Particle filtering ib nrab daim npog ntsej muag (6003-2 FFP2)
Cov khoom muaj pes tsawg leeg
Cov txheej txheej saum npoo yog 50g non-woven npuag.Peb txheej yog 45g kub cua paj rwb.Qhov thib peb txheej yog 50g FFP2 lim khoom.Cov txheej sab hauv yog 50g non-woven npuag.
Particle filtering ib nrab daim npog ntsej muag yog ib qho khoom siv tiv thaiv tus kheej uas tsim los kom haum rau lub ntsej muag thiab tiv thaiv cov pa paug los ntawm kev nqus los ntawm tus neeg hnav.Cov cuab yeej no yuav raug hu ua respirator lossis filtering facepiece respirators (FFRs).
Filtration efficiency yog ib txoj hauv kev los ntsuas lub ntsej muag.
Txoj Kev Ntsuas- Lim Efficiency (FE)
FE yog qhov feem ntawm cov khoom uas cuam tshuam los ntawm cov khoom pom.Nws yog ntsuas los ntawm kev sib tw cov khoom siv nrog cov khoom me me, nqa ntawm tus nqi ntws los yog kev tshaj tawm, thiab ntsuas cov particle concentration upstream ntawm cov khoom, khob, thiab downstream ntawm cov khoom, Cdown.Particle nkag mus los ntawm cov khoom siv lim, Pfilter, yog qhov sib piv ntawm cov dej ntws qis mus rau cov dej ntws nce siab, sib npaug los ntawm 100%.FE yog qhov ntxiv ntawm particle nkag mus: FE = 100% - Pfilter.Cov khoom siv lim los ntawm 5% ntawm cov khoom nkag mus (Pfilter = 5%) muaj 95% FE.FE cuam tshuam los ntawm ntau yam, suav nrog cov khoom siv lim;qhov loj, cov duab, thiab tus nqi ntawm cov khoom sib tw, tus nqi airflow, kub thiab av noo, loading, thiab lwm yam.
Nws paub zoo tias FE ntawm cov khoom siv lim yuav sib txawv rau cov khoom sib txawv thiab cov duab.Qhov no yog vim qhov pom tshwm sim los ntawm ntau yam txheej txheem ntawm lub cev - straining lossis sieving, inertial impaction, interception, diffusion, gravitational settling, thiab electrostatic attraction, thiab efficiency ntawm cov txheej txheem no txawv ntawm particle loj.Qhov loj me me uas cov khoom siv lim dej muaj qhov qis tshaj FE yog hu ua feem ntau nkag mus rau qhov me me (MPPS).Qhov zoo tshaj plaws, MPPS yog siv los ntsuas kev ua haujlwm lim dej, vim tias cov lim dej ua haujlwm zoo rau tag nrho lwm cov khoom yuav zoo dua li tau txais nrog MPPS.MPPS sib txawv nrog cov khoom siv lim thiab huab cua tshaj tawm los ntawm lub lim.Cov kev tshawb fawb ntxov tau tshaj tawm MPPS rau lub tshuab ua pa ntawm 0.3 μm, tab sis cov kev tshawb fawb tsis ntev los no tau pom tias MPPS nyob rau hauv 0.04-0.06 μm.
