Device for efficiently treating COD (Chemical Oxygen Demand) of sewage and wastewater by photocatalysis

Abstract

The invention discloses a device for efficiently treating COD (Chemical Oxygen Demand) in sewage and wastewater through photocatalysis, and relates to the technical field of wastewater treatment. According to the efficient photocatalytic sewage and wastewater COD treatment device, the liquid mixing frame is installed in the machine body, when wastewater enters the machine body, the wastewater can be conveyed through the liquid mixing frame, in the conveying process, the wastewater can be mixed with chemical reagents, impurities in the wastewater can be precipitated, meanwhile, the wastewater can react with ozone gas, and therefore the wastewater can be effectively treated. According to the feeding method, the waste water is fed into the machine body until the waste water is separated from the liquid mixing frame and enters the machine body, impurities are precipitated, automatic cleaning of precipitates is completed through cooperation of a bottom collecting frame and a right-angle type pipeline, and compared with a traditional mode that the waste water is concentrated in the tank body to be stirred and mixed, the feeding method can be used for more conveniently precipitating the precipitates; meanwhile, the mixing uniformity of the reagent and the wastewater can also be ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of wastewater treatment, in particular to a device for efficiently treating COD in sewage and wastewater using photocatalysis. Background Art

[0002] With the progress of industrial production, the amount of wastewater and sewage has increased, and the water pollution problems caused by this cannot be ignored, especially the discharge of COD (chemical oxygen demand) wastewater. If the untreated COD sewage is discharged directly, it will have a serious impact on the surrounding water quality, easily causing the surrounding water quality to become black and toxic, etc., and the higher the concentration of COD in the sewage, the greater the harm it causes. Referring to the Chinese patent, the announcement number is: "CN221217581U" "COD degradation device for sewage and wastewater", the patent points out that the current sewage pool does not have the advantages of uniform gas transmission and broken bubbles, and cannot achieve sufficient contact between ozone and sewage, which reduces the working efficiency and the treatment effect of sewage and wastewater, and the practicality needs to be further improved; however, the equipment still has the problem of being unable to clean up the sludge and sediment in the wastewater, resulting in the treatment effect and treatment efficiency of the wastewater being affected. For this reason, we propose a high-efficiency photocatalytic COD treatment device for sewage and wastewater to solve the above problems. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the present invention provides a high-efficiency photocatalytic COD treatment device for sewage and wastewater, which solves the problems raised in the above background technology.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: a high-efficiency photocatalytic COD treatment device for sewage and wastewater, comprising a body, the outer side of which is connected to a primary filter frame, the primary filter frame being used to preliminarily filter out floating matter in the wastewater;

[0005] A delivery pipe is connected between the body and the primary filter frame for delivering the wastewater after primary filtration. A liquid mixing frame is fixedly installed inside the body, and the end of the delivery pipe extends into the interior of the liquid mixing frame. A fixed plate is fixedly installed on the inner wall of the body. A plurality of rotating shafts are rotatably connected between the fixed plate and the interior of the liquid mixing frame. An arc-shaped liquid-displacing piece is rotatably sleeved on the outer side of the rotating shaft. The installation position of the arc-shaped liquid-displacing piece is located at the end of the delivery pipe for displacing the delivered wastewater.

[0006] A dosing rack is fixedly installed on the top of the mixing rack. A plurality of dosing holes are opened at the bottom of the dosing rack. The dosing rack is used to add chemical reagents and ozone gas to the mixing rack so that the waste liquid transported inside the mixing rack is mixed with the chemical reagents during the transportation process. A plurality of ultraviolet lamps are fixedly installed on the top of the mixing rack.

[0007] The outer side of the body is connected with a drain pipe, and the drain pipe is used to discharge the oxidized water that meets the standards.

[0008] Preferably, a bottom collecting rack is fixedly installed inside the body, and the top surface of the bottom collecting rack is conical, which is used to collect sediment in the wastewater. A right-angle pipe is fixedly installed at the inner center position of the bottom collecting rack, and an elastic sealing end is fixedly installed at the end of the right-angle pipe. A negative pressure pump is fixedly installed at the bottom of the body, and the negative pressure pump and the right-angle pipe are connected to each other.

[0009] Preferably, the liquid outlet end of the negative pressure pump is connected to a sewage pipe for discharging sediment in the wastewater.

[0010] Preferably, a driving shaft is rotatably connected to the interior of the machine body, and an arc-shaped scraper plate is fixedly installed on the end of the driving shaft. The arc-shaped scraper plate fits with the top surface of the bottom collecting frame and is used to push the sediment.

[0011] Preferably, a top plate is fixedly installed on the top of the body, the end of the drive shaft passes through the top plate, a drive motor is fixedly installed in the middle of the top surface of the top plate, and the output end of the drive motor is connected to the end of the drive shaft through a coupling.

[0012] Preferably, the installation position of the liquid drain pipe is located in the middle of the machine body, and the installation position of the liquid drain pipe is located directly below the liquid mixing rack.

[0013] Preferably, a liquid inlet pipe is fixedly installed on the outer side of the primary filter frame, and an inner filter frame is fixedly installed on the inside of the primary filter frame. The liquid inlet pipe is used to transport wastewater to the inside of the inner filter frame. An adjustable baffle is slidably installed on the end of the inner filter frame for adjusting according to the liquid level. A blowing assembly is provided on the side of the end of the primary filter frame away from the adjustable baffle for blowing floating objects flowing with the wastewater, so that the floating objects pass over the adjustable baffle and enter the interior of the primary filter frame.

[0014] Preferably, a conveyor belt is rotatably connected to the interior of the primary filter frame, and the conveyor belt is used to transport floating objects.

[0015] Preferably, the blowing assembly includes a blowing frame, a fixing plate is fixedly installed on the bottom of the blowing frame, the fixing plate is fixedly installed on the top of the primary filter frame, a positioning frame is fixedly installed inside the blowing frame, a servo motor is fixedly installed on the side of the positioning frame, and an arc-shaped blade is fixedly sleeved on the output end of the servo motor.

[0016] Preferably, the primary filter frame is installed at an angle and a filter screen is fixedly installed at the end.

[0017] The present invention provides a highly efficient photocatalytic COD treatment device for sewage and wastewater. Compared with the prior art, it has the following advantages:

[0018] (1) The high-efficiency photocatalytic COD treatment device for sewage and wastewater is equipped with a mixing rack inside the body. When the wastewater enters the body, the mixing rack can complete the transportation of the wastewater. During the transportation process, the wastewater can be mixed with chemical reagents to precipitate the impurities inside the wastewater. At the same time, it can react with ozone until the wastewater separates from the mixing rack and enters the body, so that the impurities are precipitated. The bottom collection rack and the right-angle pipe cooperate to complete the automatic cleaning of the sediment. Compared with the traditional method of concentrating the wastewater inside the tank for stirring and mixing, this feeding method can make it easier for the sediment to settle, and can also ensure the mixing uniformity of the reagent and the wastewater.

[0019] (2) The high-efficiency photocatalytic COD treatment device for sewage wastewater, through the setting of the primary filter frame, can adjust the height of the adjustable baffle when the wastewater enters the inner filter frame through the liquid inlet pipe so that its top is kept flush with the liquid surface of the wastewater, and then the servo motor is operated to blow the liquid surface, so that floating objects can pass over the adjustable baffle, and then the running conveyor belt completes the discharge of the floating objects, further improving the wastewater treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the cross-sectional structure of the machine body of the present invention;

[0022] Figure 3 For the present invention Figure 2 A in the middle is an enlarged structural diagram;

[0023] Figure 4 For the present invention Figure 2 Side view structural diagram;

[0024] Figure 5 This is a schematic structural diagram of the liquid mixing rack of the present invention;

[0025] Figure 6 This is a schematic structural diagram of the primary filter frame of the present invention;

[0026] Figure 7 For the present invention Figure 6 The enlarged structural diagram at B in the middle;

[0027] Figure 8 This is a schematic diagram of the cross-sectional structure of the primary filter frame of the present invention.

[0028] In the figure: 1. body; 101. top plate; 2. primary filter frame; 201. liquid inlet pipe; 202. conveyor belt; 3. conveying pipe; 4. discharge pipe; 5. inner filter frame; 501. adjustable baffle; 6. blowing frame; 601. fixing plate; 602. positioning frame; 603. servo motor; 604. curved blade; 605. filter screen; 7. bottom collection frame; 8. right-angle pipe; 801. elastic sealing end; 9. negative pressure pump; 901. sewage pipe; 10. driving shaft; 1001. curved scraper plate; 11. driving motor; 12. liquid mixing frame; 13. fixing plate; 1301. rotating shaft; 1302. curved liquid removal plate; 14. dosing frame; 1401. dosing hole; 15. ultraviolet lamp. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] See also Figures 1-8 The present invention provides two technical solutions, specifically including the following embodiments:

[0031] Example 1:

[0032] In an embodiment of the present invention, a high-efficiency photocatalytic COD treatment device for sewage and wastewater includes a body 1, a delivery pipe 3 connected to the outside of the body 1, the delivery pipe 3 being used to transport wastewater, a liquid mixing rack 12 fixedly mounted inside the body 1, the end of the delivery pipe 3 extending into the interior of the liquid mixing rack 12, a fixed plate 13 fixedly mounted on the inner wall of the body 1, a plurality of rotating shafts 1301 rotatably connected between the fixed plate 13 and the interior of the liquid mixing rack 12, an arc-shaped liquid-displacing piece 1302 rotatably sleeved on the outer side of the rotating shaft 1301, the arc-shaped liquid-displacing piece 1302 being installed at the end of the delivery pipe 3 and being used to displace the transported wastewater;

[0033] When treating wastewater, the wastewater is transported to the interior of the body 1 through the delivery pipe 3 for purification treatment. A dosing rack 14 is fixedly installed on the top of the mixing rack 12. A plurality of dosing holes 1401 are opened at the bottom of the dosing rack 14. The dosing rack 14 is used to add chemical reagents and ozone gas to the mixing rack 12, so that the wastewater transported inside the mixing rack 12 is mixed with the chemical reagents during the transportation process. A plurality of ultraviolet lamps 15 are fixedly installed on the top of the mixing rack 12;

[0034] A negative pressure device is provided on the outside of the body 1 for adding chemical reagents and ozone gas into the dosing rack 14. The chemical reagents are used to precipitate impurities in the wastewater, and the ozone gas can be used to decompose organic matter in the wastewater by contact with the wastewater, converting it into harmless water, carbon dioxide and other substances;

[0035] The negative pressure device is an existing device and is not shown in the figure;

[0036] The outer side of the body 1 is connected to a drain pipe 4, which is used to discharge the oxidized water that meets the standards;

[0037] A bottom collecting rack 7 is fixedly installed inside the body 1. The top surface of the bottom collecting rack 7 is conical and is used to collect sediment in the wastewater. A right-angle pipe 8 is fixedly installed at the center position of the bottom collecting rack 7. An elastic sealing end 801 is fixedly installed at the end of the right-angle pipe 8. A negative pressure pump 9 is fixedly installed at the bottom of the body 1. The negative pressure pump 9 and the right-angle pipe 8 are connected to each other.

[0038] When wastewater enters the body 1 through the delivery pipe 3, it first enters the mixing rack 12. The delivery of wastewater drives the arc-shaped liquid-displacing plate 1302 to rotate, thereby displacing the wastewater. At this time, chemicals and ozone can be discharged through the dosing rack 14. The chemicals are evenly mixed with the wastewater to precipitate impurities in the wastewater. At the same time, the ozone reacts with the wastewater to decompose organic matter in the wastewater, until the wastewater separates from the mixing rack 12 and enters the body 1.

[0039] When wastewater enters the body 1, impurities can settle downward in the treated wastewater and fall onto the bottom collection rack 7, and the treated water can be discharged through the drain pipe 4;

[0040] When the precipitated impurities fall onto the bottom collecting rack 7, the operation of the negative pressure pump 9 can cause the elastic sealing end 801 at the end of the right-angle pipe 8 to be deformed under force, so that the precipitates above the bottom collecting rack 7 can be discharged through the right-angle pipe 8, realizing the automatic discharge of impurities;

[0041] The liquid outlet of the negative pressure pump 9 is connected to a sewage pipe 901 for discharging sediment in the wastewater;

[0042] The body 1 is internally rotatably connected to a drive shaft 10, and an arc-shaped scraper plate 1001 is fixedly mounted on the end of the drive shaft 10. The arc-shaped scraper plate 1001 is in contact with the top surface of the bottom collecting frame 7 to push the sediment.

[0043] During the wastewater treatment process, the operation of the driving shaft 10 can drive the arc-shaped scraper plate 1001 at the end to run along the top of the bottom collection rack 7, pushing the impurities deposited above the bottom collection rack 7 so that the impurities can be moved to the top center position of the bottom collection rack 7, effectively improving the discharge effect of the impurities;

[0044] A top plate 101 is fixedly mounted on the top of the body 1. The end of the drive shaft 10 passes through the top plate 101. A drive motor 11 is fixedly mounted in the middle of the top surface of the top plate 101. The output end of the drive motor 11 is connected to the end of the drive shaft 10 via a coupling. The drive motor 11 is used to drive the drive shaft 10 to operate.

[0045] The installation position of the drain pipe 4 is located in the middle of the body 1, and the installation position of the drain pipe 4 is located directly below the liquid mixing rack 12;

[0046] During operation, reagents are added into the wastewater during its transportation, so that the reagents and wastewater are initially mixed during the process of transporting the wastewater into the body 1, and the secondary mixing is completed when the wastewater is introduced into the body 1. Compared with the traditional method of concentrating the wastewater inside the tank for stirring and mixing, this method of adding materials can make it easier to precipitate the sediment, and at the same time, it can also ensure the mixing uniformity of the reagents and wastewater.

[0047] Example 2: Based on Example 1, a high-efficiency photocatalytic COD treatment device for sewage and wastewater includes a body 1, and a primary filter frame 2 is connected to the outside of the body 1. The primary filter frame 2 is used to initially filter out floating matter in the wastewater;

[0048] A delivery pipe 3 is connected between the body 1 and the primary filter frame 2 for transporting the wastewater after primary filtration. A liquid mixing frame 12 is fixedly installed inside the body 1. The end of the delivery pipe 3 extends into the interior of the liquid mixing frame 12. A fixed plate 13 is fixedly installed on the inner wall of the body 1. A plurality of rotating shafts 1301 are rotatably connected between the fixed plate 13 and the interior of the liquid mixing frame 12. An arc-shaped liquid-displacing piece 1302 is rotatably sleeved on the outer side of the rotating shaft 1301. The arc-shaped liquid-displacing piece 1302 is installed at the end of the delivery pipe 3 for displacing the transported wastewater.

[0049] When treating wastewater, firstly, the floating matter in the wastewater is removed by cooperating with the primary filter frame 2, and then the wastewater is transported to the interior of the body 1 through the delivery pipe 3 for purification treatment;

[0050] A dosing rack 14 is fixedly mounted on the top of the mixing rack 12. A plurality of dosing holes 1401 are provided at the bottom of the dosing rack 14. The dosing rack 14 is used to add chemical reagents and ozone gas to the mixing rack 12 to precipitate and degrade the waste liquid transported inside the mixing rack 12. A plurality of ultraviolet lamps 15 are fixedly mounted on the top of the mixing rack 12.

[0051] A negative pressure device is provided on the outside of the body 1 for adding chemical reagents and ozone gas into the dosing rack 14. The chemical reagents are used to precipitate impurities in the wastewater, and the ozone gas can be used to decompose organic matter in the wastewater by contact with the wastewater, converting it into harmless water, carbon dioxide and other substances;

[0052] The negative pressure device is an existing device and is not shown in the figure;

[0053] The outer side of the body 1 is connected to a drain pipe 4, which is used to discharge the oxidized water that meets the standards;

[0054] A bottom collecting rack 7 is fixedly installed inside the body 1. The top surface of the bottom collecting rack 7 is conical and is used to collect sediment in the wastewater. A right-angle pipe 8 is fixedly installed at the center position of the bottom collecting rack 7. An elastic sealing end 801 is fixedly installed at the end of the right-angle pipe 8. A negative pressure pump 9 is fixedly installed at the bottom of the body 1. The negative pressure pump 9 and the right-angle pipe 8 are connected to each other.

[0055] When the wastewater after the primary filtration enters the body 1 through the delivery pipe 3, it can first enter the mixing rack 12. The delivery of the wastewater can drive the arc-shaped liquid-displacing piece 1302 to rotate, thereby displacing the wastewater. At this time, the chemical agent and ozone gas can be output through the dosing rack 14. The chemical agent and the wastewater are evenly mixed to precipitate impurities in the wastewater. At the same time, the ozone gas reacts with the wastewater to decompose organic matter in the wastewater, until the wastewater separates from the mixing rack 12 and enters the body 1.

[0056] When wastewater enters the body 1, impurities can settle downward in the treated wastewater and fall onto the bottom collection rack 7, and the treated water can be discharged through the drain pipe 4;

[0057] When the precipitated impurities fall onto the bottom collecting rack 7, the operation of the negative pressure pump 9 can cause the elastic sealing end 801 at the end of the right-angle pipe 8 to be deformed under force, so that the precipitates above the bottom collecting rack 7 can be discharged through the right-angle pipe 8, realizing the automatic discharge of impurities;

[0058] The liquid outlet of the negative pressure pump 9 is connected to a sewage pipe 901 for discharging sediment in the wastewater;

[0059] The body 1 is internally rotatably connected to a drive shaft 10, and an arc-shaped scraper plate 1001 is fixedly mounted on the end of the drive shaft 10. The arc-shaped scraper plate 1001 is in contact with the top surface of the bottom collecting frame 7 to push the sediment.

[0060] During the wastewater treatment process, the operation of the driving shaft 10 can drive the arc-shaped scraper plate 1001 at the end to run along the top of the bottom collection rack 7, pushing the impurities deposited above the bottom collection rack 7 so that the impurities can be moved to the top center position of the bottom collection rack 7, effectively improving the discharge effect of the impurities;

[0061] A top plate 101 is fixedly mounted on the top of the body 1. The end of the drive shaft 10 passes through the top plate 101. A drive motor 11 is fixedly mounted in the middle of the top surface of the top plate 101. The output end of the drive motor 11 is connected to the end of the drive shaft 10 via a coupling. The drive motor 11 is used to drive the drive shaft 10 to operate.

[0062] The installation position of the drain pipe 4 is located in the middle of the body 1, and the installation position of the drain pipe 4 is located directly below the liquid mixing rack 12;

[0063] Furthermore, a liquid inlet pipe 201 is fixedly installed on the outside of the primary filter frame 2, and an inner filter frame 5 is fixedly installed inside the primary filter frame 2. The liquid inlet pipe 201 is used to transport wastewater to the interior of the inner filter frame 5. An adjustable baffle 501 is slidably installed on the end of the inner filter frame 5 for adjusting according to the liquid level. A blowing assembly is provided on the side of the end of the primary filter frame 2 away from the adjustable baffle 501 for blowing floating objects flowing with the wastewater so that the floating objects pass over the adjustable baffle 501 and enter the interior of the primary filter frame 2.

[0064] The primary filter frame 2 is internally rotatably connected to a conveyor belt 202, which is used to transport floating objects;

[0065] Specifically, the height of the adjustable baffle 501 is adjustable, and a bolt is connected to the outside of the adjustable baffle 501 for locking the height of the adjustable baffle 501. During operation, the adjustable baffle 501 is adjusted so that the top of the adjustable baffle 501 is kept flush with the liquid surface. When the wastewater is being transported, the operation of the blowing assembly can allow impurities floating on the liquid surface to pass over the adjustable baffle 501 and enter the interior of the primary filter frame 2, and then be discharged by the conveyor belt 202, thereby further improving the wastewater treatment efficiency.

[0066] The blowing assembly includes a blowing frame 6, a fixing plate 601 is fixedly installed at the bottom of the blowing frame 6, and the fixing plate 601 is fixedly installed on the top of the primary filter frame 2. A positioning frame 602 is fixedly installed inside the blowing frame 6, and a servo motor 603 is fixedly installed on the side of the positioning frame 602. The output end of the servo motor 603 is fixedly sleeved with an arc-shaped blade 604;

[0067] The primary filter frame 2 is installed at an angle and a filter screen 605 is fixedly installed at the end;

[0068] The servo motor 603 is driven to drive the arc-shaped blade 604 at the end to operate, thereby blowing away the floating objects on the liquid surface, so that the floating objects can pass over the adjustable baffle 501;

[0069] Specifically, the servo motor 603 is an existing device and will not be described in detail here.

[0070] At the same time, the contents not described in detail in this specification belong to the existing technology well known to those skilled in the art.

[0071] The above is a detailed description of an embodiment of the present invention. However, the content is only a preferred embodiment of the present invention and should not be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the present invention.

Claims

1. A highly efficient photocatalytic COD treatment device for sewage and wastewater, comprising a body (1), characterized in that: The outer side of the body (1) is connected to a primary filter frame (2), and the primary filter frame (2) is used to preliminarily filter out floating matter in the wastewater; A delivery pipe (3) is connected between the machine body (1) and the primary filter frame (2) for delivering the wastewater after primary filtration; a liquid mixing frame (12) is fixedly installed inside the machine body (1); an end of the delivery pipe (3) extends into the interior of the liquid mixing frame (12); a fixed plate (13) is fixedly installed on the inner wall of the machine body (1); a plurality of rotating shafts (1301) are rotatably connected between the fixed plate (13) and the interior of the liquid mixing frame (12); an arc-shaped liquid-discharging piece (1302) is rotatably sleeved on the outer side of the rotating shaft (1301); the installation position of the arc-shaped liquid-discharging piece (1302) is located at the end of the delivery pipe (3) for displacing the delivered wastewater; A dosing rack (14) is fixedly mounted on the top of the liquid mixing rack (12), and a plurality of dosing through holes (1401) are provided at the bottom of the dosing rack (14). The dosing rack (14) is used to add chemical reagents and ozone gas to the liquid mixing rack (12), so that the waste liquid transported inside the liquid mixing rack (12) is mixed with the chemical reagents during the transport process. A plurality of ultraviolet lamps (15) are fixedly mounted on the top of the liquid mixing rack (12); The outer side of the body (1) is connected to a drain pipe (4), and the drain pipe (4) is used to discharge the oxidized water that meets the standards; A bottom collecting frame (7) is fixedly installed inside the machine body (1) for collecting sediment in the wastewater.

2. The high-efficiency photocatalytic COD treatment device for sewage and wastewater according to claim 1, characterized in that: The top surface of the bottom collecting frame (7) is conical in shape, a right-angled pipe (8) is fixedly installed at the center position of the bottom collecting frame (7), an elastic sealing end (801) is fixedly installed at the end of the right-angled pipe (8), and a negative pressure pump (9) is fixedly installed at the bottom of the machine body (1), and the negative pressure pump (9) and the right-angled pipe (8) are in communication with each other.

3. The high-efficiency photocatalytic COD treatment device for sewage and wastewater according to claim 2, characterized in that: The liquid outlet end of the negative pressure pump (9) is connected to a sewage pipe (901) for discharging sediment in the wastewater.

4. The high-efficiency photocatalytic COD treatment device for sewage and wastewater according to claim 2, characterized in that: The body (1) is internally rotatably connected to a driving shaft (10), and an arc-shaped scraper plate (1001) is fixedly mounted on the end of the driving shaft (10). The arc-shaped scraper plate (1001) is in contact with the top surface of the bottom collecting frame (7) to push the sediment.

5. The high-efficiency photocatalytic COD treatment device for sewage and wastewater according to claim 5 is characterized by: A top plate (101) is fixedly mounted on the top of the machine body (1), the end of the driving shaft (10) passes through the top plate (101), a driving motor (11) is fixedly mounted on the middle of the top surface of the top plate (101), and the output end of the driving motor (11) and the end of the driving shaft (10) are connected via a coupling.

6. The high-efficiency photocatalytic COD treatment device for sewage and wastewater according to claim 1, characterized in that: The installation position of the liquid discharge pipe (4) is located in the middle of the machine body (1), and the installation position of the liquid discharge pipe (4) is located directly below the liquid mixing rack (12).

7. The high-efficiency photocatalytic COD treatment device for sewage and wastewater according to claim 1, characterized in that: A liquid inlet pipe (201) is fixedly mounted on the outside of the primary filter frame (2), and an inner filter frame (5) is fixedly mounted inside the primary filter frame (2). The liquid inlet pipe (201) is used to transport wastewater to the inside of the inner filter frame (5). An adjustable baffle (501) is slidably mounted on the end of the inner filter frame (5) for adjusting according to the liquid level. A blowing assembly is provided on the side of the end of the primary filter frame (2) away from the adjustable baffle (501) for blowing floating objects flowing with the wastewater, so that the floating objects pass over the adjustable baffle (501) and enter the interior of the primary filter frame (2).

8. The high-efficiency photocatalytic COD treatment device for sewage and wastewater according to claim 7, characterized in that: The interior of the primary filter frame (2) is rotatably connected to a conveyor belt (202), and the conveyor belt (202) is used to transport floating objects.

9. The high-efficiency photocatalytic COD treatment device for sewage and wastewater according to claim 7, characterized in that: The blowing assembly comprises a blowing frame (6), a fixing plate (601) is fixedly mounted on the bottom of the blowing frame (6), the fixing plate (601) is fixedly mounted on the top of the primary filter frame (2), a positioning frame (602) is fixedly mounted inside the blowing frame (6), a servo motor (603) is fixedly mounted on the side of the positioning frame (602), and an arc-shaped blade (604) is fixedly sleeved on the output end of the servo motor (603).

10. The high-efficiency photocatalytic COD treatment device for sewage and wastewater according to claim 9, characterized in that: The primary filter frame (2) is installed obliquely and a filter screen (605) is fixedly installed at the end.

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