Environment-friendly printing sewage treatment equipment

Abstract

The invention discloses environment-friendly printing sewage treatment equipment, and relates to the technical field of printing sewage treatment.The environment-friendly printing sewage treatment equipment comprises a workbench, a filter box is fixedly installed at the bottom of the workbench, a controller is fixedly connected to the front side of the filter box, a rotary drum is rotatably installed at the top of the workbench through a bearing, and a circulating groove is formed in the top of the workbench on the periphery of the bearing; a motor is fixedly connected to the top of the fixing frame, the bottom of an output shaft of the motor is fixedly connected with the top of the rotary drum, fixing plates are fixedly installed on the left side, the right side, the front side and the rear side of the rotary drum, and a plurality of through holes are formed in the surfaces of the fixing plates. The rotary drum is driven by the motor to rotate at a high speed, solid particles such as printing ink and paper scraps in sewage in the rotary drum are thrown to the drum wall through centrifugal force, solid-liquid separation is achieved through the through holes, a chemical agent treatment mode is replaced, the risk of secondary pollution is reduced, agents do not need to be bought continuously, and the long-term operation cost is reduced.

Description

Technical Field

[0001] The present invention relates to the field of printing wastewater treatment, in particular to an environmentally friendly printing wastewater treatment device. Background Art

[0002] Printing wastewater mainly comes from equipment cleaning, ink replacement and other links in the printing process. It contains pollutants such as ink, chemical additives, glue, paper fiber, etc. Among them, suspended solids, chemical oxygen demand, heavy metal ions and color are the main pollution indicators. Direct discharge of untreated printing wastewater will cause serious harm to water bodies, soil and ecosystems, such as reducing dissolved oxygen in water bodies, destroying ecological balance, and threatening human health through the food chain. Therefore, sewage treatment equipment is needed to treat printing wastewater.

[0003] Existing technologies use chemical treatment methods to treat sewage. By adding chemical agents (such as PAC, PAM, etc.), they react with pollutants in the sewage through flocculation, precipitation, oxidation, etc., converting the pollutants into harmless substances or causing them to precipitate.

[0004] However, chemical treatment can easily cause chemical pollution after adding chemical agents, which poses a risk of secondary pollution. In addition, it is necessary to continuously purchase chemicals, resulting in high long-term operating costs. Therefore, it is necessary to propose an environmentally friendly printing wastewater treatment equipment to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide an environmentally friendly printing wastewater treatment equipment to solve the problem that the chemical treatment method proposed in the background technology is prone to chemical pollution after the addition of chemical agents, there is a risk of secondary pollution, and it requires continuous purchase of chemicals, resulting in high long-term operating costs.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: An environmentally friendly printing wastewater treatment device includes a workbench, a filter box is fixedly installed on the bottom of the workbench, a controller is fixedly connected to the front side of the filter box, a rotating drum is rotatably installed on the top of the workbench through a bearing, a circulation groove is provided on the top of the workbench outside the bearing, a fixing frame is fixedly installed on the top of the workbench on the left side of the rotating drum, a motor is fixedly connected to the top of the fixing frame, the bottom of the output shaft of the motor is fixedly connected to the top of the rotating drum, fixing plates are fixedly installed on the left and right sides and front and back sides of the rotating drum, a plurality of through holes are provided on the surface of the fixing plates, and a connecting pipe is fixedly installed on the right side of the rotating drum on the top of the fixing plate; an adjusting component is provided on the outside of the fixing plate, and the adjusting component is used to adjust the size of the through hole; a protective component is provided on the periphery of the adjusting component, and the protective component is used to prevent sewage from splashing.

[0007] The above-mentioned technical solution is adopted. In this solution, the drum is rotated and after the printing wastewater is supplied into the interior of the drum, the drum is driven to rotate at high speed by a motor. The centrifugal force can be used to throw the ink, paper scraps and other solid particles in the wastewater inside the drum to the drum wall. At the same time, by opening a through hole, other liquids can be easily discharged through the through hole, and the ink, paper scraps and other solid particles can be intercepted to achieve solid-liquid separation, thereby replacing the treatment method of using chemical agents, reducing the risk of secondary pollution, and eliminating the need to continuously purchase agents, reducing long-term operating costs.

[0008] A further improvement of the technical solution of the present invention is that the adjusting component includes a movable plate, which is located on the outside of the fixed plate, an electric push rod is fixedly installed on the outside of the rotating drum on the top of the fixed plate, the outer side of the telescopic rod of the electric push rod is fixedly connected to the movable plate, and a plurality of blocks are fixedly installed on the inside of the movable plate, the size and shape of the blocks match the through holes, and the positions of the plurality of blocks and the through holes correspond one to one.

[0009] The above-mentioned technical solution is adopted. In this solution, an adjustment component is set, in which a part of the block is stuck into the inside of the through hole, so that the volume of the through hole can be reduced, thereby limiting the movement of solid particles such as ink and paper scraps, and by using an electric push rod to drive the movable plate to move outward or inward, the area size of the through hole that can flow can be adjusted to accommodate ink, paper scraps and other solid particles of different volumes, thereby improving the flexibility of the device, and there is no need to replace different equipment to intercept and filter solid particles such as ink and paper scraps of different volumes, thereby expanding the applicability of the device.

[0010] A further improvement of the technical solution of the present invention is that the tops of the plurality of stoppers are each provided with two inclined surfaces.

[0011] The above-mentioned technical solution is adopted. In this solution, two inclined surfaces are opened on the top of the block, and the highest points of the two inclined surfaces are just set as top points, which can facilitate the liquid near the top of the block flowing out of the inside of the drum to flow to the bottom. Compared with the flat surface, the possibility of liquid remaining on the top of the block is reduced, ensuring that the printing wastewater can be filtered and treated normally in the subsequent process, reducing waste.

[0012] A further improvement of the technical solution of the present invention is that the protective component includes a protective cover, which is fixedly connected to the outer surface of the drum, and the bottom surface of the protective cover is lower than the bottom surface of the fixed plate.

[0013] The above-mentioned technical solution is adopted. In this solution, a protective component is set, in which a protective cover is installed, and the bottom of the protective cover is set to be lower than the bottom of the fixed plate, so that the periphery of the fixed plate can be shielded, thereby reducing the risk of liquid splashing outward due to the high-speed rotation of the drum after solid-liquid separation. The protective cover can intercept and protect the liquid, further ensuring that the printing wastewater can be filtered and treated normally afterwards, thereby reducing waste.

[0014] A further improvement of the technical solution of the present invention is that: a resistance plate is provided on the inner side of the protective cover, and the resistance plate and the outer surface of the movable plate are squeezed against each other. A threaded rod is installed on the outer side of the movable plate through a bearing for rotation. The outer side of the threaded rod passes through the interior of the protective cover, and the threaded rod is threadedly connected to the inner wall of the protective cover. A movable rod is fixedly installed on the outer side of the resistance plate outside the threaded rod, and the movable rod passes through the interior of the protective cover, and the movable rod is slidably connected to the inner wall of the protective cover.

[0015] The above-mentioned technical solution is adopted. In this solution, by installing a threaded rod and a resistance plate, after the movable plate is moved to the specified position by the electric push rod, the threaded rod is rotated to simultaneously drive the resistance plate to move inward, so that it fits and contacts the surface of the movable plate, and the movable plate can be limited from the outside, reducing the possibility that the high-speed rotation of the drum will cause the electric push rod and the telescopic rod of the electric push rod to form a centrifugal force that separates the electric push rod and the telescopic rod of the electric push rod, thereby causing the electric push rod and the telescopic rod of the electric push rod to move or disengage, ensuring that the block can be stably maintained in the specified position, so as to normally filter and process solid particles such as ink and paper scraps, and protecting the electric push rod.

[0016] A further improvement of the technical solution of the present invention is that movable blocks are fixedly installed on both sides of the movable plate, a slide rail is fixedly installed inside the protective cover, and the top and bottom of the movable block are slidably connected to the surface of the slide rail.

[0017] The above-mentioned technical solution is adopted. In this solution, by installing the movable block and the slide rail, when the electric push rod drives the movable plate to move, the movable block can slide along the inside of the slide rail, thereby guiding and limiting the sliding trajectory of the movable plate, ensuring that the movable plate maintains a straight line movement.

[0018] A further improvement of the technical solution of the present invention is that a guide plate is fixedly installed at the bottom of the interior of the drum, and the top of the guide plate is in a pyramid shape.

[0019] The above-mentioned technical solution is adopted. In this solution, by installing a guide plate and setting the top of the guide plate into a pyramid shape, the printing wastewater can be guided to the left and right sides and the front and back sides respectively, reducing the possibility of wastewater accumulating in the center position inside the drum and improving the solid-liquid separation effect.

[0020] A further improvement of the technical solution of the present invention is that an activated carbon layer is fixedly installed inside the filter box.

[0021] The above technical solution adopts an activated carbon layer to filter and adsorb the liquid after solid-liquid separation, replacing the treatment method using chemical agents, further reducing the risk of secondary pollution and long-term operating costs.

[0022] In summary, due to the adoption of the above technical solution, the present invention has achieved the following technical advancements compared to the prior art: 1. The present invention provides an environmentally friendly printing wastewater treatment equipment. Through the mutual cooperation between the rotating drum and its internal structure, after the printing wastewater is supplied to the interior of the rotating drum, the rotating drum is driven by a motor to rotate at high speed, which can use centrifugal force to throw solid particles such as ink and paper scraps in the wastewater inside the rotating drum toward the cylinder wall of the rotating drum. At the same time, other liquids can flow out through the through holes, intercepting solid particles such as ink and paper scraps inside the rotating drum to achieve solid-liquid separation. At the same time, by providing an activated carbon layer, the treatment method using chemical agents is replaced, thereby reducing the risk of secondary pollution, and there is no need to continuously purchase agents, reducing long-term operating costs, and achieving an environmental protection effect.

[0023] 2. The present invention provides an environmentally friendly printing wastewater treatment device. By adjusting the mutual cooperation between the components, the movable plate is driven to move by an electric push rod, so that the area of ​​the through hole that can flow can be adjusted to accommodate solid particles such as ink and paper scraps of different sizes. In addition, solid particles such as ink and paper scraps of different sizes can be intercepted and filtered without changing different equipment, thereby improving the flexibility of the device and expanding the applicability of the device.

[0024] 3. The present invention provides an environmentally friendly printing wastewater treatment equipment. Through the mutual cooperation between protective components, the protective cover can be installed to shield the periphery of the fixed plate, thereby reducing the possibility of liquid splashing outward due to the high-speed rotation of the drum, and after the movable plate is driven to move to the specified position by the electric push rod, the threaded rod can be rotated to drive the resistance plate to move inward, and the surface of the movable plate is resisted and limited from the outside, thereby reducing the possibility of the electric push rod and the telescopic rod of the electric push rod being moved or separated due to the centrifugal force generated by the high-speed rotation of the drum, thereby ensuring the normal filtering treatment of solid particles such as ink and paper scraps, and at the same time protecting the electric push rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a perspective view of the present invention.

[0026] Figure 2 It is a schematic diagram of the local structure of the workbench of the present invention.

[0027] Figure 3 It is a schematic diagram of the partial structure of the cross section of the drum of the present invention; Figure 4 It is a schematic diagram of a partially exploded cross-section of the movable panel of the present invention; Figure 5 It is a schematic diagram of the partial structure of the front cross section of the rotating drum of the present invention; Figure 6 It is a schematic diagram of the partial explosion structure of the protective cover cross section of the present invention; Figure 7 It is a partial structural schematic diagram of the cross section of the filter box of the present invention.

[0028] Description of reference numerals: 1. Workbench; 2. Rotating drum; 3. Protective cover; 4. Controller; 5. Fixed frame; 6. Filter box; 7. Circulation slot; 8. Motor; 9. Connecting pipe; 10. Threaded rod; 11. Fixed plate; 12. Block; 13. Movable plate; 14. Electric push rod; 15. Guide plate; 16. Through hole; 17. Movable block; 18. Contact plate; 19. Slide rail; 20. Activated carbon layer; 21. Movable rod. DETAILED DESCRIPTION

[0029] The present invention is described in further detail below in conjunction with the embodiments: Example 1 like Figure 1 、 Figure 3 and Figure 7 As shown, the present invention provides an environmentally friendly printing sewage treatment equipment, including a workbench 1, a filter box 6 is fixedly installed on the bottom of the workbench 1, a controller 4 is fixedly connected to the front side of the filter box 6, a rotating drum 2 is rotatably installed on the top of the workbench 1 through a bearing, a circulation groove 7 is provided on the top of the workbench 1 outside the bearing, a fixing frame 5 is fixedly installed on the top of the workbench 1 on the left side of the rotating drum 2, a motor 8 is fixedly connected to the top of the fixing frame 5, the bottom of the output shaft of the motor 8 is fixedly connected to the top of the rotating drum 2, and a fixing plate 11 is fixedly installed on the left and right sides and the front and back sides of the rotating drum 2, a plurality of through holes 16 are provided on the surface of the fixing plate 11, and a connecting pipe 9 is fixedly installed on the right side of the rotating drum 2 on the top of the fixing plate 11; an adjusting component is provided on the outside of the fixing plate 11, and the adjusting component is used to adjust the size of the through hole 16; a protective component is provided on the periphery of the adjusting component, and the protective component is used to prevent sewage from splashing, and an activated carbon layer 20 is fixedly installed inside the filter box 6.

[0030] In this embodiment, the drum 2 is rotated, and after the printing wastewater is supplied into the interior of the drum 2, the motor 8 drives the drum 2 to rotate at high speed, so that the solid particles such as ink and paper scraps in the wastewater inside the drum 2 can be thrown toward the drum wall of the drum 2 by centrifugal force. At the same time, by providing the through hole 16, other liquids can be easily discharged through the through hole 16, and the solid particles such as ink and paper scraps can be intercepted to achieve solid-liquid separation, thereby replacing the treatment method using chemical agents, reducing the risk of secondary pollution, and eliminating the need to continuously purchase chemicals, thereby reducing long-term operating costs and achieving environmental protection effects. By installing the activated carbon layer 20, the liquid after solid-liquid separation can be filtered and adsorbed, replacing the treatment method using chemical agents, further reducing the risk of secondary pollution and long-term operating costs.

[0031] Example 2 like Figure 1 、 Figure 4 and Figure 5 As shown, on the basis of Example 1, the present invention provides a technical solution: preferably, the adjusting component includes a movable plate 13, which is located on the outside of the fixed plate 11, and an electric push rod 14 is fixedly installed on the outside of the rotating drum 2 on the top of the fixed plate 11. The outer side of the telescopic rod of the electric push rod 14 is fixedly connected to the movable plate 13, and a plurality of blocks 12 are fixedly installed on the inner side of the movable plate 13. The size and shape of the block 12 match the through hole 16, and the positions of the plurality of blocks 12 and the plurality of through holes 16 correspond one to one, and the tops of the plurality of blocks 12 are provided with two inclined surfaces at the top.

[0032] In this embodiment, an adjusting component is provided, in which a part of the stopper 12 is stuck into the interior of the through hole 16, so that the volume of the through hole 16 can be reduced, thereby limiting the movement of solid particles such as ink and paper scraps, and by utilizing the electric push rod 14 to drive the movable plate 13 to move outward or inward, the area size of the through hole 16 that can flow can be adjusted to adapt to ink, paper scraps and other solid particles of different volumes, thereby improving the flexibility of the device, and can intercept and filter ink, paper scraps and other solid particles of different volumes without replacing different equipment, thereby expanding the applicability of the device; by opening two inclined surfaces at the top of the stopper 12, and the highest points of the two inclined surfaces are just set as top points, it is possible to facilitate the liquid flowing out of the inside of the drum 2 near the top of the stopper 12 to flow to the bottom, and compared with the flat surface, the possibility of liquid remaining on the top of the stopper 12 is reduced, ensuring that the printing wastewater can be normally filtered and treated subsequently, reducing waste.

[0033] Example 3 like Figure 1 、 Figure 3 and Figure 6As shown, on the basis of Example 2, the present invention provides a technical solution: preferably, the protective component includes a protective cover 3, which is fixedly connected to the outer surface of the rotating drum 2, and the bottom surface of the protective cover 3 is lower than the bottom surface of the fixed plate 11, and a contact plate 18 is provided on the inner side of the protective cover 3, and the contact plate 18 and the outer surface of the movable plate 13 are squeezed against each other, and a threaded rod 10 is rotatably installed on the outer side of the movable plate 13 through a bearing, and the outer side of the threaded rod 10 passes through the interior of the protective cover 3, and the threaded rod 10 is threadedly connected to the inner wall of the protective cover 3, and a movable rod 21 is fixedly installed on the outer side of the contact plate 18 of the threaded rod 10, and the movable rod 21 passes through the interior of the protective cover 3, and the movable rod 21 is slidably connected to the inner wall of the protective cover 3, and movable blocks 17 are fixedly installed on both sides of the movable plate 13, and a slide rail 19 is fixedly installed inside the protective cover 3, and the top and bottom of the movable block 17 are slidably connected to the surface of the slide rail 19, and a guide plate 15 is fixedly installed on the bottom of the interior of the rotating drum 2, and the top of the guide plate 15 is a pyramid shape.

[0034] In this embodiment, a protective component is provided, wherein a protective cover 3 is installed, and the bottom of the protective cover 3 is set to be lower than the bottom of the fixed plate 11, so that the periphery of the fixed plate 11 can be shielded, thereby reducing the risk of liquid splashing outward due to the high-speed rotation of the drum 2 after solid-liquid separation. The protective cover 3 can be used to intercept and protect the liquid, further ensuring that the subsequent printing wastewater can be filtered normally, thereby reducing waste; by installing the threaded rod 10 and the contact plate 18, after the electric push rod 14 is used to drive the movable plate 13 to move to the specified position, the threaded rod 10 is rotated and the contact plate 18 is driven to move inward at the same time, so that it and the surface of the movable plate 13 are in contact with each other, and the movable plate 13 can be limited from the outside, thereby reducing the impact of the high-speed rotation of the drum 2 on the electric push rod 14 and the electric push rod 14. The centrifugal force generated by the separation of the telescopic rod may cause the electric push rod 14 and the telescopic rod of the electric push rod 14 to move or disengage, ensuring that the block 12 can be stably maintained in the specified position so as to filter and process solid particles such as ink and paper scraps normally, and protect the electric push rod 14; by installing the movable block 17 and the slide rail 19, in the process of the electric push rod 14 driving the movable plate 13 to move, the movable block 17 can slide along the inside of the slide rail 19, and then can guide and limit the sliding trajectory of the movable plate 13, ensuring that the movable plate 13 maintains a straight line movement; by installing the guide plate 15, and by setting the top of the guide plate 15 to a pyramid shape, the printing sewage can be guided to the left and right sides and the front and back sides respectively, reducing the possibility of sewage accumulating in the center position inside the rotating drum 2, and improving the effect of solid-liquid separation.

[0035] The working principle of this environmentally friendly printing wastewater treatment equipment is explained in detail below.

[0036] like Figure 1-Figure 7 As shown, according to the actual size of solid particles such as ink and paper scraps, the operator can rotate each threaded rod 10 respectively, and at the same time drive the movable rod 21 to slide along the inside of the protective cover 3, so that the contact plate 18 moves outward and separates it from the surface of the movable plate 13, and then control each electric push rod 14 to drive the movable plate 13 to move, and at the same time drive the movable block 17 to slide along the inside of the slide rail 19, thereby driving the stop block 12 to move linearly inside the through hole 16, adjusting the size of the flowable area of ​​the through hole 16, and keeping the telescopic distance of each electric push rod 14 equal. After the adjustment is completed, the operator can rotate each threaded rod 10 in the opposite direction, and at the same time drive the movable rod 21 to slide along the inside of the protective cover 3, so that the contact plate 18 moves inward, so that it fits with the surface of the movable plate 13, and squeezes the movable plate 13 to limit the position. Then, the operator can connect the connecting pipe 9 to the external water supply equipment, and then supply the printing sewage into the interior of the rotating drum 2 through the connecting pipe 9, and then control the motor 8 to The moving drum 2 rotates at high speed, and at the same time drives the printing wastewater inside to rotate. The solid particles such as ink and paper scraps in the wastewater are thrown to the wall of the drum 2 and intercepted. At the same time, other liquids can flow out through the through hole 16, thereby realizing solid-liquid separation, which can replace the treatment method using chemical agents, reduce the risk of secondary pollution, and do not need to continuously purchase agents, reduce long-term operating costs, and achieve environmental protection effects. The liquid after solid-liquid separation flows into the interior of the filter box 6 through the circulation groove 7. The liquid contacts the activated carbon layer 20, and the activated carbon layer 20 can filter and adsorb the liquid after solid-liquid separation. The water after filtration is finally discharged from the bottom of the filter box 6; after the other liquids are completely discharged from the interior of the drum 2, the operator can move the block 12 to completely move it out of the interior of the fixed plate 11, block the circulation groove 7, and control the rotation of the drum 2 again to throw the remaining ink, paper scraps and other solid particles out of the drum 2, thereby realizing automatic cleaning of the interior of the drum 2.

[0037] The above generally describes the present invention in detail. However, it is obvious to those skilled in the art that modifications or improvements may be made based on the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. An environmentally friendly printing wastewater treatment device, comprising a workbench (1), characterized in that: A filter box (6) is fixedly installed at the bottom of the workbench (1), and a controller (4) is fixedly connected to the front side of the filter box (6). A rotating drum (2) is rotatably installed on the top of the workbench (1) through a bearing. A circulation groove (7) is provided on the top of the workbench (1) outside the bearing. A fixing frame (5) is fixedly installed on the top of the workbench (1) on the left side of the rotating drum (2). A motor (8) is fixedly connected to the top of the fixing frame (5). The bottom of the output shaft of the motor (8) is fixedly connected to the top of the rotating drum (2). Fixed plates (11) are fixedly installed on the left and right sides and the front and rear sides of the rotating drum (2). A plurality of through holes (16) are provided on the surface of the fixed plate (11). A connecting pipe (9) is fixedly installed on the right side of the rotating drum (2) on the top of the fixed plate (11). An adjusting component is provided on the outer side of the fixing plate (11), and the adjusting component is used to adjust the size of the through hole (16); A protective component is provided on the periphery of the regulating component, and the protective component is used to prevent sewage from splashing.

2. The environmentally friendly printing wastewater treatment equipment according to claim 1, characterized in that: The adjusting component includes a movable plate (13), which is located on the outside of the fixed plate (11); an electric push rod (14) is fixedly installed on the outside of the rotating drum (2) on the top of the fixed plate (11); the outer side of the telescopic rod of the electric push rod (14) is fixedly connected to the movable plate (13); a plurality of blocks (12) are fixedly installed on the inner side of the movable plate (13); the size and shape of the blocks (12) match those of the through holes (16), and the positions of the plurality of blocks (12) and the plurality of through holes (16) correspond one to one.

3. The environmentally friendly printing wastewater treatment equipment according to claim 2, characterized in that: The tops of the plurality of stoppers (12) are each provided with two inclined surfaces.

4. The environmentally friendly printing wastewater treatment equipment according to claim 3 is characterized by: The protective component comprises a protective cover (3), the protective cover (3) being fixedly connected to the outer surface of the drum (2), and the bottom surface of the protective cover (3) being lower than the bottom surface of the fixing plate (11).

5. The environmentally friendly printing wastewater treatment equipment according to claim 4, characterized in that: A contact plate (18) is provided on the inner side of the protective cover (3), and the contact plate (18) and the outer surface of the movable plate (13) are pressed against each other. A threaded rod (10) is rotatably mounted on the outer side of the movable plate (13) through a bearing. The outer side of the threaded rod (10) passes through the interior of the protective cover (3), and the threaded rod (10) is threadedly connected to the inner wall of the protective cover (3). A movable rod (21) is fixedly mounted on the outer side of the contact plate (18) outside the threaded rod (10), and the movable rod (21) passes through the interior of the protective cover (3), and the movable rod (21) is slidably connected to the inner wall of the protective cover (3).

6. The environmentally friendly printing wastewater treatment equipment according to claim 5, characterized in that: Movable blocks (17) are fixedly mounted on both sides of the movable plate (13), a slide rail (19) is fixedly mounted inside the protective cover (3), and the top and bottom of the movable block (17) are slidably connected to the surface of the slide rail (19).

7. The environmentally friendly printing wastewater treatment equipment according to claim 6, characterized in that: A guide plate (15) is fixedly mounted on the bottom of the rotating drum (2), and the top of the guide plate (15) is in a pyramid shape.

8. The environmentally friendly printing wastewater treatment equipment according to claim 1, characterized in that: An activated carbon layer (20) is fixedly installed inside the filter box (6).

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