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    Ultra pure water systems in other industries

    Ultra pure water systems in other industries

    Ultra pure water is widely used in solar photovoltaics, optical photovoltaics, new energy and new materials LED、PCB、 Industries such as sapphire.

    Technical specifications for national electronic grade ultrapure water

    Project

    Specification

    EW-I

    EW-Ⅱ

    EW-Ⅲ

    EW-IV

    Resistivity(25℃)/MQ ·cm

    ≥18

    (5% of the time not less than 17)

    ≥15

    (5% of the time not less than 13)

    ≥12.0

    ≥0.5

    All silicon/(μg/L)

    ≤2

    ≤10

    ≤50

    ≤1000

    Particle count/(pcs/L)

    0.05μm~0.1μm

    500

    -

    -

    -

    0.1μm~0.2μm

    300

    -

    -

    -

    0.2μm~0.3μm

    50

    -

    -

    -

    0.3μm~0.5μm

    20

    -

    -

    -

    >0.5μm

    4

    -

    -

    -

    Number of bacteria/(pcs/mL)

    ≤0.01

    ≤0.1

    ≤10

    ≤100

    Copper/(μ g/L)

    ≤0.2

    ≤1

    ≤2

    ≤500

    Zinc/(μg/L)

    ≤0.2

    ≤1

    ≤5

    ≤500

    Nickel/(μg/L)

    ≤0.1

    ≤1

    ≤2

    ≤500

    Sodium/(μ g/L)

    ≤0.5

    ≤2

    ≤5

    ≤1000

    Potassium/(μ g/L)

    ≤0.5

    ≤2

    ≤5

    ≤500

    Iron/(μ g/L)

    ≤0.1

    -

    -

    -

    Lead/(μ g/L)

    ≤0.1

    -

    -

    -

    Fluorine/(μ g/L)

    ≤1

    -

     

     

    Chlorine/(μ g/L)

    ≤1

    ≤1

    ≤10

    ≤1000

    Nitrite/(μ g/L)

    ≤1

    -

    -

    -

    Bromine/(μ g/L)

    ≤1

    -

    -

    -

    Nitrate radical/(μ g/L)

    ≤1

    ≤1

    ≤5

    ≤500

    Phosphate radical/(μ g/L)

    ≤1

    ≤1

    ≤5

    ≤500

    Sulfate radical/(μ g/L)

    ≤1

    ≤1

    ≤5

    ≤500

    Total organic carbon/(μ g/L)

    ≤20

    ≤100

    ≤200

     

     

    Typical ultra pure water process flow

    Process features: Most of the salt in the water is removed by reverse osmosis, and the MB system is used to produce high-purity water in the later stage, which can effectively prolong the regeneration cycle of the MB system and reduce the use of acid and alkali.

     

    Improve the pure water process flow

    Process characteristics: The emergence of reverse osmosis and EDI has changed the low desalination efficiency of traditional anion/cation beds, completely abandoning the use of acid and alkali, and achieving green production throughout the entire process.

    Full membrane pure water process flow

    Process characteristics: The full membrane water treatment process further optimizes and improves the pretreatment system, enhances the pretreatment effect, broadens the inlet conditions, and can effectively achieve the recycling and reuse of reclaimed water.