2. Kev cuam tshuam ntawm gypsum slurry zoo

1 Qhov ceev ntawm cov slurry

Qhov loj ntawm cov slurry density qhia txog qhov ceev ntawm cov slurry hauv lub pej thuam nqus. Yog tias qhov ceev me dhau, nws txhais tau tias CaSO4 cov ntsiab lus hauv cov slurry qis thiab CaCO3 cov ntsiab lus siab, uas ncaj qha ua rau CaCO3 pov tseg. Tib lub sijhawm, vim yog cov khoom me me CaCO3, nws yooj yim ua rau gypsum dehydration nyuaj; yog tias qhov ceev slurry loj dhau, nws txhais tau tias CaSO4 cov ntsiab lus hauv cov slurry siab. CaSO4 siab dua yuav cuam tshuam kev yaj ntawm CaCO3 thiab tiv thaiv kev nqus ntawm SO2. CaCO3 nkag mus rau hauv lub tshuab nqus tsev dehydration nrog gypsum slurry thiab tseem cuam tshuam rau qhov cuam tshuam ntawm dehydration ntawm gypsum. Yuav kom muab kev ua si tag nrho rau qhov zoo ntawm ob-tower ob-circulation system ntawm ntub flue roj desulfurization, tus nqi pH ntawm thawj-theem pej thuam yuav tsum tau tswj hwm hauv qhov ntau ntawm 5.0 ± 0.2, thiab slurry density yuav tsum tau tswj hwm hauv qhov ntau ntawm 1100 ± 20kg / m3. Hauv kev ua haujlwm tiag tiag, qhov ceev ntawm cov slurry ntawm thawj theem pej thuam ntawm cov nroj tsuag yog li 1200kg / m3, thiab txawm tias ncav cuag 1300kg / m3 thaum lub sijhawm siab, uas ib txwm tswj hwm ntawm qib siab.

2. Qib ntawm kev yuam oxidation ntawm slurry

Kev yuam kom oxidation ntawm slurry yog kom muab cua txaus rau hauv slurry kom ua rau oxidation ntawm calcium sulfite rau calcium sulfate reaction feem ntau ua tiav, thiab tus nqi oxidation siab dua 95%, kom ntseeg tau tias muaj ntau yam gypsum txaus hauv slurry rau kev loj hlob ntawm crystal. Yog tias oxidation tsis txaus, cov crystals sib xyaw ntawm calcium sulfite thiab calcium sulfate yuav tsim tawm, ua rau muaj scaling. Qib ntawm kev yuam kom oxidation ntawm slurry nyob ntawm cov yam xws li qhov ntau ntawm cov cua oxidation, lub sijhawm nyob ntawm slurry, thiab cov nyhuv ntawm slurry. Cov cua oxidation tsis txaus, lub sijhawm nyob luv luv ntawm slurry, kev faib tsis sib xws ntawm slurry, thiab cov nyhuv tsis zoo yuav ua rau cov ntsiab lus CaSO3 · 1/2H2O hauv lub pej thuam siab dhau. Nws tuaj yeem pom tias vim tsis txaus oxidation hauv zos, cov ntsiab lus CaSO3 · 1/2H2O hauv slurry siab dua, ua rau muaj teeb meem hauv gypsum dehydration thiab cov ntsiab lus dej ntau dua.

3. Cov khoom tsis huv hauv cov slurry Cov khoom tsis huv hauv cov slurry feem ntau yog los ntawm cov pa roj flue thiab limestone. Cov khoom tsis huv no tsim cov ions tsis huv hauv cov slurry, cuam tshuam rau cov qauv lattice ntawm gypsum. Cov hlau hnyav uas yaj tas li hauv cov pa luam yeeb yuav tiv thaiv cov tshuaj tiv thaiv ntawm Ca2 + thiab HSO3-. Thaum cov ntsiab lus ntawm F- thiab Al3 + hauv slurry siab, fluorine-aluminium complex AlFn yuav tsim, npog qhov chaw ntawm cov limestone me me, ua rau muaj kev lom slurry, txo cov txiaj ntsig desulfurization, thiab cov limestone me me sib xyaw rau hauv cov gypsum crystals tsis tau ua tiav, ua rau nws nyuaj rau dehydrate gypsum. Cl- hauv slurry feem ntau yog los ntawm HCl hauv cov roj flue thiab cov dej ua haujlwm. Cov ntsiab lus Cl- hauv cov dej ua haujlwm yog me me, yog li Cl- hauv slurry feem ntau yog los ntawm cov roj flue. Thaum muaj ntau ntawm Cl- hauv slurry, Cl- yuav raug qhwv los ntawm cov siv lead ua thiab ua ke nrog qee qhov ntawm Ca2 + hauv slurry los tsim CaCl2 ruaj khov, tawm hauv qee qhov dej hauv cov siv lead ua. Tib lub sijhawm, qee qhov CaCl2 hauv cov slurry yuav nyob nruab nrab ntawm cov gypsum crystals, thaiv cov channel ntawm cov dej dawb ntawm cov crystals, ua rau cov dej ntawm gypsum nce ntxiv.

3. Kev cuam tshuam ntawm cov xwm txheej ua haujlwm ntawm cov khoom siv

1. Lub tshuab ua kom cov gypsum qhuav Cov gypsum slurry raug pumped mus rau lub gypsum cyclone rau kev qhuav thawj zaug los ntawm lub twj tso tawm gypsum. Thaum cov slurry ntws hauv qab raug sib sau ua ke rau cov khoom khov txog li 50%, nws ntws mus rau lub tshuab nqus tsev kom qhuav zaum ob. Cov yam tseem ceeb uas cuam tshuam rau qhov cuam tshuam ntawm kev sib cais ntawm gypsum cyclone yog lub siab ntawm cyclone thiab qhov loj ntawm lub nozzle xuab zeb. Yog tias lub siab ntawm cyclone qis dhau, qhov cuam tshuam ntawm kev sib cais cov khoom khov thiab kua yuav tsis zoo, cov slurry ntws hauv qab yuav muaj cov khoom khov tsawg dua, uas yuav cuam tshuam rau qhov cuam tshuam ntawm kev qhuav ntawm gypsum thiab ua rau cov dej ntau ntxiv; yog tias lub siab ntawm cyclone siab dhau, qhov cuam tshuam ntawm kev sib cais yuav zoo dua, tab sis nws yuav cuam tshuam rau qhov ua tau zoo ntawm kev faib tawm ntawm cyclone thiab ua rau cov khoom siv puas tsuaj loj heev. Yog tias qhov loj ntawm lub nozzle xuab zeb loj dhau, nws tseem yuav ua rau cov slurry ntws hauv qab muaj cov khoom khov tsawg dua thiab cov khoom me me, uas yuav cuam tshuam rau qhov cuam tshuam ntawm kev qhuav ntawm lub tshuab nqus tsev.

Qhov chaw nqus tsev siab dhau los yog qis dhau yuav cuam tshuam rau qhov ua rau gypsum dehydration effect. Yog tias qhov chaw nqus tsev qis dhau, lub peev xwm los rho cov dej noo ntawm gypsum yuav txo qis, thiab qhov ua rau gypsum dehydration effect yuav phem dua; yog tias qhov chaw nqus tsev siab dhau, qhov sib txawv ntawm daim ntaub lim yuav raug thaiv lossis txoj siv yuav ntxeev, uas kuj yuav ua rau qhov ua rau gypsum dehydration effect phem dua. Nyob rau hauv tib qho xwm txheej ua haujlwm, qhov zoo dua qhov permeability ntawm daim ntaub lim, qhov zoo dua qhov gypsum dehydration effect; yog tias qhov permeability ntawm daim ntaub lim tsis zoo thiab cov channel lim raug thaiv, qhov ua rau gypsum dehydration effect yuav phem dua. Lub thickness ntawm lub ncuav mog qab zib lim kuj muaj qhov cuam tshuam loj rau gypsum dehydration. Thaum lub tshuab siv txoj siv txo qis, lub thickness ntawm lub ncuav mog qab zib lim nce, thiab lub twj tso kua mis lub peev xwm los rho tawm txheej sab saud ntawm lub ncuav mog qab zib lim tsis muaj zog, ua rau cov dej noo ntawm gypsum nce ntxiv; thaum qhov ceev ntawm txoj siv conveyor nce ntxiv, lub thickness ntawm lub ncuav mog qab zib lim txo qis, uas yooj yim ua rau cov dej hauv zos ntawm lub ncuav mog qab zib lim, rhuav tshem lub tshuab nqus tsev, thiab tseem ua rau cov dej noo ntawm gypsum nce ntxiv.

2. Kev ua haujlwm tsis zoo ntawm lub tshuab kho dej khib nyiab desulfurization lossis cov dej khib nyiab me me yuav cuam tshuam rau qhov kev tso tawm ntawm cov dej khib nyiab desulfurization. Thaum ua haujlwm ntev, cov khoom tsis huv xws li pa luam yeeb thiab hmoov av yuav txuas ntxiv mus rau hauv cov slurry, thiab cov hlau hnyav, Cl-, F-, Al-, thiab lwm yam hauv cov slurry yuav txuas ntxiv nplua nuj, ua rau qhov zoo ntawm cov slurry tsis tu ncua, cuam tshuam rau kev nce qib ntawm cov tshuaj tiv thaiv desulfurization, gypsum tsim thiab dehydration. Siv Cl- hauv slurry ua piv txwv, cov ntsiab lus Cl- hauv cov slurry ntawm thawj theem nqus tsev ntawm lub zog fais fab yog siab txog 22000mg / L, thiab cov ntsiab lus Cl- hauv gypsum ncav cuag 0.37%. Thaum cov ntsiab lus Cl- hauv cov slurry yog li 4300mg / L, qhov cuam tshuam ntawm dehydration ntawm gypsum zoo dua. Raws li cov ntsiab lus chloride ion nce ntxiv, qhov cuam tshuam ntawm dehydration ntawm gypsum maj mam poob qis.