Photocatalytic oxidation device and process for water treatment

Abstract

The invention discloses a photocatalytic oxidation device for water treatment, which comprises a treatment box, the top of the treatment box is provided with a box cover, the top of the box cover is provided with a driving motor, the power output end of the driving motor is provided with a rotary connecting column, the rotary connecting column is connected with a rotary disc, and the outer side of the rotary disc is provided with a catalytic net cylinder. The catalytic net cylinder is arranged in the treatment box, the top of the outer side of the catalytic net cylinder is further slidably connected with a cleaning sleeve, the inner side of the cleaning sleeve is provided with a cleaning brush, the top of the box cover is provided with a driving mechanism, the power output end of the driving mechanism is connected with the cleaning sleeve, and the bottom of the inner side of the treatment box is provided with a fixing plate which is arranged in the catalytic net cylinder; a plurality of uniformly arranged ultraviolet lamp tubes are mounted on the fixing plate, the bottoms of the ultraviolet lamp tubes sequentially penetrate through the fixing plate and the treatment box and extend to the lower side of the treatment box, lamp holders are mounted at the bottoms of the ultraviolet lamp tubes, a supporting mechanism is mounted at the bottom of the treatment box, and a catalyst adding mechanism is further mounted on one side of the treatment box.

Description

Technical Field

[0001] The invention belongs to the technical field of water treatment, and in particular relates to a photocatalytic oxidation device and process for water treatment. Background Art

[0002] With the development of society and the emphasis on environmental protection, wastewater needs to be treated when it is discharged so that it can be discharged only after it meets the standards. The usual method of wastewater treatment is photocatalytic oxidation. Photocatalytic oxidation is a catalytic reaction under the action of external visible light. The photocatalytic oxidation reaction uses semiconductors and air as catalysts and light as energy to degrade organic matter into CO2, H2O and other non-toxic and harmless gases. In the wastewater treatment process, there is a large amount of granular and flocculent sludge in the wastewater. In the photocatalytic oxidation process, the sludge is easy to precipitate on the ultraviolet tube, which causes the light to be blocked, reducing the photocatalytic effect. It needs to be shut down regularly for cleaning, which will seriously reduce the utilization rate of the equipment. In addition, the catalytic net is often stationary during use, and the area in contact with the wastewater is low, resulting in poor treatment efficiency. Summary of the invention

[0003] In view of the problems raised by the above background technology, the purpose of the present invention is to provide a photocatalytic oxidation device and process for water treatment.

[0004] In order to achieve the above technical objectives, the technical solution adopted by the present invention is as follows:

[0005] A photocatalytic oxidation device for water treatment comprises a treatment box, a water inlet pipe is installed on one side of the top of the treatment box, a drain pipe is installed on one side of the bottom of the treatment box, a box cover is installed on the top of the treatment box, a driving motor is installed on the top of the box cover, a rotating connecting column is installed on the power output end of the driving motor, the rotating connecting column is connected to a rotating disk, the rotating disk is rotatably arranged at the bottom of the box cover, a catalytic mesh cylinder is installed on the outside of the rotating disk, the catalytic mesh cylinder is arranged in the treatment box, a cleaning sleeve is also slidably connected to the top of the outside of the catalytic mesh cylinder, and the inner side of the cleaning sleeve A cleaning brush is installed, a driving mechanism is installed on the top of the box cover, a power output end of the driving mechanism is connected to the cleaning sleeve, a fixing plate is installed on the inner bottom of the treatment box, the fixing plate is arranged in the catalytic mesh cylinder, a plurality of evenly arranged ultraviolet lamp tubes are installed on the fixing plate, the bottom of the ultraviolet lamp tubes passes through the fixing plate and the treatment box in sequence, and extends to the lower side of the treatment box, a lamp holder is installed on the bottom of the ultraviolet lamp tube, a supporting mechanism is installed on the bottom of the treatment box, the lamp holder is arranged in the supporting mechanism, and a catalyst adding mechanism is also installed on one side of the treatment box.

[0006] It is further defined that the driving mechanism includes a mounting frame installed on the top of the box cover, beam frames are installed on both sides of the top of the mounting frame, cylinders are installed on the top of the beam frames on both sides, the power output end of the cylinder is connected to a transmission rod, the bottom of the transmission rod passes through the box cover and extends to the inside thereof, a locking block is installed at the bottom of the transmission rod, and the locking block is locked on the cleaning sleeve. Such a structural design facilitates driving the cleaning sleeve to perform motion cleaning.

[0007] It is further defined that the box cover is provided with a sealing guide sleeve at the position where the transmission rod passes through, and the transmission rod is slidably arranged in the sealing guide sleeve. Such a structural design has the effect of sealing and guiding.

[0008] It is further defined that the support mechanism includes anti-skid support frames installed on both sides of the bottom of the processing box, a fixed beam is installed between the anti-skid support frames on both sides, and the lamp holder is installed on the fixed beam. Such a structural design has the effect of stable support.

[0009] It is further defined that the catalyst adding mechanism includes an ozone generator installed outside the treatment box, the ozone generator is connected to a fan, the output end of the fan is connected to an aeration plate, and the aeration plate is installed on the inner side wall of the treatment box. Such a structural design facilitates the addition of ozone into the treatment box for treatment.

[0010] It is further defined that a motor seat is also installed on the top of the box cover, the drive motor is installed on the motor seat, the outer side of the rotating connecting column is provided with a sealing sleeve, and the sealing sleeve is installed in the box cover. Such a structural design plays a role in stable installation and sealing rotation.

[0011] It is further defined that the treatment box and the fixing plate are provided with a T-shaped sealing sleeve at the penetration point of the ultraviolet lamp tube, and the lower side of the ultraviolet lamp tube is sleeved in the T-shaped sealing sleeve. Such a structural design plays a role in sealing installation to prevent leakage of wastewater in the treatment box.

[0012] It is further defined that the input end of the water inlet pipe is connected to a crushing device. Such a structural design crushes the solids in the wastewater input into the treatment box to prevent blockage and increase the reaction speed.

[0013] It is further defined that the output end of the drainage pipe is connected to a solid-liquid separation device. Such a structural design performs solid-liquid separation on the output wastewater.

[0014] A process for a photocatalytic oxidation device for water treatment, characterized in that the process comprises the following steps:

[0015] S1: discharge the wastewater from the water inlet pipe into the treatment box. When the water level in the treatment box reaches a certain height, stop the input of wastewater;

[0016] S2: Start the driving motor, the ultraviolet lamp and the catalyst adding mechanism;

[0017] S3: The catalytic net cylinder is driven to rotate by a driving motor to increase the contact area between the catalytic net cylinder and the wastewater. At the same time, the ultraviolet lamp tube also irradiates the wastewater, and the ozone generated by the catalyst adding mechanism will accelerate the catalytic oxidation process of impurities in the wastewater. The rotating catalytic net cylinder can make the ozone and wastewater contact more fully, greatly improving the efficiency of photochemical oxidation;

[0018] S4: After the catalytic oxidation is completed, it can be discharged through the drain pipe;

[0019] S5: While discharging the wastewater after catalytic oxidation, the cleaning sleeve is driven by the driving mechanism to move along the catalytic mesh cylinder, so that the cleaning sleeve drives the cleaning brush to perform a cleaning action on the surface of the catalytic mesh cylinder, so that the sludge on the catalytic mesh cylinder can fall off and be discharged along with the wastewater.

[0020] The beneficial effects of the present invention are as follows: the present invention designs a catalytic mesh cylinder that is driven to rotate by a driving motor inside the treatment box, so that the rotating catalytic mesh cylinder can make the ozone generated by the ozone generator contact and mix with the wastewater more fully, thereby improving the efficiency of wastewater treatment. At the same time, an ultraviolet lamp tube is designed in the catalytic mesh cylinder, so that the combination of the ultraviolet lamp tube and ozone can greatly improve the effect of photochemical oxidation, and the catalytic mesh cylinder can also prevent a large amount of granular and flocculent sludge from being precipitated on the ultraviolet lamp tube, preventing the light of the ultraviolet lamp tube from being blocked, and by controlling the driving mechanism, the driving mechanism drives the cleaning sleeve and the cleaning brush to achieve the cleaning effect of the sludge on the catalytic mesh cylinder without stopping the machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention can be further illustrated by means of non-limiting examples given in the accompanying drawings;

[0022] Figure 1 This is a schematic structural diagram of a photocatalytic oxidation device for water treatment according to an embodiment of the present invention;

[0023] Figure 2 This is a schematic cross-sectional structure diagram of a photocatalytic oxidation device for water treatment according to an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the enlarged structure of point A of a photocatalytic oxidation device for water treatment according to an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the enlarged structure of point B of a photocatalytic oxidation device for water treatment according to an embodiment of the present invention;

[0026] The main component symbols are described as follows:

[0027] Processing box 1, water inlet pipe 101, drain pipe 102, box cover 2, drive motor 3, rotating connecting column 4, rotating disk 5, catalytic mesh tube 6, cleaning sleeve 7, cleaning brush 8, driving mechanism 9, fixing plate 10, ultraviolet lamp tube 11, lamp holder 12, supporting mechanism 13, catalyst adding mechanism 14, mounting frame 15, beam frame 16, cylinder 17, transmission rod 18, locking block 19, sealing guide sleeve 20, anti-skid support frame 21, fixed beam 22, ozone generator 23, fan 24, aeration plate 25, motor seat 26, sealing shaft sleeve 27, T-shaped sealing sleeve 28, crushing processing device 29, solid-liquid separation device 30. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0029] Embodiment 1, as Figure 1 and Figure 2 As shown, a photocatalytic oxidation device for water treatment is provided, wherein a water inlet pipe 101 is installed on one side of the top of a treatment box 1, a drain pipe 102 is installed on one side of the bottom of the treatment box 1, a box cover 2 is installed on the top of the treatment box 1, a driving motor 3 is installed on the top of the box cover 2, a rotating connecting column 4 is installed on the power output end of the driving motor 3, the rotating connecting column 4 is connected to a rotating disk 5, the rotating disk 5 is rotatably arranged at the bottom of the box cover 2, a catalytic mesh cylinder 6 is installed on the outside of the rotating disk 5, the catalytic mesh cylinder 6 is arranged in the treatment box 1, a cleaning sleeve 7 is also slidably connected to the top of the outside of the catalytic mesh cylinder 6, and a cleaning brush 8 is installed on the inside of the cleaning sleeve 7 A driving mechanism 9 is installed on the top of the box cover 2, and the power output end of the driving mechanism 9 is connected to the cleaning sleeve 7. A fixing plate 10 is installed on the inner bottom of the treatment box 1, and the fixing plate 10 is arranged in the catalytic mesh tube 6. A plurality of evenly arranged ultraviolet lamp tubes 11 are installed on the fixing plate 10. The bottom of the ultraviolet lamp tube 11 passes through the fixing plate 10 and the treatment box 1 in sequence, and extends to the lower side of the treatment box 1. A lamp holder 12 is installed at the bottom of the ultraviolet lamp tube 11, and a supporting mechanism 13 is installed at the bottom of the treatment box 1. The lamp holder 12 is arranged in the supporting mechanism 13. A catalyst adding mechanism 14 is also installed on one side of the treatment box 1.

[0030] In this embodiment, when in use, the waste water is first discharged from the water inlet pipe 101 into the treatment box 1. When the water level in the treatment box 1 reaches a certain height, the input of the waste water is stopped, and the drive motor 3, the ultraviolet lamp tube 11 and the catalyst adding mechanism 14 are started, so that the drive motor 3 drives the rotating connecting column 4, the rotating connecting column 4 drives the rotating disk 5, and the rotating disk 5 drives the catalytic net tube 6 to rotate, thereby increasing the contact area between the catalytic net tube 6 and the waste water. At the same time, the ultraviolet lamp tube 11 also irradiates the waste water, and the ozone generated by the catalyst adding mechanism 14 will The catalytic oxidation process of impurities in the wastewater is accelerated, and the rotating catalytic mesh tube 6 can make the ozone contact with the wastewater more fully, greatly improving the efficiency of photochemical oxidation. After the catalytic oxidation is completed, it can be discharged from the drain pipe 102. At the same time, the driving mechanism 9 can be controlled to drive the cleaning sleeve 7 to move along the catalytic mesh tube 6, so that the cleaning sleeve 7 drives the cleaning brush 8 to perform a cleaning action on the surface of the catalytic mesh tube 6, so that the sludge on the catalytic mesh tube 6 can fall off and be discharged, preventing it from remaining on the catalytic mesh tube 6 and affecting the illumination of the ultraviolet lamp 11 inside it.

[0031] Embodiment 2, as Figure 1 and Figure 2 As shown, this embodiment adds the following structure on the basis of embodiment 1, the driving mechanism 9 includes a mounting frame 15 installed on the top of the box cover 2, cross beam frames 16 are installed on both sides of the top of the mounting frame 15, and cylinders 17 are installed on the tops of the cross beam frames 16 on both sides. The power output end of the cylinder 17 is connected to a transmission rod 18, the bottom of the transmission rod 18 passes through the box cover 2 and extends to the inner side thereof, and a locking block 19 is installed at the bottom of the transmission rod 18, and the locking block 19 is locked and installed on the cleaning sleeve 7.

[0032] In this embodiment, during installation, the cylinder 17 can be fixedly installed by the mounting frame 15 and the crossbeam frame 16. During use, by starting the cylinder 17, the cylinder 17 pushes the transmission rod 18, the transmission rod 18 pushes the locking block 19, the locking block 19 pushes the cleaning sleeve 7, and the cleaning sleeve 7 drives the cleaning brush 8 to move along the catalytic mesh tube 6 for cleaning.

[0033] Embodiment 3, as Figure 4 As shown, this embodiment adds the following structure on the basis of the embodiment 1: a sealing guide sleeve 20 is installed at the position where the transmission rod 18 passes through the box cover 2, and the transmission rod 18 is slidably arranged in the sealing guide sleeve 20.

[0034] In this embodiment, when the cylinder 17 pushes the transmission rod 18 to move, the transmission rod 18 slides in the sealing guide sleeve 20 and drives the locking block 19 to move, thereby ensuring the guiding movement and having a sealing effect.

[0035] Embodiment 4, as Figure 2As shown, this embodiment adds the following structure on the basis of embodiment 1, the support mechanism 13 includes anti-skid support frames 21 installed on both sides of the bottom of the processing box 1, a fixed beam 22 is installed between the anti-skid support frames 21 on both sides, and the lamp holder 12 is installed on the fixed beam 22.

[0036] In this embodiment, when in use, the anti-skid support frame 21 can provide a stable support effect for the processing box 1 , and the fixed crossbeam 22 is used to reinforce and connect the anti-skid support frames 21 on both sides, and also facilitates the fixed installation of the lamp holder 12 .

[0037] Embodiment 5, as Figure 2 As shown, this embodiment adds the following structure on the basis of embodiment 1, the catalyst adding mechanism 14 includes an ozone generator 23 installed on the outside of the treatment box 1, the ozone generator 23 is connected to a fan 24, the output end of the fan 24 is connected to an aeration plate 25, and the aeration plate 25 is installed on the inner side wall of the treatment box 1.

[0038] In this embodiment, when in use, ozone is generated by the ozone generator 23, and is sprayed out from the aeration plate 25 under the action of the fan 24, so that the ozone contacts the wastewater. The rotating catalytic mesh tube 6 can make the ozone contact with the wastewater more fully, so that the ozone accelerates the catalytic oxidation process of the wastewater and improves the treatment effect of the wastewater.

[0039] Embodiment 6, as Figure 3 As shown, this embodiment adds the following structure on the basis of embodiment 1: a motor seat 26 is also installed on the top of the box cover 2, the drive motor 3 is installed on the motor seat 26, and a sealing sleeve 27 is provided on the outer side of the rotating connecting column 4, and the sealing sleeve 27 is installed in the box cover 2.

[0040] In this embodiment, during installation, the motor seat 26 can be used to fix the drive motor 3, ensuring that it can stably drive the rotating connecting column 4 to rotate. At the same time, the rotating connecting column 4 rotates along the sealing sleeve 27 to ensure that it also has a sealing effect during rotation.

[0041] Embodiment 7, as Figure 2 As shown, this embodiment adds the following structure on the basis of embodiment 1: a T-shaped sealing sleeve 28 is installed at the penetration point of the ultraviolet lamp tube 11 on the processing box 1 and the fixing plate 10, and the lower side of the ultraviolet lamp tube 11 is sleeved in the T-shaped sealing sleeve 28.

[0042] In this embodiment, during installation, the ultraviolet lamp tube 11 is inserted into the T-shaped sealing sleeve 28, which not only achieves positioning and installation but also has a sealing effect, thereby preventing leakage of wastewater in the treatment box 1.

[0043] Embodiment 8, as Figure 2As shown, this embodiment adds the following structure on the basis of Embodiment 1: the input end of the water inlet pipe 101 is connected to a crushing processing device 29 .

[0044] In this embodiment, when wastewater is input into the treatment box 1 from the water inlet pipe 101, the wastewater will first be pulverized by the pulverizing treatment device 29 to pulverize the solids in the wastewater to prevent blockage and increase the reaction speed.

[0045] Embodiment 9, as Figure 2 As shown, this embodiment adds the following structure on the basis of Embodiment 1: the output end of the drain pipe 102 is connected to a solid-liquid separation device 30 .

[0046] In this embodiment, the wastewater after catalytic oxidation is output from the drain pipe 102 and is separated into solid and liquid by the solid-liquid separation device 30 so as to process the liquid and the solid separately.

[0047] A process for a photocatalytic oxidation device for water treatment, characterized in that the process comprises the following steps:

[0048] S1: discharge the wastewater from the water inlet pipe 101 into the treatment box 1. When the water level in the treatment box 1 reaches a certain height, stop the input of wastewater;

[0049] S2: Start the driving motor 3, the ultraviolet lamp 11 and the catalyst adding mechanism 14;

[0050] S3: The catalytic net tube 6 is driven to rotate by the driving motor 3 to increase the contact area between the catalytic net tube 6 and the wastewater. At the same time, the ultraviolet lamp 11 also irradiates the wastewater, and the ozone generated by the catalyst adding mechanism 14 accelerates the catalytic oxidation process of impurities in the wastewater. The rotating catalytic net tube 6 can make the ozone contact with the wastewater more fully, greatly improving the efficiency of photochemical oxidation;

[0051] S4: After the catalytic oxidation is completed, the product can be discharged from the drain pipe 102;

[0052] S5: While discharging the wastewater after catalytic oxidation, the driving mechanism 9 drives the cleaning sleeve 7 to move along the catalytic mesh tube 6, so that the cleaning sleeve 7 drives the cleaning brush 8 to perform a cleaning action on the surface of the catalytic mesh tube 6, so that the sludge on the catalytic mesh tube 6 can fall off and be discharged along with the wastewater.

[0053] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A photocatalytic oxidation device for water treatment, characterized in that: The invention comprises a treatment box (1), wherein a water inlet pipe (101) is installed on one side of the top of the treatment box (1), a drain pipe (102) is installed on one side of the bottom of the treatment box (1), a box cover (2) is installed on the top of the treatment box (1), a driving motor (3) is installed on the top of the box cover (2), a rotating connection column (4) is installed at the power output end of the driving motor (3), the rotating connection column (4) is connected to a rotating disk (5), the rotating disk (5) is rotatably arranged at the bottom of the box cover (2), a catalytic mesh cylinder (6) is installed on the outer side of the rotating disk (5), the catalytic mesh cylinder (6) is arranged in the treatment box (1), a cleaning sleeve (7) is also slidably connected to the outer top of the catalytic mesh cylinder (6), a cleaning brush (8) is installed on the inner side of the cleaning sleeve (7), and the A driving mechanism (9) is installed on the top of the box cover (2), and the power output end of the driving mechanism (9) is connected to the cleaning sleeve (7). A fixing plate (10) is installed on the inner bottom of the treatment box (1), and the fixing plate (10) is arranged in the catalytic net cylinder (6). A plurality of uniformly arranged ultraviolet lamp tubes (11) are installed on the fixing plate (10), and the bottom of the ultraviolet lamp tubes (11) sequentially penetrates the fixing plate (10) and the treatment box (1) and extends to the lower side of the treatment box (1). A lamp holder (12) is installed on the bottom of the ultraviolet lamp tube (11), and a supporting mechanism (13) is installed on the bottom of the treatment box (1), and the lamp holder (12) is arranged in the supporting mechanism (13). A catalyst adding mechanism (14) is also installed on one side of the treatment box (1).

2. A photocatalytic oxidation device for water treatment according to claim 1, characterized in that: The driving mechanism (9) comprises a mounting frame (15) mounted on the top of the box cover (2), cross beam frames (16) being mounted on both sides of the top of the mounting frame (15), cylinders (17) being mounted on the tops of the cross beam frames (16) on both sides, a transmission rod (18) being connected to the power output end of the cylinder (17), the bottom of the transmission rod (18) passing through the box cover (2) and extending to the inner side thereof, a locking block (19) being mounted on the bottom of the transmission rod (18), and the locking block (19) being locked and mounted on the cleaning sleeve (7).

3. A photocatalytic oxidation device for water treatment according to claim 2, characterized in that: The box cover (2) is provided with a sealing guide sleeve (20) at the position where the transmission rod (18) passes through, and the transmission rod (18) is slidably arranged in the sealing guide sleeve (20).

4. A photocatalytic oxidation device for water treatment according to claim 3, characterized in that: The support mechanism (13) comprises anti-skid support frames (21) installed on both sides of the bottom of the processing box (1), a fixed beam (22) is installed between the anti-skid support frames (21) on both sides, and the lamp holder (12) is installed on the fixed beam (22).

5. A photocatalytic oxidation device for water treatment according to claim 4, characterized in that: The catalyst adding mechanism (14) comprises an ozone generator (23) installed outside the treatment box (1), the ozone generator (23) is connected to a fan (24), the output end of the fan (24) is connected to an aeration plate (25), and the aeration plate (25) is installed on the inner side wall of the treatment box (1).

6. A photocatalytic oxidation device for water treatment according to claim 5, characterized in that: A motor seat (26) is also installed on the top of the box cover (2), and the drive motor (3) is installed on the motor seat (26). The outer side of the rotating connecting column (4) is provided with a sealing sleeve (27), and the sealing sleeve (27) is installed in the box cover (2).

7. A photocatalytic oxidation device for water treatment according to claim 6, characterized in that: The processing box (1) and the fixing plate (10) are provided with a T-shaped sealing sleeve (28) at the penetration point of the ultraviolet lamp tube (11), and the lower side of the ultraviolet lamp tube (11) is sleeved in the T-shaped sealing sleeve (28).

8. A photocatalytic oxidation device for water treatment according to claim 7, characterized in that: The input end of the water inlet pipe (101) is connected to a crushing device (29).

9. A photocatalytic oxidation device for water treatment according to claim 8, characterized in that: The output end of the drainage pipe (102) is connected to a solid-liquid separation device (30).

10. A process based on the photocatalytic oxidation device for water treatment according to any one of claims 1 to 9, characterized in that: The process comprises the following steps: S1: discharge wastewater from the water inlet pipe (101) into the treatment box 1. When the water level in the treatment box (1) reaches a certain height, stop inputting wastewater; S2: starting the driving motor (3), the ultraviolet lamp (11) and the catalyst adding mechanism (14); S3: The catalytic net cylinder (6) is driven to rotate by the driving motor (3), thereby increasing the contact area between the catalytic net cylinder (6) and the wastewater. At the same time, the ultraviolet lamp tube (11) also irradiates the wastewater, and the ozone generated by the catalyst adding mechanism (14) accelerates the catalytic oxidation process of impurities in the wastewater. The rotating catalytic net cylinder (6) can make the ozone contact with the wastewater more fully, thereby greatly improving the efficiency of photochemical oxidation. S4: After the catalytic oxidation is completed, the product can be discharged from the drain pipe (102); S5: While discharging the wastewater after catalytic oxidation, the driving mechanism (9) drives the cleaning sleeve (7) to move along the catalytic mesh cylinder (6), so that the cleaning sleeve (7) drives the cleaning brush (8) to perform a cleaning action on the surface of the catalytic mesh cylinder (6), so that the sludge on the catalytic mesh cylinder (6) can fall off and be discharged along with the wastewater.

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