A sludge return selector

Abstract

This utility model discloses a sludge return selector, including a selector assembly and a dosing tank assembly. A frame assembly is provided at the bottom of both the selector assembly and the dosing tank assembly. The selector assembly includes a vertical cylindrical body, with a sludge inlet pipe and a reflector plate on its inner wall. A conical hopper is located at the bottom of the vertical cylindrical body. In this sludge return selector, a 10% NaCl solution is added to the vertical cylindrical body at a volume ratio of 1:10, and the sludge is mixed to achieve a final salt concentration of approximately 0.9% and a density of approximately 1.03 ± 0.01 g / cm³. 3 The average retention time of the returned sludge is 5 minutes to achieve full stratification. The density difference between sludge components is used to achieve stratified sedimentation. Highly active microorganisms are selectively returned to the biological treatment tank, and the rest are discharged from the system. The device has a simple structure, strong adaptability, and good operating economy.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment and resource utilization, specifically to a sludge return selector. Background Technology

[0002] In biological wastewater treatment systems, the quality of returned sludge directly affects the microbial community structure and treatment efficiency. In existing technologies, due to the complex sources of wastewater, returned sludge often contains a large amount of low-density aged sludge and high-density inorganic particles. These components not only have low activity but also dilute the effective biomass in the system. To maintain treatment efficiency, treatment plants have to increase sludge concentration, leading to increased energy consumption and operating costs. Existing return systems generally lack effective screening and enrichment mechanisms for sludge components. Utility Model Content

[0003] In view of the problems in the related technologies, this utility model proposes a sludge return selector to overcome the above-mentioned technical problems existing in the existing related technologies.

[0004] Therefore, the specific technical solution adopted by this utility model is as follows: a sludge return selector, including a selector assembly and a dosing tank assembly, wherein a frame assembly is provided at the bottom of the selector assembly and the dosing tank assembly; The selector assembly includes a vertical cylindrical body, an inlet pipe on the inner wall of the vertical cylindrical body, a reflector plate on the inner wall of the vertical cylindrical body, a conical hopper bottom at the bottom of the vertical cylindrical body, a first mud outlet on the middle side of the outer wall of the vertical cylindrical body, a second mud outlet on the lower side of the outer wall of the vertical cylindrical body, and a third mud outlet at the bottom of the conical hopper.

[0005] Preferably, the medicine dispensing box assembly includes an upper support fixedly mounted on the frame assembly, the top of the upper support is fixedly connected to the medicine dispensing box, the output end of the medicine dispensing box is provided with a drain pipe, and the drain pipe is provided with a control valve near the connection point of the medicine dispensing box.

[0006] Preferably, the dosing tank contains a 10% NaCl solution.

[0007] Preferably, the vertical cylindrical body is a stainless steel vertical cylindrical body.

[0008] Preferably, the reflector is a downward-facing conical reflector.

[0009] Preferably, the platform assembly includes a platform plate and four support column mechanisms, and the four support column mechanisms are symmetrically arranged at the bottom of the platform plate.

[0010] Preferably, the support column mechanism includes an upper tray fixedly installed at the bottom of the platform plate, a lifting hydraulic cylinder fixedly connected to the bottom of the upper tray, and an anti-slip chassis fixedly connected to the bottom of the lifting hydraulic cylinder.

[0011] Preferably, the top of the platform plate is provided with a slot, and the bottom of the conical bucket is engaged with the inner wall of the slot.

[0012] The beneficial effects of this utility model are as follows: 1. In this sludge return selector, a 10% NaCl solution is added to the vertical cylindrical body at a volume ratio of 1:10, and the sludge is mixed with it to achieve a final salt concentration of approximately 0.9% and a density of approximately 1.03 ± 0.01 g / cm³. 3 The average retention time of the returned sludge is 5 minutes to achieve full stratification. The density difference between sludge components is used to achieve stratified sedimentation. Highly active microorganisms are selectively returned to the biological treatment tank, and the rest are discharged from the system. The device has a simple structure, strong adaptability, and good operating economy.

[0013] 2. This sludge return selector, through the setting of the platform assembly, can be used by starting and controlling the support column mechanism to adjust the height of the platform plate, so as to clean and maintain the selector assembly from the bottom, so as to maintain the performance of the device. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is the front view of the present utility model; Figure 2 This is a schematic diagram of the external structure of the selector assembly of this utility model; Figure 3 This is a schematic diagram of the internal structure of the selector assembly of this utility model; Figure 4 This is a schematic diagram of the structure of the medicine dispensing box assembly of this utility model; Figure 5 This is a schematic diagram of the structure of the platform assembly of this utility model; Figure 6 This is a schematic diagram of the support column mechanism of this utility model.

[0016] In the diagram: 1. Frame assembly; 101. Frame plate; 102. Support column mechanism; 1021. Upper tray; 1022. Lifting hydraulic cylinder; 1023. Anti-slip chassis; 103. Slot; 2. Selector assembly; 201. Vertical cylindrical body; 202. Mud inlet pipe; 203. Conical hopper bottom; 204. First mud outlet; 205. Second mud outlet; 206. Third mud outlet; 207. Reflector plate; 3. Dosing tank assembly; 301. Dosing tank; 302. Drain pipe; 303. Upper support. Detailed Implementation

[0017] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0018] According to an embodiment of the present invention, a sludge return selector is provided.

[0019] Example 1; like Figures 1-6 As shown, the reflux sludge selector according to an embodiment of the present utility model includes a selector assembly 2 and a dosing tank assembly 3, and a frame assembly 1 is provided at the bottom of the selector assembly 2 and the dosing tank assembly 3. Selector assembly 2 includes a vertical cylindrical body 201, an inlet pipe 202 on the inner wall of the vertical cylindrical body 201, a reflector plate 207 on the inner wall of the vertical cylindrical body 201, a conical hopper bottom 203 at the bottom of the vertical cylindrical body 201, a first mud outlet 204 on the middle side of the outer wall of the vertical cylindrical body 201, a second mud outlet 205 on the lower side of the outer wall of the vertical cylindrical body 201, and a third mud outlet 206 at the bottom of the conical hopper bottom 203. The medicine dispensing box assembly 3 includes an upper support 303 fixedly mounted on the frame assembly 1. The top of the upper support 303 is fixedly connected to the medicine dispensing box 301. The output end of the medicine dispensing box 301 is provided with a drain pipe 302, and the drain pipe 302 is provided with a control valve near the connection point of the medicine dispensing box 301. The dosing tank 301 contains a 10% NaCl solution; The vertical cylindrical body 201 is made of stainless steel. The reflector 207 is a downward-facing conical reflector.

[0020] In this embodiment, a 10% NaCl solution from the dosing tank 301 is added to the vertical cylindrical body 201 at a volume ratio of 10% NaCl solution and recycled sludge, resulting in a final salt concentration of approximately 0.9% and a density of approximately 1.03 ± 0.01 g / cm³. 3 The average retention time of the returned sludge is 5 minutes to achieve full stratification. The density difference between sludge components is used to achieve stratified sedimentation. Highly active microorganisms are selectively returned to the biological treatment tank, and the rest are discharged from the system. The device has a simple structure, strong adaptability, and good operating economy.

[0021] Example 2; Based on Embodiment 1, a preferred embodiment of the reflux sludge selector provided by this utility model is, for example... Figures 1-6 As shown: The test bench assembly 1 includes a test bench plate 101 and four support column mechanisms 102, and the four support column mechanisms 102 are symmetrically arranged at the bottom of the test bench plate 101; The support column mechanism 102 includes an upper tray 1021 fixedly installed at the bottom of the platform plate 101, a lifting hydraulic cylinder 1022 fixedly connected to the bottom of the upper tray 1021, and an anti-slip chassis 1023 fixedly connected to the bottom of the lifting hydraulic cylinder 1022. The top of the platform plate 101 is provided with a slot 103, and the bottom of the conical bucket bottom 203 is engaged with the inner wall of the slot 103.

[0022] In this embodiment, by setting up the platform assembly 1, the height of the platform plate 101 and the selector assembly 2 can be adjusted by starting and controlling the support column mechanism 102 during use, so as to clean and maintain the selector assembly 2 from the bottom, so as to maintain the performance of the device.

[0023] To facilitate understanding of the above-mentioned technical solutions of this utility model, the working principle or operation method of this utility model in actual process will be described in detail below.

[0024] In practical applications, a 10% NaCl solution from the dosing tank 301 is added to the vertical cylindrical body 201 at a volume ratio of 10% NaCl solution and returned sludge, resulting in a final salt concentration of approximately 0.9% and a density of approximately 1.03 ± 0.01 g / cm³. 3 The average retention time of the returned sludge is 5 minutes to achieve full stratification. The density difference between sludge components is used to achieve stratified sedimentation. Highly active microorganisms are returned to the biological treatment tank through the second sludge outlet 205. Low-density aged sludge is discharged to the sludge thickening tank through the first sludge outlet 204. High-density inorganic particles are discharged to the sludge thickening tank through the first sludge outlet 204.

[0025] In summary, using the above-described technical solution of this utility model, the return sludge selector mixes a 10% NaCl solution from the dosing tank 301 with the return sludge in a 1:10 volume ratio added to the vertical cylindrical body 201, resulting in a final salt concentration of approximately 0.9% and a density of approximately 1.03 ± 0.01 g / cm³. 3 The average retention time of the returned sludge is 5 minutes to achieve full stratification. The density difference between sludge components is used to achieve stratified sedimentation, and highly active microorganisms are selectively returned to the biological treatment tank, while the rest are discharged from the system. The device has a simple structure, strong adaptability, and good operating economy. Through the setting of the platform assembly 1, the height of the platform plate 101 and the selector assembly 2 can be adjusted by starting and controlling the support column mechanism 102 during use, so as to clean and maintain the selector assembly 2 from the bottom, so as to maintain the performance of the device.

[0026] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A return sludge selector comprising a selector assembly (2) and a dosing tank assembly (3), characterised in that, The bottom of the selector assembly (2) and the medicine box assembly (3) is provided with a stand assembly (1). The selector assembly (2) includes a vertical cylindrical body (201), an inlet pipe (202) on the inner wall of the vertical cylindrical body (201), a reflector plate (207) on the inner wall of the vertical cylindrical body (201), a conical hopper bottom (203) at the bottom of the vertical cylindrical body (201), a first mud outlet (204) on the middle side of the outer wall of the vertical cylindrical body (201), a second mud outlet (205) on the lower side of the outer wall of the vertical cylindrical body (201), and a third mud outlet (206) at the bottom of the conical hopper bottom (203).

2. A return sludge selector according to claim 1, characterised in that The medicine dispensing box assembly (3) includes an upper support (303) fixedly mounted on the frame assembly (1). The top of the upper support (303) is fixedly connected to a medicine dispensing box (301). The output end of the medicine dispensing box (301) is provided with a drain pipe (302), and a control valve is provided at the connection point of the drain pipe (302) near the medicine dispensing box (301).

3. A return sludge selector according to claim 2, wherein, The dosing box (301) contains a 10% NaCl solution.

4. A return sludge selector according to claim 1, wherein The vertical cylindrical body (201) is a stainless steel vertical cylindrical body.

5. A return sludge selector according to claim 1, wherein The reflector (207) is a downward-facing conical reflector.

6. A return sludge selector according to claim 1, wherein The platform assembly (1) includes a platform plate (101) and four support column mechanisms (102), and the four support column mechanisms (102) are symmetrically arranged at the bottom of the platform plate (101).

7. A return sludge selector according to claim 6, wherein The support column mechanism (102) includes an upper tray (1021) fixedly installed at the bottom of the platform plate (101), and a lifting hydraulic cylinder (1022) is fixedly connected to the bottom of the upper tray (1021), and an anti-slip chassis (1023) is fixedly connected to the bottom of the lifting hydraulic cylinder (1022).

8. A return sludge selector according to claim 6, wherein, The top of the platform plate (101) is provided with a slot (103), and the bottom of the conical bucket (203) is engaged with the inner wall of the slot (103).

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