Sewage treatment device and method based on flocculation treatment

Abstract

The invention discloses a sewage treatment device and method based on flocculation treatment, and relates to the technical field of sewage treatment.The sewage treatment device comprises a tank body, a rotating rod is movably connected to the interior of the tank body, a stirring mechanism and a collecting mechanism are installed on the two sides of the rotating rod respectively, and a transmission mechanism is installed on the upper portion of the interior of the tank body; the transmission mechanism is located above the stirring mechanism and the collecting mechanism, a motor is fixedly connected to the center of the bottom of the tank body, and an output shaft of the motor is fixedly connected with the tail end of a rotating rod; the rotating rod is driven by the motor to rotate, so that the stirring mechanism and the collecting mechanism can be driven to revolve in the tank body, flocs in sewage in the tank body can be filtered out through the filtering net basket when the collecting mechanism revolves, the flocs are all left in the filtering net basket to be collected, and the flocculation stage in the sewage is preliminarily filtered; therefore, the precipitation time can be shortened when the sewage enters the next precipitation stage, and the overall sewage treatment efficiency is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and particularly relates to a sewage treatment device and method based on flocculation treatment. Background Technique

[0002] The role of flocculation in sewage treatment is to make the suspended particles in water coagulate into larger flocs through adsorption, bridging and electro-neutralization effects, so as to accelerate the solid-liquid separation and improve the water treatment efficiency;

[0003] Sewage treatment needs to go through multiple steps. Flocculation treatment is one of them. By adding an appropriate amount of flocculant to the sewage, and then fully mixing the flocculant with the sewage to coagulate the flocs, and then it can be discharged for the next precipitation and filtration operations;

[0004] However, in the above steps, only flocculant is added in the flocculation step without other auxiliary operations. Therefore, more time is required for floc precipitation in the precipitation and filtration stages, and this situation will greatly reduce the overall efficiency of sewage treatment and is very inconvenient to use;

[0005] To solve the above problems, the present application proposes a sewage treatment device and method based on flocculation treatment. Summary of the Invention

[0006] The present invention provides a sewage treatment device and method based on flocculation treatment to solve the above technical problems.

[0007] To solve the above technical problems, a sewage treatment device based on flocculation treatment provided by the present invention includes a tank body, a rotating rod is movably connected inside the tank body, a stirring mechanism and a collecting mechanism are respectively installed on both sides of the rotating rod, a transmission mechanism is installed above the inside of the tank body, the transmission mechanism is located above the stirring mechanism and the collecting mechanism, a motor is fixedly connected to the center of the bottom of the tank body, and the output shaft of the motor is fixedly connected to the end of the rotating rod.

[0008] Preferably, the transmission mechanism includes a toothed ring, the central axis of the toothed ring coincides with the central axis of the rotating rod, a plurality of suspension rods are fixedly connected to the top of the toothed ring, and a first gear and a second gear are respectively meshed and connected to both sides of the toothed ring.

[0009] Preferably, the toothed ring is composed of a first arc-shaped rack and a second arc-shaped rack, the first arc-shaped rack is located on one side of the second arc-shaped rack, and a plurality of the suspension rods are respectively fixedly connected to the tops of the first arc-shaped rack and the second arc-shaped rack.

[0010] Preferably, the stirring mechanism includes two mounting brackets I distributed vertically. The mounting bracket I is fixedly connected to one side of the rotating rod. A shaft rod is movably connected between the two mounting brackets I. Two stirring paddles distributed vertically are fixedly connected to the outer end of the shaft rod. The stirring paddles are located between the two mounting brackets I. The shaft rod penetrates through one of the mounting brackets I located above, and the gear I is fixedly connected to the top end of the shaft rod.

[0011] Preferably, the collection mechanism includes a filter basket and two mounting brackets II distributed vertically. A plurality of L-shaped inserts are fixedly connected to the front side of the filter basket. Two jacks are opened at the top of the mounting bracket II. The L-shaped inserts penetrate through the jacks, and the filter basket is mounted on the rear sides of the two mounting brackets II through the jacks and the L-shaped inserts. The gear II is located above the filter basket. An opening is opened on the front side of the filter basket. The opening is located between the plurality of L-shaped inserts. Two handles are fixedly connected to the top of the filter basket.

[0012] Preferably, a reciprocating lead screw is movably connected inside the filter basket. The top of the reciprocating lead screw penetrates through the filter basket and extends above the filter basket, and the gear II is fixedly connected to the top end of the reciprocating lead screw. A scraper is fixedly sleeved on the outer end of the lead screw slider of the reciprocating lead screw. The scraper is located inside the filter basket, and the rear side and both sides of the scraper are in contact with the inner side wall of the filter basket.

[0013] Preferably, two mounting strips distributed vertically are fixedly connected to the front side inside the filter basket. The opening is located between the two mounting strips. A plurality of baffles are movably connected between the two mounting strips through torsion spring shafts. The baffles are located behind the opening and are used to block the opening. The baffles are located in front of the scraper.

[0014] Preferably, the top of the tank body is movably connected with a tank cover through a hinge. The arc-shaped rack I and the arc-shaped rack II are respectively fixedly connected to the top end inside the tank body and below the tank cover through a plurality of suspension rods.

[0015] Preferably, a water inlet pipe and a feeding pipe are fixedly connected to one side of the top of the tank body away from the tank cover. A drain pipe and a plurality of support legs are fixedly connected to the bottom of the tank body. The plurality of support legs are distributed in a circular array along the central axis of the tank body at the bottom edge of the tank body. The drain pipe is located on one side of the motor and is located between two adjacent support legs.

[0016] A sewage treatment method based on flocculation treatment includes the following steps:

[0017] S1. Add sewage and flocculant into the tank body through the water inlet pipe and the feeding pipe;

[0018] S2. Start the motor. The output shaft of the motor drives the rotating rod to rotate. Subsequently, the rotating rod will drive the stirring mechanism and the collecting mechanism to revolve around the central axis of the rotating rod inside the tank body. The meshing transmission between the toothed ring and the first gear and the second gear in the transmission mechanism can drive the shaft rod and the reciprocating lead screw to rotate self - rotatably;

[0019] S3. While the stirring mechanism is revolving as a whole, it will also drive the stirring paddle to rotate through the self - rotation of the shaft rod to accelerate the mixing and reaction speed of the sewage and the flocculant in the tank body;

[0020] S4. When flocculation reaction occurs in the sewage in the tank body, as the collecting mechanism rotates in the tank body, multiple baffles used to block the opening on the filter basket will be pushed open by water, enabling the sewage to enter the inside of the filter basket for filtration. Thus, the flocs in the sewage are filtered and collected inside the filter basket. During this period, when the reciprocating lead screw rotates, the scraper will move up and down along the reciprocating lead screw with the screw slider, thereby scraping off the flocs attached to the inner wall of the filter basket to avoid blockage and affecting the filtration effect;

[0021] S5. After the treatment is completed, the device stops running. Subsequently, the treated sewage is discharged through the drain pipe. During this period, since the baffle is no longer pushed by the water flow, it will automatically return to its original position through the torsion spring shaft at the end to block the opening, and the flocs are left inside the filter basket and cannot flow away with the sewage;

[0022] S6. Lift the tank cover. At this time, the arc - shaped rack part in the toothed ring will no longer block above the collecting mechanism. Therefore, hold the handle and lift the filter basket until the L - shaped plug is pulled out from the jack on the second mounting bracket. At this time, the filter basket can be lifted without obstruction and taken out of the tank body to facilitate the cleaning of the flocs collected in the filter basket.

[0023] Compared with the related technology, a sewage treatment device and method based on flocculation treatment provided by the present invention has the following beneficial effects:

[0024] 1. By driving the rotating rod to rotate through the motor, the stirring mechanism and the collecting mechanism can revolve in the tank body. When the collecting mechanism revolves, it can filter out the flocs in the sewage in the tank body through the filter basket and collect all the flocs inside the filter basket. The sewage is preliminarily filtered during the flocculation stage, so that the precipitation time can be reduced when the sewage enters the next precipitation stage, thereby improving the overall efficiency of sewage treatment work;

[0025] 2. During the revolution of the stirring mechanism and the collecting mechanism, the self - rotation of the stirring mechanism can be driven through the transmission cooperation of the transmission mechanism. The combination of the revolution and self - rotation of the stirring mechanism can fully mix the sewage and the flocculant in the tank body, improving the sewage treatment efficiency. At the same time, the transmission mechanism will also drive the reciprocating lead screw in the collecting mechanism to rotate, so that the scraper can scrape off the flocs on the inner wall of the filter basket to avoid blockage, which is very convenient to use. Description of the Drawings

[0026] Figure 1 is the overall structural schematic diagram of the present invention;

[0027] Figure 2 is the overall front sectional structural schematic diagram of the present invention;

[0028] Figure 3 is the structural schematic diagram of the second mounting bracket of the present invention;

[0029] Figure 4 is the structural schematic diagram of the filter basket of the present invention;

[0030] Figure 5 is the side sectional structural schematic diagram of the filter basket of the present invention;

[0031] Figure 6 is the structural schematic diagram of the baffle of the present invention;

[0032] Figure 7 is the structural schematic diagram of the open state of the baffle of the present invention;

[0033] Figure 8 is the structural schematic diagram of the closed state of the baffle of the present invention;

[0034] Figure 9 is the structural schematic diagram of the lifted state of the tank cover of the present invention.

[0035] Reference numerals in the figure: 1, tank body; 2, rotating rod; 3, first mounting bracket; 4, shaft rod; 5, stirring paddle; 6, first gear; 7, second mounting bracket; 8, jack; 9, filter basket; 10, L-shaped insertion block; 11, opening; 12, mounting strip; 13, baffle; 14, scraping plate; 15, reciprocating lead screw; 16, second gear; 17, toothed ring; 171, first arc-shaped rack; 172, second arc-shaped rack; 18, tank cover; 19, motor; 20, water inlet pipe; 21, feeding pipe; 22, drain pipe; 23, handle; 24, suspension rod. Detailed implementation manners

[0036] Example, provided by Figures 1-9 A sewage treatment device based on flocculation treatment, comprising a tank body 1, wherein a rotating rod 2 is movably connected inside the tank body 1, a stirring mechanism and a collecting mechanism are respectively installed on both sides of the rotating rod 2, a transmission mechanism is installed above the inside of the tank body 1, the transmission mechanism is located above the stirring mechanism and the collecting mechanism, a motor 19 is fixedly connected to the center of the bottom of the tank body 1, and the output shaft of the motor 19 is fixedly connected to the end of the rotating rod 2.

[0037] The transmission mechanism includes a toothed ring 17. The central axis of the toothed ring 17 coincides with the central axis of the rotating rod 2. A plurality of suspension rods 24 are fixedly connected to the top of the toothed ring 17. A first gear 6 and a second gear 16 are respectively meshed and connected to both sides of the toothed ring 17. When the stirring mechanism and the collection mechanism revolve, the first gear 6 and the second gear 16 in the transmission mechanism will follow and rotate around the toothed ring 17.

[0038] The toothed ring 17 is composed of a first arc-shaped rack 171 and a second arc-shaped rack 172. The first arc-shaped rack 171 is located on one side of the second arc-shaped rack 172. A plurality of the suspension rods 24 are respectively fixedly connected to the tops of the first arc-shaped rack 171 and the second arc-shaped rack 172. The toothed ring 17 is of a split design, so that when the tank cover 18 is lifted, the toothed ring 17 (i.e., the second arc-shaped rack 172) above the collection mechanism can be lifted accordingly, avoiding blocking the cleaning flocs extracted on the filter basket 9 in the collection mechanism.

[0039] The stirring mechanism includes two upper and lower mounting brackets 3. The mounting brackets 3 are fixedly connected to one side of the rotating rod 2. A shaft rod 4 is movably connected between the two mounting brackets 3. Two upper and lower stirring paddles 5 are fixedly connected to the outer end of the shaft rod 4. The stirring paddles 5 are located between the two mounting brackets 3. The shaft rod 4 penetrates through one of the upper mounting brackets 3, and the first gear 6 is fixedly connected to the top end of the shaft rod 4. While revolving, the stirring mechanism will also rotate itself under the transmission of the transmission mechanism, that is, the shaft rod 4 drives the two stirring paddles 5 to stir the sewage, so as to improve the mixing speed and mixing effect of the flocculant and the sewage, and further improve the sewage treatment efficiency.

[0040] The collection mechanism includes a filter basket 9 and two upper and lower mounting brackets 7. A plurality of L-shaped inserts 10 are fixedly connected to the front side of the filter basket 9. Two jacks 8 are opened at the top of the mounting brackets 7. The L-shaped inserts 10 penetrate through the jacks 8, and the filter basket 9 is installed on the rear sides of the two mounting brackets 7 through the jacks 8 and the L-shaped inserts 10. The second gear 16 is located above the filter basket 9. An opening 11 is opened on the front side of the filter basket 9. The opening 11 is located between the plurality of L-shaped inserts 10. Two handles 23 are fixedly connected to the top of the filter basket 9. When the collection mechanism revolves, the filter basket 9 can continuously filter the sewage, so that the flocs in the sewage are filtered and left inside the filter basket 9. At this stage, the flocs are preliminarily filtered and cleaned, which can improve the time of the next precipitation step and further improve the overall sewage treatment work efficiency. The filter basket 9 is fixed by inserting a plurality of L-shaped inserts 10 into the jacks 8 on the mounting brackets 7. The L-shaped inserts 10 are in interference fit when inserted into the jacks 8. Coupled with the self-weight of the filter basket 9 and its internal structure, the filter basket 9 will not move up randomly and become disengaged from the mounting brackets 7.

[0041] A reciprocating lead screw 15 is movably connected inside the filter basket 9. The top of the reciprocating lead screw 15 penetrates through the filter basket 9 and extends above the filter basket 9. And the second gear 16 is fixedly connected to the top end of the reciprocating lead screw 15. A scraper 14 is fixedly sleeved on the outer end of the lead screw slider of the reciprocating lead screw 15. The scraper 14 is located inside the filter basket 9. And the rear side and both sides of the scraper 14 are in contact with the inner side wall of the filter basket 9. When the filter basket 9 filters the flocs in the sewage, the transmission mechanism can drive the reciprocating lead screw 15 to rotate. During this period, the scraper 14 will repeatedly move up and down along the reciprocating lead screw 15. And the scraper 14 will scrape off the flocs attached to the inner wall of the filter basket 9, preventing the filter basket 9 from being blocked and affecting the water filtration effect.

[0042] Two vertically distributed mounting strips 12 are fixedly connected to the front side inside the filter basket 9. The opening 11 is located between the two mounting strips 12. A plurality of baffles 13 are movably connected between the two mounting strips 12 through torsion spring shafts. The baffles 13 are located behind the opening 11 and are used to block the opening 11. The baffles 13 are located in front of the scraper 14. When the filter basket 9 rotates for water filtration, due to the water flow resistance, a plurality of baffles 13 will be pushed to open at a certain angle, so that sewage can enter the filter basket 9 for filtration. When the operation stops, the torsion spring between the baffle 13 and the mounting strip 12 will drive the baffle 13 to rotate back to its original position. When a plurality of baffles 13 return to their original positions simultaneously, the opening 11 can be blocked. Thus, the flocs in the filter basket 9 will not be discharged together when the sewage is discharged, but will only be left in the filter basket 9. And the torsion spring shaft connecting the mounting strip 12 and the top plate 13 is to install a torsion spring on the shaft to achieve the purpose that the baffle 13 can return to its position without external force.

[0043] The top of the tank body 1 is movably connected with a tank cover 18 through a hinge. The first arc-shaped rack 171 and the second arc-shaped rack 172 are respectively fixedly connected to the top end inside the tank body 1 and below the tank cover 18 through a plurality of suspension rods 24. Opening the cover plate 18 can lift the second arc-shaped rack 172 together, so that when lifting the filter basket 9 out of the tank body 1 through the handle 23, it will not be interfered by the toothed ring 17.

[0044] A water inlet pipe 20 and a feeding pipe 21 are fixedly connected to one side of the top of the tank body 1 away from the tank cover 18. A drain pipe 22 and a plurality of support legs are fixedly connected to the bottom of the tank body 1. The plurality of support legs are annularly arrayed at the bottom edge of the tank body 1 with the central axis of the tank body 1. The drain pipe 22 is located on one side of the motor 19. And the drain pipe 22 is located between two adjacent support legs. Sewage can be added into the tank body 1 through the water inlet pipe 20, and a flocculant can be added into the tank body 1 through the feeding pipe 21. During the flocculation stage, the drain pipe 22 is in a closed state and cannot drain water. The drainage function can be closed through a valve (not shown in the figure). After the flocculation treatment is completed, the valve can be opened to drain the sewage through the drain pipe 22.

[0045] A sewage treatment method based on flocculation treatment, comprising the following steps:

[0046] S1. Add sewage and flocculant into the tank body 1 through the water inlet pipe 20 and the feeding pipe 21;

[0047] S2. Start the motor 19, the output shaft of the motor 19 drives the rotating rod 2 to rotate, and then the rotating rod 2 drives the stirring mechanism and the collecting mechanism to revolve around the central axis of the rotating rod 2 inside the tank body 1. Through the meshing transmission of the toothed ring 17, the first gear 6 and the second gear 16 in the transmission mechanism, the shaft rod 4 and the reciprocating lead screw 15 can be driven to rotate self - rotatably;

[0048] S3. While the stirring mechanism is revolving as a whole, it also drives the stirring paddle 5 to rotate through the self - rotation of the shaft rod 4 to accelerate the mixing and reaction speed of the sewage and the flocculant in the tank body 1;

[0049] S4. When flocculation reaction occurs in the sewage in the tank body 1, as the collecting mechanism rotates in the tank body 1, a plurality of baffles 13 used to block the opening 11 on the filter basket 9 will be pushed open by water, so that the sewage enters the inside of the filter basket 9 to be filtered, and thus the flocs in the sewage are filtered and collected inside the filter basket 9. During this period, when the reciprocating lead screw 15 rotates, the scraper 14 will move up and down along the reciprocating lead screw 15 with the screw slider, so as to scrape off the flocs attached to the inner wall of the filter basket 9 to avoid blockage and affect the filtering effect;

[0050] S5. After the treatment is completed, the device stops running, and then the treated sewage is discharged through the drain pipe 22. During this period, the baffle 13 is no longer pushed by the water flow, and then it will automatically return to its original position through the torsion spring shaft at the end to block the opening 11, and the flocs are left inside the filter basket 9 and cannot flow away with the sewage;

[0051] S6. Lift the tank cover 18. At this time, the arc - shaped rack two 172 part in the toothed ring 17 will no longer block above the collecting mechanism. Therefore, hold the handle 23 and lift the filter basket 9 until the L - shaped insert block 10 is pulled out from the jack 8 on the mounting bracket two 7. At this time, the filter basket 9 can be lifted without obstruction and taken out of the tank body 1 to facilitate the cleaning of the flocs collected in the filter basket 9.

[0052] Working principle:

[0053] Sewage and flocculant are added into the tank body 1 through the water inlet pipe 20 and the feeding pipe 21. The motor 19 is started, and the output shaft of the motor 19 drives the rotating rod 2 to rotate. Subsequently, the rotating rod 2 drives the stirring mechanism and the collecting mechanism to revolve around the central axis of the rotating rod 2 inside the tank body 1. Through the meshing transmission of the gear ring 17 with the first gear 6 and the second gear 16 in the transmission mechanism, the shaft rod 4 and the reciprocating lead screw 15 can be driven to rotate self - rotatably. While the stirring mechanism is revolving as a whole, it will also drive the stirring paddle 5 to rotate through the self - rotation of the shaft rod 4 to accelerate the mixing and reaction speed of the sewage and the flocculant in the tank body 1. When flocculation reaction occurs in the sewage in the tank body 1, as the collecting mechanism rotates in the tank body 1, a plurality of baffles 13 used to block the opening 11 on the filter basket 9 will be pushed open by water, enabling the sewage to enter the inside of the filter basket 9 for filtration, so as to filter and collect the flocculants in the sewage inside the filter basket 9. During this period, when the reciprocating lead screw 15 rotates, the scraper 14 will reciprocate up and down along the reciprocating lead screw 15 with the screw slider, so as to scrape off the flocculants attached to the inner wall of the filter basket 9 to avoid blockage and affect the filtration effect. After the treatment is completed, the device stops running. Subsequently, the treated sewage is discharged through the drain pipe 22. During this period, since the baffle 13 is no longer pushed by the water flow, it will automatically return to its original position through the torsion spring shaft at the end to block the opening 11, and the flocculants are left inside the filter basket 9 and cannot flow away with the sewage. The tank cover 18 is lifted. At this time, the arc - shaped rack two 172 part in the gear ring 17 will no longer block above the collecting mechanism. Therefore, hold the handle 23 and lift the filter basket 9 until the L - shaped plug 10 is pulled out from the jack 8 on the mounting bracket two 7. At this time, the filter basket 9 can be lifted without obstruction and taken out from the tank body 1 to facilitate the cleaning of the flocculants collected in the filter basket 9.

Claims

1. A sewage treatment device based on flocculation treatment, comprising a tank (1), characterized in that: A rotating rod (2) is movably connected inside the tank body (1), and a stirring mechanism and a collecting mechanism are respectively installed on both sides of the rotating rod (2). A transmission mechanism is installed above the inside of the tank body (1), and the transmission mechanism is located above the stirring mechanism and the collecting mechanism. A motor (19) is fixedly connected at the center of the bottom of the tank body (1), and the output shaft of the motor (19) is fixedly connected to the end of the rotating rod (2).

2. A sewage treatment device based on flocculation treatment according to claim 1, characterized in that: The transmission mechanism comprises a gear ring (17), the central axis of the gear ring (17) coincides with the central axis of the rotating rod (2), a plurality of suspension rods (24) are fixedly connected to the top of the gear ring (17), and gear one (6) and gear two (16) are respectively meshed and connected on both sides of the gear ring (17).

3. A sewage treatment device based on flocculation treatment according to claim 2, characterized in that: The gear ring (17) is composed of an arc-shaped rack one (171) and an arc-shaped rack two (172), wherein the arc-shaped rack one (171) is located on one side of the arc-shaped rack two (172), and a plurality of suspension rods (24) are respectively fixedly connected to the tops of the arc-shaped rack one (171) and the arc-shaped rack two (172).

4. A sewage treatment device based on flocculation treatment according to claim 2, characterized in that: The stirring mechanism comprises two mounting brackets (3) distributed vertically, the mounting brackets (3) being fixedly connected to one side of the rotating rod (2), a shaft (4) being movably connected between the two mounting brackets (3), two stirring paddles (5) distributed vertically being fixedly connected to the outer ends of the shaft (4), the stirring paddles (5) being located between the two mounting brackets (3), the shaft (4) penetrating the mounting bracket (3) located at the top, and the gear (6) being fixedly connected to the top end of the shaft (4).

5. A sewage treatment device based on flocculation treatment according to claim 2, characterized in that: The collecting mechanism comprises a filter basket (9) and two mounting brackets (7) distributed up and down, a plurality of L-shaped plug blocks (10) are fixedly connected to the front side of the filter basket (9), two plug holes (8) are provided on the top of the mounting bracket (7), the L-shaped plug blocks (10) pass through the plug holes (8), and the filter basket (9) is installed on the rear side of the two mounting brackets (7) through the plug holes (8) and the L-shaped plug blocks (10), the gear (16) is located above the filter basket (9), an opening (11) is provided on the front side of the filter basket (9), the opening (11) is located between the plurality of L-shaped plug blocks (10), and two handles (23) are fixedly connected to the top of the filter basket (9).

6. A sewage treatment device based on flocculation treatment according to claim 5, characterized in that: A reciprocating screw (15) is movably connected inside the filter basket (9), the top of the reciprocating screw (15) passes through the filter basket (9) and extends above the filter basket (9), and the second gear (16) is fixedly connected to the top of the reciprocating screw (15), and a scraper (14) is fixedly sleeved on the outer end of the screw slider of the reciprocating screw (15), and the scraper (14) is located inside the filter basket (9), and the rear side and both sides of the scraper (14) are in contact with the inner wall of the filter basket (9).

7. A sewage treatment device based on flocculation treatment according to claim 6, characterized in that: The front side of the filter basket (9) is fixedly connected to two mounting strips (12) distributed up and down, the opening (11) is located between the two mounting strips (12), and a plurality of baffles (13) are movably connected between the two mounting strips (12) via a torsion spring rotating shaft, the baffles (13) are located at the rear side of the opening (11) and are used to block the opening (11), and the baffles (13) are located in front of the scraper (14).

8. A sewage treatment device based on flocculation treatment according to claim 3, characterized in that: The top of the tank body (1) is movably connected to a tank cover (18) via a hinge, and the arc-shaped rack 1 (171) and the arc-shaped rack 2 (172) are respectively fixedly connected to the top of the tank body (1) and the bottom of the tank cover (18) via a plurality of suspension rods (24).

9. A sewage treatment device based on flocculation treatment according to claim 8, characterized in that: A water inlet pipe (20) and a feeding pipe (21) are fixedly connected to the side of the top of the tank body (1) away from the tank cover (18), and a drain pipe (22) and a plurality of supporting legs are fixedly connected to the bottom of the tank body (1). The plurality of supporting legs are distributed in a circular array at the bottom edge of the tank body (1) with the center axis of the tank body (1). The drain pipe (22) is located on one side of the motor (19), and the drain pipe (22) is located between two adjacent supporting legs.

10. A sewage treatment method based on flocculation treatment, applicable to a sewage treatment device based on flocculation treatment according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1, adding sewage and flocculant into the tank (1) through the water inlet pipe (20) and the feed pipe (21); S2, starting the motor (19), the output shaft of the motor (19) drives the rotating rod (2) to rotate, and then the rotating rod (2) drives the stirring mechanism and the collecting mechanism to revolve around the central axis of the rotating rod (2) inside the tank body (1), and the meshing transmission of the gear ring (17) and the gear 1 (6) and the gear 2 (16) in the transmission mechanism can drive the shaft (4) and the reciprocating screw (15) to rotate; S3, the stirring mechanism will also drive the stirring paddle (5) to rotate by the shaft (4) while the stirring mechanism is revolving as a whole, so as to accelerate the mixing and reaction speed of the sewage and flocculant in the tank (1); S4, when the sewage in the tank body (1) undergoes flocculation reaction, as the collecting mechanism rotates in the tank body (1), the multiple baffles (13) on the filter basket (9) for blocking the opening (11) will be pushed away by the water, allowing the sewage to enter the filter basket (9) and be filtered, thereby filtering and collecting the flocculants in the sewage inside the filter basket (9). During this period, the reciprocating screw (15) rotates, causing the scraper (14) to move up and down along the reciprocating screw (15) along with the screw slider, thereby scraping off the flocculants attached to the inner wall of the filter basket (9) to avoid clogging and affecting the filtering effect; S5, after the treatment is completed, the device stops running, and then the treated sewage is discharged through the drain pipe (22). During this period, the baffle (13) is no longer pushed by the water flow, and the torsion spring shaft at the end automatically returns to block the opening (11), and the flocculants are retained in the filter basket (9) and cannot flow away with the sewage; S6. Open the tank cover (18). At this time, the arc-shaped rack part (172) in the gear ring (17) will no longer block the upper part of the collecting mechanism. Therefore, the filter basket (9) is lifted up by holding the handle (23) until the L-shaped plug (10) is pulled out of the insertion hole (8) on the second mounting bracket (7). At this time, the filter basket (9) can be lifted up and removed from the tank body (1) without any obstruction, so as to clean the flocculants collected in the filter basket (9).

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