Oily wastewater treatment device and treatment process

Abstract

The invention relates to the technical field of sewage treatment, and discloses an oily sewage treatment device and a treatment process. The oily sewage treatment device comprises a treatment shell, a water inlet pipe is arranged on the top of the treatment shell, a premixing tank is movably arranged inside the treatment shell, and a driving motor is arranged on the top of the treatment shell; a feeding mechanism is arranged at the bottom of the premixing tank, and the feeding mechanism comprises an emulsification feeding pipe extending to the bottom of the premixing tank. In the present invention, as sewage in the water inlet pipe is injected, the emulsification feeding pipe automatically injects emulsification liquid into the premixing tank to fully mix the sewage and the emulsification liquid, and the obliquely arranged guide protrusion can drive the sewage to rotate and flow down along the outer wall of the premixing tank during the process of rotating with the premixing tank, and water and oil in the sewage are initially separated under the action of centrifugal force, and the initially separated sewage flows to the bottom of the treatment shell and is further statically separated, so as to improve the water-oil separation efficiency of the oily sewage.

Description

Technical Field

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

[0002] In sewage treatment, when using treatment equipment for oily sewage, the common method is static sedimentation, which has the problem of not being able to efficiently separate water and oil in the oily sewage. Therefore, there is an urgent need for an oily sewage treatment device to solve the above technical problems. Summary of the invention

[0003] The purpose of the present invention is to solve the shortcomings of the prior art and to propose an oily wastewater treatment device and a treatment process.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] An oily wastewater treatment device comprises a treatment shell, wherein a water inlet pipe is arranged on the top of the treatment shell, a premixing tank is movably arranged inside the treatment shell, and a driving motor is arranged on the top of the treatment shell for driving the premixing tank to rotate horizontally; a feeding mechanism is arranged at the bottom of the premixing tank for feeding demulsified liquid into the premixing tank, and the feeding mechanism comprises a demulsified feeding pipe extending to the bottom of the premixing tank; a blocking mechanism is arranged on the inner wall of the bottom of the premixing tank, and the blocking mechanism comprises a fixed rod installed on the inner wall of the bottom of the premixing tank through a mounting rod 2, a movable sleeve is sleeved on the fixed rod, and a movable side wing 1 is arranged on one side wall of the movable sleeve, and a movable side wing 1 is close to an opening of the demulsified feeding pipe. A blocking component is arranged on the side, and the side of the movable side wing one is connected to the inner wall of the premixing tank through a reset spring; the other side wall of the movable sleeve is provided with a movable side wing two, and the side position of the movable side wing two corresponds to the opening position of the water inlet pipe; a stirring mechanism is arranged inside the premixing tank for stirring the sewage and demulsifier in the premixing tank; an extending protrusion is arranged on the top of the circumferential outer wall of the premixing tank for mixing the sewage and the demulsifier flowing downward along the outer wall of the premixing tank; the circumferential outer wall of the premixing tank is provided with diversion protrusions arranged at intervals, the diversion protrusions are inclined, and the diversion protrusions are located at the bottom of the extending protrusions, which are used to divert the sewage flowing downstream between the treatment shell and the premixing tank.

[0006] Preferably, one end of the extending protrusion away from the premixing tank abuts against the inner wall of the processing shell, and one end of the guiding protrusion away from the premixing tank abuts against the inner wall of the processing shell; the inclination direction of the guiding protrusion is consistent with the rotation direction of the premixing tank.

[0007] Preferably, the bottom inner wall of the processing shell is concentrically provided with partition plate one, partition plate two and partition plate three, partition plate two and partition plate three are located inside partition plate one, and partition plate three is located inside partition plate two; an oil outlet pipe and a water outlet pipe are provided at the bottom of the processing shell, one end of the oil outlet pipe is located inside partition plate three, and one end of the water outlet pipe is located between partition plate three and partition plate two.

[0008] Preferably, a perforation one is provided at the bottom of the circumference of the second partition plate, the opening position of the perforation one is higher than the opening position of the water outlet pipe in the treatment shell, and the height of the second partition plate is higher than the first and third partition plates.

[0009] Preferably, the circumferential outer wall of the premixing tank is provided with an annularly arranged flow-guiding wing, which is located at the bottom of the flow-guiding protrusion, and a gap is left between the side of the flow-guiding wing away from the premixing tank and the inner wall of the processing shell.

[0010] Preferably, the gap between the side edge of the guide wing and the inner wall of the processing shell is 1-5 cm.

[0011] Preferably, an annular fixing seat is installed on the top inner wall of the processing shell, and an annular connecting seat is provided on the bottom movable sleeve of the annular fixing seat, and the bottom of the annular connecting seat is connected to the premixing tank through a mounting rod.

[0012] Preferably, the circumferential inner wall of the annular connecting seat is provided with annularly distributed driven teeth, and the output end of the drive motor is provided with a driving gear, and the circumference of the driving gear is meshed with the driven teeth; the stirring mechanism includes a rotating shaft movably mounted on the top inner wall of the processing shell, and the end of the rotating shaft extending to the interior of the premixing tank is provided with a stirring component, and the rotating shaft is provided with a driven gear, and a transmission gear is movably mounted on the top inner wall of the processing shell, and the circumference of the transmission gear is meshed with the circumference of the driven gear and the driven teeth.

[0013] Preferably, a second through-hole is formed on the side of the movable side wing one; and a third through-hole is formed on the side of the movable side wing two close to the movable sleeve.

[0014] Preferably, the feeding mechanism includes a transition shell arranged on the outer wall of the bottom of the premixing tank, the transition shell is an annular structure, one end of the demulsification feeding pipe extending to the outside of the premixing tank is located inside the transition shell, the outer wall of the transition shell is connected to the inner wall of the processing shell through a connecting rod, and a conveying pipe is provided on one side of the transition shell for injecting demulsification liquid into the transition shell.

[0015] The above-mentioned treatment process of the oily wastewater treatment device includes the following steps: when in use, the wastewater to be treated is injected into the premixing tank through the water inlet pipe. As the wastewater in the water inlet pipe is injected, the movable side wing 2 flips downward under the impact of the wastewater. At this time, the movable sleeve rotates relative to the fixed rod, that is, the movable side wing 1 is driven to flip upward relative to the fixed rod. At this time, the blocking component is removed from the opening of the demulsification feeding pipe, and the demulsification feeding pipe injects demulsification liquid into the premixing tank. The demulsification liquid injected by the demulsification feeding pipe impacts and mixes with the wastewater injected by the water inlet pipe, and the stirring mechanism stirs the wastewater and demulsification liquid in the premixing tank. Mixing. With the continuous injection of sewage, the sewage overflows from the top of the premixing tank to the outside of the premixing tank. At this time, the sewage flows downward between the outer wall of the premixing tank and the inner wall of the treatment shell. At the same time, the driving motor drives the premixing tank to rotate horizontally. The extending protrusion further stirs and mixes the sewage and demulsified liquid flowing downward from the outer wall of the premixing tank. The diversion protrusion diverts the mixed sewage, and the sewage flows downward between two adjacent diversion protrusions. When the water inlet pipe stops injecting sewage, the movable side wing is reset under the elastic action of the reset spring. At this time, the blocking component blocks the opening of the demulsified feeding pipe to stop the feeding of the demulsified liquid.

[0016] The beneficial effects of the present invention are:

[0017] When in use, with the injection of sewage in the water inlet pipe, the demulsifier feeding pipe automatically injects demulsifier into the premixing tank, the demulsifier injected by the demulsifier feeding pipe impacts and mixes with the sewage injected by the water inlet pipe, and the sewage overflows from the top of the premixing tank to the outside of the premixing tank, at this time, the sewage flows downward from the outer wall of the premixing tank and the inner wall of the treatment shell, and at the same time, the driving motor drives the premixing tank to rotate horizontally, and the extending protrusion further stirs and mixes the sewage and demulsifier flowing downward from the outer wall of the premixing tank, and the diversion protrusion diverts the mixed sewage, so that the sewage flows downward between two adjacent diversion protrusions, thereby realizing the diversion of sewage, and the inclined diversion protrusion can drive the sewage to rotate along the outer wall of the premixing tank during the rotation of the premixing tank, and in the process of the sewage rotating and flowing downward, the water and oil in the sewage are initially separated under the action of centrifugal force, and the initially separated sewage flows to the bottom of the treatment shell and is further statically separated, which can improve the water-oil separation efficiency of the oily sewage. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure of an oily wastewater treatment device proposed in an embodiment of the present invention;

[0019] Figure 2 This is a first-view structural cross-sectional view of an overall oily wastewater treatment device proposed in an embodiment of the present invention;

[0020] Figure 3 for Figure 2 A magnified view of the local structure at point A in the middle;

[0021] Figure 4 for Figure 2 A magnified view of the local structure at B in the middle;

[0022] Figure 5 A schematic diagram of the structure of a plugging mechanism for an oily wastewater treatment device proposed in an embodiment of the present invention;

[0023] Figure 6 It is a cross-sectional view of the overall structure from a second viewing angle of an oily wastewater treatment device proposed in an embodiment of the present invention;

[0024] Figure 7 A schematic diagram of the structure of a premixing tank and an annular connecting seat of an oily wastewater treatment device proposed in an embodiment of the present invention;

[0025] Figure 8 This is a schematic diagram of the structure of a stirring mechanism of an oily wastewater treatment device proposed in an embodiment of the present invention.

[0026] In the figure: 1-processing shell, 2-water inlet pipe, 3-drive motor, 4-oil outlet pipe, 5-water outlet pipe, 6-premixing tank, 7-stirring mechanism, 71-stirring component, 72-rotating shaft, 8-feeding mechanism, 81-transition shell, 82-transport pipe, 83-demulsification feeding pipe, 9-partition plate 2, 10-partition plate 1, 11-partition plate 3, 12-installation rod 1, 13-perforation 1, 14-annular fixing seat, 15-annular Connecting seat, 16-driven tooth, 17-blocking mechanism, 171-movable wing one, 172-fixing rod, 173-blocking component, 174-mounting rod two, 175-movable wing two, 176-reset spring, 177-movable sleeve, 178-perforation two, 179-perforation three, 18-driving gear, 19-driven gear, 20-diversion wing, 21-transmission gear, 22-extension protrusion, 23-diversion protrusion. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0028] In one embodiment, referring to Figures 1 to 8, an oily wastewater treatment device, comprising a treatment shell 1, a water inlet pipe 2 is arranged on the top of the treatment shell 1, a premixing tank 6 is movably arranged inside the treatment shell 1, a driving motor 3 is arranged on the top of the treatment shell 1, and is used to drive the premixing tank 6 to rotate horizontally; a feeding mechanism 8 is arranged at the bottom of the premixing tank 6, and is used to feed demulsified liquid into the premixing tank 6, and the feeding mechanism 8 includes a demulsified feeding pipe 83 extending to the bottom of the premixing tank 6; a blocking mechanism 17 is arranged on the inner wall of the bottom of the premixing tank 6, and the blocking mechanism 17 includes a fixed rod 172 installed on the inner wall of the bottom of the premixing tank 6 through a mounting rod 174, and a movable sleeve 177 is sleeved on the fixed rod 172, and a side wall of the movable sleeve 177 is provided with a movable side wing 171, and the movable side wing 171 is opened near the demulsified feeding pipe 83 A blocking component 173 is provided on one side of the opening, and the side of the movable side wing 171 is connected to the inner wall of the premixing tank 6 through a reset spring 176; the other side wall of the movable sleeve 177 is provided with a movable side wing 2 175, and the side position of the movable side wing 2 175 corresponds to the opening position of the water inlet pipe 2; a stirring mechanism 7 is provided inside the premixing tank 6 for stirring the sewage and demulsifier in the premixing tank 6; an extension protrusion 22 is provided on the top of the circumferential outer wall of the premixing tank 6 for mixing the sewage and demulsifier flowing downward along the outer wall of the premixing tank 6; the circumferential outer wall of the premixing tank 6 is provided with diversion protrusions 23 arranged at intervals, the diversion protrusions 23 are inclined, and the diversion protrusions 23 are located at the bottom of the extension protrusions 22, which are used to divert the sewage flowing downstream between the treatment shell 1 and the premixing tank 6.

[0029] When in use, the sewage to be treated is injected into the premixing tank 6 through the water inlet pipe 2. With the injection of sewage in the water inlet pipe 2, the movable side wing 2 175 flips downward under the impact of the sewage. At this time, the movable sleeve 177 rotates relative to the fixed rod 172, that is, it drives the movable side wing 171 to flip upward relative to the fixed rod 172. At this time, the blocking component 173 is removed from the opening of the demulsification feeding pipe 83, and the demulsification feeding pipe 83 injects demulsification liquid into the premixing tank 6. The demulsification liquid injected by the demulsification feeding pipe 83 impacts and mixes with the sewage injected by the water inlet pipe 2. The stirring mechanism 7 stirs and mixes the sewage and the demulsification liquid in the premixing tank 6. With the continuous injection of sewage, the sewage overflows from the top of the premixing tank 6 to the outside of the premixing tank 6. At this time, the sewage flows downward between the outer wall of the premixing tank 6 and the inner wall of the treatment shell 1, and the driving motor 3 drives the premixing tank 6 horizontally. The extended protrusion 22 further stirs and mixes the sewage and demulsified liquid flowing downward from the outer wall of the premixing tank 6, and the diversion protrusion 23 diverts the mixed sewage so that the sewage flows downward between two adjacent diversion protrusions 23, thereby realizing the diversion of sewage. In addition, the inclined diversion protrusion 23 can drive the sewage to rotate and flow downward along the outer wall of the premixing tank 6 during the rotation of the premixing tank 6. In the process of the sewage rotating and flowing downward, the water and oil in the sewage are initially separated under the action of centrifugal force, and the initially separated sewage flows to the bottom of the treatment shell 1 and is further separated by standing, thereby improving the water-oil separation efficiency of the oily sewage. When the water inlet pipe 2 stops injecting sewage, the movable side wing 171 is reset under the elastic action of the reset spring 176. At this time, the blocking component 173 blocks the opening of the demulsified feeding pipe 83, and the feeding of the demulsified liquid is automatically stopped.

[0030] As a preferred embodiment of the present invention, one end of the extension protrusion 22 away from the premixing tank 6 abuts against the inner wall of the processing shell 1, and one end of the guide protrusion 23 away from the premixing tank 6 abuts against the inner wall of the processing shell 1; the inclination direction of the guide protrusion 23 is consistent with the rotation direction of the premixing tank 6.

[0031] As a preferred embodiment of the present invention, a partition plate 10, a partition plate 2 9 and a partition plate 3 11 are concentrically arranged on the bottom inner wall of the processing shell 1, the partition plate 2 9 and the partition plate 3 11 are located inside the partition plate 10, and the partition plate 3 11 is located inside the partition plate 2 9. An oil outlet pipe 4 and a water outlet pipe 5 are arranged at the bottom of the processing shell 1, one end of the oil outlet pipe 4 is located inside the partition plate 3 11, and one end of the water outlet pipe 5 is located between the partition plate 3 11 and the partition plate 2 9.

[0032] As a preferred embodiment of the present invention, a perforation 13 is provided at the bottom of the circumference of the partition plate 2 9 , the opening position of the perforation 13 is higher than the opening position of the outlet pipe 5 in the treatment shell 1 , and the height of the partition plate 2 9 is higher than that of the partition plate 1 10 and the partition plate 3 11 .

[0033] As a preferred embodiment of the present invention, the circumferential outer wall of the premixing tank 6 is provided with an annularly arranged guide wing 20, and the guide wing 20 is located at the bottom of the guide protrusion 23. A gap is left between the guide wing 20 and the inner wall of the treatment shell 1 on the side away from the premixing tank 6. The guide wing 20 guides the sewage flowing through the guide protrusion 23, so that the sewage can flow downward along the inner wall of the treatment shell 1 to the bottom of the treatment shell 1. The partition plate 10 separates the sewage flowing down along the inner wall of the treatment shell 1 to prevent the shaking caused by the continuous downward flow of the sewage from being transmitted to the liquid in the partition plate 2 9 and the partition plate 3 11. The sewage outside the partition plate 10 overflows from the top of the partition plate 10 to between the partition plate 10 and the partition plate 2 9. , and then flows from the opening of the perforation 13 to between the partition plate 2 9 and the partition plate 3 11. In the process of sewage flowing from the outside of the partition plate 10 to the inside of the partition plate 2 9, the water and oil are statically stratified, and the oil separated at the liquid surface between the partition plate 2 9 and the partition plate 3 11 overflows from the top of the partition plate 3 11 to the inside of the partition plate 3 11. The oil in the partition plate 3 11 can be discharged through the oil outlet pipe 4, and the water at the bottom between the partition plate 2 9 and the partition plate 3 11 can be discharged through the water outlet pipe 5. The opening position of the perforation 13 is higher than the opening position of one end of the water outlet pipe 5 located in the treatment shell 1, which can avoid the situation where the oily sewage that flows into the inside of the partition plate 2 9 through the perforation 13 and is not fully statically stratified is directly discharged from the water outlet pipe 5.

[0034] As a preferred embodiment of the present invention, an annular fixing seat 14 is installed on the top inner wall of the processing shell 1, and the bottom movable sleeve of the annular fixing seat 14 is provided with an annular connecting seat 15, and the bottom of the annular connecting seat 15 is connected to the premixing tank 6 through a mounting rod 12.

[0035] As a preferred embodiment of the present invention, the circumferential inner wall of the annular connecting seat 15 is provided with annularly distributed driven teeth 16, the output end of the drive motor 3 is provided with a drive gear 18, the circumference of the drive gear 18 is meshed with the driven teeth 16, the drive motor 3 drives the drive gear 18 to rotate, and the engagement of the drive gear 18 and the driven teeth 16 drives the annular connecting seat 15 and the premixing tank 6 to rotate horizontally; the stirring mechanism 7 includes a rotating shaft 72 movably mounted on the inner wall of the top of the processing shell 1, and the rotating shaft 72 extends to the premixing tank 6 A stirring component 71 is provided at one end of the interior, and a driven gear 19 is provided on the rotating shaft 72. A transmission gear 21 is movably installed on the top inner wall of the processing shell 1, and the circumference of the transmission gear 21 is meshed with the circumference of the driven gear 19 and the driven tooth 16. When the driving motor 3 drives the annular connecting seat 15 to rotate through the driving gear 18, the meshing transmission of the transmission gear 21 drives the driven gear 19 and the rotating shaft 72 to rotate, thereby driving the stirring component 71 to stir and mix the sewage and demulsified liquid in the premixing tank 6.

[0036] As a preferred embodiment of the present invention, a second perforation 178 is provided on the side of the movable wing 171. When the blocking component 173 is moved away from the opening of the demulsification feeding pipe 83, the demulsification liquid sprayed from the opening of the demulsification feeding pipe 83 impacts the side of the movable wing 171. At this time, the second perforation 178 disperses the demulsification liquid, thereby improving the dispersion and mixing efficiency of the demulsification liquid; the movable wing 2 175 is provided with a third perforation 179 on the side close to the movable sleeve 177, so that part of the sewage impacting the side of the movable wing 2 175 close to the movable sleeve 177 can flow through the third perforation 179 to the bottom of the movable wing 2 175, thereby increasing the turbulence effect of the water flow around the movable wing 2 175 and the movable wing 1 171, thereby improving the mixing efficiency of the sewage and the demulsification liquid.

[0037] As a preferred embodiment of the present invention, the feeding mechanism 8 includes a transition shell 81 arranged on the outer wall of the bottom of the premixing tank 6, the transition shell 81 is an annular structure, and one end of the demulsification feeding pipe 83 extending to the outside of the premixing tank 6 is located inside the transition shell 81. The outer wall of the transition shell 81 is connected to the inner wall of the processing shell 1 through a connecting rod, and a delivery pipe 82 is provided on one side of the transition shell 81 for injecting demulsification liquid into the transition shell 81. When in use, the premixing tank 6 is horizontally rotated relative to the transition shell 81, and the demulsification liquid is injected into the transition shell 81 through the delivery pipe 82. When the blocking component 173 is removed from the opening of the demulsification feeding pipe 83, the demulsification liquid in the transition shell 81 flows into the premixing tank 6 through the demulsification feeding pipe 83 to realize the feeding of the demulsification liquid.

[0038] The above-mentioned treatment process of the oily wastewater treatment device includes the following steps: when in use, the wastewater to be treated is injected into the premixing tank 6 through the water inlet pipe 2. As the wastewater in the water inlet pipe 2 is injected, the movable side wing 2 175 is turned downward under the impact of the wastewater. At this time, the movable sleeve 177 rotates relative to the fixed rod 172, that is, the movable side wing 171 is driven to turn upward relative to the fixed rod 172. At this time, the blocking component 173 is removed from the opening of the demulsification feeding pipe 83, and the demulsification feeding pipe 83 injects demulsification liquid into the premixing tank 6. The demulsification liquid injected by the demulsification feeding pipe 83 impacts and mixes with the wastewater injected by the water inlet pipe 2, and the stirring mechanism 7 is used to mix the wastewater and the demulsification liquid in the premixing tank 6. The sewage is stirred and mixed. With the continuous injection of sewage, the sewage overflows from the top of the premixing tank 6 to the outside of the premixing tank 6. At this time, the sewage flows downward from the outer wall of the premixing tank 6 and the inner wall of the treatment shell 1. At the same time, the driving motor 3 drives the premixing tank 6 to rotate horizontally, and the extending protrusion 22 further stirs and mixes the sewage and demulsified liquid flowing downward from the outer wall of the premixing tank 6. The diversion protrusion 23 diverts the mixed sewage, and the sewage flows downward between two adjacent diversion protrusions 23; when the water inlet pipe 2 stops injecting sewage, the movable side wing 171 is reset under the elastic action of the reset spring 176. At this time, the blocking component 173 blocks the opening of the demulsified feeding pipe 83 to stop the feeding of the demulsified liquid.

[0039] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An oily wastewater treatment device, comprising a treatment shell (1), wherein a water inlet pipe (2) is arranged on the top of the treatment shell (1), characterized in that: A premixing tank (6) is movably arranged inside the processing housing (1), and a driving motor (3) is arranged on the top of the processing housing (1) for driving the premixing tank (6) to rotate horizontally; A feeding mechanism (8) is provided at the bottom of the premixing tank (6) for feeding demulsified liquid into the premixing tank (6), wherein the feeding mechanism (8) comprises a demulsified liquid feeding pipe (83) extending to the bottom of the premixing tank (6); The bottom inner wall of the premixing tank (6) is provided with a plugging mechanism (17), the plugging mechanism (17) comprising a fixed rod (172) mounted on the bottom inner wall of the premixing tank (6) via a second mounting rod (174), a movable sleeve (177) sleeved on the fixed rod (172), a side wall of the movable sleeve (177) being provided with a movable side wing (171), a side of the movable side wing (171) close to the opening of the demulsification feeding pipe (83) being provided with a plugging component (173), and a side surface of the movable side wing (171) being connected to the inner wall of the premixing tank (6) via a return spring (176); The other side wall of the movable sleeve (177) is provided with a second movable side wing (175), and the side position of the second movable side wing (175) corresponds to the opening position of the water inlet pipe (2); The premixing tank (6) is provided with a stirring mechanism (7) for stirring the sewage and demulsified liquid in the premixing tank (6); An extension protrusion (22) is provided on the top of the circumferential outer wall of the premixing tank (6) for mixing the sewage and the demulsified liquid flowing downward along the outer wall of the premixing tank (6); The circumferential outer wall of the premixing tank (6) is provided with diversion protrusions (23) arranged at intervals. The diversion protrusions (23) are arranged obliquely. The diversion protrusions (23) are located at the bottom of the extension protrusion (22) and are used to divert sewage flowing down between the treatment shell (1) and the premixing tank (6). The side surface of the movable side wing (171) is provided with a second perforation (178); and the side of the movable side wing (175) close to the movable sleeve (177) is provided with a third perforation (179).

2. The oily wastewater treatment device according to claim 1 is characterized in that: An end of the extending protrusion (22) away from the premixing tank (6) abuts against the inner wall of the processing shell (1), and an end of the guiding protrusion (23) away from the premixing tank (6) abuts against the inner wall of the processing shell (1); The inclination direction of the flow-guiding protrusion (23) is consistent with the rotation direction of the premixing tank (6).

3. The oily wastewater treatment device according to claim 2 is characterized in that: The bottom inner wall of the processing shell (1) is concentrically provided with a partition plate 1 (10), a partition plate 2 (9) and a partition plate 3 (11); the partition plate 2 (9) and the partition plate 3 (11) are located inside the partition plate 1 (10); the partition plate 3 (11) is located inside the partition plate 2 (9); the bottom of the processing shell (1) is provided with an oil outlet pipe (4) and a water outlet pipe (5); one end of the oil outlet pipe (4) is located inside the partition plate 3 (11); one end of the water outlet pipe (5) is located between the partition plate 3 (11) and the partition plate 2 (9).

4. The oily wastewater treatment device according to claim 3 is characterized in that: The bottom of the circumference of the second partition plate (9) is provided with a first perforation (13), the opening position of the first perforation (13) being higher than the opening position of the water outlet pipe (5) in the treatment housing (1), and the height of the second partition plate (9) being higher than the first partition plate (10) and the third partition plate (11).

5. The oily wastewater treatment device according to claim 4, characterized in that: The circumferential outer wall of the premixing tank (6) is provided with an annularly arranged flow-guiding wing (20), the flow-guiding wing (20) being located at the bottom of the flow-guiding protrusion (23), and a gap being left between the side of the flow-guiding wing (20) away from the premixing tank (6) and the inner wall of the processing shell (1).

6. The oily wastewater treatment device according to claim 1, characterized in that: An annular fixing seat (14) is installed on the top inner wall of the processing shell (1), and an annular connecting seat (15) is provided on the bottom movable sleeve of the annular fixing seat (14), and the bottom of the annular connecting seat (15) is connected to the premixing tank (6) via a mounting rod (12).

7. The oily wastewater treatment device according to claim 6, characterized in that: The circumferential inner wall of the annular connecting seat (15) is provided with annularly distributed driven teeth (16), and the output end of the driving motor (3) is provided with a driving gear (18), and the circumference of the driving gear (18) is meshed with the driven teeth (16); The stirring mechanism (7) comprises a rotating shaft (72) movably mounted on the top inner wall of the processing shell (1); one end of the rotating shaft (72) extending into the interior of the premixing tank (6) is provided with a stirring component (71); a driven gear (19) is provided on the rotating shaft (72); a transmission gear (21) is movably mounted on the top inner wall of the processing shell (1); the circumference of the transmission gear (21) meshes with the circumference of the driven gear (19) and the driven teeth (16).

8. The oily wastewater treatment device according to claim 1, characterized in that: The feeding mechanism (8) comprises a transition shell (81) arranged on the outer wall of the bottom of the premixing tank (6); the transition shell (81) is an annular structure; one end of the demulsification feeding pipe (83) extending to the outside of the premixing tank (6) is located inside the transition shell (81); the outer wall of the transition shell (81) is connected to the inner wall of the processing shell (1) via a connecting rod; and a delivery pipe (82) is arranged on one side of the transition shell (81) for injecting demulsification liquid into the transition shell (81).

9. The treatment process of an oily wastewater treatment device according to any one of claims 1 to 8, characterized in that: The method comprises the following steps: when in use, sewage to be treated is injected into the premixing tank (6) through the water inlet pipe (2); as the sewage is injected into the water inlet pipe (2), the movable side wing (2) turns downward under the impact of the sewage; at this time, the movable sleeve (177) rotates relative to the fixed rod (172), thereby driving the movable side wing (171) to turn upward relative to the fixed rod (172); at this time, the blocking component (173) is moved away from the opening of the demulsification feeding pipe (83); the demulsification feeding pipe (83) injects demulsification liquid into the premixing tank (6); the demulsification liquid injected from the demulsification feeding pipe (83) impacts and mixes with the sewage injected from the water inlet pipe (2); the stirring mechanism (7) stirs and mixes the sewage and the demulsification liquid in the premixing tank (6); as the sewage is injected into the premixing tank (6), the demulsification liquid is stirred and mixed by the stirring mechanism (7); With the continuous injection of water, the sewage overflows from the top of the premixing tank (6) to the outside of the premixing tank (6), and the sewage flows downward from the outer wall of the premixing tank (6) and the inner wall of the treatment shell (1). At the same time, the driving motor (3) drives the premixing tank (6) to rotate horizontally, and the extension protrusion (22) further stirs and mixes the sewage and demulsified liquid flowing downward from the outer wall of the premixing tank (6). The diversion protrusion (23) diverts the mixed sewage, and the sewage flows downward between two adjacent diversion protrusions (23). When the water inlet pipe (2) stops injecting sewage, the movable side wing (171) is reset under the elastic action of the reset spring (176), and the blocking component (173) blocks the opening of the demulsified liquid feeding pipe (83), and the feeding of the demulsified liquid is stopped.

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