Yintoni ebangela ukuxinana kokomisa nge-spray dryer… Indlela yokulawula

Yintoni ebangela ukuxinana kokomisa nge-spray dryer… Indlela yokulawula

 Isishwankathelo:

Ukutya okomisiweyo ngokutshiza kwahlulwe kubini: okunganamatheliyo nokuqinileyo. Izithako ezinganamatheliyo kulula ukuzitshiza zomile, uyilo olulula lokomisa kunye nokuhamba komgubo wokugqibela ngokukhululekileyo. Imizekelo yezinto ezinganamatheliyo ibandakanya umgubo weqanda, umgubo wobisi, izisombululo kunye nezinye i-maltodextrin, iintsini kunye neproteni. Kwimeko yokutya okunamathelayo, kukho ingxaki yokomisa phantsi kweemeko eziqhelekileyo zokutshiza ngokutshiza. Ukutya okunamathelayo kudla ngokunamathela eludongeni lomatshini wokutshiza, okanye kube kukutya okunamathelayo okungenamsebenzi kwiindawo zokutshiza nakwiinkqubo zothutho, ngeengxaki zokusebenza eziphantsi kunye nemveliso eveliswayo. Ukutya okuneswekile kunye ne-asidi yimizekelo eqhelekileyo.

I-Viscos yinto eyenzeka kwinkqubo yokomisa izinto zokutya ezityebileyo kwi-glycolic acid. I-Powder viscosity luhlobo lokusebenza kokunamathelana. Ingachaza i-particle-particle viscosity (cohesion) kunye ne-particle-wall viscosity (adhesion). Umlinganiselo wamandla okubopha kunye nama-powder particles ubangelwa ziimpawu zawo zangaphakathi ezibizwa ngokuba yi-cohesion, ezenza ubunzima kwindawo yomgubo. Ke ngoko, amandla afunekayo ukugqobhoza i-powder agglomerate kufuneka abe mkhulu kunokubambisana. Ukunamathela kukusebenza konxibelelwano, kwaye ama-powder particles anamathela kwindlela yezixhobo zokomisa ngokutshiza. Ukunamathelana kunye nokunamathela zezona parameter ziphambili zokuyila iimeko zokomisa kunye nokomisa. Ukwakheka komphezulu wama-powder particles kunoxanduva olukhulu lwe-viscosity. Ukunamathelana kunye nokunamathela kwezinto zomphezulu wama-powder particles zahlukile. Ngenxa yokuba ukomisa kufuna isixa esikhulu se-solute ukuze sidluliselwe kumphezulu wama-particle, sininzi. Iimpawu ezimbini ze-viscosity (cohesion kunye nokunamathela) zinokuhambelana kwizixhobo zokutya ezinamafutha amaninzi kwi-spray-drying. I-viscosity phakathi kwama-particles kukwenziwa kwama-fros olwelo oluzinzileyo, ama-fros olwelo oluhambayo, ii-mechanical chains phakathi kwee-molecules, kunye ne-electrostatic gravity kunye nama-solid bridges. Isizathu esiphambili sokunamathela kwamasuntswana omgubo wodonga kwigumbi lokomisa kukulahleka kwezinto ezikwiswekile eyomisa ngokutshiza kunye nokutya okune-asidi eninzi. Xa umgubo ugcinwa ixesha elide, uya koma eludongeni.

Ikhokelela ekubeni ibe krakra

SIteknoloji yokomisa ukutya okutyebileyo yokuphinda usebenzise i-spray drying drying powder. Iiswekile ezinobunzima obuphantsi be-molecular zinzima kakhulu (i-glucose, i-fructose) kunye ne-organic acids (i-citric acid, i-malic acid, i-tartaric acid). Izinto ezincinci ze-molecular ezifana nokufunxwa kwamanzi amaninzi, i-thermoplasticity kunye ne-low vitrification transition temperature (Tg) zinegalelo kwiingxaki ze-viscosity. Iqondo lokushisa lokomisa ngokufutha liphezulu kune-Tg20°C. Uninzi lwezi zinto zenza amasuntswana athambileyo kumphezulu oxineneyo, nto leyo ebangela i-powder viscosity, kwaye ekugqibeleni zenze isakhiwo se-paste endaweni ye-powder. Ukuhamba okuphezulu kwe-molecular yale molekyuli kungenxa yobushushu bayo obuphantsi be-vitrification transition (Tg), nto leyo ekhokelela kwiingxaki ze-viscosity kwi-spray dryers ezidla ngokuthandwa kubushushu. Iimpawu eziphambili zobushushu bokuguqulwa kweglasi kunye nobushushu bokuguqulwa kwesigaba esingaguqukiyo. Isiganeko sokuguquka kweglasi senzeke kwiswekile eqinileyo, engaguqukiyo, eyaguqulwa yaba yi-soft rabber liquid phase. Amandla ongaphezulu kunye neglasi eqinileyo zinamandla ongaphezulu kwaye azinamatheli kwiindawo eziqinileyo ezinamandla aphantsi. Ngenxa yemeko yeglasi ukuya kwi-rubber ferry (okanye ulwelo), umphezulu wezinto unokuphakanyiswa, kwaye ukusebenzisana phakathi kwe-molecule kunye nomphezulu oqinileyo kunokuqala. Kwimisebenzi yokomisa ukutya, imveliso ikwimeko yolwelo okanye yokuncamathelisa, kwaye ukutya okumanzi/okunamathelayo okususa i-plastic agent (amanzi) kuba yiglasi. Ukuba izinto zokutya ezikrwada azitshintshi ukusuka kubushushu bokuma obuphezulu kunobushushu beglasi, imveliso iya kugcina i-viscosity ephezulu. Ukuba olu hlobo lokutya luchukunyiswa ngumphezulu oqinileyo onamandla aphezulu, luya kunamathela okanye lunamathele kuwo.

Ukulawula i-viscosity 

Kukho iindlela ezininzi zesayensi yezinto kunye neendlela ezisekelwe kwinkqubo zokunciphisa i-viscosity. Iindlela ezisisiseko zesayensi yezinto ziquka izixhobo ezinezongezo zokomisa ulwelo ezinobunzima obukhulu be-molecular ukuze zonyuse ubushushu ngaphandle kokuguqulwa kwe-vitrification, kwaye iindlela ezisekelwe kwinkqubo ziquka iindonga kunye namazantsi egumbi loomatshini.