Oily wastewater treatment device and process

Abstract

The present invention relates to the field of wastewater treatment technology, and in particular to an oil-containing wastewater treatment device and process. Its technical solution includes a discharge cylinder 1, an inner cylinder, a base, a discharge cylinder 2, a motor, a pump casing and a screen cylinder. Discharge cylinder 1 and discharge cylinder 2 are arranged above the base. A screen cylinder is arranged inside the discharge cylinder 2. A support ring is arranged on the inner wall of the discharge cylinder 2. A rotating ring rotatably installed inside the support ring is arranged on the outer wall of the screen cylinder. A gear ring is sleeved on the outer wall of the upper end of the rotating ring. A motor and a pump casing are fixed above the discharge pipe. A rotating shaft is arranged at the lower end of the motor. A gear is arranged at the lower end of the rotating shaft. A driven shaft 2 is rotatably installed inside the pump casing. An impeller is sleeved on the outer wall of the driven shaft 2. The present invention screens the liquid part of the oil-containing wastewater by the centrifugal force of the inner cylinder rotating chair, and large particles of impurities are directly screened out, thereby optimizing wastewater treatment, making the separation efficiency of large particles of impurities, and improving wastewater treatment efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of wastewater treatment, and in particular to an oily wastewater treatment device and process. Background Art

[0002] A large amount of wastewater is generated in life or industrial production. The wastewater contains oily substances. Direct discharge of oily wastewater will cause environmental pollution.

[0003] The oily wastewater treatment process includes sedimentation pretreatment, pH adjustment, oil-water separation, biochemical treatment, and activated carbon adsorption. During the pretreatment stage, a lengthy precipitation process is required before the precipitated water can be processed for the next step, severely impacting the treatment of the oily wastewater. The precipitation of large impurities in the wastewater during the wastewater treatment process is also very time-consuming, reducing the treatment efficiency of the oily wastewater. Therefore, those skilled in the art have provided an oily wastewater treatment device and process to address the issues raised in the aforementioned background art. Summary of the Invention

[0004] The purpose of the present invention is to address the problems existing in the background technology and to propose an oily wastewater treatment device and process.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an oily wastewater treatment device, comprising a discharge cylinder 1, an inner cylinder, a base, a discharge cylinder 2, a motor, a pump casing and a sieve cylinder, wherein discharge cylinder 1 and discharge cylinder 2 are arranged above the base, a sieve cylinder is arranged inside the discharge cylinder 2, a support ring is provided on the inner wall of the discharge cylinder 2, a rotating ring rotatably mounted inside the support ring is provided on the outer wall of the sieve cylinder, a gear ring is sleeved on the outer wall of the upper end of the rotating ring, a motor and a pump casing are fixed above the discharge pipe, a rotating shaft is provided at the lower end of the motor, a gear meshing with the gear ring is provided at the lower end of the rotating shaft, a discharge pipe 2 is provided at the lower end of the discharge cylinder 2, the discharge pipe 2 is connected to the interior of the inner cylinder by a pump connection, a driven shaft 2 is rotatably mounted inside the pump casing, and an impeller rotatably mounted inside the pump casing is sleeved on the outer wall of the driven shaft 2.

[0006] Preferably, a discharge groove is formed at one end of the inner cylinder, and an inclined surface corresponding to the discharge groove is formed on the inner wall of the lower end of the inner cylinder. A delivery pipe is provided at the output end of the pump housing, and an aeration box is provided at one end of the delivery pipe, which is located inside the inner cylinder. The upper end of the aeration box has equidistantly distributed air holes. The discharge groove guides the discharged suspended matter, and the inclined surface facilitates the upward flow of suspended matter and bubbles.

[0007] Preferably, a bearing bracket 2 is provided on one side of the upper end of the discharge cylinder 1, a driven shaft 1 is rotatably mounted inside the bearing bracket 2, and a rubber scraper is provided on the lower end of the driven shaft. The driven shaft 1 is rotatably supported by the bearing bracket 2, so that the driven shaft 1 rotates inside the discharge cylinder.

[0008] Preferably, the outer wall of the rotating shaft is sleeved with a driving wheel 1, the outer wall of the driven shaft 1 is sleeved with a driven wheel 1 having a radius larger than that of the driving wheel 1, and the outer walls of the driving wheel 1 and the driven wheel 1 are both sleeved with a belt 1. The driving wheel 1 and the driven wheel 1 are linked by the belt 1.

[0009] Preferably, a discharge pipe 1 is provided at the lower end of the discharge cylinder, and a discharge pipe 3 is provided at the lower end of the inner cylinder, which passes through the discharge pipe 1. Both the discharge pipe 1 and the discharge pipe 2 are controlled by valves. The discharge pipe 1 discharges suspended matter collected in the discharge cylinder, and the oily wastewater on the inner wall of the inner cylinder is discharged through the discharge pipe 3.

[0010] Preferably, the inner wall of the sieve drum is provided with two groups of semicircular buffer plates which are equidistantly distributed and buffer the oily wastewater transported into the sieve drum.

[0011] Preferably, balls are rotatably mounted on the inner wall and upper and lower ends of the rotating ring, which are in contact with the inner wall of the support ring and are equidistantly distributed. When the rotating ring rotates inside the support ring, the balls roll and contact with the inner wall of the support ring, thereby improving the smoothness of the rotating ring's rotation.

[0012] Preferably, a discharge pipe 4 is provided at the lower end of the sieve drum, which passes through the discharge pipe 3. The discharge pipe 1, discharge pipe 2, inner drum, and lower end of the sieve drum are all funnel-shaped, and the discharge pipes 3 and 4 are both controlled by valves. Large particles of impurities inside the sieve drum are discharged through the discharge pipe 4, and the opening and closing of the discharge pipes 1 and 2 are controlled by a valve. The funnel-shaped discharge pipes 1, 2, inner drum, and lower end of the sieve drum serve to divert oily wastewater and impurities.

[0013] Preferably, a bottom ring is sleeved on the outer wall of the lower end of the screen drum. Support rods arranged in an annular array are provided between the bottom ring and the rotating ring. The rotating shaft, the second driven shaft, and the second discharge drum are all rotatably mounted via a first bearing bracket. The bottom ring and the rotating ring are supported by the support rods, thereby improving the operational strength of the screen drum.

[0014] A process for treating oily wastewater, the steps of the oily wastewater treatment method are as follows:

[0015] S1: The oily wastewater is input into the screen drum, the motor drives the rotating shaft to rotate, and the rotating shaft drives the gear to push the gear ring. Because the screen drum rotates inside the support ring through the rotating ring, the screen drum is supported by the rotation. During the rotation of the screen drum, the oily wastewater is received by the buffer plate and carried and diverted by multiple buffer plates to slow down the falling speed of the oily wastewater. Because when the screen drum rotates, the oily wastewater passes through the screen drum by centrifugal force, and large particles of impurities are intercepted inside the screen drum and discharged through the discharge pipe 4. The oily wastewater passing through the screen drum is pumped into the inner drum through the discharge pipe for suspended matter and pH value treatment;

[0016] S2: At this time, the air flow sucked by the pump casing enters the aeration box through the delivery pipe and is discharged through the air holes of the aeration box. The densely distributed bubbles flow upward, thereby lifting the suspended matter. The rubber scraper rotates, scraping the suspended matter floating on the upper end of the inner cylinder. When passing through the discharge trough, the suspended matter is pushed out of the inner cylinder, received by the discharge cylinder 1, and transported to the outside through the discharge pipe 1;

[0017] S3: When the motor is driven, it drives the rotating shaft to rotate, and at the same time drives the driving wheel 1 and the driving wheel 2 to rotate. The driving wheel 1 and the driven wheel 1 are linked by belt 1, and the radius of the driving wheel 1 is smaller than that of the driven wheel 1, which has the effect of slowing down the driven shaft 1. The rubber scraper slowly scrapes the upper end of the inner cylinder. The driving wheel 2 and the driven wheel 2 are linked by belt 2, and the specifications of the driving wheel 2 are larger than those of the driven wheel 2, which has the effect of accelerating the driven shaft 2, thereby driving the impeller to rotate at high speed and sucking in the external airflow. The same motor drives the rotation of the rubber scraper and the impeller to assist in the treatment of oily wastewater.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The oily wastewater of the present invention is continuously transported to the inside of the sieve drum through a pipe or a water tank, and large particulate matter impurities are intercepted through the pores inside the sieve drum and fall down and discharged inside the sieve drum. During the screening process, the sieve drum rotates through the cooperation of the driving structure gear and the gear ring, thereby improving the fluidity of the internal input oily wastewater. The input oily wastewater continuously flushes the sieve drum inside the sieve drum to avoid clogging of the inner wall of the sieve drum. At the same time, the centrifugal force of the rotation of the sieve drum allows the liquid part of the oily wastewater to pass through the sieve drum well, avoiding a long sedimentation process. The screened oily wastewater is directly transported to the inner cylinder of the discharge drum for pH value adjustment and suspended matter treatment. By optimizing the sedimentation treatment of the oily wastewater, the treatment efficiency of the oily wastewater is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic top view of the three-dimensional structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the main three-dimensional structure of the present invention;

[0022] Figure 3 This is a schematic diagram of a main cross-sectional perspective structure of a discharge tube according to the present invention;

[0023] Figure 4 This is a schematic diagram of the second main cross-sectional perspective structure of the discharge tube of the present invention;

[0024] Figure 5 This is a schematic diagram of the main three-dimensional structure of the screen drum of the present invention;

[0025] Figure 6 This is a schematic diagram of the three-dimensional structure of the pump casing of the present invention in a top cross-sectional view;

[0026] Figure 7 It is a bottom-up three-dimensional structural diagram of the motor of the present invention.

[0027] Figure numerals: 1. Discharge cylinder one; 2. Inner cylinder; 3. Base; 4. Discharge cylinder two; 5. Motor; 6. Pump casing; 7. Discharge pipe one; 8. Discharge pipe two; 9. Discharge trough; 10. Inclined surface; 11. Discharge pipe three; 12. Aeration box; 13. Air hole; 14. Delivery pipe; 15. Rubber scraper; 16. Driven shaft one; 17. Support ring; 18. Rotating ring; 19. Support rod; 20. Ball; 21. Discharge pipe four; 22. Buffer plate; 23. Screen cylinder; 24. Gear ring; 25. Gear; 26. Bottom ring; 27. Impeller; 28. Driven shaft two; 29. ​​Rotating shaft; 30. Belt one; 31. Driven pulley one; 32. Drive pulley one; 33. Drive pulley two; 34. Driven pulley two; 35. Belt two; 36. Bearing bracket one; 37. Bearing bracket two. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0029] See also Figures 1 to 7 , the present invention provides four embodiments:

[0030] Example 1:

[0031] An oily wastewater treatment device includes a discharge cylinder 1, an inner cylinder 2, a base 3, a discharge cylinder 2, a motor 5, a pump casing 6, and a screen cylinder 23. The discharge cylinder 1 and the discharge cylinder 2 are arranged above the base 3. The screen cylinder 23 is arranged inside the discharge cylinder 2, the inner wall of the discharge cylinder 2 is provided with a support ring 17, the outer wall of the screen cylinder 23 is provided with a rotating ring 18 rotatably mounted inside the support ring 17, the outer wall of the upper end of the rotating ring 18 is sleeved with a gear ring 24, the motor 5 and the pump casing 6 are fixed above the discharge pipe, the lower end of the motor 5 is provided with a rotating shaft 29, the lower end of the rotating shaft 29 is provided with a gear 25 meshing with the gear ring 24, the lower end of the discharge cylinder 2 is provided with a discharge pipe 28, and the discharge pipe 28 is connected to the interior of the inner cylinder 2 via a pump connection;

[0032] The inner wall of the screen drum 23 is provided with two groups of semicircular buffer plates 22 which are equally spaced.

[0033] The inner wall and the inner surface of the upper and lower ends of the rotating ring 18 are rotatably mounted with balls 20 that fit in contact with the inner wall of the support ring 17 and are equidistantly distributed.

[0034] A bottom ring 26 is sleeved on the outer wall of the lower end of the screen drum 23, and support rods 19 distributed in a circular array are provided between the bottom ring 26 and the rotating ring 18;

[0035] First, the oily wastewater passes through sieve drum 23. Motor 5 drives shaft 29, which in turn drives gear 25 against ring gear 24 to rotate sieve drum 23. The design of rotating support ring 17 and buffer plate 22 slows the falling speed of the wastewater, allowing the oily wastewater to separate inside sieve drum 23 through centrifugal force. Large impurities are intercepted and discharged through the discharge pipe, effectively removing large impurities and improving wastewater treatment efficiency.

[0036] Example 2:

[0037] It includes a discharge cylinder 1, an inner cylinder 2, a base 3, a discharge cylinder 2 4, a motor 5, a pump casing 6 and a sieve cylinder 23. The discharge cylinder 1 and the discharge cylinder 2 4 are arranged above the base 3. The sieve cylinder 23 is arranged inside the discharge cylinder 2 4. The inner wall of the discharge cylinder 2 4 is provided with a support ring 17. The outer wall of the sieve cylinder 23 is provided with a rotating ring 18 rotatably mounted inside the support ring 17. The outer wall of the upper end of the rotating ring 18 is sleeved with a gear ring 24. The motor 5 and the pump casing 6 are fixed above the discharge pipe. The lower end of the motor 5 is provided with a rotating shaft 29. The lower end of the rotating shaft 29 is provided with a gear 25 meshing with the gear ring 24. The lower end of the discharge cylinder 2 4 is provided with a discharge pipe 2 8. The discharge pipe 2 8 is connected to the interior of the inner cylinder 2 through a pump connection.

[0038] The inner wall of the screen drum 23 is provided with two groups of semicircular buffer plates 22 which are equally spaced.

[0039] The inner wall and the inner surface of the upper and lower ends of the rotating ring 18 are rotatably mounted with balls 20 that fit in contact with the inner wall of the support ring 17 and are equidistantly distributed.

[0040] A bottom ring 26 is sleeved on the outer wall of the lower end of the screen drum 23, and support rods 19 distributed in a circular array are provided between the bottom ring 26 and the rotating ring 18;

[0041] First, the oily wastewater passes through sieve drum 23. Motor 5 drives shaft 29, which in turn drives gear 25 against ring gear 24 to rotate sieve drum 23. The design of rotating support ring 17 and buffer plate 22 slows the falling speed of the wastewater, allowing the oily wastewater to separate inside sieve drum 23 through centrifugal force. Large impurities are intercepted and discharged through the discharge pipe, effectively removing large impurities and improving wastewater treatment efficiency.

[0042] A driven shaft 28 is rotatably mounted inside the pump housing 6 , and an impeller 27 rotatably mounted inside the pump housing 6 is sleeved on an outer wall of the driven shaft 28 .

[0043] A discharge groove 9 is provided at one end of the inner tube 2, and an inclined surface 10 corresponding to the discharge groove 9 is provided on the inner wall of the lower end of the inner tube 2. A delivery pipe 14 is provided at the output end of the pump casing 6, and an aeration box 12 located inside the inner tube 2 is provided at one end of the delivery pipe 14. The upper end of the aeration box 12 is provided with equidistantly distributed air holes 13.

[0044] A bearing bracket 2 37 is provided on one side of the upper end of the discharge cylinder 1, and a driven shaft 16 is rotatably installed inside the bearing bracket 2 37. A rubber scraper 15 is provided on the lower end of the driven shaft 16.

[0045] The airflow enters the aeration box 12 through the conveying pipe, and the dense bubbles are discharged through the air holes 13, which lift the suspended matter and the rubber scraper 15 scrapes the suspended matter to remove the suspended matter and discharge it through the discharge pipe 7. At the same time, the pH value of the oily wastewater powder is adjusted through the chemical, which improves the water quality of the inner tube 2 and enhances the subsequent treatment effect.

[0046] Example 3:

[0047] It includes a discharge cylinder 1, an inner cylinder 2, a base 3, a discharge cylinder 2 4, a motor 5, a pump casing 6 and a sieve cylinder 23. The discharge cylinder 1 and the discharge cylinder 2 4 are arranged above the base 3. The sieve cylinder 23 is arranged inside the discharge cylinder 2 4. The inner wall of the discharge cylinder 2 4 is provided with a support ring 17. The outer wall of the sieve cylinder 23 is provided with a rotating ring 18 rotatably mounted inside the support ring 17. The outer wall of the upper end of the rotating ring 18 is sleeved with a gear ring 24. The motor 5 and the pump casing 6 are fixed above the discharge pipe. The lower end of the motor 5 is provided with a rotating shaft 29. The lower end of the rotating shaft 29 is provided with a gear 25 meshing with the gear ring 24. The lower end of the discharge cylinder 2 4 is provided with a discharge pipe 2 8. The discharge pipe 2 8 is connected to the interior of the inner cylinder 2 through a pump connection.

[0048] The inner wall of the screen drum 23 is provided with two groups of semicircular buffer plates 22 which are equally spaced.

[0049] The inner wall and the inner surface of the upper and lower ends of the rotating ring 18 are rotatably mounted with balls 20 that fit in contact with the inner wall of the support ring 17 and are equidistantly distributed.

[0050] A bottom ring 26 is sleeved on the outer wall of the lower end of the screen drum 23, and support rods 19 distributed in a circular array are provided between the bottom ring 26 and the rotating ring 18;

[0051] First, the oily wastewater passes through sieve drum 23. Motor 5 drives shaft 29, which in turn drives gear 25 against ring gear 24 to rotate sieve drum 23. The design of rotating support ring 17 and buffer plate 22 slows the falling speed of the wastewater, allowing the oily wastewater to separate inside sieve drum 23 through centrifugal force. Large impurities are intercepted and discharged through the discharge pipe, effectively removing large impurities and improving wastewater treatment efficiency.

[0052] A driven shaft 28 is rotatably mounted inside the pump housing 6 , and an impeller 27 rotatably mounted inside the pump housing 6 is sleeved on an outer wall of the driven shaft 28 .

[0053] A discharge groove 9 is provided at one end of the inner tube 2, and an inclined surface 10 corresponding to the discharge groove 9 is provided on the inner wall of the lower end of the inner tube 2. A delivery pipe 14 is provided at the output end of the pump casing 6, and an aeration box 12 located inside the inner tube 2 is provided at one end of the delivery pipe 14. The upper end of the aeration box 12 is provided with equidistantly distributed air holes 13.

[0054] A bearing bracket 2 37 is provided on one side of the upper end of the discharge cylinder 1, and a driven shaft 16 is rotatably installed inside the bearing bracket 2 37. A rubber scraper 15 is provided on the lower end of the driven shaft 16.

[0055] The airflow enters the aeration box 12 through the conveying pipe, and the dense bubbles are discharged through the air holes 13, which lift the suspended matter and the rubber scraper 15 scrapes the suspended matter to remove the suspended matter and discharge it through the discharge pipe 7. At the same time, the pH value of the oily wastewater powder is adjusted through the chemical, which improves the water quality of the inner tube 2 and enhances the subsequent treatment effect.

[0056] A driving wheel 32 is sleeved on the outer wall of the rotating shaft 29, and a driven wheel 31 having a radius larger than that of the driving wheel 32 is sleeved on the outer wall of the driven shaft 16. A belt 30 is sleeved on the outer walls of both the driving wheel 32 and the driven wheel 31.

[0057] A discharge pipe 1 7 is provided at the lower end of the discharge cylinder 1, and a discharge pipe 3 11 penetrating the discharge pipe 1 7 is provided at the lower end of the inner cylinder 2. Both the discharge pipe 1 7 and the discharge pipe 2 8 are controlled by valves.

[0058] The lower end of the sieve drum 23 is provided with a discharge pipe 4 21 which passes through the discharge pipe 3 11. The discharge drum 1 1, the discharge drum 2 4, the inner drum 2 and the lower end of the sieve drum 23 are all funnel-shaped. The discharge pipe 3 11 and the discharge pipe 3 11 are both controlled by valves.

[0059] The rotating shaft 29, the driven shaft 28 and the discharge cylinder 2 4 are all rotatably mounted via a bearing bracket 1 36;

[0060] The motor 5 drives the rotating shaft 29 to drive the driving wheel and the rubber scraper 15 to scrape slowly, ensuring the continuous discharge of suspended matter during wastewater treatment. In addition, the driving wheel 1 32 and the driven wheel 1 31 are linked by the belt 1 30, and the driving wheel 2 33 and the driven wheel 2 34 are linked by the belt 2 35, thereby realizing the rotation of the driven shaft 16 and the driven shaft 2 28, which is conducive to the continuous progress of wastewater treatment. The overall design effectively improves the stable progress of wastewater treatment, while reducing the use of electrical equipment, reducing energy consumption, and reducing the maintenance cost of subsequent electrical equipment.

[0061] Example 4:

[0062] A process for treating oily wastewater, the steps of the oily wastewater treatment method are as follows:

[0063] S1: The oily wastewater is input into the screen drum 23, the motor 5 drives the rotating shaft 29 to rotate, and the rotating shaft 29 drives the gear 25 to push the gear ring 24. Because the screen drum 23 rotates inside the support ring 17 through the rotating ring 18, the screen drum 23 is supported for rotation. During the rotation of the screen drum 23, the oily wastewater is received by the buffer plate 22 and carried and diverted by multiple buffer plates 22 to slow down the falling speed of the oily wastewater. Because when the screen drum 23 rotates, the oily wastewater passes through the screen drum 23 by centrifugal force, and large particles of impurities are intercepted inside the screen drum 23 and discharged through the discharge pipe 21. The oily wastewater passing through the screen drum 23 is pumped into the inner drum 2 through the discharge pipe for treatment of suspended matter and pH value;

[0064] S2: At this time, the air flow sucked by the pump housing 6 enters the interior of the aeration box 12 through the delivery pipe 14 and is discharged through the air holes 13 of the aeration box 12. The densely distributed bubbles flow upward, thereby lifting the suspended matter. The rubber scraper 15 rotates to scrape the suspended matter floating on the upper end of the inner tube 2. When passing through the discharge trough 9, the suspended matter is pushed out of the inner tube 2, received by the discharge tube 1, and transported to the outside through the discharge pipe 7.

[0065] S3: When the motor 5 is driven, it drives the rotating shaft 29 to rotate, and at the same time drives the driving wheel 1 32 and the driving wheel 2 33 to rotate. The driving wheel 1 32 and the driven wheel 1 31 are linked by the belt 1 30, and the radius of the driving wheel 1 32 is smaller than that of the driven wheel 1 31, which plays a role in slowing down the driven shaft 16. The rubber scraper 15 slowly scrapes the upper end of the inner cylinder 2. The driving wheel 2 33 and the driven wheel 2 34 are linked by the belt 2 35, and the specifications of the driving wheel 2 33 are larger than those of the driven wheel 2 34, which plays a role in accelerating the driven shaft 2 28, thereby driving the impeller 27 to rotate at high speed and sucking in the external airflow. The same motor 5 drives the rotation of the rubber scraper 15 and the impeller 27 to assist in the treatment of oily wastewater.

[0066] The above specific embodiments are only several preferred embodiments of the present invention. Based on the technical solutions of the present invention and the relevant inspirations of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

[0067] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. An oily wastewater treatment device, comprising a discharge cylinder (1), an inner cylinder (2), a base (3), a discharge cylinder (4), a motor (5), a pump housing (6) and a screen cylinder (23), characterized in that: A discharge cylinder 1 (1) and a discharge cylinder 2 (4) are provided above the base (3), a screen cylinder (23) is provided inside the discharge cylinder 2 (4), a support ring (17) is provided on the inner wall of the discharge cylinder 2 (4), a rotating ring (18) rotatably mounted inside the support ring (17) is provided on the outer wall of the screen cylinder (23), a gear ring (24) is sleeved on the outer wall of the upper end of the rotating ring (18), a rotating shaft (29) is provided at the lower end of the motor (5), a gear (25) meshing with the gear ring (24) is provided at the lower end of the rotating shaft (29), a discharge pipe 2 (8) is provided at the lower end of the discharge cylinder 2 (4), the discharge pipe 2 (8) is connected to the inside of the inner cylinder (2) by a pump connection, a driven shaft 2 (28) is rotatably mounted inside the pump housing (6), and an impeller (27) rotatably mounted inside the pump housing (6) is sleeved on the outer wall of the driven shaft 2 (28); A discharge groove (9) is provided at one end of the inner cylinder (2), an inclined surface (10) corresponding to the discharge groove (9) is provided on the inner wall of the lower end of the inner cylinder (2), a delivery pipe (14) is provided at the output end of the pump housing (6), an aeration box (12) located inside the inner cylinder (2) is provided at one end of the delivery pipe (14), and equidistantly distributed air holes (13) are provided inside the upper end of the aeration box (12); A bearing bracket 2 (37) is provided on one side of the upper end of the discharge cylinder 1 (1), a driven shaft 1 (16) is rotatably mounted inside the bearing bracket 2 (37), and a rubber scraper (15) is provided at the lower end of the driven shaft 1 (16); The outer wall of the rotating shaft (29) is sleeved with a driving wheel (32), the outer wall of the driven shaft (16) is sleeved with a driven wheel (31) having a radius larger than that of the driving wheel (32), and the outer walls of the driving wheel (32) and the driven wheel (31) are both sleeved with a belt (30); The lower end of the discharge cylinder 1 (1) is provided with a discharge pipe 1 (7), and the lower end of the inner cylinder (2) is provided with a discharge pipe 3 (11) penetrating the discharge pipe 1 (7), and both the discharge pipe 1 (7) and the discharge pipe 2 (8) are controlled by valves; The inner wall of the sieve drum (23) is provided with two groups of semicircular buffer plates (22) that are equally spaced. Balls (20) are rotatably mounted on the interior and inner wall of the upper and lower ends of the rotating ring (18), and are in contact with the inner wall of the support ring (17) and are distributed at equal distances.

2. The oily wastewater treatment device according to claim 1, characterized in that: The lower end of the sieve cylinder (23) is provided with a discharge pipe four (21) that penetrates the discharge pipe three (11). The lower ends of the discharge cylinder one (1), the discharge cylinder two (4), the inner cylinder (2) and the sieve cylinder (23) are all funnel-shaped. The discharge pipe three (11) and the discharge pipe three (11) are both controlled by valves.

3. The oily wastewater treatment device according to claim 2, characterized in that: The outer wall of the lower end of the screen drum (23) is sleeved with a bottom ring (26), and support rods (19) distributed in a ring array are provided between the bottom ring (26) and the rotating ring (18). The rotating shaft (29), the second driven shaft (28) and the second discharge drum (4) are all rotatably mounted through a bearing bracket (36).

4. A process for treating oily wastewater, characterized in that: Using an oily wastewater treatment device according to claim 3, the steps of the oily wastewater treatment method are as follows: S1: The oily wastewater is input into the inside of the screen drum (23), and the motor (5) drives the rotating shaft (29) to rotate. The rotating shaft (29) drives the gear (25) to push the gear ring (24). Because the screen drum (23) rotates inside the support ring (17) through the rotating ring (18), the screen drum (23) is supported and rotated. During the rotation of the screen drum (23), the oily wastewater is received by the buffer plate (22) and carried and diverted by multiple buffer plates (22), slowing down the falling speed of the oily wastewater. Because when the screen drum (23) rotates, the oily wastewater passes through the screen drum (23) by centrifugal force, and large particles of impurities are intercepted inside the screen drum (23) and discharged through the discharge pipe (21). The oily wastewater passing through the screen drum (23) is pumped into the inner drum (2) through the discharge pipe for treatment of suspended matter and pH value. S2: At this time, the air flow sucked by the pump housing (6) enters the interior of the aeration box (12) through the delivery pipe (14), and is discharged through the air holes (13) of the aeration box (12). The densely distributed bubbles flow upward, thereby lifting the suspended matter, and the rubber scraper (15) rotates to scrape the suspended matter floating on the upper end of the inner cylinder (2). When passing through the discharge trough (9), the suspended matter is pushed out of the inner cylinder (2), received by the discharge cylinder (1), and transported to the outside through the discharge pipe (7); S3: When the motor (5) is driven, it drives the rotating shaft (29) to rotate, and at the same time drives the driving wheel (32) and the driving wheel (33) to rotate. The driving wheel (32) and the driven wheel (31) are linked by the belt (30), and the radius of the driving wheel (32) is smaller than that of the driven wheel (31), which plays a role in slowing down the driven shaft (16). The rubber scraper (15) slowly scrapes the upper end of the inner cylinder (2). The driving wheel (33) and the driven wheel (34) are linked by the belt (35), and the specification of the driving wheel (33) is larger than that of the driven wheel (34), which plays a role in accelerating the driven shaft (28), thereby driving the impeller (27) to rotate at a high speed and sucking in the external airflow. The same motor (5) drives the rotation of the rubber scraper (15) and the impeller (27), thereby assisting in the treatment of oily wastewater.

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