Sewage disinfection device with high-efficiency mixing function

Abstract

The utility model discloses a sewage disinfection device with high -efficient mixing function, including jar body, the pre -mixing chamber and reaction chamber are separated to the upper and lower of the baffle in jar body, mixing unit, including impeller and static mixer, impeller rotation is arranged in the pre -mixing chamber, the water inlet of static mixer is linked together with pre -mixing chamber, and its water outlet is linked together with reaction chamber through mixing inlet pipe, disinfection unit, including disinfectant adding mechanism and ultraviolet lamp tube. The utility model has adopted the process route of disinfecting after filtering, and has designed the high -efficient mixing unit including dynamic impeller and static mixer, and the unique design of cooperation disinfectant adding mechanism in the spray head pointing the impeller axle center, so that the disinfectant can be with the filtered clean water in the pre -mixing chamber instantaneously be high -speed shearing and primary diffusion, then again through static mixer carries out the depth turbulent mixing, and this flow and structure combination effectively overcame the problem that the traditional device only relied on single stirring led to the uneven mixing, the reaction is not sufficient.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a wastewater disinfection device with a high-efficiency mixing function. Background Technology

[0002] In the current field of wastewater disinfection treatment, traditional devices mostly use a single disinfection method such as chlorine disinfection or ultraviolet disinfection. The mixing process usually relies on simple stirring, which results in uneven mixing and insufficient contact between the disinfectant and the wastewater. In addition, existing equipment often disperses the pretreatment, reaction and filtration functions, resulting in a large system footprint and high energy consumption, making it difficult to meet the engineering requirements of high efficiency and continuous operation.

[0003] The "sewage disinfection device" disclosed in CN222795276U has a typical technical solution that integrates a filtration chamber and a disinfection chamber in the disinfection tank, performs multi-stage physical filtration through filter screens, filter plates, etc., and uses a stirring rod to mix the disinfectant and sewage; although this solution can complete basic solid-liquid separation and disinfection operations.

[0004] However, the mixing efficiency relies entirely on the rotation of the stirring rod in the disinfection chamber, which has inherent defects such as insufficient mixing intensity and uneven flow field distribution. This results in insufficient contact between the disinfectant and the sewage, low reaction efficiency, and the single chemical disinfection method has limited effect on the inactivation of highly resistant microorganisms, making it difficult to guarantee the stability of the effluent quality. Utility Model Content

[0005] To address the aforementioned issues, a wastewater disinfection device with a highly efficient mixing function is provided. The disinfectant is instantly sheared and initially diffused with the filtered purified water in the premixing chamber, and then undergoes deep turbulent mixing in a static mixer. This process and structural combination effectively overcomes the problems of uneven mixing and insufficient reaction caused by traditional devices that rely solely on stirring, greatly improving the utilization rate of the disinfectant and the mixing effect, and laying a solid foundation for thorough disinfection.

[0006] To address the problems of existing technologies, this application provides a wastewater disinfection device with a high-efficiency mixing function, including a tank body, which is divided into a premixing chamber and a reaction chamber by a partition; a mixing unit, including an impeller and a static mixer; the impeller is rotatably disposed in the premixing chamber; the inlet end of the static mixer is connected to the premixing chamber, and its outlet end is connected to the reaction chamber through a mixing inlet pipe; a disinfection unit, including a disinfectant dosing mechanism and an ultraviolet lamp; the disinfectant dosing mechanism includes multiple nozzles with outlets tilted downwards and pointing towards the axis of the impeller; and an ultraviolet lamp. The tube is inserted into the reaction chamber; the filtration backwashing unit includes an outer cylinder, a filter basket, and a three-way valve; the filter basket is located inside the outer cylinder, and a filter annular gap is formed between the side wall and the inner wall of the outer cylinder, and a sealing structure is provided at its top; the outer cylinder is provided with an inlet pipe, a drain pipe, and a backwashing pipe located above the filter basket; the side wall and bottom of the filter basket are densely covered with filter holes, and its side wall is connected to the clean water outlet on the outer cylinder through an outlet pipe, and the end of the clean water outlet is connected to the inlet of the premixing chamber; the three-way valve is used to switch the water flow path to enter the normal filtration or backwashing mode.

[0007] As one technical solution of this application, the filtration backwashing unit also includes a filter box disposed inside the filter basket. The filter box is located above the water outlet pipe. The bottom of the filter box is densely covered with multiple second filter holes. A limiting ring is connected to the inner wall of the filter basket, and the bottom of the filter box is supported on the limiting ring.

[0008] As one technical solution of this application, the sealing structure at the top of the filter basket includes a retaining ring that is circumferentially connected to the outer wall of its top and a fixing ring that is fixed to the inner wall of the outer cylinder; both the retaining ring and the fixing ring are elliptical shapes that are inclined downward on one side to match the top opening of the filter basket, and the bottom of the retaining ring is in contact with the top of the fixing ring. The filter basket is also provided with a handle.

[0009] As one technical solution of this application, the mixing unit also includes a drive mechanism, which includes a motor, a drive shaft and a coupling. The motor is fixedly installed on the first sealing cover of the tank body through a first flange. The end of the power output shaft of the motor moves vertically downward through the first sealing cover and is connected to the drive shaft through the coupling. The drive shaft is vertically arranged and its bottom end is fixedly connected to the top end of the impeller.

[0010] As one technical solution of this application, the disinfectant dosing mechanism also includes a ring pipe and an inlet pipe. The ring pipe is fixed to the inner wall of the premixing chamber near the top by a clamp. The inlet pipe is located outside the tank and its end passes through the side wall of the tank and is connected to the ring pipe. Several nozzles are fixed at equal intervals on the ring pipe.

[0011] As one technical solution of this application, a static mixer is set outside the tank body, and a water outlet is opened at the bottom of the partition. The bottom end of the water outlet is connected to the water inlet of the static mixer through a connecting pipe that penetrates the side wall of the reaction chamber. A first valve is provided at the interface between the connecting pipe and the water inlet of the static mixer. A second valve is provided on the drain outlet at the bottom of the reaction chamber. A sewage pipe is located at the bottom of the outer cylinder and a third valve is provided on it.

[0012] As one technical solution of this application, the top of the outer cylinder is provided with an openable second sealing cover, and the outer cylinder is fixedly installed on the bracket through a second flange, and the bracket is fixedly connected to the side wall of the tank.

[0013] As one technical solution of this application, the inlet end of the three-way valve is connected to the main inlet pipe, and the two outlet ends of the three-way valve are respectively connected to the inlet pipe and the backwash pipe.

[0014] This utility model has the following beneficial effects: 1. This utility model optimizes the treatment process and improves efficiency by guiding the filtered purified water back to the premixing chamber for two-stage mixing and double disinfection with disinfectant, resulting in significant benefits. First, the device adopts a process route of filtration followed by disinfection and is designed with a high-efficiency mixing unit that includes a dynamic impeller and a static mixer. Combined with the unique design of the nozzle pointing towards the impeller axis in the disinfectant dosing mechanism, the disinfectant and filtered purified water are instantly sheared and initially diffused at high speed in the premixing chamber. Subsequently, the water undergoes deep turbulent mixing in the static mixer. This process and structural combination effectively overcomes the problems of uneven mixing and insufficient reaction caused by traditional devices that rely solely on stirring, greatly improving the utilization rate of the agent and the mixing effect, laying a solid foundation for thorough disinfection.

[0015] 2. The filter backwashing unit of this utility model has an ingenious structural design. By setting a sealing structure with an elliptical retaining ring and a fixing ring, and adding a filter box inside the filter basket, it achieves a highly efficient and reliable self-cleaning function. In backwashing mode, the water flow is switched by a three-way valve. High-pressure water enters the top of the filter basket through the backwashing pipe. The tight fit between the retaining ring and the fixing ring effectively prevents short-circuiting of the water flow, forcing all the flushing water to flow downwards through the second filter hole of the filter box. This process can effectively flush away impurities trapped on the outer wall of the filter basket and also use the filter box to intercept impurities, preventing them from entering the filter basket. This ensures the thoroughness of backwashing, significantly reduces the maintenance frequency and operation difficulty, and ensures the long-term stable operation of the system. Moreover, both the filter basket and the filter box can be removed separately for easy and thorough cleaning.

[0016] 3. This utility model integrates a dual chemical and physical disinfection mechanism, constructing multiple safety guarantees. After the filtered water is efficiently mixed with the disinfectant in the premixing chamber, it flows sequentially through the static mixer into the reaction chamber. During this process, not only is a full chemical reaction completed, but it is also irradiated by the built-in ultraviolet lamp. This progressive treatment process of "filtration-chemical disinfection-physical disinfection", especially the supplementary inactivation of resistant microorganisms remaining after chemical disinfection by ultraviolet light, forms a powerful synergistic disinfection effect, which greatly improves the biological safety of the effluent. This makes the water quality discharged through the drain outlet more stable and safer, and can meet higher standards for discharge or reuse. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the tank structure of this utility model. Figure 2 ; Figure 3 This is a cross-sectional view of the tank body in this utility model; Figure 4 This is a schematic diagram of the connection structure between the outer cylinder and the three-way valve of this utility model; Figure 5 This is a cross-sectional schematic diagram of the connection structure between the outer cylinder and the filter basket of this utility model; Figure 6 This is a schematic diagram of the filter basket structure of this utility model.

[0018] In the diagram: 1. Tank body; 101. Premixing chamber; 102. Reaction chamber; 103. Mixing water inlet pipe; 104. Water inlet; 105. Drain outlet; 106. Sealing cover; 2. Baffle plate; 201. Water outlet; 202. Connecting pipe; 3. Impeller; 301. Drive shaft; 4. Static mixer; 5. Motor; 501. First flange; 6. Ultraviolet lamp tube; 7. Disinfectant dosing mechanism: 701. Annular pipe; 702. Liquid inlet pipe; 703. Nozzle; 8. Outer cylinder; 801. Water inlet pipe 802. Backwash pipe; 803. Sewage pipe; 804. Clean water outlet; 805. Second sealing cover; 806. Second flange; 807. Fixing ring; 9. Filter basket; 901. Filter hole; 902. Water outlet pipe; 903. Limiting ring; 904. Retaining ring; 905. Handle; 10. Filter box; 1001. Second filter hole; 11. Three-way valve; 12. Main water inlet pipe; 13. First valve; 14. Second valve; 15. Third valve; 16. Coupling; 17. Clamp; 18. Bracket. Detailed Implementation

[0019] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments.

[0020] See Figures 1-6 As shown, a wastewater disinfection device with a high-efficiency mixing function includes a tank 1, which is divided into a premixing chamber 101 and a reaction chamber 102 by a partition 2. The mixing unit includes an impeller 3 and a static mixer 4; the impeller 3 is rotatably disposed in the premixing chamber 101; the inlet of the static mixer 4 is connected to the premixing chamber 101, and its outlet is connected to the reaction chamber 102 via a mixing inlet pipe 103; the disinfection unit includes a disinfectant dosing mechanism 7 and an ultraviolet lamp 6; the disinfectant dosing mechanism 7 includes multiple nozzles 703 with outlets tilted downwards towards the axis of the impeller 3; the ultraviolet lamp 6 is inserted into the reaction chamber 102; the filtration backwashing unit includes an outer cylinder 8, a filter basket 9, and a three-way valve 11. The filter basket 9 is located inside the outer cylinder 8, and a filter annular gap is formed between its side wall and the inner wall of the outer cylinder 8. A sealing structure is provided on its top. The outer cylinder 8 is provided with an inlet pipe 801, a drain pipe 803, and a backwash pipe 802 located above the filter basket 9, which are connected to the filter annular gap. The side wall and bottom of the filter basket 9 are densely covered with filter holes 901. Its side wall is connected to the clean water outlet 804 on the outer cylinder 8 through the outlet pipe 902. The end of the clean water outlet 804 is connected to the inlet 104 of the premixing chamber. The three-way valve 11 is used to switch the water flow path to enter the normal filtration or backwash mode.

[0021] When the device is working, raw water first enters the filtration backwashing unit through the three-way valve 11, and flows into the filter annular gap formed by the outer cylinder 8 and the filter basket 9 through the inlet pipe 801. The water passes through the filter holes 901 on the side wall and bottom of the filter basket 9 to complete the filtration. The impurities are blocked outside the filter basket 9. The filtered clean water flows out from the clean water outlet 804 through the outlet pipe 902, and enters the premixing chamber 101 of the tank 1 through the inlet 104. At the same time, the nozzle 703 of the disinfectant dosing mechanism 7 accurately sprays the disinfectant. At the high-speed rotating impeller 3 shaft, instantaneous initial high-efficiency mixing is achieved. The mixture is then deeply mixed through the static mixer 4, and enters the reaction chamber 102 through the mixing water inlet pipe 103. It is then irradiated by the ultraviolet lamp 6 to complete the final disinfection. The treated clean water is finally discharged from the drain outlet 105. When cleaning is required, the three-way valve 11 is operated to switch the water path, so that the rinsing water enters from the backwash pipe 802, passes through the filter basket 9 in reverse to rinse the filter holes 901, and the dirt is discharged from the drain pipe 803.

[0022] The filter backwashing unit also includes a filter box 10 disposed inside the filter basket 9. The filter box 10 is located above the water outlet pipe 902. The bottom of the filter box 10 is densely covered with multiple second filter holes 1001. The inner wall of the filter basket 9 is connected to a limiting ring 903, and the bottom of the filter box 10 is supported on the limiting ring 903.

[0023] During the backwashing stage, when high-pressure water flows from the backwash pipe 802 into the filter basket 9 from top to bottom, the filter box 10 filters through the second filter hole 1001. Its main function is to intercept impurities in the water from entering the filter basket 9, thereby effectively preventing these impurities from entering the outlet pipe 902 below with the water flow. This completely prevents water containing impurities from flowing back to the premixing chamber 101 through the clean water outlet 804, ensuring the purity of the water in the subsequent treatment process and the stability of the system operation.

[0024] The sealing structure at the top of the filter basket 9 includes a retaining ring 904 that is circumferentially connected to the outer wall of its top end and a fixing ring 807 that is fixed to the inner wall of the outer cylinder 8. Both the retaining ring 904 and the fixing ring 807 are elliptical shapes that are inclined downward on one side to match the opening at the top of the filter basket 9, and the bottom of the retaining ring 904 is in contact with the top of the fixing ring 807. The filter basket 9 is also provided with a handle 905.

[0025] The sealing structure at the top of the filter basket 9 achieves a crucial sealing function through the tight fit between its unique elliptical retaining ring 904 and the fixing ring 807. The retaining ring 904 is circumferentially attached to the outer wall of the top of the filter basket 9, while the fixing ring 807 is fixed to the inner wall of the outer cylinder 8. Both adopt an elliptical design with one side tilted downwards to match the opening at the top of the filter basket 9. After assembly, the bottom of the retaining ring 904 and the top of the fixing ring 807 fit tightly together. This structure can effectively guide the water flow during normal filtration. More importantly, during the backwashing stage, when high-pressure water is injected from the backwash pipe 802, the elliptical sealing surface can reliably prevent water from short-circuiting and leaking from the top gap between the filter basket 9 and the outer cylinder 8, forcing all the backwash water to penetrate downwards through the filter medium, thereby ensuring that the backwash water flow is used entirely to flush away the impurities trapped on the outer wall of the filter basket 9. At the same time, the handle 905 provided on the filter basket 9 provides convenient operation for disassembling and maintaining this sealing structure and removing the filter basket 9 for cleaning.

[0026] The mixing unit also includes a drive mechanism, which includes a motor 5, a drive shaft 301 and a coupling 16. The motor 5 is fixedly mounted on the first sealing cover 106 of the tank body 1 through the first flange 501. The end of the power output shaft of the motor 5 moves vertically downward through the first sealing cover 106 and is connected to the drive shaft 301 through the coupling 16. The drive shaft 301 is vertically arranged and its bottom end is fixedly connected to the top end of the impeller 3.

[0027] The specific working principle of the drive mechanism is as follows: The motor 5 is firmly installed on the first sealing cover 106 of the tank 1 through the first flange 501. Its power output shaft moves vertically downward through the first sealing cover 106 and is reliably connected to the vertically set drive shaft 301 through the coupling 16. Finally, the bottom end of the drive shaft 301 drives the impeller 3 to rotate at high speed in the premixing chamber 101. This transmission structure not only ensures the efficiency and stability of power transmission, but its unique design of penetrating the first sealing cover 106 also ensures the sealing integrity of the tank 1, thus providing a continuous and stable power source for the impeller 3 to achieve efficient fluid mixing.

[0028] The disinfectant dosing mechanism 7 also includes an annular pipe 701 and an inlet pipe 702. The annular pipe 701 is fixed to the inner wall of the premixing chamber 101 near the top by a clamp 17. The inlet pipe 702 is located outside the tank body 1 and its end passes through the side wall of the tank body 1 and is connected to the annular pipe 701. Several nozzles 703 are fixed at equal intervals on the annular pipe 701.

[0029] By connecting the annular pipe 701 and the inlet pipe 702, the interiors of the annular pipe 701 and the inlet pipe 702 are connected. Then, the disinfectant enters the annular pipe 701 through the inlet pipe 702, and the disinfectant is evenly sprayed into the premixing chamber 101 by the nozzle 703 set on the annular pipe 701.

[0030] The static mixer 4 is located outside the tank 1. The bottom of the partition 2 has an outlet 201. The bottom of the outlet 201 is connected to the water inlet of the static mixer 4 through a connecting pipe 202 that penetrates the side wall of the reaction chamber 102. A first valve 13 is provided at the interface between the connecting pipe 202 and the water inlet of the static mixer 4. A second valve 14 is provided on the drain outlet 105 at the bottom of the reaction chamber 102. The drain pipe 803 is located at the bottom of the outer cylinder 8 and a third valve 15 is provided on it.

[0031] The static mixer 4 is designed to be external to the tank 1 and its mixing function is achieved through a specific pipeline connection. The liquid flow that has been initially mixed in the premixing chamber 101 flows out through the outlet 201 at the bottom of the baffle 2 and is transported to the inlet end of the static mixer 4 through the connecting pipe 202 that penetrates the side wall of the reaction chamber 102. The first valve 13 set at the interface between the connecting pipe 202 and the inlet end of the static mixer 4 is used to control the timing and flow rate of entering the static mixer 4. The liquid flow is deeply mixed after being divided and recombined multiple times inside the static mixer 4. Then it enters the reaction chamber 102 for subsequent treatment through the mixing inlet pipe 103. The second valve 14 set on the drain outlet 105 at the bottom of the reaction chamber 102 is used to regulate the discharge of the final treated water. The third valve 15 set on the drain pipe 803 at the bottom of the outer cylinder 8 is specifically used to control the discharge of sewage during the backwashing process. The coordinated work of these three valves ensures the process control and operating efficiency of the entire system under different working conditions.

[0032] The outer cylinder 8 is provided with an openable second sealing cover 805 at the top. The outer cylinder 8 is fixedly installed on the bracket 18 through the second flange 806. The bracket 18 is fixedly connected to the side wall of the tank 1.

[0033] The outer cylinder 8 is firmly fixed to the bracket 18 by the second flange 806, and the bracket 18 is fixedly connected to the side wall of the tank 1. This support structure ensures the relative positional stability between the filtration backwashing unit and the mixing and disinfection unit and the compactness of the overall structure. At the same time, the openable second sealing cover 805 set on the top of the outer cylinder 8 provides a convenient maintenance channel for the installation, maintenance and replacement of the internal filter basket 9 and filter box 10, so that the operator can complete the cleaning or replacement of the filter element without disassembling the entire unit, which greatly improves the convenience of equipment maintenance and the efficiency of operation.

[0034] The inlet end of the three-way valve 11 is connected to the main inlet pipe 12, and the two outlet ends of the three-way valve 11 are connected to the inlet pipe 801 and the backwash pipe 802, respectively.

[0035] The three-way valve 11 is a key control component for water flow distribution. Its inlet end is connected to the main inlet pipe 12, and its two outlet ends are connected to the inlet pipe 801 and backwash pipe 802 of the filter unit, respectively. By operating the three-way valve 11, different outlet channels can be switched. When switched to be connected to the inlet pipe 801, the raw water enters the filter annulus between the outer cylinder 8 and the filter basket 9 from the main inlet pipe 12 through the three-way valve 11 to perform the normal filtration procedure. When switched to be connected to the backwash pipe 802, the flushing water flows from the main inlet pipe 12 through the three-way valve 11 to the backwash pipe 802 located above the filter basket 9, realizing the reverse flushing of the filter basket 9. This design makes the switching operation between the two working modes of filtration and backwashing simple and reliable, and the entire process can be completed without changing the external pipeline connection.

[0036] The above embodiments only illustrate one or more implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A wastewater disinfection device with a high-efficiency mixing function, characterized in that, It includes a tank (1), which is divided into a premixing chamber (101) and a reaction chamber (102) by a partition (2). The mixing unit includes an impeller (3) and a static mixer (4); the impeller (3) is rotatably disposed in the premixing chamber (101); the water inlet of the static mixer (4) is connected to the premixing chamber (101), and its water outlet is connected to the reaction chamber (102) through a mixing water inlet pipe (103); The disinfection unit includes a disinfectant dosing mechanism (7) and an ultraviolet lamp (6); the disinfectant dosing mechanism (7) includes multiple nozzles (703) with water outlets tilted downwards and pointing towards the axis of the impeller (3); the ultraviolet lamp (6) is inserted into the reaction chamber (102); The filter backwashing unit includes an outer cylinder (8), a filter basket (9), and a three-way valve (11). The filter basket (9) is located inside the outer cylinder (8) and a filter annular gap is formed between its side wall and the inner wall of the outer cylinder (8). A sealing structure is provided on its top. The outer cylinder (8) is provided with an inlet pipe (801), a drain pipe (803) connected to the filter annular gap, and a backwash pipe (802) located above the filter basket (9). The side wall and bottom of the filter basket (9) are densely covered with filter holes (901). Its side wall is connected to the clean water outlet (804) on the outer cylinder (8) through the outlet pipe (902). The end of the clean water outlet (804) is connected to the inlet (104) of the premixing chamber. The three-way valve (11) is used to switch the water flow path to enter the normal filtration or backwash mode.

2. The wastewater disinfection device according to claim 1, characterized in that, The filter backwashing unit also includes a filter box (10) disposed inside the filter basket (9). The filter box (10) is located above the water outlet pipe (902). The bottom of the filter box (10) is densely covered with a plurality of second filter holes (1001). The inner wall of the filter basket (9) is connected to a limiting ring (903). The bottom of the filter box (10) is supported on the limiting ring (903).

3. The wastewater disinfection device according to claim 1 or 2, characterized in that, The sealing structure at the top of the filter basket (9) includes a retaining ring (904) that is circumferentially connected to the outer wall of its top end and a fixing ring (807) that is fixed to the inner wall of the outer cylinder (8). Both the retaining ring (904) and the fixing ring (807) are elliptical shapes that are inclined downward on one side to match the opening at the top of the filter basket (9), and the bottom of the retaining ring (904) is in contact with the top of the fixing ring (807). The filter basket (9) is also provided with a handle (905).

4. The wastewater disinfection device according to claim 1, characterized in that, The mixing unit also includes a drive mechanism, which includes a motor (5), a drive shaft (301) and a coupling (16). The motor (5) is fixedly mounted on the first sealing cover (106) of the tank body (1) through a first flange (501). The end of the power output shaft of the motor (5) moves vertically downward through the first sealing cover (106) and is connected to the drive shaft (301) through the coupling (16). The drive shaft (301) is vertically arranged and its bottom end is fixedly connected to the top end of the impeller (3).

5. The wastewater disinfection device according to claim 1, characterized in that, The disinfectant dosing mechanism (7) also includes an annular pipe (701) and an inlet pipe (702). The annular pipe (701) is fixed to the inner wall of the premixing chamber (101) near the top by a clamp (17). The inlet pipe (702) is located outside the tank (1) and its end passes through the side wall of the tank (1) and is connected to the annular pipe (701). Several nozzles (703) are fixed at equal intervals on the annular pipe (701).

6. The wastewater disinfection device according to claim 1, characterized in that, The static mixer (4) is located outside the tank (1). The bottom of the partition (2) is provided with an outlet (201). The bottom end of the outlet (201) is connected to the water inlet of the static mixer (4) through a connecting pipe (202) that penetrates the side wall of the reaction chamber (102). A first valve (13) is provided at the interface between the connecting pipe (202) and the water inlet of the static mixer (4). A second valve (14) is provided on the drain outlet (105) at the bottom of the reaction chamber (102). The sewage pipe (803) is located at the bottom of the outer cylinder (8) and a third valve (15) is provided on it.

7. The wastewater disinfection device according to claim 1, characterized in that, The outer cylinder (8) is provided with an openable second sealing cover (805) at the top. The outer cylinder (8) is fixedly installed on the bracket (18) by the second flange (806). The bracket (18) is fixedly connected to the side wall of the tank (1).

8. The wastewater disinfection device according to claim 1, characterized in that, The inlet end of the three-way valve (11) is connected to the main inlet pipe (12), and the two outlet ends of the three-way valve (11) are connected to the inlet pipe (801) and the backwash pipe (802), respectively.

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