Coagulation reaction circulating stirring device and method based on fluid lifting and conveying

Abstract

The invention discloses a coagulation reaction circulation stirring device and method based on fluid lifting and conveying, the coagulation reaction circulation stirring device comprises a driving mechanism, a transmission shaft and a stirring part mounted on the transmission shaft, and the stirring part comprises a lower spiral conveying part and an upper dispersion stirring part; the lower spiral conveying part is fixedly arranged on the lower section of the transmission shaft in a sleeving manner and is a spiral cylinder, and the spiral cylinder is provided with an axial through internal flow channel; when the lower spiral conveying part rotates, the fluid and the medium at the bottom of the coagulating basin are lifted and conveyed upwards through the internal flow channel; and the upper dispersing and stirring part is positioned at the upper section of the transmission shaft, is positioned above the lower spiral conveying part, and is used for enabling the fluid to generate radial and circumferential movement during rotation so as to stir the fluid and the medium lifted by the lower spiral conveying part and enable the fluid and the medium to be dispersed all around. Internal flow lifting is achieved through the lower spiral conveying part, radial dispersion matching is achieved through the upper dispersion stirring part, a three-dimensional circulation flow field is constructed, and the problems that materials are not evenly mixed and dead angles exist in the coagulation reaction are solved.

Description

Technical Field

[0001] This invention belongs to the technical field of water treatment equipment, and particularly relates to a coagulation reaction circulation stirring device and method based on fluid lifting and conveying. Background Technology

[0002] In coagulation wastewater treatment processes, the primary function of the agitator is to ensure rapid and uniform contact and mixing of chemicals, magnetic media, and water impurities. Current technologies generally employ a single agitator with motor-driven shaft-end blades, which primarily creates a single circumferential vortex flow field within the tank. This flow field has significant drawbacks: the velocity gradient between the vortex center and edge leads to uneven mixing; its streamlines are mainly concentrated on the horizontal plane, resulting in insufficient driving force for vertical mass exchange. This causes denser magnetic media and heavy suspended solids to easily settle at the bottom of the tank, making it difficult for them to be effectively entrained into the mainstream reaction zone, while lighter impurities in the upper layer also fail to settle effectively, forming vertical mixing dead zones. Simultaneously, fluid exchange is weak at the tank edges and corners, creating horizontal mixing dead zones. The existence of these dead zones reduces reaction efficiency, prolongs coagulation time, and affects the overall treatment effect and stability. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the existing technology, the present invention provides a coagulation reaction circulating stirring device and method based on fluid lifting and conveying. The lower spiral conveying part realizes the internal flow lifting and the upper dispersing stirring part realizes the radial dispersion, thereby constructing a three-dimensional circulating flow field to solve the problems of uneven material mixing and dead corners in the coagulation reaction.

[0004] Technical solution: To achieve the above objectives, the present invention provides a coagulation reaction circulating stirring device based on fluid lifting and conveying, comprising a drive mechanism, a transmission shaft, and a stirring component mounted on the transmission shaft, wherein the stirring component comprises a lower spiral conveying part and an upper dispersing and stirring part;

[0005] The lower screw conveyor is fixedly mounted on the lower section of the drive shaft. When the lower screw conveyor rotates, it can lift and convey the fluid and medium at the bottom of the coagulation tank upwards.

[0006] The upper dispersing and stirring section is located on the upper section of the drive shaft and above the lower spiral conveying section. It is used to generate radial and circumferential motion of the fluid when rotating, so as to agitate the fluid and medium lifted by the lower spiral conveying section and disperse it in all directions.

[0007] Furthermore, the lower spiral conveying part is a spiral groove with an open flow channel that is axially connected and open at the top; when the lower spiral conveying part rotates, it lifts and conveys the fluid and medium at the bottom of the coagulation tank upward through the open flow channel.

[0008] Furthermore, the lower spiral conveying part is a spiral cylinder with an axially through internal flow channel; when the lower spiral conveying part rotates, it lifts and conveys the fluid and medium at the bottom of the coagulation tank upward through the internal flow channel.

[0009] Furthermore, the inner surface of the spiral cylinder is formed with a continuous inner spiral surface to drive the fluid in the internal flow channel.

[0010] Furthermore, when the upper dispersing and stirring unit is installed, its working area corresponds to the upper and middle water body of the coagulation tank;

[0011] When installed, the lower spiral conveyor has its feed end corresponding to the bottom sedimentation area of ​​the coagulation tank, and its discharge end pointing towards the working area of ​​the upper dispersing and stirring unit.

[0012] Furthermore, the upper dispersing and stirring section includes at least one set of stirring blades, the installation angle of which is adjustable relative to the axial direction of the drive shaft.

[0013] Furthermore, the stirring blades are arranged in a downward tilted posture from the root to the head when installed.

[0014] Furthermore, it includes an adjustable connecting member, through which the stirring blades are installed with an adjustable angle relative to the drive shaft.

[0015] Furthermore, the lower spiral conveyor has a mounting frame, and the lower spiral conveyor is mounted on the drive shaft via the mounting frame and several detachable connectors.

[0016] A circulating stirring method for a coagulation reaction circulating stirring device based on fluid lifting and conveying includes the following steps:

[0017] Step S1: Start the drive mechanism to drive the transmission shaft and the lower spiral conveyor and upper dispersing and stirring part fixed on it to rotate synchronously;

[0018] Step S2: Using the screw drum of the lowered screw conveyor, the internal flow channel through which the internal flow is axially connected forms an internal flow lifting effect, stably lifting and conveying the fluid and medium at the bottom of the coagulation tank upward;

[0019] Step S3: Using the upper dispersing and stirring section, the fluid and medium transported to the upper part by the lower spiral conveying section through the internal flow lifting action are stirred, and strong radial and circumferential motion is generated, thereby achieving dispersion to the surrounding area of ​​the coagulation tank.

[0020] Step S4: By continuously performing the internal flow lifting in step S2 and the radial dispersion in step S3, a three-dimensional circulating flow field is formed in the coagulation tank, spreading from the bottom of the tank to the top and then outwards, so that the media and fluids of different densities and positions in the tank can be fully and uniformly mixed.

[0021] Beneficial Effects: This invention alters the flow field structure within the coagulation tank, transforming it from a single vortex into a three-dimensional forced circulation system consisting of axial lifting from the bottom and radial diffusion from the top. Streamlines are distributed throughout the entire tank volume, effectively eliminating mixing dead zones at the bottom, corners, and edges. The inner spiral surface of the spiral barrel provides directional and stable suction and lifting of the bottom sediments, overcoming the sedimentation tendency of heavy media due to density differences and ensuring that all materials are entrained in the circulation. The radial dispersion effect of the upper stirring blades on the lifting fluid promotes rapid and uniform mixing of the lifting medium with the main flow field within the tank. This achieves a three-dimensional circulating flow field constructed through the combination of internal flow lifting from the spiral barrel and radial dispersion by the upper stirring blades, thus solving the problems of uneven material mixing and dead zones in the coagulation reaction. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention, in an embodiment where the lower spiral conveying part is a spiral cylinder.

[0023] Figure 2 This is a schematic diagram of an embodiment where the lower spiral conveyor section is a spiral groove.

[0024] Figure 3 A schematic diagram of a structure for lifting and transporting fluid and media from the bottom of a coagulation tank upwards and then dispersing them in all directions;

[0025] Figure 4 for Figure 1 Enlarged structural diagram of region A in the middle;

[0026] Figure 5 for Figure 1 A magnified schematic diagram of the structure of region B in the middle. Detailed Implementation

[0027] The invention will now be further described with reference to the accompanying drawings.

[0028] like Figure 1As shown, a coagulation reaction circulation stirring device based on fluid lifting and conveying includes a drive mechanism 1, a transmission shaft 2, and stirring components mounted on the transmission shaft 2. The stirring components include a lower spiral conveying section 4 and an upper dispersion stirring section 3. The lower spiral conveying section 4 is mainly responsible for vertical axial material conveying, while the upper dispersion stirring section 3 is mainly responsible for horizontal radial diffusion and mixing. These two components are not independent but share the same transmission shaft 2, forming synchronized rotation speeds and complementary functions. This differs from traditional mixers that rely on a single blade to generate a single vortex flow field. By setting up upper and lower stirring zones and interrelation of their movements, the device actively guides the fluid within the coagulation tank 9 along a path of axial ascent from the bottom, radial diffusion from the top, and settling and recirculation from the periphery. This achieves three-dimensional circulation throughout the entire tank, solving the problems of a single flow field and large mixing dead zones in traditional stirring methods. It ensures that low-velocity areas such as the bottom sedimentation zone and corner areas of the tank can be effectively circulated, significantly expanding the effective stirring range.

[0029] The lower spiral conveyor 4 is fixedly mounted on the lower section of the drive shaft 2. When the lower spiral conveyor 4 rotates, it can lift and convey the fluid and medium at the bottom of the coagulation tank 9 upwards. In this invention, the lower spiral conveyor 4 has two embodiments, as follows:

[0030] Example 1: As Figure 2 As shown, the lower spiral conveying part 4 is a spiral groove with an open flow channel 40 that runs axially through and is open at the top. When the lower spiral conveying part 4 rotates, it lifts and conveys the fluid and medium at the bottom of the coagulation tank 9 upward through the open flow channel 40. The open flow channel 40 has an anti-clogging effect while lifting and conveying the fluid and medium.

[0031] Example 2: Figure 1 and Figure 5As shown, the lower spiral conveying section 4 is a spiral cylinder with an axially penetrating internal flow channel 42. When the lower spiral conveying section 4 rotates, it lifts and conveys the fluid and medium at the bottom of the coagulation tank 9 upward through the internal flow channel 42. The lower spiral conveying section 4 adopts a hollow spiral cylinder structure, and its internal flow channel 42 forms a relatively independent conveying channel. When the spiral cylinder rotates, the lifting force it generates mainly acts on the fluid in the flow channel, forming a highly efficient pipeline conveying. The rotating inner spiral surface applies a resultant force along the spiral angle direction to the fluid in contact with it. This resultant force can be decomposed into a tangential component that drives the fluid to rotate and an axial component that pushes the fluid to move along the cylinder axis. The existence of the internal flow channel 42 constrains the direction of fluid movement, reduces energy loss caused by eddies and radial diffusion, and makes axial lifting the dominant force, thereby achieving highly efficient lifting of materials at the bottom of the tank, especially magnetic media and heavy flocs with a density greater than water. The pipeline conveying efficiency of the spiral cylinder is higher, the energy is more concentrated, and it can effectively overcome the settling tendency of heavy materials, ensuring that they are forcibly lifted to the upper part of the tank to participate in the reaction.

[0032] In Embodiment 1, the flow channel is an open flow channel 40, which is more suitable for working conditions with a large amount of solid material. Based on the open structure, blockage of the lower spiral conveying section 4 can be avoided. In Embodiment 2, the flow channel is a closed internal flow channel 42, which is more suitable for situations with less solid material. Based on the closed structure, the conveying efficiency can be improved.

[0033] The upper dispersing and stirring section 3 is located above the upper section of the drive shaft 2 and above the lower spiral conveying section 4. It is used to generate radial and circumferential motion in the fluid during rotation, agitating the fluid and medium lifted by the lower spiral conveying section 4 and dispersing it in all directions. The upper dispersing and stirring section 3 is located above the discharge port of the spiral drum, and its main function is to process the high-concentration medium flow conveyed from below. Through strong radial and circumferential shearing action, this upward flow is dispersed and integrated into the main flow field of the tank. That is, when the blades rotate, they push the fluid outward (radial flow) and simultaneously drive the fluid to rotate around the axis (circumferential flow). The combination of these two flows forms a strong turbulent diffusion zone. Therefore, the medium concentrated from the spiral drum is quickly dispersed into a larger horizontal cross-section, avoiding local accumulation of the medium. Moreover, the generated radial flow can push the fluid towards the tank wall, while the circumferential flow promotes horizontal mixing throughout the tank.

[0034] like Figure 3As shown, for ease of description, the upward lifting and conveying of fluid and medium by the spiral drum is defined as the inner spiral lifting flow 100, and the dispersion of the lifted fluid and medium by the upper dispersing and stirring section 3 is defined as the upper rotating dispersion flow 200. First, the more important innovation of the inner spiral lifting flow 100 lies in the inner lifting, rather than the outer lifting. The inner lifting can avoid collisions between the inner medium (the medium being lifted and conveyed inside the spiral drum) and the outer medium (the medium being gravity-depressed outside the spiral drum), avoiding motion interference between the two, thus ensuring smoother and more efficient lifting and conveying. When the inner spiral lifting flow 100 reaches the effective range of the upper rotating dispersion flow 200, they will converge and mix, thus forming a more reliable, stable, and smooth three-dimensional circulation.

[0035] like Figure 5 As shown, a preferred embodiment for achieving efficient internal flow lifting is as follows: the inner surface of the cylinder 41 of the spiral cylinder is formed with a continuous inner spiral surface 43 to drive the fluid in the internal flow channel 42. The inner spiral surface 43 is directly machined or connected to the inner wall of the cylinder 41, so that the rotational power acts directly on the fluid core inside the flow channel 42. When the inner spiral surface rotates, it transfers angular momentum to the fluid layer closely attached to the wall through viscous friction, and the fluid layer then drives the overall movement of the internal fluid through internal friction.

[0036] As a preferred installation method, such as Figure 1 As shown, in its installed state, the upper dispersing and stirring unit 3 corresponds to the upper and middle water body of the coagulation tank 9; in its installed state, the lower spiral conveyor unit 4 has its inlet end corresponding to the bottom sedimentation area of ​​the coagulation tank 9, and its outlet end pointing towards the working area of ​​the upper dispersing and stirring unit 3. This ensures that the inlet of the lower spiral conveyor unit 4 can draw in the bottom sediment to the maximum extent, while its outlet corresponds to the upper and lower working areas of the upper dispersing and stirring unit 3, ensuring that the lifted material can be captured and dispersed immediately, avoiding dissipation of the lifted flow during the transmission process, and making the three-dimensional circulation process more reliable.

[0037] like Figure 1 As shown, the upper dispersion and stirring section 3 includes at least one set of stirring blades 31, and the installation angle of the stirring blades 31 is adjustable relative to the axial direction of the drive shaft 2. The upper dispersion and stirring section 3 uses angle-adjustable blades, which improves the ability to regulate the upper flow field and enhances the adaptability to operating conditions.

[0038] As a preferred blade mounting orientation, such as Figure 1As shown, the stirring blades 31 are arranged in a downward-sloping posture from the root to the head in the installed state. That is, the blades are neither perpendicular to the axis nor horizontal, but their front end (head) is lower in the axial direction than their rear end (root). When the downward-sloping blades rotate, in addition to generating the main radial centrifugal force, they also exert a downward axial component force on the fluid. This not only enhances the three-dimensional circulation, but also creates strong fluid shearing and counter-current in the area between the spiral barrel outlet and the blade root. This is beneficial for breaking up and diluting the high-concentration medium clumps that are lifted up, and entraining them into the upper main circulation.

[0039] like Figure 1 As shown, the present invention includes an adjustable connecting member 5, through which the stirring blade 31 is connected and installed at an adjustable angle relative to the drive shaft 2. The present invention provides a specific embodiment of the adjustable connecting member 5, as follows: Figure 4 As shown, the adjustable connecting component 5 includes a hinge seat 51, a hinge shaft 52, and a bolt and nut assembly 54. The hinge seat 51 is connected to the drive shaft 2. The stirring blade 31 is hinged to the hinge seat 51 through the hinge shaft 52. The hinge seat 51 has a plurality of positioning holes 53 arranged in a circular array around the hinge shaft 52. After the stirring blade 31 is adjusted to the correct angle, it is fixed by the bolt and nut assembly 54 engaging with the corresponding positioning holes 53.

[0040] like Figure 1 As shown, the lower spiral conveyor 4 has a mounting frame 6, and the lower spiral conveyor 4 is mounted on the drive shaft 2 via the mounting frame 6 and several detachable connecting parts 7. The present invention provides a specific embodiment of the mounting frame 6, as follows: Figure 5 As shown, the mounting bracket 6 includes a sleeve 61 and a connecting rod 62. The detachable connector 7 is preferably a pin. The lower spiral conveyor 4 is connected to the sleeve 61 via the connecting rod 62. The sleeve 61 is coaxially fitted onto the drive shaft 2 and fixed by inserting the pin into a pin hole on the drive shaft 2, thereby achieving the installation of the lower spiral conveyor 4. This facilitates disassembly and assembly when the lower spiral conveyor 4 is worn or needs to be replaced with different sizes and specifications according to different processing scales.

[0041] More specifically, the drive mechanism 1 is a motor. In the coagulation process, rapid initial mixing requires high speed, while the subsequent floc growth stage requires low speed. Therefore, a speed change mechanism 8 for adjusting the speed is provided between the motor and the transmission shaft 2. The speed change mechanism 8 can be a mechanical gearbox or the like.

[0042] The stirring device of the present invention has a vertical installation structure, with the drive shaft 2 set vertically; the drive mechanism 1 is fixed above the coagulation tank 9 by a frame, and the lower end of the drive shaft 2 extends into the coagulation tank 9.

[0043] The coagulation reaction circulating stirring device of this invention constructs a three-dimensional circulating flow field through the combination of internal flow lifting in the spiral cylinder and radial dispersion by the upper stirring blades, thus solving the problems of uneven material mixing and dead zones in the coagulation reaction. It changes the flow field structure within the tank from a single vortex to a three-dimensional forced circulation consisting of bottom axial lifting and upper radial diffusion, with streamlines covering the entire tank volume, effectively eliminating mixing dead zones at the bottom, corners, and edges. The inner spiral surface of the spiral cylinder generates a directional and stable suction and lifting effect on the bottom sediments, overcoming the sedimentation tendency of heavy media due to density differences, ensuring that all materials are entrained in the circulation. The radial dispersion effect of the upper stirring blades on the lifting fluid promotes rapid and uniform mixing of the lifting medium with the main flow field within the tank.

[0044] A circulating stirring method for a coagulation reaction circulating stirring device based on fluid lifting and conveying includes the following steps:

[0045] Step S1: Start the drive mechanism 1, drive the transmission shaft 2 and the lower spiral conveying part 4 and the upper dispersing and stirring part 3 fixed on it to rotate synchronously.

[0046] Step S2: Using the spiral drum of the lowered spiral conveyor 4, an internal flow lifting effect is formed through its axially penetrating internal flow channel 42, which stably lifts and transports the fluid and medium at the bottom of the coagulation tank 9 upward.

[0047] Step S3: The upper dispersing and stirring part 3 is used to stir the fluid and medium that are conveyed to the upper part by the lower spiral conveying part 4 through the internal flow lifting action, and make it generate strong radial and circumferential motion, thereby realizing the dispersion to the surrounding area of ​​the coagulation tank 9.

[0048] Step S4: By continuously performing the internal flow lifting in step S2 and the radial dispersion in step S3, a three-dimensional circulating flow field is formed in the coagulation tank 10, which spreads from the bottom of the tank to the top and then to the surrounding areas, so that the media and fluids of different densities and positions in the tank can be fully and uniformly mixed.

[0049] The circulating stirring method of the present invention can completely eliminate the mixing dead zones in the coagulation tank, ensure that the heavy medium at the bottom of the tank is continuously drawn in and participates in the circulation, ensure that the light impurities are drawn in and diffuse downwards, and ensure that the fluid at the edge of the tank is continuously pulled back to the mainstream area, ultimately achieving rapid contact, uniform mixing and full reaction of the reagents, magnetic media and pollutants, and ensuring high coagulation efficiency.

[0050] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A coagulation reaction circulating stirring device based on fluid lifting and conveying, comprising a drive mechanism (1), a transmission shaft (2), and a stirring component mounted on the transmission shaft (2), characterized in that: The stirring component includes a lower spiral conveying part (4) and an upper dispersing and stirring part (3); The lower spiral conveyor (4) is fixedly mounted on the lower section of the drive shaft (2). When the lower spiral conveyor (4) rotates, it can lift and convey the fluid and medium at the bottom of the coagulation tank (9) upward. The upper dispersing and stirring part (3) is located on the upper section of the transmission shaft (2) and above the lower spiral conveying part (4). It is used to make the fluid generate radial and circumferential motion when rotating, so as to stir the fluid and medium lifted by the lower spiral conveying part (4) and disperse it in all directions.

2. The coagulation reaction circulating stirring device based on fluid lifting and conveying according to claim 1, characterized in that: The lower spiral conveying part (4) is a spiral groove with an open flow channel (40) that is axially connected and open at the top. When the lower spiral conveying part (4) rotates, it lifts and conveys the fluid and medium at the bottom of the coagulation tank (9) upward through the open flow channel (40).

3. The coagulation reaction circulating stirring device based on fluid lifting and conveying according to claim 1, characterized in that: The lower spiral conveying part (4) is a spiral cylinder with an axially penetrating internal flow channel (42); when the lower spiral conveying part (4) rotates, it lifts and conveys the fluid and medium at the bottom of the coagulation tank (9) upward through the internal flow channel (42).

4. The coagulation reaction circulating stirring device based on fluid lifting and conveying according to claim 3, characterized in that: The inner surface of the cylinder (41) of the spiral cylinder is formed with a continuous inner spiral surface (43) to drive the fluid in the internal flow channel (42).

5. A coagulation reaction circulating stirring device based on fluid lifting and conveying according to claim 1, characterized in that: When the upper dispersing and stirring part (3) is installed, its working area corresponds to the middle and upper water body of the coagulation tank (9); When installed, the lower spiral conveyor (4) has its feed end corresponding to the bottom sedimentation area of ​​the coagulation tank (9) and its discharge end pointing to the working area of ​​the upper dispersing and stirring unit (3).

6. The coagulation reaction circulating stirring device based on fluid lifting and conveying according to claim 1, characterized in that: The upper dispersing and stirring section (3) includes at least one set of stirring blades (31), the installation angle of which is adjustable relative to the axial direction of the drive shaft (2).

7. A coagulation reaction circulating stirring device based on fluid lifting and conveying according to claim 6, characterized in that: The stirring blades (31) are arranged in a downward tilted posture from the root to the head when installed.

8. A coagulation reaction circulating stirring device based on fluid lifting and conveying according to claim 6, characterized in that: Includes an adjustable connecting member (5), the stirring blade (31) is installed with an adjustable angle relative to the drive shaft (2) via the adjustable connecting member (5).

9. A coagulation reaction circulating stirring device based on fluid lifting and conveying according to claim 1, characterized in that: The lower spiral conveyor (4) has a mounting frame (6), and the lower spiral conveyor (4) is mounted on the drive shaft (2) through the mounting frame (6) and several detachable connectors (7).

10. The circulating stirring method of a coagulation reaction circulating stirring device based on fluid lifting and conveying according to claim 3, characterized in that: Includes the following steps: Step S1: Start the drive mechanism (1) to drive the transmission shaft (2) and the lower spiral conveying part (4) and the upper dispersing and stirring part (3) fixed thereon to rotate synchronously; Step S2: Using the spiral drum of the lowered spiral conveyor (4), the internal flow channel (42) through which the internal flow is axially connected forms an internal flow lifting effect, and the fluid and medium at the bottom of the coagulation tank (9) are stably lifted and transported upward. Step S3: Using the upper dispersing and stirring part (3), the fluid and medium transported to the upper part by the lower spiral conveying part (4) through the internal flow lifting action are stirred, and strong radial and circumferential motion is generated, thereby realizing the dispersion to the surrounding area of ​​the coagulation tank (9); Step S4: By continuously performing the internal flow lifting in step S2 and the radial dispersion in step S3, a three-dimensional circulating flow field is formed in the coagulation tank (10) from the bottom of the tank to the top of the tank and then diffuses to the surrounding areas, so that the media and fluids of different densities and positions in the tank can be fully and uniformly mixed.

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