sewage treatment tank

Abstract

The application discloses a sewage treatment tank, which comprises a tank body, a partition plate, a grid support plate, an activated sludge treatment device, a flocculant adding device, a filtering device and a disinfecting device. The tank body is arranged to integrate the activated sludge treatment device, the flocculant adding device, the filtering device and the disinfecting device together. The sewage flow channel in a spiral shape is arranged to realize the purpose of centralized installation of the devices, so that the land occupation area of the whole sewage treatment tank is reduced. The activated sludge treatment device is arranged to add activated sludge to sewage through the Venturi effect, to aerate while adding activated sludge, to increase the sewage treatment speed, and to add flocculants uniformly through the sliding of the joint feeding head, to ensure the flocculation effect of the sewage, so as to ensure the sedimentation effect. The stirring assembly on the disinfecting device stirs to make the disinfection more thorough and uniform.

Description

Technical Field

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

[0002] Wastewater treatment is commonly used in various factories or municipal projects. Wastewater treatment is generally carried out in wastewater treatment ponds. In the past, wastewater treatment ponds occupied a large area, and the addition of treatment auxiliary materials relied on manual addition or simple pumps. Manual addition was time-consuming and labor-intensive, while pumping could not ensure that the treatment auxiliary materials were evenly distributed, affecting the treatment effect. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a sewage treatment tank that eliminates the trouble of manual feeding, ensures uniform feeding, and achieves good treatment results.

[0004] A wastewater treatment tank according to an embodiment of the present invention includes a tank body, a baffle plate, a grid support plate, an activated sludge treatment device, a flocculant addition device, a filtration device, and a disinfection device. A wastewater flow channel is provided inside the tank body, the wastewater flow channel being spiral-shaped, with the end of the wastewater flow channel furthest from the spiral center designated as the inlet and the end of the wastewater flow channel closest to the spiral center designated as the outlet. The baffle plate is detachably disposed within the wastewater flow channel, dividing the wastewater flow channel into a primary filtration chamber, an activated sludge treatment chamber, a sedimentation chamber, a secondary filtration chamber, and a disinfection chamber. The primary filtration chamber, the activated sludge treatment chamber, the sedimentation chamber, the secondary filtration chamber, and the disinfection chamber are arranged in a stepped manner. The grid support plate... The grid support plate is connected to the tank body and positioned above the sewage flow channel; the activated sludge treatment device includes an activated sludge storage tank, an aeration pump, and a distribution head. Several distribution heads are provided, each connected to the air outlet of the aeration pump via a Venturi tube. The distribution heads are evenly distributed along the path of the activated sludge treatment chamber. The activated sludge storage tank is connected to the narrowing point of the Venturi tube. The activated sludge storage tank, the aeration pump, and the distribution heads are all mounted on the grid support plate; the flocculant addition device includes a first water level detector, a support frame, a series of feeding heads, a first solenoid valve, and a feeding trough. The first water level detector is located on the inner wall of the sedimentation chamber. The first water level detector is used to detect the water level in the sedimentation chamber. The bracket is detachably connected to the grid support plate. The feed trough is connected to the bracket and is used to load flocculant. The row of feed heads is slidably mounted on the bracket along the path of the sedimentation chamber. The row of feed heads is connected to the feed trough through the first solenoid valve. A pump is connected to the pipeline between the first solenoid valve and the feed trough. The first solenoid valve is electrically connected to the first water level detector. The first water level detector is used to detect the water level in the sedimentation chamber to control the opening and closing of the first solenoid valve. The pump is used to pump the flocculant from the feed trough into the row of feed heads. A feed head is used to add flocculant to the sedimentation chamber; a filtration device is installed at the upper end of the secondary filtration chamber, and the filtration device is used to filter the water discharged from the sedimentation chamber; the disinfection device includes a second water level detector, a loading tank, a second solenoid valve, and a stirring assembly. The second water level detector is located on the inner wall of the disinfection chamber. The loading tank and the stirring assembly are both located on the grid support plate. The stirring head of the stirring assembly extends into the disinfection chamber. The loading tank is connected to the second solenoid valve through a hose. The second water level detector is electrically connected to the second solenoid valve. The second water level detector is used to detect the water level to control the opening and closing of the second solenoid valve. The stirring assembly is used to stir the water in the disinfection chamber.

[0005] According to an embodiment of the present invention, a wastewater treatment tank has at least the following beneficial effects: the tank body integrates the activated sludge treatment device, the flocculant addition device, the filtration device, and the disinfection device. The spirally arranged wastewater flow channel achieves centralized installation of these devices, reducing the overall footprint of the wastewater treatment tank. Furthermore, the activated sludge treatment device can add activated sludge to the wastewater through the Venturi effect, and can simultaneously aerate the wastewater, increasing the treatment speed. The flocculant addition device achieves uniform feeding through the sliding of the connected feed heads, ensuring effective flocculation and sedimentation. The stirring component on the disinfection device ensures more thorough and uniform disinfection through stirring. The specific structures of the activated sludge treatment device, the flocculant addition device, and the disinfection device are simple, easy to install on the grid support plate, and the modular design facilitates installation and use.

[0006] According to some embodiments of the present invention, a sludge guiding slope is provided at the bottom of the sedimentation chamber, and a sludge guiding hole is provided on the side wall of the sedimentation chamber. The sludge guiding hole is connected to the sedimentation chamber and to a relatively low position of the sludge guiding slope. The sludge guiding hole is connected to a sludge pump and is connected to the activated sludge storage tank. The sludge pump is used to pump the sludge at the bottom of the sedimentation chamber to the activated sludge storage tank. The sludge pump enables the activated sludge to be fully utilized, and the sludge guiding slope enables sludge to accumulate, facilitating sludge intake and discharge.

[0007] According to some embodiments of the present invention, the grid support plate is detachably connected to the pool body, thereby enabling modular installation and disassembly of the entire grid support plate.

[0008] According to some embodiments of the present invention, the height of the activated sludge storage tank is higher than the height of the venturi tube, and the gravitational potential energy of the activated sludge storage tank can be used to add activated sludge.

[0009] According to some embodiments of the present invention, the distributing head includes a cavity shell and a turbine rotor. The turbine rotor is rotatably connected in the cavity shell. The cavity shell is cylindrical, and an L-shaped bend is connected to the outer circumference of the cavity shell. The bend is connected to the Venturi tube. A plurality of liquid outlet holes are formed on the peripheral wall of the cavity shell. The liquid outlet holes are evenly distributed around the circumference of the cavity shell and are connected to the cavity shell. The rotation axis of the turbine rotor is coaxial with the axis of the cavity shell. The distributing head has a simple structure, and the turbine rotor is used to distribute activated sludge more evenly.

[0010] According to some embodiments of the present invention, the parallel feeding head is configured as a cuboid shape, the length direction of the parallel feeding head extends along the width direction of the sedimentation chamber, the interior of the parallel feeding head is hollow, the upper end of the parallel feeding head is provided with a connecting hole, the connecting hole is used to connect to the feeding trough through the first solenoid valve, and the lower end of the parallel feeding head is provided with a plurality of leakage holes, the plurality of leakage holes being distributed along the length direction of the parallel feeding head.

[0011] According to some embodiments of the present invention, track locking holes are provided at both ends of the parallel feeding head, and track locking wheels are rotatably arranged in the track locking holes. A track is provided on the bracket, the track is used to pass through the track locking holes, and the track locking wheels are engaged with the track. The track restricts the sliding of the parallel feeding head and guides the parallel feeding head so that the parallel feeding head can uniformly add flocculant.

[0012] According to some embodiments of the present invention, the filtration device includes a mounting housing, in which a plurality of adjacent mounting slots are provided, each mounting slot being interconnected, the mounting slots being used to fill filter media, the upper end of the secondary filtration chamber being provided with a placement step, the mounting housing being disposed on the placement step, and the plurality of mounting slots being distributed from top to bottom, the filtration device having a simple structure and being convenient to install and use.

[0013] According to some embodiments of the present invention, the pool body is made of stainless steel, and the bottom of the pool body is provided with pulleys.

[0014] According to some embodiments of the present invention, the mesh support plate is detachably connected to the pool body.

[0015] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0017] Figure 1 This is a schematic diagram of the wastewater treatment tank according to an embodiment of the present invention from a top view angle;

[0018] Figure 2 for Figure 1 A schematic diagram of the activated sludge treatment device and flocculant addition device for a wastewater treatment pond is shown.

[0019] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0020] Figure 4 for Figure 1 A schematic diagram of the combined feed head of the flocculant addition device for a wastewater treatment pond is shown.

[0021] Figure 5 for Figure 1 A schematic diagram of the filtration and disinfection devices in the wastewater treatment tank is shown.

[0022] Figure 6 for Figure 1 A schematic diagram of the distribution head of the activated sludge treatment device in the wastewater treatment pond is shown.

[0023] Tank body 100, sewage flow channel 110, primary filtration chamber 111, activated sludge treatment chamber 112;

[0024] Sedimentation chamber 113, sludge guide slope 113a, sludge guide hole 113b, sludge pump 113c;

[0025] Secondary filtration chamber 114, placement step 114a;

[0026] Disinfection chamber 115, pulleys 120;

[0027] 200mm partition plate, 300mm mesh support plate;

[0028] Activated sludge treatment device 400, activated sludge storage tank 410, aeration pump 420;

[0029] Distributor head 430, cavity shell 431, turbine rotor 432, bend 433, liquid outlet 434;

[0030] Venturi tube 440;

[0031] Flocculant addition device 500, first water level detector 510, support 520, track 521;

[0032] 530, connected feeding head; 531, material leakage hole; 532, track clamping hole; 533, track clamping wheel; 534;

[0033] First solenoid valve 540, feeding chute 550, pump feeder 560;

[0034] Filter device 600, mounting housing 610, mounting groove 611;

[0035] Disinfection device 700, second water level detector 710, loading tank 720, second solenoid valve 730, stirring assembly 740. Detailed Implementation

[0036] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0037] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0038] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0039] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0040] Reference Figures 1 to 6A wastewater treatment tank includes a tank body 100, a baffle 200, a mesh support plate 300, an activated sludge treatment device 400, a flocculant addition device 500, a filtration device 600, and a disinfection device 700. The tank body 100 has a wastewater flow channel 110 arranged in a spiral shape. The end of the wastewater flow channel 110 furthest from the spiral center is designated as the inlet, and the end of the wastewater flow channel 110 closest to the spiral center is designated as the outlet. The baffle 200 is detachably installed within the wastewater flow channel 110, dividing the wastewater flow channel 110 into a primary filtration chamber 111, an activated sludge treatment chamber 112, a sedimentation chamber 113, a secondary filtration chamber 114, and a disinfection chamber 700. The activated sludge treatment device 400 comprises a primary filtration chamber 111, an activated sludge treatment chamber 112, a sedimentation chamber 113, a secondary filtration chamber 114, and a disinfection chamber 115 arranged in a stepped manner. A grid support plate 300 is connected to the tank body 100 and is positioned above the wastewater flow channel 110. The activated sludge treatment device 400 includes an activated sludge storage tank 410, an aeration pump 420, and a distribution head 430. Several distribution heads 430 are provided, and each distribution head 430 is connected to the air outlet of the aeration pump 420 through a Venturi tube 440. The distribution heads 430 are evenly distributed along the path of the activated sludge treatment chamber 112. The activated sludge storage tank 410 is connected to the Venturi tube 440. At the narrowing point of section 40, the activated sludge storage tank 410, aeration pump 420, and distribution head 430 are all mounted on the grid support plate 300. The flocculant addition device 500 includes a first water level detector 510, a support 520, a series of feed heads 530, a first solenoid valve 540, and a discharge trough 550. The first water level detector 510 is mounted on the inner wall of the sedimentation chamber 113 and is used to detect the water level in the sedimentation chamber 113. The support 520 is detachably connected to the grid support plate 300. The discharge trough 550 is connected to the support 520 and is used to load flocculant. The series of feed heads 530 are slidably mounted along the path of the sedimentation chamber 113. Mounted on bracket 520, the row of feed heads 530 is connected to the discharge trough 550 via a first solenoid valve 540. A pump 560 is connected to the pipeline between the first solenoid valve 540 and the discharge trough 550. The first solenoid valve 540 is electrically connected to a first water level detector 510, which is used to detect the water level in the sedimentation chamber 113 to control the opening and closing of the first solenoid valve 540. The pump 560 is used to pump the flocculant from the discharge trough 550 into the row of feed heads 530, which is used to add flocculant to the sedimentation chamber 113. A filter device 600 is mounted on the upper end of the secondary filter chamber 114 and is used to filter the water discharged from the sedimentation chamber 113.The disinfection device 700 includes a second water level detector 710, a loading tank 720, a second solenoid valve 730, and a stirring assembly 740. The second water level detector 710 is disposed on the inner wall of the disinfection chamber 115. The loading tank 720 and the stirring assembly 740 are both disposed on the grid support plate 300. The stirring head of the stirring assembly 740 extends into the disinfection chamber 115. The loading tank 720 is connected to the second solenoid valve 730 via a flexible hose. The second water level detector 710 is electrically connected to the second solenoid valve 730. The second water level detector 710 is used to detect the water level to control the opening and closing of the second solenoid valve 730. The stirring assembly 740 is used to stir the water in the disinfection chamber 115.

[0041] It should be understood that the set pool 100 integrates the activated sludge treatment device 400, flocculant addition device 500, filtration device 600, and disinfection device 700 together. The spiral sewage flow channel 110 achieves the purpose of centralized installation of each device, thereby reducing the footprint of the entire sewage treatment pool. The set activated sludge treatment device 400 can add activated sludge to the sewage through the Venturi effect, and can aerate while adding activated sludge, increasing the sewage treatment speed. The set flocculant addition device 500 achieves uniform feeding through the sliding of the row of feed heads 530, ensuring the sewage flocculation effect, thereby ensuring the sedimentation effect. The stirring component 740 on the disinfection device 700 makes the disinfection more thorough and uniform through stirring. The specific structure of the activated sludge treatment device 400, flocculant addition device 500, and disinfection device 700 is simple and easy to install on the grid support plate 300. The modular design facilitates installation and use.

[0042] It should be noted that the pool body 100 is movable and can be directly built on the bottom surface or below the ground. The grid support plate 300 is a support plate covering the pool body 100, which can be used to prevent personnel from accidentally falling into the pool body 100 and to provide support for various devices. The so-called grid support plate 300 refers to a support plate with grid through holes. It can also be replaced with a completely closed plate as needed. The activated sludge treatment device 400 mainly adds activated sludge to organic wastewater for biodegradation. It mainly uses aerobic bacteria to degrade organic matter in organic wastewater, thereby cultivating more aerobic bacteria and increasing the activated sludge for recycling. The partition 200 is detachable and can be opened or closed as needed. Since the various chambers in this application are set in a stepped form, the partition 200 is preferably a closed partition to separate two adjacent chambers.

[0043] Understandably, the primary filtration chamber 111 is equipped with a screen to filter out large debris in the wastewater, ensuring smooth subsequent treatment. The feed head 530 is designed to evenly distribute the flocculant on the wastewater surface for better flocculation. The pump feeder 560 can be a regular pump or a vibrating conveyor. The electrical connection between the water level detector and the solenoid valve is a conventional connection, designed to open the solenoid valve when the water level reaches a predetermined position, allowing the corresponding material to be added. The loading tank 720 is used to load disinfectant or disinfectant solid particles.

[0044] In some embodiments, the disinfection device 700 may also be an ultraviolet lamp device that disinfects water by light irradiation, and the disinfected water is discharged through a pump or siphon.

[0045] Reference Figure 2 The sedimentation chamber 113 has a sludge guiding slope 113a at its bottom and a sludge guiding hole 113b on its side wall. The sludge guiding hole 113b connects to the sedimentation chamber 113 and to a relatively low position on the sludge guiding slope 113a. The sludge guiding hole 113b connects to a sludge pump 113c, which in turn connects to an activated sludge storage tank 410. The sludge pump 113c is used to pump the sludge at the bottom of the sedimentation chamber 113 to the activated sludge storage tank 410. The sludge pump 113c allows the activated sludge to be fully utilized, and the sludge guiding slope 113a facilitates sludge collection and discharge.

[0046] In some embodiments, the grid support plate 300 is detachably connected to the pool body 100, enabling modular installation and disassembly of the entire grid support plate 300.

[0047] In some embodiments, the height of the activated sludge storage tank 410 is higher than the height of the venturi tube 440, and the gravitational potential energy of the activated sludge storage tank 410 can be used to add activated sludge.

[0048] Reference Figure 1 and Figure 6The distribution head 430 includes a cavity housing 431 and a turbine rotor 432. The turbine rotor 432 is rotatably connected in the cavity housing 431. The cavity housing 431 is cylindrical, and an L-shaped bend 433 is connected to the outer circumference of the cavity housing 431. The bend 433 is connected to a Venturi tube 440. Several liquid outlet holes 434 are opened on the peripheral wall of the cavity housing 431. The liquid outlet holes 434 are evenly distributed around the circumference of the cavity housing 431 and are connected to the cavity housing 431. The rotating shaft of the sub-head 432 is coaxially set with the axis of the cavity shell 431. The structure of the distribution head 430 is simple. The turbine rotor 432 is used to distribute the activated sludge, and the distribution is more uniform. It can be understood that after the pressurized fluid enters the cavity shell 431, it acts on the turbine rotor 432. The turbine rotor 432 can rotate and throw the fluid out from the liquid outlet 434. Because the distribution head 430 is submerged in water, it can play both the role of aeration and the role of distributing activated sludge.

[0049] Reference Figure 2 and Figure 4 The feed head 530 is configured as a cuboid shape, and its length extends along the width of the sedimentation chamber 113. The interior of the feed head 530 is hollow. The upper end of the feed head 530 is provided with a connecting hole 531, which is used to connect to the feed trough 550 through the first solenoid valve 540. The lower end of the feed head 530 is provided with a number of leakage holes 532, which are distributed along the length of the feed head 530.

[0050] In some embodiments, the two ends of the feed head 530 are provided with track locking holes 533, and track locking wheels 534 are rotatably provided in the track locking holes 533. The bracket 520 is provided with a track 521, which is used to pass through the track locking holes 533. The track locking wheels 534 are engaged with the track 521. The track 521 restricts the sliding of the feed head 530 and guides the feed head 530 so that the feed head 530 can add flocculant evenly.

[0051] Reference Figure 5 The filter device 600 includes a mounting housing 610, in which several adjacent mounting slots 611 are provided. Each mounting slot 611 is connected and used to fill filter media. The upper end of the secondary filtration chamber 114 is provided with a placement step 114a. The mounting housing 610 is placed on the placement step 114a. The several mounting slots 611 are distributed from top to bottom. The filter device 600 has a simple structure and is easy to install and use. It is understood that the filter media include sand, cotton cloth, asbestos, activated carbon, etc.

[0052] In some embodiments, the pool body 100 is made of stainless steel, and the bottom of the pool body 100 is provided with pulleys 120.

[0053] In some embodiments, the mesh support plate 300 is detachably connected to the pool body 100.

[0054] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A sewage treatment tank, characterized in that, include: The pool body (100) has a sewage flow channel (110) inside. The sewage flow channel (110) is spiral-shaped. The end of the sewage flow channel (110) away from the center of the spiral is the inlet end, and the end of the sewage flow channel (110) close to the center of the spiral is the outlet end. A partition (200) is detachably disposed within the sewage flow channel (110). The partition (200) divides the sewage flow channel (110) into a primary filtration chamber (111), an activated sludge treatment chamber (112), a sedimentation chamber (113), a secondary filtration chamber (114), and a disinfection chamber (115). The primary filtration chamber (111), the activated sludge treatment chamber (112), the sedimentation chamber (113), the secondary filtration chamber (114), and the disinfection chamber (115) are arranged in a stepped manner. A grid support plate (300) is connected to the pool body (100), and the grid support plate (300) is disposed above the sewage flow channel (110); An activated sludge treatment device (400) includes an activated sludge storage tank (410), an aeration pump (420), and distribution heads (430). Several distribution heads (430) are provided, each connected to the air outlet of the aeration pump (420) via a Venturi tube (440). The distribution heads (430) are evenly distributed along the path of the activated sludge treatment chamber (112). The activated sludge storage tank (410) is connected to the narrowing point of the Venturi tube (440). Both the activated sludge storage tank (410) and the aeration pump (420) are mounted on the grid support plate (300). Each distribution head (430) includes a hollow shell. (431) and turbine rotor (432), the turbine rotor (432) is rotatably connected in the cavity housing (431), the cavity housing (431) is cylindrical, the outer circumference of the cavity housing (431) is connected to an L-shaped bend (433), the bend (433) is connected to the Venturi tube (440), a plurality of liquid outlet holes (434) are opened on the peripheral wall of the cavity housing (431), the liquid outlet holes (434) are evenly distributed around the circumference of the cavity housing (431), the liquid outlet holes (434) are connected to the cavity housing (431), and the rotation axis of the turbine rotor (432) is coaxial with the axis of the cavity housing (431); The flocculant addition device (500) includes a first water level detector (510), a support (520), a series of feed heads (530), a first solenoid valve (540), and a discharge trough (550). The first water level detector (510) is disposed on the inner wall of the sedimentation chamber (113) and is used to detect the water level in the sedimentation chamber (113). The support (520) is detachably connected to the grid support plate (300). The discharge trough (550) is connected to the support (520) and is used to load flocculant. The series of feed heads (530) are slidably disposed along the path extension direction of the sedimentation chamber (113). On the support (520), the row of feed heads (530) is connected to the discharge trough (550) through the first solenoid valve (540). A pump (560) is connected to the pipeline between the first solenoid valve (540) and the discharge trough (550). The first solenoid valve (540) is electrically connected to the first water level detector (510). The first water level detector (510) is used to detect the water level in the sedimentation chamber (113) to control the opening and closing of the first solenoid valve (540). The pump (560) is used to pump the flocculant in the discharge trough (550) into the row of feed heads (530). The row of feed heads (530) is used to add flocculant to the sedimentation chamber (113). A filter device (600) is installed at the upper end of the secondary filter chamber (114), and the filter device (600) is used to filter the water discharged from the sedimentation chamber (113); The disinfection device (700) includes a second water level detector (710), a loading tank (720), a second solenoid valve (730), and a stirring assembly (740). The second water level detector (710) is disposed on the inner wall of the disinfection chamber (115). The loading tank (720) and the stirring assembly (740) are both disposed on the grid support plate (300). The stirring head of the stirring assembly (740) extends into the disinfection chamber (115). The loading tank (720) is connected to the second solenoid valve (730) through a hose. The second water level detector (710) is electrically connected to the second solenoid valve (730). The second water level detector (710) is used to detect the water level to control the opening and closing of the second solenoid valve (730). The stirring assembly (740) is used to stir the water in the disinfection chamber (115).

2. The sewage treatment tank according to claim 1, characterized in that: The bottom of the sedimentation chamber (113) is provided with a sludge guiding slope (113a), and the side wall of the sedimentation chamber (113) is provided with a sludge guiding hole (113b). The sludge guiding hole (113b) is connected to the sedimentation chamber (113) and is connected to a relatively low position of the sludge guiding slope (113a). The sludge guiding hole (113b) is connected to a sludge pump (113c), and the sludge pump (113c) is connected to the activated sludge storage tank (410). The sludge pump (113c) is used to pump the sludge at the bottom of the sedimentation chamber (113) to the activated sludge storage tank (410).

3. The sewage treatment tank according to claim 2, characterized in that: The grid support plate (300) is detachably connected to the pool body (100).

4. The sewage treatment tank according to claim 3, characterized in that: The height of the activated sludge storage tank (410) is higher than the height of the venturi tube (440).

5. The wastewater treatment tank according to any one of claims 1-4, characterized in that: The feed head (530) is configured as a cuboid shape. The length of the feed head (530) extends along the width of the sedimentation chamber (113). The interior of the feed head (530) is hollow. The upper end of the feed head (530) is provided with a connecting hole (531). The connecting hole (531) is used to connect to the discharge trough (550) through the first solenoid valve (540). The lower end of the feed head (530) is provided with a plurality of leakage holes (532). The plurality of leakage holes (532) are distributed along the length of the feed head (530).

6. The sewage treatment tank according to claim 5, characterized in that: The two ends of the feed head (530) are provided with track holes (533), and track rollers (534) are rotatably provided in the track holes (533). The bracket (520) is provided with a track (521), which is used to pass through the track holes (533), and the track rollers (534) are engaged with the track (521).

7. The sewage treatment tank according to claim 1, characterized in that: The filter device (600) includes a mounting housing (610) with a plurality of adjacent mounting slots (611) arranged in the mounting housing (610). Each mounting slot (611) is connected and is used to fill the filter medium. The upper end of the secondary filter chamber (114) is provided with a placement step (114a). The mounting housing (610) is arranged on the placement step (114a). The plurality of mounting slots (611) are distributed from top to bottom.

8. The sewage treatment tank according to claim 1, characterized in that: The pool body (100) is made of stainless steel, and the bottom of the pool body (100) is provided with pulleys (120).

9. The sewage treatment tank according to claim 1, characterized in that: The grid support plate (300) is detachably connected to the pool body (100).

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