Zofunikira Zaukadaulo za Sodium formaldehyde sulphoxylate-Kitty

1.2 Zida zopangira ndi zofunikira zaukadaulo:

Sodium metabisulfite (Na2S2O5):Industrial Grade I yokhala ndi> 64% (molingana ndi SO2).

Industrial formaldehyde solution: kalasi yoyamba kapena yachiwiri.

Zinc zitsulo ufa: 98% okwana nthaka, osachepera 94% nthaka zitsulo, nthaka ufa ndi imvi maonekedwe.

1.3 Njira yopangira ndi kuwongolera

Kupanga kwa sodium formaldehydesulphoxylate ndi njira iyi makamaka kumaphatikizapo njira zitatu: kusungunuka-kuchepetsa kuwonjezereka, kulekanitsa kwamadzi olimba ndi kutuluka kwamadzi ndi crystallization.

(1) Kusungunuka-kuchepetsa Kuwonjezera anachita: anachita ikuchitika mu porcelain-alimbane riyakitala ndi oyambitsa.

Malinga ndi chiŵerengero cha zinthu zina, sodium metabisulphite, madzi, zinki ufa ndi formaldehyde yankho amawonjezedwa ku ketulo anachita, ndipo kuchuluka kwa zina anawonjezera kufulumizitsa anachita liwiro ndi m'badwo wa sodium formaldehydesulphoxylate. Zida zonse zikawonjezeredwa, zomwe zimatenthedwa mosadukiza ndi nthunzi mu ketulo yotsekedwa yotsekedwa ndi kugwedezeka kosalekeza komanso kutentha kosalekeza pamene kutentha kwa yankho mu ketulo kumakwera mpaka 95 ° C.

Zidazo zimasinthidwa pafupifupi 2h ndipo zitsanzo zimatengedwa kuti ziwunikidwe.

Ma reaction equation anali:

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

Pazimenezi, kuwonjezera pa linanena bungwe sodium formaldehydesulphoxylate, ndi nthaka ufa nawo anachita ndi kusandulika nthaka okusayidi ndi nthaka hydroxide.

Popeza ufa wa zinki umawonjezeredwa mopitirira muyeso, pamakhalabe chitsulo chochepa chachitsulo ndipo timatcha chinthu cholimba ichi zinc sludge.

(2) Kulekanitsa kwamadzi okhazikika: Zomwezo zikatha, kuziziritsa kosalunjika kumachitika ndi madzi.

Kutentha kwa zinthuzo kumachepetsedwa kukhala pansi pa 50 ° C pakulekanitsa kwamadzi olimba. Chifukwa cha kuwononga kwa yankho, kulekanitsa kwamadzi olimba kumachitika pogwiritsa ntchito fyuluta ya pulasitiki ya hydraulically pressurized plate rabber frame. Filtrate imaponyedwa ku tanki yosungiramo madzi oyenerera. Pambuyo njira wakhala momveka mu mosungira kwa nthawi inayake ndiyeno osasankhidwa kachiwiri kupereka koyera bwino njira yothetsera evaporation ndi ndende.

(3) Mpweya ndi kukhazikika, kuziziritsa ndi crystallization: njira yothetsera sodium formaldehydesulphoxylate mu thanki yosungiramo imaponyedwa mu chotengera cha vacuum ndi vacuum.

Kutenthedwa mosadukiza ndi nthunzi, njira ya evaporation imayendetsa kutentha kosachepera 65°C. Pamene ndende ya yankho mu evaporator ifika pa zofunikira, kuikako kumayikidwa mu crystalliser, utakhazikika ndi crystallized kutentha firiji ndipo zidutswa zazikulu zimaphwanyidwa, ndiye zitsanzo zimatengedwa ndikuyesedwa malinga ndi muyezo, ndipo mankhwala oyenerera ndi oyenerera. zodzaza.