Purification ntawm alkaline khib nyiab roj los ntawm Electroplating ntawm hluav taws xob cua sov raj
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Purification ntawm alkaline khib nyiab roj los ntawm Electroplating ntawm hluav taws xob cua sov raj
Ua ntej, nws yog ib qho tsim nyog los xam cov pa ntim ntawm NOx tso pa roj, nrog rau qhov tsis kam ntawm tag nrho cov pa xa hluav taws xob, lub tshuab nqus tsev, thiab cov purification ntauwd, raws li qhov tseeb ntawm cov nroj tsuag electroplating, thiab xaiv lub tshuab cua kom haum. . Nyob rau tib lub sijhawm, ntxiv kev nyab xeeb xws li huab cua ntim thiab cua siab yuav tsum tau xav txog. Siv qhov yuav tsum tau ua (centrifugal ntxuam) cov tshuab ua pa, NOx cov pa khib nyiab tsim los ntawm cov kua qaub pickling tank yog nkag mus rau hauv qab sab ntawm cov khib nyiab roj purification ntauwd los ntawm kev ntes cov pa hood thiab qhov cua nkag, thiab nce hauv cov pej thuam. Cov kua nqus dej yog sib npaug sib npaug hauv cov txheej ntim los yog swirl (inclined qhov) phaj thiab ntws downwards. Lub pej thuam yog ua raws li kev xav ntawm ob lub membrane txoj kev xav ntawm cov pa thiab cov kua dej hloov pauv, qhov twg cov roj thiab cov kuab tshuaj muaj nyob rau hauv tag nrho kev sib cuag thiab raug tshuaj lom neeg, ua rau muaj kev cuam tshuam loj heev. Raws li cov complex muaj pes tsawg leeg, siab concentration, thiab nyuaj rau kho cov yam ntxwv ntawm NOx tso pa roj, ib tug ob-theem tso pa purification (absorption) pej thuam yog tsim nyob rau hauv lub system los ua kom cov huab hwm coj hloov ntawm NOx thiab cov kua nqus dej, txaus Lub sij hawm tshuaj tiv thaiv rau NOx cov pa roj kom diffuse nyob rau hauv cov kua theem, absorbed, yaj, thiab purified. Cov txheej txheem no npaj cov catalytic txo tus neeg sawv cev sib xyaw kom haum, uas muaj qhov nqus tau zoo rau siab concentration NOx tso pa roj, ntxiv dag zog rau cov txheej txheem nqus, ua kom cov tshuaj tiv thaiv sai, txhim kho kev nqus tau zoo thiab ua kom huv si.
2.2.3.5 Purification ntawm alkaline pov tseg roj
Hauv electroplating, ntau cov roj alkaline pov tseg feem ntau yog los ntawm cov tshuaj degreasing thiab alkaline plating. Txhawm rau ua tiav qhov no, alkaline khib nyiab tuaj yeem kho tau los ntawm cov raj xa dej los ntawm "alkali pos huab purification pej thuam", uas siv cov tshuaj tua kab mob hauv cov pej thuam kom tshem tawm cov roj alkaline pov tseg. Tsis tas li ntawd, alkaline khib nyiab kuj tuaj yeem nkag mus rau hauv "acid pos huab purification ntauwd" thiab nruab nrab ib txhij nrog acidic khib nyiab roj (tsis suav nrog kev kho ammonia uas muaj cov pa khib nyiab). Ammonia uas muaj cov pa khib nyiab tsuas tuaj yeem sau thiab kho nyias. Vim muaj tshuaj lom neeg cov tshuaj tiv thaiv ntawm ammonia uas muaj cov pa khib nyiab thiab cov tshuaj chlorine lossis fluorine uas muaj cov pa khib nyiab hauv cov kua qaub pov tseg, cov av dawb ntawm ammonium chloride lossis ammonium fluoride tuaj yeem tsim tau yooj yim, uas tuaj yeem yooj yim ua rau txhaws ntawm cov kav dej thiab muab tso rau hauv lub purification ntauwd, cuam tshuam cov emission ntawm cov pa khib nyiab. Yog li ntawd, rau kev kho cov ammonia uas muaj cov pa khib nyiab, tsuas yog siv cov "alkali pos huab purification pej thuam" cais, thiab dilute sulfuric acid tuaj yeem siv los ua cov tshuaj txau, Tsuas yog tom qab ntawd tuaj yeem ua kom cov ammonia uas muaj cov pa khib nyiab pov tseg.
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