A hollow multi-channel support plate and a membrane element, a membrane stack

Abstract

The utility model belongs to the MBR flat membrane production and manufacturing field, concretely relates to a hollow multi -flow channel support plate and membrane element, membrane stack of flat membrane special, the hollow multi -flow channel support plate includes the upper and lower two layers of perforated plate of corresponding arrangement, a plurality of partition is arranged at intervals between two layers of perforated plate, and the independent flow channel is formed between adjacent partition and perforated plate. The utility model has realized that flat membrane element outflow area effectively expands, membrane element packing density improves greatly, has reduced flat membrane's production cost and operating energy consumption simultaneously.

Description

Technical Field

[0001] This utility model belongs to the field of MBR flat sheet membrane manufacturing, specifically relating to a hollow multi-channel support plate and membrane elements and membrane stacks for flat sheet membranes. Background Technology

[0002] With increasingly stringent wastewater treatment standards and rising demands for resource recovery, membrane bioreactor (MBR) technology has become the mainstream process in wastewater treatment and reuse due to its advantages such as excellent effluent quality and small footprint. Among them, flat-sheet membrane modules have become an important development direction for MBR technology due to their irreplaceable advantages such as strong antifouling resistance, high operational stability, and long lifespan.

[0003] However, the following key bottlenecks still exist in the practical engineering application of flat sheet membrane technology: 1) The small outflow area of ​​the membrane element restricts the improvement of operating flux; 2) The low packing density leads to a large footprint; 3) The high energy consumption of aeration increases the operating cost. These bottlenecks seriously restrict its market promotion and large-scale application. Utility Model Content

[0004] In view of this, the purpose of the present invention is to provide a hollow multi-channel support plate, membrane element, and membrane stack specifically for flat sheet membranes, which can improve flux and reduce cost.

[0005] The technical solution adopted in this invention is as follows: A hollow multi-channel support plate includes two perforated plates arranged on the upper and lower sides, with multiple partitions spaced apart between the two perforated plates, and independent flow channels formed between adjacent partitions and perforated plates.

[0006] The shape of the flow channel cross-section includes, but is not limited to, rectangles, triangles, or regular hexagons.

[0007] The thickness of the partition is 0.1-1.0 mm, and the spacing between adjacent partitions is 1.6-4.0 mm.

[0008] The hollow multi-channel support plate has a thickness of 1.0-5.0 mm, a weight of 100-1000 g / m², and a surface compressive strength of not less than 1 kgf / cm². 2 .

[0009] The perforated plate is uniformly provided with through holes. The thickness of the perforated plate is 0.1-1.0 mm, the diameter of the through holes is 0.2-2.0 mm, and the opening rate is 20-40%.

[0010] The perforated plate and the partition can be formed by one-time extrusion, or the partition can be welded or bonded between the two layers of perforated plate.

[0011] The perforated plate is made of rigid materials, including but not limited to PP, PVC, PET, etc.

[0012] A membrane element comprising a hollow multi-channel support plate, wherein the hollow multi-channel support plate is provided with a membrane core disposed on the outer side of the upper and lower porous plates.

[0013] The perforated plate has a length of 500-1500mm and a width of 100-1000mm.

[0014] The membrane core is an organic separation membrane for MBR wastewater treatment, and the membrane core material includes, but is not limited to, one of PVDF, PTFE or CPVC.

[0015] A membrane pad is provided between the membrane core and the perforated plate. The membrane pad is made of non-woven fabric.

[0016] Furthermore, 5-200 membrane elements are arranged side by side, and each membrane element is sealed and fixed by water collection tanks connected to the flow channel at both ends. In use, the water collection tanks are connected to the water collection pipes for assembly.

[0017] The net spacing between adjacent membrane elements is 0.5-5.0 times the thickness of the membrane element.

[0018] Compared with the prior art, the beneficial technical effects of the present invention are: The hollow multi-channel support plate of this invention can reduce the amount of support material used, and the production cost of the support plate is about 3 yuan / m. 2 The production cost of the membrane is reduced by 90% or more compared to the traditional flat ABS support plate with a thickness of 6-7mm. This reduction in production cost allows for a significant reduction in the thickness of the membrane element.

[0019] The use of hollow multi-channel support plates significantly increases the outflow area of ​​membrane elements, raising it to 1000-2000 mm². 2 / m 2 The membrane is a traditional flat sheet membrane with an outflow area of ​​10-40 mm². 2 / m 2 It is 50-100 times more efficient than traditional flat-sheet membranes; the clean water flux can reach up to 10 m³ / m²·d, which is 5-10 times that of traditional flat-sheet membranes, thus increasing flux and reducing energy consumption.

[0020] The gas-water ratio of the membrane element of this invention can be as low as 3-5, which is 50% or more lower than that of traditional flat sheet membranes, and equal to or even better than that of hollow membranes and traditional processes (AAO, oxidation ditch), greatly reducing the operating energy consumption of flat sheet membranes.

[0021] Membrane stacks made using membrane elements can achieve a significant increase in packing density, breaking through technical and economic bottlenecks and reducing operating energy consumption. Attached Figure Description

[0022] Figure 1This is a schematic cross-sectional view of a hollow multi-channel support plate; Figure 2 This is a front view of the hollow multi-channel support plate; Figure 3 This is a cross-sectional schematic diagram of a membrane element; Figure 4 This is a frontal view of the membrane stack; Figure 5 This is a side view of a membrane stack (10 membrane elements). Detailed Implementation

[0023] The following examples illustrate specific implementations of the present invention. However, these examples are merely for illustrative purposes and do not limit the scope of the invention in any way.

[0024] Example 1: A hollow multi-channel support plate, such as Figure 1 As shown, it includes two perforated plates 5 arranged in a corresponding manner, with multiple partitions 6 spaced apart between the two perforated plates 5. Adjacent partitions 6 and perforated plates 5 form independent flow channels 4, and the flow channels are rectangular in shape.

[0025] The perforated plate 5 has through holes 8 evenly distributed on it. The thickness of the perforated plate 5 is 1.0 mm, the diameter of the through holes is 1.0 mm, and the opening rate is 30%.

[0026] The thickness of partition 6 is 1.0 mm, the spacing between adjacent partitions 6 is 3.0 mm, and the partitions are fixed between the upper and lower perforated plates 5 by welding.

[0027] The thickness of the hollow multi-channel support plate (the distance between the outer surfaces of the two perforated plates) is 4.0 mm.

[0028] The perforated board 5 and the partition 6 are made by one-time extrusion.

[0029] Example 2 A membrane element, such as Figure 3 As shown, the hollow multi-channel support plate 1 of Embodiment 1 includes a membrane core 3 disposed on the outer side of the upper and lower perforated plates 5. The perforated plates 5 are 1000mm long and 800mm wide; the membrane core 3 is made of PVDF. Non-woven fabric membrane pads 2 are respectively disposed between the membrane core 3 and the upper and lower perforated plates 5.

[0030] Example 3 A type of membrane stack, such as Figure 4 , 5As shown, the membrane element of Example 2 is illustrated. Taking 10 membrane elements 9 as an example, the 10 membrane elements 9 are arranged side by side, with the net spacing between adjacent membrane elements 9 being 1 times the thickness of the membrane element 9. Each membrane element 9 has a water collection tank 7 connected to the flow channel at both its upper and lower ends for encapsulation, fixation, cutting, and arrangement to form a membrane stack. When in use, the membrane stack is assembled by connecting the water collection tank and the water collection pipe.

[0031] During use, water flows through the membrane core 3 for filtration, then through the membrane pad 2 and the porous plate 5 before flowing into the channel. The water from each channel continues to flow into the water collection tank 7, and finally enters the water collection pipe for collection.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention, as long as they do not depart from the spirit and scope of the technical solutions of the present invention, should be covered within the scope of the claims of the present invention.

Claims

1. A hollow multi-channel support plate, characterized in that: It includes two perforated plates, one above the other, with multiple partitions spaced between the two perforated plates, and each adjacent partition forming an independent flow channel with respect to the perforated plate.

2. The hollow multi-channel support plate as described in claim 1, characterized in that: The thickness of the partition is 0.1-1.0 mm, and the spacing between adjacent partitions is 1.6-4.0 mm.

3. The hollow multi-channel support plate as described in claim 1 or 2, characterized in that: The thickness of the hollow multi-channel support plate is 1.0-5.0 mm.

4. The hollow multi-channel support plate as described in claim 1 or 2, characterized in that: The perforated plate is uniformly provided with through holes. The thickness of the perforated plate is 0.1-1.0 mm, the diameter of the through holes is 0.2-2.0 mm, and the opening rate is 20-40%.

5. A membrane element, characterized in that, The invention includes the hollow multi-channel support plate as described in claim 1, wherein the hollow multi-channel support plate has a membrane core disposed on the outer side of the upper and lower porous plates.

6. The membrane element as described in claim 5, characterized in that: The perforated plate has a length of 500-1500mm and a width of 100-1000mm.

7. The membrane element as described in claim 5, characterized in that: A membrane pad is provided between the membrane core and the porous plate.

8. A membrane stack, characterized in that: The membrane element as described in claim 5 includes multiple membrane elements arranged side by side, with water collection tanks connected to the flow channel at both the upper and lower ends of each membrane element.

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