Car washing sewage treatment device
Through the combined structure of an oxygenation tank, equipment tank, air float tank and ultraviolet photolysis tank, ozone gas and ultraviolet rays are used to treat sewage, which solves the problems of sewage blockage and bacterial growth in sewage treatment devices, and achieves efficient sewage recovery and water quality stability.
Patent Information
- Application Number
- CN202422546718.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-21
- Publication Date
- 2025-09-02
- Estimated Expiration
- 2034-10-21
AI Technical Summary
During the use of existing sewage treatment devices, as the amount of water accumulates, the treatment effect gradually deteriorates, and the water quality of the effluent is prone to occur, and the water used is odorous, which carries pathogenic microorganisms and easily causes bacterial growth.
The combined structure of an oxygen-enhancing cell, an equipment pool, a floating pool and an ultraviolet photolysis cell is adopted. The oxygen-enhancing cell is filled with ozone gas and coagulant is added to form nano-scale bubbles. The sewage forms flocs in the air-enhancing cell and enters the ultraviolet photolysis cell for disinfection. The combination of aluminum-based titanium dioxide honeycomb plate and ultraviolet lamp tube is used to completely remove impurities and bacteria.
It effectively solves the problem of pollution blockage, ensures that the quality of the effluent water does not decay, realizes efficient recycling of sewage, reduces operating costs, and does not require manual operation of the equipment automatically. The quality of the effluent water meets the standards and has no odor, which can kill pathogenic microorganisms.
Smart Images
Figure CN223292413U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of sewage treatment, in particular to a car washing sewage treatment device. Background Art
[0002] The wastewater generated by car washing usually contains a large amount of pollutants such as grease, heavy metals, organic matter, microorganisms and bacteria. These wastewaters need to be purified by corresponding purification equipment before they can be used again. The existing sewage treatment equipment mainly uses sand filtration + activated carbon + security filter for treatment.
[0003] During the use of existing sewage treatment equipment, the sewage treatment effect gradually deteriorates as the amount of sewage treated water accumulates, the sand filter is prone to clogging, and a large amount of solid suspended matter will be discharged from the effluent water. The activated carbon gradually loses its effectiveness due to the adsorption of surfactants in the sewage. The activated carbon cannot be regenerated and hazardous waste is generated. The effluent water quality will deteriorate until it becomes unusable. As the suspended matter in the sewage increases, the filter element in the security filter will become clogged and fail, the recycled water will have a strong odor, and the effluent sewage carries pathogenic microorganisms, which is easy to cause bacterial growth.
[0004] Therefore, in view of the fact that the recycled water has a strong odor and the sewage effluent carries pathogenic microorganisms, which is easy to cause bacterial growth, a car wash sewage treatment device can be designed. By removing impurities from the sewage and then installing multiple aluminum-based titanium dioxide honeycomb panels in the device, the sewage will be stratified, causing it to react with ultraviolet rays, thereby solving the above problems. Utility Model Content
[0005] In order to overcome the problems of existing sewage treatment equipment, during use, as the amount of sewage treated water accumulates, the sewage treatment effect gradually deteriorates, the sand filter is prone to clogging, and a large amount of solid suspended matter will be discharged from the effluent water quality. The activated carbon gradually loses its effectiveness as the surfactant in the sewage is adsorbed, and the activated carbon cannot be regenerated, generating hazardous waste. The effluent water quality will deteriorate until it becomes unusable. As the suspended matter in the sewage increases, the filter element in the security filter will become clogged and fail, the recycled water will have a strong odor, and the effluent sewage carries pathogenic microorganisms, which can easily cause bacteria to grow.
[0006] The technical solution of the utility model is: a car wash sewage treatment device, comprising a box body; characterized in that: it also includes a photolysis component; an oxygenation tank for adding a coagulant to the sewage and filling it with gas is provided inside the box body, an equipment tank for placing a water pump is provided at one end of the oxygenation tank, a flotation tank for causing a precipitation reaction in the sewage is provided on one side of the equipment tank, an ultraviolet photolysis tank for disinfecting and purifying the water is provided on one side of the flotation tank, a photolysis component for disinfecting and disinfecting the water by ultraviolet photolysis is provided inside the ultraviolet photolysis tank, the photolysis component includes a cover plate, a honeycomb plate and an ultraviolet lamp tube, and an oxygenation pipe for adding ozone gas to the sewage is provided inside the oxygenation tank.
[0007] Preferably, by combining an aeration tank, an equipment tank, an air flotation tank and an ultraviolet photolysis tank, the recycled water has a stronger odor than the sewage treatment devices currently on the market, and the sewage effluent carries pathogenic microorganisms, which is easy to cause bacterial growth. The present application fills the sewage with ozone gas through the aeration tank and adds a coagulant, so that it passes through the gas-liquid mixing pump in the equipment tank to form nano-scale bubbles and is discharged into the air flotation tank. In the air flotation tank, the impurities in the sewage form flocs, some of which float up and some settle and are discharged. The sewage enters the ultraviolet photolysis tank and is further disinfected by the photolysis component, thereby completely solving the problem of sewage blockage. Long-term use of the equipment will not cause accumulation of pollutants, and the water quality of the effluent can be guaranteed not to decline. The sewage recovery effect is obvious, the surfactants and impurities in the water can be effectively removed, the operating costs are reduced, and the equipment itself has no consumables. The equipment is fully automatic and does not require manual supervision. It has a compact design and small footprint. The effluent water quality meets the standards and has no odor, and can effectively kill pathogenic microorganisms.
[0008] Preferably, the cover plate is located above the ultraviolet photolysis tank, and three groups of honeycomb panels are provided. The three groups of honeycomb panels are linearly arranged along the interior of the ultraviolet photolysis tank, and multiple groups of honeycomb holes are evenly opened on the surface of the honeycomb panels. Lamp holes are opened on the surface of the honeycomb panels, and there are six groups of lamp holes. The six groups of lamp holes are symmetrically arranged along the surface of the honeycomb panels, and the six groups of lamp holes pass through the three groups of honeycomb panels. The three groups of honeycomb panels are combined (the honeycomb panels are aluminum-based titanium dioxide), so that when the sewage enters the ultraviolet photolysis tank, the three groups of honeycomb panels separate the tank, and the sewage forms a deflection after separation, which can fully contact with the ultraviolet lamp, thereby improving the disinfection effect.
[0009] Preferably, six groups of ultraviolet lamps are provided, and the six groups of ultraviolet lamps are evenly distributed inside the six groups of lamp holes. A driver is provided to match the six groups of ultraviolet lamps. The driver is located at the upper end of the cover plate, and the upper ends of the six groups of ultraviolet lamps pass through the cover plate to be connected to the driver. The ultraviolet lamps are combined with the driver so that when the sewage is deflected, the driver can drive the ultraviolet lamps to work. The ultraviolet rays emitted by the ultraviolet lamps can oxidize the residual surfactants in the sewage and remove them. At the same time, the irradiation of the ultraviolet lamps can also kill the bacteria in the water, oxidize and eliminate the odor of the water, so that the sewage can be purified to meet the sewage reuse standards and provide car wash water.
[0010] Preferably, an oxygenation hole is provided on one side of the oxygenation tank, one end of the oxygenation pipe extends through the oxygenation hole to the outer end of the box, and two groups of oxygenation nozzles are provided at intervals on the other end of the oxygenation pipe. Multiple groups of nozzle holes are provided around the surface of the oxygenation nozzle. The oxygenation pipe is combined with the oxygenation nozzle so that the staff can connect an external oxygen supply equipment and inject ozone gas into the sewage through the oxygenation pipe and the oxygenation nozzle to preliminarily kill pathogenic microorganisms, color, odor and smell for pretreatment.
[0011] Preferably, a water inlet is provided on the other side of the aeration tank, and the aeration tank is connected to the equipment tank through the water inlet. A water outlet is provided on one side of the equipment tank, and the equipment tank is connected to the flotation tank through the water outlet. A gas-liquid mixing pump is provided inside the equipment tank, and both ends of the gas-liquid mixing pump are respectively connected to the water inlet and the water outlet. Through the combination of the gas-liquid mixing pump, the water inlet and the water outlet, after the sewage is pretreated, the sewage passes through the gas-liquid mixing pump, so that the impurities, coagulants and bubbles in the water are fully mixed to form flocs. The gas is broken into tiny bubbles by the high-speed impeller in the gas-liquid mixing pump to form nano-scale bubbles, and then discharged into the flotation tank through the outlet of the gas-liquid mixing pump.
[0012] Preferably, two groups of sedimentation slopes are symmetrically provided at the bottom of the flotation tank, a lower slag discharge port is provided at the bottom of the flotation tank, and a plug is provided to match the lower slag discharge port. A one-way slag discharge bucket is provided at the edge of one side of the upper end of the flotation tank, and an upper slag discharge port is provided at the bottom of the one-way slag discharge bucket. By combining the sedimentation slope and the one-way slag discharge bucket, micro-nano bubbles are combined with flocs in the water, and the flocs are supported to the surface of the liquid to form accumulated slag, which is discharged from the upper slag discharge port through the one-way slag discharge bucket under the action of buoyancy. Some flocs that are not combined with bubbles are concentrated at the bottom of the flotation tank through the sedimentation slope and discharged through the lower slag discharge port.
[0013] Preferably, an overflow weir is provided inside the flotation tank below the one-way slag discharge hopper, a baffle is provided inside the overflow weir, a leakage hole is provided on the surface of the baffle, the flotation tank is connected to the ultraviolet photolysis tank through the overflow weir, a clean water outlet is provided at the bottom of the ultraviolet photolysis tank, and multiple groups of pads are linearly provided on both sides of the ultraviolet photolysis tank. The overflow weir and the baffle are combined. Since the overflow weir is located below the one-way slag discharge hopper, the flocs are precipitated above the flotation tank, and the wastewater with slag removed enters the ultraviolet photolysis tank from the overflow weir through the filter holes of the baffle. At the same time, the baffle can block the floating flocs from entering the ultraviolet photolysis tank, and since the flocs are constantly floating, the flocs cannot block the leakage hole, and the purified clean water can be discharged outward through the clean water outlet. The multiple groups of pads support the three groups of honeycomb panels.
[0014] Beneficial effects of the utility model:
[0015] 1. By combining an aeration tank, an equipment tank, a flotation tank, and an ultraviolet photolysis tank, the recycled water has a stronger odor than the current sewage treatment devices on the market. The sewage effluent carries pathogenic microorganisms, which easily causes bacterial growth. This application uses an aeration tank to fill the sewage with ozone gas and adds a coagulant, so that it passes through the gas-liquid mixing pump in the equipment tank to form nano-scale bubbles and is discharged into the flotation tank. In the flotation tank, impurities in the sewage form flocs, some of which float up and some settle and are discharged. The sewage enters the ultraviolet photolysis tank and is further disinfected by the photolysis component, thus completely solving the problem of sewage blockage. Long-term use of the equipment will not cause pollutant accumulation, which can ensure that the effluent water quality does not deteriorate. The sewage recovery effect is obvious, the surfactants and impurities in the water can be effectively removed, the operating costs are reduced, and the equipment itself has no consumables. The equipment operates fully automatically without manual supervision, has a compact design and small footprint, and the effluent water quality meets the standards and is odorless, and can effectively kill pathogenic microorganisms. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 Shown is a schematic diagram of the overall structure of the sewage treatment device of the present utility model;
[0017] Figure 2 Shown is a schematic diagram of the structure of the aeration tank of the sewage treatment device of the present utility model;
[0018] Figure 3 Shown is a schematic diagram of the flotation tank structure of the sewage treatment device of the present utility model;
[0019] Figure 4 Shown is a schematic diagram of the structure of the flotation tank of the sewage treatment device of the present invention from another angle;
[0020] Figure 5 Shown is a schematic diagram of the structure of the photolysis component of the sewage treatment device of the present invention.
[0021] Explanation of the accompanying symbols: 1. Box body; 2. Aeration tank; 3. Equipment tank; 4. Flotation tank; 5. Ultraviolet photolysis tank; 6. Photolysis component; 7. Aeration hole; 8. Aeration pipe; 9. Aeration nozzle; 10. Spray hole; 11. Water inlet; 12. Gas-liquid mixing pump; 13. Water outlet; 14. Sedimentation slope; 15. Lower slag outlet; 16. One-way slag hopper; 17. Upper slag outlet; 18. Clean water outlet; 19. Pad; 20. Overflow weir; 21. Baffle; 22. Leakage hole; 601. Cover plate; 602. Driver; 603. Honeycomb plate; 604. Honeycomb hole; 605. Lamp hole; 606. Ultraviolet lamp. DETAILED DESCRIPTION
[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0023] See also Figure 1-Figure 5 The utility model provides an embodiment: a car wash sewage treatment device, including a photolysis component 6; an oxygenation tank 2 for adding a coagulant and filling gas to the sewage is provided inside the box 1, an equipment pool 3 for placing a water pump is provided at one end of the oxygenation tank 2, a flotation tank 4 for causing a precipitation reaction in the sewage is provided on one side of the equipment pool 3, an ultraviolet photolysis tank 5 for disinfecting and purifying the water is provided on one side of the flotation tank 4, a photolysis component 6 for ultraviolet photolysis disinfection of the water is provided inside the ultraviolet photolysis tank 5, the photolysis component 6 includes a cover plate 601, a honeycomb plate 603 and an ultraviolet lamp tube 606, and an oxygenation pipe 8 for adding ozone gas to the sewage is provided inside the oxygenation tank 2.
[0024] See also Figure 1-Figure 3 In this embodiment, an oxygenation hole 7 is provided on one side of the oxygenation pool 2. One end of an oxygenation pipe 8 passes through the oxygenation hole 7 and extends to the outer end of the box 1. Two groups of oxygenation nozzles 9 are provided at the other end of the oxygenation pipe 8. A plurality of nozzle holes 10 are provided around the surface of the oxygenation nozzle 9. The oxygenation pipe 8 and the oxygenation nozzle 9 are combined so that the staff can connect an external oxygen supply device and inject ozone gas into the sewage through the oxygenation pipe 8 and the oxygenation nozzle 9 to preliminarily kill pathogenic microorganisms, color, odor and smell, and carry out Pretreatment, the other side of the aeration tank 2 is provided with a water inlet 11, the aeration tank 2 is connected to the equipment tank 3 through the water inlet 11, the side of the equipment tank 3 is provided with a water outlet 13, the equipment tank 3 is connected to the flotation tank 4 through the water outlet 13, the interior of the equipment tank 3 is provided with a gas-liquid mixing pump 12 (the gas-liquid mixing pump 12 model is 40QY-6), the two ends of the gas-liquid mixing pump 12 are respectively connected to the water inlet 11 and the water outlet 13, through the gas-liquid mixing pump 12, the water inlet 11 and the water outlet 13 combination After the sewage is pretreated, it passes through the gas-liquid mixing pump 12 to fully mix the impurities, coagulants and bubbles in the water to form floccules. The gas is broken into tiny bubbles by the high-speed impeller in the gas-liquid mixing pump 12 to form nano-scale bubbles, and then discharged into the flotation tank 4 through the outlet of the gas-liquid mixing pump 12. Two sets of sedimentation slopes 14 are symmetrically provided at the bottom of the flotation tank 4. A lower slag discharge port 15 is provided at the bottom of the flotation tank 4, and a plug is provided to match the lower slag discharge port 15. The flotation tank 4 A one-way slag discharge hopper 16 is provided at one edge of the upper end thereof, and an upper slag discharge port 17 is provided at the bottom of the one-way slag discharge hopper 16. The sedimentation slope 14 is combined with the one-way slag discharge hopper 16 to allow the micro-nano bubbles to combine with the flocs in the water, and the flocs are supported to the surface of the liquid to form accumulated scum. Under the action of buoyancy, the scum is discharged from the upper slag discharge port 17 through the one-way slag discharge hopper 16. Some flocs that are not combined with the bubbles are collected at the bottom of the flotation tank 4 through the sedimentation slope 14 and discharged through the lower slag discharge port 15.
[0025] See also Figure 3-Figure 5In this embodiment, an overflow weir 20 is provided inside the flotation tank 4 below the one-way slag discharge hopper 16. A baffle 21 is provided inside the overflow weir 20. A leakage hole 22 is provided on the surface of the baffle 21. The flotation tank 4 is connected to the ultraviolet photolysis tank 5 through the overflow weir 20. A clean water outlet 18 is provided at the bottom of the ultraviolet photolysis tank 5. Multiple groups of pads 19 are linearly provided on both sides of the ultraviolet photolysis tank 5. The overflow weir 20 and the baffle 21 are combined. Since the overflow weir 20 is located below the one-way slag discharge hopper 16, the flocculent material is precipitated above the flotation tank 4, and the wastewater with slag removed flows out of the overflow weir 20 through the filter holes of the baffle 21. Entering into the ultraviolet photolysis tank 5, at the same time, the baffle 21 can block the floating flocs from entering the ultraviolet photolysis tank 5, and because the flocs are constantly floating, the flocs cannot block the leak hole 22, and the purified clean water can be discharged outward through the clean water outlet 18. The three groups of honeycomb panels 603 are supported by multiple groups of pads 19. The cover plate 601 is located above the ultraviolet photolysis tank 5. The honeycomb panels 603 are provided in three groups. The three groups of honeycomb panels 603 are linearly arranged along the interior of the ultraviolet photolysis tank 5. The surface of the honeycomb panels 603 is evenly opened with multiple groups of honeycomb holes 604. The honeycomb panels 603 are provided with a plurality of honeycomb holes 604. The surface of 03 is provided with lamp holes 605, and there are six groups of lamp holes 605. The six groups of lamp holes 605 are symmetrically arranged along the surface of the honeycomb plate 603. The six groups of lamp holes 605 penetrate the three groups of honeycomb plates 603. The three groups of honeycomb plates 603 are combined (the honeycomb plates 603 are aluminum-based titanium dioxide). When the sewage enters the ultraviolet photolysis tank 5, the three groups of honeycomb plates 603 separate the pool. After separation, the sewage forms a deflection and can fully contact with the ultraviolet lamp, thereby improving the disinfection effect. There are six groups of ultraviolet lamp tubes 606. The six groups of ultraviolet lamp tubes 606 are evenly distributed inside the six groups of lamp holes 605. 606 is matched with a driver 602, which is located at the upper end of the cover 601. The upper ends of the six groups of ultraviolet lamps 606 pass through the cover 601 and are connected to the driver 602. Through the combination of the ultraviolet lamps 606 and the driver 602, when the sewage is deflected, the driver 602 can drive the ultraviolet lamps 606 to work. The ultraviolet rays emitted by the ultraviolet lamps 606 can oxidize the residual surfactants in the sewage and remove them. At the same time, the irradiation of the ultraviolet lamps 606 can also kill the bacteria in the water, oxidize and eliminate the odor of the water, so that the sewage can be purified to meet the sewage reuse standards and provide car washing water.
[0026] During the work, the staff first connects the external oxygen supply equipment, and injects ozone gas into the sewage through the oxygenation pipe 8 and the oxygenation nozzle 9 to preliminarily kill pathogenic microorganisms, color, odor and taste, and perform pretreatment. After the sewage is pretreated, the sewage passes through the gas-liquid mixing pump 12, so that the impurities, coagulants and bubbles in the water are fully mixed to form flocs. The gas is broken into tiny bubbles by the high-speed impeller in the gas-liquid mixing pump 12, forming nano-level bubbles, and then discharged into the flotation tank 4 through the outlet of the gas-liquid mixing pump 12.
[0027] Then, under the action of buoyancy, the flocs are discharged from the upper slag discharge port 17 through the one-way slag discharge hopper 16. Some flocs that are not combined with bubbles are concentrated at the bottom of the flotation tank 4 through the sedimentation slope 14 and discharged through the lower slag discharge port 15. Since the overflow weir 20 is located below the one-way slag discharge hopper 16, the flocs are settled above the flotation tank 4, and the wastewater with slag removed enters the ultraviolet photolysis tank 5 from the overflow weir 20 through the filter holes of the baffle 21.
[0028] When the sewage enters the ultraviolet photolysis tank 5, the three groups of honeycomb panels 603 divide the tank, and the sewage forms a baffle after separation. The driver 602 can drive the ultraviolet lamp 606 to work. The ultraviolet light emitted by the ultraviolet lamp 606 can oxidize the residual surfactant in the sewage and remove it. At the same time, the irradiation of the ultraviolet lamp 606 can also kill the bacteria in the water, oxidize and eliminate the odor of the water, so that the sewage is purified to meet the sewage reuse standards and provide car washing water.
[0029] Through the above steps, the oxygenation tank 2, the equipment tank 3, the flotation tank 4 and the ultraviolet photolysis tank 5 are combined, so that compared with the sewage treatment devices currently on the market, the recycled water has a larger odor, and the sewage effluent carries pathogenic microorganisms, which is easy to cause bacterial growth. The present application fills the sewage with ozone gas through the oxygenation tank 2 and adds a coagulant, so that it passes through the gas-liquid mixing pump 12 in the equipment tank 3 to form nano-scale bubbles and is discharged into the flotation tank 4. In the flotation tank 4, the impurities in the sewage form flocs, some of which float up and some are precipitated and discharged. The clean water enters the ultraviolet photolysis tank 5 and is further disinfected by the photolysis component 6, thereby completely solving the problem of sewage blockage.
Claims
1. A car wash wastewater treatment device, comprising a housing (1); characterized in that: The invention also includes a photolysis component (6); an aeration tank (2) for adding a coagulant and filling gas to sewage is provided inside the box (1); an equipment tank (3) for placing a water pump is provided at one end of the aeration tank (2); a flotation tank (4) for causing a sedimentation reaction in sewage is provided on one side of the equipment tank (3); an ultraviolet photolysis tank (5) for disinfecting and purifying water is provided on one side of the flotation tank (4); a photolysis component (6) for disinfecting and purifying water by ultraviolet photolysis is provided inside the ultraviolet photolysis tank (5); the photolysis component (6) includes a cover plate (601), a honeycomb plate (603) and an ultraviolet lamp (606); and an aeration pipe (8) for adding ozone gas to sewage is provided inside the aeration tank (2).
2. A car wash wastewater treatment device according to claim 1, characterized in that: The cover plate (601) is located above the ultraviolet photolysis tank (5), and three groups of honeycomb panels (603) are provided. The three groups of honeycomb panels (603) are linearly arranged along the interior of the ultraviolet photolysis tank (5). The surface of the honeycomb panel (603) is evenly provided with multiple groups of honeycomb holes (604). The surface of the honeycomb panel (603) is provided with lamp holes (605). There are six groups of lamp holes (605), and the six groups of lamp holes (605) are symmetrically arranged along the surface of the honeycomb panel (603). The six groups of lamp holes (605) run through the three groups of honeycomb panels (603).
3. A car wash wastewater treatment device according to claim 2, characterized in that: Six groups of ultraviolet lamp tubes (606) are provided. The six groups of ultraviolet lamp tubes (606) are evenly distributed inside the six groups of lamp holes (605). Drivers (602) are provided to match the six groups of ultraviolet lamp tubes (606). The driver (602) is located at the upper end of the cover plate (601). The upper ends of the six groups of ultraviolet lamp tubes (606) pass through the cover plate (601) and are connected to the driver (602).
4. A car wash wastewater treatment device according to claim 1, characterized in that: An oxygenation hole (7) is provided on one side of the oxygenation pool (2), one end of an oxygenation pipe (8) passes through the oxygenation hole (7) and extends to the outer end of the box (1), and two groups of oxygenation nozzles (9) are provided at intervals on the other end of the oxygenation pipe (8), and a plurality of groups of nozzle holes (10) are provided around the surface of the oxygenation nozzle (9).
5. A car wash wastewater treatment device according to claim 4, characterized in that: A water inlet (11) is provided on the other side of the aeration pool (2), and the aeration pool (2) is communicated with the equipment pool (3) through the water inlet (11). A water outlet (13) is provided on one side of the equipment pool (3), and the equipment pool (3) is communicated with the flotation pool (4) through the water outlet (13). A gas-liquid mixing pump (12) is provided inside the equipment pool (3), and both ends of the gas-liquid mixing pump (12) are connected to the water inlet (11) and the water outlet (13) respectively.
6. A car wash wastewater treatment device according to claim 1, characterized in that: Two sets of sedimentation slopes (14) are symmetrically provided at the bottom of the flotation tank (4). A lower slag discharge port (15) is provided at the bottom of the flotation tank (4). A plug is provided to match the lower slag discharge port (15). A one-way slag discharge hopper (16) is provided at the edge of one side of the upper end of the flotation tank (4). An upper slag discharge port (17) is provided at the bottom of the one-way slag discharge hopper (16).
7. A car wash wastewater treatment device according to claim 6, characterized in that: An overflow weir (20) is provided inside the flotation tank (4) below the one-way slag discharge hopper (16), a baffle (21) is provided inside the overflow weir (20), a leak hole (22) is provided on the surface of the baffle (21), the flotation tank (4) is connected to the ultraviolet photolysis tank (5) through the overflow weir (20), a clean water outlet (18) is provided at the bottom of the ultraviolet photolysis tank (5), and multiple groups of pads (19) are linearly provided on both sides of the ultraviolet photolysis tank (5).