Hauv lub tshuab limestone-gypsum ntub flue gas desulfurization, kev tswj xyuas qhov zoo ntawm cov slurry yog qhov tseem ceeb rau kev ua haujlwm zoo thiab ruaj khov ntawm tag nrho lub cev. Nws cuam tshuam ncaj qha rau lub neej ntawm cov khoom siv, kev ua haujlwm desulfurization, thiab qhov zoo ntawm cov khoom seem. Ntau lub chaw tsim hluav taws xob tsis quav ntsej txog qhov cuam tshuam ntawm chloride ions hauv cov slurry ntawm FGD system. Hauv qab no yog qhov txaus ntshai ntawm ntau dhau chloride ions, lawv cov peev txheej, thiab cov kev ntsuas txhim kho pom zoo.
I. Kev Phom Sij ntawm Cov Chloride Ions Ntau Dhau
1. Kev xeb sai ntawm cov khoom hlau hauv lub absorber
- Cov chloride ions ua rau cov hlau tsis xeb, ua rau cov txheej passivation tawg.
- Cov Cl⁻ uas muaj ntau dhau ua rau cov pH ntawm cov slurry qis dua, ua rau cov hlau xeb dav dav, xeb qhov tawg, thiab xeb kev ntxhov siab. Qhov no ua rau cov khoom siv xws li cov twj tso kua dej thiab cov agitators puas tsuaj, ua rau lawv lub neej luv dua.
- Thaum lub sijhawm tsim cov khoom nqus dej, qhov kev tso cai ntawm Cl⁻ concentration yog qhov tseem ceeb uas yuav tsum xav txog. Kev kam rau chloride ntau dua yuav tsum muaj cov khoom zoo dua, ua rau cov nqi nce ntxiv. Feem ntau, cov khoom siv xws li 2205 stainless hlau tuaj yeem tswj tau Cl⁻ concentration txog li 20,000 mg / L. Rau cov concentration siab dua, cov khoom siv ruaj khov dua xws li Hastelloy lossis nickel-based alloys raug pom zoo.
2. Txo Kev Siv Slurry thiab Kev Siv Reagent/Zog Ntau Ntxiv
- Cov tshuaj chlorides feem ntau muaj nyob ua calcium chloride hauv cov slurry. Cov calcium ion concentration siab, vim yog cov nyhuv ion feem ntau, tiv thaiv limestone yaj, txo cov alkalinity thiab cuam tshuam rau SO₂ tshem tawm cov tshuaj tiv thaiv.
- Cov chloride ions kuj tseem cuam tshuam rau kev nqus ntawm SO₂ lub cev thiab tshuaj lom neeg, txo qhov ua tau zoo ntawm desulfurization.
- Cl⁻ ntau dhau tuaj yeem ua rau muaj npuas hauv lub nqus pa, ua rau muaj dej ntws ntau dhau, nyeem cov kua dej tsis raug, thiab cavitation ntawm lub twj tso kua mis. Qhov no tuaj yeem ua rau cov kua dej nkag mus rau hauv cov kav dej roj flue.
- Cov tshuaj chloride ntau kuj tseem tuaj yeem ua rau muaj kev sib xyaw ua ke nrog cov hlau xws li Al, Fe, thiab Zn, txo cov tshuaj tiv thaiv ntawm CaCO₃ thiab thaum kawg txo qis kev siv cov slurry.
3. Kev puas tsuaj ntawm Gypsum Zoo
- Cov Cl⁻ concentration siab hauv cov slurry inhibit SO₂ yaj, ua rau muaj CaCO₃ cov ntsiab lus siab dua hauv gypsum thiab cov khoom dewatering tsis zoo.
- Yuav kom tsim tau cov gypsum zoo, yuav tsum muaj dej ntxuav ntxiv, ua rau muaj kev voj voog tsis zoo thiab ua rau cov chloride ntau ntxiv hauv cov dej khib nyiab, ua rau nws txoj kev kho mob nyuaj.
II. Cov Khoom Siv Chloride Ions Hauv Cov Khoom Siv Absorber Slurry
1. Cov Tshuaj Reagents FGD, Dej Pleev Xim, thiab Thee
- Cov chlorides nkag mus rau hauv lub cev los ntawm cov inputs no.
2. Siv Cooling Tower Blowdown ua Dej Ua Haujlwm
- Cov dej uas tawm hauv qhov cua feem ntau muaj li ntawm 550 mg/L ntawm Cl⁻, uas ua rau muaj Cl⁻ slurry sib sau ua ke.
3. Kev Ua Haujlwm Tsis Zoo ntawm Electrostatic Precipitator
- Cov hmoov av uas nkag mus rau hauv lub tshuab nqus dej nqa cov chlorides, uas yaj hauv cov slurry thiab sib sau ua ke.
4. Kev Tso Dej Pov Tseg Tsis Txaus
- Yog tsis tso cov dej khib nyiab desulfurization raws li kev tsim thiab kev ua haujlwm yuav tsum ua rau muaj Cl⁻ sib sau ua ke.
III. Kev Ntsuas Los Tswj Chloride Ions Hauv Absorber Slurry
Txoj kev zoo tshaj plaws los tswj cov Cl⁻ ntau dhau yog kom nce qhov kev tso tawm ntawm cov dej khib nyiab desulfurization thaum ua kom ntseeg tau tias ua raws li cov qauv kev tso tawm. Lwm cov kev ntsuas pom zoo suav nrog:
1. Siv Dej Lim Zoo Dua
- Ua kom lub sijhawm lim dej rov qab los luv dua thiab tswj cov dej txias lossis dej nag nkag mus rau hauv lub kaw lus slurry kom tswj tau qhov sib npaug ntawm dej.
2. Txo cov dej ntxuav Gypsum
- Txwv cov ntsiab lus ntawm gypsum Cl⁻ kom tsawg. Ua kom Cl⁻ raug tshem tawm ntau dua thaum lub sijhawm dewatering los ntawm kev hloov cov slurry nrog cov gypsum slurry tshiab thaum Cl⁻ qib tshaj 10,000 mg / L. Saib xyuas cov slurry Cl⁻ qib nrog ib qhoinline density meterthiab kho cov nqi dej khib nyiab kom haum.
3. Txhawb kom muaj kev soj ntsuam Chloride ntxiv
- Sim cov tshuaj chloride uas muaj nyob hauv cov slurry tas li thiab kho cov haujlwm raws li cov theem sulfur ntawm cov thee thee, kev sib xws ntawm cov khoom siv, thiab cov kev xav tau ntawm lub kaw lus.
4. Tswj Cov Qhov Ceev ntawm Slurry thiab pH
- Tswj qhov ceev ntawm cov slurry ntawm 1080–1150 kg/m³ thiab pH ntawm 5.4–5.8. Txo pH kom tsawg dua ib ntus kom txhim kho cov tshuaj tiv thaiv hauv cov absorber.
5. Xyuas kom meej tias cov Electrostatic Precipitators ua haujlwm zoo
- Tiv thaiv kom cov hmoov av uas muaj cov tshuaj chloride ntau tsis txhob nkag mus rau hauv lub tshuab nqus, uas yuav yaj thiab sib sau ua ke hauv cov slurry.
Xaus lus
Cov chloride ions ntau dhau qhia tias cov dej khib nyiab tsis txaus, ua rau kev ua haujlwm desulfurization txo qis thiab kev tsis sib npaug ntawm lub kaw lus. Kev tswj hwm chloride zoo tuaj yeem txhim kho kev ruaj khov thiab kev ua haujlwm ntawm lub kaw lus. Yog xav tau cov kev daws teeb meem tshwj xeeb lossis simLonnmetercov khoom lag luam nrog kev txhawb nqa debugging kev debugging, tiv tauj peb kom tau txais kev sab laj dawb ntawm cov kev daws teeb meem ntsuas slurry density.
Lub sijhawm tshaj tawm: Lub Ib Hlis-21-2025
