Mumaindasitiri akadai sekurapa mvura yakasviba yemumaguta, migodhi, uye kugadzirisa makemikari, kuyera kuyerera kwemvura yakaoma—ingava tsvina yakasanganiswa nemarara kana slurry yemineral inokwesha—kuda maturusi akagadzirirwa mamiriro ezvinhu akaoma aya. Pakati pema ultrasonic flowmeters, matekinoroji maviri makuru anoonekwa: Doppler uye transit-time models. Kunyange zvazvo ese ari maviri achivimba nemafungu eruzha pakuyera, misimboti yawo mikuru, simba, uye miganhu yakasiyana zvakanyanya, zvichiita kuti (kusarudza) kuve kwakakosha pakushanda kwakavimbika mukushandiswa kwemvura yakasviba neslurry. Kunzwisisa misiyano iyi kunoita kuti vashandi vadzivise kusawirirana kunodhura, kuderedza nguva yekushanda, uye kuchengetedza data rakarurama kuti ritevedzerwe uye rishande zvakanaka.
Nheyo dzeKushanda Dzinokosha: Hwaro hweMusiyano
Musiyano mukuru uripo pakati peDoppler netransit-time flowmeters uri pakuti dzinoshanda sei nemvura iri kuyerwa—kunyanya maererano nezvidimbu zvakamiswa kana mabubbles, ayo ari kwose kwose mumvura yakasviba uye slurry.
MaDoppler flowmeters anoshandisa Doppler effect, chiitiko apo ruzha runochinja-chinja kana ruchiratidza zvinhu zviri kufamba. Heino mashandiro azvinoita: Transducer inosungirirwa papombi yekunze inoburitsa mafungu e ultrasonic ane frequency yepamusoro (0.5–5 MHz) kuburikidza nemadziro epombi ichipinda mumvura. Mafungu aya anosvetuka kubva pazvidimbu zvakamiswa, mabubbles, kana turbulence murwizi; zvidimbu zvinofamba zvinoshandura frequency yemafungu anoratidzwa (kudzvanya mafungu kana zvidimbu zvikafamba zvichienda kune transducer, zvichiatambanudza kana zvikafamba). Chishandiso che signal chemita chinoverenga frequency shift iyi, chobva chashandisa dhayamita yepombi uye fluid properties kuti chiwane flow rate. Chinonyanya kukosha ndechekuti, maDoppler models anoda zvidimbu kana mabubbles kuti ashande—haakwanise kuyera mvura yakachena, isina zvidimbu.
Kusiyana neizvi, ma "transit-time flowmeters" anoyera nguva inotora kuti mafungu e ultrasonic afambe nemumvura pachayo, kwete kubva muzvidimbu zvinoratidzwa. Anoshandisa ma "transducers" maviri (rimwe riri kumusoro, rimwe riri pasi) akaiswa papombi. Chiratidzo chinofamba kubva pa "upstream transducer" kuenda kune iri pasi, chichikwira nekuyerera kwemvura (kuderedza nguva yekufamba), uye chimwe chiratidzo chinofamba kubva pasi kuenda kumusoro, chichishanda nekufamba (kuwedzera nguva yekufamba). Mita inoverenga musiyano wenguva pakati pezviratidzo zviviri izvi; musiyano uyu unoenderana zvakananga nekumhanya kwemvura, iyo inozoshandurwa kuita flow rate. Kusiyana nema "Doppler models", ma "transit-time meters" anovimba nemvura kuti atumire mafungu enzwi—anoshanda zvakanaka nemvura yakachena, yakafanana uye anotambura nehuwandu hwakawanda hwezvinhu zvinoparadzira kana kupinza zviratidzo.
Kuenderana kwemvura: Chinhu Chinobatsira Pakugadzira kana Kuputsa Mvura Yakasviba & Slurry
Pakushandisa mvura yakasviba netsvina, kuumbwa kwemvura ndiyo chinhu chinonyanya kukosha pakusarudza pakati pematekinoroji maviri aya.
MaDoppler flowmeters anonyanya kunaka nemvura "dzakasviba" - rudzi chairwo rwunowanikwa mumvura yakasviba uye masisitimu ekutsvedza. Mvura yakasviba yemuguta, semuenzaniso, ine marara eorganic, grit, uye mabubble emhepo; slurry dzemumigodhi dzinotakura zvidimbu zvinogumbura senge marasha, limestone, kana simbi; uye slurry dzemumaindasitiri (semuenzaniso, mukugadzira chikafu kana kugadzira makemikari) dzinogona kusanganisira zvinhu zvakasimba senge catalyst fines kana pulp. Izvi zvikamu zvinoshanda se "reflectors" yemafungu eDoppler meter, zvichiita kuti chiratidzo chishande zvakanaka. Kunyangwe slurry dzakasimba kwazvo (semuenzaniso, simende paste kana musanganiswa wefetereza) hadzina dambudziko, sezvo dhizaini yemeter isingapindi mvura inodzivirira kusangana nemvura - kubvisa kuvharika kana kupera kubva kuzvinhu zvakasimba zvinogumbura.
Zvisinei, ma "transit-time flowmeters" anonetsekana nemvura dzine zvidimbu zvakawanda. Zvinhu zvakasimba zvakasungirirwa zvinoparadzira mafungu e ultrasonic, zvichideredza simba kana kukanganisa chiratidzo chiri pakati pema "transducers" maviri. Mumvura yakasviba ine huwandu hwakawanda hwemarara, izvi zvinogona kutungamira mukuverengwa kusina kurongeka kana kurasikirwa kwechiratidzo chose. Kune slurry dzine huwandu hwakasimba huri pamusoro pe1–2% (nehuwandu), mamita e "transit-time" anowanzo kundikana kuchengetedza kururama, sezvo zvidimbu zvichivhara nzira yeruzha. Zvakakodzera zviri nani kune "mvura yakachena" yetsvina - senge mvura yakasviba yakarapwa ine zvidimbu zvishoma - kana maitiro apo mvura inoseferwa isati yayerwa. Mumvura yakasviba isina kucheneswa kana kushandiswa kweslurry yakawanda, mamodheru e "transit-time" anogona kuisa njodzi yekuongororwa kana kutsiviwa kakawanda nekuda kwekukanganiswa kwechiratidzo.
Kururama, Kuisa, uye Kugadzirisa: Kuchinjana Kunoshanda
Kupfuura kuenderana kwemvura, zvinhu zvinoshanda zvakaita sekururama, nyore kuisa, uye zvinodiwa pakugadzirisa zvinoparadzanisa matekinoroji maviri aya mukushandiswa kwemvura yakasviba netsvina.
Kururama
MaDoppler flowmeters anowanzo kupa kurongeka kwe ±1–3% yekuverenga kwezvinwiwa zvine zvidimbu—zvakakwana pakushandiswa kwemvura yakasviba netsvina, uko kutamiswa kwakanyatsonaka kwekuchengetedza (semuenzaniso, kubhadharisa mafuta) kushoma pane kutarisa mashandiro. Kurongeka kwawo kunoramba kwakasimba kunyangwe paine huwandu hwezvimedu zvinoshanduka (chero bedzi chiyero chidiki che ~10 ppm chasvika) uye mwero wemvura yakaderera (kusvika ku 0.1 m/s), zvichiita kuti zvive zvakanaka pakutarisa slurry dzinofamba zvishoma nezvishoma mumapaipi ekuchera kana nzira dzemvura yakasviba dzisingafambi zvakanyanya.
Michina yekuyerera kwemvura panguva yekufamba inopa kunyatsojeka kwakanyanya (± 0.5–1% yekuverenga) asi chete mumvura yakachena. Mumvura yakasviba kana matope, kunyatsojeka kwayo kunoderera nekukurumidza nekuwedzera kwehuwandu hwezvinhu zvidiki. Semuenzaniso, mutsvina isina kubikwa ine 5% yezvakasimba, muganhu wekukanganisa kwemita yenguva yekufamba unogona kukwira kusvika ± 5% kana kupfuura - zvisingagamuchirwi kune maitiro anotungamirirwa nekutevedzera mitemo senge kutarisa kuburitswa kwemvura yakasviba.
Kuiswa
Matekinoroji ese ari maviri anoshandisa magadzirirwo e-clamp-on (asingapindi), inova mukana mukuru wemasisitimu emvura yakasviba uye slurry—hapana kuchekwa kwepombi, kusungirirwa, kana kuvharwa kunodiwa, zvichideredza nguva yekuisa kubva pamazuva (emamita ari mukati) kusvika kumaawa. Zvisinei, maDoppler flowmeters ane zvipingamupinyi zvishoma zvekuisa: anoshanda nezvinhu zvakawanda zvepombi (simbi, PVC, kongiri) uye ukobvu, sezvo chiratidzo chayo chinongoda kusvika nekuratidza zvidimbu. Anoshivirirawo mamiriro epombi asingawirirane (semuenzaniso, ngura diki kana kukura), izvo zvinowanzoitika mumapombi emvura yakasviba.
Michina yekuyerera kwemvura panguva yekufamba kwemvura inoda kuiswa kwakanyatsojeka: madziro epombi anofanira kunge akatsetseka uye akafanana kudzivirira kukanganisa kwechiratidzo, uye daro riri pakati pematransducers (akaverengerwa zvichienderana nedhayamita yepombi nezvinhu) rinofanira kunge rakanyatsojeka. Kukura kana ngura mukati mepombi zvinogona kuvhara mafungu eruzha, zvichiita kuti kucheneswa nguva nenguva—dambudziko rakawedzerwa muhurongwa hwemvura yakasviba uko mapaipi anogona kuungana.
Kugadzirisa
MaDoppler flowmeters haadi kugadziriswa zvakanyanya pakushandisa mvura yakasviba uye slurry. Sezvo pasina zvikamu zvemukati kana zvikamu zvakanyoroveswa, hapana njodzi yekuvharika, ngura, kana kupera kubva kuzvinhu zvakasimba zvinogumbura. Kuongorora nguva dzose (semuenzaniso, kuona kurongeka kwetransducer kana kuchenesa nzvimbo dzekunze) kwakakwana kuti dzirambe dzichishanda, nepakati pegore rimwe kusvika maviri.
Ma "flowmeters" anofambiswa nenguva yekufamba kwemvura anoda kugadziriswa zvakanyanya munzvimbo dzine mvura yakasviba. Kunyange hazvo dhizaini yavo ye "clamp-on" ichidzivirira kusangana kwemvura zvakananga, kukanganiswa kwezviratidzo kubva kuzvinhu zvidiki zvinowanzoda kugadziriswazve (dzimwe nguva mwedzi mitanhatu yega yega) kuti zvirambe zvakarurama. Muzviitiko zvakakomba, vashandisi vangangoda kuchenesa mukati memapaipi kuti vabvise makomba kana marara - maitiro anotora nguva anokanganisa mashandiro emvura, kunyanya munzvimbo huru dzekuchenesa mvura yakasviba.
Mhedziso: Kusarudza Chishandiso Chakakodzera Basa
Pakushandisa mvura yakasviba netsvina, sarudzo pakati peDoppler netransit-time flowmeters inoenderana nekuchena kwemvura uye zvinhu zvinonyanya kukosha pakushanda. Doppler flowmeters ndiyo sarudzo yakajeka yemvura yakasviba isina kugadzirwa, slurry yekuchera, uye chero mvura ine zvidimbu zvakakosha kana mabubbles: kuvimba kwavo nekutarisa kwezvidimbu kunoita kuti zvive nyore kuverenga, nepo dhizaini yavo isingakuvadzi inoderedza kugadziriswa uye nguva yekushanda. Vanotsinhana kururama kwakaderera zvishoma kuti vagare kwenguva refu mumamiriro ezvinhu akaoma—kwakanakira kutarisa maitiro, kutevedzera mitemo, uye kutevera kushanda zvakanaka.
Kusiyana neizvi, ma "transit-time flowmeters" anonyatsochengeterwa mvura yakachena kana yakasefetwa zvishoma (semuenzaniso, mvura yakasviba yakanatswa) uko kunyatsoita kwayo kwakakosha uye kukanganiswa kwezvikamu kushoma. Kuashandisa mumvura isina kucheneswa kana mvura ine matope akawanda kunogona kukonzera zvikanganiso zvakawanda, kugadzirisa kunodhura, uye kunonoka kushanda.
Pakupedzisira, kusarudza ultrasonic flowmeter chaiyo hakusi chete tekinoroji - kunongova kuenzanisa simba re meter nematambudziko akasiyana emvura. Kune nyika "dzakasviba" dzemvura yakasviba nematope, Doppler flowmeters dzinoonekwa semhinduro inoshanda uye yakavimbika.
Nguva yekutumira: Gunyana-25-2025