A multi-stage treatment device for printing and dyeing wastewater

Abstract

The present invention discloses a multi-stage treatment device for printing and dyeing wastewater, which includes a filtration tank and a sedimentation tank. An annular baffle is fixedly connected to the filtration tank, a support frame is fixedly connected inside the annular baffle, a mounting frame is fixedly connected to the left side of the top of the annular baffle, a water inlet elbow is inserted on the mounting frame, an auxiliary filtration mechanism is arranged inside the filtration tank, the left side of the bottom of the filtration tank is communicated with a water passing frame, a water pump is arranged on one side of the sedimentation tank and the water inlet end of the water pump is communicated with the water passing frame. By using the auxiliary filtration mechanism, the present invention can quickly swap the positions of the clean filter cartridge and the filter cartridge with blocked meshes. The new filter cartridge can continue to filter the impurities in the printing and dyeing wastewater. The entire swapping process does not require shutdown and will not affect the treatment efficiency of the printing and dyeing wastewater. Subsequently, the user can draw out the filter cartridge with blocked meshes from the corresponding fixed cylinder for cleaning.

Description

Technical Field

[0001] The present invention relates to the technical field of wastewater treatment, and particularly to a multi-stage treatment device for printing and dyeing wastewater. Background Technique

[0002] Wastewater treatment is to treat wastewater by physical, chemical and biological methods to purify the wastewater, reduce pollution, so as to achieve wastewater recycling and reuse, and make full use of water resources. During the printing and dyeing process, a lot of printing and dyeing wastewater will be generated. Users need to use a multi-stage treatment device to classify and treat the printing and dyeing wastewater, filter out the impurities in the printing and dyeing wastewater in advance, then use chemicals to adjust the pH value of the wastewater, and then use the flocculation method to flocculate and precipitate the impurities in the printing and dyeing wastewater.

[0003] However, during the process of removing impurities from printing and dyeing wastewater, the impurities will continuously adhere to the filter screen or filter cylinder and block the mesh holes, which will affect the filtering effect of the wastewater. Users have to stop the machine for a long time to clean the impurities adhering to the filter screen or filter cylinder, greatly reducing the working efficiency of the device. Therefore, a multi-stage treatment device for printing and dyeing wastewater is proposed. Summary of the Invention

[0004] The purpose of the present invention is to provide a multi-stage treatment device for printing and dyeing wastewater to solve the problem that users have to stop the machine for a long time to clean the impurities adhering to the filter screen or filter cylinder, which greatly reduces the working efficiency of the device as mentioned in the above background technique.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A multi-stage treatment device for printing and dyeing wastewater, including a filtration tank and a sedimentation tank. An annular baffle is fixedly connected to the filtration tank. A support frame is fixedly connected inside the annular baffle. The left side of the top of the annular baffle is fixedly connected with a mounting frame. An inlet elbow is inserted into the mounting frame. An auxiliary filtration mechanism is arranged inside the filtration tank. The left side of the bottom of the filtration tank is communicated with a water passing frame. A water pump is arranged on one side of the sedimentation tank, and the inlet end of the water pump is communicated with the water passing frame. The outlet end of the water pump is communicated with a drain pipe, and one end of the drain pipe is communicated with the left side of the top of the sedimentation tank. Both sides of the bottom of the sedimentation tank are communicated with sewage pipes, and valves are arranged on the sewage pipes. A chemical inlet pipe and a fixed pipe are sequentially communicated with the sedimentation tank in the left-right direction. A controller is fixedly connected to the front of the mounting frame.

[0006] Preferably, the auxiliary filtering mechanism includes a plurality of telescopic columns symmetrically and fixedly connected to the annular baffle and the support frame in the front-rear direction. A moving plate used in cooperation with the water inlet elbow is fixedly connected to the telescopic columns. A first spring is sleeved on the water inlet elbow, and both ends of the first spring are respectively fixedly connected to the top of the moving plate and the top of the inner cavity of the mounting frame. A connecting plate is longitudinally connected to the adjacent sides of two of the telescopic columns. A first motor is fixedly connected to the right side of the connecting plate through a first bracket. The output end of the first motor penetrates through the connecting plate and is fixedly connected to a cam used in cooperation with the moving plate. A second motor is fixedly connected to the support frame through a second bracket. The output end of the second motor penetrates through the support frame and is fixedly connected to a cross connecting frame, and the bottom end of the cross connecting frame is rotatably installed on the right side of the bottom of the inner cavity of the filtering tank. Fixed cylinders are fixedly connected to the four sides of the cross connecting frame. A filtering cylinder is arranged in the fixed cylinder, and the top of the filtering cylinder is movably connected to the bottom of the annular baffle and the support frame. One end of the water inlet elbow extends into one of the filtering cylinders.

[0007] Preferably, a limiting ring is fixedly connected to the surface of the filtering cylinder. A positioning ring is fixedly connected in the fixed cylinder. Second springs are fixedly connected to the four sides of the top of the positioning ring. The top ends of the second springs are fixedly connected to a moving ring, and the moving ring is slidably arranged in the fixed cylinder. The top of the moving ring is attached to the bottom of the limiting ring.

[0008] Preferably, a notch used in cooperation with the filtering cylinder is formed in the front surface of the annular baffle. An arc-shaped groove used in cooperation with the filtering cylinder is formed in the support frame.

[0009] Preferably, a rotating shaft is rotatably installed on the front surface of the top of the filtering tank. An activity seat is fixedly connected to the top end of the rotating shaft, and a pressing plate is rotatably connected in the activity seat. Two sets of pressing wheels are symmetrically and fixedly connected to the bottom of the pressing plate in the front-rear direction, and the bottoms of the pressing wheels are attached to one of the filtering cylinders. A clamping seat used in cooperation with the pressing plate is fixedly connected to the support frame.

[0010] Preferably, a flow meter is arranged on the water passing frame. A liquid level sensor is arranged at one end of the water inlet elbow located in the filtering cylinder. Alarm devices are fixedly connected to the top of the front and back surfaces of the mounting frame.

[0011] Preferably, an auxiliary frame used in cooperation with the water inlet elbow is fixedly connected to the left side of the top of the annular baffle. A locking ring is fixedly connected to the water inlet elbow, and the bottom of the locking ring is attached to the auxiliary frame.

[0012] Preferably, a lead screw is threadedly connected to one side of the top of the clamping seat through a threaded sleeve, and the bottom end of the lead screw is inserted into the bottom of the inner cavity of the clamping seat. The left side of the lead screw is movably connected to the right side of the pressing plate.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. In the present invention, by providing an auxiliary filtering mechanism, using the first motor as the driving source, and with the assistance of a cam, one end of the water inlet elbow can be completely separated from the filter cylinder. At the same time, using the second motor as the driving source, the cross-shaped connecting frame can be driven to rotate, facilitating the rapid replacement of the clean filter cylinder with the filter cylinder with blocked meshes. As the cam continuously rotates, and with the elastic assistance of the first spring, the moving plate and the water inlet elbow can be driven to continuously move downward and reset until the water inlet elbow enters the new filter cylinder. At this time, the new filter cylinder can continue to filter the impurities in the printing and dyeing wastewater. The entire replacement process does not require the machine to stop, and will not affect the treatment efficiency of the printing and dyeing wastewater. Subsequently, the user can extract the filter cylinder with blocked meshes from the corresponding fixed cylinder for cleaning, without the need to stop the machine for a long time to clean the impurities attached to the filter cylinder, improving the working efficiency of the device.

[0015] 2. In the present invention, by providing a limit ring, a positioning ring, a second spring, and a moving ring, using the elastic rebound of the second spring, a continuous pushing force can be applied to the moving ring, facilitating the rapid upward movement of the limit ring when the filter cylinder separates from the annular baffle and the support frame. Thus, the filter cylinder can be driven to quickly bounce upward, facilitating the user to quickly remove the filter cylinder and quickly clean the impurities attached thereto.

[0016] 3. In the present invention, by providing a rotating shaft, a pressing plate, a pressing wheel, and a clamping seat, with the assistance of the rotating shaft and the movable seat, the pressing plate can swing up and down while rotating, facilitating the quick clamping of the pressing plate and the clamping seat. Thus, with the assistance of the pressing wheel, on the one hand, the filter cylinder can be extruded, and on the other hand, the filter cylinder can rotate without obstruction when the position needs to be replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of a multi-stage printing and dyeing wastewater treatment device of the present invention;

[0018] Figure 2 is a bottom view of the structure of a multi-stage printing and dyeing wastewater treatment device of the present invention;

[0019] Figure 3 is a cross-sectional view of the structure of the filter tank of the present invention;

[0020] Figure 4 is a cross-sectional view of the structure of the fixed cylinder of the present invention;

[0021] Figure 5 is a three-dimensional view of the structure of the filter cylinder of the present invention;

[0022] Figure 6 is a three-dimensional view of the structure of the rotating shaft, the pressing plate, and the clamping seat of the present invention;

[0023] Figure 7 isFigure 1 Enlarged view of the structure at A in the middle.

[0024] In the figure: 1, filtration tank; 2, sedimentation tank; 3, annular baffle; 4, mounting frame; 5, support frame; 6, auxiliary frame; 7, water inlet elbow; 8, water passing frame; 9, water pump; 10, drain pipe; 11, fixed pipe; 12, flow meter; 13, auxiliary filtration mechanism; 131, telescopic column; 132, moving plate; 133, connecting plate; 134, first motor; 135, cam; 136, first spring; 137, second motor; 138, cross connecting frame; 139, fixed cylinder; 1310, filter cylinder; 14, limit ring; 15, positioning ring; 16, second spring; 17, moving ring; 18, rotating shaft; 19, pressing plate; 20, card seat; 21, lead screw; 22, pressing wheel; 23, liquid level sensor. Specific implementation mode

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0026] Embodiment 1

[0027] Please refer to Figure 1-7 , the present invention provides a technical solution: a multi-stage treatment device for printing and dyeing wastewater, including a filtration tank 1 and a sedimentation tank 2. An annular baffle 3 is fixedly connected to the filtration tank 1. A support frame 5 is fixedly connected inside the annular baffle 3. The left side of the top of the annular baffle 3 is fixedly connected with a mounting frame 4. A water inlet elbow 7 is inserted into the mounting frame 4. An auxiliary filtration mechanism 13 is arranged inside the filtration tank 1. The design of the auxiliary filtration mechanism 13 facilitates the quick replacement of the clean filter cylinder 1310 and the filter cylinder 1310 with blocked meshes. The new filter cylinder 1310 can continue to filter the impurities in the printing and dyeing wastewater. The entire replacement process does not require shutdown and will not affect the treatment efficiency of the printing and dyeing wastewater. Subsequently, the user can pull out the filter cylinder 1310 with blocked meshes from the corresponding fixed cylinder 139 for cleaning. The left side of the bottom of the filtration tank 1 is communicated with a water passing frame 8. A water pump 9 is arranged on one side of the sedimentation tank 2, and the water inlet end of the water pump 9 is communicated with the water passing frame 8. The water outlet end of the water pump 9 is communicated with a drain pipe 10, and one end of the drain pipe 10 is communicated with the left side of the top of the sedimentation tank 2. Both sides of the bottom of the sedimentation tank 2 are communicated with sewage pipes, and valves are arranged on the sewage pipes. The sedimentation tank 2 is sequentially communicated with a chemical feeding pipe and a fixed pipe 11 in the left-right direction. The front of the mounting frame 4 is fixedly connected with a controller.

[0028] Embodiment 2

[0029] Please refer to Figure 1-7, the present invention provides a technical solution: a multi-stage treatment device for printing and dyeing wastewater, including a filtration tank 1 and a sedimentation tank 2. A circular baffle 3 is fixedly connected to the filtration tank 1. A support frame 5 is fixedly connected inside the circular baffle 3. On the left side of the top of the circular baffle 3, a mounting frame 4 is fixedly connected. An inlet elbow 7 is inserted into the mounting frame 4. On the left side of the top of the circular baffle 3, an auxiliary frame 6 is fixedly connected and used in cooperation with the inlet elbow 7. A locking ring is fixedly connected to the inlet elbow 7 and the bottom of the locking ring is attached to the auxiliary frame 6. The design of the auxiliary frame 6 can assist in supporting the inlet elbow 7 and improve its stability. At the same time, the design of the locking ring can limit the downward movement position of the inlet elbow 7. An auxiliary filtration mechanism 13 is arranged inside the filtration tank 1. The auxiliary filtration mechanism 13 includes a plurality of sets of telescopic columns 131 symmetrically fixedly connected to the circular baffle 3 and the support frame 5 in the front-rear direction. A moving plate 132 used in cooperation with the inlet elbow 7 is fixedly connected to the telescopic column 131. A first spring 136 is sleeved on the inlet elbow 7 and both ends of the first spring 136 are respectively fixedly connected to the top of the moving plate 132 and the top of the inner cavity of the mounting frame 4. On one side where two sets of telescopic columns 131 are close to each other, a connecting plate 133 is longitudinally connected. On the right side of the connecting plate 133, a first motor 134 is fixedly connected through a first bracket. The output end of the first motor 134 penetrates through the connecting plate 133 and is fixedly connected to a cam 135 used in cooperation with the moving plate 132. A second motor 137 is fixedly connected to the support frame 5 through a second bracket. The output end of the second motor 137 penetrates through the support frame 5 and is fixedly connected to a cross connecting frame 138, and the bottom end of the cross connecting frame 138 is rotatably installed on the right side of the bottom of the inner cavity of the filtration tank 1. Filter cartridges 1310 are arranged in fixing cylinders 139 fixedly connected to all around the cross connecting frame 138. The top of the filter cartridge 1310 is movably connected to the bottom of the circular baffle 3 and the support frame 5. A notch used in cooperation with the filter cartridge 1310 is formed on the front surface of the circular baffle 3. An arc-shaped groove used in cooperation with the filter cartridge 1310 is formed on the support frame 5, which is convenient for the user to quickly remove the filter cartridge 1310 with blocked meshes from the fixing cylinder 139 for cleaning. A rotating shaft 18 is rotatably installed on the front surface of the top of the filtration tank 1. The top end of the rotating shaft 18 is fixedly connected to a movable seat, and a pressing plate 19 is rotatably connected inside the movable seat. On the bottom of the pressing plate 19, two sets of pressing wheels 22 are symmetrically fixedly connected in the front-rear direction and the bottom of the pressing wheels 22 is attached to one of the filter cartridges 1310. A clamping seat 20 used in cooperation with the pressing plate 19 is fixedly connected to the support frame 5. On the one hand, it can squeeze and limit the filter cartridge 1310, and on the other hand, it can enable the filter cartridge 1310 to rotate unobstructedly when the position needs to be adjusted. On one side of the top of the clamping seat 20, a lead screw 21 is threadedly connected through a threaded sleeve and the bottom end of the lead screw 21 is inserted into the bottom of the inner cavity of the clamping seat 20. The left side of the lead screw 21 is movably connected to the right side of the pressing plate 19. Utilizing the threaded connection between the lead screw 21 and the threaded sleeve, the pressing plate 19 can be further limited. One end of the inlet elbow 7 extends into one of the filter cartridges 1310.The design of the auxiliary filtering mechanism 13 facilitates the rapid replacement of the clean filter cartridge 1310 with the filter cartridge 1310 with blocked meshes. The new filter cartridge 1310 can continue to filter the impurities in the printing and dyeing wastewater. The entire replacement process does not require the machine to stop, and will not affect the treatment efficiency of the printing and dyeing wastewater. Subsequently, the user can pull out the filter cartridge 1310 with blocked meshes from the corresponding fixed cylinder 139 for cleaning. A limiting ring 14 is fixedly connected to the surface of the filter cartridge 1310, and a positioning ring 15 is fixedly connected inside the fixed cylinder 139. Four sides of the top of the positioning ring 15 are fixedly connected with second springs 16. The top ends of the second springs 16 are fixedly connected with a moving ring 17, and the moving ring 17 is slidably arranged inside the fixed cylinder 139. The top of the moving ring 17 is in contact with the bottom of the limiting ring 14. By using the elastic rebound of the second spring 16, a driving force can be continuously applied to the moving ring 17, so that when the filter cartridge 1310 is separated from the annular baffle 3 and the support frame 5, the moving ring 17 can push the limiting ring 14 to move up quickly, thereby driving the filter cartridge 1310 to bounce up quickly, facilitating the user to quickly take out the filter cartridge 1310 and quickly clean the impurities attached thereto. The left side of the bottom of the filter tank 1 is communicated with a water passing frame 8. A water pump 9 is arranged on one side of the sedimentation tank 2, and the water inlet end of the water pump 9 is communicated with the water passing frame 8. The water outlet end of the water pump 9 is communicated with a drain pipe 10, and one end of the drain pipe 10 is communicated with the left side of the top of the sedimentation tank 2. Both sides of the bottom of the sedimentation tank 2 are communicated with sewage pipes, and valves are arranged on the sewage pipes. The sedimentation tank 2 is sequentially communicated with a medicine inlet pipe and a fixed pipe 11 in the left-right direction. A controller is fixedly connected to the front of the mounting frame 4. A flow meter 12 is arranged on the water passing frame 8, which can monitor the water flow rate in real time, so as to transmit a signal in time when the flow rate decreases. A liquid level sensor 23 is arranged at one end of the water inlet elbow 7 located in the filter cartridge 1310, which can monitor the water level condition in the filter cartridge 1310 in real time, avoiding the printing and dyeing wastewater directly entering the water passing frame 8 without filtration due to too serious blockage of the filter cartridge 1310. Alarm devices are fixedly connected to the tops of the front and back of the mounting frame 4, which can give an alarm in time when the flow meter 12 and the liquid level sensor 23 are abnormal.,

[0030] Working principle: During use, the printing and dyeing wastewater can quickly fall into one of the filter cartridges 1310 through the water inlet elbow 7. Subsequently, the filtered printing and dyeing wastewater can quickly drain out of the filter tank 1 through the water passing frame 8. Under the pressure of the water pump 9, it quickly enters the sedimentation tank 2 through the drain pipe 10. Then, the user quickly adds the agent for adjusting the pH of the water quality through the chemical inlet pipe. After mixing for a period of time, the user adds the flocculant into the sedimentation tank 2. At this time, the printing and dyeing wastewater is mixed with the flocculant, and at the same time, the suspended impurities in the printing and dyeing wastewater quickly flocculate and precipitate. During long-term filtration, the mesh holes of the filter cartridge 1310 will become blocked. At this time, the user turns on the first motor 134 through the controller. The first motor 134 can drive the cam 135 to rotate, thereby pushing the moving plate 132 and the water inlet elbow 7 to move upward synchronously and continuously compress the first spring 136 until one end of the water inlet elbow 7 completely disengages from the filter cartridge 1310. At this time, the cam 135 rotates to the highest point. At this time, using the second motor 137 as the driving source, the cross connecting frame 138 can be driven to rotate, thereby quickly swapping the positions of the clean filter cartridge 1310 and the filter cartridge 1310 with blocked mesh holes. As the cam 135 continues to rotate, and with the elastic assistance of the first spring 136, the moving plate 132 and the water inlet elbow 7 can be driven to continuously move downward and reset until the water inlet elbow 7 enters the new filter cartridge 1310. At this time, the filter cartridge 1310 with blocked mesh holes will contact the pressure wheel 22. Then, the user rotates the screw rod 21 to disengage it from the thread sleeve and release the locking state of the pressing plate 19. Then, the user rotates the pressing plate 19 to remove the pressing plate 19 from the card seat 20. At this time, using the elastic rebound of the second spring 16, the moving ring 17 and the limiting ring 14 can be pushed to move upward quickly, thereby driving the filter cartridge 1310 with blocked mesh holes to move upward quickly. At this time, the user takes out the filter cartridge 1310 from the fixed cylinder 139 and can clean it. The entire cleaning process is very convenient and there is no need to stop the machine for cleaning, and the equipment can operate normally.

[0031] However, as is well known to those skilled in the art, the working principles and wiring methods of the first motor 134, the second motor 137, the controller, the water pump 9, the flow meter 12, the alarm and the liquid level sensor 23 are common knowledge, and they all belong to conventional means or well-known common sense, so they will not be elaborated here. Those skilled in the art can make arbitrary selections according to their needs or convenience.

[0032] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-stage treatment device for printing and dyeing wastewater, comprising a filtration tank (1) and a sedimentation tank (2), characterized in that: An annular baffle (3) is fixedly connected to the filtration tank (1), a support frame (5) is fixedly connected inside the annular baffle (3), a mounting frame (4) is fixedly connected to the left side of the top of the annular baffle (3), a water inlet elbow (7) is inserted into the mounting frame (4), and an auxiliary filtration mechanism (13) is arranged inside the filtration tank (1); The left side of the bottom of the filtration tank (1) is communicated with a water passing frame (8), a water pump (9) is arranged on one side of the sedimentation tank (2), the water inlet end of the water pump (9) is communicated with the water passing frame (8), and the water outlet end of the water pump (9) is communicated with a drain pipe (10), and one end of the drain pipe (10) is communicated with the left side of the top of the sedimentation tank (2); Both sides of the bottom of the sedimentation tank (2) are communicated with sewage discharge pipes, and valves are arranged on the sewage discharge pipes. The sedimentation tank (2) is sequentially communicated with a chemical feeding pipe and a fixed pipe (11) in the left-right direction, and a controller is fixedly connected to the front surface of the mounting frame (4); The auxiliary filtration mechanism (13) includes a plurality of groups of telescopic columns (131) symmetrically and fixedly connected to the annular baffle (3) and the support frame (5) in the front-rear direction. A moving plate (132) used in cooperation with the water inlet elbow (7) is fixedly connected to the telescopic column (131). A first spring (136) is sleeved on the water inlet elbow (7), and both ends of the first spring (136) are respectively fixedly connected to the top of the moving plate (132) and the top of the inner cavity of the mounting frame (4). A connecting plate (133) is longitudinally connected to the side of two groups of the telescopic columns (131) close to each other. A first motor (134) is fixedly connected to the right side of the connecting plate (133) through a first bracket. The output end of the first motor (134) penetrates through the connecting plate (133) and is fixedly connected to a cam (135) used in cooperation with the moving plate (132). A second motor (137) is fixedly connected to the support frame (5) through a second bracket. The output end of the second motor (137) penetrates through the support frame (5) and is fixedly connected to a cross connecting frame (138), and the bottom end of the cross connecting frame (138) is rotatably installed on the right side of the bottom of the inner cavity of the filtration tank (1). Fixing cylinders (139) are fixedly connected to the four sides of the cross connecting frame (138). A filter cylinder (1310) is arranged inside the fixing cylinder (139), and the top of the filter cylinder (1310) is movably connected to the bottom of the annular baffle (3) and the support frame (5). One end of the water inlet elbow (7) extends into one of the filter cylinders (1310).

2. A multi-stage treatment device for printing and dyeing wastewater according to claim 1, characterized in that: A limiting ring (14) is fixedly connected to the surface of the filter cartridge (1310). A positioning ring (15) is fixedly connected inside the fixed cylinder (139). Second springs (16) are fixedly connected to the four circumferences of the top of the positioning ring (15). The top ends of the second springs (16) are fixedly connected to a moving ring (17), and the moving ring (17) is slidably arranged inside the fixed cylinder (139). The top of the moving ring (17) is in contact with the bottom of the limiting ring (14).

3. A multi-stage printing and dyeing wastewater treatment device according to claim 1, characterized in that: A notch for cooperating with the filter cartridge (1310) is formed on the front surface of the annular baffle (3). An arc-shaped groove for cooperating with the filter cartridge (1310) is formed on the support frame (5).

4. A multi-stage printing and dyeing wastewater treatment device according to claim 1, characterized in that: A rotating shaft (18) is rotatably installed on the front surface of the top of the filter tank (1). The top end of the rotating shaft (18) is fixedly connected to a movable seat, and a pressing plate (19) is rotatably connected inside the movable seat. Two groups of pressing wheels (22) are symmetrically fixedly connected to the bottom of the pressing plate (19) along the front-rear direction, and the bottoms of the pressing wheels (22) are in contact with one group of filter cartridges (1310). A clamping seat (20) for cooperating with the pressing plate (19) is fixedly connected to the support frame (5).

5. A multi-stage printing and dyeing wastewater treatment device according to claim 1, characterized in that: A flow meter (12) is arranged on the water passing frame (8). A liquid level sensor (23) is arranged at one end of the water inlet elbow (7) located at the filter cartridge (1310). Alarm devices are fixedly connected to the tops of the front and back surfaces of the mounting frame (4).

6. A multi-stage printing and dyeing wastewater treatment device according to any one of claims 1-5, characterized in that: An auxiliary frame (6) for cooperating with the water inlet elbow (7) is fixedly connected to the left side of the top of the annular baffle (3). A locking ring is fixedly connected to the water inlet elbow (7), and the bottom of the locking ring is in contact with the auxiliary frame (6).

7. A multi-stage printing and dyeing wastewater treatment device according to claim 4, characterized in that: One side of the top of the clamping seat (20) is threadedly connected with a lead screw (21) through a threaded sleeve, and the bottom end of the lead screw (21) is inserted into the bottom of the inner cavity of the clamping seat (20). The left side of the lead screw (21) is movably connected to the right side of the pressing plate (19).

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