Vuam zoo tswj kev nthuav dav vuam ntawm T2 tooj liab raj thiab T2 tooj liab-steel composite daim hlau, nrog rau T2 tooj liab raj, tooj liab-steel composite daim hlau, plhaub-thiab-tube tshav kub exchangers, thiab lwm yam.
Lus Nug: Tsab ntawv piav qhia txog cov ntsiab lus tseem ceeb hauv kev nthuav dav vuam txheej txheem ntawm T2 tooj liab yeeb nkab thiab T2 tooj liab hlau sib txuas phaj. Cov kev cai tswj xyuas tseem ceeb yog npaj rau kev nthuav dav vuam kev sib txuas qauv ntawm lub raj phaj ntawm lub plhaub thiab lub raj cua kub exchangers, thiab kev tswj cov kev cai thiab kev ntsuas tau tsom mus rau lub hauv paus ntsiab lus ntawm kev sib txuas ntawm kev sib koom ua ke, kev tu ua ntej vuam, vuam qhov khoob thiab ib puag ncig cuam tshuam, thiab kho cov cuab yeej siv.
Ntsiab lus: expansion welding; T2 tooj liab raj thiab tooj liab-steel composite phaj; plhaub thiab raj kub exchanger; expansion vuam zoo tswj
ib. kev taw qhia
Ob lub ntsiab lus ntawm lub tshuab cua txias uas muaj peev xwm ua tau zoo, cov dej txias txias thiab cov dej kub hauv cov twj tso kua mis, feem ntau yog lub plhaub-thiab-lub raj cua kub exchangers. Copper heat exchangers nrog zoo thermal conductivity thiab corrosion kuj yog nyiam rau lub plhaub thiab lub raj kub exchangers nyob rau hauv lub tub yees systems. Nyob rau hauv kev lag luam tub yees, kev sib txuas ntawm cov raj tooj liab thiab cov ntawv raj raj yog cov neeg kho tshuab nthuav dav. Txawm li cas los xij, txhawm rau ua kom tau raws li qhov xav tau xws li kev tsim nkoj nkoj thiab lub zog nuclear, ob qho tib si sealing kev ua tau zoo, muaj zog vibration los yog qaug zog loads, thiab kev tiv thaiv ntawm crevice corrosion yuav tsum tau [1].
Yog li ntawd, kev nthuav dav vuam thiab cov qauv kev sib txuas yog qhov tseem ceeb ntawm kev sib txuas ntawm cov kav dej thiab cov ntawv raj. Kab lus no feem ntau piav qhia txog kev nthuav dav vuam kev sib txuas ntawm cov ntawv sib txuas thiab T2 cov kav dej: nthuav dav vuam ntawm T2 cov kav dej thiab T2+ cov ntawv hlau sib xyaw. Kev sib txuas ntawm cov kav dej tooj liab thiab cov ntawv sib txuas ua ke siv cov txheej txheem vuam ua ntej thiab tom qab ntawd nthuav dav. Nws nthuav dav vuam qauv yog qhia hauv daim duab 1 hauv qab no. Txhawm rau kom tau txais kev nthuav dav vuam zoo sib koom ua ke thiab ua kom muaj kev ua haujlwm zoo ntawm lub tshuab cua txias, cov txheej txheem txuas ntxiv ntawm cov yeeb nkab tooj liab yuav tsum tau tswj nruj me ntsis. Cov hauv qab no yog ib qho kev qhia txog cov ntsiab lus tseem ceeb ntawm kev tsis siv neeg mem tes argon fluorine vuam expansion vuam txheej txheem rau kev siv los ntawm cov phooj ywg.
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1. Kev tswj kom huv si ua ntej vuam
Kev ntxuav ua ntej welding: Thaum lub tshav kub exchanger raj thiab cov ntawv raj yog welded, ntxuav ua ntej vuam yog ib qho tseem ceeb heev. Thaum lub sij hawm vuam, nws pom tau hais tias ib zaug muaj xeb, roj, noo noo los yog lwm yam av nyob rau hauv lub raj los xij, nws yog ib qho yooj yim mus tsim subcutaneous pores. feem ntau
Lub stomata muaj qhov qhib loj thiab qhov tob tob, ua rau kev kho nyuaj. Countermeasures: Ua ntej welding, daim ntawv raj tuaj yeem degreased thiab ntxuav kom tshem tawm cov roj thiab impurities. Tom qab ntxuav, tshuab nrog compressed cua thiab so nrog dawb tsis-woven daim ntaub. Yog tias daim ntaub dawb tsis hloov xim, nws tsim nyog.
2.Welding qhov sib txawv tswj
T2 tooj liab muaj zoo thermal conductivity thiab thermal conductivity. Thaum 20 degree, thermal conductivity thiab thermal conductivity yog 7 npaug ntawm hlau. Thaum 1000 degree, thermal conductivity thiab thermal conductivity yog 11 npaug ntawm hlau. Txawm li cas los xij, vim nws cov thermal conductivity siab, yog tias cov txheej txheem vuam tooj liab zoo ib yam li cov hlau me me, cov cua sov yuav tawm ntawm qhov chaw sov sai sai. Qhov sib txawv loj dua ua rau cov hlau hauv lub pas dej molten muaj kev cuam tshuam rau kev tawg thaum lub sij hawm crystallization, tsis muaj melting, thiab qis permeability. Nyob rau tib lub sijhawm, nws kuj tseem tuaj yeem ua rau oxidation ntawm cov khoom siv hauv lub hauv ntej-kawg nthuav dav thiab cuam tshuam rau qhov zoo ntawm kev nthuav dav. Yog li ntawd, lub tshav kub exchanger raj phaj txais ib tug sealing qauv ntawm vuam + lub zog expansion, thiab kev tswj ntawm vuam sib txawv yog ib qho tseem ceeb heev.
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Countermeasures: Siv sticking expansion los txo los yog tshem tawm qhov sib txawv ntawm cov yeeb nkab thiab lub raj ntawv, kho qhov ntev ntawm lub raj expander, thiab ua kom lub thickness ntawm lub raj ntawv ntawm cov tsis-welded nto los ntawm 3 hli, thiab tswj lub thinning npaum li cas. kwv yees li 2%, uas yog txhawm rau tiv thaiv cov yeeb nkab expansion lubricating roj los ntawm kev paug cov yeeb nkab qhov thaum lub sij hawm expansion txheej txheem, siv non-viscous expansion joint volatile roj rau expansion.
3. Welding ib puag ncig
Cov cuab yeej hloov kho, roj ntws, tungsten koob sib tsoo, thiab lwm yam los tswj cov cua ceev ntawm qhov chaw vuam yog siab dhau lawm, cov roj tiv thaiv yuav poob thaum lub vuam txheej txheem, yog li txo qhov ntws ntawm cov roj tiv thaiv, ua rau arc tsis ruaj khov, yooj yim sib tov nrog huab cua thiab poob cov nyhuv tiv thaiv, uas ua rau lub nto ntawm lub weld yuav dub los yog poob nws cov xim hlau luster. Qee lub sij hawm cov tungsten electrode yuav raug hlawv, cuam tshuam rau cov vuam ib txwm. Nyob rau hauv tib txoj kev welding, kho thiab hloov lub kaum sab xis ntawm tungsten koob, los yog tso cov roj yam tsis muaj kev tiv thaiv roj, yuav txaws cov hlau ntawm lub pas dej ua ke thaum tawg, thiab cov tungsten electrode yuav hlawv, yog li cuam tshuam rau vuam. Txawm li cas los xij, yog tias tus nqi ntws ntawm cov roj tiv thaiv loj dhau lawm, qhov cuam tshuam ntawm cov pa hluav taws xob cuam tshuam yuav cuam tshuam rau kev khiav ntawm huab cua tiv thaiv, thiab cov roj tiv thaiv tsis tuaj yeem tsim cov laminar ntws, yog li kev tiv thaiv zoo tsis tuaj yeem tau txais. . Yog li ntawd, qhov vuam ib puag ncig, roj ntws thiab kev hloov kho cov cuab yeej yog qhov tseem ceeb heev thiab yuav tsum tau tswj nruj me ntsis. Cov hauv qab no yog ib co empirical tsis tau nyob rau hauv ntau lawm rau siv los ntawm cov phooj ywg.
3.1 Welding ib puag ncig
(1) Cov cua ceev hauv qhov chaw vuam yog tsawg dua 1m / s.
(2) Cov kiv cua tsis raug tso cai los tshuab rau hauv qhov chaw vuam. Yog tias koj xav tias cua los yog muaj qhov hws hauv qhov vuam, koj yuav tsum tsis txhob siv vuam thiab nrhiav qhov ua rau.
3.2 Kho khoom siv
(1) Kho txoj hauj lwm ntawm tungsten electrode ntawm vuam phom kom lub vuam arc nyob rau ntawm qhov sib txuas ntawm lub phaj phaj thiab lub raj cua sov.
(2) Yog tias cov tungsten electrode raug hlawv, nws yuav tsum tau hloov raws sijhawm.
3.3 Kev tiv thaiv roj hloov
(1) Lub vuam shielding gas flow meter yuav tsum yog vertically upward.
(2) Thaum lub siab tiv thaiv roj tsawg dua 1.0MPa, nws yuav tsum tau hloov tam sim ntawd.
3.4 Tungsten koob sib tsoo thiab hloov
Thaum sib tsoo tungsten electrodes, cov qauv sib tsoo yuav tsum tsis txhob siv rau hauv cov duab kauv thiab yuav tsum tau raws li cov kev taw qhia ntawm lub busbar; qhov sib tsoo lub kaum sab xis yuav tsum tau hloov raws li qhov loj ntawm qhov vuam tam sim no; lub taub ntawm lub tungsten electrode yuav tsum yog hauv av mus rau ib txoj kab uas hla d raws li qhov loj ntawm qhov vuam tam sim no. 0 2-0.8 platform. Tungsten rab koob sib tsoo yuav tsum tau hais tias thaum lub hau ntawm tungsten koob raug hlawv thiab muaj cov hlau seem, nws yuav tsum tau hloov lub sijhawm. Thaum lub sij hawm vuam txheej txheem, qhov xwm txheej ntawm tungsten koob yuav tsum tau soj ntsuam. Thaum welding mus txog 5 lub raj qhov, nws yuav tsum tau soj ntsuam ib zaug.
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4. Kev nthuav dav vuam ib ntus
Yog tias qhov kev sib txuas ntawm lub raj xa hluav taws xob thiab cov ntawv raj siv cov qauv kev nthuav dav, qhov sib txuas ntawm kev nthuav dav vuam yuav muaj kev cuam tshuam zoo rau cov vuam zoo. Kev paub qhia tau hais tias qhov chaw vuam qhov kub thiab txias cuam tshuam rau thaj chaw nthuav dav thaum thawj zaug nthuav dav thiab tom qab ntawd vuam. Raws li kev nqis tes ua, nws yuav ua rau thaj chaw nthuav dav kom so. Raws li lub teb chaws tus qauv 151-1999 "Plhaub thiab Tube Thaum tshav kub kub Exchanger", 15 hli tsis-expansion cheeb tsam yog tseg los txo qhov cuam tshuam ntawm vuam thiab nthuav. Txawm li cas los xij, txij li qhov vuam raug kaw ntawm 15 hli, cov plua plav thiab roj hauv qhov chaw no yuav nthuav dav sai tom qab cua sov, thiab tsis muaj txoj hauv kev tawm mus. Yog li ntawd, thaum huab cua siab mus txog ib qho kev txwv, nws yuav tawg tawm mus rau hauv lub pas dej molten. Qhov no tsim ib lub qhov nyob rau hauv lub weld, thiab vim tsis muaj lub siab, ib co residue tseem nyob rau hauv weld, tsim ib tug subcutaneous qhov [2]. Thaum lub sij hawm tawg, cov hlau nyob rau hauv lub vuam pas dej ua ke feem ntau splashes, ua rau cov tungsten electrode hlawv tawm thiab cuam tshuam rau vuam. Ntawm qhov tsis sib xws, yog tias koj weld ua ntej thiab tom qab ntawd nthuav dav, qhov ua tau ntawm qhov tshwm sim saum toj no tshwm sim yog tsawg heev. Raws li kev txheeb cais, tus qub yog 40-60 lub sij hawm yuav muaj pores dua li yav tas los. Tsis tas li ntawd, qhov kev ntxhov siab ntawm cov kav dej uas nthuav dav ua ntej thiab tom qab ntawd welded yog qhov nyuaj dua tom qab vuam, tab sis thaum nthuav dav ua ntej vuam, qhov vuam kev nyuaj siab kuj tseem ruaj khov. Txhawm rau kom ntseeg tau tias tag nrho cov khoom siv hluav taws xob zoo, txawm tias txiav txim siab txo qhov porosity ntawm qhov vuam thiab lub xeev kev ntxhov siab ntawm kev sib koom ua ke, kev nthuav dav vuam thiab vuam ntawm cov kav dej thiab cov kav dej yuav tsum tau ua ua ntej.
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6. Lub hauv paus ntsiab lus ntawm kev nthuav dav sib koom ua ke ntawm lub raj tooj liab thiab lub raj phaj
Tom qab lub raj tooj liab thiab lub raj phaj tau nthuav dav, lub raj tooj liab tau dhau los ua cov yas deformation, lub phaj phaj qhov ua rau me ntsis rebound, thiab residual kev ntxhov siab ntawm qhov chaw sib cuag yog tsim nyob rau hauv kev sib koom ua ke ntawm lub raj tooj liab thiab lub puab phab ntsa ntawm lub raj. qhov. Lub expansion sib koom ua ke ncaj qha cuam tshuam rau kev siv thiab lub neej ntawm lub nruab nrab cua txias chav tsev. Qhov kev nthuav dav zoo ntev txiav txim siab lub zog rub tawm, uas qhia ncaj qha rau nws lub peev xwm los tiv thaiv qhov kub thiab txias qhov sib txawv ntawm qhov sib txawv. Lub degree ntawm haum ntawm nws qhov chaw sib cuag ncaj qha txiav txim siab nws sealing kev ua tau zoo [3]. Kev nthuav dav ntev tau piav qhia hauv kab lus no yog nyob ntawm qhov tuab ntawm lub raj phaj. Lub thickness ntawm lub raj phaj yog txo los ntawm 3 hli ntawm ob qhov kawg. Kev kho ntawm lub raj expander. Vim tias lub hauv ntej kawg ntawm lub raj xa ntawv tau raug welded, lub vuam yuav raug nyem los ntawm kev quab yuam sab nraud, uas yuav ua rau lub vuam tawg thiab cuam tshuam rau qhov zoo ntawm qhov vuam. Nyob rau tib lub sijhawm, lub vuam yog qhov tsis sib xws thiab tsis sib xws, uas yuav cuam tshuam rau qhov sib xws ntawm lub zog ntawm tag nrho qhov chaw nthuav dav thaum lub sijhawm nthuav dav. Yog li ntawd, thaum lub sij hawm expansion Lub pem hauv ntej kawg yog txo los ntawm 3 hli xwb kom tsis txhob vuam seam. Koj tuaj yeem siv cov yeeb nkab txuas txuas ntxiv los nthuav qhov sib koom ua ke. Lub rear kawg ntawm lub raj phaj yog txo los ntawm 3 hli kom tsis txhob over-expansion. Qhov kawg ntawm lub raj lub qhov yog tangent rau cov yeeb nkab tooj liab thiab ua rau cov yeeb nkab tooj liab puas.
7. Cov lus xaus
Kev xyaum ntau lawm tau ua pov thawj tias T2 tooj liab raj thiab T2 tooj liab hlau sib txuas daim hlau yog welded siv tungsten argon-helium sib xyaw roj shielded vuam. Pre-welding cleanliness thiab vuam sib txawv tswj yog cov txheej txheem tseem ceeb rau cov cua kub exchanger raj thiab raj phaj vuam. , lawv ncaj qha cuam tshuam rau vuam zoo. Qhov chaw vuam, kev kho cov cuab yeej siv, cov roj ntws, thiab tungsten rab koob sib tsoo yog qhov cuam tshuam ncaj qha rau cov vuam. Yog tias tsis muaj kev hloov kho raws sijhawm thiab kev tshuaj xyuas qhov chaw, cov txheej txheem vuam yuav ua rau cov khoom siv vuam txawv txav, thiab tseem ua rau lub vuam tsis tuaj yeem kho thiab lub tsev yuav raug muab pov tseg, ua rau muaj kev cuam tshuam loj heev. Kev poob nyiaj txiag. Rau kev nthuav dav thiab vuam cov khoom siv hluav taws xob sib txuas, qhov sib txuas ntawm kev nthuav dav thiab vuam muaj qhov cuam tshuam loj rau qhov zoo ntawm cov khoom sib txuas. Tom qab-weld expansion tsis tsuas yog txo qhov tshwm sim ntawm vuam tsis xws luag, tab sis kuj xyuas kom meej tias cov welded ob leeg muaj kev ntxhov siab zoo faib [4]. Siv cov txheej txheem tswj thiab cov txheej txheem ntsuas tau npaj tseg hauv tsab xov xwm no, qhov zoo ntawm kev nthuav dav welded qauv hluav taws xob tuaj yeem lav tau thiab kev nyab xeeb thiab kev siv mus sij hawm ntev ntawm lub plhaub-thiab-lub raj cua kub exchanger tuaj yeem ua tau raws li.
