Thaum tshav kub kub exchangers cais li cas?
Raws li txoj kev hloov hluav taws xob, nws tuaj yeem muab faib ua: faib phab ntsa hluav taws xob hloov hluav taws xob, hloov hluav taws xob hloov hluav taws xob, cov dej sib txuas ncaj qha hluav taws xob, hluav taws xob sib txuas ncaj qha, thiab ntau lub tshuab hluav taws xob.
Raws li lub hom phiaj, nws tuaj yeem muab faib ua: rhaub, preheater, superheater thiab evaporator.
Raws li cov qauv, nws tuaj yeem muab faib ua: ntab taub hau kub exchanger, ruaj tube-daim ntawv kub exchanger, U-shaped raj-daim ntawv tshav kub exchanger, phaj kub exchanger, thiab lwm yam.
Ib qho ntawm qhov sib txawv ntawm lub plhaub thiab lub raj thiab phaj kub exchangers: qauv
1. Plhaub thiab raj kub exchanger qauv:
Lub plhaub thiab lub raj xa hluav taws xob yog tsim los ntawm lub plhaub, cov khoom siv hluav taws xob hloov hluav taws xob, cov ntawv raj, baffle (baffle) thiab lub thawv raj thiab lwm yam khoom.Lub plhaub feem ntau yog cylindrical, nrog lub raj ntim hauv, thiab ob qhov kawg ntawm lub raj ntim yog tsau rau ntawm daim ntawv raj.Muaj ob hom kua dej kub thiab dej txias hauv cov cua sov hloov, ib qho yog cov kua dej hauv lub raj, hu ua lub raj sab dej;lwm qhov yog cov kua dej sab nraud ntawm lub raj, hu ua lub plhaub sab kua.
Txhawm rau txhim kho cov cua sov hloov coefficient ntawm cov kua dej sab nraum lub raj, ob peb baffles feem ntau yog teem rau hauv lub plhaub plhaub.Lub baffle tuaj yeem ua kom cov dej nrawm nrawm ntawm lub plhaub sab, ua kom cov kua dej hla lub raj ntim ntau zaus raws li qhov kev ncua deb, thiab ua kom cov kua dej ntau ntxiv.
Cov raj xa hluav taws xob tuaj yeem muab tso rau hauv daim duab peb sab sib npaug lossis squares ntawm daim ntawv raj.Kev npaj ntawm daim duab peb sab sib npaug yog compact, qhov degree ntawm turbulence ntawm cov kua sab nraum lub raj yog siab, thiab lub tshav kub hloov coefficient yog loj.Lub xwmfab teeb tsa yooj yim ntxuav tawm ntawm lub raj thiab tsim nyog rau cov kua dej uas ua rau fouling.
1-lub plhaub;2-tub raj pob;3, 4-connector;5 - taub hau;6-tube phaj: 7-baffle: 8-drain yeeb nkab
Ib-txoj kev plhaub thiab raj kub exchanger
Schematic daim duab ntawm ib leeg-plhaub ob-tube kub exchanger
2. Phaj kub exchanger qauv:
Lub detachable phaj kub exchanger yog ua los ntawm ntau stamped corrugated nyias daim hlau nyob rau hauv tej lub sij hawm, kaw los ntawm gaskets nyob ib ncig ntawm lawv, thiab overlapped nrog thav ntawv thiab compression screws.Plaub lub kaum qhov ntawm daim hlau thiab spacers tsim cov kua distributors thiab collectors.Nyob rau tib lub sijhawm, cov kua dej txias thiab cov kua dej kub sib cais yog tsim nyog kom lawv sib cais ntawm ob sab ntawm txhua phaj.Ntws nyob rau hauv cov channel, tshav kub pauv los ntawm daim hlau.
Ib qho ntawm qhov sib txawv ntawm lub plhaub thiab lub raj kub exchangers thiab phaj kub exchangers: kev faib tawm
1. Kev faib tawm ntawm lub plhaub thiab lub raj kub exchangers:
(1) Lub raj ntawv ntawm lub raj ruaj ruaj daim ntawv kub hloov pauv yog kev sib xyaw nrog cov hlua khi ntawm ob qho kawg ntawm lub plhaub raj.Thaum qhov kub sib txawv me ntsis loj thiab lub plhaub sab siab tsis siab dhau lawm, lub nplhaib elastic compensating tuaj yeem ntsia tau rau ntawm lub plhaub kom txo tau cov thermal stress.
(2) Lub raj phaj ntawm ib kawg ntawm lub raj ntim ntawm lub taub hau lub taub hau cua sov tuaj yeem ntab tau yooj yim, tshem tawm tag nrho cov thermal kev nyuaj siab, thiab tag nrho lub raj ntim tuaj yeem rub tawm ntawm lub plhaub, uas yooj yim rau kev tu thiab tu.Floating head heat exchangers yog dav siv, tab sis lawv cov qauv yog qhov nyuaj thiab tus nqi siab.
(3) Txhua lub raj ntawm U-zoo li lub raj cua kub exchanger yog khoov rau hauv U zoo, thiab ob qhov kawg yog tsau rau tib lub raj ntawv nyob rau sab sauv thiab qis.Nrog kev pab ntawm lub raj lub thawv muab faib, nws muab faib ua ob chav: inlet thiab qhov hluav taws xob.Lub tshav kub exchanger kiag li tshem tawm thermal kev nyuaj siab, thiab nws cov qauv yog yooj yim dua li ntawm cov floating taub hau hom, tab sis lub raj sab yog tsis yooj yim los ntxuav.
(4) Lub eddy tam sim no kub zaj duab xis tshav kub exchanger txais qhov tseeb eddy tam sim no kub zaj duab xis sib hloov tshuab, thiab txhim kho lub tshav kub pauv nyhuv los ntawm kev hloov lub xeev cov lus tsa suab.Thaum qhov nruab nrab dhau los ntawm qhov chaw ntawm lub raj vortex, nws yuav muaj qhov muaj zog ntawm qhov chaw ntawm lub vortex tube, yog li kev txhim kho cov cua sov hloov mus rau 10000 W / m2.Nyob rau tib lub sijhawm, cov qauv muaj kev ua haujlwm ntawm kev tiv thaiv corrosion, kub tsis kam, siab kub tsis kam thiab tiv thaiv scaling.
2. Kev faib tawm ntawm phaj kub exchangers:
(1) Raws li qhov loj ntawm thaj chaw sib pauv cua sov hauv ib chav tsev, lub phaj kub hloov pauv yog cov khoom siv hluav taws xob sib txuas, feem ntau piv nrog lub plhaub thiab lub raj cua kub exchanger.Ib txwm plhaub thiab raj kub exchangers nyob ib cheeb tsam loj.
(2) Raws li kev siv cov txheej txheem, muaj ntau lub npe: phaj rhaub, phaj txias, phaj condenser, phaj preheater.
(3) Raws li kev sib xyaw ua ke, nws tuaj yeem muab faib ua unidirectional phaj kub exchanger thiab multi-directional phaj kub exchanger.
(4) Raws li kev khiav dej num ntawm ob lub xov xwm, nws tuaj yeem muab faib ua cov phaj sib txuas sib txuas, cov txee ntws phaj kub hloov pauv thiab hla cov phaj kub hloov pauv.Ob qho tom kawg yog siv ntau dua.
(5) Raws li qhov sib txawv ntawm qhov sib txawv ntawm cov neeg khiav dej num, nws tuaj yeem muab faib ua cov pa sib txawv ntawm cov phaj kub sib txawv thiab qhov sib txawv ntawm cov phaj kub sib txawv.
(6) Raws li kev hnav khaub ncaws corrugation, lub phaj kub exchanger muaj cov ncauj lus kom ntxaws sib txawv, uas yuav tsis rov ua dua.Thov xa mus rau: corrugated daim ntawv ntawm phaj kub exchanger.
(7) Raws li seb nws puas yog cov khoom tiav, nws tuaj yeem muab faib ua ib lub phaj kub exchanger thiab phaj kub exchanger chav tsev.
Phaj-fin heat exchanger
Ib qho ntawm qhov sib txawv ntawm lub plhaub thiab lub raj thiab phaj kub exchangers: Nta
1. Nta ntawm lub plhaub thiab lub raj kub exchanger:
(1) Kev ua haujlwm siab thiab kev txuag hluav taws xob, kev hloov pauv hluav taws xob ntawm cov khoom siv hluav taws xob yog 6000-8000W / (m2·k).
(2) Tag nrho cov hlau stainless ntau lawm, lub neej ua haujlwm ntev, mus txog 20 xyoo.
(3) Hloov cov laminar ntws mus rau turbulent flow pab txhim kho cov hluav taws xob hloov hluav taws xob thiab txo cov thermal kuj.
(4) Kev hloov pauv ceev ceev, kub tsis kam (400 degrees Celsius), siab tsis kam (2.5 MPa).
(5) Compact qauv, me me hneev taw, lub teeb yuag, yooj yim installation, txuag pej xeem siv peev.
(6) Cov qauv tsim yog hloov tau, cov lus qhia tshwj xeeb tau ua tiav, kev ua tau zoo yog qhov muaj zog, thiab cov nyiaj tau txais kev cawmdim.
(7) Nws muaj ntau hom kev thov thiab tsim nyog rau kev siab, qhov kub thiab txias ntawm ntau yam xov xwm.
(8) Tus nqi tu qis, kev ua haujlwm yooj yim, lub voj voog tu ntev thiab tu yooj yim.
(9) Txais siv nano-thermal zaj duab xis thev naus laus zis, uas tuaj yeem txhim kho qhov sib txawv ntawm cov cua sov.
(10) Siv dav hauv thermal fais fab, kev lag luam thiab mining, petrochemical, hluav taws xob hauv nroog, zaub mov thiab tshuaj, hluav taws xob hluav taws xob, tshuab thiab lub teeb kev lag luam thiab lwm yam.
(11) Lub raj tooj liab nrog cov cua txias fins dov rau sab nrauv ntawm lub tshav kub hloov raj muaj thermal conductivity thiab loj tshav kub hloov chaw.
(12) Daim ntawv qhia qhia lub plhaub-sab kua dej ntws mus tsis tu ncua nyob rau hauv cov kab tawg hauv lub tshav kub exchanger.Qhov kev ncua deb ntawm daim phiaj qhia tuaj yeem hloov kho kom zoo txaus.Cov qauv yog ruaj khov, thiab nws muaj peev xwm ua tau raws li lub tshav kub hloov ntawm lub plhaub-sab kua nrog loj txaus tus nqi los yog txawm super loj txaus tus nqi thiab siab pulsation zaus.
2. Nta ntawm phaj kub exchanger:
(1) High heat transfer coefficient
Txij li thaum sib txawv corrugated daim hlau yog thim rov qab, txoj kev nyuaj yog tsim, kom cov kua nruab nrab ntawm cov corrugated daim hlau ntws nyob rau hauv ib tug peb-dimensional swirling flow, thiab turbulent flow yuav generated ntawm ib tug tsawg Reynolds tooj (feem ntau Re = 50-200), yog li ntawd. Thaum tshav kub kub hloov pauv Cov coefficient yog qhov siab, thiab feem ntau suav tias yog xim liab yog 3-5 npaug ntawm lub plhaub-thiab-tube hom.
(2) Lub logarithmic nruab nrab kub qhov sib txawv yog qhov loj, thiab qhov sib txawv ntawm qhov kawg yog me me
Nyob rau hauv ib lub plhaub thiab lub raj cua kub exchanger, muaj ob lub kua ntws ntawm lub raj sab thiab lub raj sab.Feem ntau, lawv yog cov hla dhau thiab muaj qhov me me logarithmic txhais tau tias qhov kub thiab txias qhov sib txawv kho qhov zoo.Feem ntau cov phaj kub exchangers yog sib npaug los yog countercurrent ntws, thiab qhov kho qhov zoo yog feem ntau nyob ib ncig ntawm 0.95.Tsis tas li ntawd, cov kua dej kub thiab txias ntws hauv lub phaj kub hloov pauv yog sib npaug rau cov dej kub thiab txias hauv cov khoom siv hluav taws xob.
Qhov kub ntawm qhov chaw thiab tsis muaj bypass ua rau qhov kub thiab txias sib txawv ntawm qhov kawg ntawm lub phaj kub exchanger me me, thiab cov cua kub hloov mus rau hauv dej yuav tsawg dua 1 ° C, thaum lub plhaub thiab lub raj kub exchanger feem ntau yog 5 ° C.
(3) Me me hneev taw
Lub phaj kub exchanger muaj ib tug compact qauv, thiab lub tshav kub hloov chaw ntawm ib chav tsev ntim yog 2-5 npaug ntawm lub plhaub-thiab-tube tshav kub exchanger.Tsis zoo li lub plhaub-thiab-lub raj cua kub exchanger, nws tsis tas yuav tsum muaj qhov chaw txij nkawm rau kev rho tawm ntawm lub raj ntim.Yog li ntawd, txhawm rau ua tiav tib lub peev xwm hloov hluav taws xob, thaj chaw hauv pem teb ntawm lub phaj kub hloov pauv yog li 1/5-1/8 ntawm lub plhaub thiab lub raj kub exchanger.
(4) Nws yog ib qho yooj yim los hloov qhov chaw sib pauv cua sov lossis cov txheej txheem ua ke
Ntev npaum li ob peb daim hlau raug ntxiv lossis tshem tawm, lub hom phiaj ntawm kev nce lossis txo qhov chaw hloov cua sov tuaj yeem ua tiav.Los ntawm kev hloov lub phaj layout lossis hloov ntau hom phaj, cov txheej txheem yuav tsum tau ua ke tuaj yeem pom tau, thiab qhov chaw sib pauv cua sov ntawm lub plhaub thiab lub raj xa hluav taws xob tuaj yeem hloov kho rau cov cua sov hloov tshiab.Nws yog yuav luag tsis yooj yim sua kom nce tshav kub hloov chaw ntawm lub plhaub thiab lub raj kub exchanger.
(5) lub teeb nyhav
Lub phaj thickness ntawm lub phaj kub exchanger tsuas yog 0.4-0.8 hli, thiab lub thickness ntawm lub plhaub-thiab- raj kub exchanger yog 2.0-2.5 hli.Plhaub thiab raj kub exchangers yog hnyav dua li phaj kub exchanger thav ntawv.Phaj kub exchangers feem ntau tsuas yog suav txog li 1/5 ntawm qhov hnyav ntawm lub plhaub thiab lub raj.
(6) Tus nqi qis
Cov khoom siv ntawm lub phaj kub exchanger yog tib yam, qhov chaw sib pauv cua sov yog tib yam, thiab tus nqi yog 40% ~ 60% qis dua li ntawm lub plhaub thiab lub raj kub exchanger.
(7) Yooj yim ua
Lub tshav kub hloov pauv ntawm cov phaj kub hloov pauv tau raug stamped thiab ua tiav, uas muaj cov txheej txheem siab tshaj plaws thiab tuaj yeem ua tau ntau yam.Plhaub thiab raj kub exchangers feem ntau yog xuas tes ua.
(8) Yooj yim los ntxuav
Raws li ntev raws li lub siab bolts ntawm cov ncej phaj kub exchanger yog loosened, lub raj bundles ntawm lub phaj kub exchanger yuav loosened, thiab phaj kub exchanger yuav raug tshem tawm rau txhua yam tu.Qhov no yog qhov yooj yim heev rau cov txheej txheem kev sib hloov cua sov ntawm cov khoom siv uas yuav tsum tau ntxuav tas li.
(9) Kev poob qis me me
Nyob rau hauv lub phaj kub exchanger, tsuas yog lub plhaub phaj ntawm lub tshav kub exchanger phaj yog raug rau cov cua, lub tshav kub poob yog negligible, thiab tsis muaj kev ntsuas rwb thaiv tsev yuav tsum tau.
