Bukatun fasaha don Sodium formaldehyde sulfoxylate-Kitty

1.2 Raw kayan da buƙatun fasaha:

Sodium metabisulfite (Na2S2O5): Matsayin masana'antu I tare da abun ciki na> 64% (cikin sharuddan SO2).

Maganin formaldehyde na masana'antu: aji na farko ko na biyu.

Zinc karfe foda: 98% jimlar zinc, ba kasa da 94% zinc karfe, zinc foda tare da launin toka.

1.3 Tsarin samarwa da sarrafawa

Samar da sodium formaldehydesulphoxylate ta wannan hanya ya ƙunshi matakai guda uku: narke-raguwa ƙarin amsawa, rarrabuwar ruwa mai ƙarfi da evaporation da crystallization.

(1) Rage-raguwa ƙarin amsa: ana aiwatar da martanin a cikin injin da aka yi masa layi tare da motsawa.

Dangane da wani sashi na sinadari, sodium metabisulphite, ruwa, foda zinc da formaldehyde ana ƙara su cikin kettle na amsawa, kuma ana ƙara wasu adadin abubuwan ƙari don haɓaka saurin amsawa da haɓakar haɓakar sodium formaldehydesulphoxylate. Bayan an ƙara duk kayan, ana yin zafi a kaikaice ta tururi a cikin rufaffiyar tukunyar rufaffiyar tare da motsawa akai-akai da yawan zafin jiki lokacin da zazzabi na maganin a cikin kettle ya tashi zuwa 95 ° C.

Abubuwan suna reactedaround2h kuma ana ɗaukar samfurori don bincike.

Ma'aunin martani shine:

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

A lokacin da abun da ke ciki, ban da fitarwa na sodium formaldehydesulphoxylate, da zinc foda da hannu a cikin dauki aka canza zuwa zinc oxide da zinc hydroxide.

Kamar yadda zinc foda aka ƙara a wuce haddi, har yanzu akwai wani karamin adadin karfe zinc kuma muna kiran wannan m al'amarin zinc sludge.

(2) Rabuwar ruwa mai ƙarfi: Bayan an gama amsawa, ana yin sanyaya kai tsaye da ruwa.

An rage yawan zafin jiki na kayan zuwa ƙasa da 50 ° C don rabuwa mai ƙarfi-ruwa. Saboda yanayin lalacewa na maganin, ana yin rabuwar ruwa mai ƙarfi ta amfani da hydraulically matsi na roba farantin roba firam tace. Ana fitar da tacewa zuwa ƙwararriyar tankin ajiyar ruwa. Bayan an fayyace maganin a cikin tafki na wani ɗan lokaci sannan a tace a karo na biyu don samar da tsaftataccen bayani mai tsabta don ƙafewa da maida hankali.

(3) Evaporation da maida hankali, sanyaya da crystallisation: da sodium formaldehydesulphoxylate bayani a cikin ajiya tanki an pumped a cikin injin evaporation jirgin ruwa ta injin.

A kaikaice mai zafi ta hanyar tururi, tsarin evaporation yana sarrafa zafin da ke ƙasa 65 ° C. Lokacin da maida hankali na bayani a cikin evaporator ya kai ga abubuwan da ake bukata, an sanya hankali a cikin crystalliser, sanyaya da crystallized a dakin da zafin jiki da kuma manyan guda da aka murkushe, sa'an nan kuma an dauki samfurori da kuma gwada bisa ga ma'auni, kuma samfurori masu dacewa su ne. cushe.