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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.

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Technical specifications for national electronic grade ultrapure water

Project		Specification
Project		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.

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