Nyob rau hauv lub limestone-gypsum ntub flue roj desulfurization system, kev tswj xyuas qhov zoo ntawm slurry yog qhov tseem ceeb rau kev nyab xeeb thiab ruaj khov ntawm tag nrho cov system. Nws cuam tshuam ncaj qha rau cov khoom siv lifespan, desulfurization efficiency, thiab los ntawm cov khoom zoo. Ntau lub tuam txhab hluav taws xob tau kwv yees cov txiaj ntsig ntawm chloride ions hauv slurry ntawm FGD system. Hauv qab no yog cov kev phom sij ntawm cov tshuaj chloride ions ntau dhau, lawv cov peev txheej, thiab kev ntsuas kev txhim kho tau pom zoo.
I. Kev phom sij ntawm cov tshuaj chloride ntau dhau
1. Accelerated Corrosion ntawm hlau Cheebtsam nyob rau hauv lub Absorber
- Chloride ions corrode stainless hlau, rhuav tshem cov txheej txheem passivation.
- Cov ntsiab lus siab ntawm Cl⁻ txo qis pH ntawm slurry, ua rau cov hlau corrosion, crevice corrosion, thiab kev nyuaj siab corrosion. Qhov no ua rau cov khoom puas xws li slurry twj thiab agitators, ua rau lawv lub neej luv luv.
- Thaum lub sij hawm tsim absorber, qhov tso cai Cl⁻ concentration yog qhov tseem ceeb rau kev txiav txim siab. Cov tshuaj chloride siab dua yuav tsum muaj cov ntaub ntawv zoo dua, nce nqi. Feem ntau, cov ntaub ntawv zoo li 2205 stainless hlau tuaj yeem tswj Cl⁻ concentrations txog 20,000 mg / L. Rau siab dua, cov ntaub ntawv muaj zog dua li Hastelloy lossis npib tsib xee-raws li alloys raug pom zoo.
2. Txo kev siv slurry thiab nce reagent / zog noj
- Chlorides feem ntau muaj nyob hauv calcium chloride hauv slurry. High calcium ion concentration, vim muaj cov nyhuv ion ntau, inhibits limestone dissolution, txo alkalinity thiab cuam tshuam rau SO₂ tshem tawm cov tshuaj tiv thaiv.
- Chloride ions kuj cuam tshuam lub cev thiab tshuaj lom neeg nqus ntawm SO₂, txo cov kev ua haujlwm ntawm desulfurization.
- Tshaj Cl⁻ tuaj yeem ua rau npuas tsim hauv lub absorber, ua rau cov dej ntws tawm, cov kua nyeem tsis raug, thiab cov twj tso kua mis cavitation. Qhov no tuaj yeem ua rau cov slurry nkag mus rau hauv cov pa roj flue.
- Cov tshuaj chloride siab kuj tseem tuaj yeem ua rau muaj kev cuam tshuam zoo nrog cov hlau xws li Al, Fe, thiab Zn, txo cov reactivity ntawm CaCO₃ thiab thaum kawg txo slurry siv efficiency.
3. Kev tsis zoo ntawm Gypsum Zoo
- Ua kom siab Cl⁻ concentrations hauv slurry inhibit SO₂ dissolution, ua rau siab dua CaCO₃ cov ntsiab lus hauv gypsum thiab cov khoom tsis zoo dewatering.
- Txhawm rau tsim cov gypsum zoo, yuav tsum tau ntxuav cov dej ntxiv, tsim kom muaj lub voj voog tsis zoo thiab ua kom cov chloride concentration hauv cov dej khib nyiab, ua rau nws nyuaj rau kev kho mob.
II. Qhov chaw ntawm chloride ions hauv Absorber Slurry
1. FGD Reagents, Makeup Water, thiab Coal
- Chlorides nkag mus rau hauv lub cev los ntawm cov khoom siv no.
2. Siv Cov Cuab Yeej Cuab Yeej Cuab Yeej Cuab Yeej ua cov txheej txheem dej
- Lub tshuab nqus dej feem ntau muaj nyob ib ncig ntawm 550 mg / L ntawm Cl⁻, ua rau cov slurry Cl⁻ tsub zuj zuj.
3. Tsis zoo Electrostatic Precipitator Performance
- Cov hmoov av ntau ntxiv nkag mus rau hauv lub absorber nqa chlorides, uas yaj hauv slurry thiab accumulates.
4. Cov dej khib nyiab tsis txaus
- Kev ua tsis tiav ntawm cov dej khib nyiab desulfurization ib qho kev tsim thiab kev ua haujlwm yuav ua rau Cl⁻ tsub zuj zuj.
III. Kev ntsuas los tswj cov chloride ions hauv Absorber Slurry
Txoj hauv kev zoo tshaj plaws los tswj cov Cl⁻ ntau dhau yog txhawm rau txhawm rau txhawm rau txhawm rau desulfurization cov dej khib nyiab thaum ua kom muaj kev ua raws li cov qauv tso tawm. Lwm cov kev ntsuas pom zoo suav nrog:
1. Kev siv dej lim dej kom zoo
- Txo lub sij hawm lim dej rov qab thiab tswj cov dej txias los yog dej nag los rau hauv cov slurry system kom tswj cov dej sib npaug.
2. Txo Gypsum Ntxuav Dej
- Txwv gypsum Cl⁻ cov ntsiab lus rau ntau yam tsim nyog. Ua kom tshem tawm Cl⁻ thaum lub sij hawm dewatering los ntawm kev hloov slurry nrog tshiab gypsum slurry thaum Cl⁻ qib siab tshaj 10,000 mg / L. Saib xyuas slurry Cl⁻ qib nrog ibinline ceev meterthiab kho cov dej khib nyiab pov tseg raws li.
3. Txhim kho cov tshuaj chloride soj ntsuam
- Tsis tu ncua sim slurry chloride cov ntsiab lus thiab kho cov kev khiav hauj lwm raws li cov coal sulfur qib, cov ntaub ntawv compatibility, thiab system yuav tsum tau.
4. Tswj Slurry Ceev thiab pH
- Khaws cov slurry ntom ntawm 1080-1150 kg / m³ thiab pH ntawm 5.4-5.8. Ib ntus txo qis pH los txhim kho cov tshuaj tiv thaiv hauv lub absorber.
5. Ua kom muaj kev ua haujlwm zoo ntawm Electrostatic Precipitators
- Tiv thaiv cov plua plav uas nqa cov tshuaj chloride siab los ntawm kev nkag mus rau hauv absorber, uas yuav txwv tsis pub yaj thiab khaws cia hauv slurry.
Xaus
Tshaj chloride ions qhia tias cov dej khib nyiab tsis txaus, ua rau txo qis desulfurization efficiency thiab qhov system imbalances. Kev tswj cov tshuaj chloride zoo tuaj yeem txhim kho kev ruaj ntseg thiab ua haujlwm tau zoo. Rau kev daws teeb meem los yog simLonnmeter's khoom nrog kev pab cuam debugging kev pab cuam, tiv tauj peb rau kev sib tham dawb ntawm slurry density ntsuas kev daws teeb meem.
Post lub sij hawm: Jan-21-2025
