1. Dab tsi yog qhov zoo ntawm U- zoo li titanium raj piv rau cov raj ncaj? Cov kev khiav hauj lwm twg yog lawv haum rau?
A: Cov yam ntxwv ntawm U-tube heat exchangers yog tias txhua lub raj tuaj yeem nthuav dav thiab cog lus ywj pheej yam tsis muaj qhov sib txuas ntxiv, thiab tuaj yeem tiv taus qhov kub thiab txias sib txawv (qhov kub sib txawv ntawm lub raj sab thiab lub plhaub sab tuaj yeem ncav cuag 100 degree). Nyob rau tib lub sijhawm, lub hnab ntim lub raj tuaj yeem raug tshem tawm ntawm lub plhaub rau lub plhaub - sab tu, ua rau nws tsim nyog rau cov ntawv thov uas lub plhaub - sab nruab nrab yog fouling. Qhov tsis zoo yog tias nws yog tsis yooj yim sua rau mechanically ntxuav lub fouling hauv cov hlab; Yog li ntawd, lub raj sab nruab nrab yuav tsum huv si los yog muaj qhov tsis zoo fouling. Cov ntawv thov: lub raj sab yog corrosive siab - cov ntaub ntawv kub (xws li kub brine, dilute acid), thiab lub plhaub sab yog dej txias los yog chav.
2. titanium U- cov raj puas tuaj yeem siv rau qhov kub thiab txias? Dab tsi yog qhov ntsuas kub tshaj plaws?
A: Titanium alloys nqus oxygen ntawm qhov kub thiab txias, tsim cov txheej txheej embrittlement. Yog li ntawd, qhov tseeb ua haujlwm kub yog txwv los ntawm qhov nruab nrab thiab siab. Gr12 raug pom zoo rau kev ua haujlwm ntev - Lub sijhawm ua haujlwm tsawg dua lossis sib npaug li 300℃(dej lossis nruab nrab media), nrog luv - lub sijhawm txwv txog 350℃. Rau Cr2 muaj ntshiab titanium, qhov kub thiab txias tsawg dua los yog sib npaug rau 250℃yog pom zoo. Thaum kub siab dua, oxidation hnyav nce thiab txo cov khoom ntawm titanium yuav tsum tau xav txog; zirconium los yog nickel{11}}raws li alloys raug pom zoo.
3. Cov kav dej titanium puas xeb lossis corrode? Lawv tuaj yeem siv sijhawm ntev npaum li cas hauv dej hiav txwv?
A: Titanium hardly corrodes nyob rau hauv dej hiav txwv, ntub chlorine gas, thiab chloride daws, nrog ib tug txhua xyoo corrosion tus nqi feem ntau<0.005mm. In flowing seawater, titanium pipes can last for more than 20 years; in static seawater, there is virtually no pitting or crevice corrosion. However, it should be noted that titanium corrodes rapidly in anhydrous strong oxidants (such as fuming nitric acid), high-temperature concentrated sulfuric acid (>10%, >120 degree), hydrofluoric acid, thiab fluoride- muaj cov xov xwm; lawv siv yuav tsum zam.
4. Yuav ua li cas kom ntseeg tau qhov zoo ntawm U-zoo li tus khoov? Ntau npaum li cas yog phab ntsa thickness txo ntawm qhov khoov?
A: Peb siv txias-bending lossis kub- dabtsi yog khoov cov txheej txheem. Lub vojvoog dabtsi yog khoov feem ntau ntau dua lossis sib npaug li 2 npaug ntawm txoj kab nruab nrab ntawm cov yeeb nkab (tsawg kawg 1.5 zaug). Lub thinning tus nqi ntawm sab nraud txoj kab uas hla tom qab khoov yog tswj kom tsawg dua los yog sib npaug li 15% (raws li ASTM B338 yuav tsum), thiab tsis muaj kab nrib pleb los yog wrinkles tshwm. Txhua U- raj tau dhau lub pob- dhau qhov kev xeem (pob txoj kab uas hla 85% ~ 90% ntawm txoj kab nruab nrab ntawm lub raj) thiab kev ntsuas hydrostatic (kuaj siab 1.5 npaug ntawm qhov tsim siab) ua ntej tawm hauv lub hoobkas. Rau nyias- cov raj phab ntsa lossis me me bending radii, filling dabtsi yog khoov lossis CNC raj- cov cav tov tuaj yeem siv los xyuas kom meej.
5. Dab tsi yog qhov nyuaj hauv kev vuam titanium U- raj rau cov ntawv raj? Yuav ua li cas kom sealing?
A: Titanium muaj tshuaj lom neeg muaj zog thiab yooj yim kis los ntawm huab cua, noo noo, thiab roj thaum lub sij hawm vuam, ua rau weld embrittlement lossis tawg. Peb ua raws li cov kev ntsuas hauv qab no: Ua ntej- vuam tu ntawm cov yeeb nkab kawg thiab cov ntawv raj orifices (degreasing, pickling); Kev siv argon arc vuam, nrog kev tiv thaiv roj argon thoob plaws hauv qhov chaw vuam (pem hauv ntej + rov qab shielding); Kev tswj nruj ntawm kev sib tshuam ntawm qhov kub thiab txias, ua haujlwm sib xyaw ua ke thiab kev sib khi vuam txheej txheem thaum tsim nyog; Tom qab-weld, 100% penetrant testing thiab helium leak test yog ua (txo qis dua lossis sib npaug li 1 × 10⁻⁷ Pa·m³ / s).
6. Yuav ua li cas txiav txim siab qhov xav tau ntawm titanium U- raj specifications? Koj puas tuaj yeem muab qhov tsis yog - tus qauv customization?
A: Cov neeg siv yuav tsum tau muab cov kev txwv hauv qab no: Cov khoom siv hluav taws xob kub kub (Gr1 / Gr2 / Gr12, thiab lwm yam), sab nraud × phab ntsa thickness (feem ntau: 12 ~ 50mm × 0.5 ~ 2.5mm); Ncaj raj ntev (L), U-khoov vojvoog (R), thiab xaus protrusion; Tube pob kev npaj (piv txwv li, daim duab peb sab, kev npaj square); Tsim kub, siab, thiab nruab nrab muaj pes tsawg leeg (kom txiav txim siab haum rau titanium); Cov Qauv: National Standard GB/T3625, GB/T3624, los yog American Standard ASTM B338/B861, los yog kev faib pawg neeg ntawv pov thawj (CCS, ABS, thiab lwm yam).
Peb tuaj yeem muab tag nrho cov kev cai uas tsis yog- cov khoom lag luam, suav nrog txo cov kav dej, qhov ntev tsis sib npaug U- raj, coils, thiab lwm yam.
7. Vim li cas tus nqi ntawm titanium U- cov kav dej ntau dua li cov kav hlau stainless? Puas muaj cov kev daws teeb meem txo nqi?
A: Tus nqi ntawm titanium raw cov ntaub ntawv yog kwv yees li 5 mus rau 8 npaug ntawm 304 stainless hlau, thiab kev ua haujlwm nyuaj dua (yuav tsum tau pwm tshwj xeeb, tiv thaiv vuam, thiab qis - nrawm txias dabtsi yog khoov). Txawm li cas los xij, tag nrho cov nqi ntawm lub neej yuav tsum raug txiav txim siab: nyob rau hauv cov xwm txheej corrosive, stainless hlau kav yuav perforate thiab xau nyob rau hauv 1-2 xyoo, thaum titanium kav yuav kav ntev li 15-20 xyoo, txo kev hloov, downtime, thiab tu nqi. Yog tias pob nyiaj siv tsawg, xav txog:
Siv Gr2 hloov Gr12 (yog tias qhov nruab nrab tsis muaj corrosive heev);
Txo cov yeeb nkab phab ntsa thickness (lub zog yuav tsum tau muab xam);
Siv cov yeeb nkab titanium nkaus xwb ntawm cov yeeb nkab, thiab cov pa roj carbon steel lossis cov phaj sib xyaw ntawm lub plhaub sab.
8. Lub sij hawm xa tuaj yog dab tsi? Qhov kev txiav txim yam tsawg kawg nkaus yog dab tsi?
A: Cov qauv tshwj xeeb (piv txwv li, Φ19 × 1.2mm, Gr2, R=50mm) yog nyob rau hauv Tshuag txaus thiab tuaj yeem xa tuaj tsis pub dhau 7-10 hnub. Cov ntaub ntawv tshwj xeeb lossis cov khoom tsis zoo (piv txwv li, Gr12, txoj kab uas hla loj, cov phab ntsa nyias, me me bending vojvoog) yuav siv li ntawm 25-35 hnub. Yam tsawg kawg nkaus kom muaj nuj nqis: Kev txiav txim mus sib yuav tsawg li 20 daim (rau cov qauv lossis kev kho), kev txiav txim ntau feem ntau ntau dua lossis sib npaug rau 200 daim lossis xam los ntawm qhov hnyav.
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