Iyini i-PFD?
Context:Ubunjiniyela benqubo buhilela ukusetshenziswa kwamathuluzi nezindlela eziningi. Kuye ngohlobo oluqondile lwesistimu, izinqubo kudingeka zilingiswe futhi zilingiswe kusetshenziswa izibalo nesayensi yamakhompyutha. Izinqubo lapho ushintsho lwesigaba nokulinganisela kwesigaba kusebenza khona kudinga ukuhlaziywa kusetshenziswa izimiso nemithetho ye-thermodynamics ukulinganisa izinguquko zamandla nokusebenza kahle. Ngokuphambene, izinqubo ezigxile ekuhambeni kwezinto namandla njengoba zisondela ezilinganisweni zihlolwa kangcono kusetshenziswa imikhakha yemishini yoketshezi kanye nezimo zokuthutha. Izifundo emkhakheni wemishini kudingeka zisetshenziswe lapho kukhona uketshezi noma imidiya enama-porous ne-dispersed. Izimiso zobunjiniyela bezinto zokwakha nazo kudingeka zisetshenziswe, lapho kufanele khona.  Ukukhiqiza emkhakheni wobunjiniyela benqubo kuhilela ukuqaliswa kwezigaba zokuhlanganiswa kwenqubo. Ngaphandle kwamathuluzi adingekayo, ubunjiniyela benqubo bese bufometha ngokusebenzisa idayagramu yokuhamba kwenqubo (PFD) lapho kunqunywa khona imizila yokuhamba kwempahla, imishini yokugcina (efana namathangi nama-silos), ukuguqulwa (njengamakholomu okuphuza, amathangi omamukeli / amakhanda, ukuxuba, ukuhlukanisa, ukupompa, njll.) kanye namazinga okugeleza, kanye nohlu lwawo wonke amapayipi nama-conveyors nokuqukethwe kwawo, izakhiwo zezinto ezifana nobuningi, i-viscosity, ukusatshalaliswa kosayizi bezinhlayiyana, amazinga okugeleza, izingcindezi, amazinga okushisa, kanye nezinto zokwakha zomsebenzi wamapayipi neyunithi.
I-PFD isifinyezo se-process flow diagram.  Imidwebo yokugeleza kwenqubo ichaza izindlela zokugeleza kwempahla, imishini yokugcina (njengamathangi nama-silos), ukuguqulwa (njengamakholomu okudidiyela, amathangi omamukeli / amakhanda, ukuxuba, ukuhlukanisa, ukupompa, njll.), kanye namazinga okugeleza. Futhi zibhala uhlu lwawo wonke amapayipi nama-conveyor kanye nokuqukethwe kwawo, izakhiwo zezinto ezifana nobuningi, i-viscosity, ukusatshalaliswa kosayizi wezinhlayiyana, amazinga okugeleza, izingcindezi, amazinga okushisa, nezinto zokwakha zemisebenzi yamapayipi neyunithi.