Circulating type multi-stage filtering equipment for tail gas treatment liquid

Abstract

The invention relates to the technical field of tail gas treatment liquid, in particular to circulating type multi-stage filtering equipment for tail gas treatment liquid, which comprises a filter cartridge and a rotating seat rotationally mounted at the top in the filter cartridge, a plurality of filtering cavities are formed in the rotating seat in a penetrating manner, and multi-stage filtering assemblies are arranged in the filtering cavities; a pushing assembly for driving the rotating seat to rotate intermittently is arranged on the filter cartridge; according to the device, the pushing assembly is combined with the rotating seat, so that the multiple multi-stage filtering assemblies are promoted to carry out anti-blocking multi-stage filtering treatment on tail gas treatment liquid one by one, and the corresponding filtering nets are synchronously promoted to turn over and remove impurities during filtering, so that continuous non-stop multi-stage filtering treatment is realized, and the filtering efficiency is ensured; and in the filtering and impurity discharging process, the filter screen is promoted to vibrate and the cleaning brush is promoted to move, so that the efficient filtering effect is further ensured, and meanwhile, the automatic discharging effect after the impurities and the residual liquid are fully separated is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of tail gas treatment liquid, and in particular to a circulating multi-stage filtering device for tail gas treatment liquid. Background Art

[0002] Exhaust treatment fluid, also known as automotive urea solution, is a key product to ensure that heavy-duty diesel vehicles meet the National IV emission standards. The raw materials mainly include special raw materials for automotive urea and ultrapure water. It is usually stored in large storage cylinders. After long-term use, the urea solution in the storage cylinder may precipitate and produce impurities. When it is exported for use, if the impurities are not effectively filtered, it will directly affect its use effect in the vehicle.

[0003] For example, in the prior art, there is a tail gas treatment liquid circulation filtration device with publication number CN222434294U, in which a filter cartridge connected to a liquid inlet pipe is detachably installed on the tank cover. Although it is convenient for cleaning the impurities accumulated inside, the tail gas treatment liquid cannot be filtered during the impurity cleaning period, making it difficult to achieve continuous multi-stage filtration without stopping the machine. Moreover, as the filtration time increases, the filtration efficiency will gradually decrease because the internal impurities cannot be discharged synchronously, thereby reducing the overall filtration efficiency. Summary of the invention

[0004] The purpose of the present invention is to provide a circulating multi-stage filtering device for exhaust gas treatment liquid to solve the technical defects mentioned above. It is to promote the combination of the component with the rotating seat to prompt multiple multi-stage filtering components to perform anti-blocking multi-stage filtering treatment on the exhaust gas treatment liquid one by one, and simultaneously prompt the corresponding filter screen to flip and remove impurities during the filtration, so as to realize continuous multi-stage filtering treatment without stopping to ensure the filtration efficiency; and in the process of filtering and removing impurities, the filter screen is prompted to vibrate and the cleaning brush is moved, so as to further ensure the efficient filtration effect and realize the automatic discharge effect after the impurities and residual liquid are fully separated.

[0005] The object of the present invention can be achieved by the following technical scheme: A circulating multi-stage filtering device for tail gas treatment liquid, comprising a filter cartridge, and a rotating seat rotatably mounted on the top of the filter cartridge, and a plurality of filter cavities are penetrated on the rotating seat, a multi-stage filter assembly is arranged in the filter cavity, and a driving assembly for driving the rotating seat to intermittently rotate is arranged on the filter cartridge;

[0006] The multi-stage filter assembly includes a rotating sleeve rotatably installed in the filter cavity and flipped in cooperation with the rotating seat, and a plurality of equidistantly distributed filter screens are installed on the rotating sleeve through a connecting frame. The pushing assembly includes a pushing column slidably installed on the filter cylinder, and a plurality of guide rods are installed on the annular side wall of the pushing column. A cam groove cooperating with the guide rod is provided on the annular inner wall of the rotating seat, and a yield groove cooperating with the corresponding guide rod is equidistantly provided at the bottom of the cam groove.

[0007] Preferably, a liquid inlet pipe and a liquid outlet pipe are fixedly connected to both sides of the top and bottom of the filter cartridge, respectively, and a debris removal channel rotatably connected to the rotating seat is fixedly connected to the bottom of the filter cartridge.

[0008] Preferably, the middle part of the filter cavity is a spherical cavity structure, the multiple filter nets form a spherical structure matching the spherical cavity, the cross-section of the filter net is a V-shaped structure, and the filter hole sizes of the multiple filter nets decrease from top to bottom.

[0009] Preferably, one end of the rotating sleeve is fixedly connected to a turntable, and a guide pin is eccentrically fixed to the turntable. A lower limit groove cooperating with the guide pin and an upper limit groove located above the lower limit groove are provided on the inner wall of the filter cylinder. An oblique groove and a reset groove are respectively connected between the ends of the upper limit groove and the lower limit groove.

[0010] Preferably, the rotating sleeve is internally rotatably connected to a rotating rod extending to its outside, and a plurality of elastic knocking rods are fixedly connected to the rotating rod, a plurality of protrusions are fixedly connected to the annular inner wall of the rotating sleeve, and a gear is fixedly connected to the rotating rod.

[0011] Preferably, a mounting plate is rotatably mounted on the push column below the guide rod, a toothed plate meshing with a corresponding gear is fixedly connected to the mounting plate, and the toothed plate is slidably connected to the rotating seat.

[0012] Preferably, a storage shell is fixedly connected to the top of the filter cartridge and located above the upper limit slot, and a lifting plate is slidably connected inside the storage shell, and a plurality of cleaning brushes are fixedly connected to the bottom of the lifting plate.

[0013] Preferably, a transverse plate is fixedly connected to the top of the push column, a support rod is fixedly connected between the transverse plate and the lifting plate, and an electric push rod is fixedly connected between the transverse plate and the filter cylinder.

[0014] The beneficial effects of the present invention are as follows:

[0015] (1) The present invention promotes the intermittent rotation of the rotating seat by the lifting movement of the push column, combined with the guide column and the cam groove, so that the multiple filter chambers and the filter screens inside them perform multi-stage filtering treatment on the exhaust gas treatment liquid one by one, and cooperate with the V-shaped structure of the filter screen to avoid the flat accumulation of impurities, thereby achieving the effect of rapid filtration of the exhaust gas treatment liquid; and with the help of the deflection linkage of the rotating seat, the filter screen is turned 90 degrees at a specified position and combined with the impurity discharge channel, so that impurities are discharged synchronously during filtration, so as to achieve continuous multi-stage filtration treatment without stopping, and further ensure the efficiency of the filtration treatment;

[0016] (2) The present invention also utilizes the movement of the push column, which can not only drive the cleaning brush to move between adjacent filter screens to assist in cleaning impurities on the filter screens, but also can combine the tooth plate and the gear to drive the rotating rod carrying the elastic knocking rod to rotate in the corresponding rotating sleeve, causing the filter screen to vibrate, further accelerating the filtration efficiency of the exhaust gas treatment liquid, while achieving full separation of the residual liquid in the impurities, and assisting the cleaning brush to improve the cleaning effect of the impurities on the filter screen, further ensuring the efficient filtration effect of the exhaust gas treatment liquid; in addition, it can also prompt the flipped filter screen to be reset to achieve effective flipping operation of the filter screen during the cyclic rotation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the accompanying drawings;

[0018] Figure 1 It is a schematic diagram of the structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the structure inside the filter cartridge of the present invention;

[0020] Figure 3 It is a schematic diagram of the structure of the filter cartridge of the present invention;

[0021] Figure 4 It is a structural schematic diagram of the rotating seat of the present invention;

[0022] Figure 5 It is a schematic diagram of the cooperation between the rotating seat and the pushing assembly of the present invention;

[0023] Figure 6 It is a schematic diagram of the cooperation between the rotating seat and the multi-stage filtering assembly of the present invention;

[0024] Figure 7 It is a schematic diagram of the cooperation between the multi-stage filtering component and the pushing component of the present invention;

[0025] Figure 8 It is a structural schematic diagram of the push assembly of the present invention;

[0026] Fig. 9 The structure of the multi-stage filter assembly of the present invention is shown in FIG. Figure 1 ;

[0027] Fig.10 The structure of the multi-stage filter assembly of the present invention is shown in FIG. Figure 2 .

[0028] Legend:

[0029] 1. Filter cartridge; 11. Impurity discharge channel; 12. Lower limit slot; 13. Upper limit slot; 14. Oblique slot; 15. Reset slot; 16. Storage shell; 17. Cleaning brush;

[0030] 2. Rotating seat; 21. Filter chamber; 22. Cam groove; 23. Yield groove;

[0031] 3. Multi-stage filter assembly; 31. Rotating sleeve; 32. Filter screen; 33. Guide pin; 34. Rotating rod; 35. Gear;

[0032] 4. Pushing assembly; 41. Pushing column; 42. Guide rod; 43. Tooth plate; 44. Electric push rod. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Example 1: Please refer to Figure 1-Figure 7 , Fig. 9 and Fig.10 As shown, the problem of difficulty in realizing continuous multi-stage filtering processing without stopping in the prior art can be solved by the following solution;

[0035] In this embodiment, a circulating multi-stage filtering device for tail gas treatment liquid comprises a filter cartridge 1, and a rotating seat 2 rotatably mounted on the top of the filter cartridge 1, and a plurality of filter chambers 21 are provided through the rotating seat 2, and a multi-stage filter assembly 3 is provided in the filter chamber 21. The rotating seat 2 rotates intermittently, so that the plurality of filter chambers 21 and the multi-stage filter assembly 3 inside thereof perform multi-stage filtering treatment on the tail gas treatment liquid one by one, and realizes continuous multi-stage filtering treatment without stopping, so as to ensure the efficiency of the filtering treatment. A driving assembly 4 is provided on the filter cartridge 1 to drive the rotating seat 2 to rotate intermittently;

[0036] The multi-stage filter assembly 3 includes a rotating sleeve 31 which is rotatably mounted in the filter chamber 21 and is turned over in cooperation with the rotating seat 2, and a plurality of equidistantly distributed filter screens 32 are mounted on the rotating sleeve 31 through a connecting frame, and a plurality of horizontal filter screens 32 are used to realize multi-stage filtering processing, and the rotating sleeve 31 is used to cause the horizontal filter screens 32 to be transformed into a vertical state, so as to discharge impurities on the plurality of filter screens 32;

[0037] The push assembly 4 includes a push column 41 slidably mounted on the filter cartridge 1, and a plurality of guide rods 42 are mounted on the annular side wall of the push column 41. A cam groove 22 matching the guide rod 42 is provided on the annular inner wall of the rotating seat 2. The push column 41 performs a lifting movement, and the guide rod 42 is guided by the cam groove 22, so that the rotating seat 2 deflects twice, so that the next filter chamber 21 is accurately rotated to the bottom of the feed pipe, and the corresponding filter chamber 21 is located directly above the impurity discharge channel 11.

[0038] The bottom of the cam groove 22 is equidistantly provided with a clearance groove 23 that cooperates with the corresponding guide rod 42. The guide rod 42 enters the corresponding clearance groove 23 directly below to limit the rotation of the rotating seat 2 without affecting the linkage effect of the continuous downward movement of the push column 41.

[0039] The guide rod 42 on the push column 41 enters the cam groove 22 from the corresponding give way groove 23, and then the push column 41 carries the guide rod 42 to move upward. Combined with the guidance of the guide rod 42 by the cam groove 22, the rotating seat 2 is caused to deflect once. Then, the push column 41 carries the guide rod 42 to move downward, causing the rotating seat 2 to deflect a second time, causing the next filter chamber 21 to filter the injected exhaust gas treatment liquid.

[0040] The top and bottom sides of the filter cartridge 1 are respectively fixedly connected with a liquid inlet pipe and a liquid outlet pipe. The exhaust gas treatment liquid is injected into a filter cavity 21 on the rotating seat 2 through the liquid inlet pipe, and a multi-stage filtering treatment is performed through multiple filter screens 32 in the filter cavity 21 to filter and intercept impurities in the exhaust gas treatment liquid. The filtered exhaust gas treatment liquid flows to the bottom of the filter cartridge 1 and is then discharged through the liquid outlet pipe. The exhaust gas treatment liquid is injected into the filter cartridge 1, and the liquid inlet pipe is connected to the liquid outlet pipe through a connecting pipe and a circulating pump, so that the exhaust gas treatment liquid can be circulated and filtered. The bottom of the filter cartridge 1 is fixedly connected with an impurity removal channel 11 rotatably connected to the rotating seat 2.

[0041] The middle part of the filter cavity 21 is a spherical cavity structure, and a plurality of filter screens 32 form a spherical structure matched with the spherical cavity, so that the filter screen 32 can achieve a flipping effect in the filter cavity 21 and can effectively filter the exhaust gas treatment liquid in the filter cavity 21. The cross section of the filter screen 32 is a V-shaped structure;

[0042] During the filtering process, the injection impact of the exhaust gas treatment liquid combined with the V-shaped structure of the filter mesh 32 causes the intercepted impurities to automatically move to the edge of the filter mesh 32, avoiding the flat accumulation of impurities and ensuring the rapid filtration of the filter chamber 21. The filter pore sizes of multiple filter meshes 32 decrease from top to bottom, and multi-stage filtration treatment is performed through multiple filter meshes 32 with different filter pore sizes.

[0043] One end of the rotating sleeve 31 is fixedly connected to a rotating disk, and a guide pin 33 is eccentrically fixedly connected to the rotating disk. A lower limit groove 12 matching the guide pin 33 and an upper limit groove 13 located above the lower limit groove 12 are provided on the inner side wall of the filter cartridge 1. An oblique groove 14 and a reset groove 15 are respectively connected between the ends of the upper limit groove 13 and the lower limit groove 12.

[0044] When the guide pin 33 enters the upper limit slot 13 from the lower limit slot 12 via the oblique slot 14, the guide pin 33 is guided by the oblique slot 14, so that the rotating sleeve 31 carrying the plurality of filter screens 32 rotates 90 degrees, causing the filter screens 32 to change from horizontal to vertical. The upper limit slot 13 limits the guide pin 33, so that the filter screens 32 are maintained in a vertical state, so that the impurities filtered and intercepted on the filter screens 32 can be discharged, and the impurities filtered on the filter screens 32 fall into the impurity discharge channel 11 below and are discharged;

[0045] When the guide pin 33 enters the lower limit groove 12 from the upper limit groove 13 through the reset groove 15, the guide pin 33 no longer interferes with the reset rotation of the turntable when it is in the reset groove 15, so that the rotating sleeve 31 carrying the filter screen 32 can perform a 90° reverse reset rotation, thereby realizing the effective flipping operation of the filter screen 32 during the cyclic rotation process.

[0046] A transverse plate is fixedly connected to the top of the push column 41, and a support rod is fixedly connected between the transverse plate and the lifting plate. An electric push rod 44 is fixedly connected between the transverse plate and the filter cartridge 1. The electric push rod 44 pushes the transverse plate to move up and down, and the transverse plate carries the push column 41 to move up and down.

[0047] Example 2: Please refer to Figure 7 , Figure 8 and Fig.10 As shown, the problem of inconvenience in autonomous and efficient impurity removal can be solved by the following solutions:

[0048] In this embodiment, the rotating sleeve 31 is rotatably connected to a rotating rod 34 extending to the outside thereof, and a plurality of elastic knocking rods are fixedly connected to the rotating rod 34. A plurality of protrusions are fixedly connected to the annular inner wall of the rotating sleeve 31, and a gear 35 is fixedly connected to the rotating rod 34.

[0049] The rotating rod 34 carries a plurality of elastic knocking rods which rotate and knock the raised portion, causing the filter screen 32 to vibrate, thereby further accelerating the filtering efficiency of the exhaust gas treatment liquid, and separating the residual liquid in the impurities on the filter screen 32 between the liquid inlet pipe and the storage shell 16. In addition, the auxiliary cleaning brush 17 improves the cleaning effect of the impurities on the filter screen 32, further ensuring the efficient filtering effect of the exhaust gas treatment liquid.

[0050] A mounting plate is rotatably mounted on the push column 41 below the guide rod 42, and a tooth plate 43 meshing with the corresponding gear 35 is fixedly connected to the mounting plate, and the tooth plate 43 is slidably connected to the rotating seat 2. The push column 41 is combined with the mounting plate to carry multiple tooth plates 43 to move, so that the gear 35 meshing with the tooth plate 43 rotates, and the gear 35 drives the rotating rod 34 to rotate;

[0051] In addition, when the guide pin 33 is in the reset groove 15, combined with the rotation of the gear 35 driven by the tooth plate 43, the contact between the elastic knocking rod and the protrusion prompts the rotating sleeve 31 to carry the guide pin 33 to rotate synchronously, causing the filter screen 32 to change from vertical to horizontal reset movement, and through the deflection of the rotating seat 2, causing the guide pin 33 to enter the lower limit groove 12, maintaining the reset horizontal state of the filter screen 32, thereby increasing the linkage between the structures.

[0052] A storage shell 16 is fixedly connected to the top of the filter cartridge 1 and located above the upper limit slot 13, and a lifting plate is slidably connected inside the storage shell 16. A plurality of cleaning brushes 17 are fixedly connected to the bottom of the lifting plate, and enter the lower clearance slot 23 through the guide rod 42. The cleaning brushes 17 are synchronously inserted between adjacent filter screens 32 to clean impurities on the filter screens 32.

[0053] Before the rotating seat 2 is deflected, the cleaning brush 17 is located in the corresponding filter chamber 21 and moves. By pushing the reciprocating lifting motion of the push column 41, the cleaning brush 17 is driven to move between the filter screens 32, and combined with the continuous vibration of the filter screen 32, the efficient filtering effect of the filter chamber 21, the sufficient separation of impurities and residual liquid, and the sufficient automatic discharge of impurities are ensured.

[0054] Example 3: Please refer to Figure 1-Figure 10 As shown, the present invention also provides a method for using a circulating multi-stage filtering device for tail gas treatment liquid, comprising the following steps:

[0055] Step 1: Inject the exhaust gas treatment liquid into a filter cavity 21 on the rotating seat 2 through the liquid inlet pipe, and perform multi-stage filtering through multiple filter screens 32 with different filter hole sizes in the filter cavity 21 to filter and intercept impurities in the exhaust gas treatment liquid. During the filtering process, the injection impact of the exhaust gas treatment liquid combined with the V-shaped structure of the filter screen 32 causes the intercepted impurities to automatically move to the edge of the filter screen 32, ensuring rapid filtration of the filter cavity 21. The filtered exhaust gas treatment liquid flows to the bottom of the filter cartridge 1 and is then discharged through the liquid outlet pipe;

[0056] Step 2: The electric push rod 44 pushes the horizontal plate to move upward, and the horizontal plate drives the push column 41 and the combination of the support rod and the lifting plate to carry multiple cleaning brushes 17 to move upward. When the cleaning brush 17 moves out of the corresponding filter cartridge 1 and enters the storage shell 16, the guide rod 42 on the push column 41 enters the cam groove 22 from the corresponding give way groove 23, and then the push column 41 carries the guide rod 42 to move upward, combined with the guidance of the cam groove 22 on the guide rod 42, the rotating seat 2 is deflected once, and then the push column 41 carries the guide rod 42 to move downward, causing the rotating seat 2 to deflect twice, so that the next filter chamber 21 filters the injected exhaust gas treatment liquid;

[0057] Step 3: The push column 41 continues to move downward, firstly prompting the guide rod 42 to enter the corresponding give way groove 23 directly below, thereby limiting the rotation of the rotating seat 2, and the corresponding guide pins 33 in the upper limit groove 13 and the lower limit groove 12, thereby limiting the rotation of the rotating sleeve 31, and then the push column 41 is combined with the mounting plate to carry multiple tooth plates 43 to move, so that the gear 35 meshing with the tooth plate 43 rotates, and the gear 35 drives the rotating rod 34 to rotate, and the rotating rod 34 carries multiple elastic knocking rods to rotate and knock on the protrusion, so that the filter screen 32 vibrates, further accelerating the filtering efficiency of the exhaust gas treatment liquid, and separating the residual liquid in the impurities on the filter screen 32 between the liquid inlet pipe and the storage shell 16;

[0058] Step 4: Before the rotating seat 2 performs a deflection, the cleaning brush 17 moves in the corresponding filter chamber 21, and the reciprocating lifting and lowering motion of the driving column 41 causes continuous vibration during the filtering process, thereby ensuring the efficient filtering effect of the current filter chamber 21 and the sufficient separation of impurities and residual liquid;

[0059] Step 5: When the rotating seat 2 deflects once, the cleaning brush 17 moves upward in the storage shell 16, and the current filter chamber 21 rotates away from the storage shell 16. The guide pin 33 in the filter chamber 21 enters the lower limit groove 12 from the upper limit groove 13 through the reset groove 15. When the guide pin 33 is located in the reset groove 15, the rotating sleeve 31 can perform a 90° reset rotation. Combined with the rotation of the gear 35 driven by the tooth plate 43, the elastic knocking rod and the protrusion contact, so that the rotating sleeve 31 and the guide pin 33 are synchronously rotated, causing the filter screen 32 to reset from vertical to horizontal, and through the deflection of the rotating seat 2, the guide pin 33 enters the lower limit groove 12 to maintain the horizontal state of the filter screen 32;

[0060] Step 6: When the rotating seat 2 deflects for the second time, the cleaning brush 17 moves downward in the storage shell 16, and the next filter chamber 21 rotates in the direction close to the storage shell 16. The guide pin 33 in the filter chamber 21 enters the upper limit slot 13 from the lower limit slot 12 through the oblique slot 14. The guide pin 33 is guided by the oblique slot 14, so that the rotating sleeve 31 carrying multiple filter screens 32 rotates 90 degrees, causing the filter screens 32 to change from horizontal to vertical, and through the deflection of the rotating seat 2, the guide pin 33 moves in the lower limit slot 12 to maintain the vertical state of the filter screen 32;

[0061] Step seven: the impurities filtered on the filter screen 32 fall into the impurity discharge channel 11 below, and then enter the yield groove 23 below through the guide rod 42. The cleaning brush 17 is synchronously inserted between the adjacent filter screens 32 to clean the impurities on the filter screen 32. With the help of the vertical state locking of the filter screen 32 and the rotation of the rotating rod 34, the impurities on the vertical state filter screen 32 are auxiliaryly vibrated and cleaned. Repeat the above steps, and perform multi-stage filtration treatment on the exhaust gas treatment liquid one by one through multiple filter chambers 21 to maintain high filtration efficiency and discharge impurities simultaneously during filtration. The exhaust gas treatment liquid is injected into the filter cartridge 1, and the liquid inlet pipe is connected to the liquid outlet pipe through the connecting pipe and the circulating pump, so that the exhaust gas treatment liquid can be circulated and filtered.

[0062] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A circulating multi-stage filtering device for tail gas treatment liquid, comprising a filter cartridge (1), and a rotating seat (2) rotatably mounted on the top of the filter cartridge (1), and a plurality of filter chambers (21) are formed through the rotating seat (2), characterized in that: A multi-stage filter assembly (3) is provided in the filter chamber (21), and a driving assembly (4) for driving the rotating seat (2) to rotate intermittently is provided on the filter cartridge (1); The multi-stage filter assembly (3) comprises a rotating sleeve (31) which is rotatably mounted in a filter cavity (21) and is turned over in cooperation with a rotating seat (2), and a plurality of equidistantly distributed filter screens (32) are mounted on the rotating sleeve (31) via a connecting frame. The pushing assembly (4) comprises a pushing column (41) which is slidably mounted on the filter cartridge (1), and a plurality of guide rods (42) are mounted on the annular side wall of the pushing column (41). A cam groove (22) which cooperates with the guide rod (42) is formed on the annular inner wall of the rotating seat (2), and a clearance groove (23) which cooperates with the corresponding guide rod (42) is formed at an equal distance at the bottom of the cam groove (22).

2. A circulating multi-stage filtering device for tail gas treatment liquid according to claim 1, characterized in that: The top and bottom sides of the filter cartridge (1) are respectively fixedly connected with a liquid inlet pipe and a liquid outlet pipe, and the bottom of the filter cartridge (1) is fixedly connected with a debris removal channel (11) rotatably connected to the rotating seat (2).

3. The circulating multi-stage filtering device for tail gas treatment liquid according to claim 1, characterized in that: The middle part of the filter cavity (21) is in a spherical cavity structure, and the plurality of filter screens (32) form a spherical structure matching the spherical cavity. The cross section of the filter screen (32) is in a V-shaped structure, and the filter hole sizes of the plurality of filter screens (32) decrease from top to bottom.

4. The circulating multi-stage filtering device for tail gas treatment liquid according to claim 1, characterized in that: One end of the rotating sleeve (31) is fixedly connected to a rotating disk, and a guide pin (33) is eccentrically fixedly connected to the rotating disk. A lower limit groove (12) matching with the guide pin (33) and an upper limit groove (13) located above the lower limit groove (12) are provided on the inner side wall of the filter cartridge (1). An oblique groove (14) and a reset groove (15) are respectively connected between the ends of the upper limit groove (13) and the lower limit groove (12).

5. The circulating multi-stage filtering device for tail gas treatment liquid according to claim 1, characterized in that: The rotating sleeve (31) is rotatably connected to a rotating rod (34) extending to the outside thereof, and the rotating rod (34) is fixedly connected to a plurality of elastic knocking rods. A plurality of protrusions are fixedly connected to the annular inner wall of the rotating sleeve (31), and a gear (35) is fixedly connected to the rotating rod (34).

6. A circulating multi-stage filtering device for tail gas treatment liquid according to claim 5, characterized in that: A mounting plate is rotatably mounted on the push column (41) below the guide rod (42), a toothed plate (43) meshing with a corresponding gear (35) is fixedly connected to the mounting plate, and the toothed plate (43) is slidably connected to the rotating seat (2).

7. The circulating multi-stage filtering device for tail gas treatment liquid according to claim 4, characterized in that: A storage shell (16) is fixedly connected to the top of the filter cartridge (1) and located above the upper limit slot (13), and a lifting plate is slidably connected inside the storage shell (16), and a plurality of cleaning brushes (17) are fixedly connected to the bottom of the lifting plate.

8. The circulating multi-stage filtering device for tail gas treatment liquid according to claim 7, characterized in that: A transverse plate is fixedly connected to the top of the push column (41), a support rod is fixedly connected between the transverse plate and the lifting plate, and an electric push rod (44) is fixedly connected between the transverse plate and the filter cartridge (1).

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