Kev kho mob ua ntej los ntawm MVR
Lub pretreatment theem yog softening ntawm industrial wastewater, feem ntau yog mannite-lime flue gas txoj kev, uas tshem tawm ntau cov cations los ntawm cov dej khib nyiab, yog li txo tus nqi ntawm fouling nyob rau hauv industrial wastewater.
Hauv kev kho mob ua ntej softening, txiv qaub kua txiv thiab mannitol ntxiv thiab cov dej khib nyiab hauv kev lag luam yog centrifuged hauv centrifuge, tom qab ntawd cov tshuaj yaj yog kho los ntawm MVR system.
Hauv cov txheej txheem no, tus nqi pH raug kho raws li qhov yuav tsum tau ua ntawm MVR system thiab txoj kev kho cov dej khib nyiab. Cov impurities muaj nyob rau hauv cov dej khib nyiab yog kho los ntawm flue gas, thiab cov ntawv xov xwm no raug tshem tawm los ntawm nag lossis daus thiab tom qab ntawd lim los ntawm ceramics.
Cov teeb meem raug tshem tawm hauv cov dej khib nyiab hauv kev lag luam raug txo qis, feem ntau tsis pub ntau tshaj 0.001 feem pua .
Tom qab pretreatment, cov calcium ions thiab precipitates nyob rau hauv cov dej khib nyiab yog txo, thiab MVR evaporation txheej txheem yog siv los kho ntau yam ntsev uas muaj nyob rau hauv cov dej khib nyiab, xws li sodium chloride, kom tsis txhob scaling teeb meem nyob rau hauv tag nrho cov system.
evaporation thiab crystallization
Cov theem no yog siv MVR system rau crystallization. Nyob rau hauv tus txheej txheem, cov dej khib nyiab yog pub rau hauv lub tank txias ntawm MVR thiab scale inhibitors tau ntxiv kom qeeb qhov kev ntsuas hauv cov raj kub sib hloov.
Lub deaerator yog siv los cais cov roj uas tsis yog-condensable los txhim kho qhov ua tau zoo ntawm cov cua sov hloov pauv thiab nce qhov hloov pauv.
MVR system tuaj yeem evaporate ntau tshaj 80 feem pua ntawm cov dej. Nyob rau hauv cov txheej txheem no, ib tug centrifugal compressor thiab ib tug peb-ntev mix-flow yuam kev ncig evaporator yuav siv tau los ua kom tiav ob chav.
Daim ntawv thov kev sib xyaw ua ke tuaj yeem txhim kho qhov ua tau zoo ntawm evaporation, thaum txo cov nqi peev thiab lwm yam kev siv hluav taws xob.
Centrifugal ziab
Kev ziab centrifugal feem ntau ua tiav los ntawm centrifugation, ziab thiab ntim.
Tom qab centrifugation, cov dej ntsiab lus ntawm cov khoom yog kwv yees li 5 feem pua, thiab cov ntsiab lus dej siab dhau lawm, yog li cov khoom yog rhuab los ntawm chav kub exchanger thiab ces qhuav. Qhov kub ntawm lub tshuab ziab khaub ncaws yog tswj ntawm 140 degree.
Tom qab cov khoom ntub dej qhuav, crystalline ntsev yog tsim.
MVR system tsis tuaj yeem ua kom tiav kev kho cov dej khib nyiab hauv kev lag luam, tab sis kuj tseem tuaj yeem ua kom tshem tawm cov ntsev crystalline uas muaj nyob rau hauv cov dej khib nyiab, uas ua kom zoo dua ntawm kev siv cov peev txheej.