UKUDULA IGASI OKUMNZI NGOKUHLANGANISA UMLIME/I-LIMESTONE

Izici

• Ukusebenza kahle kwe-Desulphurisation ngaphezu kwama-99% kungazuzwa
• Ukutholakala okungaphezu kwama-98% kungazuzwa
• Ubunjiniyela abuncikile kunoma iyiphi indawo ethile
• Umkhiqizo othengisekayo
• Umsebenzi wokulayisha ingxenye engenamkhawulo
• Indlela enenani elikhulu lezithenjwa emhlabeni

Izigaba Zenqubo

Izigaba zenqubo ezibalulekile zale ndlela ye-wet desulphurisation yilezi:

• Ukulungiswa kwe-Absorbent kanye nomthamo
• Ukususwa kwe-SOx (HCl, HF)
• Ukukhipha amanzi kanye nesimo somkhiqizo

Ngale ndlela, i-limestone (CaCO3) noma i-quicklime (CaO) ingasetshenziswa njengesimunyiso. Ukukhethwa kwesithasiselo esingangezwa somile noma njengesidaka kwenziwa ngesisekelo semibandela yemingcele eqondene nephrojekthi. Ukususa ama-sulfur oxides (SOx) nezinye izakhi ezine-asidi (HCl, HF), igesi ye-flue ilethwa ekuthinteni okujulile nge-slurry equkethe okungeziwe endaweni yokumuncwa. Ngale ndlela, indawo enkulu kunazo zonke engenzeka iyatholakala ukuze idluliselwe ngobuningi. Endaweni yokumunca, i-SO2 evela ku-flue gas isabela nokumunca ukwenza i-calcium sulphite (CaSO3).

I-limestone slurry equkethe i-calcium sulphite iqoqwa ku-absorber sump. I-limestone esetshenziselwa ukuhlanza amagesi e-flue yengezwa ngokuqhubekayo ku-absorber sump ukuqinisekisa ukuthi umthamo wokuhlanza we-absorber uhlala njalo. I-slurry bese iphonswa endaweni yokumunca futhi.

Ngokuvuthela umoya ku-absorber sump, i-gypsum yakhiwa kusuka ku-calcium sulphite futhi isuswa enkambisweni njengengxenye ye-slurry. Ngokuya ngezidingo zekhwalithi zomkhiqizo wokugcina, ukwelashwa okwengeziwe kuyenziwa ukukhiqiza i-gypsum ethengiswayo.

Ubunjiniyela Bezitshalo

Ku-wet flue gas desulphurisation, i-open spray tower absorbers iphumelele ehlukaniswe izingxenye ezimbili eziyinhloko. Lawa indawo yokumunca evezwe kugesi othululwayo kanye ne-absorber sump, lapho i-limestone slurry ivaleleka futhi iqoqwe. Ukuvimbela amadiphozi ku-absorber sump, i-slurry imisiwe ngokusebenzisa izindlela zokuxuba.

I-flue gas igelezela ku-absorber ngaphezu kwezinga loketshezi bese idlulela endaweni yokumunca, ehlanganisa amazinga okufafaza agqagqene kanye nesinqamuli senkungu.

I-limestone slurry emuncwa ku-absorber sump ifafazwa kahle ngokuhlanganyela futhi iphikisana negesi ephumayo ngokusebenzisa amazinga okufafaza. Ukuhlelwa kwemibhobho embhoshongweni wokufafaza kubalulekile ekukhipheni kahle kwesibambisi. Ngakho-ke ukuthuthukiswa kokugeleza kuyadingeka kakhulu. Kusinqamuli senkungu, amathonsi athathwe endaweni yokumunca igesi ephumayo abuyiselwa kunqubo. Ekuphumeni kwe-absorber, igesi ehlanzekile igcwele futhi ingasuswa ngokuqondile ngombhoshongo wokupholisa noma isitaki esimanzi. Uma ukhetha igesi ehlanzekile ingashiswa futhi ihanjiswe esitakini esomile.

I-slurry ekhishwe ku-absorber sump ikhishwa kuqala ngamanzi ngendlela yama-hydrocyclone. Ngokuvamile loludaka olugxilile luphinde lukhishwe amanzi ngokuhlunga. Amanzi, atholakala kule nqubo, angabuyiselwa kakhulu ku-absorber. Ingxenye encane isuswa ohlelweni lokujikeleza kwegazi ngendlela yokugeleza kwamanzi angcolile.

I-flue gas desulphurisation ezitshalweni zezimboni, izimboni zikagesi noma izimboni zokushiswa kwemfucuza kuncike emibhobho eqinisekisa ukusebenza okunembayo esikhathini eside futhi imelana nezimo zemvelo ezinolaka kakhulu. Ngezinhlelo zayo ze-nozzle, i-Lechler inikeza izixazululo ezisebenzayo neziqondiswe ekusetshenzisweni zokukhuhla izifutho noma izifutho zokufutha kanye nezinye izinqubo ku-flue gas desulphurisation (FGD).

I-desulphurization emanzi