A self-driven wastewater circulation mixer

Abstract

This utility model discloses a self-driven wastewater circulation mixer, including a cylinder, a cylinder cover, an additive storage tank on top of the cover for adding additives into the wastewater inside the cylinder, a drain pipe at the bottom of the cylinder for discharging the mixed wastewater, a first inlet pipe on the side wall of the cylinder arranged tangentially to allow the wastewater inside the cylinder to flow clockwise, a second inlet pipe on the side wall of the cylinder, and a self-driven stirring mechanism inside the cylinder. The second inlet pipe guides the wastewater to impact the self-driven stirring mechanism, causing the wastewater inside the cylinder to circulate axially. The mixer has a first inlet pipe guiding the wastewater inside the cylinder to flow clockwise for convenient radial mixing of wastewater and additives, and a second inlet pipe guiding the impeller to rotate counterclockwise. The impeller drives the propeller blades to rotate, causing the wastewater to circulate axially, allowing wastewater and additives of different depths to mix more quickly.

Description

Technical Field

[0001] This utility model relates to the technical field of wastewater treatment equipment, and in particular to a self-driven wastewater circulation mixing device. Background Technology

[0002] In wastewater treatment processes, thorough mixing of wastewater is one of the key steps to ensure treatment effectiveness. Effective mixing can promote full contact between pollutants in wastewater and treatment agents, accelerate the chemical reaction process, and improve wastewater treatment efficiency and quality.

[0003] Most common wastewater mixing equipment on the market is driven by motors, which requires additional energy consumption. In traditional mixing devices, wastewater mainly flows in a circular direction, and the mixing is mainly horizontal. The vertical mixing effect is poor, resulting in poor mixing effect between wastewater and additives. Utility Model Content

[0004] In view of the above-mentioned prior art, the present invention provides a self-driven sewage circulation mixing mixer. The mixer is provided with a first water inlet pipe, which guides the sewage in the cylinder to flow clockwise to facilitate radial mixing of sewage and additives. The mixer is provided with a second water inlet pipe, which guides the impeller to rotate counterclockwise. The impeller drives the propeller blades below the liquid surface to rotate, so that the sewage circulates axially, and sewage and additives at different water depths are mixed more quickly.

[0005] To achieve the above objectives, the technical solution of this utility model embodiment is implemented as follows: A self-driven wastewater circulation mixer includes a cylinder, a cylinder cover installed on the top of the cylinder, an additive storage tank installed on the upper part of the cylinder cover to add additives into the wastewater inside the cylinder, a drain pipe installed on the bottom of the cylinder to discharge the mixed wastewater, a first water inlet pipe installed on the side wall of the cylinder, the first water inlet pipe being arranged along the tangent of the cylinder to make the wastewater inside the cylinder circulate clockwise, a second water inlet pipe also being installed on the side wall of the cylinder, and a self-driven stirring mechanism being provided inside the cylinder, the second water inlet pipe guiding the wastewater to impact the self-driven stirring mechanism to make the wastewater inside the cylinder circulate axially.

[0006] Furthermore, the self-driven stirring mechanism includes a first support rod, one end of which is fixed to the inner wall of the cylinder, and the other end of which is connected to a bearing. A rotating shaft is supported and connected inside the bearing, and the axis of the rotating shaft coincides with the axis of the cylinder. An impeller is fixedly connected to the end of the rotating shaft near the cylinder cover. A second water inlet pipe guides the sewage to impact the impeller and rotate counterclockwise. A propeller blade is fixedly connected to the end of the rotating shaft away from the cylinder cover. The propeller blade is used to drive the sewage to circulate along the axial direction of the cylinder.

[0007] Furthermore, the second water inlet pipe is set along the tangential direction of the impeller.

[0008] Furthermore, the bottom of the cylinder is funnel-shaped, and the drain pipe is connected to the lowest point of the cylinder.

[0009] Furthermore, the connection between the bottom of the cylinder and the side wall of the cylinder is rounded to facilitate the axial circulation of sewage.

[0010] Furthermore, a second support rod is fixedly connected to the inner wall of the cylinder, and a guide baffle is fixedly connected to the other end of the second support rod. The guide baffle is an inverted semi-circle, located below the propeller blade and above the sewage outlet. The guide baffle is used to guide the axially downward sewage to flow towards the cylinder wall to prevent the sewage from being discharged directly from the sewage pipe without being mixed with the additive.

[0011] Furthermore, the impeller is a bucket-type impeller, with the blades of the impeller having a hyperboloidal spoon shape at the end furthest from the axis of rotation.

[0012] Furthermore, a guide plate is installed on the side wall of the cylinder, located below the impeller and above the liquid surface inside the cylinder. The first water inlet pipe is located below the guide plate. The guide plate is a clockwise spiral plate. The rotating shaft passes through the guide plate and is rotatably connected to it. An opening is provided on the part of the guide plate away from the second water inlet pipe to allow the additive above to fall through.

[0013] Furthermore, the propeller blades are multi-layered blade structures, with each layer consisting of multiple blades, and the blades of different layers are circumferentially staggered.

[0014] The beneficial effects of this utility model are as follows: the sewage in the first inlet pipe guides the sewage in the cylinder to flow clockwise, directly utilizing the kinetic energy of the sewage itself to achieve the effect of stirring the sewage and facilitating mixing; the second inlet pipe uses the kinetic energy of the sewage to drive the self-driven stirring mechanism in the cylinder to rotate counterclockwise so that the sewage in the cylinder circulates axially. The flow direction of the sewage is opposite to the stirring direction, which can prevent the problem of weakened stirring and mixing effect caused by the stirring speed and sewage flow rate becoming the same.

[0015] The wastewater in the first inlet pipe guides the wastewater in the cylinder to circulate clockwise. The wastewater in the cylinder mainly flows radially. The wastewater in the second inlet pipe impacts the impeller, which rotates counterclockwise. This, in turn, drives the propeller blades below the liquid surface to rotate, pushing the wastewater to flow axially. The wastewater flows downward from the center of the cylinder under the action of the propeller blades, and then flows along the bottom and side walls of the cylinder to the wastewater surface, achieving axial circulation. The overall wastewater mixing effect is good.

[0016] The bottom of the cylinder is designed in a funnel shape, which facilitates the discharge of sewage from the cylinder and makes it easier for impurities in the sewage to be discharged from the cylinder.

[0017] A semi-circular baffle is installed between the bottom of the cylinder and the propeller blades to effectively prevent the downward-flowing sewage from forming a short circuit and being discharged directly, thus preventing the sewage from being discharged without being mixed with the additives.

[0018] A guide plate is designed below the impeller. The sewage flowing out of the second inlet pipe guides the impeller to rotate counterclockwise, which in turn causes the propeller blades below the liquid surface to rotate counterclockwise to push the sewage to flow axially. However, this will still affect the sewage flowing clockwise, causing the sewage flow rate to decrease. When the sewage flowing out of the second inlet pipe falls after impacting the impeller, it lands on the guide plate and flows down in a clockwise spiral. When it enters the sewage below, it can give some of the kinetic energy for the clockwise flow of the sewage below, further ensuring the stability of the sewage circulation flow. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a self-driven sewage circulation mixer according to the present invention; Figure 2 This is a top view of a self-driven wastewater circulation mixer according to the present invention. Figure 3 This is a cross-sectional view of a self-driven wastewater circulation mixer according to the present invention; Figure 4 This is a diagram showing the internal structure of a self-driven wastewater circulation mixer according to the present invention.

[0020] Reference numerals: 1. Cylinder body; 2. Cylinder cover; 3. Additive storage box; 4. First water inlet pipe; 5. Second water inlet pipe; 6. Sewage pipe; 7. First support rod; 8. Rotating shaft; 9. Impeller; 10. Propeller blade; 11. Bearing; 12. Guide baffle; 13. Second support rod; 14. Drain plate. Detailed Implementation

[0021] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in this specification of this utility model is for the purpose of describing particular embodiments only and is not intended to limit the utility model. In the following description, the expression "some embodiments" refers to a subset of all possible embodiments; however, it should be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments and can be combined with each other without conflict.

[0022] Combined with reference to the appendix Figures 1 to 4This utility model provides a self-driven sewage circulation mixing device, including a cylinder 1, a cylinder cover 2 installed on the top of the cylinder 1, an additive storage box 3 installed on the top of the cylinder cover 2 to add additives into the sewage inside the cylinder 1, a drain pipe 6 installed at the bottom of the cylinder 1 to discharge the mixed sewage, a first water inlet pipe 4 installed on the side wall of the cylinder 1, the first water inlet pipe 4 is arranged along the tangent direction of the cylinder 1 to make the sewage inside the cylinder 1 circulate clockwise, a second water inlet pipe 5 is also installed on the side wall of the cylinder 1, a self-driven stirring mechanism is provided inside the cylinder 1, and the second water inlet pipe 5 guides the sewage to impact the self-driven stirring mechanism to make the sewage inside the cylinder 1 circulate axially. Simply using sewage to drive the stirring mechanism to rotate can easily cause the sewage to synchronize with the flow rate and direction of the stirring components, resulting in a weakened or even absent stirring effect. Only a stable circumferential flow of sewage remains, which has little effect on the mixing of sewage and additives. The additives fall from the additive storage box 3 at the top of the cylinder cover 2 into the sewage inside the cylinder 1. A first water inlet pipe 4 is installed on the cylinder 1, which is set along the tangential direction of the cylinder 1 to make full use of the kinetic energy of the sewage, so that the sewage inside the cylinder 1 circulates clockwise. Meanwhile, the second water inlet pipe 5 guides the sewage to impact the self-driven stirring mechanism to stir in the opposite direction, so that the sewage inside the cylinder 1 circulates axially, effectively preventing the problem of weakened mixing effect caused by the sewage synchronizing with the flow rate and direction of the stirring device.

[0023] Preferably, the self-driven stirring mechanism includes a first support rod 7, one end of which is fixed to the inner wall of the cylinder 1, and the other end of which is connected to a bearing 11. A rotating shaft 8 is supported and connected inside the bearing 11. The axis of the rotating shaft 8 coincides with the axis of the cylinder 1. An impeller 9 is fixedly connected to the end of the rotating shaft 8 near the cylinder cover 2. A second water inlet pipe 5 guides the sewage to impact the impeller 9 and rotate counterclockwise. A propeller blade 10 is fixedly connected to the end of the rotating shaft 8 away from the cylinder cover 2. The propeller blade 10 is used to drive the sewage to circulate along the axial direction of the cylinder 1. The bearing 11 is fixed inside the cylinder 1 by the first support rod 7. The bearing 11 supports and fixes the rotating shaft 8. An impeller 9 is fixedly connected to one end of the rotating shaft 8 near the cylinder cover 2. The impeller 9 is above the liquid surface. The sewage entering the cylinder 1 from the second water inlet pipe 5 impacts the impeller 9, causing the impeller 9 to rotate counterclockwise. The impeller 9 is fixedly connected to the rotating shaft 8. The other end of the rotating shaft 8 is fixedly connected to the propeller blade 10. The propeller blade 10 is below the liquid surface. The propeller blade 10 rotates counterclockwise, pushing the sewage in the cylinder 1 to flow axially, so that the sewage in the cylinder 1 flows downward from the center, passes through the bottom and side wall of the cylinder 1, and flows back to the upper part of the cylinder 1, achieving a cycle and improving the mixing effect of sewage and additives.

[0024] Preferably, the second inlet pipe 5 is arranged along the tangential direction of the impeller 9. This fully utilizes the kinetic energy of the sewage flowing out of the second inlet pipe 5, as the sewage pushes the blades of the impeller 9 tangentially, resulting in high energy utilization.

[0025] Preferably, the bottom of the cylinder 1 is funnel-shaped, and the drain pipe 6 is connected to the lowest point of the cylinder 1. This helps to completely drain the sewage inside the cylinder 1 and prevents impurities in the sewage from settling inside the cylinder 1.

[0026] Preferably, the connection between the bottom of the cylinder 1 and the side wall of the cylinder 1 is rounded to facilitate the axial circulation of sewage. Reducing the resistance to the axial flow of sewage helps the sewage in the cylinder 1 to circulate axially.

[0027] Preferably, a second support rod 13 is fixedly connected to the inner wall of the cylinder 1, and a guide baffle 12 is fixedly connected to the other end of the second support rod 13. The guide baffle 12 is an inverted semi-circle, located below the propeller blade 10 and above the drain port. The guide baffle 12 is used to guide the axially downward sewage towards the cylinder wall to prevent the sewage from being discharged directly from the drain pipe 6 without being mixed with the additive. When the propeller blade 10 pushes the sewage in the cylinder 1 to flow axially downward, the sewage flows towards the side wall of the cylinder 1 through the guide baffle 12, instead of flowing directly to the drain port of the cylinder 1 and being discharged from the drain pipe 6. This effectively avoids the sewage in the cylinder 1 forming a short circuit, prevents the sewage from being discharged without being fully mixed with the additive, and improves the mixing effect of the entire equipment.

[0028] Preferably, the impeller 9 is a bucket-type impeller, and the end of the blades of the impeller 9 away from the rotating shaft 8 is in the shape of a hyperboloidal spoon. The impeller 9 is a bucket-type impeller, and the blades of the impeller 9 are concave spoon-shaped towards the point of impact with the sewage, so as not to reduce the utilization rate of sewage kinetic energy due to the sewage forming a certain angle with the blades, thereby improving the utilization rate of sewage kinetic energy.

[0029] Preferably, a guide plate 14 is installed on the side wall of the cylinder 1, located below the impeller 9 and above the liquid surface inside the cylinder 1. The first inlet pipe 4 is located below the guide plate 14. The guide plate 14 is a clockwise spiral plate. The rotating shaft 8 passes through the guide plate 14 and is rotatably connected to it. An opening is provided on the portion of the guide plate 14 away from the second inlet pipe 5 to allow the additive falling through. After the wastewater flowing out of the second inlet pipe 5 impacts the impeller 9 and rotates counterclockwise, the wastewater falls onto the clockwise spiral plate 14. The wastewater flows clockwise downwards and accelerates into the liquid below, reducing the impact on the original clockwise flow direction of the liquid. The structure is reasonable.

[0030] Preferably, the propeller blade 10 has a multi-layer blade structure, with each layer consisting of multiple blades arranged in a circumferentially staggered manner. This avoids the formation of cylindrical flow blind zones, and the helical axial flow generated by each layer of blades is staggered in the circumferential direction, forcing the fluid to cross-flow in the radial and axial directions, forming a three-dimensional turbulent mixing network, and improving the mixing effect of wastewater and additives.

[0031] Working principle: The additives in the additive storage tank 3 are added into the cylinder 1 according to the flow rate of the wastewater entering the mixer. The wastewater from the first inlet pipe 4 enters the cylinder 1 tangentially, making full use of the kinetic energy of the wastewater, causing the liquid at the bottom of the cylinder 1 to rotate clockwise. The additives and wastewater are mainly mixed horizontally and radially. The wastewater from the second inlet pipe 5 impacts the impeller 9, driving the impeller 9 to rotate counterclockwise. The impeller 9 drives the propeller blade 10 under the liquid surface to rotate counterclockwise through the rotating shaft 8. The propeller blade 10 drives the liquid in the cylinder 1 to move axially. The liquid at the center of the cylinder 1 flows downward to the guide baffle 12, and is guided by the guide baffle 12 to the side wall of the cylinder 1. Then it flows upward along the side wall of the cylinder 1, thus forming an axial circulation and stirring. This allows the liquid and the additive to have both horizontal radial circulation and axial stirring circulation in the cylinder 1, improving the mixing effect of the wastewater and the additive. The wastewater from the second inlet pipe 5 impacts the impeller 9 and flows clockwise into the liquid along the clockwise spiral downward guide plate 14, reducing the impact on the liquid flow direction and velocity, and ensuring the stability of the clockwise flow of wastewater in the cylinder 1.

[0032] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. The protection scope of this utility model should be determined by the protection scope of the stated claims.

Claims

1. A self-driven wastewater circulation mixer, comprising a cylinder (1), a cylinder cover (2) installed on the top of the cylinder (1), an additive storage tank (3) installed on the top of the cylinder cover (2) for adding additives into the wastewater inside the cylinder (1), and a drain pipe (6) installed at the bottom of the cylinder (1) for discharging the mixed wastewater, characterized in that: A first water inlet pipe (4) is installed on the side wall of the cylinder (1). The first water inlet pipe (4) is arranged along the tangential direction of the cylinder (1) so that the sewage in the cylinder (1) circulates clockwise. A second water inlet pipe (5) is also installed on the side wall of the cylinder (1). A self-driven stirring mechanism is provided inside the cylinder (1). The second water inlet pipe (5) guides the sewage to impact the self-driven stirring mechanism so that the sewage in the cylinder (1) circulates axially.

2. The self-driven sewage circulating mixer according to claim 1, characterized in that: The self-driven stirring mechanism includes a first support rod (7), one end of which is fixed to the inner wall of the cylinder (1), and the other end of which is connected to a bearing (11). A rotating shaft (8) is supported and connected inside the bearing (11). The axis of the rotating shaft (8) coincides with the axis of the cylinder (1). An impeller (9) is fixedly connected to the end of the rotating shaft (8) near the cylinder cover (2). The second water inlet pipe (5) guides the sewage to impact the impeller (9) to rotate counterclockwise. A propeller blade (10) is fixedly connected to the end of the rotating shaft (8) away from the cylinder cover (2). The propeller blade (10) is used to drive the sewage to circulate along the axial direction of the cylinder (1).

3. A self-priming sewage circulating mixer according to claim 2, wherein: The second water inlet pipe (5) is arranged along the tangential direction of the impeller (9).

4. The self-driven sewage circulating mixer according to claim 2, characterized in that: The bottom of the cylinder (1) is funnel-shaped, and the drain pipe (6) is connected to the lowest point of the cylinder (1).

5. The self-priming sewage circulating mixer according to claim 2, wherein: The bottom of the cylinder (1) is connected to the side wall of the cylinder (1) with a rounded chamfer to facilitate the axial circulation of sewage.

6. The self-priming sewage circulating mixer according to claim 2, wherein: A second support rod (13) is fixedly connected to the inner wall of the cylinder (1). A guide baffle (12) is fixedly connected to the other end of the second support rod (13). The guide baffle (12) is an inverted semi-circle. The guide baffle (12) is located below the propeller blade (10) and above the sewage outlet. The guide baffle (12) is used to guide the axially downward sewage to flow towards the cylinder wall to avoid the sewage being discharged directly from the sewage pipe (6) without being mixed with the additive.

7. The self-priming sewage circulating mixer according to claim 2, wherein: The impeller (9) is a bucket impeller, and the blades of the impeller (9) are hyperboloid spoon-shaped at the end away from the shaft (8).

8. The self-priming sewage circulating mixer according to claim 2, characterized in that: A flow guide plate (14) is installed on the side wall of the cylinder (1). The flow guide plate (14) is located below the impeller (9) and above the liquid level inside the cylinder (1). The first water inlet pipe (4) is located below the flow guide plate (14). The flow guide plate (14) is a spiral plate that spirals downward clockwise. The rotating shaft (8) passes through the flow guide plate (14) and is rotatably connected to the flow guide plate (14). The portion of the flow guide plate (14) away from the second water inlet pipe (5) has an opening to allow the additive above to fall through.

9. The self-priming sewage circulating mixer according to claim 2, wherein: The propulsion blade (10) is a multi-layer blade structure, with each layer consisting of multiple blades, and the blades of different layers are arranged in a circumferentially staggered manner.

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