CN217340858U

CN217340858U - Novel asymmetric metal filtering membrane

Info

Publication number: CN217340858U
Application number: CN202221003410.8U
Authority: CN
Inventors: 王再雄
Original assignee: Nanjing Xiong Kai Filter Equipment Co ltd
Current assignee: Nanjing Xiong Kai Filter Equipment Co ltd
Priority date: 2022-04-28
Filing date: 2022-04-28
Publication date: 2022-09-02
Anticipated expiration: 2032-04-28

Abstract

The utility model discloses a novel metal filtering membrane with an asymmetric structure, which comprises a framework layer, a wire mesh layer and a powder layer, wherein the wire mesh layer is arranged above the framework layer, and the powder layer is arranged above the wire mesh layer; the framework layer is a punched pipe, the diameter of a punched hole is 1-5mm, and the thickness of the punched hole is 1-10 mm; the porosity of the silk screen layer is 50-100 μm, and the porosity of the silk screen layer is 60%; the thickness of the powder layer is 0.2-0.3mm, the utility model has the advantages that: the filtering precision of the metal membrane filter element can be effectively improved to submicron level, and the regeneration effect is ensured; under the same filtering precision, the filtering flux is improved by 3-5 times compared with the traditional metal membrane; and through the stability of spraying the rete, can effectually ensure that the powder bed is difficult to drop.

Description

Novel asymmetric metal filtering membrane

Technical Field

The utility model relates to a metal filtration membrane technical field specifically is a novel asymmetric structure's metal filtration membrane.

Background

The membrane separation technology has the characteristics of high efficiency, energy conservation and no pollution, and becomes one of the high-tech industries with the most development prospect in the century. The inorganic film is generally made of a ceramic or metal material. The metal film has the advantages of high temperature resistance, high pressure resistance, strong corrosion resistance, good toughness, large flux and the like, and is widely applied. However, the metal membrane has some defects, and the traditional metal membrane filtration precision is mostly in the micron-scale range. If the separation accuracy is to be made to a submicron level (for example, 0.1 μm), a finer metal powder is used. The metal film thus produced has low porosity and high flow resistance. Traditional metal membranes use the principle of deep bed filtration, which causes clogging when solids enter the internal structure for which they are intricately responsible. The effect is not very good only through back flushing, which affects the service life.

In recent years, a method for spraying a layer of fine metal powder on the outer side of a thicker metal filter element is adopted to produce a metal membrane filter element with an asymmetric structure so as to solve the problems, but the problems that a membrane layer is easy to fall off, the cost is high, the flux increasing effect is not obvious and the like exist.

Disclosure of Invention

An object of the utility model is to provide a novel asymmetric structure's metal filtration membrane to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above purpose, the utility model provides a following technical scheme: the novel metal filtering membrane with the asymmetric structure comprises a framework layer, a wire mesh layer and a powder layer, wherein the wire mesh layer is arranged above the framework layer, and the powder layer is arranged above the wire mesh layer;

the framework layer is a punched pipe, the diameter of a punched hole is 1-5mm, and the thickness of the punched hole is 1-10 mm;

the porosity of the silk screen layer is 50-100 μm, and the porosity of the silk screen layer is 60%;

the thickness of the powder layer is 0.2-0.3 mm.

Preferably, the silk screen layer is made by sintering five layers of silk screens.

Preferably, the powder layer is uniformly distributed on the surface of the silk screen layer in a spraying mode.

Preferably, the silk screen layer is fused with the powder layer in a vacuum sintering mode.

Compared with the prior art, the beneficial effects of the utility model are that: the novel metal filtering membrane with the asymmetric structure can effectively improve the filtering precision of the metal membrane filter element to a submicron level and ensure the regeneration effect; under the same filtering precision, the filtering flux is improved by 3-5 times compared with the traditional metal membrane; and through the stability of spraying the rete, can effectually ensure that the powder bed is difficult to drop.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure: 1. a framework layer; 2. a silk screen layer; 3. a powder layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, the present invention provides a technical solution: the novel metal filtering membrane with the asymmetric structure is cylindrical and comprises three layers, wherein the innermost side is a framework layer 1, the middle part is a metal sintering wire mesh layer 2, the pore size is 50-100 mu m, the porosity can reach 60%, the outermost side is a powder layer 3, and the thickness is 0.2-0.3 mm.

The framework layer 1 is a punching pipe, and the diameter of the punching pipe is 1-5 mm; the middle is a silk screen layer 2, the filtering precision of the silk screen is 50-100 mu m, the silk screen is formed by sintering five layers of silk screens, and the porosity is 60 percent; the outermost powder layer 3 is uniformly distributed on the surface of the screen by a spraying mode and then is adhered to the surface of the screen by vacuum sintering.

The thickness of the framework layer 1 is 1-10mm, so that the filter element has enough strength. The sintered silk screen layer 2 has high porosity, ensures the air permeability of the filter element, provides a surface convenient for powder to adhere to, ensures that the powder can be uniformly distributed on the outer side of the silk screen, and can be fused with the powder layer 3 in a vacuum sintering mode due to the special sintering structural characteristic, so that the adhesion strength of the powder layer is increased, and the powder layer is not easy to fall off; the powder layer 3 is a filter layer, has submicron-grade pore size, ensures the filtering precision, has a compact surface structure, avoids fine particles from permeating the filter layer, and ensures the regeneration effect and the online service life. The thickness of the filter is only 0.2-0.3mm, and the filter does not have too large flow resistance.

Gas or liquid to be filtered containing tiny solid particles passes through the filter element from outside to inside, the solid particles are intercepted on the outer surface of the filter element by the powder layer, fluid enters a downstream flow through the filter element, when the thickness of the filter element on the outer surface of the filter element reaches a certain thickness, a filter cake is taken away in a back flushing or back flushing mode, and the filter element is regenerated.

A mechanical structure of punching skeleton, metal sintered wire mesh and powder spraying; and (4) performing two-time sintering molding process (screen sintering + screen and powder secondary sintering).

In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second", "third", "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby the features defined as "first", "second", "third", "fourth" may explicitly or implicitly include at least one such feature.

In the present invention, unless otherwise explicitly specified or limited, the terms "mounted", "disposed", "connected", "fixed", "screwed" and the like are to be understood broadly, and may be, for example, a fixed connection, a detachable connection, or an integral body; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate medium, and may be used for communicating the inside of two elements or for interacting with each other, unless otherwise specifically defined, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to the specific circumstances.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The novel metal filtering membrane with the asymmetric structure is characterized by comprising a framework layer (1), a wire mesh layer (2) and a powder layer (3), wherein the wire mesh layer (2) is arranged above the framework layer (1), and the powder layer (3) is arranged above the wire mesh layer (2);

the framework layer (1) is a punched pipe, the diameter of a punched hole is 1-5mm, and the thickness of the punched hole is 1-10 mm;

the porosity of the silk screen layer (2) is 50-100 μm, and the porosity of the silk screen layer (2) is 60%;

the thickness of the powder layer (3) is 0.2-0.3 mm.

2. The novel asymmetric structure metal filter membrane of claim 1, wherein: the silk screen layer (2) is made by sintering five layers of silk screens.

3. The novel asymmetric structure metal filter membrane of claim 1, wherein: the powder layer (3) is uniformly distributed on the surface of the silk screen layer (2) in a spraying mode.

4. The novel asymmetric structure metal filter membrane of claim 1, wherein: the silk screen layer (2) is fused with the powder layer (3) in a vacuum sintering mode.