A filtering device for treating oily wastewater

Abstract

The present invention relates to the technical field of mechanical equipment for water resources, and in particular to a filtering device for treating oily sewage. A filtering device for treating oily sewage comprises a main barrel, a stirring mechanism and a suction mechanism. The stirring mechanism comprises a stirring tube and a plurality of stirring blade groups, each stirring blade group comprising a fixed blade and a movable blade. A first filter hole is provided on the fixed blade, and a second filter hole is provided on the movable blade. When the stirring tube rotates, the stirring tube drives the stirring blade group to rotate, and the movable blade contacts and fits tightly with the fixed blade. Afterwards, the liquid in the main barrel is drawn into the stirring tube through the suction mechanism, and the liquid is discharged from the first filter hole and the second filter hole. The water sprayed from the fixed blade and the movable blade will avoid the direct collision of the filter material with the fixed blade and the movable blade to a certain extent. The present invention provides a filtering device for treating oily sewage to solve the problem that the existing filter is easy to break the walnut filter material when the walnut filter material is turned over, thereby affecting the filtering effect of the filter.

Description

Technical Field

[0001] The invention relates to the technical field of special mechanical equipment for water resources, and in particular to a filtering device for treating oily sewage. Background Art

[0002] Sewage treatment is a series of process methods used to treat urban domestic sewage and industrial wastewater, aiming to render these wastewater harmless, reduce pollution to the environment, and even reuse them as water resources. The application of sewage treatment is very wide, involving many fields such as construction, agriculture, transportation, energy, petrochemicals, environmental protection, urban landscape, medical care, and catering. Through different treatment processes, harmful substances in sewage can be effectively removed to protect the environment from pollution. Sewage treatment processes include physical, chemical, and biological methods, such as sedimentation, filtration, adsorption, and biodegradation, which aim to remove pollutants such as suspended matter, organic matter, nutrients, and pathogens in water. After sewage is harmlessly treated and meets specific water quality standards, it can be used as recycled water, which helps to optimize the water supply structure, increase water resources, and alleviate the contradiction between supply and demand of water resources.

[0003] Walnut shell filter is a water filtration device that uses walnut shell as a filter medium. It is mainly used to remove oil and suspended solids from water. Walnut shell filter uses its filter medium, walnut shell, to adsorb free oil in water. It is especially suitable for low-concentration oil-water separation. Because walnut shell is oil-resistant, hydrophilic and non-lipophilic, it can effectively intercept impurities while allowing water molecules to pass through. As a natural material, walnut shell can be regenerated by backwashing and other methods to extend its service life.

[0004] For example, the utility model patent with the authorization announcement number CN219922171U provides a walnut shell filter with a backwashing function. By setting a stirring device, the stirring device can fully turn over the walnut filter material in the filter material layer during backwashing. However, when the stirring device turns over the walnut filter material, the walnut filter material is easily broken, and the walnut filter material is seriously lost, affecting the filtering effect of the filter, and the broken walnut filter material blocks the water outlet, affecting the backwashing effect. Summary of the invention

[0005] The invention provides a filtering device for treating oily sewage, so as to solve the problem that the walnut filter material is easily broken when the walnut filter material is turned over in the existing filter, thereby affecting the filtering effect of the filter.

[0006] The filtering device for treating oily wastewater of the present invention adopts the following technical scheme: The filtering device for treating oily wastewater comprises a main cylinder, a stirring mechanism and a suction mechanism, the main cylinder is vertically arranged, and filter material is arranged in the main cylinder.

[0007] The stirring mechanism includes a stirring tube and a plurality of stirring blade groups. The stirring tube is arranged in the main tube, and the stirring tube and the main tube are arranged coaxially. The plurality of stirring blade groups are distributed along the circumference of the stirring tube, and each stirring blade group includes a fixed blade and a moving blade. The fixed blade is fixedly arranged at the lower end of the stirring tube, and the fixed blade is arranged along the radial direction of the stirring tube, and a collecting chamber connected to the stirring tube is arranged on the fixed blade. The moving blade can be rotatably arranged at the lower end of the stirring tube along the circumference of the stirring tube, and the moving blade is arranged along the radial direction of the stirring tube. The moving blade has a first state and a second state. The first state of the moving blade is that the circumferential walls of the moving blade and the stator blade are in contact with each other, and the moving blade blocks the collecting chamber. The second state of the moving blade is that the moving blade and the stator blade are out of contact. A plurality of first filter holes are provided on the stator blade, and a plurality of second filter holes are provided on the moving blade. The suction mechanism is used to draw the liquid in the main tube into the stirring tube from the upper end of the stirring tube, and the liquid in the main tube flows out from the first filter hole and the second filter hole.

[0008] Furthermore, a transfer hole is provided at the upper end of the stirring tube. A transfer tube is fixedly provided at the upper end of the main tube, the upper end of the stirring tube is rotatably provided in the transfer tube, and the transfer hole is connected to the transfer tube. The suction mechanism includes a liquid return pipe and a first water pump. The first water pump is fixedly provided on the transfer tube, and the first water pump is connected to the transfer tube. The liquid return pipe is fixedly provided on the main tube, and both ends of the liquid return pipe are respectively connected to the first water pump and the main tube.

[0009] Furthermore, the filtering device for treating oily wastewater also includes a driving mechanism, which includes a main motor, which is fixedly arranged on the main cylinder, and the output shaft of the main motor is connected to the upper end of the stirring tube.

[0010] Furthermore, a recoil inlet is provided at the lower end of the main cylinder, a recoil outlet is provided at the upper end of the main cylinder, and a second water pump is provided at the recoil outlet.

[0011] Furthermore, a first baffle is provided at the recoil outlet, and the first baffle restricts the passage of filter material in the main cylinder.

[0012] Furthermore, a plurality of mounting openings are provided on the peripheral wall of the lower end of the stirring tube, and the plurality of mounting openings are distributed along the circumference of the stirring tube. Each stirring blade group is arranged in one mounting opening. An arc groove is provided in each mounting opening, and the arc groove and the stirring tube are arranged concentrically. A sliding column is fixedly provided on each moving blade, and the sliding column is slidably arranged in the arc groove.

[0013] Furthermore, each stirring blade group also includes a spring, which is arranged in the arc groove and is used to connect the arc groove and the sliding column.

[0014] Furthermore, a plurality of distribution plates are fixedly arranged on one side of each moving blade close to the fixed blade, the plurality of distribution plates are distributed along the radial direction of the stirring tube, and the distribution plates are arranged obliquely.

[0015] Furthermore, a second baffle plate is arranged in the main cylinder, and the second baffle plate divides the main cylinder into a filter chamber and a filter cleaning chamber at the top and bottom, and the filter material and the stirring mechanism are arranged in the filter chamber.

[0016] Furthermore, a sewage inlet and a filter material filling port are provided at the upper end of the main cylinder, a sewage outlet is provided at the lower end of the main cylinder, and the sewage outlet is communicated with the filter cleaning chamber.

[0017] The beneficial effects of the present invention are as follows: the filtering equipment for treating oily wastewater of the present invention, through the stirring mechanism and the suction mechanism, when the stirring tube rotates, the stirring tube drives the plurality of stirring blade groups to rotate. Under the impact force of water, the moving blades and the fixed blades contact and stick to each other. After that, the liquid in the main cylinder is sucked into the stirring tube through the suction mechanism, and the liquid is finally discharged from the first filter hole and the second filter hole. The water sprayed from the fixed blades and the moving blades will avoid the direct collision of the filter material with the fixed blades and the moving blades to a certain extent, thereby avoiding the loss of the filter material due to excessive crushing of the filter material.

[0018] When the stirring blade group rotates, a collection chamber is formed between the fixed blade and the moving blade, and the liquid is sprayed out from the first filter hole and the second filter hole to form a water film. When the stirring blade group is not rotating, the blade and the moving blade are out of contact, and the filter material in the collection chamber is discharged. This automatic process avoids the trouble of manual feeding. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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.

[0020] Figure 1 A schematic diagram of the structure of a filtering device for treating oily wastewater provided by an embodiment of the present invention;

[0021] Figure 2 An exploded view of a filtering device for treating oily wastewater provided by an embodiment of the present invention;

[0022] Figure 3 A front view of a filtering device for treating oily wastewater provided by an embodiment of the present invention;

[0023] Figure 4 A cross-sectional view of a filtering device for treating oily wastewater provided by an embodiment of the present invention;

[0024] Figure 5 A schematic diagram of a second state of a moving blade of a filtering device for treating oily wastewater provided by an embodiment of the present invention;

[0025] Figure 6 A schematic diagram of a first state of a moving blade of a filtering device for treating oily wastewater provided by an embodiment of the present invention;

[0026] Figure 7 A cross-sectional view of a stirring mechanism of a filtering device for treating oily wastewater provided in an embodiment of the present invention.

[0027] In the figure: 200, main motor; 300, transfer cylinder; 402, transfer hole; 404, moving blade; 4041, second filter hole; 4042, sliding column; 4043, dividing plate; 405, stirring tube; 4051, fixed blade; 4052, arc groove; 4053, first filter hole; 500, main cylinder; 501, sewage inlet; 502, backwash outlet; 503, backwash inlet; 504, sewage outlet; 505, filter material filling port; 600, filter material; 700, liquid return pipe; 800, first water pump; 1000, filter chamber. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Reference Figures 1 to 7 As shown, a filtering device for treating oily wastewater provided by an embodiment of the present invention includes a main cylinder 500 , a stirring mechanism and a suction mechanism. The main cylinder 500 is vertically arranged, and filter material 600 is arranged inside the main cylinder 500 .

[0030] The stirring mechanism includes a stirring tube 405 and a plurality of stirring blade groups. The stirring tube 405 is arranged in the main tube 500, and the stirring tube 405 and the main tube 500 are coaxially arranged. The plurality of stirring blade groups are distributed along the circumference of the stirring tube 405, and each stirring blade group includes a fixed blade 4051 and a moving blade 404. The fixed blade 4051 is fixedly arranged at the lower end of the stirring tube 405, and the fixed blade 4051 is arranged along the radial direction of the stirring tube 405, and a collecting chamber connected to the stirring tube 405 is arranged on the fixed blade 4051. The moving blade 404 can be rotatably arranged at the lower end of the stirring tube 405 along the circumference of the stirring tube 405, and the moving blade 404 is arranged along the radial direction of the stirring tube 405. The moving blade 404 has a first state and a second state. The first state of the moving blade 404 is that the peripheral walls of the moving blade 404 and the fixed blade 4051 are in contact with each other, and the moving blade 404 blocks the collecting chamber. The second state of the moving blade 404 is that the moving blade 404 is out of contact with the fixed blade 4051. The fixed blade 4051 is provided with a plurality of first filter holes 4053, and the moving blade 404 is provided with a plurality of second filter holes 4041. The suction mechanism is used to draw the liquid in the main cylinder 500 from the upper end of the stirring tube 405 into the stirring tube 405, and the liquid in the main cylinder 500 flows out from the first filter holes 4053 and the second filter holes 4041.

[0031] In the initial state, the moving blades 404 are in the second state. When the stirring tube 405 rotates, the stirring tube 405 drives the plurality of stirring blade groups to rotate. Under the impact force of the water, the moving blades 404 rotate, and the moving blades 404 contact and stick to the fixed blades 4051, and the moving blades 404 change from the second state to the first state. Afterwards, the liquid in the main cylinder 500 is drawn into the stirring tube 405 through the suction mechanism, and the liquid is finally discharged from the first filter hole 4053 and the second filter hole 4041. The water sprayed from the fixed blades 4051 and the moving blades 404 will avoid the direct collision of the filter material 600 with the fixed blades 4051 and the moving blades 404 to a certain extent, thereby avoiding the loss of the filter material 600 due to the excessive crushing of the filter material 600.

[0032] In this embodiment, a transfer hole 402 is provided at the upper end of the stirring tube 405. The upper end of the main cylinder 500 is fixedly provided with the rotating cylinder 300, the upper end of the stirring tube 405 is rotatably provided in the rotating cylinder 300, and the transfer hole 402 is communicated with the rotating cylinder 300. The suction mechanism includes a liquid return pipe 700 and a first water pump 800. The first water pump 800 is fixedly provided on the rotating cylinder 300, and the first water pump 800 is communicated with the rotating cylinder 300. The liquid return pipe 700 is fixedly provided on the main cylinder 500, and the two ends of the liquid return pipe 700 are respectively communicated with the first water pump 800 and the main cylinder 500. Then, the first water pump 800 is started. The first water pump 800 transfers the liquid in the main cylinder 500 into the intermediate cylinder 300 through the return pipe 700, and enters the stirring tube 405 through the intermediate hole 402, and then enters the collecting chamber between the moving blades 404 and the fixed blades 4051, and finally is discharged from the filter holes on the moving blades 404 and the fixed blades 4051.

[0033] In this embodiment, the filtering device for treating oily wastewater further includes a driving mechanism, which includes a main motor 200, which is fixedly arranged on the main cylinder 500, and the output shaft of the main motor 200 is connected to the upper end of the stirring tube 405. When the main motor 200 is started, the main motor 200 drives the stirring tube 405 to rotate, and the stirring tube 405 drives the multiple stirring blade groups to rotate.

[0034] In this embodiment, a backwash inlet 503 is provided at the lower end of the main cylinder 500, and a backwash outlet 502 is provided at the upper end of the main cylinder 500. A second water pump is provided at the backwash outlet 502. When the filter material 600 is to be cleaned, a washing liquid is introduced from the backwash inlet 503, and the washing liquid passes through the filter material 600 from bottom to top and cleans the filter material 600. Then, the filter material 600 is left to stand for a period of time to allow some oil to float to the top. Then, the second water pump is started to pump out the liquid in the main cylinder 500 through the backwash outlet 502, and take away some oil and small impurities.

[0035] In this embodiment, a first baffle is provided at the backflushing outlet 502 , and the first baffle restricts the filter material 600 in the main cylinder 500 from passing through, and liquid, oil stains and small impurities can pass through the first baffle.

[0036] In this embodiment, a plurality of mounting openings are provided on the peripheral wall of the lower end of the stirring tube 405, and the plurality of mounting openings are distributed along the circumference of the stirring tube 405. Each stirring blade group is arranged in one mounting opening. An arc groove 4052 is provided in each mounting opening, and the arc groove 4052 and the stirring tube 405 are arranged concentrically. A sliding column 4042 is fixedly provided on each moving blade 404, and the sliding column 4042 is slidably arranged in the arc groove 4052.

[0037] In this embodiment, each stirring blade group further includes a spring, which is disposed in the arc groove 4052 and is used to connect the arc groove 4052 and the sliding column 4042. When the stirring tube 405 is not rotating, under the action of the spring, the moving blade 404 is in the second state, and the moving blade 404 and the fixed blade 4051 are out of contact.

[0038] In this embodiment, a plurality of dividing plates 4043 are fixedly provided on one side of each moving blade 404 close to the fixed blade 4051, and the plurality of dividing plates 4043 are distributed along the radial direction of the stirring tube 405, and the dividing plates 4043 are arranged obliquely. When the moving blade 404 is in the first state, the moving blade 404 is in contact with and close to the fixed blade 4051, the dividing plate 4043 is in the collecting chamber, and the dividing plate 4043 is not in contact with the fixed blade 4051. When the liquid and the filter material 600 enter the collecting chamber through the stirring tube 405, during the rotation of the stirring tube 405, the collected filter material 600 will be more evenly dispersed between the plurality of dividing plates 4043, thereby preventing the filter material 600 from being concentratedly blocked by the centrifugal force on part of the first filter hole 4053, resulting in failure of water film generation in some areas. When the stirring tube 405 stops rotating, under the action of the spring, the movable blade 404 changes from the first state to the second state, and the movable blade 404 and the fixed blade 4051 are out of contact. Since the collected filter material 600 will be more evenly dispersed among the multiple distribution plates 4043, the collected filter material 600 will fall back into the main cylinder 500 more evenly.

[0039] In this embodiment, a second baffle plate is provided in the main cylinder 500, and the second baffle plate divides the main cylinder 500 into a filter chamber and a filter cleaning chamber 1000 at the upper and lower parts. The filter material 600 and the stirring mechanism are arranged in the filter chamber. The second baffle plate blocks the filter material 600 from passing through. The filtered sewage passes through the second baffle plate below the filter material 600 into the filter cleaning chamber 1000 and is then discharged through the sewage outlet 504.

[0040] In this embodiment, a sewage inlet 501 and a filter material filling port 505 are provided at the upper end of the main cylinder 500 , a sewage outlet 504 is provided at the lower end of the main cylinder 500 , and the sewage outlet 504 is communicated with the filter chamber 1000 .

[0041] Working process: In the initial state, the moving blades 404 are in the second state, and the moving blades 404 and the fixed blades 4051 are out of contact. A filtering device for treating oily wastewater includes a filtering stage and a backwashing stage.

[0042] Filtration stage: First, oily sewage is introduced into the main tube 500 through the sewage inlet 501. After the oily sewage passes through the filter material 600, the oil and particulate matter therein are removed by the filter material 600. The filtered sewage passes through the second baffle plate under the filter material 600 and enters the filter cavity 1000 and is then discharged through the sewage outlet 504.

[0043] Backwashing stage: After a period of filtration, the filter material 600 is backwashed. First, washing liquid is passed into the main barrel 500 through the backwashing inlet 503, and the washing liquid passes through the filter material 600 from bottom to top and washes the filter material 600. Then, it is left to stand for a period of time to allow some oil to float to the top and the filter material 600 flushed by the washing liquid to fall. Then, the second water pump is started to pump out the liquid in the main barrel 500 through the backwashing outlet 502, and take away some oil and small impurities, and then the washing liquid continues to be passed into the main barrel 500 through the backwashing inlet 503.

[0044] After being left to stand for a while again, the filter material 600 flushed by the washing liquid falls down, and then the main motor 200 is started, and the main motor 200 drives the stirring tube 405 to rotate, and the stirring tube 405 drives the plurality of stirring blades to rotate. Under the impact of the water, the moving blades 404 rotate, and the moving blades 404 change from the second state to the first state, and the moving blades 404 contact and stick to the fixed blades 4051. The purpose of leaving it to stand again at this time is to prevent the moving blades 404 and the fixed blades 4051 from getting stuck when they are combined.

[0045] Then, the first water pump 800 is started. The first water pump 800 transfers the liquid in the main cylinder 500 into the intermediate cylinder 300 through the return pipe 700, and enters the stirring tube 405 through the intermediate hole 402, and then enters the collecting chamber between the moving blades 404 and the fixed blades 4051, and is finally discharged from the first filter hole 4053 and the second filter hole 4041, and the filter material 600 will remain in the collecting chamber.

[0046] During this process, the stirring mechanism will stir the filter material 600 and the liquid in the main barrel 500, and the water sprayed from the fixed blades 4051 and the movable blades 404 will avoid the direct collision of the filter material 600 with the fixed blades 4051 and the movable blades 404 to a certain extent, thereby preventing the filter material 600 from being discharged from the first baffle plate at the backwash outlet 502 due to being too broken, avoiding a large amount of filter material 600 from escaping, and at the same time preventing the over-broken filter material 600 from clogging the first baffle plate, thereby affecting the backwash effect.

[0047] Subsequently, the water in the main cylinder 500 will be pumped out through the backwash outlet 502, thereby realizing the backwash process of the filter material 600. After the backwash process is completed, under the action of the spring, the movable blade 404 is reset, and the movable blade 404 is changed from the first state to the second state, the fixed blade 4051 is out of contact with the movable blade 404, and the filter material 600 in the collection chamber falls back into the main cylinder 500.

[0048] During the rotation of the stirring blade group, a collecting chamber is formed between the fixed blade 4051 and the moving blade 404, and the liquid is ejected from the first filter hole 4053 and the second filter hole 4041 to form a water film. When the stirring blade group is not rotating, the fixed blade 4051 is out of contact with the moving blade 404, and the filter material 600 in the collecting chamber is discharged. This automatic process avoids the trouble of manual feeding.

[0049] 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, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A filtering device for treating oily wastewater, characterized in that: It includes a main cylinder, a stirring mechanism and a suction mechanism, the main cylinder is vertically arranged, and filter material is arranged in the main cylinder; The stirring mechanism comprises a stirring tube and a plurality of stirring blade groups, wherein the stirring tube is arranged in the main tube, and the stirring tube and the main tube are arranged coaxially; the plurality of stirring blade groups are distributed along the circumference of the stirring tube, and each stirring blade group comprises a fixed blade and a moving blade; the fixed blade is fixedly arranged at the lower end of the stirring tube, and the fixed blade is arranged along the radial direction of the stirring tube, and a collecting chamber connected to the stirring tube is arranged on the fixed blade; the moving blade is rotatably arranged at the lower end of the stirring tube along the circumference of the stirring tube, and the moving blade is arranged along the radial direction of the stirring tube; the moving blade has a first state and a second state, and the first state of the moving blade is that the circumferential walls of the moving blade and the fixed blade are in contact with each other, and the moving blade blocks the collecting chamber; The second state of the moving blades is that the moving blades and the fixed blades are out of contact; a plurality of first filter holes are provided on the fixed blades, and a plurality of second filter holes are provided on the moving blades; the suction mechanism is used to draw the liquid in the main cylinder into the stirring tube from the upper end of the stirring tube, and the liquid in the main cylinder flows out from the first filter hole and the second filter hole, and a transfer hole is provided at the upper end of the stirring tube; a rotating cylinder is fixedly provided at the upper end of the main cylinder, and the upper end of the stirring tube is rotatably provided in the rotating cylinder, and the transfer hole is connected to the rotating cylinder; the suction mechanism includes a return liquid pipe and a first water pump; the first water pump is fixedly provided on the rotating cylinder, and the first water pump and the rotating cylinder are connected; the return liquid pipe is fixedly provided on the main cylinder, and the two ends of the return liquid pipe are respectively connected to the first water pump and the main cylinder, and a plurality of mounting openings are provided on the peripheral wall of the lower end of the stirring tube, and the plurality of mounting openings are distributed along the circumference of the stirring tube; each stirring blade group is provided in a mounting opening; an arc groove is provided in each mounting opening, and the arc groove and the stirring tube are concentrically arranged; each A sliding column is fixedly arranged on the moving blade, and the sliding column is slidably arranged in the arc groove. Each stirring blade group also includes a spring, which is arranged in the arc groove. The spring is used to connect the arc groove and the sliding column. A plurality of dividing plates are fixedly arranged on the side of each moving blade close to the fixed blade. The plurality of dividing plates are distributed along the radial direction of the stirring tube, and the dividing plates are inclined. In the initial state, the moving blade is in the second state. When the stirring tube rotates, the stirring tube drives the plurality of stirring blade groups to rotate. Under the impact force of water, the moving blade rotates, and the moving blade contacts and sticks to the fixed blade. The moving blade changes from the second state to the first state. Thereafter, the liquid in the main cylinder is pumped into the stirring tube through the suction mechanism, and the liquid is finally discharged from the first filter hole and the second filter hole. The water sprayed from the fixed blade and the moving blade will avoid direct collision of the filter material with the fixed blade and the moving blade to a certain extent. When the stirring blade group is not rotating, the blade is out of contact with the moving blade, and the filter material in the collecting chamber is discharged.

2. A filtering device for treating oily wastewater according to claim 1, characterized in that: It also includes a driving mechanism, which includes a main motor, which is fixed on the main cylinder, and the output shaft of the main motor is connected to the upper end of the stirring tube.

3. A filtering device for treating oily wastewater according to claim 1, characterized in that: A recoil inlet is provided at the lower end of the main cylinder, a recoil outlet is provided at the upper end of the main cylinder, and a second water pump is provided at the recoil outlet.

4. A filtering device for treating oily wastewater according to claim 1, characterized in that: A first baffle is provided at the backwash outlet, and the first baffle restricts the filter material in the main cylinder from passing through.

5. The filtering device for treating oily wastewater according to claim 1, characterized in that: A second baffle plate is arranged in the main cylinder, and the second baffle plate divides the main cylinder into a filter chamber and a filter cleaning chamber from top to bottom. The filter material and the stirring mechanism are arranged in the filter chamber.

6. A filtering device for treating oily wastewater according to claim 5, characterized in that: The upper end of the main cylinder is provided with a sewage inlet and a filter material filling port, the lower end of the main cylinder is provided with a sewage outlet, and the sewage outlet is communicated with the filter cleaning chamber.

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