Bhodhi redunhu rinogona kunzi bhodhi redunhu rakadhindwa kana bhodhi redunhu rakadhindwa, uye zita rechirungu ndiPCB. Kuumbwa kwePCB tsvina yemvura yakaoma uye yakaoma kurapa. Nzira yekubvisa sei zvinokuvadza zvinhu uye kuderedza kusvibiswa kwezvakatipoteredza ibasa guru rakatarisana neindasitiri yePCB yenyika yangu.
PCB wastewater is PCB wastewater, inova rudzi rwemvura yakaraswa mumvura inoraswa kubva kuindasitiri yekudhinda nemafekitori ebhodhi redunhu. Parizvino, kugadzirwa kwepagore kwenyika kwemarara ane chepfu uye ane ngozi anosvika 300 kusvika ku400 mamiriyoni ematani. Pakati pazvo, zvinoramba zvichisvibisa organic (POPs) ndizvo zvakanyanya kukuvadza kune ecology uye zvakanyanya kupararira pasi. Pamusoro pezvo, PCB mvura yetsvina yakakamurwa kuita: Kuchenesa mvura yetsvina, inki tsvina, mvura yetsvina yakaoma, yakaomeswa neasidhi tsvina yemvura, yakaomeswa alkali tsvina yemvura, nezvimwewo. uye zvikamu zvakaoma. Zvinoenderana nehunhu hwemvura yetsvina yevagadziri vePCB vakasiyana, kurongedza zvine musoro uye kuunganidza uye kurapwa kwemhando yepamusoro ndiyo kiyi yekuona kuti kurapwa kwemvura yetsvina kunosangana nezviyero.
Kugadziriswa kwemvura yetsvina muPCB board indasitiri, kune nzira dzemakemikari (kunaya kwemakemikari, ion exchange, electrolysis, nezvimwewo), nzira dzemuviri (yakasiyana-siyana decantation nzira, filtration nzira, electrodialysis, reverse osmosis, nezvimwewo). Kemikari nzira ndeye Izvo zvinosvibisa zvinoshandurwa kuita zviri nyore kupatsanurwa (yakasimba kana gasi). Iyo yemuviri nzira ndeyekupfumisa zvinosvibisa mumvura yetsvina kana kupatsanura zviri nyore kupatsanurwa kubva mumvura yakaraswa kuita kuti mvura yetsvina isangane neinobuda mwero. Nzira dzinotevera dzinogamuchirwa kumba nekune dzimwe nyika.
1. Decantation nzira
Iyo decantation nzira ndiyo nzira yekusefa, inova imwe yenzira dzemuviri muPCB board industry indasitiri yetsvina yekurapa nzira. Mvura yekugezesa ine zvimedu zvemhangura inoburitswa pamushini wekubvisa inogona kusefa kubvisa zvimedu zvemhangura mushure mekurapwa nedecanter. Iyo tsvina yakasefa ne decanter inogona kushandiswa zvakare semvura yekuchenesa yemushini weburr.
2. Chemical Law
Nzira dzemakemikari dzinosanganisira nzira dzekudzikisa oxidation uye nzira dzekunaya kwemakemikari. Nzira yekudzikisa oxidation inoshandisa maoxidants kana zvinodzikisa zvinhu kushandura zvinhu zvinokuvadza kuita zvisingakuvadze kana zvinhu zviri nyore kunayisa nekunaya. Iyo cyanide-ine tsvina yemvura uye chromium-ine tsvina yemvura mubhodhi redunhu inowanzoshandisa nzira yekudzikisa oxidation, ona tsanangudzo inotevera yeruzivo.
Iyo kemikari yekunaya kwemakemikari inoshandisa imwe kana akati wandei makemikari ejenti kushandura zvinhu zvinokuvadza kuita sediments zviri nyore kupatsanurwa kana mvura. Kune marudzi akawanda emakemikari anoshandiswa mudhipatimendi rekuchenesa mvura yetsvina, seNaOH, CaO, Ca(OH)2, Na2S, CaS, Na2CO3, PFS, PAC, PAM, FeSO4, FeCl3, ISX, nezvimwewo. shandura heavy metal ions muIyo sediment inobva yapfuudzwa neyakarerekera ndiro sedimentation tank, jecha sefa, PE sefa, filter press, nezvimwewo kuparadzanisa yakasimba uye mvura.
3. Chemical precipitation-ion exchange method
Chemical precipitation treatment ye high-concentration circuit board wastewater yakaoma kusangana nedischarge standard munhanho imwe, uye inowanzoshandiswa pamwe chete neion exchange. Chekutanga, shandisa makemikari kunaya nzira kurapa yakakwirira-concentration redunhu bhodhi mvura tsvina kuderedza zviri zvinorema simbi ions kusvika 5mg/L, uye ipapo kushandisa ion exchange nzira kuderedza heavy simbi ions kuti discharge mitemo.
4. electrolysis-ion exchange nzira
Pakati penzira dzekuchenesa mvura muPCB board indasitiri, iyo electrolysis nzira yekurapa yakakwira-concentration redunhu bhodhi mvura yakasvibiswa inogona kuderedza zviri mukati meheavy metal ions, uye chinangwa chayo chakafanana neyemakemikari mvura inonaya. Zvisinei, kukanganisa kweiyo electrolysis nzira ndeiyi: inoshanda chete pakurapa kwe-high-concentration heavy metal ions, kusungirirwa kunoderedzwa, ikozvino kunonyanya kuderedzwa, uye kubudirira kunonyanya kuderera; kushandiswa kwesimba kwakakura, uye zvakaoma kukurudzira; iyo electrolysis nzira inogona kungogadzira simbi imwe chete. Electrolysis-ion exchange method is copper plating, etching waste liquid, kune imwe tsvina yemvura, asi shandisawo dzimwe nzira kurapa.
5. makemikari nzira-membrane filtration nzira
Mvura yakaraswa yePCB board indasitiri yemabhizinesi inogadzirwa nemakemikari kuti iwedzere zvidimbu zvinosefa (dhayamita> 0.1μ) kubva kune zvinokuvadza, uye yobva yasefa kuburikidza nemembrane sefa mudziyo kuti isangane nemiyero yekuburitsa.
6. gaseous condensation-electric filtration method
Pakati penzira dzekuchenesa mvura yetsvina muPCB board indasitiri, gaseous condensation-electric filtration method inzira itsva yekuchenesa mvura yetsvina isina makemikari akagadzirwa neUnited States kuma1980s. Iyo inzira yemuviri yekurapa yakadhindwa yedunhu bhodhi tsvina yemvura. Inoumbwa nezvikamu zvitatu. Chikamu chekutanga ndeye ionized gasi jenareta. Mhepo inosvetwa mujenareta, uye chimiro chayo chemakemikari inogona kuchinjwa neiyo ionizing magineti kuti ive yakanyanya activated magineti okisijeni ion uye nitrogen ion. Iri gasi rinobatwa nejeti mudziyo. Yakapinzwa mumvura ine tsvina, iyo simbi yesimbi, organic matter uye zvimwe zvinhu zvinokuvadza mumvura ine tsvina zvakasvibiswa uye zvakabatanidzwa, izvo zviri nyore kusefa uye kubvisa; chikamu chechipiri ndeye electrolyte sefa, iyo inosefa uye inobvisa agglomerated zvinhu zvakagadzirwa muchikamu chekutanga; chikamu chechitatu ndeye-high-speed ultraviolet Irradiation device, ultraviolet rays mumvura inogona oxidize organics uye makemikari complexing agents, kuderedza CODcr uye BOD5. Parizvino, seti yakakwana yemidziyo yakabatanidzwa yakagadziridzwa kuti ishandiswe zvakananga.