A filter cartridge assembly, an air float tank and a method of cleaning a filter cartridge assembly

Abstract

The application discloses a filter element assembly, a gas float tank and a cleaning method of the filter element assembly, and relates to the technical field of ship sewage treatment. The filter element assembly comprises: a plurality of filter units arranged along a first direction; the filter unit comprises a plurality of filter elements arranged along a second direction; the first direction intersects the second direction; a first cleaning device is arranged around the plurality of filter units, the first cleaning device is provided with a first water inlet and a first water outlet, the first water inlet is used for inputting a first working medium, and the first water outlet is arranged towards the filter unit; a second cleaning device is arranged between two adjacent filter units; the second cleaning device is provided with a second water inlet and a second water outlet, the second water inlet is used for inputting a second working medium, and the second water outlet is arranged towards the filter unit. In this way, the filter unit is cleaned from different directions by the first cleaning device and the second cleaning device, the filter element is prevented from being blocked, the maintenance cost of the filter element assembly is reduced, and the occupied space of the filter element assembly is saved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ship sewage treatment, in particular to a filter element assembly, an air flotation tank and a cleaning method of the filter element assembly. BACKGROUND

[0002] In recent years, in order to treat exhaust gas generated by diesel engines on large container ships and liquefied natural gas (LNG) transport ships, an exhaust gas recirculation system is widely used. However, the exhaust gas recirculation system works to produce oil-containing soot sewage that cannot be directly discharged.

[0003] At present, a filter is mainly used on ships to treat oil-containing soot sewage. However, micron-sized oil molecules and soot are easy to block the filter element, and frequent cleaning and replacement of the filter element require high costs, and the filter also needs to independently occupy limited space on the ship. SUMMARY

[0004] The embodiment of the present application provides a filter element assembly, which is cleaned by a first cleaning device and a second cleaning device from different directions, so as to solve the problems of easy blocking of the filter element of the filter, high maintenance cost and large occupied space in the prior art; the embodiment of the present application also provides an air flotation tank; and the embodiment of the present application further provides a cleaning method of the filter element assembly.

[0005] The embodiment of the present application provides a filter element assembly, which comprises:

[0006] A plurality of filter units, the plurality of filter units are arranged along a first direction; the filter unit comprises a plurality of filter elements, and the plurality of filter elements are arranged along a second direction; the first direction intersects the second direction;

[0007] A first cleaning device, which is arranged around the plurality of filter units, has a first water inlet and a first water outlet, the first water inlet is used for inputting a first working medium, and the first water outlet is arranged towards the filter unit;

[0008] A second cleaning device, which is arranged between two adjacent filter units, has a second water inlet and a second water outlet, the second water inlet is used for inputting a second working medium, and the second water outlet is arranged towards the filter unit.

[0009] In some embodiments, the first cleaning device comprises:

[0010] A first pipeline and a plurality of second pipelines in communication with the first pipeline, and the plurality of second pipelines are arranged along a third direction; the third direction is an extension direction of the filter element;

[0011] The first pipe has the first water inlet at one end away from the second pipe, and the second pipe has the first water outlet at one end away from the first pipe.

[0012] In some embodiments, the plurality of second pipes are arranged at equal intervals to cover the filter element in the third direction.

[0013] In some embodiments, the plurality of second pipes have different lengths.

[0014] In some embodiments, the second cleaning device comprises:

[0015] a third pipe and a fourth pipe in communication with the third pipe;

[0016] The third pipe has the second water inlet at one end away from the fourth pipe, the fourth pipe has a plurality of second water outlets, and the second water outlets are arranged towards the filter element.

[0017] In some embodiments, in the first direction, at least a part of the projection of the filter element is located between two adjacent fourth pipes.

[0018] In some embodiments, each filter element corresponds to at least one second water outlet.

[0019] In some embodiments, the filter unit further comprises:

[0020] a first fixed plate and a second fixed plate arranged opposite in the third direction, the filter element is arranged between the first fixed plate and the second fixed plate, one end of the filter element close to the first fixed plate is sealed, and the other end of the filter element close to the second fixed plate has a third water outlet;

[0021] a plurality of fifth pipes, each fifth pipe corresponds to one filter element and is in communication with the third water outlet;

[0022] a sixth pipe in communication with the plurality of fifth pipes, and the sixth pipe has a fourth water outlet at one end away from the fifth pipe, the fourth water outlet is used to output the third working medium generated after the first working medium is filtered by the filter element.

[0023] In some embodiments, further comprising:

[0024] a track arranged on the side of the first fixed plate away from the filter element, the track is provided with a guide groove;

[0025] a plurality of pulleys arranged on the side of the first fixed plate away from the filter element, the pulleys are matched with the guide groove to move the pulleys in the extension direction of the guide groove;

[0026] A limiting member is connected with the track, and is used for limiting the first fixed plate; and one end of the first fixed plate, which is away from the limiting member, is detachably connected with the track.

[0027] A support is connected with the track.

[0028] Correspondingly, the application further provides a gas float tank, which comprises:

[0029] A tank body has an accommodating space inside.

[0030] The filter core assembly is arranged in the accommodating space, and the support of the filter core assembly is connected with the tank body.

[0031] Correspondingly, the application further provides a cleaning method of the filter core assembly, which comprises:

[0032] The first working medium is injected into the first cleaning device through the first water inlet, and the first working medium is discharged through the first water outlet to clean the filter unit;

[0033] The second working medium is injected into the second cleaning device through the second water inlet, and the second working medium is discharged through the second water outlet to clean the filter unit.

[0034] In some embodiments, the method further comprises:

[0035] The third working medium is injected into the fourth water outlet, and the third working medium flows through the sixth pipeline and the plurality of fifth pipelines to backwash the filter unit.

[0036] In some embodiments, the method further comprises:

[0037] One end of the first fixed plate, which is away from the limiting member, is detached from the track;

[0038] The filter unit is pulled out of the track through cooperation of the pulley and the guide groove, and the filter core is detached, cleaned or replaced.

[0039] Compared with the prior art, the filter element assembly provided by the embodiment of the application comprises: a plurality of filter units arranged along a first direction; the filter unit comprises a plurality of filter elements arranged along a second direction; the first direction intersects the second direction; a first cleaning device is arranged around the plurality of filter units, and the first cleaning device has a first water inlet and a first water outlet; the first water inlet is used for inputting a first working medium, and the first water outlet is arranged towards the filter unit; a second cleaning device is arranged between two adjacent filter units; the second cleaning device has a second water inlet and a second water outlet; the second water inlet is used for inputting a second working medium, and the second water outlet is arranged towards the filter unit. In this way, the filter unit is cleaned from different directions by the first cleaning device and the second cleaning device, the filter element is prevented from being blocked, the maintenance cost of the filter element assembly is reduced, and the occupied space of the filter element assembly is saved.

[0040] It can be understood that, compared with the prior art, the air float tank provided by the embodiment of the application has all the technical features and beneficial effects of the filter element assembly described above, which will not be repeated here.

[0041] It can be understood that, compared with the prior art, the cleaning method of the filter element assembly provided by the embodiment of the application has all the technical features and beneficial effects of the filter element assembly described above, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0043] Figure 1 A structural schematic diagram of a filter element assembly provided by the embodiment of the application is shown in the figure.

[0044] Figure 2 A structural schematic diagram of a first cleaning device in a filter element assembly provided by the embodiment of the application is shown in the figure.

[0045] Figure 3 A structural schematic diagram of a second cleaning device in a filter element assembly provided by the embodiment of the application is shown in the figure.

[0046] Figure 4 A structural schematic diagram of a filter unit in a filter element assembly provided by the embodiment of the application is shown in the figure.

[0047] Figure 5 A structural schematic diagram of a filter unit along a first direction in a filter element assembly provided by the embodiment of the application is shown in the figure.

[0048] Figure 6A structure schematic diagram of an air float tank provided by an embodiment of the present application is provided.

[0049] Figure 7 A cleaning schematic diagram of a filter element assembly in an air float tank provided by an embodiment of the present application is provided.

[0050] The figure mark: 100-filter unit; 110-filter element; 111-third water outlet; 120-first fixed plate; 130-second fixed plate; 140-fifth pipeline; 150-sixth pipeline; 151-fourth water outlet; 200-first cleaning device; 210-first water inlet; 220-first water outlet; 230-first pipeline; 240-second pipeline; 300-second cleaning device; 310-second water inlet; 320-second water outlet; 330-third pipeline; 340-fourth pipeline; 400-rail; 410-guide groove; 500-pulley; 600-limiting piece; 700-bracket; 800-air float tank; X-first direction; Y-second direction; Z-third direction. DETAILED DESCRIPTION

[0051] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person skilled in the art without creative work fall within the scope of protection of the present application.

[0052] The applicant finds that the oil-containing soot sewage generated by the exhaust gas recirculation system cannot be directly discharged, and needs to meet the requirement that the oil content is less than 15 ppm to be allowed to be discharged, and the turbidity of the clean water used in the circulation cannot be higher than 150 ppm. At present, most of the treatment methods of the oil-containing soot sewage on the ship contain the filtering method, but the traditional filtering method needs to use a filter element, and the micron-level oil molecules and soot are easy to block the filter element, and frequent flushing and replacement of the filter element need high cost, and the filter also needs to independently occupy the limited space on the ship. Therefore, in order to solve the problems of easy blocking of the filter element of the filter, high maintenance cost and large occupied space, the present application provides a micron-level filter element assembly which is compact in structure, comprehensive in function, not easy to block and convenient to maintain.

[0053] Therefore, the present application provides a filter element assembly, please refer to Figure 1 、 Figure 2 and Figure 3 , Figure 1 A structure schematic diagram of a filter element assembly provided by an embodiment of the present application is shown; Figure 2 A structure schematic diagram of a first cleaning device in a filter element assembly provided by an embodiment of the present application is shown; Figure 3A structure schematic diagram of a second cleaning device in a filter element assembly is shown. The first embodiment of the present application provides a filter element assembly, which includes a first cleaning device 200, a second cleaning device 300 and a plurality of filter units 100. The plurality of filter units 100 are arranged along a first direction X; the filter unit 100 includes a plurality of filter elements 110, and the plurality of filter elements 110 are arranged along a second direction Y; the first direction X intersects the second direction Y; the first cleaning device 200 is arranged around the plurality of filter units 100, and the first cleaning device 200 has a first water inlet 210 and a first water outlet 220; the first water inlet 210 is used for inputting a first working medium, and the first water outlet 220 is arranged towards the filter unit 100; the second cleaning device 300 is arranged between two adjacent filter units 100; the second cleaning device 300 has a second water inlet 310 and a second water outlet 320; the second water inlet 310 is used for inputting a second working medium, and the second water outlet 320 is arranged towards the filter unit 100. In this way, the filter unit 100 is cleaned from different directions by the first cleaning device 200 and the second cleaning device 300, so as to avoid the filter element 110 from being blocked, reduce the maintenance cost of the filter element assembly, and save the occupied space of the filter element assembly.

[0054] Specifically, the use scenario of the filter element assembly of the present application is a full tank air float tank 800, and at this time, the air float tank 800 is filled with a first working medium, i.e. raw water that needs to be filtered and purified. When the air float tank 800 is working, the first working medium enters the first cleaning device 200 from the first water inlet 210 and then flows out from the first water outlet 220, and the first water outlet 220 is arranged towards the filter unit 100, so that the first working medium can flow to the surface of the filter unit 100, and the impurities on the surface of the filter unit 100, especially the impurities on the surface of the filter element 110, are washed away by the flow of the first working medium, thereby avoiding the surface of the filter element 110 from being blocked. At the same time, the second working medium enters the second cleaning device 300 from the second water inlet 310 and then flows out from the second water outlet 320, and the second water outlet 320 is arranged towards the filter unit 100, so that the second working medium can flow to the surface of the filter unit 100, and the impurities on the surface of the filter unit 100, especially the impurities on the surface of the filter element 110, are washed away by the flow of the second working medium, thereby avoiding the surface of the filter element 110 from being blocked. Further, the second working medium can be dissolved air water, and the impurities on the surface of the filter unit 100 are further cleaned by the bubbles in the dissolved air water, thereby improving the cleaning effect on the filter unit 100.

[0055] It can be understood that when the plurality of filter units 100 are arranged along the first direction X, the first water outlet 220 is aligned with the outer surface of the plurality of filter units 100 as a whole, and the second water outlet 320 is aligned with the surface between any two adjacent filter units 100. In this way, the filter units 100 can be cleaned in all directions and continuously by the first cleaning device 200 and the second cleaning device 300, thereby avoiding clogging of the filter element 110. Moreover, the above arrangement does not require additional space, and the filter assembly can be arranged in the accommodation space inside the air float tank 800, thereby saving the occupied space of the filter assembly.

[0056] Please refer again to Figure 2 In some embodiments, the first cleaning device 200 includes a first pipe 230 and a plurality of second pipes 240 in communication with the first pipe 230, and the plurality of second pipes 240 are arranged along a third direction Z. The third direction Z is the extension direction of the filter element 110. The end of the first pipe 230 away from the second pipe 240 is the first water inlet 210, and the end of the second pipe 240 away from the first pipe 230 is the first water outlet 220. Specifically, the plurality of second pipes 240 are arranged along the third direction Z, and the first water outlet 220 of each second pipe 240 can be directed to the filter element 110 at different positions in the third direction Z, thereby achieving cleaning of different positions of the filter element 110. In addition, the first working medium flows out from each first water outlet 220 and is staggered, thereby further covering the filter element 110 in the third direction Z, avoiding the accumulation of impurities on the filter element 110, and improving the cleaning effect.

[0057] In order to further enhance the cleaning effect of the filter element 110, please refer again to Figure 2 In some embodiments, the plurality of second pipes 240 are arranged at equal intervals to cover the filter element 110 along the third direction Z. Specifically, by arranging the plurality of second pipes 240 at equal intervals, the first working medium can uniformly cover the entire surface of the filter element 110, ensuring that each part of the filter element 110 can be fully cleaned, even the corner or edge position of the filter element 110 can also be fully contacted with the first working medium, thereby avoiding the problems of impurity residue or incomplete cleaning due to uneven cleaning. In addition, the arrangement of the plurality of second pipes 240 can increase the contact area between the first working medium and the surface of the filter element 110, thereby improving the cleaning efficiency.

[0058] In order to further enhance the cleaning effect of the filter element 110, please refer again to Figure 2In some embodiments, the plurality of second pipes 240 have different lengths. It can be understood that the first working medium flows out of the first water outlet 220 and forms a cyclone around the filter unit 100. By arranging the plurality of second pipes 240, and the second pipes 240 having different lengths, cyclones of different lengths can be formed at different positions to avoid attenuation of the cyclone, ensure that the cyclone can continuously move around the filter element 110, flush the filter element 110 at all times, and ensure the cleaning effect.

[0059] Please refer again to Figure 3 In some embodiments, the second cleaning device 300 comprises: a third pipe 330, and a fourth pipe 340 in communication with the third pipe 330; wherein the end of the third pipe 330 away from the fourth pipe 340 is the second water inlet 310, the fourth pipe 340 has a plurality of second water outlets 320, and the second water outlets 320 are arranged towards the filter element 110. Specifically, the second cleaning device 300 is arranged between two adjacent filter units 100, the second working medium enters the fourth pipe 340 through the third pipe 330, and flows out from the second water outlet 320 towards the filter element 110, thereby achieving cleaning of the surface between any two adjacent filter units 100. In this way, the second cleaning device 300 supplements the cleaning of positions that cannot be cleaned by the first cleaning device 200, thereby further improving the cleaning effect of the filter element 110.

[0060] Please refer again to Figure 4 and Figure 5 , Figure 4 Fig. 1 shows a structure diagram of a filter element assembly according to an embodiment of the present application; Figure 5 Fig. 2 shows a structure diagram of a filter unit along a first direction in the filter element assembly according to an embodiment of the present application. In some embodiments, along the first direction X, at least part of the orthographic projection of the filter element 110 is located between two adjacent fourth pipes 340. In this way, each filter element 110 can be flushed by two fourth pipes 340 at the same time, further increasing the coverage area of the second water outlet 320 on the filter element 110, and improving the flushing effect of the filter element 110. Further, the fourth pipe 340 extends along the third direction Z, and a plurality of fourth pipes 340 are arranged along the second direction Y, and a plurality of second water outlets 320 are arranged on the fourth pipe 340 along the third direction Z. It can be understood that the second water outlet 320 is distributed on both sides of the fourth pipe 340 along the first direction X, thereby better cleaning the filter element 110.

[0061] In some embodiments, each filter element 110 corresponds to at least one second water outlet 320. In this way, each filter element 110 can be cleaned by a second water outlet 320, ensuring the cleaning effect of the filter element 110.

[0062] Please refer again to Figure 4 andFigure 5 In some embodiments, the filtering unit 100 further comprises a first fixed plate 120 and a second fixed plate 130 arranged opposite along the third direction Z, the filter element 110 is arranged between the first fixed plate 120 and the second fixed plate 130, and an end of the filter element 110 close to the first fixed plate 120 is sealed, and an end of the filter element 110 close to the second fixed plate 130 has a third water outlet 111; a plurality of fifth pipes 140, each fifth pipe 140 corresponds to one filter element 110 and communicates with the third water outlet 111; a sixth pipe 150, the sixth pipe 150 communicates with the plurality of fifth pipes 140, and an end of the sixth pipe 150 away from the fifth pipes 140 has a fourth water outlet 151, and the fourth water outlet 151 is used to output the third working medium generated after the first working medium is filtered by the filter element 110. Specifically, the first fixed plate 120 and the second fixed plate 130 can fix the position of the filter element 110 and keep the filter element 110 stable. The third water outlet 111 makes the third working medium output from a specific position of the filter element 110, which facilitates the collection of the third working medium, and then through the plurality of fifth pipes 140 and the third water outlet 111, each filter element 110 has an independent water outlet channel, and then collected into the sixth pipe 150, so that the third working medium can be effectively collected and output for subsequent use or processing. It should be noted that the first fixed plate 120 can be provided with a lifting ring, thereby serving as a lifting point for assembling the filter element assembly. In addition, the second cleaning device 300 can also be connected with the first fixed plate 120 through the connecting device, and / or connected with the second fixed plate 130 through the connecting device, so as to fix the second cleaning device 300 and improve the stability of the second cleaning device 300.

[0063] It should be noted that when the flux of the filter element 110 decreases, the third working medium enters the sixth pipe 150 again through the fourth water outlet 151, enters the filter element 110 along the fifth pipe 140, flows out from the surface of the filter element 110, carries away the particles adhered to the surface of the filter element 110, restores the membrane flux of the filter element 110, and completes the backwashing of the filter element 110.

[0064] In some embodiments, please refer again to Figure 1The filter element assembly further comprises: a track 400 arranged on the side of the first fixed plate 120 away from the filter element 110, the track 400 being provided with a guide groove 410; a plurality of pulleys 500 arranged on the side of the first fixed plate 120 away from the filter element 110, the pulley 500 being matched with the guide groove 410 to enable the pulley 500 to move along the extension direction of the guide groove 410; a limiting piece 600 connected with the track 400, the limiting piece 600 being used for limiting the first fixed plate 120; the end of the first fixed plate 120 away from the limiting piece 600 being detachably connected with the track 400; and a support 700 connected with the track 400. When the life cycle of the filter element 110 reaches, the first cleaning device 200, the second cleaning device 300 and the backwashing effect are not obvious, and the filter element 110 needs to be replaced. Therefore, the end of the first fixed plate 120 away from the limiting piece 600 is detached from the track 400, and the filter element 110 is pulled out of the filter unit 100 along the extension direction of the guide groove 410, and then the filter element 110 is replaced through the lateral opening (not shown in the figure) of the air float tank 800.

[0065] Compared with the prior art, the filter element assembly provided by the embodiment of the present application comprises a first cleaning device 200, a second cleaning device 300 and a plurality of filter units 100. The plurality of filter units 100 are arranged along a first direction X. The filter unit 100 comprises a plurality of filter elements 110, and the plurality of filter elements 110 are arranged along a second direction Y. The first direction X intersects the second direction Y. The first cleaning device 200 is arranged around the plurality of filter units 100. The first cleaning device 200 has a first water inlet 210 and a first water outlet 220. The first water inlet 210 is used for inputting a first working medium. The first water outlet 220 is arranged towards the filter unit 100. The second cleaning device 300 is arranged between two adjacent filter units 100. The second cleaning device 300 has a second water inlet 310 and a second water outlet 320. The second water inlet 310 is used for inputting a second working medium. The second water outlet 320 is arranged towards the filter unit 100. In this way, the filter unit 100 is cleaned from different directions by the first cleaning device 200 and the second cleaning device 300, so as to avoid the filter element 110 from being blocked, reduce the maintenance cost of the filter element assembly, and save the occupied space of the filter element assembly.

[0066] Correspondingly, the embodiment of the present application further provides an air float tank, please refer to Figure 6 , Figure 6 The structure schematic diagram of the air float tank provided by the embodiment of the present application is shown. The air float tank comprises: a tank body, the tank body having an accommodating space inside; the filter element assembly of any one of the above embodiments, the filter element assembly being arranged in the accommodating space, and the support 700 of the filter element assembly being connected with the tank body.

[0067] It can be understood that, compared with the prior art, the air float tank provided by the embodiment of the present application has all the technical features and beneficial effects of the above filter element assembly, which will not be repeated here.

[0068] Correspondingly, the application also provides a cleaning method of the filter element assembly, please refer to Figure 7 , Figure 7 A cleaning schematic diagram of the filter element assembly in the air float tank is shown. The cleaning method comprises the following steps:

[0069] S1, injecting a first working medium into the first cleaning device 200 through the first water inlet 210, the first working medium is discharged through the first water outlet 220, and the filter unit 100 is cleaned;

[0070] S2, injecting a second working medium into the second cleaning device 300 through the second water inlet 310, the second working medium is discharged through the second water outlet 320, and the filter unit 100 is cleaned.

[0071] In some embodiments, the cleaning method further comprises:

[0072] S3, injecting a third working medium through the fourth water outlet 151, the third working medium flows through the sixth pipeline 150 and the plurality of fifth pipelines 140, and the filter unit 100 is backwashed.

[0073] In some embodiments, the cleaning method further comprises:

[0074] S4, disassembling the first fixed plate 120 away from one end of the limiting piece 600 and the track 400;

[0075] S5, pulling the filter unit 100 out of the track 400 through the cooperation of the pulley 500 and the guide groove 410, and disassembling, cleaning or replacing the filter element 110.

[0076] It can be understood that, compared with the prior art, the cleaning method of the filter element assembly provided by the application has all the technical features and beneficial effects of the filter element assembly described above, which will not be repeated here.

[0077] The above describes in detail the filter element assembly, the air float tank and the cleaning method of the filter element assembly provided by the application. The principles and implementation manners of the application are described by applying specific examples. The above embodiment is only used to help understand the technical solutions and core ideas of the application. Those skilled in the art should understand that the technical solutions recorded in the above embodiments can be modified or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the application.

Claims

1. A filter element assembly, characterized in that, include: A plurality of filter units (100) are arranged along a first direction (X); each filter unit (100) includes a plurality of filter elements (110), which are arranged along a second direction (Y); the first direction (X) and the second direction (Y) intersect. A first cleaning device (200) is arranged around a plurality of the filter units (100). The first cleaning device (200) has a first inlet (210) and a first outlet (220). The first inlet (210) is used to input a first working fluid, and the first outlet (220) is arranged toward the filter unit (100). A second cleaning device (300) is disposed between two adjacent filter units (100); the second cleaning device (300) has a second inlet (310) and a second outlet (320), the second inlet (310) is used to input a second working fluid, and the second outlet (320) is disposed toward the filter unit (100).

2. The filter element assembly as described in claim 1, characterized in that, The first cleaning device (200) includes: A first conduit (230) and a plurality of second conduits (240) connected to the first conduit (230), wherein the plurality of second conduits (240) are arranged along a third direction (Z); the third direction (Z) is the extension direction of the filter element (110); Wherein, the end of the first pipe (230) away from the second pipe (240) is the first water inlet (210), and the end of the second pipe (240) away from the first pipe (230) is the first water outlet (220).

3. The filter element assembly as described in claim 2, characterized in that, Multiple second pipes (240) are arranged at equal intervals to cover the filter element (110) along the third direction (Z).

4. The filter element assembly as described in claim 2, characterized in that, Multiple second pipes (240) have different lengths.

5. The filter element assembly as described in claim 1, characterized in that, The second cleaning device (300) includes: A third conduit (330), and a fourth conduit (340) connected to the third conduit (330); The third pipe (330) is located away from the fourth pipe (340) at one end, which is the second inlet (310). The fourth pipe (340) has multiple second outlets (320), and the second outlets (320) are arranged toward the filter element (110).

6. The filter element assembly as described in claim 5, characterized in that, Along the first direction (X), at least a portion of the orthographic projection of the filter element (110) lies between two adjacent fourth pipes (340).

7. The filter element assembly as described in claim 5, characterized in that, Each of the filter elements (110) corresponds to at least one second outlet (320).

8. The filter element assembly as claimed in claim 1, characterized in that, The filter unit (100) further includes: A first fixing plate (120) and a second fixing plate (130) are arranged opposite each other along a third direction (Z). The filter element (110) is disposed between the first fixing plate (120) and the second fixing plate (130). The end of the filter element (110) near the first fixing plate (120) is sealed. The end of the filter element (110) near the second fixing plate (130) has a third outlet (111). Multiple fifth pipes (140), each of the fifth pipes (140) corresponding to one of the filter elements (110), and connected to the third outlet (111); A sixth pipe (150) is connected to a plurality of fifth pipes (140), and the end of the sixth pipe (150) away from the fifth pipes (140) has a fourth outlet (151), which is used to output the third working fluid generated after the first working fluid is filtered by the filter element (110).

9. The filter element assembly as described in claim 8, characterized in that, Also includes: A track (400) is disposed on the side of the first fixing plate (120) away from the filter element (110), and the track (400) is provided with a guide groove (410); Multiple pulleys (500) are disposed on the side of the first fixing plate (120) away from the filter element (110). The pulleys (500) cooperate with the guide groove (410) so that the pulleys (500) can move along the extension direction of the guide groove (410). A limiting member (600) is connected to the track (400), and the limiting member (600) is used to limit the first fixing plate (120); the end of the first fixing plate (120) away from the limiting member (600) is detachably connected to the track (400); The bracket (700) is connected to the track (400).

10. An air flotation tank, characterized in that, include: A tank, the interior of which has a containment space; The filter element assembly as described in any one of claims 1-9, wherein the filter element assembly is disposed in the receiving space, and the support (700) of the filter element assembly is connected to the tank.

11. A method for cleaning a filter element assembly, characterized in that, include: The first working medium is injected into the first cleaning device (200) through the first inlet (210), and the first working medium is discharged through the first outlet (220) to clean the filter unit (100); The second working medium is injected into the second cleaning device (300) through the second inlet (310), and the second working medium is discharged through the second outlet (320) to clean the filter unit (100).

12. The cleaning method for the filter element assembly as described in claim 11, characterized in that, Also includes: The third working fluid is injected through the fourth outlet (151), and the third working fluid flows through the sixth pipe (150) and multiple fifth pipes (140) to backwash the filter unit (100).

13. The cleaning method for the filter element assembly as described in claim 11, characterized in that, Also includes: Disconnect the end of the first fixing plate (120) away from the limiting member (600) from the track (400); By using the pulley (500) and guide groove (410), the filter unit (100) is pulled out of the track (400), and the filter element (110) is disassembled, cleaned or replaced.

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