Kev faib cov dej
1. Cov dej hauv av thiab dej saum npoo av
Dej hauv av - muaj tsawg dua cov organic thiab microbial kuab paug, thaum calcium magnesium plasma dissolves ntau dua thiab muaj zog dua, ua rau nws yooj yim rau scaling; Qee zaum hlau / manganese / fluoride ions tshaj tus qauv thiab tsis tuaj yeem ua tau raws li qhov xav tau ntawm kev tsim khoom thiab kev siv dej hauv tsev.
Nto dej - muaj kuab paug organic thiab microbial ntau dua li dej hauv av. Yog hais tias thaj chaw yog thaj chaw limestone, cov dej saum npoo feem ntau muaj zog dua.
2. Cov dej khov thiab dej mos
Cov dej tawv - Tag nrho cov concentration ntawm hlau ions xws li calcium thiab magnesium nyob rau hauv dej yog hu ua hardness. Cov dej tawv muaj qhov cuam tshuam loj rau cov dej ntau lawm xws li boilers, thiab nws yuav tsum tau softened / desalinated. Lub hardness ntau dua 200mg / L feem ntau hu ua cov dej tawv.
Cov dej mos - dej nrog qis hardness. Nws feem ntau hais txog kev txo lossis tshem tawm cov ntsiab lus ntawm calcium thiab magnesium ions hauv dej rau qee yam.
3.Raw dej thiab purified dej
Cov dej nyoos - feem ntau yog hais txog kev nkag mus ntawm cov khoom siv kho dej, xws li cov dej siv hauv nroog uas nquag siv (nrog lub npe hu ua dej haus hauv tsev) / suburban av / dej sab nraum zoov, thiab lwm yam. Cov dej zoo feem ntau ntsuas los ntawm TDS tus nqi (tag nrho cov ntsiab lus yaj hauv dej), thiab TDS tus nqi ntawm Suav nroog kais dej feem ntau yog 100-400ppm.
Purified dej - Tom qab raug kho los ntawm cov chaw kho dej, cov dej nyoos hu ua dej huv.
4. Cov dej ntshiab thiab dej distilled
Dej ntshiab - Tom qab tau kho nrog cov chaw kho dej ua tiav xws li rov qab osmosis thiab cov cuab yeej ua kom tsis muaj menyuam, cov dej nyoos tshem tawm feem ntau ntawm cov ntsev inorganic ions, kab mob, thiab cov organic impurities, ua rau nws cov dej ntshiab uas tuaj yeem siv ncaj qha.
Cov dej distilled - Dej ntshiab npaj los ntawm distillation, feem ntau tsis siv rau haus.
5.Pure dej thiab ultrapure dej
Dej ntshiab - deionized dej npaj los ntawm txoj kev xws li rov qab osmosis, distillation, thiab ion pauv, nrog ib tug TDS tus nqi feem ntau 0.1M Ω. cm).
Ultra ntshiab dej - tau los ntawm kev ntxiv purifying thiab deionizing dej ntshiab siv txoj kev xws li ion pauv, distillation, thiab electrostatic desalination, nrog ib tug unmeasurable TDS tus nqi thiab conductivity feem ntau 10M Ω. cm), nws ions yuav luag tag nrho. Qhov theoretical purest dej tsis kam tus nqi yog 18.25 M Ω. cm.