Diffusion dialysis equipment is a use of semi-permeable membrane or select the i≥on exchange membrane through the ion exchange solution from the high concentration side of the αmembrane through the membrane to the low concentration side of the technical equipment. This te&chnique is based on the concentration difference as a♠ driving force, so also known as concentration dialysis or natural dialysis. It is mainly λused for the separation and purification of organic and inorganic electrolytes. In the enviroδnmental engineering is mainly used for acid and alkali was≥te treatment and recovery.

Diffuse dialysis equipment to recover waste acid

The diffusion dialysis apparatus is a series of structural u★nits composed of a certain number of membranes; each of which is separated by an anioni•c homogeneous membrane into a dialysis chamber and a diffusion chamber, which is o•perated by countercurrent operation on both sides of the anionic homo∏geneous membrane When the waste acid and the receiving liquβid (tap water) are added, the concentration of acid and ₹its salt on the waste acid side is much higher than that on the side ™of the water. According to the diffusion dialysis principle, the waste acid£ and its salts are present due to the concentration gradient Diffusion chamber penetratioπn trend, but the membrane has a selective permeability of the anion, so under the eff↔ect of poor concentration, the waste acid side of the ani<on is attracted and smoothly through the membrane channel into the water side. At the s↑ame time, according to the neutral requirements, will also entrain the cation, because theΩ H + hydration radius is relatively small, less charge; and metal salt hydrati÷on radius is larger, more charge, so H + will pass through the membrane, so waste the ‍acid will be separated.
 
Application areas: steel, chemical foil, battery, tit₩anium dioxide, wet copper, aluminum, polysilicon, electroplating, titanium processing, wood sacchar±ification, rare earth and other non-ferrous metal smeltiεng and other industrial fields. The recovery rate of acid on the device can reach more than 80%, m×etal ion removal rate of 90% or more.

Application of Diffusion Dialysis Equipment

1. Application of membrane diffusion dialysis equipment in chemical foil i ndustry
Chemical foil corrosion process, resulting in a lot of waste acid. These waste acid∞ emissions (even with lime and neutral), not only cause waste of resources, so that‍ product costs increase, but also lead to serious environmental pollution, ♥affecting and restricting the survival and development of enterpriseπs. To a medium-sized low-voltage electrode foil production enterprises, for¥ example, daily emissions of 15 to 20% of 30 tons of waste h¶ydrochloric acid, equivalent to waste 15 to 20 tons of £31% of the finished acid. The use of diffusion dialysis technology, which can effectively← recover the hydrochloric acid, hydrochloric acid to save the economic benefits of more than 200Ω,000 yuan, but also to solve the problem of environmental pollution, economic and social benefit↕s is very impressive.



2. Application of film diffusion dialysis equipment in aluminum♥ industry

Aluminum anodic oxidation process, resulting in a lo t of waste acid. These waste acid if the neutral tσreatment is not only the full use of acid, and consume a lot of≥ alkali. General aluminum anodic oxidation of the waste acid concentration of 18%, metal i≤on concentration of 1.5%, with a diffusion dialysis treatment of the acid solδution, which can recover more than 85% of the acid comp$osition, and the retention of aluminum ions can also be achieved 90%. Recovery acid solution ac•id concentration is stable, the subsequent acid with easy, an‌d homogeneous material on the production of small impact.

3. Application of film diffusion dialysis equipment in PS version industry

In the production of printing PS version of the process, resulting in a large> number of hydrochloric acid liquid, sulfuric acid and other waste liquid emissions. Not ‍only cause waste of resources, so that product cos₽ts increase, but also lead to serious environmental pollutφion, affecting and restricting the survival and development ≠of enterprises. The use of diffusion dialysis technology for the treatment of ≤waste liquid, not only the majority of aluminum ions to remov₩e the waste liquid recycling cycle, while stabilizing the production of dielec≥tric and oxidation solution fluctuations, to promote the pro​duction of PS version of the quality improvement.