Kwinkqubo yokukhupha i-limestone-gypsum wet flue gas desulfurization, ukugcina umgangatho we-slurry kubalulekile ekusebenzeni ngokukhuselekileyo nangokuzinzileyo kwenkqubo yonke. Oku kuchaphazela ngokuthe ngqo ubomi bezixhobo, ukusebenza kakuhle kwe-desulfurization, kunye nomgangatho wemveliso ephumayo. Izikhululo zamandla ezininzi aziyithathi lula impembelelo ye-chloride ions kwi-slurry kwinkqubo ye-FGD. Apha ngezantsi kukho iingozi ze-chloride ions ezigqithisileyo, imithombo yazo, kunye namanyathelo okuphucula acetyiswayo.
I. Iingozi zeChloride Ions ezigqithisileyo
1. Ukugqwala Okukhawulezileyo Kweenxalenye Zesinyithi Kwi-Absorber
- Ii-ion ze-chloride zidla intsimbi engagqwaliyo, ziqhekeza umaleko we-passivation.
- Ubuninzi beCl⁻ buyayithoba i-pH ye-slurry, nto leyo ekhokelela kwi-metal corrosion, i-crevice corrosion, kunye ne-stress corrosion. Oku konakalisa izixhobo ezifana nee-slurry pumps kunye nee-agitators, nto leyo enciphisa kakhulu ubomi bazo.
- Ngexesha loyilo lwe-absorber, uxinaniso lwe-Cl⁻ oluvumelekileyo luyinto ephambili ekufuneka iqwalaselwe. Ukunyamezelana okuphezulu kwe-chloride kufuna izixhobo ezingcono, nto leyo enyusa iindleko. Ngokwesiqhelo, izixhobo ezifana ne-2205 stainless steel zinokuphatha uxinaniso lwe-Cl⁻ ukuya kuthi ga kwi-20,000 mg/L. Kuxinaniso oluphezulu, kucetyiswa izixhobo eziqinileyo ezifana ne-Hastelloy okanye i-nickel-based alloys.
2. Ukusetyenziswa kweSlurry okuncitshisiweyo kunye nokusetyenziswa kweReagent/Energy okwandisiweyo
- Iikloridi zihlala zikhona njenge-calcium chloride kwi-slurry. Uxinzelelo oluphezulu lwee-ion ze-calcium, ngenxa yesiphumo esiqhelekileyo se-ion, luthintela ukunyibilika kwelitye lekalika, lunciphise i-alkalinity kwaye luchaphazele impendulo yokususwa kwe-SO₂.
- Ii-ion ze-chloride zikwathintela ukufunxwa kwe-SO₂ ngokwasemzimbeni nangokweekhemikhali, nto leyo enciphisa ukusebenza kakuhle kwe-desulfurization.
- I-Cl⁻ engaphezulu inokubangela ukwakheka kwamaqamza kwi-absorber, okukhokelela ekuphuphumeni kwamanzi, ukufundwa kwamanqanaba olwelo olungeyonyani, kunye nokuxinana kwepompo. Oku kunokubangela nokuba kubekho ukutyibilika okungene kwi-flue gas duct.
- Uxinzelelo oluphezulu lwe-chloride lunokubangela iimpembelelo ezinamandla ze-complexation kwiisinyithi ezifana ne-Al, i-Fe, kunye ne-Zn, okunciphisa ukusebenza kwe-CaCO₃ kwaye ekugqibeleni kunciphisa ukusebenza kakuhle kokusetyenziswa kwe-slurry.
3. Ukuwohloka koMgangatho weGypsum
- Ubuninzi beCl⁻ kwi-slurry buthintela ukunyibilika kwe-SO₂, nto leyo ekhokelela kumxholo ophezulu weCaCO₃ kwi-gypsum kunye neempawu ezimbi zokukhupha amanzi.
- Ukuze kuveliswe i-gypsum esemgangathweni ophezulu, kufuneka amanzi okuhlamba ongezelelweyo, okudala umjikelo onzima kunye nokwandisa ukuxinana kwe-chloride emanzini amdaka, nto leyo eyenza kube nzima ukunyanga kwawo.
II. Imithombo yee-Ion zeChloride kwi-Absorber Slurry
1. Ii-FGD Reagents, Amanzi okuthambisa, kunye namalahle
- Iikloridi zingena kwinkqubo ngezi zinto zifakwayo.
2. Ukusebenzisa i-Cooling Tower Blowdown njengeNkqubo yamanzi
- Amanzi aphumayo adla ngokuba ne-550 mg/L ye-Cl⁻, nto leyo enegalelo ekuqokeleleni kwe-Cl⁻ etyibilikayo.
3. Ukusebenza kakubi kwe-Electrostatic Precipitator
- Amasuntswana othuli andayo angena kwi-absorber athwala ii-chloride, ezinyibilika kwi-slurry kwaye ziqokelelane.
4. Ukukhutshwa kwamanzi amdaka okunganelanga
- Ukungaphumeleli ukukhupha amanzi amdaka asuswa kwi-sulfurization ngokweemfuno zoyilo kunye nokusebenza kukhokelela ekuqokeleleni kwe-Cl⁻.
III. Amanyathelo okulawula ii-Ion zeChloride kwi-Absorber Slurry
Eyona ndlela isebenzayo yokulawula i-Cl⁻ egqithisileyo kukunyusa ukukhutshwa kwamanzi amdaka asuswayo kwi-desulfurization ngelixa kuqinisekiswa ukuthotyelwa kwemigangatho yokukhutshwa. Amanye amanyathelo acetyiswayo aquka:
1. Sebenzisa kakuhle amanzi acocekileyo
- Nciphisa ixesha lokujikeleza kwamanzi kwi-filtrate kwaye ulawule ukungena kwamanzi apholisayo okanye amanzi emvula kwinkqubo ye-slurry ukuze ugcine ulungelelwano lwamanzi.
2. Nciphisa Amanzi Okuhlamba eGypsum
- Nciphisa umxholo we-gypsum Cl⁻ ube kuluhlu olufanelekileyo. Yandisa ukususwa kwe-Cl⁻ ngexesha lokukhupha amanzi ngokutshintsha i-slurry nge-gypsum slurry entsha xa amanqanaba e-Cl⁻ edlula i-10,000 mg/L. Jonga amanqanaba e-slurry Cl⁻ nge-imitha yoxinano olusemgcenikwaye ulungise amazinga okukhupha amanzi amdaka ngokufanelekileyo.
3. Qinisa ukuBekwa kweliso kweChloride
- Vavanya rhoqo umxholo we-slurry chloride kwaye ulungise imisebenzi ngokusekelwe kumanqanaba e-coal sulfur, ukuhambelana kwezinto, kunye neemfuno zenkqubo.
4. Ulawulo lobuninzi be-slurry kunye ne-pH
- Gcina uxinano lwe-slurry luphakathi kwe-1080–1150 kg/m³ kunye ne-pH phakathi kwe-5.4–5.8. Yehlisa i-pH rhoqo ukuze uphucule iimpendulo ngaphakathi kwi-absorber.
5. Qinisekisa ukuba ii-Electrostatic Precipitators zisebenza kakuhle
- Nqanda amasuntswana othuli aphethe i-chloride ephezulu ukuba angangeni kwi-absorber, ebeya kunyibilika aze aqokelele kwi-slurry.
Isiphelo
Ii-ion ze-chloride ezingaphezulu zibonisa ukukhutshwa kwamanzi amdaka okunganelanga, okukhokelela ekunciphiseni ukusebenza kakuhle kwe-desulfurization kunye nokungalingani kwenkqubo. Ulawulo lwe-chloride olusebenzayo lunokuphucula kakhulu uzinzo kunye nokusebenza kakuhle kwenkqubo. Ukuze ufumane izisombululo ezilungiselelwe wena okanye zamaILonnmeterIimveliso zika-'s ezinenkxaso yobungcali yokulungisa iimpazamo kude, nxibelelana nathi ukuze ufumane ingcebiso yasimahla malunga nezisombululo zokulinganisa uxinano lwe-slurry.
Ixesha leposi: Jan-21-2025
