Sodium Sulfide Kev Kho Dej Ncua Kev Siv thiab Kev Tiv Thaiv

Cov dej khib nyiab sodium sulfide, uas tsim los ntawm ntau yam txheej txheem kev lag luam xws li kev tsim tshuaj lom neeg, kev khawb av, thiab kev tsim cov ntawv pulp, muaj kev pheej hmoo loj rau ib puag ncig thiab kev noj qab haus huv vim nws muaj tshuaj lom thiab xeb ntau. Kev kho cov dej khib nyiab no kom zoo yog qhov tseem ceeb kom txo nws cov kev cuam tshuam tsis zoo. Cov ntawv blog no yuav qhia txog cov txheej txheem kho thiab cov kev ceev faj tseem ceeb rau cov dej khib nyiab sodium sulfide.

1. Txoj kev kho mob

1.1 Chemical Precipitation

Tshuaj los nag yog ib txoj hauv kev siv ntau tshaj plaws los kho cov dej khib nyiab sodium sulfide. Nyob rau hauv cov txheej txheem no, hlau ntsev xws li hlau ntsev (ferrous sulfate, ferric chloride) los yog tooj liab ntsev yog ntxiv rau cov dej khib nyiab. Cov sulfide ions hauv sodium sulfide hnov ​​​​mob nrog cov hlau ions, uas ua rau tsim cov hlau sulfide insoluble precipitates. Tom qab nag lossis daus cov tshuaj tiv thaiv, cov khoom sib cais yog nqa tawm los ntawm sedimentation lossis filtration, tshem tawm sulfide los ntawm cov dej khib nyiab. Txoj kev no yog qhov yooj yim, tus nqi - zoo, thiab tsim nyog rau kev kho cov dej khib nyiab nrog high - concentration sulfide.

1.2 Kev kho oxidation

Kev kho oxidation tuaj yeem hloov sulfide hauv sodium sulfide cov dej khib nyiab rau hauv cov khoom tsis zoo. Cov txheej txheem oxidation feem ntau suav nrog huab cua oxidation, chlorine oxidation, thiab cov txheej txheem oxidation siab heev (AOPs).

• Kev Oxidation Los Ntawm Huab Cua : Yog tias muaj cov tshuaj catalysts xws li manganese dioxide, huab cua yuav nkag mus rau hauv cov dej khib nyiab. Nyob rau hauv cov xwm txheej aerobic, sulfide yuav raug oxidized mus rau hauv cov sulfur lossis sulfate. Txoj kev no siv hluav taws xob tsawg tab sis yuav tsum siv sijhawm ntev thiab tsim nyog dua rau kev kho cov dej khib nyiab uas muaj cov sulfide tsawg.

• Kev Oxidation ntawm Chlorine : Cov tshuaj oxidants uas muaj chlorine xws li sodium hypochlorite lossis chlorine gas siv los oxidize sulfide. Kev oxidation ntawm chlorine yog ua tau sai thiab zoo, tab sis nws yuav tsim cov khoom tsis zoo, yog li ntawd yuav tsum tau ceev faj txog kev tswj cov tshuaj ntau npaum li cas.

• Cov Txheej Txheem Oxidation Siab Tshaj Plaws (AOPs) : AOPs, xws li Fenton oxidation thiab ozone oxidation, tsim cov hydroxyl radicals uas muaj zog heev. Cov radicals no tuaj yeem oxidize sulfide sai sai thiab ua rau nws muaj mineralize tag nrho. Piv txwv li, Fenton oxidation siv hydrogen peroxide thiab ferrous ions los tsim cov hydroxyl radicals, uas tuaj yeem kho tau ob qho tib si qis - thiab siab - concentration sulfide dej khib nyiab.

1.3 Kev kho mob lom

Kev kho mob lom neeg siv cov kab mob microorganisms kom degrade sulfide hauv dej khib nyiab. Kev kho mob anaerobic, xws li kev zom zaub mov anaerobic, tuaj yeem hloov cov sulfide rau hauv hydrogen sulfide roj raws li cov xwm txheej anaerobic, uas tuaj yeem raug tshem tawm los ntawm cov khoom siv roj. Kev kho mob aerobic suav nrog cov kab mob aerobic uas oxidize sulfide rau sulfate ua ib feem ntawm lawv cov txheej txheem metabolic. Kev kho mob lom neeg yog ib puag ncig zoo thiab ruaj khov, tab sis nws yuav tsum muaj kev ua haujlwm ruaj khov thiab lub sijhawm kho mob ntev.

2. Ceev Faj

2.1 Kev Nyab Xeeb Kev Nyab Xeeb

• Sodium sulfide cov dej khib nyiab yog cov tshuaj lom heev thiab tuaj yeem tso cov pa phem hydrogen sulfide thaum sib cuag nrog cov kua qaub lossis hauv qee yam mob. Yog li ntawd, thaum lub sijhawm kho, cov neeg ua haujlwm yuav tsum hnav cov khoom tiv thaiv tus kheej tsim nyog, suav nrog cov npog ntsej muag roj, hnab looj tes, thiab khaub ncaws tiv thaiv, tiv thaiv kev nqus pa thiab tiv thaiv daim tawv nqaij nrog cov tshuaj lom.

• Cov chaw kho mob yuav tsum tau ua kom zoo - qhov cua kom ntseeg tau tias lub sijhawm tso tawm ntawm hydrogen sulfide gas, txo qhov kev pheej hmoo ntawm cov roj tsub zuj zuj thiab tawg. Kev tshawb nrhiav roj tsis tu ncua hauv thaj chaw kho mob yog qhov tseem ceeb los saib xyuas cov concentration ntawm hydrogen sulfide thiab lwm cov pa phem.

2.2 Kev ceev faj ua haujlwm

• Kev Tswj Xyuas Qhov Tshuaj Reagent : Hauv kev siv tshuaj lom neeg thiab kev kho oxidation , kev tswj xyuas qhov ntau npaum li cas ntawm cov tshuaj reagents yog qhov tseem ceeb heev. Kev siv tshuaj reagents tsis txaus yuav ua rau kev kho mob tsis tiav, thaum kev siv tshuaj ntau dhau tsis yog tsuas yog ua rau cov nqi kho mob nce ntxiv xwb tab sis kuj tseem yuav ua rau muaj kuab paug thib ob. Piv txwv li, hauv kev siv tshuaj lom neeg, kev siv cov ntsev hlau ntau dhau yuav ua rau muaj cov hlau ions seem hauv cov dej kho.

• Kev Tswj pH : Tus nqi pH ntawm cov dej khib nyiab cuam tshuam rau qhov ua tau zoo ntawm kev kho. Hauv cov tshuaj lom neeg, cov hlau sulfide sib txawv tsim tau zoo tshaj plaws hauv cov pH tshwj xeeb. Hauv kev kho oxidation, qhov nrawm ntawm kev ua haujlwm oxidation thiab cov khoom sib xyaw kuj muaj feem cuam tshuam nrog tus nqi pH. Yog li ntawd, kev saib xyuas tas li thiab kev hloov kho tus nqi pH thaum lub sijhawm kho yog qhov tsim nyog.

• Kev Txij Nkawm Khoom Siv : Kev txij nkawm tsis tu ncua ntawm cov khoom siv kho dej, xws li cov twj tso kua mis, cov khoom sib tov, thiab cov thoob dej tso dej, yog qhov tseem ceeb kom ntseeg tau tias cov txheej txheem kho dej ua haujlwm ib txwm. Cov khoom siv tiv taus xeb yuav tsum tau siv rau cov khoom siv uas sib cuag nrog sodium sulfide dej khib nyiab kom ntev lub neej kev pabcuam ntawm cov khoom siv.

2.3 Kev Tiv Thaiv Ib puag ncig kev tiv thaiv

• Cov sludge generated thaum lub sij hawm kev kho mob, tshwj xeeb tshaj yog nyob rau hauv tshuaj los nag, muaj ib tug loj npaum li cas ntawm hlau sulfide precipitates thiab tej zaum kuj muaj residual reagents. Cov sludge no yuav tsum tau muab pov tseg kom zoo los tiv thaiv cov pa phem thib ob. Nws tuaj yeem raug xa mus rau cov chaw kho kev puas tsuaj rau kev pov tseg.

• Tom qab kev kho mob, qhov zoo ntawm cov dej effluent yuav tsum tau soj ntsuam nruj me ntsis kom ntseeg tau tias nws ua tau raws li cov qauv kev cuam tshuam hauv lub tebchaws thiab hauv zos. Yog tias qhov dej tsis zoo tsis ua raws li qhov yuav tsum tau ua, kev kho mob ntxiv lossis kev kho cov txheej txheem yuav tsum tau ua.

Hauv kev xaus, kev kho cov dej khib nyiab sodium sulfide yuav tsum muaj kev nkag siab zoo ntawm ntau txoj kev kho mob thiab ua raws li kev ceev faj nruj. Los ntawm kev xaiv txoj kev kho kom tsim nyog thiab ua raws li cov txheej txheem ua haujlwm raug, peb tuaj yeem txo qhov cuam tshuam ib puag ncig ntawm sodium sulfide cov dej khib nyiab thiab pab txhawb kev tiv thaiv ib puag ncig.