Petroleum drilling waste liquid treatment device

Abstract

The invention belongs to the technical field of well drilling waste liquid treatment, and discloses a petroleum well drilling waste liquid treatment device which comprises a base fixed to the ground, a filter cartridge is fixedly installed on the base, a first filter screen with the middle sunken is arranged at the bottom end of the filter cartridge, and a residue discharging assembly used for discharging solid residues is arranged on one side of the first filter screen. A cleaning assembly for accelerating filtration and cleaning residues is arranged on the first filter screen; the treatment cylinder is fixedly connected to the bottom end of the filter cylinder and is communicated with the top end of the treatment cylinder; the deslagging assembly is communicated with the treatment cylinder; a stirring assembly in transmission connection with the cleaning assembly is arranged in the treatment cylinder, and an oil outlet assembly for discharging floating oil is arranged on the stirring assembly; the power assembly is fixedly mounted on the base and is in transmission connection with the stirring assembly. The device is compact in structure, easy to operate, convenient to use and low in manpower demand, automatic treatment of the petroleum drilling waste liquid can be achieved, the treatment efficiency is improved, meanwhile, floating oil can be collected, environmental pollution is reduced, and recycling of the floating oil is more convenient.

Description

Technical Field

[0001] The invention relates to the technical field of drilling waste liquid treatment, in particular to a petroleum drilling waste liquid treatment device. Background Art

[0002] The treatment of oil drilling waste fluid is a very important environmental protection link in the process of oil extraction. Drilling waste fluid contains a large amount of harmful substances, such as oil, heavy metals, chemical additives, etc. If it is discharged directly without treatment, it will cause serious pollution to the environment. Therefore, the treatment technology and methods of oil drilling waste fluid are crucial.

[0003] Traditional wastewater treatment methods often rely on simple sedimentation and filtration processes, but these methods are not ideal when treating drilling wastewater containing a large amount of solid residues and floating oil. The sedimentation process takes a long time and it is difficult to completely remove fine solid particles and floating oil; while the simple filtration process is easy to clog the filter screen, requiring frequent cleaning, which reduces the treatment efficiency.

[0004] Although some improved treatment devices have appeared in the prior art, these devices are often complex in structure, cumbersome to operate, and have limited treatment effects. For example, some devices improve the filtering effect by setting up multiple layers of filter screens, but the cleaning and replacement of the filter screens become more difficult; other devices try to accelerate the sedimentation of suspended matter in the waste liquid by adding a stirring device, but the stirring process easily causes the floating oil to be redispersed in the waste liquid, which reduces the treatment effect.

[0005] Therefore, a novel oil drilling waste liquid treatment device is urgently needed to solve the above-mentioned technical problems. Summary of the invention

[0006] The purpose of the present invention is to provide a device for treating waste liquid from oil drilling to solve the problems existing in the prior art.

[0007] To achieve the above object, the present invention provides the following solution: The present invention provides a device for treating oil drilling waste liquid, comprising:

[0008] A base, which is fixed on the ground and serves as a fixed foundation and frame of the device;

[0009] A filter cartridge, the filter cartridge is fixedly mounted on the base, a first filter screen with a concave middle portion is disposed at the bottom end of the filter cartridge, a slag discharge assembly for discharging solid residues is disposed on one side of the first filter screen, and a cleaning assembly for accelerating filtration and cleaning residues is disposed on the first filter screen;

[0010] A treatment cylinder, the treatment cylinder is fixedly connected to the bottom end of the filter cylinder and communicated with the top end of the treatment cylinder through the first filter screen, and the slag discharge assembly is communicated with the treatment cylinder; a stirring assembly drivingly connected to the cleaning assembly is arranged in the treatment cylinder, and an oil discharge assembly for discharging floating oil is arranged on the stirring assembly;

[0011] A power assembly is fixedly mounted on the base and is transmission-connected to the stirring assembly.

[0012] Preferably, the cleaning assembly includes a cleaning shaft transmission-connected to the stirring assembly, a plurality of arc-shaped cleaning blades are axially evenly spaced on the cleaning shaft, one end of the cleaning blade away from the cleaning shaft is connected to the inner wall of the filter cartridge, and the bottom end of the cleaning blade is slidably arranged with the top surface of the first filter screen.

[0013] Preferably, a flexible cleaning brush is provided at the bottom end of the cleaning blade, the length of the cleaning brush is greater than the distance between the cleaning blade and the first filter screen, and the cleaning brush is in sliding contact with the first filter screen.

[0014] Preferably, the slag discharge component includes a slag discharge port opened on the edge of one side of the filter, and the bottom end of the slag discharge port is fixedly connected to an inclined slag discharge conduit. During the rotation of the cleaning blade, the residue adhering to the first filter screen is cleaned to the edge position and discharged from the slag discharge port.

[0015] Preferably, a second inclined filter screen is provided at the bottom end of the slag discharge conduit, and a liquid collecting hopper is provided on the side wall of the slag discharge conduit body corresponding to the second filter screen, and the liquid collecting hopper is connected to the inner cavity of the processing cylinder through a one-way valve that opens one way in the processing cylinder.

[0016] Preferably, the stirring assembly includes a stirring shaft rotatably connected to the processing cylinder, and the stirring shaft is transmission-connected to the power assembly; a plurality of stirring rods are arranged on the stirring shaft, and a cleaning plate is fixedly connected between the ends of the stirring rods coaxially arranged longitudinally away from the stirring shaft, and the cleaning plate is in sliding contact with the inner wall of the processing cylinder.

[0017] Preferably, the oil outlet assembly includes an oil storage box which slides longitudinally on the stirring shaft, and a plurality of oil collecting rods are fixedly connected to the side walls of the oil storage box. The side walls of the oil collecting rods facing the rotation direction are provided with oil inlet slits, and the oil inlet slits are connected to the inner cavity of the oil storage box through oil guide grooves arranged in the oil collecting rods.

[0018] Preferably, a plurality of first oil outlet holes are provided at the bottom end of the side wall of the inner cavity of the oil storage box, a sealing plate sealingly and slidingly connected with the first oil outlet hole is provided in the first oil outlet hole, an elastic rod is fixedly connected to the side of the sealing plate facing the inside of the oil storage box, and the elastic rod is fixedly connected to a fixed plate fixedly connected in the oil storage box.

[0019] Preferably, a longitudinally arranged oil guide cavity is provided on the stirring shaft, and a plurality of second oil inlet holes longitudinally corresponding to the first oil outlet hole are provided at the top of the oil guide cavity. When the first oil outlet hole is aligned with the second oil inlet hole, the elastic rod pushes the sealing plate to insert into the second oil inlet hole, and the collected oil enters the oil guide cavity.

[0020] Preferably, an oil outlet box is provided on the base, the stirring shaft passes through the oil outlet box and is rotatably connected to the oil outlet box; the bottom end of the oil guide cavity is connected to the oil outlet box through a plurality of second oil outlet holes.

[0021] Compared with the prior art, the present invention has the following advantages and technical effects: the present invention discloses a device for treating waste liquid from oil drilling, which is mainly used for treating waste liquid generated by oil drilling, and mainly comprises a fixed base, on which a filter cartridge, a treatment cartridge and a power assembly are mounted; a cleaning assembly is arranged in the filter cartridge, and the power assembly serves as the power of the cleaning assembly, and assists in discharging the residue generated by filtering the first filter screen 21 from the residue discharge assembly, so as to achieve solid-liquid separation of the drilling waste liquid, and the separation speed is fast and the separation effect is good; the filtered liquid containing oil pollution enters the treatment cartridge, and a reagent that reacts with the oil pollution is added to separate and float the oil pollution, and the oil pollution is collected and discharged through the oil discharge assembly, so as to achieve oil-water separation, and the stirring assembly is used for stirring the oil-containing wastewater to accelerate the reaction, and at the same time, the treatment cartridge is cleaned to avoid residue, so as to achieve rapid oil-water separation; during specific operation, the waste liquid first enters the filter cartridge, and the large particles of solid residue are filtered out through the first filter screen, and the filtered liquid enters the treatment cartridge, and the stirring assembly is arranged in the treatment cartridge for further treating the waste liquid, and at the same time, the stirring assembly also drives the oil discharge assembly to work, and collects the floating oil in the waste liquid; the power assembly provides power for the entire device.

[0022] The invention has the advantages of compact structure, simple operation, convenient use, low manpower requirement, and can realize the automatic treatment of oil drilling waste liquid, thereby improving the treatment efficiency. Meanwhile, it can collect floating oil, reduce environmental pollution, and make it more convenient to recycle the floating oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0024] Figure 1 This is an axial view of the oil drilling waste liquid treatment device of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of the oil drilling waste liquid treatment device of the present invention;

[0026] Figure 3 For the present invention Figure 2 A partial enlarged view of middle A;

[0027] Figure 4 For the present invention Figure 2 A partial enlarged view of B in the middle;

[0028] Figure 5 For the present invention Figure 2 A partial enlarged view of middle C;

[0029] Figure 6 For the present invention Figure 2 A partial enlarged view of D in the middle;

[0030] Figure 7 For the present invention Figure 2 A partial enlarged view of E in the middle;

[0031] Figure 8 This is a schematic diagram of the top view of the filter assembly of the present invention;

[0032] Fig. 9 It is a structural schematic diagram of the sealing plate of the present invention;

[0033] In the figure: 1, base; 2, filter cartridge; 3, treatment cartridge; 4, power assembly; 11, base plate; 12, column; 13, reinforcing rod; 14, fixing ring; 21, first filter screen; 22, cleaning shaft; 23, cleaning blade; 24, cleaning brush; 25, slag outlet; 26, slag guide tube; 27, second filter screen; 28, liquid collecting hopper; 29, one-way valve; 210, top cover; 211, liquid inlet; 31, stirring shaft; 32, stirring rod; 33, cleaning plate; 34, dosing box; 35, oil storage box; 36, oil collecting Rod; 37, oil inlet slit; 38, oil guide groove; 39, first oil inlet hole; 310, first oil outlet hole; 311, sealing plate; 312, elastic rod; 313, telescopic rod; 314, telescopic spring; 315, oil guide cavity; 316, second oil inlet hole; 317, oil outlet box; 318, second oil outlet hole; 319, oil outlet pipe; 320, liquid level sensor; 321, buoyancy block; 322, positioning ring; 323, fixing plate; 41, power motor; 42, driving wheel; 43, driven wheel; 44, transmission belt. DETAILED DESCRIPTION

[0034] 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.

[0035] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] Reference Figure 1-Figure 9 As shown, this embodiment provides a petroleum drilling waste liquid treatment device, comprising:

[0037] Base 1, which is fixed on the ground and serves as a fixed foundation and frame of the device;

[0038] The filter cartridge 2 is fixedly mounted on the base 1. A first filter screen 21 with a concave middle portion is disposed at the bottom end of the filter cartridge 2. A slag discharge assembly for discharging solid residues is disposed on one side of the first filter screen 21. A cleaning assembly for accelerating filtration and cleaning residues is disposed on the first filter screen 21.

[0039] The treatment cylinder 3 is fixedly connected to the bottom end of the filter cylinder 2 and communicated with the top end of the treatment cylinder 3 through the first filter screen 21, and the slag discharge assembly is communicated with the treatment cylinder 3; a stirring assembly is provided in the treatment cylinder 3 and is connected to the cleaning assembly in a transmission manner, and an oil discharge assembly for discharging floating oil is provided on the stirring assembly;

[0040] The power assembly 4 is fixedly mounted on the base 1 and is transmission-connected to the stirring assembly.

[0041] The present invention discloses a device for treating waste liquid from oil drilling, which is mainly used for treating waste liquid generated by oil drilling, and mainly comprises a fixed base 1, on which a filter cartridge 2, a treatment cartridge 3 and a power assembly 4 are mounted; a cleaning assembly is arranged in the filter cartridge 2, and the power assembly 4 serves as the power of the cleaning assembly, and assists in discharging the residue generated by filtering of a first filter screen 21 from the residue discharge assembly, thereby realizing solid-liquid separation of the waste liquid from the drilling, with fast separation speed and good separation effect; the filtered liquid containing oil pollution enters the treatment cartridge 3, and a reagent that reacts with the oil pollution is added to separate the oil pollution and float it up , and collected and discharged through the oil outlet component to achieve oil-water separation. The stirring component is used to stir the oily wastewater to accelerate the reaction, and at the same time clean the treatment cylinder 3 to avoid residue and achieve rapid oil-water separation. During specific operation, the waste liquid first enters the filter cylinder 2, and the large particles of solid residue are filtered out by the first filter screen 21. The filtered liquid enters the treatment cylinder 3, and the treatment cylinder 3 has a stirring component to further treat the waste liquid. At the same time, the stirring component also drives the oil outlet component to work and collect the floating oil in the waste liquid. The power component 4 provides power for the entire device. The present invention has a compact structure, simple operation, easy use, and low manpower requirements. It can realize the automated treatment of oil drilling waste liquid, improve the treatment efficiency, and can collect floating oil, reduce environmental pollution, and also facilitate the recycling of floating oil.

[0042] In one embodiment of the present application, a plurality of dosing boxes 34 are provided on the outer wall of the treatment tube 3 for adding agents with different effects into the sewage; each dosing box 34 is individually controlled and can add a fixed amount of agents into the treatment box at different times.

[0043] In one embodiment of the present application, the base 1 includes a horizontally placed substrate 11, on which a plurality of columns 12 are arranged, and the outer walls of the treatment cylinder 3 and the filter cylinder 2 are provided with a plurality of fixing rings 14, which are fixedly connected to reinforcing rods 13 arranged between adjacent columns 12, thereby facilitating the fixation of the treatment cylinder 3 and the filter cylinder 2 and improving the stability of the device.

[0044] In one embodiment of the present application, the power component 4 includes a power motor 41 installed on the substrate 11, the output shaft of the power motor 41 is connected to the driving wheel 42, the driving wheel 42 is connected to the driven wheel 43 through the transmission belt 44, and the driven wheel 43 can drive the stirring component to rotate.

[0045] In one embodiment of the present application, the driving wheel 42 and the driven wheel 43 can be selected as pulleys or sprockets, and the transmission belt 44 can be selected as a belt or a chain.

[0046] Further optimization scheme, the cleaning component includes a cleaning shaft 22 that is transmission-connected to the stirring component, and a plurality of arc-shaped cleaning blades 23 are axially and evenly spaced on the cleaning shaft 22. The end of the cleaning blade 23 away from the cleaning shaft 22 is connected to the inner wall of the filter cylinder 2, and the bottom end of the cleaning blade 23 is slidably arranged with the top surface of the first filter screen 21. The cleaning component includes a cleaning shaft 22 and a plurality of cleaning blades 23. The cleaning shaft 22 is connected to the power component 4. When the power component 4 is working, the cleaning shaft 22 drives the cleaning blade 23 to rotate without the need for additional power, thereby reducing the complexity of the equipment; the bottom end of the cleaning blade 23 is in sliding contact with the top surface of the first filter screen 21, and the residue adhering to the first filter screen 21 can be cleaned off, effectively preventing the first filter screen 21 from being blocked and improving the filtering efficiency.

[0047] In one embodiment of the present application, referring to the attached Figure 8 As shown, the cleaning blade 23 is designed to be arc-shaped along the rotation direction, which can form a structure similar to a screw conveyor, pushing the filtered solid residue from the recessed first filter screen 21 and finally discharging it from the slag discharge assembly.

[0048] In one embodiment of the present application, a top cover 210 is disposed at the top of the filter cartridge 2 , and a liquid inlet 211 for feeding drilling waste fluid is disposed on the top cover 210 , and the liquid inlet 211 is located directly above the cleaning shaft 22 .

[0049] In one embodiment of the present application, an annular shielding ring is provided in the filter cartridge 2, and the shielding ring is in sliding contact with the top of the cleaning blade 23. When the residue is pushed by the cleaning blade 23, the shielding ring can prevent the residue from overflowing, and can also squeeze the residual light to further dehydrate.

[0050] Further optimization scheme, the bottom end of the cleaning blade 23 is provided with a flexible cleaning brush 24, the length of the cleaning brush 24 is greater than the distance between the cleaning blade 23 and the first filter 21, and the cleaning brush 24 is in sliding contact with the first filter 21. A flexible cleaning brush 24 is provided at the bottom end of the cleaning blade 23, and when the cleaning blade 23 rotates, the cleaning brush 24 can more effectively clean the residue on the first filter 21, further improving the cleaning effect, while also avoiding the rigid contact between the cleaning blade 23 and the first filter 21, avoiding scratches on the first filter 21, and extending the service life of the first filter 21; facilitating the maintenance of the equipment and reducing the use cost.

[0051] In a further optimized solution, the slag discharge assembly includes a slag discharge port 25 opened at the edge of one side of the filter, and the bottom end of the slag discharge port 25 is fixedly connected to an inclined slag discharge conduit 26. During the rotation of the cleaning blade 23, the residue adhering to the first filter screen 21 is cleaned to the edge and discharged from the slag discharge port 25. When the cleaning blade 23 cleans the residue to the edge of the filter cylinder 2, the residue will enter the slag discharge conduit 26 through the slag discharge port 25, and then be discharged from the device, realizing the automatic discharge of the residue, avoiding the accumulation of the residue, and improving the processing efficiency.

[0052] Further optimization scheme, the bottom end of the slag discharge conduit 26 is provided with an inclined second filter screen 27, and the side wall of the slag discharge conduit 26 is provided with a liquid collecting hopper 28 corresponding to the second filter screen 27, and the liquid collecting hopper 28 is connected with the inner cavity of the treatment barrel 3 through a one-way valve 29 that is opened one-way in the tank treatment barrel 3. When the residue is discharged, it slides down along the inclined second filter screen 27, and the water in the residue and the overflowing water are filtered by the second filter screen 27. The residue is discharged, and the sewage is introduced into the liquid collecting hopper 28 for collection, and then discharged back to the treatment barrel 3 through the one-way valve 29 for subsequent treatment, which reduces the water content in the discharged residue, improves the resource utilization rate, and reduces the pollution of the environment by untreated sewage.

[0053] Further optimized scheme, the stirring assembly includes a stirring shaft 31 rotatably connected to the treatment barrel 3, and the stirring shaft 31 is transmission-connected to the power assembly 4; a plurality of stirring rods 32 are arranged on the stirring shaft 31, and a cleaning plate 33 is fixedly connected between the ends of the stirring rods 32 coaxially arranged longitudinally away from the stirring shaft 31, and the cleaning plate 33 is in sliding contact with the inner wall of the treatment barrel 3. The stirring shaft 31 is connected to the power assembly 4. When the power assembly 4 is working, the stirring shaft 31 drives the stirring rods 32 to rotate, stirs the waste liquid in the treatment barrel 3, accelerates the mixing speed of the added reagent and sewage, and facilitates the floating of oil in the water, thereby improving the treatment effect of the waste liquid and making the waste liquid more uniform.

[0054] In one embodiment of the present application, a liquid level sensor 320 is provided on the stirring shaft 31. When the liquid level reaches a specified position, an alarm is issued and no new sewage is poured in.

[0055] Further optimization scheme, the oil outlet assembly includes an oil storage box 35 that slides longitudinally on the stirring shaft 31, and a plurality of oil collecting rods 36 are fixedly connected to the side wall of the oil storage box 35. The side wall of the oil collecting rod 36 facing the rotation direction is provided with an oil inlet slit 37, and the oil inlet slit 37 is connected with the inner cavity of the oil storage box 35 through an oil guide groove 38 provided in the oil collecting rod 36. A buoyancy block 321 is provided at the bottom end of the oil storage box 35, so that the oil storage box 35 can float on the water surface. The oil collecting rod 36 is provided with an oil inlet slit 37. When the stirring rod 32 rotates, the floating oil in the waste liquid will enter the oil guide groove 38 in the oil collecting rod 36 through the oil inlet slit 37, and then flow into the oil storage box 35 through the first oil inlet hole 39 for storage, realizing the automatic collection of floating oil and reducing environmental pollution.

[0056] To further optimize the solution, a plurality of first oil outlet holes 310 are provided at the bottom of the inner side wall of the oil storage box 35. A sealing plate 311 is provided in the first oil outlet hole 310, which is in sealing and sliding connection with the first oil outlet hole 310. An elastic rod 312 is fixedly connected to the side of the sealing plate 311 facing the inside of the oil storage box 35. The elastic rod 312 is fixedly connected to a fixed plate fixedly connected to the inside of the oil storage box 35. When the floating oil in the oil storage box 35 accumulates to a certain amount, the pressure on the sealing plate 311 is greater than the pulling force of the elastic rod 312, and the sealing plate 311 will be pushed open, and the floating oil will flow out through the first oil outlet hole 310, so that the waste oil is cleaned and the floating oil is discharged quantitatively, which avoids the overflow problem caused by too much floating oil in the oil storage box 35.

[0057] In one embodiment of the present application, one end of the sealing plate 311 away from the oil storage box 35 extends out of the oil storage box and slides with the outer wall of the stirring shaft 31, so that the oil storage box 35 cannot be opened before reaching the set position, thereby avoiding leakage of waste oil.

[0058] Further optimization scheme, a longitudinally arranged oil guide cavity 315 is provided on the stirring shaft 31, and a plurality of second oil inlet holes 316 longitudinally corresponding to the first oil outlet hole 310 are provided at the top of the oil guide cavity 315. When the first oil outlet hole 310 is aligned with the second oil inlet hole 316, the elastic rod 312 pushes the sealing plate 311 to insert into the second oil inlet hole 316, and the collected oil enters the oil guide cavity 315. When the first oil outlet hole 310 is aligned with the second oil inlet hole 316, the sealing plate 311 loses the restriction of the stirring shaft 31 and will be inserted into the second oil inlet hole 316, so that the first oil outlet hole 310 is released, and the floating oil is introduced into the oil guide cavity 315, so that the floating oil is further collected and transmitted, which provides convenience for the subsequent floating oil treatment.

[0059] In one embodiment of the present application, a positioning ring 322 is designed in the first oil outlet hole 310 to achieve positioning of the sealing plate 311 .

[0060] In one embodiment of the present application, the elastic rod 312 includes a telescopic rod 313 with telescopic capability, the telescopic rod 313 is connected between the sealing plate 311 and the fixed plate 323, and a telescopic spring 314 is sleeved on the telescopic rod 313, and the two ends of the telescopic spring 314 are respectively fixed to the fixed plate 323 and the sealing plate 311.

[0061] Further optimization scheme, an oil outlet box 317 is arranged on the base 1, and the stirring shaft 31 passes through the oil outlet box 317 and is rotatably connected with the oil outlet box 317; the bottom end of the oil guide cavity 315 is connected with the oil outlet box 317 through a plurality of second oil outlet holes 318. The bottom end of the oil guide cavity 315 is connected with the oil outlet box 317 through the second oil outlet holes 318. When the floating oil in the oil guide cavity 315 accumulates to a certain amount, the floating oil will flow into the oil outlet box 317 through the second oil outlet holes 318, and then be discharged from the device through the oil outlet pipe 319, so as to realize the final discharge of the floating oil and complete the whole waste liquid treatment process. At the same time, the setting of the oil outlet box 317 also facilitates the collection and subsequent treatment of the floating oil.

[0062] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0063] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A device for treating waste liquid from oil drilling, characterized in that: include: A base (1), the base (1) being fixed on the ground and serving as a fixed foundation and frame of the device; A filter cartridge (2), the filter cartridge (2) being fixedly mounted on the base (1), the bottom end of the filter cartridge (2) being provided with a first filter screen (21) with a recessed middle portion, a slag discharge component for discharging solid residue being provided on one side of the first filter screen (21), and a cleaning component for accelerating filtration and cleaning residue being provided on the first filter screen (21); A treatment cylinder (3), the treatment cylinder (3) is fixedly connected to the bottom end of the filter cylinder (2) and is connected to the top end of the treatment cylinder (3) through the first filter screen (21), and the slag discharge component is connected to the treatment cylinder (3); a stirring component is arranged in the treatment cylinder (3) and is connected to the cleaning component in a transmission manner, and an oil discharge component for discharging floating oil is arranged on the stirring component; A power assembly (4), wherein the power assembly (4) is fixedly mounted on the base (1), and the power assembly (4) is transmission-connected to the stirring assembly.

2. The oil drilling waste liquid treatment device according to claim 1 is characterized in that: The cleaning assembly comprises a cleaning shaft (22) which is transmission-connected to the stirring assembly, and a plurality of arc-shaped cleaning blades (23) are axially arranged at equal intervals on the cleaning shaft (22); one end of the cleaning blade (23) away from the cleaning shaft (22) is connected to the inner wall of the filter cylinder (2), and the bottom end of the cleaning blade (23) is slidably arranged on the top surface of the first filter screen (21).

3. The oil drilling waste liquid treatment device according to claim 2 is characterized in that: A flexible cleaning brush (24) is provided at the bottom end of the cleaning blade (23); the length of the cleaning brush (24) is greater than the distance between the cleaning blade (23) and the first filter screen (21); and the cleaning brush (24) is in sliding contact with the first filter screen (21).

4. The oil drilling waste liquid treatment device according to claim 2 is characterized in that: The slag discharge assembly comprises a slag discharge port (25) opened at the edge of one side of the filter, the bottom end of the slag discharge port (25) is fixedly connected to an inclined slag discharge conduit (26), and during the rotation of the cleaning blade (23), the residue adhered to the first filter screen (21) is cleaned to the edge position and discharged from the slag discharge port (25).

5. The oil drilling waste liquid treatment device according to claim 4 is characterized in that: The bottom end of the slag discharge conduit (26) is provided with a second filter screen (27) which is arranged obliquely, and the side wall of the slag discharge conduit (26) is provided with a liquid collecting hopper (28) which is arranged corresponding to the second filter screen (27), and the liquid collecting hopper (28) is connected to the inner cavity of the treatment cylinder (3) through a one-way valve (29) which is opened in one direction of the treatment cylinder (3).

6. The oil drilling waste liquid treatment device according to claim 1, characterized in that: The stirring assembly comprises a stirring shaft (31) rotatably connected to the processing cylinder (3), and the stirring shaft (31) is transmission-connected to the power assembly (4); a plurality of stirring rods (32) are arranged on the stirring shaft (31), and a cleaning plate (33) is fixedly connected between the ends of the stirring rods (32) coaxially arranged longitudinally and away from the stirring shaft (31), and the cleaning plate (33) is in sliding contact with the inner wall of the processing cylinder (3).

7. The oil drilling waste liquid treatment device according to claim 6 is characterized in that: The oil outlet assembly comprises an oil storage box (35) which slides longitudinally on the stirring shaft (31); a plurality of oil collecting rods (36) are fixedly connected to the side wall of the oil storage box (35); an oil inlet slit (37) is formed on the side wall of the oil collecting rod (36) facing the rotation direction; the oil inlet slit (37) is communicated with the inner cavity of the oil storage box (35) through an oil guide groove (38) provided in the oil collecting rod (36).

8. The oil drilling waste liquid treatment device according to claim 7, characterized in that: A plurality of first oil outlet holes (310) are provided at the bottom end of the inner cavity side wall of the oil storage box (35); a sealing plate (311) is provided in the first oil outlet hole (310) and is in sealing and sliding connection with the first oil outlet hole (310); an elastic rod (312) is fixedly connected to one side of the sealing plate (311) facing the inside of the oil storage box (35); and the elastic rod (312) is fixedly connected to a fixing plate fixedly connected to the inside of the oil storage box (35).

9. The oil drilling waste liquid treatment device according to claim 8, characterized in that: The stirring shaft (31) is provided with a longitudinally arranged oil guide cavity (315), and a plurality of second oil inlet holes (316) longitudinally corresponding to the first oil outlet hole (310) are provided at the top of the oil guide cavity (315). When the first oil outlet hole (310) is aligned with the second oil inlet hole (316), the elastic rod (312) pushes the sealing plate (311) to be inserted into the second oil inlet hole (316), and the collected oil enters the oil guide cavity (315).

10. The oil drilling waste liquid treatment device according to claim 9, characterized in that: An oil outlet box (317) is provided on the base (1); the stirring shaft (31) passes through the oil outlet box (317) and is rotatably connected to the oil outlet box (317); the bottom end of the oil guide cavity (315) is connected to the oil outlet box (317) through a plurality of second oil outlet holes (318).

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