Nazari akan maganin sharar ruwan acid na jan karfe-arsenic tare da sodium hydrosulfide maimakon sodium sulfide

Gabatarwa

Bincike ya nuna cewa maganin jan ƙarfe da arsenic mai ɗauke da sharar acid yana amfani da tsarin da ya ƙunshi hazo sulfide, wanda ke biye da ƙari na gypsum da neutralization na electrochemical, a ƙarshe yana haifar da kwanciyar hankali wanda ya dace da ka'idoji. A cikin matakin hazo sulfide, a sodium sulfide Magani tare da taro mai yawa na 26% ana ƙara ta atomatik zuwa jan ƙarfe da arsenic-dauke da sharar gida a ƙarƙashin takamaiman yanayin acidity, wanda ya haifar da samuwar CuS da As2S3 don cire jan ƙarfe da ions arsenic daga lokaci na ruwa. A zahirin samarwa, maganin sodium sulfide yana ƙunshe da ƙananan matakan ƙazanta marasa narkewa, kuma lokacin da aka fallasa shi zuwa iska, sannu a hankali yana yin oxidize don samar da thiosulfate. Bugu da ƙari, yana da babban zafin jiki na crystallization, a tsakanin sauran abubuwan da ba a iya gani ba. Saboda haka, gano sabon wakili na sulfide don maye gurbin sodium sulfide zai zama muhimmiyar mahimmanci.

Sodium Hydrosulfide

Ƙa'idar Tsari

Ƙaddamar da tsarin sharar H2S da ke akwai, maganin jan ƙarfe da arsenic mai ɗauke da sharar gida ta amfani da Sodium hydrosulfide ana gudanar da shi bisa ga kayan aiki na yau da kullun da tsarin tafiyar da sharar acid da ruwan datti na taron bitar sulfuric acid. Wannan hanya tana amfani da gauraye bayani na sodium hydrosulfide da sodium sulfide don maganin.

Tsarin Tsarin

Hoto na 1 yana kwatanta zane-zanen tsarin tafiyar da aikin don maganin jan ƙarfe da arsenic mai ɗauke da sharar gida ta amfani da sodium hydrosulfide. Maganin acid ɗin sharar gida, bayan cire SO2 a cikin hasumiya mai cirewa, yana shiga cikin tankin amsawar sodium hydrosulfide daga sama. Ana ƙara gaurayen bayani na sodium hydrosulfide da sodium sulfide daga ƙasan tankin amsawa. A ƙarƙashin yanayin acidic, ana samar da iskar H2S kuma a hankali yana tashi, yana amsawa da jan karfe da arsenic daga sama zuwa sama don samar da CuS da As2S3. Wadannan hazo sai su yi ambaliya a cikin kaurin tagulla don lalatawa. An aika da maɗaukaki zuwa tsarin jiyya na gypsum, yayin da sludge na kasa ya zubar da ruwa a cikin injin tace kafin a aika shi don ƙarin aiki. Ana cire ƙaramin adadin H2S da ba a yi ba ta hanyar bututun matsa lamba mara kyau zuwa hasumiya ta detoxification, inda aka shafe ta ta hanyar haɗaɗɗun maganin gauraye na sodium hydrosulfide da sodium sulfide, yana tabbatar da cewa ya dace da matsayin fitarwa.

Hanyar Gwaji

Ana ɗaukar yanayin samar da ci gaba, tare da sauran matakai da sigogin sarrafawa waɗanda ba su canzawa. Sodium hydrosulfide yana amsawa da sauri fiye da sodium sulfide; idan maida hankali yana da girma, babban adadin hydrogen sulfide (H2S) yana haifar da sauri a ƙarƙashin yanayin acidic. Baya ga amsawa da wasu daga cikin jan ƙarfe da arsenic a cikin sharar acid, ɗan ƙaramin hydrogen sulfide zai tsere daga saman ruwa saboda tashin hankalin filafin mai motsawa kuma za a cire shi ta mummunan matsa lamba zuwa hasumiya mai lalata. Tsarin da ake da shi yana amfani da sodium sulfide don ɗaukar wuce haddi na hydrogen sulfide da aka haifar yayin amsawar sulfide (Na2S + H2S = 2NaHS). Bayan gwajin amfani da sodium hydrosulfide, tankin ajiyar sodium sulfide yana ƙunshe da wasu sodium hydrosulfide, wanda ke rage ikonsa na ɗaukar wuce haddi na hydrogen sulfide. Don hana rashin cika sha na hydrogen sulfide, wanda zai iya haifar da rashin yarda da watsi da hasumiyar detoxification, ruwa (condensate daga dumama tururi na sodium sulfide ajiya tank) an kara zuwa sodium sulfide ajiya tank a lokacin gwaji don kula da taro na gauraye bayani na sodium sulfide da sodium hydrosulfide a kusan 15%.

Kammalawa

1. Bayan amfani da wani gauraye bayani na sodium hydrosulfide da sodium sulfide, reagent farashin kula da cubic mita na sharar gida acid an rage zuwa 52.5% na na tsantsa sodium sulfide, haifar da gagarumin tattalin arziki fa'idodin.

2. Yin amfani da maganin gauraye na sodium hydrosulfide da sodium sulfide bai shafi alamun fitarwa na taron ba; Ka'idojin fitar da ruwan sha sun kasance masu karko da bin doka.

3. Saboda gaurayawan amfani da sodium sulfide da sodium hydrosulfide, kuma tare da tsarin hasumiya na detoxification ba a canza ba, ba a sami wasu lokuta na rashin yarda ba a cikin hayaki daga hasumiya mai lalata.