Filtering membrane device and filtering system

Abstract

The utility model provides a filter membrane device and a filter system, which are used for filtering pollutant particles in liquid to be filtered. The filtering membrane device comprises a filtering assembly. The filtering assembly comprises a plurality of filtering units which are sequentially connected to the liquid collecting pipe in series, each filtering unit comprises a filtering membrane and a separation ring, and the separation ring clamps one filtering membrane to form the filtering unit, so that the filtering membranes are not connected with one another; a separating ring is arranged on the liquid collecting pipe, a filtering piece is arranged on the separating ring, the filtering piece can play a secondary filtering role, when a certain filtering membrane is damaged, the filtering piece can filter out pollution particles in the liquid to be filtered, external particles are prevented from entering the liquid collecting pipe to pollute the filtered liquid, and meanwhile when the filtering device is shut down and operates again, the filtering piece can filter the liquid to be filtered out. Pollution particles in the liquid collecting pipe can be prevented from being recharged into the undamaged filtering membrane; according to the filtering membrane device, the filtering piece is arranged on the separating ring, so that the water yield and the water production quality of the filtering membrane device can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a filter membrane device and a filtration system. Background Art

[0002] The existing filter membrane device mainly consists of components such as a filter membrane (MBR membrane), a separating ring, a collecting water pipe, etc. Its core structure is the filter membrane and the separating ring. The core structure composition is: two separating rings clamp a membrane. After several such membranes are connected in series, the central collecting water pipe passes through them. Through the action of negative pressure suction, external sewage enters the central collecting water pipe through the filter membrane. The separating ring plays a role in sealing and separating each membrane. During the filtration operation, the external sewage flows to the collecting water pipe after being filtered by the filter membrane, thus realizing the entire filtration process.

[0003] However, in the structure of the existing filter membrane device, once one or several filter membranes are damaged, at this time, the external sewage or the liquid to be filtered will enter the collecting water pipe through the damaged filter membrane. The operation mode of the membrane during the sewage filtration process is intermittent. When the filter membrane device is in standby or shutdown operation, the external sewage or the liquid to be filtered will backflow into the undamaged membranes in the collecting water pipe. In this way, the undamaged membranes will be contaminated, and over time, the entire series-connected membranes will be contaminated, and the external sewage will also enter the collecting water pipe, contaminating the filtered water in the collecting water pipe, thereby affecting the water production capacity and water production quality. Summary of the Utility Model

[0004] The utility model aims to solve the technical problem that when the filter membrane of the existing filter membrane device is damaged, the external sewage or the liquid to be filtered will enter the collecting water pipe through the damaged filter membrane, contaminating the filtered water in the collecting water pipe. The purpose of the utility model is to provide a filter membrane device and a filtration system.

[0005] In the first aspect, the utility model provides a filter membrane device for filtering contaminated particulate matters in a liquid to be filtered. The filter membrane device includes:

[0006] A filter assembly, including a plurality of filter units connected in series in sequence. Each filter unit has a through hole and a filter membrane. The distance between the filter membranes on adjacent two filter units is less than the diameter of the contaminated particulate matter. A filtrate channel is formed on the filter unit. The through holes of the plurality of filter units are communicated with each other to form a liquid collecting channel, and the filtrate channel is communicated with the liquid collecting channel.

[0007] In a preferred example, each filter unit further includes:

[0008] A separating ring, on which the filtrate channel is formed. The outer wall of the separating ring is provided with the filter membrane. The inner walls of the plurality of filter units are communicated with each other to form the liquid collecting channel;

[0009] A filter element is disposed in the filtrate channel.

[0010] The outer wall of the partition ring is provided with the filter membrane and the filtrate channel is formed. The beneficial effect is that the liquid to be filtered can directly enter the filtrate channel for secondary filtration after being initially filtered by the filter membrane.

[0011] The filter element is disposed in the filtrate channel. The beneficial effect is that after the liquid to be filtered is filtered by the filter membrane, it is re-filtered by the filter element in the filtrate channel, forming a secondary filtration protection function; when a certain filter membrane is damaged, it can also prevent the sewage from directly entering the liquid collection channel without filtration and polluting the filtered liquid.

[0012] In a preferred example, the partition ring includes a first sub-partition ring and a second sub-partition ring. A filter membrane is clamped between the first sub-partition ring and the second sub-partition ring to form the filtering unit. The filter membrane has a mounting hole, and the partition ring passes through the mounting hole. A plurality of the filtering units communicate the through holes of the partition ring with each other to form the liquid collection channel.

[0013] A filter membrane is clamped between the first sub-partition ring and the second sub-partition ring to form the filtering unit. The beneficial effect is that there is a distance between each filter membrane, which can separate each filter membrane. At the same time, because the filter membrane has a mounting hole, the partition ring can also play a sealing role.

[0014] In a preferred example, the filter membrane device further includes:

[0015] A liquid collection assembly, the liquid collection assembly includes a liquid collection pipe, the liquid collection pipe passes through the liquid collection channel, and the liquid collection pipe communicates with the liquid collection channel.

[0016] In a preferred example, the liquid collection pipe has a liquid outlet, and the liquid outlet is located at one end of the liquid collection pipe;

[0017] The pipe wall of the liquid collection pipe is provided with liquid inlet holes, and the liquid collection pipe communicates with the liquid collection channel through the liquid inlet holes.

[0018] The pipe wall of the liquid collection pipe is provided with liquid inlet holes. The beneficial effect is that after the liquid to be filtered is filtered by a plurality of the filtrate channels, it can enter the liquid collection pipe from the plurality of liquid inlet holes in the liquid collection channel and be discharged from the liquid outlet in the liquid collection pipe.

[0019] In a preferred example, the partition ring has a fixing portion, the fixing portion is located in the through hole of the partition ring, and the fixing portion abuts against the liquid collection pipe for fixing the liquid collection pipe in the liquid collection channel and forming a liquid collection channel between the through hole of the partition ring and the liquid collection pipe.

[0020] In a preferred example, the filter membrane device further includes:

[0021] A fastening assembly, provided at both ends of the filter assembly, for fastening a plurality of the filter units.

[0022] In a preferred example, the fastening assembly includes:

[0023] A first fastener, provided at one end of the filter assembly away from the liquid outlet;

[0024] A second fastener, provided at one end of the filter assembly close to the liquid outlet, and the first fastener and the second fastener are mutually pressed and matched to fasten a plurality of the filter units.

[0025] In a preferred example, the liquid collecting assembly further includes:

[0026] A negative pressure device, provided at the liquid outlet, for generating negative pressure in the liquid collecting pipe so that the filtered liquid is discharged from the liquid outlet.

[0027] The negative pressure device is provided at the liquid outlet, and its beneficial effect is that: negative pressure is generated in the liquid collecting pipe, the efficiency of the liquid to be filtered entering the liquid collecting pipe is accelerated, and the water production of the filter membrane device is improved.

[0028] In a second aspect, the present utility model provides a filtering system, and the filtering system includes the above-mentioned filter membrane device.

[0029] The beneficial effect of the present utility model is that:

[0030] (1) In the present utility model, a filter element is arranged on the partition ring. The liquid filtered by the filter membrane enters the liquid collecting channel after being secondarily filtered by the filter element. When the filter membrane is damaged, the pollution particles in the liquid to be filtered will be filtered by the filter element and will not enter the liquid collecting channel, thereby preventing the pollution particles of the liquid to be filtered from polluting the filtered liquid.

[0031] (2) In the present utility model, a filter element is arranged on the partition ring. When the filter membrane device is in standby or shutdown operation, the pollution particles in the external sewage or the liquid to be filtered will be blocked by the filter element. Therefore, the liquid to be filtered will not backflow to the undamaged membrane, and further the undamaged membrane will not be polluted. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is the assembly effect diagram of the filter membrane device provided by the embodiment of the present utility model;

[0033] Figure 2 is the elevation view of the filter unit provided by the embodiment of the present utility model;

[0034] Figure 3 The effect diagram of the separation ring of the filtration unit provided by the present utility model;

[0035] Figure 4 is Figure 2 the sectional view along D-D in

[0036] Figure 5 is Figure 3 the enlarged view of part A in

[0037] Figure 6 The schematic diagram of the liquid collecting pipe of the embodiment provided by the present utility model.

[0038] Reference numerals in the drawings:

[0039] 11. Filtration unit; 12. Filtrate channel; 13. Liquid collecting channel; 112. Filter membrane; 113. Separation ring; 1131. Fixing part; 1132. Filtering part; 1133. Micropores; 1134. Circular through hole; 1135. First sub-separation ring; 1136. Second sub-separation ring; 1137. Inner wall; 1138. Outer wall; 21. Liquid collecting pipe; 211. Liquid inlet hole; 31. First fastener; 32. Second fastener; Detailed implementation manners

[0040] To make the objectives, technical solutions and advantages of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model. Unless otherwise defined, the technical terms or scientific terms used herein shall have the ordinary meanings understood by those of ordinary skill in the art to which the present utility model belongs. The words such as "including" used herein mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. The "connection" described herein can be a direct connection or an indirect connection, that is, a connection through an intermediate.

[0041] In view of the problems existing in the prior art, the embodiments of the present utility model provide a filter membrane device for filtering contaminated particulate matters in a liquid. Refer to Figure 1 and Figure 2, the filter membrane device includes a filter assembly, the filter assembly includes a plurality of filter units 11 connected in series in sequence, the filter unit 11 has a through hole and a filter membrane 112, the distance between the filter membranes 112 on two adjacent filter units 11 is less than the diameter of the polluted particulate matter, a filtrate channel 12 is formed on the filter unit 11, and the through holes of the plurality of filter units 11 are connected in series in sequence so that the through holes communicate with each other to form a liquid collection channel 13, and the filtrate channel 12 communicates with the liquid collection channel 13.

[0042] In this embodiment, the distance between the filter membranes 112 on two adjacent filter units 11 is less than the diameter of the polluted particulate matter to filter out the polluted particulate matter in the sewage that is larger than the distance between the filter membranes 112. When filtering the sewage, the filter membrane 112 first filters the sewage, and the water generated by passing through the filter membrane 112 enters the filtrate channel 12 and is filtered again in the filtrate channel 12 and then enters the liquid collection channel 13. Through such a design, when a certain filter membrane 112 is damaged and cannot filter the sewage, the polluted particles in the sewage will be filtered in the filtrate channel 12 and will not enter the liquid collection channel 13, thereby preventing the polluted particles in the sewage from contaminating the filtered liquid after filtration.

[0043] In some embodiments, referring to Figure 3 , Figure 4 and Figure 5 , the filter unit 11 further includes a partition ring 113, the partition ring 113 is provided with the filtrate channel 12, the outer wall 1138 of the partition ring 113 is provided with the filter membrane 112, and the inner walls 1137 of the plurality of filter units 11 are connected in series in sequence so that the inner walls 1137 communicate with each other to form the liquid collection channel 13; a filter element 1132 is arranged in the filtrate channel 12.

[0044] In this embodiment, referring to Figure 5 , the partition ring 113 is a ring-shaped structure with a through hole, the partition ring has an inner wall 1137 and an outer wall 1138, and a circular through hole 1134 is formed in the extending direction of the outer wall 1138 towards the inner wall 1137, and the circular through hole 1134 constitutes the filtrate channel 12 of the partition ring 113.

[0045] In some specific embodiments, the filtration accuracy of the filtration membrane 112 can be 40 nm, which can filter out most of the solid particles, microparticles and most of the bacterial microorganisms in the sewage. The width of the separation ring 113 is 4.5 - 5 mm, and the number of the circular through holes 1134 can be 1 to multiple, preferably four; the filter element 1132 can be cotton, sponge, filter plate or other substances that can play a filtering role. The filter element 1132 can be arranged in the filtrate channel 12 or near the inner wall 1137 of the separation ring 113 of the circular through hole 1134. The circular through hole 1134 above the filter element 1132 forms the filtrate channel 12. The liquid to be filtered enters the liquid collection channel 13 after being filtered by the filter element 1132 in the filtrate channel 12.

[0046] In some embodiments, referring to Figure 4 and Figure 5 , an anti-cross-leakage member is provided on the separation ring 113. When the filtration membrane 112 is damaged, the pollution particles in the liquid to be filtered will be filtered by the anti-cross-leakage member and will not enter the liquid collection channel 13, thereby preventing the pollution particles in the liquid to be filtered from polluting the filtered liquid. In addition, when the filtration membrane 112 device is in standby shutdown operation, the pollution particles in the external sewage that have not been filtered by the filtration membrane 112 will be blocked by the anti-cross-leakage member in the filtrate channel 12. Therefore, the liquid to be filtered will not backflow to the undamaged membrane, ensuring the water production and water production quality.

[0047] Preferably, the anti-cross-leakage member can be the micron holes 1133. The micron holes 1133 can be opened on the filter element 1132. The aperture of the micron holes 1133 is 100 - 150 nm, which can play a role in filtering large particle impurities. When the filtration membrane 112 is damaged and leaks, the impurities in the sewage or the liquid to be filtered will be intercepted by the micron holes 1133, thereby preventing the impurities and the like from entering the liquid collection channel 13 from the filtrate channel 12 and causing pollution to the filtered liquid.

[0048] In some embodiments, referring to Figure 4 and Figure 5 , the separation ring 113 includes a first sub-separation ring 1135 and a second sub-separation ring 1136. A filtration membrane 112 is sandwiched between the first sub-separation ring 1135 and the second sub-separation ring 1136 to form the filtration unit 11. The filtration membrane 112 has a mounting hole, and the separation ring 113 passes through the mounting hole. A plurality of the filtration units 11 are connected in series in sequence so that the through holes of the separation ring 113 are communicated with each other to form the liquid collection channel 13.

[0049] In this embodiment, the separation ring 113 is detachably divided into a first sub-separation ring 1135 and a second sub-separation ring 1136. The first sub-separation ring 1135 and the second sub-separation ring 1136 have semi-circular through holes on the side. The method of sandwiching a filter membrane 112 between the first sub-separation ring 1135 and the second sub-separation ring 1136 to form the filter unit 11 is as follows: Place the sides of the first sub-separation ring 1135 and the second sub-separation ring 1136 with semi-circular through holes symmetrically with respect to the filter membrane 112 to form the filter unit 11, and combine the semi-circular through holes of the first sub-separation ring 1135 and the second sub-separation ring 1136 into a circular through hole 1134 to form the filtrate channel 12. Since the filter units 11 are connected in series in sequence, there is a spacing between each filter membrane 112, which can block some large-particle impurities outside the filter membrane 112. At the same time, several filter units 11 are connected in series in sequence, so that the liquid collection channel 13 is communicated with several filtrate channels 12. And because the anti-leakage parts are provided on the separation ring 113, it can play a role in filtering large-particle impurities. When the filter membrane 112 is damaged, external contaminated particulate matter will be blocked by the separation ring 113 in the filtrate channel 12 into the bodies of the respective filter membranes 112 and will not enter the liquid collection channel 13, forming a secondary filtration protection function, thereby realizing the anti-leakage protection effect.

[0050] In some embodiments, referring to Figure 6 , the filter membrane device further includes a liquid collection assembly. The liquid collection assembly includes a liquid collection pipe 21. The liquid collection pipe 21 is disposed through the liquid collection channel 13, and the liquid collection pipe 21 is communicated with the liquid collection channel 13.

[0051] In this embodiment, the liquid collection pipe 21 is disposed through the liquid collection channel 13, facilitating the filtered liquid to enter the liquid collection pipe 21 from the liquid collection channel 13.

[0052] In some embodiments, continuing to refer to Figure 6 , the liquid collection pipe 21 has a liquid outlet, and the liquid outlet is located at one end of the liquid collection pipe 21; a liquid inlet hole 211 is formed in the pipe wall of the liquid collection pipe 21, and the liquid collection pipe 21 is communicated with the liquid collection channel 13 through the liquid inlet hole 211.

[0053] In this embodiment, the liquid filtered by the filter membrane 112 enters the liquid collection pipe 21 through the liquid inlet hole 211 in the liquid collection channel 13 and is finally discharged through the liquid outlet in the liquid collection pipe 21.

[0054] In some embodiments, referring to Figure 5, the separation ring 113 has a fixing part 1131, the fixing part 1131 is located on the inner wall 1137 of the separation ring 113, and the fixing part 1131 abuts against the liquid collecting pipe 21 for fixing the liquid collecting pipe 21 in the liquid collecting channel 13, and the liquid collecting channel 13 is formed between the inner wall 1137 of the separation ring 113 and the liquid collecting pipe 21.

[0055] In this embodiment, the fixing part 1131 and the separation ring 113 can be integrally formed, or can be connected to the inner side wall of the separation ring 113 by other connection means, such as connection means well-known to those skilled in the art such as threaded connection and snap connection. The number of the fixing parts 1131 can be two or more to fix the liquid collecting pipe 21.

[0056] In some embodiments, referring to Figure 1 , the filter membrane device further includes a fastening assembly, and the fastening assembly is arranged at both ends of the filter assembly for fastening a plurality of the filter units 11.

[0057] In some embodiments, the fastening assembly includes: a first fastener 31 arranged at one end of the filter assembly away from the liquid outlet; a second fastener 32 arranged at one end of the filter assembly close to the liquid outlet, and the first fastener 31 and the second fastener 32 cooperate with each other to fasten a plurality of the filter units 11.

[0058] In this embodiment, one end of the first fastener 31 and the second fastener 32 has a circular groove, and the circular groove has an internal thread structure. Both ends of the liquid collecting pipe 21 are provided with an external thread structure matching the internal thread structure. The two ends of the liquid collecting pipe 21 are respectively contacted with the circular groove and the first fastener 31 and the second fastener 32 are rotated so that the first fastener 31 and the second fastener 32 are connected to the liquid collecting pipe 21, and a plurality of the filter units 11 connected in series on the liquid collecting pipe 21 are fastened.

[0059] In some embodiments, the liquid collecting assembly further includes a negative pressure device arranged at the liquid outlet, and the negative pressure device is used to generate negative pressure in the liquid collecting pipe 21 so that the filtered liquid is discharged from the liquid outlet.

[0060] In this embodiment, in order to improve the filtration efficiency of the filter membrane device, the filter membrane device can be used in cooperation with a negative pressure device. The negative pressure device can generate negative pressure in the liquid collecting pipe 21 through negative pressure suction, so that the liquid to be filtered enters the liquid collecting pipe 21 through the filter unit 11 and is discharged from the liquid outlet of the liquid collecting pipe 21. Specifically, the negative pressure device can be a vacuum pump, a jet pump, etc.

[0061] In another embodiment provided by the present utility model, a filtration system is provided, including the filtration membrane device mentioned in the above embodiment, which can be used for filtering sewage, wastewater, etc.

[0062] In summary, in the present utility model, by providing an anti-cross-leakage member on the partition ring 113, the liquid filtered by the filtration membrane 112 enters the liquid collection channel 13 after being secondarily filtered by the anti-cross-leakage member. When the filtration membrane 112 is damaged, the pollution particles in the liquid to be filtered will be filtered by the anti-cross-leakage member and will not enter the liquid collection channel 13, thereby preventing the pollution particles of the liquid to be filtered from contaminating the filtered liquid. In addition, when the filtration membrane device is in standby or shutdown operation, the pollution particles in the external sewage or the liquid to be filtered will be blocked by the anti-cross-leakage member. Therefore, the liquid to be filtered will not backflow to the undamaged membrane, and thus the undamaged membrane will not be contaminated.

[0063] As mentioned above, the above are only the specific implementation manners of the embodiments of the present application, but the protection scope of the embodiments of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the embodiments of the present application should be covered by the protection scope of the embodiments of the present application. Therefore, the protection scope of the embodiments of the present application should be subject to the protection scope of the claims.

Claims

1. A filter membrane device for filtering contaminated particulate matter in a liquid to be filtered, characterized in that, Comprising: A filtration component, including a plurality of filtration units connected in series in sequence. Each filtration unit has a through-hole and a filtration membrane. The distance between the filtration membranes on two adjacent filtration units is less than the diameter of the contaminant particulate matter. A filtrate channel is formed on each filtration unit. The through-holes of the plurality of filtration units are interconnected to form a liquid collection channel, and the filtrate channel is communicated with the liquid collection channel.

2. The filtration membrane device according to claim 1, wherein, Each filtration unit further includes: A partition ring, on which the filtrate channel is formed. The outer wall of the partition ring is provided with the filtration membrane. The inner walls of the plurality of filtration units are interconnected to form the liquid collection channel; A filter element, disposed in the filtrate channel.

3. The filtration membrane device according to claim 2, wherein, The partition ring includes a first sub-partition ring and a second sub-partition ring. A filtration membrane is clamped between the first sub-partition ring and the second sub-partition ring to form the filtration unit. The filtration membrane has a mounting hole, and the partition ring is inserted through the mounting hole. The through-holes of the plurality of filtration units are interconnected to form the liquid collection channel.

4. The filtration membrane device according to claim 2, characterized in that, The filtration membrane device further includes: A liquid collection component, which includes a liquid collection pipe. The liquid collection pipe is inserted through the liquid collection channel, and the liquid collection pipe is communicated with the liquid collection channel.

5. The filtration membrane device according to claim 4, wherein, The liquid collection pipe has a liquid outlet, and the liquid outlet is located at one end of the liquid collection pipe; Liquid inlet holes are formed on the pipe wall of the liquid collection pipe, and the liquid collection pipe is communicated with the liquid collection channel through the liquid inlet holes.

6. The filter membrane device according to claim 4, characterized in that, The partition ring has a fixing part, and the fixing part is located in the through-hole of the partition ring. The fixing part abuts against the liquid collection pipe for fixing the liquid collection pipe in the liquid collection channel and forming a liquid collection channel between the through-hole of the partition ring and the liquid collection pipe.

7. The filter membrane device according to claim 5, characterized in that, The filtration membrane device further includes: A fastening component, disposed at both ends of the filtration component. The fastening component is used for fastening the plurality of filtration units.

8. The filtration membrane device according to claim 7, wherein The fastening component includes: A first fastener, disposed at one end of the filtration component away from the liquid outlet; A second fastener, disposed at one end of the filtration component close to the liquid outlet. The first fastener and the second fastener cooperate with each other to fasten the plurality of filtration units.

9. The filtration membrane device according to claim 5, characterized in that, The liquid collection component further includes: A negative pressure device, disposed at the liquid outlet. The negative pressure device is used for generating negative pressure in the liquid collection pipe so that the filtered liquid is discharged from the liquid outlet.

10. A filtering system, characterized in that, The filtration system includes the filtration membrane device according to any one of claims 1 to 9.

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