Stacked catalytic ceramic membrane assembly and water treatment system

Abstract

A stacked catalytic ceramic membrane assembly relates to the technical field of water treatment and comprises a base and catalytic ceramic membrane units stacked on the base, each catalytic ceramic membrane is fixed in the frame in a manner that the short edges are vertically arranged and the long edges are transversely arranged, the two short edges of each catalytic ceramic membrane are respectively provided with a water outlet, one water outlet is arranged at the upper end of the short edge, the other water outlet is arranged at the lower end of the short edge, the frame is provided with four second upright posts, and the four second upright posts are arranged on the frame. The four second stand columns are correspondingly aligned with the four first stand columns in the vertical direction, and each second stand column is provided with a vertically-through positioning hole allowing the corresponding positioning rod to penetrate through. And the four positioning rods penetrate through the corresponding positioning holes to stack and fix the plurality of catalytic ceramic membrane units on the base. The device has the advantages that the number of units can be freely selected for stacking, and water collection and backwashing are balanced.

Description

Technical Field

[0001] This utility model relates to a water filtration and purification device and a water treatment system constructed by the device in the field of water treatment technology. Specifically, it relates to a stacked catalytic ceramic membrane module and a water treatment system. Background Technology

[0002] Water treatment systems typically consist of multiple process tanks that sequentially treat wastewater. Wastewater passes through flocculation tanks, sedimentation tanks, and filtration tanks to obtain purified water. Submersible membrane modules are installed in the filtration tanks; early water treatment systems used organic membrane modules. Compared to organic membranes, currently used ceramic membranes offer advantages such as high mechanical strength, high pressure resistance, good wear and erosion resistance, narrow pore size distribution, good separation performance, large permeate flow, repeated washing and regeneration, strong chemical stability, high temperature and corrosion resistance, and long service life. Therefore, many water treatment systems currently using submersible organic membrane modules need to be replaced in situ with catalytic ceramic membrane modules.

[0003] Patent document CN206343080U discloses a flat-plate ceramic membrane module, including a base with two frames mounted on it. Flat-plate ceramic membranes are installed within each frame. Water outlets are distributed at the top of the flat-plate ceramic membranes, and each outlet is connected to a water outlet pipe via a guide pipe located between the two frames. The base is an integral base with an aeration device inside. The water outlet pipe is a separate type. An ultraviolet baffle is installed at the top of each frame, and lifting lugs are located at both ends of the top of the frames, with corresponding special lifting devices. Membrane baffles are installed on both sides of the flat-plate ceramic membrane, and these baffles are separate types. This design gives the flat-plate ceramic membrane module advantages for integration and industrialization.

[0004] However, CN206343080U still has the following shortcomings. First, when using it to replace existing organic membrane modules in situ, it often results in a size mismatch with the filter tank. Usually, a relatively small ceramic membrane module is immersed in the filter tank, and the low packing density prevents the ceramic membrane module from achieving the optimal water treatment capacity of the in-situ filter tank. Second, in its flat-plate ceramic membrane module, the ceramic membrane is immersed in the filter tank with its long side vertical and short side horizontal, and the outlet of the ceramic membrane is located at the top. This results in a relatively large water flow rate near the outlet and a relatively small water flow rate far from the outlet, causing uneven overall fouling of each membrane. There are also too many dead zones during backwashing, which affects the lifespan of the ceramic membrane. In addition, due to the excessive aspect ratio of each membrane, the membranes often break under their own weight and the scouring force of the water flow during operation. Summary of the Invention

[0005] To solve the above-mentioned technical problems, there is an urgent need to provide an improved ceramic membrane module, a water treatment system constructed therefrom, or a method for in-situ replacement of membrane modules in existing water treatment systems.

[0006] The main objective of this invention is to provide a stacked catalytic ceramic membrane module.

[0007] Another objective of this invention is to provide a water treatment system.

[0008] To achieve the above-mentioned main objectives, the present invention provides a stacked catalytic ceramic membrane assembly comprising a base and catalytic ceramic membrane units mounted on the base; the base has a cylindrical structure with open top and bottom, including four parallel and spaced first columns and a first enclosure connecting the four first columns, a base frame fixed to the bottom of the first enclosure, and four positioning rods detachably fixed to the top of the four first columns; the catalytic ceramic membrane unit includes a frame and multiple catalytic ceramic membranes fixed within the frame, each catalytic ceramic membrane being fixed within the frame with its short side vertical and its long side horizontal, and each of the two short sides of each catalytic ceramic membrane having an outlet, one outlet being located at the upper end of the short side and the other outlet being located at the lower end of the short side; the frame has four second columns, which are vertically aligned with the four first columns, and each second column has a positioning hole that passes through vertically for the positioning rods to pass through; the four positioning rods pass through the corresponding positioning holes to stack and fix the multiple catalytic ceramic membrane units on the base.

[0009] As can be seen from the above scheme, multiple catalytic ceramic membrane units are fixed on the base in a stacked manner. The number of catalytic ceramic membrane units that are most suitable for the depth of the in-situ filtration tank can be selected to achieve the optimal packing density. Setting the outlet of each catalytic ceramic membrane to two, one above the other, in a diagonal arrangement, can maximize the improvement of the effluent uniformity and backwash uniformity of each catalytic ceramic membrane.

[0010] A further solution involves fixing supporting ribs at both ends of the short side of the catalytic ceramic membrane to the frame, and also fixing at least one energy-dissipating rib on the lower long side of the catalytic ceramic membrane. The advantage of this solution is that it not only securely fixes the catalytic ceramic membrane within the frame, but also provides support from the energy-dissipating ribs, resulting in a relatively uniform distribution of gravity along the long side and reducing membrane breakage due to weight.

[0011] A further improvement is that at least one anti-vibration rib is fixed to the frame along the upper long side of the catalytic ceramic membrane. The advantage of this design is that the anti-vibration rib, together with the energy dissipation rib and the support rib, can significantly improve the stability of each catalytic ceramic membrane during operation, preventing membrane damage due to vibration.

[0012] Another further solution is to install one or two pairs of second enclosure plates around the four second columns; the second enclosure plates are vertically aligned with the first enclosure plates. This solution can balance the contradiction between aeration gas utilization rate and water treatment capacity. When the packing density is high, a pair of second enclosure plates can be used to relatively increase the influent flow rate of the stacked catalytic ceramic membrane module. When the packing density is low, the lower catalytic ceramic membrane units can use two pairs of second enclosure plates while the upper catalytic ceramic membrane units can use a pair of second enclosure plates. Alternatively, they can be used alternately, depending on the specific situation, to seek the optimal balance point of the above contradiction.

[0013] To achieve another objective of this utility model, the provided water treatment system includes a filtration tank in which a stacked catalytic ceramic membrane assembly, as described in any of the embodiments, is installed. Attached Figure Description

[0014] Figure 1 This is a front view of the first embodiment of the stacked catalytic ceramic membrane module;

[0015] Figure 2 This is a perspective view of the first embodiment of the stacked catalytic ceramic membrane module;

[0016] Figure 3 This is a perspective view of the base in the first embodiment of the stacked catalytic ceramic membrane module;

[0017] Figure 4 This is a perspective view of a catalytic ceramic membrane unit in the first embodiment of the stacked catalytic ceramic membrane module;

[0018] Figure 5 yes Figure 4 The three-dimensional frame diagram in the image;

[0019] Figure 6 It is a three-dimensional diagram reflecting the structure of each rib in the frame;

[0020] Figure 7 yes Figure 6 A magnified view of part A;

[0021] Figure 8 yes Figure 6 A magnified view of part B.

[0022] The following is a detailed description of the embodiments of this utility model and their accompanying drawings. Detailed Implementation

[0023] Since this invention mainly improves existing ceramic membrane modules, the following only describes in detail the differences between the stacked catalytic ceramic membrane module embodiment and the prior art. The main structure of the water treatment system can be implemented using existing technology, only by installing the stacked catalytic ceramic membrane module of this invention in the filter tank of the water treatment system, or by replacing the existing membrane module in the water treatment system with the stacked catalytic ceramic membrane module of this invention. Therefore, the following will not describe the embodiment of the water treatment system separately.

[0024] First embodiment of stacked catalytic ceramic membrane module

[0025] See Figure 1 , Figure 1 It is a stacked catalytic ceramic membrane assembly 100 consisting of a base 1 and three catalytic ceramic membrane units 2 installed in a stacked configuration.

[0026] See Figure 2 and combined Figure 1 , Figure 2 This is a perspective view of the stacked catalytic ceramic membrane module 100. An aeration pipe is fixed inside the base 1, with the lower end of the ozone pipe 4 connected to it and the upper end used to connect to an ozone generator. Each catalytic ceramic membrane unit 2 contains multiple catalytic ceramic membranes 21. Each catalytic ceramic membrane 21 is fixed within the frame with its short side vertical and its long side horizontal. Each catalytic ceramic membrane has an outlet on each of its two short sides, one at the upper end and the other at the lower end. Each catalytic ceramic membrane unit 2 also has an outlet pipe 3 fixed to the frame, which connects to the two outlets 31 of each catalytic ceramic membrane 21 within its unit. The open end 32 of the outlet pipe 3 connects to the main outlet pipe. Four positioning rods 5 pass through positioning holes on each catalytic ceramic membrane unit 2, stacking and fixing the three catalytic ceramic membrane units 2 onto the base 1.

[0027] See Figure 3 , Figure 3 This is a three-dimensional structural view of the base 1. The base 1 has four parallel and spaced first columns 12, four first enclosure plates 13 connecting the four columns 12, and a base frame 14 formed by longitudinal and transverse beams fixed to the bottom of the first enclosure plates 13, thus forming a cylindrical structure with open top and bottom. An aeration pipe 41 for communicating with the ozone pipe 4 is also fixed on the base frame 14. The advantage of the cylindrical structure is that it allows the ozone microbubbles aerated by the aeration pipe 41 to rise as high as possible into the catalytic ceramic membrane 21 in the catalytic ceramic membrane unit 2, rather than escaping inappropriately from the side. Four positioning rods 5 are detachably fixed to the top of the four first columns 12.

[0028] See Figure 4 , Figure 4This is a perspective view of a catalytic ceramic membrane unit 2. The catalytic ceramic membrane unit 2 has four second columns 22 vertically aligned with the aforementioned four first columns 12. Each second column 22 has a positioning hole 25 that extends vertically through the positioning rod 5 for passage. (See also...) Figure 2 Four positioning rods 5 pass through the corresponding positioning holes 25, allowing the three catalytic ceramic membrane units 2 to be stacked and fixed on the base 1. To enhance the reliability of the connection between the catalytic ceramic membrane units 2, eight bolts 26 are used to connect two adjacent catalytic ceramic membrane units 2. The base 1 and adjacent catalytic ceramic membrane units 2 are also connected in the same way to enhance the reliability of the connection. The bolts 26 are located at the upper and lower end faces of the second column 22. The catalytic ceramic membrane unit 2 has a frame 24, in which multiple catalytic ceramic membranes 21 are fixed. A pair of second enclosure plates 23 are arranged around the four second columns 22. The two second enclosure plates 23 are arranged parallel to the catalytic ceramic membranes 21. When the catalytic ceramic membrane unit 2 is stacked with the base 1, the second enclosure plate 23 is aligned vertically with the first enclosure plate 13 below it, which can be said to be in a coplanar state.

[0029] See Figure 5 , Figure 5 It is a three-dimensional diagram reflecting the structure of frame 24 in catalytic ceramic membrane unit 2, and Figure 5 The diagram also shows a supporting stiffener 27 and an energy-dissipating stiffener 28 installed on the frame 24. The frame 24 consists of four second columns 22, four crossbeams 241, two longitudinal beams 242, and five reinforcing beams 243 arranged in a specific configuration. Figure 5 The support ribs 27 and energy dissipation ribs 28 are fixedly connected and fixed to the surface of the corresponding rib beams 243 facing the catalytic ceramic membrane 21.

[0030] See Figure 6 , Figure 6 This is a schematic diagram reflecting the relationship between the ribs in the frame 24 and the catalytic ceramic membrane 21, as well as the installation state of each catalytic ceramic membrane 21 in the frame. Each rectangular catalytic ceramic membrane 21 is fixed in the frame 24 with the short side 212 vertical and the long side 211 horizontal. A water collection plate is provided on the short side 212 of each catalytic ceramic membrane 21, and a water outlet 213 is fixed at the end of the water collection plate. The water outlet 213 on the right side is located at the upper end of the short side 212, and the water outlet 213 on the left side is located at the lower end of the short side 212.

[0031] See Figure 7 , Figure 7 yes Figure 6A partial enlarged view of section A. The reinforcing beam 243 serves as a structural component of the frame 22 and also bears the load for the various rubber reinforcing bars. The supporting reinforcing bars 27 are fixed to the reinforcing beam 243 at the four corners of the catalytic ceramic membrane 21. They are long and have slots 271 for wrapping the water collection plate. The outer contour of the water collection plate is matched. The slots 271 are arranged laterally along the supporting reinforcing bars 27. The number of slots 271 on each supporting reinforcing bar 27 is the same as the number of catalytic ceramic membranes 21 carried in the frame 22.

[0032] See Figure 8 , Figure 8 yes Figure 6 In the enlarged view of section B, the energy-dissipating rib 28 is fixed on the rib beam 243 that supports the long side of the catalytic ceramic membrane 21. It is also long and has slots 281 of the same thickness as the sheet for wrapping the catalytic ceramic membrane 21. The slots 281 are arranged transversely along the energy-dissipating rib 28. The number of slots 281 on each energy-dissipating rib 28 is the same as the number of catalytic ceramic membranes 21 carried in the frame 22.

[0033] Second embodiment of stacked catalytic ceramic membrane module

[0034] The difference between this example and the first embodiment is that four catalytic ceramic membrane units 2 are stacked together. The two catalytic ceramic membrane units 2 located at the bottom have two pairs of second enclosure plates 23, that is, the frame 24 is provided with second enclosure plates 23 on all four sides. The catalytic ceramic membrane unit 2 located at the top has a pair of second enclosure plates 23, while the catalytic ceramic membrane unit 2 located at the topmost does not have a second enclosure plate 23.

[0035] Third embodiment of stacked catalytic ceramic membrane module

[0036] The difference between this example and the first embodiment is that the catalytic ceramic membrane 21 has a larger aspect ratio, so three alternating energy dissipation ribs 27 are provided. In addition, three anti-vibration ribs are symmetrically provided on the top of the frame 22 above and below the energy dissipation ribs 27. The structure and fixing method of the anti-vibration ribs are exactly the same as those of the aforementioned energy dissipation ribs 27.

Claims

1. A stacked catalytic ceramic membrane module, comprising a base and catalytic ceramic membrane units installed on the base; characterized in that: the base has a cylindrical structure with open top and bottom, comprising four first vertical columns parallel to each other and spaced apart, a first surrounding plate connecting the four first vertical columns, a chassis fixed at the bottom of the first surrounding plate, and four positioning rods detachably fixed at the top ends of the four first vertical columns; the catalytic ceramic membrane unit comprises a frame and a plurality of catalytic ceramic membranes fixed in the frame, each of the catalytic ceramic membranes is fixed in the frame with the short side vertically and the long side horizontally, and each of the catalytic ceramic membranes is provided with one water outlet on each of the two short sides, one of which is arranged at the upper end of the short side and the other is arranged at the lower end of the short side, the frame has four second vertical columns, the four second vertical columns are vertically aligned with the four first vertical columns respectively, and each of the second vertical columns is provided with a positioning hole through which the positioning rod passes; the four positioning rods pass through the corresponding positioning holes to stack and fix the plurality of catalytic ceramic membrane units on the base.

2. The stacked catalytic ceramic membrane module according to claim 1, characterized in that: the frame is fixed with support ribs at both ends of the short side of the catalytic ceramic membrane, and is further fixed with at least one energy dissipation rib on the lower long side of the catalytic ceramic membrane.

3. The stacked catalytic ceramic membrane module according to claim 2, characterized in that: the frame is further fixed with at least one anti-vibration rib on the upper long side of the catalytic ceramic membrane.

4. The stacked catalytic ceramic membrane module according to claim 1, characterized in that: one or two pairs of second surrounding plates are arranged around the four second vertical columns; the second surrounding plates are vertically aligned with the first surrounding plate.

5. A water treatment system, comprising a filter tank; characterized in that: the filter tank is installed with the stacked catalytic ceramic membrane module according to any one of claims 1 to 4.

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