Efficient activated sludge separator

Abstract

The utility model relates to the technical field of sewage treatment, in particular to an efficient activated sludge separator which structurally comprises a tank body, a biochemical aeration tank, a sedimentation tank and a clean water tank are sequentially arranged in the tank body along the flow direction of sewage treatment, and a sludge separator is fixed on one side, connected with the sedimentation tank, of the biochemical aeration tank; the sludge separator comprises a topless box body, the topless box body is provided with a back plate close to one side of the sedimentation tank, a front plate opposite to the back plate, and two side plates respectively used for connecting the back plate and the front plate, and the bottom of the front plate is provided with a bottom plate extending towards the back plate. Therefore, sludge in the sewage is pre-separated through the sludge separator, most of the sludge in the sewage is settled back to the biochemical aeration tank, the sludge content of the sewage in the settling tank is reduced, the volume of the settling tank can be reduced, the condition that the sludge in the settling tank floats upwards is avoided, and the effluent quality of sewage treatment is ensured to reach the standard.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a high-efficiency activated sludge separator. Background Art

[0002] Sewage treatment is a process of purifying sewage to meet the water quality requirements for discharging it into a certain water body or reusing it; sewage treatment is widely used in various fields such as construction, agriculture, transportation, energy, petrochemical, environmental protection, urban landscape, medical treatment, catering, etc., and is also increasingly entering the daily life of ordinary people.

[0003] In a patent document with the patent number: CN218931843U, an integrated sewage treatment device is disclosed, including a chassis. A hydrolysis acidification tank, a first denitrification tank, a first nitrification tank, a second denitrification tank, a second nitrification tank, a sedimentation tank, and a clear water tank are arranged in the chassis. An MBR membrane group is arranged in the sedimentation tank, and three agitators are installed in the hydrolysis acidification tank.

[0004] However, it still has the following deficiencies in the actual application process: In the existing sewage treatment system, sewage is degraded in a biochemical tank, and then the treated sewage is introduced into a sedimentation tank. In the sedimentation tank, most of the sludge will settle to the bottom of the tank, so a sedimentation tank with a large volume is required; moreover, with the increase in summer temperature, the sedimentation performance of activated sludge will significantly decline, resulting in a slower sedimentation rate. At the same time, the high temperature promotes the acceleration of the metabolic activities of microorganisms, increasing the oxygen consumption, which may cause anaerobic conditions or denitrification reactions in the sedimentation tank, thereby generating gas, causing the sludge to float, resulting in an increase in the concentration of suspended solids (SS) in the effluent, and in severe cases, it may lead to the exceeding of the effluent water quality standard. Content of the Utility Model

[0005] The utility model provides a high-efficiency activated sludge separator, which can effectively solve the above problems.

[0006] The utility model is realized as follows:

[0007] An efficient activated sludge separator, the structure of which includes: a tank body, inside which there are sequentially arranged a biochemical aeration tank, a sedimentation tank, and a clear water tank along the sewage treatment flow direction, and a sludge separator is fixed on one side of the biochemical aeration tank connected to the sedimentation tank; the sludge separator includes a topless box body, the topless box body has a back plate on the side close to the sedimentation tank, a front plate arranged opposite to the back plate, and two side plates respectively used to connect the back plate and the front plate. The bottom of the front plate is provided with a bottom plate extending towards the back plate. An inlet for sewage to enter the topless box body is arranged between the bottom plate and the back plate. The bottom plate is provided with a first baffle extending obliquely towards the back plate. The back plate is provided with a second baffle extending obliquely towards the front plate. The second baffle is above the first baffle. A gap for sewage to pass through is respectively formed between the first baffle and the back plate, and between the second baffle and the front plate. The top of the topless box body is provided with an overflow plate connected between the two side plates and connected to the back plate at the bottom. A collection tank is formed between the overflow plate and the side plates and the back plate. A connecting pipe is arranged on the back plate, and both ends of the connecting pipe are respectively communicated with the collection tank and the sedimentation tank.

[0008] As a further improvement, the bottom plate is arranged to slope downwards.

[0009] As a further improvement, a sand removal baffle connected between the two side plates is further arranged at the top of the topless box body. The sand removal baffle is on the left side of the overflow plate, and a diversion channel for sewage to enter the collection tank is arranged between the sand removal baffle and the overflow plate. The top of the sand removal baffle is 2 cm higher than the top of the topless box body.

[0010] As a further improvement, a number of exhaust holes are arranged on the first baffle, and the exhaust holes are arranged at the root of the first baffle.

[0011] As a further improvement, the included angle between the first baffle and the bottom plate is 45° - 60°.

[0012] As a further improvement, the included angle between the second baffle and the back plate is 45°.

[0013] The beneficial effects of the present utility model are:

[0014] By providing a sludge separator, the present utility model pre-separates and treats the sludge in the sewage through the sludge separator, so that most of the sludge in the sewage precipitates and returns to the biochemical aeration tank, reducing the sludge content in the sewage in the sedimentation tank, thereby enabling the volume of the sedimentation tank to be reduced, and at the same time avoiding the situation of sludge floating in the sedimentation tank, ensuring that the effluent quality of sewage treatment meets the standards. Description of the Drawings

[0015] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other relevant drawings can also be obtained based on these drawings.

[0016] Figure 1 is a schematic structural diagram of an efficient activated sludge separator provided by the present utility model;

[0017] Figure 2 is a schematic structural diagram of the cross-section of the tank body provided by the present utility model;

[0018] Figure 3 is a schematic structural diagram of the cross-section of the sludge separator provided by the present utility model;

[0019] Figure 4 is a schematic structural diagram of the cross-section of the sludge separator provided by the present utility model;

[0020] Figure 5 is a schematic diagram of the flow state of sewage in the sludge separator provided by the present utility model.

[0021] In the figure: tank body - 1, biochemical aeration tank - 11, sedimentation tank - 12, clear water tank - 13, sludge separator - 2, roofless box body - 21, back plate - 211, front plate - 212, bottom plate - 213, water inlet - 22, first baffle - 23, second baffle - 24, overflow plate - 25, connecting pipe - 26, sand removal baffle - 27. Specific embodiments

[0022] To enable the embodiments of the present utility model, they all fall within the scope of protection of the present utility model. Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but merely represents the selected embodiments of the present utility model. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model.

[0023] In the description of the present utility model, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more, unless otherwise specifically defined. For a clearer understanding of the objectives, technical solutions, and advantages of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of the present utility model.

[0024] The existing sewage treatment system degrades sewage through a biochemical tank, and then introduces the treated sewage into a sedimentation tank. In the sedimentation tank, most of the sludge will settle to the bottom of the tank, so a sedimentation tank with a large volume is required. Moreover, with the increase in summer temperature, the sedimentation performance of the activated sludge in the sedimentation tank will decrease significantly, resulting in a slower sedimentation rate. At the same time, the high temperature promotes the acceleration of the metabolic activities of microorganisms, increasing the oxygen consumption, which may cause anaerobic conditions or denitrification reactions in the sedimentation tank, thereby generating gas, causing the sludge to float, increasing the concentration of suspended solids (SS) in the effluent, and seriously may lead to the exceeding of the effluent water quality standard. To solve the above technical problems, the following technical solutions are proposed in this case:

[0025] Refer to Figures 1 to 5As shown in the figure, an efficient activated sludge separator has a structure including: a tank body 1. Inside the tank body 1, a biochemical aeration tank 11, a sedimentation tank 12, and a clear water tank 13 are sequentially arranged along the sewage treatment flow direction. A sludge separator 2 is fixed on one side where the biochemical aeration tank 11 is connected to the sedimentation tank 12. The sludge separator 2 includes a roofless box body 21. The roofless box body 21 has a back plate 211 on the side close to the sedimentation tank 12, a front plate 212 arranged opposite to the back plate 211, and two side plates respectively used to connect the back plate 211 and the front plate 212. At the bottom of the front plate 212, a bottom plate 213 extending towards the back plate 211 is provided. An inlet 22 for sewage to enter the roofless box body 21 is arranged between the bottom plate 213 and the back plate 211. A first baffle 23 inclinedly extending towards the back plate 211 is provided on the bottom plate 213. A second baffle 24 inclinedly extending towards the front plate 212 is provided on the back plate 211. The second baffle 24 is above the first baffle 23. Gaps for sewage to pass through are respectively formed between the first baffle 23 and the back plate 211, and between the second baffle 24 and the front plate 212. At the top of the roofless box body 21, an overflow plate 25 is connected between the two side plates and is connected to the back plate 211 at the bottom. A collection tank is formed between the overflow plate 25, the side plates, and the back plate 211. A connecting pipe 26 is provided on the back plate 211. Both ends of the connecting pipe 26 are respectively communicated with the collection tank and the sedimentation tank 12.

[0026] Therefore, after the sewage is treated by the biochemical aeration tank 11, the sewage overflows and is connected to the bottom of the sedimentation tank 12. The supernatant liquid in the upper part of the sedimentation tank 12 overflows into the clear water tank 13. When the sewage overflows into the sedimentation tank 12 after being treated by the biochemical aeration tank 11, the sewage containing sludge is pre-separated by the sludge separator 2. The specific operation is as follows: The sewage enters from the inlet 22 at the bottom of the roofless box body 21. First, the primary separation of sludge is achieved through the first baffle 23. The sludge sinks under the action of gravity. The sewage after the primary separation continues to flow upward through the gap between the first baffle 23 and the back plate 211, and then the secondary separation of sludge is achieved through the second baffle 24. The sludge also sinks under the action of gravity. The sewage after the secondary separation continues to flow upward through the gap between the second baffle 24 and the front plate 212. The top of the overflow plate 25 is lower than the top of the roofless box body 21. Therefore, the sewage overflows into the collection tank through the overflow plate 25 and finally is discharged into the sedimentation tank 12 through the connecting pipe 26. Therefore, the sludge in the sewage can be pre-separated by the sludge separator 2, so that most of the sludge in the sewage precipitates back into the biochemical aeration tank 11, reducing the sludge content in the sewage in the sedimentation tank, thereby reducing the volume of the sedimentation tank and avoiding the situation of sludge floating in the sedimentation tank, ensuring that the effluent quality of the sewage treatment meets the standards.

[0027] Wherein, both sides of the first baffle 23 and the second baffle 24 are respectively connected to the two side plates to optimize the separation effect of the sludge to the maximum extent.

[0028] The above overflow plate 25 is of an L-shaped structure, and a triangular water outlet weir is provided at the top to ensure that the clarified liquid separated at the top can uniformly flow into the collection tank.

[0029] Moreover, the bottom plate 213 is inclined downward, so that when the sewage enters the roofless box body 21 after being treated in the biochemical aeration tank 11, it plays a guiding role. At the same time, to a certain extent, the sludge separated by the first baffle 23 can sink along the bottom plate 213 and return to the biochemical aeration tank 11.

[0030] Furthermore, a sand removal baffle 27 connected between the two side plates is also provided at the top of the roofless box body 21. The sand removal baffle 27 is located on the left side of the overflow plate 25, and a diversion channel for the sewage to enter the collection tank is provided between the sand removal baffle 27 and the overflow plate 25. The top of the sand removal baffle 27 is 2 cm higher than the top of the roofless box body 21. Therefore, when the sewage flows upward through the notch between the second baffle 24 and the front plate 212, the sand removal baffle 27 separates the sludge again, prompting the clarified liquid to overflow through the gap between the sand removal baffle 27 and the overflow plate 25 and enter the interior of the collection tank, further improving the sludge separation treatment effect.

[0031] At the same time, a number of exhaust holes 231 are provided on the first baffle 23. The exhaust holes 231 are arranged at the root of the first baffle 23, facilitating the upward discharge of the aeration generated in the biochemical aeration tank 11 through the exhaust holes 231, avoiding the upward release of the separated sludge driven by the aeration, and further improving the sludge separation treatment effect in the sewage.

[0032] The included angle between the first baffle 23 and the bottom plate 213 is 45°-60°, and the included angle between the second baffle 24 and the back plate 211 is 45°, which helps to optimize the sedimentation and flow of the sludge, ensure that the solid particles in the sewage can be effectively separated and deposited, and further improve the overall treatment effect.

[0033] The above is only the preferred embodiment of the present invention and is not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An efficient activated sludge separator, the structure of which includes: Tank body (1), inside which there are successively arranged a biochemical aeration tank (11), a sedimentation tank (12), and a clear water tank (13) along the sewage treatment flow direction. It is characterized in that: on one side where the biochemical aeration tank (11) is connected to the sedimentation tank (12), a sludge separator (2) is fixed; the sludge separator (2) includes a roofless box body (21), the roofless box body (21) has a back plate (211) on the side close to the sedimentation tank (12), a front plate (212) arranged opposite to the back plate (211), and two side plates respectively used to connect the back plate (211) and the front plate (212). At the bottom of the front plate (212), there is a bottom plate (213) extending towards the back plate (211). Between the bottom plate (213) and the back plate (211), there is a water inlet (22) for sewage to enter the roofless box body (21). On the bottom plate (213), there is a first baffle (23) extending obliquely towards the back plate (211). On the back plate (211), there is a second baffle (24) extending obliquely towards the front plate (212). The second baffle (24) is above the first baffle (23). Between the first baffle (23) and the back plate (211), and between the second baffle (24) and the front plate (212), there are respectively formed gaps for sewage to pass through. At the top of the roofless box body (21), there is an overflow plate (25) connected between the two side plates and having its bottom connected to the back plate (211). Between the overflow plate (25) and the side plates and the back plate (211), a collection tank is formed. On the back plate (211), there is a connecting pipe (26), and both ends of the connecting pipe (26) are communicated with the collection tank and the sedimentation tank (12).

2. The high-efficiency activated sludge separator according to claim 1, wherein: The bottom plate (213) is arranged to be inclined downwards.

3. An efficient activated sludge separator according to claim 2, characterized in that: At the top of the roofless box body (21), there is also a sand removal baffle (27) connected between the two side plates. The sand removal baffle (27) is on the left side of the overflow plate (25), and between the sand removal baffle (27) and the overflow plate (25), there is a diversion channel for sewage to enter the collection tank. The top of the sand removal baffle (27) is 2 cm higher than the top of the roofless box body (21).

4. An efficient activated sludge separator according to any one of claims 1 to 3, characterized in that: On the first baffle (23), there are a number of exhaust holes (231), and the exhaust holes (231) are arranged at the root of the first baffle (23).

5. An efficient activated sludge separator according to claim 4, characterized in that: The included angle between the first baffle (23) and the bottom plate (213) is 45° - 60°.

6. The high-efficiency activated sludge separator according to claim 5, characterized in that: The included angle between the second baffle (24) and the back plate (211) is 45°.

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