaj steel, spliced yeeb nkab phaj kev ntxhov siab kho cua sov;
③ raj phaj qhov choj dav dav sib txawv: raws li cov qauv rau kev xam qhov dav ntawm lub qhov choj: B = (S - d) - D1
Qhov dav tsawg kawg nkaus ntawm lub qhov choj: B = 1/2 (S - d) + C;
2. Tube lub thawv kub kho:
Cov pa roj carbon steel, cov hlau tsis tshua muaj hlau welded nrog kev sib cais-ntau ntawm cov yeeb nkab lub thawv, nrog rau cov yeeb nkab lub thawv ntawm sab nraud qhib ntau dua 1/3 ntawm lub puab kab ntawm lub tog raj kheej yeeb nkab, hauv daim ntawv thov vuam rau kev ntxhov siab Kev kho cua sov kho, flange thiab muab faib sealing nto yuav tsum tau ua tiav tom qab kev kho cua sov.
3. Kev ntsuas siab
Thaum lub plhaub txheej txheem tsim lub siab qis dua lub raj txheej txheem siab, txhawm rau txhawm rau xyuas qhov zoo ntawm cov cua kub exchanger raj thiab raj phaj sib txuas
① Plhaub qhov kev pab cuam siab kom nce qhov kev sim siab nrog cov yeeb nkab kev pab cuam raws li kev ntsuas hydraulic, los xyuas seb cov dej xau ntawm cov yeeb nkab puas.(Txawm li cas los xij, nws yog ib qho tsim nyog los xyuas kom meej tias cov yeeb yaj kiab tseem ceeb ntawm lub plhaub thaum lub sij hawm ntsuas hydraulic yog ≤0.9ReLΦ)
② Thaum cov txheej txheem saum toj no tsis tsim nyog, lub plhaub tuaj yeem kuaj hydrostatic raws li qhov qub siab tom qab dhau, thiab tom qab ntawd lub plhaub rau kev kuaj ammonia to lossis halogen to test.
VI.Qee qhov teeb meem yuav tsum tau sau rau ntawm kab kos
1. Qhia txog qib ntawm lub raj ntim
2. Thaum tshav kub kub exchanger raj yuav tsum tau sau daim ntawv lo
3. Tube phaj piping contour kab sab nraum lub kaw tuab khoom kab
4. Sib dhos cov duab kos yuav tsum tau sau npe folding phaj sib txawv orientation
5. Txuj kev nthuav dav sib koom ua ke tso tawm qhov, tso qhov ntawm cov yeeb nkab txuas, cov yeeb nkab ntsaws yuav tsum tawm ntawm daim duab
Post lub sij hawm: Oct-11-2023