A reverse and concurrent flotation process system

Abstract

The present invention relates to the field of sewage treatment, and in particular to a reverse and parallel flow flotation process system, including a dosing area, a reverse contact area, a parallel contact area, a separation area and a clear liquid area arranged in a flotation device box; a sewage inlet and a dosing port are arranged at the bottom of the dosing area, and an electric valve is arranged on the dosing port; an agitator and a fluorescent sensor are arranged in the dosing area; a reverse flow dissolved air releaser is arranged at the bottom of the reverse contact area, and a parallel flow dissolved air releaser is arranged at the bottom of the parallel contact area, and high-pressure nozzles are arranged above the reverse flow dissolved air releaser and the parallel flow dissolved air releaser; a reciprocating device is arranged above the top of the separation area, and an oil skimming plate device that moves up and down is arranged on the reciprocating device. The present invention can automatically control the amount of dosing and mix and stir the liquid medicine evenly; the mobile trolley can filter out floccules when moving left and right; at the same time, high-pressure water is sprayed from the high-pressure nozzle to the surface of the dissolved air releaser to avoid clogging of the dissolved air releaser.

Description

Technical Field

[0001] The invention relates to the field of sewage treatment, in particular to a reverse and concurrent flotation process system. Background Art

[0002] With the rapid development of global industry, the demand for oil is increasing, and the oily wastewater generated by refineries is also increasing. Oily wastewater is characterized by high emulsification, low content of dirty oil and suspended solids, which increases the difficulty of treatment. Traditional treatment technology cannot meet the discharge requirements. The flotation method is widely used due to its advantages such as good treatment effect, low dosage, short residence time and small footprint. The principle of flotation oil removal is: oily wastewater enters from the water inlet, and the solution of coagulant and flocculant is introduced from the drug inlet. The impeller rotates and stirs evenly, so that the smaller diameter oil droplets and suspended solids (hereinafter referred to as flocs) form a larger diameter. High-pressure dissolved air water is introduced into the contact area, and the bubbles generated by the low-pressure release of the dissolved air releaser are combined with the flocculated and flocculated oil droplets and suspended solids to form a flocculent body with a density less than that of water. The chain-driven skimmer device is activated to scrape the flocculent body into the oil storage tank, and the treated oily wastewater is discharged through the outlet.

[0003] For example, in the prior art: Chinese patent publication number CN214611888U provides a new horizontal flotation device, Chinese patent publication number CN220845615U provides an air flotation scraper, Chinese patent publication number CN117843068A provides an air flotation machine with high dissolved air efficiency, Chinese patent publication number CN221071108U provides an air flotation machine, Chinese patent publication number CN117699897B provides an air flotation machine for sewage treatment and its working method, and US patent US01075250B2 provides a water treatment process for removing suspended solids by air flotation.

[0004] In the above flotation scheme: the amount of reagent cannot be added as the amount of flocs in the oily wastewater changes; the impeller does not stir the oily wastewater and reagent evenly; the chain-driven skimming device is prone to malfunction, the skimming depth cannot be adjusted, and it is only a one-way oil storage tank, which can only skim oil in one direction; the dissolved air releaser is prone to clogging. Summary of the invention

[0005] Based on the above problems, the purpose of the present invention is to provide a reverse and co-current flotation process system, and the present invention adopts the following technical solutions:

[0006] The present invention provides a reverse and parallel flow flotation process system, comprising an air flotation device housing, wherein a dosing zone, a reverse contact zone, a parallel contact zone, a separation zone and a clear liquid zone are sequentially arranged from left to right in the air flotation device housing; the top of the reverse contact zone is connected to the dosing zone, the bottom of the reverse contact zone is connected to the parallel contact zone, the top of the separation zone is connected to the parallel contact zone, and the bottom of the separation zone is connected to the clear liquid zone;

[0007] A sewage inlet and a dosing port are provided at the bottom of the dosing area, and an electric valve is provided on the dosing port; an agitator and a fluorescence sensor are provided in the dosing area, and the fluorescence sensor is electrically connected to a first controller, and the first controller controls the opening and closing of the electric valve;

[0008] A reverse flow dissolved air releaser is arranged at the bottom of the reverse contact zone, and a parallel flow dissolved air releaser is arranged at the bottom of the parallel contact zone. The reverse flow dissolved air releaser and the parallel flow dissolved air releaser are both connected to a high-pressure dissolved air water device. A high-pressure nozzle is arranged above the reverse flow dissolved air releaser and the parallel flow dissolved air releaser, and the high-pressure nozzle is connected to the first water supply pipeline;

[0009] A reciprocating device is arranged above the top of the separation zone, and an oil skimming plate device that moves up and down is arranged on the reciprocating device; a left oil storage tank and a left pressure sensor are arranged on the left side of the top of the separation zone, and a right oil storage tank and a right pressure sensor are arranged on the right side of the top of the separation zone; the left pressure sensor and the right pressure sensor are both electrically connected to a second controller, and the second controller controls the oil skimming plate device to move up and down; an inclined plate device is arranged at the bottom of the separation zone;

[0010] A filter membrane device is arranged in the clear liquid area, and a clear water outlet is connected to the top of the clear liquid area.

[0011] Preferably, the agitator comprises a driving motor, a power output shaft of the driving motor is connected with a rotating shaft, the rotating shaft is provided with a plurality of fixing rods, and a rotatable impeller is provided at the end of the fixing rod.

[0012] Preferably, a protective cover is provided above the high-pressure nozzle.

[0013] Preferably, the clean water outlet is connected to an automatic discharge valve through a pipeline.

[0014] Preferably, the high-pressure dissolved air water device includes an air dissolving tank, which is connected to the air storage tank through an air channel, and the air dissolving tank is connected to the clean water outlet through a second water supply pipeline. A water supply pump is provided on the second water supply pipeline, and the air dissolving tank is connected to the counter-flow dissolved air releaser and the forward flow dissolved air releaser through a third water supply pipeline.

[0015] Preferably, the water inlet end of the first water supply pipeline is connected to the second water supply pipeline, and the connection position between the first water supply pipeline and the second water supply pipeline is located downstream of the water supply pump; an overflow valve is provided on the second water supply pipeline.

[0016] Preferably, the reciprocating device comprises a guide rail erected above the separation area, a moving trolley is provided on the guide rail, and limit switches are provided at both ends of the guide rail.

[0017] Preferably, the skimming plate device comprises a telescopic driving member, the telescopic driving member is arranged on the moving trolley, and the movable end of the telescopic driving member is connected to the skimming plate.

[0018] Preferably, the telescopic driving member is a cylinder.

[0019] Compared with the prior art, the beneficial technical effects of the present invention are:

[0020] The invention can automatically control the dosage of the medicine, fully stir the oily wastewater and the prepared coagulant and flocculant solution; the mobile trolley can filter out the floccules when moving left and right; at the same time, high-pressure water is sprayed from the high-pressure nozzle to the surface of the dissolved air releaser to avoid clogging of the dissolved air releaser. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] Figure 1 It is a structural schematic diagram of the reverse and co-current flotation process system of the present invention;

[0023] Figure 2 It is a schematic diagram of the main structure of the agitator of the present invention;

[0024] Figure 3 It is a top view structural schematic diagram of the impeller arrangement on the rotating shaft of the present invention;

[0025] Figure 4 It is a schematic diagram of the front view of the reciprocating device and the oil skimming plate device of the present invention;

[0026] Figure 5 It is a top view structural schematic diagram of the reciprocating device and the oil skimming plate device of the present invention.

[0027] Description of the reference numerals: 1. air flotation device housing; 101. dosing area; 102. reverse contact area; 103. parallel contact area; 104. separation area; 105. clear liquid area; 2. sewage inlet; 3. dosing port; 4. electric valve; 5. agitator; 501. drive motor; 502. rotating shaft; 503. fixing rod; 504. impeller; 6. fluorescent sensor; 7. first controller; 8. reverse flow dissolved air releaser; 9. parallel flow dissolved air releaser; 10. high pressure dissolved air water device; 1001. dissolved air tank; 1002. airway; 1003. gas storage tank; 10 04. Second water supply pipeline; 1005. Water supply pump; 11. High-pressure nozzle; 12. First water supply pipeline; 13. Reciprocating device; 1301. Guide rail; 1302. Moving trolley; 1303. Limit switch; 14. Skimmer device; 1401. Telescopic drive member; 1402. Skimmer; 15. Left oil storage tank; 16. Left pressure sensor; 17. Right oil storage tank; 18. Right pressure sensor; 19. Second controller; 20. Inclined plate device; 21. Filter membrane device; 22. Clean water outlet; 23. Protective cover; 24. Automatic discharge valve; 25. Overflow valve. DETAILED DESCRIPTION

[0028] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0029] like Figure 1 As shown, this embodiment discloses a reverse and parallel flow flotation process system, including an air flotation device box 1, in which a plurality of partitions are arranged from left to right, and the partitions divide the internal space of the air flotation device box 1 into a dosing area 101, a reverse contact area 102, a parallel contact area 103, a separation area 104 and a clear liquid area 105 from left to right; the top of the reverse contact area 102 is connected to the dosing area 101, the bottom of the reverse contact area 102 is connected to the parallel contact area 103, the top of the separation area 104 is connected to the parallel contact area 103, and the bottom of the separation area 104 is connected to the clear liquid area 105.

[0030] A sewage inlet 2 and a dosing port 3 are provided at the bottom of the dosing area 101, and an electric valve 4 is provided on the dosing port 3; an agitator 5 and a fluorescence sensor 6 are provided in the dosing area 101, and the fluorescence sensor 6 is electrically connected to the first controller 7, and the first controller 7 controls the opening and closing of the electric valve 4. A reverse flow dissolved air releaser 8 is provided at the bottom of the reverse contact area 102, and a parallel flow dissolved air releaser 9 is provided at the bottom of the contact area 103. The reverse flow dissolved air releaser 8 and the parallel flow dissolved air releaser 9 are both connected to a high-pressure dissolved air water device 10, and a high-pressure nozzle 11 is correspondingly provided above the reverse flow dissolved air releaser 8 and the parallel flow dissolved air releaser 9, and the high-pressure nozzle 11 is connected to the first water supply pipeline 12. A reciprocating device 13 is arranged above the top of the separation zone 104, and an oil skimming plate device 14 that moves up and down is arranged on the reciprocating device 13; a left oil storage tank 15 and a left pressure sensor 16 are arranged on the left side of the top of the separation zone 104, and a right oil storage tank 17 and a right pressure sensor 18 are arranged on the right side of the top of the separation zone 104; the left pressure sensor 16 and the right pressure sensor 18 are both electrically connected to the second controller 19, and the second controller 19 controls the oil skimming plate device 14 to move up and down; an inclined plate device 20 is arranged at the bottom of the separation zone 104. A filter membrane device 21 is arranged in the clear liquid zone 105, and a clear water outlet 22 is connected to the top of the clear liquid zone 105, and the clear water outlet 22 is connected to the automatic discharge valve 24 through a pipeline.

[0031] In this embodiment, a protective cover 23 is provided above the high-pressure nozzle 11 .

[0032] In this embodiment, the high-pressure dissolved air water device 10 includes an air dissolving tank 1001, which is connected to the air storage tank 1003 through an air channel 1002, and the air dissolving tank 1001 is connected to the clean water outlet 22 through a second water supply pipeline 1004. A water supply pump 1005 is provided on the second water supply pipeline 1004. The air dissolving tank 1001 is connected to the reverse flow dissolved air releaser 8 and the forward flow dissolved air releaser 9 through a third water supply pipeline 1006.

[0033] In this embodiment, the water inlet end of the first water supply pipeline 12 is connected to the second water supply pipeline 1004 , and the connection position between the first water supply pipeline 12 and the second water supply pipeline 1004 is located downstream of the water supply pump 1005 ; an overflow valve 25 is provided on the second water supply pipeline 1004 .

[0034] like Figure 2 and 3 As shown, in this embodiment, the agitator 5 includes a drive motor 501, which is installed on the air flotation device box 1. The power output shaft of the drive motor 501 is connected to a rotating shaft 502. The rotating shaft 502 is provided with a plurality of fixed rods 503, and a rotatable impeller 504 is provided at the end of the fixed rod 503.

[0035] like Figure 4 and5 As shown, in this embodiment, the reciprocating moving device 13 includes a guide rail 1301 erected above the separation area 104 , a moving trolley 1302 is arranged on the guide rail 1301 , and limit switches 1303 are arranged at both ends of the guide rail 1301 .

[0036] The skimming plate device 14 includes a telescopic driving member 1401, which is disposed on the moving vehicle 1302, and the movable end of the telescopic driving member 1401 is connected to the skimming plate 1402. The telescopic driving member 1401 may be a cylinder.

[0037] The processing of the present invention is as follows:

[0038] The oily wastewater enters the flotation device box 1 from the sewage inlet 2, and at the same time, the fluorescent sensor 6 sends a fluorescent signal to the flocs in the oily wastewater under ultraviolet excitation. The first controller 7 processes the fluorescent signals of different intensities and then sends a signal to the electric valve 4. The electric actuator in the electric valve 4 is actuated, and the valve is opened to a suitable position. At the same time, the configured coagulant and flocculant solution also enters the flotation device box 1 from the dosing port 3. The driving motor 501 of the stirrer 5 rotates, driving the rotating shaft 502 to rotate, and then the fixed rod 503 drives the impeller 504 to rotate to fully stir the oily wastewater and the configured coagulant and flocculant solution. The small-diameter flocs in the oily wastewater react with the coagulant and flocculant to form flocs with larger diameters.

[0039] Then the flocs enter the reverse contact zone 102 from the dosing zone 101, and the high-pressure dissolved air water device 10 passes high-pressure dissolved air into the reverse flow dissolved air releaser 8 and enters the flotation device box 1. Since the flotation device box 1 is in a low-pressure state, bubbles are released through the reverse flow dissolved air releaser 8. In the reverse contact zone 102, the bubbles and flocs collide and contact to form foam flocs with a density less than that of water. Under the impact of the water flow, the foam flocs and some flocs that are not combined with microbubbles enter through the bottom of the reverse contact zone 102 and move toward the contact zone 103. Similarly, after the flocs enter the contact zone 103, the high-pressure dissolved air water device 10 passes high-pressure dissolved air into the dissolved air releaser 9 and enters the flotation device box 1. Since the flotation device box 1 is in a low-pressure state, bubbles are released through the dissolved air releaser 9. In the contact zone 103, the bubbles and the flocs collide and contact to form foam flocs with a density less than that of water. The foam flocs and some flocs not combined with microbubbles pass through the top of the contact zone 103 and enter the separation zone 104.

[0040] In the reverse contact area 102 and the forward contact area 103, the microbubbles and some flocs not combined with the microbubbles adhere to each other and form flocs with a density less than that of water, and the formed flocs float to the water surface. If the dissolved air releaser (i.e., the reverse flow dissolved air releaser 8 or the forward flow dissolved air releaser 9) is blocked, the pressure in the water pipe between the dissolved air releaser and the water supply pump 1005 increases, the valve of the overflow valve 25 opens, and the high-pressure water flowing out of the water supply pump 1005 enters the high-pressure nozzle 11 from the overflow valve 25. The high-pressure water is sprayed from the high-pressure nozzle 11 to the surface of the dissolved air releaser (the reverse flow dissolved air releaser 8 or the forward flow dissolved air releaser 9), and the blocked flocs are cleaned up. Until the blocked flocs are cleared, the pressure in the water pipe between the dissolved air releaser (counter-flow dissolved air releaser 8 or parallel-flow dissolved air releaser 9) and the water supply pump 1005 is reduced to a normal state, the valve of the overflow valve 25 is closed, and the high-pressure water flowing out of the water supply pump 1005 no longer flows into the high-pressure nozzle 11 from the overflow valve 25.

[0041] In the upper part of the separation zone 104, a certain thickness of floccules are gathered. The left pressure sensor 16 is subjected to the pressure of the floccules and sends a signal to the second controller 19. The second controller 19 processes the signal and controls the telescopic drive member 1401 to move by switching the control valve group. The telescopic drive member 1401 moves down to a certain distance with the skimming plate 1402. The motor on the mobile trolley 1302 drives the mobile trolley 1302 to move along the guide rail 1301. When the mobile trolley 6 reaches the limit switch 1303 at the right end of the guide rail 1301, it stops. At the same time, the skimming plate 1402 pushes the floccules into the right oil storage tank 17, and the floccules in the water are removed. Similarly, the right pressure sensor 18 is subjected to the pressure of the floccules and sends a signal to the second controller 19. The second controller 19 processes the signal and controls the telescopic drive member 1401 to move by switching the control valve group. The telescopic drive member 1401 moves down to a certain distance with the skimming plate 1402. The motor on the mobile trolley 1302 drives the mobile trolley 1302 to move along the guide rail 1301. When the mobile trolley 6 reaches the limit switch 1303 at the left end of the guide rail 1301, it stops. At the same time, the skimming plate 1402 pushes the flocs into the left oil storage tank 15, and the flocs in the water are removed.

[0042] The water sample treated by air flotation enters the inclined plate device 20. According to the shallow pool principle, in the inclined plate device 20, since the density of the floccules is less than that of water, the floccules float up faster and float down faster. The floccules separated from the inclined plate device 20 are scraped off by the skimming plate 1402. The water filtered twice by the inclined plate device 20 enters the clear liquid area 105. The filter membrane device 21 further intercepts the trace floccules in the water and the floccules not combined with microbubbles, so that the oily wastewater meets the discharge requirements and flows out from the clear water outlet 22.

[0043] Part of the clean water flowing out of the clean water outlet 22 enters the water supply pump 1005, and the other part is discharged into the river through the automatic discharge valve 24. The clean water pressurized by the water supply pump 1005 enters the dissolved gas tank 1001, and methane is introduced from the gas storage tank 1003 to dissolve in the pressurized water, and then sent to the reverse flow dissolved gas releaser 8 and the forward flow dissolved gas releaser 9 through the third water supply pipeline 1006. The dissolved gas releaser releases bubbles, which are combined with flocs in the reverse contact area 102 and the forward contact area 103 respectively. According to the above process, the oily wastewater is treated repeatedly.

[0044] It should be noted that both the first controller 7 and the second controller 19 can be controlled by PLC.

[0045] Advantages or positive effects of the technical solution of the present invention:

[0046] (1) Automatically control the dosage. The fluorescence sensor 6 emits a fluorescence signal to the floccules in the oily wastewater under ultraviolet excitation. The first controller 7 processes the fluorescence signals of different intensities and then sends a signal to the electric valve 4. The electric actuator in the electric valve 4 is activated, and the valve opening is opened to a certain position. The precisely controlled amount of coagulant and flocculant enters the dosing area 101 from the dosing port 3.

[0047] (2) The agitator 5 uses a multi-impeller agitation mode, with low agitation intensity and uniform agitation. The prepared coagulant and flocculant solution also enters the dosing area 101 from the dosing port 3, and the driving motor 501 rotates, driving the rotating shaft 502 to rotate, and then the fixed rod 503 drives the small-diameter impeller 504 to rotate to fully agitate the oily wastewater and the prepared coagulant and flocculant solution. The small-diameter flocs in the oily wastewater react with the coagulant and flocculant to form larger-diameter flocs.

[0048] (3) The movable carriage 1302 can remove the floccules efficiently during the reciprocating movement (the movable carriage 1302 will not travel in vain). Due to the existence of the left oil storage tank 15 and the right oil storage tank 17, the movable carriage 1302 can filter out the floccules when moving left or right; the left pressure sensor 16 and the right pressure sensor 18 detect the thickness change of the floccules, and the telescopic driving member 1401 adjusts the corresponding change, so that the skimmer plate 1402 is at a suitable height to scrape and filter the floccules.

[0049] (4) Bubbles are ensured to be continuously and stably introduced, and the contact and adhesion effect between bubbles and flocs is good, and the dissolved air releaser is not easy to be blocked. If the reverse flow dissolved air releaser 8 or the parallel flow dissolved air releaser 9 is blocked by flocs, the pressure in the water pipe between the water supply pump 1005 increases, the valve of the overflow valve 25 opens, and the high-pressure water flowing out of the water supply pump 1005 enters the high-pressure nozzle 11 from the overflow valve 25. The high-pressure water is sprayed from the high-pressure nozzle 11 to the surface of the reverse flow dissolved air releaser 8 or the parallel flow dissolved air releaser 9, and the blocked flocs are cleaned up.

[0050] 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 reverse co-current flotation process system, characterized in that: The air flotation device comprises an air flotation device housing (1), wherein the air flotation device housing (1) is provided with a drug adding area (101), a reverse contact area (102), a forward contact area (103), a separation area (104) and a clear liquid area (105) in sequence from left to right; the top of the reverse contact area (102) is connected to the drug adding area (101), the bottom of the reverse contact area (102) is connected to the forward contact area (103), the top of the separation area (104) is connected to the forward contact area (103), and the bottom of the separation area (104) is connected to the clear liquid area (105); A sewage inlet (2) and a dosing port (3) are provided at the bottom of the dosing area (101), and an electric valve (4) is provided on the dosing port (3); an agitator (5) and a fluorescence sensor (6) are provided in the dosing area (101), and the fluorescence sensor (6) is electrically connected to a first controller (7), and the first controller (7) controls the opening and closing of the electric valve (4); A reverse flow dissolved air releaser (8) is arranged at the bottom of the reverse contact zone (102), and a parallel flow dissolved air releaser (9) is arranged at the bottom of the parallel contact zone (103). The reverse flow dissolved air releaser (8) and the parallel flow dissolved air releaser (9) are both connected to a high-pressure dissolved air water device (10). High-pressure nozzles (11) are arranged above the reverse flow dissolved air releaser (8) and the parallel flow dissolved air releaser (9), respectively. The high-pressure nozzles (11) are connected to a first water supply pipeline (12). A protective cover (23) is arranged above the high-pressure nozzles (11), and high-pressure water is sprayed from the high-pressure nozzles (11) onto the surface of the dissolved air releaser. A reciprocating device (13) is arranged above the top of the separation zone (104), and an oil skimming plate device (14) that moves up and down is arranged on the reciprocating device (13); a left oil storage tank (15) and a left pressure sensor (16) are arranged on the left side of the top of the separation zone (104), and a right oil storage tank (17) and a right pressure sensor (18) are arranged on the right side of the top of the separation zone (104); the left pressure sensor (16) and the right pressure sensor (18) are both electrically connected to a second controller (19), and the second controller (19) controls the oil skimming plate device (14) to move up and down; an inclined plate device (20) is arranged at the bottom of the separation zone (104); A filter membrane device (21) is provided in the clear liquid area (105), and a clear water outlet (22) is connected to the top of the clear liquid area (105).

2. The reverse co-current flotation process system according to claim 1, characterized in that: The stirrer (5) comprises a driving motor (501), wherein a power output shaft of the driving motor (501) is connected to a rotating shaft (502), wherein the rotating shaft (502) is provided with a plurality of fixing rods (503), and a rotatable impeller (504) is provided at the end of each fixing rod (503).

3. The reverse co-current flotation process system according to claim 1, characterized in that: The clean water outlet (22) is connected to an automatic discharge valve (24) via a pipeline.

4. The reverse co-current flotation process system according to claim 1, characterized in that: The high-pressure dissolved air water device (10) comprises an air dissolving tank (1001), the air dissolving tank (1001) being connected to an air storage tank (1003) via an air passage (1002), the air dissolving tank (1001) being connected to the clean water outlet (22) via a second water supply pipeline (1004), a water supply pump (1005) being provided on the second water supply pipeline (1004), and the air dissolving tank (1001) being connected to the counter-flow dissolved air releaser (8) and the counter-flow dissolved air releaser (9) via a third water supply pipeline (1006).

5. The reverse co-current flotation process system according to claim 4, characterized in that: The water inlet end of the first water supply pipeline (12) is connected to the second water supply pipeline (1004), and the connection position between the first water supply pipeline (12) and the second water supply pipeline (1004) is located downstream of the water supply pump (1005); and an overflow valve (25) is provided on the second water supply pipeline (1004).

6. The reverse co-current flotation process system according to claim 1, characterized in that: The reciprocating device (13) comprises a guide rail (1301) mounted above the separation area (104), a moving trolley (1302) being arranged on the guide rail (1301), and limit switches (1303) being arranged at both ends of the guide rail (1301).

7. The reverse co-current flotation process system according to claim 6, characterized in that: The oil skimming plate device (14) comprises a telescopic driving member (1401), wherein the telescopic driving member (1401) is arranged on the movable vehicle (1302), and the movable end of the telescopic driving member (1401) is connected to the oil skimming plate (1402).

8. The reverse co-current flotation process system according to claim 7, characterized in that: The telescopic driving member (1401) is a cylinder.

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