IZINDABA ZOMTHETHO
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IiMfuno zobuGcisa kwi-S...
2021-07-09
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Itshathi equkuqelayo yesodium esesikweni...
2021-07-09
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Isicelo kunye nenkqubo iphuhlisa...
2021-07-09
IiMfuno zobuGcisa zeSodium formaldehyde sulphoxylate-Kitty
1.2 Izinto ezisetyenziswayo kunye neemfuno zobugcisa:
I-Sodium metabisulfite (Na2S2O5):IBanga loku-I leMveliso elinomxholo we>64% (ngokwe-SO2).
Isisombululo se-Industrial formaldehyde: ibakala lokuqala okanye lesibini.
I-Zinc powder yensimbi: I-98% iyonke i-zinc, ingekho ngaphantsi kwe-94% yensimbi ye-zinc, i-zinc powder enembonakalo engwevu.
1.3 Inkqubo yemveliso kunye nolawulo
Imveliso yesodium formaldehydesulphoxylate ngale ndlela ikakhulu ibandakanya iinkqubo ezintathu: dissolution-unciphiso ukongezwa reaction, ukwahlula okuqinileyo-ulwelo kunye nokuphuma ngumphunga kunye crystallization.
(1) Ukuchithwa-ukunciphisa ukusabela kokongeza: ukusabela kuqhutyelwa kwi-reactor ene-porcelain-lined kunye ne-stiring.
Ngokomlinganiselo othile wezithako, i-metabisulphite yesodium, amanzi, umgubo we-zinc kunye nesisombululo se-formaldehyde zongezwa kwi-kettle yokusabela, kwaye inani elithile lezongezo zongezwa ukukhawulezisa isantya sokuphendula kunye nesizukulwana se-sodium formaldehydesulphoxylate. Emva kokuba zonke izinto zongezwa, ukusabela kushushu ngokungathanga ngqo nge-steam kwi-kettle evaliweyo evaliweyo kunye nokufudumala okuqhubekayo kunye nobushushu obuqhubekayo xa ukushisa kwesisombululo kwi-kettle kuphakama ukuya kuma-95 ° C.
Izinto eziphathekayo ziphendulwa malunga ne-2h kwaye iisampuli zithathwa ukuze zihlalutywe.
Impendulo yenxaki yaba:
Na2S2O5+2Zn+2CH2O+6H2O=2NaHSO2-CH2O-2H2O+ZnO↓+Zn(OH)2↓
Ngethuba lokuphendula, ngaphezu kwemveliso ye-sodium formaldehydesulphoxylate, i-zinc powder echaphazelekayo ekuphenduleni iguqulwa ibe yi-zinc oxide kunye ne-zinc hydroxide.
Njengoko i-zinc powder yongezwa ngokugqithisileyo, kusekho inani elincinci le-zinc yensimbi kwaye sibiza lo mbandela oqinileyo we-zinc sludge.
(2) Ukwahlula okuqinileyo-ulwelo: Emva kokuba impendulo igqityiwe, ukupholisa okungathanga ngqo kuqhutyelwa ngamanzi.
Ubushushu bezinto eziphathekayo buncitshiswe phantsi kwe-50 ° C ngokuhlukana okuqinileyo-ulwelo. Ngenxa yobume bobume besisombululo, ukwahlulwa kolwelo oluluqilima lwenziwa kusetyenziswa isihluzo sefreyimu yeplati yeplastiki enoxinzelelo lwe-hydraulically. I-filtrate impontshelwa kwitanki yokugcina ulwelo olufanelekileyo. Emva kokuba isisombululo sicaciswe kwi-reservoir ngexesha elithile kwaye emva koko sihluzwe okwesibini ukubonelela ngesisombululo esicacileyo esicacileyo sokuphefumula kunye nokugxininiswa.
(3) I-evaporation kunye nokugxininiswa, ukupholisa kunye nekristalisation: isisombululo se-sodium formaldehydesulphoxylate kwitanki yokugcina simpontshelwa kwisitya somphunga we-vacuum nge-vacuum.
Ubushushu obungathanga ngqo ngumphunga, inkqubo yokumka komphunga ilawula ubushushu obungaphantsi kwama-65°C. Xa ugxininiso lwesisombululo kwi-evaporator lufikelela kwiimfuno, ugxininiso lufakwa kwi-crystalliser, lupholile kwaye lufakwe kwi-crystallized kubushushu begumbi kwaye iziqwenga ezinkulu zityunyuziwe, emva koko iisampulu zithathwa kwaye zivavanywe ngokomgangatho, kunye neemveliso ezifanelekileyo. ipakishiwe.