Ozone-powdered activated carbon coupled biological fluidized bed for treating sewage

Abstract

The invention discloses an ozone-powdered activated carbon coupled biological fluidized bed for treating sewage, which comprises a bed body, and an ozone adding area, a supporting layer and an activated carbon fluidization layer which are sequentially arranged in the bed body from bottom to top, and also comprises a gas supply pipe and a plurality of adding devices arranged on the gas supply pipe, the air supply pipe is annular; the adding device comprises an air outlet pipe and a supporting frame, the supporting frame enables the air outlet pipe to be installed on the air supply pipe, and the air outlet pipe communicates with the air supply pipe through a hose; the length middle part of the adding device is rotationally connected with the supporting frame; one end of the adding device is an air outlet end, the side wall of the other end of the adding device is fixedly connected with a water baffle, and the water baffle controls the air outlet pipe to turn over through self gravity and received water flow impact force; a top cover is fixedly installed at the air outlet end, an adjusting cover is arranged on the inner side wall of the top cover in an attached mode, and air outlet holes are formed in the adjusting cover and the top steel. The purpose of automatically adjusting the addition amount of ozone is achieved.

Description

Technical Field

[0001] The invention relates to the field of water treatment, in particular to an ozone-powdered activated carbon coupled biological fluidized bed for treating sewage. Background Art

[0002] Surface water has gradually become one of the main sources of drinking water. However, surface water in many areas is polluted to varying degrees, especially organic matter, ammonia nitrogen, turbidity and other indicators are high, which poses a severe test to the conventional drinking water treatment process. Traditional conventional water purification processes such as flocculation, sedimentation, filtration, disinfection, etc. may have limitations when dealing with some complex pollution problems. It is difficult to effectively remove certain stubborn pollutants. As the degree of pollution increases, the processing capacity and efficiency of conventional treatment processes are increasingly insufficient. In order to overcome the defects of conventional processes, ozone + activated carbon filter process is often used to deeply treat drinking water. Although the efficiency of pollutant removal is improved to a certain extent, the process flow is lengthened, the efficiency improvement is not obvious, and the operating cost increases sharply.

[0003] However, in some water treatment processes, the ozone output is consistent during the ozone addition step and cannot be changed with the change of water flow. This results in a waste of ozone and also in that the ozone concentration is too high and the water flow is reduced, causing ozone to overflow into the workshop, which can easily pollute the environment and affect the health of the workers. Summary of the invention

[0004] The present application provides an ozone-powdered activated carbon coupled biological fluidized bed for treating sewage, which adopts the following technical solution: An ozone-powdered activated carbon coupled biological fluidized bed for treating sewage, comprising a bed body, an ozone adding zone, a supporting layer, and an activated carbon fluidized layer arranged inside the bed body from bottom to top, and also comprising an air supply pipe arranged in the ozone adding zone and a plurality of adding devices arranged on the air supply pipe; The air supply pipe is in a circular shape, and a plurality of adding devices are located inside the air supply pipe and are evenly distributed around the center of the air supply pipe; The adding device includes an air outlet pipe and a support frame, wherein the air outlet pipe can be installed on the air supply pipe, and the air outlet pipe and the air supply pipe are connected through a hose; The middle part of the length of the adding device is rotatably connected to the support frame, so that the adding device can be turned over along the connection; One end of the adding device is the air outlet end, and a water baffle is fixedly connected to the side wall of the other end. The water baffle controls the air outlet pipe to flip by its own gravity and the impact of the water flow. A top cover is fixedly installed at the air outlet end, an adjusting cover is fitted on the inner wall of the top cover, air outlet holes are opened on the adjusting cover and the top cover, and the adjusting cover can be turned and rotated along with the air outlet pipe to control the misalignment or overlap of the air outlet holes on the adjusting cover and the top cover.

[0005] By adopting the above technical solution, when the water flow changes, the water baffle can control the outlet end of the outlet pipe to flip downward or upward according to the size of the water flow and the interaction of its own gravity, thereby automatically controlling the amount of ozone added according to the water flow, avoiding excessive ozone concentration in the wastewater, and making the working environment safer for the staff.

[0006] Optionally, the top cover and the adjusting cover are both truncated cone shaped, and the air outlet is located on the surface of the top cover and the adjusting cover, so that the air outlet is inclined compared to the air outlet pipe.

[0007] By adopting the above technical solution, the surfaces of the truncated cone-shaped top cover and the adjusting cover are inclined, so that the air outlet holes opened on the top cover are inclined, which can make the ozone sprayed over a larger range and facilitate the integration of ozone into the wastewater. The truncated cone-shaped top cover and the adjusting cover can also be more conveniently matched together, reducing the probability of the top cover and the adjusting cover detaching.

[0008] Optionally, a baffle is fixedly connected to the top of the regulating cover, and the baffle protrudes from the top of the top cover and fits with the end surface of the top cover.

[0009] By adopting the above technical solution, the baffle and the frustum-shaped adjustment cover cooperate to make the adjustment cover fit better inside the top cover, reduce the gap between the adjustment cover and the top cover, and make the ozone spray amount more accurately controlled.

[0010] Optionally, the support frame is composed of two support plates, which are arranged transversely and in parallel, and one end of the support plate is fixedly connected to the air supply pipe; A transverse axis is arranged between the ends of the two support plates away from the air supply pipe, and the two ends of the transverse axis are respectively fixedly connected to the two support plates; The middle part of the length of the air outlet pipe is rotatably connected to the horizontal axis, the interior of the horizontal axis is hollow, and a plurality of rectangular holes are opened on the part of the horizontal axis located inside the air outlet pipe; One end of the hose is connected to the air supply pipe, and the other end of the hose is fixedly connected to the end of the horizontal axis.

[0011] By adopting the above technical solution, ozone can be provided to the air outlet pipe more conveniently without affecting the turning over of the air outlet pipe.

[0012] Optionally, an adjusting device is provided inside the air outlet pipe, the adjusting device comprises a rotating shaft arranged parallel to the horizontal axis and a transmission shaft arranged perpendicular to the horizontal axis, and the rotating shaft is located between the horizontal axis and the air outlet end; A gear is coaxially fixedly connected to the rotating shaft, and a circle of tooth grooves is evenly arranged on the peripheral surface of the horizontal shaft around the axis of the horizontal shaft, and the gears are meshed with the tooth grooves; The transmission shaft and the rotating shaft are linked through a bevel gear set, and one end of the transmission shaft away from the horizontal axis is fixedly connected with the adjusting cover.

[0013] By adopting the above technical solution, when the outlet pipe is flipped, the adjusting device can automatically adjust the overlap between the air outlet holes on the top cover and the adjusting cover, so as to better control the amount of ozone sprayed, ensuring that the amount of ozone sprayed meets the requirements of the current water flow size and does not cause too much or too little ozone.

[0014] Optionally, there are two gears, and the two gears are respectively arranged on both sides of the bevel gear.

[0015] By adopting the above technical solution, the cooperation of the two gears can make the rotation of the rotating shaft more stable, and avoid the rotating shaft being tilted due to uneven force during the rolling of the gears.

[0016] Optionally, the activated carbon fluidized layer consists of two layers, and the diameters of activated carbon particles in the two layers are different, and the layer with a relatively large diameter of activated carbon fluidized layer particles is located below the layer with a relatively small diameter of activated carbon fluidized layer particles.

[0017] By adopting the above technical solution, there are two activated carbon fluidized layers with activated carbon particle diameters at the same time, which can make the activated carbon fluidized layer suitable for treating wastewater with different concentrations.

[0018] Optionally, an isolation layer is provided between the two activated carbon fluidized layers, and the isolation layer is filled with pebbles.

[0019] By adopting the above technical solution, the pebbles can isolate the two layers of activated carbon fluidized layers, avoiding the mixing of activated carbon particles of two diameters and affecting the fluidization effect of the activated carbon fluidized layer.

[0020] In summary, 1. The air outlet pipe can be turned over. When the water flow changes, the air outlet pipe will automatically turn over, and the regulator will also rotate accordingly, so that the amount and position of the sprayed ozone will change in the bed, so that the ozone concentration in the wastewater will not be too high or too low due to the change of water flow, avoiding ozone overflow and making the working environment safer for the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the overall structure of the fluidized bed in the embodiment.

[0022] Figure 2 is a cross-sectional view of the interior of the fluidized bed in the embodiment.

[0023] Figure 3Schematic diagram of the ozone addition zone in the embodiment.

[0024] Figure 4 Schematic diagram of the structure of the ozone adding device in the embodiment.

[0025] Figure 5 It is a cross-sectional view of the ozone adding device in the embodiment.

[0026] Figure 6 Schematic diagram of the structure of the adjusting cover in the embodiment.

[0027] Figure 7 yes Figure 5 Enlarged view of part A in the middle.

[0028] Description of reference numerals: 1. Bed; 11. Water inlet pipe; 12. Water outlet pipe; 2. Ozone adding area; 3. Support layer; 31. Support net; 32. Pebbles; 4. Activated carbon fluidized layer; 5. Air supply pipe; 51. Connecting plate; 6. Adding device; 61. Air outlet pipe; 611. Air outlet end; 612. Water baffle; 613. Top cover; 614. Air outlet hole; 615. Adjusting cover; 616. Limiting plate; 617. Disc; 618. Hole; 619. Limiting ring; 62. Support frame; 621. Support plate; 622. Horizontal axis; 623. Rectangular hole; 624. Tooth groove; 63. Adjusting device; 631. Rotating shaft; 632. Gear; 633. Transmission shaft; 634. Bevel gear assembly; 7. Hose; 8. Air inlet pipe. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-7 This application is described in further detail.

[0030] The present application embodiment discloses an ozone-powdered activated carbon coupled biological fluidized bed for treating wastewater. Figure 1 and Figure 2 The biological fluidized bed includes a bed body 1 and an ozone adding zone 2, a supporting layer 3, and an activated carbon fluidized layer 4 which are sequentially arranged inside the bed body 1 from bottom to top. The ozone adding zone 2 is mainly used to add ozone to the sewage, the supporting layer 3 is used to support the activated carbon fluidized layer 4 to facilitate the placement of activated carbon, and the activated carbon fluidized layer 4 is mainly used to adsorb and remove various substances in the sewage.

[0031] Reference Figure 1 and Figure 2A water inlet pipe 11 is connected to the side wall of the bed body 1 near the bottom, and a water outlet pipe 12 is fixedly connected to the top of the bed body 1; sewage enters the bed body 1 through the water inlet pipe 11, is added with ozone through the ozone adding zone 2, and is fluidized through the activated carbon fluidized layer 4, which can better treat the sewage. The wastewater flows from bottom to top through the activated carbon fluidized layer to make the activated carbon in a flowing state, thereby increasing the contact area between the activated carbon and the wastewater and providing sufficient oxygen per unit time, and utilizing or sticking to the boiling state to strengthen the structure of the wastewater biological treatment process, thereby improving the treatment effect of the sewage.

[0032] Reference Figure 2 The supporting layer 3 includes a supporting net 31 fixedly connected to the inside of the bed body 1 and pebbles 32 laid on the supporting net 31. The supporting net 31 is mesh-shaped, one is to facilitate the laying of the pebbles 32, and the other is to facilitate the passage of wastewater; the pebbles 32 have four different particle sizes, and the particle size decreases from bottom to top, which is convenient for the passage of wastewater and can also support the activated carbon.

[0033] The activated carbon fluidized layer 4 is paved with two layers of activated carbon with different particle sizes, with the relatively large particle size located above the relatively small particle size. The activated carbon with different particle sizes can be used for wastewater with different flow rates, and the two layers of activated carbon fluidized layers 4 are also separated by pebbles 32 to prevent the activated carbon particles of the two layers from mixing. When the water flow is small, the impact force of the water flow will not be too large, so the activated carbon particles in the lower layer will not be washed too loose. When the water flow is large, the impact force of the water flow increases, and the activated carbon particles in the lower layer are looser, and the contact area between the activated carbon and the wastewater increases, which improves the fluidization reaction; when the water flow is small, the flow rate is further reduced when passing through the activated carbon fluidized layer 4 with small particles, and when passing through the activated carbon fluidized layer 4 with large particles, it can react better.

[0034] Reference Figure 3 A circular air supply pipe 5 is provided in the ozone adding zone 2, and a plurality of ozone adding devices 6 are provided in the inner circle of the air supply pipe 5, and the plurality of adding devices 6 are evenly distributed around the center of the air supply pipe 5; the adding device 6 is connected to the air supply pipe 5 through a hose 7, and an air intake pipe 8 is connected to the air supply pipe 5, and the air intake pipe 8 can introduce ozone into the air supply pipe 5, and the air supply pipe 5 provides ozone for the plurality of adding devices 6, and the adding device 6 can add ozone to the ozone adding zone 2 so that the ozone is integrated into the wastewater.

[0035] Reference Figure 4The adding device 6 includes an air outlet pipe 61 and a support frame 62 for connecting the air outlet pipe 61; the support frame 62 is composed of two support plates 621, the support plate 621 is arranged horizontally, one end of the support plate 621 is fixedly connected to the air supply pipe 5, the two support plates 621 are arranged in parallel, and a transverse axis 622 is arranged at one end of the two support plates 621 away from the air supply pipe 5, and the two ends of the transverse axis 622 are respectively fixedly connected to the two support plates 621, the middle part of the length of the air outlet pipe 61 passes through the transverse axis 622, and the air outlet pipe 61 and the transverse axis 622 are rotatably connected, so that the air outlet pipe 61 can rotate around the transverse axis 622; one end of the air outlet pipe 61 is the air outlet end 611, and the other end of the air outlet pipe 61 is fixedly connected with a semicircular water baffle 612, and one end of the straight side of the water baffle 612 is fixedly connected to the air outlet pipe 61, and one end of the arc side of the water baffle 612 is inclined in the direction away from the air outlet end 611. When the water flow is small, the air outlet pipe 61 is arranged vertically, and the air outlet end 611 is arranged upward. Because the water flow is small, the flow rate is slow, so the air outlet end 611 is upward, so that the position where ozone is integrated into the wastewater is closer to the activated carbon fluidized layer 4, so that the ozone concentration in the wastewater will not be too high. After passing through the activated carbon fluidized layer 4, the ozone concentration in the treated water reaches a safe value. In the subsequent water treatment process, ozone will not overflow, avoiding pollution to the environment and improving the safety of the working environment of the staff.

[0036] When the water flow is too large, the water flow will impact the water baffle 612, exerting thrust on the water baffle 612, causing the air outlet pipe 61 to rotate, thereby causing the air outlet end 611 to tilt downward, thereby making the ozone addition position farther away from the activated carbon fluidized layer 4, so that the ozone can have more time to be integrated into the wastewater, so that the ozone concentration in the wastewater can meet the standard, and avoid the ozone integration time being too short due to excessive water flow, so that the ozone concentration in the wastewater does not meet the standard.

[0037] A connecting plate 51 is fixedly connected between the air supply pipe 5 and the bed 1. The connecting plate 51 enables the air supply pipe 5 to be installed inside the bed 1 and can also block wastewater so that wastewater can only pass through the inner circle of the air supply pipe 5, thereby allowing ozone to be better integrated into the wastewater.

[0038] Reference Figure 5 One end of the hose 7 is fixedly connected to the air supply pipe 5, and the other end of the hose 7 is fixedly connected to one end of the horizontal axis 622. The interior of the horizontal axis 622 is hollow, and the horizontal axis 622 is located on the circumferential surface inside the air outlet pipe 61, and is provided with a plurality of rectangular holes 623. The rectangular holes 623 are evenly distributed around the axis of the horizontal axis 622, so that the air supply pipe 5 can provide ozone to the interior of the air outlet pipe 61.

[0039] An adjusting device 63 is also provided inside the adding device 6. The adjusting device 63 includes a rotating shaft 631 arranged parallel to the horizontal axis 622 and a gear 632 fixed on the rotating shaft 631. The gear 632 and the rotating shaft 631 are coaxially arranged. Both ends of the rotating shaft 631 are rotatably connected to the inside of the air outlet pipe 61. The rotating shaft 631 can rotate along its own axis. A circle of tooth grooves 624 is provided on the circumference of the corresponding gear 632 on the horizontal axis 622. The tooth grooves 624 are meshed with the gear 632. When the air outlet pipe 61 rotates, the gear 632 rolls in the tooth grooves 624, so that the rotating shaft 631 can rotate.

[0040] The adjusting device 63 also includes a transmission shaft 633, which is located at the axis of the outlet pipe 61, and between the transverse axis 622 and the outlet end 611. The transmission shaft 633 is perpendicular to the rotating shaft 631, and the transmission shaft 633 and the rotating shaft 631 are connected by a bevel gear set 634. When the rotating shaft 631 rotates, it can drive the transmission shaft 633 to rotate along its own axis.

[0041] Reference Figure 4 and Figure 5 , a truncated cone-shaped top cover 613 is provided at the outlet end 611, and a plurality of air outlet holes 614 are provided on the surface of the top cover 613. A layer of adjusting cover 615 is provided inside the top cover 613, and a plurality of air outlet holes 614 are also provided on the adjusting cover 615. The transmission shaft 633 is fixedly connected to the adjusting cover 615, and the transmission shaft 633 can drive the adjusting cover 615 to rotate, thereby controlling the overlap or misalignment of the air outlet holes 614 on the top cover 613 and the adjusting cover 615, and thus better controlling the amount of ozone added. The top cover 613 and the adjusting cover 615 are truncated cone-shaped, so that the surfaces of the top cover 613 and the adjusting cover 615 are inclined, and the air outlet holes 614 are located on the surfaces of the top cover 613 and the adjusting cover 615, so that the air outlet holes 614 are inclined relative to the air outlet pipe 61, so that the ozone spraying range can be larger, which is convenient for ozone to be better integrated into the wastewater.

[0042] The top end of the adjusting cover 615 is fixedly connected to a limiting plate 616, which protrudes from the end of the top cover 613, and the limiting plate 616 and the end of the top cover 613 fit together. Because the top cover 613 and the adjusting cover 615 have inclined surfaces, the limiting plate 616 can prevent the adjusting cover 615 from axial movement due to multiple rotations, so that the adjusting cover 615 can better fit on the inner wall of the top cover 613.

[0043] Reference Figure 5 and Figure 6The lower end of the adjustment cover 615 is fixedly connected with a disc 617, and the transmission shaft 633 passes through the disc 617 and is fixedly connected with the limit plate 616. At the same time, the transmission shaft 633 is also fixedly connected with the disc 617, so that the transmission shaft 633 can better drive the adjustment cover 615 to rotate. The disc 617 is provided with a plurality of evenly distributed holes 618 to facilitate the passage of ozone.

[0044] Reference Figure 6 and Figure 7 A sealing ring 619 is fixedly connected to the circumference of the disc 617, and the sealing ring 619 is recessed in the inner wall of the bed body 1, so that the disc 617 and the bed body 1 are rotated and sealed, so that ozone will not enter between the adjustment cover 615 and the top cover 613, avoiding ozone overflow, and making the adjustment cover 615 rotate more stably.

[0045] The implementation principle of the ozone-powdered activated carbon coupled biological fluidized bed for treating sewage in the embodiment of the present application is as follows: when the water flow entering the fluidized bed is small, the outlet pipe 61 in the ozone addition zone 2 remains in a vertical upward state, and the outlet end 611 of the outlet pipe 61 is arranged close to the activated carbon fluidized layer 4, and the outlet holes 614 on the top cover 613 and the adjustment cover 615 are staggered, which can control the ozone output volume, so that the ozone concentration in the wastewater will not exceed the standard, thereby avoiding ozone overflow in subsequent processes, ensuring that the ozone concentration in the working environment of the staff will not be too high, and ensuring the health of the staff.

[0046] When the water flow in the fluidized bed becomes larger, the impact force of the water flow on the water baffle 612 becomes larger. After the water baffle 612 is subjected to the force, it will drive the air outlet pipe 61 to flip, so that the air outlet pipe 61 changes from a vertical state to an inclined state. The air outlet end 611 of the air outlet pipe 61 faces downward, and during the rotation of the air outlet pipe 61, the adjusting device 63 will move accordingly, driving the adjusting cover 615 to rotate, thereby increasing the overlapping area of ​​the adjusting cover 615 and the air outlet hole 614 on the top cover 613, thereby increasing the fusion time of ozone and wastewater and increasing the ozone output, thereby ensuring that when the water flow increases, the ozone concentration in the wastewater can also meet the standard, thereby ensuring a normal biological fluidization reaction.

[0047] Because the water baffle is located on one side of the outlet pipe, it also acts as a counterweight. When the water flow decreases, the outlet pipe will flip to the initial direction, so as to automatically control the position and amount of ozone sprayed from the outlet pipe in the wastewater. The use of mechanical control can be more stable and increase the service life of the device.

[0048] 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. An ozone-powdered activated carbon coupled biological fluidized bed for treating sewage, comprising a bed body (1) and an ozone addition zone (2), a supporting layer (3), and an activated carbon fluidized layer (4) arranged inside the bed body (1) from bottom to top, characterized in that: It also includes an air supply pipe (5) arranged in the ozone adding area (2) and a plurality of adding devices (6) arranged on the air supply pipe (5); The air supply pipe (5) is annular, and a plurality of adding devices (6) are located inside the air supply pipe (5) and are evenly distributed around the center of the air supply pipe (5); The adding device (6) comprises an air outlet pipe (61) and a support frame (62), wherein the support frame (62) enables the air outlet pipe (61) to be installed on the air supply pipe (5), and the air outlet pipe (61) and the air supply pipe (5) are connected via a hose (7); The middle portion of the length of the adding device (6) is rotatably connected to the support frame (62), so that the adding device (6) can be turned over along the connection; One end of the adding device (6) is an air outlet end (611), and a water baffle (612) is fixedly connected to the side wall of the other end. The water baffle (612) controls the air outlet pipe (61) to flip by its own gravity and the impact force of the water flow. A top cover (613) is fixedly mounted on the air outlet end (611), an adjusting cover (615) is fitted on the inner side wall of the top cover (613), air outlet holes (614) are provided on the adjusting cover (615) and the top cover, and the adjusting cover (615) can be turned and rotated along with the air outlet pipe (61) to control the misalignment or overlap of the air outlet holes (614) on the adjusting cover (615) and the top cover (613).

2. The ozone-powdered activated carbon coupled biological fluidized bed for treating sewage according to claim 1, characterized in that: The top cover (613) and the adjusting cover (615) are both arranged in a truncated cone shape, and the air outlet (614) is located on the surface of the top cover (613) and the adjusting cover (615), so that the air outlet (614) is arranged obliquely compared to the air outlet pipe (61).

3. The ozone-powdered activated carbon coupled biological fluidized bed for treating sewage according to claim 1, characterized in that: The top end of the regulating cover (615) is fixedly connected with a baffle, which protrudes from the top end of the top cover (613) and fits with the end surface of the top cover (613).

4. The ozone-powdered activated carbon coupled biological fluidized bed for treating sewage according to claim 1, characterized in that: The support frame (62) is composed of two support plates (621), the two support plates (621) are arranged transversely and in parallel, and one end of the support plate (621) is fixedly connected to the air supply pipe (5); A transverse axis (622) is provided between the ends of the two support plates (621) away from the air supply pipe (5), and the two ends of the transverse axis (622) are respectively fixedly connected to the two support plates (621); The middle portion of the length of the air outlet pipe (61) is rotatably connected to the transverse axis (622), the interior of the transverse axis (622) is hollow, and a plurality of rectangular holes (623) are formed on the portion of the transverse axis (622) located inside the air outlet pipe (61); One end of the hose (7) is connected to the air supply pipe (5), and the other end of the hose (7) is fixedly connected to the end of the transverse axis (622).

5. The ozone-powdered activated carbon coupled biological fluidized bed for treating sewage according to claim 4, characterized in that: An adjusting device (63) is arranged inside the air outlet pipe (61), and the adjusting device (63) comprises a rotating shaft (631) arranged parallel to the horizontal axis (622) and a transmission shaft (633) arranged perpendicular to the horizontal axis (622), and the rotating shaft (631) is located between the horizontal axis (622) and the air outlet end (611); A gear (632) is coaxially fixedly connected to the rotating shaft (631), and a circle of tooth grooves (624) is evenly arranged on the peripheral surface of the horizontal shaft (622) around the axis of the horizontal shaft (622), and the gear (632) and the tooth groove (624) are meshed; The transmission shaft (633) and the rotating shaft (631) are linked via a bevel gear (632) group, and one end of the transmission shaft (633) away from the horizontal shaft (622) is fixedly connected to the adjustment cover (615).

6. The ozone-powdered activated carbon coupled biological fluidized bed for treating sewage according to claim 5, characterized in that: The number of the gears (632) is two, and the two gears (632) are respectively arranged on both sides of the bevel gear (632).

7. The ozone-powdered activated carbon coupled biological fluidized bed for treating sewage according to claim 1, characterized in that: The activated carbon fluidized layer (4) has two layers, and the diameters of the activated carbon particles in the two layers of activated carbon fluidized layers (4) are different. The layer of activated carbon fluidized layer (4) with a relatively large particle diameter is located below the layer of activated carbon fluidized layer (4) with a relatively small particle diameter.

8. The ozone-powdered activated carbon coupled biological fluidized bed for treating sewage according to claim 7, characterized in that: An isolation layer is provided between the two activated carbon fluidized layers (4), and the isolation layer is filled with pebbles (32).

Images