Industrial Wastewater Treatment and Alkaline Recovery Electrodialysis Unit

Rubri es competente en tecnología de diálisis por difusión y tiene experiencia en el diseño e implementación de soluciones personalizadas, brindando a los clientes soluciones integrales de producción limpia y ecológica.

Rubri es competente en tecnología de electrodiálisis de membrana bipolar y tiene experiencia en el diseño e implementación de soluciones personalizadas, brindando a los clientes planes integrales de producción ecológica y limpia.

Principio básico de la electrodiálisisEl núcleo de la tecnología de electrodiálisis radica en la combinación del campo eléctrico y la tecnología de membrana selectiva, con el principio específico dividido en dos partes:1. Efecto impulsor del campo eléctrico de CCBajo la acción de un campo eléctrico de CC, los aniones y cationes en la solución se mueven direccionalmente: los cationes migran hacia el electrodo negativo, mientras que los aniones migran hacia el electrodo positivo.2. Efecto de tamizado selectivo de las membranas de intercambio iónicoEn el sistema se utilizan dos tipos de membranas de intercambio iónico para lograr la separación de iones:Membrana de intercambio catiónico: Solo permite cationes (p. ej., Na+, California2+, Mg2+) para pasar, mientras bloquea los aniones.Membrana de intercambio aniónico: Solo permite aniones (p. ej., Cl-, ENTONCES42-) para pasar, mientras bloquea los cationes.

This technology is based on the principle of bipolar membrane electrodialysis. Under the action of a direct current electric field, it utilizes bipolar membranes to efficiently dissociate water molecules into hydrogen ions and hydroxide ions. This process then directionally converts salts in electroplating wastewater (such as sodium chloride, sodium sulfate, etc.) into corresponding acids (such as hydrochloric acid, sulfuric acid) and alkalis (such as sodium hydroxide), achieving the dual objectives of wastewater purification and resource recovery.

Core Principle of Electrodialysis The core of electrodialysis technology lies in the combination of electric field and selective membrane technology. Its specific principle is divided into two parts: Driving Effect of DC Electric Field and Concentration GradientUnder the action of a DC electric field or concentration gradient, anions and cations in the solution move directionally: cations migrate toward the negative electrode, while anions migrate toward the positive electrode; solutes move from high-concentration solutions to low-concentration ones. Selective Sieving Effect of Ion Exchange MembranesTwo types of ion exchange membranes are used in the system to achieve ion separation: Cation Exchange Membrane: Only allows cations (e.g., Na⁺, Ca²⁺, Mg²⁺) to pass through, while blocking anions. Anion Exchange Membrane: Only allows anions (e.g., Cl⁻, SO₄²⁻) to pass through, while blocking cations.

Core Principle of Bipolar Membrane Electrodialysis (BPED) The core of BPED technology lies in the combination of electric field, selective membrane technology, and the unique water-splitting capability of bipolar membranes. 1. Driving Effect of DC Electric FieldUnder a DC electric field, ions migrate directionally: cations move toward the cathode, while anions move toward the anode. 2. Membrane Functions Bipolar Membrane (BPM): Splits water ( H2​O ) into H+ and OH− ions under the electric field, providing a source for acid and base production. Cation Exchange Membrane (CEM): Selectively allows cations to pass through. Anion Exchange Membrane (AEM): Selectively allows anions to pass through. By arranging these membranes alternately, salts can be converted into corresponding acids and bases.