Application Overview
Salt content of brine wells is up to 30g/L, has gradually become the main raw materials for chlor-alkali industry. Untreated brine contains large amounts of sulfate radical, which can easily lead to the anode discharging effect with electrolysis during chlor-alkali ion-exchange membrane process, and damage the anode. To avoid this situation, sulfate radical need to be reduced by denitrification process.
Using tubular membrane and nanofiltration membrane in the brine refining treatment, the sulfate radical in the permeate after the nanofiltration is less than 0.5g/L, fully satisfies the requirements of the chlor-alkali industrial production. In addition, concentrate after nanofiltration contains large amount of sulfate radical up to levels of 90g/L, far greater than the high-nitrate water, 30g/L standard. It can be used as Glauber's salt water to freeze, denitrate and extract Glauber's salt, which is another basic raw material.
Process Diagram
Advantages
1. Tubular membrane process as the pretreatment, significantly reduced the service load of nanofiltration system.
2. Good flux recovery, easy to clean.
3. High degree of automation systems, low cost of labor.
4. Reasonable process configuration, high flux.
5. Permeate reuse has significant economic benefits, lower cost of production.
6. Not only meet the chlor-alkali industrial production needs, but also opens up new market.
Application Overview
Salt content of brine wells is up to 30g/L, has gradually become the main raw materials for chlor-alkali industry. Untreated brine contains large amounts of sulfate radical, which can easily lead to the anode discharging effect with electrolysis during chlor-alkali ion-exchange membrane process, and damage the anode. To avoid this situation, sulfate radical need to be reduced by denitrification process.
Using tubular membrane and nanofiltration membrane in the brine refining treatment, the sulfate radical in the permeate after the nanofiltration is less than 0.5g/L, fully satisfies the requirements of the chlor-alkali industrial production. In addition, concentrate after nanofiltration contains large amount of sulfate radical up to levels of 90g/L, far greater than the high-nitrate water, 30g/L standard. It can be used as Glauber's salt water to freeze, denitrate and extract Glauber's salt, which is another basic raw material.
Process Diagram
Advantages
1. Tubular membrane process as the pretreatment, significantly reduced the service load of nanofiltration system.
2. Good flux recovery, easy to clean.
3. High degree of automation systems, low cost of labor.
4. Reasonable process configuration, high flux.
5. Permeate reuse has significant economic benefits, lower cost of production.
6. Not only meet the chlor-alkali industrial production needs, but also opens up new market.