Kuvandudzwa kweindasitiri yemazuva ano kwakaisa zvichemo zvinowedzera pane zvakatipoteredza zvekuedza, kutsvagisa uye kugadzira. Nzira huru yekuzadzisa ichi chinodiwa ndeyekushandisa zvakanyanya mafirita emhepo mune yakachena air conditioning system. Pakati pavo, HEPA uye ULPA mafirita ndiyo yekupedzisira dziviriro yeguruva zvidimbu zvinopinda mukamuri rakachena. Kuita kwayo kwakanangana neiyo yakachena kamuri level, iyo inokanganisa maitiro uye chigadzirwa chemhando. Naizvozvo, zvine zvazvinoreva kuita ongororo yekuyedza pane sefa. Kupikiswa kwekuita uye kusefa kwemasefa maviri kwakaenzaniswa nekumhanya kwemhepo kwakasiyana nekuyera kusefa kwegirazi fiber sefa uye PTFE sefa ye0.3 μm, 0.5 μm, 1.0 μm PAO zvidimbu. Mhedzisiro yacho inoratidza kuti kumhanya kwemhepo chinhu chakakosha chinokanganisa kusefa kweHEPA mafirita emhepo. Iyo yakakwirira yekumhanya kwemhepo, kuderera kwesefa inoshanda, uye mhedzisiro yacho inova pachena kune PTFE mafirita.
Mazwi akakosha:HEPA mhepo sefa; Kuramba kuita; kusefa kuita; PTFE sefa bepa; girazi fiber filter bepa; girazi fiber sefa.
Nhamba yeCLC:X964 Gwaro rekuzivikanwa kodhi: A
Nekuenderera mberi kwekusimudzira kwesainzi uye tekinoroji, kugadzirwa uye kuvandudzwa kwezvigadzirwa zvemazuva ano zvemaindasitiri zvave kuwedzera kudiwa kwehutsanana hwemukati hwemhepo. Kunyanya, microelectronics, zvekurapa, makemikari, biological, kugadzira chikafu uye mamwe maindasitiri anoda miniaturization. Kurongeka, kuchena kwepamusoro, hukuru hwepamusoro uye kuvimbika kwakanyanya kwemukati nharaunda, iyo inoisa yakakwirira uye yepamusoro zvinodiwa pakuita kweHEPA mhepo sefa, saka magadzirirwo eHEPA sefa kuti asangane nezvinodiwa nevatengi chave chido chekukurumidzira chevagadziri. Imwe yematambudziko akagadziriswa [1-2]. Zvinonyatsozivikanwa kuti kuramba kuita uye kusefa kunyatsoshanda kwesefa zviratidzo zviviri zvakakosha zvekuongorora sefa. Iri bepa rinoedza kuongorora kusefa kuita uye kuramba kuita kweHEPA mhepo sefa yezvakasiyana mafirita zvinhu nezviyedzo [3], uye zvimiro zvakasiyana zveimwe sefa zvinhu. Iko kusefa kuita uye kupikisa zvimiro zvesefa zvinopa hwaro hwe theoretical kune mugadziri wesefa.
1 Kuongorora nzira yekuongorora
Kune nzira dzakawanda dzekuona HEPA mafirita emhepo, uye nyika dzakasiyana dzine mwero wakasiyana. Muna 1956, US Military Commission yakagadzira USMIL-STD282, HEPA air filter test standard, uye iyo DOP nzira yekuyedza kuita basa. Muna 1965, British standard BS3928 yakagadzwa, uye nzira yesodium flame yekuonekwa kwayo yakashandiswa. Muna 1973, European Ventilation Association yakagadzira iyo Eurovent 4/4 standard, iyo yakatevera iyo sodium flame yekuona nzira. Gare gare, American Society for Environmental Testing uye Filter Efficiency Sayenzi yakaunganidza nhevedzano yemwero yakafanana yenzira dzakakurudzirwa dzekuyedza, dzese dzichishandisa DOP caliper kuverenga nzira. Muna 1999, Europe yakamisa BSEN1822 yakajairwa, inoshandisa yakanyanya kujeka particle size (MPPS) kuona kusefa kushanda zvakanaka [4]. Iyo yekuona chiyero cheChina inotora iyo sodium murazvo nzira. Iyo HEPA air filter performance yekuona system inoshandiswa muchiyedzo ichi inogadzirwa zvichibva paUS 52.2 standard. Nzira yekuona inoshandisa nzira yekuverenga caliper, uye aerosol inoshandisa PAO particles.
1. 1 chiridzwa chikuru
Chiyedzo ichi chinoshandisa zvimedu zviviri zvekuverengera, zviri nyore, zviri nyore, zvinokurumidza uye zvinonzwisisika zvichienzaniswa nemamwe maturusi ekuyedza midziyo [5]. Mabhenefiti ari pamusoro eiyo particle counter anoita kuti zvishoma nezvishoma itsive dzimwe nzira uye ive nzira huru yekuyedza yekuisa particle concentration. Vanogona kuverenga zvese nhamba yezvimedu uye kugovera saizi yechikamu (kureva, kuverenga kuverenga), inova ndiyo yakakosha mudziyo wechiyedzo ichi. Sampling kuyerera mwero ndeye 28.6 LPM, uye yayo isina kabhoni vacuum pombi ine hunhu hwekudzika ruzha uye kuita kwakagadzikana. Kana iyo sarudzo yakaiswa, tembiricha uye humidity pamwe nekumhanya kwemhepo zvinogona kuyerwa uye sefa inogona kuyedzwa.
Iyo yekuona sisitimu inoshandisa aerosols ichishandisa PAO zvimedu seguruva rinofanira kusefa. Isu tinoshandisa aerosol jenareta (Aerosol zvizvarwa) zveTDA-5B modhi inogadzirwa muUnited States. Mutsara wezvinoitika ndeye 500 - 65000 cfm (1 cfm = 28.6 LPM), uye chiyero ndeye 100 μg / L, 6500 cfm; 10 μg / L, 65000 cfm.
1. 2 imba yakachena
Kuti uvandudze huchokwadi hwekuyedza, marabhoritari ye10,000-level yakagadzirwa nekushongedzwa zvinoenderana neUS Federal Standard 209C. Iyo yekuputira pasi inoshandiswa, iyo inoratidzirwa nezvakanaka zve terrazzo, kupfeka kusagadzikana, kuvhara zvakanaka, kushanduka uye kuvakwa kwakaoma. Izvo zvinhu ndeye epoxy lacquer uye madziro akagadzirwa akaungana akachena kamuri siding. Imba yacho ine 220v, 2 × 40w kucheneswa 6 mwenje uye yakarongedzwa zvinoenderana nezvinodiwa zvekuvhenekera uye midziyo yemumunda. Imba yakachena ine 4 yepamusoro mhepo yekubuda uye 4 air return ports. Imba yekugezera yemhepo yakagadzirirwa kune imwechete yakajairwa kubata bata. Iyo nguva yekugezesa yemhepo ndeye 0-100s, uye kumhanya kwemhepo kwechero inogadziriswa inotenderera yemhepo vhoriyamu nozzle yakakura kupfuura kana yakaenzana ne20ms. Nekuti nzvimbo yekamuri yakachena ndeye <50m2 uye vashandi vari <5 vanhu, kubuda kwakachengeteka kunopihwa yekamuri yakachena. Iyo HEPA sefa yakasarudzwa ndeye GB01 × 4, vhoriyamu yemhepo i1000m3/h, uye kusefa kwakanaka kwakakura kupfuura kana kuenzana ne0.5μm uye 99.995%.
1. 3 miedzo yekuenzanisa
Mhando dzegirazi fiber sefa ndeidzi: 610 (L) × 610 (H) × 150 (W) mm, baffle type, 75 wrinkles, saizi 610 (L) × 610 (H) × 90 (W) Mm, ine 200 pleats, PTFE sefa saizi 480 × 0 × 7 mm (H) baffle type, ine 100 wrinkles.
2 Nheyo dzinokosha
Nheyo yekutanga yebhenji rekuyedza ndeyekuti fan inofuridzirwa mumhepo. Sezvo HEPA/UEPA yakashongedzerwawo neHEPA mhepo sefa, zvinogona kutariswa kuti mhepo yave mweya wakachena usati wasvika kune yakaedzwa HEPA/UEPA. Chishandiso ichi chinoburitsa PAO zvimedu mupombi kuti igadzire inodiwa guruva-ine gasi uye inoshandisa laser particle counter kuona iyo particle concentration. Iyo gasi rine guruva rinobva rayerera nemuyakaedzwa HEPA/UEPA, uye guruva remukati memhepo rakasefa neHEPA/UEPA rinoyerwa zvakare uchishandisa laser particle counter, uye guruva remhepo sefa isati yaenzaniswa uye mushure mekuenzanisa, zvichibva zvaona HEPA/UEPA. Sefa kuita. Uyezve, maburi esampling anorongwa pamberi uye mushure mesefa, uye kuramba kwemhepo yega yega kumhanya kunoedzwa nekushandisa tilt micro pressure gauge pano.
3 sefa kuramba kuita kuenzanisa
Kuramba maitiro eHEPA ndechimwe chezvinhu zvakakosha zveHEPA. Pasi pechikonzero chekusangana nekubudirira kwezvinodiwa nevanhu, maitiro ekupikisa ane chekuita nemutengo wekushandisa, kuramba kudiki, kushandiswa kwesimba kudiki, uye mutengo unochengetwa. Naizvozvo, kupikisa kuita kwesefa kwave kunetseka. Chimwe chezviratidzo zvakakosha.
Zvinoenderana neayedzo yekuyera data, hukama pakati peavhareji yekumhanya kwemhepo yeaviri akasiyana masisitimu mafirita egirazi faibha uye PTFE sefa uye mutsauko wekumanikidza wesefa unowanikwa.Hukama hunoratidzwa mumufananidzo 2:
Iyo inogona kuoneka kubva muyedzo data iyo sezvo mhepo inomhanyisa ichiwedzera, kuramba kwesefa kunowedzera mutsara kubva pasi kusvika kumusoro, uye mitsetse miviri yakatwasuka yemafirita maviri egirazi fiber inopindirana. Zviri nyore kuona kuti kana mhepo yekusefa iine 1 m/s, kuramba kwegirazi fiber sefa kunenge kakapetwa kana kupfuura kwePTFE sefa.
Kuziva nzvimbo yefirita, hukama pakati pekumhanya kwechiso uye mutsauko wekudzvanywa kwesefa hunogona kutorwa:
Iyo inogona kuoneka kubva muyedzo data iyo sezvo mhepo inomhanyisa ichiwedzera, kuramba kwesefa kunowedzera mutsara kubva pasi kusvika kumusoro, uye mitsetse miviri yakatwasuka yemafirita maviri egirazi fiber inopindirana. Zviri nyore kuona kuti kana kusefa kwemhepo kumhanya kuri 1 m/s, kuramba kwegirazi fiber sefa kunenge kakapetwa kana kupfuura kwePTFE filte.
Kuziva nzvimbo yefirita, hukama pakati pekumhanya kwechiso uye mutsauko wekudzvanywa kwesefa hunogona kutorwa:
Nekuda kwemusiyano uripo pakati pekumhanya kwepamusoro pemhando mbiri dzemafirita uye mutsauko wekudzvanya kwesefa yemapepa maviri esefa, kuramba kwesefa ine 610 × 610 × 90mm pamwe chete pamusoro pekumhanya kwakakwira kupfuura yakatarwa 610 ×. Kupokana kweiyo 610 x 150mm sefa.
Zvisinei, zviri pachena kuti panguva imwechete yepamusoro kumhanya, kushorwa kwegirazi fiber filter yakakwirira kudarika kushorwa kwePTFE. Zvinoratidza kuti PTFE yakakwirira kune girazi fiber sefa maererano nekuramba kuita. Kuti uwedzere kunzwisisa maitiro egirazi fiber sefa uye PTFE kuramba, kumwe kuedza kwakaitwa. Kunyatso dzidza kupokana kwemapepa maviri esefa sezvo mhepo yekusefa inochinja, mhinduro dzekuyedza dzinoratidzwa pazasi:
Izvi zvinowedzera kusimbisa mhedziso yapfuura kuti kushorwa kwegirazi fiber filter paper yakakwirira kudarika yePTFE pasi pemhepo yakafanana [6].
4 sefa sefa kuita kuenzanisa
Zvinoenderana nemamiriro ekuyedza, kusefa kwesefa kwezvimedu zvine saizi ye0.3 μm, 0.5 μm, uye 1.0 μm pakumhanya kwemhepo kwakasiyana kunogona kuyerwa, uye chati inotevera inowanikwa:
Zviripachena, kusefa kwemafirita maviri egirazi mafirita e1.0 μm zvidimbu zvakasiyana-siyana zvekumhanya kwemhepo i100%, uye kusefa kwakanaka kwe0.3 μm uye 0.5 μm zvimedu zvinodzikira nekuwedzera kwekumhanya kwemhepo. Zvinogona kuonekwa kuti kusefa kwesefa kune zvimedu zvakakura kwakakwirira kudarika izvo zviduku zviduku, uye kushandiswa kwesefa kwe610 × 610 × 150 mm sefa kwakakwirira kune sefa yezvakatsanangurwa 610 × 610 × 90 mm.
Uchishandisa nzira imwechete, girafu rinoratidza hukama pakati pekusefa kwe480 × 480 × 70 mm PTFE sefa sebasa rekumhanya kwemhepo rinowanikwa:
Kuenzanisa Fig. 5 uye Fig. 6, iyo filtration effect ye 0.3 μm, 0.5 μm particle glass filter iri nani, kunyanya kune 0.3 μm guruva kusiyana kwekuita. Iko kusefa kwezvikamu zvitatu pa 1 μm zvimedu zvaive 100%.
Kuti uwedzere kunyatsofananidza kusefa kwegirazi fiber sefa uye iyo PTFE sefa zvinhu, bvunzo dzekuita sefa dzakaitwa zvakananga pamapepa maviri efirita, uye inotevera chati yakawanikwa:
Chati iri pamusoro inowanikwa nekuyera filtration effect yePTFE uye girazi fiber filter paper pa 0.3 μm particles pamhepo yakasiyana-siyana yemhepo [7-8]. Zviripachena kuti kusefa kwakanaka kwePTFE kusefa bepa kwakadzikira pane kwegirazi fiber sefa bepa.
Tichifunga nezvekupikisa zvivakwa uye kusefa zvinhu zvesefa zvinhu, zviri nyore kuona kuti iyo PTFE sefa zvinhu zvakanyanya kufanirwa kugadzira coarse kana sub-HEPA mafirita, uye iyo girazi fiber sefa zvinhu inonyanya kukodzera kugadzira HEPA kana Ultra-HEPA mafirita.
5 Mhedziso
Tarisiro yemafirita akasiyana-siyana anoongororwa nekuenzanisa zvimiro zvekupikisa uye kusefa zvimiro zvePTFE mafirita ane girazi fiber mafirita. Kubva pakuedza tinogona kutora mhedziso yekuti kumhanya kwemhepo chinhu chakakosha chinokanganisa kusefa kweHEPA mhepo sefa. Iyo yakakwirira yemhepo inomhanya, yakaderera kusefa kwesefa, iyo inonyanya kuoneka mhedzisiro paPTFE sefa, uye yakazara Iyo PTFE sefa ine yakaderera filtration effect pane fiberglass filter, asi kuramba kwayo kwakaderera kupfuura kwegirazi fiber filter. Naizvozvo, iyo PTFE sefa zvinhu inonyanya kukodzera kugadzira yakaomesesa kana yakaderera-yakakwirira-inoshanda sefa, uye girazi fiber sefa zvinhu zvinonyanya kukodzera kugadzirwa. Sefa inoshanda kana yakanyanyisa. Iyo girazi faibha HEPA sefa ine yakatarwa ye610 × 610 × 150mm yakadzikira pane iyo 610 × 610 × 90mm girazi faibha HEPA sefa, uye kusefa kuita kuri nani pane iyo 610 × 610 × 90mm girazi fiber HEPA sefa. Parizvino, mutengo wakachena PTFE sefa zvinhu wakakwira kupfuura wegirazi fiber. Nekudaro, kana ichienzaniswa negirazi fiber, PTFE ine nani tembiricha kuramba, corrosion resistance uye hydrolysis pane girazi fiber. Naizvozvo, zvinhu zvakasiyana zvinofanirwa kutariswa pakugadzira sefa. Batanidza hunyanzvi hwekuita uye kuita kwehupfumi.
References:
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Nguva yekutumira: Jan-06-2019