2. Impembelelo yomgangatho we-gypsum slurry

1 Uxinano lwe-slurry

Ubungakanani boxinano lwe-slurry bubonisa uxinano lwe-slurry kwinqaba yokufunxa. Ukuba uxinano luncinci kakhulu, kuthetha ukuba umxholo we-CaSO4 kwi-slurry uphantsi kwaye umxholo we-CaCO3 uphezulu, nto leyo ebangela ngokuthe ngqo inkunkuma ye-CaCO3. Kwangaxeshanye, ngenxa yamasuntswana amancinci e-CaCO3, kulula ukubangela ubunzima bokuphelelwa ngamanzi emzimbeni nge-gypsum; ukuba uxinano lwe-slurry lukhulu kakhulu, kuthetha ukuba umxholo we-CaSO4 kwi-slurry uphezulu. I-CaSO4 ephezulu iya kuthintela ukunyibilika kwe-CaCO3 kwaye ithintele ukufunxwa kwe-SO2. I-CaCO3 ingena kwinkqubo yokufunxwa kwamanzi nge-gypsum slurry kwaye ikwachaphazela nesiphumo sokuphelelwa ngamanzi emzimbeni nge-gypsum. Ukuze kusetyenziswe ngokupheleleyo iingenelo zenkqubo yokujikeleziswa kwamanzi kabini ene-double-tower ye-wet flue gas desulfurization, ixabiso le-pH lenqaba yokuqala kufuneka lilawulwe ngaphakathi koluhlu lwe-5.0±0.2, kwaye uxinano lwe-slurry kufuneka lulawulwe ngaphakathi koluhlu lwe-1100±20kg/m3. Xa isebenza ngokwenene, uxinano lwe-slurry kwinqaba yesigaba sokuqala sesityalo lumalunga ne-1200kg/m3, kwaye lufikelela nakwi-1300kg/m3 ngamaxesha aphezulu, nto leyo ehlala ilawulwa kwinqanaba eliphezulu.

2. Umlinganiselo wokunyanzeliswa kwe-oxidation ye-slurry

Ukuxiliswa okunyanzelekileyo kweslurry kukungenisa umoya owaneleyo kwislurry ukuze i-oxidation ye-calcium sulfite kwi-calcium sulfate reaction idla ngokuphelela, kwaye izinga le-oxidation liphezulu kune-95%, okuqinisekisa ukuba kukho iintlobo ze-gypsum ezaneleyo kwislurry ukuze kukhule ikristale. Ukuba i-oxidation ayanelanga, iikristale ezixutyiweyo ze-calcium sulfite kunye ne-calcium sulfate ziya kuveliswa, nto leyo ebangela ukuba kubekho umlinganiselo. Umlinganiselo we-oxidation enyanzelekileyo yeslurry uxhomekeke kwizinto ezifana nobungakanani bomoya we-oxidation, ixesha lokuhlala kweslurry, kunye nesiphumo sokuxutywa kweslurry. Umoya we-oxidation onganelanga, ixesha elifutshane kakhulu lokuhlala kweslurry, ukusasazwa okungalinganiyo kweslurry, kunye nesiphumo sokuxutywa esibi konke oku kuya kubangela ukuba umxholo we-CaSO3·1/2H2O kwinqaba ube phezulu kakhulu. Kuyabonakala ukuba ngenxa yokungoneli kwe-oxidation yendawo, umxholo we-CaSO3·1/2H2O kwislurry uphezulu kakhulu, nto leyo ebangela ubunzima ekuphelelweni yi-gypsum kunye nomxholo wamanzi ophezulu.

3. Ubungakanani bokungcola kwi-slurry Ubungakanani bokungcola kwi-slurry buvela kakhulu kwi-flue gas kunye ne-limestone. Ezi zinto zingcolileyo zenza ii-ions zokungcola kwi-slurry, zichaphazela isakhiwo se-lattice ye-gypsum. Iintsimbi ezinzima ezinyibilikiswa rhoqo emsini ziya kuthintela impendulo ye-Ca2+ kunye ne-HSO3-. Xa umxholo we-F- kunye ne-Al3+ kwi-slurry uphezulu, i-fluorine-aluminium complex AlFn iya kuveliswa, igubungele umphezulu wee-particles ze-limestone, ibangele ityhefu ye-slurry, inciphise ukusebenza kwe-desulfurization, kwaye ii-particles ze-limestone ezintle zixutywa kwiikristale ze-gypsum ezingaphendulwanga ngokupheleleyo, okwenza kube nzima ukunyibilikisa i-gypsum. I-Cl-slurry ikakhulu ivela kwi-HCl kwi-flue gas kunye namanzi enkqubo. Ubungakanani be-Cl- emanzini enkqubo buncinci, ngoko ke i-Cl-slurry ikakhulu ivela kwi-flue gas. Xa kukho isixa esikhulu se-Cl-in slurry, i-Cl- iya kusongwa ngeekristale ize idityaniswe nesixa esithile se-Ca2+ kwi-slurry ukuze kwenziwe i-CaCl2 ezinzileyo, ishiye isixa esithile samanzi kwiikristale. Kwangaxeshanye, isixa esithile se-CaCl2 kwi-slurry siya kuhlala phakathi kweekristale ze-gypsum, sivale umjelo wamanzi akhululekileyo phakathi kweekristale, nto leyo ebangela ukuba umthamo wamanzi we-gypsum unyuke.

3. Impembelelo yesimo sokusebenza kwezixhobo

1. Inkqubo yokukhupha amanzi kwi-gypsum. I-gypsum slurry ipompelwa kwi-gypsum cyclone ukuze ikhuphe amanzi emzimbeni ngepompo yokukhupha i-gypsum. Xa i-slurry esezantsi ixinene ukuya kumxholo oqinileyo omalunga ne-50%, igeleza iye kwi-vacuum belt conveyor ukuze ikhuphe amanzi emzimbeni okwesibini. Izinto eziphambili ezichaphazela isiphumo sokwahlulwa kwe-gypsum cyclone luxinzelelo lokungena kwe-cyclone kunye nobukhulu be-sand setting nozzle. Ukuba uxinzelelo lokungena kwe-cyclone luphantsi kakhulu, isiphumo sokwahlulwa kwe-solid-liquid siya kuba sibi, i-slurry esezantsi iya kuba nomxholo oqinileyo omncinci, oya kuchaphazela isiphumo sokuphelelwa ngamanzi kwi-gypsum kwaye wonyuse umxholo wamanzi; ukuba uxinzelelo lokungena kwe-cyclone luphezulu kakhulu, isiphumo sokwahlulwa siya kuba ngcono, kodwa siya kuchaphazela ukusebenza kakuhle kwe-cyclone kwaye sibangele ukuguguleka okukhulu kwizixhobo. Ukuba ubungakanani be-sand setting nozzle bukhulu kakhulu, kuya kubangela ukuba i-slurry esezantsi ibe nomxholo oqinileyo omncinci kunye namasuntswana amancinci, okuya kuchaphazela isiphumo sokuphelelwa ngamanzi kwi-vacuum belt conveyor.

I-vacuum ephezulu kakhulu okanye ephantsi kakhulu iya kuchaphazela isiphumo sokuphelelwa ngamanzi emzimbeni kwi-gypsum. Ukuba i-vacuum iphantsi kakhulu, amandla okukhupha umswakama kwi-gypsum aya kuncipha, kwaye isiphumo sokuphelelwa ngamanzi emzimbeni kwi-gypsum siya kuba sibi kakhulu; ukuba i-vacuum iphezulu kakhulu, izikhewu kwilaphu lesihluzo zinokuvalwa okanye ibhanti ingaphambuka, nto leyo eya kukhokelela kwisiphumo sokuphelelwa ngamanzi emzimbeni kwi-gypsum. Phantsi kweemeko ezifanayo zokusebenza, kokukhona ukungena komoya kwilaphu lesihluzo kungcono, kokukhona isiphumo sokuphelelwa ngamanzi emzimbeni kwi-gypsum singcono; ukuba ukungena komoya kwilaphu lesihluzo kuphantsi kwaye umjelo wesihluzo uvaliwe, isiphumo sokuphelelwa ngamanzi emzimbeni kwi-gypsum siya kuba sibi kakhulu. Ubukhulu bekhekhe lesihluzo bukwanefuthe elibalulekileyo ekuphelelweni kwamanzi emzimbeni kwi-gypsum. Xa isantya sokuhanjiswa kwebhanti sincipha, ubukhulu bekhekhe lesihluzo buyanda, kwaye amandla epompo yesihluzo sokukhupha umaleko ongaphezulu wekhekhe lesihluzo ayancipha, nto leyo ebangela ukwanda komxholo wokufuma kwe-gypsum; xa isantya sokuhanjiswa kwebhanti sisanda, ubukhulu bekhekhe lesihluzo buyancipha, nto leyo elula ukubangela ukuvuza kwekhekhe lesihluzo lendawo, ukutshabalalisa i-vacuum, kwaye ibangele ukwanda komxholo wokufuma we-gypsum.

2. Ukusebenza okungaqhelekanga kwenkqubo yokucoca amanzi amdaka e-desulfurization okanye umthamo omncinci wokucoca amanzi amdaka kuya kuchaphazela ukukhutshwa okuqhelekileyo kwamanzi amdaka e-desulfurization. Phantsi kokusebenza kwexesha elide, ukungcola okufana nomsi nothuli kuya kuqhubeka kungena kwi-slurry, kwaye iintsimbi ezinzima, i-Cl-, i-F-, i-Al-, njl. kwi-slurry ziya kuqhubeka nokutyeba, okubangela ukuwohloka okuqhubekayo komgangatho we-slurry, okuchaphazela inkqubela eqhelekileyo yempendulo ye-desulfurization, ukwakheka kwe-gypsum kunye nokuphelelwa ngamanzi emzimbeni. Ukuthatha i-Cl-in slurry njengomzekelo, umxholo we-Cl- kwi-slurry ye-first-level absorption tower yesityalo samandla uphezulu njenge-22000mg/L, kwaye umxholo we-Cl- kwi-gypsum ufikelela kwi-0.37%. Xa umxholo we-Cl- kwi-slurry umalunga ne-4300mg/L, isiphumo sokuphelelwa ngamanzi emzimbeni se-gypsum siba ngcono. Njengoko umxholo we-chloride ion usanda, isiphumo sokuphelelwa ngamanzi emzimbeni se-gypsum siyawohloka kancinci kancinci.