Mu limestone-gypsum yonyowa gasi desulfurization dongosolo, kukhalabe khalidwe la slurry n'kofunika kuti otetezeka ndi khola ntchito dongosolo lonse. Zimakhudza kwambiri moyo wa zida, kugwiritsa ntchito bwino kwa desulfurization, komanso mtundu wazinthu. Zomera zambiri zamagetsi zimachepetsa mphamvu ya ayoni a chloride mu slurry pa dongosolo la FGD. Pansipa pali zoopsa za ayoni ochulukirapo a chloride, magwero awo, ndi njira zowongolera zomwe akulimbikitsidwa.
I. Zowopsa za Ma Ioni a Chloride Ochuluka
1. Kuthamanga Kwambiri kwa Zitsulo Zazitsulo mu Absorber
- Ma chloride ions amawononga chitsulo chosapanga dzimbiri, ndikuphwanya wosanjikiza wa passivation.
- Kuchuluka kwa Cl⁻ kumachepetsa pH ya slurry, zomwe zimapangitsa kuti chitsulo chizimbirire, chiwonongeko, komanso kupsinjika maganizo. Izi zimawononga zida monga mapampu a slurry ndi ma agitator, kufupikitsa moyo wawo.
- Pamapangidwe a absorber, kukhazikika kwa Cl⁻ kovomerezeka ndikofunikira kwambiri. Kulekerera kwapamwamba kwa kloridi kumafuna zipangizo zabwinoko, kuonjezera ndalama. Nthawi zambiri, zida ngati 2205 zitsulo zosapanga dzimbiri zimatha kuthana ndi Cl⁻ mpaka 20,000 mg/L. Pazinthu zambiri, zida zolimba kwambiri monga Hastelloy kapena ma alloys opangidwa ndi faifi akulimbikitsidwa.
2. Kuchepetsa Kugwiritsa Ntchito Slurry ndi Kuwonjezeka kwa Reagent / Kugwiritsa Ntchito Mphamvu
- Ma chloride nthawi zambiri amakhala ngati calcium chloride mu slurry. Kuphatikizika kwa ma ion a calcium, chifukwa cha zomwe zimachitika wamba, kumachepetsa kusungunuka kwa miyala yamchere, kutsitsa alkalinity komanso kukhudza momwe SO₂ imachotsa.
- Chloride ions imalepheretsanso kuyamwa kwakuthupi ndi mankhwala kwa SO₂, kumachepetsa mphamvu ya desulfurization.
- Kuchuluka kwa Cl⁻ kungayambitse kupangika kwa thovu mu chotengera, kumabweretsa kusefukira, kuwerengera kwamadzi abodza, ndi cavitation yapampu. Izi zitha kupangitsa kuti slurry alowe munjira ya gasi.
- Kuchuluka kwa chloride kungayambitsenso kusakanikirana kwamphamvu ndi zitsulo monga Al, Fe, ndi Zn, kuchepetsa kuyambiranso kwa CaCO₃ ndipo pamapeto pake kumachepetsa kugwiritsa ntchito slurry.
3. Kuwonongeka kwa Gypsum Quality
- Kukhazikika kwa Cl⁻ mu slurry kumalepheretsa kusungunuka kwa SO₂, zomwe zimapangitsa kuti CaCO₃ ikhale yochuluka mu gypsum ndi kuchepa kwa madzi.
- Kuti apange gypsum yapamwamba kwambiri, madzi ochapira owonjezera amafunikira, kupanga chizungulire choyipa ndikuwonjezera kuchuluka kwa chloride m'madzi onyansa, kusokoneza chithandizo chake.
II. Magwero a Chloride Ions mu Absorber Slurry
1. FGD Reagents, Madzi odzoladzola, ndi Malasha
- Ma chloride amalowa m'dongosolo kudzera pazolowetsa izi.
2. Kugwiritsa Ntchito Cooling Tower Blowdown ngati Njira ya Madzi
- Madzi otsekemera amakhala ndi pafupifupi 550 mg/L ya Cl⁻, zomwe zimapangitsa kuti Cl⁻ achuluke.
3. Osauka Electrostatic Precipitator Performance
- Kuchuluka fumbi particles kulowa absorber kunyamula mankhwala enaake, amene kupasuka mu slurry ndi kudziunjikira.
4. Kutaya Madzi Osakwanira
- Kulephera kutulutsa madzi owonongeka a desulfurization pamapangidwe ndi zofunikira zogwirira ntchito kumabweretsa Cl⁻ kudzikundikira.
III. Njira Zowongolera Ma Ioni a Chloride mu Absorber Slurry
Njira yothandiza kwambiri yothanirana ndi Cl⁻ yochulukirachulukira ndikuwonjezera kutulutsa kwamadzi onyansa a desulfurization ndikuwonetsetsa kuti akutsatira miyezo yotulutsa. Njira zina zovomerezeka ndi izi:
1. Konzani Kugwiritsa Ntchito Madzi Osefera
- Kufupikitsa nthawi yobwezeretsanso filtrate ndikuwongolera kulowa kwa madzi ozizira kapena madzi amvula munjira ya slurry kuti madzi azikhala bwino.
2. Chepetsani Madzi Ochapira a Gypsum
- Chepetsani zinthu za gypsum Cl⁻ pamlingo woyenera. Wonjezerani kuchotsa Cl⁻ panthawi yothira madzi pochotsa slurry ndi gypsum slurry pamene milingo ya Cl⁻ idutsa 10,000 mg/L. Yang'anirani milingo ya Cl⁻ ya slurry ndiInline density mitandikusintha mitengo yotulutsa madzi oyipa moyenerera.
3. Limbitsani Kuwunika kwa Chloride
- Yesani nthawi zonse zomwe zili mu slurry chloride ndikusintha magwiridwe antchito potengera milingo ya malasha sulfure, kuyanjana kwazinthu, ndi zofunikira padongosolo.
4. Control Slurry Density ndi pH
- Sungani kachulukidwe ka slurry pakati pa 1080–1150 kg/m³ ndi pH pakati pa 5.4–5.8. Nthawi ndi nthawi tsitsani pH kuti muwongolere machitidwe mkati mwa chotengera.
5. Onetsetsani Kugwira Ntchito Moyenera kwa Electrostatic Precipitators
- Pewani tinthu tating'onoting'ono tomwe timakhala ndi ma chloride ambiri kuti zisalowe mu chotengera, chomwe chingasungunuke ndikuunjikana mu slurry.
Mapeto
Ma ion a kloridi ochulukirapo amawonetsa kusakwanira kwamadzi otayira, zomwe zimapangitsa kuchepa kwa desulfurization komanso kusalinganika kwadongosolo. Kuwongolera kogwira mtima kwa chloride kumatha kupititsa patsogolo kukhazikika kwadongosolo komanso kuchita bwino. Kwa mayankho ogwirizana kapena kuyesaLonnmeterZogulitsa zothandizidwa ndi akatswiri ochotsa zolakwika patali, lemberani ife kuti mutiwumbireni kwaulere pamiyezo ya slurry density muyeso.
Nthawi yotumiza: Jan-21-2025
