Cov dej khib nyiab tawm thaum lub sij hawm cov kua qaub pickling muaj xws li sulfuric acid pov tseg thiab hydrochloric acid pov tseg. Cov lag luam loj thiab nruab nrab tsim ntau tshaj 250 tons ntawm cov kua qaub pov tseg ib hlis twg uas yuav tsum tau muab pov tseg. Cov kua khib nyiab no feem ntau muaj kwv yees li 4% sulfuric acid, tshaj 20% ferrous sulfate, thiab lwm yam hlau.
Kev kho ntawm Sulfuric Acid Waste Liquid:
(1) Neutralization Method: Txoj kev no siv limestone ua tus neeg sawv cev nruab nrab kom tsis txhob muaj cov sulfuric acid hauv cov kua khib nyiab. Nws tsim insoluble calcium sulfate uas muaj hlau, uas tuaj yeem raug tshem tawm thiab khaws cia ib ntus. Txawm li cas los xij, ferrous sulfate hauv cov kua khib nyiab tsis zoo rov qab los. Txoj kev no tam sim no siv tsawg dua.
(2) Kev tsim cov ferrous sulfate: Qee cov tuam txhab tsim khoom siv cov kua qaub pov tseg los ntawm kev tso rau hauv lub tank kho, ntxiv qee qhov ntawm cov hlau filings residue, thiab cua sov nrog chav los txhawb cov tshuaj tiv thaiv ntawm sulfuric acid thiab hlau los tsim ferrous sulfate, txo cov acid concentration hauv cov kua qaub pov tseg. Thaum pH nce mus txog 6 thiab qhov ceev nce mus txog 1126g / cm2, cov kua khib nyiab tuaj yeem lim kom tshem tawm cov ntaub ntawv hlau thiab impurities ua ntej tso rau hauv lub tank crystallization. Thaum txias, khoom ferrous sulfate tau txais. Txoj kev no yog qhov yooj yim thiab ua tau, tso cai rau kev tsim cov ferrous sulfate raws li cov khoom lag luam.
(3) Natural Crystallization thiab Concentrated Crystallization Method for Iron Reduction: Cov kua qaub da dej uas siv tsis tau hauv online yog txias los yog evaporated thiab concentrated rau precipitate hlau nyob rau hauv daim ntawv ntawm ferrous sulfate heptahydrate. Tom qab sib cais cov kua-kua, ferrous sulfate heptahydrate thiab kua qaub tau txais, thiab cov kua qaub tuaj yeem rov qab siv dua.
Kev kho ntawm Hydrochloric Acid Bath:
Kev tsim cov hydrochloric acid da dej pov tseg cov kua yog qhov tsawg thaum lub sij hawm kub-dip galvanizing txheej txheem, thiab cov chaw tsim khoom feem ntau siv cov txheej txheem neutralization los kho hydrochloric acid pickling khib nyiab kua.
