Device for the continuous electrochemical deionisation with integrated membrane unit

US8652326B2 · kind B2 · utility

Assignee

• Christ Water Technology AG

Inventors

• Jürgen Johann · Leimen, DE
• Thomas Menzel · Hilten, DE
• Monique Bissen · Pforzheim, DE
• Thomas Schramm · Lörrach, DE
• Christian Brand · Hettenleidelheim, DE

Key dates

• Filing date: Sep 25, 2012
• Grant date: Feb 18, 2014
• Expiry date: Sep 25, 2032

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02A20/131
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A device for the electrodeionization of an aqueous electrolyte solution, comprises an electrodeionization module (1), an ultrafiltration module (21, 22, 1201, 1202, 1203) and a connection piece (3, 10) which connects the electrodeionization module (1) and the ultrafiltration module (21, 22, 1201, 1202, 1203) such as to be able to guide a diluate produced from the electrolyte solution during operation of the device in the electrodeionization module (1) from the electrodeionization module (1) to the ultrafiltration module (21, 22, 1201, 1202, 1203); wherein the connection piece (3, 10) is devoid of an adjustable pressure-maintaining valve. Via the pressure drop occurring in the ultrafiltration modules (21, 22, 1201, 1202, 1203), these devices build up a counter pressure behind the electrodeionization module (1) which is sufficient to ensure the packing density of the ion exchanger in the electrodeionization module (1).