Daim Ntawv Thov Kev Ua Phem ntawm Pac Hauv Kho Mob Ntawm Thermal Tsob Nroj

1. Kev kho mob ua ntej

Cov khoom siv dej ntuj feem ntau muaj cov av nkos, av qeeg, cov kab mob uas tsis txaus ntseeg, cov kab mob loj, yog qhov tseem ceeb tshaj plaws ntawm cov dej turbidity, xim thiab tsw. Cov tshuaj organic ntau dhau rau cov organic sau rau cov khoom sib pauv, zom cov khaub ncaws, txo cov khoom sib pauv ntawm cov cob, thiab txawm cuam tshuam rau qhov zoo ntawm kev ua kom zoo. Kev kho mob sib txawv, kev kho kom meej yog txhawm rau tshem tawm cov hom phiaj tseem ceeb tshaj plaws hauv dej yog txo qis dua 5mg / l, kom tau txais cov dej ntshiab. Qhov no yog hu ua sporreatment. Tom qab pretreaticment, dej tuaj yeem siv los ua cov dej boiler tsuas yog thaum muaj kev sib pauv ntawm cov dej ntws tawm hauv cov cua sov lossis nqus dej lossis tshuab. Yog tias cov impurities no tsis raug tshem tawm thawj zaug, tom qab kev kho mob (desalting) tsis tuaj yeem nqa tawm. Yog li ntawd, txoj kev kho dej sib txawv ntawm dej yog qhov txuas tseem ceeb hauv cov txheej txheem kev kho dej.

Cov txheej txheem txheej txheem ntawm thermal fais fab nroj yog raws li nram no: raw dej → co co paulation → prepipitation thiab meej → kev pom. Cov txheej txheem sib xyaw ua ke hauv cov txheej txheem sib xyaw yog polyaluminum chloride, thiab lwm yam hauv qab no yog qhia txog cov polyaluminum chloride.

Polyaluminium chloride, raug xa mus rau li PAC, yog raws li txhuas tshauv lossis cov khoom siv raw thiab cov txheej txheem ntau dua thiab cov khoom lag luam ntau ntxiv tsis zoo ib yam. Molecular cov mis ntawm PAC [Al2 (Oh) nci6-n] m, qhov twg n tuaj yeem yog tus lej ntawm pawg 10. PAC los ntawm ob daim ntawv thiab kua.

2.coaguminationchanism

Muaj peb qho kev cuam tshuam ntawm cov coagulants ntawm colloidal hais hauv dej: Hluav taws xob Neutralization, adsorption bridging thiab cheb tsev. Qhov twg ntawm peb qhov teebmeem no yog qhov tseem ceeb nyob ntawm cov hom thiab noj ntawm cov coagulant, xwm thiab cov ntsiab lus ntawm colloidal hais hauv dej, thiab cov cim ntawm cov dej. Lub tshuab ntawm kev ua ntawm polyaluminum chloride zoo ib yam li ntawd ntawm txhuas sulfate nyob rau hauv cov txheej txheem ntawm al3 + ua ntau hom hydrolyzed.

Polyaluminium chloride tuaj yeem suav tias ntau yam khoom lag luam nruab nrab hauv cov txheej txheem ntawm cov txheej txheem hydrolysis thiab polymerization ntawm txhuas chloride mus rau hauv al (huag) 3 nyob rau qee yam. Nws yog ncaj qha rau hauv dej nyob rau hauv daim ntawv ntawm ntau hom polymeries thiab A1 (Oh) (s), yam tsis muaj cov txheej txheem hydrolysis ntawm AL3 +.

3. Daim ntawv thov thiab cuam tshuam cov ntsiab lus

1. Dej Kub

Cov dej kub muaj qhov cuam tshuam pom tseeb ntawm kev kho cov nyhuv kev kho mob. Thaum cov dej kub yog qhov tsawg, cov hydrolysis ntawm cov coagulant yog qhov nyuaj dua, thiab cov flocculant tsim cov qauv xoob, cov dej muaj dej siab thiab zoo. Thaum cov dej kub yog qhov tsawg, kev sib tsoo ntawm colloidal hais yog txhim kho, lub sijhawm flocculation ntev, thiab cov kev ua kom qeeb. Cov kev tshawb fawb qhia tau tias cov dej kub ntawm 25 ~ 30 ℃ yog qhov haum ntau.

2. PHEEJ HMOOV

Cov txheej txheem hydrolysis ntawm polyaluminum tshuaj chloride yog cov txheej txheem ntawm kev tso ua txuas ntxiv ntawm h +. Yog li ntawd, nyob rau hauv hom Phaj Sib Txawv, yuav muaj ntau tus nqi hydrolysis muaj feem cuam tshuam, thiab cov nqi zoo tshaj plaws ntawm polyaluminum chloride coagulation coagulation feem ntau ntawm 6.5 thiab 7.5. Qhov kev cuam tshuam sib txawv yog siab dua nyob rau lub sijhawm no.

3. Qosage ntawm Coagulant

Thaum cov ntau ntawm cov coagulant ntxiv tsis txaus, qhov tseem ceeb ntawm cov dej paug tawm loj dua. Thaum tus nqi loj heev, vim hais tias cov lus colloidal nyob rau hauv dej adsorb ntau dhau kev hloov pauv, uas ua rau muaj kev hloov pauv hauv lub tshuab hluav taws xob ntxiv. Cov tshuaj tiv thaiv kev sib cais tsis yog siv tshuaj tiv thaiv yooj yim, yog li yuav tsum tau txiav txim siab raws li cov kev suav, tab sis yuav tsum raug txiav txim siab raws li cov dej tsis zoo los txiav txim siab qhov kev siv tshuaj uas tsim nyog; Thaum cov dej zoo hloov raws caij nyoog, cov nqi yuav tsum tau hloov kho raws li.

4. Hu rau Nruab Nrab

Nyob rau hauv cov txheej txheem ntawm kev kho mob los yog lwm yam kev kho mob los nag, yog tias muaj qhov cuam tshuam ntawm kev kho av hauv dej, muaj txiaj ntsig zoo txhim kho. Nws tuaj yeem muab thaj chaw loj thaj chaw, los ntawm kev kos duab, catalysisysy thiab crystallization cov tub ntxhais, txhim kho kev kho mob ntawm kev kho kev sib xyaws.

Coagulation nag lossis daus yog ib txoj kev siv rau dej rau tam sim no. Polyaluminium chloride kev lag luam yog siv los ua cov dej ntws flocculant, muaj ntau yam floagulant kev ua tau zoo, kev kub siab ntau, tus nqi yuav tau txais kev cawmdim 40%. Ua ke nrog kev ua haujlwm ntawm valieless lim thiab ua kom zoo dua cov dej tsis zoo, thiab kev sib pauv peev txheej ntawm cov khoom seem yog nce, thiab tus nqi ua haujlwm raug txo qis.