Inconel 625 Tube rau Cov Hluav Taws Xob Hluav Taws Xob: Thermal Conductivity, Fouling, thiab Nqi ib 'meter'

Inconel 625 cevyog nickel-chromium-molybdenum alloy tube siv nyob rau hauv cov khoom siv hluav taws xob uas yuav tsum muaj sia nyob corrosive, siab - kub, lossis siab - cov txheej txheem cov kua dej uas yuav ua kom puas carbon steel los yog cov qauv stainless hlau sai sai. Vim tias nws raug nqi ntau dua ib lub 'meter' dua stainless hlau, engineers xav tau cov ntaub ntawv meej meej, -raws li cov lus teb rau ib lo lus nug: puas yog qhov kev tiv thaiv corrosion thiab fouling ua tau zoo rau tus nqi?

Phau ntawv qhia no piv Inconel 625 raj tiv thaiv stainless hlau, titanium, thiab tooj liab -nickel hla thermal conductivity, fouling resistance, thiab ntsia nqi, yog li kev yuav khoom thiab tsim engineers tuaj yeem ua pov thawj-raws li cov khoom siv.

Inconel 625 Tube yog dab tsi thiab vim li cas nws thiaj siv rau hauv cov khoom siv hluav taws xob?

Inconel 625 tube raug xaiv rau cov khoom siv hluav taws xob thaum cov txheej txheem dej corrosive, kev khiav hauj lwm kub yog siab, los yog tus tsim yuav tsum muaj ib tug hlau alloy uas resists pitting, crevice corrosion, thiab kev nyuaj siab corrosion cracking ib txhij - tej yam kev mob uas stainless hlau raj yuav ua tsis tiav ntxov.

Inconel 625 (UNS N06625) yog npib tsib xee-raws li alloy ntxiv dag zog los ntawm chromium thiab molybdenum, nrog rau cov niobium ntxiv uas tiv thaiv kev puas tsuaj thaum vuam.

Hauv kev pab cuam cua sov, cov phab ntsa yog nyias - feem ntau yog 0.9–2.1 hli - uas txhais tau hais tias txhua qhov chaw corrosion tuaj yeem perforate lub raj sai dua li nws yuav nyob rau hauv tuab - cov yeeb nkab lossis lub nkoj. Inconel 625 kev sib xyaw ua ke ntawm cov ntsiab lus siab chromium (rau oxidation thiab dav corrosion kuj) thiab molybdenum cov ntsiab lus (rau pitting thiab crevice kuj nyob rau hauv chloride-cov kabmob kua) ua rau nws yog ib qho ntawm ob peb alloys txhim khu kev qha txaus rau nyias- phab ntsa raj hauv cov kev pabcuam nruj xws li dej hiav txwv txias, flue gas acid rov qab ua haujlwm.

Inconel 625's Thermal Conductivity piv rau lwm cov khoom siv cua sov li cas?

Inconel 625 muaj cov thermal conductivity qis (kwv yees li 9.8 W / m·K ntawm chav tsev kub) dua stainless hlau (~ 16 W / m·K), titanium (~ 22 W / m·K), thiab tshwj xeeb tshaj yog tooj liab-nickel alloys (~ 40–50 W / m·K), ua rau nws cov khoom siv thermally tsawg tshaj plaws. phab ntsa-thickness- sib npaug.

Table 1 - Kwv yees li thermal conductivity ntawm cov khoom siv hluav taws xob sib hloov cov raj ntawm chav tsev kub. Qhov tseeb qhov tseem ceeb sib txawv nrog qhov kub thiab txias kev kho mob; sab laj cov ntaub ntawv cov ntaub ntawv rau kev suav tsim.

Puas yog Inconel 625's Lower Thermal Conductivity txo cov cua sov ua haujlwm?

Nyob rau hauv feem ntau ntawm cov khoom siv hluav taws xob, Inconel 625 qhov qis thermal conductivity tsuas yog cuam tshuam rau tag nrho cov cua sov hloov mus, vim hais tias cov phab ntsa phab ntsa thermal kuj feem ntau yog ib feem me me ntawm tag nrho cov kuj piv nrog cov zaj duab xis coefficients thiab fouling txheej ntawm txhua sab ntawm lub raj.

Zuag qhia tag nrho cov cua sov hloov pauv yog tswj hwm los ntawm cov lej ntawm ntau qhov kev tawm tsam hauv koob: sab hauv zaj duab xis coefficient, lub raj phab ntsa conduction tsis kam, sab nrauv zaj duab xis coefficient, thiab cov fouling deposits. Rau nyias- phab ntsa raj (hauv qab 2 hli), lub sij hawm ntawm phab ntsa conduction yog feem ntau tsuas yog 5-15% ntawm tag nrho cov thermal kuj nyob rau hauv cov kua- mus rau - ua kua. Qhov no txhais tau hais tias cov khoom siv raj nrog ib nrab ntawm cov thermal conductivity ntawm stainless hlau tsis txiav tag nrho cov cua sov hloov mus rau hauv ib nrab - nws txo nws los ntawm ib tug ntau me me, thiab feem ntau negligible, margin. Cov txiaj ntsig ntawm kev hloov mus rau Inconel 625 tau pom ntau dua hauv cov xwm txheej no:

• Cov yeeb yaj kiab nyias nyias ntawm ob sab (piv txwv li, roj- mus rau -gas exchangers), qhov twg phab ntsa tsis kam ua ib feem loj ntawm tag nrho.
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1. Thick - phab ntsa raj xaiv rau kev tiv thaiv corrosion ntxiv lossis siab - kev pabcuam siab, uas ua rau lub sijhawm ua haujlwm ntawm phab ntsa.
2. Daim ntawv thov nrog tsawg fouling, qhov twg phab ntsa kuj feem pua ​​​​nce vim fouling kuj tsis npog nws.
3. Nyob rau hauv fouling- cov kev pabcuam cuam tshuam qhov twg Inconel 625 feem ntau tau teev tseg, cov hlau alloy qhov kev tiv thaiv zoo tshaj plaws rau kev tsim cov nplai feem ntau ntau dua li offsets nws qis qis hauv nruab nrab conductivity, ua kom zoo dua kub hloov mus rau kev khiav hauj lwm phiaj los nqis tes tshaj lub fouled stainless hlau raj yuav ua tau.

Yuav Ua Li Cas Resistant Inconel 625 rau Fouling piv rau Stainless Hlau thiab Titanium?

Inconel 625 nthuav tawm fouling tsis kam sib npaug los yog zoo dua li titanium thiab zoo dua li cov qauv stainless hlau, feem ntau vim nws qhov zoo tshaj pitting thiab crevice corrosion tsis kam tiv thaiv qhov nto roughening thiab localized nres uas ua kom cov nplai thiab biofilm adhesion.

Fouling tsis yog ib qho chemistry nkaus xwb- txheej txheem ywj pheej - qhov chaw saum npoo muaj zog cuam tshuam sai npaum li cas tso nyiaj, nplai, thiab cov yeeb yaj kiab lom neeg tsim. Lub raj nplaim uas pits lossis corrodes tsim microscopic roughness thiab corrosion khoom uas ua raws li qhov chaw nucleation rau fouling ntxiv. Vim Inconel 625 tiv taus pitting, crevice corrosion, thiab nyob rau hauv - deposit corrosion zoo tshaj 316L stainless hlau, nws tuav ib tug smoother, ruaj khov nto ntau xyoo ntawm kev pab cuam, uas ntsuas slows fouling tsub zuj zuj nyob rau hauv chloride - nplua nuj los yog lom active dej ntws.

Table 2 - Kev sib piv fouling-txog kev coj tus cwj pwm ntawm cov khoom siv hluav taws xob sib txawv hauv cov tshuaj chloride-cov kev pabcuam dej.

Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias fouling uas tau tsav los ntawm cov nplais - tsim cov zaub mov (xws li calcium carbonate) lossis kev loj hlob ntawm cov kab mob lom neeg feem ntau yog tswj hwm los ntawm dej chemistry thiab kev ua haujlwm kub, tsis yog raj hlau. Inconel 625 qhov kom zoo dua yog tsom rau kev tiv thaiv corrosion - nrawm fouling, tsis nyob rau hauv kev tshem tawm cov nplai tsim los ntawm cov dej tawv.

Yuav Ua Li Cas Txiav Txim Tus Nqi Ib Meter ntawm Inconel 625 Tube?

Tus nqi ib 'meter' yog tsav los ntawm nickel thiab molybdenum raw khoom cov ntsiab lus, raj sab nraud txoj kab uas hla thiab phab ntsa thickness, raug txoj kev (seamless tiv thaiv welded), thiab tiav / xeem yuav tsum tau - nrog npib tsib xee nqi volatility yog ib tug loj tshaj plaws variable nqi tsav tsheb.

• Alloy cov ntsiab lus: Inconel 625 muaj kwv yees li 58% npib tsib xee yam tsawg kawg nkaus ntxiv rau 20-23% chromium thiab 8-10% molybdenum - tag nrho cov nqi kim dua li cov hlau tsis muaj steel hlau.
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• Tube geometry: Loj dua sab nraud txoj kab uas hla thiab cov phab ntsa tuab ncaj qha nce qhov loj ntawm cov hlau ib 'meter', scaling tus nqi kwv yees nrog tus ntoo khaub lig- ntu ntu.
• Txoj kev tsim khoom: Seamless raj yuav tsum tau ua ntau cov kauj ruam (txuas los yog extrusion, txias kos, annealing) dua welded raj, feem ntau hais kom tus nqi them nqi ntawm 15-30% rau qhov sib npaug.
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• Kev ntsuam xyuas thiab ntawv pov thawj: Lub raj xa hluav taws xob kub feem ntau yuav tsum tau kuaj tam sim no, ntsuas hydrostatic, thiab cov ntaub ntawv pov thawj tag nrho (mill test reports per ASTM B444/B704), uas ntxiv cov nqi tab sis tseem ceeb rau kev siab - ciam teb kev pabcuam.
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• Nto tiav: Ci-annealed lossis polished ID / OD tiav rau fouling- qhov kev pabcuam rhiab ntxiv tus nqi ntxiv rau zeb- cov raj tiav.
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• Kev txiav txim ntim thiab kev ua lag luam: Nickel yog pauv ntawm London Hlau Txauv thiab nws tus nqi tuaj yeem ua viav vias 20-40% hauv ib xyoos, ncaj qha tsiv mus rau Inconel 625 raj nqi ntau dua li lwm yam.
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Tus nqi Inconel 625 Tube piv rau Stainless hlau, Titanium, thiab tooj liab li cas?

Inconel 625 tube feem ntau raug nqi ntau zaus hauv ib lub 'meter' dua li 316L stainless hlau thiab feem ntau raug nqi siab dua titanium raj ntawm qhov sib npaug, ua rau nws yog qhov kev xaiv kim tshaj plaws - tus nqi uas yuav tsum tau ua raws li cov kev pab cuam ntau dua li qhov kev xaiv ua ntej.

Table 3 - Kwv yees kwv yees tus nqi ntawm ib lub 'meter' rau cov khoom siv hluav taws xob sib txawv. Qhov sib piv yog qhov qhia tau thiab sib txawv nrog qhov loj me, kev ua lag luam, thiab tus neeg muag khoom; thov cov lus hais tam sim no rau qhov project pricing.

Cov piv txwv no hloov mus rau lub sijhawm vim tias cov nqi titanium thiab npib tsib xee tsis txav mus ua ke - thaum lub sijhawm cov nqi npib tsib xee siab, tus nqi sib txawv ntawm Inconel 625 thiab titanium tuaj yeem nqaim lossis rov qab rau qee qhov ntau thiab tsawg. Cov kws kho tsheb yuav tsum kho cov piv txwv no raws li cov lus qhia kev npaj, tsis yog qhov hloov pauv rau cov khoom siv tam sim no.

Dab tsi Tube Loj thiab Phab Ntsa Thicknesses feem ntau muaj nyob rau hauv Inconel 625?

Inconel 625 heat exchanger tube feem ntau muaj los ntawm 6.35 mm (1/4 in) mus rau 50.8 mm (2 in) sab nraud txoj kab uas hla, nrog phab ntsa thicknesses li ntawm 0.71 mm (0.028 in, 22 BWG) mus rau 3.0 mm, npog qhov ntau yam xav tau rau lub plhaub -thiab{tube{11} sib pauv, thiab denum units.

Table 4 - Qhov ntau thiab tsawg thiab cov qauv rau Inconel 625 tshav kub exchanger raj.

Cov Kev Siv Hluav Taws Xob Hluav Taws Xob Cov Hluav Taws Xob Uas Tau Txais Tus Nqi ntawm Inconel 625 Tube?

Inconel 625 raj yog kev lag luam ncaj ncees thaum cov txheej txheem ntws sib txuas cov ntsiab lus chloride siab, qhov kub thiab txias, thiab qhov tshwm sim ntawm qhov tsis ua hauj lwm - cov xwm txheej nyob rau hauv uas stainless hlau raj yuav tsum tau hloov tsis tu ncua los yog muaj kev pheej hmoo ntawm kev kaw tsis tau.

1. Seawater thiab dej brackish txias nyob rau hauv offshore roj thiab roj platforms, qhov twg tube hloov yog tsis tshua muaj nqi thiab kev nkag tau yog txwv.
2. Flue gas heat recovery exchangers raug sulfuric thiab hydrochloric acid condensates los ntawm combustion gases.
3. Cov kua qaub thiab kua qaub ua cov pa roj hloov pauv tuav H2S- thiab CO2-cov kabmob ntws.
4. Cov txheej txheem tshuaj reboilers thiab condensers tuav cov tshuaj chloride- cov kua dej paug los yog oxidizing heev.
5. Nuclear thiab hluav taws xob tsim hluav taws xob hloov hluav taws xob xav tau kev tsim lub neej ntev nrog kev tshuaj xyuas tsawg tsawg.

Yuav ua li cas engineers xam tag nrho cov nqi ntawm cov tswv cuab es tsis txhob muab piv rau Upfront nqi xwb?

Kev sib piv tag nrho cov nqi ntawm cov tswv cuab (TCO) yuav tsum muaj xws li cov raj hloov zaus, cov nqi them poob qis, thiab kev tu ntau zaus dhau ntawm tus neeg hloov pauv lub neej tsim - tsis yog tus nqi pib ntawm ib 'meter' xwb - vim tias lub raj stainless hlau pheej yig dua uas ua tsis tau txhua txhua 3-5 xyoos tuaj yeem raug nqi ntau dua 20 xyoo ib zaug.

Lub neej yooj yim- lub voj voog kev sib piv lub voj voog suav nrog cov nqi hauv qab no tshaj li kev npaj ua haujlwm lub neej ntawm kev sib pauv:

1. Cov khoom pib thiab fabrication nqi ib lub raj ntim.
2. Kev cia siab rau lub neej ua haujlwm rau thawj qhov ua tsis tiav lossis tsis lees txais fouling, raws li cov ntaub ntawv ua tau zoo hauv cov kev pabcuam zoo sib xws.
3. Tus nqi ntawm kev hloov pauv lossis rov ua dua, suav nrog kev ua haujlwm, rigging, thiab pov tseg ntawm cov pob ua tsis tiav.
4. Tus nqi ntawm cov khoom lag luam tsis tau npaj tseg rau ib qho kev hloov pauv, uas nyob rau hauv cov txheej txheem txuas ntxiv cov nroj tsuag feem ntau tshaj cov nqi ntawm cov khoom siv los ntawm qhov kev txiav txim ntawm qhov loj.
5. Kev tu thiab tu ntau zaus thiab tus nqi, txij li kev ua haujlwm fouling zoo tuaj yeem txuas ntxiv lub sijhawm ntawm kev siv tshuaj lom neeg lossis tshuaj ntxuav.
6. Txo cov nyiaj tau los ntawm tag nrho cov saum toj no tshaj cov nroj tsuag txoj kev npaj lub qab ntug, los sib piv tus nqi siab dua yav tom ntej tiv thaiv kev zam rau yav tom ntej ntawm tus nqi zoo li -rau - zoo li hauv paus.

Thaum cov nqi poob qis thiab hloov zaus suav nrog, Inconel 625 feem ntau ua pov thawj tias qhov qis dua - tus nqi xaiv hauv cov kev pabcuam nruj heev, txawm tias nws tus nqi ib meter yog ob peb zaug siab dua stainless hlau. Hauv cov kev pabcuam me me, txawm li cas los xij, tus nqi ntxiv tsis tshua tau rov qab los, uas yog vim li cas xaiv cov khoom siv yuav tsum tau ua kom haum rau cov txheej txheem tiag tiag tsis yog siv los ua daim pam hloov kho.

Cov lus nug nquag

Tsis yog. Inconel 625 ua haujlwm zoo dua stainless hlau tshwj xeeb hauv chloride- nplua nuj, siab - kub, lossis cov kev pabcuam corrosive heev; nyob rau hauv cov dej me me los yog tsis yog- kev pabcuam txheej txheem corrosive, 316L stainless hlau muab kev ua haujlwm txaus ntawm ib feem ntawm tus nqi, ua rau Inconel 625 hwm tsis tsim nyog.

Tsis yog vim tias lub raj phab ntsa tsis kam yog feem ntau tsuas yog 5-15% ntawm tag nrho cov cua kub hloov mus rau hauv cov kev pab cuam ua kua, Inconel 625 qhov qis conductivity muaj qhov cuam tshuam me me rau kev ua tau zoo tag nrho, thiab nws cov fouling kuj feem ntau txhim kho cov cua kub hloov pauv piv nrog cov hlau tsis zoo hauv lub sijhawm.

Inconel 625 feem ntau yog tus nqi siab dua titanium raj ntawm qhov sib npaug, feem ntau nyob rau hauv thaj tsam ntawm 1.3-2 npaug ntawm tus nqi ntawm titanium, txawm hais tias qhov piv txwv no hloov nrog npib tsib xee thiab titanium raw khoom cov nqi lag luam thiab yuav tsum tau lees paub nrog cov khoom muag tam sim no quotes.

Tej seawater-cooled Inconel 625 tube siv 18–20 BWG (kwv yees li 1.0–1.24 mm) phab ntsa thickness, ntsuas qhov corrosion thiab mechanical zog tiv thaiv kev ua haujlwm thermal thiab cov khoom siv; kev xaiv zaum kawg yuav tsum ua raws li tus lej-raws li kev suav tsim (xws li TEMA/ASME) rau qhov tshwj xeeb siab thiab kev pabcuam.

Yog lawm, nrog rau cov txheej txheem vuam tsim nyog thiab cov hlau ua tau zoo (feem ntau ERNiCrMo-3), Inconel 625 raj tuaj yeem txuas rau cov hlau tsis muaj steel lossis carbon steel raj, txawm hais tias kev hloov pauv kev sib koom ua ke thiab cov txheej txheem sib txawv-hlau vuam yuav tsum tsim nyog raws li ASME Tshooj IX.