A wastewater treatment device

Abstract

This utility model relates to the field of wastewater treatment technology and discloses a wastewater treatment device, including a treatment tank, a mixing mechanism, and a filtration mechanism. A connecting pipe connects the treatment tank and the filtration mechanism, and the filtration mechanism is also connected to a drain pipe. The filtration mechanism includes a filter box, a cover, filter elements, a connecting pipe, and a rotary joint. The filter box contains filter tanks, with at least two filter tanks spaced at intervals around the central axis of the filter box. Each filter tank contains a filter element. The cover is rotatably mounted on the top of the filter box and has a water inlet. The connecting pipe connects to the water inlet. The rotary joint seals the connection between the connecting pipe and the connecting pipe and can rotate vertically. Multiple filter elements serve a partial usage and partial backup function. When some filter elements become clogged, the cover can be rotated to connect the water inlet to a backup filter tank. The clogged filter element can then be removed and replaced without interrupting the treatment process, significantly improving wastewater treatment efficiency.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a wastewater treatment device. Background Technology

[0002] Thermal power plants use combustibles (mainly coal) as fuel to produce electricity. During the thermal power generation process, the combustion of coal produces a large amount of sulfur and nitrogen-containing pollutants. Thermal power plants generally adopt desulfurization and denitrification technologies to reduce environmental pollution caused by exhaust gases.

[0003] The desulfurization and denitrification process generates a large amount of wastewater. This wastewater has a complex composition, containing high levels of suspended solids, heavy metal ions (such as lead, mercury, and cadmium), sulfates, sulfites, nitrates, and fluorides. If this wastewater is discharged directly without proper treatment, it will not only cause serious pollution to soil, water bodies, and the ecological environment, but may also endanger human health and the survival of animals and plants. Currently, the main methods for treating desulfurization and denitrification wastewater from thermal power plants include chemical precipitation, membrane treatment, and evaporation crystallization. Among them, chemical precipitation involves adding limestone and a flocculant and mixing them thoroughly to form precipitates, which are then filtered through a screen to achieve solid-liquid separation.

[0004] However, in actual operation, as impurities are continuously intercepted and accumulated on the filter screen surface, the effective filtration area of ​​the filter screen gradually shrinks, leading to an increase in the system's operating resistance. At this point, it is necessary to stop the machine, remove the filter screen for cleaning, and the process of disassembling, cleaning, and reinstalling the filter screen takes a long time, causing the treatment process to be interrupted, thereby affecting the wastewater treatment efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a wastewater treatment device to solve the problem that the removal and cleaning of filter screens in the existing wastewater treatment process is time-consuming and affects the efficiency of wastewater treatment.

[0006] To achieve the above objectives, this utility model provides a wastewater treatment device, including a treatment tank, a mixing mechanism, and a filtering mechanism. The treatment tank is connected to an inlet pipe, and a connecting pipe connects the treatment tank and the filtering mechanism. The filtering mechanism is also connected to a drain pipe, and the mixing mechanism is located in the treatment tank.

[0007] The filtration mechanism includes a filter box, a box cover, filter elements, a connecting pipe, and a rotary joint. The filter box contains filter tanks that communicate with the drain pipe. At least two filter tanks are spaced apart around the central axis of the filter box, and each filter tank contains a filter element. The box cover is rotatably mounted on the top of the filter box in a vertical direction. The box cover has a water inlet, and the connecting pipe is connected to the water inlet. The rotary joint seals and connects the connecting pipe to the connecting pipe. The rotary joint can rotate in a vertical direction. During its rotation stroke, the box cover can drive the connecting pipe to rotate around the rotary joint, so that the water inlet communicates with part of the filter tank.

[0008] Optionally, the filter element includes a filter cylinder and a filter screen disposed inside the filter cylinder. Both the upper and lower ends of the filter cylinder are open structures, and the filter cylinder can be detachably disposed within the filter groove.

[0009] Optionally, the outer wall of the filter cylinder is provided with a positioning block, and the wall of the filter tank is provided with a positioning groove extending vertically, and the positioning block is adapted to the positioning groove.

[0010] Optionally, the filter element further includes a mounting bracket and a cleaning component. The mounting bracket is fixedly connected to the filter cartridge, and the cleaning component is disposed on the mounting bracket and is used to clean the filter screen.

[0011] Optionally, the cleaning assembly includes an impeller, a drive shaft, and a brush. The impeller drive shaft is rotatably mounted on the mounting bracket, the impeller is fixedly mounted on the top end of the drive shaft, and the brush is fixedly mounted on the bottom end of the drive shaft, with the brush in contact with the filter screen.

[0012] Optionally, the cover is further provided with a cleaning port and a sealing cover. The cleaning port and the water inlet are spaced apart around the central axis of the filter box. The size of the cleaning port is greater than or equal to the size of the filter tank. The sealing cover covers the cleaning port and is detachably connected to the cover.

[0013] Optionally, the lid is also provided with a handle, which is offset from the central axis of the lid.

[0014] Optionally, the mixing mechanism includes a motor, a transmission assembly, and a rotating shaft. The motor is fixedly connected to the processing box, the rotating shaft extends vertically into the processing box, the transmission assembly drivesly connects the motor and the rotating shaft, and the rotating shaft is also provided with a stirring rod.

[0015] Optionally, the transmission assembly includes a driving gear and a driven gear that mesh with each other, the driving gear being fixedly connected to the output shaft of the motor, and the driven gear being fixedly connected to the rotating shaft.

[0016] Optionally, multiple stirring rods are arranged circumferentially along the rotating shaft, and each stirring rod is distributed axially along the rotating shaft.

[0017] Compared with the prior art, the wastewater treatment equipment of this utility model embodiment has the following advantages: the filter box of the filter mechanism is provided with at least two filter tanks at intervals, and each filter tank is provided with filter elements. Multiple filter elements can be used for some and spared for others. When the box cover is rotated, it can drive the connecting pipe to rotate around the rotary joint, changing the position of the water inlet. When some filter elements become blocked and need to be disassembled and replaced, the box cover can be rotated to connect the water inlet with the spare filter tank. The wastewater is filtered by the spare filter elements and discharged through the drain pipe. At this time, the blocked filter elements can be disassembled and replaced without interrupting the treatment process, reducing equipment downtime and significantly improving wastewater treatment efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the wastewater treatment equipment of this utility model;

[0019] Figure 2 yes Figure 1 A schematic diagram of the mixing mechanism of a wastewater treatment equipment;

[0020] Figure 3 for Figure 1 A schematic diagram of the filtration mechanism of a wastewater treatment equipment;

[0021] Figure 4 for Figure 3 A cross-sectional structural diagram of the filtration mechanism;

[0022] Figure 5 for Figure 4 A schematic diagram of the structure of the filter element in a wastewater treatment equipment;

[0023] Figure 6 for Figure 5 A schematic diagram of the cleaning assembly for the filter element.

[0024] In the diagram, 1. Processing box, 2. Mixing mechanism, 21. Rotating shaft, 22. Stirring rod, 23. Driven gear, 24. Motor, 25. Drive gear, 3. Feed port, 4. Water inlet pipe, 5. Support, 6. Connecting pipe, 7. Filtering mechanism, 71. Filter box, 711. Positioning groove, 72. Box cover, 73. Connecting pipe, 74. Rotary joint, 75. Cleaning port, 76. Sealing cover, 77. Handle, 78. Filter element, 781. Filter cylinder, 782. Positioning block, 783. Filter screen, 784. Impeller, 785. Drive shaft, 786. Mounting bracket, 787. Brush, 79. Filter tank, 8. Drain pipe. Detailed Implementation

[0025] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0026] A preferred embodiment of the wastewater treatment equipment of this utility model is as follows: Figures 1 to 6 As shown, the wastewater treatment equipment includes a treatment tank 1, a mixing mechanism 2, a filtration mechanism 7, and a support 5. The treatment tank 1 is used to purify wastewater, the mixing mechanism 2 is used to stir and mix the wastewater in the treatment tank 1 to produce precipitates, and the filtration mechanism 7 is used to filter the precipitates in the treated wastewater.

[0027] like Figure 1 As shown, the support 5 is a frame structure formed by welding profiles. Both the treatment tank 1 and the filtration mechanism 7 are mounted on the support 5. The height of the treatment tank 1 is greater than the height of the filtration mechanism 7, so that wastewater can flow from the treatment tank 1 into the filtration mechanism 7 under gravity. In this embodiment, the treatment tank 1 is fixed to the support 5 by welding.

[0028] A water inlet pipe 4 is installed on one side of the treatment tank 1, and a connecting pipe 6 is connected to the other side of the treatment tank 1. The connecting pipe 6 is connected to the bottom of the treatment tank 1. The water inlet pipe 4 is used for industrial wastewater to enter the treatment tank 1, and the connecting pipe 6 is used for the treated wastewater to be discharged from the treatment tank 1. A valve is also installed on the connecting pipe 6 to control the opening and closing of the connecting pipe 6. A feed port 3 is also installed on the top of the treatment tank 1, which is used to add limestone and flocculants and other treatment reagents into the treatment tank 1.

[0029] Mixing mechanism 2 is located in treatment tank 1. After the treatment reagent is added into treatment tank 1 through feeding port 3, mixing mechanism 2 thoroughly stirs the treatment reagent and wastewater, causing the wastewater to react with limestone, flocculant, etc., to form precipitate. Then, the valve on connecting pipe 6 can be opened to discharge the wastewater and the generated precipitate into connecting pipe 6, and then send it to filtration mechanism 7 through connecting pipe 6. Filtration mechanism 7 is also connected to drain pipe 8. Filtration mechanism 7 can filter out the precipitate in the wastewater, and the filtered water is discharged through drain pipe 8 for further treatment.

[0030] like Figure 3 As shown, the filtration mechanism 7 includes a filter box 71, a cover 72, filter elements 78, a connecting pipe 73, and a rotary joint 74. The filter box 71 is fixedly connected to the bracket 5 by welding. A filter tank 79 is provided inside the filter box 71, and the filter elements 78 are disposed within the filter tank 79. The filter tank 79 is connected to a drain pipe 8 to discharge the water filtered by the filter elements 78. At least two filter tanks 79 are spaced apart around the central axis of the filter box 71, and each filter tank 79 contains a filter element 78. The filter elements 78 are detachably connected to the filter tank 79 so that they can be removed from the filter tank 79 for cleaning when needed.

[0031] Each filter tank 79 is independent of each other, and each filter element 78 can be used partially or as a backup. When some filter elements 78 are blocked, other filter elements 78 can be used to filter wastewater. The blocked filter elements 78 can be replaced and cleaned to avoid the interruption of processing caused by the need to stop the machine to remove and clean the filter screen 783 due to blockage in the existing technology.

[0032] The cover 72 is rotatably mounted on the top of the filter box 71 in a vertical direction. A sealing ring is provided between the cover 72 and the filter box 71 to ensure the sealing of the cover 72 during rotation. In this embodiment, both the filter box 71 and the cover 72 are circular, and the rotation center line of the cover 72 is the central axis of the filter box 71. The top of the cover 72 is provided with a water inlet, which is connected to the connecting pipe 73. A rotary joint 74 seals the connection between the connecting pipe 6 and the connecting pipe 73. When the connecting pipe 73 rotates around the rotary joint 74, a sealed fit is maintained between the connecting pipe 73 and the rotary joint 74. In this embodiment, the rotary joint 74 and the cover 72 are coaxially arranged to ensure that the rotation axes of the cover 72 and the connecting pipe 73 coincide. In other embodiments, the connecting pipe 73 can also be a telescopic pipe, in which case the rotary joint 74 can be offset from the center of the cover 72.

[0033] During rotation, the cover 72 drives the connecting pipe 73 to rotate around the rotary joint 74, thereby changing the position of the inlet. During normal wastewater treatment, the inlet is connected to a portion of the filter tank 79. The wastewater is then filtered through the filter element 78 within this portion of the filter tank 79, and the filtered water is discharged through the drain pipe 8. When the filter element 78 in this portion of the filter tank 79 becomes clogged, the cover 72 can be rotated, causing the connecting pipe 73 to rotate synchronously, connecting the inlet to another portion of the filter tank 79. This allows for the removal and replacement of the clogged filter element 78, reducing equipment downtime.

[0034] In this embodiment, there are two filter tanks 79 and two filter elements 78. The two filter tanks 79 are symmetrically arranged in the filter box 71. The bottom of the filter box 71 has a collection tank that communicates with both filter tanks 79. The collection tank can collect the filtered water. When one filter element 78 is blocked, the box cover 72 can be rotated 180 degrees to connect the connecting pipe 73 and the water inlet to the other filter tank 79. In other embodiments, the number of filter tanks 79 and filter elements 78 can be increased to three, four, etc., as needed.

[0035] The filter mechanism 7 of this wastewater treatment equipment has at least two filter tanks 79 spaced apart in the filter box 71. Each filter tank 79 is equipped with a filter element 78. Multiple filter elements 78 can be used in some cases and kept as spares. When the box cover 72 rotates, it can drive the connecting pipe 73 to rotate around the rotary joint 74, changing the position of the water inlet. When some filter elements 78 become clogged and need to be removed and replaced, the box cover 72 can be rotated to connect the water inlet with the spare filter tank 79. The wastewater is filtered by the spare filter element 78 and discharged through the drain pipe 8. At this time, the clogged filter element 78 can be removed and replaced without interrupting the treatment process, reducing equipment downtime and significantly improving wastewater treatment efficiency.

[0036] In some embodiments, the filter element 78 includes a filter cylinder 781 and a filter screen 783 disposed within the filter cylinder 781. Both the upper and lower ends of the filter cylinder 781 are open structures, and the filter cylinder 781 is detachably disposed within the filter groove 79.

[0037] like Figure 4 As shown, the filter element 78 is formed by a filter cylinder 781 and a filter screen 783. The filter cylinder 781 provides support for the filter screen 783 to ensure that the filter screen 783 filters out sediments in the wastewater. The filter cylinder 781 is detachably connected to the filter tank 79. When the filter screen 783 is clogged, the filter cylinder 781 can be removed from the filter tank 79, and the filter screen 783 can be removed simultaneously for cleaning. In other embodiments, the filter screen 783 can be detachably connected to the filter cylinder 781, and the filter screen 783 can be directly removed for cleaning.

[0038] In some embodiments, the outer wall of the filter cylinder 781 is provided with a positioning block 782, and the wall of the filter groove 79 is provided with a positioning groove 711 extending vertically, and the positioning block 782 is adapted to the positioning groove 711.

[0039] The positioning block 782 is adapted to the positioning groove 711, which not only prevents the filter cartridge 781 from rotating within the filter groove 79, thus positioning the filter cartridge 781, but also provides support and limitation for the positioning block 782. The filter cartridge 781 can be directly installed in the filter groove 79 by placement. When it is necessary to remove the filter cartridge 781 to clean the filter screen 783, it can be removed by pulling upwards, simplifying the assembly and disassembly of the filter cartridge 781. In this embodiment, there are four positioning blocks 782 and four positioning grooves 711, which are evenly distributed around the axial direction of the filter cartridge 781.

[0040] In some embodiments, the filter element 78 further includes a mounting bracket 786 and a cleaning component. The mounting bracket 786 is fixedly connected to the filter cartridge 781, and the cleaning component is disposed on the mounting bracket 786 and is used to clean the filter screen 783.

[0041] like Figure 5 and Figure 6 As shown, a mounting bracket 786 is fixedly installed inside the filter cartridge 781 for installing a cleaning component. When filtering wastewater, the cleaning component can clean the filter holes of the filter screen 783, thus slowing down the clogging speed of the filter screen 783.

[0042] In some embodiments, the cleaning assembly includes an impeller 784, a drive shaft 785, and a brush 787. The impeller 784 and drive shaft 785 are rotatably mounted on a mounting bracket 786. The impeller 784 is fixedly mounted on the top end of the drive shaft 785, and the brush 787 is fixedly mounted on the bottom end of the drive shaft 785. The brush 787 is in contact with a filter screen 783.

[0043] In this embodiment, the impeller 784 is located at the center of the mounting bracket 786 and is coaxially arranged with the filter cartridge 781. When water flows into the filter tank 79 through the connecting pipe 73, the water flow can drive the impeller 784 to rotate. The impeller 784 can serve as the power source for the brush 787 to clean the filter screen 783. It drives the brush 787 to rotate through the drive shaft 785. During the rotation, the brush 787 can clean the sediment on the green screen, delaying the clogging of the filter screen 783. There is no need to set up a separate power mechanism, which simplifies the structure of the cleaning component.

[0044] In some embodiments, the cover 72 is further provided with a cleaning port 75 and a sealing cover 76. The cleaning port 75 and the water inlet are spaced apart around the central axis of the filter box 71. The size of the cleaning port 75 is greater than or equal to the size of the filter tank 79. The sealing cover 76 covers the cleaning port 75 and is detachably connected to the cover 72.

[0045] like Figure 3 As shown, a cleaning port 75 and a sealing cap 76 are provided on the cover 72. During normal wastewater filtration, the sealing cap 76 covers and seals the cleaning port 75, ensuring that the filter box 71 is in a sealed state. When it is necessary to clean the filter screen 783 of the filter element 78, the sealing cap 76 can be removed to open the cleaning port 75, and the filter element 78 can be taken out from the cleaning port 75 for easy cleaning of the filter screen 783. In this embodiment, the sealing cap 76 is fixed to the top of the cover 72 by magnetic attraction.

[0046] In other embodiments, the cover 72 may be formed by two hinged cover plates, with the water inlet located on one cover plate and the cleaning port 75 located on the other cover plate, allowing the filter element 78 to be removed and the filter screen 783 to be cleaned by opening the cover plate; alternatively, the cleaning port 75 may be provided on the filter box 71 to facilitate the removal of the filter element 78.

[0047] In some embodiments, the lid 72 is also provided with a handle 77, which is offset from the central axis of the lid 72.

[0048] The handle 77 is offset from the central axis of the tank cover 72. The operator can rotate the tank cover 72 by the handle 77 to adjust the position of the water inlet, making the operation easier and more convenient.

[0049] In some embodiments, the mixing mechanism 2 includes a motor 24, a transmission assembly and a rotating shaft 21. The motor 24 is fixedly connected to the processing box 1, the rotating shaft 21 extends vertically into the processing box 1, the transmission assembly drives the motor 24 and the rotating shaft 21, and the rotating shaft 21 is also provided with a stirring rod 22.

[0050] like Figure 2 As shown, motor 24 is the power source of mixing mechanism 2. It drives rotating shaft 21 to rotate through transmission assembly. Rotating shaft 21 can drive stirring rod 22 on it to rotate synchronously, so as to fully stir limestone, flocculant and wastewater, so that they are mixed and react to form precipitate.

[0051] In some embodiments, the transmission assembly includes a driving gear 25 and a driven gear 23 that mesh with each other. The driving gear 25 is fixedly connected to the output shaft of the motor 24, and the driven gear 23 is fixedly connected to the rotating shaft 21.

[0052] The drive gear 25 and driven gear 23 form a transmission assembly. The gear transmission has good precision and accurate transmission ratio. At the same time, the rotational speed of the shaft 21 can be changed by changing the size of the drive gear 25 and driven gear 23, which is convenient to use.

[0053] In some embodiments, a plurality of stirring rods 22 are arranged circumferentially along the rotating shaft 21, and each stirring rod 22 is distributed axially along the rotating shaft 21.

[0054] Stirring rods are evenly spaced along the circumference and axial direction of the rotating shaft 21, which can increase the number of stirring rods and stir the wastewater and treatment reagents in various positions in the treatment tank 1, thereby improving the stirring efficiency and ensuring uniform mixing in all places.

[0055] The working process of this utility model is as follows:

[0056] Wastewater enters treatment tank 1 through inlet pipe 4. At the same time, limestone and flocculant are added from the feed port 3 at the top of treatment tank 1. The motor 24 of mixing mechanism 2 drives the drive gear 25 to rotate, which drives the rotating shaft 21 and stirring rod 22 to rotate through the meshing driven gear 23, so as to fully mix the wastewater, limestone and flocculant, and promote the reaction of pollutants with the reagent to form precipitates.

[0057] Open the valve on the connecting pipe 6. The reacted mixture flows through the connecting pipe 6 and the rotary joint 74 into the connecting pipe 73, and then into one of the filter elements 78 in the filter box 71. The filter screen 783 intercepts the sediment. At the same time, the water flow impacts the impeller 784 to rotate. The impeller 784 drives the brush 787 to rotate through the drive shaft 785 and cleans the impurities on the filter screen 783. The filtered filtrate flows through the filter cylinder 781 into the collection tank at the bottom of the filter box 71 and is discharged through the drain pipe 8 for further treatment.

[0058] When the filter screen 783 of the filter element is clogged by impurities, the handle 77 drives the cover 72 to rotate 180 degrees, so that the connecting pipe 73 is switched to the top of another filter element 78 to continue the filtration operation. At this time, the sealing cover 76 can be opened and the clogged filter element 78 can be taken out from the cleaning port 75. The filter cylinder 781 can be quickly removed by the cooperation of the positioning block 782 and the positioning groove 711, and the filter screen 783 can be cleaned.

[0059] In summary, this utility model embodiment provides a wastewater treatment device. The filter mechanism has at least two filter tanks spaced apart within its filter box, each containing a filter element. Multiple filter elements can be used in combination, with some in reserve. During rotation, the box cover can drive the connecting pipe to rotate around the rotary joint, changing the position of the inlet. When some filter elements become clogged and need to be replaced, the box cover can be rotated to connect the inlet to a spare filter tank. Wastewater is filtered by the spare filter element and discharged through the drain pipe. At this point, the clogged filter element can be removed and replaced without interrupting the treatment process, reducing equipment downtime and significantly improving wastewater treatment efficiency.

[0060] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A wastewater treatment apparatus, characterized by, It includes a treatment tank (1), a mixing mechanism (2) and a filtering mechanism (7). The treatment tank (1) is connected to a water inlet pipe (4). A connecting pipe (6) connects the treatment tank (1) and the filtering mechanism (7). The filtering mechanism (7) is also connected to a drain pipe (8). The mixing mechanism (2) is located in the treatment tank (1). The filtration mechanism (7) includes a filter box (71), a box cover (72), filter elements (78), a connecting pipe (73), and a rotary joint (74). The filter box (71) is provided with filter grooves (79) that communicate with the drain pipe (8). At least two filter grooves (79) are spaced apart around the central axis of the filter box (71). Each filter groove (79) is provided with the filter element (78). The box cover (72) is rotatably mounted on the top of the filter box (71) in a vertical direction. The box cover (72) has a water inlet. The connecting pipe (73) is connected to the water inlet. The rotary joint (74) seals and connects the connecting pipe (6) and the connecting pipe (73). The rotary joint (74) can rotate in a vertical direction. During the rotation stroke, the box cover (72) can drive the connecting pipe (73) to rotate around the rotary joint (74) so ​​that the water inlet communicates with part of the filter grooves (79).

2. The wastewater treatment apparatus according to claim 1, characterized by The filter element (78) includes a filter cylinder (781) and a filter screen (783) disposed in the filter cylinder (781). Both the upper and lower ends of the filter cylinder (781) are open structures, and the filter cylinder (781) can be detachably disposed in the filter groove (79).

3. The wastewater treatment apparatus according to claim 2, characterized by The outer wall of the filter cylinder (781) is provided with a positioning block (782), and the wall of the filter groove (79) is provided with a positioning groove (711) extending vertically. The positioning block (782) is adapted to the positioning groove (711).

4. The wastewater treatment apparatus according to claim 2, characterized by The filter element (78) further includes a mounting bracket (786) and a cleaning component. The mounting bracket (786) is fixedly connected to the filter cartridge (781), and the cleaning component is disposed on the mounting bracket (786) and is used to clean the filter screen (783).

5. The wastewater treatment equipment according to claim 4, characterized in that, The cleaning assembly includes an impeller (784), a drive shaft (785), and a brush (787). The impeller (784) and drive shaft (785) are rotatably mounted on the mounting bracket (786). The impeller (784) is fixedly mounted on the top end of the drive shaft (785), and the brush (787) is fixedly mounted on the bottom end of the drive shaft (785). The brush (787) is in contact with the filter screen (783).

6. The wastewater treatment equipment according to any one of claims 1-5, characterized in that, The cover (72) is also provided with a cleaning port (75) and a sealing cover (76). The cleaning port (75) and the water inlet are spaced apart around the central axis of the filter box (71). The size of the cleaning port (75) is greater than or equal to the size of the filter tank (79). The sealing cover (76) covers the cleaning port (75). The sealing cover (76) is detachably connected to the cover (72).

7. The wastewater treatment apparatus according to any one of claims 1 to 5, characterized by The lid (72) is also provided with a handle (77), which is offset from the central axis of the lid (72).

8. The wastewater treatment apparatus according to any one of claims 1 to 5, characterized by The mixing mechanism (2) includes a motor (24), a transmission assembly and a rotating shaft (21). The motor (24) is fixedly connected to the processing box (1). The rotating shaft (21) extends vertically into the processing box (1). The transmission assembly drives the motor (24) and the rotating shaft (21). The rotating shaft (21) is also provided with a stirring rod (22).

9. The wastewater treatment apparatus according to claim 8, characterized by The transmission assembly includes a driving gear (25) and a driven gear (23) that mesh with each other. The driving gear (25) is fixedly connected to the output shaft of the motor (24), and the driven gear (23) is fixedly connected to the rotating shaft (21).

10. The wastewater treatment apparatus according to claim 8, characterized by The stirring rods (22) are arranged in multiple circumferentially along the rotating shaft (21), and each stirring rod (22) is distributed axially along the rotating shaft (21).

Images