Xaiv lub twj tso kua mis zoo rau cov tshuaj corrosive tsis yog tsuas yog xaiv lub twj tso kua mis uas txav cov kua; nws yog hais txogxaiv lub twj tso kua mis uas yuav tsis yajthiabyuav tsis xau.
Cov txheej txheem cuam tshuam nrog kev txiav txim siab nruj. Nov yog ib kauj ruam -los ntawm- cov lus qhia kauj ruam los txiav txim qhov raug:
Kauj Ruam 1: Paub Koj Cov Tshuaj (Qhov Kev Ntsuas "Hazard")
Ua ntej saib cov twj tso kua mis, koj yuav tsum txheeb xyuas cov kua dej. Qhov no txiav txim qhovkev ruaj ntseg.
* Corrosiveness:Puas yog acid (pH <7) lossis lub hauv paus (pH> 7)? (xws li Hydrochloric Acid vs. Caustic Soda).
* Toxicity / Flammability:Nws puas txaus ntshai yog tias nws xau? (piv txwv li, chlorine roj yog tuag taus; Benzene yog tawg).
* Viscosity:Puas yog nyias zoo li dej los yog tuab zoo li syrup?
* Khoom:Nws puas muaj cov khoom (slurry) lossis puas huv?
Kauj ruam 2: Xaiv hom twj tso kua mis (Lub "Mechanism")
Raws li cov tshuaj lom neeg tus cwj pwm, xaiv lub twj tso kua mis style:
* Rau nyias, huv, Toxic / Flammable kua:
Kev xaiv:Sib Nqus Tsav Pump lossis Lub Taub Hau Tsav Twj.
Yog vim li cas:foob-tsawg tsim. Tsis muaj kev sib tsoo tshuab txhais tau tias tsis muaj caij nyoog ntawm kev xau. Qhov no yog tus qauv kub rau kev nyab xeeb.
* Rau nyias, Tsis yog - Cov kua dej tsis zoo:
Kev xaiv:Standard centrifugal twj tso kua mis (nrog ib tug zoo mechanical foob).
Yog vim li cas:pheej yig dua thiab yooj yim rau kev tswj xyuas.
* Rau cov kua dej tuab (High viscosity):
Kev xaiv:Gear Pump lossis Progressive Cavity Pump.
Yog vim li cas:Cov twj centrifugal tsis tuaj yeem tsim kom muaj zog txaus los txav cov tshuaj tuab.
* Rau cov kua dej qias neeg (Slurry):
* Kev xaiv:Cua -Operated Ob Qhov Diaphragm (AODD) lossis Peristaltic Pump.
* Yog vim li cas:Lawv tuaj yeem tuav cov khib nyiab yam tsis muaj clogging.
Kauj Ruam 3: Xaiv cov khoom siv ntawm kev tsim kho (Lub "Armor")
Qhov no yog kauj ruam tseem ceeb tshaj plaws. Yog tias koj tau txais qhov yuam kev no, lub twj tso kua mis yuav poob rau hnub lossis teev. Koj yuav tsum sab laj aCorrosion Resistance Chart.
Common Chemical Pump Materials:
1. Thermoplastics (Plastics):
* Polypropylene (PP):Tus nqi qis. Zoo rau acids thiab alkalis. Txwv: Tsawg kub tsis kam.
* PVDF:Muaj zog dua PP. Zoo dua rau qhov kub thiab txias thiab UV teeb.
* PTFE (Teflon):"Tus huab tais" ntawm corrosion kuj. Yuav luag txhua yam (xws li hydrofluoric acid). Siv raws li ib tug liner nyob rau hauv hlau twj los yog raws li lub twj tso kua mis lub cev nws tus kheej.
2. Hlau:
* 316 Stainless hlau:Tus qauv rau cov tshuaj me me thiab khoom noj. Tsis muaj chlorides (dej ntsev).
* Khoom siv: 20Zoo rau sulfuric acid thiab lwm cov kua qaub sib xyaw.
* Hastelloy (C276):Qhov "Super Alloy." Tsis tshua muaj nqi tab sis tuav cov tshuaj aggression tshaj plaws (muaj zog oxidizers, chlorine ntub dej).
* Titanium:Zoo heev rau cov tshuaj chloride thiab dej hiav txwv.
Txoj Cai ntawm Thumb:
* Muaj zog acids (H2SO4, HCl):Siv PTFE, PVDF, lossis Alloy 20.
* Lub hauv paus muaj zog (NaOH):Siv PP, PVDF, lossis 316 SS.
* Dej ntsev / chlorides:Siv Titanium los yog Hastelloy.
* Lwm yam:Tshawb xyuas daim duab.
Kauj Ruam 4: Xaiv lub foob (Yog tias siv lub twj tso kua mis centrifugal)
Yog tias koj tsis tau xaiv lub foob -tsawg (Mag-tsav) twj tso kua mis, koj yuav tsum tiv thaiv tus ncej.
* Single Mechanical Foob:Rau cov uas tsis yog - tshuaj lom neeg.
* Ob Chav Mechanical Foob:Rau cov tshuaj phem. Yog tias thawj lub foob tsis ua tiav, qhov thib ob tuav. Feem ntau yuav tsum muaj lub phiaj xwm dej ntws (API Plan 53 lossis 54) kom lub ntsej muag lub ntsej muag txias.
* Cov khoom siv foob:Lub ntsej muag ntawm lub foob yuav tsum yog tshuaj resistant. Kev sib koom ua ke:Carbon vs Ceramiclos yogSilicon Carbide vs Silicon Carbide.
Kauj Ruam 5: Xam Lub Luag Haujlwm Point (Flow & Pressure)
Koj yuav tsum paub ntau npaum li cas cov kua koj yuav tsum tau txav (GPM / LPM) thiab hnyav npaum li cas koj yuav tsum thawb nws (Lub taub hau / PSI).
Yog tias cov tshuaj yog tuab heev (viscous), koj yuav xav tau lub cev muaj zog ntau dua li qhov koj xav tau rau dej.
Summary Checklist
* Is it Toxic? ->Mag-Tsav.
* Is it Thick? ->Gear Pump.
* Is it Acidic? ->PTFE / PVDF khoom.
* Is it Chloride? ->Hastelloy / Titanium.
* Tshawb xyuas qhov kub thiab txias! (Plastics yaj; Cov ntsaws ruaj ruaj qhuav).
Cov lus qhia zaum kawg:
Ib txwm sab laj covtwj tso kua mis chaw tsim tshuaj paus IOM (Kev teeb tsa, Kev Ua Haujlwm, thiab Kev Saib Xyuas) phau ntawvthiab lawv cov lus qhia tshwj xeeb txog tshuaj tiv thaiv. Yog koj tsis paub meej,tshaj -engineer(xaiv cov khoom kim dua, cov khoom siv tiv taus ntau dua) es tsis muaj kev pheej hmoo ntawm kev xau.