RU2420346C1 - Method of producing tangential filtration membrane module - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to designing devices intended for separation of liquids or gases, e.g. for air and water cleaning, blood separation in plasmapheresis, etc, with the help of folded membrane elements. Proposed method comprises making folded membrane structure, flow distribution and drain devices, sealing produced structure and potting its faces by sealant. Prior to producing folded structure, membrane as-melted is jointed, by heat, ultrasound or glue, to sidewalls, drain and flow distribution channels. Then, folded structure is produced, top and bottom covers and sidewalls are jointed thereto, and inner space between inlet and outlet branch pipes of top cover is sealed.

EFFECT: simplified production, higher quality of separation.

6 dwg

Description

The invention relates to methods for creating devices for separating liquid or gaseous media (for example, for purifying water, air, blood separation by plasmapheresis, etc.) using folded-type membrane elements.

Closest to the present invention is a method of manufacturing a membrane module of tangential filtration, including the operation of forming a folded structure from a membrane, flow distribution and drainage devices, sealing this structure together with the upper, lower covers and side walls and filling its ends with sealant (see patent FR 2174821, C. B01D 63/14, publ. 10/19/1973). The disadvantage of this method is the technological complexity of folding a thin and flexible membrane into a large number of tightly adjacent folds and the subsequent laying of flow distribution and drainage devices in each fold.

The objective of the invention is to remedy these disadvantages. The technical result consists in simplifying manufacturing techniques and improving the quality of the separation of media using the resulting module. The problem is solved, and the technical result is achieved by the fact that the method of manufacturing the membrane module of tangential filtering includes the operation of forming a folded structure from the membrane, flow distribution and drainage devices, sealing this structure together with the upper and lower covers and side walls and filling its ends with sealant, and up to the process of forming a folded structure, the membrane in the expanded state is connected thermally, ultrasonic or adhesive way from the sides walls, drainage and flow distribution elements, they form a folded structure, attach the top cover and side walls and seal the space between the top cover, flow distribution elements, side walls and the vertices of the membrane folds in the gap between the inlet and outlet pipes of the upper cover.

Figure 1 schematically shows a membrane module;

figure 2 is a section aa along the axis of the inlet pipe of the upper cover;

figure 3 is a section bb along the axis of the outlet pipe of the lower cover;

figure 4 shows a flow-distributing device with a relief pattern made on both sides thereof;

figure 5 - drainage device made on both sides of the embossed pattern;

figure 6 - membrane in a straightened state with attached side walls, flow distribution and drainage devices.

The manufactured membrane module consists of an upper cover 1 with a nozzle 2 for supplying a filtered mixture and a nozzle 3 for discharge of concentrate, side walls 4, a lower cover 5 with a nozzle 6 for extracting the filtrate and placed in the space between the upper 1 and lower 5 covers and side walls 4 of a zigzag folded track membranes 7 with drainage 8 and flow distribution devices 9 located between its folds. The flow-distributing and drainage devices can be made in the form of thin plates with a relief pattern applied on both sides of them, forming channels for the passage of the filtered medium and the removal of the filtrate. As a drainage or flow distribution device, you can also use a polymer mesh woven or knitted weave. Polyolefins, for example ethylene vinyl acetate, can be used as a material for the manufacture of flow distribution and drainage devices, side walls, upper and lower covers. The ends of the zigzag folded membrane 7 together with the ends of the upper 1 and lower 5 covers and side walls 4 are placed in the sealant layer 10, and the space 11 between the upper cover 1, the flow distributors 9, the side walls 4 and the vertices of the folds of the membrane 7 between the inlet 2 and output 3 nozzles of the top cover 1 is sealed. The first and last folds of the membrane 7 are hermetically connected to the inner surfaces of the side walls 4. The membrane module is made as follows. Prior to the formation of the folded structure, the side walls 4 and the flow distributing devices 9 are laid out in a certain order, the membrane strip 7 is laid on them, and the drainage devices 8 are laid out in a certain order on it. In places close to the ends, the flow-distributing 9 and drainage 8 devices and side walls 4 are connected by a thermal, ultrasonic or adhesive method with the membrane 7 in the molten state. Then, a folded structure is formed, that is, all of the above is folded into a zigzag package. The upper 1 and lower 5 covers are hermetically connected to the side walls 4, and the ends of the obtained membrane module are filled with sealant. Then seal the space between the upper cover, the flow distribution elements, the side walls and the vertices of the folds of the membrane in the gap between the inlet and outlet pipes of the upper cover.

The resulting module has a relatively low cost while maintaining high quality filtering. The manufacturing process is greatly simplified, which reduces the amount of marriage.

Claims (1)

A method of manufacturing a tangential filtering membrane module, including the operation of forming a folded structure from the membrane, flow distribution and drainage devices, sealing this structure together with the upper, lower covers and side walls and filling its ends with sealant, characterized in that before the process of forming the folded structure, the membrane is expanded state are connected by thermal, ultrasonic or adhesive method with side walls, drainage and flow distribution elements Tammy, produce formation of a folded structure attached top and bottom covers and side walls and seal the space between the upper cover, potokoraspredelitelnymi elements sidewalls and tops of the folds of the membrane between the inlet and outlet of the top cover.

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