Thaum tsim qauv siv, nws yog qhov tsim nyog los txiav txim siab lub hom phiaj thiab kev ua tau zoo ntawm lub twj tso kua mis thiab xaiv lub twj tso kua mis. Qhov kev xaiv no yuav tsum xub pib nrog kev xaiv ntawm hom thiab daim ntawv ntawm lub twj tso kua mis. Yog li dab tsi cov hauv paus ntsiab lus yuav tsum tau siv los xaiv lub twj tso kua mis? Lub hauv paus yog dab tsi?
Tso Cai Tso Kua tsib lub ntsiab cai
1. Ua cov hom thiab kev ua tau zoo ntawm cov khoom siv tau xaiv tau raws li cov txheej txheem ntws, lub taub hau, siab, cavitation kub, xuas lub taub hau, thiab lwm yam.
2. Cov kev xav tau ntawm cov yam ntxwv nruab nrab yuav tsum tau ua.
Rau cov twj uas thauj cov nplaim hluav taws, tawg tau los yog cov twj tso kua mis, xws li lub twj tso kua mis, xws li tso kua mis ua si, thiab tso cov ntoo tso tawm; Rau cov twj uas thauj cov xov xwm kev thauj khoom, cov ntaub ntawv convection yog yuav tsum tau ua los ntawm corrosion-resistant cov ntaub ntawv, xws li AFB stainless hlau corrosion-resistant twj thiab Cqf engineering tshuab sib nqus.
Rau cov twj uas thauj cov xov xwm uas muaj cov khoom siv uas muaj txiaj ntsig zoo, thiab cov ntaub ntim cov raj nrog cov kua huv uas tsim nyog.
3. Muaj kev cia siab tiag tiag muaj yees, suab nrov tsawg, thiab kev co qis.
4. Kev lag luam, tag nrho cov nqi ntawm cov cuab yeej, kev ua haujlwm, kev coj tus nqi tswj thiab kev tswj hwm yuav tsum tau txiav txim siab kom txo tau tus nqi tag nrho.
5. Centrifugal twj muaj cov yam ntxwv ntawm kev kub ceev, loj me me, muaj kev kub ntxhov, kev ua haujlwm loj, kev ua haujlwm yooj yim.
Yog li ntawd, tsuas yog rau cov xwm txheej hauv qab no, cov twj nruab nrab centrifugal yuav tsum tau siv kom ntau li ntau tau:
Thaum muaj lub ntsuas ntsuas yuav tsum tau ua, lub ntsuas lub cev yuav tsum tau siv.
Thaum lub taub hau yuav tsum tau muaj siab heev, tus nqi txaus heev thiab tsis muaj haum me me centrifugal twj tso kua mis muaj, ib reciprocating twj tso kua mis tau siv. Yog tias qhov kev ua haujlwm tsis txaus ntseeg tsis yog siab, ib qho chaw nres tsheb vortex kuj tseem siv tau. Thaum lub taub hau yog tsawg heev thiab tus nqi txaus yog loj heev, ib tug axial ntws tawm twj tso kua mis thiab cov khoom siv ntws sib xyaw tuaj yeem siv tau.
Thaum lub nruab nrab viscosity yog qhov loj (ntau dua 650 ~ 1000mm2 / s), lub rotor twj tso kua mis (iav twj tso kua mis, tso ntsia hlau.
Thaum cov roj cov ntsiab lus ntawm qhov nruab nrab yog 75%, tus nqi txaus thiab qhov viscosity yog tsawg dua 37.4mm2 / s, ib vortex putter yuav siv tau.
Rau qee zaus yog nquag los yog txhaws lub twj tso kua mis yog qhov tsis yooj yim, ib lub twj tso kua mis nrog tus kheej prentrifugal twj tso kua mis, thiab pneumatic (hluav taws xob) diaphragm tso kua mis.
Siv sij hawm tso kua mis
Kev xaiv cov kev xaiv cov tso kua mis yuav tsum tau txiav txim siab los ntawm tsib yam uas ntws thiab tso dej, cov khoom siv kua, thiab kev ua haujlwm.
1. Flow tus nqi
Ntog tus nqi yog ib qho ntawm cov ntaub ntawv tseem ceeb ua rau kev xaiv cov twj tso kua mis, uas yog ncaj qha rau cov khoom muaj peev xwm thiab khoom tau muaj peev xwm ntawm tag nrho cov khoom siv. Piv txwv li, qhov qub, thiab ntau tshaj plaws ntawm cov tso kua mis tuaj yeem muab xam rau hauv cov txheej txheem tsim qauv. Thaum xaiv lub twj tso kua mis, tus nqi txaus siab tshaj plaws yog siv raws li lub hauv paus, kev coj mus rau hauv tus account tus nqi txaus. Thaum tsis muaj tus nqi txaus siab tshaj plaws, 1.1 lub sijhawm ntawm tus nqi txaus feem ntau yuav tau ua raws li tus nqi txaus siab tshaj plaws.
2. Lub taub hau
Lub taub hau yuav tsum tau los ntawm lub cuab yeej cuab yeej yog lwm cov ntaub ntawv tseem ceeb ua haujlwm tseem ceeb rau kev xaiv cov twj tso kua mis. Feem ntau, lub taub hau tom qab me ntsis cov npoo los ntawm 5% -10}% yog siv rau xaiv.
3. Cov kua khoom
Cov khoom ua kua suav nrog lub npe ntawm cov kua nruab nrab, cov khoom siv lub cev, tshuaj lom neeg thiab lwm yam khoom. Lub cev siv lub cev muaj xws li kub c, ntom d, viscosity U, cov ntsiab lus roj ceg, cov khoom siv tshuaj lom neeg tsuas yog xa mus rau cov tshuaj corrosiveness thiab toxicity ntawm cov kua Nruab nrab, uas yog lub hauv paus tseem ceeb rau kev xaiv cov khoom ntim cov khoom thiab hom twg ntawm txoj hlua khi los xaiv.
4. Kev xa xov xwm pipeline
Lub pipeline layout tej yam kev mob ntawm lub cuab yeej ntsuas xa mus rau cov kua zaub qhov siab, cov kua qis tshaj plaws nyob rau hauv ib sab thiab lwm cov ntaub ntawv thiab cov ntaub ntawv speceline thiab cov pipeline specifications thiab lawv ntev, Cov ntaub ntawv, cov yeeb nkab fittings, kom muaj nuj nqis, thiab lwm yam, txhawm rau laij cov kab ke lub taub hau thiab kos cov cavitation npoo.
5. Kev khiav hauj lwm
Cov kev ua haujlwm muaj ntau cov ntsiab lus, xws li cov ua haujlwm ua kua t, ntxhia dej sab siab pz (qhov chaw ua haujlwm siab, txawm tias txoj haujlwm yog ib qho sib quas ntus lossis txuas ntxiv mus, thiab seb Lub twj tso kua mis yog tsau lossis txav tau.
Cov roj av thiab cov lag luam lag luam nyob ib txoj haujlwm tseem ceeb heev hauv kev lag luam hauv tebchaws. Raws li ib qho cuab yeej tseem ceeb txhawb nqa, cov txheej txheem tshuaj lom neeg kuj tseem nyiam ntau dua thiab ntau dua. Vim tias cov yam ntxwv nyuaj ntawm kev tshuaj lom neeg thiab nce ntxiv rau kev tiv thaiv ib puag ncig, yam uas yuav tsum tau them siab rau thaum xaiv cov twj tshuaj lom?
01. Qhov cuam tshuam ntawm corrosion
Corrosion ib txwm yog ib qho ntawm cov teeb meem kev teeb meem tshaj plaws ntawm cov khoom siv tshuaj lom neeg. Yog tias koj tsis ceev faj, nws yuav ua rau cov khoom puas ntawm qhov tsawg tshaj plaws, thiab ua rau muaj kev puas tsuaj lossis txawm tias muaj kev puas tsuaj ntawm qhov phem tshaj. Raws li cov txheeb cais, txog 60% ntawm kev puas tsuaj rau cov khoom siv tshuaj lom neeg yog tshwm sim los ntawm kev xeb. Yog li ntawd, thaum xaiv cov twj tshuaj chemical, koj yuav tsum xub them rau kev tshawb fawb txog kev xaiv.
Feem ntau muaj feem ntau tsis muaj kev nkag siab hais tias cov hlau tsis muaj zog yog cov khoom siv "Universal". Nws yog qhov txaus ntshai heev kom siv stainless hlau tsis hais txog qhov nruab nrab thiab ib puag ncig cov xwm txheej. Hauv qab no yog kev sib tham ntawm cov ntsiab lus tseem ceeb ntawm cov khoom siv rau qee cov tshuaj siv tshuaj lom neeg:
1. Sulfuric acid
Raws li ib qho ntawm cov muaj zog corrosive medoo, sulfuric acid yog ib qho tseem ceeb muaj cov khoom siv muaj kev siv nrog ntau yam ntawm kev siv. Sulfuric acid ntawm ntau qhov ntau thiab qhov kub muaj qhov sib txawv hauv kev xeb ntawm cov ntaub ntawv. Rau concentrated sulfuric acid nrog lub tswv yim ntau dua 80% thiab lawv tsis haum rau corrosion, tab sis lawv tsis haum rau kev siv roj av zoo nkauj acid thiab tsis haum rau kev siv Cov ntaub ntawv rau twj thiab li qub.
Zoo tib yam stainless hlau xws li 3 {0 4 ({}} 4 ({}} cr18ni}) Yog li ntawd, twj thiab li qub rau kev sib txuas sulfuric acid feem ntau yog ua los ntawm cov hlau siab nrum hlau (nyuaj rau kev pov thiab cov txheej txheem siab) thiab cov roj hluav taws xob siab). Fluoroplastics tau zoo tsis kam mus rau sulfuric acid, thiab siv cov fluorine-lined twj (F46) yog kev xaiv ntau dua. Lub tuam txhab cov khoom siv muaj xws li: cov kua roj fluorine-lined, pf (fs) cov twj tso kua mis hnyav-corrosion, cqb-f fluorine yas sib nqus twj, thiab lwm yam.
2. Hydrochloric acid
Cov ntaub ntawv hlau feem ntau tsis tiv thaiv hydrochloric acid acid corrosion (suav nrog ntau cov hlau ntau stainless hlau) tsuas yog siv rau hydrochloric acid hauv caug 50 degree thiab 30%. Rov qab mus rau cov ntaub ntawv hlau, feem ntau tsis yog xim hlau cov khoom lag luam muaj cov roj hmab zoo nkauj, xws li cov roj hmab roj hmab, thiab cov tshuaj yas) yog cov kev xaiv hydrochloric acid. Lub tuam txhab cov khoom muaj xws li: iHf fluorine-lined pob, resistant centrugal twj tso kua mis, CQ Polypropylenation Twj (lossis lwm yam.
3. Nitric acid
Feem ntau, feem ntau cov hlau yog corroded sai thiab muab pov tseg hauv nitric acid. Stainless hlau yog qhov feem ntau siv nitric acid-resistant cov khoom siv. Nws muaj zoo corrosion tsis kam rau nitric acid ntawm txhua qhov siab ntawm chav sov. Nws yog tsim nyog teev tias molybdenum-muaj cov hlau stainless (xws li 316, 311) hauv corrosion steelion (xws li 304) hauv nitric acid, tab sis qee zaum tseem phem dua.
Rau kev kub nitric acid, titanium thiab titanium alloy cov ntaub ntawv feem ntau yog siv. Lub tuam txhab cov khoom siv suav nrog: DFL (W) H) cov txheej txheem tshuaj lom neeg cov roj ntsha, DFCZ cov twj tshuaj yeeb, IH tshuaj chemical twj, thiab lwm yam, ua los ntawm 304.
4. Acetic Acid
Nws yog ib qho ntawm cov tshuaj corrosive feem ntau ntawm cov orgiic acids. Cov hlau zoo tib yuav raug ua rau muaj kev mob siab rau hauv cov acidet acid ntawm txhua qhov ntau thiab qhov kub. Stainless hlau yog ib qho zoo heev acetic acid resistant cov khoom. Molybdenum-muaj 316 stainless hlau kuj tseem siv tau rau qhov kub thiab dilute acetic acid vapor. Rau cov kev xav tau xws li kub thiab siab acetic acid los yog lwm yam kev sib xyaw ntawm cov tawv nqaij lossis cov roj ua kom zoo nkauj uas muaj fluoroplastic tuaj yeem raug xaiv.
5. Alkali (sodium hydroxide)
Hlau tau dav siv nyob rau hauv sodium hydrocide daws hauv qab 80 degree thiab tsis pub dhau 30% siab. Tseem muaj ntau yam uas tseem siv cov hlau zoo li qub ntawm 100 degree thiab qis dua 75%. Txawm hais tias corrosion nce, nws yog yig.
Zoo tib yam stainless hlau tsis muaj qhov pom tseeb dua cam khwb cia hlau hauv corrosion tsis kam rau alkali daws. Tsuav cov hlau me me tau raug tso cai ntxiv rau hauv nruab nrab, stainless hlau tsis pom zoo. Rau qhov kub alkali daws, Titanium thiab titanium alloys lossis siab alloy stainless hlau feem ntau yog siv. Lub tuam txhab cov dav dav cam khwb cia hlau twj tuaj yeem siv rau kev daws cov tshuaj alkali ntawm chav sov. Thaum muaj cov kev tshwj xeeb, ntau hom kev nqus hlau steel lossis cov fluoroplastic Twj yuav siv tau.
6. Ammonia (ammonia hydroxide)
Feem ntau cov hlau thiab cov hlau tsis yog me ntsis corroded hauv kua ammonia thiab ammonia hydrocide), tsuas tooj liab thiab tooj liab alloys tsis haum rau kev siv. Feem ntau ntawm cov tuam txhab cov khoom lag luam yog qhov tsim nyog rau kev thauj mus los ntawm Ammonia thiab ammonia dej.
7. Ntsev Dej (Seasater)
Cov hlau corrosion ntawm dog dig hlau hauv sodium tshuaj chloride tov, dej hiav txwv thiab ntsev tsis muaj kev tiv thaiv; Ntau hom stainless hlau kuj muaj cov txheej txheem corrosion tsawg heev, tab sis yuav ua rau corrosion tsis zoo vim chloride li ntawm cov hlau hauv nroog, thiab 316 stainless hlau feem ntau zoo dua. Txhua yam tshuaj lom neeg twj tso kua mis ntawm lub tuam txhab tau teeb tsa nrog 316 cov ntaub ntawv.
8. Cawv, Ketones, Esters, Kev Txawj
Cov pa cawv ntau yam muaj xws li methanol, ethanous glycol, ethanone, thiab lwm yam, ethanouse ether ether ether ether, ethyl ether, tab sis ethyl ether , thiab lwm yam. Thaum xaiv, kev xaiv tsim nyog yuav tsum ua raws li cov khoom ntawm cov nruab nrab thiab lwm yam.
Nws tseem tsim nyog sau cia tias ketones, esters, thiab cov neeg ua kom zoo yog soluble ntau hom kev rub tawm, yog li zam kev ua yuam kev thaum xaiv cov ntaub ntawv sealing.
02. Tus yam ntxwv ntawm lwm yam
Feem ntau, cov to taub hauv raj xa hluav taws xob tuaj yeem tsis quav ntsej hauv cov txheej txheem ntws ntawm cov twj muaj kev lag luam, tab sis qhov kev cuam tshuam ntawm cov txheej txheem hloov pauv yuav tsum tau txiav txim siab. Yog tias cov twj ua liaj ua teb siv qhib raws li kev thauj mus los hauv dej, xau thiab evaporation yuav tsum tau txiav txim siab.
Siab: Swb Tank Siab, tso kua roj tso kua mis siab, siab qhov sib txawv hauv cov raj xa hluav taws xob (taub hau poob).
Cov xov hluav taws xob system (cov yeeb nkab taub, ntev, hom thiab naj npawb ntawm cov twj siv hluav taws xob, cov khoom siv ntsuas hluav taws xob los ntawm kev nqus tank rau siab tank, thiab lwm yam).
Yog tias tsim nyog, ib qho cuab yeej nkhaus yuav tsum tau kos.
03. Tus Neeg Kav Dej Pipelines
Thaum tsim qauv thiab npaj cov raj xa hluav taws, cov teeb meem hauv qab no yuav tsum tau sau tseg:
(1) Qhov kev xaiv tsim nyog ntawm cov raj xa dej uas hla. Cov kav dej loj loj txhais tau tias yog cov kua roj me me thiab cov kua me me thiab tsis kam poob ntawm tib tus nqi txaus, tab sis tus nqi siab. Lub taub dej loj me me yuav ua rau muaj qhov nce siab nce, nce lub taub hau ntawm cov twj tso kua mis, nce lub zog, thiab nce nqi thiab kev siv tsheb khiav haujlwm. Yog li ntawd, nws yuav tsum tau txiav txim siab los ntawm kev xav txog kev siv nyiaj thiab kev lag luam.
(2) Lub siab siab tshaj plaws uas cov yeeb nkab paug thiab nws cov pob qij txha tuaj yeem tiv taus yuav tsum tau txiav txim siab.
(3) Cov raj xa dej yuav tsum tau npaj kom ncaj li sai tau, thiab tus naj npawb ntawm cov khoom siv hauv cov raj xa dej thiab qhov ntev ntawm cov raj xa dej yuav tsum tau txo qis. Thaum ib qho tig yog qhov tsim nyog, kev khoov cov vojvoog ntawm lub luj tshib yuav tsum yog 3 txog 5 zaug uas cov uas hla ntawm cov raj dej, thiab lub kaum sab xis yuav tsum muaj ntau li sai tau.
(4) Li qub (pob li qub los yog txiav li qub, thiab lwm yam) thiab xyuas cov npoo yuav tsum tau muab tso rau sab nraud ntawm lub twj tso kua mis. Lub pob valve yog siv los kho cov haujlwm ua haujlwm ntawm lub twj tso kua mis. Tus kos duab valve tuaj yeem tiv thaiv lub twj tso kua mis los ntawm kev thim rov qab thaum cov kua ntws rov qab thiab tiv thaiv cov twj tso kua mis los ntawm kev ntaus ntoo. (Thaum cov kua ntws rov qab, rov qab loj rov qab siab yuav tsim tawm, ua rau muaj kev puas tsuaj rau lub twj tso kua mis)
04. Tus Cuam Tshuam Ntawm Cov Hneev
Kev txiav txim siab ntawm ntws
(1) Yog tias qhov tsawg kawg nkaus, ib txwm muaj, thiab ntau tshaj plaws ntawm cov qib tau muab rau hauv cov txheej txheem ntau lawm, tus nqi txaus yuav tsum tau txiav txim siab.
(2) yog tias tsuas yog tus nqi txaus yog muab rau hauv cov txheej txheem ntau lawm, ib qho paj laum yuav tsum tau txiav txim siab.
Rau NS100 Cov Twj ntws loj thiab qis lub taub hau, cov dej ntws tawm yog 5%, rau 50 tsawg dua lossis sib npaug rau 100 lub twj, ntws Margin tseem yog 5%, rau cov twj ntawm cov tsis zoo thiab kev ua haujlwm tsis zoo, cov npoo ntws yuav tsum yog 10%.
(3) Yog tias cov ntaub ntawv yooj yim tsuas yog muab cov hnyav txaus, nws yuav tsum hloov pauv mus ntim rau hauv cov khoom khiav.
05, tus yam kub
Lub tsheb thauj mus los ntawm kev kub siab nruab nrab muab cov qauv hauv siab dua ntawm cov qauv, cov ntaub ntawv thiab cov nruab nrog cov tshuab ntawm cov twj tso kua mis. Cia peb tham txog qhov yuav tsum muaj rau txias nyob rau hauv qhov kub thiab txias hloov thiab muaj cov twj tso kua mis:
(1) rau xov xwm nrog qhov kub thiab txias hauv qab no 120 degree, ib qho tshwj xeeb txias cov kab ke feem ntau tsis teeb tsa, thiab nruab nrab nws yog feem ntau siv rau lubrication thiab cua txias. Zoo li DFL (W) H) Cov Tshuaj Siv Tshuaj Yeeb, W) PH ntawm cov roj ntsha (muaj qib tiv thaiv lub cev muaj zog yuav tsum yog qib siab thaum nws tshaj 90 degree).
DFCZ zoo tib yam hom thiab IH tshuaj chemical twj tuaj yeem ncav cuag lub surly Kub txwv ntawm 140 degree ~ 160 degree vim yog cov qauv raug cai; Qhov nyiaj ntau tshaj plaws ntawm IHF fluorine-lined twj tso tawm tau txog 200 degree; Tsuas yog CQB puas yog cov twj sib nqus uas muaj kev ua haujlwm kub tsis yog tshaj 100 degree. Nws yog tsim nyog teev uas rau cov xov xwm uas yooj yim rau crystallize lossis muaj cov lus sib xyaw, ib qho kev sib tsoo saum npoo av yuav tsum tau muab (interfaces tau muab tshwj tseg thaum lub sijhawm tsim).
(2) rau xov xwm saum toj kawg nkaus 120 degree thiab nyob rau hauv 300 degree, ib qho txias chamber yuav tsum tau txuas nrog coolant (thiab ob-xaus tshuab foob yuav tsum tau muab). Thaum lub coolant tsis pub nkag mus rau hauv nruab nrab, nruab nrab nws tus kheej yuav tsum txias thiab tom qab ntawv txuas nrog kev hloov kho cua sov yooj yim los ntawm kev hloov kho kub yooj yim).
Tam sim no, lub tuam txhab muaj cov txheej txheem dfcz chemical, grg ntsuas kub ntsuas kub thiab HPK kub dej ncig ua haujlwm (hauv qab kev txhim kho) rau kev xaiv. Tsis tas li ntawd, CQB-g high-kub sib nqus nqus tau tuaj yeem siv rau cov xov xwm kub siab tsis pub dhau 280 degree.
(3) Rau cov xov xwm kub siab tshaj 300 degree, tsis tsuas yog lub taub hau tso kua mis yuav tsum tau txias, tab sis kuj muab cov zaub mov ncua kev ncua yuav tsum tau nruab nrog lub zog txias. Lub twj tso kua mis yog feem ntau yog qhov chaw txhawb nqa chaw. Cov tshuab sib khi yog dua li cov hlau sib tsoo, tab sis tus nqi siab (tus nqi yog ntau dua 10 zaug uas ntawm cov tshuab sib dhos). Tam sim no, lub tuam txhab tsuas yog muaj dfay centrifugal roj twj uas tuaj yeem ncav cuag ib tug kub ntawm 420 degree (nyob rau hauv txoj kev loj hlob).
06. Cuam tshuam ntawm kev ua haujlwm
Tsis muaj kev xau yog txoj kev ua haujlwm nyob mus ib txhis. Nws yog qhov kev xav tau no tau ua rau muaj kev nce ntxiv ntawm cov twj sib nqus thiab cov nyom twj tso nyiaj. Txawm li cas los xij, tseem muaj txoj kev mus ntev mus rau qhov tsis muaj kev nqus twj ntawm cov khoom nqus lub tes tsho, qhov teeb meem ntawm cov khoom siv, thiab lwm yam Cov. Tam sim no cia peb qhia luv luv hais qee cov ntaub ntawv yooj yim txog kev foob.
Daim Ntawv Sealing
Rau cov ntsaws ruaj ruaj, feem ntau tsuas yog ob daim ntawv: gaskets thiab cov nplhaib sib khi, thiab cov tshuaj o-ntiv nplhaib yog qhov feem ntau siv cov nplhaib sib khi.
Rau cov ntsaws ruaj ruaj, tshuaj lom cov twj tso kua mis tsis tshua muaj siv cov ntsaws ruaj ruaj, thiab tsuas yog siv cov ntsaws ruaj ruaj. Cov ntawv ntim khoom siv tau muab faib ua ib-kawg thiab ob-xaus, ntsuas thiab tsis sib xws. Hom sib npaug yog tsim nyog rau kev sib khi siab siab (feem ntau yog hais txog kev ntxhov siab ntau dua 1. {} Mpa). Muab ob npaug rau cov neeg siv tshuab yog siv rau qhov kub thiab txias, yooj yim-rau-crystallize, viscous, particle-muaj thiab lom volatile media. Muab ob npaug rau cov neeg siv cov khoom siv cais tawm rau hauv kev sib khi noj cov kab noj hniav, thiab feem ntau yog}.}}}}.}} 0.1mpa siab dua li qhov nruab nrab siab.
Sealing Cov Ntaub Ntawv
Cov khoom siv ntawm tshuaj twj tso kua mis zoo li yog fluororubber, thiab polytetrafluoroethylene cov ntaub ntawv siv nyob rau hauv cov ntaub ntawv tshwj xeeb; Cov khoom tsim ntawm cov tshuab sib xyaw ua ke thiab cov ntoo zoo li qub yog qhov tseem ceeb tshaj plaws, thiab nws tsis yog qhov zoo tshaj plaws carbide rau cov cemented carbide. Tus nqi siab yog ib qho, thiab nws tsis yog qhov tsim nyog uas tsis muaj qhov nyuaj txawv ntawm ob, yog li nws yog qhov zoo tshaj los kho lawv txawv raws li cov yam ntxwv ntawm nruab nrab.
(Ceeb Toom: Phau yim teev ntawm API 610 ntawm Asmeskas Petroleum lub koom haum tau cov ncauj lus kom ntxaws ntawm kev teeb tsa cov tshuab sib txuas thiab cov twj tso cai hauv Daim Ntawv Ntxiv D)
05. Cov nyhuv ntawm viscosity
Lub viscosity ntawm nruab nrab muaj qhov cuam tshuam zoo ntawm kev ua haujlwm ntawm lub twj tso kua mis. Thaum lub viscosity nce, lub taub hau nkhaus ntawm lub twj tso kua mis kom tsawg, thiab txaus tus nqi ntawm kev ua haujlwm zoo tshaj plaws, thaum lub zog nce.
Cov tsis muaj nyob rau hauv cov qauv dav dav yog qhov ua tau zoo thaum muaj dej ntshiab. Thaum muaj cov xov xwm voscous, lawv yuav tsum hloov dua siab tshiab (cov kev kho kom haum (cov kab kos txawv tuaj yeem pom nyob hauv cov kab ke hloov pauv hloov tshiab). Rau kev xa tawm ntawm slurries, pastes thiab kiscous kua dej nrog ntau dua viscosity, nws raug pom zoo kom siv lub tshuab kaw ntsia hlau twj. Cov ntsia hlau ib qho yog tsim nyog rau xov xwm nrog viscosity ntawm li 1000000cst.