Sewage treatment device

Abstract

The invention discloses a sewage treatment device, and relates to the technical field of sewage treatment, the sewage treatment device comprises a reservoir, a water inlet pipe, a circulating pump, a filter and an ultraviolet sterilizer, the water inlet pipe is connected with a water inlet of the circulating pump, and the water inlet pipe is provided with a water inlet switch valve; a bypass pipe is connected between the water inlet pipe and the reservoir, the bypass pipe is provided with a bypass switch valve, the bypass pipe is located between the water inlet switch valve and a water inlet of the circulating pump, and a water outlet of the circulating pump is connected with a water inlet of the filter through a pipeline. A water outlet of the filter is connected with a water inlet of the ultraviolet sterilizer through a pipeline, and a water outlet of the ultraviolet sterilizer is communicated with the reservoir. The sewage in the reservoir repeatedly flows through the filter and the ultraviolet sterilizer, so that the ultraviolet sterilizer can fully kill microorganisms in the sewage.

Description

Technical Field

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

[0002] Microorganisms in sewage can be killed by ultraviolet irradiation or chemicals. Compared with chemical sterilization methods, ultraviolet irradiation sterilization is easier to operate and manage, and the workload of equipment operation and maintenance is very small; there are no safety hazards such as toxicity, flammability, explosion and corrosiveness that may be caused by the use, transportation and storage of other chemicals.

[0003] However, ultraviolet irradiation sterilization has the disadvantages of being difficult to achieve uniform radiation in the entire treatment space and having shadow areas of irradiation, and the spores and cysts of some microorganisms are highly tolerant, so the effect of ultraviolet irradiation sterilization is greatly insufficient. Summary of the invention

[0004] In order to improve the sterilization effect of microorganisms in sewage treatment while reducing the potential safety hazards in sewage treatment, the present application provides a sewage treatment device.

[0005] The sewage treatment device provided in this application adopts the following technical solution: A sewage treatment device comprises a water reservoir, a water inlet pipe, a circulation pump, a filter and an ultraviolet sterilizer, wherein the water inlet pipe is connected to the water inlet of the circulation pump and is provided with an inlet switch valve; a bypass pipe is connected between the water inlet pipe and the water reservoir, the bypass pipe is provided with a bypass switch valve, the bypass pipe is located between the inlet switch valve and the water inlet of the circulation pump, the water outlet of the circulation pump is connected to the water inlet of the filter through a pipeline, the water outlet of the filter is connected to the water inlet of the ultraviolet sterilizer through a pipeline, and the water outlet of the ultraviolet sterilizer is communicated with the water reservoir.

[0006] By adopting the above technical solution, when the sewage treatment device treats sewage, the bypass switch valve is first closed, and the water inlet switch valve is opened, and the sewage is sucked by the circulating pump. The sewage output by the circulating pump flows through the filter and the ultraviolet sterilizer in sequence, and then discharged into the reservoir. Then the water inlet switch valve is closed, and the bypass switch valve is opened, so that the circulating pump can circulate and suck the water in the reservoir, so that the sewage in the reservoir repeatedly flows through the filter and the ultraviolet sterilizer, so that the ultraviolet sterilizer can kill the microorganisms in the sewage more fully, so as to achieve a disinfection effect close to that of chemical agents, but without the use of chemical reagents, which is conducive to reducing the sewage treatment process and can reduce the potential safety hazards of highly toxic, flammable, explosive and corrosive chemicals that may be caused by the use, transportation and storage of chemicals.

[0007] Optionally, the ultraviolet sterilizer includes a vertical tube and an ultraviolet lamp, the ultraviolet lamp is located on the inner side of the vertical tube and fixedly installed on the top wall of the vertical tube, and the ultraviolet lamp extends to the bottom of the vertical tube; the water inlet of the ultraviolet sterilizer is opened at the lower part of the vertical tube, and the water outlet of the ultraviolet sterilizer is opened at the upper part of the vertical tube.

[0008] By adopting the above technical solution, when sewage flows through the ultraviolet sterilizer, it needs to overcome the resistance of gravity when flowing from bottom to top, so that the speed of water flow is slowed down, which is beneficial to increase the action time of ultraviolet rays on the water flow.

[0009] Optionally, the water outlet height of the ultraviolet sterilizer is higher than the water level of the water reservoir.

[0010] By adopting the above technical solution, the water treated by the ultraviolet sterilizer can impact and stir the water in the reservoir from top to bottom, making it difficult for microorganisms and impurities in the reservoir to adhere to the inner wall of the reservoir, which is beneficial to ensuring the sewage treatment effect.

[0011] Optionally, the vertical tube is provided with a water outlet inclined pipe, and the water outlet inclined pipe is arranged to be inclined upward in a direction away from the vertical tube, and a port of the water outlet inclined pipe serves as a water outlet of the ultraviolet sterilizer.

[0012] By adopting the above technical solution, the water outlet inclined pipe is arranged upwardly and tilted away from the vertical pipe tube, so that the water level in the vertical pipe tube is higher than the connection between the water outlet inclined pipe and the vertical pipe tube. When the water outlet inclined pipe discharges water outward, the water outlet inclined pipe can form a full pipe state, making it difficult for external dust to enter the inner side of the ultraviolet sterilizer, which is beneficial to keeping the internal environment of the ultraviolet sterilizer clean.

[0013] Optionally, an inner elbow is provided at one end of the water outlet inclined pipe close to the vertical tube, the inner elbow is a transparent pipe fitting, the inner elbow is arranged upward away from the port of the water outlet inclined pipe, and the port of the inner elbow away from the water outlet inclined pipe is lower than the outer end of the water outlet inclined pipe.

[0014] By adopting the above technical solution, since the inner elbow is arranged upward away from the port of the water outlet inclined pipe, the water in the vertical tube needs to flow upward to a position close to the liquid surface of the vertical tube before being discharged, so that the water in the vertical tube can be fully disinfected by the ultraviolet light. The water discharged from the water outlet inclined pipe first flows upward to a certain height and then flows downward; in this case, even if the water reservoir is full, the water discharged from the water outlet inclined pipe can still form a height difference with the water surface of the water reservoir, so that the volume of the water reservoir can be fully utilized while meeting the impact stirring requirements.

[0015] Optionally, a condenser is provided on the inner side of the vertical tube, the condenser is located at the top of the vertical tube, the position of the condenser is higher than the outer port of the water outlet inclined pipe, and the focusing point of the condenser is located at the inner port of the inner elbow.

[0016] By adopting the above technical solution, the condenser can reflect the ultraviolet rays of the ultraviolet lamp and focus the ultraviolet rays to the water inlet of the inner elbow, so that the water flow is disinfected by ultraviolet rays with higher light intensity during entering the inner elbow, which is beneficial to improving the sterilization effect.

[0017] Optionally, the water storage tank is provided with two separation tanks, the bypass pipe includes a first main pipe and two first branches, the two first branches are respectively connected to the two separation tanks, the first main pipe is connected to the water inlet pipe, a first three-way valve is commonly connected between the first main pipe and the two first branches, the first three-way valve is used to control the connection state between the first main pipe and the two first branches, and the first three-way valve serves as the bypass switch valve; the first main pipe is provided with a check valve; the ultraviolet sterilizer is provided with a reflux outlet pipe, the reflux outlet pipe includes a second main pipe and a second branch, the two second branches are respectively connected to the two separation tanks, the second main pipe is connected to the water outlet of the ultraviolet sterilizer, a second three-way valve is commonly connected between the second main pipe and the two second branches, and the second three-way valve is used to control the connection state between the second main pipe and the two second branches.

[0018] By adopting the above technical solution, when the sewage treatment device treats sewage, the treated water is first stored in one of the separation tanks, and the other separation tank is in an empty state. Then the water inlet switch valve is closed, the first three-way valve is connected to the separation tank storing water, and the second three-way valve is connected to the other empty separation tank. Then the circulation pump is operated to continuously pump water into the empty separation tank. When the separation tank originally storing water is emptied, the first three-way valve and the second three-way valve are switched again. In this way, the circulation pump continuously pumps sewage, and the sewage repeatedly passes through the filter and the ultraviolet sterilizer. By making the sewage flow between different separation tanks, the sterilized water in each process is not easy to dilute the wastewater to be treated, which is conducive to improving the sewage treatment efficiency.

[0019] Optionally, it also includes a controller and a flow meter, the flow meter is installed at the outlet end of the circulation pump; the first three-way valve and the second three-way valve are both electric valves, the controller is used to collect flow information of the flow meter, and the controller is used to control the operation of the first three-way valve and the second three-way valve.

[0020] By adopting the above technical solution, when the circulation pump evacuates the water in the separation tank, the controller can automatically switch the first three-way valve and the second three-way valve through the flow change signal of the flow meter, thereby realizing automatic and continuous operation of sewage treatment.

[0021] Optionally, a vertical partition is provided in the water reservoir, the vertical partition divides the water reservoir into two separated pools, the vertical partition is horizontally slidingly connected to the water reservoir, and the sliding direction of the vertical partition is perpendicular to the vertical side surface of the vertical partition.

[0022] By adopting the above technical solution, the vertical partition divides the water reservoir into two partitions. When the circulating pump pumps water from one partition to the other, the water level in the water reservoir remains unchanged, and the vertical partition moves automatically when the water volume in the two partitions changes to adapt to the change in the water volume in the two partitions. By using the vertical partition to divide the water reservoir, the space in the water reservoir can be fully utilized, and the space occupied by the water reservoir can be reduced under the premise of processing a certain amount of water. After switching the first three-way valve and the second three-way valve, the vertical partition can move in the opposite direction without manual movement of the vertical partition.

[0023] Optionally, a vertical partition is provided in the water reservoir, and the vertical partition is horizontally slidingly connected to the water reservoir, and the sliding direction of the vertical partition is perpendicular to the vertical side surface of the vertical partition; the water outlet of the water reservoir and the water outlet of the ultraviolet sterilizer are respectively located on both sides of the vertical partition; the vertical partition is provided with a one-way valve, and the one-way valve is used to prevent water from flowing from the side of the vertical partition away from the ultraviolet sterilizer to the side of the vertical partition close to the ultraviolet sterilizer.

[0024] By adopting the above technical solution, when treating sewage, the vertical partition is first moved to the side close to the ultraviolet sterilizer. When the circulating pump is running, the treated sewage is discharged from the ultraviolet sterilizer to the side of the vertical partition close to the ultraviolet tube sterilizer. The water level in the reservoir remains unchanged overall, and the vertical partition will move automatically according to the change in the water volume on both sides of the vertical partition. When the vertical partition moves to the extreme position, the vertical partition is moved and reset. In this process, the sewage on the side of the vertical partition close to the ultraviolet sterilizer can flow from the one-way valve to the side of the vertical partition away from the ultraviolet sterilizer.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: The circulation pump can pump water in the reservoir back and forth, so that the sewage in the reservoir repeatedly flows through the filter and the ultraviolet sterilizer, so that the ultraviolet sterilizer can fully kill the microorganisms in the sewage, thereby achieving a disinfection effect close to that of chemical agents and reducing the safety hazards of toxicity, flammability, explosion and corrosiveness that may be caused by the use, transportation and storage of chemicals.

[0026] By allowing the sewage to flow between different separation tanks, the sterilized water in each channel is less likely to dilute the wastewater to be treated, which is beneficial to improving the sewage treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of Example 1.

[0028] Figure 2 It is a schematic diagram of the internal structure of the ultraviolet disinfector of Example 1.

[0029] Figure 3 It is a schematic diagram of the overall structure of Example 2.

[0030] Figure 4 It is a schematic diagram of the internal structure of the ultraviolet disinfector of Example 2.

[0031] Figure 5 It is a schematic diagram of the overall structure of Example 3.

[0032] Figure 6 It is a schematic diagram of the overall structure of Example 4.

[0033] Figure 7 It is a schematic diagram of the installation positions of the first roller and the second roller in Example 4.

[0034] Figure 8 It is a schematic diagram of the overall structure of Example 5.

[0035] Description of reference numerals: 1. Water storage tank; 11. Separation tank; 2. Water inlet pipe; 21. Water inlet switch valve; 3. Drain pipe; 31. Drain switch valve; 4. Circulation pump; 5. Filter; 6. Ultraviolet sterilizer; 61. Vertical tube; 62. Ultraviolet lamp; 63. Water outlet inclined pipe; 64. Internal elbow; 65. Spectrometer; 66. Backflow outlet pipe; 661. Second main pipe; 662. Second branch pipe; 663. Second three-way valve; 7. Bypass pipe; 71. First main pipe; 72. First branch pipe; 73. Bypass switch valve; 74. Check valve; 8. Vertical partition; 81. First roller; 82. Second roller; 83. One-way valve; 9. Flow meter; 10. Controller. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1-8 This application is described in further detail. Example 1

[0037] The present application embodiment discloses a sewage treatment device. Figure 1The sewage treatment device includes a water reservoir 1, a water inlet pipe 2, a drain pipe 3, a circulation pump 4, a filter 5 and an ultraviolet sterilizer 6. The water inlet pipe 2 is connected to the water inlet of the circulation pump 4, and the water inlet pipe 2 is provided with an inlet switch valve 21. The drain pipe 3 is connected to the bottom of the water reservoir 1, and the drain pipe 3 is provided with a drain switch valve 31; a bypass pipe 7 is connected between the water inlet pipe 2 and the water reservoir 1, and the bypass pipe 7 is provided with a bypass switch valve 73. The bypass pipe 7 is located between the water inlet switch valve 21 and the water inlet of the circulation pump 4. The water outlet of the circulation pump 4 is connected to the water inlet of the filter 5 through a pipeline, and the water outlet of the filter 5 is connected to the water inlet of the ultraviolet sterilizer 6 through a pipeline. The water outlet of the ultraviolet sterilizer 6 is connected to the side wall of the water reservoir 1 through a pipeline.

[0038] The water inlet switch valve 21, the bypass switch valve 73 and the drain switch valve 31 in this embodiment can specifically be a ball valve, a stop valve or a gate valve.

[0039] Reference Figure 2 The ultraviolet sterilizer 6 includes a vertical tube 61 and an ultraviolet lamp 62. The ultraviolet lamp 62 is located inside the vertical tube 61 and fixedly installed on the top wall of the vertical tube 61. The ultraviolet lamp 62 extends to the bottom of the vertical tube 61. The water inlet of the ultraviolet sterilizer 6 is opened at the lower part of the vertical tube 61, and the water outlet of the ultraviolet sterilizer 6 is opened at the upper part of the vertical tube 61. The water outlet height of the ultraviolet sterilizer 6 is higher than the water level of the water reservoir 1.

[0040] The implementation principle of a sewage treatment device in the embodiment of the present application is as follows: when the sewage treatment device treats sewage, the bypass switch valve 73 is first closed, and the water inlet switch valve 21 is opened, and the sewage is sucked by the circulating pump 4. The sewage output by the circulating pump 4 flows through the filter 5 and the ultraviolet sterilizer 6 in sequence, and then discharged into the reservoir 1. The water discharged by the ultraviolet sterilizer 6 can impact and stir the water in the reservoir 1. Then the water inlet switch valve 21 is closed, and the bypass switch valve 73 is opened, so that the circulating pump 4 can pump the sewage in the reservoir 1 repeatedly, so that the sewage in the reservoir 1 repeatedly flows through the filter 5 and the ultraviolet sterilizer 6, so that the ultraviolet sterilizer 6 can fully kill the microorganisms in the sewage. After the water in the reservoir 1 is treated and purified, the drain switch valve is opened and discharged through the drain pipe 3. In other embodiments, the drain pipe 3 may not be provided, and the water in the reservoir 1 can be pumped and discharged by an external water pump. Example 2

[0041] Reference Figure 3 and Figure 4The difference between this embodiment and the first embodiment is that the vertical tube 61 is provided with a water outlet inclined pipe 63, which is arranged to be inclined upward in a direction away from the vertical tube 61, and the port of the water outlet inclined pipe 63 serves as the water outlet of the ultraviolet sterilizer 6. The water discharged from the water outlet inclined pipe 63 first flows upward to a certain height, and then flows downward into the water reservoir 1. The water in the vertical tube 61 can flow through the water outlet inclined pipe 63 in a full tube state, so that dust in the external environment is not easy to enter the vertical tube 61.

[0042] Reference Figure 4 An inner elbow 64 is provided at one end of the water outlet inclined pipe 63 close to the vertical tube 61. The inner elbow 64 is a transparent pipe fitting. The end of the inner elbow 64 away from the water outlet inclined pipe 63 is arranged upward, and the end of the inner elbow 64 away from the water outlet inclined pipe 63 is lower than the outer end of the water outlet inclined pipe 63.

[0043] Reference Figure 4 A condenser 65 is provided on the inner side of the vertical tube 61 , and the condenser 65 is located at the top of the vertical tube 61 . The position of the condenser 65 is higher than the outer port of the water outlet inclined pipe 63 , and the focusing point of the condenser 65 is located at the inner port of the inner elbow 64 .

[0044] The condenser 65 can focus the ultraviolet rays to the water inlet of the inner elbow 64, so that the water flow is disinfected by ultraviolet rays with higher light intensity during entering the inner elbow 64, which is beneficial to improving the sterilization effect. Example 3

[0045] Reference Figure 5 The difference between this embodiment and embodiment 1 is that the water storage tank 1 is provided with two separation tanks 11, the bypass pipe 7 includes a first main pipe 71 and two first branch pipes 72, the two first branch pipes 72 are respectively connected to the two separation tanks 11, the first main pipe 71 is connected to the water inlet pipe 2, a first three-way valve is commonly connected between the first main pipe 71 and the two first branch pipes 72, the first main pipe 71 and the inner cavity of the first three-way valve maintain a constant connection state, the first three-way valve is used to control the connection state between the first main pipe 71 and the two first branch pipes 72, and the first three-way valve serves as a bypass switch valve 73; the first main pipe 71 is provided with a check valve 74.

[0046] The ultraviolet sterilizer 6 is provided with a reflux outlet pipe 66, which includes a second main pipe 661 and a second branch pipe 662. The two second branch pipes 662 are respectively connected to the two partition pools 11. The second main pipe 661 is connected to the water outlet of the ultraviolet sterilizer 6. A second three-way valve 663 is commonly connected between the second main pipe 661 and the two second branch pipes 662. The second main pipe 661 and the inner cavity of the second three-way valve 663 maintain a constant connection state. The second three-way valve 663 is used to control the connection state between the second main pipe 661 and the two second branch pipes 662. The second three-way valve 663 and the first three-way valve are both electric three-way ball valves.

[0047] A flow meter 9 is installed at the outlet end of the circulation pump 4. The sewage treatment device in this embodiment also includes a controller 10, which is electrically connected to the circulation pump 4, the flow meter 9, the first three-way valve and the second three-way valve 663 respectively; the controller 10 is used to collect flow information of the flow meter 9, and is also used to control the operation of the circulation pump 4, the first three-way valve and the second three-way valve 663.

[0048] The working principle of the present embodiment is as follows: when the sewage treatment device treats sewage, the treated water is first stored in one of the partition tanks 11, and the other partition tank 11 is in an empty state. Then the water inlet switch valve 21 is closed, the first three-way valve is connected to the partition tank 11 storing water, and the second three-way valve 663 is connected to the other empty partition tank 11. Then the circulation pump 4 is operated to continuously pump water into the empty partition tank 11. When the partition tank 11 originally storing water is emptied, the first three-way valve and the second three-way valve 663 are switched again. In this way, the circulation pump 4 continuously pumps sewage, and the sewage repeatedly passes through the filter 5 and the ultraviolet sterilizer 6. By making the sewage flow between different partition tanks 11, the water after each filtration and sterilization is not easy to dilute the wastewater to be treated, which is conducive to improving the sewage treatment efficiency. When the circulating pump 4 evacuates the water in the separation tank 11, the controller 10 can automatically switch the first three-way valve and the second three-way valve 663 through the flow change signal of the flow meter 9, thereby realizing automatic and continuous operation of the sewage treatment work. Example 4

[0049] Reference Figure 6 and Figure 7 The difference between this embodiment and embodiment 3 is that a vertical partition 8 is provided in the water reservoir 1, and the vertical partition 8 divides the water reservoir 1 into two partition pools 11; a first roller 81 is provided at the bottom of the vertical partition 8, and the roller can roll along the bottom of the water reservoir 1; a second roller 82 is provided on the top of the vertical partition 8, and the second roller 82 can roll along the top surface of the water reservoir 1. The vertical partition 8 achieves horizontal sliding through the rolling of the first roller 81 and the second roller 82, and the sliding direction of the vertical partition 8 is perpendicular to the vertical side surface of the vertical partition 8.

[0050] The vertical partition 8 divides the water reservoir 1 into two partition pools 11. When the circulating pump 4 pumps water from one partition pool 11 to the other partition pool 11, the water level in the water reservoir 1 remains unchanged, and the vertical partition 8 moves automatically when the water volume in the two partition pools 11 changes to adapt to the change in the water volume in the two partition pools 11. By using the vertical partition 8 to divide the water reservoir 1, the space in the water reservoir 1 can be fully utilized, and the space occupied by the water reservoir 1 can be reduced under the premise of treating a certain amount of water. Example 5

[0051] Reference Figure 8The difference between this embodiment and embodiment 1 is that a vertical partition 8 is provided in the water reservoir 1, a first roller 81 is provided at the bottom of the vertical partition 8, and the roller can roll along the bottom of the water reservoir 1, a second roller 82 is provided at the top of the vertical partition 8, and the second roller 82 can roll along the top surface of the water reservoir 1, and the vertical partition 8 can achieve horizontal sliding through the rolling of the first roller 81 and the second roller 82, and the sliding direction of the vertical partition 8 is perpendicular to the vertical side surface of the vertical partition 8; the water outlet of the water reservoir 1 and the water outlet of the ultraviolet sterilizer 6 are respectively located on both sides of the vertical partition 8.

[0052] The vertical partition 8 is provided with a one-way valve 83, and a through hole connected to the one-way valve 83 is opened on the vertical partition 8. The number of the one-way valve 83 can be set to one or more. The one-way valve 83 is used to prevent water from flowing from the side of the vertical partition 8 away from the ultraviolet sterilizer 6 to the side of the vertical partition 8 close to the ultraviolet sterilizer 6.

[0053] When treating sewage, first move the vertical partition 8 to the side close to the ultraviolet sterilizer 6. When the circulation pump 4 is running, the treated sewage is discharged from the ultraviolet sterilizer 6 to the side of the vertical partition 8 close to the ultraviolet sterilizer. The water level in the reservoir 1 remains unchanged, and the vertical partition 8 moves automatically according to the change of water volume on both sides of the vertical partition 8. When the vertical partition 8 moves to the limit position, the vertical partition 8 is moved to reset. In this process, the sewage on the side of the vertical partition 8 close to the ultraviolet sterilizer 6 can flow from the one-way valve 83 to the side of the vertical partition 8 away from the ultraviolet sterilizer 6.

[0054] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A sewage treatment device, characterized in that: The invention comprises a water reservoir (1), a water inlet pipe (2), a circulation pump (4), a filter (5) and an ultraviolet sterilizer (6), wherein the water inlet pipe (2) is connected to the water inlet of the circulation pump (4), and the water inlet pipe (2) is provided with a water inlet switch valve (21); a bypass pipe (7) is connected between the water inlet pipe (2) and the water reservoir (1), and the bypass pipe (7) is provided with a bypass switch valve (73); the bypass pipe (7) is located between the water inlet switch valve (21) and the water inlet of the circulation pump (4); the water outlet of the circulation pump (4) is connected to the water inlet of the filter (5) through a pipeline; the water outlet of the filter (5) is connected to the water inlet of the ultraviolet sterilizer (6) through a pipeline; and the water outlet of the ultraviolet sterilizer (6) is communicated with the water reservoir (1).

2. A sewage treatment device according to claim 1, characterized in that: The ultraviolet sterilizer (6) comprises a vertical tube (61) and an ultraviolet lamp (62); the ultraviolet lamp (62) is located inside the vertical tube (61) and is fixedly mounted on the top wall of the vertical tube (61); the ultraviolet lamp (62) extends to the bottom of the vertical tube (61); a water inlet of the ultraviolet sterilizer (6) is opened at the lower part of the vertical tube (61), and a water outlet of the ultraviolet sterilizer (6) is opened at the upper part of the vertical tube (61).

3. A sewage treatment device according to claim 2, characterized in that: The water outlet height of the ultraviolet sterilizer (6) is higher than the water level of the water reservoir (1).

4. A sewage treatment device according to claim 2, characterized in that: The vertical tube (61) is provided with a water outlet inclined pipe (63), and the water outlet inclined pipe (63) is arranged to be inclined upward in a direction away from the vertical tube (61), and the end of the water outlet inclined pipe (63) serves as the water outlet of the ultraviolet sterilizer (6).

5. A sewage treatment device according to claim 4, characterized in that: An inner elbow (64) is provided at one end of the water outlet inclined pipe (63) close to the vertical tube (61); the inner elbow (64) is a transparent pipe; a port of the inner elbow (64) away from the water outlet inclined pipe (63) is arranged upward; and a port of the inner elbow (64) away from the water outlet inclined pipe (63) is lower than an outer end of the water outlet inclined pipe (63).

6. A sewage treatment device according to claim 5, characterized in that: A condenser (65) is provided on the inner side of the vertical tube (61). The condenser (65) is located at the top of the vertical tube (61). The position of the condenser (65) is higher than the outer end of the water outlet inclined pipe (63). The focusing point of the condenser (65) is located at the inner end of the inner elbow (64).

7. A sewage treatment device according to claim 1, characterized in that: The water storage tank (1) is provided with two partition tanks (11); the bypass pipe (7) comprises a first main pipe (71) and two first branch pipes (72); the two first branch pipes (72) are respectively connected to the two partition tanks (11); the first main pipe (71) is connected to the water inlet pipe (2); a first three-way valve is commonly connected between the first main pipe (71) and the two first branch pipes (72); the first three-way valve is used to control the connection state between the first main pipe (71) and the two first branch pipes (72); the first three-way valve serves as the bypass switch valve (73); the first main pipe (71) is provided with a check valve The ultraviolet sterilizer (6) is provided with a return water outlet pipe (66), the return water outlet pipe (66) comprising a second main pipe (661) and a second branch pipe (662), the two second branch pipes (662) being connected to the two separation tanks (11) respectively, the second main pipe (661) being connected to the water outlet of the ultraviolet sterilizer (6), the second main pipe (661) and the two second branch pipes (662) being commonly connected with a second three-way valve (663), the second three-way valve (663) being used to control the connection state between the second main pipe (661) and the two second branch pipes (662) respectively.

8. A sewage treatment device according to claim 7, characterized in that: It also includes a controller (10) and a flow meter (9), wherein the flow meter (9) is installed at the outlet end of the circulation pump (4); the first three-way valve and the second three-way valve (663) are both electric valves, and the controller (10) is used to collect flow information of the flow meter (9), and the controller (10) is used to control the operation of the first three-way valve and the second three-way valve (663).

9. A sewage treatment device according to claim 7, characterized in that: A vertical partition (8) is provided in the water reservoir (1), and the vertical partition (8) divides the water reservoir (1) into two partition pools (11). The vertical partition (8) is horizontally slidably connected to the water reservoir (1), and the sliding direction of the vertical partition (8) is perpendicular to the vertical side surface of the vertical partition (8).

10. A sewage treatment device according to claim 1, characterized in that: A vertical partition (8) is provided in the water reservoir (1), the vertical partition (8) and the water reservoir (1) are horizontally slidably connected, and the sliding direction of the vertical partition (8) is perpendicular to the vertical side surface of the vertical partition (8); the water outlet of the water reservoir (1) and the water outlet of the ultraviolet sterilizer (6) are respectively located on both sides of the vertical partition (8); the vertical partition (8) is provided with a one-way valve (83), and the one-way valve (83) is used to prevent water on a side of the vertical partition (8) away from the ultraviolet sterilizer (6) from flowing toward a side of the vertical partition (8) close to the ultraviolet sterilizer (6).

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