Oily wastewater treatment device and process

Abstract

The invention relates to the technical field of wastewater treatment, in particular to an oily wastewater treatment device and process. According to the technical scheme, the device comprises a first discharging barrel, an inner barrel, a base, a second discharging barrel, a motor, a pump shell and a screen barrel, the first discharging barrel and the second discharging barrel are arranged above the base, the screen barrel is arranged in the second discharging barrel, a supporting ring is arranged on the inner wall of the second discharging barrel, and a rotating ring rotationally installed in the supporting ring is arranged on the outer wall of the screen barrel; the outer wall of the upper end of the rotating ring is sleeved with a gear ring, a motor and a pump shell are fixedly arranged above the discharging 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 second driven shaft is rotationally installed in the pump shell, and the outer wall of the second driven shaft is sleeved with an impeller. The liquid part in the oil-containing wastewater is sieved and separated through the centrifugal force of the inner barrel rotating chair, large-particle impurities are directly sieved and separated, wastewater treatment is optimized, the separation efficiency of the large-particle impurities is improved, and the wastewater treatment efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of wastewater treatment, and in particular to a device and process for treating oily wastewater. 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 precipitation pretreatment, pH adjustment, oil-water separation, biochemical treatment and activated carbon adsorption. In the pretreatment stage, a long time is required for precipitation, and the water after precipitation can be treated in the next step, which seriously affects the treatment effect of the oily wastewater. The precipitation process of large particle impurities in the wastewater during the wastewater treatment process is very time-consuming, which reduces the treatment efficiency of the oily wastewater. Therefore, those skilled in the art provide an oily wastewater treatment device and process to solve the problems raised in the above background technology. Summary of the invention

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

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

[0006] Preferably, a discharge groove is provided at one end of the inner cylinder, an inclined surface corresponding to the discharge groove is provided 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, an aeration box located inside the inner cylinder is provided at one end of the delivery pipe, and equidistantly distributed air holes are provided inside the upper end of the aeration box. The discharged suspended matter is guided through the discharge groove, and the inclined surface facilitates the upward flow of the 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 at 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 with 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 sleeved with a belt 1. The driving wheel 1 and the driven wheel 1 are linked by a belt 1.

[0009] Preferably, a discharge pipe 1 is provided at the lower end of the discharge cylinder, and a discharge pipe 3 penetrating the discharge pipe 1 is provided at the lower end of the inner cylinder, and the discharge pipe 1 and the discharge pipe 2 are both controlled by valves. The discharge pipe 1 discharges the suspended matter collected inside 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 cylinder is provided with two groups of semicircular buffer plates which are equally spaced and arranged to buffer the oily wastewater transported to the inside of the sieve cylinder.

[0011] Preferably, the inner wall and the inner wall of the upper and lower ends of the rotating ring are rotatably mounted with balls that fit the inner wall of the support ring and are equidistantly distributed. When the rotating ring rotates inside the support ring, the balls roll and fit the inner wall of the support ring, thereby improving the smoothness of the rotating ring during rotation.

[0012] Preferably, the lower end of the sieve cylinder is provided with a discharge pipe 4 penetrating the discharge pipe 3, the discharge cylinder 1, the discharge cylinder 2, the inner cylinder and the lower end of the sieve cylinder are all funnel-shaped, and the discharge pipe 3 and the discharge pipe 3 are both controlled by valves. Large particles of impurities inside the sieve cylinder are discharged through the discharge pipe 4, and the opening and closing of the discharge pipe 1 and the discharge pipe 2 are controlled by the valve, and the funnel-shaped discharge cylinder 1, the discharge cylinder 2, the inner cylinder and the lower end of the sieve cylinder play a role in guiding the oily wastewater and impurities.

[0013] Preferably, the outer wall of the lower end of the screen drum is sleeved with a bottom ring, and support rods distributed in a circular array are arranged between the bottom ring and the rotating ring, and the rotating shaft, the second driven shaft and the second discharge drum are all rotatably installed through a bearing bracket 1. The bottom ring and the rotating ring are supported by the support rods to improve the use strength of the screen drum.

[0014] A process for treating oily wastewater, the steps of the method for treating oily wastewater 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 for rotation. During the rotation of the screen drum, the oily wastewater is received by the buffer plate, and is 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 treatment of suspended matter and pH value;

[0016] S2: At this time, the airflow 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, and the rubber scraper rotates to scrape 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 drives the driving wheel 1 and the driving wheel 2 to rotate at the same time. 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 plays a role in 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 specification of the driving wheel 2 is larger than that of the driven wheel 2, which plays a role in 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 screen drum through a pipeline or a water tank, and large particle impurities are intercepted through the pores inside the screen drum and fall down and discharged inside the screen drum. During the screening process, the screen drum rotates through the cooperation of the driving structure gear and the gear ring to improve the fluidity of the internal input oily wastewater. The input oily wastewater continuously washes the screen drum inside the screen drum to avoid clogging of the inner wall of the screen drum. At the same time, the centrifugal force of the rotation of the screen drum allows the liquid part of the oily wastewater to pass through the screen drum well, avoiding a long sedimentation process. The screened oily wastewater is directly transported to the inner cylinder of the discharge cylinder for pH adjustment and suspended matter treatment. The sedimentation treatment of the oily wastewater is optimized to improve the treatment efficiency of the oily wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0021] Figure 2 It is a schematic diagram of the main stereoscopic structure of the present invention;

[0022] Figure 3 It is a schematic diagram of a main cross-sectional three-dimensional structure of a discharge tube of the present invention;

[0023] Figure 4 It is a schematic diagram of the main cross-sectional three-dimensional structure of the discharge tube of the present invention;

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

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

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

[0027] 1. Discharge tube one; 2. Inner tube; 3. Base; 4. Discharge tube 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 wheel one; 32. Drive wheel one; 33. Drive wheel two; 34. Driven wheel two; 35. Belt two; 36. Bearing bracket one; 37. Bearing bracket two. 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 Figures 1 to 7 , the present invention provides four embodiments:

[0030] Embodiment 1:

[0031] An oily wastewater treatment device comprises 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 screen cylinder 23. The discharge cylinder 1 and the discharge cylinder 2 4 are arranged above the base 3, the screen 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 screen cylinder 23 is provided with a rotating ring 18 rotatably installed 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, and the discharge pipe 2 8 is connected to the inner cylinder 2 by 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 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 cylinder 23, and support rods 19 distributed in a circular array are arranged between the bottom ring 26 and the rotating ring 18;

[0035] First, the oily wastewater passes through the screen drum 23, and the motor 5 drives the rotating shaft 29 to rotate, driving the gear 25 to drive the gear ring 24 to push the screen drum 23 to rotate. The design of the rotating support ring 17 and the buffer plate 22 slows down the falling speed of the wastewater, so that the oily wastewater is separated inside the screen drum 23 by centrifugal force, and large particles of impurities are intercepted and discharged through the discharge pipe, effectively removing large particles of impurities and improving the wastewater treatment efficiency.

[0036] Embodiment 2:

[0037] It 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 installed 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 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 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 cylinder 23, and support rods 19 distributed in a circular array are arranged between the bottom ring 26 and the rotating ring 18;

[0041] First, the oily wastewater passes through the screen drum 23, and the motor 5 drives the rotating shaft 29 to rotate, driving the gear 25 to drive the gear ring 24 to push the screen drum 23 to rotate. The design of the rotating support ring 17 and the buffer plate 22 slows down the falling speed of the wastewater, so that the oily wastewater is separated inside the screen drum 23 by centrifugal force, and large particles of impurities are intercepted and discharged through the discharge pipe, effectively removing large particles of impurities and improving the 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 housing 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 arranged at one side of the upper end of the discharge cylinder 1, a driven shaft 16 is rotatably mounted inside the bearing bracket 2 37, and a rubber scraper 15 is arranged at 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 scrape the suspended matter with the rubber scraper 15 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 agent to improve the water quality of the inner tube 2 and improve the subsequent treatment effect.

[0046] Embodiment three:

[0047] It 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 installed 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 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 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 cylinder 23, and support rods 19 distributed in a circular array are arranged between the bottom ring 26 and the rotating ring 18;

[0051] First, the oily wastewater passes through the screen drum 23, and the motor 5 drives the rotating shaft 29 to rotate, driving the gear 25 to drive the gear ring 24 to push the screen drum 23 to rotate. The design of the rotating support ring 17 and the buffer plate 22 slows down the falling speed of the wastewater, so that the oily wastewater is separated inside the screen drum 23 by centrifugal force, and large particles of impurities are intercepted and discharged through the discharge pipe, effectively removing large particles of impurities and improving the 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 housing 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 arranged at one side of the upper end of the discharge cylinder 1, a driven shaft 16 is rotatably mounted inside the bearing bracket 2 37, and a rubber scraper 15 is arranged at 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 scrape the suspended matter with the rubber scraper 15 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 agent to improve the water quality of the inner tube 2 and improve the subsequent treatment effect.

[0056] A driving wheel 32 is sleeved on the outer wall of the rotating shaft 29, a driven wheel 31 having a radius greater than that of the driving wheel 32 is sleeved on the outer wall of the driven shaft 16, and 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 disposed at the lower end of the discharge cylinder 1, and a discharge pipe 3 11 penetrating the discharge pipe 1 7 is disposed 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 cylinder 23 is provided with a discharge pipe 4 21 penetrating the discharge pipe 3 11. The discharge cylinder 1 1, the discharge cylinder 2 4, the inner cylinder 2 and the lower end of the sieve cylinder 23 are all funnel-shaped, and 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 24 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 subsequent maintenance cost of electrical equipment.

[0061] Embodiment 4:

[0062] A process for treating oily wastewater, the steps of the method for treating oily wastewater 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 the buffer plates 22 are used to carry and guide the flow, so as 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 to treat the suspended matter and pH value.

[0064] S2: At this time, the airflow 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 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 specification of the driving wheel 2 33 is larger than that of the driven wheel 2 34, which plays a role in accelerating the driven shaft 28, thereby driving the impeller 27 to rotate at a high speed and sucking 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-mentioned 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-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.

[0067] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered 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 casing (6) and a screen cylinder (23), characterized in that: A discharge cylinder 1 (1) and a discharge cylinder 2 (4) are arranged above the base (3); a sieve cylinder (23) is arranged inside the discharge cylinder 2 (4); a support ring (17) is arranged on the inner wall of the discharge cylinder 2 (4); a rotating ring (18) rotatably mounted inside the support ring (17) is arranged on the outer wall of the sieve cylinder (23); a gear ring (24) is sleeved on the outer wall of the upper end of the rotating ring (18); a motor (5) and a pump casing (6) are fixed above the discharge pipe; a rotating shaft (29) is arranged at the lower end of the motor (5); a gear (25) meshing with the gear ring (24) is arranged at the lower end of the rotating shaft (29); a discharge pipe 2 (8) is arranged at the lower end of the discharge cylinder 2 (4); the discharge pipe 2 (8) is connected to the inner cylinder (2) by a pump connection; a driven shaft 2 (28) is rotatably mounted inside the pump casing (6); an impeller (27) rotatably mounted inside the pump casing (6) is sleeved on the outer wall of the driven shaft 2 (28).

2. The oily wastewater treatment device according to claim 1, characterized in that: 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).

3. The oily wastewater treatment device according to claim 1, characterized in that: A bearing bracket 2 (37) is provided at 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).

4. The oily wastewater treatment device according to claim 3 is characterized in that: 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 greater 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).

5. The oily wastewater treatment device according to claim 1, characterized in that: The lower end of the discharge tube one (1) is provided with a discharge pipe one (7), and the lower end of the inner tube (2) is provided with a discharge pipe three (11) penetrating the discharge pipe one (7). Both the discharge pipe one (7) and the discharge pipe two (8) are controlled by valves.

6. The oily wastewater treatment device according to claim 1, characterized in that: The inner wall of the screen cylinder (23) is provided with two groups of semicircular buffer plates (22) which are equidistantly distributed.

7. The oily wastewater treatment device according to claim 1, characterized in that: Balls (20) that are rotatably mounted on the interior and inner wall of the upper and lower ends of the rotating ring (18) and that are in contact with the inner wall of the support ring (17) and are distributed at equal distances.

8. 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) penetrating 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.

9. The oily wastewater treatment device according to claim 1, 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 arranged 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 rotatably mounted via a bearing bracket (36).

10. A process for treating oily wastewater, characterized in that: The steps for treating oily wastewater are as follows: S1: The oily wastewater is input into 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 for rotation. During the rotation of the screen drum (23), the oily wastewater is received by the buffer plate (22) and carried and guided by multiple buffer plates (22), thereby 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, the rotating shaft (29) is driven to rotate, and the driving wheel (32) and the driving wheel (33) are driven to rotate. The driving wheel (32) and the driven wheel (31) are linked by the belt (30). Since the radius of the driving wheel (32) is smaller than that of the driven wheel (31), the driven shaft (16) is decelerated. 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). Since the specification of the driving wheel (33) is larger than that of the driven wheel (34), the driven shaft (28) is accelerated, thereby driving the impeller (27) to rotate at a high speed and sucking in the external airflow. The same motor (5) drives the rubber scraper (15) and the impeller (27) to rotate, thereby helping to treat the oily wastewater.

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