Seawater Desalination Khoom Taw Qhia

Desalination tau dhau los ua txoj hauv kev tseem ceeb kom tau txais cov dej tshiab hauv thaj chaw dej tsis tshua muaj xws li Middle East. Ntawm cov seawater desalination ntau lawm txoj kev, feem ntau txhim khu kev qha thiab feem ntau siv txoj kev yog multi-theem flash evaporation txoj kev. Cov khoom siv ntawm txoj kev no yog tsim los ntawm cov dej hiav txwv cua sov, cov cua sov rov qab condenser, cov cua kub tso tawm condenser, qhov cua condenser thiab dav hlau compressor, thiab lwm yam. Ib feem ntawm cov qauv, qhov sib pauv cua sov yog siv ntau lub tshav kub hloov raj, cov khoom qub tooj liab. raj, vim hais tias cov tooj liab alloy tsis corrosion resistant, nws tau raug hloov los ntawm titanium raj. Ntawm lawv, cov khoom siv feem ntau siv rau cov phaj hauv cov phaj kub hloov pauv thiab cov khoom siv hluav taws xob sib txawv yog cov ntawv txias txias xws li austenitic stainless hlau, titanium thiab titanium alloys, nickel thiab nickel alloys. Kev lag luam ntshiab titanium GR1 yog siv rau phaj kub pauv roj, thiab muaj ntshiab titanium GR2 thiab titanium alloy GR12 (Ti0.3Mo0.8Ni) yog siv nyob rau hauv tubular tshav kub exchangers. Piv nrog rau tubular cua sov exchangers, phaj kub exchangers ua los ntawm GRl titanium daim hlau muaj ntau yam zoo thiab muaj kev sib tw hauv khw. Lawv tsuas yog siv rau hauv kev sib pauv cua sov xws li tshuaj lom neeg, roj av, nkoj nkoj, thiab dej hiav txwv desalination. Cov hom thiab kev siv ntawm titanium siv hauv seawater desalination yog qhia nyob rau hauv Table 1. Nrog rau kev loj hlob ntawm lub hwj chim thiab desalination kev lag luam nyob rau hauv Middle East thiab Asia, qhov kev thov rau nyias-walled titanium welded kav yuav maj mam nce, yog li tsav lub lag luam xav tau. rau titanium thiab tsim ib qho kev loj hlob ntawm kev lag luam tshiab.

1. Titanium yog cov khoom ntawm kev xaiv rau tshav kub exchangers ntawm seawater desalination khoom.

Titanium feem ntau yog siv hauv cov kav dej kub hauv cov khoom siv seawater desalination. Multi-theem flash desalination ntaus ntawv muaj cov cuab yeej paub tab, cov dej tso tawm loj, dej tshiab zoo, tsis tshua muaj nqi desalination, ntau daim ntawv thov, thiab kev ua haujlwm ruaj khov. Tsis tas li ntawd, nws siv cov hluav taws xob qis qis los ntawm cov chaw tsim hluav taws xob los ua kom muaj zog siv zog. 78% ntawm lub ntiaj teb cov dej tshiab ntim ntim yog txoj kev evaporation. Kev vam meej ntawm cov khoom siv hauv tsev MSF yuav ua rau nws nyiam cov khoom siv boiler pub dej rau cov chaw tsim hluav taws xob hauv ntug dej hiav txwv yav tom ntej.

Lub evaporator nyob rau hauv seawater desalination chav tsev yog raug rau high-kub seawater, thiab cov salinity nce tom qab evaporation. Titanium alloy tiv taus kub ion corrosion thiab tuaj yeem siv dav hauv evaporator ntawm seawater desalination khoom. Nyob rau tib lub sij hawm, titanium muaj zog corrosion kuj rau chlorine thiab yog cov khoom ntawm kev xaiv rau tshav kub exchangers ntawm seawater desalination khoom. Nrog rau kev loj hlob sai ntawm petrochemical, hluav taws xob hluav taws xob thiab lwm yam kev lag luam hauv thaj chaw ntug dej hiav txwv, hloov cov dej tshiab tshiab nrog dej hiav txwv raws li cov khoom siv cua txias tuaj yeem txuag tau ntau cov dej tshiab thiab tau txais txiaj ntsig kev lag luam thiab kev sib raug zoo. Txawm li cas los xij, vim muaj zog corrosiveness ntawm seawater, thaum lub raj ntim yog ua los ntawm cov pa roj carbon zoo tib yam los yog stainless hlau, seawater raws li qhov nruab nrab cua txias yuav ua rau mob hnyav rov ua rau lub raj ntim, uas yuav txo tau lub neej kev pab cuam ntawm lub tshav kub exchanger. , tsis tsuas yog nce tus naj npawb ntawm cov khoom siv hloov pauv, tab sis kuj ua rau cov khoom siv tsis ua haujlwm. Ua rau lub cuab yeej tsis ua haujlwm ntau dhau, yog li txo cov txiaj ntsig kev lag luam. Raws li ib txwm muaj, txhawm rau daws qhov teeb meem no, nws yog ib qho tsim nyog yuav tsum tau hloov kho cov khoom siv ntawm lub raj, thiab cov khoom siv kho dua tshiab feem ntau yog titanium raj.

Hais txog kev xaiv cov khoom siv titanium, kev lag luam ntshiab titanium ASTM Gr2 yog qhov siv dav tshaj plaws. Cov ntaub ntawv tseeb qhia tias muaj cov ntshiab titanium xws li Gr1 thiab Gr2 muaj kev tiv thaiv tshwj xeeb rau kev ntxhov siab corrosion tawg hauv dej ntuj, dej hiav txwv thiab ntau yam chlorides; thiab kev sib piv ntawm qhov kub thiab txias siab seawater heaters siv Gr7 lossis Gr12 nrog ntau dua corrosion kuj; Gr16 (Ti 0.5% Pd) muaj kev tiv thaiv corrosion ntau dua, tab sis tus nqi kim dua. Tsis tas li ntawd, hauv titanium seawater desalination cov cuab yeej nrog cov dej hiav txwv ntws ntawm 3 mus rau 5 m / s, qhov tshwm sim ntawm kev lom neeg fouling yog qhov tsawg tshaj plaws, thiab fouling coefficient ntawm titanium tshav kub exchanger yog hais txog {{10} }.95 rau 0.99. Kev lag luam ntshiab titanium GR1 seamless raj yog siv los ua lub condenser raj ntawm lub flash evaporator thiab lub tshav kub exchanger raj ntawm lub brine rhaub, thiab lub raj phaj yog xaiv GR1+16MnR+316L ob-sided composite hlau phaj. Titanium yog lub teeb, corrosion-resistant, thiab muaj lub zog siab. Nws yog cov khoom siv seawater corrosion-resistant, thiab nws cov kev ntseeg siab yog siab. Kev siv titanium composite steel phaj tuaj yeem txo tus nqi ntawm titanium siv, thiab tuaj yeem ua tau raws li qhov yuav tsum tau siv thiab txo tus nqi ntawm cov cuab yeej.

2. Titanium phaj kub exchanger khoom series

Titanium phaj kub exchangers yog siv nyob rau hauv seawater desalination li. Titanium phaj kub exchangers feem ntau muaj xws li vapor-kua hom titanium phaj condensers thiab kua-kua hom titanium phaj kub exchangers. Cov qauv tseem ceeb thiab cov lus qhia tshwj xeeb yog: phaj kub exchanger BR series, BR02, BR{{10}}35, BR046, BR08{ {22}}, BRl0, etc. ; Qhov sib npaug ntawm cov phaj kub exchanger BBR series, BBR06, BBR08, BBR10, thiab lwm yam. Cov phaj hloov hluav taws xob muaj ntau yam tshwj xeeb xws li 0.2m2, 0.35m2, 0.46m2, 0.60m2, 0.80m2, 1.0m2, 1.28m2, 1. -piece tshav kub txauv cheeb tsam), thiab lwm yam. Ntau hom kev sib hloov cua sov muaj cov khoom sib xws coefficients, uas tuaj yeem xaiv raws li lawv cov kev ua tau zoo.

Lub ntsiab technical parameters ntawm BR035 phaj kub exchanger yog: qhov chaw hloov hluav taws xob ib leeg yog 0.35m2; phaj qhov sib nrug yog 3.2mm; phaj thickness yog 0.8mm; lub kaum qhov taub txoj kab uas hla yog 120mm; thaj tsam ntu ntu ntawm ib qho ntws channel yog 0.001136m2 . , Lub peev xwm ua haujlwm siab tshaj plaws yog 120m3 / h; Lub tshav kub hloov pauv coefficient yog 2500-5000W / (m2 degree), kev ua haujlwm siab yog 1.6MPa; Kev ua haujlwm kub yog: thaum siv cov roj hmab nitrile hauv qab 120 degree, siv cov roj hmab ethylene-propylene Thaum lub gasket qis dua 180 degree, thaum siv cov roj hmab fluorine, nws qis dua 250 ~ C; Qhov siab tshaj plaws nruab cheeb tsam ntawm ib qho khoom siv yog 70m2, thiab qhov loj ntawm ib qho kev sib pauv cua sov yog 1.28m2, 1.3m2 thiab lwm yam khoom siv hluav taws xob ua kua hluav taws xob. Qhov loj-scale phaj kub exchanger muaj ib tug sab nraud qhov ntev ntawm 2.2m * 0.81m, lub phaj thickness ntawm 0.6 hli, thiab ib tug siab tshaj plaws ua ke cheeb tsam ntawm 350m2. Qhov no qhia tau hais tias kuv lub teb chaws muaj kev tsim thiab tsim muaj peev xwm rau titanium phaj kub exchanger khoom. Titanium rau tshav kub exchangers yog heev paub tab. Feem ntau siv titanium raj muaj ib txoj kab uas hla ntawm 10-80mm thiab phab ntsa thickness ntawm 0.3-0.5mm.

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