Kub Ex-changer
Heat Exchangers yog dab tsi?
Lo lus "heat exchanger" yog siv los piav txog ib lub cuab yeej uas pab hloov cov cua sov ntawm ib qho dej mus rau lwm qhov yam tsis muaj qhov sib tov. Nws muaj ob txoj kev sib txawv los yog txoj hauv kev, ib qho rau cov kua dej kub thiab ib qho rau cov kua dej txias, uas nyob sib cais thaum sib pauv cua sov. Lub luag haujlwm tseem ceeb ntawm lub tshuab hluav taws xob hluav taws xob yog txhawm rau txhim kho kev siv hluav taws xob los ntawm kev siv hluav taws xob pov tseg, txuag cov peev txheej, thiab txo cov nqi ua haujlwm.
Hom Kev Kub Kub Exchangers
Plhaub thiab raj kub exchangers:Cov no yog cov khoom siv hluav taws xob ntau tshaj plaws siv hauv kev lag luam HVAC. Lawv muaj xws li ib tug series ntawm raj nyob rau hauv ib lub plhaub. Cov kua dej kub ntws los ntawm cov hlab ntsha thaum cov kua dej txias ncig cov hlab hauv lub plhaub, tso cai rau kev sib pauv cua sov kom zoo.
Phaj kub exchangers:Phaj kub exchangers siv ib pawg ntawm cov hlau phaj nrog alternating tsa thiab nyuaj siab. Cov kua dej kub thiab txias ntws los ntawm cov kab sib cais tsim los ntawm qhov sib txawv ntawm cov phiaj xwm, ua kom cov cua sov ua kom siab tshaj plaws vim qhov loj ntawm qhov chaw.
Cua-to-air heat exchangers:Kuj hu ua cua sov rov qab units, cov cua kub exchangers hloov tshav kub ntawm cov extract thiab muab cov cua ntws. Lawv tshem tawm cov cua sov los ntawm cov huab cua stale thiab hloov mus rau huab cua ntshiab, txo kev siv hluav taws xob los ntawm pre-conditioning cov cua tuaj.
Dab tsi yog Kev Siv Hluav Taws Xob ntawm Plhaub thiab Tube Thaum tshav kub kub Exchanger?
Kev lag luam siv lub plhaub thiab lub raj kub exchangers, siv nyob rau hauv cov tshuaj, khoom noj khoom haus, roj thiab roj thiab lwm yam teb, yog dav. Lawv feem ntau ua haujlwm nyob rau hauv ntau yam kev lag luam rau kev hloov cov cua sov ntawm ob lub kua dej yam tsis muaj kev sib cuag ncaj qha. Qee qhov kev lag luam tseem ceeb ntawm lub plhaub thiab lub raj cua kub exchangers daim ntawv thov suav nrog:
Cov txheej txheem cua sov thiab cua txias hauv cov nroj tsuag tshuaj
Condensing thiab evaporating luag hauj lwm nyob rau hauv refineries
Thaum tshav kub kub rov qab systems nyob rau hauv lub hwj chim tsim chaw
HVAC systems hauv kev lag luam thiab tsev nyob
Cov tub yees tshuab hauv cov chaw ua zaub mov
Thermal tswj hauv cov chaw tsim khoom roj thiab roj
Zuag qhia tag nrho, lub plhaub thiab lub raj cua kub exchangers ua lub luag haujlwm tseem ceeb hauv kev ua kom zoo thermal efficiency thiab tswj qhov kub thiab txias ntawm ntau yam txheej txheem kev lag luam.
Muaj pes tsawg hom Plhaub thiab Tube Thaum tshav kub kub Exchanger?
Qhov tseem ceeb, muaj peb yam tseem ceeb ntawm lub plhaub thiab lub raj cua kub exchangers uas feem ntau siv:
1. Tsau Tube Sheet Exchanger (L, M, thiab N Hom Tsheb Tsheb)
Hauv qhov kev tsim no, cov ntawv raj yog welded rau lub plhaub, uas ua rau kev tsim kho yooj yim thiab kev lag luam. Thaum lub raj bores tuaj yeem raug ntxuav los yog tshuaj lom neeg, qhov chaw sab nraud ntawm cov raj feem ntau siv tsis tau tsuas yog siv tshuaj ntxuav. Expansion bellows tej zaum yuav tsim nyog kom haum raws li qhov kub thiab txias sib txawv ntawm lub plhaub thiab cov khoom siv raj, tab sis lawv tuaj yeem ua rau qhov tsis muaj zog thiab tsis ua haujlwm.
2. U-Tube Exchangers
Hauv U-Tube exchanger, hom header pem hauv ntej yuav txawv, thiab lub header rear feem ntau yog M-Type. U-tubes tso cai rau kev nthuav dav tsis muaj kev txwv, thiab lub hnab ntim cov raj tuaj yeem raug tshem tawm los ntxuav. Txawm li cas los xij, kev tu sab hauv ntawm cov raj los ntawm kev siv tshuab yog qhov nyuaj, ua rau hom no tsuas yog siv rau cov ntaub ntawv uas lub raj sab dej huv si.
3. Floating Head Exchanger (P, S, T, thiab W Hom Rov Qab Headers)
Nyob rau hauv hom exchanger no, lub tubesheet ntawm lub rear header kawg tsis welded rau lub plhaub tab sis tso cai rau txav los yog ntab. Tubesheet nyob rau hauv pem hauv ntej header kawg yog ntawm ib txoj kab uas hla loj dua lub plhaub thiab yog kaw zoo ib yam li lub taag tubesheet tsim.
Thermal expansion tuaj yeem nyob tau, thiab lub hnab ntim lub raj tuaj yeem raug tshem tawm los ntxuav. S-Type rear Header yog qhov kev xaiv nrov tshaj plaws rau lub taub hau nram qab. Floating head exchangers yog haum rau qhov kub thiab txias, tab sis feem ntau kim dua piv rau cov tubesheet exchangers ruaj.
Raws li tus kws tshaj lij cov yeeb nkab xa khoom, Hnssd.com tuaj yeem muab Cov Hluav Taws Xob Hluav Taws Xob Customized. Yog tias koj xav tau cov ntaub ntawv ntxiv txog peb cov khoom, peb ua siab zoo thov koj hu rau peb:sales@hnssd.com
Cov khoom ntawm lub plhaub thiab lub raj cua kub exchanger tuaj yeem tawg mus rau hauv cov hauv qab no:
1. Plhaub
Lub plhaub yog lub tshav kub exchanger sab nraud uas tuav lub raj ntim. Nws feem ntau yog lub thawv cylindrical tsim los ntawm cov hlau lossis lwm yam khoom tsim nyog
2. Tube lossis Tube Bundle
Ib qho kev sib sau ua ke ntawm cov raj sib txuas khiav raws qhov ntev ntawm lub plhaub ua rau lub raj ntim. Raws li kev siv tshwj xeeb, cov raj tuaj yeem tsim los ntawm cov khoom sib txawv, xws li stainless hlau, tooj liab, lossis titanium. Txoj kab uas hla thiab thickness ntawm cov raj kuj tseem ceeb tsim tsis.
3. Tube ntawv
Tube nplooj ntawv yog cov ntawv ruaj khov uas ua raws li qhov thaiv ntawm lub raj ntim thiab lub plhaub. Lawv feem ntau yog tsim los ntawm cov hlau thiab fused rau lub plhaub kom ntseeg tau tias muaj kev ruaj khov thiab tsis muaj paug. Cov hlab yog ntxig los ntawm qhov hauv cov ntawv raj thiab yog nthuav los yog welded nyob rau hauv txoj hauj lwm.
4. Baffles
Baffles yog daim hlau los yog rods uas muab tso rau hauv lub plhaub los tswj kev txav ntawm cov dej nyob ib ncig ntawm lub raj ntim. Cov no tuaj yeem yog longitudinal lossis transverse nyob rau hauv orientation thiab yog npaj los txhim kho kev ua tau zoo ntawm kev hloov hluav taws xob.
5. Inlet thiab Outlet Nozzles
Lub inlet thiab qhov hluav taws xob nozzles ua haujlwm raws li cov ntsiab lus nkag thiab tawm rau cov kua hauv cov khoom siv hluav taws xob. Cov kev sib txuas no feem ntau yog muab tso rau ntawm qhov kawg ntawm lub plhaub thiab txuas rau cov hlab thiab lub plhaub siv flanges lossis lwm hom fittings.
6. Kev nthuav dav sib txuas
Expansion pob qij txha yog hloov tau yooj yim connectors uas haum rau lub raj nras lub thermal expansion thiab contraction. Feem ntau nyob rau ntawm qhov nkag thiab qhov hluav taws xob ntawm lub tshav kub exchanger, cov pob qij txha yog tsim los ntawm cov hlau bellows los yog lwm yam ntaub ntawv hloov tau yooj yim.
7. Txhawb Cov Qauv
Cov qauv kev txhawb nqa tuav cov khoom sib hloov cua sov hauv txoj haujlwm, ua kom lub hauv paus ruaj khov. Cov qauv kev txhawb nqa tuaj yeem yog ib ntus lossis ruaj khov thiab tuaj yeem ua los ntawm cov hlau lossis lwm yam khoom siv.
Plhaub thiab tube geometric terminology
1 | Chaw Nres Tsheb (Pem Hauv Ntej) Lub Taub Hau—Channel | 20 | Slip-on Backing Flange |
2 | Chaw Nres Tsheb (Pem Hauv Ntej) Lub Taub Hau-Bonnet | 21 | Floating Tubesheet Skirt |
3 | Nyob ruaj ruaj (Pem hauv ntej) Lub taub hau Flange | 22 | Floating Tubesheet Skirt |
4 | Channel Cover | 23 | Ntim Box Flange |
5 | Chaw Nres Tsheb Nozzle | 24 | Ntim |
6 | Daim Ntawv Thov Tube | 25 | Packing Follower Nplhaib |
7 | Cov raj | 26 | Lub nplhaib |
8 | Plhaub | 27 | Tie Rods thiab Spacers |
9 | Plhaub Cover | 28 | Transverse Baffles los yog Cov Ntawv Txhawb Nqa |
10 | Plhaub Flange-Stationary Head End | 29 | Impingement Baffle los yog phaj |
11 | Plhaub Flange-Rear Head End | 30 | Longitudinal Baffle |
12 | Plhaub Nozzle | 31 | Pass Partition |
13 | Plhaub Npog Flange | 32 | Qhov kev sib txuas |
14 | Expansion Joint | 33 | Kev sib txuas dej |
15 | Floating Tubesheet | 34 | Kev Sib Txuas Lus |
16 | Floating Head Cover | 35 | Txhawb Saddle |
17 | Floating taub hau Flange | 36 | Lifting Lub |
18 | Floating Head Backing Device | 37 | Txhawb Bracket |
19 | Split Shear Nplhaib |
Tube diam layout thiab suab
Cov raj yuav muaj qhov ntev ntawm 12.7 hli (0.5 nti) txog 50.8 hli (2 nti), tab sis 19.05 hli (0.75 hauv) thiab 25.4 hli (1 hauv) yog qhov ntau thiab tsawg. Cov hlab yog nteg tawm nyob rau hauv daim duab peb sab los yog square qauv nyob rau hauv lub raj los xij.
Cov square layouts yuav tsum tau nyob qhov twg nws yog ib qho tsim nyog kom tau txais ntawm lub raj nplaim rau kev kho tshuab. Qhov kev teeb tsa daim duab peb sab tso cai rau cov raj ntau hauv ib qho chaw. Lub raj suab yog qhov luv tshaj nruab nrab-rau-nruab nrab ntawm cov hlab. Lub raj sib nrug yog muab los ntawm lub raj pitch / raj txoj kab uas hla, uas feem ntau yog 1.25 lossis 1.33. Txij li cov square layout yog siv los ntxuav lub hom phiaj, qhov sib txawv yam tsawg kawg nkaus ntawm 6.35 hli (0.25 nyob rau hauv) raug tso cai ntawm cov hlab.
Baffle hom
Baffles tau nruab rau ntawm lub plhaub sab kom muab cov cua kub hloov pauv ntau dua vim muaj kev kub ntxhov ntau ntxiv thiab txhawb nqa cov raj yog li txo qhov kev puas tsuaj vim kev co. Muaj ntau hom baffle sib txawv, uas txhawb nqa cov hlab thiab txhawb kev ntws hla cov hlab.
Ib Segmental (qhov no yog qhov feem ntau),
Muab ob npaug rau Segmental (qhov no yog siv kom tau txais lub plhaub qis qis thiab siab poob),
Disc thiab Doughnut.
Qhov nruab nrab-rau-nruab nrab ntawm baffles yog hu ua baffle-pitch thiab qhov no tuaj yeem hloov kho kom sib txawv ntawm qhov sib txawv ntawm qhov sib txawv. Hauv kev xyaum, baffle pitch tsis yog ib txwm ntau dua li qhov sib npaug ntawm qhov sib npaug ntawm sab hauv ntawm lub plhaub lossis ze dua li qhov sib npaug ntawm ib feem tsib ntawm txoj kab uas hla lossis 50.8 hli (2 hauv) qhov twg ntau dua. Txhawm rau kom cov kua dej ntws rov qab mus rau pem hauv ntej hla cov hlab ib feem ntawm cov baffle raug txiav tawm. Qhov siab ntawm qhov no yog hu ua baffle-txiav thiab ntsuas raws li feem pua ntawm lub plhaub txoj kab uas hla, piv txwv li, 25 ib xees baffle-txiav. Qhov loj ntawm baffle-cut (los yog baffle qhov rais) yuav tsum tau txiav txim siab nrog rau lub suab baffle. Nws yog ib txwm ua kom loj qhov baffle-txiav thiab baffle suab rau kwv yees li sib npaug ntawm qhov nrawm los ntawm lub qhov rais thiab hauv crossflow, feem.
Cov neeg kho tshuab tsim ntawm lub plhaub thiab lub raj cua kub exchanger muab cov ntaub ntawv ntawm cov khoom xws li lub plhaub thickness, flange thickness, thiab lwm yam. Cov no yog xam siv lub siab hlab ntsha tsim code xws li Boiler thiab Pressure Vessel code los ntawm ASME (American Society of Mechanical Engineers) thiab British Master Pressure Vessel Standard, BS 5500. ASME yog cov cai feem ntau siv rau cov khoom siv hluav taws xob thiab yog nyob rau hauv 11 ntu. Tshooj VIII (Cov Ncauj Ntsig Siab) ntawm txoj cai yog feem ntau siv tau rau cov khoom siv hluav taws xob, tab sis Tshooj II - Cov Khoom Siv thiab Tshooj V - Kev Ntsuas Tsis Zoo kuj tseem cuam tshuam.
Ob leeg ASME thiab BS5500 tau siv dav thiab lees txais thoob plaws ntiaj teb tab sis qee lub tebchaws hais tias lawv tus kheej cov cai hauv tebchaws tau siv. Txhawm rau sim thiab ua kom yooj yim no Lub Koom Haum International Standards tam sim no tab tom sim tsim cov cai tshiab thoob ntiaj teb lees paub tab sis nws yuav yog qee lub sijhawm ua ntej qhov no tau txais.