Sewage treatment device for water conservancy project

Abstract

The invention relates to the technical field of sewage treatment, in particular to a sewage treatment device for a water conservancy project. The invention aims to overcome the defects that the time of a suspended matter precipitation process is relatively long, and secondary pollution of sewage is easily caused by precipitates in a precipitation tank cleaning process. The technical scheme of the invention is as follows: the sedimentation tank is provided with a sewage inlet positioned at the upper part of the sedimentation tank and a sewage outlet positioned at the lower part of the sedimentation tank; the rotating outer cylinder is movably arranged at the bottom in the sedimentation tank; and the venturi tubes are arranged on the outer wall of the rotating outer cylinder, and the number of the venturi tubes is multiple. By arranging the venturi tube, the venturi tube simultaneously sprays out a flocculating agent and air, so that the air is blown into fine bubbles by the flocculating agent, the flocculating agent is changed into flocculation groups and adheres to pollutants to float on the surface of sewage, the sewage treatment efficiency is improved, meanwhile, a worker can conveniently treat the pollutants adhered by the flocculation groups in time, and the sewage treatment efficiency is improved. Therefore, secondary pollution of pollutants to the sewage is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to a sewage treatment device for a water conservancy project. Background Art

[0002] Wastewater treatment is a process that effectively removes pollutants from sewage through physical precipitation and biological or chemical treatment. When sewage is discharged into the natural environment after sewage treatment, it will not damage the self-repairing ability of the natural environment.

[0003] In the existing sewage treatment process, suspended matter in the sewage is usually removed by standing or flocculant precipitation. This operation is usually carried out in a sedimentation tank, but the sedimentation process of sewage is relatively long, and the sediment will accumulate at the bottom of the sedimentation tank. Excessive accumulation of sediment will lead to blockage of sewage flow in the sedimentation tank. In the existing technology, common sediment treatment methods are salvage and pipeline extraction, but both methods will cause turbulence at the bottom of the sewage, causing the sediment at the bottom of the sedimentation tank to be affected by the turbulence during the cleaning process and flow around with the turbulence. The sediment spreads in all directions, causing the sewage inside the sedimentation tank to be secondary polluted by the sediment. To this end, a sewage treatment device for water conservancy projects is provided that is highly efficient and avoids secondary pollution of sewage. Summary of the Invention

[0004] In order to overcome the shortcomings of a long suspended matter settling process and the secondary pollution of sewage by sediment during the sedimentation tank cleaning process, the present invention aims to provide a sewage treatment device for water conservancy projects with high efficiency and avoiding secondary pollution of sewage.

[0005] The technical implementation scheme of the present invention is: a sewage treatment device for a water conservancy project, comprising: sedimentation tanks; A rotating outer cylinder is movably provided at the bottom of the sedimentation tank; Venturi tubes: a plurality of venturi tubes are provided on the outer wall of the rotating outer cylinder, and a flocculant feed port and an air feed port are provided on the venturi tubes; a first pipe, wherein the flocculant feed port is connected to the first pipe; A gas-liquid slip ring is provided at the bottom of the sedimentation tank and is connected to the first pipeline; A second pipeline, wherein the air feed port is connected to a second pipeline connected to the gas-liquid slip ring; A support and protection unit is provided inside the rotating outer cylinder for supporting the venturi tube; A sealing adjustment unit is provided inside the rotating outer cylinder for adjusting the starting state of the venturi tube; A speed-changing rotating unit is provided at the top end of the inner portion of the rotating outer cylinder for driving the venturi to rotate at a variable speed; Stirring and rotating units: the outer wall of the rotating outer cylinder is provided with a plurality of stirring and rotating units for mixing sewage and flocculant; A flocculation storage unit is provided on the inner wall of the sedimentation tank for collecting and storing flocculation groups.

[0006] Preferably, the support and protection unit includes: Support rods, a plurality of support rods are provided inside the rotating outer cylinder; A rotating inner cylinder, wherein a plurality of the support rods are fixedly connected to the rotating inner cylinder, and the rotating inner cylinder is fixedly connected to a plurality of the venturi tubes in a through-type manner; Preferably, the sealing adjustment unit includes: A cam column is rotatably provided in the rotating inner cylinder, the cam column is fixedly connected to the sedimentation tank, and a plurality of cam grooves are opened on the outer wall of the cam column, and the cam grooves correspond to a plurality of the venturi tubes at the same height; A stepped sealing plug is slidably provided in the venturi tube, and one end of the stepped sealing plug contacts the cam groove; A first spring is provided on the stepped sealing plug, and one end of the first spring is fixedly connected to the venturi tube.

[0007] Preferably, the speed-changing rotation unit includes: A support shell is provided on the top of the cam column; A motor is disposed in the support shell, and an output shaft of the motor passes through the support shell; An eccentric disk is provided on the output shaft of the motor; A movable frame is movably provided on the eccentric disk, a horizontal slide groove is provided at the center of the movable frame, and the eccentric shaft of the eccentric disk is located inside the horizontal slide groove; The limiting frames are symmetrically arranged on the supporting shell, and the tops of the symmetrically arranged limiting frames are slidably connected to the moving frame.

[0008] Preferably, the speed-changing rotation unit further includes: Ratchet bars, wherein the inner side of the movable frame is provided with guide grooves in a rectangular distribution, and ratchet bars are provided in two opposite guide grooves for sliding together; Second springs, a plurality of second springs are provided on one side of the ratchet bar, and one end of the plurality of second springs is fixedly connected to the moving frame; Ratchet: A ratchet is provided at the top end of the inner portion of the rotating outer cylinder, and the ratchet is engaged with the ratchet bar.

[0009] Preferably, it also includes: A lower wave ring, wherein the bottom of the sedimentation tank is fixedly connected with the lower wave ring; An upper wave ring is fixedly connected to the bottom of the rotating outer cylinder, and the upper wave ring is in contact with the lower wave ring.

[0010] Preferably, the stirring and rotating unit includes: Blades: A plurality of blades are provided on the circumferential outer wall of the rotating outer cylinder.

[0011] Preferably, the stirring and rotating unit further comprises: A brush row is slidably provided on one end of the fan blade; A third spring is provided at one end of the brush row, and one end of the third spring is fixedly connected to the fan blade.

[0012] Preferably, the flocculation storage unit includes: A flocculant storage tank is provided on the inner wall of the sedimentation tank in a mirror-image distribution, and is used to collect and store flocculants; An isolation net is provided at the connection point between the flocculent storage tank and the sedimentation tank, and the isolation net is used to prevent the flocculent groups from being guided by the vortex to flow out of the flocculent storage tank.

[0013] Preferably, it also includes: Bubble nozzles: a plurality of bubble nozzles are provided at the bottom of the sedimentation tank.

[0014] The beneficial effects of the present invention are: 1. The present invention differs from the prior art by providing a venturi tube. The venturi tube sprays flocculant and air simultaneously, allowing the flocculant to break the air into fine bubbles, thereby maintaining a low density of the flocculant during the flocculation process. The flocculant turns into flocs that adhere to pollutants and float on the surface of the sewage. While improving sewage treatment efficiency, it is convenient for staff to promptly handle pollutants adhered to the flocs, thereby avoiding secondary pollution of the sewage by pollutants.

[0015] 2. The present invention provides a variable speed rotation unit. By starting the motor, the output shaft of the motor drives the moving frame to smoothly change speed and reciprocate. The ratchet bar and the ratchet wheel convert the smooth variable speed and reciprocating sliding of the moving frame into a smooth counterclockwise variable speed rotation of the rotating outer cylinder, so that the venturi tube rotates synchronously and sprays flocculant. When the venturi tube slows down, the flocculation volume of the flocculant increases, which is convenient for the staff to remove the flocculant, thereby improving the staff's cleaning efficiency of the sedimentation tank.

[0016] 3. The present invention sets a bubble nozzle. When the venturi tube sprays flocculant, the staff starts the bubble nozzle to spray bubbles. On the one hand, the bubbles will contact and use their own surface to protect the flocculants, and promote the rise of the flocculants through buoyancy. On the other hand, the bubbles will adhere to the pollutants in the sewage through their own surface, thereby further improving the sewage treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic cross-sectional view of a sedimentation tank of the present invention; Figure 3 This is a schematic structural diagram of the rotating outer cylinder of the present invention; Figure 4 It is a cross-sectional schematic diagram of the rotating outer cylinder of the present invention; Figure 5 is a schematic cross-sectional view of the cam column of the present invention; Figure 6 is a schematic cross-sectional view of the venturi tube of the present invention; Figure 7 Schematic diagram of the structure of the ratchet bar of the present invention; Figure 8 It is a structural schematic diagram of the mobile frame of the present invention; Figure 9 Schematic diagram of the structure of the ratchet of the present invention; Figure 10 Schematic cross-section of the upper and lower wave rings of the present invention; Figure 11 Schematic cross-section of the brush row of the present invention; Figure 12 For the present invention Figure 2 A partial enlarged view of point A in the middle.

[0018] Reference numerals in the figure: 1-sedimentation tank, 101-lower wave ring, 2-rotating outer cylinder, 201-upper wave ring, 3-Venturi tube, 301-flocculant feed port, 302-air feed port, 303-first pipeline, 304-gas-liquid slip ring, 305-second pipeline, 4-support rod, 5-rotating inner cylinder, 6-cam column, 601-cam groove, 7-step sealing plug, 8-first spring, 9-support shell, 10-motor, 11-eccentric disk, 12-movable frame, 121-guide groove, 13-limiting frame, 14-ratchet bar, 15-second spring, 16-ratchet, 17-fan blade, 18-brush row, 19-third spring, 20-flocculant storage tank, 21-isolation net, 22-bubble nozzle. DETAILED DESCRIPTION

[0019] The above scheme is further described below with reference to specific examples. It should be understood that these examples are intended to illustrate the present application and are not intended to limit the scope of the present application. The implementation conditions used in the examples can be further adjusted according to the conditions of the specific manufacturer. The implementation conditions not specified are generally those used in routine experiments.

[0020] Example 1 A sewage treatment device for a water conservancy project, such as Figure 1-Figure 3 As shown, it includes a sedimentation tank 1, a rotating outer cylinder 2, a venturi tube 3, a first pipe 303, a gas-liquid slip ring 304, a second pipe 305, a support and protection unit, a sealing adjustment unit, a variable speed rotation unit, a stirring and rotating unit and a flocculation storage unit. The sedimentation tank 1 is provided with a sewage discharge inlet located at its upper part and a sewage discharge outlet located at its lower part. The bottom of the sedimentation tank 1 is movably provided with a rotating outer cylinder 2. The rotating outer cylinder 2 can move up and down in the sedimentation tank 1 and rotate along the vertical axis. A plurality of venturi tubes 3 are circumferentially distributed and fixedly connected to the outer wall of the rotating outer cylinder 2, and the venturi tubes 3 are fixedly connected to the outer wall of the rotating outer cylinder 2. 3 is provided with a flocculant feed port 301 and an air feed port 302. The air feed port 302 is located at the narrow tube of the venturi tube 3, and the flocculant feed port 301 is located at the thick tube of the venturi tube 3. The flocculant feed port 301 is connected and fixedly connected with a first pipe 303. A gas-liquid slip ring 304 is fixedly installed at the bottom of the sedimentation tank 1. One end of the first pipe 303 is connected and fixedly connected with the liquid outlet of the gas-liquid slip ring 304. The liquid inlet of the gas-liquid slip ring 304 is connected to the external flocculant pump through a first hose (the first hose and the flocculant pump are not shown in the figure), so that the gas-liquid slip ring 304 can During the rotation of the first pipe 303, flocculant is continuously introduced into the first pipe 303. The air feed port 302 is fixedly connected to the second pipe 305. One end of the second pipe 305 is fixedly connected to the air outlet of the gas-liquid slip ring 304. The air inlet of the gas-liquid slip ring 304 is connected to the external air pump through the second hose (the second hose and the air pump are not shown in the figure). Therefore, the gas-liquid slip ring 304 can continuously introduce air into the second pipe 305 during the rotation of the second pipe 305, so that the venturi 3 can spray out flocculant filled with fine bubbles. The inner part of the rotating outer cylinder 2 is provided with a A supporting and protecting unit is provided, which is used to support the venturi tube 3. A sealing adjustment unit is provided inside the rotating outer cylinder 2, which is used to adjust the starting state of the venturi tube 3. A variable speed rotation unit is provided at the top of the rotating outer cylinder 2, which is used to drive the venturi tube 3 to rotate at a variable speed. A plurality of stirring and rotating units are provided on the outer wall of the rotating outer cylinder 2, which are used to mix sewage and flocculants and drive the flocculants to move toward the inner wall of the sedimentation tank 1. A flocculation storage unit is provided on the inner wall of the sedimentation tank 1, which is used to collect and store flocculants.

[0021] Among them, such as Figure 3As shown, the support and protection unit is arranged inside the rotating outer cylinder 2, and is used to support one end of the venturi tube 3 to prevent the air inlet 302 of the venturi tube 3 from being deformed and damaged due to excessive local force. The support and protection unit includes a support rod 4 and a rotating inner cylinder 5. Several support rods 4 are arranged inside the rotating outer cylinder 2, and the several support rods 4 are fixedly connected to the rotating inner cylinder 5. The rotating inner cylinder 5 is fixedly connected to the several venturi tubes 3 in a through-type manner.

[0022] Among them, such as Figure 4-Figure 6 As shown, the sealing adjustment unit is arranged inside the rotating outer cylinder 2 and is used to adjust the starting state of the venturi tube 3. The sealing adjustment unit includes a cam column 6, a stepped sealing plug 7 and a first spring 8. The cam column 6 is rotatably connected to the rotating inner cylinder 5. The bottom of the cam column 6 is fixedly connected to the bottom end of the sedimentation tank 1. A plurality of cam grooves 601 are opened on the outer wall of the cam column 6. The cam grooves 601 correspond to a plurality of venturi tubes 3 at the same height. A stepped sealing plug 7 is slidably connected to the venturi tube 3. One end of the stepped sealing plug 7 is in contact with the cam groove 601. The first spring 8 is fixedly connected to the stepped surface of the stepped sealing plug 7. One end of the first spring 8 is fixedly connected to one end inside the venturi tube 3.

[0023] Among them, such as Figure 3-Figure 4 and Figure 7-Figure 9As shown, the speed-changing rotation unit is arranged at the top end of the rotating outer cylinder 2, which is used to drive the venturi tube 3 to rotate at a variable speed, so that the venturi tube 3 can spray more flocculants in a smaller range, so that the flocculants can absorb more suspended matter in the sewage in a small range, and combine with the suspended matter in the sewage to condense into larger flocculants, which is convenient for the staff to clean the flocculants. The speed-changing rotation unit includes a support shell 9, a motor 10, an eccentric disk 11, a movable frame 12, a limit frame 13, a ratchet bar 14, a second spring 15 and a ratchet 16. The top of the cam column 6 is fixedly connected to the support shell 9, and the motor 10 is fixedly installed at the center of the support shell 9. The output shaft of the motor 10 passes through the support shell 9, and the eccentric disk 11 is fixedly connected to the output shaft of the motor 10. The movable frame 12 is movably provided on the eccentric disk 11, and a horizontal slide groove is provided in the center of the movable frame 12. The eccentric shaft of the disk 11 is located inside the horizontal slide groove, and a limit frame 13 is symmetrically arranged on the support shell 9. The top of the symmetrically arranged limit frame 13 is slidably connected to the mobile frame 12, which is used to limit the moving direction of the mobile frame 12 and limit the angle of the mobile frame 12 when moving, so that the eccentric shaft of the eccentric disk 11 itself generates a sine wave along the limiting direction of the limit frame 13, so that the mobile frame 12 can move at a variable speed along the limiting direction of the limit frame 13 under the drive of the eccentric disk 11. A guide groove 121 is provided in a rectangular distribution on the inner side of the mobile frame 12, and a ratchet bar 14 is slidingly arranged in two opposite guide grooves 121. A plurality of second springs 15 are provided on one side of the ratchet bar 14, and one end of the plurality of second springs 15 is fixedly connected to the mobile frame 12. A ratchet 16 is provided at the top end inside the rotating outer cylinder 2, and the ratchet 16 is engaged with the ratchet bar 14.

[0024] In the initial state, the stepped sealing plug 7 is located at the protrusion of the cam groove 601, so that the cam groove 601 squeezes the stepped sealing plug 7, thereby blocking the flocculant feed port 301 of the venturi tube 3 and driving the first spring 8 to be in a stretched state; when the device is working, the staff first introduces sewage into the sedimentation tank 1 through the sewage discharge port, and starts the external air pump to allow the air pump to introduce air into the second hose, and the air enters the air inlet of the gas-liquid slip ring 304 through the second hose, and passes through the air outlet of the gas-liquid slip ring 304, so that the air is discharged from the gas-liquid slip ring 304. The air outlet of the ring 304 passes through the second pipe 305 and enters the venturi 3 through the air feed port 302. The air is then ejected from the narrow end of the venturi 3, filling the narrow end of the venturi 3 with air, thereby preventing the sewage from contaminating the interior of the venturi 3. In addition, the air enters the sewage in the sedimentation tank 1 to generate bubbles. The bubbles adhere to the hydrophobic suspended matter in the sewage through the surface tension of the sewage, thereby forming a bubble-suspended matter complex. The buoyancy of the bubbles causes the suspended matter to float to the water surface, forming a scum layer, thereby achieving preliminary treatment of the suspended matter in the sewage by the device.Then the staff starts the external flocculant pump, so that the flocculant pump passes the flocculant to the liquid inlet of the gas-liquid slip ring 304 through the first hose, so that the flocculant reaches the flocculant feed port 301 at the liquid outlet of the gas-liquid slip ring 304 through the first pipe 303 and is blocked by the outer wall of the stepped sealing plug 7. At the same time, the motor 10 is started to rotate the output shaft of the motor 10 and drive the eccentric disk 11 to rotate. The rotation of the eccentric disk 11 drives the moving frame 12 to move back and forth along the top of the limit frame 13 through its own eccentric shaft. The moving frame 12 is moved by the ratchet during the movement. The rod 14 drives the ratchet 16 to rotate counterclockwise, so that the ratchet 16 drives the venturi 3 to rotate by rotating the outer cylinder 2. During the rotation process, the venturi 3 drives the stepped sealing plug 7 to rotate synchronously, so that the stepped sealing plug 7 slides on the surface of the cam groove 601 under the tension of the first spring 8, so that the radius of the stepped sealing plug 7 revolving along the axis of the cam column 6 is continuously reduced, so that the stepped sealing plug 7 slides in the venturi 3, and the stepped sealing plug 7 gradually separates from the flocculant feed port 301 of the venturi 3, so that the flocculant is no longer blocked and flows out from the narrow opening of the venturi 3. When the flocculant flows to the narrow mouth of the venturi tube 3, the flow cross-sectional area of the flocculant gradually becomes smaller. Since the flow time and flow volume of the flocculant remain unchanged, the flow velocity of the flocculant at the narrow mouth of the venturi tube 3 gradually becomes higher, so that the flocculant flows at a high speed at the narrow mouth of the venturi tube 3, thereby breaking the air flow at the narrow mouth of the venturi tube 3, and the air flow is converted into fine bubbles. The fine bubbles are mixed with the flocculant and sprayed out of the venturi tube 3. The fine bubbles make the flocculant more evenly distributed in the sewage, thereby promoting the flocculant to quickly flocculate into floccules in the sewage. During the flocculation process, the flocculants adhere to suspended matter in the sewage, thereby achieving aggregation and treatment of suspended matter in the sewage. Because the flocculant contains a large number of fine bubbles, the flocculants form a porous structure when they are formed. The fine bubbles reduce the density of the flocculants. Under the action of buoyancy, the flocculants drive the suspended matter up until the floccules float on the surface of the sewage. The floccules also adhere to the pollutants and float on the surface of the sewage. While improving the sewage treatment efficiency, it is convenient for staff to promptly handle the pollutants adhered to the flocculants, thus avoiding secondary pollution of the sewage by pollutants.

[0025] It is worth noting that, through the rotation of the eccentric disc 11, the eccentric shaft of the eccentric disc 11 drives the movable frame 12 to move smoothly along the restricted direction of the limit frame 13. During the speed change, the movable frame 12 drives the ratchet 16 to rotate smoothly through the ratchet bar 14, so that the ratchet 16 drives the venturi tube 3 to rotate smoothly along the axis of the cam column 6 by rotating the outer cylinder 2. When the rotation speed of the venturi tube 3 slows down, the flocculant is sprayed out from the narrow end of the venturi tube 3 and gathered in the same space, thereby forming a larger volume of flocculants, making the flocculants easier to be salvaged and cleaned, thereby improving the removal efficiency of suspended matter in sewage.

[0026] Among them, such as Figure 10 As shown, the device also includes a lower wave ring 101 and an upper wave ring 201. The lower wave ring 101 is fixedly connected to the bottom of the sedimentation tank 1, and the upper wave ring 201 is fixedly connected to the bottom of the rotating outer cylinder 2. The upper wave ring 201 contacts and cooperates with the lower wave ring 101, so that when the upper wave ring 201 rotates, it can drive the venturi tube 3 to move up and down by rotating the outer cylinder 2, thereby making the flocculant more evenly distributed in the sewage and improving the adhesion ability of the flocculant to the sewage.

[0027] During the rotation of the rotating outer cylinder 2, the rotating outer cylinder 2 drives the upper wave ring 201 at the bottom to rotate synchronously, so that the upper wave ring 201 squeezes the lower wave ring 101 at its bottom, and the upper wave ring 201 moves back and forth up and down along the wave surface of the lower wave ring 101, so that the upper wave ring 201 drives the rotating outer cylinder 2 to move up and down synchronously. During the movement, the rotating outer cylinder 2 drives the ratchet 16 to slide on the ratchet surface of the ratchet bar 14, and drives the rotating outer cylinder 2 to move the venturi tube 3 up and down, so that when the venturi tube 3 sprays flocculant, the spraying range of the flocculant can cover the sewage between the upper and lower venturi tubes 3, thereby improving the adhesion efficiency of the flocculant to suspended matter during flocculation.

[0028] Among them, such as Figure 2 and Figure 11 As shown, the stirring and rotating unit is arranged on the outer wall of the rotating outer cylinder 2, and is used to mix the sewage and the flocculant so that the flocculant can fully adhere to the suspended matter in the sewage during the flocculation process. The stirring and rotating unit drives the flocculants to flow with the vortex, so that the flocculants are moved to the inner wall of the sedimentation tank 1 by centrifugal force. The stirring and rotating unit includes fan blades 17, brush rows 18 and third springs 19. A plurality of fan blades 17 are arranged on the circumferential outer wall of the rotating outer cylinder 2, which are used to stir the sewage to generate a vortex, guide the flocculant and flocculants to flow through the vortex, and diffuse the flocculants and flocculants to the inner wall of the sedimentation tank 1 by centrifugal force. A brush row 18 is slidably arranged at one end of the fan blade 17. The brush row 18 is used to clean the inner wall of the sedimentation tank 1 to prevent the flocculants from adhering to the inner wall of the sedimentation tank 1. A third spring 19 is arranged at one end of the brush row 18, and one end of the third spring 19 is fixedly connected to the fan blade 17.

[0029] During the counterclockwise speed change rotation of the rotating outer cylinder 2, the fan blades 17 will also be driven to rotate synchronously counterclockwise. It is worth noting that since the fan blades 17 are C-shaped, the inner side of the fan blades 17 will more effectively push the sewage to generate a vortex during the accelerated rotation. The vortex will cause the flocculants to rotate coaxially along the axis of the cam column 6, and the flocculants will gradually approach the inner wall of the sedimentation tank 1 under the action of the centrifugal force generated during their own movement, which is convenient for the staff to clean the flocculants in the sedimentation tank 1, thereby improving the use efficiency of the device, and the rotation of the fan blades 17 causes the flocculant that has not been completely flocculated to flow with the vortex, thereby fully adhering to the suspended matter in the vortex; during the deceleration rotation of the fan blades 17, the rotation speed of the fan blades 17 is slower than the flow speed of the vortex, so that the vortex bypasses the fan blades 17 along the outer side of the fan blades 17, thereby reducing the loss of the vortex flow velocity by the fan blades 17 during the deceleration process, so that the vortex can flow continuously and stably.

[0030] When the flocs move in the sewage and approach the inner wall of the sedimentation tank 1, they may adhere to the inner wall of the sedimentation tank 1. At this time, the fan blades 17 rotate to drive the brush row 18 to rotate synchronously. The third spring 19 squeezes the brush row 18 through elastic force, so that the brush row 18 cleans the flocs attached to the inner wall of the sedimentation tank 1, thereby ensuring the cleanliness of the sedimentation tank 1.

[0031] Among them, such as Figure 1-Figure 2 As shown, the flocculation storage unit is arranged on the inner wall of the sedimentation tank 1, and is used for collecting and storing floccules, and the operation of the device is not affected during the process of collecting and storing floccules. The flocculation storage unit includes a flocculent storage tank 20 and an isolation net 21. The flocculent storage tank 20 is arranged on the inner wall of the sedimentation tank 1 in a mirror-image distribution. The flocculent storage tank 20 is used for collecting and storing floccules. The isolation net 21 is provided at the connection between the flocculent storage tank 20 and the sedimentation tank 1. The isolation net 21 is used to prevent the floccules from being guided out of the flocculent storage tank 20 by the vortex.

[0032] When the flocs float on the surface of the sewage, they will move along the inner wall of the sedimentation tank 1 with the vortex. It is worth noting that the liquid level of the sewage is higher than the bottom of the floc storage tank 20, so that the flocs move with the flow of the vortex and enter the floc storage tank 20 along the inner wall of the sedimentation tank 1 through the centrifugal force generated during its own movement. The flow of the vortex in the sedimentation tank 1 will drive the sewage in the floc storage tank 20 to flow in the same direction, so that the flow of the sewage in the floc storage tank 20 drives the flocs to approach the isolation net 21 and be intercepted by the isolation net 21, so that the flocs gather at the isolation net 21, and the sewage flows back to the sedimentation tank 1 through the isolation net 21, which is convenient for the staff to centrally treat the flocs, thereby improving the staff's treatment efficiency of suspended matter, and allowing the staff to directly observe the sewage surface, which is helpful for the staff to observe the sewage quality. When the clarity of the sewage meets the requirements of subsequent processes, the staff will discharge the sewage in the sedimentation tank 1 through the sewage outlet of the sedimentation tank 1, completing the discharge of the treated sewage in the sedimentation tank 1.

[0033] Among them, such as Figure 2 and Figure 12 As shown, the device also includes a bubble nozzle 22. A plurality of bubble nozzles 22 are provided at the bottom of the sedimentation tank 1 for generating a large number of tiny bubbles at the bottom of the sedimentation tank 1, thereby accelerating the speed at which the flocculants adhere to the suspended matter in the sewage and accelerating the floating of the flocculants.

[0034] While the venturi 3 is spraying flocculant, the staff can also start the bubble nozzle 22 to spray bubbles. On the one hand, the bubbles will contact and use their own surface to protect the flocculants, and promote the rise of the flocculants through buoyancy. On the other hand, they will adhere to the suspended matter in the sewage through their own surface, thereby further improving the sewage treatment efficiency. It is worth noting that although the bubbles will be broken up by the rotation of the fan blades 17 during the rising process, the total volume of the bubbles does not change, so that the buoyancy generated by the bubbles to displace the sewage does not change, so that the bubbles can effectively drive the flocculants to rise in the sewage.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A sewage treatment device for a water conservancy project, comprising: a sedimentation tank (1); a rotating outer cylinder (2), wherein the bottom of the sedimentation tank (1) is movably provided with a rotating outer cylinder (2); a venturi tube (3), wherein a plurality of venturi tubes (3) are provided on the outer wall of the rotating outer cylinder (2), and the venturi tube (3) is provided with a flocculant feed port (301) and an air feed port (302); a first pipe (303), wherein the flocculant feed port (301) is connected to the first pipe (303); a gas-liquid slip ring (304), wherein the bottom of the sedimentation tank (1) is provided with a gas-liquid slip ring (304) connected to the first pipe (303); a second pipe (305), wherein the air feed port (302) is connected to the second pipe (305) connected to the gas-liquid slip ring (304); a support and protection unit, wherein a support and protection unit for supporting the venturi tube (3) is provided inside the rotating outer cylinder (2); A sealing adjustment unit, wherein a sealing adjustment unit for adjusting the start-up state of the venturi tube (3) is provided inside the rotating outer cylinder (2); a speed-changing rotation unit, wherein a speed-changing rotation unit for driving the venturi tube (3) to rotate at a variable speed is provided at the top end inside the rotating outer cylinder (2); a stirring rotation unit, wherein a plurality of stirring rotation units for mixing sewage and flocculants are provided on the outer wall of the rotating outer cylinder (2); a flocculation storage unit, wherein a flocculation storage unit for collecting and storing flocculation groups is provided on the inner wall of the sedimentation tank (1).

2. A sewage treatment device for a water conservancy project according to claim 1, characterized in that: The support and protection unit comprises: a support rod (4), wherein a plurality of support rods (4) are provided inside the rotating outer cylinder (2); and a rotating inner cylinder (5), wherein a plurality of the support rods (4) are fixedly connected to the rotating inner cylinder (5), and the rotating inner cylinder (5) is fixedly connected to a plurality of the Venturi tubes (3) in a through-type manner.

3. A sewage treatment device for a water conservancy project according to claim 2, characterized in that: The sealing adjustment unit includes: a cam column (6), a cam column (6) is rotatably provided in the rotating inner cylinder (5), the cam column (6) is fixedly connected to the sedimentation tank (1), and a plurality of cam grooves (601) are provided on the outer wall of the cam column (6), and the cam grooves (601) correspond to a plurality of the venturi tubes (3) at the same height; a stepped sealing plug (7), a stepped sealing plug (7) is slidably provided in the venturi tube (3), and one end of the stepped sealing plug (7) is in contact with the cam groove (601); a first spring (8), a first spring (8) is provided on the stepped sealing plug (7), and one end of the first spring (8) is fixedly connected to the venturi tube (3).

4. A sewage treatment device for a water conservancy project according to claim 3, characterized in that: The speed-changing rotation unit comprises: a support shell (9), wherein the support shell (9) is provided on the top of the cam column (6); a motor (10), wherein the motor (10) is provided in the support shell (9), and the output shaft of the motor (10) passes through the support shell (9); an eccentric disk (11), wherein the eccentric disk (11) is provided on the output shaft of the motor (10); a movable frame (12), wherein the movable frame (12) is movably provided on the eccentric disk (11), wherein a horizontal slide groove is provided at the center of the movable frame (12), and the eccentric shaft of the eccentric disk (11) is located inside the horizontal slide groove; a limiting frame (13), wherein the limiting frames (13) are symmetrically provided on the support shell (9), and the tops of the symmetrically provided limiting frames (13) are slidably connected to the movable frame (12) together.

5. A sewage treatment device for a water conservancy project according to claim 4, characterized in that: The speed-changing rotation unit further comprises: a ratchet bar (14), wherein a guide groove (121) is provided in a rectangular distribution on the inner side of the movable frame (12), and ratchet bars (14) are provided in two opposite guide grooves (121) for sliding together; a second spring (15), wherein a plurality of second springs (15) are provided on one side of the ratchet bar (14), and one end of the plurality of second springs (15) is fixedly connected to the movable frame (12); a ratchet wheel (16), wherein a ratchet wheel (16) is provided at the top end inside the rotating outer cylinder (2), and the ratchet wheel (16) is engaged with the ratchet bar (14).

6. The sewage treatment device for a water conservancy project according to claim 1, characterized in that: It also includes: a lower wave ring (101), the bottom of the sedimentation tank (1) is fixedly connected to the lower wave ring (101); an upper wave ring (201), the bottom of the rotating outer cylinder (2) is fixedly connected to the upper wave ring (201), and the upper wave ring (201) is in contact with the lower wave ring (101).

7. A sewage treatment device for a water conservancy project according to claim 6, characterized in that: The stirring and rotating unit comprises: fan blades (17), and a plurality of fan blades (17) are provided on the circumferential outer wall of the rotating outer cylinder (2).

8. A sewage treatment device for a water conservancy project according to claim 7, characterized in that: The stirring and rotating unit further comprises: a brush row (18), one end of the fan blade (17) being slidably provided with the brush row (18); and a third spring (19), one end of the brush row (18) being provided with the third spring (19), one end of the third spring (19) being fixedly connected to the fan blade (17).

9. The sewage treatment device for a water conservancy project according to claim 1, characterized in that: The flocculation storage unit comprises: a flocculent storage tank (20), the flocculent storage tank (20) being arranged on the inner wall of the sedimentation tank (1) in a mirror-image distribution, the flocculent storage tank (20) being used to collect and store flocculent masses; an isolation net (21), an isolation net (21) being arranged at the connection point between the flocculent storage tank (20) and the sedimentation tank (1), the isolation net (21) being used to prevent the flocculent masses from being guided out of the flocculent storage tank (20) by a vortex.

10. The sewage treatment device for a water conservancy project according to claim 1, characterized in that: It also includes: a bubble nozzle (22), and a plurality of bubble nozzles (22) are provided at the bottom of the sedimentation tank (1).

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