Conditioning tank for advanced treatment of sludge

Abstract

The utility model relates to the field of sewage treatment, in particular to a conditioning tank for advanced sludge treatment, which comprises a tank body and a power shaft coaxially fixed in the tank body, a stirring impeller for stirring sludge and a conditioning agent is coaxially arranged on the power shaft, and a sludge feeding port is arranged on the tank wall of the tank body; a diffusion impeller located on a sludge falling path is arranged in the tank body, the axis of the diffusion impeller is arranged in the radial direction of the tank body, all blades of the diffusion impeller gradually expand outwards in the direction away from the sludge feeding opening to form a horn-mouth-shaped structure, and the diffusion impeller is driven by a power source to rotate so as to scatter the falling sludge. According to the utility model, the sludge conditioning time is greatly shortened, and the conditioning efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of sewage treatment, in particular to a conditioning tank used for deep treatment of sludge. Background Art

[0002] Currently, most sewage treatment uses the activated sludge method, which mixes wastewater with activated sludge (microorganisms) and aerates it to decompose organic pollutants in the wastewater. Biosolids are then separated from the treated wastewater, and part of them can be returned to the aeration tank as needed. The activated sludge method produces a large amount of residual sludge during daily operation. The residual sludge usually contains a considerable amount of toxic and harmful substances and unstabilized organic matter. If it is not properly treated and disposed of, it will cause direct or potential pollution to the environment.

[0003] In order to remove harmful substances in the sludge, it is necessary to put it into a sludge conditioning tank as described in the application number "CN217332361U", add a conditioning agent into the sludge, so that the sludge and the conditioning agent are fully stirred and reacted, and the sludge reaches the delivery standard before subsequent squeezing and dehydration treatment. At present, traditional sludge conditioning tanks usually use horizontal centrifugal pumps to inject sludge into the tank body from the side wall of the conditioning tank. When the sludge enters the conditioning tank, it is stirred by the stirring impeller in the tank body during the sedimentation process. However, when the sludge is injected into the conditioning tank from the side wall of the tank body, due to the high viscosity of the sludge and the fact that part of the sludge is in a clump shape during the injection process, part of the sludge is prone to accumulate at the bottom of the tank body and the side wall of the tank body directly below the sludge delivery port during the sedimentation process. The stirring impeller needs to stir for a long time to completely stir the sludge so that it can fully contact with the conditioning agent. The conditioning time is relatively long, so it needs to be solved urgently. Utility Model Content

[0004] In order to avoid and overcome the technical problems existing in the prior art, the utility model provides a conditioning tank for sludge deep treatment. The utility model greatly shortens the sludge conditioning time and improves the conditioning efficiency.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A conditioning tank for deep sludge treatment comprises a tank body and a power shaft coaxially fixed in the tank body, a stirring impeller for stirring sludge and a conditioning agent is coaxially arranged on the power shaft, a sludge delivery port is provided on the tank wall of the tank body; a diffusion impeller located on the sludge falling path is arranged in the tank body, the axis of the diffusion impeller is arranged radially along the tank body, and the blades of the diffusion impeller gradually expand outwards in a direction away from the sludge delivery port to form a trumpet-shaped structure, and the diffusion impeller is driven to rotate by a power source to disperse the falling sludge.

[0007] As a further solution of the utility model: a driven shaft is arranged in a radial cantilever manner on the tank wall of the tank body, the driven shaft rotates with the tank body through a support seat, and the diffusion impeller is coaxially fixed on the shaft body of the driven shaft; a driven gear is coaxially fixed to the end of the driven shaft away from the support seat, and a driving gear meshing with the driven gear is coaxially fixed on the power shaft, the driving gear and the driven gear are both bevel gears, and the power shaft is the power source of the diffusion impeller.

[0008] As a further solution of the utility model: at least two groups of stirring impellers are arranged on the power shaft in the vertical direction, and the diameter of each stirring impeller gradually increases from top to bottom; a driving motor is installed on the top of the tank body, and the power shaft of the driving motor extends from top to bottom into the tank cavity of the tank body, and each stirring impeller is arranged below the driving gear.

[0009] As a further solution of the utility model: a dosing port for adding a conditioning agent is arranged on the top of the tank body, and the dosing port is located within the projection range of the diffusion impeller along the vertical direction.

[0010] As a further solution of the utility model: the sludge delivery port is arranged on the side wall of the tank body and is connected to a centrifugal pump for conveying sludge through a sludge conveying pipe.

[0011] As a further solution of the utility model: a discharge port for discharging sludge is provided at the bottom of the tank side wall, an overflow port is provided at the top of the tank side wall, and the overflow port and the discharge port are connected to the dehydration room through a conduit.

[0012] As a further solution of the utility model: a liquid level meter and a sludge concentration meter are installed in the tank body.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. When the sludge is put into the tank, the utility model first disperses the sludge in the axial direction of the power shaft through the diffusion impeller to prevent part of the sludge from accumulating below the sludge delivery port. After the sludge is dispersed, the sludge is stirred by the stirring impeller and fully mixed with the conditioning agent, which greatly shortens the sludge conditioning time and improves the conditioning efficiency.

[0015] 2. The utility model has a cantilevered driven shaft arranged on the tank wall. Through gear meshing, the driven shaft is driven to rotate synchronously during the rotation of the power shaft, thereby driving the diffusion impeller to rotate and disperse the sludge, and the sludge dispersion and stirring functions are simultaneously achieved through the same power source.

[0016] 3. The dosing port of the utility model is arranged just above the diffusion impeller. In the process of sludge being dispersed, the conditioning agent can be dispersed synchronously with the sludge, further improving the diffusion efficiency of the conditioning agent.

[0017] 4. The utility model automatically adds sludge according to the liquid level set by the liquid level meter and stops after reaching the set liquid level value; the conditioning agent dosing system automatically calculates the amount of conditioning agent to be added according to the sludge concentration and volume displayed by the sludge concentration meter, and controls the dosing pump to add the conditioning agent into the tank body. While adding the conditioning agent, stirring is started synchronously to achieve full mixing of the sludge and the conditioning agent. After the conditioning agent is added, the dosing stops automatically, and the stirring continues until the next cycle when the sludge is added and stops automatically. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model.

[0019] In the figure:

[0020] 1. Tank body; 11. Sludge delivery port; 12. Discharge port; 13. Overflow port;

[0021] 14. Converging pipe; 15. Dosing port; 16. Sludge conveying pipe;

[0022] 2. Driving motor; 21. Power shaft; 22. Driving gear; 23. Stirring impeller;

[0023] 3. Driven shaft; 31. Support seat; 32. Diffuser impeller; 33. Driven gear. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1 In an embodiment of the utility model, a conditioning tank for deep treatment of sludge includes a cylindrical tank body 1, a driving motor 2 is installed on the top of the tank body 1, and the motor shaft of the driving motor 2 is used as a power shaft 21, which is inserted into the tank cavity of the tank body 1 from top to bottom along the axial direction of the tank body 1. A plurality of stirring impellers 23 are arranged on the power shaft 21, and the diameter of each stirring impeller 23 gradually increases from top to bottom, and the stirring impeller 23 is arranged between the middle layer and the bottom layer of the tank body 1.

[0026] A discharge port 12 controlled by a solenoid valve is installed at the bottom of the side wall of the tank body 1. An overflow port 13 is installed at the bottom of the side wall of the tank body 1 for liquid overflow to avoid exceeding the maximum liquid level. The overflow port 13 is preferably located directly above the discharge port 12. The overflow pipe of the overflow port 13 is connected to the two inlets of the tee with the discharge port 12, and the outlet of the tee is connected to the dewatering room through the manifold 14. After the conditioned sludge enters the dewatering room through the manifold 14, it is pumped into the plate-and-frame machine by a screw pump for squeezing and dewatering.

[0027] A liquid level meter and a sludge concentration meter are installed in the tank body 1 to monitor the liquid level and sludge concentration in the tank body 1 in real time. A sludge delivery port 11 is installed in the middle of the inner wall of the tank body 1, and the pump outlet of the horizontal centrifugal pump for conveying sludge is connected to the sludge delivery port 11 through a sludge conveying pipe 16, so as to continuously convey sludge into the tank body 1.

[0028] A driven shaft 3 is radially mounted on the inner wall of the tank body 1, and the driven shaft 3 is located directly below the sludge delivery port 11. A support seat 31 is mounted on the tank wall of the tank body 1, and the driven shaft 3 is cantilever-fixed on the tank wall of the tank body 1 through the support seat 31. At least two groups of ball bearings are arranged in the support seat 31, and the support seat 31 is supported by the ball bearing group and swivels with the tank wall of the tank body 1. A positioning bearing can also be installed in the support seat 31 to prevent the driven shaft 3 from moving in the axial direction.

[0029] A driven gear 33 is coaxially fixed to one end of the driven shaft 3 away from the support seat 31, and a driving gear 22 is coaxially fixed to the power shaft 21. The driving gear 22 is located above each stirring impeller 23, and both the driving gear 22 and the driven gear 33 are bevel gears, which drive the driven gear 33 and the driven shaft 3 to rotate through gear meshing.

[0030] A diffusion impeller 32 is coaxially fixed to the shaft of the driven shaft 3, and blades are evenly arranged on the wheel disc of the diffusion impeller 32 in the radial direction. The blades of the diffusion impeller 32 gradually expand outward from the direction away from the support seat 31 to the direction of the power shaft 21, so as to be arranged in a trumpet shape. The sludge put into the tank cavity by the sludge putting port 11 contacts the high-speed rotating diffusion impeller 32 during the falling process, and is sheared and dispersed to the axis center of the tank cavity, and then stirred evenly by the stirring impeller 23.

[0031] A dosing port 15 for controlling the dosage of the agent through a dosing pump is installed on the top of the tank body 1. The dosing port 15 is located directly above the diffusion impeller 32. After the agent is added into the tank body 1, it is diffused into the tank cavity of the tank body 1 synchronously with the sludge.

[0032] The centrifugal pump automatically adds sludge according to the liquid level set by the liquid level meter, and then stops after reaching the set liquid level value; the conditioning agent dosing system automatically calculates the amount of conditioning agent to be added according to the sludge concentration and volume displayed by the sludge concentration meter, and controls the dosing pump to add the conditioning agent into the tank body. While adding the conditioning agent, stirring is started synchronously to achieve full mixing of the sludge and the conditioning agent. After the conditioning agent is added, the dosing stops automatically, and the stirring continues until the next cycle of sludge is automatically stopped; in the working state, the liquid level in the tank cavity is higher than the height of the sludge delivery port 11.

[0033] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0034] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

Claims

1. A conditioning tank for sludge deep treatment, characterized in that: The invention comprises a tank body (1) and a power shaft (21) coaxially fixed in the tank body (1); a stirring impeller (23) for stirring sludge and a conditioning agent is coaxially arranged on the power shaft (21); a sludge delivery port (11) is provided on the tank wall of the tank body (1); a diffusion impeller (32) is arranged in the tank body (1) and is located on the sludge falling path; the axis of the diffusion impeller (32) is arranged along the radial direction of the tank body (1); in a direction away from the sludge delivery port (11), each blade of the diffusion impeller (32) gradually expands outward to form a trumpet-shaped structure; the diffusion impeller (32) is driven by a power source to rotate to disperse the falling sludge.

2. A conditioning tank for sludge deep treatment according to claim 1, characterized in that: A driven shaft (3) is cantilevered radially on the tank wall of the tank body (1), the driven shaft (3) being rotationally matched with the tank body (1) via a support seat (31), and a diffusion impeller (32) being coaxially fixed on the shaft body of the driven shaft (3); a driven gear (33) is coaxially fixed on one end of the driven shaft (3) away from the support seat (31), a driving gear (22) meshing with the driven gear (33) is coaxially fixed on the power shaft (21), the driving gear (22) and the driven gear (33) are both bevel gears, and the power shaft (21) is the power source of the diffusion impeller (32).

3. A conditioning tank for sludge deep treatment according to claim 2, characterized in that: At least two groups of stirring impellers (23) are arranged on the power shaft (21) in a vertical direction, and the diameter of each stirring impeller (23) gradually increases from top to bottom; a driving motor (2) is installed on the top of the tank body (1), and the power shaft (21) of the driving motor (2) extends from top to bottom into the tank cavity of the tank body (1), and each stirring impeller (23) is arranged below the driving gear (22).

4. A conditioning tank for sludge deep treatment according to any one of claims 1 to 3, characterized in that: A dosing port (15) for adding a conditioning agent is arranged on the top of the tank body (1), and the dosing port (15) is located within the projection range of the diffusion impeller (32) in the vertical direction.

5. A conditioning tank for sludge deep treatment according to any one of claims 1 to 3, characterized in that: The sludge delivery port (11) is arranged on the side wall of the tank body (1) and is connected to a centrifugal pump for conveying sludge via a sludge conveying pipe (16).

6. A conditioning tank for sludge deep treatment according to any one of claims 1 to 3, characterized in that: A discharge port (12) for discharging sludge is provided at the bottom of the side wall of the tank body (1), an overflow port (13) is provided at the top of the side wall of the tank body (1), and the overflow port (13) and the discharge port (12) are connected to the dehydration room via a confluence pipe (14).

7. A conditioning tank for sludge deep treatment according to any one of claims 1 to 3, characterized in that: A liquid level meter and a sludge concentration meter are installed in the tank body (1).

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