A wastewater treatment device for corrugated paper printing

Abstract

This invention discloses a wastewater treatment device for corrugated paper printing, specifically relating to the field of wastewater treatment technology. It includes a treatment cylinder with an inlet valve fixedly connected to its upper end. A pretreatment structure is provided on the upper part of the inner surface of the treatment cylinder, a separation structure is provided in the middle of the inner surface, and an ultrafiltration structure is provided on the lower part of the inner surface. The wastewater treatment device of this invention agitates the wastewater through the buffering and stirring action of the pretreatment structure. Combined with flocculant added through a feeder and feed pipe, it precipitates corrugated paper fibers, ink, and other substances in the wastewater into solid suspended matter, which is then sent to the separation structure. The separation structure promotes the separation of wastewater, oily substances, and solid waste, reducing the proportion of insoluble substances in the wastewater. Through the cooperation of the separation structure and the ultrafiltration structure, the wastewater is further adsorbed and filtered in the ultrafiltration structure, reducing the content of inorganic pollutants in the wastewater.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a wastewater treatment device for corrugated paper printing. Background Technology

[0002] The field of wastewater treatment technology encompasses various treatment directions, including industrial wastewater treatment and domestic sewage purification. Its core content is to purify polluted water bodies through physical, chemical, and biological methods, removing harmful substances, impurities, and pollutants to ensure that the water quality meets the prescribed discharge standards or reuse requirements, thereby achieving sustainable use of water resources and environmental protection.

[0003] Corrugated paper printing wastewater treatment refers to the treatment of wastewater containing corrugated paper fibers, ink, and other pollutants generated during the printing process of corrugated paper.

[0004] Currently, conventional treatment methods mostly employ simple sedimentation and filtration techniques. For example, a corrugated paper printing wastewater treatment device disclosed in Chinese Patent Publication No. CN207608469U includes a wastewater collection tank, an acid precipitation flotation tank, a flocculation sedimentation tank, an alkaline reaction tank, an anaerobic reaction tank, a disinfection tank, and a water storage tank, which are connected in sequence by pipes equipped with suction pumps.

[0005] However, existing technologies are unable to effectively separate corrugated cardboard fibers and ink from wastewater, nor can they fully remove inorganic pollutants from wastewater. Furthermore, during the treatment process, the buffering and flocculation reactions of the wastewater are insufficient, resulting in poor separation of suspended solids and ink components.

[0006] Meanwhile, the lack of efficient separation and treatment methods in the oil-water separation and further filtration and adsorption stages results in low overall treatment efficiency, high working pressure on subsequent filter media, and short maintenance cycles. Summary of the Invention

[0007] The main objective of this invention is to provide a wastewater treatment device for corrugated paper printing, which can effectively solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0009] A wastewater treatment device for corrugated paper printing includes a treatment cylinder, a waste bin fixedly connected to the outer surface of the treatment cylinder, an outlet valve fixedly connected to the lower part of the outer surface of the treatment cylinder, an inlet valve fixedly connected to the upper end of the treatment cylinder, a pretreatment structure provided on the upper part of the inner surface of the treatment cylinder, a separation structure provided in the middle part of the inner surface of the treatment cylinder, and an ultrafiltration structure provided on the lower part of the inner surface of the treatment cylinder.

[0010] Preferably, a drive motor is fixedly connected to the bottom wall of the inner cavity of the processing cylinder via a motor bracket; a central drive column is rotatably connected to the bottom wall of the inner surface of the processing cylinder and connected to the waste bin via a belt drive; a feeder is fixedly connected to the bottom wall of the inner surface of the processing cylinder; a feed pipe communicating with the pretreatment structure is fixedly connected to the output end of the feeder; an oil storage tank is fixedly connected to the bottom wall of the inner surface of the processing cylinder; a liquid slip ring is rotatably connected to the lower part of the inner surface of the central drive column and fixedly connected to the oil storage tank via a pipe; and a base plate is fixedly connected to the lower part of the inner surface of the processing cylinder located below the water outlet valve.

[0011] Preferably, the pretreatment structure includes a buffer block located on the top wall of the inner cavity of the treatment cylinder. The upper end of the buffer block has a spiral water channel communicating with the lower end. The lower end of the buffer block is fixedly connected to an isolation plate one. The upper end of the isolation plate one has a communication port communicating with the lower end. A stirring assembly is provided at the lower end of the isolation plate. The spiral water channel is spiral in shape, with its upper side communicating with a water inlet valve and its lower side communicating with the communication port. The inner surface of the treatment cylinder located below the stirring assembly is fixedly connected to an isolation plate three. The upper end of the isolation plate three is provided with a magnetic control valve communicating with the lower end. The inner surface of the isolation plate one and the inner surface of the stirring assembly are rotatably connected to the outer surface of the central drive column.

[0012] Preferably, the stirring assembly includes a cross support plate fixedly connected to the central drive column. A plurality of stirring shafts are fixedly connected to the lower end of the cross support plate in a ring. The upper ends of the plurality of stirring shafts extend through the lower end of the cross support plate to the upper end of the cross support plate and are fixedly connected to a gear. A groove is provided at the lower end of the isolation plate. A toothed ring that meshes with the adjacent gear is fixedly connected to the inner surface of the groove.

[0013] Preferably, the separation structure includes a second isolation plate located below the third isolation plate and fixedly connected to the inner surface of the processing cylinder. A flotation component is provided on the outer surface of the central drive column between the second and third isolation plates. An annular groove communicating between the upper and lower sides of the second isolation plate is opened on the inner surface of the central drive column. A filter screen is fixedly connected to the upper part of the inner surface of the annular groove. A solenoid valve communicating with a waste bin is opened on the inner surface of the processing cylinder above the second isolation plate. Several scrapers that are in close contact with the outer surface of the filter screen are fixedly connected to the upper end of the second isolation plate in an annular distribution.

[0014] Preferably, the portion of the central drive column located inside the flotation assembly has a connecting cavity, and the bottom wall of the connecting cavity has an oil delivery pipe extending through the central drive column to the height of the liquid slip ring. The oil delivery pipe is connected to the inner cavity of the liquid slip ring through a through hole on the outer surface of the central drive column.

[0015] Preferably, the flotation assembly includes a baffle that is slidably connected to the outer surface of the central drive column through a limiting groove. The outer surface of the baffle is provided with a plurality of connecting grooves I that communicate with its inner surface. A hollow ring is fixedly connected to the lower part of the outer surface of the baffle. The inner surface of the connecting cavity is provided with a plurality of connecting grooves II that correspond to the connecting grooves I in the vertical direction.

[0016] Preferably, the ultrafiltration structure includes a hollow plate fixedly connected to the inner surface of the treatment cylinder, a filter layer fixedly installed at the upper end of the hollow plate, and a water distribution component provided on the outer surface of the central drive column located on the upper side of the filter layer.

[0017] Preferably, the water distribution assembly includes a rotating disk sleeved on the outer surface of the oil pipeline and rotatably connected to the central drive column. A gear ring is fixedly connected to the lower end of the rotating disk. A gear is meshed on the outer surface of the gear ring. A small motor installed on the inner surface of the central drive column is fixedly connected to the lower end of the gear. A plurality of water outlet holes communicating with its inner surface are distributed in an annular pattern on the outer surface of the rotating disk. The upper part of the inner cavity of the rotating disk is connected to an annular groove.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. This invention utilizes an inlet valve to deliver wastewater, and the wastewater is agitated through the buffering and stirring action of the pretreatment structure. Combined with flocculants added via a feeder and feed pipe, substances such as corrugated paper fibers and ink in the wastewater are precipitated into solid suspensions and sent to the separation structure. The separation structure facilitates the separation of wastewater, oily substances, and solid waste, reducing the proportion of insoluble substances in the wastewater. Furthermore, through the cooperation of the separation structure and the ultrafiltration structure, the separated wastewater is sent to the ultrafiltration structure for further adsorption and filtration, reducing the content of inorganic pollutants in the wastewater and facilitating subsequent further treatment.

[0020] 2. This invention utilizes the spiral water channel opened in the buffer block to buffer the sewage sent in by the inlet valve, so that it forms a continuous water flow into the space above the third isolation plate. Furthermore, the drive motor drives the central drive column to rotate the cross support plate. The gear and the gear ring drive the stirring shaft to revolve above the third isolation plate while rotating on its own axis, stirring the sewage above the third isolation plate. This promotes the sewage to fully react with the flocculant added by the feeder and feed pipe, causing suspended solids and some ink components to separate and form clumps of suspended solids, which facilitates subsequent separation.

[0021] 3. This invention utilizes flotation components and filters to separate solid waste, oil, and water, thereby converting oily and solid mixed wastewater into pure water, reducing the proportion of insoluble substances in the water, separating these impurities, improving the efficiency of subsequent treatment, reducing the working pressure on subsequent treatment filter media, extending the maintenance cycle, and increasing service life.

[0022] 4. This invention utilizes the water distribution component to spray the separated water into the filter layer. Through the distribution function of the water distribution component, the water is evenly sprayed above the filter layer and fully contacts the filter media in the filter layer, promoting the reaction between the activated carbon particles in the filter media and the water. This adsorbs small molecules such as organic nutrients and inorganic pollutants in the water, and further separates the solid particulate waste contained therein through the layered filter media, reducing the proportion of pollutants in the water, realizing the basic treatment process of sewage, and simplifying the overall treatment process. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a schematic cross-sectional view of the processing cylinder of the present invention;

[0025] Figure 3 This is a schematic diagram showing the positional relationship between the liquid slip ring and the oil pipeline of the present invention;

[0026] Figure 4 This is a schematic diagram of the pretreatment structure of the present invention;

[0027] Figure 5 This is a schematic diagram of the stirring assembly of the present invention;

[0028] Figure 6 For the present invention Figure 5 Enlarged schematic diagram of a local structure at point A;

[0029] Figure 7 This is a schematic diagram of the separation structure of the present invention;

[0030] Figure 8 This is a cross-sectional schematic diagram of the separation structure of the present invention;

[0031] Figure 9 For the present invention Figure 8 Enlarged schematic diagram of the local structure at point B;

[0032] Figure 10 This is a schematic diagram of the ultrafiltration structure of the present invention;

[0033] Figure 11 This is a schematic diagram of the water distribution component of the present invention.

[0034] In the diagram: 1. Outlet valve; 2. Processing cylinder; 21. Feeder; 22. Feeding pipe; 23. Central drive column; 24. Drive motor; 25. Oil tank; 26. Base plate; 27. Liquid slip ring; 3. Inlet valve; 4. Waste bin; 5. Pretreatment structure; 51. Buffer block; 52. Spiral water channel; 53. Isolation plate one; 54. Mixing assembly; 541. Cross support plate; 542. Mixing shaft; 543. Slide groove; 544. Gear one; 545. Gear ring one; 55. Connecting port; 56. Isolation 6. Separation structure; 61. Separation plate II; 62. Flotation assembly; 621. Baffle; 622. Connecting channel I; 623. Hollow ring; 63. Filter screen; 64. Solenoid valve; 65. Oil delivery pipe; 66. Connecting cavity; 661. Connecting channel II; 67. Annular channel; 68. Scraper; 7. Ultrafiltration structure; 71. Hollow plate; 72. Filter layer; 73. Water distribution assembly; 731. Small motor; 732. Gear II; 733. Gear ring II; 734. Rotating disk; 735. Water outlet. Detailed Implementation

[0035] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0036] Example 1, as Figure 1 and Figure 2 As shown, a corrugated paper printing wastewater treatment device includes a treatment cylinder 2, a waste bin 4 fixedly connected to the outer surface of the treatment cylinder 2, an outlet valve 1 fixedly connected to the lower part of the outer surface of the treatment cylinder 2, an inlet valve 3 fixedly connected to the upper end of the treatment cylinder 2, a pretreatment structure 5 provided on the upper part of the inner surface of the treatment cylinder 2, a separation structure 6 provided in the middle part of the inner surface of the treatment cylinder 2, and an ultrafiltration structure 7 provided on the lower part of the inner surface of the treatment cylinder 2.

[0037] During the printing process of corrugated cardboard boxes, the printing plate of the printer will be contaminated with a lot of ink and corrugated paper fibers. In the long-term use, the printing plate of the printer needs to be cleaned periodically. The wastewater generated during cleaning includes suspended solid particles, water-insoluble organic matter such as ink binders, and residual dissolved organic matter. If these components are discharged directly without treatment, they will cause serious pollution to water bodies and affect the ecological environment and human health.

[0038] Furthermore, to drive the pretreatment structure 5 and the separation structure 6, thereby achieving the treatment of printer cleaning wastewater, refer to... Figure 2 and Figure 3A drive motor 24 is fixedly connected to the bottom wall of the inner cavity of the treatment cylinder 2 via a motor bracket. A central drive column 23, which is connected to the waste bin 4 via a belt drive, is rotatably connected to the bottom wall of the inner surface of the treatment cylinder 2. A feeder 21 is fixedly connected to the bottom wall of the inner surface of the treatment cylinder 2. A feed pipe 22, which is connected to the pretreatment structure 5, is fixedly connected to the output end of the feeder 21. An oil storage tank 25 is fixedly connected to the bottom wall of the inner surface of the treatment cylinder 2. A liquid slip ring 27, which is fixedly connected to the oil storage tank 25 via a pipe, is rotatably connected to the lower part of the inner surface of the central drive column 23. A base plate 26 is fixedly connected to the lower part of the inner surface of the treatment cylinder 2, located below the water outlet valve 1.

[0039] It should be noted that the aforementioned feeder 21 is a basic feeding device with a built-in feeding pump. It can feed polyaluminum chloride and polyacrylamide into the pretreatment structure 5 through the feeding pipe 22 as flocculants to assist in the precipitation of oily components and suspended solids in the sewage. This structure has been widely used in the prior art. In this invention, it is only used to realize the function of feeding sewage. Its internal structure, operating principle, wiring and control method will not be described in detail.

[0040] In the operation of this embodiment, sewage is fed in through the inlet valve 3, and the sewage is agitated by the buffering and stirring action of the pretreatment structure 5. The flocculant added by the feeder 21 and feed pipe 22 causes corrugated cardboard fibers, ink and other substances in the sewage to precipitate into solid suspensions and send them into the separation structure 6. The separation action of the separation structure 6 promotes the separation of sewage, oily substances and solid waste, reducing the proportion of insoluble substances in the sewage. Furthermore, the separation structure 6 and the ultrafiltration structure 7 work together to send the separated sewage into the ultrafiltration structure 7 for further adsorption and filtration treatment, reducing the content of inorganic pollutants in the sewage and facilitating further treatment.

[0041] Example 2: Based on Example 1, this example uses the spiral water channel 52 in the buffer block 51 to buffer the sewage fed into the inlet valve 3, so that it forms a continuous water flow into the space above the isolation plate 3 56. Furthermore, the drive motor 24 drives the central drive column 23 to rotate the cross support plate 541. The gear 1 544 and the gear ring 1 545 drive the stirring shaft 542 to rotate above the space ...

[0042] Specifically, to achieve the goal of mixing wastewater with flocculants, thereby promoting the precipitation of ink components, suspended solids, and fiber components in the water, see [reference needed]. Figure 4The pretreatment structure 5 includes a buffer block 51 located on the top wall of the inner cavity of the treatment cylinder 2. The upper end of the buffer block 51 is provided with a spiral water channel 52 that communicates with the lower end. The lower end of the buffer block 51 is fixedly connected to an isolation plate 53. The upper end of the isolation plate 53 is provided with a communication port 55 that communicates with the lower end. The lower end of the isolation plate 53 is provided with a stirring assembly 54. The spiral water channel 52 is spiral in shape, with its upper side communicating with the water inlet valve 3 and its lower side communicating with the communication port 55. The part of the inner surface of the treatment cylinder 2 located below the stirring assembly 54 is fixedly connected to an isolation plate 56. The upper end of the isolation plate 56 is provided with a magnetic control valve that communicates with the lower end. The inner surface of the isolation plate 53 and the inner surface of the stirring assembly 54 are rotatably connected to the outer surface of the central drive column 23.

[0043] The spiral channel 52 is used to buffer the sewage sent in by the inlet valve 3, so that it flows upward to the isolation plate 3 56 in a spiral path. During the flow, due to the spiral path of the spiral channel 52, the water body will be subjected to a slight centrifugal force. This part of the centrifugal force will have a more obvious effect on solid waste, causing solid waste to move to the outside of the spiral and initially agglomerate, providing the core for subsequent flocculation.

[0044] The isolation plate 3 56 is used to isolate the reaction environment between the separation structure 6 and the pretreatment structure 5. The magnetic control valve installed on its upper part can be opened after the flocculation operation is completed, allowing the wastewater treated by the flocculant to enter the separation structure 6 below for further separation treatment.

[0045] Furthermore, to achieve mixing of the water and flocculant, refer to... Figure 5 and Figure 6 The stirring assembly 54 includes a cross support plate 541 fixedly connected to the central drive column 23. Several stirring shafts 542 are fixedly connected to the lower end of the cross support plate 541 in a ring. The upper ends of the stirring shafts 542 all extend through the lower end of the cross support plate 541 to the upper end of the cross support plate 541 and are fixedly connected to a gear 544. A groove 543 is provided at the lower end of the partition plate 53. A toothed ring 545 that meshes with the adjacent gear 544 is fixedly connected to the inner surface of the groove 543.

[0046] During the rotation of the central drive column 23, the cross support plate 541 will rotate synchronously. When the cross support plate 541 rotates, the stirring shaft 542 will revolve around the central drive column 23. During the synchronous revolve of the stirring shaft 542, the gear 544 on its upper part also revolves around the axis of the central drive column 23. However, since the gear 544 and the gear ring 545 are meshed, when the gear 544 revolves, the gear ring 545 is stationary, which will cause the gear 544 to rotate under the meshing action, thereby driving the stirring shaft 542 to rotate. This makes the stirring shaft 542 continuously agitate the sewage above the isolation plate 56 during operation, so that the flocculant put into the feeding pipe 22 reacts fully with the sewage, improving the flocculation efficiency and reaction effect.

[0047] Example 3: Based on Example 2, this example further utilizes the flotation component 62 and filter screen 63 to separate solid waste, oil, and water, thereby converting the mixed wastewater of oil and solids into pure water, reducing the proportion of insoluble substances in the water, separating these impurities, improving the efficiency of subsequent treatment, reducing the working pressure on subsequent treatment filter media, extending the maintenance cycle, and increasing service life.

[0048] Specifically, to achieve the separation of oil, sewage, and solid waste, refer to... Figure 7 , Figure 8 and Figure 10 The separation structure 6 includes a second isolation plate 61 located below the third isolation plate 56 and fixedly connected to the inner surface of the processing cylinder 2. A flotation component 62 is provided on the outer surface of the central drive column 23 between the second isolation plate 61 and the third isolation plate 56. An annular groove 67 connecting the upper and lower sides of the second isolation plate 61 is opened on the inner surface of the central drive column 23. A filter screen 63 is fixedly connected to the upper part of the inner surface of the annular groove 67. A solenoid valve 64 connected to the waste bin 4 is opened on the inner surface of the processing cylinder 2 above the second isolation plate 61. The solids separated and remaining on the upper side of the second isolation plate 61 are discharged into the waste bin 4 through the solenoid valve 64. Several scrapers 68 that are in close contact with the outer surface of the filter screen 63 are fixedly connected to the upper end of the second isolation plate 61 in an annular distribution.

[0049] After the water enters the upper part of the second isolation plate 61, solid waste will settle at the upper end of the second isolation plate 61, while oil will be suspended at the upper part and driven to rise by buoyancy. The oil will enter the connecting cavity 66 through the flotation component 62 and finally enter the oil storage tank 25 for temporary storage through the oil pipeline 65 and the liquid slip ring 27.

[0050] The water enters the annular groove 67 through the filter screen 63. Furthermore, the scraper 68 set on the isolation plate 61 continuously cleans the filter screen 63 during the rotation of the central drive column 23, causing the water to slowly and continuously pass through the filter screen 63 into the annular groove 67, and then into the water distribution component 73.

[0051] Furthermore, to achieve oil separation, refer to... Figure 9 and Figure 10 The central drive column 23 located inside the flotation assembly 62 has a connecting cavity 66. The bottom wall of the connecting cavity 66 has an oil supply pipe 65 that extends through the central drive column 23 to the height of the liquid slip ring 27. The oil supply pipe 65 is connected to the inner cavity of the liquid slip ring 27 through a through hole on the outer surface of the central drive column 23.

[0052] See Figure 9 The flotation assembly 62 includes a baffle 621 that is slidably connected to the outer surface of the central drive column 23 through a limiting groove. The outer surface of the baffle 621 is provided with a plurality of connecting grooves 622 that communicate with its inner surface. A hollow ring 623 is fixedly connected to the lower part of the outer surface of the baffle 621. The inner surface of the connecting cavity 66 is provided with a plurality of connecting grooves 661 that correspond to the connecting grooves 622 in the vertical direction.

[0053] The hollow ring 623 can drive the baffle 621 to rise under the action of water buoyancy, thereby connecting the first connecting channel 622 and the second connecting channel 661. This allows the oil floating on the upper layer to enter the connecting cavity 66 through the first connecting channel 622 and the second connecting channel 661, and then enter the oil pipeline 65 through the connecting cavity 66. Finally, it enters the oil storage tank 25 for temporary storage via the liquid lubricating ring 27 connected to the oil pipeline 65.

[0054] Example 4: Based on Example 3, this example utilizes the water distribution component 73 to spray the separated water into the filter layer 72. Through the distribution function of the water distribution component 73, the water is evenly sprayed above the filter layer 72 and fully contacts the filter media in the filter layer 72. This promotes the reaction between the activated carbon particles in the filter media and the water, adsorbing small molecules such as organic nutrients and inorganic pollutants in the water. The solid particulate waste contained in the water is further separated by the layered filter media, reducing the proportion of pollutants in the water and realizing the basic treatment process of sewage, simplifying the overall treatment process.

[0055] Specifically, to further adsorb inorganic salts and organic matter in wastewater, refer to... Figure 10 and Figure 11 The ultrafiltration structure 7 includes a hollow plate 71 fixedly connected to the inner surface of the treatment cylinder 2. A filter layer 72 is fixedly installed on the upper end of the hollow plate 71. A water equalization component 73 is provided on the outer surface of the central drive column 23 located on the upper side of the filter layer 72.

[0056] The filter layer 72 is filled with honeycomb structure activated carbon, polyurethane foam and peat, which can adsorb organic nutrients, small molecular particles and some inorganic pollutants in the water. The honeycomb structure can provide more adsorption sites and improve adsorption efficiency. The biological filter media such as polyurethane foam and peat can further degrade pollutants through the metabolism of microorganisms, thereby achieving the adsorption and separation of small molecular pollutants in the water.

[0057] Furthermore, to achieve uniform spraying of water onto the upper side of the filter layer 72, increase the contact area between the water and the filter layer 72, and improve reaction efficiency, refer to... Figure 11 The water distribution component 73 includes a rotating disk 734 sleeved on the outer surface of the oil supply pipe 65 and rotatably connected to the central drive column 23. A gear ring 733 is fixedly connected to the lower end of the rotating disk 734. A gear 732 meshes with the outer surface of the gear ring 733. A small motor 731 is fixedly connected to the lower end of the gear 732 and installed on the inner surface of the central drive column 23. A number of water outlet holes 735 communicating with the inner surface of the rotating disk 734 are distributed in a ring on the outer surface of the rotating disk 734. The upper part of the inner cavity of the rotating disk 734 is connected to the annular groove 67.

[0058] A small motor 731 drives a gear 732 to rotate, which in turn drives a rotating disk 734 to rotate through the meshing of the gear 732 and the gear ring 733. This causes the wastewater flowing down from the annular trough 67 to be agitated. The centrifugal force generated by the rotation of the rotating disk 734 causes the wastewater to come close to the inner wall of the rotating disk 734 and be sprayed out through the water outlet 735, forming an arc-shaped water curtain between the filter layer 72 and the second isolation plate 61. By controlling the rotation speed of the small motor 731, the water curtain can cover different positions on the filter layer 72, thereby promoting full contact between the water and the filter material and improving the adsorption efficiency.

[0059] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A corrugated paper printing wastewater treatment device, comprising a treatment cylinder (2), wherein a waste bin (4) is fixedly connected to the outer surface of the treatment cylinder (2), characterized in that: A water outlet valve (1) is fixedly connected to the lower part of the outer surface of the treatment cylinder (2), a water inlet valve (3) is fixedly connected to the upper end of the treatment cylinder (2), a pretreatment structure (5) is provided on the upper part of the inner surface of the treatment cylinder (2), a separation structure (6) is provided in the middle of the inner surface of the treatment cylinder (2), and an ultrafiltration structure (7) is provided on the lower part of the inner surface of the treatment cylinder (2). The bottom wall of the inner cavity of the processing cylinder (2) is fixedly connected to a drive motor (24) via a motor bracket. The bottom wall of the inner surface of the processing cylinder (2) is rotatably connected to a central drive column (23) that is connected to the waste bin (4) via a belt drive. The bottom wall of the inner surface of the processing cylinder (2) is fixedly connected to a feeder (21). The output end of the feeder (21) is fixedly connected to a feed pipe (22) that communicates with the pretreatment structure (5). The bottom wall of the inner surface of the processing cylinder (2) is fixedly connected to an oil storage tank (25). The lower part of the inner surface of the central drive column (23) is rotatably connected to a liquid slip ring (27) that is fixedly connected to the oil storage tank (25) via a pipe. The lower part of the inner surface of the processing cylinder (2) located below the water outlet valve (1) is fixedly connected to a base plate (26). The pretreatment structure (5) includes a buffer block (51) located on the top wall of the inner cavity of the treatment cylinder (2). The upper end of the buffer block (51) is provided with a spiral water channel (52) communicating with the lower end. The lower end of the buffer block (51) is fixedly connected to an isolation plate (53). The upper end of the isolation plate (53) is provided with a communication port (55) communicating with the lower end. The lower end of the isolation plate (53) is provided with a stirring assembly (54). The spiral water channel (52) is spiral in shape, with its upper side communicating with the water inlet valve (3) and its lower side communicating with the communication port (55). The inner surface of the treatment cylinder (2) located below the stirring assembly (54) is fixedly connected to an isolation plate (3). The upper end of the isolation plate (56) is provided with a magnetic control valve communicating with the lower end. The inner surface of the isolation plate (53) and the inner surface of the stirring assembly (54) are rotatably connected to the outer surface of the central drive column (23). The stirring assembly (54) includes a cross support plate (541) fixedly connected to the central drive column (23). A plurality of stirring shafts (542) are fixedly connected in a ring at the lower end of the cross support plate (541). The upper ends of the plurality of stirring shafts (542) extend through the lower end of the cross support plate (541) to the upper end of the cross support plate (541) and are fixedly connected to a gear (544). A groove (543) is provided at the lower end of the isolation plate (53). A toothed ring (545) that meshes with the adjacent gear (544) is fixedly connected to the inner surface of the groove (543). The separation structure (6) includes a second isolation plate (61) fixedly connected to the inner surface of the processing cylinder (2) below the third isolation plate (56). A flotation component (62) is provided on the outer surface of the central drive column (23) between the second isolation plate (61) and the third isolation plate (56). An annular groove (67) communicating with the upper and lower sides of the second isolation plate (61) is opened on the inner surface of the central drive column (23). A filter screen (63) is fixedly connected to the upper part of the inner surface of the annular groove (67). A solenoid valve (64) communicating with the waste box (4) is opened on the inner surface of the processing cylinder (2) above the second isolation plate (61). Several scrapers (68) that are in close contact with the outer surface of the filter screen (63) are fixedly connected to the upper end of the second isolation plate (61) in an annular distribution. The central drive column (23) located inside the flotation assembly (62) has a connecting cavity (66). The bottom wall of the connecting cavity (66) has an oil delivery pipe (65) that extends through the central drive column (23) to the height of the liquid slip ring (27). The oil delivery pipe (65) is connected to the inner cavity of the liquid slip ring (27) through a through hole on the outer surface of the central drive column (23). The flotation assembly (62) includes a baffle (621) that is slidably connected to the outer surface of the central drive column (23) through a limiting groove. The outer surface of the baffle (621) is provided with a plurality of connecting grooves (622) that communicate with its inner surface. A hollow ring (623) is fixedly connected to the lower part of the outer surface of the baffle (621). The inner surface of the connecting cavity (66) is provided with a plurality of connecting grooves (661) that correspond to the connecting grooves (622) in the vertical direction.

2. The corrugated paper printing wastewater treatment equipment according to claim 1, characterized in that: The ultrafiltration structure (7) includes a hollow plate (71) fixedly connected to the inner surface of the treatment cylinder (2), a filter layer (72) is fixedly installed on the upper end of the hollow plate (71), and a water equalization component (73) is provided on the outer surface of the central drive column (23) located on the upper side of the filter layer (72).

3. The corrugated paper printing wastewater treatment equipment according to claim 2, characterized in that: The water distribution assembly (73) includes a rotating disk (734) sleeved on the outer surface of the oil pipeline (65) and rotatably connected to the central drive column (23). A gear ring (733) is fixedly connected to the lower end of the rotating disk (734). A gear (732) meshes with the outer surface of the gear ring (733). A small motor (731) is fixedly connected to the lower end of the gear (732) and installed on the inner surface of the central drive column (23). A number of water outlet holes (735) communicating with the inner surface of the rotating disk (734) are distributed in a ring on the outer surface of the rotating disk (734). The upper part of the inner cavity of the rotating disk (734) is connected to the annular groove (67).

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