Txawm hais tias nws yog kev lag luam lub teeb lossis kev lag luam hnyav, lossis kev lag luam tshuaj, phaj kub exchanger plays lub luag haujlwm tseem ceeb hauv nws. Hnub no kuv tuaj teb yog vim li cas chemical heat exchanger tuaj yeem siv phaj kub exchanger kev ua haujlwm feem ntau xaiv nws, es tsis xaiv cov kem tube kub exchanger?
Phaj cua sov exchanger muaj lub luag hauj lwm ntawm cov cua kub hloov (cua sov, preheating, txias, condensing) lub luag hauj lwm, tsuav yog cov kua - chav, kua - kua kub exchanger ntawm lub phaj kub exchanger yuav siv tau.
Phaj txias
Nyob rau hauv no mus rau "lub zog txuag" cliché lub sij hawm, tab sis kuj yog ib tug loj lub tswv yim teeb meem nyob rau hauv lub sij hawm tshiab, thiab phaj kub exchanger nyob rau hauv uas lub luag hauj lwm ua si los ntawm ib yam ntawm cov tuam txhab uas muag tsis tau ignored, vim hais tias lawv muaj feem xyuam rau cov nqi ntawm cov nyiaj tau los. teeb meem, yog li txhua tus xav kom txuag hluav taws xob thiab txo kev siv cov lag luam yuav tsum tau ua tiag tiag.
Ntau tus neeg siv tau txhawj xeeb txog cov khoom siv hluav taws xob txawv teb chaws, lawv tsis paub tias cov khoom siv hluav taws xob hauv tsev tau hloov kho rau ntau tiam neeg. Thiab txawm tias nws yog kev muag khoom ua ntej, kev muag khoom, kev muag khoom tom qab ua haujlwm zoo heev.
Hauv cov tuam txhab tshuaj feem ntau, feem ntau muaj ob hom dej-dej kub exchangers siv: ib qho yog tubular heat exchanger thiab lwm yam yog phaj kub exchanger. Yog li vim li cas kuv thiaj li pom zoo cov phaj kub exchangers? Ntxiv rau qhov kev sib piv ntawm qhov sib txawv ntawm ob hauv cov kab lus dhau los, kuv xav hais txog cov ntsiab lus hauv qab no:
1, thermal hloov coefficient:
(1) kem tube kub exchanger yog cov kua tom qab swept los ntawm lub raj phab ntsa thiab lub raj ntws ntawm lwm cov dej pauv hloov, ntsug cross-flow nrog ib leeg, nws cov cua kub hloov coefficient feem ntau yog 1000-3000w / (m. degree).
Stainless hlau phaj kub exchanger
(2) phaj kub exchanger nyob rau hauv cov dej txias sab thiab sab ntawm cov dej txias ntws sib xws turbulence. Ob lub kua dej ntws tawm mus rau qhov tsis sib xws, vim yog lub luag haujlwm ntawm corrugation los ntawm turbulent flow. Qhov no ua rau muaj kev hloov pauv ntawm cov cua sov siab, qhov siab ua haujlwm siab poob thiab qhov siab shear stress field, uas yuav ua rau tiv thaiv fouling los ntawm kev tsim ntawm tshav kub hloov chaw. Lub tshav kub hloov coefficient feem ntau yog 4000-7000 w/(m. degree ). Yog li ntawd, qhov chaw tshav kub hloov pauv ntawm lub tshav kub exchanger tuaj yeem txuag tau.
2, qhov sib txawv kawg:
(1) tubular heat exchanger tshav kub hloov qhov kawg qhov sib txawv uas cov dej txias inlet kub thiab qhov kub thiab txias qhov hluav taws xob sib txawv ntawm lub qhov hluav taws xob txias yog li 5 degree;
(2) phaj kub exchanger vim nws cov yam ntxwv yam ntxwv yuav ua tau economically tiav raws li tsawg li 1 degree qhov sib txawv.
3, dej txias:
(1) tube heat exchanger dav dav dej txias thiab qhov sib piv ntawm cov dej txias rau 1.2: 1;
(2) phaj kub exchanger vim ob lub xov xwm ntws channel yog qhov zoo ib yam thiab siab kub hloov efficiency, yog li lub phaj kub exchanger tuaj yeem txo cov dej txias, dej txias thiab dej txias piv ntawm 0 .
Ntawm chav kawm, lub phaj kub exchanger kuj muaj nws cov shortcomings, yog haum rau cov uas tsis muaj-pressure tej yam kev mob, ntau tshaj li nws muaj peev xwm-bearing muaj peev xwm tsuas xaiv lub raj hom kub exchanger.
