An integrated sewage treatment method

Abstract

The present invention provides an integrated sewage treatment method, including: Step 10, adding a coagulant aid into a chemical dosing container, the coagulant aid enters the inner cavity of a transmission shaft through a chemical inlet hole, and then enters a flocculation tank through a chemical outlet hole; Step 20, a driving member drives the transmission shaft to rotate, driving the chemical dosing container, upper blades, lower blades and an impeller assembly to rotate; Step 30, the upper blades and the lower blades rotate to respectively generate rotating fluids moving upward and downward centered on the transmission shaft. During the upward and downward movement processes, the rotating fluids are continuously mixed with the coagulant aid ejected outward from the chemical outlet hole, so that the flocs in the fluid continuously grow near the transmission shaft, improving the flocculation effect in the height direction; a small part of the fluid flows tangentially out around the transmission shaft and undergoes a flocculation process in different directions under the action of the impeller assembly, increasing the collision and agglomeration of the flocs in different directions. The integrated sewage treatment method provided by the present invention effectively improves the flocculation effect in the whole space, creating conditions for efficient sedimentation.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and particularly relates to an integrated sewage treatment method. Background Art

[0002] Integrated sewage treatment equipment is widely used in the treatment of urban and rural domestic sewage. Among them, the flocculation process has a great influence on the formation and growth of flocs and the precipitation of subsequent processes. The impeller of the frame-type stirrer in the prior art generates a fluid rotating around the transmission shaft for the flocculation process, but there are the following deficiencies: 1. Since all the blades are vertically arranged on the frame of the same plane, in the height direction, the mutual collision effect of the flocs is poor, affecting the mixing and flocculation effect. 2. The fluid velocities in different radial directions are different, and the flocculation effect near the transmission shaft is weaker than that far from the transmission shaft, so the flocculation effects in different radial directions are unbalanced. 3. The fluid mobility in the vertical and radial directions in the flocculation tank is poor, resulting in unbalanced flocculation effects in the entire space. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: to provide an integrated sewage treatment method, which can effectively improve the flocculation effect in the entire space and create conditions for efficient precipitation.

[0004] To solve the above technical problem, the present invention provides an integrated sewage treatment method, including the following steps:

[0005] Step 10: Add a coagulant aid to the chemical dosing container. The coagulant aid enters the inner cavity of the transmission shaft through the chemical dosing hole and then enters the flocculation tank through the chemical discharging hole;

[0006] Step 20: The driving member drives the transmission shaft to rotate, driving the chemical dosing container, the upper blade, the lower blade and the impeller assembly to rotate;

[0007] Step 30: The upper blade rotates to generate a rotating fluid moving upward centered on the transmission shaft. During the upward movement of the fluid, it continuously mixes with the coagulant aid ejected outward from the chemical discharging hole of the transmission shaft, so that the coagulant aid is fully dissolved in the fluid, and the flocs in the fluid continuously increase near the transmission shaft; the continuously increasing flocs continuously mix and collide with the coagulant aid ejected from the upper chemical discharging hole again during the upward movement following the fluid, so that the flocs continuously grow in the height direction; most of the fluid generated by the upper blade and the coagulant aid are mixed and move upward, and a small part of the fluid flows tangentially outwards around the transmission shaft, generating an annular fluid under the action of the impeller assembly to carry out the flocculation process in different directions, increasing the collision and aggregation of the flocs in different directions;

[0008] The lower blades rotate to generate a rotating fluid moving downward centered on the transmission shaft. During the downward movement of the fluid, it continuously mixes with the flocculant ejected outward from the medicine outlet holes of the transmission shaft, enabling the flocculant to be fully dissolved in the fluid, and causing the flocs in the fluid to continuously grow between the inner blades and the transmission shaft. The continuously growing flocs continuously mix and collide with the flocculant ejected from the lower medicine outlet holes during the downward movement, causing the flocs to continuously grow in the height direction. Most of the fluid generated by the lower blades mixes with the flocculant and then moves downward, while a small part of the fluid flows tangentially outwards around the transmission shaft, generating an annular fluid under the action of the impeller assembly, carrying out the flocculation process in different directions, and increasing the collision and aggregation of the flocs in different directions.

[0009] As a further improvement of the present invention, it further includes:

[0010] Step 40: The auxiliary blades generate a radial fluid below the liquid level, stirring and mixing the fluid containing flocs and flocculant, causing the flocs to continuously mix, collide and aggregate within the rotation radius of the auxiliary blades, accelerating the growth process of the flocs; at the same time, preventing the fluid from floating, causing the upward fluid to change direction and move around, colliding with the surrounding fluid again, and causing the flocs to continuously aggregate and grow.

[0011] As a further improvement of the present invention, it further includes:

[0012] Step 50: The inner blades rotate to generate a double-horn-shaped inner annular fluid rotating around the transmission shaft, which is symmetric above and below the interface.

[0013] Above the interface, the inner circle of the inner annular fluid mixes and collides with the fluid near the inner circle, causing the flocs in different motion states to collide and aggregate with each other, accelerating the growth of the flocs. The radial aggregation effect of the flocs in the entire circumferential direction gradually increases from bottom to top; the gradually aggregating and growing flocs continuously collide and mix with the flocs formed by the flocculant ejected outward from the medicine outlet holes of the transmission shaft and the surrounding water body under the action of the upper blades, causing the flocs to become larger again; the fluid at the uppermost end mixes and squeezes with the radial fluid formed by the auxiliary blades, causing the flocs to aggregate and grow again; the outer circle of the inner annular fluid mixes and collides with the fluid near the outer circle, causing the flocs in different motion states to collide and aggregate with each other, accelerating the growth of the flocs. The radial aggregation effect of the flocs in the entire circumference gradually increases from bottom to top.

[0014] Below the interface, the inner ring of the inner annular fluid mixes and collides with the fluid near the inner ring, causing flocs in different motion states to collide and agglomerate with each other, accelerating the growth of the flocs. The radial agglomeration effect of the flocs around the entire circumference gradually increases from top to bottom; the gradually agglomerating and growing flocs continuously collide and mix with the flocs formed by the coagulant aid ejected from the medicine outlet holes of the transmission shaft and the surrounding water body, making the flocs grow larger again; the fluid at the lowermost end mixes and squeezes with the fluid at the bottom of the pool, making the flocs agglomerate and grow larger again; the outer ring of the inner annular fluid mixes and collides with the fluid near the outer ring, causing flocs in different motion states to collide and agglomerate with each other, accelerating the growth of the flocs. The radial agglomeration effect of the flocs around the entire circumference gradually increases from top to bottom; the fluid at the lowermost end mixes and squeezes with the fluid at the bottom of the pool, making the flocs agglomerate and grow larger again.

[0015] As a further improvement of the present invention, it further includes:

[0016] Step 60, the outer blades rotate to generate a waist-shaped outer annular fluid that rotates around the transmission shaft and is symmetric above and below the interface;

[0017] Above the interface, the inner ring of the outer annular fluid mixes and collides with the outer ring of the inner annular fluid formed by the inner blades, and the mixed fluid after acting on the fluid near the outer ring of the inner annular fluid, causing flocs in two different motion states to collide and agglomerate with each other, accelerating the growth of the flocs; the fluid on the upper end face mixes and squeezes with the fluid near the liquid surface, making the flocs agglomerate and grow larger again; the outer ring of the outer annular fluid mixes and collides with the fluid near the outer ring, causing flocs in different motion states to collide and agglomerate with each other, accelerating the growth of the flocs. The radial agglomeration effect of the flocs around the entire circumference gradually increases from top to bottom; since the distance between the outer blades and the pool wall gradually increases from bottom to top, and at the same time the tangential velocity of the fluid gradually decreases, the collision and mixing effects of the flocs from bottom to top are different, causing the upward-moving fluid to deflect inwards and continuously mix with the fluid above during the movement, accelerating the agglomeration process of the flocs; the mixed fluid moves upward to near the liquid surface and then moves towards the transmission shaft direction, colliding and mixing with the fluid near the liquid surface, further making the flocs agglomerate;

[0018] Below the interface, the inner ring of the outer annular fluid, the outer ring of the inner annular fluid formed by the inner blades, and the mixed fluid after acting on the fluid near the outer ring of the inner annular fluid are mixed and collided with each other, causing the flocs in two different motion states to collide and agglomerate with each other, accelerating the growth of the flocs; the fluid on the lower end face is mixed and squeezed with the fluid at the bottom of the tank, causing the flocs to agglomerate and increase again; the outer ring of the outer annular fluid is mixed and collided with the fluid near the outer ring, causing the flocs in different motion states to collide and agglomerate with each other, accelerating the growth of the flocs, and the radial agglomeration effect of the flocs on the entire circumference gradually decreases from top to bottom; since the distance between the outer blades and the tank wall gradually increases from top to bottom, and the tangential velocity of the fluid gradually decreases, the collision and mixing effects of the flocs from bottom to top are different, causing the downward moving fluid to deflect inward. During the movement, it is continuously mixed with the fluid below, accelerating the agglomeration process of the flocs; the mixed fluid moves downward to the bottom of the tank and moves towards the transmission shaft, colliding and mixing with the fluid at the bottom of the tank, further causing the flocs to agglomerate.

[0019] As a further improvement of the present invention, it further includes:

[0020] Step 70, the fluid above the impeller assembly changes direction under the action of the upper auxiliary blades and moves downward between the inner blades and the outer blades; the fluid below the impeller assembly changes direction under the action of the lower auxiliary blades and moves upward between the inner blades and the outer blades; the downward moving fluid collides and mixes with the upward moving fluid near the interface, causing the flocs to continuously increase; the fluid above and below the interface is mixed three-dimensionally in the axial and radial directions simultaneously to achieve the spatial flocculation effect. After re-mixing, a new mixed fluid is formed, causing the fluid above and below the interface to continuously change positions, and under the combined action of the inner blades and the outer blades, repeating the movement and agglomeration process of the flocs, accelerating the sedimentation effect.

[0021] An integrated sewage treatment method provided by the present invention generates rotational fluids moving upward and downward around the transmission shaft by setting upper blades and lower blades. During the upward and downward movement of the fluids, they are continuously mixed with the coagulant sprayed out from the chemical outlet holes of the transmission shaft, enabling the coagulant to be fully dissolved in the fluids, and causing the flocs in the fluids to continuously grow near the transmission shaft. Moreover, the continuously growing flocs follow the upward and downward movement of the fluids and are continuously remixed and collided with the coagulant sprayed out from the upstream chemical outlet holes, causing the flocs to continuously grow in the height direction, thereby improving the flocculation effect in the height direction. Most of the fluids generated by the upper blades and lower blades are mixed with the coagulant and then move upward and downward respectively, and a small part of the fluids flow tangentially outwards around the transmission shaft to generate an annular fluid under the action of the impeller assembly, carrying out flocculation processes in different directions and increasing the collision and agglomeration of the flocs in different directions. By vertically arranging arc-shaped inner blades and outer blades, the inner blades generate a double-horn-shaped inner annular fluid, and the outer blades generate a waist-drum-shaped outer annular fluid, thereby realizing the continuous collision and growth of the flocs in the radial and height directions in the entire circumferential direction, continuously accelerating the agglomeration of the flocs, and improving the rapid and efficient precipitation of impurities. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 FIG. is a schematic structural diagram of a flocculation device of an integrated sewage treatment equipment adopted in the method of the embodiment of the present invention;

[0023] Figure 2 is Figure 1 a schematic structural diagram of the impeller assembly in FIG.

[0024] In the figure: driving member 1, transmission shaft 2, chemical outlet hole 21, upper blade 3, lower blade 4, impeller assembly 5, lower ring 51, lower auxiliary blade 511, upper ring 52, upper auxiliary blade 521, outer blade 53, inner blade 54, bearing 6, chemical addition container 7, auxiliary blade 71. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The technical solution of the present invention will be described in detail below with reference to the drawings.

[0026] The embodiment of the present invention provides an integrated sewage treatment method, which adopts an integrated sewage treatment equipment including a flocculation device, and the flocculation device is installed in a flocculation tank. As Figure 1 shown, the flocculation device includes a driving member 1, a hollow transmission shaft 2, a chemical addition container 7 and an impeller assembly 5. The driving member 1 is fixed at the top end of the flocculation tank body, the driving member 1 is connected to the top end of the transmission shaft 2, and the bottom end of the transmission shaft 2 is connected to the bottom end of the flocculation tank body through a bearing 6. The chemical addition container 7 and the impeller assembly 5 are both installed on the transmission shaft 2, and the chemical addition container 7 is located above the impeller assembly 5.

[0027] The chemical dosing container 7 is a thin-walled cylinder with an open upper end, used to contain the coagulant aid. The chemical dosing container 7 is coaxially arranged with the transmission shaft 2 and rotates synchronously with the transmission shaft. A number of medicine inlet holes are provided on the circumferential wall of the shaft of the transmission shaft located inside the chemical dosing container 7, and the inner cavities of the chemical dosing container and the transmission shaft 2 are communicated through the medicine inlet holes. A number of medicine outlet holes 21 are provided on the circumferential wall of the shaft of the transmission shaft located inside the impeller assembly.

[0028] In the middle of the transmission shaft 2, an upper blade 3 and a lower blade 4 are horizontally provided. The bottom end of the upper blade 3 is connected to the top end of the lower blade 4. The upper blade 3 and the lower blade 4 are located between the inner blade and the transmission shaft. The upper blade 3 is inclined upward, and the lower blade 4 is inclined downward.

[0029] The method of the embodiment of the present invention includes the following steps:

[0030] Step 10: Add the coagulant aid into the chemical dosing container 7. The coagulant aid enters the inner cavity of the transmission shaft 2 through the medicine inlet holes, and then enters the flocculation pool through the medicine outlet holes 21.

[0031] Step 20: The driving member 1 drives the transmission shaft 2 to rotate, driving the chemical dosing container 7, the upper blade 3, the lower blade 4 and the impeller assembly 5 to rotate.

[0032] Step 30: The upper blade 3 rotates to generate a rotating fluid moving upward centered on the transmission shaft. During the upward movement of this fluid, it continuously mixes with the coagulant aid ejected outward from the medicine outlet holes 21 of the transmission shaft, so that the coagulant aid is fully dissolved in the fluid, and the flocs in the fluid continuously increase near the transmission shaft. The continuously increasing flocs continuously mix and collide with the coagulant aid ejected from the upper medicine outlet holes again during the upward movement following the fluid, so that the flocs continuously increase in the height direction. Most of the fluid generated by the upper blade and the coagulant aid mix and then move upward, and a small part of the fluid flows tangentially out around the transmission shaft, generating an inner annular fluid under the action of the inner blade of the impeller assembly, carrying out the flocculation process in different directions, and increasing the collision and agglomeration of the flocs in different directions.

[0033] The lower blade 4 rotates to generate a rotating fluid moving downward centered on the transmission shaft. During the downward movement of this fluid, it continuously mixes with the coagulant aid ejected outward from the medicine outlet holes 21 of the transmission shaft, so that the coagulant aid is fully dissolved in the water body, and the flocs in the water body continuously increase near the transmission shaft. The continuously increasing flocs continuously mix and collide with the coagulant aid ejected from the lower medicine outlet holes again during the downward movement following the fluid, so that the flocs continuously grow in the height direction. Most of the fluid generated by the lower blade and the medicine mix and then move downward, and a small part of the fluid flows tangentially out around the transmission shaft, generating an inner annular fluid under the action of the inner blade of the impeller assembly, carrying out the flocculation process in different directions, and increasing the collision and agglomeration of the flocs in different directions.

[0034] In the above embodiments, by providing the upper blade and the lower blade, the flocs are continuously collided and grown along the height direction of the transmission shaft, so that the flocs are continuously enlarged, creating favorable conditions for the subsequent continuous aggregation of the flocs.

[0035] Preferably, the top end of the chemical addition container 7 is located above the liquid level, and the bottom end is located below the liquid level. A plurality of auxiliary blades 71 are provided at the outer bottom end of the chemical addition container 7. When the transmission shaft rotates, the chemical addition container 7 rotates synchronously with the transmission shaft.

[0036] The method of this embodiment further includes:

[0037] Step 40, the auxiliary blades 71 generate radial fluid below the liquid level, stirring and mixing the fluid containing flocs and coagulant aids, so that the flocs are continuously mixed, collided and aggregated within the rotation radius of the auxiliary blades, accelerating the growth process of the flocs. At the same time, it prevents the fluid from floating up, causing the upward fluid to change direction and move around, colliding with the surrounding fluid again, and continuously aggregating and enlarging the flocs.

[0038] As Figure 2 shown, the impeller assembly 5 includes a lower ring 51 and an upper ring 52 coaxially sleeved on the transmission shaft. The lower ring 51 and the upper ring 52 are arranged at intervals along the axial direction of the transmission shaft. The lower ring 51 is located below the lower blade 4, and the upper ring 52 is located between the upper blade 3 and the bottom end of the chemical addition container. A plurality of blade groups are circumferentially and equally spaced between the lower ring 51 and the upper ring 52, and the number of blade groups is 2 to 4 groups. Each blade group includes an inner blade 54 and an outer blade 53 arranged at intervals in the radial direction. The inner blade and the outer blade are located in the same radial plane. The inner blade 54 is a plate-like structure with two arc-shaped edges protruding towards the transmission shaft, and the outer blade 53 is a plate-like structure with two arc-shaped edges protruding away from the transmission shaft.

[0039] Preferably, the impeller assembly 5 is an axially symmetric structure. The axial symmetry plane of the impeller assembly 5 is used as the dividing surface. The upper blade 3 is located above the dividing surface, and the lower blade 4 is located below the dividing surface.

[0040] The method of this embodiment further includes:

[0041] Step 50, the inner blade 54 rotates to generate a double trumpet-shaped inner annular fluid rotating around the transmission shaft 2, and is symmetric above and below the dividing surface. Above the dividing surface, the trumpet opening faces upward, and below the dividing surface, the trumpet opening faces downward. The outer circle of the inner annular fluid is the outer edge of the inner blade, and the inner circle of the inner annular fluid is the inner edge of the inner blade.

[0042] From the interface plane upwards to the upper end surface of the inner annular fluid, the tangential flow velocities of both the inner and outer circles of the inner annular fluid gradually increase. Inner circle of the inner annular fluid: 1. The fluid in the inner circle of the inner annular fluid and the fluid near the inner circle mix and collide with each other, causing the flocs in different motion states to collide and agglomerate with each other, accelerating the growth of the flocs. The radial agglomeration effect of the flocs over the entire circumference gradually increases from bottom to top. 2. The continuously agglomerating and growing flocs constantly collide and mix with the flocs formed by the coagulant aid ejected from the chemical outlet holes of the transmission shaft and the surrounding water body, once again making the flocs larger. 3. The fluid at the uppermost end mixes and squeezes with the radial fluid formed by the auxiliary blade 71, once again causing the flocs to agglomerate and grow. 4. Since the tangential flow velocities of the fluid at different heights are different, and the inner annular fluid is trumpet-shaped and in an unstable state, the inward diffusion effect of the inner annular fluid is also different at different heights. Therefore, the turbulent effect of the inner annular fluid inward is strengthened, thereby accelerating the three-dimensional mixing and agglomeration phenomenon of the flocs. 5. Due to the different tangential velocities of the fluid in the height direction and the different coverage ranges in the radial direction, the flow performance in the depth direction is improved to achieve the spatial agglomeration effect of the flocs inside the inner circle. Outer circle of the inner annular fluid: 1. The outer circle of the inner annular fluid mixes and collides with the fluid near the outer circle, causing the flocs in different motion states to collide and agglomerate with each other, accelerating the growth of the flocs. The radial agglomeration effect of the flocs over the entire circumference gradually increases from bottom to top. 2. Since the tangential flow velocities of the fluid at different heights are different, and the shape of the inner annular fluid is trumpet-shaped and in an unstable state, the outward diffusion effect of the inner annular fluid is also different. Therefore, the turbulent effect of the inner annular fluid outward is strengthened, thereby accelerating the three-dimensional mixing and agglomeration phenomenon of the flocs. 3. Due to the different tangential velocities of the fluid in the height direction and the different coverage ranges, the flow performance in the depth direction is improved to achieve the spatial agglomeration effect of the flocs outside the outer circle.

[0043] From the interface down to the lower end surface of the inner annular fluid, the tangential flow velocities of both the inner and outer circles of the inner annular fluid gradually increase. Inner circle of the inner annular fluid: 1. The inner circle of the inner annular fluid mixes and collides with the fluid near the inner circle, causing flocs in different motion states to collide and agglomerate with each other, accelerating the growth of the flocs. The radial agglomeration effect of the flocs in the entire circumferential direction gradually increases from top to bottom. 2. The gradually agglomerating and growing flocs continuously collide and mix with the flocs formed by the coagulant aids ejected from the chemical outlet holes 21 of the transmission shaft and the surrounding water body, causing the flocs to become larger again. 3. The fluid at the lowermost end mixes and squeezes with the fluid at the bottom of the tank, causing the flocs to agglomerate and grow again. 4. Since the tangential flow velocities of the fluid at different heights are different and the shape of the inner annular fluid is trumpet-shaped and in an unstable state, the outward diffusion effect of the inner annular fluid is also different, thus strengthening the turbulent flow effect of the inner annular fluid inward, thereby accelerating the three-dimensional mixing and agglomeration of the flocs. 5. Due to the different tangential velocities of the fluid in the height direction and the coverage range in the radial direction, the flow performance in the depth direction is improved to achieve the spatial agglomeration effect of the flocs inside the inner circle. Outer circle of the inner annular fluid: 1. The outer circle of the inner annular fluid mixes and collides with the fluid near the outer circle, causing flocs in different motion states to collide and agglomerate with each other, accelerating the growth of the flocs. The radial agglomeration effect of the flocs in the entire circumference gradually increases from top to bottom. 2. The fluid at the lowermost end mixes and squeezes with the fluid at the bottom of the tank, causing the flocs to agglomerate and grow again. 3. Since the tangential flow velocities of the fluid at different heights are different and the shape of the inner annular fluid is trumpet-shaped and in an unstable state, the outward diffusion effect of the inner annular fluid is also different, thus strengthening the turbulent flow effect of the inner annular fluid outward, thereby accelerating the three-dimensional mixing and agglomeration of the flocs. 4. Due to the different tangential velocities of the fluid in the height direction and the coverage range, the flow performance in the depth direction is improved to achieve the spatial agglomeration effect of the flocs outside the outer circle.

[0044] The method of this embodiment further includes:

[0045] Step 60, the outer blades 53 rotate to generate a waist-drum-shaped outer annular fluid that rotates around the transmission shaft 2 and is symmetric above and below the interface. The outer circle of the outer annular fluid is the outer edge of the outer blade, and the inner circle of the outer annular fluid is the inner edge of the outer blade.

[0046] From the interface to the upper end surface of the outer annular fluid, the tangential flow velocities of both the inner and outer circles of the outer annular fluid gradually decrease. Inner circle of the outer annular fluid: 1. The outer circle of the inner annular fluid formed by the inner circle of the outer annular fluid and the inner blades, and the mixed fluid after acting on the fluid near the outer circle of the inner annular fluid are mixed and collided with each other, causing the flocs in two different motion states to collide and agglomerate with each other, accelerating the growth of the flocs. Since the tangential flow velocity of the inner annular fluid gradually increases from bottom to top, the outward diffusion of the outer circle of the inner annular fluid gradually increases, the tangential flow velocity of the outer annular fluid gradually decreases, and the inward diffusion of the inner circle of the outer annular fluid gradually decreases. At the same time, the distance between the inner annular fluid and the outer annular fluid gradually decreases. Therefore, the radial agglomeration effect of the flocs between the inner and outer blades in the height direction is balanced, so that the flocs are evenly distributed in the height direction. 2. The fluid on the upper end surface is mixed and squeezed with the fluid near the liquid surface, causing the flocs to agglomerate and grow again. 3. Since the tangential flow velocities of the fluids at different heights are different, and the outer annular fluid is in a waist drum shape and in an unstable state, the outward diffusion effect of the outer annular fluid is also different. Therefore, the turbulent effect of the annular fluid inward is strengthened, thus accelerating the three-dimensional mixing and agglomeration of the flocs. 4. Since the tangential velocity of the fluid in the height direction and the coverage range in the radial direction are different, the flow performance in the depth direction is improved to achieve the spatial agglomeration effect of the flocs inside the inner circle. Outer circle of the outer annular fluid: 1. The outer circle of the outer annular fluid is mixed and collided with the fluid near the outer circle, causing the flocs in different motion states to collide and agglomerate with each other, accelerating the growth of the flocs. The radial agglomeration effect of the flocs in the whole circumference gradually increases from top to bottom. 2. Since the tangential flow velocities of the fluids at different heights are different, and the outer annular fluid is in a waist drum shape and in an unstable state, the outward diffusion effect of the outer annular fluid is also different. Therefore, the turbulent effect of the outer annular fluid outward is strengthened, thus accelerating the three-dimensional mixing and agglomeration of the flocs. 3. Since the tangential velocity of the fluid in the height direction and the coverage range are different, the flow performance in the depth direction is improved to achieve the spatial agglomeration effect of the flocs. 4. Since the distance between the outer blade and the pool wall gradually increases from bottom to top, and the tangential velocity of the fluid gradually decreases at the same time, the collision and mixing effects of the flocs from bottom to top are different, causing the fluid to deflect inward. During the movement process, it is continuously mixed with the fluid above, accelerating the agglomeration process of the flocs. 5. After the mixed fluid moves upward to near the liquid surface, it moves in the direction of the transmission shaft, collides and mixes with the fluid near the liquid surface, further causing the flocs to agglomerate. 6. During the movement process, it is mixed and collided with the radial fluid moving outward generated by the auxiliary blade 71. Since the flow directions of the two fluids are opposite, the mutual collision and agglomeration of the flocs are strengthened. 7. Under the action of the upper auxiliary blade 521, the fluid after interaction changes direction, moves downward between the inner and outer blades, and then repeats the movement and agglomeration process of the flocs under the combined action of the inner and outer blades, accelerating the precipitation of impurities.

[0047] From the interface down to the lower end surface of the outer annular fluid, the tangential flow velocities of both the inner and outer circles of the outer annular fluid gradually decrease. Inner circle of the outer annular fluid: 1. The outer circle of the inner annular fluid formed by the inner circle of the outer annular fluid and the inner blades, and the mixed fluid after interacting with the fluid near the outer circle of the inner annular fluid are mixed and collided with each other, causing the flocs in two different motion states to collide and agglomerate with each other, accelerating the growth of the flocs. Since the tangential flow velocity of the inner annular fluid gradually increases from bottom to top, the outward diffusion of the outer circle of the inner annular fluid gradually increases, and the tangential flow velocity of the outer annular fluid gradually decreases, the inward diffusion of the inner circle of the outer annular fluid will gradually decrease, and at the same time, the distance between the inner annular fluid and the outer annular fluid gradually decreases. Therefore, the radial agglomeration effect of the flocs between the inner and outer blades in the height direction is balanced, so that the flocs are evenly distributed in the height direction. 2. Since the tangential flow velocities of the fluid at different heights are different, and the outer annular fluid is in a waist drum shape, the outward diffusion effect of the outer annular fluid is also different. Therefore, the turbulent effect of the annular fluid inward is strengthened, thus accelerating the three-dimensional mixing and agglomeration of the flocs. 3. Since the tangential velocity of the fluid in the height direction and the coverage range in the radial direction are different, the spatial agglomeration effect of the flocs inside the inner circle is achieved. 4. The fluid at the lower end surface is mixed and squeezed with the fluid at the bottom of the pool, causing the flocs to agglomerate and grow again. Outer circle of the outer annular fluid: 1. The outer circle of the outer annular fluid is mixed and collided with the fluid near the outer circle, causing the flocs in different motion states to collide and agglomerate with each other, accelerating the growth of the flocs. The radial agglomeration effect of the flocs in the whole circumference gradually increases from bottom to top. 2. Since the tangential flow velocities of the fluid at different heights are different, and the outer annular fluid is in a waist drum shape and in an unstable state, the outward diffusion effect of the outer annular fluid is also different. Therefore, the turbulent effect of the outer annular fluid outward is strengthened, thus accelerating the three-dimensional mixing and agglomeration of the flocs. 3. Since the tangential velocity of the fluid in the height direction and the coverage range are different, the flow performance in the depth direction is improved to achieve the spatial agglomeration effect of the flocs. 4. Since the distance between the outer blade and the pool wall gradually increases from top to bottom, and the tangential velocity of the fluid gradually decreases, the collision and mixing effects of the flocs from top to bottom are different, causing the fluid to deflect inward. During the movement process, it continuously mixes with the fluid below, accelerating the agglomeration process of the flocs. 5. The mixed fluid moves downward to the bottom of the pool and moves towards the drive shaft direction, colliding and mixing with the fluid at the bottom of the pool, further causing the flocs to agglomerate. 6. During the movement process, it is mixed and collided with the fluid moving downward generated by the lower blade 4. Since the flow directions of the two fluids are perpendicular to each other, the mutual collision and agglomeration of the flocs are strengthened. 7. Under the action of the lower auxiliary blade 511, the fluid after interaction changes direction, moves upward between the inner and outer blades, and then under the combined action of the inner and outer blades, the movement and agglomeration process of the flocs are repeated, accelerating the precipitation of impurities.

[0048] In the above embodiments, by vertically arranging the arc-shaped inner blades and outer blades, the inner blades generate a double trumpet-shaped inner annular fluid, and the outer blades generate a waist drum-shaped outer annular fluid, so as to realize the continuous collision and growth of flocs in the radial and height directions of the entire circumference, continuously accelerate the agglomeration of flocs, and improve the rapid and efficient precipitation of impurities.

[0049] Preferably, the lower surface of the upper ring 52 is provided with an upper auxiliary blade 521, which is located between the inner blade 54 and the outer blade 53. The upper auxiliary blade 521 is arranged obliquely downward. When the transmission shaft rotates, the upper auxiliary blade 521 generates a rotating fluid moving downward around the transmission shaft between the inner blade 54 and the outer blade 53. The upper surface of the lower ring 51 is provided with a lower auxiliary blade 511, which is located between the inner blade 54 and the outer blade 53. The lower auxiliary blade 511 is arranged obliquely upward. When the transmission shaft rotates, the lower auxiliary blade 511 generates a rotating fluid moving upward around the transmission shaft between the inner blade 54 and the outer blade 53.

[0050] The method of the embodiment of the present invention further includes:

[0051] Step 70, the fluid above the impeller assembly changes direction under the action of the upper auxiliary blade 521 and moves downward between the inner blade and the outer blade. The fluid below the impeller assembly changes direction under the action of the lower auxiliary blade 511 and moves upward between the inner blade and the outer blade. On the one hand, the downward moving fluid and the upward moving fluid collide and mix with each other near the interface, making the flocs continuously increase. On the other hand, after the fluids above and below the interface are remixed, a new mixed fluid is formed, so that the fluids above and below the interface continuously change positions, and under the combined action of the inner blade and the outer blade, the movement and agglomeration process of the flocs are repeated, accelerating the precipitation effect.

[0052] Preferably, the uppermost medicine outlet hole on the transmission shaft is located below the upper end face of the impeller assembly, and the lowermost medicine outlet hole on the transmission shaft is located above the lower end face of the impeller assembly. Preferably, the distance between the uppermost medicine outlet hole on the transmission shaft and the upper end face of the impeller assembly is 100 - 300 mm, and the distance between the lowermost medicine outlet hole on the transmission shaft and the lower end face of the impeller assembly is 100 - 300 mm. This enables the continuously increasing flocs to agglomerate radially under the action of the impeller assembly.

[0053] The method of the preferred embodiment of the present invention uses the integrated sewage treatment equipment of the above preferred embodiment, specifically as follows:

[0054] The coagulant aid is added to the chemical dosing container 7, and the coagulant aid enters the inner cavity of the transmission shaft 2 through the chemical inlet hole, and then enters the flocculation tank through the medicine outlet hole 21.

[0055] The driving member 1 drives the transmission shaft 2 to rotate, driving the upper blade 3, the lower blade 4, the inner blade 54, the outer blade 53, the auxiliary blade 71, the upper auxiliary blade 521 and the lower auxiliary blade 511 to rotate.

[0056] Above the interface:

[0057] The rotation of the upper blade 3 generates a rotating fluid moving upward centered on the transmission shaft. During the upward movement of this fluid, it continuously mixes with the coagulant sprayed outward from the medicine outlet hole 21 of the transmission shaft, enabling the coagulant to be fully dissolved in the fluid and causing the flocs in the fluid to continuously grow near the transmission shaft. The continuously growing flocs continuously mix and collide with the coagulant sprayed from the upper medicine outlet holes during the upward movement with the fluid, causing the flocs to continuously grow in the height direction. Most of the fluid generated by the upper blade mixes with the coagulant and moves upward, while a small part of the fluid flows tangentially outwards around the transmission shaft and generates an inner annular fluid under the action of the inner blade 54, carrying out the flocculation process in different directions and increasing the collision and agglomeration of the flocs in different directions.

[0058] The rotation of the inner blade 54 generates an upward-opening trumpet-shaped inner annular fluid that rotates around the transmission shaft 2. The inner circle of the inner annular fluid mixes and collides with the fluid near the inner circle, causing the flocs in different motion states to collide and agglomerate with each other, accelerating the growth of the flocs. The radial agglomeration effect of the flocs in the entire circumferential direction gradually increases from bottom to top. The gradually agglomerating and growing flocs continuously collide and mix with the flocs formed by the coagulant sprayed outward from the medicine outlet holes of the transmission shaft and the surrounding water body under the action of the upper blade, once again making the flocs larger. The fluid at the uppermost end mixes and squeezes with the radial fluid formed by the auxiliary blade 71, once again causing the flocs to agglomerate and grow. The outer circle of the inner annular fluid mixes and collides with the fluid near the outer circle, causing the flocs in different motion states to collide and agglomerate with each other, accelerating the growth of the flocs. The radial agglomeration effect of the flocs in the entire circumference gradually increases from bottom to top.

[0059] The rotation of the outer blade 53 generates a semi-waist-drum-shaped outer annular fluid that rotates around the transmission shaft 2. The inner circle of the outer annular fluid, the outer circle of the inner annular fluid formed by the inner blade, and the mixed fluid after acting on the fluid near the outer circle of the inner annular fluid are mixed and collided with each other, causing the flocs in two different motion states to collide and agglomerate with each other, accelerating the growth of the flocs. The fluid on the upper end face is mixed and squeezed with the fluid near the liquid surface, causing the flocs to agglomerate and grow again. The outer circle of the outer annular fluid is mixed and collided with the fluid near the outer circle, causing the flocs in different motion states to collide and agglomerate with each other, accelerating the growth of the flocs. Since the distance between the outer blade and the pool wall gradually increases from bottom to top, and at the same time the tangential velocity of the fluid gradually decreases, the collision and mixing effects of the flocs are different from bottom to top, causing the upward-moving fluid to deflect inward and continuously mix with the fluid above during the movement, accelerating the agglomeration process of the flocs. After the mixed fluid moves upward to near the liquid surface, it moves toward the transmission shaft direction, collides and mixes with the fluid near the liquid surface, further causing the flocs to agglomerate.

[0060] The rotation of the auxiliary blade 71 generates a radial fluid, which stirs and mixes the liquid containing flocs and coagulant aids below the liquid surface, causing the flocs to continuously mix, collide and agglomerate between the inner blade and the transmission shaft, accelerating the growth process of the flocs. At the same time, it prevents the fluid from floating upward, causing the fluid to change direction and move around, colliding with the surrounding fluid again, causing the flocs to continuously agglomerate and grow.

[0061] The upward-flowing fluid generated by the upper blade 3 flows to the uppermost end and moves around under the action of the auxiliary blade 71. The outer annular fluid generated by the outer blade moves toward the transmission shaft direction after moving to near the liquid surface, and collides with the radial fluid generated by the auxiliary blade 71.

[0062] Below the interface:

[0063] The rotation of the lower blade 4 generates a downward-moving rotating fluid centered on the transmission shaft. During the downward movement of this fluid, it continuously mixes with the coagulant aid ejected outward from the medicine outlet hole 21 of the transmission shaft, causing the coagulant aid to be fully dissolved in the fluid, and causing the flocs in the fluid to continuously increase between the inner blade and the transmission shaft. The continuously increasing flocs continuously mix and collide with the coagulant aid ejected from the lower medicine outlet hole during the downward movement, causing the flocs to continuously grow in the height direction. Most of the fluid generated by the lower blade and the coagulant aid are mixed and move downward, and a small part of the fluid flows tangentially out around the transmission shaft, generating an inner annular fluid under the action of the inner blade, carrying out the flocculation process in different directions, increasing the collision and agglomeration of the flocs in different directions.

[0064] The inner blades rotate to generate a downward-opening horn-shaped inner annular fluid that rotates around the transmission shaft 2. The inner ring of the inner annular fluid mixes and collides with the fluid near the inner ring, causing flocs in different motion states to collide and agglomerate with each other, accelerating the growth of the flocs. The radial agglomeration effect of the flocs around the entire circumference gradually increases from top to bottom. The gradually agglomerating and growing flocs continuously collide and mix with the coagulant aids ejected outward from the chemical outlet holes 21 of the transmission shaft and the flocs formed by the surrounding water body, making the flocs grow larger once again. The fluid at the lowermost end mixes and squeezes with the fluid at the bottom of the pool, causing the flocs to agglomerate and grow larger again. The outer ring of the inner annular fluid mixes and collides with the fluid near the outer ring, causing flocs in different motion states to collide and agglomerate with each other, accelerating the growth of the flocs. The radial agglomeration effect of the flocs around the entire circumference gradually increases from top to bottom. The fluid at the lowermost end mixes and squeezes with the fluid at the bottom of the pool, causing the flocs to agglomerate and grow larger again.

[0065] The outer blades rotate to generate a semi-waist-drum-shaped outer annular fluid that rotates around the transmission shaft 2. The inner ring of the outer annular fluid mixes and collides with the outer ring of the inner annular fluid formed by the inner blades and the mixed fluid after acting on the fluid near the outer ring of the inner annular fluid, causing flocs in two different motion states to collide and agglomerate with each other, accelerating the growth of the flocs. The fluid on the lower end face mixes and squeezes with the fluid at the bottom of the pool, causing the flocs to agglomerate and grow larger again. The outer ring of the outer annular fluid mixes and collides with the fluid near the outer ring, causing flocs in different motion states to collide and agglomerate with each other, accelerating the growth of the flocs. Since the distance between the outer blades and the pool wall gradually increases from top to bottom and the tangential velocity of the fluid gradually decreases, the collision and mixing effects of the flocs from bottom to top are different, causing the downward-moving fluid to deflect inward. During the movement, it continuously mixes with the fluid below, accelerating the agglomeration process of the flocs. The mixed fluid moves downward to the bottom of the pool and moves toward the transmission shaft, colliding and mixing with the fluid at the bottom of the pool, further causing the flocs to agglomerate.

[0066] The downward-flowing fluid generated by the lower blades 4 flows to the lowermost end and moves around under the action of the bottom of the pool. The outer annular fluid generated by the outer blades moves to the bottom of the pool and then moves toward the transmission shaft, and the fluids at the bottom of the pool collide with each other.

[0067] The fluid above the impeller assembly changes its direction under the action of the upper auxiliary blade 521 and moves downward between the inner blade and the outer blade. The fluid below the impeller assembly changes its direction under the action of the lower auxiliary blade 511 and moves upward between the inner blade and the outer blade. The downward-moving fluid collides and mixes with the upward-moving fluid near the interface, causing the flocs to continuously grow. The fluids above and below the interface are mixed three-dimensionally in the axial and radial directions (the fluids formed by the inner blade, the upper blade, and the lower blade) simultaneously, achieving the spatial flocculation effect. After remixing, a new mixed fluid is formed, causing the fluids above and below the interface to continuously change positions. Under the combined action of the inner blade and the outer blade, the movement and agglomeration process of the flocs are repeated, accelerating the sedimentation effect.

[0068] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above specific embodiments, and the above specific embodiments and the descriptions in the specification are only for further explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the claims and their equivalents.

Claims

1. An integrated sewage treatment method, characterized in that, An integrated sewage treatment device is adopted. The integrated sewage treatment device includes a flocculation device, and the flocculation device is installed in a flocculation tank; the flocculation device includes a driving member (1), a hollow transmission shaft (2), a chemical dosing container (7) and an impeller assembly (5); the driving member (1) is fixed at the top of the flocculation tank body, the driving member (1) is connected to the top end of the transmission shaft (2), and the bottom end of the transmission shaft (2) is connected to the bottom end of the flocculation tank body through a bearing (6); both the chemical dosing container (7) and the impeller assembly (5) are installed on the transmission shaft (2), and the chemical dosing container (7) is located above the impeller assembly (5); the chemical dosing container (7) is a thin-walled cylinder with an open upper end for containing a coagulant aid; the chemical dosing container (7) is coaxially arranged with the transmission shaft (2) and rotates synchronously with the transmission shaft; a plurality of chemical inlet holes are provided on the circumferential wall of the shaft of the transmission shaft located inside the chemical dosing container (7), and the inner cavities of the chemical dosing container and the transmission shaft (2) are communicated through the chemical inlet holes; a plurality of chemical outlet holes (21) are provided on the circumferential wall of the shaft of the transmission shaft located inside the impeller assembly; a upper blade (3) and a lower blade (4) are horizontally arranged in the middle of the transmission shaft (2), the bottom end of the upper blade (3) is connected to the top end of the lower blade (4), and the upper blade (3) and the lower blade (4) are located between the inner blade and the transmission shaft; the upper blade (3) is inclined upward, and the lower blade (4) is inclined downward; the impeller assembly (5) includes a lower ring (51) and an upper ring (52) coaxially sleeved on the transmission shaft, and the lower ring (51) and the upper ring (52) are arranged at intervals along the axial direction of the transmission shaft; the lower ring (51) is located below the lower blade (4), and the upper ring (52) is located between the upper blade (3) and the bottom end of the chemical dosing container; a plurality of blade groups are evenly distributed circumferentially between the lower ring (51) and the upper ring (52), and the number of blade groups is 2 to 4 groups; each blade group includes an inner blade (54) and an outer blade (53) arranged at intervals in the radial direction, and the inner blade and the outer blade are located in the same radial plane; the inner blade (54) is a plate-like structure with two arc-shaped edges protruding towards the transmission shaft, and the outer blade (53) is a plate-like structure with two arc-shaped edges protruding away from the transmission shaft; the impeller assembly (5) is an axially symmetric structure; the axial symmetry plane of the impeller assembly (5) is used as a dividing surface, the upper blade (3) is located above the dividing surface, and the lower blade (4) is located below the dividing surface; The integrated sewage treatment method includes the following steps: Step 10: Add the coagulant aid into the chemical dosing container (7), the coagulant aid enters the inner cavity of the transmission shaft (2) through the chemical inlet holes, and then enters the flocculation tank through the chemical outlet holes (21); Step 20: The driving member (1) drives the transmission shaft (2) to rotate, driving the chemical dosing container (7), the upper blade (3), the lower blade (4) and the impeller assembly (5) to rotate; Step 30: The upper blade (3) rotates to generate a rotating fluid moving upward with the transmission shaft as the center. During the upward movement of the fluid, it continuously mixes with the coagulant sprayed outward from the medicine outlet holes (21) of the transmission shaft, so that the coagulant is fully dissolved in the fluid, and the flocs in the fluid continuously grow near the transmission shaft. The continuously growing flocs continuously mix and collide with the coagulant sprayed from the upper medicine outlet holes again during the upward movement following the fluid, causing the flocs to continuously grow in the height direction. Most of the fluid generated by the upper blade (3) moves upward after mixing with the coagulant, and a small part of the fluid flows tangentially outwards around the transmission shaft, generating an annular fluid under the action of the impeller assembly (5) to carry out the flocculation process in different directions, increasing the collision and agglomeration of the flocs in different directions. The lower blade (4) rotates to generate a rotating fluid moving downward with the transmission shaft as the center. During the downward movement of the fluid, it continuously mixes with the coagulant sprayed outward from the medicine outlet holes (21) of the transmission shaft, so that the coagulant is fully dissolved in the fluid, and the flocs in the fluid continuously grow between the inner blade and the transmission shaft. The continuously growing flocs continuously mix and collide with the coagulant sprayed from the lower medicine outlet holes again during the downward movement, causing the flocs to continuously grow in the height direction. Most of the fluid generated by the lower blade (4) moves downward after mixing with the coagulant, and a small part of the fluid flows tangentially outwards around the transmission shaft, generating an annular fluid under the action of the impeller assembly (5) to carry out the flocculation process in different directions, increasing the collision and agglomeration of the flocs in different directions.

2. The integrated sewage treatment method according to claim 1, wherein The top of the chemical dosing container (7) is located above the liquid level, and the bottom is located below the liquid level; several auxiliary blades (71) are provided at the outer bottom of the chemical dosing container (7); when the transmission shaft rotates, the chemical dosing container (7) rotates synchronously with the transmission shaft. The integrated sewage treatment method further includes: Step 40: The auxiliary blades (71) generate a radial fluid below the liquid level to stir and mix the fluid containing flocs and coagulant, so that the flocs continuously mix, collide and agglomerate within the rotation radius of the auxiliary blades, accelerating the growth process of the flocs; at the same time, preventing the fluid from floating, changing the direction of the upward fluid to move around, and causing a second collision with the surrounding fluid, so that the flocs continuously agglomerate and grow.

3. The integrated sewage treatment method according to claim 2, wherein It further includes: Step 50: The inner blade (54) rotates to generate a double-horn-shaped inner annular fluid rotating around the transmission shaft (2), and is symmetric above and below the interface. Above the interface, the inner ring of the inner annular fluid mixes and collides with the fluid near the inner ring, causing the flocs in different motion states to collide and agglomerate with each other, accelerating the growth of the flocs. The radial agglomeration effect of the flocs in the entire circumferential direction gradually increases from bottom to top; the gradually agglomerating and growing flocs continuously collide and mix with the flocs formed by the coagulant aid ejected from the chemical outlet holes (21) of the transmission shaft and the surrounding water body under the action of the upper blades, making the flocs larger again; the fluid at the uppermost end mixes and squeezes with the radial fluid formed by the auxiliary blades (71), making the flocs agglomerate and grow again; the outer ring of the inner annular fluid mixes and collides with the fluid near the outer ring, causing the flocs in different motion states to collide and agglomerate with each other, accelerating the growth of the flocs. The radial agglomeration effect of the flocs in the entire circumference gradually increases from bottom to top; Below the interface, the inner ring of the inner annular fluid mixes and collides with the fluid near the inner ring, causing the flocs in different motion states to collide and agglomerate with each other, accelerating the growth of the flocs. The radial agglomeration effect of the flocs in the entire circumference gradually increases from top to bottom; the gradually agglomerating and growing flocs continuously collide and mix with the flocs formed by the coagulant aid ejected from the chemical outlet holes (21) of the transmission shaft and the surrounding water body, making the flocs larger again; the fluid at the lowermost end mixes and squeezes with the fluid at the bottom of the pool, making the flocs agglomerate and grow again; the outer ring of the inner annular fluid mixes and collides with the fluid near the outer ring, causing the flocs in different motion states to collide and agglomerate with each other, accelerating the growth of the flocs. The radial agglomeration effect of the flocs in the entire circumference gradually increases from top to bottom; the fluid at the lowermost end mixes and squeezes with the fluid at the bottom of the pool, making the flocs agglomerate and grow again.

4. The integrated sewage treatment method according to claim 3, characterized in that, It also includes: Step 60, the outer blades (53) rotate to generate a waist-shaped outer annular fluid that rotates around the transmission shaft (2) and is symmetric above and below the interface; Above the interface, the inner ring of the outer annular fluid mixes and collides with the outer ring of the inner annular fluid formed by the inner blades and the mixed fluid after acting on the fluid near the outer ring of the inner annular fluid, causing the flocs in two different motion states to collide and agglomerate with each other, accelerating the growth of the flocs; the fluid on the upper end face mixes and squeezes with the fluid near the liquid surface, making the flocs agglomerate and grow again; the outer ring of the outer annular fluid mixes and collides with the fluid near the outer ring, causing the flocs in different motion states to collide and agglomerate with each other, accelerating the growth of the flocs. The radial agglomeration effect of the flocs in the entire circumference gradually increases from top to bottom; since the distance between the outer blades and the pool wall gradually increases from bottom to top, and at the same time the tangential velocity of the fluid gradually decreases, the collision and mixing effects of the flocs are different from bottom to top, causing the upward-moving fluid to deflect inward and continuously mix with the fluid above during the movement, accelerating the agglomeration process of the flocs; the mixed fluid moves upward to near the liquid surface and then moves towards the transmission shaft direction, colliding and mixing with the fluid near the liquid surface, further agglomerating the flocs; Below the interface, the inner ring of the outer annular fluid, the outer ring of the inner annular fluid formed by the inner blades, and the mixed fluid after interacting with the fluid near the outer ring of the inner annular fluid are mixed and collided with each other, causing the flocs in two different motion states to collide and agglomerate with each other, accelerating the growth of the flocs; the fluid on the lower end face is mixed and squeezed with the fluid at the bottom of the tank, causing the flocs to agglomerate and increase again; the outer ring of the outer annular fluid is mixed and collided with the fluid near the outer ring, causing the flocs in different motion states to collide and agglomerate with each other, accelerating the growth of the flocs, and the radial agglomeration effect of the flocs gradually decreases from top to bottom along the entire circumference; since the distance between the outer blades and the tank wall gradually increases from top to bottom, and the tangential velocity of the fluid gradually decreases, the collision and mixing effects of the flocs from bottom to top are different, causing the fluid moving downward to deflect inward. During the movement process, it is continuously mixed with the fluid below, accelerating the agglomeration process of the flocs; the mixed fluid moves downward to the bottom of the tank and moves towards the transmission shaft, colliding and mixing with the fluid at the bottom of the tank, further causing the flocs to agglomerate.

5. The integrated sewage treatment method according to claim 4, characterized in that, The lower surface of the upper ring (52) is provided with upper auxiliary blades (521), and is located between the inner blades (54) and the outer blades (53); the upper auxiliary blades (521) are arranged obliquely downward. When the transmission shaft rotates, the upper auxiliary blades (521) generate a downward-moving rotating fluid centered on the transmission shaft between the inner blades (54) and the outer blades (53); The upper surface of the lower ring (51) is provided with lower auxiliary blades (511), and is located between the inner blades (54) and the outer blades (53); The lower auxiliary blades (511) are arranged obliquely upward. When the transmission shaft rotates, the lower auxiliary blades (511) generate an upward-moving rotating fluid centered on the transmission shaft between the inner blades (54) and the outer blades (53); The integrated sewage treatment method further includes: Step 70, the fluid above the impeller assembly changes direction and moves downward between the inner blades and the outer blades under the action of the upper auxiliary blades (521); the fluid below the impeller assembly changes direction and moves upward between the inner blades and the outer blades under the action of the lower auxiliary blades (511); the downward-moving fluid and the upward-moving fluid collide and mix with each other near the interface, causing the flocs to continuously increase; the fluid above and below the interface is mixed three-dimensionally in both the axial and radial directions, achieving the spatial flocculation effect. After re-mixing, a new mixed fluid is formed, causing the fluid above and below the interface to continuously change positions, and under the combined action of the inner blades and the outer blades, repeating the movement and agglomeration process of the flocs, accelerating the sedimentation effect.

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