Sodium sulfide Wastewater Treatment Methods and Precautions

Sodium sulfide tsvina yemvura, inogadzirwa kubva kwakasiyana siyana maindasitiri sekugadzira makemikari, migodhi, uye kugadzirwa kwepulp, inoisa njodzi dzakakura kwezvakatipoteredza uye hutano nekuda kwehupfu hwayo uye nekuora. Kunyatsogadzirisa mvura yetsvina iyi kwakakosha kuderedza kuipa kwayo. Iyi blog post inozivisa zvizere nzira dzekurapa uye akakosha ekudzivirira sodium sulfide tsvina yemvura.

1. Kurapa Nzira

1.1 Kunaya kweKemikari

Kunaya kwemakemikari ndeimwe yenzira dzinowanzoshandiswa pakurapa sodium sulfide tsvina. Muchiitiko ichi, simbi yesimbi yakadai sesimbi yemunyu (ferrous sulfate, ferric chloride) kana mhangura yemunyu inowedzerwa kumvura yakasviba. Iyo sulfide ions mu sodium sulfide inopindirana nesimbi ions, zvichiita kuti pave nekugadzirwa kwesimbi isina kunyungudika sulfide inonaya. Mushure mekuita kwemvura, kupatsanurwa kwakasimba - kwemvura kunoitwa kuburikidza nesedimentation kana kusefa, zvichinyatso kubvisa sulfide kubva mumvura yakaraswa. Iyi nzira iri nyore, inodhura-inoshanda, uye yakakodzera kurapa mvura yetsvina nepamusoro-concentration sulfide.

1.2 Oxidation Kurapa

Oxidation kurapwa inogona kushandura sulfide mu sodium sulfide tsvina yemvura kuita zvinhu zvishoma zvinokuvadza. Yakajairika oxidation nzira dzinosanganisira mhepo oxidation, chlorine oxidation, uye advanced oxidation maitiro (AOPs).

• Air Oxidation: Pamberi pezvinokonzeresa senge manganese dioxide, mweya unopinzwa mumvura yetsvina. Mumamiriro ezvinhu e-aerobic, sulfide yakasvibiswa kune elemental sulfur kana sulfate. Iyi nzira ine simba - inoshanda asi inoda nguva yakareba yekuita uye yakakodzera kuchenesa mvura ine tsvina ine yakaderera sulfide concentrations.

• Chlorine Oxidation: Chlorine - ine oxidants senge sodium hypochlorite kana chlorine gasi inoshandiswa kuita oxidize sulfide. Chlorine oxidation inokurumidza uye inoshanda, asi inogona kuburitsa zvinokuvadza ne-zvigadzirwa, saka kungwarira kutonga kwedosi kunodiwa.

• Yepamberi Oxidation Matanho (AOPs): MaAOP, akadai seFenton oxidation uye ozone oxidation, anogadzira yakanyanya reactive hydroxyl radicals. Aya radicals anogona kukurumidza oxidize sulfide uye kuita mineralize zvachose. Semuyenzaniso, Fenton oxidation inoshandisa hydrogen peroxide uye ferrous ions kugadzira hydroxyl radicals, inogona kunyatso kurapa yakaderera - uye yakakwirira-concentration sulfide tsvina.

1.3 Biological Treatment

Biological kurapwa kunoshandisa tupukanana kusvibisa sulfide mumvura ine tsvina. Anaerobic biological treatment, senge anaerobic digestion, inogona kushandura sulfide kuita gasi rehydrogen sulfide pasi peanaerobic mamiriro, ayo anogona kubva abviswa kuburikidza negasi-kuunganidza masisitimu. Aerobic biological treatment inosanganisira aerobic microorganisms iyo oxidize sulfide kuita sulfate sechikamu chemaitiro avo emetabolic. Kurapa kweBiological kunoenderana nenharaunda uye kwakasimba, asi kunoda kugadzikana kwemamiriro ekushanda uye nguva yakati rebei kurapwa.

2. Kuchengetedza

2.1 Kuchengetedza

• Sodium sulfide tsvina ine muchetura uye inogona kuburitsa muchetura wehydrogen sulfide gasi kana yasangana nemaasidhi kana mune mamwe mamiriro. Naizvozvo, panguva yekurapa, vashandi vanofanirwa kupfeka zvidziviriro zvavo zvakakodzera, zvinosanganisira masks egasi, magirovhosi, uye zvipfeko zvekudzivirira, kudzivirira kufemerwa uye kusangana kweganda nezvinhu zvine chepfu.

• Zvivako zvekurapa zvinofanirwa kunge zvine mhepo inofefetera kuti ive nechokwadi chekubuda kwehydrogen sulfide gasi, kuderedza njodzi yekuunganidzwa kwegasi uye kuputika. Kugara kuona gasi munzvimbo yekurapa kwakakosha kuti utarise huwandu hwehydrogen sulfide uye mamwe magasi anokuvadza.

2.2 Operational Precautions

• Reagent Dosage Control: In kunaya kwemakemikari uye oxidation kurapwa, kudzora kwakaringana kuyerwa kwemareagents kwakakosha. Kusakwana reagent dosage inogona kutungamira mukusakwana kurapwa, nepo yakawandisa dosi haingo wedzera mari yekurapa asi inogona kukonzera kusvibiswa kwechipiri. Semuenzaniso, mukunaya kwemakemikari, kuwanda kwesimbi yemunyu kunogona kukonzera kuvapo kweayoni esimbi akasara mumvura yakabikwa.

• pH Kudzora: Iyo pH kukosha kwemvura yakasviba inokanganisa zvakanyanya kurapa kwakanaka. Mukunaya kwemakemikari, simbi yakasiyana-siyana sulfide inonaya inoumba zvakakwana mukati meiyo pH siyana. Mukurapa oxidation, iyo oxidation reaction rate uye kuumbwa kwechigadzirwa zvakare zvine hukama nepH kukosha. Naizvozvo, kuenderera mberi kwekutarisa uye kugadzirisa kweiyo pH kukosha panguva yekurapa maitiro kunodiwa.

• Kugadziriswa Kwekushandisa+ Corrosion - zvinhu zvinodzivirira zvinofanirwa kushandiswa kumidziyo inosangana nesodium sulfide tsvina yemvura kuwedzera hupenyu hwebasa remidziyo.

2.3 Kuchengetedzwa Kwemamiriro Ekunze

• Madhaka anogadzirwa panguva yekurapa, kunyanya mukunaya kwemakemikari, ane huwandu hwakakura hwesimbi sulfide precipitates uye inogona kunge iine zvakasara reagents. Dope iri rinofanirwa kuraswa zvakanaka kudzivirira kusvibiswa kwechipiri. Inogona kutumirwa kune nyanzvi ine njodzi yekurapisa tsvina kuti iraswe zvakachengeteka.

• Mushure mekurapwa, kunaka kwemvura yakasviba kunofanirwa kutariswa zvakanyanya kuti ive nechokwadi chekuti inosangana neakakodzera nyika uye yemunharaunda yekuyerera kwenzvimbo. Kana iyo effluent quality isingaenderane nezvinodiwa, kumwe kurapwa kana kugadzirisa maitiro kunodiwa.

Mukupedzisa, kurapa sodium sulfide tsvina yemvura kunoda kunzwisiswa kwakazara kweakasiyana nzira dzekurapa uye kunyatsoteedzera matanho ekudzivirira. Nekusarudza nzira yakakodzera yekurapa uye nekutevera nzira dzekushanda dzakaringana, tinokwanisa kunyatso kudzikisa kukanganiswa kwezvakatipoteredza kwesodium sulfide tsvina yemvura uye nekubatsira kuchengetedza zvakatipoteredza kuchengetedza.