Patent DE-102007000709-A1 (DE)
Title: Device for degassing a fluid or pasty medium such as coating color for coating of paper web or cardboard, comprises low pressure chambers connected to each other in which a low pressure is generatable, and inlet and outlet arrangements
Inventor: MENDEZ-GALLON BENJAMIN
IPC: B01D19/00
Filed: 2007-09-07
Abstract: The device for degassing a fluid or pasty medium (10a, 10b, 10c) such as coating color for coating of paper web or cardboard, comprises low pressure chambers (28a, 28b, 28c) connected to each other in which a low pressure is generatable, an inlet arrangement (16), which guides the medium in the low pressure chamber, an outlet arrangement (22), which discharges the medium from the low pressure chamber, and distribution elements. The inlet arrangement comprises inlet units and the outlet arrangement comprises outlet units. The device for degassing a fluid or pasty medium (10a, 10b, 10c) such as coating color for coating of paper web or cardboard, comprises low pressure chambers (28a, 28b, 28c) connected to each other in which a low pressure is generatable, an inlet arrangement (16), which guides the medium in the low pressure chamber, an outlet arrangement (22), which discharges the medium from the low pressure chamber, and distribution elements. The inlet arrangement comprises inlet units and the outlet arrangement comprises outlet units. Each low pressure chamber is assigned to the inlet unit and the outlet unit, which exchange the media respectively with the low pressure chambers. The device comprises a low pressure source (32) and/or a connection for the low pressure source. The first low pressure chamber is directly connected with the low pressure source and the second low pressure chamber is connected with the first low pressure chamber for producing low pressure in the second low pressure chamber. The low pressure chambers are limited by walls, which prevent the passage of the medium from the low pressure chamber into other low pressure chamber or the discharge of the medium from the arrangement of the low pressure chamber. The low pressure chambers are arranged segmentally to each other in nested manner. The first low pressure chamber is sealed for maintaining the low pressure towards outside and is connected to the low pressure source and the second low pressure chamber is mounted completely within the first low pressure chamber. The second low pressure chambers are nested to each other from external towards internal. The second low pressure chamber is limited segmentally by a wall allowing the production of low pressure in the second low pressure chamber. The wall of the second low pressure chamber has openings or a membrane section, which is permeable for the production of low pressure until preventing the passage of the medium. One of the distribution elements is arranged in each of the low pressure chamber to distribute the medium within the low pressure chamber. The distribution elements are mounted on a common holding device. The distribution elements are movably driven by a common drive unit and comprise rotating distribution plates, which are arranged on a common rotation shaft that is driven by the drive unit. The medium comprises a binding agent and a pigment and has a solid material content of 50-80 wt.% and/or a viscosity of 700-4000 mPas. An independent claim is included for a processing plant for processing of fluid/pasty medium.