Ukwelashwa kwamanzi amdaka aqukethe i-chromium in electroplating

Ukuqhathaniswa kwemiphumela yokwelashwa ye-sulfate ye-ferrous ne-sodium bisulfite

Inqubo yokukhiqizwa kwama-electroplating idinga ukuhlukaniswa, futhi enqubweni yokuhlanzwa kwe-gallvaning, isitshalo se-electroplating sizosebenzisa i-chromate, ngakho-ke i-electroplating wastewater izokhiqiza inani elikhulu lamanzi aqukethe ama-chromium ngenxa yepromium. I-chromium e-wastewater equkethe i-chromium iqukethe i-chromium ye-hexavalent, enobuthi futhi kunzima ukuyikhipha. I-Hexavallent Chromium imvamisa iguqulwa ibe yi-chromium ye-trivallent futhi isuswe. Ukususwa kwamanzi angcolile we-electrome-aqukethe i-electrome-e-electroplating, ukubheja kanye nezulu kuvame ukusetshenziselwa ukuyisusa. I-Ejwayelekile esetshenziswa yi-sulfate ye-farrous kanye ne-lime redrication teapitation indlela kanye ne-sodium bisulfite ne-alkali yokunciphisa umoya.

1. I-Ferrous sulfate kanye nendlela yokunciphisa imvula

I-Ferrous Sulfate iyi-coagulant eqinile ye-acid ene-oxidation eqinile yokunciphisa i-oxidation. I-Ferrous Sulfate ingancishiswa ngokuqondile nge-chromium ye-hexavalent ngemuva kwama-hydrolysis emanzini angcolile, ukuguqula ibe yingxenye yokuqamba ama-chromium we-chromium, bese wengeza i-lime ukuze uguqule ukusabela kwe-ph hydroxide, umphumela wokususwa kwe-chromate ungafinyelela kuma-94% angafinyelela cishe kuma-94%.

I-Ferrous Sulfate Sulfate Sulfate Plus Chromate Thromate Preaticutant inomphumela omuhle ekususweni kwe-chromium kanye nezindleko eziphansi. Okwesibili, asikho isidingo sokuguqula inani le-PH ngaphambi kokufakwa kwe-sulfate ye-ferrous, futhi kudingeka kuphela ukwengeza ku-lime ukuze ulungise inani le-PH. Kodwa-ke, ngenxa yenani elikhulu le-ferrous sulfate dosing futhi yabangela ukwanda okukhulu kudaka lwensimbi, okwandisa izindleko zokwelashwa kwe-sludge.

2, .Sodium bisulfite kanye ne-alkali yokunciphisa imvula

I-Sodium Bisulfite kanye ne-Alkali yokunciphisa i-chromate ye-alkali, i-PH yamanzi angcolile ayashintshwa ku-≤2.0. Bese kufakwa i-sodium bisulfite ukuze unciphise i-chromate ku-chromium ye-trivallent, futhi amanzi okungcola angena kwithafa eliphelele ngemuva kokuqothulwa kwe-alkali, bese kuthi amanzi okungcola akhishwe ethangini le-alkali, bese kuthi amanzi okungcola akhishwe ethangini le-alkali, bese kuthi amanzi okulahla akhishwe ku-95%.

Indlela ye-sodium bisulfite kanye ne-alkali yokunciphisa i-chromate i-chromate ilungele ukususwa kwe-chromium, futhi izindleko zayo ziphakeme kakhulu kune-sulfate evuthayo, futhi isikhathi sokuphendula sokwelashwa siyisikhathi eside, futhi inani le-PH lidinga ukulungiswa nge-acid ngaphambi kokwelashwa. Kodwa-ke, uma kuqhathaniswa nokwelashwa kwe-sulfate enobuntu, ngokuyisisekelo akukhiqizi kakhulu i-sludge, kunciphisa kakhulu izindleko zokwelashwa kwe-sludge, kanye ne-sludge ephathisiwe ngokuvamile kungasetshenziswa kabusha.