Izidingo Zobuchwepheshe zeSodium formaldehyde sulphoxylate-Kitty

1.2 Izinto ezingasetshenzisiwe kanye nezidingo zobuchwepheshe:

I-Sodium metabisulfite (Na2S2O5):Ibanga Lomkhakha I-industrial enokuqukethwe okungu->64% (ngokwe-SO2).

Isixazululo se-Industrial formaldehyde: ibanga lokuqala noma lesibili.

I-Zinc metal powder: 98% ingqikithi ye-zinc, hhayi ngaphansi kuka-94% wensimbi ye-zinc, i-zinc powder enokubukeka okumpunga.

1.3 Inqubo yokukhiqiza nokulawula

Ukukhiqizwa kwe-sodium formaldehydesulphoxylate ngale ndlela ikakhulukazi kuhlanganisa izinqubo ezintathu: ukusabela kokwengeza ukuncibilika, ukuhlukaniswa koketshezi oluqinile kanye nokuhwamuka kanye nokucwebezela.

(1) Ukusabela kokwengezwa kokunciphisa ukuncishiswa: ukusabela kwenziwa ku-reactor ene-porcelain-lined enyakazayo.

Ngokwesilinganiso esithile sesithako, i-metabisulphite ye-sodium, amanzi, i-zinc powder kanye nesisombululo se-formaldehyde kwengezwa kugedlela lokusabela, futhi inani elithile lezithasiselo liyengezwa ukusheshisa isivinini sokuphendula kanye nesizukulwane se-sodium formaldehydesulphoxylate. Ngemuva kokuthi zonke izinto zengezwe, ukusabela kushiswa ngokungaqondile ngesitimu eketelani elinyakaziswayo elivaliwe elinokunyakaziswa okuqhubekayo kanye nokushisa okungaguquki lapho izinga lokushisa lesixazululo eketela likhuphuka lifika ku-95 ° C.

Izinto ezisetshenziswayo ziyaphendulwa cishe amahora angu-2 futhi amasampula athathwa ukuze ahlaziywe.

I-equation yokusabela ibiyi:

Na2S2O5+2Zn+2CH2O+6H2O=2NaHSO2-CH2O-2H2O+ZnO↓+Zn(OH)2↓

Ngesikhathi sokusabela, ngaphezu kokuphuma kwe-sodium formaldehydesulphoxylate, i-zinc powder ehilelekile ekuphenduleni iguqulwa ibe yi-zinc oxide ne-zinc hydroxide.

Njengoba i-zinc powder yengezwa ngokweqile, kusekhona inani elincane le-zinc yensimbi futhi lokhu sikubiza ngodaka oluqinile lwezinc.

(2) Ukuhlukaniswa okuqinile-oketshezi: Ngemva kokuba ukusabela kuqediwe, ukupholisa okungaqondile kwenziwa ngamanzi.

Izinga lokushisa lezinto liyancishiswa libe ngaphansi kuka-50°C ukuze kuhlukaniswe uketshezi oluqinile. Ngenxa yemvelo yokugqwala yesixazululo, ukuhlukaniswa koketshezi oluqinile kwenziwa kusetshenziswa isihlungi sozimele wepuleti lerabha yepulasitiki enomfutho we-hydraulically. I-filtrate iphonswa ethangini lokugcina uketshezi elifanelekile. Ngemva kokuba ikhambi selicaciswe echibini isikhathi esithile bese lihlungwa okwesibili ukuze linikeze isisombululo esicacile esicacile sokuhwamuka nokugxila.

(3) Ukuhwamuka nokugxilisa ingqondo, ukupholisa kanye nokucwebezela: isixazululo se-sodium formaldehydesulphoxylate ethangini lokugcina simpontshelwa emkhunjini wokuhwamuka kwevacuum nge-vacuum.

Ukushisisa ngokungaqondile ngesitimu, inqubo yokuhwamuka ilawula izinga lokushisa elingaphansi kuka-65°C. Lapho ukugxila kwesixazululo ku-evaporator kufinyelela izidingo, ukugxila kufakwa ku-crystalliser, kupholiswe futhi kufakwe amakristalu ekamelweni lokushisa bese izingcezu ezinkulu zichotshozwa, bese kuthathwa amasampula futhi ahlolwe ngokuvumelana nezinga, kanye nemikhiqizo efanelekayo. igcwele.