Ib qho kev qhia dav rau xaiv cov twj tshuaj chemical: los ntawm tus nqi txaus rau kev txiav txim siab ntawm corrosion.

TWJ ua haujlwm ua lub luag haujlwm tseem ceeb hauv kev tsim cov tshuaj, cuam tshuam ntau theem nrog rau kev pub mis, reflux, hauv qab. Txhawm rau kom muaj ntau ntau lawm, nws yog qhov tseem ceeb kom xaiv cov hom nqus dej tsim nyog raws li kev xav tau. Xaiv lub twj tso cai tsis muaj kev cuam tshuam cov txheej txheem kev ua tau zoo tab sis kuj tseem cuam tshuam ntau dhau kev nyab xeeb ntau dua thiab kev lag luam.

 

 

Tshuaj lom neeg xaiv cov chaw tso dej

1. Xyuas kom meej cov khoom siv twj uas tau xaiv thiab kev ua tau zoo ua tau raws li cov txheej txheem tsis xws li tus nqi ntws, lub taub hau, siab, cavitation ntws nrog, thiab xuas.
2. Lub twj tso kua mis yuav tsum ua kom tau raws li cov kev xav tau ntawm cov yam ntxwv ntawm cov yam ntxwv.

• Rau cov twj ua pob conveying flammable, tawg, tshuaj lom, xws li lub tshuab tsav tsheb yuav tsum muaj cov twj tso tawm, xws li nqus cov twj siv hluav taws xob, thiab cov kaus poom lub cev muaj zog tsav.
• Rau twj conveying corrosive video yuav tsum tau ua los ntawm corrosion {} {resistant twj thiab Cqf engineering tshuab sib nqus.
• Rau cov twj muaj cov khoom muaj cov khoom siv, cov Cheebtsam Contrection yuav tsum tau ua los ntawm kev hnav - Cov ntaub ntawv resistant; Yog tias tsim nyog, lub foob yuav tsum tau yaug nrog dej tu kua.

3. Muaj kev cia siab tiag tiag muaj yees, suab nrov tsawg, thiab kev co qis.

4. Kev txiav txim siab kev lag luam yuav tsum tau ua raws cov nqi ntawm tag nrho cov nqi, ua haujlwm, txij nkawm, thiab kev tswj hwm.

5. Xaiv cov tshuaj lom neeg nyob hauv cov xwm txheej sib xws:

• Centrifugal twj yog tsiag ntawv los ntawm kev kub ceev, teeb meem me me, kev ua haujlwm yooj yim, kev ua haujlwm yooj yim, kev saib xyuas yooj yim.
• Thaum metering yog yuav tsum tau, lub ntsuas mis metering yuav tsum tau xaiv.
• Thaum lub taub hau siab yuav tsum tau tab sis tus nqi txaus heev, thiab ib qho qes qis - Lub taub hau centrifugal twj tso kua mis tsis tau, ib reciprocating twj tso kua mis yuav siv tau; Yog tias cov cavitation yuav tsum tsis siab, lub chaw ua twj vortex tau tseem tuaj yeem raug xaiv.
• Thaum lub taub hau tsawg heev thiab tus nqi txaus yog loj heev, Axial Flow Twj thiab cov tshuaj yeeb sib xyaw tau xaiv.
• Thaum lub qhov nruab nrab viscosity yog qhov siab (ntau dua 650 ~ 1000 mm² / s), xav txog kev xaiv lub rotor twj lossis cov twj tso kua mis, cov ntsia hlau twj tso kua mis).
• Thaum cov ntsiab lus nruab nrab yog 75%, tus nqi txaus, thiab viscosity yog tsawg dua 37.4 mm² / s, ib vortex putter tuaj yeem xaiv tau.
• Rau cov xwm txheej uas nquag pib lossis nqus yog tsis yooj yim, twj nrog tus kheej {}} Presada centrifugal twj, thiab pneumatic (hluav taws xob) tshwj xeeb.

 

Flow tus nqi thiab taub hau ntawm cov tshuaj lom neeg

1. Txaus tus nqi yog ib qho tseem ceeb tsis muaj rau cov chaw xaiv cov chaw xaiv, cuam tshuam nrog cov kev tsim khoom txhua yam thiab kev xa khoom siv. Piv txwv li, cov chaw tsim qauv tuaj yeem laij cov twj tso kua mis txoj kev coj los khiav li qub, txo qis tus nqi thaum lub sijhawm tsim qauv. Thaum xaiv lub twj tso kua mis, tus nqi ntws tau feem ntau yog raws li tus nqi txaus siab tshaj plaws. Yog tias tus nqi qis tshaj plaws yog tsis muaj, nws tuaj yeem coj raws li 1.1 lub sij hawm tus nqi txaus.
2. Lub taub hau xav tau ntawm lub system yog lwm lub twj tso dej tseem ceeb ua ntsuas kev ntsuas. Lub taub hau yog ib txwm xaiv los ntawm nce nws los ntawm 5% rau 10%.
3. Cov yam ntxwv ntawm cov kua, suav nrog lub npe, cov khoom siv lub cev, tshuaj lom neeg cuam tshuam nrog lub taub hau system, thiab lwm yam kev xaiv cov khoom tso kua mis, thiab hom ntawm cov xaim foob xaiv.
4. Cov piping layout tej yam kev mob ntawm cov cuab yeej hloov xa mus rau cov ntaub ntawv xws li cov kev sib tw ua kua, thiab kom muaj cov khoom noj qab haus huv, thiab kom muaj kev sib dhos, cov khoom siv ua kua ntev (NP {{{}} kev nyab xeeb kev nyab xeeb).
5. Txiav txim siab cov haujlwm ua haujlwm, xws li ua kua ua haujlwm kub, satitive plhaw siab (tsau lossis lwm yam yog txhua yam tseem ceeb rau kev xaiv.

 

Piping Layout Ntawm Tshuaj Txhuam Cov Twj

• Xaiv cov kab ntsig kom haum. Lub taub dej loj dua loj dua nyob rau hauv qis ntws nrawm thiab tsawg tsis kam poob, tab sis kuj tseem muaj nqi siab dua; Ib lub taub loj dua cov taub yuam kev ua rau muaj ntau dua tsis kam ploj thiab yuav tsum tau lub taub dej siab dua. Ua kom muaj zog ntxiv ua rau cov nqi nce thiab cov kev siv khiav lag luam. Yog li ntawd, ib qho kev txiav txim siab los ntawm kev pom kev siv nyiaj thiab kev lag luam yog qhov tsim nyog.
• Cov yeeb nkab paug thiab nws cov pob qij txha yuav tsum tsim los tiv thaiv qhov siab tshaj plaws.
• Kev rub tawm yuav tsum tau nteg tawm siv cov kav dej ncaj thaum twg ua tau, txo cov yeeb nkab kom ntev li ntau tau. Thaum ua kom khoov, kev khoov tshuab hluav taws xob yuav tsum tau 3-5 zaug ntawm lub raj kab ntsig, thiab lub kaum sab xis yuav tsum muaj ntau dua 90 degree.
• Lub twj tso kua mis tawm yuav tsum tau nruab nrog lub valve (pob valve lossis rooj vag valve, thiab lwm yam) thiab lub cim kos. Lub valve no yog siv los tswj lub twj tso kua mis txoj haujlwm ua haujlwm. Daim tshev hluav taws xob tiv thaiv lub twj tso kua mis los ntawm kev thim rov qab vim cov dej rauj thiab tiv thaiv cov rauj (uas tsim kev puas tsuaj rau lub twj tso kua mis).

 

Tshuaj Chim Tso Xaiv Cov Tso Cai

• Daim ntsaws ruaj ruaj

Rau cov ntsaws ruaj ruaj, feem ntau tsuas yog ob hom gaskets thiab ntsaws ruaj ruaj, nrog o {{}} rings yog cov feem ntau siv.

Rau cov ntsaws ruaj ruaj, tshuaj lom cov twj tsis tshua muaj siv cov ntsaws ruaj ruaj, feem ntau ua haujlwm ntsaws ruaj ruaj. Cov ntsaws ruaj ruaj ceals tau faib ua ib qho - -}}}}}} thiab tsis sib haum. Balanced cov ntsaws ruaj ruaj yog tsim nyog rau high- siab i}} siab meter (feem ntau yog hais txog ntau dua 1.0 mpa). Double-ended mechanical seals are mainly used for high-temperature, easily crystallizing, viscous, particulate-containing, and toxic volatile media. Muab ob npaug {{11 {}}} Cov ntawv kaw me nyuam xaus rau kev sib tsoo kab noj hniav, nrog lub siab feem ntau 0.2 mpa ntau dua li qhov nruab nrab siab.

• Sealing Cov Ntaub Ntawv

Cov khoom siv rau cov ntsaws ruaj ruaj hauv cov twj tshuaj yeeb yog cov fluororubber; Hauv cov ntaub ntawv tshwj xeeb, Polytetrafluoroethylene (PTFE) tuaj yeem siv. Cov khoom xaiv rau cov ib ncig nyob ruaj ruaj thiab cov nplhaib sib luag ntawm cov tshuab foob yog qhov tseem ceeb dua. Nyuaj alloys tsis tas tsim los ntawm tib cov ntaub ntawv; Lawv yog kim, thiab qhov txawv txav tsis zoo yog tsis tsim nyog. Yog li ntawd, nws yog qhov zoo rau sib txawv lawv raws li cov yam ntxwv ntawm nruab nrab.

 

Kev Xaiv Cov Xov Xwm Tshwj Xeeb rau Cov Khaub Ncaws Twj

• Sulfuric acid

Kev corrosiveness ntawm sulfuric acid sib txawv heev nyob ntawm nws cov kev xav thiab kub. Rau cov sulfuric sulfuric acid (saum toj 80%) thiab qis dua 80 degree, carbon steel thiab tsis haum rau cov neeg ua haujlwm zoo corrosion, tab sis yog tsis haum rau qhov siab- ceev txaus.

Cov ntaub ntawv tsis zoo rau cov twj thiab li qub:

Cov hlau uas tsis zoo li qub, xws li 304 (0cr18ni9), 316 (0cr18ni12mo2ti)

Twj thiab li qub rau cov sulfuric acid feem ntau ua los ntawm high {{0} {{1} {} ecloy 20). Fluoropoplastics muaj cov sulfuric acid tsis kam; Siv fluoropolymer - lineed twj (F46) yog kev xaiv ntau dua.

• Hydrochloric acid

Feem ntau cov ntaub ntawv hlau tsis tiv thaiv hydrochloric acid corrosion (suav nrog ntau hom stainless hlau). Molybdenum -} muaj siab- hlau tuaj yeem siv tau ntawm 50℃thiab hauv 30% hydrochloric acid mob.

Nyob rau hauv sib piv rau cov ntaub ntawv hlau, feem ntau tsis - nws cov ntaub ntawv hlau tau zoo rau cov acidrocoric acid corrosion; Yog li, cov roj hmab twj thiab cov twj yas (xws li polypopylastics, thiab lwm yam) yog qhov kev xaiv zoo tshaj plaws rau kev xa khoom hydrochloric acid.

• Nitric Acid

Nyob rau hauv ib txwm muaj xwm txheej, feem ntau hlau corrode thiab tawg sai sai nyob rau hauv nitric acid. Stainless hlau yog qhov feem ntau siv nitric acid - Cov ntaub ntawv tiv taus corrosion, nthuav qhia cov acid zoo nyob rau ntau qhov siab. Nws yog tsim nyog sau tseg tias Molybdenum {{3} muaj cov hlev ntawm cov hlau nitric piv rau cov hlau tsis zoo (xws li 304), thiab qee zaum tseem phem dua. Rau siab - kub nitric acid, titanium thiab titanium alloys feem ntau yog siv.

• Acetic acid

Acetic acid yog ib qho ntawm cov acids organic ntau tshaj. Cov hlau zoo tib yam corrode loj hauv acetic acid daws ntawm ntau yam kev ua thiab kub. Stainless hlau yog ib qho zoo heev acetic acid - cov ntaub ntawv tiv taus. Molybdenum -}}} Nws muaj 316 stainless hlau kuj tseem siv tau rau hauv high- kub thiab dilute acetic acid vapor ib puag ncig. Rau cov ntawv thov hnyav li siab xws li high {{8} {{{{{{{}} almoyplastic packs tuaj yeem siv tau.

• Alkali (sodium hydroxide)

Zoo tib yam stainless hlau tsis muaj tus muaj txiaj ntsig zoo hauv alkali kev tiv thaiv piv rau cam khwb cia hlau. Tsis pom zoo cov hlau tsis pom zoo thaum muaj cov hlau me me ntawm cov hlau hauv nruab nrab yog tso cai.

Rau siab - kub alkaline kua, titanium thiab titanium alloys lossis siab}} Alloy allloy stainless hlau yog feem ntau siv. Peb General - lub hom phiaj nrum hlau twj tuaj yeem siv hauv cov kev daws teeb meem qis alkaline ntawm chav tsev. Txog cov kev cai tshwj xeeb, ntau lub thawv hlau uas tsis muaj fluoroplastic tuaj yeem siv tau.

• Ammonia (ammonium hydroxide)

Feem ntau cov hlau thiab tsis {- cov hlau yog medals yog me ntsis corrosive hauv kua ammonia (ammonium hydroxide), tsuas yog tooj liab thiab tooj liab alloys.

• Brine (seawater)

Cov hlau zoo tib yam tsis yog corrosive hauv sodium chloride daws teeb meem, seawater, thiab feem ntau yuav tsum tau tiv thaiv xim. Ntau yam stainless hlau tseem muaj cov nqi qis heev corrosion, tab sis corrosion nyob hauv corrosion hauv nroog yuav tshwm sim vim chloride ion txiav txim; 316 Stainless hlau feem ntau ua tau zoo dua.

• Cawv, Cov Getones, Esters, Kev Txawj

Cov cawv xws li methanol, ethanol, ethylene glycol, propanol, thiab lwm yam; Ketone Media muaj xws li acetone, methyl ketream, thiab lwm yam; Ester Media muaj ntau yam methyl esters, Ethyl esters, thiab lwm yam .; Ethaws muaj pes tsawg yam muaj xws li dimethy ether, ether ether} {4 4} corrosive, thiab cov khoom siv uas ib txwm siv yog qhov haum. Kev xaiv tshwj xeeb yuav tsum ua raws li cov khoom ntawm nruab nrab thiab cov cai muaj cai.

 

Nws yog tsim nyog sau cia tias ketones, esters, thiab cov neeg siv tshuaj estr, thiab yog soluble nyob rau hauv ntau ntawm cov khoom yuam kev, yog li zam qhov yuam kev hauv kev xaiv ntawm cov ntaub ntawv sib khi.

 

Cov nyhuv ntawm viscosity thiab kub

Lub viscosity ntawm nruab nrab muaj qhov cuam tshuam tseem ceeb ntawm cov kua mis ua tau zoo. Raws li viscosity nce, lub tshuab nqus dej lub taub hau curses, thiab txaus tus nqi nyob rau hauv kev ua haujlwm zoo tshaj kuj muaj nqis, yog li txo kev ua haujlwm. Feem ntau, cov kev ua tau zoo ntawm lub twj tso kua mis thaum nqus dej yog nws cov khoom ua tau zoo. Thaum nqus cov xov tooj tawm, kev hloov dua siab tshiab yog yuav tsum tau (kho cov ntsiab lus rau cov viscosities txawv tuaj yeem pom hauv cov qauv hloov hloov tshiab). Kev tso kua mis siab- viscosity pulp, pastes, thiab kua dej khov, ntsia hlau twj tau pom zoo.

 

Rau kev tshaj xov xwm nrog kub hauv qab no 120 degree, qhov kev ua kom txias tshwj xeeb feem ntau tsis muab; Tshaj tawm nws tus kheej ua cov roj nplua nyeem thiab txias.

Rau kev tshaj tawm nrog qhov kub siab tshaj 120℃tab sis hauv qab 300 degree, ib chav txias yuav tsum tau muab rau ntawm cov twj tso kua mis. Lub chambering sealing yuav tsum tau txuas nrog lub txias txias (siv ob lub tshuab siv tshuab). Thaum tus txias tsis tuaj yeem nkag mus rau hauv kev tshaj tawm, xov xwm yuav tsum tau kos tawm rau kev txias thiab txuas nrog lub txias (qhov no tuaj yeem ua tiav los ntawm kev hloov kho cua sov yooj yim).

 

Rau siab - kub me tshaj tawm nrog qhov kub siab tshaj 300 tawm tsam cov kab ke yuav tsum tau muab nruab nrog lub zog txias. Twj yog feem ntau cov xov xwm tsis txaus siab. Hlau cov neeg siv hluav taws xob Ntaus cov ntsaws ruaj ruaj, tab sis lawv kim dua (ntau tshaj 10 zaug tus nqi ntawm cov tshuab sib xyaws sib thooj).