Kev Kho Mob ntawm Wastewater muaj cov chromium hauv electroplating

Kev sib piv ntawm kev kho mob ntawm ferrous sulfate thiab sodium bisulfite

Cov txheej txheem ntawm electroplating cov khoom siv yuav tsum tau ua kom zoo nkauj, thiab hauv hluav taws xob hluav taws xob yuav siv cov roj av hluav taws xob, yog li cov ntaub ntawv hluav taws xob yuav ua rau cov dej khib nyiab vim yog cov quav tawv tawv. Lub chromium hauv dej khib nyiab muaj cov chromium muaj hexavalent chromium, uas yog tshuaj lom thiab nyuaj rau tshem tawm. Hexavalent chromium feem ntau yog hloov dua siab tshiab rau cov roj chromium thiab tshem tawm. Rau kev tshem tawm ntawm chrome-muaj cov tshuab hluav taws xob, tshuaj lom neeg coagulation thiab nag lossis daus feem ntau yog siv los tshem nws. Feem ntau siv yog ferrous sulfate thiab cov leeg qaub nciab los nag thiab sodium bisulfite thiab alkali txo cov dej nag lossis alkali txo cov txheej txheem nag lossis daus.

1. Ferrous sulfate thiab cov txiv qaub txo cov txheej txheem nag lossis daus

Ferrous sulfate yog cov acid acid coagulant nrog muaj zog oxidation-txo cov khoom. Kev txiav txim siab ntawm herkavent chromium tom qab cov roj ntsha npau suav, hloov siab, kom nws muaj peev xwm ntxiv cov txiaj ntsig hydroundation thiab nag lossis daus.

Ferrous sulfate ntxiv rau kev txo cov kua qaub COAGULANT Txo cov kua dej nag lossis daus muaj cov txiaj ntsig zoo ntawm chromium tshem tawm thiab tus nqi qis. Qhov thib ob, tsis tas yuav kho tus nqi pH ua ntej ntawm kev sib ntxiv ntawm ferrous sulfate, thiab tsuas yog xav tau ntxiv txiv qaub los kho tus nqi PH. Txawm li cas los xij, vim muaj ntau npaum li cas ntawm ferrous suldate dosing kuj tau ua rau muaj kev nce qib loj hauv cov av nkos, nce tus nqi ntawm kev kho mob sludge.

2, .sodium bisulfite thiab alkali txo cov txheej txheem nag lossis daus

Sodium Bisulfite thiab Alkali txo qis daus Desitation, Ph of Wastewater raug kho rau ≤2.0. Then sodium bisulfite is added to reduce chromate to trivalent chromium, and the waste water enters the comprehensive pool after the reduction is completed, the waste water is pumped to the regulating pool for adjustment, and the pH value is adjusted to about 10 by adding alkali nodes, and then the waste water is discharged to the sedimentation tank to precipitate chromate, and the removal rate can reach about 95%.

Cov txheej txheem ntawm sodium bisulfite thiab alkali txo cov nag lossis daus, thiab nws tus nqi yuav tsum muaj ntev dua, thiab tus nqi pH yuav tsum tau kho nrog acid ua ntej kev kho mob. Txawm li cas los xij, piv nrog ferrous suldate kev kho, nws yeej tsis tsim cov sludge ntau, thiab txo qis tus nqi ntawm sludge tau feem ntau tuaj yeem rov qab siv dua.