Txoj cai ua haujlwm ntawm Diatomite Filter Aid
Lub luag haujlwm ntawm cov khoom siv lim dej yog hloov pauv qhov xwm txheej sib sau ua ke ntawm cov khoom me me, yog li hloov pauv qhov loj me ntawm cov khoom me me hauv cov lim dej. Cov khoom siv lim dej diatomite feem ntau yog tsim los ntawm SiO2 uas ruaj khov, nrog ntau lub qhov me me sab hauv, tsim ntau yam qauv tawv. Thaum lub sijhawm lim dej, lub ntiaj teb diatomaceous thawj zaug tsim cov khoom siv lim dej porous (pre-coating) ntawm lub phaj lim dej. Thaum lub lim dej hla dhau cov khoom siv lim dej, cov khoom khov kho hauv cov khoom ncua tsim cov xwm txheej sib sau ua ke, thiab qhov loj me hloov pauv. Cov khoom tsis huv ntawm cov khoom loj raug ntes thiab khaws cia rau ntawm qhov chaw ntawm cov khoom nruab nrab, tsim cov txheej faib me me. Lawv txuas ntxiv thaiv thiab ntes cov khoom me me uas muaj qhov loj me zoo sib xws, maj mam tsim cov ncuav mog qab zib lim dej nrog qee qhov qhov me me. Thaum kev lim dej nce qib, cov khoom tsis huv nrog cov khoom me me maj mam nkag mus rau hauv cov khoom siv lim dej diatomaceous thiab raug cuam tshuam. Vim tias lub ntiaj teb diatomaceous muaj porosity li ntawm 90% thiab thaj chaw loj tshwj xeeb, thaum cov khoom me me thiab cov kab mob nkag mus rau hauv cov qhov sab hauv thiab sab nraud ntawm lub lim dej pab, lawv feem ntau raug cuam tshuam vim yog kev nqus thiab lwm yam laj thawj, uas tuaj yeem txo 0.1 μ. Kev tshem tawm cov khoom me me thiab cov kab mob ntawm m tau ua tiav qhov kev lim dej zoo. Qhov ntau npaum li cas ntawm cov lim dej pab feem ntau yog 1-10% ntawm cov khoom khov kho raug cuam tshuam. Yog tias qhov ntau npaum li cas ntau dhau, nws yuav cuam tshuam rau kev txhim kho ntawm kev lim dej ceev.
Cov nyhuv lim dej
Cov txiaj ntsig ntawm kev lim dej ntawm Diatomite Filter Aid feem ntau yog ua tiav los ntawm peb qhov kev ua hauv qab no:
1. Kev tshuaj ntsuam xyuas
Qhov no yog qhov cuam tshuam ntawm kev lim dej saum npoo av, qhov twg thaum cov kua dej ntws los ntawm lub ntiaj teb diatomaceous, cov qhov hws ntawm lub ntiaj teb diatomaceous me dua li qhov loj me ntawm cov khoom tsis huv, yog li cov khoom tsis huv tsis tuaj yeem hla dhau thiab raug cuam tshuam. Cov nyhuv no hu ua sieving. Qhov tseeb, qhov saum npoo ntawm lub ncuav mog qab zib lim dej tuaj yeem suav tias yog qhov chaw sieve nrog qhov nruab nrab qhov loj me. Thaum lub cheeb ntawm cov khoom khov kho tsis tsawg dua (lossis me ntsis tsawg dua) lub cheeb ntawm lub ntiaj teb diatomaceous, cov khoom khov kho yuav raug "tshuaj ntsuam" tawm ntawm qhov kev ncua, ua lub luag haujlwm hauv kev lim dej saum npoo av.
2. Qhov tob ntawm qhov cuam tshuam
Qhov tob tob yog qhov khaws cia ntawm kev lim dej tob. Hauv kev lim dej tob, cov txheej txheem sib cais tsuas yog tshwm sim hauv nruab nrab. Qee cov khoom me me uas hla dhau ntawm qhov chaw ntawm lub ncuav mog qab zib lim tau thaiv los ntawm cov channel microporous winding hauv lub ntiaj teb diatomaceous thiab cov qhov me me hauv lub ncuav mog qab zib lim. Cov khoom me me no feem ntau me dua li cov micropores hauv lub ntiaj teb diatomaceous. Thaum cov khoom me me sib tsoo nrog phab ntsa ntawm cov channel, nws muaj peev xwm cais tawm ntawm cov kua ntws. Txawm li cas los xij, seb lawv puas tuaj yeem ua tiav qhov no nyob ntawm qhov sib npaug ntawm lub zog inertial thiab kev tiv thaiv ntawm cov khoom me me. Qhov kev cuam tshuam thiab kev tshuaj ntsuam no zoo sib xws hauv qhov xwm txheej thiab koom nrog kev ua haujlwm kho tshuab. Lub peev xwm los lim tawm cov khoom khov kho tsuas yog cuam tshuam nrog qhov loj me thiab cov duab ntawm cov khoom khov kho thiab qhov hws.
3. Cov nyhuv adsorption
Qhov cuam tshuam adsorption txawv kiag li ntawm ob lub tshuab lim dej uas tau hais los saum toj no, thiab qhov cuam tshuam no tuaj yeem pom tau tias yog electrokinetic attraction, uas feem ntau nyob ntawm cov khoom ntawm cov khoom khov thiab diatomaceous av nws tus kheej. Thaum cov khoom me me nrog cov qhov me me sab hauv sib tsoo nrog qhov chaw ntawm lub ntiaj teb porous diatomaceous, lawv raug nyiam los ntawm cov nqi sib txawv lossis tsim cov saw hlau los ntawm kev sib koom ua ke ntawm cov khoom me me thiab lo rau lub ntiaj teb diatomaceous, txhua yam uas koom nrog adsorption. Qhov cuam tshuam adsorption yog qhov nyuaj dua li ob qho thawj zaug, thiab feem ntau ntseeg tias qhov laj thawj vim li cas cov khoom khov nrog cov qhov me me raug cuam tshuam yog vim:
(1) Cov zog sib txuas ntawm cov molecule (tseem hu ua van der Waals attraction), suav nrog kev sib cuam tshuam dipole tas mus li, kev sib cuam tshuam dipole uas raug tsim, thiab kev sib cuam tshuam dipole tam sim ntawd;
(2) Qhov muaj peev xwm ntawm Zeta;
(3) Cov txheej txheem pauv ion.
Lub sijhawm tshaj tawm: Plaub Hlis-01-2024