Browse Prior Art Database

Electric Spray Water Treatment

IP.com Disclosure Number: IPCOM000199333D
Original Publication Date: 2010-Sep-09
Included in the Prior Art Database: 2010-Sep-09
Document File: 3 page(s) / 128K

Publishing Venue

Siemens

Related People

Juergen Carstens: CONTACT

Abstract

The global need for clean water is rising continuously. One solution to accommodate the growing demand is the desalination of seawater and brackish water. For any successful water treatment process, a suitable pretreatment is indispensable. Removal of particles for protection of pumps and RO membranes (RO: Reverse Osmosis), disinfection, hardness reduction, conditioning of feed water, e.g., by parameters like pH or alkalinity (pH: Pondus Hydrogenii), scaling inhibition, e.g., for Ca and Mg salts (Ca: Calcium, Mg: Magnesium), and the removal of suspended solids are the main objectives of the pretreatment.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 53% of the total text.

Page 1 of 3

Electric Spray Water Treatment

Idea: Markus Forstmeier, Ph.D., DE-Munich; Florian Krug, Ph.D, DE-Munich

The global need for clean water is rising continuously. One solution to accommodate the growing demand is the desalination of seawater and brackish water. For any successful water treatment process, a suitable pretreatment is indispensable. Removal of particles for protection of pumps and RO membranes (RO: Reverse Osmosis), disinfection, hardness reduction, conditioning of feed water, e.g., by parameters like pH or alkalinity (pH: Pondus Hydrogenii), scaling inhibition, e.g., for Ca and Mg salts (Ca: Calcium, Mg: Magnesium), and the removal of suspended solids are the main objectives of the pretreatment.

Nowadays a conventional pretreatment sequence consists of several steps; it involves high energy consumption and the addition of a large number of chemicals. Adjusting the media filters for varying the system conditions is difficult and the possibilities of process control are limited. In a recent, more advanced approach a membrane unit has been integrated into the pretreatment sequence. So, a better and more defined water quality is achieved. The disadvantages of this system are the complexity of the membrane unit, the high energy consumption and, above all, the limited lifetime of the membrane.

In the following a novel solution is proposed which combines spray atomization with the ionization of the water spray and its ingredients, and applies a pulsed electric field to the water spray. The water to be cleaned is sprayed through nozzles, as depicted in Figure 1. The resulting spray is exposed to a pulsed electric field, this leads to an ionization process. During the spraying, the water is aerated, the microorganisms are killed, and the proteins are flocculated. During the ionization process, controlled by a process control unit, the ionized particles are attracted by the inclined capacitor plate and will be removed; this is depicted in Figure 2. Additionally, an effect of disinfection by the electric field exists which is used these days in water and air purification applic...