Ucwaningo ngokwelashwa kwamanzi e-copper-arsenic waste acid ane-sodium hydrosulfide esikhundleni se-sodium sulfide

Isingeniso

Ucwaningo lubonisa ukuthi ukwelashwa kwe-asidi yemfucumfucu yethusi ne-arsenic isebenzisa inqubo ehlanganisa imvula ye-sulfide, elandelwa ukungezwa kwe-gypsum kanye ne-electrochemical neutralization, ekugcineni okuholela ekukhishweni okuzinzile okuhlangabezana nezindinganiso zokulawula. Esinyathelweni semvula ye-sulfide, a i-sodium sulfide Isixazululo esine-mass concentration engu-26% sifakwa ngokuzenzakalelayo ku-asidi yemfucuza yethusi ne-arsenic ngaphansi kwezimo ezithile ze-asidi, okuholela ekwakhekeni kwe-CuS kanye ne-As2S3 precipitates ukuze kukhishwe ama-ion ethusi ne-arsenic esigabeni se-liquid. Ekukhiqizweni kwangempela, isisombululo se-sodium sulfide siqukethe amazinga aphezulu okungcola okungancibiliki, futhi lapho sichayeka emoyeni, kancane kancane siya oxidize senze i-thiosulfate. Ukwengeza, inezinga lokushisa eliphezulu le-crystallization, phakathi kwezinye izithiyo. Ngakho-ke, ukuthola i-ejenti entsha ye-sulfide esikhundleni se-sodium sulfide kungabaluleka kakhulu.

I-Sodium Hydrosulfide eqinile

Inqubo Isimiso

Ivinjelwa inqubo ekhona yokumuncwa ngokweqile kwe-H2S, ukwelashwa kwe-asidi yethusi ne-arsenic equkethe imfucuza kusetshenziswa. I-sodium hydrosulfide iqhutshwa ngokusekelwe kumathuluzi amanje kanye nokugeleza kwenqubo ye-sulfuric acid workshop's waste acid kanye namanzi angcolile. Le ndlela isebenzisa isisombululo esixubile se-sodium hydrosulfide ne-sodium sulfide ekwelapheni.

Ukugeleza kwenqubo

Umfanekiso we-1 ubonisa umdwebo wokugeleza kwenqubo yokwelashwa kwe-asidi engcolile yethusi ne-arsenic kusetshenziswa i-sodium hydrosulfide. Isixazululo se-asidi yemfucuza, ngemva kokususwa kwe-SO2 embhoshongweni wokuhlubula, singena ethangini lokusabela le-sodium hydrosulfide ukusuka phezulu. Isixazululo esixubile se-sodium hydrosulfide ne-sodium sulfide yengezwa kusukela phansi kwethangi lokusabela. Ngaphansi kwezimo ezine-acidic, igesi ye-H2S iyakhiqizwa futhi iyakhuphuka kancane kancane, isabela ngethusi ne-arsenic kusukela phezulu kuya phansi ukuze yakhe i-CuS ne-As2S3 precipitates. Lezi zimvula zibe sezichichima ku-thickener yethusi ukuze kunciphe. I-supernatant ithunyelwa kunqubo yokwelashwa kwe-gypsum, kuyilapho udaka olungaphansi luchithwa emanzini okuhlunga ngaphambi kokuthunyelwa ukuze kuqhutshekwe nokucubungula. Inani elincane le-H2S elingaphenduliwe lidonswa ipayipi elicindezelayo elingalungile embhoshongweni wokuqeda ubuthi, lapho limuncwa isixazululo esixubile esijikelezayo se-sodium hydrosulfide ne-sodium sulfide, iqinisekisa ukuthi ihlangabezana nezindinganiso zokukhipha.

Indlela Yokuhlola

Imodi yokukhiqiza eqhubekayo iyamukelwa, nezinye izinqubo nemingcele yokulawula ehlala ingashintshiwe. I-sodium hydrosulfide isabela ngokushesha kune-sodium sulfide; uma ukuhlushwa kuphakeme kakhulu, inani elikhulu le-hydrogen sulfide (H2S) likhiqizwa ngokushesha ngaphansi kwezimo ezine-asidi. Ngaphandle kokusabela ngenye yethusi ne-arsenic ku-asidi yemfucuza, i-hydrogen sulfide eningi ngokweqile izophunyuka endaweni ewuketshezi ngenxa yokuyaluza kwe-paddle enyakazayo futhi idonswe ukucindezela okungalungile kumbhoshongo wokuqeda ubuthi. Inqubo ekhona isebenzisa i-sodium sulfide ukuze imunce i-hydrogen sulfide eyeqile ekhiqizwa ngesikhathi sokusabela kwe-sulfide (Na2S + H2S = 2NaHS). Ngemuva kokusetshenziswa kwesivivinyo se-sodium hydrosulfide, ithangi lokugcina i-sodium sulfide liqukethe i-sodium hydrosulfide, enciphisa amandla ayo okumunca i-hydrogen sulfide eyeqile. Ukuze uvimbele ukumuncwa okungaphelele kwe-hydrogen sulfide, okungaholela ekukhishweni okungahambisani nemithetho evela embhoshongweni wokuqeda ubuthi, amanzi (acondensate asuka kumusi wokushisa wethangi le-sodium sulfide yokugcina) engezwa ethangini lokugcina i-sodium sulfide ngesikhathi sokuhlolwa ukuze kugcinwe ukugcwala kwesisombululo esixubile se-sodium sulfide ne-sodium hydrosulfide cishe ku-15%.

Isiphetho

1. Ngemva kokusebenzisa isixazululo esixubile se-sodium hydrosulfide kanye ne-sodium sulfide, izindleko ze-reagent yokwelapha i-cubic meter ye-waste acid ziyancipha zibe ngu-52.5% waleyo ye-sodium sulfide ehlanzekile, okuholela ezinzuzweni ezinkulu zezomnotho.

2. Ukusetshenziswa kwesisombululo esixubile se-sodium hydrosulfide ne-sodium sulfide akuzange kuthinte izinkomba zokukhishwa kwe-workshop; izindinganiso zokuchithwa kwamanzi angcolile zihlala zizinzile futhi zihambisana.

3. Ngenxa yokusetshenziswa okuxubile kwe-sodium sulfide ne-sodium hydrosulfide, kanye nenqubo ekhona yombhoshongo wokukhipha ubuthi engashintshiwe, azikho izimo zokungathobeli imithetho ekhishwayo evela embhoshongweni wokuqeda ubuthi.