Kev tshuaj xyuas ntawm cov laj thawj rau gypsum lub cev qhuav dej nyuaj
1 Boiler roj noj thiab ruaj khov combustion
Cov hluav taws xob hluav taws xob hluav taws xob tsim hluav taws xob yuav tsum tau siv cov roj ntau ntau los pab kev sib tsoo thaum pib, kaw, tsis tshua muaj hluav taws xob combustion thiab kev sib sib zog nqus ncov vim kev tsim thiab thee hlawv. Vim kev ua haujlwm tsis ruaj khov thiab tsis txaus boiler combustion, ntau npaum li cas ntawm unburned roj los yog sib tov ntawm roj hmoov yuav nkag mus rau lub absorber slurry nrog cov flue gas. Nyob rau hauv qhov muaj zog cuam tshuam nyob rau hauv lub absorber, nws yog ib qho yooj yim heev los tsim ua npuas ncauj zoo thiab sib sau ua ke ntawm cov slurry nto. Qhov no yog qhov muaj pes tsawg leeg tsom xam ntawm cov npuas dej ntawm qhov chaw absorber slurry ntawm lub zog cog.
Thaum cov roj sib sau ua ke ntawm cov slurry, ib feem ntawm nws yog sai sai dispersed nyob rau hauv lub absorber slurry nyob rau hauv kev sib cuam tshuam ntawm nplawm thiab txau, thiab ib tug nyias roj zaj duab xis yog tsim nyob rau saum npoo ntawm limestone, calcium sulfite thiab lwm yam hais nyob rau hauv lub slurry, uas qhwv lub limestone thiab lwm yam hais, hindering lub dissolution ntawm sulfite, limestone thiab calcium sulfite. desulfurization efficiency thiab tsim ntawm gypsum. Cov roj uas muaj cov khoom nqus dej slurry nkag mus rau hauv gypsum lub cev qhuav dej los ntawm lub twj tso kua mis gypsum. Vim muaj cov roj thiab tsis tiav oxidized sulfurous acid cov khoom, nws yog ib qho yooj yim ua rau lub tshuab nqus tsev siv conveyor lim ntaub sib txawv yuav tsum tau thaiv, uas ua rau muaj teeb meem nyob rau hauv gypsum lub cev qhuav dej.
2.Haus luam yeeb Concentration ntawm Inlet
Cov ntub dej desulfurization nqus ntauwd muaj qee yam kev tshem tawm plua plav tawm, thiab nws cov plua plav tshem tawm tuaj yeem ncav cuag li 70%. Lub tshuab fais fab yog tsim los kom muaj plua plav concentration ntawm 20mg / m3 ntawm lub qhov hluav taws xob plua plav (desulfurization inlet). Yuav kom txuag tau lub zog thiab txo cov nroj tsuag siv hluav taws xob, qhov tseeb plua plav concentration ntawm cov plua plav collector qhov hluav taws xob yog tswj ntawm li 30mg / m3. Cov plua plav ntau dhau nkag mus rau ntauwd nqus thiab raug tshem tawm los ntawm kev tshem tawm cov plua plav synergistic ntawm desulfurization system. Feem ntau ntawm cov plua plav uas nkag mus rau hauv lub nqus ntauwd tom qab electrostatic plua plav purification yog tsawg dua 10μm, lossis txawm tias tsawg dua 2.5μm, uas yog me dua li qhov me me ntawm gypsum slurry. Tom qab cov plua plav nkag mus rau hauv lub tshuab nqus tsev siv conveyor nrog gypsum slurry, nws tseem thaiv cov ntaub lim dej, ua rau huab cua tsis zoo ntawm cov ntaub lim dej thiab nyuaj rau gypsum lub cev qhuav dej.
2. Kev cuam tshuam ntawm gypsum slurry zoo
1 Slurry ceev
Qhov loj ntawm slurry ceev qhia qhov ceev ntawm slurry nyob rau hauv lub absorption ntauwd. Yog tias qhov ntom ntom me dhau, nws txhais tau hais tias CaSO4 cov ntsiab lus hauv slurry tsawg thiab CaCO3 cov ntsiab lus siab, uas ncaj qha ua rau cov CaCO3 pov tseg. Nyob rau tib lub sijhawm, vim muaj cov CaCO3 me me, nws yooj yim ua rau gypsum lub cev qhuav dej nyuaj; Yog hais tias cov slurry ceev yog loj heev, nws txhais tau hais tias CaSO4 cov ntsiab lus nyob rau hauv slurry yog siab. CaSO4 siab dua yuav cuam tshuam qhov kev sib cais ntawm CaCO3 thiab inhibit qhov nqus ntawm SO2. CaCO3 nkag mus rau hauv lub tshuab nqus dej nrog cov gypsum slurry thiab tseem cuam tshuam rau lub cev qhuav dej ntawm gypsum. Txhawm rau muab kev ua si tag nrho rau qhov zoo ntawm ob-ntauwd ob-kab kev ua haujlwm ntawm cov roj ntub dej desulfurization, tus nqi pH ntawm thawj-theem pej thuam yuav tsum tau tswj nyob rau hauv thaj tsam ntawm 5.0 ± 0.2, thiab slurry ntom yuav tsum tau tswj nyob rau hauv thaj tsam ntawm 1100 ± 20kg / m3. Hauv kev ua haujlwm tiag tiag, slurry ceev ntawm thawj-theem ntauwd ntawm cov nroj tsuag yog hais txog 1200kg / m3, thiab txawm tias nce mus txog 1300kg / m3 ntawm lub sijhawm siab, uas yog ib txwm tswj ntawm qib siab.
2. Degree ntawm yuam oxidation ntawm slurry
Kev quab yuam oxidation ntawm slurry yog ua kom cov cua txaus rau hauv slurry kom oxidation ntawm calcium sulfite rau calcium sulfate cov tshuaj tiv thaiv zoo li ua tiav, thiab oxidation tus nqi siab tshaj 95%, xyuas kom meej tias muaj ntau yam gypsum txaus nyob rau hauv slurry rau siv lead ua kev loj hlob. Yog tias cov oxidation tsis txaus, cov khoom sib xyaw ntawm calcium sulfite thiab calcium sulfate yuav raug tsim, ua rau scaling. Qhov degree ntawm kev quab yuam oxidation ntawm slurry nyob ntawm cov yam ntxwv xws li tus nqi ntawm oxidation cua, lub sij hawm nyob ntawm slurry, thiab cov nyhuv stirring ntawm slurry. Cov huab cua oxidation tsis txaus, lub sijhawm nyob luv luv ntawm slurry, tsis sib npaug ntawm cov slurry, thiab cov nyhuv stirring tsis zoo yuav ua rau CaSO3·1/2H2O cov ntsiab lus hauv cov pej thuam siab dhau. Nws tuaj yeem pom tau tias vim tsis muaj oxidation hauv zos tsis txaus, CaSO3·1/2H2O cov ntsiab lus hauv slurry yog siab dua, ua rau muaj teeb meem hauv gypsum lub cev qhuav dej thiab cov ntsiab lus dej ntau dua.
3. Cov ntsiab lus impurity hauv slurry Impurities nyob rau hauv slurry mas yog los ntawm flue roj thiab limestone. Cov impurities no tsim impurity ions nyob rau hauv slurry, cuam tshuam rau lub lattice qauv ntawm gypsum. Cov hlau hnyav tsis tu ncua hauv cov pa luam yeeb yuav cuam tshuam cov tshuaj tiv thaiv ntawm Ca2+ thiab HSO3-. Thaum cov ntsiab lus ntawm F- thiab Al3+ nyob rau hauv slurry yog siab, fluorine-aluminium complex AlFn yuav raug generated, npog lub nto ntawm limestone hais, ua rau slurry lom, txo desulfurization efficiency, thiab nplua limestone hais yog tov nyob rau hauv incompletely reacted gypsum crystals, ua rau nws nyuaj rau dehydrate gypsum. Cl- hauv slurry feem ntau yog los ntawm HCl hauv cov pa roj thiab cov txheej txheem dej. Cov ntsiab lus Cl- hauv cov txheej txheem dej yog me me, yog li Cl- hauv slurry feem ntau yog los ntawm cov pa roj. Thaum muaj ntau npaum li cas ntawm Cl- hauv slurry, Cl- yuav muab qhwv los ntawm cov muaju thiab ua ke nrog ib qho nyiaj ntawm Ca2+ hauv slurry los tsim CaCl2 ruaj khov, tawm hauv cov dej muaju. Nyob rau tib lub sijhawm, qee qhov nyiaj ntawm CaCl2 hauv slurry yuav nyob nruab nrab ntawm gypsum crystals, thaiv cov channel ntawm cov dej dawb ntawm cov muaju, ua rau cov dej ntsiab lus ntawm gypsum nce.
3. Kev cuam tshuam ntawm cov khoom siv ua haujlwm raws li txoj cai
1. Gypsum dehydration system Gypsum slurry yog pumped rau gypsum cyclone rau thawj lub cev qhuav dej los ntawm lub twj tso kua mis gypsum. Thaum cov dej ntws hauv qab slurry yog concentrated rau cov ntsiab lus ntawm li 50%, nws ntws mus rau lub tshuab nqus tsev conveyor rau lub cev qhuav dej. Lub ntsiab yam tseem ceeb cuam tshuam rau kev sib cais ntawm cov gypsum cyclone yog cov cua daj cua dub inlet siab thiab qhov loj ntawm cov xuab zeb nozzle. Yog hais tias lub cua daj cua dub inlet siab tsawg dhau, cov khoom sib cais ntawm cov kua dej yuav tsis zoo, cov dej hauv qab slurry yuav muaj cov ntsiab lus tsawg dua, uas yuav cuam tshuam rau lub cev qhuav dej ntawm cov gypsum thiab nce cov ntsiab lus dej; Yog hais tias lub cua daj cua dub inlet siab siab dhau lawm, qhov kev sib cais yuav zoo dua, tab sis nws yuav cuam tshuam rau kev faib tawm ntawm cov cua daj cua dub thiab ua rau hnyav hnyav ntawm cov khoom siv. Yog hais tias qhov loj ntawm cov xuab zeb nozzle loj dhau lawm, nws tseem yuav ua rau cov dej hauv qab slurry kom muaj cov ntsiab lus tsawg dua thiab cov khoom me me, uas yuav cuam tshuam rau lub cev qhuav dej ntawm lub tshuab nqus tsev conveyor.
Lub tshuab nqus tsev siab dhau lossis qis dhau yuav cuam tshuam rau gypsum lub cev qhuav dej. Yog tias lub tshuab nqus tsev qis dhau lawm, lub peev xwm tshem tawm cov dej noo ntawm gypsum yuav raug txo, thiab cov nyhuv gypsum lub cev qhuav dej yuav tsis zoo; Yog tias lub tshuab nqus tsev siab dhau lawm, qhov khoob ntawm cov ntaub lim dej yuav raug thaiv los yog txoj siv tawv yuav deviate, uas tseem yuav ua rau cov gypsum lub cev qhuav dej tsis zoo. Nyob rau hauv tib txoj kev ua haujlwm, qhov zoo dua ntawm huab cua permeability ntawm cov ntaub lim dej, qhov zoo dua cov gypsum lub cev qhuav dej; Yog tias huab cua permeability ntawm cov ntaub lim dej tsis zoo thiab cov lim dej raug thaiv, cov nyhuv gypsum lub cev qhuav dej yuav tsis zoo. Lub lim ncuav mog qab zib tuab kuj muaj qhov cuam tshuam tseem ceeb ntawm gypsum lub cev qhuav dej. Thaum txoj siv conveyor ceev txo qis, lim ncuav mog qab zib thickness nce, thiab lub tshuab nqus tsev twj tso kua mis lub peev xwm los extract lub sab sauv txheej ntawm lub ncuav mog qab zib lim yog tsis muaj zog, uas ua rau ib tug nce nyob rau hauv lub gypsum noo noo cov ntsiab lus; Thaum txoj siv conveyor ceev nce, lub lim ncuav mog qab zib thickness txo, uas yog ib qho yooj yim ua rau lub zos lim ncuav mog qab zib to, rhuav tshem lub nqus tsev vacuum, thiab kuj ua rau ib tug nce nyob rau hauv lub gypsum noo noo cov ntsiab lus.
2. Kev ua haujlwm txawv txav ntawm desulfurization wastewater kho qhov system lossis cov dej khib nyiab me me yuav cuam tshuam rau cov dej khib nyiab desulfurization. Nyob rau hauv lub sijhawm ua haujlwm ntev, impurities xws li cov pa luam yeeb thiab plua plav yuav nkag mus rau hauv slurry, thiab cov hlau hnyav, Cl-, F-, Al-, thiab lwm yam hauv slurry yuav ua rau muaj kev nplua nuj, ua rau muaj qhov tsis zoo ntawm slurry zoo, cuam tshuam rau kev ua haujlwm ntawm cov tshuaj tiv thaiv desulfurization, gypsum tsim thiab lub cev qhuav dej. Siv Cl- hauv slurry ua piv txwv, Cl- cov ntsiab lus nyob rau hauv slurry ntawm thawj-theem nqus ntauwd ntawm lub zog cog yog siab li 22000mg / L, thiab cov ntsiab lus Cl- hauv gypsum nce mus txog 0.37%. Thaum Cl- cov ntsiab lus hauv slurry yog li 4300mg / L, lub cev qhuav dej ntawm gypsum zoo dua. Raws li cov ntsiab lus chloride ion nce, lub cev qhuav dej ntawm gypsum maj mam deteriorates.
Tswj ntsuas
1. Txhim kho qhov kev hloov pauv ntawm boiler kev ua haujlwm, txo qhov cuam tshuam ntawm cov roj txhaj tshuaj thiab ruaj khov combustion ntawm lub desulfurization system thaum lub sij hawm pib thiab kaw lub boiler los yog tsawg-load ua hauj lwm, tswj tus naj npawb ntawm slurry ncig twj tso rau hauv lub lag luam, thiab txo cov pa phem ntawm unburned roj hmoov sib tov rau slurry.
2. Xav txog kev ua haujlwm ruaj khov nyob rau lub sijhawm ntev thiab kev lag luam tag nrho ntawm desulfurization system, ntxiv dag zog rau kev hloov kho ntawm cov khoom siv plua plav, txais kev ua haujlwm siab, thiab tswj cov plua plav concentration ntawm cov plua plav collector qhov hluav taws xob (desulfurization inlet) nyob rau hauv tus nqi tsim.
3. Kev saib xyuas lub sijhawm ntawm slurry ntom ntom (slurry ceev meter), oxidation cua ntim, nqus ntauwd kua theem (radar theem meter), slurry stirring ntaus ntawv, thiab lwm yam kom paub meej tias cov tshuaj tiv thaiv desulfurization yog nqa tawm raws li ib txwm muaj.
4. Txhim khu kev txij nkawm thiab kev hloov kho ntawm gypsum cyclone thiab lub tshuab nqus tsev siv conveyor, tswj lub inlet siab ntawm gypsum cyclone thiab lub tshuab nqus tsev kawm ntawv ntawm txoj siv conveyor nyob rau hauv ib tug tsim nyog ntau yam, thiab tsis tu ncua xyuas lub cyclone, xuab zeb settling nozzle thiab lim ntaub los xyuas kom meej tias cov khoom ua hauj lwm nyob rau hauv qhov zoo tshaj plaws.
5. Ua kom lub cev ua haujlwm ntawm cov dej khib nyiab desulfurization, tsis tu ncua tso cov dej khib nyiab desulfurization, thiab txo cov ntsiab lus impurity hauv cov khoom siv ntauwd slurry.
Xaus
Qhov nyuaj ntawm gypsum lub cev qhuav dej yog ib qho teeb meem tshwm sim hauv cov khoom siv ntub dej desulfurization. Muaj ntau yam cuam tshuam, uas yuav tsum muaj kev tsom xam thiab kev hloov kho los ntawm ntau yam xws li xov xwm sab nraud, cov tshuaj tiv thaiv thiab cov khoom siv ua haujlwm. Tsuas yog los ntawm kev nkag siab tob txog desulfurization cov tshuaj tiv thaiv mechanism thiab cov cuab yeej ua haujlwm cov yam ntxwv thiab rationally tswj cov haujlwm tseem ceeb ntawm lub cev tuaj yeem ua rau lub cev qhuav dej ntawm desulfurized gypsum tau lav.
Post lub sij hawm: Feb-06-2025
