Cov kua viscosity cuam tshuam li cas sib nqus cuam tshuam
Viscosity txiav txim siab rub lub zog ntawm cov khoom ferrous mus txog lub raj hlau nplaum. Rau cov dej viscosity tsawg (dej, mis nyuj, kua txiv hmab txiv ntoo, viscosity<100 cP), magnetic force overcomes drag when the magnetic energy gradient exceeds 10^5 T²/m. Capture efficiency for 50μm iron particles exceeds 95% at flow velocities below 1.5 m/s. For high-viscosity fluids (syrups, pastes, chocolate, viscosity 1,000-50,000 cP), drag forces increase by 10-100x. To maintain 90% capture efficiency, either reduce flow velocity to 0.3-0.5 m/s or increase magnetic tube surface field from 8,000 Gauss to 12,000 Gauss using N50 grade neodymium.
Rau cov kua nplaum uas muaj kuab paug (piv txwv li, txiv lws suav muab tshuaj txhuam, txiv laum huab xeeb), cov hlau nplaum nrog lub sijhawm nyob ntev ntev (siv cov staggered raj arrays) txhim kho kev cuam tshuam. Qhov tsawg kawg nkaus qhov sib nrug ntawm lub raj yuav tsum yog 2x qhov loj tshaj particle txoj kab uas hla los tiv thaiv kev sib tsoo.
Gauss Values vs. Nto Sib Nqus Field Strength
Gauss nyeem ntsuas qhov sib nqus flux ceev ntawm ib qho chaw tshwj xeeb ntawm lub raj raj cais. Lub raj txheej txheem nruab nrog N42 neodymium hlau nplaum xa 8,000-10,000 Gauss ntawm lub raj nto. Txawm li cas los xij, lub zog hlau nplaum tawg sai sai nrog kev ncua deb: ntawm 5 hli ntawm lub raj nto, Gauss poob rau 2,000-3,000 (kwv yees li 70% txo). Yog li ntawd, rau cov kav dej loj (piv txwv li, 150mm ID), ib qho chaw nruab nrab ntawm lub raj tso rau sab nraud tsis muaj kev tiv thaiv. Txoj kev daws teeb meem: ntau lub raj me me (25 hli OD txhua) tau teeb tsa hauv kab sib chaws, kom ntseeg tau tias txhua qhov dej ntws hla tsis pub dhau 10 hli ntawm qhov chaw hlau nplaum.
Rau cov hmoov qhuav qhuav (cov hmoov nplej, qab zib, txuj lom), cov raj hlau nplaum nrog 12,000 Gauss nto teb thiab raging raking lossis vibratory tu mechanisms raug pom zoo. Hmoov bridging txo qhov kev sib cais zoo; Qhov sib txawv ntawm cov raj yuav tsum tsis pub tshaj 40mm.
Formula rau Matching Pipe Diameter nrog Sib Nqus Tube Spacing
Rau ib lub voj voog uas muaj ib lub raj sib nqus (piv txwv li, 2-5 raj hauv ib lub tsev), txoj cai ntawm tus ntiv tes xoo: qhov siab tshaj plaws ntawm cov dej taw tes mus rau qhov ze tshaj plaws hlau nplaum nto=raj vojvoog + (pipe ID - bundle hnab ntawv)/2. Rau 90% kev ntes ntawm 100μm hlau hais, qhov kev ncua deb yuav tsum tsawg dua lossis sib npaug li 15 hli rau 8,000 Gauss hlab, lossis Tsawg dua lossis sib npaug li 25 hli rau 12,000 Gauss hlab.
Standard configurations peb muab:
| Yeeb Nkab Inner Diameter | Sib Nqus Tube Configuration | Tube OD | Max Unprotected Gap | Pom zoo Flow Velocity |
|---|---|---|---|---|
| 50 hli | 1 cev, | 25 hli | 12.5mm 3 | mus txog 2.0 m / s |
| 100 hli | 3 cev, tri | 25 hli | 20 hli | mus txog 1.2 m / s |
| 150 hli | 5 cev, cross pattern | 25 hli | 18 hli | mus txog 1.0 m / s |
| 200 hli | 7 cev, hex | 25 hli | 15 hli | mus txog 0.8 m / s |
Rau kev siv cov khoom noj tsis huv, txhua lub raj hlau nplaum yuav tsum muaj 0.4μm Ra nto tiav thiab ua los ntawm 316L stainless hlau nrog FDA- cov ntsaws ruaj ruaj.
Routine Maintenance thiab Magnetic Degradation Testing
Neodymium magnets in separators experience gradual demagnetization from temperature (product temperature >80 degree), kev co, thiab corrosion. Standard N42 qib poob 5-10% ntawm Br tshaj 5 xyoo nyob rau hauv ib txwm siv. Kev ntsuam xyuas txhua xyoo uas siv lub ntsuas ntsuas Gauss ntawm qhov chaw siv ruaj khov ntawm txhua lub raj yog yuav tsum tau ua raws HACCP. Hloov chaw pib: thaum nto Gauss poob qis dua 70% ntawm tus nqi qub (piv txwv li, los ntawm 10,000 txog 7,000 Gauss).
Txhawm rau ntxuav, tsis txhob siv cov txhuam hlau los yog cov ntaub txhuam hniav - lawv khawb lub tsho stainless hlau, tsim kom muaj cov kab mob loj hlob. Siv cov txhuam hniav nylon thiab zaub mov- qib detergent. Disassemble thiab tshuaj xyuas cov ntsaws ruaj ruaj txhua 3 lub hlis rau CIP (huv-hauv- qhov chaw) systems.
Rau cov chaw ua zaub mov uas xav tau cov khoom sib nqus sib nqus nrog EHEDG daim ntawv pov thawj thiab 3-A cov qauv huv, thov xa mus rau peb cov khoom sib nqus sib nqus & lim cov khoom ntawm peb lub vev xaib. Peb muab daim ntawv pov thawj lub zog sib nqus nrog txhua chav, suav nrog Gauss ntsuas ntawm tsib ntsiab lus rau ib lub raj.
Txhawm rau sib tham txog koj cov khoom viscosity, ntws tus nqi, thiab lub hom phiaj particle loj, hu rau peb pawg neeg ua haujlwm sib cais. Peb muab kev simulation dawb ntws thiab kev kwv yees kev ua haujlwm zoo.
Cov lus nug nquag
Q: Ntev npaum li cas kuv yuav tsum hloov cov hlau nplaum hauv cov khoom sib cais ua cov roj kub (120 degree)?
A: Rau cov hlau nplaum neodymium, kev khiav hauj lwm ntawm 120℃txo qhov xav tau lub neej mus rau 12-18 lub hlis. Siv SmCo hlau nplaum (max temp 350 degree) hloov. Peb muab SmCo-raws li cov khoom sib cais rau cov ntawv thov kub nrog 5 xyoo lav ntawm demagnetization.
Q: Dab tsi yog qhov tsawg kawg nkaus hlau particle loj koj cov hlau nplaum sib nqus tuaj yeem ntes tau?
A: Rau tus qauv 8,000 Gauss raj, txhim khu kev qha ntes mus rau 30μm hlau hais. Rau 12,000 Gauss raj (N50 qib), ntes mus rau 10μm. Hauv qab 10μm, siv lub siab -gradient magnetic separator (HGMS) nrog steel wool matrix.
Q: Koj puas muab cov khoom siv tshuaj ntsuam xyuas cov hlau nplaum rau hauv -Kev kuaj xyuas kev ua haujlwm hauv tsev?
A: Yog. Peb muab cov khoom siv Gauss meter portable nrog NIST- traceable calibration, ntxiv rau qhov sib nqus saib zaj duab xis. Nqe: $ 450 rau ib qho khoom siv nrog rau cov ntaub ntawv nqa thiab tus neeg siv phau ntawv.
