Ceramic membrane separation device

Abstract

The utility model belongs to the technical field of ceramic membrane separation and filtration, and provides a ceramic membrane separation device which comprises a fixed frame, at least one ceramic assembly and at least one air floatation pipe are arranged on the fixed frame, the ceramic assembly comprises two ceramic membranes which are arranged in parallel and are of plate-shaped structures, and fixed plates are connected to the peripheries of the two ceramic membranes; the fixed plate and the two ceramic membranes surround to form a closed collecting cavity, the outer side of the fixed plate is connected with a liquid outlet pipe, the liquid outlet pipe is communicated with the collecting cavity, the air floating pipe is arranged at the lower ends of the ceramic membranes and extends in the length direction of the ceramic membranes, at least one aeration hole is formed in the side, facing the ceramic membranes, of the air floating pipe, and the air floating pipe is used for being connected with a dissolved air pump. Compared with the prior art, the air flotation filter has the advantages that part of oil drops attached to the ceramic membrane can be removed in real time through the air flotation effect, the frequency of frequent cleaning of the filter due to blockage is reduced, the generation and treatment cost of cleaning waste liquid is reduced, and the overall operation cost is reduced.

Description

Technical Field

[0001] The present application belongs to the field of ceramic membrane separation technology, and specifically relates to a ceramic membrane separation device. Background Art

[0002] The broad family of ceramic membranes primarily utilizes inorganic ceramic materials such as alumina, zirconia, titanium oxide, and silicon oxide in varying sizes as a support, which are then surface-coated and fired at high temperatures. Silicon carbide ceramic membranes, a rapidly developing inorganic membrane material in recent years, offer numerous advantages, including high porosity, high flux, high-temperature resistance, high chemical stability, hydrophilicity and oleophobicity, high mechanical strength, and excellent wear resistance. They hold promising prospects for oil-water separation and water purification.

[0003] During use, especially in oil-water separation, filters inevitably become clogged over time, resulting in reduced filter efficiency, increased resistance, and impacted filter operation. Furthermore, any clogged ceramic membrane filters require cleaning with alkaline or acidic solutions, generating a significant amount of wastewater that requires disposal, impacting filter efficiency and increasing cleaning costs. Utility Model Content

[0004] The purpose of this application is to provide a ceramic membrane separation device that can remove some oil droplets attached to the ceramic membrane in real time through flotation, reducing the number of times the filter needs to be cleaned frequently due to blockage, thereby reducing the generation and treatment costs of cleaning waste liquid and reducing overall operating costs.

[0005] The technical solution adopted by the present application to solve the above-mentioned technical problems is: a ceramic membrane separation device is proposed, comprising: a fixed frame, on which at least one ceramic component and at least one flotation tube are provided, the ceramic component comprises two parallel plate-shaped ceramic membranes, the two ceramic membranes are connected with fixed plates on all four sides, the fixed plates and the two ceramic membranes are surrounded to form a closed collection chamber, the outer side of the fixed plate is connected with a liquid outlet pipe, the liquid outlet pipe is connected to the collection chamber, the flotation tube is arranged at the lower end of the ceramic membrane, the flotation tube extends along the length direction of the ceramic membrane, the flotation tube is provided with at least one aeration hole on the side facing the ceramic membrane, and the flotation tube is used to be connected to a dissolved air pump.

[0006] Through the above technical features, when in use, when a liquid containing an oil-water mixture passes through the ceramic component, the ceramic membrane uses its high porosity, high flux and hydrophilic and oleophobic properties to allow water molecules to pass through the membrane pores while the oil droplets are intercepted, thereby achieving oil-water separation. At the same time, the flotation tube arranged at the lower end of the ceramic membrane releases tiny bubbles into the liquid through the aeration holes. These bubbles adhere to the oil droplets, forming bubble-oil droplet complexes. Due to the buoyancy of the bubbles, these complexes float to the surface of the liquid, further promoting the effective separation of oil and water. And by assisting the filtration of the ceramic membrane with flotation, it can effectively reduce the deposition of oil droplets on the surface of the ceramic membrane, reduce membrane pollution, thereby improving the filtration efficiency and extending the service life of the ceramic membrane. Moreover, because the flotation effect can remove some of the oil droplets attached to the ceramic membrane in real time, the number of times the filter needs to be frequently cleaned due to blockage is reduced, thereby reducing the generation and treatment costs of cleaning waste liquid and reducing overall operating costs.

[0007] Preferably, the fixed frame is provided with a plurality of ceramic components arranged at intervals, and the plurality of ceramic components are arranged in parallel.

[0008] Through these technical features, several ceramic assemblies are arranged in parallel on a fixed frame. When a liquid containing an oil-water mixture flows through, each ceramic assembly independently performs a filtering operation, increasing the filtration area and improving overall filtration efficiency. Furthermore, the spacing between the ceramic assemblies helps optimize the flow distribution of the liquid during the filtration process. This spacing ensures that the liquid maintains a relatively uniform velocity and pressure as it flows through each ceramic assembly, thereby improving filtration effectiveness and reducing the risk of localized blockage.

[0009] Preferably, the upper and lower ends of the inner side of the fixed frame are provided with clamping grooves extending along the length direction of the ceramic membrane, and the upper and lower ends of the fixing plates on both sides of the ceramic component along the length direction are clamped with the clamping grooves.

[0010] Thanks to these technical features, the upper and lower snap-in slots on the inner side of the mounting frame provide stable support and positioning for the ceramic assembly. The mounting plates on either side of the ceramic assembly mate with the snap-in slots, allowing the ceramic assembly to be securely mounted to the mounting frame with a simple snap-in action. To replace or maintain the ceramic assembly, simply remove the mounting plate by gently pulling it out of the slots. Conversely, reinstall the mounting plate by aligning it with the slots and snapping it in.

[0011] Preferably, baffles are provided on both sides of the fixed frame along the length direction, and the two baffles respectively abut against the two ends of the plurality of ceramic components along the length direction.

[0012] The above-mentioned technical features provide a limiting and fixing function for the baffles. They abut against both ends of the ceramic assembly along its length, preventing displacement or shaking during filtration and ensuring that the ceramic assembly is stably fixed within the fixing frame. This prevents the ends of the ceramic assembly from sliding out of the snap-fit ​​groove.

[0013] Preferably, the fixed frame is connected to a first manifold at one end of the liquid outlet pipe, the liquid outlet pipes are all connected to the first manifold, and the first manifold is provided with a liquid outlet.

[0014] Through the above-mentioned technical features, the first manifold serves as a connecting hub between the liquid outlet pipes, collecting and distributing the liquid. Filtered liquid from each ceramic component flows through the liquid outlet pipes into the first manifold, where it is then collected and discharged uniformly through the liquid outlet. The first manifold also helps to balance pressure differences between the various liquid outlet pipes. During the filtration process, factors such as performance differences between ceramic components and uneven liquid flow rates can lead to different pressures within each liquid outlet pipe. The first manifold can balance these pressure differences to a certain extent, ensuring the stable operation of the entire filtration system.

[0015] Preferably, the fixed frame is connected to a support frame on one side of the liquid outlet pipe, and the first manifold is connected to the support frame.

[0016] Through the above-mentioned technical features, the support frame primarily functions to support and secure the first manifold. As the first manifold is a key component that connects multiple outlet pipes and collects liquid, its stability and safety are crucial to the entire filtration system. By being securely connected to the fixed frame, the support frame provides a solid foundation for the first manifold, preventing it from shifting or tilting during operation.

[0017] Preferably, the flotation tube is arranged at the lower end of the fixed frame, and the end of the fixed frame away from the liquid outlet pipe is connected to a second manifold, one end of the flotation tube is connected to the second manifold, and the second manifold is connected to the container pump.

[0018] Through these technical features, during the flotation process, a container pump delivers gas through pipes to the flotation tubes, where it forms tiny bubbles. These bubbles are then released into the liquid to be treated, combining with impurities such as suspended matter and particulate matter, forming air-laden floccules with a lower specific gravity than water. Because these air-laden floccules are lighter than water, they float to the liquid surface, achieving solid-liquid separation. A dissolved air pump supplies air to each dry flotation tube in the device through a second manifold, reducing the complexity of the piping layout and improving the compactness of the equipment.

[0019] Preferably, a fixing ring is connected to the lower side of one end of the fixing frame away from the second manifold, and one end of the flotation tube is inserted into the fixing ring.

[0020] Through the above technical features, the fixing ring is connected to the lower side of the fixing frame, providing a stable and firm support point for fixing one end of the flotation tube, thereby ensuring the stability and safety of the flotation tube during operation.

[0021] In summary, this application has the following beneficial effects:

[0022] (1) The present application can remove some oil droplets attached to the ceramic membrane in real time through flotation, reducing the number of times the filter needs to be cleaned frequently due to blockage, thereby reducing the generation and treatment costs of cleaning waste liquid and reducing overall operating costs;

[0023] (2) The demulsification ceramic membrane of the present application has a demulsification effect on the oil droplets in the oil-water emulsion through its special surface properties or membrane pore structure. While demulsifying, the ceramic membrane uses its high porosity and high flux characteristics to allow water molecules to pass through the membrane pores, while macromolecules such as oil droplets and suspended matter are trapped on the membrane surface or in the membrane pores, further improving the efficiency of oil-water separation;

[0024] (3) In this application, the ceramic components are firmly supported and positioned by the close fit between the snap-in groove and the fixing plate, thereby enhancing the structural stability of the entire filtration system and helping to reduce equipment damage and performance degradation caused by vibration or impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application Figure 1 ;

[0026] Figure 2 A schematic structural diagram of a ceramic component according to an embodiment of the present application;

[0027] Figure 3 This is a schematic diagram of the overall structure of an embodiment of this application Figure 2 ;

[0028] Figure 4 This is a schematic structural diagram of an air flotation tube according to an embodiment of the present application.

[0029] In the figure, 1. fixed frame; 11. snap-in groove; 12. baffle; 13. first manifold; 131. liquid outlet; 14. support frame; 15. fixing ring; 2. ceramic component; 21. ceramic membrane; 22. fixing plate; 23. collecting chamber; 24. liquid outlet pipe; 3. flotation tube; 31. aeration hole; 32. second manifold. DETAILED DESCRIPTION

[0030] The following are specific embodiments of the present application and, in conjunction with the accompanying drawings, further describe the technical solution of the present application, but the present application is not limited to these embodiments.

[0031] like Figure 1 As shown, the present application discloses a ceramic membrane separation device, comprising: a rectangular fixed frame 1, wherein the fixed frame 1 has a plurality of evenly spaced snap-in grooves 11 extending along the length direction on the inner sides of the upper and lower ends on both sides along the width direction, and both ends of the snap-in grooves 11 pass through the fixed frame 1.

[0032] like Figure 1 、 Figure 2 As shown, the corresponding upper and lower snap-in grooves 11 are snap-fitted with ceramic components 2. The ceramic components 2 include two parallel plate-shaped ceramic membranes 21. The two ceramic membranes 21 are surrounded by fixed plates 22. The fixed plates 22 and the two ceramic membranes 21 form a closed collection chamber 23. The upper and lower ends of the fixed plates 22 on both sides of the length of the ceramic components 2 are snap-fitted with the snap-in grooves 11. Baffles 12 are provided on both sides of the fixed frame 1 along the length direction. The two baffles 12 respectively abut against the ends of the ceramic components 2 along the length direction. The baffles 12 limit the ceramic components 2 in the snap-in grooves 11 to prevent the ceramic components 2 from sliding out along the snap-in grooves 11.

[0033] A liquid outlet pipe 24 is connected to the outside of the fixed plate 22 and communicates with the collection chamber 23. Each liquid outlet pipe 24 is connected to the first manifold 13 at one end away from the ceramic assembly 2. The fixed frame 1 is connected to a support frame 14 on one side of the liquid outlet pipe 24. The first manifold 13 is connected to the support frame 14 and has a liquid outlet 131.

[0034] like Figure 3 、 Figure 4 As shown, a number of evenly spaced flotation tubes 3 are connected to the bottom of the fixed frame 1, and the flotation tubes 3 extend along the length direction of the ceramic membrane 21 assembly. A number of evenly spaced aeration holes 31 are provided on the side of the flotation tubes 3 facing the ceramic membrane 21. The end of the fixed frame 1 away from the liquid outlet pipe 24 is connected to a second manifold 32, and one end of each flotation tube 3 is connected to the second manifold 32, and the second manifold 32 is connected to the container pump.

[0035] A fixing ring 15 is connected to the lower side of one end of the fixing frame 1 away from the second manifold 32 , and one end of the air flotation tube 3 is inserted into the fixing ring 15 .

[0036] Working principle: When in use, the ceramic membrane 21 separation device is placed in the solution to be treated, and the periphery of the ceramic component 2 in the device can be in contact with the solution.

[0037] When a liquid containing an oil-water mixture passes through ceramic assembly 2, ceramic membrane 21, leveraging its high porosity and high flux, allows small droplets to permeate through the membrane pores. The surface of ceramic membrane 21 is coated with a hydrophilic / oleophobic / oleophilic / hydrophobic coating, allowing either the water or oil droplets to permeate while the other is retained.

[0038] At the same time, the container pump delivers gas through a pipeline to the flotation tube 3, where it forms tiny bubbles. These bubbles are then released into the liquid to be treated, combining with impurities such as suspended matter and particulate matter in the liquid to form air-carrying floccules with a specific gravity less than that of water. Since these air-carrying floccules have a specific gravity less than that of water, they float to the surface of the liquid, further promoting the effective separation of oil and water. Furthermore, flotation assists the filtration of the ceramic membrane 21, effectively reducing the deposition of oil droplets on the surface of the ceramic membrane 21 and alleviating membrane fouling, thereby improving filtration efficiency and extending the service life of the ceramic membrane 21. Furthermore, because flotation can remove some oil droplets adhering to the ceramic membrane 21 in real time, the frequent cleaning required due to filter blockage is reduced, thereby reducing the generation and treatment costs of cleaning waste liquid and lowering overall operating costs.

[0039] The specific embodiments described herein are merely examples for illustrating the present application. Those skilled in the art may make various modifications or additions to the specific embodiments described herein or replace them with similar methods without departing from the scope defined in the present application.

Claims

1. A ceramic membrane separation device, comprising: A fixed frame (1), characterized in that at least one ceramic component (2) and at least one flotation tube (3) are provided on the fixed frame (1), the ceramic component (2) comprises two parallel plate-shaped ceramic membranes (21), the two ceramic membranes (21) are connected with a fixed plate (22) around them, the fixed plate (22) and the two ceramic membranes (21) surround each other to form a closed collection chamber (23), the outer side of the fixed plate (22) is connected with a liquid outlet pipe (24), the liquid outlet pipe (24) is communicated with the collection chamber (23), the flotation tube (3) is provided at the lower end of the ceramic membrane (21), the flotation tube (3) extends along the length direction of the ceramic membrane (21), the flotation tube (3) is provided with at least one aeration hole (31) on the side facing the ceramic membrane (21), and the flotation tube (3) is used to be connected to an air dissolving pump.

2. A ceramic membrane separation device according to claim 1, characterized in that: The fixed frame (1) is provided with a plurality of ceramic components (2) arranged at intervals, and the plurality of ceramic components (2) are arranged in parallel.

3. A ceramic membrane separation device according to claim 2, characterized in that: The upper and lower ends of the inner side of the fixed frame (1) are both provided with a clamping groove (11) extending along the length direction of the ceramic membrane (21), and the upper and lower ends of the fixing plates (22) on both sides of the ceramic component (2) along the length direction are clamped with the clamping groove (11).

4. A ceramic membrane separation device according to claim 3, characterized in that: Baffles (12) are provided on both sides of the fixed frame (1) along the length direction, and the two baffles (12) respectively abut against the two ends of the plurality of ceramic components (2) along the length direction.

5. A ceramic membrane separation device according to claim 4, characterized in that: The fixed frame (1) is connected to a first manifold (13) at one end of the liquid outlet pipe (24), and the liquid outlet pipes (24) are all connected to the first manifold (13). The first manifold (13) is provided with a liquid outlet (131).

6. A ceramic membrane separation device according to claim 5, characterized in that: The fixed frame (1) is located on one side of the liquid outlet pipe (24) and is connected to a support frame (14), and the first pipe manifold (13) is connected to the support frame (14).

7. The ceramic membrane separation device according to claim 4, characterized in that: The flotation tube (3) is arranged at the lower end of the fixed frame (1); one end of the fixed frame (1) away from the liquid outlet pipe (24) is connected to a second manifold (32); one end of the flotation tube (3) is connected to the second manifold (32); and the second manifold (32) is connected to a container pump.

8. The ceramic membrane separation device according to claim 7, characterized in that: A fixing ring (15) is connected to the lower side of one end of the fixing frame (1) away from the second pipe manifold (32), and one end of the air flotation tube (3) is inserted into the fixing ring (15).

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