Energy-saving and environment-friendly stirring device for industrial wastewater treatment

Abstract

The utility model belongs to industrial wastewater treatment technical field, concretely relates to a kind of stirring device for energy-saving and environment-friendly industrial wastewater treatment, by setting gradient dispersion type stirring rod, its both ends are rotatably connected with stirring barrel top and bottom respectively, the active control and quick dispersion of reagent release path are realized, the cavity structure of gradient dispersion type stirring rod directly transports reagent to stirring area inside, break through the limitation of traditional stirring device only relying on external agitation, avoid the top settlement delay and convection diffusion slow problem caused by the density of reagent similar, along the hole of increasing distribution from top to bottom of stirring rod, in combination with the rotation centrifugal force of spiral stirring rod, reagent is synchronously gradient release at different depth of sewage, forcedly break the concentration local uneven phenomenon, improve flocculating agent dispersion uniformity, reduce the high speed or long time operation needed by stirring device to make up mixing defect, reduce energy consumption, and avoid excessive shear damage flocculation structure, make precipitation efficiency improve.

Description

Technical Field

[0001] This utility model belongs to the field of industrial wastewater treatment technology, specifically relating to an energy-saving and environmentally friendly stirring device for industrial wastewater treatment. Background Technology

[0002] In the field of industrial wastewater treatment, adding flocculants to promote the coagulation and sedimentation of suspended solids is a commonly used energy-saving and environmentally friendly technology. In existing technologies, flocculants are usually added to the top of the wastewater treatment tank and mixed by a stirring device. Such devices are mostly driven by a motor to rotate the stirring shaft and blades, and mechanical agitation promotes the contact between the agent and the wastewater.

[0003] However, since the density of flocculants and other agents is usually similar to that of water, their settling process after being added from the top of the container is constrained by both gravity and fluid resistance, making it difficult to disperse quickly and evenly. This is especially true when treating high-turbidity wastewater. In the initial stage, the agent settles downwards, but due to insufficient density difference, it easily forms convection with the water, resulting in slow diffusion and even creating areas with excessively high or low agent concentrations. This uneven dispersion not only causes problems such as large differences in floc size and loose structure, reducing the settling speed of large flocs and increasing the load on the sedimentation tank, but also forces the stirring device to extend its operating time or increase its speed to compensate for mixing defects, resulting in energy waste, which contradicts the energy-saving and environmental protection requirements of industrial wastewater treatment. In addition, traditional stirring blades can only indirectly promote mixing through external agitation and cannot actively control the agent release path, further limiting the improvement of treatment efficiency. To address this, an energy-saving and environmentally friendly stirring device for industrial wastewater treatment is proposed. Utility Model Content

[0004] To address the problems mentioned above, this utility model provides an energy-saving and environmentally friendly stirring device for industrial wastewater treatment.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] An energy-saving and environmentally friendly stirring device for industrial wastewater treatment includes a stirring tank and a gradient dispersion stirring rod disposed inside the stirring tank. The two ends of the gradient dispersion stirring rod are rotatably connected to the bottom center and the top center of the stirring tank, respectively. The gradient dispersion stirring rod is used to actively control the release path of the reagent and accelerate the release of the reagent.

[0007] Furthermore, the gradient dispersion stirring rod includes a spiral stirring rod and a rotating rod. One end of the spiral stirring rod is rotatably connected to the bottom center of the stirring tank, and the other end of the spiral stirring rod is fixedly connected to one end of the rotating rod. The other end of the rotating rod rotatably passes through the top center of the stirring tank. Both the rotating rod and the spiral stirring rod are hollow structures, and the hollow structures of the rotating rod and the spiral stirring rod are connected. The spiral stirring rod is provided with several through holes for releasing the agent.

[0008] Furthermore, the mixing tank is also provided with a drug feeding bin that cooperates with the rotating rod. The drug feeding bin is a first conical structure. The tip of the first conical structure is connected to the cavity of the rotating rod by a connecting block. The connecting block is rotatably connected to the rotating rod, and the connecting block is fixedly connected to the tip of the first conical structure.

[0009] Furthermore, the spiral stirring rod has 3, 6, or 9 spiral sections. The spiral stirring rod near the top of the mixing tank has one through hole, the spiral stirring rod near the bottom of the mixing tank has three through holes, and the spiral stirring rod in the middle has two through holes. The through holes arranged from top to bottom along the spiral stirring rod make the spiral stirring rod form a gradient dispersion structure.

[0010] Furthermore, the through hole has a second conical structure, and the conical tip of the second conical structure is close to the outside of the spiral stirring rod.

[0011] Furthermore, the tilt angle of the second conical structure is greater than or equal to 150°.

[0012] Furthermore, a hydrophobic layer is provided on the inner wall of the second conical structure.

[0013] Furthermore, a self-opening and closing check valve is provided on the through hole.

[0014] The beneficial effects of this utility model are as follows:

[0015] By setting up a gradient dispersion stirring rod, with its two ends rotatably connected to the top and bottom of the mixing tank respectively, active control and rapid dispersion of the agent release path are achieved. The cavity structure of the gradient dispersion stirring rod directly delivers the agent into the mixing zone, breaking through the limitations of traditional stirring devices that rely solely on external agitation. This avoids the problems of delayed top settling and slow convection diffusion caused by agents with similar densities. The through holes distributed progressively from top to bottom along the stirring rod, combined with the centrifugal force of the rotating spiral stirring rod, enable the agent to be released synchronously and gradient-wise at different depths of the wastewater. This forcibly breaks up local uneven concentration phenomena, improves the uniformity of flocculant dispersion, reduces the need for high-speed or long-term operation of the stirring device to compensate for mixing defects, reduces energy consumption, and avoids excessive shearing that damages the floc structure, thereby improving sedimentation efficiency. Attached Figure Description

[0016] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the overall structure of the stirring device of this utility model;

[0018] Figure 2This is a partially enlarged view of the gradient dispersion stirring rod of this utility model;

[0019] Figure 3 This is a three-dimensional structural schematic diagram of the gradient dispersion stirring rod of this utility model;

[0020] Figure 4 This is a schematic diagram of the through-hole structure of this utility model.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Mixing tank body; 2. Gradient dispersion mixing rod; 21. Spiral mixing rod; 22. Rotating rod; 23. Through hole; 3. Reagent feeding bin; 4. Connecting block. Detailed Implementation

[0023] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0024] like Figure 1 - Figure 4 As shown, the present invention provides an energy-saving and environmentally friendly stirring device for industrial wastewater treatment, comprising a stirring tank 1 and a gradient dispersion stirring rod 2 disposed inside the stirring tank. The two ends of the gradient dispersion stirring rod 2 are rotatably connected to the bottom center and the top center of the stirring tank, respectively. The gradient dispersion stirring rod 2 is used to actively control the release path of the reagent and accelerate the release of the reagent.

[0025] Currently, because the density of flocculants and other agents is usually similar to that of water, the settling process of existing technologies, after being added from the top of the container, is constrained by both gravity and fluid resistance, making it difficult to disperse quickly and evenly. This is especially true when treating high-turbidity wastewater. In the initial stage, the agent settles downwards, but due to insufficient density difference, it easily forms convection with the water, resulting in slow diffusion and even creating areas with excessively high or low agent concentrations. This uneven dispersion not only causes problems such as large differences in floc size and loose structure, reducing the settling speed of large flocs and increasing the load on the sedimentation tank, but also forces the stirring device to extend its operating time or increase its speed to compensate for mixing defects, resulting in energy waste, which contradicts the energy-saving and environmental protection requirements of industrial wastewater treatment. In addition, traditional stirring blades can only indirectly promote mixing through external agitation and cannot actively control the agent release path, further limiting the improvement of treatment efficiency.

[0026] To address the aforementioned issues, a gradient dispersion stirring rod 2 is installed, with its two ends rotatably connected to the top and bottom of the mixing tank, respectively. This enables active control and rapid dispersion of the agent release path. The hollow structure of the gradient dispersion stirring rod 2 directly delivers the agent to the mixing zone, overcoming the limitations of traditional mixing devices that rely solely on external agitation. This avoids the problems of delayed top settling and slow convection diffusion caused by agents with similar densities. The through holes 23, which increase in number from top to bottom along the stirring rod, combined with the centrifugal force of the rotating spiral stirring rod 21, allow the agent to be released synchronously and gradient-wise at different depths of the wastewater. This forcibly breaks up localized uneven concentrations, improves the uniformity of flocculant dispersion, reduces the need for high-speed or long-term operation of the mixing device to compensate for mixing defects, lowers energy consumption, and avoids excessive shearing that damages the floc structure, thereby improving sedimentation efficiency.

[0027] Further, in one embodiment, the gradient dispersion stirring rod 2 includes a spiral stirring rod 21 and a rotating rod 22. One end of the spiral stirring rod 21 is rotatably connected to the bottom center of the mixing tank, and the other end of the spiral stirring rod 21 is fixedly connected to one end of the rotating rod 22. The other end of the rotating rod 22 rotatably passes through the top center of the mixing tank. Both the rotating rod 22 and the spiral stirring rod 21 are hollow structures, and the hollow structures of the rotating rod 22 and the spiral stirring rod 21 are interconnected. The hollow structure enables internal delivery of the agent and avoids interference from external water flow. The spiral structure enhances fluid turbulence and improves mixing efficiency. The spiral stirring rod 21 is provided with several through holes 23 for releasing the agent. In addition, the spiral stirring rod 21 is externally connected to a driving device, which is a motor. The motor is installed on the bottom outer wall of the mixing tank, and a bracket is also installed at the bottom of the mixing tank to ensure that there is a gap between the motor and the ground.

[0028] To prevent clogging during reagent addition, improve feeding stability, and better suit high-turbidity wastewater, in this embodiment, the mixing tank is also equipped with a reagent feeding bin 3 that cooperates with the rotating rod 22. The reagent feeding bin 3 has a first conical structure. The tip of the first conical structure is connected to the cavity of the rotating rod 22 by a connecting block 4. The connecting block 4 is rotatably connected to the rotating rod 22, and the connecting block 4 is fixedly connected to the tip of the first conical structure. The first conical structure guides the reagent to flow smoothly into the cavity, and the design of the connecting block 4 avoids rotational interference, ensuring continuous feeding.

[0029] To eliminate the problem of uneven reagent distribution in high-turbidity wastewater caused by depth differences, in this embodiment, the spiral stirring rod 21 has 3, 6, or 9 spiral sections. One through-hole 23 is provided on the spiral stirring rod 21 near the top of the mixing tank, three through-holes 23 are provided on the spiral stirring rod 21 near the bottom of the mixing tank, and two through-holes 23 are provided on the spiral stirring rod 21 in the middle. The through-holes 23 arranged along the spiral stirring rod 21 from top to bottom create a gradient dispersion structure. The spiral stirring rod 21 has 3 / 6 / 9 spiral sections, and the number of through-holes 23 increases gradually from top to bottom. Figure 1 As shown, this application takes a spiral stirring rod 21 with 9 spiral sections as an example. The gradient through holes 23 match the changes in sewage depth pressure, and more holes at the bottom release to compensate for the resistance of the agent settling, ensuring uniform dispersion throughout the layer.

[0030] To prevent release failure caused by blockage of the through hole 23, extend the service life of the device, and reduce maintenance frequency, in this embodiment, the through hole 23 is a second conical structure, and the conical tip of the second conical structure is close to the outside of the spiral stirring rod 21. The tilt angle of the second conical structure is greater than or equal to 150°. The larger tilt angle can reduce the area for dirt adhesion and also prevent the adhesion of the agent. A hydrophobic layer is provided on the inner wall of the second conical structure. The conical tip expands the spray range outward, the hydrophobic layer reduces agent residue, and the large tilt angle of 150° prevents dirt blockage. The hydrophobic layer here is a hydrophobic material made of polypropylene or polyethylene.

[0031] To prevent backflow contamination and subsequent drug caking and failure, and to ensure long-term operational reliability, in this embodiment, a self-closing check membrane is provided on the through hole 23. The membrane automatically closes when stirring stops to prevent sewage backflow and contamination of the drug channel. The self-closing check membrane here is an elastic membrane. An elastic membrane covers the through hole 23. When water flows out, the membrane opens, and when the water flow is still or reversed, the membrane closes to prevent water from entering. The elastic membrane is a spring with a silicone sheet or a rubber sheet.

[0032] The working process and working principle of this utility model:

[0033] The reagent enters the cavity of the rotating rod 22 through the conical reagent feeding bin 3, and is then conveyed to the interior of the spiral stirring rod 21 through the connecting cavity. The driving device drives the rotating rod 22 and the spiral stirring rod 21 to rotate at a uniform speed. Under the action of centrifugal force, the reagent is sprayed outward along the gradient distribution of the through holes 23—one hole at the top, two holes in the middle, and three holes at the bottom (taking a 9-section spiral as an example)—forming a depth gradient release, directly covering different depths of the sewage. The spiral structure synchronously agitates the water body to generate turbulence, allowing the reagent to mix rapidly with the high-turbidity wastewater, avoiding the traditional top-down mixing method. To address the settling delay and uneven concentration caused by partial dosing, the 150° outward-expanding conical structure of through-hole 23, combined with a polypropylene hydrophobic layer, reduces reagent residue and dirt adhesion, preventing clogging. When stirring stops, the silicone or rubber sheet inside through-hole 23, in conjunction with the spring, closes due to elastic rebound, blocking sewage backflow and protecting the cleanliness of the reagent channel. Through precise gradient release of reagents, forced turbulent mixing, and anti-clogging and anti-backflow design, the uniformity of flocculant dispersion is improved, energy consumption is reduced, and the integrity of the floc structure and sedimentation efficiency are ensured.

[0034] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An energy-saving and environment-friendly stirring device for industrial wastewater treatment, characterized in that, The device includes a mixing tank and a gradient dispersion stirring rod disposed inside the mixing tank. The two ends of the gradient dispersion stirring rod are rotatably connected to the bottom center and the top center of the mixing tank, respectively. The gradient dispersion stirring rod is used to actively control the drug release path and accelerate drug release.

2. The energy-saving and environment-friendly stirring device for industrial wastewater treatment according to claim 1, characterized in that: The gradient dispersion stirring rod includes a spiral stirring rod and a rotating rod. One end of the spiral stirring rod is rotatably connected to the bottom center of the stirring tank, and the other end of the spiral stirring rod is fixedly connected to one end of the rotating rod. The other end of the rotating rod rotatably passes through the top center of the stirring tank. Both the rotating rod and the spiral stirring rod are hollow structures, and the hollow structures of the rotating rod and the spiral stirring rod are connected. The spiral stirring rod is provided with several through holes for releasing the agent.

3. The stirring device for energy-saving and environmentally friendly industrial wastewater treatment according to claim 2, characterized in that: The mixing tank is also equipped with a drug feeding bin that cooperates with the rotating rod. The drug feeding bin is a first conical structure. The tip of the first conical structure is connected to the cavity of the rotating rod by a connecting block. The connecting block is rotatably connected to the rotating rod and is fixedly connected to the tip of the first conical structure.

4. The stirring device for energy-saving and environmentally friendly industrial wastewater treatment according to claim 2, characterized in that: The spiral stirring rod has 3, 6, or 9 spiral sections. The spiral stirring rod near the top of the mixing tank has one through hole, the spiral stirring rod near the bottom of the mixing tank has three through holes, and the spiral stirring rod in the middle has two through holes. The through holes arranged from top to bottom along the spiral stirring rod make the spiral stirring rod form a gradient dispersion structure.

5. The stirring device for treating energy-saving and environmentally friendly industrial wastewater according to claim 4, characterized in that: The through hole has a second conical structure, and the conical tip of the second conical structure is close to the outside of the spiral stirring rod.

6. The stirring device for energy-saving and environmentally friendly industrial wastewater treatment according to claim 5, characterized in that: The tilt angle of the second conical structure is greater than or equal to 150°.

7. The stirring device for treating industrial wastewater according to claim 5, characterized in that: A hydrophobic layer is provided on the inner wall of the second conical structure.

8. The stirring device for energy-saving and environmentally friendly industrial wastewater treatment according to claim 4, characterized in that: The through hole is provided with a self-opening and closing check valve.

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