Multi-stage purification industrial sewage treatment system

Abstract

The invention discloses a multi-stage purification industrial sewage treatment system which comprises a flocculation basin, a flocculation mechanism and an ozone purification mechanism, a sedimentation tank is arranged on the right side of the flocculation tank, the sedimentation tank is communicated with the upper end of the flocculation tank, a rapid sedimentation block is fixedly connected to the upper end of the right side of the sedimentation tank, and inclined through holes which are uniformly distributed are formed in the rapid sedimentation block; the flocculation mechanism comprises a supporting plate, throwing assemblies, second motors and stirring shafts, the rotatable supporting plate is arranged at the upper end of the flocculation basin, the second motors which are evenly distributed are fixedly connected to the upper surface of the supporting plate, the stirring shafts are fixedly connected to the lower ends of output shafts of the second motors, and the throwing assemblies are arranged at the left end and the right end of the supporting plate. According to the multi-stage purification industrial sewage treatment system, a flocculating agent and sewage are mixed more sufficiently through rotation of the stirring shaft and the flocculating agent throwing mechanism, the ozone treatment stage is more efficient and sufficient, and meanwhile waste of ozone is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, in particular to a multi-stage purification industrial sewage treatment system. Background Art

[0002] Sewage treatment is the process of purifying sewage to meet the water quality requirements for discharge into a water body or reuse. Sewage treatment is widely used in various fields such as construction, agriculture, transportation, energy, petrochemicals, environmental protection, urban landscape, medical treatment, catering, etc., and is increasingly entering the daily lives of ordinary people.

[0003] Sewage treatment requires physical solid-liquid separation first, and then the treatment of organic matter and sulfide substances dissolved in the sewage. In the physical treatment stage, flocculants need to be placed in the flocculation tank, and the sewage needs to be stirred with the motor to achieve the mixing of the flocculant and sewage. However, the flocculant placement position is fixed, the flocculant placement is not uniform, and the motor position is fixed, the stirring force is limited. Ozone is usually used to treat organic matter and sulfide substances in the subsequent treatment of sewage. The sewage merges with ozone at the front end of the ozone tank, and the baffle in the middle of the ozone tank slows down the flow rate of sewage to allow for full reaction. However, the ozone outlet is only set at the front end of the ozone tank. The contact time between ozone and sewage is limited, and less ozone is dissolved, which causes ozone waste and the sewage requires a long treatment time. For this reason, we propose a multi-stage purification industrial sewage treatment system. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the existing defects and provide a multi-stage purification industrial sewage treatment system. The flocculant and sewage are mixed more fully through the rotation of the stirring shaft and the flocculant spreading mechanism, and the ozone treatment stage is more efficient and sufficient while reducing the waste of ozone, which can effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: a multi-stage purification industrial sewage treatment system, comprising a flocculation tank, a flocculation mechanism and an ozone purification mechanism;

[0006] Flocculation tank: a sedimentation tank is arranged on the right side thereof, the sedimentation tank is connected with the upper end of the flocculation tank, a fast sedimentation block is fixedly connected to the upper end of the right side of the sedimentation tank, and evenly distributed inclined through holes are opened inside the fast sedimentation block;

[0007] Flocculation mechanism: It includes a support plate, a throwing assembly, a second motor and a stirring shaft. A rotatable support plate is provided at the upper end of the flocculation tank. The upper surface of the support plate is fixedly connected with evenly distributed second motors. The lower ends of the output shafts of the second motors are fixedly connected with stirring shafts. Spraying assemblies are provided at both left and right ends of the support plate, and the spraying assemblies are respectively located between two adjacent second motors.

[0008] Ozone purification mechanism: It is symmetrically arranged at the front and rear ends of the right side of the sedimentation tank. The flocculant and sewage are mixed more fully through the rotation of the stirring shaft and the flocculant spreading mechanism. The ozone treatment stage is more efficient and sufficient while reducing the waste of ozone.

[0009] Furthermore, it also includes a controller, which is arranged on the front side of the flocculation tank, the input end of the controller is electrically connected to the external power supply, and the input end of the second motor is electrically connected to the output end of the controller to control the electrical appliance.

[0010] Furthermore, the flocculation mechanism also includes an inner gear ring and a rotating component, and the rotating component includes a base, a motor 1, a pulley seat, a gear and a pulley. The left and right sides of the support plate are fixedly connected to the base, and the front and rear ends of the base are rotatably connected to the pulley seat through a rotating column, and the left and right ends of the pulley seat are rotatably connected to the pulley through a pin shaft, and the outer arc surface of the pulley is slidably connected to the upper edge of the flocculation tank, the middle part of the base is fixedly connected to the motor 1, and the lower end of the output shaft of the motor 1 is fixedly sleeved with a gear, the upper end of the flocculation tank is fixedly connected to the inner gear ring, and the gears are meshingly connected to the inner gear ring, and the input end of the motor 1 is electrically connected to the output end of the controller to realize the rotation of the barrel and the stirring shaft.

[0011] Furthermore, the spreading assembly includes a feeding port, a barrel, a spreading disc seat, a spreading disc and a motor four, the left and right ends of the support plate are fixedly connected with the barrel, the barrel is respectively located between two adjacent motors two, the upper end of the barrel is provided with a feeding port, the lower end of the barrel is provided with a spreading disc seat, the lower surface of the spreading disc seat is fixedly connected with the motor four, the upper end of the output shaft of the motor four is fixedly sleeved with a spreading disc, the spreading disc is respectively located inside the spreading disc seat, the input end of the motor four is electrically connected to the output end of the controller to realize the spreading of the flocculant.

[0012] Furthermore, the spreading assembly also includes motor three, a rotating shaft and spiral blades. The upper end of the barrel is fixedly connected to motor three, the lower end of the output shaft of motor three is fixedly sleeved with a rotating shaft, the upper end of the rotating shaft is provided with evenly distributed stirring rods, the lower end of the rotating shaft is provided with spiral blades, and the input end of motor three is electrically connected to the output end of the controller to prevent flocculant from agglomerating and conveying flocculant.

[0013] Furthermore, a sewage inlet is provided on the left side of the flocculation tank, and an inclined filter screen is fixedly connected to the interior of the sewage inlet to remove floating objects.

[0014] Furthermore, the ozone purification mechanism includes an ozone treatment tank, an air outlet plate, an air inlet pipe and an air outlet pipe. The right end of the sedimentation tank is provided with ozone treatment tanks symmetrically distributed front and back. The ozone treatment tanks are connected to the right end of the sedimentation tank through a water inlet pipe. The middle of the upper end of the ozone treatment tank is fixedly connected with an air inlet pipe, and the lower end of the air inlet pipe is fixedly connected with an air outlet plate. The outer arc surface of the air outlet plate is provided with evenly distributed air outlet holes. The edge of the upper end of the ozone treatment tank is fixedly connected with an air outlet pipe, and a recovery pipe is fixedly connected between the two air outlet pipes to achieve ozone treatment of sewage.

[0015] Furthermore, the ozone purification mechanism also includes an electric butterfly valve, and the middle part of the water inlet pipe is provided with an electric butterfly valve, and the input end of the electric butterfly valve is electrically connected to the output end of the controller to achieve automatic switching.

[0016] Furthermore, the ozone purification mechanism also includes a liquid level sensor, and the edges of the upper ends of the ozone treatment tanks are fixedly connected with liquid level sensors. The detection ends of the liquid level sensors are respectively located at the lower ends inside adjacent ozone treatment tanks. The liquid level sensors are bidirectionally electrically connected to the controller to detect the sewage level.

[0017] Furthermore, the ozone purification mechanism also includes a water pump, an activated carbon treatment tank and an activated carbon filter element. An activated carbon treatment tank is placed at the rear end of the ozone treatment tank. A water pump is connected in series between the upper end of the activated carbon treatment tank and the lower end of the adjacent ozone treatment tank on the left. The input end of the water pump is electrically connected to the output end of the controller to remove residual organic matter in the sewage.

[0018] Compared with the prior art, the beneficial effects of the present invention are: the multi-stage purification industrial sewage treatment system has the following advantages:

[0019] 1. The center of the support plate rotates with the central axis of the flocculation tank as the center of the circle, driving the second motor and the barrel to rotate. The stirring shafts on the left and right sides rotate and revolve at the same time, which has a stronger stirring effect on the sewage. The fourth motor drives the spreading plate to rotate while the spreading plate seat revolves, and the flocculant is evenly spread into the inside of the flocculation tank. The flocculant spreading area is larger, and the flocculant is in more complete contact with the sewage, achieving a better flocculation effect during sewage treatment.

[0020] 2. The two ozone treatment tanks are used alternately to avoid the sewage staying in the sedimentation tank for too long, thereby improving the overall treatment efficiency. The ozone is fully contacted and mixed with the water to be treated inside the ozone treatment tank. More ozone is dissolved in a unit volume of sewage, and the time required for sewage treatment is shortened, making ozone treatment of sewage more efficient.

[0021] 3. Undissolved ozone is discharged from the air outlet pipe and recycled, reducing the waste of ozone. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the present invention;

[0023] Figure 2 It is a cross-sectional structural schematic diagram of the ozone purification mechanism of the present invention;

[0024] Figure 3 This is a cross-sectional structural diagram of the structure of the throwing assembly of the present invention.

[0025] Figure 4 It is a schematic diagram of the cross-sectional structure of the structure A of the present invention;

[0026] Figure 5 It is a schematic diagram of the partial cross-section structure of the structural sedimentation tank of the present invention.

[0027] In the figure: 1 flocculation tank, 2 flocculation mechanism, 21 internal gear ring, 22 rotating component, 221 base, 222 motor 1, 223 pulley seat, 224 gear, 225 pulley, 23 support plate, 24 spreading component, 241 motor 3, 242 feeding port, 243 rotating shaft, 244 barrel, 245 spiral blade, 246 spreading disc seat, 247 spreading disc, 248 motor 4, 25 motor 2, 26 stirring shaft, 3 sewage inlet, 4 filter, 5 sedimentation tank, 6 rapid sedimentation block, 7 ozone purification mechanism, 71 electric butterfly valve, 72 ozone treatment tank, 73 air outlet disc, 74 air inlet pipe, 75 air outlet pipe, 76 liquid level sensor, 77 water pump, 78 activated carbon treatment tank, 79 activated carbon filter element, 8 controller. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] See also Figure 1-5 , this embodiment provides a technical solution: a multi-stage purification industrial wastewater treatment system, including a flocculation tank 1, a flocculation mechanism 2 and an ozone purification mechanism 7;

[0030] Flocculation tank 1: a sedimentation tank 5 is arranged on the right side thereof, and the sedimentation tank 5 is connected with the upper end of the flocculation tank 1. A fast sedimentation block 6 is fixedly connected to the upper end of the right side of the sedimentation tank 5, and evenly distributed inclined through holes are provided inside the fast sedimentation block 6. A sewage inlet 3 is arranged on the left side of the flocculation tank 1, and an inclined filter screen 4 is fixedly connected inside the sewage inlet 3. After the sewage is combined with the flocculant, it flows into the sedimentation tank 5, and the solid part in the sewage is settled. At this time, there are still some fine flocs floating in the water. The inclined through holes of the fast sedimentation block 6 accelerate the settlement of the floating fine flocs through the principle of shallow pool sedimentation, so that the clean water located at the upper end of the fast sedimentation block 6 removes most of the flocs, and the clean water at the upper end of the fast sedimentation block 6 enters the ozone treatment tank 72;

[0031] Flocculation mechanism 2: It includes a support plate 23, a throwing assembly 24, a motor 25 and a stirring shaft 26. A rotatable support plate 23 is provided at the upper end of the flocculation tank 1. The upper surface of the support plate 23 is fixedly connected with evenly distributed motors 25. The lower ends of the output shafts of the motors 25 are fixedly connected with stirring shafts 26. Spraying assemblies 24 are provided at both ends of the support plate 23. The spraying assemblies 24 are respectively located between two adjacent motors 25. The flocculation mechanism 2 also includes an inner gear ring 21 and a rotating assembly 22. The rotating assembly 22 includes a base 221, a motor 1 222, a pulley seat 223, a gear 224 and a pulley 225. The left and right sides of the support plate 23 are fixedly connected with the base 221. The front and rear ends of the base 221 are rotated. The moving column is rotatably connected to a pulley seat 223, and the left and right ends of the pulley seat 223 are rotatably connected to pulleys 225 through pin shafts. The outer arc surfaces of the pulleys 225 are slidably connected to the upper edge of the flocculation tank 1. The middle part of the base 221 is fixedly connected to a motor 222, and the lower end of the output shaft of the motor 222 is fixedly sleeved with a gear 224. The upper end of the flocculation tank 1 is fixedly connected to an inner gear ring 21, and the gears 224 are meshed with the inner gear ring 21. The input end of the motor 222 is electrically connected to the output end of the controller 8. The spreading assembly 24 includes a feeding port 242, a barrel 244, a spreading disc seat 246, a spreading disc 247 and a motor 248. The left and right ends of the support plate 23 are fixedly connected to the barrel 244, and the barrel 244 is respectively located at Between two adjacent motors 25, a feeding port 242 is provided at the upper end of the barrel 244, a spreading disc seat 246 is provided at the lower end of the barrel 244, a motor 4 248 is fixedly connected to the lower surface of the spreading disc seat 246, and a spreading disc 247 is fixedly sleeved on the upper end of the output shaft of the motor 4 248, and the spreading disc 247 is respectively located inside the spreading disc seat 246, and the input end of the motor 4 248 is electrically connected to the output end of the controller 8. The spreading assembly 24 also includes a motor 3 241, a rotating shaft 243 and a spiral blade 245. The upper end of the barrel 244 is fixedly connected to the motor 3 241, and the lower end of the output shaft of the motor 3 241 is fixedly sleeved with a rotating shaft 243, and the upper end of the rotating shaft 243 is provided with evenly distributed stirring rods. The lower ends of the motors 3 are provided with spiral blades 245, and the input ends of the motors 3 241 are electrically connected to the output ends of the controller 8. During treatment, sewage is put into the sewage inlet 3, and the filter screen 4 blocks the floating objects in the sewage. The filter screen 4 is tilted to facilitate the centralized removal of the floating objects. The output shafts of the motors 1 222 respectively drive the gears 224 to rotate, and the gears 224 rotate inside the inner gear ring 21, driving the support plate 23 to rotate with the central axis of the flocculation tank 1 as the center of the circle. After the support plate 23 rotates one circle, it rotates in the opposite direction, and the pulley 225 is driven at the same time. The pulley seat 223 rotates continuously while the pulley 225 rotates, which is convenient for the pulley 225 to adjust the direction, so that the rotation of the support plate 23 is more stable. The three motors 25 respectively drive the stirring shafts 26 adjacent to the lower ends to rotate.At the same time, the stirring shafts 26 on the left and right sides rotate with the central axis of the flocculation tank 1 as the center of the circle, and the stirring force on the sewage is stronger. The output shaft of the motor three 241 drives the rotating shaft 243 to rotate, and the stirring rod stirs the flocculant to prevent the flocculant from agglomerating and clogging the barrel 244. The spiral blade 245 transports the flocculant to the lower end of the barrel 244. The motor four 248 drives the throwing plate 247 to rotate, and the flocculant is thrown into the flocculation tank 1 by the throwing plate 247. The barrel 244 rotates synchronously with the support plate 23, so that the flocculant is evenly thrown into the inside of the flocculation tank 1, so that the sewage and the flocculant are mixed more fully;

[0032] Ozone purification mechanism 7: It is symmetrically arranged at the front and rear ends of the right side of the sedimentation tank 5, and the ozone purification mechanism 7 includes an ozone treatment tank 72, an air outlet plate 73, an air inlet pipe 74 and an air outlet pipe 75. The right end of the sedimentation tank 5 is provided with an ozone treatment tank 72 symmetrically distributed front and back, and the ozone treatment tanks 72 are connected to the right end of the sedimentation tank 5 through the water inlet pipe. The middle part of the upper end of the ozone treatment tank 72 is fixedly connected with an air inlet pipe 74, and the lower end of the air inlet pipe 74 is fixedly connected with an air outlet plate 73. The outer arc surface of the air outlet plate 73 is provided with evenly distributed air outlet holes. The edge of the upper end of the ozone treatment tank 72 is fixedly connected with an air outlet pipe 75, and the two air outlet pipes 75 are fixedly connected. The ozone purification mechanism 7 further comprises an electric butterfly valve 71, an electric butterfly valve 71 is arranged in the middle of the water inlet pipe, and the input end of the electric butterfly valve 71 is electrically connected to the output end of the controller 8. The ozone purification mechanism 7 further comprises a liquid level sensor 76, and the edge of the upper end of the ozone treatment tank 72 is fixedly connected with the liquid level sensor 76, and the detection end of the liquid level sensor 76 is respectively located at the lower end of the inner part of the adjacent ozone treatment tank 72, and the liquid level sensor 76 is bidirectionally electrically connected to the controller 8. The ozone purification mechanism 7 further comprises a water pump 77, an activated carbon treatment tank 78 and an activated carbon filter element 79, and an activated carbon treatment tank 78 is placed at the rear end of the ozone treatment tank 72. A water pump 77 is connected in series between the upper end and the lower end of the adjacent ozone treatment tank 72 on the left. The input end of the water pump 77 is electrically connected to the output end of the controller 8. The electric butterfly valve 71 at the front end is opened, and the electric butterfly valve 71 at the rear end is closed. All the clean water enters the interior of the ozone treatment tank 72 at the front end. The air outlet of the ozone generator is connected to the two air inlet pipes 74. The ozone enters the air outlet plate 73 from the air inlet pipe 74 and is discharged through various air outlets. The ozone contacts and reacts with the clean water inside the ozone treatment tank 72 to decolorize, deodorize and remove phenol, cyanide and other pollutants in the water. The excess ozone enters the recovery pipe from the air outlet pipe 75 for recovery. The liquid level sensor 76 detects the ozone treatment tank 72. The liquid level of the internal purified water is measured and fed back to the controller 8. When the set height is reached, the electric butterfly valve 71 at the front end is closed and the electric butterfly valve 71 at the rear end is opened. Similarly, ozone sewage treatment is carried out. By switching between the two ozone treatment tanks 72, efficient utilization of ozone is achieved. After ozone is introduced into the front ozone treatment tank 72 for a certain period of time, the water pump 77 is started to send the ozone-treated water into the activated carbon treatment tank 78 at the rear end. The ozone-treated water passes through each activated carbon filter element 79 to remove organic matter and is filtered again. When the liquid level sensor 76 detects that the purified water level inside the ozone treatment tank 72 is lower than the set height, the controller 8 controls the corresponding electric butterfly valve 71 to open and send purified water again.

[0033] Wherein: it also includes a controller 8, which is arranged at the front side of the flocculation tank 1, the input end of the controller 8 is electrically connected to the external power supply, and the input end of the motor 25 is electrically connected to the output end of the controller 8.

[0034] The working principle of a multi-stage purification industrial sewage treatment system provided by the present invention is as follows: flocculants are loaded into two barrels 244 from a feeding port 242. During treatment, sewage is fed from a sewage feeding port 3, and a filter screen 4 blocks floating objects in the sewage. The filter screen 4 is tilted to facilitate the centralized removal of floating objects. The output shafts of the motor 1 222 respectively drive the gears 224 to rotate, and the gears 224 all rotate inside the inner gear ring 21, driving the support plate 23 to rotate with the central axis of the flocculation tank 1 as the center of the circle. After the support plate 23 rotates one circle, it rotates in the opposite direction, and the pulley 225 is driven at the same time. The pulley seat 223 rotates continuously while the pulley 225 rotates, which is convenient for the pulley 225 to adjust the direction and make the rotation of the support plate 23 more stable. The three motors 25 respectively drive the gears 224 to rotate. The stirring shaft 26 adjacent to the lower end rotates, and at the same time, the stirring shafts 26 on the left and right sides rotate with the central axis of the flocculation tank 1 as the center of the circle, so that the stirring force on the sewage is stronger. The output shaft of the motor three 241 drives the rotating shaft 243 to rotate, and the stirring rod stirs the flocculant to prevent the flocculant from agglomerating and clogging the barrel 244. The spiral blade 245 transports the flocculant to the lower end of the barrel 244. The motor four 248 drives the spreading plate 247 to rotate, and the flocculant is scattered into the flocculation tank 1 by the spreading plate 247. The barrel 244 rotates synchronously with the support plate 23, so that the flocculant is evenly scattered into the inside of the flocculation tank 1, so as to achieve a more complete mixing of the sewage and the flocculant. After the sewage and the flocculant are combined, they flow into the sedimentation tank 5, and the solid part in the sewage settles. At this time, some fine floccules are still floating In the water, the inclined through holes of the rapid sedimentation block 6 accelerate the sedimentation of the floating fine flocculants through the principle of shallow pool sedimentation (the existence of the inclined through holes), so that the clean water located at the upper end of the rapid sedimentation block 6 removes most of the flocculants, and the clean water at the upper end of the rapid sedimentation block 6 enters the ozone treatment tank 72, the electric butterfly valve 71 at the front end is opened, and the electric butterfly valve 71 at the rear end is closed, and all the clean water enters the interior of the ozone treatment tank 72 at the front end, and the air outlet of the ozone generator is connected with the two air inlet pipes 74. The ozone enters the air outlet disk 73 from the air inlet pipe 74 and is discharged through various air outlets. The ozone contacts and reacts with the clean water inside the ozone treatment tank 72 to decolorize, deodorize and remove phenol, cyanide and other pollutants in the water. The excess ozone enters the recovery pipe from the air outlet pipe 75. Recycling is carried out, and the liquid level sensor 76 detects the liquid level height of the clean water inside the ozone treatment tank 72 and feeds back to the controller 8. When the set height is reached, the electric butterfly valve 71 at the front end is closed and the electric butterfly valve 71 at the rear end is opened. Similarly, ozone sewage treatment is carried out. By switching the two ozone treatment tanks 72, efficient utilization of ozone is achieved. After ozone is introduced into the front ozone treatment tank 72 for a certain period of time, the water pump 77 is started to send the ozone-treated water into the activated carbon treatment tank 78 at the rear end. The ozone-treated water passes through each activated carbon filter element 79 to remove organic matter and is filtered again. When the liquid level sensor 76 detects that the clean water level inside the ozone treatment tank 72 is low to the set height, the controller 8 controls the corresponding electric butterfly valve 71 to open and send clean water again.

[0035] It is worth noting that the controller 8 disclosed in the above embodiments can use a 2080-LC70-24QWB PLC controller, the motor 222 can use a GS reduction motor, the motor 25 can use a JSL-11-8 motor, the motor 3 241 can use a 5IK60GN-CF / 5GN100K reduction motor, the motor 4 248 can use a 73ZYT010 waterproof motor, the electric butterfly valve 71 can use a D943H-16C electric butterfly valve, and the liquid level sensor 76 can use a CYW-YZ-RS485 IT liquid level sensor. The controller 8 controls the motor 1 222, the motor 25, the motor 3 241, the motor 4 248, the electric butterfly valve 71 and the liquid level sensor 76 using methods commonly used in the prior art.

[0036] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A multi-stage purification industrial wastewater treatment system, characterized in that: It comprises a flocculation tank (1), a flocculation mechanism (2) and an ozone purification mechanism (7); A flocculation tank (1): a sedimentation tank (5) is arranged on the right side thereof, the sedimentation tank (5) is connected to the upper end of the flocculation tank (1), a fast sedimentation block (6) is fixedly connected to the upper end of the right side of the sedimentation tank (5), and the interior of the fast sedimentation block (6) is provided with evenly distributed inclined through holes; The flocculation mechanism (2) comprises a support plate (23), a throwing assembly (24), a second motor (25) and a stirring shaft (26). The upper end of the flocculation tank (1) is provided with a rotatable support plate (23). The upper surface of the support plate (23) is fixedly connected with evenly distributed second motors (25). The lower ends of the output shafts of the second motors (25) are fixedly connected with stirring shafts (26). The left and right ends of the support plate (23) are provided with throwing assemblies (24). The throwing assemblies (24) are respectively located between two adjacent second motors (25). Ozone purification mechanism (7): It is symmetrically arranged at the front and rear ends of the right side of the sedimentation tank (5).

2. A multi-stage purification industrial wastewater treatment system according to claim 1, characterized in that: It also includes a controller (8), which is arranged on the front side of the flocculation tank (1), the input end of the controller (8) is electrically connected to an external power supply, and the input end of the second motor (25) is electrically connected to the output end of the controller (8).

3. A multi-stage purification industrial wastewater treatment system according to claim 2, characterized in that: The flocculation mechanism (2) further comprises an inner gear ring (21) and a rotating assembly (22); the rotating assembly (22) comprises a base (221), a motor (222), a pulley seat (223), a gear (224) and a pulley (225); the left and right sides of the support plate (23) are fixedly connected to the base (221); the front and rear ends of the base (221) are rotatably connected to the pulley seat (223) via a rotating column; the left and right ends of the pulley seat (223) are rotatably connected via a pin shaft A pulley (225) is connected, and the outer arc surface of the pulley (225) is slidably connected to the upper edge of the flocculation tank (1). The middle part of the base (221) is fixedly connected to a motor 1 (222), and the lower end of the output shaft of the motor 1 (222) is fixedly sleeved with a gear (224). The upper end of the flocculation tank (1) is fixedly connected to an inner gear ring (21), and the gear (224) is meshed with the inner gear ring (21). The input end of the motor 1 (222) is electrically connected to the output end of the controller (8).

4. A multi-stage purification industrial wastewater treatment system according to claim 2, characterized in that: The spreading assembly (24) comprises a feeding port (242), a barrel (244), a spreading disc seat (246), a spreading disc (247) and a motor four (248). The left and right ends of the support plate (23) are fixedly connected with the barrel (244). The barrel (244) is respectively located between two adjacent motors two (25). The upper end of the barrel (244) is provided with a feeding port (242). The lower end of the barrel (244) is provided with a spreading disc seat (246). The lower surface of the spreading disc seat (246) is fixedly connected with the motor four (248). The upper end of the output shaft of the motor four (248) is fixedly sleeved with a spreading disc (247). The spreading disc (247) is respectively located inside the spreading disc seat (246). The input end of the motor four (248) is electrically connected to the output end of the controller (8).

5. A multi-stage purification industrial wastewater treatment system according to claim 4, characterized in that: The spreading assembly (24) further comprises a motor three (241), a rotating shaft (243) and a spiral blade (245); the upper end of the barrel (244) is fixedly connected to the motor three (241); the lower end of the output shaft of the motor three (241) is fixedly sleeved with the rotating shaft (243); the upper end of the rotating shaft (243) is provided with evenly distributed stirring rods; the lower end of the rotating shaft (243) is provided with a spiral blade (245); and the input end of the motor three (241) is electrically connected to the output end of the controller (8).

6. A multi-stage purification industrial wastewater treatment system according to claim 1, characterized in that: A sewage inlet (3) is provided on the left side of the flocculation tank (1), and a filter screen (4) arranged obliquely is fixedly connected to the interior of the sewage inlet (3).

7. The multi-stage purification industrial wastewater treatment system according to claim 2, characterized in that: The ozone purification mechanism (7) comprises an ozone treatment tank (72), an air outlet plate (73), an air inlet pipe (74) and an air outlet pipe (75). The ozone treatment tank (72) is placed at the right end of the sedimentation tank (5) and is symmetrically distributed front and back. The ozone treatment tanks (72) are connected to the right end of the sedimentation tank (5) through water inlet pipes. The middle of the upper end of the ozone treatment tank (72) is fixedly connected to the air inlet pipe (74), and the lower end of the air inlet pipe (74) is fixedly connected to the air outlet plate (73). The outer arc surface of the air outlet plate (73) is provided with evenly distributed air outlet holes. The edge of the upper end of the ozone treatment tank (72) is fixedly connected to the air outlet pipe (75), and a recovery pipe is fixedly connected between the two air outlet pipes (75).

8. A multi-stage purification industrial wastewater treatment system according to claim 7, characterized in that: The ozone purification mechanism (7) further comprises an electric butterfly valve (71), and the middle part of the water inlet pipe is provided with the electric butterfly valve (71), and the input end of the electric butterfly valve (71) is electrically connected to the output end of the controller (8).

9. A multi-stage purification industrial wastewater treatment system according to claim 7, characterized in that: The ozone purification mechanism (7) further comprises a liquid level sensor (76), the edges of the upper ends of the ozone treatment tanks (72) are fixedly connected with the liquid level sensors (76), the detection ends of the liquid level sensors (76) are respectively located at the lower ends of the interiors of adjacent ozone treatment tanks (72), and the liquid level sensors (76) are bidirectionally electrically connected to the controller (8).

10. The multi-stage purification industrial wastewater treatment system according to claim 7, characterized in that: The ozone purification mechanism (7) further comprises a water pump (77), an activated carbon treatment tank (78) and an activated carbon filter element (79); an activated carbon treatment tank (78) is placed at the rear end of each ozone treatment tank (72); a water pump (77) is connected in series between the upper end of the activated carbon treatment tank (78) and the lower end of the ozone treatment tank (72) adjacent to the left; and an input end of the water pump (77) is electrically connected to an output end of the controller (8).

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