Kev Kho Dej: Yuav Ua Li Cas Ceramic Pumps Lime Slurry Tsis Siv Neeg Nplai Thiab Clogs

Txiv qaub slurry yog ib qho ntawm cov kua dej uas zoo nkaus li yooj yim kom txog thaum koj yuav tsum tau tso nws. Nws hloov mus rau hauv cov dej khib nyiab hauv nroog, chaw nres tsheb fais fab, thiab tshuaj lom neeg tsis zoo. Cov khib nyiab feem ntau yog calcium hydroxide, uas tsis yaj zoo, thiab feem ntau muaj qee cov grit tsis sib xyaw ua ke. Txav mus rau hauv lub twj tso kua mis ntev txaus, thiab cov grit pib nrhiav qhov chaw zaum.

Cov twj hlau muaj lub sijhawm nyuaj nrog qhov no. Sab hauv ntawm lub cam khwb cia hlau los yog stainless twj tso kua mis tsis du qhov twg nws suav. Nyob rau hauv lub microscopic theem, nws yog tag nrho ntawm pits thiab khawb. Cov txiv qaub particle nyob hauv cov chaw ntawd. Ib zaug ob peb lo, calcium carbonate pib tsim rau saum. Cov deposit tau thicker, thiab ua ntej ntev txoj kev yuav nqaim los yog thaiv. Corrosion ua rau nws hnyav dua. Hauv cov slurry uas hloov ntawm acidic thiab alkaline, cov hlau maj mam tawg. Cov khoom siv corrosion sib xyaw nrog cov ntsev calcium, thiab cov nplai hloov mus ua ib yam dab tsi ze rau pob zeb. Cov neeg saib xyuas paub txog qhov niaj hnub: rub lub twj tso kua mis, tsau rau hauv cov kua qaub, nti tawm qhov tsis yaj, muab tso rau hauv qab, thiab tos rau lwm qhov.

Ceramic hloov qhov chaw ntawm slurry kov. Alumina, zirconia, thiab silicon carbide raug rho tawm haujlwm ntawm qhov kub thiab txias. What comes out is a very hard, very dense surface with almost no pores. Silicon carbide nyob ze ntawm pob zeb diamond ntawm cov nplai hardness. Rau cov txiv qaub particle, tsis muaj ntau los tuav. Nws tseem tuaj yeem tsoo phab ntsa, tab sis kev nplaum yog lwm qhov teeb meem.

Nto lub zog tseem ceeb ntawm no. Ceramics feem ntau muaj lub zog qis dua li cov hlau tsis muaj steel. Lub ncov qaumteb qabteb ntawm lub zog yog dab tsi rub scale - ua ntsev mus rau ib qho chaw. Lower polar tivthaiv, tsis muaj zog daim ntawv cog lus. Raws li kev ntsuas hauv chav kuaj, qhov adhesion quab yuam ntawm cov ntsev ntsev ntawm qis -zog ceramic sib raug rau 50% ntawm lawv lub zog ntawm iav lossis hlau. Nyob rau hauv cov ntaub ntawv calcium carbonate yog deposited, nws yog feem ntau tso raws li ib tug xoob porous txheej es tsis yog ib tug ntom plhaub. Cov slurry ntws ncig tuaj yeem feem ntau cheb ib qho kev tso nyiaj tawm ua ntej lawv tuaj yeem tsim teeb meem.

Geometry pab ib yam. Plunger thiab diaphragm twj feem ntau muaj nruj clearances nyob ib ncig ntawm lub rooj zaum valve thiab pob. Qhov ntawd yog qhov uas cov khoom sib sau ua ntej. Cov twj tso kua mis ceramic feem ntau siv txoj hauv kev dav dua thiab tsawg dua ntawm cov hnab ntim nruj. Qee cov qauv tsim kuj siv lub plunger ua tus scraper. Thaum nws txav mus, nws ntug wipes lub liner. Mos deposits tau raug thawb tawm ua ntej lawv kho rau hauv cov nplais nyuaj.

Tsis muaj qhov no txwv cov chemistry. Calcium hydroxide tseem reacts nrog carbon dioxide los tsim calcium carbonate. Cov dej tseem evaporates thiab tawm cov khoom yaj hauv qab. Lub twj tso kua mis ceramic tsis tiv thaiv qhov ntsuas los ntawm kev sib sau. Nws tsuas yog ua rau phab ntsa yog qhov chaw tsis zoo rau nplai rau thauj tog rau nkoj. Xav txog cov daus ntawm txoj kev taug kev ntxhib piv rau lub iav pane. Ob leeg tau daus. Ib tug tuav nws, lwm tus los nws.

Kev kaw yog lwm qhov tsis muaj zog rau hlau. Trapped slurry dries nyob rau hauv lub twj tso kua mis chamber thiab hardens. Thaum pib, cov chunks tuaj yeem kaw lub rotor. Ceramic nto tsis tuav dej los yog cov seem kom nruj, yog li cov dej yaug tom qab kaw mus ntxiv. Rau cov tshuab uas pib thiab nres txhua hnub, ib leeg tuaj yeem cawm tau ntau txoj kev tu siab.

Ceramic muaj nws tus kheej txwv. Nws yog nkig. Cov khib nyiab loj hlau lossis pob zeb hauv slurry tuaj yeem tawg nws. Feem ntau cov kev teeb tsa muab cov lim dej los yog grit ntxiab ntws. Qhov ntawd yog kev xyaum zoo lawm, tab sis nrog ceramic kev tiv thaiv yuav tsum muaj kev vam meej. Hlau tuaj yeem tsoo thiab mus ntxiv. Ceramic ua tsis tau.

Hauv kev pabcuam tiag tiag, silicon carbide wetted qhov feem ntau kav ntev li plaub zaug ntev dua hlau. Cov nqi kho mob poob qis, tab sis lub sijhawm ua haujlwm yog qhov loj dua. Txhua cov kua qaub ntxuav yog kaw. Txhua qhov kev kaw yog ploj mus rau lub sijhawm kho thiab, ntawm cov chaw tsim hluav taws xob lossis cov chaw dej khib nyiab, muaj peev xwm ua raws li kev pheej hmoo. Tsawg dua teardowns txhais tau tias tsawg dua qhov yuav ua rau muaj qee yam tsis raug.

Tias yog vim li cas cov twj ceramics tau txav los ntawm cov khoom tshwj xeeb mus rau cov qauv kev xaiv rau cov kua qaub slurry. Qhov hnav tsis kam yog qhov zoo. Qhov hloov pauv tiag tiag yog qhov chaw. Scale muaj lub sijhawm nyuaj rau rub. Thaum nws tuav tsis tau, nws tsim tsis tau. Thaum nws tsim tsis tau, txoj kab yuav qhib thiab lub twj tso kua mis tseem khiav.