Sewage treatment system

Abstract

The invention relates to the field of sewage treatment, in particular to a sewage treatment system which comprises a decolorizing tank, an adsorption tank, an ozone preparation device and an active coke regeneration device, the upper portion of the decolorizing tank is communicated with a sewage inlet pipe, an aeration disc is arranged in the decolorizing tank, the ozone preparation device is communicated with the aeration disc, and the activated coke regeneration device is arranged in the adsorption tank. The aeration disc is arranged at the bottom of the decolorizing tank, the active coke regeneration device is communicated with a discharge port of the adsorption tank, and a water outlet of the decolorizing tank is communicated with a water inlet of the adsorption tank. The decolorizing device has the effect of improving the decolorizing efficiency.

Description

Technical Field

[0001] The present application relates to the field of sewage treatment, and in particular to a sewage treatment system. Background Art

[0002] In the existing sewage treatment process, the sewage needs to be passed into a decolorization tank for decolorization, and then passed into an adsorption tank to adsorb organic matter in the sewage through activated coke. In the decolorization process, ozone needs to be prepared by an ozone generator, and then the ozone is passed into the decolorization tank so that the ozone reacts with the sewage to decolorize the sewage. The existing technology directly passes ozone into the decolorization tank, which limits the contact reaction area between ozone and sewage, thereby affecting the decolorization efficiency. Summary of the invention

[0003] In order to improve the efficiency of decolorization, the present application provides a sewage treatment system.

[0004] The present application provides a sewage treatment system, which adopts the following technical solution: A sewage treatment system comprises a decolorizing tank, an adsorption tank, an ozone generator, and an activated coke regeneration device, wherein the upper portion of the decolorizing tank is connected to a sewage inlet pipe, an aeration plate is arranged in the decolorizing tank, the ozone generator is connected to the aeration plate, the aeration plate is arranged at the bottom of the decolorizing tank, the activated coke regeneration device is connected to the discharge port of the adsorption tank, the water outlet of the decolorizing tank is connected to the water inlet of the adsorption tank, the upper portion of the decolorizing tank is provided with an exhaust port, and the exhaust port is connected to an ozone destroyer.

[0005] By adopting the above technical solution, an aeration plate is provided in the decolorization tank, and the ozone prepared by the ozone generator is first introduced into the aeration plate, and the aeration plate evenly introduces the ozone into the decolorization tank, thereby increasing the contact reaction area between the ozone and the sewage, thereby improving the decolorization efficiency.

[0006] Optionally, two decolorization tanks are provided, and the water outlet of the first decolorization tank is connected to the water inlet of the second decolorization tank; two adsorption tanks are provided, and the water outlet of the first adsorption tank is connected to the water inlet of the second adsorption tank; the exhaust port of the second decolorization tank is connected to the aeration plate of the first decolorization tank; the discharge port of the adsorption tank is connected to the activated coke regeneration device; and a pneumatic conveying device is provided between the adsorption tank and the activated coke regeneration device.

[0007] By adopting the above technical solution, two decolorization tanks are provided. When the decolorization treatment of the sewage by the previous decolorization tank is not thorough enough, the sewage is treated by another decolorization tank, thereby improving the decolorization treatment degree of the sewage. Two adsorption tanks are provided, which can improve the purification degree of the sewage.

[0008] Optionally, a mixing barrel is provided inside the decolorization tank, and the mixing barrel is rotatably connected to the decolorization tank. The decolorization tank is provided with a first driving member for driving the mixing barrel to rotate, the aeration plate is located at the bottom of the mixing barrel, and the peripheral wall of the mixing barrel is provided with a plurality of through holes for water flow to pass through, and the upper part of the mixing barrel is connected to the sewage inlet pipe.

[0009] By adopting the above technical solution, a mixing barrel is provided, and the aeration plate transports ozone into the mixing barrel. The mixing barrel rotates during the decolorization process, thereby improving the mixing efficiency of ozone and sewage, and then improving the decolorization efficiency of sewage. During the rotation process, the sewage moves in a direction away from the axis of the mixing barrel, making it easier for the treated sewage to be discharged from the outlet.

[0010] Optionally, the mixing barrel is slidably connected to a first stirring member in a vertical direction, and a first transmission assembly is provided at the lower end of the first stirring member. When the mixing barrel rotates, the first transmission assembly can drive the stirring member to slide in the vertical direction.

[0011] By adopting the above technical solution, a first stirring member and a first transmission assembly are provided. When the mixing barrel is rotating, the first transmission assembly can drive the first stirring member to move up and down, which is beneficial to further mixing of sewage and ozone, thereby improving the decolorization efficiency.

[0012] Optionally, the first transmission assembly includes a face gear and a driving rod, wherein the driving rod is arranged on the side wall of the decolorization tank, the face gear is arranged at the lower part of the mixing barrel, the face gear and the mixing barrel are coaxially arranged, and the driving rod abuts against the tooth portion of the face gear.

[0013] By adopting the above technical solution, the driving rod is abutted against the face gear. When the mixing barrel rotates, the face gear will move relative to the driving rod. The tooth portion of the face gear will drive the first stirring member to move up and down through the abutment with the driving rod, thereby stirring the sewage and ozone inside the mixing barrel to improve the decolorization efficiency.

[0014] Optionally, the first stirring member includes a plurality of annular plates and connecting rods, wherein a plurality of the annular plates are provided, the annular plates are coaxially arranged with the mixing barrel, the plurality of the annular plates are distributed along the axial direction, the connecting rods are provided in a plurality of groups, the plurality of groups of connecting rods are respectively located between two annular plates, a plurality of connecting rods are provided in each group, the plurality of connecting rods are arranged in a circular array around the axis of the annular plate, and the two ends of the connecting rods are respectively connected to two adjacent annular plates.

[0015] By adopting the above technical solution, when the annular plate moves up and down, the sewage and ozone in the mixing barrel can be stirred.

[0016] Optionally, a plurality of second stirring members are provided on the annular plate, and the plurality of second stirring members are distributed in a circular array around the axial direction of the annular plate. A second transmission assembly is provided on the annular plate. The second stirring member includes a stirring blade and a first rotating shaft. A plurality of stirring blades are provided, and the plurality of stirring blades are distributed in a circular array around the axis of the first rotating shaft and are arranged on the first rotating shaft. The first rotating shaft is rotatably connected to the annular plate, and the axial direction of the first rotating shaft is horizontally arranged. The second transmission assembly can drive the first rotating shaft to rotate.

[0017] By adopting the above technical solution, when the annular plate moves up and down, the first rotating shaft can be driven to rotate through the second transmission component, thereby driving the stirring blades to stir the sewage and ozone, thereby improving the mixing efficiency.

[0018] Optionally, the second transmission assembly includes a first gear and a rack, the first gear is coaxially arranged on the first rotating shaft, the rack is arranged on the barrel wall of the mixing barrel, and the first gear is connected to the rack.

[0019] By adopting the above technical solution, when the annular plate moves up and down driven by the driving rod and the face gear, the annular plate moves relative to the mixing barrel, while the rack is stationary relative to the mixing barrel. During the movement, the annular plate will drive the first gear to move up and down. Since the first gear and the rack are connected, the first gear will be driven to rotate, thereby driving the first rotating shaft to rotate.

[0020] Optionally, the annular plate is provided with a plurality of groups of guide ports, which are distributed in a circular array around the axis of the annular plate, each group of guide ports includes a plurality of guide ports, and the plurality of guide ports are distributed in a direction away from the axis of the annular plate, the annular plate is provided with a guide plate located at the guide port, a second rotating shaft is provided at both ends of the guide plate, the second rotating shaft is rotatably connected to the annular plate, and when the annular plate moves up and down, the guide plate can guide the sewage in a direction away from the axis of the annular plate.

[0021] By adopting the above technical solution, a guide port and a guide plate are provided. When the annular plate moves downward, the guide plate rotates and faces upward, so that the mixing barrel and the annular plate can guide the sewage in a direction away from the axis of the annular plate during movement, making it easier for the treated sewage to be discharged from the outlet. When the annular plate moves upward, the guide plate rotates and faces downward, thereby guiding the sewage.

[0022] Optionally, the second rotating shaft is provided with a second gear, and the second gear is connected to a rack. When the annular plate moves up and down, the rack can drive the second gear to rotate.

[0023] By adopting the above technical solution, when the annular plate moves downward relative to the mixing barrel, the second gear is engaged with the rack, thereby driving the second gear to rotate, so that the second rotating shaft rotates and tilts upward; when the annular plate moves upward relative to the mixing barrel, the rack can drive the second gear to rotate, so that the second rotating shaft rotates and tilts downward.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. A mixing barrel is provided, and the aeration plate delivers ozone to the mixing barrel. The mixing barrel rotates during the decolorization process, thereby improving the mixing efficiency of ozone and sewage, and further improving the decolorization efficiency of sewage. In the process of rotation, the sewage moves in a direction away from the axis of the mixing barrel, making it easier for the treated sewage to be discharged from the outlet; 2. When the annular plate moves downward relative to the mixing barrel, since the second gear is connected to the rack, the second gear can be driven to rotate, so that the second rotating shaft rotates and tilts upward. When the annular plate moves upward relative to the mixing barrel, the rack can drive the second gear to rotate, so that the second rotating shaft rotates and tilts downward. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of Example 1; Figure 2 is a schematic diagram of the internal structure of the decolorizing tank in Example 2; Figure 3 yes Figure 2 The enlarged schematic diagram of point A in the middle; Figure 4 It is a schematic structural diagram of the second stirring member in Example 2.

[0026] Explanation of reference numerals: 1. decolorizing tank; 11. exhaust pipe; 2. ozone generator; 21. aeration plate; 3. activated coke regeneration device; 31. pneumatic conveying device; 32. second silo; 33. first silo; 4. adsorption tank; 5. mixing barrel; 51. third rotating shaft; 52. first drive motor; 53. third gear; 54. fourth gear; 55. through hole; 56. exhaust hole; 6. first stirring member; 61. annular plate; 611. guide port; 62. connecting rod; 63. sliding rod; 64. first transmission assembly; 641. drive Rod; 642, face gear; 65, guide plate; 651, second rotating shaft; 66, second gear; 67, second transmission gear; 68, third transmission gear; 69, arc plate; 7, second stirring member; 71, first rotating shaft; 72, stirring blade; 73, mounting plate; 74, second transmission assembly; 741, first gear; 742, rack; 743, first transmission gear; 8, first pipeline; 81, second pipeline; 82, third pipeline; 83, fourth pipeline; 84, first valve; 85, second valve; 9, ozone destroyer. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1-4 This application is described in further detail.

[0028] Embodiment 1: Example 1 of the present application discloses a sewage treatment system. Figure 1 , comprising a decolorizing tank 1, an adsorption tank 4, an ozone generator 2, an activated coke regeneration device 3 and a first silo 31. The upper part of the decolorizing tank 1 is connected with a sewage inlet pipe. In this embodiment, the sewage inlet pipe is fixedly connected to the outer peripheral wall of the decolorizing tank 1 at the upper part, and the water outlet of the decolorizing tank 1 is located at the lower part of the decolorizing tank 1. An aeration plate 21 is arranged in the decolorizing tank 1, and the aeration plate 21 is located inside the decolorizing tank 1 and fixedly connected to the bottom wall of the decolorizing tank 1.

[0029] Reference Figure 1The ozone generator 2 is connected with a first pipeline 8, which is connected to the aeration plate 21. An air pump is fixedly installed in the middle of the first pipeline 8. The air pump can transport ozone to the aeration plate 21, and the aeration plate 21 uniformly transports ozone to the decolorization tank 1. The water outlet of the decolorization tank 1 is connected to the water inlet of the adsorption tank 4, and the water outlet of the adsorption tank 4 is connected to the water storage tank. Active coke is arranged in the adsorption tank 4. The discharge port of the adsorption tank 4 is provided with a third pipeline 82, and the third pipeline 82 is connected to the first silo 31. The discharge port of the first silo 31 is connected to the active coke regeneration device 3. A pneumatic conveying device 31 is fixedly installed in the middle of the third pipeline 82. The pneumatic conveying device 31 can transport the active coke in the adsorption tank 4 to the first silo through the discharge port of the adsorption tank 4. The first silo 31 then transports the active coke to the active coke regeneration device 3. The active coke regeneration device 3 can process the used active coke so that the processed active coke can be reused.

[0030] Reference Figure 1 There are two decolorization tanks 1, the water outlet of the previous decolorization tank 1 is connected to the water inlet of the next decolorization tank 1, and there are two adsorption tanks 4, the water outlet of the previous adsorption tank 4 is connected to the water inlet of the next adsorption tank 4, and the water outlet of the next decolorization tank 1 is connected to the water inlet of the first adsorption tank 4.

[0031] An exhaust port is provided at the upper part of the decolorization tank 1. The exhaust port of the previous decolorization tank 1 is connected to the ozone destroyer 9, and the exhaust port of the subsequent decolorization tank 1 is connected to the second pipe 81. The second pipe 81 is connected to the first pipe 8, so that the unused ozone in the subsequent decolorization tank 1 can be re-injected into the aeration disk 21 of the previous decolorization tank 1.

[0032] Referring to the figure, the activated coke regeneration device 3 is provided with a second silo 32, and the second silo 32 is connected to the activated coke regeneration device 3. The activated coke regeneration device 3 transports the processed activated coke to the second silo 32. The discharge port of the second silo 32 is connected to a fourth pipeline 83. The fourth pipeline 83 is connected to the third pipeline 82 and is located on the side of the pneumatic conveying device 31 close to the activated coke regeneration device 3. In this embodiment, the conveying direction of the pneumatic conveying device 31 can be converted. Through the fourth pipeline 83 and the pneumatic conveying device 31, the processed activated coke in the second silo 32 can be re-transported to the adsorption tank 4 through the discharge port in the adsorption tank 4. The third pipeline 82 is located at one end of the pneumatic conveying device 31 close to the activated coke regeneration device 3 and is fixedly installed with a first valve 84. The fourth pipeline 83 is fixedly installed with a second valve 85. When the pneumatic conveying device 31 needs to convey the activated coke in the adsorption tank 4 to the activated coke regeneration device 3, the first valve 84 is opened and the second valve 85 is closed. When the pneumatic conveying device 31 needs to convey the activated coke in the second silo 32 to the adsorption tank 4, the first valve 84 is closed and the second valve 85 is opened.

[0033] The implementation principle of Example 1 of the present application is as follows: an aeration plate 21 is provided in the decolorization tank 1, and the ozone prepared by the ozone generator 2 is first introduced into the aeration plate 21, and the aeration plate 21 evenly introduces the ozone into the decolorization tank 1, thereby increasing the contact reaction area between the ozone and the sewage, thereby improving the decolorization efficiency.

[0034] Embodiment 2: The difference between Example 2 and Example 1 is that, referring to Figure 2 Taking the first decolorizing tank as an example, a mixing barrel 5 is arranged inside the decolorizing tank 1, and the mixing barrel 5 and the decolorizing tank 1 are coaxially arranged. A plurality of exhaust holes 56 are opened through the upper end surface of the mixing barrel 5, and an exhaust pipe 11 is connected to the upper part of the decolorizing tank, and the exhaust pipe 11 is connected to the ozone destroyer 2. The end surface of the lower end of the mixing barrel 5 is coaxially fixedly connected with a third rotating shaft 51, and the third rotating shaft 51 is rotatably arranged in the decolorizing tank 1. The decolorizing tank 1 is provided with a first driving member for driving the mixing barrel 5 to rotate, and the first driving member is a first driving motor 52, and the first driving motor 52 is fixedly connected to the bottom wall of the decolorizing tank 1. The end of the third rotating shaft 51 located outside the decolorizing tank 1 is coaxially fixedly connected with a third gear 53, and the output shaft of the first driving motor 52 is coaxially fixedly connected with a fourth gear 54, and the fourth gear 54 is meshed with the third gear 53. When the first driving motor 52 rotates, the third gear 53 can be driven to rotate through the fourth gear 54, thereby driving the third rotating shaft 51 and the mixing barrel 5 to rotate.

[0035] Reference Figure 2 The aeration plate 21 is located inside the mixing barrel 5, and the aeration plate 21 is fixedly connected to the bottom wall of the mixing barrel 5. The middle part of the third rotating shaft 51 is hollow, and the end of the third rotating shaft 51 away from the third gear 53 is connected to the aeration plate 21. The ozone generator 2 is connected to the end of the third rotating shaft 51 away from the aeration plate 21 through a rotary joint. The peripheral wall of the mixing barrel 5 is provided with a plurality of through holes 55 for water flow to pass through. The upper part of the mixing barrel 5 is connected to a sewage inlet pipe, and the sewage inlet pipe transports sewage into the mixing barrel 5.

[0036] Reference Figure 2 The mixing barrel 5 is slidably connected to the first stirring member 6 in the vertical direction, and a first transmission assembly 64 is provided at the lower end of the first stirring member 6. When the mixing barrel 5 rotates, the first transmission assembly 64 can drive the first stirring member 6 to slide in the vertical direction.

[0037] Reference Figure 2The first stirring member 6 includes a plurality of annular plates 61 and connecting rods 62. A plurality of annular plates 61 are provided. The annular plates 61 are coaxially arranged with the mixing barrel 5, and the plurality of annular plates 61 are distributed along the axis direction. A plurality of connecting rods 62 are provided. The plurality of connecting rods 62 are respectively located between two annular plates 61. Each group of connecting rods 62 is provided with a plurality of connecting rods, and the plurality of connecting rods 62 are arranged in a circumferential array around the axis of the annular plate 61. The axis direction of the connecting rod 62 is parallel to the axis direction of the mixing barrel 5, and the two ends of the connecting rod 62 are respectively fixedly connected to the side surfaces of two adjacent annular plates 61.

[0038] Reference Figure 2 The first stirring member 6 further includes a sliding rod 63, which is located below the lowest annular plate 61. Two sliding rods 63 are provided, and the two sliding rods 63 are symmetrically arranged around the axis direction of the annular plate 61. The axis direction of the sliding rod 63 is parallel to the axis direction of the mixing barrel 5. The upper end of the sliding rod 63 is fixedly connected to the lower surface of the lowest annular plate 61, and the lower end of the sliding rod 63 is slidably arranged to penetrate the aeration plate 21 and the bottom wall of the mixing barrel 5 in sequence.

[0039] Reference Figure 2 The first transmission assembly 64 includes a face gear 642 and a driving rod 641. The driving rod 641 is arranged on the side wall of the decolorizing tank 1. The axial direction of the driving rod 641 is parallel to the radial direction of the decolorizing tank 1. The face gear 642 is fixedly connected to the lower surface of a plurality of sliding rods 63. The face gear 642 and the annular plate 61 are arranged concentrically. The driving rod 641 abuts against the tooth surface of the face gear 642. In this embodiment, a plurality of driving rods 641 are arranged. The plurality of driving rods 641 are distributed in a circumferential array around the axis of the decolorizing tank 1. The plurality of driving rods 641 abut against the face gear 642 at the same time. Only one of the driving rods 641 is shown in the drawings of the specification. When the mixing barrel 5 rotates, the face gear 642 is driven to rotate. At this time, the driving rod 641 and the face gear 642 will have corresponding displacements. The driving rod 641 will abut against different positions of the tooth shape of the face gear 642, thereby driving the sliding ring to move up and down relative to the mixing barrel 5, thereby driving the annular plate 61 to stir the interior of the mixing barrel 5.

[0040] Reference Figure 2 and Figure 3A plurality of second stirring members 7 are arranged on the annular plate 61, and the plurality of second stirring members 7 are distributed in a circular array around the axial direction of the annular plate 61. The second stirring member 7 includes a stirring blade 72 and a first rotating shaft 71. A plurality of stirring blades 72 are arranged, and the plurality of stirring blades 72 are distributed in a circular array around the axis of the first rotating shaft 71. The length direction of the stirring blade 72 is parallel to the axial direction of the first rotating shaft 71, and the axial direction of the first rotating shaft 71 is horizontally arranged. The stirring blade 72 is fixedly connected to the peripheral wall of the first rotating shaft 71. Both ends of the first rotating shaft 71 are provided with mounting plates 73, and the mounting plates 73 are fixedly connected to the upper surface of the annular plate 61. Both ends of the first rotating shaft 71 are rotatably connected to the mounting plates 73 respectively.

[0041] Reference Figure 2 and Figure 3 , a plurality of groups of second transmission components 74 are arranged on the annular plate 61, and the plurality of groups of second transmission components 74 correspond to the plurality of second stirring members 7 respectively, and the second transmission components 74 can drive the first rotating shaft 71 to rotate. The second transmission component 74 includes a first gear 741, a rack 742 and a first transmission gear 743, the first gear 741 is coaxially fixedly connected to one end of the first rotating shaft 71, the first gear 741 is located on the side of one of the mounting plates 73 away from the stirring blade 72, the rack 742 is fixedly connected to the barrel wall of the mixing barrel 5, and the length direction of the rack 742 is vertically arranged. A plurality of first transmission gears 743 are arranged, and the plurality of first transmission gears 743 are distributed along the radial direction of the annular plate 61, the first transmission gears 743 are rotatably connected to the annular plate 61, the first transmission gears 743 are meshed with each other, and the first and last first transmission gears 743 are respectively meshed with the first gear 741 and the rack 742.

[0042] Reference Figure 2 and Figure 3 The annular plate 61 is provided with a plurality of groups of guide ports 611, which are distributed in a circumferential array around the axis of the annular plate 61. The number of each group of guide ports 611 is set to be multiple, and the plurality of guide ports 611 are distributed in a direction away from the axis of the annular plate 61. The guide ports 611 are in an arc shape, and the annular plate 61 is provided with a guide plate 65 located at the guide port 611. The shape of the guide plate 65 is adapted to the shape of the guide port 611. Both ends of the guide plate 65 are fixedly connected with a second rotating shaft 651. The upper and lower surfaces of the annular plate 61 are provided with an arc plate 69, which covers the second rotating shaft 651, so that the guide plate 65 is hinged to the annular plate 61. When the annular plate 61 moves up and down, the guide plate 65 can guide the sewage in a direction away from the axis of the annular plate 61 so that the treated sewage flows out of the mixing barrel 5 and flows out from the drain port.

[0043] Reference Figure 4, one end of a second rotating shaft 651 is coaxially fixedly connected to a second gear 66. In this embodiment, each group of guide ports 611 includes two guide ports 611, and a second transmission gear 67 is arranged between the two second gears 66. The second transmission gear 67 is rotatably connected to the annular plate 61, and the second transmission gear 67 is respectively meshed with the two second gears 66. A third transmission gear 68 is arranged between the second gear 66 and the rack 742 on the side away from the axis of the annular plate 61. The third transmission gear 68 is rotatably connected to the annular plate 61. There are a plurality of third transmission gears 68. A plurality of second transmission gears 67 are distributed along the radial direction of the annular plate 61. The number of third transmission gears 68 is even times, so that the rotation direction of the second gear 66 is the same as the rotation direction of the third transmission gear 68 close to the rack 742. In this embodiment, the number of third transmission gears 68 is two, and the two third transmission gears 68 are respectively meshed with the second gear 66 and the rack 742. The width of the rack 742 is wider, so that the third transmission gear 68 and the first transmission gear 743 can be meshed with the rack 742 at the same time.

[0044] The implementation principle of Example 2 is as follows: when the annular plate 61 moves downward relative to the mixing barrel 5, since the third transmission gear 68 is engaged with the rack 742, the third transmission gear 68 can be driven to rotate, thereby driving the second gear 66 to rotate, so that the second rotating shaft 651 rotates and tilts upward, thereby guiding the sewage in the axial direction away from the mixing barrel 5; when the annular plate 61 moves upward relative to the mixing barrel 5, the rack 742 can drive the second gear 66 to rotate, so that the second rotating shaft 651 rotates and tilts downward, thereby guiding the sewage in the axial direction away from the mixing barrel 5.

[0045] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A sewage treatment system, characterized in that: The invention comprises a decolorizing tank (1), an adsorption tank (4), an ozone generator (2), and an activated coke regeneration device (3). The upper portion of the decolorizing tank (1) is connected to a sewage inlet pipe. An aeration plate (21) is arranged inside the decolorizing tank (1). The ozone generator (2) is connected to the aeration plate (21). The aeration plate (21) is arranged at the bottom of the decolorizing tank (1). The activated coke regeneration device (3) is connected to the discharge port of the adsorption tank (4). The water outlet of the decolorizing tank (1) is connected to the water inlet of the adsorption tank (4). The upper portion of the decolorizing tank (1) is provided with an exhaust port, and the exhaust port is connected to an ozone destroyer (9).

2. A sewage treatment system according to claim 1, characterized in that: Two decolorizing tanks (1) are provided, the water outlet of the first decolorizing tank (1) is connected to the water inlet of the second decolorizing tank (1), two adsorption tanks (4) are provided, the water outlet of the first adsorption tank (4) is connected to the water inlet of the second adsorption tank (4), the exhaust port of the second decolorizing tank (1) is connected to the aeration plate of the first decolorizing tank (1), the discharge port of the adsorption tank (4) is connected to the activated coke regeneration device (3), and a pneumatic conveying device (31) is provided between the adsorption tank (4) and the activated coke regeneration device (3).

3. A sewage treatment system according to claim 1, characterized in that: A mixing barrel (5) is arranged inside the decolorizing tank (1), and the mixing barrel (5) is rotatably connected to the decolorizing tank. The decolorizing tank (1) is provided with a first driving member for driving the mixing barrel (5) to rotate. The aeration plate (21) is located at the bottom of the mixing barrel (5). The peripheral wall of the mixing barrel (5) is provided with a plurality of through holes (55) for water flow to pass through. The upper part of the mixing barrel (5) is connected to a sewage inlet pipe.

4. A sewage treatment system according to claim 3, characterized in that: The mixing barrel (5) is slidably connected to a first stirring member (6) in a vertical direction, and a first transmission assembly (64) is provided at the lower end of the first stirring member (6). When the mixing barrel (5) rotates, the first transmission assembly (64) can drive the stirring member to slide in the vertical direction.

5. A sewage treatment system according to claim 4, characterized in that: The first transmission assembly (64) comprises a face gear (642) and a driving rod (641); the driving rod (641) is arranged on the side wall of the decolorizing tank (1); the face gear (642) is arranged at the bottom of the mixing barrel (5); the face gear (642) and the mixing barrel (5) are coaxially arranged; and the driving rod (641) abuts against the tooth portion of the face gear (642).

6. A sewage treatment system according to claim 4, characterized in that: The first stirring member (6) comprises a plurality of annular plates (61) and connecting rods (62), wherein a plurality of the annular plates (61) are provided, the annular plates (61) are coaxially arranged with the mixing barrel (5), the plurality of the annular plates (61) are distributed along the axial direction, the connecting rods (62) are provided in a plurality of groups, the plurality of groups of the connecting rods (62) are respectively located between two annular plates (61), each group of the connecting rods (62) comprises a plurality of the connecting rods (62), the plurality of the connecting rods (62) are arranged in a circular array around the axis of the annular plate (61), and the two ends of the connecting rods (62) are respectively connected to two adjacent annular plates (61).

7. A sewage treatment system according to claim 6, characterized in that: A plurality of second stirring members (7) are arranged on the annular plate (61), and the plurality of second stirring members (7) are distributed in a circular array around the axis direction of the annular plate (61). A second transmission assembly (74) is arranged on the annular plate (61). The second stirring member (7) comprises a stirring blade (72) and a first rotating shaft (71). A plurality of stirring blades (72) are arranged, and the plurality of stirring blades (72) are distributed in a circular array around the axis of the first rotating shaft (71) and are arranged on the first rotating shaft (71). The first rotating shaft (71) is rotatably connected to the annular plate (61), and the axis direction of the first rotating shaft (71) is arranged horizontally. The second transmission assembly (74) can drive the first rotating shaft (71) to rotate.

8. A sewage treatment system according to claim 7, characterized in that: The second transmission assembly (74) comprises a first gear (741) and a rack (742); the first gear (741) is coaxially arranged on the first rotating shaft (71); the rack (742) is arranged on the barrel wall of the mixing barrel (5); and the first gear (741) and the rack (742) are connected.

9. A sewage treatment system according to claim 8, characterized in that: The annular plate (61) is provided with a plurality of groups of guide openings (611), the plurality of groups of guide openings (611) being distributed in a circular array around the axis of the annular plate (61), each group of guide openings (611) comprising a plurality of guide openings (611), the plurality of guide openings (611) being distributed in a direction away from the axis of the annular plate (61), the annular plate (61) being provided with a guide plate (65) located at the guide opening (611), second rotating shafts (651) being provided at both ends of the guide plate (65), the second rotating shaft (651) being rotatably connected to the annular plate (61), and when the annular plate (61) moves up and down, the guide plate (65) can guide sewage in a direction away from the axis of the annular plate (61).

10. A sewage treatment system according to claim 9, characterized in that: The second rotating shaft (651) is provided with a second gear (66), and the second gear (66) is connected to the rack (742). When the annular plate (61) moves up and down, the rack (742) can drive the second gear (66) to rotate.

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