CN218422059U

CN218422059U - Sawtooth structure high-performance ceramic filter membrane with inner support

Info

Publication number: CN218422059U
Application number: CN202222693393.1U
Authority: CN
Inventors: 李泉; 马宁; 樊震坤; 张伟; 孟凡朋
Original assignee: Shandong Gui Yuan Membrane Materials Science And Technology Ltd
Current assignee: Shandong Gui Yuan Membrane Materials Science And Technology Ltd
Priority date: 2022-10-13
Filing date: 2022-10-13
Publication date: 2023-02-03
Anticipated expiration: 2032-10-13

Abstract

The utility model relates to a pottery filtration membrane technical field specifically is a zigzag structure high performance pottery filtration membrane with interior support. The high-performance ceramic filtering membrane with the inner support and the zigzag structure comprises a filtering membrane body, wherein a first filtering interface is arranged above the filtering membrane body, a first filtering channel is arranged below the first filtering interface, a channel supporting layer is arranged below the first filtering channel, a second filtering channel is arranged below the channel supporting layer, and a second filtering interface is arranged below the second filtering channel; the first filtering interface adopts a sawtooth-shaped fluctuation structure. The ceramic filtering membrane greatly increases the filtering area, improves the filtering efficiency, improves the flux by 2-4 times and reduces the risk of structural bursting in the repeated backwashing process by the arrangement of the zigzag undulating structure.

Description

Sawtooth structure high-performance ceramic filter membrane with inner support

Technical Field

The utility model relates to a pottery filtration membrane technical field specifically is a zigzag structure high performance pottery filtration membrane with interior support.

Background

In the prior art, ceramic membrane products for water purification or sewage filtration treatment are mainly two types: one is a tubular ceramic membrane, which generally takes material separation as a main part and small-scale water treatment in special environment as an auxiliary part; the other is a flat ceramic membrane which is applied to the treatment of purified water and sewage on a large scale and mainly has the characteristics of large flux, long service life and high strength, but the flat ceramic membrane has the defects of relatively large occupied area, high brittleness and easy burst of back washing.

SUMMERY OF THE UTILITY MODEL

According to the not enough among the prior art above, the utility model aims at providing a zigzag structure high performance ceramic filtration membrane with interior support, through zigzag undulation structure's setting, greatly increased filter area has improved filtration efficiency, and the flux has improved 2-4 times, has reduced the structure risk of bursting of relapseing the backwash in-process.

The utility model discloses an adopt following technical scheme to realize:

the high-performance ceramic filtering membrane with the inner support and the zigzag structure comprises a filtering membrane body, wherein a first filtering interface is arranged above the filtering membrane body, a first filtering channel is arranged below the first filtering interface, a channel supporting layer is arranged below the first filtering channel, a second filtering channel is arranged below the channel supporting layer, and a second filtering interface is arranged below the second filtering channel; the first filtering interface adopts a sawtooth-shaped fluctuation structure.

The first filtering interface adopts a zigzag fluctuating structure, the filtering area of a single element is greatly increased, the inner surface and the outer surface of the filtering membrane body are of a parallel structure, the thickness is uniform and consistent, the shape is a triangular zigzag structure, the sharp part is subjected to fillet treatment, and the valley bottom is subjected to chamfer treatment.

The cross sections of the first filtering channel and the second filtering channel are triangular filtering channels, the triangular angle is equal to the angle corresponding to the shape of the external sawtooth, and the vertical distance from the triangular edge to the external sawtooth edge is equal.

The shapes of the first filtering channel and the second filtering channel are triangular structures consistent with the outer surfaces, and the triangular sides are parallel to the triangular sides on the outer surfaces of the corresponding sides of the original pieces, namely, the whole vertical distances are equal.

In the first filtering channel and the second filtering channel, a reinforcing support layer is arranged between two adjacent triangular filtering channels, the thickness of the reinforcing support layer is 0.2-2mm, and the filtering channels are prevented from deforming in the manufacturing process.

The thickness of the channel supporting layer is 0.5-1mm.

The filtering membrane body is made of one or more materials of alumina, zirconia, titanium oxide, zinc oxide and silicon carbide.

The filtering membrane body is formed by extrusion, the length of the filtering membrane body is 100-1500mm, the width of the filtering membrane body is 100-500mm, the thickness of the filtering membrane body is 3-10mm, the wall thickness of the filtering membrane body is 1-3mm, the side length of a filtering channel is 2-4mm, the extrusion speed is 3m/min, the extrusion pressure is 8MPa, the sintering temperature is 1350 ℃, the average pore diameter of the prepared ceramic membrane support body is 0.5-2 mu m when the heat preservation time is 4 hours, the porosity is 40-45%, the compressive strength is 50MPa, and the pure water flux is 360 kg/piece/hour under the pressure of-0.04 MPa.

When the backwashing pressure passes through the first filtering interface, the pressure is dispersed towards two sides in a radial angle because of the sawtooth structure, and is not integrally vertical to a plane like a flat ceramic membrane, so that the structure of the integral element is subjected to destructive pressure, and the reduction is more than 50%. And because the filtering area of the single-piece element is increased by more than 50 percent, the integral interface greatly increases the dispersion of the backwashing pressure during backwashing.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) By arranging the zigzag undulating structure, the filtering efficiency of the ceramic filtering membrane is greatly improved, and the flux is improved by 2-4 times;

(2) The area of a single product is increased, the efficiency is improved, the purpose of greatly increasing the filling density is achieved, and the occupied area and the space in the application process are greatly reduced;

(3) By the arrangement of the zigzag fluctuating structure, the pressure direction of water pressure during backwashing is changed, and the risk of structural bursting in the repeated backwashing process is greatly reduced;

(4) Compared with a traditional flat ceramic membrane, the high-performance ceramic filtering membrane with the inner support and the sawtooth structure has the advantages of higher efficiency, lower cost, higher reliability and longer service life.

Drawings

FIG. 1 is a schematic structural diagram of a high-performance ceramic filtering membrane with an inner support and a sawtooth structure;

fig. 2 is a transverse cross-sectional view of the present invention;

fig. 3 is a partial longitudinal cross-sectional view of the present invention;

in the figure: 1. a filter membrane body; 2. a first filtering interface; 3. a first filtration channel; 4. a channel support layer; 5. a second filtration channel; 6. a second filtering interface; 7. and reinforcing the support layer.

Detailed Description

In order to make the objects and technical solutions of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings.

Example 1

As shown in fig. 1, the high-performance ceramic filter membrane with the zigzag structure and the inner support comprises a filter membrane body 1, wherein a first filter interface 2 is arranged above the filter membrane body 1, a first filter channel 3 is arranged below the first filter interface 2, a channel support layer 4 is arranged below the first filter channel 3, a second filter channel 5 is arranged below the channel support layer 4, and a second filter interface 6 is arranged below the second filter channel 5; the first filtering interface 2 adopts a zigzag undulating structure. First filtration interface 2 adopts zigzag undulation structure, greatly increases the filter area of single component, and this internal and external surface of filtration membrane is parallel structure, and thickness is even unanimous, and the shape is triangular sawtooth structure, and the point portion carries out radius angle processing, and the valley bottom is the angle of falling flat processing. The sections of the first filtering channel 3 and the second filtering channel 5 are triangular filtering channels, the triangular angle is equal to the angle corresponding to the shape of the external sawtooth, and the vertical distance from the triangular edge to the external sawtooth edge is equal. The shapes of the first filtering channel 3 and the second filtering channel 5 are both triangular structures consistent with the outer surfaces, and the triangular sides are parallel to the triangular sides on the outer surfaces of the corresponding sides of the original pieces, namely the whole vertical distances are equal. In the first filtering channel 3 and the second filtering channel 5, a reinforcing support layer 7 is arranged between two adjacent triangular filtering channels, and the thickness of the reinforcing support layer 7 is 0.2-2mm. The thickness of the channel support layer 4 is 0.5-1mm. The filtering membrane body is made of aluminum oxide, zirconium oxide and titanium oxide in a compounding mode. The filtering membrane body is formed by extrusion, the length of the filtering membrane body is 1000mm, the width of the filtering membrane body is 300mm, the thickness of the filtering membrane body is 8mm, the wall thickness of 10 walls of the filtering membrane body is 2mm, the side length of a filtering channel is 3mm, the extrusion speed is 3m/min, the extrusion pressure is 8MPa, the sintering temperature is 1350 ℃, the average pore diameter of the ceramic membrane support prepared when the heat preservation time is 4 hours is 1 mu m, the porosity is 43%, the compressive strength is 50MPa, and the pure water flux is 360 kg/piece per hour under the pressure of-0.04 MPa.

The high-performance ceramic filter membrane with the zigzag structure and the inner support comprises the following steps in work:

(1) Completely immersing the filtering membrane body 1 in sewage to be filtered, connecting two ends of the filtering membrane body 1 to a self-priming pump through pipelines, and electrifying for filtering; (2) In the filtering process, impurities and fungi in the sewage are blocked by the filtering membrane body 1, and clean water passes through the membrane layer, then is collected into a connected pipeline through the first filtering channel 3 and the second filtering channel 5 inside, and is discharged into a water purifying container; (3) After long-time operation, the pressure of the self-priming pump gradually rises along with the impurity blockage on the surface of the filtering membrane body 1, the flux drops, when-0.06 mpa is reached, the self-priming pump is automatically pressurized and reversely flushed by clean water along the connecting pipeline, the impurity layer blocked by the impurities is flushed, and the filtering flux is recovered.

Claims

1. A high-performance ceramic filtering membrane with an inner support and a zigzag structure is characterized by comprising a filtering membrane body (1), wherein a first filtering interface (2) is arranged above the filtering membrane body (1), a first filtering channel (3) is arranged below the first filtering interface (2), a channel supporting layer (4) is arranged below the first filtering channel (3), a second filtering channel (5) is arranged below the channel supporting layer (4), and a second filtering interface (6) is arranged below the second filtering channel (5);

the first filtering interface (2) adopts a sawtooth-shaped fluctuation structure.

2. The ceramic filter membrane with the zigzag structure and the internal support of claim 1, wherein the cross section of each of the first filter passage (3) and the second filter passage (5) is a triangular filter passage, the triangular angle is equal to the angle corresponding to the shape of the external sawtooth, and the vertical distance from the triangular side to the external sawtooth side is equal.

3. The ceramic filter membrane with a zigzag structure and an internal support according to claim 1, characterized in that a reinforcing support layer (7) is arranged between two adjacent triangular filter channels in the first filter channel (3) and the second filter channel (5), and the thickness of the reinforcing support layer (7) is 0.2-2mm.

4. The ceramic filter membrane with a zigzag structure and internal support according to claim 1, characterized in that the thickness of the channel support layer (4) is 0.5-1mm.

5. The ceramic filter membrane with a zigzag structure and an internal support of claim 1, wherein said filter membrane body (1) has a length of 100-1500mm, a width of 100-500mm and a thickness of 3-10mm.