Petroleum drilling wastewater treatment device with backflushing function

Abstract

The invention discloses a petroleum drilling wastewater treatment device with a backflushing function, and belongs to the technical field of wastewater treatment.The petroleum drilling wastewater treatment device with the backflushing function comprises a temporary storage box, one side of the temporary storage box is fixedly connected with a connecting shell, the other end of the connecting shell is fixedly connected with a water inlet groove pipe, and the water inlet groove pipe is fixedly connected with a water outlet pipe; and two supporting assemblies are installed on the inner wall of the temporary storage box body, a filtering mechanism is rotationally connected between the two supporting assemblies, a cleaning mechanism is fixedly connected to the top of the connecting shell, and a driving mechanism is installed at the top of the cleaning mechanism. By designing the supporting assembly, the filtering mechanism, the cleaning mechanism and the driving mechanism, rotation of the filtering net cylinder and the brush roller can be completed at the same time through a single motor, then automatic cleaning of floccules on the filtering net cylinder is achieved, the automatic backwashing function is achieved, and cleaning work can also be completed in the working process of the device.

Description

Technical Field

[0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a petroleum drilling wastewater treatment device with a backflushing function. Background Art

[0002] Oil drilling wastewater is mainly produced in three links: First, the drilling fluid circulation process: drilling fluid is needed to cool the drill bit and carry cuttings during drilling. After contacting the formation, it mixes with formation water, cuttings and clay particles. After solid-liquid separation, the remaining wastewater containing suspended particles and chemical additives becomes the main source of wastewater; second, formation water discharge and flushing operations: when drilling encounters a groundwater layer, formation water mixes into the system, and the wastewater generated by equipment flushing and site cleaning will bring in oil, mud and residual chemicals, increasing the amount of wastewater; third, the residue from fracturing operations: in shale gas drilling, part of the fracturing fluid injected under high pressure cannot be completely returned, and the residual liquid reacts with the formation material and is discharged to form high-salt, high-organic wastewater. This type of wastewater contains pollutants such as petroleum, heavy metals, and polymers, and needs to be treated to meet the standards before being discharged or reused.

[0003] In oil drilling operations, wastewater is often pretreated to remove large suspended solids and sediment, and then treated with coagulation and sedimentation to remove fine colloids and organic matter. Alternatively, the water is further purified through filtration. Finally, for high-salt and high-pollutant wastewater, evaporation and crystallization are used for desalination, or advanced oxidation is used to degrade difficult-to-decompose organic matter. Existing wastewater treatment devices often have the problem of difficult cleaning of the filtration equipment when filtering suspended solids, sediment, colloids and other substances. Due to the continuous generation of wastewater, existing equipment often has to be suspended for cleaning. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the disadvantages of the above-mentioned prior art and provide a petroleum drilling wastewater treatment device with a backflushing function.

[0005] The technical solution adopted to solve the above technical problems is: to provide a petroleum drilling wastewater treatment device with a backflushing function, comprising a temporary storage box, one side of which is fixedly connected to a connecting shell, and the other end of which is fixedly connected to a water inlet pipe; Two groups of support assemblies are installed on the inner wall of the temporary storage box, and a filtering mechanism is rotatably connected between the two groups of support assemblies. A cleaning mechanism is fixedly connected to the top of the connecting shell, and a driving mechanism is installed on the top of the cleaning mechanism. A rotating support bearing frame corresponding to the cleaning mechanism and the driving mechanism is fixedly connected to one side of the top of the connecting shell, a collecting and discharging mechanism is installed between the top inner surface of the connecting shell and the cleaning mechanism, and an auxiliary spraying mechanism is fixedly connected to the top of the temporary storage box.

[0006] Furthermore, each group of the support components includes two support frames fixedly connected to the inner wall of the temporary storage box, and the two support frames are symmetrically arranged, and two limiting rollers are rotatably connected to the support frames.

[0007] Through the above technical solution, the two symmetrically arranged support frames and four limiting rollers can effectively provide stable rotation support for one side of the filtering mechanism.

[0008] Furthermore, the filtering mechanism respectively includes a first roller limiting ring and a second roller limiting ring rotatably connected to two groups of support components, a filter screen cylinder is fixedly connected between the first roller limiting ring and the second roller limiting ring, a circular baffle is fixedly connected to the inner wall of the first roller limiting ring, and an integrated gear ring is fixedly connected to the other side of the second roller limiting ring, and the circular baffle is provided with a limiting support ring groove corresponding to the cleaning mechanism on the side close to the filter screen cylinder.

[0009] Through the above technical solution, after the wastewater generated by drilling has passed through the screen and sedimentation tank to remove most of the suspended matter and sediment, after the coagulant and coagulant aid are added to the water, the fine colloidal particles and emulsified oil droplets are condensed into large flocs through charge neutralization and adsorption bridging. The larger flocs will be directly precipitated. At the same time, some flocs floating in the water will flow into the treatment device through the water inlet pipe with the water flow. The flocs generated in the water will be filtered by the filter cylinder and attached to the inner wall of the filter cylinder. At the same time, during the operation, the driving mechanism drives the first roller limit ring, the second roller limit ring and the filter cylinder to rotate as a whole by driving the integrated gear ring, and realizes rotation support between multiple limit rollers through the first roller limit ring and the second roller limit ring. At this time, the flocs at the bottom of the filter cylinder will be driven to the top by the rotating filter cylinder, and then jointly cleaned by the cleaning mechanism and the auxiliary spray mechanism, and finally collected and discharged by the collection and discharge mechanism.

[0010] Furthermore, the cleaning mechanism includes a supporting sleeve shell fixedly connected to the top of the connecting shell, a supporting circular sleeve fixedly connected to the center of the top inner surface of the supporting sleeve shell, a rotating rod rotatably connected between the supporting circular sleeve and the rotating support bearing frame, a first pulley fixedly connected to one side of the outer wall of the rotating rod, a brush roller fixedly connected to the center of the outer wall of the rotating rod, and a port support plate rotatably connected to the outer wall of the rotating rod between the two ends of the brush roller.

[0011] Through the above technical solution, the first pulley is driven by the driving mechanism to rotate, and then the rotating rod fixedly connected thereto is driven to rotate the brush roller to start cleaning the flocs on the top of the inner wall of the filter cylinder.

[0012] Furthermore, one end of the bottom of the port support plate is fixedly connected to one side of the top of the connection shell.

[0013] Through the above technical solution, the port support plate can effectively provide a certain support capacity for the brush roller, preventing the brush roller from being deformed after being completely suspended in the air for a long time. At the same time, the limiting support ring groove can also provide a certain limiting function for one end of the rotating rod.

[0014] Furthermore, the driving mechanism includes a first driving motor and a bearing bracket installed on the top of the cleaning mechanism, the output end of the first driving motor is fixedly connected to a second pulley, one side of the second pulley is fixedly connected to a driving gear, and a transmission belt is provided on the second pulley.

[0015] Through the above technical solution, during the operation, the first drive motor will drive the second pulley and the driving gear to rotate, and the driving gear will drive the first roller limiting ring, the second roller limiting ring and the filter screen drum to rotate as a whole by driving the integrated gear ring meshed therewith. At the same time, in the process of the first drive motor driving the second pulley to rotate, the transmission belt will drive the first pulley to rotate, and then drive the rotating rod fixedly connected thereto to rotate the brush roller. Since the rotation of the filter screen drum is transmitted through the meshing of the driving gear and the integrated gear ring, the rotation directions of the filter screen drum and the brush roller are opposite, which can further improve the cleaning efficiency. At the same time, due to the large difference in diameters of the driving gear and the integrated gear ring, even if the rotation speed of the filter screen drum is slow during the driving process, the brush roller can ensure a higher rotation speed to achieve rapid cleaning. The high-speed rotation also avoids flocs remaining on the brush roller.

[0016] Furthermore, the second pulley and the driving gear are fixedly connected via a circular shaft, and the circular shaft passes through the rotating support bearing frame.

[0017] Through the above technical solution, the cleaning mechanism and the driving mechanism can be further effectively supported in rotation by rotating the supporting bearing frame.

[0018] Furthermore, the collection and discharge mechanism includes a multi-stage electric rod fixedly connected to the cleaning mechanism and two side mounting plates fixedly connected to the top inner surface of the connecting shell, the output end of the multi-stage electric rod is fixedly connected to a connecting block, the bottom of the other side of the connecting block is fixedly connected to a second drive motor, the output end of the connecting block is fixedly connected to a connecting round rod, the other end of the connecting round rod is fixedly connected to a fan-shaped scraper, a collecting trough is fixedly connected between the two side mounting plates, and the outer wall of the other end of the collecting trough is fixedly connected to a discharge square pipe.

[0019] Through the above technical solution, by setting up a periodic start-up of the multi-stage electric rod and the second drive motor, the multi-stage electric rod will drive the connecting round rod and the fan-shaped scraper to move through the connecting block, and the fan-shaped scraper will completely scrape out the flocs in the collection trough, causing them to accumulate at one end of the collection trough, and finally flow out through the discharge square pipe accompanied by water flow. At the same time, a small amount of flocs stuck on the connecting round rod will also be scraped off by the holes in the collection trough during the movement. At the same time, during the resetting process of the fan-shaped scraper, the second drive motor drives the fan-shaped scraper to rotate a certain angle through the connecting round rod to avoid the flocs collected during the scraping process being squeezed to the other end by the reset fan-shaped scraper.

[0020] Furthermore, the arc of the bottom of the fan-shaped scraper and the arc of the inner wall of the collecting trough are the same in radian, and the collecting trough is a two-stage structure.

[0021] Through the above technical solution, the same curvature ensures that the fan-shaped scraper can completely scrape off the flocs in the collection tank. At the same time, the depth inside the filter cylinder in the two-stage structure is larger, ensuring that the collection work can be completed more completely.

[0022] Furthermore, the auxiliary spray mechanism includes a mounting bracket fixedly connected to the top of the temporary storage box, a water pump is installed on the top of the mounting bracket, the output end of the water pump is fixedly connected to a diversion pipe, and one side of the diversion pipe is fixedly connected to a plurality of pressurized nozzles at the center position of the mounting bracket.

[0023] Through the above technical solution, during the cleaning process of the brush roller, the water flow drawn by the water pump is diverted to multiple pressurized nozzles through the diversion pipe. The high-pressure water flow sprayed from the outside can further assist the cleaning of the brush roller and improve the cleaning effect. At the same time, part of the sprayed water flow will enter the collection tank and can assist the flocs to automatically flow out from the discharge square pipe.

[0024] The beneficial effects of the present invention are as follows: (1) The present invention designs a support assembly, a filtering mechanism, a cleaning mechanism and a driving mechanism, and a single motor can simultaneously complete the rotation of the filter drum and the brush roller, thereby realizing automatic cleaning of the flocs on the filter drum. At the same time, since the rotation of the filter drum is driven by the meshing of the driving gear and the integrated gear ring, the rotation directions of the filter drum and the brush roller are opposite, thereby further improving the cleaning efficiency. The diameter difference between the driving gear and the integrated gear ring is too large. Therefore, during the driving process, even if the rotation speed of the filter drum is slow, the brush roller can ensure a high rotation speed to achieve rapid cleaning. The high-speed rotation also avoids the flocs. The flocs remain on the brush roller, realizing the automatic backwashing function, and the cleaning work can be completed during the operation of the device; (2) The present invention designs a collection and discharge mechanism, and by setting a periodic start-up multi-stage electric rod and a second drive motor, the fan-shaped scraper will completely scrape out the flocs in the collection tank, so that it accumulates at one end of the collection tank, and finally flows out through the discharge square pipe accompanied by water flow. During the reset process of the fan-shaped scraper, the second drive motor drives the fan-shaped scraper to rotate a certain angle through the connecting round rod, so as to avoid the flocs collected during the scraping process being squeezed to the other end by the reset fan-shaped scraper. While completing the automatic cleaning and discharge, it also avoids the residual flocs inside the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic cross-sectional structure diagram of the present invention; Figure 3 This is a schematic diagram of the structure of the temporary storage box connected to the shell and the water inlet trough pipe of the present invention; Figure 4 It is a schematic structural diagram of the filtering mechanism of the present invention; Figure 5 It is a schematic structural diagram of the support assembly and filtering mechanism of the present invention; Figure 6 It is a schematic diagram of the three-dimensional cross-sectional structure of the filtering mechanism of the present invention; Figure 7 yes Figure 6 A partial enlarged view of point A in the middle; Figure 8 It is a schematic structural diagram of the cleaning mechanism of the present invention; Figure 9 yes Figure 8 Schematic diagram of the cross-section structure; Figure 10 It is a schematic diagram of the explosion structure of the cleaning mechanism and the driving mechanism of the present invention; Figure 11 It is a schematic structural diagram of the cleaning mechanism, driving mechanism and collecting and discharging mechanism of the present invention; Figure 12This is a schematic diagram of the explosion structure of the collection and discharge mechanism of the present invention; Figure 13 It is a structural schematic diagram of the auxiliary spraying mechanism of the present invention.

[0026] Figure numerals: 1, temporary storage box; 2, connecting shell; 3, water inlet trough pipe; 4, support assembly; 41, support frame; 42, limiting roller; 5, filtering mechanism; 501, first roller limiting ring; 502, second roller limiting ring; 503, filter screen; 504, circular baffle; 505, integrated gear ring; 506, limiting support ring groove; 6, cleaning mechanism; 601, support sleeve; 602, support circular sleeve; 603, rotating rod; 604, first pulley; 605, brush roller; 606, port support plate; 7, driving mechanism; 7 01. First drive motor; 702. Bearing bracket; 703. Second pulley; 704. Drive gear; 705. Transmission belt; 8. Rotating support bearing bracket; 9. Collection and discharge mechanism; 901. Multi-stage electric rod; 902. Side mounting plate; 903. Connecting block; 904. Second drive motor; 905. Connecting round rod; 906. Fan-shaped scraper; 907. Collection trough; 908. Discharge square pipe; 10. Auxiliary spray mechanism; 1001. Mounting bracket; 1002. Water pump; 1003. Diverter pipe; 1004. Pressurized nozzle. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0028] like Figure 1-Figure 3 As shown, a petroleum drilling wastewater treatment device with a backflushing function in this embodiment includes a temporary storage box 1, one side of the temporary storage box 1 is fixedly connected to a connecting shell 2, and the other end of the connecting shell 2 is fixedly connected to a water inlet pipe 3.

[0029] like Figure 1-Figure 7As shown, two groups of support assemblies 4 are installed on the inner wall of the temporary storage box 1, and each group of support assemblies 4 includes two support frames 41 fixedly connected to the inner wall of the temporary storage box 1, and the two support frames 41 are symmetrically arranged, and two limiting rollers 42 are rotatably connected to the support frames 41. The two symmetrically arranged support frames 41 and four limiting rollers 42 can effectively provide stable rotation support for one side of the filtering mechanism 5. The filtering mechanism 5 is rotatably connected between the two groups of support assemblies 4. The filtering mechanism 5 respectively includes two groups of support assemblies 4 rotatably connected to the two groups of support assemblies. The first roller limiting ring 501 and the second roller limiting ring 502 on the component 4 are fixedly connected with a filter cylinder 503 between the first roller limiting ring 501 and the second roller limiting ring 502. The inner wall of the first roller limiting ring 501 is fixedly connected with a circular baffle 504. The other side of the second roller limiting ring 502 is fixedly connected with an integrated gear ring 505. The circular baffle 504 is provided with a limiting support ring groove 506 corresponding to the cleaning mechanism 6 on the side close to the filter cylinder 503. The wastewater generated by drilling passes through After the grid and sedimentation tank remove most of the suspended matter and sediment, after adding coagulants and coagulant aids into the water, the fine colloidal particles and emulsified oil droplets are condensed into large flocs through charge neutralization and adsorption bridging. The larger flocs will be directly precipitated. At the same time, some flocs floating in the water will flow into the treatment device through the water inlet trough pipe 3 with the water flow. The flocs generated in the water will be filtered by the filter cylinder 503 and attached to the inner wall of the filter cylinder 503. At the same time, during the working process, the driving mechanism 7 drives the belt 7 to move the belt 7. The integrated gear ring 505 is driven to drive the overall rotation of the first roller limiting ring 501, the second roller limiting ring 502 and the filter screen cylinder 503, and the first roller limiting ring 501 and the second roller limiting ring 502 are used to realize rotation support between multiple limiting rollers 42. At this time, the flocs at the bottom of the filter screen cylinder 503 will be driven to the top by the rotating filter screen cylinder 503, and then subsequently cleaned together by the cleaning mechanism 6 and the auxiliary spraying mechanism 10, and finally collected and discharged by the collection and discharge mechanism 9.

[0030] like Figures 1-10As shown, the top of the connecting shell 2 is fixedly connected to a cleaning mechanism 6, and the cleaning mechanism 6 includes a support sleeve 601 fixedly connected to the top of the connecting shell 2, a support circular sleeve 602 is fixedly connected to the center of the top inner surface of the support sleeve 601, a rotating rod 603 is rotatably connected between the support circular sleeve 602 and the rotating support bearing frame 8, a first pulley 604 is fixedly connected to one side of the outer wall of the rotating rod 603, a brush roller 605 is fixedly connected to the center of the outer wall of the rotating rod 603, and a port support plate 606 is rotatably connected to the outer wall of the rotating rod 603 between the two ends of the brush roller 605. Driven by mechanism 7, the first pulley 604 is driven to rotate, and then the rotating rod 603 fixedly connected thereto is driven to rotate the brush roller 605, and the flocculent matter on the top of the inner wall of the filter cylinder 503 is started to be cleaned. One end of the bottom of the port support plate 606 is fixedly connected to the top side of the connecting shell 2. The port support plate 606 can effectively provide a certain support capacity for the brush roller 605 to prevent the brush roller 605 from being deformed after being completely suspended in the air for a long time. At the same time, the limiting support ring groove 506 can also provide a certain limiting function for one end of the rotating rod 603.

[0031] like Figures 1-10 As shown, a driving mechanism 7 is installed on the top of the cleaning mechanism 6, and the driving mechanism 7 includes a first driving motor 701 and a bearing bracket 702 installed on the top of the cleaning mechanism 6. The output end of the first driving motor 701 is fixedly connected to the second pulley 703, and one side of the second pulley 703 is fixedly connected to the driving gear 704. A transmission belt 705 is provided on the second pulley 703. During operation, the first driving motor 701 will drive the second pulley 703 and the driving gear 704 to rotate, and the driving gear 704 drives the first roller limiting ring 501, the second roller limiting ring 502 and the filter drum 503 to rotate as a whole by driving the integrated gear ring 505 meshed therewith. At the same time, when the first driving motor 701 drives the second pulley 703 to rotate, the first pulley 604 will be driven to rotate through the transmission belt 705, thereby performing the cleaning operation. The rotating rod 603 fixedly connected to it is driven to rotate the brush roller 605. Since the rotation of the filter drum 503 is achieved by the engagement of the driving gear 704 and the integrated gear ring 505, the rotation directions of the filter drum 503 and the brush roller 605 are opposite, which can further improve the cleaning efficiency. At the same time, since the diameter difference between the driving gear 704 and the integrated gear ring 505 is too large, even if the rotation speed of the filter drum 503 is slow during the driving process, the brush roller 605 can still ensure a high rotation speed to achieve rapid cleaning. The high-speed rotation also avoids flocs from remaining on the brush roller 605. The second pulley 703 and the driving gear 704 are fixedly connected by a circular shaft, and the circular shaft passes through the rotating support bearing frame 8. The rotating support bearing frame 8 can effectively provide further rotational support for the cleaning mechanism 6 and the driving mechanism 7.

[0032] like Figures 1-12 As shown, one side of the top of the connecting shell 2 is fixedly connected to a rotating support bearing frame 8 corresponding to the cleaning mechanism 6 and the driving mechanism 7, and a collecting and discharging mechanism 9 is installed between the top inner surface of the connecting shell 2 and the cleaning mechanism 6. The collecting and discharging mechanism 9 includes a multi-stage electric rod 901 fixedly connected to the cleaning mechanism 6 and two side mounting plates 902 fixedly connected to the top inner surface of the connecting shell 2. The output end of the multi-stage electric rod 901 is fixedly connected to a connecting block 903, and the bottom of the other side of the connecting block 903 is fixedly connected to a second driving motor 904. The output end of the connecting block 903 is fixedly connected to a connecting round rod 905, and the other end of the connecting round rod 905 is fixedly connected to a fan-shaped scraper 906. A collecting trough 907 is fixedly connected between the two side mounting plates 902, and the outer wall of the other end of the collecting trough 907 is fixedly connected to a discharge square pipe 908. By setting the multi-stage electric rod 901 and the second driving motor 904 to be started periodically, the multi-stage electric rod 901 will pass through the connecting block 9 03 drives the connecting rod 905 and the fan-shaped scraper 906 to move, and the fan-shaped scraper 906 will completely scrape out the flocs in the collection tank 907, so that they accumulate at one end of the collection tank 907, and finally flow out through the discharge square pipe 908 along with the water flow. At the same time, a small amount of flocs stuck on the connecting rod 905 will also be scraped off by the holes in the collection tank 907 during the movement. At the same time, during the reset of the fan-shaped scraper 906, the second drive motor 904 drives the fan-shaped scraper 906 through the connecting rod 905. The plate 906 rotates at a certain angle to prevent the flocs collected during the scraping process from being squeezed to the other end by the reset fan-shaped scraper 906. The arc of the bottom of the fan-shaped scraper 906 and the arc of the inner wall of the collection tank 907 are the same. The collection tank 907 is a two-stage structure. The same arc ensures that the fan-shaped scraper 906 can completely scrape off the flocs in the collection tank 907. At the same time, the depth inside the filter cylinder 503 in the two-stage structure is larger, ensuring that the collection work can be completed more completely.

[0033] like Figures 1-13 As shown, an auxiliary spray mechanism 10 is fixedly connected to the top of the temporary storage box 1, and the auxiliary spray mechanism 10 includes a mounting bracket 1001 fixedly connected to the top of the temporary storage box 1, and a water pump 1002 is installed on the top of the mounting bracket 1001. The output end of the water pump 1002 is fixedly connected to a diversion pipe 1003, and one side of the diversion pipe 1003 is fixedly connected to a plurality of pressurized nozzles 1004 at the center position of the mounting bracket 1001. During the cleaning process of the brush roller 605, the water flow extracted by the water pump 1002 is diverted to the plurality of pressurized nozzles 1004 through the diversion pipe 1003. The high-pressure water flow sprayed from the outside can further assist the cleaning of the brush roller 605 and improve the cleaning effect. At the same time, a part of the sprayed water flow will enter the collection tank 907 and can assist the flocs to automatically flow out from the discharge square pipe 908.

[0034] The working principle of this embodiment is as follows: after the wastewater generated by drilling has passed through the grid and sedimentation tank to remove most of the suspended matter and sediment, a coagulant such as polyaluminium chloride PAC, polyferric sulfate PFS and coagulant aid polyacrylamide PAM is added to the water. Through charge neutralization and adsorption bridging, the fine colloidal particles and emulsified oil droplets are condensed into large flocs. The larger flocs will be directly precipitated. At the same time, some flocs floating in the water will flow into the treatment device through the water inlet trough pipe 3 with the water flow. The flocs generated in the water will be filtered by the filter mesh cylinder 503 and the flocs will adhere to the inner wall of the filter mesh cylinder 503. During operation, the first drive motor 701 drives the second pulley 703 and the drive gear 704 to rotate. The drive gear 704 drives the integrated gear ring 505 meshed therewith to drive the first roller limiting ring 501, the second roller limiting ring 502 and the filter cylinder 503 to rotate as a whole. The first roller limiting ring 501 and the second roller limiting ring 502 realize rotation support between the multiple limiting rollers 42. At this time, the flocs at the bottom of the filter cylinder 503 will be driven to the top by the rotating filter cylinder 503, and some larger flocs will directly fall into the collection tank 907. At the same time, when the first drive motor 701 drives the second pulley 703 to rotate, the transmission belt 705 drives the first pulley 604 to rotate, and then drives the rotating rod 603 fixedly connected thereto, so that the brush roller 605 rotates and starts to clean the top of the inner wall of the filter drum 503. Since the rotation of the filter drum 503 is driven by the engagement of the driving gear 704 and the integrated gear ring 505, the rotation directions of the filter drum 503 and the brush roller 605 are opposite, which can further improve the cleaning efficiency. The brush roller 605 rotating in the opposite direction to the filter drum 503 cleans the flocs remaining on the inner wall of the filter drum 503 and makes it fall into the collection tank 907. At the same time, since the diameter difference between the driving gear 704 and the integrated gear ring 505 is too large, even if the rotation speed of the filter drum 503 is slow during the driving process, the brush roller 605 can ensure a high rotation speed to achieve rapid cleaning, and the high-speed rotation also prevents flocs from remaining on the brush roller 605. During the cleaning process of the brush roller 605, the water flow extracted by the water pump 1002 is diverted to multiple pressurized nozzles 1004 through the diversion pipe 1003. The high-pressure water flow sprayed from the outside can further assist the brush roller 605 in cleaning and improve the cleaning effect. By setting the multi-stage electric rod 901 and the second drive motor 904 to be started regularly, the multi-stage electric rod 901 will drive the connecting rod 905 and the fan-shaped scraper 906 to move through the connecting block 903, and the fan-shaped scraper 906 will remove the flocculants in the collection tank 907. The flocs are completely scraped out, accumulated at one end of the collecting tank 907, and finally flow out through the discharge square tube 908 along with the water flow. At the same time, a small amount of flocs stuck on the connecting round rod 905 will also be scraped off by the holes of the collecting tank 907 during the movement. At the same time, during the resetting of the fan-shaped scraper 906, the second drive motor 904 drives the fan-shaped scraper 906 to rotate a certain angle through the connecting round rod 905 to prevent the flocs collected during the scraping process from being squeezed to the other end by the reset fan-shaped scraper 906.

[0035] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A petroleum drilling wastewater treatment device with a backflushing function, comprising a temporary storage box (1), characterized in that: One side of the temporary storage box (1) is fixedly connected to a connecting shell (2), and the other end of the connecting shell (2) is fixedly connected to a water inlet trough pipe (3); Two groups of support assemblies (4) are installed on the inner wall of the temporary storage box (1), and a filtering mechanism (5) is rotatably connected between the two groups of support assemblies (4). A cleaning mechanism (6) is fixedly connected to the top of the connecting shell (2), and a driving mechanism (7) is installed on the top of the cleaning mechanism (6); A rotating support bearing frame (8) corresponding to the cleaning mechanism (6) and the driving mechanism (7) is fixedly connected to one side of the top of the connecting shell (2); a collecting and discharging mechanism (9) is installed between the top inner surface of the connecting shell (2) and the cleaning mechanism (6); and an auxiliary spraying mechanism (10) is fixedly connected to the top of the temporary storage box (1).

2. The oil drilling wastewater treatment device with a backflushing function according to claim 1 is characterized in that: Each group of the support components (4) includes two support frames (41) fixedly connected to the inner wall of the temporary storage box (1), and the two support frames (41) are symmetrically arranged. Two limiting rollers (42) are rotatably connected to the support frames (41).

3. The oil drilling wastewater treatment device with a backflushing function according to claim 1, characterized in that: The filtering mechanism (5) comprises a first roller limiting ring (501) and a second roller limiting ring (502) which are rotatably connected to the two groups of support assemblies (4); a filter screen cartridge (503) is fixedly connected between the first roller limiting ring (501) and the second roller limiting ring (502); a circular baffle (504) is fixedly connected to the inner wall of the first roller limiting ring (501); an integrated gear ring (505) is fixedly connected to the other side of the second roller limiting ring (502); and a limiting support ring groove (506) corresponding to the cleaning mechanism (6) is provided on the side of the circular baffle (504) close to the filter screen cartridge (503).

4. The oil drilling wastewater treatment device with a backflushing function according to claim 1, characterized in that: The cleaning mechanism (6) comprises a support sleeve (601) fixedly connected to the top of the connection shell (2); a support circular sleeve (602) is fixedly connected to the center of the top inner surface of the support sleeve (601); a rotating rod (603) is rotatably connected between the support circular sleeve (602) and the rotating support bearing frame (8); a first pulley (604) is fixedly connected to one side of the outer wall of the rotating rod (603); a brush roller (605) is fixedly connected to the center of the outer wall of the rotating rod (603); and a port support plate (606) is rotatably connected to the outer wall of the rotating rod (603) between the two ends of the brush roller (605).

5. The oil drilling wastewater treatment device with backflushing function according to claim 4, characterized in that: One end of the bottom of the port support plate (606) is fixedly connected to one side of the top of the connection shell (2).

6. The oil drilling wastewater treatment device with a backflushing function according to claim 1, characterized in that: The driving mechanism (7) comprises a first driving motor (701) and a bearing bracket (702) mounted on the top of the cleaning mechanism (6); an output end of the first driving motor (701) is fixedly connected to a second pulley (703); one side of the second pulley (703) is fixedly connected to a driving gear (704); and a transmission belt (705) is provided on the second pulley (703).

7. The oil drilling wastewater treatment device with a backflushing function according to claim 6, characterized in that: The second pulley (703) and the driving gear (704) are fixedly connected via a circular shaft, and the circular shaft passes through the rotating support bearing frame (8).

8. The oil drilling wastewater treatment device with a backflushing function according to claim 1, characterized in that: The collecting and discharging mechanism (9) comprises a multi-stage electric rod (901) fixedly connected to the cleaning mechanism (6) and two side mounting plates (902) fixedly connected to the inner surface of the top of the connecting shell (2); the output end of the multi-stage electric rod (901) is fixedly connected to a connecting block (903); the bottom of the other side of the connecting block (903) is fixedly connected to a second driving motor (904); the output end of the connecting block (903) is fixedly connected to a connecting round rod (905); the other end of the connecting round rod (905) is fixedly connected to a fan-shaped scraper (906); a collecting trough (907) is fixedly connected between the two side mounting plates (902); and the outer wall of the other end of the collecting trough (907) is fixedly connected to a discharge square pipe (908).

9. The oil drilling wastewater treatment device with a backflushing function according to claim 8, characterized in that: The arc of the bottom of the fan-shaped scraper (906) and the arc of the inner wall of the collecting trough (907) have the same curvature, and the collecting trough (907) is a two-stage structure.

10. The oil drilling wastewater treatment device with a backflushing function according to claim 1, characterized in that: The auxiliary spray mechanism (10) comprises a mounting bracket (1001) fixedly connected to the top of the temporary storage box (1); a water pump (1002) is mounted on the top of the mounting bracket (1001); a diversion pipe (1003) is fixedly connected to the output end of the water pump (1002); and a plurality of pressurized spray heads (1004) are fixedly connected to one side of the diversion pipe (1003) at the center of the mounting bracket (1001).

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