A petrochemical wastewater treatment device

Abstract

The present invention relates to the technical field of sewage treatment, specifically to a petrochemical sewage treatment device, comprising an outer tank and an inner tank fixedly installed inside the outer tank, a hydrocyclone separation mechanism is fixedly installed at a position near the top of the inner wall of the inner tank, a suspension component is provided at the center of the hydrocyclone separation mechanism for circumferential rotation or axial sliding, a first discharge pipe for discharging floating oil and scum is fixedly provided at the center of the suspension component of the hydrocyclone separation mechanism, and a plurality of floating components are hinged at the top of the suspension component. The beneficial effect of the present invention is that by providing a suspension component, a floating component and a guide component, the floating component can be used to effectively collect and discharge floating scum and floating oil on the surface of sewage, which helps to reduce the influence of floating scum and floating oil on the water quality of the hydrocyclone separation mechanism, thereby improving the separation efficiency of the entire device, ensuring that floating scum and floating oil can be effectively collected under any circumstances, and avoiding a large amount of water accompanying the discharge of floating scum and floating oil.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, in particular to a petrochemical sewage treatment device. Background Art

[0002] In the field of petrochemicals, sewage treatment plants usually include a variety of technologies and equipment to ensure that wastewater meets environmental standards and is effectively reused. The most commonly used sewage treatment plant is a tank-in-tank separation device.

[0003] The tank-in-tank is an oil drainage device that uses hydraulic cyclone separation and automatic collection of floating oil. The tank-in-tank technology integrates sewage conditioning, homogenization and oil-water cyclone, and separates oil, water and sludge into three phases under the action of centrifugal force.

[0004] A tank-in-tank disclosed in Chinese patent publication number CN207468254U enters a cyclone separator through a liquid inlet pipe, and oily wastewater undergoes cyclone separation in the cyclone separator. The density difference between oil and water is used to generate a centrifugal field, and the oil, water and sludge are separated into three phases under the action of centrifugal force.

[0005] However, compared with the existing technologies in related fields, firstly, the existing hydraulic cyclone separation structure is often unable to accurately control the separation of scum and water during the scum discharge process, resulting in a large amount of water being discharged, which not only reduces the separation efficiency, but also increases the burden of subsequent processing procedures; secondly, the influence of water level fluctuations. Due to the water level fluctuations inside the cyclone separator, the traditional fixed scum scraping device cannot adapt to the water level changes, resulting in unstable scraping effect and may even cause secondary pollution of scum; thirdly, the traditional cyclone separator lacks an automated control system and cannot realize the function of automatically adjusting the scraping device according to the water level changes, thereby affecting the overall performance and ease of operation of the equipment. Summary of the invention

[0006] The purpose of the present invention is to overcome the shortcomings of the prior art, solve the problems mentioned in the background technology, and provide a petrochemical wastewater treatment device.

[0007] The object of the present invention is achieved through the following technical scheme: a petrochemical wastewater treatment device, comprising an outer tank and an inner tank fixedly installed inside the outer tank, a hydrocyclone separation mechanism is fixedly installed on the inner wall of the inner tank near the top, a suspension component is provided at the center of the hydrocyclone separation mechanism for circumferential rotation or axial sliding, a first discharge pipe for discharging floating oil and scum is fixedly provided at the center of the suspension component of the hydrocyclone separation mechanism, a plurality of floating components are hinged on the top of the suspension component, the buoyancy and vortex of the sewage are used to cooperate with the floating component to make the floating component rotate circumferentially or slide axially, the floating component is used to collect floating oil and scum on the upper layer of the sewage, a top cover is fixedly installed on the top of the hydrocyclone separation mechanism, a guide component is provided at the center of the bottom of the top cover for sliding, the guide component slides axially with the suspension component, and when the floating component rotates circumferentially with the suspension component, the guide component is used to control the floating component to tilt, so that the floating component discharges the floating oil and scum inside it into the first discharge pipe.

[0008] Furthermore, the suspension assembly includes a rotating cylinder which is circumferentially or axially slidably arranged at the center of the hydrocyclone separation mechanism, and a plurality of first notches are provided on the outer surface of the rotating cylinder, and the first notches are used to allow sewage and sludge to be discharged into the inner tank.

[0009] Furthermore, the floating assembly includes a floating tube hinged to the rotating cylinder through an elastic member shaft, a second slot is provided on the floating tube, the second slot is provided on the side opposite to the rotation direction of the floating tube, a partition is fixedly provided on the side of the floating tube close to the second slot, a plurality of drainage ports are provided on the partition, baffles are slidably provided at the positions of the plurality of drainage ports, and a drainage groove is provided at the bottom of the floating tube located on the outside of the rotating cylinder.

[0010] Furthermore, the shape of the floating tube is L-shaped, and the cross section of the bottom of the floating tube is an isosceles trapezoid.

[0011] Furthermore, the guide assembly includes a slider that slides with the top cover, a connecting disk is fixedly provided at the center of the bottom of the slider, a track is fixedly installed on one side of the outer surface of the connecting disk through a connecting rod, and the shape of the track is arc-shaped, and a guide shaft that matches the track is fixedly provided at one end of the floating tube away from the rotating drum. When the guide shaft at the end of the floating tube enters the track, the track prompts the guide shaft to drive the floating tube to tilt upward with the elastic member rotating shaft as the axis. When the guide shaft at the end of the floating tube leaves the track, the elastic member rotating shaft is used to restore the floating tube to a downward tilted state.

[0012] Furthermore, a plurality of support rods are fixedly provided on the top of the rotating cylinder, and the plurality of support rods are rotatably connected to the connecting disk via bearings.

[0013] Furthermore, the positions of the partitions corresponding to the multiple baffles are all provided with receiving grooves and slots, and the baffles are slidably arranged inside the receiving grooves. When the floating tube is tilted upward with the elastic member rotation axis as the axis, gravity is used to make the baffle slide out from the inside of the receiving groove and insert into the slot, thereby utilizing the cooperation between the baffle and the slot to close the drainage port. When the floating tube is tilted downward with the elastic member rotation axis as the axis, gravity is used to separate the baffle from the slot and slide into the inside of the receiving groove.

[0014] Furthermore, movable grooves are provided at positions of the rotating drum corresponding to the plurality of floating tubes, and the bottom surface of the movable groove is a conical surface. By utilizing the provided conical surface, the upwardly tilted or downwardly inclined surface of the floating tube can fit with the bottom surface of the movable groove.

[0015] Furthermore, the shape of the slider is rectangular, and a slide groove matching with the slider is provided at a position of the top cover corresponding to the slider.

[0016] Furthermore, a sewage discharge pipe is fixedly provided near the bottom of the inner tank, a sediment discharge pipe is fixedly provided at the center of the bottom of the inner tank, a sewage discharge pipe is provided on the hydrocyclone separation mechanism, the sewage discharge pipe, the first discharge pipe, the sewage discharge pipe and the sediment discharge pipe all pass through the outer tank and extend to the outside thereof, an air dissolving mechanism for generating bubbles inside the hydrocyclone separation mechanism is provided inside the outer tank, and a vent pipe is fixedly provided on the top of the outer tank.

[0017] The beneficial effects of the present invention are as follows: by arranging a suspension component, a floating component and a guide component, the floating component can be used to effectively collect and discharge scum and floating oil on the surface of sewage, which helps to reduce the influence of scum and floating oil on the water quality of the hydrocyclone separation mechanism, thereby improving the separation efficiency of the entire device; since the floating component can float up and down according to the water level, it can automatically adjust the working position under different water level conditions, ensuring that scum and floating oil can be effectively collected under any circumstances, and avoiding a large amount of water accompanying the discharge of scum and floating oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 It is a cross-sectional view of the outer tank and the inner tank of the present invention;

[0020] Figure 2 It is a schematic diagram of the structure of the top cover of the present invention;

[0021] Figure 3It is a structural schematic diagram of the top of the hydrocyclone separation mechanism of the present invention;

[0022] Figure 4 It is a schematic structural diagram of the bottom of the hydrocyclone separation mechanism of the present invention;

[0023] Figure 5 For the present invention Figure 4 A schematic diagram of the structure enlargement at the center A;

[0024] Figure 6 This is a schematic diagram of the state when the floating tube of the present invention is tilted upward;

[0025] Figure 7 It is a structural schematic diagram of the movable slot of the present invention;

[0026] Figure 8 It is a schematic diagram of the state when the baffle plate of the present invention is matched with the slot;

[0027] Fig. 9 It is a schematic diagram of the state when the baffle of the present invention is stored in the receiving groove;

[0028] Fig.10 It is a structural schematic diagram of the guide assembly of the present invention;

[0029] Fig.11 is a cross-sectional view of the floating tube of the present invention;

[0030] Fig.12 For the present invention Fig.11 A magnified schematic diagram of the structure at point B in the middle.

[0031] In the figure: 1. outer tank; 101. air dissolving mechanism; 102. venting pipe; 2. inner tank; 201. sewage discharge pipe; 202. sediment discharge pipe; 3. hydrocyclone separation mechanism; 301. sewage discharge pipe; 4. suspension assembly; 401. rotating cylinder; 402. first notch; 4011. support rod; 4012. movable groove; 5. first discharge pipe; 6. floating assembly; 601. floating tube; 6011. guide shaft; 602. second notch; 603. partition; 6031. receiving groove; 6032. slot; 604. drain outlet; 605. baffle; 606. drain groove; 7. top cover; 8. guide assembly; 801. slider; 802. connecting plate; 8021. bearing; 8022. connecting rod; 803. track; 9. elastic member shaft. DETAILED DESCRIPTION

[0032] 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.

[0033] Additional aspects and advantages of the present invention will be further given in the following description in conjunction with the accompanying drawings, and in part will become apparent from the following description, or may be learned through practice of the present invention.

[0034] An embodiment of a petrochemical wastewater treatment device of the present invention is as follows Figures 1 to 12 As shown, it includes an outer tank 1 and an inner tank 2 fixedly installed inside the outer tank 1, a hydrocyclone separation mechanism 3 is fixedly installed on the inner wall of the inner tank 2 near the top, a suspension component 4 is provided at the center of the hydrocyclone separation mechanism 3 for circumferential rotation or axial sliding, a first discharge pipe 5 for discharging floating oil and scum is fixedly provided at the center of the suspension component 4 of the hydrocyclone separation mechanism 3, a plurality of floating components 6 are hinged on the top of the suspension component 4, and the buoyancy and vortex of the sewage are used to cooperate with the floating components 6 to make the suspension components 4 rotate circumferentially or slide axially, and the floating components 6 are used to collect floating oil and scum on the upper layer of the sewage, a top cover 7 is fixedly installed on the top of the hydrocyclone separation mechanism 3, a guide component 8 is provided at the center of the bottom of the top cover 7 for sliding, and the guide component 8 slides axially with the suspension component 4, and when the floating component 6 rotates circumferentially with the suspension component 4, the guide component 8 is used to control the floating component 6 to tilt, so that the floating component 6 discharges the floating oil and scum inside it into the first discharge pipe 5.

[0035] like Figure 1 and Figure 7 As shown, the suspension assembly 4 includes a rotating cylinder 401 which is circumferentially rotated or axially slidably arranged at the center of the hydrocyclone separation mechanism 3. The outer surface of the rotating cylinder 401 is provided with a plurality of first notches 402. The first notches 402 are used to allow sewage and sludge to be discharged into the inner tank 2. When sewage flows into the hydrocyclone separation mechanism 3 from the sewage discharge pipe 301, the hydrocyclone separation mechanism 3 will cause the sewage to form a vortex, allowing floating objects and oil to float on the water surface, and the separated sewage will flow into the inner tank 2 through the plurality of first notches 402.

[0036] like Figure 7 and Fig.11As shown, the floating assembly 6 includes a floating tube 601 hinged to the rotating drum 401 through an elastic member shaft 9, a second notch 602 is provided on the floating tube 601, and the second notch 602 is provided on a side opposite to the rotation direction of the floating tube 601, a partition 603 is fixedly provided on the side of the floating tube 601 close to the second notch 602, a plurality of drainage ports 604 are provided on the partition 603, and baffles 605 are slidably provided at the positions of the plurality of drainage ports 604 of the partition 603, a drainage groove 606 is provided at the bottom of the floating tube 601 located on the outside of the rotating drum 401, and the buoyancy of the sewage cooperates with the floating assembly 6, so that the rotating drum 401 slides axially according to the water level surface, when the water level is high, the rotating drum 401 slides upward, and when the water level is low, the rotating drum 401 slides downward, and the floating assembly 6 cooperates with the swirling sewage to make the rotating drum 401 and the plurality of floating assemblies 6 rotate circumferentially.

[0037] like Figures 8 to 12 As shown, the shape of the floating tube 601 is L-shaped, and the cross-section of the bottom of the floating tube 601 is an isosceles trapezoid, so as to improve the stability of the floating tube 601 when floating. The rotating drum 401 is provided with movable grooves 4012 at positions corresponding to the multiple floating tubes 601. The bottom surface of the movable groove 4012 is a conical surface. By using the set conical surface, the upwardly tilted or downwardly tilted surface of the floating tube 601 can be fitted with the bottom surface of the movable groove 4012. The partition 603 is provided with a receiving groove 6031 and a slot 6032 at positions corresponding to the multiple baffles 605. The baffle 605 is slidably arranged inside the receiving groove 6031. When the floating tube 601 is tilted upward with the elastic member rotating shaft 9 as the axis, When the floating tube 601 is lifted up, gravity is used to make the baffle 605 slide out from the inside of the receiving groove 6031 and insert into the inside of the slot 6032, so that the baffle 605 and the slot 6032 are matched to close the drain port 604. When the floating tube 601 is tilted downward with the elastic member shaft 9 as the axis, gravity is used to make the baffle 605 separate from the slot 6032 and slide into the inside of the receiving groove 6031. Through the provided partition 603 and drain port 604, when the rotating cylinder 401 and the multiple floating components 6 rotate, the water content inside the floating objects and the oil can be reduced again, so that the sewage retained in the floating objects and the oil can be discharged from the drain port 604 and the drain groove 606.

[0038] like Figure 6 , Fig.10 and Fig.11As shown, the guide assembly 8 includes a slider 801 that slidably cooperates with the top cover 7. The slider 801 is in a rectangular shape. A sliding groove that matches the slider 801 is provided at a position of the top cover 7 corresponding to the slider 801. A connecting plate 802 is fixedly provided at the center of the bottom of the slider 801. The connecting plate 802 can only slide axially by utilizing the cooperation between the slider 801 and the sliding groove. A track 803 is fixedly installed on one side of the outer surface of the connecting plate 802 through a connecting rod 8022. The track 803 is in an arc shape. A guide shaft 6011 that matches the track 803 is fixedly provided at one end of the floating tube 601 away from the rotating drum 401. When the guide shaft 6011 at the end of the floating tube 601 enters the track 803, the track 803 prompts the guide shaft 6011 to drive the floating tube 601 to tilt upward with the elastic member rotating shaft 9 as the axis. When the guide shaft 6011 at the end of the floating tube 601 is separated from the track 803, the elastic member rotating shaft 9 is utilized to restore the floating tube 601 to a downwardly inclined state. Figure 7 and Fig.10 As shown, a plurality of support rods 4011 are fixedly arranged at the top of the rotating drum 401, and the plurality of support rods 4011 are rotatably connected to the connecting plate 802 through bearings 8021. By utilizing the provided bearings 8021, when the plurality of support rods 4011 rotate with the rotating drum 401, the connecting plate 802 will not rotate with it. At the same time, when the rotating drum 401 drives the plurality of support rods 4011 to slide axially, the connecting plate 802 will drive the connecting rod 8022 and the track 803 to slide axially, so that no matter how the rotating drum 401 and the floating tube 601 rotate, the connecting rod 8022 and the floating tube 601 rotate. When the guide shaft 6011 at the end of a floating tube 601 enters the track 803, the track 803 prompts the guide shaft 6011 to drive the floating tube 601 to tilt upward with the elastic member rotating shaft 9 as the axis. When the floating tube 601 tilts upward with the elastic member rotating shaft 9 as the axis, the baffle 605 is caused to slide out of the receiving groove 6031 and inserted into the slot 6032 by gravity, so that the floating tube 601 discharges the separated floating objects and oil into the first discharge pipe 5.

[0039] like Figure 1As shown, a sewage discharge pipe 201 is fixedly provided near the bottom of the inner tank 2, a sediment discharge pipe 202 is fixedly provided at the center of the bottom of the inner tank 2, a sewage discharge pipe 301 is provided on the hydrocyclone separation mechanism 3, the sewage discharge pipe 301, the first discharge pipe 5, the sewage discharge pipe 201 and the sediment discharge pipe 202 all penetrate the outer tank 1 and extend to the outside thereof, an air dissolving mechanism 101 is provided inside the outer tank 1 for generating bubbles inside the hydrocyclone separation mechanism 3, an emptying pipe 102 is fixedly provided on the top of the outer tank 1, and sewage containing only sludge will be precipitated after flowing into the inner tank 2, at which time the clean water after precipitation can be discharged from the sewage discharge pipe 201, and the precipitated sludge can be discharged from the sediment discharge pipe 202, and the small bubbles generated by the air dissolving mechanism 101 can improve the floating effect of floating objects and oil.

[0040] The outer tank 1, the inner tank 2, the hydrocyclone separation mechanism 3 and the gas dissolving mechanism 101 described in the present application are well-known technologies in the technical field, so their specific structures and working principles are not described in detail.

[0041] In summary, the effects of the present invention are as follows:

[0042] Improve separation efficiency: The floating assembly 6 can effectively collect and discharge the scum and floating oil on the surface of the sewage, which helps to reduce the influence of the scum and floating oil on the water quality of the hydrocyclone separation mechanism 3, thereby improving the separation efficiency of the entire device;

[0043] Automatic adjustment function: Since the floating component 6 can float up and down according to the water level, it can automatically adjust the working position under different water level conditions to ensure that the floating scum and floating oil can be effectively collected under any circumstances, and avoid the floating scum and floating oil being accompanied by a large amount of water when being discharged;

[0044] Improve water quality: The floating component 6 can remove the floating scum and floating oil in time to prevent the floating scum and floating oil from re-entering the mainstream of sewage, which helps to improve the quality of the final treated water.

[0045] The working process is as follows:

[0046] S1, such as Figures 1 to 3 As shown, when sewage flows into the hydrocyclone separation mechanism 3 from the sewage discharge pipe 301, the hydrocyclone separation mechanism 3 will cause the sewage to form a cyclone, and then cooperate with the small bubbles generated by the air dissolving mechanism 101 to make floating objects and oil float on the water surface;

[0047] S2, such as Figures 3 to 11As shown, the buoyancy of the sewage cooperates with the floating assembly 6, so that the rotating drum 401 slides axially according to the water level. When the water level is high, the rotating drum 401 slides upward, and when the water level is low, the rotating drum 401 slides downward (by using the provided bearing 8021, when the multiple support rods 4011 rotate with the rotating drum 401, the connecting plate 802 will not rotate with it. At the same time, when the rotating drum 401 drives the multiple support rods 4011 to slide axially, the connecting plate 802 will drive the connecting rod 8022 and the track 803 to slide axially, so that no matter how the rotating drum 401 and the floating tube 601 slide, the guide shaft 601 and the track 803 can perfectly cooperate), and the floating assembly 6 cooperates with the swirling sewage, so that the rotating drum 401 and the multiple floating assemblies 6 rotate circumferentially (at this time, the elastic force of the elastic member shaft 9 is greater than the buoyancy of the sewage, so that the floating tube 601 is normally in a downward tilted state);

[0048] S3, such as Figure 1 , Figure 7 and Fig.11 As shown, when the rotating drum 401 and the plurality of floating assemblies 6 rotate, the second notches 602 of the floating tube 601 allow floating objects and oil to enter the floating tube 601, and at this time, the separated sewage will flow into the inner tank 2 through the plurality of first notches 402;

[0049] S4, such as Figure 7 , Figure 8 and Fig.11 As shown, by means of the provided partition 603 and the drain port 604, when the rotating drum 401 and the plurality of floating assemblies 6 rotate, the water content inside the floating objects and the oil can be reduced again, so that the sewage inside the floating objects and the oil can be discharged from the drain port 604 and the drain tank 606;

[0050] S5, such as Figures 6 to 12 As shown, when the guide shaft 6011 at the end of a floating tube 601 enters the track 803, the track 803 prompts the guide shaft 6011 to drive the floating tube 601 to tilt upward with the elastic member shaft 9 as the axis;

[0051] S6, such as Figures 5 to 12 As shown, when the floating tube 601 tilts upward with the elastic member shaft 9 as the axis, the baffle 605 slides out from the receiving groove 6031 and is inserted into the slot 6032 by gravity, so that the floating tube 601 discharges the separated floating objects and oil into the first discharge pipe 5;

[0052] S7, such as Figures 7 to 12 As shown, when the guide shaft 6011 at the end of the floating tube 601 is separated from the track 803, the elastic member rotating shaft 9 is used to restore the floating tube 601 to a downward tilted state;

[0053] S8, such as Figure 1 As shown, the sewage containing only sludge flows into the inner tank 2 and then settles. At this time, the clean water after sedimentation can be discharged from the sewage discharge pipe 201, and the precipitated sludge can be discharged from the sediment discharge pipe 202.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A petrochemical wastewater treatment device, characterized in that: The invention comprises an outer tank and an inner tank fixedly installed inside the outer tank, a hydrocyclone separation mechanism is fixedly installed on the inner wall of the inner tank near the top, a suspension component is provided at the center of the hydrocyclone separation mechanism for circumferential rotation or axial sliding, the suspension component comprises a rotating drum, a plurality of first notches are provided on the outer surface of the rotating drum for allowing sewage and sludge to be discharged into the inner tank; a first discharge pipe for discharging floating oil and floating scum is fixedly provided at the center of the suspension component of the hydrocyclone separation mechanism, a plurality of floating components are hingedly connected to the top of the suspension component, the buoyancy and vortex of the sewage are used to cooperate with the floating components so that the floating components rotate circumferentially or slide axially according to the water level surface, the floating component comprises a floating tube hingedly connected to the rotating drum through an elastic member rotating shaft, a second notch is provided on the floating tube, the second notch is provided on the side opposite to the rotation direction of the floating tube, a partition is fixedly provided on the side of the floating tube near the second notch, a plurality of drainage ports are provided on the partition, baffles are provided at the positions of the plurality of drainage ports for sliding, the floating tube is located at the rotating drum A drainage trough is provided at the bottom of the outer side; the floating assembly is used to collect floating oil and scum on the upper layer of the sewage, a top cover is fixedly installed on the top of the hydrocyclone separation mechanism, a guide assembly is slidably provided at the center of the bottom of the top cover, the guide assembly includes a slider slidably matched with the top cover, a connecting plate is fixedly provided at the center of the bottom of the slider, a track is fixedly installed on one side of the outer surface of the connecting plate through a connecting rod, the shape of the track is arc-shaped, a guide shaft matched with the track is fixedly provided at one end of the floating tube away from the rotating drum, the guide assembly slides axially with the suspension assembly, when the floating assembly rotates circumferentially with the suspension assembly so that when the guide shaft at the end of the floating tube enters the track, the track prompts the guide shaft to drive the floating tube to tilt upward with the elastic member rotating shaft as the axis, and the baffle uses gravity to close the drainage port, so that the floating assembly discharges the floating oil and scum inside it into the first discharge pipe, and when the guide shaft at the end of the floating tube is out of the track, the elastic force of the elastic member rotating shaft at this time is greater than the buoyancy of the sewage, so that the floating tube returns to a downward tilted state.

2. A petrochemical wastewater treatment device according to claim 1, characterized in that: The shape of the floating tube is L-shaped, and the cross section of the bottom of the floating tube is an isosceles trapezoid.

3. A petrochemical wastewater treatment device according to claim 1, characterized in that: A plurality of support rods are fixedly provided on the top end of the rotating cylinder, and the plurality of support rods are rotatably connected to the connecting disk via bearings.

4. A petrochemical wastewater treatment device according to claim 1, characterized in that: The positions of the partition corresponding to the multiple baffles are all provided with receiving grooves and slots, and the baffles are slidably arranged inside the receiving grooves. When the floating tube is tilted upward with the elastic member rotation axis as the axis, gravity is used to make the baffle slide out from the inside of the receiving groove and insert into the inside of the slot, so as to close the drainage port by the cooperation between the baffle and the slot. When the floating tube is tilted downward with the elastic member rotation axis as the axis, gravity is used to make the baffle separate from the slot and slide into the inside of the receiving groove.

5. A petrochemical wastewater treatment device according to claim 4, characterized in that: The rotating drum is provided with movable grooves at positions corresponding to the plurality of floating tubes, and the bottom surface of the movable groove is a conical surface. By utilizing the provided conical surface, the floating tubes can fit with the bottom surface of the movable groove whether tilted upward or downward.

6. A petrochemical wastewater treatment device according to claim 1, characterized in that: The sliding block is in a rectangular shape, and a sliding groove matching with the sliding block is provided at a position of the top cover corresponding to the sliding block.

7. A petrochemical wastewater treatment device according to claim 1, characterized in that: A sewage discharge pipe is fixedly provided near the bottom of the inner tank, a sediment discharge pipe is fixedly provided at the center of the bottom of the inner tank, a sewage discharge inlet pipe is provided on the hydrocyclone separation mechanism, the sewage discharge inlet pipe, the first discharge pipe, the sewage discharge pipe and the sediment discharge pipe all pass through the outer tank and extend to the outside thereof, an air dissolving mechanism for generating bubbles inside the hydrocyclone separation mechanism is provided inside the outer tank, and a vent pipe is fixedly provided on the top of the outer tank.

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