Sewage treatment device for cement preparation

Abstract

The invention discloses a sewage treatment device for cement preparation, and relates to the technical field related to sewage treatment.The sewage treatment device is provided with two sets of movable filter screens, when one filter screen is blocked, the filter screen is pushed to move by means of resistance increased after blockage, then a water inlet pipeline is automatically switched, and the other filter screen is used for filtering; meanwhile, the original filter screens are subjected to backwashing cleaning, then the two filter screens work alternately in sequence, low efficiency and energy consumption caused by traditional manual cleaning or shutdown cleaning are avoided, in addition, due to the design of the propellers, the filter screens can reset automatically after cleaning is completed, the blow-off pipe is closed, the overall efficiency is further improved, and waste of water resources is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field related to sewage treatment, and in particular to a sewage treatment device for cement preparation. Background Art

[0002] In the process of cement preparation and production, the generation of a large amount of industrial wastewater has become an environmental issue that cannot be ignored. The wastewater generated in the production process contains pollutants such as cement dust, mineral particles, alkaline substances and suspended solids. If it is directly discharged without effective treatment, it will not only cause scaling and blockage of equipment pipes, but also cause environmental problems such as soil compaction and water pollution.

[0003] According to statistics, about 300-500 cubic meters of wastewater is generated for every 10,000 tons of cement produced. Efficient sewage treatment equipment has become an indispensable environmental protection equipment for cement production lines. Its operating stability is directly related to the company's environmental compliance and water resource recycling efficiency.

[0004] Traditional cement plants generally use fixed filter screen filtration devices. Such equipment is usually equipped with a single-layer stainless steel filter screen or a ceramic filter element to treat sewage by physical interception. The existing technology has a prominent problem, that is, when the filter screen is blocked, the machine needs to be shut down for cleaning or replacement, which will cause production line interruptions. The average monthly downtime for maintenance can reach 8-12 hours, which will greatly reduce production efficiency. In addition, some improved devices have backwashing functions, but backwashing relies on electric water pumps. The failure rate is high under high dust conditions in cement plants, and an additional backwashing water pump system is required. Summary of the invention

[0005] The object of the present invention is to provide a sewage treatment device for cement preparation to solve the problem that the traditional filtering device mentioned in the above background needs to be shut down for cleaning.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a sewage treatment device for cement preparation, comprising a filter cartridge, one side of the filter cartridge is fixedly connected to a first water inlet pipe and a second water inlet pipe, the other side of the filter cartridge is fixedly connected to a water outlet pipe, the first water inlet pipe and the second water inlet pipe are symmetrically distributed, the water outlet pipe is located between the first water inlet pipe and the second water inlet pipe, and the first water inlet pipe and the second water inlet pipe are connected to a sewage water inlet pipe through a tee; A central shaft runs through the filter cartridge, the central shaft is rotatably connected to the filter cartridge, and the central shaft is movably connected to a first movable filter screen and a second movable filter screen; The center of the first movable filter is movably connected to a first center wheel through a first ratchet mechanism, a first spiral groove is provided on the center shaft, the first center wheel is slidably connected to the first spiral groove, both sides of the first center wheel are fixedly connected to a first propeller and a first movable magnet disk through a first positioning pin, and a first fixed magnet disk is fixedly connected to the center shaft; The center of the second movable filter is movably connected to a second center wheel through a second ratchet mechanism, a second spiral groove is provided on the center shaft, the second center wheel is slidably connected to the second spiral groove, a second propeller and a second movable magnet disk are fixedly connected to both sides of the second center wheel through second positioning pins, and a second fixed magnet disk is fixedly connected to the center shaft; A first blocking disc and a second blocking disc are fixedly connected to the central axis. The first blocking disc is opposite to the first water inlet pipe outlet, and the second blocking disc is opposite to the second water inlet pipe outlet.

[0007] In one example, a sliding guide rail is provided on the inner wall of the filter cartridge, a first positioning groove is provided on the outer frame of the first movable filter screen, and a second positioning groove is provided on the outer frame of the second movable filter screen. The first movable filter screen slides in cooperation with the sliding guide rail via the first positioning groove, and the second movable filter screen slides in cooperation with the sliding guide rail via the second positioning groove.

[0008] In one example, the first movable filter is located between the first water inlet pipe and the water outlet pipe, and the second movable filter is located between the water outlet pipe and the second water inlet pipe.

[0009] In one example, the first ratchet mechanism includes a first sealing cover, which is engaged with the first movable filter, the first center wheel is rotatably connected to the first sealing cover, the first center wheel is fixedly connected with the first ratchet teeth around it, the first engaging teeth are rotatably connected inside the first sealing cover, the first engaging teeth are engaged with the first ratchet teeth, and a first spring is arranged between the first engaging teeth and the outer wall of the first sealing cover.

[0010] In one example, the second ratchet mechanism includes a second sealing cover, which is engaged with the second movable filter, the second center wheel is rotatably connected to the second sealing cover, the second center wheel is fixedly connected with second ratchet teeth around it, the second sealing cover is rotatably connected with second engaging teeth, the second engaging teeth are engaged with the second ratchet teeth, and a second spring is arranged between the second engaging teeth and the outer wall of the second sealing cover.

[0011] In one example, the first movable magnet disk is fixedly connected to the first cleaning brush via threads on its periphery, and the second movable magnet disk is fixedly connected to the second cleaning brush via threads on its periphery.

[0012] In one example, the first fixed magnet disk is located at one end of the first spiral groove close to the first water inlet pipe, the first movable magnet disk and the first fixed magnet disk attract each other, the second fixed magnet disk is located at one end of the second spiral groove close to the second water inlet pipe, and the second movable magnet disk and the second fixed magnet disk attract each other.

[0013] In one example, a first connecting rod is fixedly connected to the edge of the first movable filter, a first sealing plug is fixedly connected to one end of the first connecting rod, a first sewage outlet is opened at one end of the filter cartridge, and the first sealing plug is opposite to the first sewage outlet.

[0014] In one example, a second connecting rod is fixedly connected to the edge of the second movable filter screen, a second sealing plug is fixedly connected to one end of the second connecting rod, a second sewage outlet is opened at the other end of the filter cartridge, and the second sealing plug is opposite to the second sewage outlet.

[0015] In one example, there is an angle between the first sealing disk and the second sealing disk, and the angle between the first sealing disk and the second sealing disk is consistent with the rotation angle of the center axis during the complete sliding stroke of the first center wheel along the first spiral groove, and the angle between the first sealing disk and the second sealing disk is also consistent with the rotation angle of the center axis during the complete sliding stroke of the second center wheel along the second spiral groove.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention proposes a sewage treatment device for cement preparation, which is provided with two sewage inlet pipes, which are connected to the same sewage inlet pipe through a tee, and the device is provided with two movable first and second movable filter screens. The sewage injected from the two sewage inlet pipes is filtered through the two filter screens respectively and then flows out through the outlet pipe, and only one sewage pipe can enter at the same time, so only one filter screen is filtering at the same time. When the filter screen is blocked, the resistance increases. When the resistance increases to a set value, the magnet will be separated from the adsorption, thereby pushing the filter screen to move. In this way, the movement of the filter screen can be used to switch the opening and closing of the two water inlet pipes, so that the other sewage inlet pipe is opened and the original sewage inlet pipe is closed. The pipe is closed, and one of the sewage outlets is opened at the same time. After the sewage is filtered through the unblocked filter, part of it flows out from the outlet pipe, and the other part backwashes the blocked filter to clean the blockage on the filter, so that the blockage is discharged from the opened sewage outlet. As the blockage on the filter decreases, the resistance of the filter decreases, and the water flow through the filter gradually increases, which in turn drives the propeller on one side of the filter to rotate, driving the cleaning brush to rotate and brush the filter. At the same time, the propeller rotation is used to drive the blocked filter to return to its original position. After the filter returns to its original position, the sewage outlet will be closed, so the filtered water can only flow out through the outlet pipe, and the backwashed filter will be ready for use. When the second filter is blocked again, the above process is repeated. The present invention has the following beneficial effects: 1. Automatic switching and cleaning function: Through the cleverly designed filter resistance sensing and movement mechanism, the device can automatically sense the filter blockage and automatically switch the water inlet pipe to achieve backwashing of the blocked filter. This process does not require human intervention, greatly improving the continuity and automation of sewage treatment and reducing operating costs.

[0017] 2. High efficiency and energy saving: When the filter is clogged, the device can quickly switch to the backup water inlet pipe to ensure uninterrupted sewage treatment. At the same time, part of the water output from the unblocked filter is used to backwash the blocked filter, effectively removing the blockage and avoiding the inefficiency and energy consumption of traditional manual cleaning or shutdown cleaning. In addition, the propeller design enables the filter to automatically reset after cleaning and close the sewage pipe, further improving the overall efficiency and reducing water waste.

[0018] 3. Easy maintenance: Since the device has an automatic cleaning function, the frequency and difficulty of manual maintenance are greatly reduced, the service life of the filter is extended, and the maintenance cost is reduced. At the same time, the simple structural design makes inspection and maintenance work more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the appearance structure of the sewage treatment device of the present invention; Figure 2 The cross-sectional structure of the filter cartridge of the present invention is shown in FIG. Figure 1 ; Figure 3 The cross-sectional structure of the filter cartridge of the present invention is shown in FIG. Figure 2 ; Figure 4 For the present invention Figure 3 The enlarged structural diagram at A in the middle; Figure 5 This is a schematic diagram of the structure of the first movable filter screen of the present invention; Figure 6 This is a schematic diagram of the structure of the second movable filter screen of the present invention; Figure 7 It is a schematic structural diagram of the first ratchet mechanism of the present invention; Figure 8 For the present invention Figure 7 The enlarged structural diagram at B in the middle; Fig. 9 It is a schematic diagram of the structure of the second ratchet mechanism of the present invention; Fig.10 For the present invention Fig. 9 The enlarged structural diagram at C in the middle; Fig.11 The cross-sectional structure of the filter cartridge of the present invention is shown in FIG. Figure 3 .

[0020] Numbers in the figure: 1, filter cartridge; 2, first water inlet pipe; 3, second water inlet pipe; 4, water outlet pipe; 5, sewage inlet pipe; 6, central axis; 7, first movable filter; 701, first positioning slide groove; 8, second movable filter; 801, second positioning slide groove; 9, sliding guide rail; 10, first ratchet mechanism; 1001, first sealing cover; 1002, first ratchet; 1003, first engaging tooth; 1004, first spring; 11, first central wheel; 12, first spiral groove; 13, first positioning pin; 14, first propeller; 15, first movable magnet disk; 16, first cleaning brush; 17. First fixed magnet disk; 18. First connecting rod; 19. First sealing plug; 20. First sewage outlet; 21. Second ratchet mechanism; 2101. Second sealing cover; 2102. Second ratchet; 2103. Second engaging tooth; 2104. Second spring; 22. Second center wheel; 23. Second spiral groove; 24. Second positioning pin; 25. Second propeller; 26. Second movable magnet disk; 27. Second cleaning brush; 28. Second fixed magnet disk; 29. ​​Second connecting rod; 30. Second sealing plug; 31. Second sewage outlet; 32. First sealing disk; 33. Second sealing disk. DETAILED DESCRIPTION

[0021] 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.

[0022] Example 1: Figure 1-10 As shown, a sewage treatment device for cement preparation includes a filter cartridge 1, one side of the filter cartridge 1 is fixedly connected to a first water inlet pipe 2 and a second water inlet pipe 3, the other side of the filter cartridge 1 is fixedly connected to a water outlet pipe 4, the first water inlet pipe 2 and the second water inlet pipe 3 are symmetrically distributed, the water outlet pipe 4 is located between the first water inlet pipe 2 and the second water inlet pipe 3, the first water inlet pipe 2 and the second water inlet pipe 3 are connected to a sewage inlet pipe 5 through a tee, a central axis 6 runs through the filter cartridge 1, the central axis 6 is rotatably connected to the filter cartridge 1, and the central axis 6 is movably connected to a first movable filter screen 7 and a second movable filter screen 8.

[0023] Specifically, the first movable filter 7 is located between the first water inlet pipe 2 and the water outlet pipe 4, and the second movable filter 8 is located between the water outlet pipe 4 and the second water inlet pipe 3. In this way, when the first water inlet pipe 2 is opened, the sewage will be filtered through the first movable filter 7 and then flow out through the water outlet pipe 4. When the second water inlet pipe 3 is opened, the sewage will be filtered through the second movable filter 8 and then flow out through the water outlet pipe 4.

[0024] The center of the first movable filter 7 is movably connected to the first center wheel 11 through the first ratchet mechanism 10, the first ratchet mechanism 10 includes a first sealing cover 1001, the first sealing cover 1001 is engaged with the first movable filter 7, the first center wheel 11 is rotatably connected to the first sealing cover 1001, the first center wheel 11 is fixedly connected with the first ratchet 1002 on all sides, the first sealing cover 1001 is rotatably connected with the first engaging tooth 1003, the first engaging tooth 1003 and the first ratchet 1002 are engaged with each other, and a first spring 1004 is arranged between the first engaging tooth 1003 and the outer wall of the first sealing cover 1001, so that the center shaft 6 can be driven to rotate only when the first movable filter 7 moves in one direction, and the center shaft 6 will not be driven to rotate when the first movable filter 7 returns to its original position.

[0025] The first propeller 14 and the first movable magnet disk 15 are fixedly connected to both sides of the first central wheel 11 through the first positioning pins 13 respectively, and the first fixed magnet disk 17 is fixedly connected to the central shaft 6, and the first fixed magnet disk 17 performs magnetic positioning on the first movable magnet disk 15; The center of the second movable filter 8 is movably connected to the second center wheel 22 through the second ratchet mechanism 21, the second ratchet mechanism 21 includes a second sealing cover 2101, the second sealing cover 2101 is engaged with the second movable filter 8, the second center wheel 22 is rotatably connected to the second sealing cover 2101, the second center wheel 22 is fixedly connected with second ratchet teeth 2102 on all sides, the second sealing cover 2101 is rotatably connected with second engaging teeth 2103, the second engaging teeth 2103 and the second ratchet teeth 2102 are interlocked, and a second spring 2104 is arranged between the second engaging teeth 2103 and the outer wall of the second sealing cover 2101, so that the center shaft 6 can be driven to rotate only when the second movable filter 8 moves in one direction, and the center shaft 6 will not be driven to rotate when the second movable filter 8 returns to its original position.

[0026] The second propeller 25 and the second movable magnet disk 26 are fixedly connected to the second central wheel 22 on both sides through the second positioning pins 24 respectively. The second fixed magnet disk 28 is fixedly connected to the central shaft 6. The second fixed magnet disk 28 performs magnetic positioning on the second movable magnet disk 26.

[0027] A first sealing disk 32 and a second sealing disk 33 are fixedly connected to the central shaft 6. The first sealing disk 32 is opposite to the outlet of the first water inlet pipe 2, and the second sealing disk 33 is opposite to the outlet of the second water inlet pipe 3. There is an angle between the first sealing disk 32 and the second sealing disk 33, and the angle between the first sealing disk 32 and the second sealing disk 33 is consistent with the rotation angle of the central shaft 6 in the complete sliding stroke of the first center wheel 11 along the first spiral groove 12. The angle between the first sealing disk 32 and the second sealing disk 33 is also consistent with the rotation angle of the central shaft 6 in the complete sliding stroke of the second center wheel 22 along the second spiral groove 23. Therefore, when the first movable filter 7 and the second movable filter 8 are pushed, the central shaft 6 will be driven to rotate. When the first movable filter 7 and the second movable filter 8 are pushed to the extreme end of the first spiral groove 12 or the second spiral groove 23, the first sealing disk 32 and the second sealing disk 33 just complete the position change, so that the original state of the first water inlet pipe 2 being open and the second water inlet pipe 3 being closed is transformed into the state of the second water inlet pipe 3 being open and the first water inlet pipe 2 being closed.

[0028] The edge of the first movable filter screen 7 is fixedly connected to a first connecting rod 18, one end of the first connecting rod 18 is fixedly connected to a first sealing plug 19, one end of the filter cartridge 1 is provided with a first sewage outlet 20, the first sealing plug 19 is opposite to the first sewage outlet 20, the edge of the second movable filter screen 8 is fixedly connected to a second connecting rod 29, one end of the second connecting rod 29 is fixedly connected to a second sealing plug 30, the other end of the filter cartridge 1 is provided with a second sewage outlet 31, the second sealing plug 30 is opposite to the second sewage outlet 31, so that when the first movable filter screen When 7 is blocked and pushed by water flow, the first sewage outlet 20 on its outer side will be opened, so that the water flow will backwash the first movable filter 7, and then the filter residue will be discharged from the first sewage outlet 20. When the filter residue on the first movable filter 7 is gradually peeled off, the water flow passing through the first movable filter 7 increases, which will push the first propeller 14 to rotate, and then drive the first movable filter 7 to return to its original position. At this time, the first sewage outlet 20 is blocked again, thereby stopping the flushing of the first movable filter 7, and the same is true for the second movable filter 8.

[0029] Specifically, a sliding guide rail 9 is provided on the inner wall of the filter cylinder 1, a first positioning groove 701 is provided on the outer frame of the first movable filter screen 7, and a second positioning groove 801 is provided on the outer frame of the second movable filter screen 8. The first movable filter screen 7 slides with the sliding guide rail 9 through the first positioning groove 701, and the second movable filter screen 8 slides with the sliding guide rail 9 through the second positioning groove 801, so that when the first movable filter screen 7 and the second movable filter screen 8 slide along the sliding guide rail 9, they themselves will not rotate, and a first spiral groove 12 is provided on the central shaft 6, and the first center wheel 11 is slidably connected to the first spiral groove 12, and a second spiral groove 23 is provided on the central shaft 6, and the second center wheel 22 is slidably connected to the second spiral groove 23, so that when the first movable filter screen 7 and the second movable filter screen 8 slide along the sliding guide rail 9, both will drive the central shaft 6 to rotate.

[0030] Specifically, the first fixed magnet disk 17 is located at one end of the first spiral groove 12 close to the first water inlet pipe 2, the first movable magnet disk 15 and the first fixed magnet disk 17 attract each other, the second fixed magnet disk 28 is located at one end of the second spiral groove 23 close to the second water inlet pipe 3, and the second movable magnet disk 26 and the second fixed magnet disk 28 attract each other. Therefore, when the first movable filter screen 7 or the second movable filter screen 8 is not blocked, the thrust of the water flow on the first movable filter screen 7 or the second movable filter screen 8 is small. When the first movable filter screen 7 or the second movable filter screen 8 is gradually blocked, the resistance to the water flow will increase, and thus the driving force of the water flow on the first movable filter screen 7 or the second movable filter screen 8 will gradually increase, until the first movable filter screen 7 or the second movable filter screen 8 is blocked to a certain extent, resulting in the thrust of the water flow being greater than the suction force between the magnets, which will push the first movable filter screen 7 or the second movable filter screen 8.

[0031] Embodiment 2: The first movable magnet disk 15 is fixedly connected with the first cleaning brush 16 by threads on all sides, and the second movable magnet disk 26 is fixedly connected with the second cleaning brush 27 by threads on all sides. When water flows through the blocked first movable filter 7 and second movable filter 8, the first propeller 14 and the second propeller 25 will drive the first cleaning brush 16 and the second cleaning brush 27 respectively to brush the first movable filter 7 and the second movable filter 8.

[0032] Working principle: First, in the initial state, the first blocking plate 32 is offset from the first water inlet pipe 2, and the second blocking plate 33 blocks the second water inlet pipe 3. The water flow of the sewage inlet pipe 5 can only enter the filter cartridge 1 through the first water inlet pipe 2, and then is filtered by the first movable filter screen 7 and discharged from the outlet pipe 4. When the first movable filter screen 7 is gradually blocked, the driving force of the water flow on the first movable filter screen 7 gradually increases, until the thrust is greater than the attraction between the first movable magnet disk 15 and the first fixed magnet disk 17, the first movable magnet disk 15 and the first fixed magnet disk 17 will separate, and the first movable filter screen 7 will be pushed. Since the first movable filter screen 7 slides linearly along the sliding guide rail 9, it cannot rotate by itself, and the first movable filter screen 7 and the first center wheel 11 are stuck through the first ratchet mechanism 10, and then it will pass through the first center wheel 11 The cooperation with the first spiral groove 12 drives the central shaft 6 to rotate, so that the first sealing disk 32 blocks the first water inlet pipe 2, and the second water inlet pipe 3 is opened. At the same time, the movement of the first movable filter screen 7 will also drive the first sealing plug 19 to open the first sewage outlet 20. At this time, the sewage enters through the second water inlet pipe 3, is filtered by the second movable filter screen 9, and is discharged from the outlet pipe 4. At the same time, due to the opening of the first sewage outlet 20, part of the water flow will pass through the first movable filter screen 7, and the first movable filter screen 7 will be backwashed and the filter residue will be carried away. The first sewage outlet 20 flows out, which will cause the blockage of the first movable filter 7 to be gradually cleaned up. As the blockage decreases, the water flow through the first movable filter 7 will gradually increase, and the increased water flow will begin to push the first propeller 14 to rotate. On the one hand, the first propeller 14 drives the first cleaning brush 16 to rotate to scrub the first movable filter 7. On the other hand, the first propeller 14 drives the first center wheel 11 to rotate. The first center wheel 11 rotates relative to the first movable filter 7 through the first ratchet mechanism 10, and then drives the first movable filter 7 to return to its position through the cooperation of the first center wheel 11 and the first spiral groove 12. Until the first movable filter 7 moves to a certain position, the first movable magnet disk 15 and the first fixed magnet disk 17 will quickly attract each other, and then drive the first sealing plug 19 to close the first sewage outlet 20. At this time, the backwashing of the first movable filter 7 is stopped, and all the water is discharged through the outlet pipe 4. After the second movable filter 9 is blocked again, repeat the above process to complete the switching of the filter and the cleaning of the blocked filter.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sewage treatment device for cement production, characterized in that: It comprises a filter cartridge, one side of which is fixedly connected to a first water inlet pipe and a second water inlet pipe, and the other side of which is fixedly connected to a water outlet pipe, the first water inlet pipe and the second water inlet pipe are symmetrically distributed, the water outlet pipe is located between the first water inlet pipe and the second water inlet pipe, and the first water inlet pipe and the second water inlet pipe are connected to a sewage inlet pipe through a tee; A central shaft runs through the filter cartridge, the central shaft is rotatably connected to the filter cartridge, and the central shaft is movably connected to a first movable filter screen and a second movable filter screen; The center of the first movable filter is movably connected to a first center wheel through a first ratchet mechanism, a first spiral groove is provided on the center shaft, the first center wheel is slidably connected to the first spiral groove, both sides of the first center wheel are fixedly connected to a first propeller and a first movable magnet disk through a first positioning pin, and a first fixed magnet disk is fixedly connected to the center shaft; The center of the second movable filter is movably connected to a second center wheel through a second ratchet mechanism, a second spiral groove is provided on the center shaft, the second center wheel is slidably connected to the second spiral groove, a second propeller and a second movable magnet disk are fixedly connected to both sides of the second center wheel through second positioning pins, and a second fixed magnet disk is fixedly connected to the center shaft; A first blocking disc and a second blocking disc are fixedly connected to the central axis. The first blocking disc is opposite to the first water inlet pipe outlet, and the second blocking disc is opposite to the second water inlet pipe outlet.

2. The sewage treatment device for cement production according to claim 1, characterized in that: A sliding guide rail is arranged on the inner wall of the filter cylinder, a first positioning groove is opened on the outer frame of the first movable filter screen, a second positioning groove is opened on the outer frame of the second movable filter screen, the first movable filter screen slides with the sliding guide rail through the first positioning groove, and the second movable filter screen slides with the sliding guide rail through the second positioning groove.

3. The sewage treatment device for cement production according to claim 1, characterized in that: The first movable filter screen is located between the first water inlet pipe and the water outlet pipe, and the second movable filter screen is located between the water outlet pipe and the second water inlet pipe.

4. The sewage treatment device for cement production according to claim 1, characterized in that: The first ratchet mechanism includes a first sealing cover, which is engaged with the first movable filter, the first center wheel is rotatably connected to the first sealing cover, the first center wheel is fixedly connected with first ratchet teeth around, the first sealing cover is rotatably connected with first engaging teeth, the first engaging teeth are engaged with the first ratchet teeth, and a first spring is arranged between the first engaging teeth and the outer wall of the first sealing cover.

5. The sewage treatment device for cement production according to claim 1, characterized in that: The second ratchet mechanism includes a second sealing cover, which is engaged with the second movable filter, the second center wheel is rotatably connected to the second sealing cover, the second center wheel is fixedly connected with second ratchet teeth around it, the second sealing cover is rotatably connected with second engaging teeth, the second engaging teeth are engaged with the second ratchet teeth, and a second spring is arranged between the second engaging teeth and the outer wall of the second sealing cover.

6. The sewage treatment device for cement production according to claim 1, characterized in that: The first movable magnet disk is fixedly connected with a first cleaning brush via threads on its periphery, and the second movable magnet disk is fixedly connected with a second cleaning brush via threads on its periphery.

7. The sewage treatment device for cement production according to claim 1, characterized in that: The first fixed magnet disk is located at one end of the first spiral groove close to the first water inlet pipe, the first movable magnet disk and the first fixed magnet disk attract each other, the second fixed magnet disk is located at one end of the second spiral groove close to the second water inlet pipe, and the second movable magnet disk and the second fixed magnet disk attract each other.

8. The sewage treatment device for cement production according to claim 1, characterized in that: The edge of the first movable filter is fixedly connected with a first connecting rod, one end of the first connecting rod is fixedly connected with a first sealing plug, one end of the filter cartridge is provided with a first sewage outlet, and the first sealing plug is opposite to the first sewage outlet.

9. The sewage treatment device for cement production according to claim 1, characterized in that: The edge of the second movable filter is fixedly connected with a second connecting rod, one end of the second connecting rod is fixedly connected with a second sealing plug, the other end of the filter cartridge is provided with a second sewage outlet, and the second sealing plug is opposite to the second sewage outlet.

10. The sewage treatment device for cement production according to claim 1, characterized in that: There is an angle between the first sealing disk and the second sealing disk, and the angle between the first sealing disk and the second sealing disk is consistent with the rotation angle of the center axis during the complete sliding stroke of the first center wheel along the first spiral groove. The angle between the first sealing disk and the second sealing disk is also consistent with the rotation angle of the center axis during the complete sliding stroke of the second center wheel along the second spiral groove.

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