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

Sodium sulfide cov dej khib nyiab, tsim los ntawm ntau yam kev lag luam xws li kev tsim tshuaj lom neeg, mining, thiab cov khoom siv pulp, ua rau muaj kev phom sij rau ib puag ncig thiab kev noj qab haus huv vim nws cov tshuaj lom thiab corrosiveness. Kev kho cov dej khib nyiab no zoo yog qhov tseem ceeb kom txo qis nws qhov cuam tshuam tsis zoo. Tsab ntawv blog no yuav qhia meej txog txoj kev kho mob thiab kev ceev faj tseem ceeb rau sodium sulfide dej khib nyiab.

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).

• Cua Oxidation: Nyob rau hauv lub xub ntiag ntawm catalysts xws li manganese dioxide, huab cua yog nkag mus rau hauv cov dej khib nyiab. Nyob rau hauv aerobic tej yam kev mob, sulfide yog oxidized rau elemental sulfur los yog sulfate. Txoj kev no yog lub zog - muaj txiaj ntsig tab sis yuav tsum tau siv lub sijhawm ntev thiab tsim nyog rau kev kho cov dej khib nyiab nrog cov sulfide tsawg tsawg.

• Chlorine Oxidation: chlorine - muaj oxidants xws li sodium hypochlorite los yog chlorine gas yog siv los oxidize sulfide. Chlorine oxidation yog sai thiab siv tau, tab sis nws yuav tsim teeb meem los ntawm - cov khoom, yog li ceev faj tswj ntawm cov tshuaj yog tsim nyog.

• Advanced Oxidation Processes (AOPs): AOPs, xws li Fenton oxidation thiab ozone oxidation, tsim cov reactive hydroxyl radicals heev. Cov radicals no tuaj yeem oxidize sulfide sai thiab ua tiav nws cov ntxhia. Piv txwv li, Fenton oxidation siv hydrogen peroxide thiab ferrous ions los tsim hydroxyl radicals, uas tuaj yeem kho tau zoo ob qho tib si qis - thiab siab - concentration sulfide cov 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

• Reagent Dosage Control: Hauv chemical nag lossis daus thiab Kev kho oxidation, kev tswj kom raug ntawm cov tshuaj reagents yog qhov tseem ceeb. Kev noj tshuaj reagent tsis txaus yuav ua rau muaj kev kho tsis tiav, thaum noj ntau dhau tsis tsuas yog nce nqi kho mob xwb tab sis kuj tseem tuaj yeem ua rau muaj kev ua qias tuaj. Piv txwv li, nyob rau hauv cov tshuaj los nag, ib tug ntau npaum li cas ntawm cov hlau ntsev yuav ua rau muaj cov seem hlau ions nyob rau hauv cov dej kho.

• pH tswj: Tus nqi pH ntawm cov dej khib nyiab cuam tshuam rau kev kho kom zoo. Hauv tshuaj nag lossis daus, cov hlau sulfide sib txawv ua rau pom zoo nyob rau hauv cov pH tshwj xeeb. Hauv kev kho oxidation, oxidation cov tshuaj tiv thaiv tus nqi thiab cov khoom muaj pes tsawg leeg kuj zoo sib xws nrog tus nqi pH. Yog li ntawd, kev soj ntsuam tas li thiab kev hloov pauv ntawm tus nqi pH thaum lub sijhawm kho yog tsim nyog.

• Txij Nkawm Khoom Siv: Kev saib xyuas cov khoom siv kho mob tsis tu ncua, xws li cov twj tso kua mis, cov khoom sib tov, thiab cov tso tsheb hlau luam tawm, yog qhov tseem ceeb los xyuas kom meej qhov kev ua haujlwm zoo ntawm cov txheej txheem kho. Corrosion - resistant cov ntaub ntawv yuav tsum tau siv rau cov khoom nyob rau hauv kev sib cuag nrog sodium sulfide cov dej khib nyiab kom ntev lub neej kev pab cuam ntawm cov khoom.

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.