Precipitation separation device for sewage treatment

Abstract

A disclosed precipitation separation apparatus for sewage treatment comprises a supporting frame body, a sewage precipitation separation cylinder and a sewage stirring device are installed on the supporting frame body, the sewage stirring device comprises a stirring driving device, a stirring shaft and stirring blades, the output end of the stirring driving device is connected to the top end of the stirring shaft, and the output end of the stirring driving device is connected to the top end of the stirring shaft; the stirring blade is fixed on the peripheral surface of the stirring shaft, the outer side edge of the stirring blade extends upwards to form a mounting plate, a cylinder wall scraping plate is detachably mounted on the mounting plate, and the outer side edge of the cylinder wall scraping plate is attached to the inner side wall of the sewage precipitation separation cylinder; a coagulant or a flocculating agent is added into the sewage precipitation separation cylinder, air is fed into sewage in the sewage precipitation separation cylinder through the central shaft with the hollow structure and the aeration plate, and the contact probability of the coagulant or the flocculating agent and the sewage is increased by continuously aerating the sewage; the precipitation efficiency of sewage in the sewage precipitation separation barrel is improved.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment equipment, and in particular to a sedimentation separation device for sewage treatment. Background Art

[0002] Sedimentation tank is a kind of means used for sewage treatment. Coagulation sedimentation tank is to inject coagulant or flocculant and coagulant aid into the sewage in the sedimentation tank. The coagulant or flocculant and coagulant aid make the particles in the water that are difficult to precipitate aggregate with each other to form colloid, and then combine with impurities in the water to form larger floccules. Floccules have strong adsorption capacity and can not only adsorb suspended matter, but also some bacteria and soluble substances. Through adsorption, the floccules increase in volume and sink, which has a good sedimentation effect.

[0003] In the Chinese utility model patent document with the announcement number CN209367896U, a sewage coagulation sedimentation separation device for sewage treatment is disclosed. The device adds a coagulant or flocculant to the wastewater collection box to make harmful substances condense and then turn into a large colloid. By setting a collection net and a connecting plate, the condensed colloidal waste in the wastewater can be filtered and cleaned. When adding a coagulant or flocculant, the agent should be fully mixed with the wastewater to fully react and then more thoroughly treat the waste contained in the wastewater. The above-mentioned sedimentation separation device lacks aeration equipment. In the absence of aeration equipment, the reaction speed between sewage and coagulant or flocculant is slow during the sewage treatment process, resulting in poor sewage sedimentation separation effect, which is not conducive to the solid-liquid separation process of sewage. Therefore, the above-mentioned sewage coagulation sedimentation separation device affects the sewage treatment efficiency.

[0004] Therefore, a sedimentation separation device for sewage treatment has become an urgent problem to be solved by the whole society. Summary of the invention

[0005] In order to solve the above technical problems, the technical solution provided by the present invention is as follows: a sedimentation separation device for sewage treatment, comprising a support frame, a sewage sedimentation separation cylinder and a sewage stirring device are installed on the support frame, the sewage stirring device comprises a stirring drive device, a stirring shaft and a stirring blade, the output end of the stirring drive device is connected to the top of the stirring shaft, the stirring blade is fixed to the outer peripheral surface of the stirring shaft, the outer edge of the stirring blade extends upward to form a mounting plate, a cylinder wall scraper is detachably mounted on the mounting plate, and the outer edge of the cylinder wall scraper is in contact with the inner wall of the sewage sedimentation separation cylinder;

[0006] An aeration device is arranged inside the sewage sedimentation and separation cylinder, and the aeration device comprises an aeration plate, a central shaft and a rotation driving device, the rotation driving device is used to be connected to the top of the central shaft, the aeration plate is installed on the central shaft, the central shaft is a hollow tubular structure, the bottom end of which is in plane communication with the aeration plate, an air supply pipe is arranged inside the central shaft, an air supply component is installed on the top end of the air supply pipe, and the bottom end of the air supply pipe is arranged inside the aeration plate, and an aeration hole is arranged at the bottom end of the aeration plate;

[0007] A lifting and adjusting device is arranged at the bottom end of the sewage sedimentation and separation cylinder, and the lifting and adjusting device comprises a lifting and adjusting cylinder and a support plate. A guide groove is arranged on the inner side of the support frame, and guide sliders which slide in cooperation with the guide groove are arranged around the support plate. The bottom end of the sewage sedimentation and separation cylinder is welded to the support plate.

[0008] Furthermore, the stirring drive device includes a first transmission wheel, a first conveyor belt, a second transmission wheel, a meshing assembly, a third transmission wheel, a second conveyor belt, a fourth transmission wheel and a stirring drive motor, the first transmission wheel is installed on the output shaft of the stirring drive motor, the first conveyor belt is sleeved on the outside of the first transmission wheel and the second transmission wheel, the second conveyor belt is sleeved on the outside of the third transmission wheel and the fourth transmission wheel, the second transmission wheel drives the third transmission wheel to rotate through the meshing assembly, and the fourth transmission wheel is installed on the top of the stirring shaft.

[0009] Furthermore, the meshing assembly includes a gear 1 and a gear 2, and the gear 1 and the gear 2 mesh with each other.

[0010] Further, the rotation driving device includes a fifth transmission wheel, a sixth transmission wheel, a third transmission belt, a seventh transmission wheel, an eighth transmission wheel and a fourth transmission belt, the third transmission belt is sleeved on the fifth transmission wheel and the sixth transmission wheel, the fourth transmission belt is sleeved on the seventh transmission wheel and the eighth transmission wheel, the sixth transmission wheel and the seventh transmission wheel are coaxially arranged, and the eighth transmission wheel is fixed to the top end of the central shaft.

[0011] The advantages of the invention compared with the prior art are:

[0012] The present invention arranges an aeration device inside a sewage sedimentation separation cylinder, wherein the aeration device comprises an aeration plate, a central shaft and a rotation driving device; a coagulant or a flocculant is added inside the sewage sedimentation separation cylinder, and air is introduced into the sewage inside the sewage sedimentation separation cylinder through the central shaft of the hollow structure and the aeration plate; the contact probability between the coagulant or the flocculant and the sewage is increased by continuously aerating the sewage, thereby improving the sedimentation efficiency of the sewage inside the sewage sedimentation separation cylinder, improving the efficiency of sewage treatment, and solving the problem of insufficient reaction between the coagulant or the flocculant and the sewage in the prior art.

[0013] The present invention adds a combination of multiple structures such as a stirring shaft, a stirring blade and a barrel wall scraper inside the sewage sedimentation separation barrel. The edge of the stirring blade extends upward to form a mounting plate. During the stirring process, the top and bottom of the sewage sedimentation separation barrel can be stirred simultaneously. After a coagulant or flocculant is added to the inside of the sewage sedimentation separation barrel, the contact probability of the coagulant or flocculant and the sewage can be increased by continuous stirring, thereby further shortening the reaction time between the coagulant or flocculant and the sewage, which is beneficial to the formation of colloidal waste in the sewage and accelerates the sedimentation speed of the sewage.

[0014] The central axis and the aeration plate of the present invention are driven to rotate by a rotating drive device, and the aeration plate continuously rotates to send air into the sewage. Under the action of centrifugal force, the air in the aeration holes at the bottom of the aeration plate forms annular bubbles inside the sewage sedimentation and separation cylinder. At the same time, combined with the structure of the above-mentioned stirring shaft and stirring blades, the reaction between the coagulant or flocculant and the sewage can be greatly improved, so that the coagulant or flocculant can fully react during the aeration and stirring process, thereby improving the efficiency of sedimentation and separation in the sewage.

[0015] The present invention is provided with a lifting and adjusting device at the bottom end of the sewage sedimentation separation cylinder, the lifting and adjusting device comprises a lifting and adjusting oil cylinder and a supporting plate. After the sewage is precipitated and separated, the lifting and adjusting oil cylinder drives the supporting plate to realize height adjustment, and the lifting and lowering of the supporting plate drives the sewage sedimentation separation cylinder to realize height adjustment. By lowering the height of the sewage sedimentation separation cylinder, the sewage sedimentation separation cylinder is separated from the sewage stirring device and the aeration device, so that the solid and liquid inside the sewage sedimentation separation cylinder are separated conveniently, thereby solving the problem that the sewage solid and liquid are difficult to separate in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of a sedimentation separation device for sewage treatment according to the present invention;

[0017] Figure 2 It is a partial cross-sectional view of a sedimentation separation device for sewage treatment according to the present invention;

[0018] Figure 3 It is a partial schematic diagram of a sedimentation separation device for sewage treatment according to the present invention;

[0019] Figure 4 It is another partial schematic diagram of a sedimentation separation device for sewage treatment according to the present invention;

[0020] Figure 5 It is a schematic diagram of the structure of the sewage stirring device and the aeration device inside the sewage sedimentation separation cylinder;

[0021] Figure 6 is a cross-sectional schematic diagram of an aeration device;

[0022] Figure 7 for Figure 1 A partial enlarged view of the middle A;

[0023] Figure 8 for Figure 1 A partial enlarged view of point B in the middle;

[0024] Fig. 9 It is a schematic diagram of the cross-section matching of the guide groove and the guide slider;

[0025] Fig.10 for Figure 5 A partial enlarged view of point C in the middle;

[0026] Fig.11 Schematic diagram of the connection between the central shaft and the aeration plate.

[0027] Among them, 1. sewage sedimentation separation cylinder, 2. stirring drive device, 2-1. first transmission wheel, 2-2. first conveyor belt, 2-3. second transmission wheel, 2-4. third transmission wheel, 2-5. second conveyor belt, 2-6. second conveyor belt, 2-7. stirring drive motor, 2-8. gear 1, 2-9. gear 2, 3. stirring shaft, 4. stirring blade, 5. mounting plate, 6. cylinder wall scraper, 7. aeration plate, 8. central shaft, 9. rotation drive device, 9-1. fifth transmission wheel, 9-2 , the sixth transmission wheel, 9-3, the third transmission belt, 9-4, the seventh transmission wheel, 9-5, the eighth transmission wheel, 9-6, the fourth transmission belt, 9-7, the motor, 10, the air supply pipe, 11, the air supply component, 12, the aeration hole, 13, the lifting and adjusting cylinder, 14, the support plate, 15, the guide groove, 16, the guide slider, 17, the reinforcement ring, 18, the fixed shaft, 19, the water outlet pipe, 20, the control valve, 21, the protective shell, 22, the support fixing rod, 23, the support bottom plate, 24, the filter screen. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0029] The present invention is described in detail with reference to the accompanying drawings.

[0030] The present invention provides a sedimentation separation device for sewage treatment in a specific implementation, including a support frame, on which a sewage sedimentation separation cylinder 1 and a sewage stirring device are installed, the sewage stirring device includes a stirring drive device 2, a stirring shaft 3 and a stirring blade 4, the output end of the stirring drive device 2 is connected to the top of the stirring shaft 3, the stirring blade 4 is fixed to the outer peripheral surface of the stirring shaft 3, the outer edge of the stirring blade 4 extends upward to form a mounting plate 5, a cylinder wall scraper 6 is detachably mounted on the mounting plate 5, and the outer edge of the cylinder wall scraper 6 is in contact with the inner wall of the sewage sedimentation separation cylinder 1;

[0031] An aeration device is arranged inside the sewage sedimentation separation cylinder 1, and the aeration device includes an aeration plate 7, a central shaft 8 and a rotation drive device 9. The rotation drive device 9 is used to be connected to the top end of the central shaft 8. The aeration plate 7 is installed on the central shaft 8. The central shaft 8 is arranged in a hollow tubular structure, and its bottom end is connected to the plane on the aeration plate 7. An air supply pipe 10 is arranged inside the central shaft 8. An air supply component 11 is installed at the top end of the air supply pipe 10, and its bottom end is arranged inside the aeration plate 7. Aeration holes 12 are arranged at the bottom end of the aeration plate 7; wherein, the aeration plate 7 is arranged in a disc-shaped structure, and the aeration holes 12 are distributed in a circular array at the bottom of the aeration plate 7.

[0032] A lifting and adjusting device is provided at the bottom end of the sewage sedimentation and separation cylinder 1, and the lifting and adjusting device includes a lifting and adjusting cylinder 13 and a support plate 14. A guide groove 15 is provided on the inner side of the support frame 1. Guide sliders 16 that slide in cooperation with the guide groove 15 are provided around the support plate 14. The bottom end of the sewage sedimentation and separation cylinder 1 is welded to the support plate 14.

[0033] Example:

[0034] The specific sedimentation and separation process of the present invention for sewage treatment is as follows: the staff can add sewage to the interior of the sewage sedimentation and separation cylinder 1 through a water pump or directly, and add the coagulant or flocculant used for sewage sedimentation and separation to the interior of the corresponding sewage sedimentation and separation cylinder 1. In order to make the coagulant or flocculant react more fully with the sewage, the sewage stirring device and the aeration device are started. When the sewage stirring device starts to work, the stirring drive device 2 drives the stirring shaft 3 to start rotating, and the rotation of the stirring shaft 3 drives the corresponding stirring blade 4 to start rotating. Since the outer edge of the stirring blade 4 extends upward to form a mounting plate 5, the mounting plate 5 also rotates during the rotation of the stirring blade 4. The sewage is stirred by the stirring blade 4 and the mounting plate 5 at the same time. The above structure can simultaneously realize the stirring of the top and bottom of the sewage sedimentation and separation cylinder 1, so that the coagulant or flocculant inside the sewage sedimentation and separation cylinder 1 can fully react with the sewage. The sewage treatment using the flocculant is to introduce appropriate chemical substances, such as polymers or inorganic salts, and utilize chemical bonding or adsorption to aggregate the tiny particles suspended in the water into larger floccules, which is convenient for subsequent sedimentation and separation. The use of coagulants to treat sewage is to add one or more chemical substances to change the surface charge of suspended particles in the water, so that they attract each other to form aggregates, thereby accelerating the mutual combination and precipitation of particles to solve the problem of excessive suspended particles and turbidity in the water body and improve the quality and transparency of the water. Coagulants include aluminum salts or iron salts, etc., and workers can choose to use them according to their needs during the sewage treatment process.

[0035] During the operation of the sewage stirring device, the aeration device also starts to work, wherein the rotation drive device 9 drives the central shaft 8 to start rotating. Since the central shaft 8 is hollow, air is sent into the air supply pipe 10 inside the central shaft 8 through the air supply component 11, and the air supply pipe 10 sends gas into the aeration plate 7, wherein the central shaft 8 continuously rotates to drive the aeration plate 7 to rotate, and the air in the air supply pipe 10 comes out from the aeration hole 12 at the bottom end of the aeration plate 7. Since the aeration plate 7 continuously rotates, the air enters the sewage and is subjected to the centrifugal force to form annular bubbles in the sewage. The continuous entry of the above-mentioned air into the sewage can further increase the contact probability between the coagulant or flocculant and the sewage, thereby enabling the reaction between the coagulant or flocculant and the sewage to be more sufficient, which is beneficial to the formation of colloidal waste in the sewage and accelerates the sedimentation speed of the sewage. The above-mentioned embodiment can treat the sewage, accelerate the sedimentation and separation process in the sewage, and can quickly condense and remove the suspended particles and colloids in the sewage, which can greatly improve the efficiency of the sewage treatment.

[0036] After the sewage treatment is completed, the lifting and adjusting cylinder 13 is started, the lifting and adjusting cylinder 13 is lowered to drive the support plate 14 to descend, and the support plate 14 drives the sewage sedimentation separation cylinder 1 to descend, and the sewage sedimentation separation cylinder 1 is left to stand for 5-10 minutes, and the suspended particles and colloids in the sewage sedimentation separation cylinder 1 are precipitated to the bottom of the cylinder, and the sediment accumulates at the bottom of the sewage sedimentation separation cylinder 1, and the sewage above the sediment is discharged from the outlet pipe 19. The sedimentation separation cylinder 1 descends, and the water is discharged after the sediment is formed. After the treated sewage water is discharged, the staff can use a shovel to remove the internal sediment.

[0037] Among them, a cylinder wall scraper 6 is detachably installed on the mounting plate 5, and the outer edge of the cylinder wall scraper 6 fits the inner wall of the sewage sedimentation and separation cylinder 1; since the sewage contains sludge and the like, the sludge will adhere to the sewage sedimentation and separation cylinder 1 during the sedimentation and separation process. When the sewage stirring device is in operation, the stirring shaft 3 drives the stirring blade 4, the mounting plate 5 and the cylinder wall scraper 6 to rotate, and the cylinder wall scraper 6 can scrape the inner wall of the sewage sedimentation and separation cylinder 1 in real time to prevent sludge from remaining on the inner wall of the sewage sedimentation and separation cylinder 1. The above structure facilitates the cleaning of the sewage sedimentation and separation cylinder 1.

[0038] In order to facilitate the stirring of sewage inside the sewage sedimentation separation cylinder, the stirring drive device 2 includes a first transmission wheel 2-1, a first conveyor belt 2-2, a second transmission wheel 2-3, a meshing assembly, a third transmission wheel 2-4, a second conveyor belt 2-5, a fourth transmission wheel 2-6 and a stirring drive motor 2-7. The first transmission wheel 2-1 is installed on the output shaft of the stirring drive motor 2-7, the first conveyor belt 2-2 is sleeved on the outside of the first transmission wheel 2-1 and the second transmission wheel 2-3, the second conveyor belt 2-5 is sleeved on the outside of the third transmission wheel 2-4 and the fourth transmission wheel 2-6, the second transmission wheel 2-3 drives the third transmission wheel 2-4 to rotate through the meshing assembly, and the fourth transmission wheel 2-6 is installed at the top of the stirring shaft 3. Among them, the stirring drive motor 2-7 works to drive the first transmission wheel 2-1 to start rotating, and the first transmission wheel 2-1 drives the second transmission wheel 2-3 to start rotating through the first conveyor belt 2-2, because: the meshing assembly includes gear 1 2-8 and gear 2 2-9, the gear 1 2-8 and gear 2 2-9 are meshed with each other, the gear 1 2-8 is coaxially arranged with the second transmission wheel 2-3, and the gear 2 2-9 is coaxially arranged with the third transmission wheel 2-4. The second transmission wheel 2-3 rotates to drive gear 1 2-8 to start rotating, gear 1 2-8 drives gear 2 2-9 to start rotating, gear 2 2-9 rotates to drive the third transmission wheel 2-4 to start rotating, and the third transmission wheel 2-4 drives the fourth transmission wheel 2-6 to start rotating through the second conveyor belt 2-5.

[0039] In order to facilitate the driving of the aeration device, the rotating drive device 9 includes a fifth transmission wheel 9-1, a sixth transmission wheel 9-2, a third transmission belt 9-3, a seventh transmission wheel 9-4, an eighth transmission wheel 9-5, a fourth transmission belt 9-6 and a motor 9-7. The third transmission belt 9-3 is sleeved on the fifth transmission wheel 9-1 and the sixth transmission wheel 9-2, the fourth transmission belt 9-6 is sleeved on the seventh transmission wheel 9-4 and the eighth transmission wheel 9-5, the sixth transmission wheel 9-2 and the seventh transmission wheel 9-4 are coaxially arranged, the eighth transmission wheel 9-5 is fixed to the top of the central shaft 8, and the output shaft of the motor 9-7 is used to connect the fifth transmission wheel 9-1. The motor 9-7 drives the fifth transmission wheel 9-1 to rotate, the fifth transmission wheel 9-1 drives the sixth transmission wheel 9-2 to rotate through the third transmission belt 9-3, the sixth transmission wheel 9-2 drives the seventh transmission wheel 9-4 to rotate, the seventh transmission wheel 9-4 drives the eighth transmission wheel 9-5 to rotate through the fourth transmission belt 9-6, the eighth transmission wheel 9-5 drives the central shaft 8 to start rotating, the aeration pump sends microbubbles into the aeration plate 7, drives the aeration plate 7 to rotate continuously through the central shaft 8, and the microbubbles come out from the aeration holes 12 at the bottom of the aeration plate 7 to form ring-shaped bubbles in the sewage.

[0040] In order to facilitate aeration of the sewage, the air delivery component 11 is an aeration pump with an impeller, the bottom air outlet of the air delivery component 11 is used to connect with the air delivery pipe 10, and the top air inlet of the air delivery component 11 is used to connect with the outside air. The aeration unit delivers microbubbles into the sewage through the impeller, and the above structure can increase the reaction probability of the coagulant or flocculant with the sewage.

[0041] In order to increase the stability of the stirring blades, the mounting plate and the barrel scraper during the rotation process, a reinforcement ring 17 is fixed to the top of the mounting plate 5 on the stirring blade 4. The stirring blades 4 and the barrel scrapers 6 are provided in three groups, each group of stirring blades 4 is provided with a corresponding group of barrel scrapers 6, and each group of barrel scrapers 6 has a different height. The three groups of barrel scrapers 6 are arranged in sequence from top to bottom. Through the staggered arrangement of the barrel scrapers, the uniformity of sewage stirring can be improved, and the inside of the sewage sedimentation separation cylinder can be completely scraped.

[0042] In order to facilitate the installation of the barrel wall scraper, a fixed shaft 18 is provided on the mounting plate 5 on the stirring blade 4, and the barrel wall scraper 6 is fixedly mounted on the fixed shaft 18 by screws. The cross section of the barrel wall scraper 6 is a right-angled triangle structure, and the inclined surface of the barrel wall scraper 6 is arranged close to the inner wall of the sewage sedimentation separation barrel 1. When the stirring shaft stirs the sewage, the stirring shaft drives the mounting plate and the barrel wall scraper to rotate, and the barrel wall scraper is used to scrape off the sludge attached to the inner wall of the sewage sedimentation separation barrel, so as to facilitate the cleaning of the sewage sedimentation separation barrel.

[0043] In order to facilitate the discharge of precipitated water, an outlet pipe 19 is provided at the lower middle part of the side of the sewage sedimentation separation cylinder 1, and a control valve 20 is installed on the outlet pipe 19. A filter screen 24 is installed in the outlet pipe 19. By opening the control valve 20, the sewage after sedimentation and separation can be discharged from the outlet pipe 19, and the sediment is filtered through the filter screen 24 to prevent the sediment from flowing out of the outlet pipe.

[0044] In order to increase the stability of the sewage sedimentation separation cylinder during the lifting process, the guide slider 16 is arranged in a T-shaped structure, and the guide slider 16 is welded to the support plate 14. When the lifting adjustment cylinder 13 drives the support plate 14 to lift, the guide slider 16 on the lifting plate 14 slides along the guide groove 15 on the support frame, and the guide groove can guide the lifting of the support plate and the sewage sedimentation separation cylinder, thereby increasing the stability thereof during the lifting process.

[0045] In order to facilitate the support and protection of the above-mentioned sewage treatment device, the support frame includes a protective shell 21, a support fixing rod 22 and a support bottom plate 23, the bottom end of the support fixing rod 22 is fixed on the support bottom plate 23, and the top end thereof is fixed to the bottom end of the protective shell 21. The above-mentioned protective shell 21 is installed on the outside of the stirring drive device and the rotating drive device, and the support fixing rod 22 is used to support the protective shell 21.

[0046] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A sedimentation separation device for sewage treatment, comprising a support frame, on which a sewage sedimentation separation cylinder (1) and a sewage stirring device are mounted, wherein the sewage stirring device comprises a stirring drive device (2), a stirring shaft (3) and a stirring blade (4), wherein the output end of the stirring drive device (2) is connected to the top end of the stirring shaft (3), and the stirring blade (4) is fixed to the outer peripheral surface of the stirring shaft (3), characterized in that: The outer edge of the stirring blade (4) extends upward to form a mounting plate (5), on which a cylinder wall scraper (6) is detachably mounted, and the outer edge of the cylinder wall scraper (6) is in contact with the inner wall of the sewage sedimentation separation cylinder (1); An aeration device is arranged inside the sewage sedimentation and separation cylinder (1), the aeration device comprising an aeration plate (7), a central shaft (8) and a rotation drive device (9), the rotation drive device (9) being used to be connected to the top end of the central shaft (8), the aeration plate (7) being mounted on the central shaft (8), the central shaft (8) being a hollow tubular structure, the bottom end of which is in plane communication with the aeration plate (7), an air supply pipe (10) being arranged inside the central shaft (8), an air supply component (11) being installed at the top end of the air supply pipe (10), the bottom end of which is arranged inside the aeration plate (7), and an aeration hole (12) being arranged at the bottom end of the aeration plate (7); The bottom end of the sewage sedimentation separation cylinder (1) is provided with a lifting and adjusting device, the lifting and adjusting device comprising a lifting and adjusting oil cylinder (13) and a support plate (14), the inner side of the support frame is provided with a guide groove (15), the support plate (14) is provided with a guide slide block (16) which slides in cooperation with the guide groove (15), and the bottom end of the sewage sedimentation separation cylinder (1) is welded to the support plate (14).

2. A sedimentation separation device for sewage treatment according to claim 1, characterized in that: The stirring drive device (2) comprises a first transmission wheel (2-1), a first conveyor belt (2-2), a second transmission wheel (2-3), a meshing assembly, a third transmission wheel (2-4), a second conveyor belt (2-5), a fourth transmission wheel (2-6) and a stirring drive motor (2-7); the first transmission wheel (2-1) is mounted on the output shaft of the stirring drive motor (2-7); the first conveyor belt (2-2) is sleeved on the outside of the first transmission wheel (2-1) and the second transmission wheel (2-3); the second conveyor belt (2-5) is sleeved on the outside of the third transmission wheel (2-4) and the fourth transmission wheel (2-6); the second transmission wheel (2-3) drives the third transmission wheel (2-4) to rotate through the meshing assembly; and the fourth transmission wheel (2-6) is mounted on the top of the stirring shaft (3).

3. A sedimentation separation device for sewage treatment according to claim 2, characterized in that: The meshing assembly comprises a gear 1 (2-8) and a gear 2 (2-9), wherein the gear 1 (2-8) and the gear 2 (2-9) mesh with each other, the gear 1 (2-8) is coaxially arranged with the second transmission wheel (2-3), and the gear 2 (2-9) is coaxially arranged with the third transmission wheel (2-4).

4. A sedimentation separation device for sewage treatment according to claim 1, characterized in that: The rotary drive device (9) comprises a fifth transmission wheel (9-1), a sixth transmission wheel (9-2), a third transmission belt (9-3), a seventh transmission wheel (9-4), an eighth transmission wheel (9-5), a fourth transmission belt (9-6) and a motor (9-7); the third transmission belt (9-3) is sleeved on the fifth transmission wheel (9-1) and the sixth transmission wheel (9-2); the fourth transmission belt (9-6) is sleeved on the seventh transmission wheel (9-4) and the eighth transmission wheel (9-5); the sixth transmission wheel (9-2) and the seventh transmission wheel (9-4) are coaxially arranged; the eighth transmission wheel (9-5) is fixed to the top end of the central shaft (8); and the output shaft of the motor (9-7) is used to connect the fifth transmission wheel (9-1).

5. The sedimentation separation device for sewage treatment according to claim 1, characterized in that: The air supply component (11) is an aeration pump with an impeller, the bottom air outlet of the air supply component (11) is used to connect with the air supply pipeline (10), and the top air inlet of the air supply component (11) is used to communicate with the outside air.

6. A sedimentation separation device for sewage treatment according to claim 1, characterized in that: A reinforcement ring (17) is fixed to the top end of the mounting plate (5) on the stirring blade (4).

7. A sedimentation separation device for sewage treatment according to claim 6, characterized in that: A fixed shaft (18) is arranged on the mounting plate (5) on the stirring blade (4), and the cylinder wall scraper (6) is fixedly mounted on the fixed shaft (18) by means of screws. The cross section of the cylinder wall scraper (6) is arranged in a right-angled triangle structure, and the inclined surface of the cylinder wall scraper (6) is arranged close to the inner wall of the sewage sedimentation separation cylinder (1).

8. A sedimentation separation device for sewage treatment according to claim 7, characterized in that: A water outlet pipe (19) is arranged at the lower middle part of the side of the sewage sedimentation separation cylinder (1), a control valve (20) is installed on the water outlet pipe (19), and a filter screen (24) is installed in the water outlet pipe (19). By opening the control valve (20), the sewage after sedimentation separation can be discharged from the water outlet pipe (19) and filtered through the filter screen (24).

9. The sedimentation separation device for sewage treatment according to claim 1, characterized in that: The guide slider (16) is arranged in a T-shaped structure, and the guide slider (16) is welded to the support plate (14).

10. The sedimentation separation device for sewage treatment according to claim 1, characterized in that: The support frame comprises a protective shell (21), a support fixing rod (22) and a support base plate (23); the bottom end of the support fixing rod (22) is fixed on the support base plate (23), and the top end of the support fixing rod (22) is fixed on the bottom end of the protective shell (21).

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