Ukuphinda kusetshenziswe i-polyvinyl chloride

I-Polyvinyl chloride ingenye yepulasitiki ezinhlanu ezinkulu ezisetshenziswa kabanzi emhlabeni. Ngenxa yezindleko zayo zokukhiqiza eziphansi uma kuqhathaniswa ne-polyethylene nezinye izinsimbi, kanye nokusebenza kwayo okuhle kakhulu kokucubungula kanye nezakhiwo zomzimba nezamakhemikhali zemikhiqizo, ingahlangabezana nezidingo zokulungiselela okuqinile kuya kokuthambile, okunwebekayo, i-fiber, ukumboza nezinye izakhiwo, futhi isetshenziswa kabanzi emikhakheni eyahlukene njengezimboni, ezolimo, kanye nokwakha. Indlela yokusebenzisa kabusha nokusebenzisa imfucuza ye-polyvinyl chloride ibaluleke kakhulu.
1. Ukuvuselelwa kabusha
Okokuqala, ukuvuselelwa okuqondile kungenziwa. Ukuvuselelwa okuqondile kwepulasitiki engcolile kubhekisela ekucutshungulweni okuqondile kanye nokubumba kwepulasitiki engcolile ngokuhlanza, ukuchoboza, kanye nokwenza ipulasitiki ngaphandle kwesidingo sokuguqulwa okuhlukahlukene, noma ukucubungula kanye nokubumba imikhiqizo nge-granulation. Ngaphezu kwalokho, ingashintshwa futhi iphinde ivuselelwe. Ukuguqulwa kanye nokuvuselelwa kwepulasitiki endala kubhekisela ekuguqulweni okungokoqobo kanye namakhemikhali kwepulasitiki ephinde yasetshenziswa ngaphambi kokucubungula nokwenziwa. Ukuguqulwa kungahlukaniswa ngokuguqulwa okungokoqobo kanye nokuguqulwa kwamakhemikhali. Ukugcwalisa, i-fibre composite, kanye nokuqinisa ukuxubana kuyindlela eyinhloko yokuguqulwa okungokoqobo kwe-PVC. Ukuguqulwa kokugcwalisa kubhekisela endleleni yokuguqula yokuxuba ngokulinganayo iziguquli zokugcwalisa izinhlayiya ezine-modulus ephezulu kakhulu kuma-polymer. Ukuguqulwa kokuqinisa i-fibre composite kubhekisela endleleni yokuguqula yokwengeza i-modulus ephezulu kanye nemicu yemvelo noma yokwenziwa enamandla aphezulu ku-polymer, ngaleyo ndlela kuthuthukisa kakhulu izakhiwo zemishini zomkhiqizo. Ukuguqulwa kwamakhemikhali kwe-PVC kufezwa ngokushintsha isakhiwo se-PVC ngokusebenzisa ukusabela okuthile kwamakhemikhali.
2. Ukususwa nokusetshenziswa kwe-hydrogen chloride
I-PVC iqukethe cishe i-chlorine engu-59%. Ngokungafani namanye ama-polymer e-carbon chain, uchungechunge lwegatsha lwe-PVC luyaphuka ngaphambi kochungechunge oluyinhloko ngesikhathi sokuqhekeka, lukhiqize inani elikhulu legesi ye-hydrogen chloride, ezokonakalisa imishini, ifake ubuthi ku-Catalyst poisoning, futhi ithinte ikhwalithi yemikhiqizo yokuqhekeka. Ngakho-ke, ukwelashwa kokususa i-hydrogen chloride kufanele kwenziwe ngesikhathi sokuqhekeka kwe-PVC.
3. Ukushisa i-PVC ukuze kusetshenziswe ukushisa kanye negesi ye-chlorine
Kumapulasitiki angcolile aqukethe i-PVC, isici sokukhiqizwa kokushisa okuphezulu ngokuvamile sisetshenziselwa ukuwaxuba nemfucuza ehlukahlukene evuthayo futhi sikhiqize uphethiloli oqinile onobukhulu obufanayo bezinhlayiya. Lokhu akugcini nje ngokwenza kube lula ukugcina nokuthutha, kodwa futhi kuthatha indawo kaphethiloli osetshenziswa kuma-boiler okushisa amalahle kanye nama-oven ezimboni, futhi kunciphisa i-chlorine ukuze kuthuthukiswe ukusebenza kahle kokushisa.