Studies onTnhandarePmidziyo yePodhaEjector based onDubleVenuriEeffect

Iyo venturi ejector inogona kugadzira vacuum minda yekutakura zvimedu nekuda kwe venturi mhedzisiro. Kuitwa kwekufambisa kwepoda ejector kwakavakirwa pane imwe- uye mbiri-venturi mhedzisiro uye pesvedzero yechinzvimbo chemhino pakuita kwekufambisa kwakaongororwa zvakateerana nenzira yekuyedza uye yenhamba yekuenzanisa yakavakirwa paCFD-DEM yekubatanidza nzira. Migumisiro iripo inoratidzakumhanya kwemhepoye particle inlet inowedzera nekuda kwekaviri-venturi effect, iyo inobatsira kune zvimedu mujekiseni; simba rekufambisa rinoshandisa pazvimedu nemvura inowedzera, zvichireva kuti zvimedu zvinogona kutakurwa kuenda kure kure; iyo muromo uri pedyo nekutengesa kunze, iyo yakakurakumhanya kwemhepoof the particle inlet is uye guru rekusveta simba rinoshandisa pane zvimedu; iyo iri pedyo iyo muromo ndeyekutumira kunze, zvishoma iyo deposition nhamba yezvimedu mujekiseniis; zvisinei, zvimedu zvinogona kudziviswa kupinda venturi chubhu kana nozzle iri pedyo chaizvo ekisipoti. Pamusoro pezvo, kuti uderedze iyo particle deposition, iyo yakakwana mhinduro inounzwa pano, iyo, iyo nzvimbo yemuromo kure nekutengesa kunze,y∗ = 30 mm.

Nhanganyaya

Pneumatic conveying tekinoroji ine zvakawanda zvakanaka, senge inoshanduka dhizaini, hapana kusvibiswa kweguruva, mutengo wakaderera wekushanda uye nyore kugadzirisa. Nekudaro, tekinoroji yekufambisa pneumatic inoshandiswa zvakanyanya kupetroleum, makemikari, metallurgical, mishonga, chikafu uye mineral processing maindasitiri. Venturi poda ejector ndiyo gasi-yakasimba imwe yakavakirwa pane venturi mhedzisiro. Zvimwe zvidzidzo zvekuyedza uye zvenhamba pane venturi jekiseni zvakaitwa mumakore gumi apfuura kuitira kuti tinzwisise zvifambiso zvayo.

Mutsvakurudziyakaita zvidzidzo zvekuedza uye nhamba yejet tube yakabva pa venturi uye yakaongorora hukama pakati pemiganhu yakasiyana nekuedza uye nhamba nzira.Mutsvakurudzi akaita nhevedzano yeongororo yekuongorora kune ese gasi-chikamu gasi uye gasi-marasha musanganiswa inoyerera kuburikidza ne venturi, uye yakaratidza kuti inopinza inodzikira mu static pressure uye volumetric loading ratio yakaonekwa mukati me venturi.Mutsvakurudziyakaita ongororo yekombuta pamaitiro ekuyerera kwegasi-solid jekiseni nenzira yeEulerian, zvichiratidza kuti nguva yeavhareji axial particle velocity inowedzera kutanga yozodzikira.Mutsvakurudziyakaferefeta maitiro eaviri-chikamu gasi-yakasimba venturi nekuyedza uye nhamba nzira.Mutsvakurudzivakashandisa iyo discrete element method (DEM) kudzidza jekiseni rakasimba gasi, uye vakaona kuti zvimedu zvakasimba zvinonyatsoungana pedyo nechepasi penzvimbo yeruboshwe yejekiseni nekuda kwesimba regiravhiti rakasimba uye kutenderera kwegasi.

Zvidzidzo zviri pamusoro apa zvakangotarisa pane ejector ine imwe venturi chimiro, iyo, iyo imwe-venturi effect yakataurwa mu ejector. Mumunda wekuyeresa kuyerera kwegasi, mudziyo unobva pane kaviri-effect unoshandiswa zvakanyanya kuwedzera kudzvanywa mutsauko uye kuvandudza kuyera kurongeka. Nekudaro, iyo ejector ine kaviri-venturi mhedzisiro haiwanzo kushandiswa kutakura zvimedu. Chinhu chekutsvakurudza pano ndicho venturi powder ejector inobva paviri-venturi effect. Iyo ejector ine muromo uye yakazara venturi chubhu. Ose ari maviri emhuno uye venturi chubhu anogona kuburitsa iyo venturi mhedzisiro, uye zvinoreva kuti kaviri-venturi mhedzisiro iripo mune ejector. Kuyerera kwemhepo ine jets inomhanya kwazvo kubva mumuromo weventuri ejector, iyo inoumba nzvimbo yekutsvaira nekuda kweiyo venturi mhedzisiro uye masimba ezvimedu anopinda mukamuri yekusveta pasi pesimba regiravhiti uye kupinza. Zvadaro, zvidimbu zvinofamba nemhepo.

Iyo Computational Fluid Dynamics-Discrete Element Method (CFD-DEM) yekubatanidza nzira yakashandiswa zvinobudirira muakaoma gasi-yakasimba kuyerera masisitimu.Mutsvakurudziyakatora nzira yeCFD-DEM yekuenzanisira gasi-chikamu chechipiri-chikamu chekuyerera, chikamu chegasi chakabatwa sechinoenderera uye chakafananidzirwa necomputational fluid dynamics (CFD), particle motion uye kudhumhana kwakafananidzwa neDEM code.Mutsvakurudziyakatora nzira yeCFD-DEM yekutevedzera kuyerera kwakasimba gasi-yakasimba, DEM yakashandiswa kuenzanisa chikamu chegranular particle uye classical CFD inoshandiswa kutevedzera kuyerera kwemvura.Mutsvakurudziyakaratidza CFD-DEM yekufananidza yemubhedha wakasimba wegasi uye yakakurudzira modhi itsva yekudhonza.Mutsvakurudziyakagadzira nzira nyowani yekusimbisa yekuenzanisa kwemubhedha wakasimba wegasi-yakasimba kuburikidza neCFD-DEM.Mutsvakurudziyakashandisa iyo CFD-DEM yakasanganiswa nzira yekutevedzera gasi-yakasimba kuyerera hunhu mukati meiyo fibrous midhiya kuti idzidze pesvedzero yefiber chimiro uye particle zvimiro pane particle deposition uye agglomeration mukuita kusefa.

Mupepa iri, zvimiro zvekutakura zvehupfu ejector zvichibva pane imwechete- uye kaviri-venturi mhedzisiro uye pesvedzero yechinzvimbo chenozzle pane yekufambisa maitirwo akaongororwa zvakateerana nenzira yekuyedza uye nenhamba yekuenzanisa yakavakirwa paCFD-DEM yekubatanidza nzira.

Mhedziso

Kuitwa kwekufambisa kwemaejector kwakavakirwa pane imwe- uye kaviri-venturi mhedzisiro yakaongororwa nenzira yekuyedza uye yenhamba simulation yakavakirwa paCFD-DEM yekubatanidza nzira. Mhedzisiro iripo inoratidza kumhanya kwemhepo kwechidimbu inlet inowedzera nekuda kwekaviri-venturi mhedzisiro, iyo inobatsira kune zvimedu mujekiseni. Simba rekufambisa rezvimedu nemvura yakawedzera, izvo zvinobatsira kuti zvimedu zviendeswe kure kure.