SU1560279A1 - Membrane web element - Google Patents

Abstract

The invention relates to the field of desalination and desalination of natural and wastewater by reverse osmosis. The invention makes it possible to increase the reliability of the membrane element by providing a permanent connection due to the attachment of a bonding layer to the interaction zone of the membranes with a turbulator-separator. The rolled membrane element is installed in the housing 1, consists of a perforated drainage tube 2, membranes 3 concentrically arranged with respect to it, the space between which is filled with alternating layers of separator 4 made of fibers, drainage 5 and fastening layer 6. In the zone of interaction of the membranes with a separator-turbulator there is a layer fastening them. The original solution through the opening in the housing 1 enters the intermembrane spaces in which the layers of the turbulator-separator 4 are located, moves along them and is discharged as a concentrate from the housing 1. Part of the initial solution is filtered through the membranes 3. The permeate flows through the drainage layer into the perforated drainage tube 2 and discharged from housing 1. 2 Il.

Description

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The invention relates to water supply and wastewater treatment in various industries, more specifically to the field of desalination and desalting of natural and wastewater by reverse osmosis, and can be used in reverse osmosis plants with a high percentage of desalted water.

The purpose of the invention is to increase the service life by preventing the formation of sludge.

FIG. 1 shows a rolled membrane element mounted in the housing, a longitudinal section; in fig. 2 - the unit of interaction of the membrane with the fiber of the turbulizer-separator with the bonding layer.

The rolled membrane element is installed in the housing 1 and consists of a perforated drainage tube 2, membranes 3 concentrically arranged with respect to it, the spaces between which are filled with alternating layers of separator 4 made of fibers, and drainage 5.

The interfaces of the membranes 3 with the turbulator separator 4 are possible stagnant zones. In order to prevent the formation of deposits of poorly soluble compounds in the places of interaction of the membranes with the turbulator-separator, a layer 6 is fastened together in a single whole.

Roll membrane element works as follows.

The original solution through the hole in the housing 1 enters the intermembrane spaces in which the layers of the turbulator-separator 4 are located, moves along them and

the concentrate is discharged from the housing 1. A part of the initial solution is filtered through the membranes 3. The permeate through the drainage layer 5 enters the perforated water outlet pipe 2 and is discharged from the housing 1.

The formation of precipitates of slightly soluble substances is mainly affected by stagnant zones formed in the roll elements at the points of contact of the turbulant grid with the membrane surface.

It is this lack of design of existing roll elements that causes the fragility of their work, regardless of the type of turbulizers used and the flow directions.

The elimination of contact points of the turbulizer with the membrane makes it possible to achieve the effect of reliable operation of the membrane element without signs of the formation of crystalline deposits on the membrane.

Claims (1)

Invention Formula A membrane rolled element installed in the housing and consisting of a perforated drainage tube, membranes concentrically arranged with respect to it, the spaces between which are filled with alternating layers made of fibers of a separator-0 body, contacting the membranes, and drainage, differing By the fact that, in order to increase the service life by preventing the formation of sludge, the fibers of the turbulator separator are connected to the membrane at the points of contact. FIG. 2