A surface-ridged ceramic membrane element, assembly and filtration system

Abstract

The application discloses a ceramic membrane assembly with surface protrusions, and belongs to the technical field of ceramic membrane preparation. The ceramic membrane assembly with surface protrusions can improve the packing density of the ceramic membrane and has higher filtration efficiency. The ceramic membrane assembly with surface protrusions comprises a support body, the top and bottom of the support body are each provided with a plurality of protrusions extending along the axial direction, the protrusions on the top of the support body are arranged in a staggered mode with the protrusions on the bottom of the support body, each of the protrusions is provided with a through cavity extending along the axial direction, and the outer surfaces of the support body and the protrusions are each provided with a filter membrane layer. The application further discloses a ceramic membrane assembly with surface protrusions and a filter membrane filtration system thereof. The ceramic membrane assembly and the filter membrane filtration system are used for filtering sewage, and have higher filtration efficiency, and are easy to produce, process and assemble.

Description

Technical Field

[0001] This invention relates to the technical field of ceramic membrane preparation, and more specifically, to a ceramic membrane element with protruding surfaces. The invention also discloses a ceramic membrane assembly with protruding surfaces and a ceramic membrane filtration system including such a ceramic membrane assembly. Background Technology

[0002] Currently, membrane materials are broadly classified into organic and inorganic membranes, with ceramic membranes being the most prevalent among inorganic membranes. Compared to organic membranes, ceramic membranes offer advantages in terms of material and product performance, including higher strength, better chemical stability, a wider operating temperature range, higher filtration flux, and longer service life. However, they also have drawbacks such as lower filtration accuracy, higher production costs, and smaller filtration area per unit space (lower membrane packing density). Lower filtration accuracy is primarily addressed by improving the type of raw materials, increasing the precision of raw material processing, and innovating membrane coating technologies and equipment. Higher production costs are mainly overcome by reducing raw material costs and energy consumption costs, and improving production efficiency. The smaller filtration area per unit space (lower membrane packing density) is primarily addressed by adjusting the structure and shape of the membrane elements and designing the membrane module structure.

[0003] Currently, ceramic membrane elements come in various structures and shapes, including single-channel tubular, multi-channel tubular, hollow flat-plate, rotary, and combined honeycomb types. The form of the membrane module is related to the structure and shape of the membrane element, resulting in a wide variety of forms. For example, hollow flat-plate ceramic membranes can be vertical or horizontal. The surface of commonly used hollow flat-plate ceramic membrane elements is generally planar, which limits the increase in the filtration area (membrane packing density) per unit space, thus restricting the improvement of filtration efficiency. Therefore, there is an urgent need to invent a ceramic membrane element to solve these problems. Summary of the Invention

[0004] The purpose of this invention is to provide a ceramic membrane assembly with protruding surfaces, which can increase the packing density of the ceramic membrane and achieve higher filtration efficiency.

[0005] A second objective of this invention is to provide a ceramic membrane module with a raised surface, which provides higher efficiency for wastewater filtration and is also easier to manufacture, process, and assemble. A third objective of this invention is to provide a ceramic membrane filtration system with a raised surface.

[0006] The first technical solution of the present invention is as follows:

[0007] A ceramic membrane assembly with protruding surfaces includes a support body, the top and bottom of which are provided with a plurality of protrusions extending along their axial direction, the protrusions at the top of the support body being staggered from the protrusions at the bottom of the support body, each of the protrusions having a conductive cavity extending along its axial direction, and the outer surfaces of the support body and the protrusions being provided with a filter membrane layer.

[0008] Furthermore, each of the protrusions has the same cross-sectional shape, and is a rectangle or trapezoid with an arc-shaped transition at the outer angle α. Each of the protrusions is connected to the support body through an arc-shaped transition β.

[0009] Furthermore, the angular range of the outer angle α and the arc angle β of each of the aforementioned protrusions is 70 to 130°.

[0010] Furthermore, the cross-sectional shape of the conductive cavity is rectangular or trapezoidal, and the inner corners of the conductive cavity are all rounded.

[0011] Furthermore, the cross-sectional shape of the conductive cavity is circular.

[0012] The second technical solution of the present invention is as follows:

[0013] A surface-protruding ceramic membrane assembly includes a pair of port seals and at least one surface-protruding ceramic membrane element. The surface-protruding ceramic membrane elements are stacked from top to bottom. The inner end of each port seal is provided with an encapsulation groove. Both ends of the surface-protruding ceramic membrane element are respectively encapsulated in the encapsulation grooves of the pair of port seals. A port shaping component is provided between each port seal and the surface-protruding ceramic membrane element. The length and width of the port shaping component are the same as the length and width dimensions of the cross-section of the surface-protruding ceramic membrane element. The port shaping component is provided with multiple through holes. The positions of the multiple through holes correspond to the positions of multiple through cavities in the surface-protruding ceramic membrane element. One of the port seals is provided with an outlet. All through cavities of the surface-protruding ceramic membrane element are connected to the outlet.

[0014] Furthermore, the cross-sectional shape of the through hole of the port shaping component is adapted to the cross-sectional shape of the through cavity.

[0015] Furthermore, the port shaping element is bonded to the surface-protruding ceramic film element.

[0016] The third technical solution of the present invention is as follows:

[0017] A ceramic membrane filtration system with raised surfaces includes a housing and at least one of the aforementioned ceramic membrane components with raised surfaces, the ceramic membrane components being disposed within the housing. The housing has a wastewater outlet and a clean water outlet, the clean water outlet being connected to the outlet of each ceramic membrane component via a pipe, and the wastewater outlet being connected to the interior of the housing.

[0018] Furthermore, the number of ceramic membrane components with surface protrusions is 1 to 4, and the ceramic membrane components with surface protrusions are stacked from top to bottom.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] 1. A ceramic membrane element with surface protrusions according to the present invention comprises a support body with multiple axially extending protrusions at both the top and bottom of the support body. The protrusions at the top of the support body are staggered with those at the bottom of the support body. Each protrusion contains a conductive cavity extending axially. A filter membrane layer is provided on the outer surface of both the support body and the protrusions. The multiple protrusions at both the top and bottom of the support body increase the surface area of ​​the filter membrane, significantly improving the membrane packing density of the ceramic membrane element and resulting in higher filtration efficiency.

[0021] 2. A ceramic membrane assembly with raised surfaces according to the present invention includes at least one ceramic membrane element with raised surfaces, comprising a pair of port seals, wherein the ceramic membrane elements are stacked from top to bottom with very small gaps between them, the inner end of the port seals is provided with a sealing groove, and the two ends of the ceramic membrane elements are respectively sealed in the sealing grooves of the pair of port seals, and a port shaping component is provided between each port seal and the ceramic membrane element with raised surfaces. The length and width of the port shaping component are the same as the length and width of the cross-section of the ceramic membrane element with raised surfaces, and the port shaping component is provided with multiple through holes, the positions of which correspond to the positions of multiple through cavities in the ceramic membrane element with raised surfaces. One of the port seals is provided with an outlet, and the through cavities of the ceramic membrane elements with raised surfaces are all connected to the outlet. Each ceramic membrane element with a raised surface is sealed in the sealing groove of the port seal after being bonded to both ends with a port shaping component. This eliminates the influence of the raised ceramic membrane element on the sealing, simplifies the structure of the port seal, effectively reduces the amount of adhesive used, simplifies the sealing operation, and ensures the sealing effect of the ceramic membrane assembly. It also effectively prevents the glue from flowing into the outlet of the port seal when a large amount of adhesive is used, thus preventing the outlet from becoming blocked and reducing the outlet conductivity. This significantly improves production efficiency and is also easier to manufacture, process, and assemble. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0023] Figure 1 This is a schematic diagram of the structure of the ceramic film element with surface protrusions according to the present invention;

[0024] Figure 2 This is a front view of the ceramic film element with surface protrusions according to the present invention;

[0025] Figure 3 This is a schematic diagram of the structure of the ceramic film assembly with surface protrusions according to the present invention;

[0026] Figure 4 yes Figure 3 Schematic diagram of the cross-section of section AA;

[0027] Figure 5 yes Figure 3 Schematic diagram of the cross-section of the middle BB section;

[0028] Figure 6 This is a schematic diagram of the port shaping component in the ceramic membrane assembly with surface protrusions of the present invention;

[0029] Figure 7 yes Figure 3 A schematic diagram of the structure of a ceramic membrane element in a ceramic membrane assembly with surface protrusions;

[0030] Figure 8 This is a schematic diagram of the structure of the ceramic membrane filtration system with surface protrusions according to the present invention.

[0031] Wherein: 1-Support; 2-Protrusion; 3-Conducting cavity; 4-Filter membrane layer; 5-Port seal; 6-Encapsulation groove; 7-Port shaping component; 8-Conducting hole; 9-Outlet; 10-Outer shell; 11-Sewage outlet; 12-Clean water outlet; 13-Pump. Detailed Implementation

[0032] The technical solution of the present invention will be further described in detail below with reference to specific embodiments, but this does not constitute any limitation on the present invention.

[0033] Reference Figure 1 and 2As shown, a ceramic membrane element with surface protrusions according to the present invention includes a support body 1. The support body 1 has multiple protrusions 2 extending axially at both its top and bottom. The protrusions 2 at the top of the support body 1 are staggered with those at the bottom. Each protrusion 2 has a conductive cavity 3 extending axially within it. A filter membrane layer 4 is provided on the outer surface of both the support body 1 and the protrusions 2. The multiple protrusions 2 at both the top and bottom of the support body 1 increase the surface area of ​​the filter membrane compared to the two-plane structure of traditional flat ceramic membranes, thus significantly increasing the membrane packing density of the ceramic membrane element and resulting in higher filtration efficiency.

[0034] Furthermore, each of the protrusions 2 has the same cross-sectional shape, and is a rectangle or trapezoid with an arc transition at the outer angle α. Each of the protrusions 2 is connected to the support body 1 through an arc transition β. The center positions of the outer angle α and the arc angle β are opposite. This can reduce the generation of defects such as cracks during production and improve the product qualification rate.

[0035] Furthermore, the angles of the outer angle α and the arc angle β of each protrusion 2 range from 70° to 130°. More preferably, the angles of the outer angle α and the arc angle β of each protrusion 2 range from 80° to 110°, and are commonly equal to 90°. Variations in the angles of the outer angle α and the arc angle β of each protrusion 2 affect the filtration area of ​​the ceramic membrane element and the degree of fouling during operation. Larger angles of the outer angle α and the arc angle β reduce the filtration area but lessen fouling; smaller angles of the outer angle α and the arc angle β increase the filtration area but exacerbate fouling. Therefore, the angles of the outer angle α and the arc angle β need to be determined according to the usage conditions, and generally, both the outer angle α and the arc angle β are chosen to be equal to 90°.

[0036] Furthermore, the cross-sectional shape of the conductive cavity 3 is rectangular or trapezoidal, and the interior corners of the conductive cavity 3 are all rounded. Alternatively, the cross-sectional shape of the conductive cavity 3 may be circular. This reduces the occurrence of defects such as cracks during production and improves the product qualification rate.

[0037] Furthermore, in the aforementioned ceramic membrane element with surface protrusions, the distance (thickness) between each side of the central hollow channel in each rectangular or trapezoidal shape and the corresponding membrane surface is the same or similar. This ensures that the filtration resistance in all directions of the ceramic membrane element is similar, reducing localized fouling and improving filtration efficiency.

[0038] Reference Figures 3 to 7As shown, a ceramic membrane assembly with surface protrusions according to the present invention includes a pair of port seals 5 and at least one of the surface protrusion ceramic membrane elements. The surface protrusion ceramic membrane elements are stacked from top to bottom. When there are multiple surface protrusion ceramic membrane elements, they are arranged side by side in the same direction and position, with very small gaps between the planes of two adjacent ceramic membrane elements. This can greatly increase the packing density of the ceramic membrane, increase the filtration flux of the ceramic membrane assembly, and improve the filtration efficiency. The inner end of the port seal 5 is provided with an encapsulation groove 6. Both ends of the surface-protruding ceramic membrane element are respectively encapsulated in the encapsulation grooves 6 of a pair of port seals 5. A port shaping component 7 is provided between each port seal 5 and the surface-protruding ceramic membrane element. The length and width of the port shaping component 7 are the same as the length and width of the cross-section of the surface-protruding ceramic membrane element. The port shaping component 7 is provided with multiple through holes 8, the positions of which correspond to the positions of multiple through cavities 3 in the surface-protruding ceramic membrane element. One of the port seals 5 is provided with a water outlet 9, and all through cavities 3 of the surface-protruding ceramic membrane element communicate with the water outlet 9. The water outlet 9 can be located on the four sides of the port seal 5 or on the bottom surface of the port seal 5. Each ceramic membrane element with a raised surface is sealed in the encapsulation groove 6 of the port seal 5 after being bonded to both ends with a port shaping component 7. This eliminates the influence of the raised ceramic membrane element on the encapsulation, simplifies the structure of the port encapsulation component 5, effectively reduces the amount of adhesive used, simplifies the encapsulation operation, ensures the sealing effect of the ceramic membrane assembly, and effectively prevents glue from flowing into the outlet 9 of the port encapsulation component 5 when a large amount of adhesive is used, thus preventing the outlet 9 from becoming blocked and reducing the conductivity of the outlet 9. This significantly improves production efficiency and is also easy to manufacture, process, and assemble.

[0039] Furthermore, the cross-sectional shape of the through hole 8 of the port shaping component 7 is adapted to the cross-sectional shape of the through cavity 3, so that the end face of the port shaping component 7 corresponding to the outer edge of the through hole 3 fits better with the end face of the ceramic film element with the surface protrusion corresponding to the outer edge of each through cavity 4, so as to ensure the encapsulation effect.

[0040] Furthermore, the port shaping component 7 is bonded to the surface-protruding ceramic film element, so that the outer end of the surface-protruding ceramic film element can better fit the existing port package.

[0041] Reference Figure 8As shown, a ceramic membrane filtration system with surface protrusions according to the present invention includes a housing 10 and at least one ceramic membrane assembly with surface protrusions. The ceramic membrane assembly with surface protrusions is disposed inside the housing 10. The housing 10 is provided with a wastewater outlet 11 and a clean water outlet 12. The clean water outlet 12 is connected to the outlet 9 of each ceramic membrane assembly through a pipe. The wastewater outlet 11 is connected to the interior of the housing 10, thus enabling the ceramic membrane assembly to form a membrane treatment system. Furthermore, a water pump 13 is externally connected to the clean water outlet 12. The system can adopt a suction-type negative pressure filtration mode or a pressure cross-flow filtration mode.

[0042] Furthermore, the number of ceramic membrane components with surface protrusions is 1 to 4, and the ceramic membrane components with surface protrusions are stacked from top to bottom.

[0043] Example 1

[0044] The first step is to use a ceramic membrane manufacturing process to produce a membrane such as... Figure 1 and Figure 2 As shown in b, a ceramic membrane element with a raised surface includes a support body 1, which is 820 mm long, 240 mm wide, and 9 mm thick. Twenty rectangular protrusions 2 are provided on the top and bottom of the support body 1. The protrusion 2 has a face width of 5.0 mm and a bottom width of 5.0 mm. The angle between the outer angle α and the arc angle β of the protrusion 2 is 110°. Each protrusion 2 has a conductive cavity 3 with a square cross-section extending along its axial direction. The side length of the conductive cavity 3 is 4.0 mm. The surface of the ceramic membrane element with a raised surface and the right angles in the conductive cavity 3 are appropriately rounded.

[0045] The second step involves using an organic board to process two port shaping components 7, each 240mm long, 9mm wide, and 2mm thick. The length and width of the port shaping component 7 are the same as the length and width of the cross-section of the surface-protruding ceramic membrane element. Each component contains 40 through holes 8, the positions of which correspond to the positions of multiple through cavities 3 within the surface-protruding ceramic membrane element. Furthermore, the cross-sectional shape of the through holes 8 is adapted to the cross-sectional shape of the through cavities 3. Figure 3 As shown.

[0046] The third step is to attach the two port shaping pieces 7 to the two ends of the ceramic membrane element with protrusions on the surface, respectively. The through holes 8 on the port shaping pieces 7 are connected to the through cavities 3 of the ceramic membrane element with protrusions on the surface.

[0047] The fourth step involves injection molding two port seals 5 using organic material PC-1100R. One of these seals has an outlet 9, while the other does not. The overall lengths of the port seal 5 without and with an outlet 9 are 250mm and 270mm, respectively, with an outer width of 15mm and a height of 20mm.

[0048] Fifth step: First, insert one end of the ceramic membrane element with protruding surface of the two-end adhesive port shaping part 7 prepared in the third step into the encapsulation groove 6 of one of the port seals 5. Fill the gap between the ceramic membrane element with protruding surface and the encapsulation groove 6 of the port seal 5 with epoxy resin. After the adhesive has cured, insert the other end of the ceramic membrane element with protruding surface into the encapsulation groove 6 of the other port seal 5. Fill the gap between the ceramic membrane element with protruding surface and the encapsulation groove 6 of the port seal 5 with epoxy resin. After the adhesive has cured, the ceramic membrane assembly with protruding surface is obtained.

[0049] Example 2

[0050] The first step is to use a ceramic membrane manufacturing process to produce a membrane such as... Figure 1 and Figure 2 A ceramic membrane element with a raised surface, as shown in figure a, includes a support body 1 with a length of 620 mm, a width of 200 mm, and a thickness of 8 mm. Twenty rectangular protrusions 2 are provided on the top and bottom of the support body 1. The protrusion 2 has a face width of 5.0 mm and a bottom width of 5.0 mm. The angles of the outer angle α and the arc angle β of the protrusion 2 are 110°. Each protrusion 2 has a rectangular cross-sectional cavity 3 extending along its axial direction. The side lengths of the cavity 3 are 4.0 mm and 3.0 mm, respectively. The surface of the ceramic membrane element and the right angles in the cavity 3 are appropriately rounded.

[0051] The second step involves using an organic board to process two port shaping components 7, each 200mm long, 8mm wide, and 2mm thick. The length and width of the port shaping component 7 are the same as the length and width of the cross-section of the surface-protruding ceramic membrane element. Each component contains 40 through holes 8, the positions of which correspond to the positions of multiple through cavities 3 within the surface-protruding ceramic membrane element. Furthermore, the cross-sectional shape of the through holes 8 is adapted to the cross-sectional shape of the through cavities 3. Figure 3 As shown.

[0052] The third step is to attach the two port shaping pieces 7 to the two ends of the ceramic membrane element with protrusions on the surface, respectively. The through holes 8 on the port shaping pieces 7 are connected to the through cavities 3 of the ceramic membrane element with protrusions on the surface.

[0053] The fourth step involves injection molding two port seals 5 using organic material PC-1100R. One of these seals has an outlet 9, while the other does not. The overall lengths of the port seal 5 with and without an outlet 9 are 210mm and 230mm respectively, with an outer width of 30mm. This allows for the side-by-side placement of three ceramic membrane elements with protruding surfaces. The height of the port seal 5 is 20mm.

[0054] Fifth step: First, insert one end of the three ceramic film elements with protruding surfaces (the two ends of the port shaping parts 7 prepared in step three) into the encapsulation groove 6 of one of the port sealing parts 5, such as... Figure 7 As shown, epoxy resin is filled between the protruding ceramic membrane element and the encapsulation groove 6 of the port seal 5, as well as the gaps between the three port shaping pieces 7. After the adhesive cures, the other ends of the three protruding ceramic membrane elements are inserted into the encapsulation groove 6 of another port seal 5. Epoxy resin is then filled between the protruding ceramic membrane element and the encapsulation groove 6 of the port seal 5, as well as the gaps between the three port shaping pieces 7. After the adhesive cures, a protruding ceramic membrane assembly is obtained. Figure 3 As shown.

[0055] Example 3

[0056] The first step is to use a ceramic membrane manufacturing process to produce a membrane such as... Figure 1 and Figure 2 As shown in Figure c, a ceramic membrane element with a raised surface includes a support body 1, which is 520 mm long, 180 mm wide, and 9 mm thick. Fifteen rectangular protrusions 2 are provided on the top and bottom of the support body 1. The protrusion 2 has a face width of 6.0 mm and a bottom width of 6.0 mm. The angle between the outer angle α and the arc angle β of the protrusion 2 is 80°. Each protrusion 2 has a conductive cavity 3 with a square cross-section extending along its axial direction. The side length of the conductive cavity 3 is 4.0 mm. The surface of the ceramic membrane element with a raised surface and the right angles in the conductive cavity 3 are appropriately rounded.

[0057] The second step involves using an organic board to process two port shaping components 7, each 180mm long, 9mm wide, and 2mm thick. The length and width of the port shaping component 7 are the same as the length and width of the cross-section of the surface-protruding ceramic membrane element. Each component contains 30 through holes 8, the positions of which correspond to the positions of multiple through cavities 3 within the surface-protruding ceramic membrane element. Furthermore, the cross-sectional shape of the through holes 8 is adapted to the cross-sectional shape of the through cavities 3. Figure 3 As shown.

[0058] The third step is to attach the two port shaping pieces 7 to the two ends of the ceramic membrane element with protrusions on the surface, respectively. The through holes 8 on the port shaping pieces 7 are connected to the through cavities 3 of the ceramic membrane element with protrusions on the surface.

[0059] The fourth step involves injection molding four port seals 5 using organic material PC-1100R. Two of these seals have outlets 9 on their bottom surfaces, while the other two do not. Both the port seals 5 with and without outlets 9 have an overall length of 200mm and an outer width of 105mm, allowing for the side-by-side placement of 10 ceramic membrane elements with protruding surfaces. The height of the port seals 5 with outlets 9 is 45mm, while the height of the port seals 5 without outlets 9 is 25mm.

[0060] Fifth step: First, insert one end of each of the 10 ceramic membrane elements with protruding surfaces (the two ends of the port shaping component 7 prepared in step three) into the encapsulation groove 6 of one of the port seals 5 that does not have an outlet 9, such as... Figure 7 As shown, epoxy resin is filled between the protruding ceramic membrane element and the encapsulation groove 6 of the port seal 5, as well as the gaps between the 10 port shaping pieces 7. After the adhesive cures, the other end of the 10 protruding ceramic membrane elements is inserted into the encapsulation groove 6 of a port seal 5 with an outlet 9. Epoxy resin is then filled between the protruding ceramic membrane element and the encapsulation groove 6 of the port seal 5, as well as the gaps between the 10 port shaping pieces 7. After the adhesive cures, a protruding ceramic membrane assembly is obtained. Figure 3 As shown. Repeat the steps to prepare a second identical ceramic membrane module.

[0061] Step 6: The outer shell 10 is manufactured using 304 stainless steel. (Example:...) Figure 8 As shown, the outer casing is a square tube, with one end closed and the other end initially open, to be closed after the ceramic membrane modules are installed. At each end of the outer casing 10 is a wastewater outlet 11 communicating with the inner cavity, and at one end of the outer casing 10 is a clean water outlet 12 connected to the outlets 9 of the two ceramic membrane modules via a pipe. The inner tube of the outer casing 10 is 650mm long and has an inner side length of 250mm.

[0062] Step 7: Place the two ceramic membrane modules with protruding surfaces prepared in step 5 into the outer shell prepared in step 6 and fix them in place. Connect the outlets 9 of the two ceramic membrane modules to a water collection pipe, which leads out from the clean water inlet 12 on the outer shell 10. Seal the water collection pipe and the outer shell 10 with a sealing element. Then close one open end of the outer shell 10 to form a ceramic membrane filtration system. This system can adopt a suction negative pressure filtration mode or a pressure cross-flow filtration mode.

[0063] Comparative test

[0064] A conventional flat-panel ceramic membrane assembly with raised surfaces is used, with a thickness of 6.0 mm and two flat filter surfaces. In this conventional flat-panel ceramic membrane assembly, the installation spacing (gap) between adjacent ceramic membranes is 10 mm, serving as a reference filter membrane assembly. A ceramic membrane assembly with raised surfaces from Example 2 is used as a comparative filter membrane assembly. Based on its structure, this ceramic membrane element has protrusions 2 at both the top and bottom. The filtration area of ​​each raised ceramic membrane element is nearly twice that of a flat ceramic membrane element of the same size. Furthermore, the spacing between the raised ceramic membrane elements in the present invention is very small (e.g., ...). Figure 7 As shown, if a traditional flat-panel ceramic membrane module contains 5 flat-panel ceramic membranes, the required width is 5×6+4×10=70mm, while the ceramic membrane module of the present invention, which contains 8 surface-protruding ceramic membrane elements, only requires a width of 8×8=64mm (the extra 6mm is considered as a small gap between each ceramic membrane module). Five traditional flat-panel ceramic membrane modules with surface protrusions have 10 filter surfaces (2 surfaces per module), while the surface-protruding ceramic membrane elements of the present invention have twice the filter surfaces of the traditional flat-panel ceramic membrane module (the top and bottom protrusions 2 each add at least one surface, equivalent to 4 surfaces per module). In addition, each surface-protruding ceramic membrane module uses 3 more surface-protruding ceramic membrane elements, meaning the surface-protruding ceramic membrane module of the present invention has 8 × 4 surfaces / module = 32 filter surfaces. Under the same membrane module space size, it has 22 more surfaces than the traditional flat-panel ceramic membrane module, meaning the filter area is more than 3 times that of the traditional ceramic membrane module. Therefore, the ceramic membrane element and ceramic membrane assembly with surface protrusions of the present invention can significantly improve the packing density of the ceramic membrane, thereby making its filtration efficiency higher.

[0065] The above description is only a preferred embodiment of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A ceramic film element with surface protrusions, characterized in that, Includes a support body (1), the top and bottom of the support body (1) are provided with a plurality of protrusions (2) extending along its axial direction, the protrusions (2) located at the top of the support body (1) and the protrusions (2) located at the bottom of the support body (1) are staggered, each of the protrusions (2) is provided with a conductive cavity (3) extending along its axial direction, and the outer surfaces of the support body (1) and the protrusions (2) are provided with a filter membrane layer (4); Each of the protrusions (2) has the same cross-sectional shape and is a rectangle or trapezoid with an arc transition at the outer angle α. Each of the protrusions (2) is connected to the support (1) by an arc transition β.

2. The ceramic film element with surface protrusions according to claim 1, characterized in that, The angular range of the outer angle α and the arc angle β of each of the protrusions (2) is 70 to 130°.

3. A ceramic film element with surface protrusions according to claim 1, characterized in that, The cross-sectional shape of the conductive cavity (3) is rectangular or trapezoidal, and the inner corners of the conductive cavity (3) are all rounded.

4. A ceramic film element with surface protrusions according to claim 1, characterized in that, The cross-sectional shape of the conductive cavity (3) is circular.

5. A ceramic membrane assembly with surface protrusions, characterized in that, The device includes a pair of port seals (5) and at least one surface-protruding ceramic membrane element as described in any one of claims 1-4. The surface-protruding ceramic membrane elements are stacked from top to bottom. The inner end of the port seal (5) is provided with an encapsulation groove (6). The two ends of the surface-protruding ceramic membrane element are respectively encapsulated in the encapsulation groove (6) of the pair of port seals (5). A port shaping component (7) is provided between each port seal (5) and the surface-protruding ceramic membrane element. The length and width of the port shaping component (7) are the same as the length and width dimensions of the cross section of the surface-protruding ceramic membrane element. The port shaping component (7) is provided with a plurality of through holes (8). The positions of the plurality of through holes (8) correspond to the positions of a plurality of through cavities (3) in the surface-protruding ceramic membrane element. One of the port seals (5) is provided with an outlet (9). The through cavities (3) of the surface-protruding ceramic membrane element are all connected to the outlet (9).

6. A ceramic membrane assembly with surface protrusions according to claim 5, characterized in that, The cross-sectional shape of the through hole (8) of the port shaping component (7) is adapted to the cross-sectional shape of the through cavity (3).

7. A ceramic membrane assembly with surface protrusions according to claim 5 or 6, characterized in that, The port shaping component (7) is bonded to the ceramic film element with a protruding surface.

8. A ceramic membrane filtration system with surface protrusions, characterized in that, The device includes a housing (10) and at least one ceramic membrane assembly with a surface protrusion as described in any one of claims 5-7, the ceramic membrane assembly with the surface protrusion disposed inside the housing (10), the housing (10) having a wastewater outlet (11) and a clean water outlet (12), the clean water outlet (12) being connected to the outlet (9) of each ceramic membrane assembly via a pipe, and the wastewater outlet (11) being connected to the interior of the housing (10).

9. A ceramic membrane filtration system with surface protrusions according to claim 8, characterized in that, The number of ceramic membrane components with surface protrusions is 1 to 4, and the ceramic membrane components with surface protrusions are stacked from top to bottom.

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