Smaphunziro paTmaseweraPkatundu waPowderEjector zochokeraDuwuVanthuEzotsatira

The venturi ejector akhoza kupanga vacuum minda kunyamula particles chifukwa venturi kwenikweni. Kayendetsedwe ka ma ejectors a ufa potengera mphamvu imodzi ndi iwiri ya venturi komanso mphamvu ya nozzle pamayendedwe amawunikiridwa motsatana ndi njira yoyesera komanso kayeseleledwe ka manambala potengera njira yolumikizira ya CFD-DEM. Zotsatira zikuwonetsaliwiro la mphepowa tinthu polowera kumawonjezeka chifukwa cha pawiri-venturi tingati n'kopindulitsa kwa particles mujekeseni; mphamvu yoyendetsa tinthu tating'onoting'ono ndi madzimadzi imawonjezeka, kutanthauza kuti tinthu tating'onoting'ono titha kutumizidwa kumtunda wautali; kuyandikira kwa mphuno ndi kutumiza kunja, kumakulirakuliraliwiro la mphepowa tinthu polowera ndi yaikulu kuyamwa mphamvu akuchita pa particles ndi; pafupi ndi nozzle ndi kutumiza kunja, ndi zochepa mafunsidwe chiwerengero cha particles mujekesenindi; Komabe, particles akhoza kulepheretsa mu chubu venturi ngati nozzle ndi pafupi kwambiri kunja. Kuphatikiza apo, kuti muchepetse kuyika kwa tinthu, yankho labwino kwambiri likuperekedwa apa, mwachitsanzo, malo a nozzle kutali ndi kutumiza kunja,y∗ = 30 mm.

Mawu Oyamba

Ukadaulo wotumizira mpweya uli ndi zabwino zambiri, monga masanjidwe osinthika, osawononga fumbi, mtengo wotsika wantchito komanso kukonza kosavuta. Chifukwa chake, ukadaulo wotumiza pneumatic umagwiritsidwa ntchito kwambiri kumafuta amafuta, mankhwala, zitsulo, mankhwala, chakudya ndi ma mineral processing mafakitale. Venturi powder ejector ndiye wokhazikika wa gasi kutengera mphamvu ya venturi. Maphunziro ena oyesera ndi manambala pa jekeseni wa venturi adachitika mzaka khumi zapitazi kuti amvetsetse momwe zimayendera.

Wofufuzaadachita maphunziro oyesera ndi manambala a chubu cha jet potengera venturi ndikusanthula ubale pakati pa magawo osiyanasiyana ndi njira zoyesera ndi manambala.Wofufuza anachita mndandanda wa kafukufuku experimental onse gawo limodzi mpweya ndi mpweya-malasha osakaniza umayenda venturi, ndipo anasonyeza kuti amachepetsa lakuthwa mu malo amodzi kuthamanga ndi volumetric Mumakonda chiŵerengero ankaona mkati venturi.Wofufuzaanachita kafukufuku computational pa otaya khalidwe la mpweya olimba jekeseni ndi njira Eulerian, kusonyeza kuti nthawi avareji axial tinthu liwiro amawonjezeka choyamba ndiyeno amachepetsa.Wofufuzaadafufuza machitidwe a magawo awiri a gas-solid venturi pogwiritsa ntchito njira zoyesera ndi manambala.Wofufuzaadagwiritsa ntchito njira ya discrete element (DEM) kuti aphunzire jekeseni wokhazikika wa gasi, ndipo adapeza kuti tinthu tolimba timaunjikana pafupi ndi kumanzere kwa jekeseni chifukwa cha mphamvu yokoka ya tinthu tating'ono komanso kuzungulira kwa gasi.

Maphunziro omwe ali pamwambawa adangoyang'ana pa ejector ndi dongosolo limodzi la venturi, ndilo, zotsatira za single-venturi zinatchulidwa mu ejector. M'munda wa kuyeza kwa gasi, chipangizocho chokhazikika pawiri chimagwiritsidwa ntchito kwambiri kuti chiwonjezeke kusiyana kwa kuthamanga komanso kukonza kulondola kwa kuyeza. Komabe, ejector yokhala ndi double-venturi effect sichimagwiritsidwa ntchito nthawi zambiri poyendetsa tinthu tating'onoting'ono. Chinthu chofufuzira apa ndi venturi powder ejector yochokera ku double-venturi effect. Ejector imakhala ndi nozzle ndi chubu lonse la venturi. Zonse za nozzle ndi chubu cha venturi zimatha kupanga venturi, ndipo zikutanthauza kuti pawiri-venturi zotsatira zilipo mu ejector. The mpweya ndi mkulu liwiro Jets kuchokera nozzle wa venturi ejector, amene amapanga vacuum munda chifukwa venturi zotsatira ndi mphamvu particles kulowa mu suction chipinda mchikakamizo cha mphamvu yokoka ndi entrainment. Kenako, tinthu tating'onoting'ono timayenda ndi mpweya.

Njira yolumikizira ya Computational Fluid Dynamics-Discrete Element Method (CFD-DEM) yagwiritsidwa ntchito bwino pamakina ovuta a gasi olimba.Wofufuzaanatengera njira CFD-DEM chitsanzo mpweya tinthu awiri gawo otaya, ndi mpweya gawo ankaona ngati mosalekeza ndi kutengera mphamvu computational madzimadzi mphamvu (CFD), tinthu kuyenda ndi kugunda anali yoyerekeza ndi DEM code.Wofufuzaadatengera njira ya CFD-DEM kuti ayese kuyenda kwa gasi wokhazikika, DEM idagwiritsidwa ntchito kutengera gawo la tinthu tating'onoting'ono ndipo CFD yachikale imagwiritsidwa ntchito kutsanzira kutuluka kwamadzimadzi.Wofufuzaadapereka zofananira za CFD-DEM za bedi lokhala ndi madzi olimba a gasi ndipo adapereka chitsanzo chatsopano chokoka.Wofufuzaadapanga njira yatsopano yotsimikizira kayesedwe ka bedi lamadzi olimba a gasi kudzera pa CFD-DEM.Wofufuzantchito CFD-DEM ophatikizana njira yesezera mpweya-olimba otaya khalidwe mu TV ulusi kuphunzira chikoka cha CHIKWANGWANI kapangidwe ndi tinthu katundu pa tinthu mafunsidwe ndi agglomeration mu ndondomeko kusefera.

Mu pepalali, katundu wa zoyendera za ufa ejectors zochokera ku umodzi- ndi iwiri-venturi zotsatira ndi chikoka cha nozzle udindo pa ntchito mayendedwe ankatsatira ankafufuza ndi experimental njira ndi kayeseleledwe manambala kutengera CFD-DEM lumikiza njira.

Mapeto

Mayendedwe a ejectors otengera mphamvu imodzi ndi iwiri-venturi adafufuzidwa motsatana ndi njira yoyesera komanso kayeseleledwe ka manambala kutengera njira yolumikizira ya CFD-DEM. Zotsatira zapano zikuwonetsa kuthamanga kwa mphepo ya tinthu tating'onoting'ono tolowera chifukwa champhamvu yawiri-venturi, yomwe imapindulitsa tinthu tating'onoting'ono mu jekeseni. Mphamvu yoyendetsa particles ndi madzimadzi inawonjezeka, zomwe zimapindulitsa kuti tinthu tating'ono tisunthidwe kumtunda wautali.