Slow mixing zone stirrer

Abstract

The utility model relates to the technical field of sewage treatment, and discloses a slow mixing zone stirrer which comprises a protective cylinder, a rotary cylinder and a stirring part, and the top and the bottom of the protective cylinder are open; the rotary drum is rotatably connected to an inner cavity of the protective cylinder, a plurality of spraying holes are formed in the side wall of the rotary drum, the spraying holes are formed in the side wall of the rotary drum, and the top of the rotary drum is rotatably connected with the water outlet end of a reclaimed water pipe in a sealed mode. Component force of counter-acting force of water sprayed out of each spray hole is tangent to the axis of the rotary drum; the stirring part is connected to the outer side of the bottom of the rotary drum. The device has the beneficial effects that sprayed reclaimed water generates counter-acting force on the rotary drum, and the rotary drum rotates under the counter-acting force, so that the stirring part is driven to continuously stir sewage in the slow mixing tank at a low speed, an electric stirrer is replaced, the influence on the sewage treatment quality due to motor failure is avoided, and electric energy can be saved.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a slow mixing zone agitator. Background Technology

[0002] The slow mixing zone (slow mixing zone / flocculation zone) of a wastewater treatment plant is a key treatment unit following the fast mixing zone (slow mixing zone). Its core function is to promote the full reaction between flocculant and wastewater through low-intensity stirring, forming large flocs that are easy to settle or filter.

[0003] Currently, electric low-speed mixers are used to stir flocculants in the slow mixing zone. Since the sewage in the slow mixing tank of the wastewater treatment plant is continuously flowing, the electric low-speed mixer needs to rotate at low speed and operate continuously for both stirring and flocculant addition. The motor of the electric low-speed mixer is prone to failure during long-term operation, which may result in the sewage flowing through the slow mixing zone only reacting with the flocculant on the surface during certain periods, while the middle and bottom areas of the sewage do not fully combine with the flocculant, resulting in the sewage treatment quality not meeting the requirements during the failure period. Utility Model Content

[0004] The technical problem this invention aims to solve is that current electric mixers consume a lot of electricity and are prone to failure during long-term continuous use, resulting in substandard wastewater treatment quality during periods of failure. The purpose is to provide a slow mixing zone mixer in which the sprayed water generates a reaction force on the rotating drum. The drum rotates under the action of the component of the reaction force, thereby driving the mixing unit to continuously and slowly mix the wastewater in the slow mixing tank. This replaces the electric mixer, avoids the impact of motor failure on wastewater treatment quality, and saves electricity.

[0005] This utility model is achieved through the following technical solution:

[0006] A slow-mixing zone mixer includes a protective cylinder, a rotating cylinder, and a mixing section. The top and bottom of the protective cylinder are both open. The rotating cylinder is rotatably connected to the inner cavity of the protective cylinder. Several spray holes are provided on the side wall of the rotating cylinder. The top of the rotating cylinder is rotatably and sealingly connected to the outlet end of a water pipe. In the working state, the reaction force component of the water sprayed from each spray hole is tangent to the axis of the rotating cylinder. The mixing section is connected to the outer bottom of the rotating cylinder.

[0007] The beneficial effects of this utility model are as follows: By rotatably connecting the rotating drum to the inner cavity of the protective casing, and setting several spray holes in an area smaller than the side wall of the rotating drum, and rotatably sealing the top of the rotating drum to the outlet end of the greywater pipe, it is convenient to input a small portion of greywater from the sewage treatment plant into the inner cavity of the rotating drum during operation. Since the greywater has a certain pressure at this time, it causes the greywater located in the inner cavity of the rotating drum to spray out from each spray hole. The sprayed water flow generates a reaction force on the rotating drum, thereby generating a torque around the axis of the rotating drum. The rotating drum rotates under the action of the component of the reaction force, thereby driving the stirring unit to rotate, achieving continuous and slow stirring of the sewage in the slow mixing tank. This replaces the electric stirrer, avoids the impact of motor failure on the quality of sewage treatment, and saves energy. Furthermore, by setting up the protective casing, the sprayed greywater is prevented from scattering, ensuring a clean on-site environment.

[0008] In some embodiments, the rotating drum is cylindrical and vertically mounted above the slow mixing tank. By setting the rotating drum to a cylindrical shape, the water flow ejected from the nozzles generates a torque around the axis of the rotating drum, thereby driving the stirring unit to rotate. Furthermore, vertically mounting the rotating drum above the slow mixing tank ensures smooth rotation of the drum.

[0009] In some embodiments, the nozzle has a circular cross-section. Taking advantage of the fact that a circular nozzle has the smallest circumference and the smallest flow fluctuation for the same cross-sectional area, sufficient reaction force is ensured from the sprayed water.

[0010] In some embodiments, the nozzles are evenly distributed along the outer side wall of the rotating drum. By evenly distributing the nozzles on the outer side wall of the rotating drum, the reaction force generated when the water flow is ejected is evenly applied to the rotating drum, enabling the rotating drum to operate smoothly.

[0011] In some embodiments, a high-speed rotary joint is also included, the two ends of which are respectively sealed to the top of the water pipe and the top of the rotating drum. The water pipe and the top of the rotating drum are connected by the high-speed rotary joint to achieve two rotatable sealed connections, so as to ensure that the water in the inner cavity of the rotating drum can maintain the water pressure when it enters, and thus generate a reaction force on the rotating drum when it is sprayed out.

[0012] In some embodiments, the protective sleeve is cylindrical, and the distance between the inner wall of the protective sleeve and the outer wall of the rotating cylinder is 30mm-60mm. By keeping the distance between the inner wall of the protective sleeve and the outer wall of the rotating cylinder at 30mm-60mm, the water sprayed from the rotating cylinder can enter the slow mixing tank from the bottom of the protective sleeve under the action of the protective sleeve, preventing the water from scattering outside the slow mixing tank.

[0013] In some embodiments, the system further includes a first bearing and a second bearing. Two mounting grooves are provided on the inner sidewall of the upper end of the protective cylinder. The outer rings of both the first and second bearings are installed in their respective mounting grooves, and their inner rings are interference-fitted with the upper end of the rotating cylinder. By installing the first and second bearings on the upper end of the rotating cylinder, the rotating cylinder is rotatably connected to the inner cavity of the protective cylinder.

[0014] In some embodiments, the stirring unit includes a mounting shaft and several stirring blades. The upper end of the mounting shaft is connected to the outer side of the bottom of the rotating drum, and the several stirring blades are evenly distributed and connected to the free end of the mounting shaft. In the working state, the lower end of the mounting shaft and the stirring blades are both located inside the wastewater in the slow mixing tank. By setting the mounting shaft and stirring blades, it is convenient for the stirring blades to extend into the wastewater and stir the flocculant under the action of the rotating drum.

[0015] In some embodiments, the protective sleeve is coaxial with the rotating drum. By making the protective sleeve coaxial with the rotating drum, interference between the rotating drum and the protective sleeve is prevented.

[0016] In some embodiments, the system further includes a mounting bracket and a base. The base is mounted on the ground outside the slow mixing tank. The mounting bracket is L-shaped, with one end extending above the slow mixing tank and fixedly connected to the outside of the protective cylinder, and the other end connected to the base. By setting the bracket and base to support and position the protective cylinder, the rotating drum, and the stirring unit, the rotating drum can be vertically mounted above the slow mixing tank.

[0017] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0018] 1. During operation, a small portion of the treated wastewater from the sewage treatment plant enters the inner cavity of the rotating drum through the treated wastewater pipe. Due to the pressure of the treated wastewater at this time, the treated wastewater located in the inner cavity of the rotating drum is sprayed out from various nozzles. The sprayed water flow generates a reaction force on the rotating drum, which in turn generates a torque around the axis of the rotating drum. The rotating drum rotates under the action of the component of the reaction force, thereby driving the agitator to rotate and realize continuous slow mixing of sewage in the slow mixing tank. This replaces the electric agitator, avoids the impact of motor failure on the quality of sewage treatment, and saves energy.

[0019] 2. Install protective casings to prevent the sprayed water from spreading and ensure a clean site environment. Attached Figure Description

[0020] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0021] Figure 1 This is a schematic diagram of the present invention installed in a slow mixing tank;

[0022] Figure 2 This is a partial external structural diagram of the present invention;

[0023] Figure 3 In this utility model Figure 2 Partial center section view;

[0024] Figure 4 In this utility model Figure 2 Top view;

[0025] Figure 5 This utility model Figure 3 Sectional view of AA.

[0026] The attached diagram shows the markings and corresponding component names:

[0027] 10 stirring blade, 11 hollow tube, 12 rotating drum, 13 spray hole, 20 first bearing, 21 second bearing, 22 protective sleeve, 30 water pipe, 32 high-speed rotary joint, 40 mounting bracket, 41 base, 50 slow mixing tank. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0029] Throughout this specification, references to "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in connection with that embodiment or example is included in at least one embodiment of the present invention. Therefore, the phrases "an embodiment," "an example," "an example," or "an example" appearing in various places throughout the specification do not necessarily refer to the same embodiment or example. Furthermore, specific features, structures, or characteristics can be combined in one or more embodiments or examples in any suitable combination and / or sub-combination. Moreover, those skilled in the art will understand that the illustrations provided herein are for illustrative purposes and are not necessarily drawn to scale. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] In the description of this utility model, the terms "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0031] The terms "first," "second," etc., used in this utility model are merely for clarity of description and are not intended to limit any order or emphasize importance. Furthermore, the term "connection" as used herein, unless otherwise specified, can refer to a direct connection or an indirect connection via other components.

[0032] Example

[0033] like Figures 1-5 As shown, this embodiment provides a slow mixing zone mixer, including a protective cylinder 22, a rotating cylinder 12, and a mixing section. The top and bottom of the protective cylinder 22 are both open. The rotating cylinder 12 is rotatably connected to the inner cavity of the protective cylinder 22. Several spray holes 13 are provided on the side wall of the rotating cylinder 12. The top of the rotating cylinder 12 is rotatably and sealingly connected to the outlet end of the water pipe 30. In the working state, the component of the reaction force of the water sprayed from each spray hole 13 is tangent to the axis of the rotating cylinder 12. The mixing section is connected to the outer bottom of the rotating cylinder 12. During operation, a small portion of the treated wastewater from the wastewater treatment plant is introduced into the inner cavity of the rotating drum 12 through the treated water pipe 30. Since the treated water has a certain pressure at this time, the treated water located in the inner cavity of the rotating drum 12 is sprayed out from each nozzle 13. The sprayed water flow generates a reaction force on the rotating drum 12, which in turn generates a torque around the axis of the rotating drum 12. The rotating drum 12 rotates under the action of the component of the reaction force, thereby driving the stirring part to rotate and realizing continuous slow stirring of the wastewater in the slow mixing tank 50.

[0034] See Figures 1-4 The rotating drum 12 is cylindrical and is vertically installed above the slow mixing tank 50. By setting the rotating drum 12 to a cylindrical shape, the water flow sprayed from the nozzle 13 can generate a torque around the axis of the rotating drum 12, thereby driving the stirring part to rotate. The rotating drum 12 is vertically installed above the slow mixing tank 50 so that the rotating drum 12 can rotate smoothly.

[0035] See Figure 3 The nozzle 13 is a circular through hole. Taking advantage of the fact that, for the same cross-sectional area, the circular nozzle 13 has the smallest perimeter and the smallest flow fluctuation, it ensures that the reaction force of the water sprayed out is sufficient.

[0036] See Figure 1 and Figure 5 The nozzles 13 can be evenly distributed along the side wall of the rotating drum. Alternatively, the nozzles 13 can be evenly distributed on the side wall of the rotating drum 12, or they can be only provided on a portion of the side wall of the rotating drum 12, as long as the rotating drum 12 can rotate at a suitable speed. The reaction force generated when the water flow is sprayed acts evenly on the rotating drum 12, so that the rotating drum 12 can rotate smoothly.

[0037] See Figures 1-4 It also includes a high-speed rotary joint 32, whose two ends are respectively sealed to the outlet end of the water pipe 30 and the top of the rotating drum 12. Connecting the water pipe 30 and the top of the rotating drum 12 via the high-speed rotary joint achieves two types of rotatable sealed connections to ensure that the water pressure inside the rotating drum 12 can be maintained at the initial water pressure, thereby generating a reaction force on the rotating drum 12 when it is ejected. The high-speed rotary joint can also adopt a high-pressure, high-speed rotating structure; however, the high-speed rotary joint is existing technology and will not be described further in this patent.

[0038] See Figures 1-4 The protective sleeve 22 is cylindrical, and the distance between the inner wall of the protective sleeve 22 and the outer wall of the rotating cylinder 12 is 30mm-60mm. By keeping the distance between the inner wall of the protective sleeve 22 and the outer wall of the rotating cylinder 12 at 30mm-60mm, the water sprayed from the rotating cylinder 12 can enter the slow mixing tank 50 from the bottom of the protective sleeve 22 under the action of the protective sleeve 22, preventing the water from scattering outside the slow mixing tank 50.

[0039] See Figures 1-4 The system also includes a first bearing 20 and a second bearing 21. Two mounting grooves are provided on the inner sidewall of the upper end of the protective cylinder 22. The outer rings of both the first bearing 20 and the second bearing 21 are installed in their respective mounting grooves, and their inner rings are interference-fitted with the upper end of the rotating cylinder 12. By installing the first bearing 20 and the second bearing 21 on the upper end of the rotating cylinder 12, the rotating cylinder 12 is rotatably connected to the inner cavity of the protective cylinder 22. Both the first bearing 20 and the second bearing 21 can be made of polytetrafluoroethylene or other corrosion-resistant materials to prevent water from causing bearing corrosion. Specifically, both the first bearing 20 and the second bearing 21 are sealed bearings to prevent water mist or other dust from entering the bearing interior. No spray holes 13 are provided on the sidewall of the rotating cylinder 12 where the first bearing 20 and the second bearing 21 are installed, nor on its upper end.

[0040] See Figures 1-4The stirring unit includes a mounting shaft 11 and several stirring blades 10. The upper end of the mounting shaft 11 is connected to the outer bottom of the rotating drum 12, and the stirring blades 10 are evenly distributed and connected to the free end of the mounting shaft. In the working state, the lower end of the mounting shaft 11 and the stirring blades 10 are both located in the wastewater of the slow mixing tank 50. By setting the mounting shaft 11 and stirring blades 10, it is convenient for the stirring blades 10 to extend into the wastewater and stir the flocculant under the action of the rotating drum 12.

[0041] See Figures 1-4 The protective sleeve 22 is coaxial with the rotating drum 12. By making the protective sleeve 22 coaxial with the rotating drum 12, interference between the rotating drum 12 and the protective sleeve 22 is prevented.

[0042] See Figure 1 It also includes a mounting bracket 40 and a base 41. The base 41 is installed on the ground outside the slow mixing tank 50. The mounting bracket 40 is L-shaped, with one end extending into the upper part of the slow mixing tank 50 and fixedly connected to the outside of the protective cylinder 22, and the other end connected to the base 41. By setting the bracket and base 41, the protective cylinder 22, the rotating cylinder 12, and the stirring part are supported and positioned, so that the rotating cylinder 12 is vertically installed above the slow mixing tank 50.

[0043] See Figure 5 The nozzle 13 is generally arc-shaped, so that the component of the reaction force of the water sprayed from the nozzle 13 outlet is tangent to the axis of the rotating drum 12, and all nozzles 13 are arranged in a clockwise direction or in a counterclockwise direction to realize the rotation of the rotating drum 12.

[0044] Specifically, the diameter of the rotating drum 12 can be set according to the actual required stirring speed. The larger the diameter of the rotating drum 12, the greater the torque generated around the axis of the rotating drum 12, which in turn makes the rotation speed of the rotating drum 12 greater. In addition, the greater the water pressure, the greater the reaction force of the water sprayed out, and the greater the rotation speed of the rotating drum 12.

[0045] In this invention, "reclaimed water" refers to non-potable water that has been treated by a sewage treatment plant to meet specific water quality standards and can be reused within a certain range.

[0046] Furthermore, tap water can also be used in the rotating drum 12, and the rotating drum 12 can be rotated by the pressure of the tap water and the reaction force when the water is sprayed from the nozzle 13.

[0047] The stirring blade in this invention has an inclination and an amplitude, which is the same as the structure of a conventional stirring blade. The specific structure of the stirring blade will not be described in detail in this invention.

[0048] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A slow-mixing zone stirrer, characterized in that, include: A protective casing, wherein both the top and bottom of the protective casing are open; A rotating drum is rotatably connected to the inner cavity of the protective cylinder. Several spray holes are provided on the side wall of the rotating drum. The top of the rotating drum is rotatably and sealingly connected to the outlet end of the middle water pipe. In the working state, the component of the reaction force of the water sprayed from each spray hole is tangent to the axis of the rotating drum. A stirring section is connected to the bottom outer side of the rotating drum.

2. The slow mixing zone stirrer according to claim 1, characterized in that, The rotating drum is cylindrical and is installed vertically above the slow mixing tank.

3. The slow-mixing zone stirrer according to claim 1, characterized in that, The nozzle has a circular cross-section.

4. The slow mixing zone stirrer according to claim 1, characterized in that, The nozzles are evenly distributed along the outer side wall of the rotating cylinder.

5. The slow mixing zone stirrer according to claim 1, characterized in that, It also includes a high-speed rotary joint, the two ends of which are respectively sealed to the outlet end of the medium water pipe and the top of the rotating drum.

6. The slow mixing zone stirrer according to claim 1, characterized in that, The protective sleeve is cylindrical, and the distance between the inner wall of the protective sleeve and the outer wall of the rotating cylinder is 30mm-60mm.

7. The slow mixing zone stirrer according to claim 1, characterized in that, It also includes a first bearing and a second bearing. Two mounting grooves are provided on the inner side wall of the upper end of the protective cylinder. The outer rings of the first bearing and the second bearing are installed in the corresponding mounting grooves, and the inner rings are both interference-fitted with the upper end of the rotating cylinder.

8. The slow mixing zone stirrer according to any one of claims 1-7, characterized in that, The stirring unit includes a mounting shaft and several stirring blades. The upper end of the mounting shaft is connected to the outer side of the bottom of the rotating drum, and the several stirring blades are evenly distributed and connected to the free end of the mounting shaft. In the working state, the lower end of the mounting shaft and the stirring blades are both located in the sewage in the slow mixing tank.

9. The slow-mixing zone stirrer according to any one of claims 1-7, characterized in that, The nozzle is an arc-shaped hole.

10. The slow mixing zone stirrer according to claim 9, characterized in that, It also includes a mounting bracket and a base. The base is installed on the ground outside the slow mixing tank. The mounting bracket is L-shaped and has one end extending into the top of the slow mixing tank and fixedly connected to the outside of the protective casing. The other end is connected to the base.

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