The diffusion dialysis sulfuric acid recovery system is a high-efficiency separation solution designed for the resource recovery of acidic wastewater in the formation foil industry. It is mainly used to treat waste streams containing sulfuric acid/sulfate aluminum and nitric acid/nitrate aluminum generated during the etching process.
By applying diffusion dialysis technology, the system efficiently separates acids from metal salts, enabling the recovery and reuse of sulfuric and nitric acids. This approach replaces traditional neutralization methods, significantly reducing sludge generation and salt load, while improving both environmental and economic performance.
Diffusion dialysis is based on selective ion transport driven by a concentration gradient. A concentration difference is established across an anion exchange membrane between the waste acid solution and water. Without the need for external pressure, acid molecules preferentially migrate through the membrane to the water side under the driving force of the concentration gradient, achieving acid transfer and enrichment.
At the same time, metal ions are effectively retained due to the membrane’s selectivity. Continuous operation enables the separation and recovery of sulfuric and nitric acids, while reducing the concentration of metal ions in the remaining solution, allowing for efficient resource reuse.
• High acid recovery efficiency: Sulfuric and nitric acid recovery rates can exceed 80%, significantly improving resource utilization
• Excellent separation performance: Metal ion rejection rate exceeds 90%, effectively reducing impurities
• Low energy consumption: Driven by concentration difference without high-pressure operation, resulting in low operating costs
• Reduced sludge generation: Replaces traditional neutralization processes, greatly lowering sludge volume and salt content
• Proven and reliable technology: Widely applied in the formation foil industry, with high adoption rates
• Continuous operation: Supports stable, continuous processing to meet industrial production requirements
• Formation foil etching wastewater treatment: Separation and recovery of sulfuric acid/sulfate aluminum and nitric acid/nitrate aluminum systems
• Acidic wastewater recycling: Regenerates and reuses waste acids, reducing fresh acid consumption
• Fine chemical waste acid treatment: Suitable for separation and purification of acidic streams containing metal ions
• Environmental protection systems: Reduces salt and heavy metal content in wastewater, easing discharge pressure
• Industrial cleaning and etching solution recovery: Applicable to similar acidic systems for regeneration and reuse
• Green manufacturing processes: Supports cleaner production and sustainable development in chemical and materials industries
7*24h Service Online
