CN219603301U - Air-float filtering skid-mounted device - Google Patents

Abstract

The utility model provides an air floatation filtering skid-mounted device which comprises an aeration tank, a slag scraping tank and a water passing buffer tank; the clean water from the water passing buffer tank and the compressed air are mixed by the air dissolving equipment arranged on the aeration tank and flow into the slag scraping tank; the flocculent floaters which float on the liquid surface of the slag scraping tank after aeration are scraped into an oil stain tank by slag scraping equipment arranged in the slag scraping tank; introducing clear water at the bottom of the slag scraping pool into the water passing buffer pool through a water passing adjusting device arranged in the water passing buffer pool; and then the treated clean water is conveyed to subsequent filtering equipment. Solves the problems of high cost, large occupied area and low guarantee rate of the water quality treatment effect of the existing equipment.

Description

Air-float filtering skid-mounted device

Technical Field

The utility model relates to the field of petrochemical industry, in particular to an air floatation filtering skid-mounted device.

Background

In the field of oil-containing sewage treatment of oil fields, the traditional air floatation filtering equipment is extremely inconvenient to use, large in occupied area, high in cost and low in water quality treatment effect guarantee rate, and the technical progress of oil field produced water treatment is seriously affected.

Disclosure of Invention

The utility model mainly aims to provide an air floatation filtering skid-mounted device which at least solves the problems of inconvenient use, large occupied area, high cost and low guarantee rate of water quality treatment effect of the traditional air floatation filtering skid block.

In order to achieve the above object, the present utility model provides an air-floating filtering skid-mounted device, comprising: an aeration tank, a slag scraping tank and a water passing buffer tank; the aeration tank is communicated with a water source to be treated, the water passing buffer tank is communicated with subsequent filtering equipment, and the slag scraping tank is arranged between the aeration tank and the water passing buffer tank and is mutually adjacent; a return pipe is arranged between the aeration tank and the water passing buffer tank; a water collecting and passing pipe is arranged between the slag scraping pool and the water passing buffer pool; the aeration tank is provided with an air dissolving device which is used for mixing clear water from the water passing buffer tank with compressed air and then filling the mixture into the aeration tank; the water in the aeration tank after aeration automatically flows into the slag scraping tank; the slag scraping device is used for scraping flocculent floats floating on the liquid surface of the slag scraping tank into the oil stain groove after aeration; the water flowing buffer pool is internally provided with water flowing regulating equipment, the water diversion end of the water flowing regulating equipment extends to the bottom of the slag scraping pool, the water flowing regulating equipment is used for introducing clear water at the bottom of the slag scraping pool into the water flowing buffer pool, and the water flowing buffer pool is used for conveying the treated clear water to subsequent filtering equipment.

Further, the gas dissolving apparatus includes: the device comprises a dissolved air tank, an air compressor, a dissolved air release pipeline and a water pump; one end of the return pipe is communicated with the water passing buffer tank; the other end of the return pipe is communicated with a water inlet of the water pump; the water outlet of the water pump is communicated with the water inlet of the dissolved air tank, and the water pump is used for pressurizing and conveying clear water in the water passing buffer tank into the dissolved air tank; an air inlet of the dissolved air tank is connected with an air outlet of the air compressor so as to mix high-pressure air generated by the air compressor with clear water generated by the water buffer pool to form gas-dissolved water; one end of the dissolved air release pipeline is connected with the water outlet of the dissolved air tank, and the other end of the dissolved air release pipeline extends into the aeration tank to discharge the dissolved air into the aeration tank.

Further, the dissolved gas releasing pipe includes: a main dissolved gas pipe, a plurality of branch dissolved gas pipes and a plurality of dissolved gas releasers; the water inlet of the gas dissolving main pipe is connected with the water outlet of the gas dissolving tank, and the water outlet of the gas dissolving main pipe is connected with the water inlets of the plurality of gas dissolving branch pipes so as to convey gas dissolving water to the plurality of gas dissolving branch pipes; the plurality of dissolved air releasers are positioned in the aeration tank, and the water outlets of the plurality of dissolved air branch pipes are correspondingly connected with the plurality of dissolved air releasers one by one so as to release the dissolved air into the aeration tank through the plurality of dissolved air releasers.

Further, a spray head structure is arranged on the dissolved air releaser, the spray head structure is of a TV type disc structure, and dense small holes are formed in the circumferential direction of the spray head structure.

Further, the slag scraping device includes: the chain comprises a first driving mechanism, a chain group, a plurality of scrapers, a driving shaft and a driven shaft; the first driving mechanism is arranged above one side of the slag scraping pool; the driving shaft and the driven shaft are rotatably arranged on the slag scraping pool along the transverse direction of the slag scraping pool, the driving shaft and the driven shaft are spaced at a preset distance along the longitudinal direction of the slag scraping pool, and the first driving mechanism is connected with the driving shaft; the chain group is arranged on the driving shaft and the driven shaft; a plurality of scrapers are arranged on the chain group along the transverse direction of the slag scraping pool; the first driving mechanism drives the plurality of scrapers to circularly move along the longitudinal direction of the slag scraping pool through the driving shaft, the driven shaft and the chain group so as to scrape flocculent floaters on the liquid surface of the slag scraping pool.

Further, the first driving mechanism includes: horizontal speed reducer, small sprocket and large sprocket; the horizontal speed reducer is connected with the small chain wheel to transmit power; the small chain wheel is connected with the large chain wheel to transmit power; the small chain wheel is connected with a driving shaft, and the driving shaft is connected with a driven shaft through a chain group to drive a plurality of scraping plates to circularly move.

Further, the chain set includes: the chain, the connecting fixing plate, the clamping plate and the chain backing plate; the chain backing plate is arranged outside the chain and used for connecting the chain; the connecting fixing plate and the clamping plate are arranged on the chain backing plate; the scraping plate is arranged between the connecting fixing plate and the clamping plate.

Further, the water passing adjusting apparatus includes: the device comprises an adjusting plug, a water flow adjusting cylinder body and a water flow adjusting driving mechanism; the adjusting plug is connected with the upper port of the water flow adjusting cylinder in an opening or closing way, the lower port of the water flow adjusting cylinder is connected with a water collecting and water passing pipe, and the water collecting and water passing pipe extends into the slag scraping pool; the water flow adjusting driving mechanism controls the adjusting plug to move up and down along the vertical direction so as to open or close the upper port of the water flow adjusting cylinder body and further control the water flow entering the water flow buffering pool through the water flow adjusting cylinder body.

Further, a plurality of water passing holes are formed in the pipe wall of the water collecting and passing pipe, and the water passing holes are formed downwards at an included angle of 45 degrees with the horizontal.

Further, the water-passing adjusting driving mechanism includes: the screw rod lifter is connected with the screw rod; the lower end of the screw rod is fixedly connected with the adjusting plug; wherein, screw elevator passes through screw drive and adjusts stopper along vertical direction motion.

The utility model relates to an air floatation filtering skid-mounted device, which comprises an aeration tank, a slag scraping tank and a water passing buffer tank; the aeration tank is communicated with a water source to be treated, the water passing buffer tank is communicated with subsequent filtering equipment, and the slag scraping tank is arranged between the aeration tank and the water passing buffer tank and is mutually adjacent; a return pipe is arranged between the aeration tank and the water passing buffer tank; a water collecting and passing pipe is arranged between the slag scraping pool and the water passing buffer pool; the aeration tank is provided with an air dissolving device which is used for mixing clear water from the water passing buffer tank with compressed air and then filling the mixture into the aeration tank; the water in the aeration tank after aeration automatically flows into the slag scraping tank; the slag scraping device is used for scraping flocculent floats floating on the liquid surface of the slag scraping tank into the oil stain groove after aeration; the water flowing buffer pool is internally provided with water flowing regulating equipment, the water diversion end of the water flowing regulating equipment extends to the bottom of the slag scraping pool, the water flowing regulating equipment is used for introducing clear water at the bottom of the slag scraping pool into the water flowing buffer pool, and the water flowing buffer pool is used for conveying the treated clear water to subsequent filtering equipment. Therefore, the oily sewage can be efficiently treated, and the problems of extremely inconvenient use, large occupied area, high cost and low guarantee rate of water quality treatment effect of the traditional air floatation filtering pry block are solved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

FIG. 1 is a side elevational view in general of an air floatation filter skid in accordance with an alternative embodiment of the present utility model;

FIG. 2 is a schematic top view of an alternative air floatation filter skid in accordance with an embodiment of the present utility model;

FIG. 3 is a schematic view showing an alternative main structure of an air floatation filter skid according to an embodiment of the present utility model;

FIG. 4 is a schematic view of a gas dissolving device of an alternative air flotation filter skid according to an embodiment of the present utility model;

fig. 5 is an enlarged schematic view of a chain set according to an alternative embodiment of the present utility model.

Wherein the above figures include the following reference numerals:

10. an aeration tank; 20. a slag scraping pool; 21. an oil stain tank; 30. a water passing buffer pool; 40. a gas dissolving device; 41. a dissolved air tank; 42. an air compressor; 43. a dissolved gas release pipe; 431. a gas dissolving main pipe; 432. a dissolved air branch pipe; 433. a dissolved air releaser; 44. a water pump; 50. slag scraping equipment; 51. a first driving mechanism; 511. a horizontal speed reducer; 512. a small sprocket; 513. a large sprocket; 52. a chain set; 521. a chain; 522. connecting a fixing plate; 523. a clamping plate; 524. a chain backing plate; 53. a scraper; 54. a driving shaft; 55. a driven shaft; 60. a water passing adjustment device; 61. an adjusting plug; 62. a water passing adjusting cylinder; 63. a water-passing adjusting driving mechanism; 631. a screw elevator; 632. a screw rod; 70. a return pipe; 80. a water collecting and passing pipe; 81. a main water pipe; 82. and a secondary water pipe.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

The utility model provides an air floatation filtering skid-mounted device, which is shown in fig. 1 to 4, and comprises an aeration tank 10, a slag scraping tank 20 and a water buffer tank 30; the aeration tank 10 is communicated with a water source to be treated, the water passing buffer tank 30 is communicated with subsequent filtering equipment, and the slag scraping tank 20 is arranged between the aeration tank 10 and the water passing buffer tank 30 and is mutually adjacent; a return pipe 70 is arranged between the aeration tank 10 and the water passing buffer tank 30; a water collecting and passing pipe 80 is arranged between the slag scraping pool 20 and the water passing buffer pool 30; the aeration tank 10 is provided with a gas dissolving device 40, and the gas dissolving device 40 is used for mixing clean water from the water passing buffer tank 30 with compressed air and then filling the mixture into the aeration tank 10; the aerated water in the aeration tank 10 automatically flows into the slag scraping tank 20; the slag scraping device 50 is arranged on the slag scraping pool 20, an oil stain groove 21 is arranged on the side of the slag scraping pool 20, and the slag scraping device 50 is used for scraping flocculent floaters which float on the liquid surface of the slag scraping pool 20 after aeration into the oil stain groove 21; the water buffer tank 30 is internally provided with a water flow regulating device 60, the water diversion end of the water flow regulating device 60 extends to the bottom of the slag scraping tank 20, the water flow regulating device 60 is used for introducing clear water at the bottom of the slag scraping tank 20 into the water flow buffer tank 30, and the water flow buffer tank 30 is used for conveying the treated clear water to a subsequent filtering device. Therefore, the oily sewage can be efficiently treated, and the problems that the traditional air floatation filtering pry block is extremely inconvenient to use, large in occupied area, high in cost and low in water quality treatment effect guarantee rate are solved.

According to the air floatation filtering skid-mounted device, the water flow process can be increased through three-stage air floatation, so that the hydraulic retention time is prolonged, and the air floatation impurities are removed through flocculation, coagulation, aeration and precipitation, so that the oil-water separation is realized; aeration involves two methods of bubble generation: the jet flow method or the dissolved air flotation firstly pressurizes the gas so as to increase the solubility of the gas in water, and then releases the gas through a dissolved air release pipeline 43 placed in low-pressure water so as to separate out bubbles in the low-pressure water; in the three-stage air floatation process, the water quality is monitored, and the control valve predicts the occurrence of bubbles.

In practice, as shown in fig. 2 to 4, the dissolved air apparatus 40 includes a dissolved air tank 41, an air compressor 42, a dissolved air release pipe 43, and a water pump 44; one end of the return pipe 70 extends to the bottom of the water buffer tank 30 so as to communicate with the water buffer tank 30; the other end of the return pipe 70 is communicated with the water inlet of the water pump 44; the water outlet of the water pump 44 is communicated with the water inlet of the dissolved air tank 41, and the water pump 44 is used for pressurizing and conveying clear water at the bottom of the water buffer pool 30 into the dissolved air tank 41; the air inlet of the dissolved air tank 41 is connected with the air outlet of the air compressor 42 to mix the high-pressure air generated by the air compressor 42 with the clean water generated by the water buffer tank 30 to form air-dissolved water; one end of the dissolved air release pipe 43 is connected with the water outlet of the dissolved air tank 41, and the other end of the dissolved air release pipe 43 extends into the aeration tank 10 so as to discharge the dissolved air into the aeration tank 10 for aeration. In practical design, the dissolved air tank 41 adopts a unique jet structure, a floating ball liquid level switch is arranged to adjust the air quantity, a wave board is arranged in the dissolved air tank 41 to keep the internal liquid level stable, and the dissolved air tank 41 is also provided with an emptying valve, a safety valve, a pressure gauge and other devices to ensure the safe operation of the dissolved air tank 41.

Further, the dissolved gas releasing pipe 43 includes a dissolved gas mother pipe 431, a plurality of dissolved gas branch pipes 432, and a plurality of dissolved gas releases 433; the water inlet of the gas dissolving master pipe 431 is connected with the water outlet of the gas dissolving tank 41, and the water outlet of the gas dissolving master pipe 431 is connected with the water inlets of the plurality of gas dissolving branch pipes 432 so as to convey gas dissolving water to the plurality of gas dissolving branch pipes 432; the plurality of dissolved air branch pipes 432 are uniformly arranged at intervals along the width direction of the aeration tank 10 and extend into the aeration tank 10; the plurality of dissolved air releasers 433 are positioned in the aeration tank 10, and water outlets of the plurality of dissolved air branch pipes 432 are connected with the plurality of dissolved air releasers 433 in a one-to-one correspondence manner so as to release the dissolved air and water into the aeration tank 10 through the plurality of dissolved air releasers 433. Optionally, a nozzle structure is arranged on the dissolved air releaser 433, the nozzle structure is a TV-type disc structure, and dense small holes are formed in the circumferential direction of the nozzle structure; the gas is fully burst downwards, the contact surface is larger, the aeration effect is better, and the diameter and the concentration of bubbles are ensured.

Further, the slag scraping apparatus 50 includes a first driving mechanism 51, a chain group 52, a plurality of scrapers 53, a driving shaft 54, and a driven shaft 55; the first driving mechanism 51 is installed above one side of the slag scraping bath 20; the driving shaft 54 and the driven shaft 55 are rotatably installed on the slag scraping tank 20 along the transverse direction of the slag scraping tank 20, and the driving shaft 54 and the driven shaft 55 are spaced a preset distance along the longitudinal direction of the slag scraping tank 20, and the first driving mechanism 51 is connected with the driving shaft 54; the chain group 52 is arranged on the driving shaft 54 and the driven shaft 55 to realize power transmission between the driving shaft 54 and the remaining driven shafts 55; a plurality of scrapers 53 are mounted on the chain block 52 in the lateral direction of the scraping bath 20; specifically, as shown in fig. 5, the chain set 52 includes a chain 521, a connection fixing plate 522, a clamping plate 523, and a chain shim plate 524; a chain pad 524 is installed outside the chain 521 for connecting the chain 521; the connecting fixing plate 522 and the clamping plate 523 are mounted on the chain pad 524; the scraper 53 is installed between the connection fixing plate 522 and the clamp plate 523; the first driving mechanism 51 includes a horizontal speed reducer 511, a small sprocket 512, and a large sprocket 513; the horizontal speed reducer 511 is connected with a small sprocket 512 to transmit power; the small sprocket 512 is connected to the large sprocket 513 to transmit power; the small chain wheel 512 is connected with the driving shaft 54 to drive the driving shaft 54 to rotate, and the driving shaft 54 is connected with the driven shaft 55 through the chain group 52 to drive the plurality of scrapers 53 to circularly move along the longitudinal direction of the scraping tank 20 so as to scrape flocculent floating objects on the liquid surface of the scraping tank 20

Further, the water passing adjusting apparatus 60 includes an adjusting plug 61, a water passing adjusting cylinder 62, and a water passing adjusting driving mechanism 63; the water passing adjusting cylinder 62 is a cylindrical cylinder arranged in the water passing buffer tank 30 along the vertical direction, the lower port of the water passing adjusting cylinder 62 is connected with a water collecting and passing pipe 80, the water collecting and passing pipe 80 comprises a main water passing pipe 81 and auxiliary water passing pipes 82, the main water passing pipe 81 is arranged at the bottom of the water passing buffer tank 30 along the transverse direction of the water passing buffer tank 30, the number of the auxiliary water passing pipes 82 is multiple, one ends of the auxiliary water passing pipes 82 are mutually communicated with the main water passing pipe 81, and the other ends of the auxiliary water passing pipes 82 extend into the slag scraping tank 20; a plurality of water holes are formed in the pipe wall of each auxiliary water passing pipe 82, and the water holes are downwards formed at an included angle of 45 degrees with the horizontal to prevent floccules from blocking the water holes; the clear water after precipitation in the slag scraping pool 20 enters the auxiliary water passing pipe 82 through the water passing hole and enters the water passing adjusting cylinder 62 through the main water passing pipe 81; the water flow adjusting cylinder 62, the water collecting and passing pipe 80 and the slag scraping bath 20 correspond to a communicating vessel for guiding water flow into the water buffer bath 30.

The adjustment plug 61 and the upper port of the water adjustment cylinder 62 are connected to be openable or closable with each other, and the water adjustment driving mechanism 63 controls the flow rate of water entering the water buffer tank 30 through the water adjustment cylinder 62 by controlling the lifting movement of the adjustment plug 61 in the vertical direction to open or close the upper port of the water adjustment cylinder 62. Specifically, the water passing adjustment driving mechanism 63 includes a screw lifter 631 and a screw 632, the screw lifter 631 being connected to the screw 632; the lower end of the screw rod 632 is fixedly connected with the adjusting plug 61; the screw lifter 631 drives the adjustment plug 61 to move in the vertical direction through the screw 632.

In a specific working process, PAC, PAM, demulsifier, scale inhibitor, etc. Guan Yaoji are added to the aeration tank 10 first. The air dissolving apparatus 40 starts to operate, pressurized reflux of the clean water of the water buffer tank 30 is performed, jet flow of the reflux water in the air dissolving tank 41 is mixed with compressed air supplied from the air compressor 42, and then the mixture enters the aeration tank 10 through the air dissolving release pipe 43, and aeration is performed via the air dissolving release 433. The micro bubbles generated by aeration float the foam-like and floccule suspended matters generated under the action of the medicament, when the liquid level in the air float reaches a preset position, the slag scraping device 50 starts to work, and the foam-like and floccule floating on the liquid level is scraped into the oil stain tank 21 for discharging. In the aeration system, a dissolved air release pipeline 43 is connected with a dissolved air tank 41, the main body of the dissolved air tank is of a disc type structure, short pipes are distributed on the circumference of the dissolved air tank, and the short pipes comprise tiny holes; the outlet of the aeration tank 10 is connected with a slag scraping tank 20, and the slag scraping tank 20 comprises an oil stain tank 21 and slag discharging holes, so that foam-shaped floccules can be discharged; the clean water precipitated in the skimming bath 20 enters the water buffer bath 30 via the water collecting and passing pipe 80 and the water adjusting device 60 and is finally transferred to the subsequent filtering device. The gas dissolving equipment 40 is gradually mixed with sewage to be treated in 3 stages, and the first-stage gas dissolving water enters the pipeline to be treated through a pipeline at an angle of 90 degrees and is directly mixed; the second stage adopts a dissolved air tank 41 to form a bubble wall on the cross section of the water tank to intercept micro flocs; and in the third stage, lifting bubbles are formed through a belt type aeration pipe, so that large flocs are prevented from settling. After sufficient aeration, flotation, and sedimentation, the clean water enters the water buffer tank 30 through the water passing adjustment device 60, and enters the filtration system through the filtration pump.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. An air supporting filters sled dress device, characterized in that includes:

an aeration tank (10), a slag scraping tank (20) and a water passing buffer tank (30);

the aeration tank (10) is communicated with a water source to be treated, the water passing buffer tank (30) is communicated with subsequent filtering equipment, and the slag scraping tank (20) is arranged between the aeration tank (10) and the water passing buffer tank (30) and is mutually adjacent; a return pipe (70) is arranged between the aeration tank (10) and the water passing buffer tank (30); a water collecting and passing pipe (80) is arranged between the slag scraping pool (20) and the water passing buffer pool (30); the aeration tank (10) is provided with an air dissolving device (40), and the air dissolving device (40) is used for mixing clear water from the water passing buffer tank (30) with compressed air and then filling the mixture into the aeration tank (10); the aerated water in the aeration tank (10) flows into the slag scraping tank (20) from the bottom; the slag scraping device (50) is arranged on the slag scraping pool (20), an oil stain groove (21) is formed in the side of the slag scraping pool (20), and the slag scraping device (50) is used for scraping flocculent floaters which float on the liquid surface of the slag scraping pool (20) after aeration into the oil stain groove (21); be provided with in the water buffer tank (30) and cross water conditioning equipment (60), the diversion end that crosses water conditioning equipment (60) extends to scrape slag pool (20) bottom, cross water conditioning equipment (60) be used for with it introduces to scrape clear water of slag pool (20) bottom cross water buffer tank (30), cross water buffer tank (30) be used for with the clear water after the processing carry to follow-up filtration equipment in.

2. The air flotation filtration skid as claimed in claim 1, wherein said air dissolving apparatus (40) comprises:

a dissolved air tank (41), an air compressor (42), a dissolved air release pipeline (43) and a water pump (44);

one end of the return pipe (70) is communicated with the water passing buffer tank (30); the other end of the return pipe (70) is communicated with a water inlet of the water pump (44); the water outlet of the water pump (44) is communicated with the water inlet of the dissolved air tank (41), and the water pump (44) is used for conveying the clean water of the water passing buffer tank (30) into the dissolved air tank (41) in a pressurized mode; an air inlet of the dissolved air tank (41) is connected with an air outlet of the air compressor (42) so as to mix high-pressure air generated by the air compressor (42) with clean water generated by the water buffer tank (30) to form air-dissolved water; one end of the dissolved air release pipeline (43) is connected with the water outlet of the dissolved air tank (41), and the other end of the dissolved air release pipeline (43) extends into the aeration tank (10) to discharge the dissolved air into the aeration tank (10).

3. The air flotation filtration skid as claimed in claim 2, wherein said dissolved air release duct (43) comprises:

a main dissolved gas pipe (431), a plurality of branch dissolved gas pipes (432) and a plurality of dissolved gas releasers (433);

the water inlet of the gas dissolving main pipe (431) is connected with the water outlet of the gas dissolving tank (41), and the water outlet of the gas dissolving main pipe (431) is connected with the water inlets of the plurality of gas dissolving branch pipes (432) so as to convey gas dissolving water to the plurality of gas dissolving branch pipes (432);

the plurality of dissolved air releasers (433) are positioned in the aeration tank (10), and the water outlets of the plurality of dissolved air branch pipes (432) are connected with the plurality of dissolved air releasers (433) in a one-to-one correspondence manner so as to release the dissolved air into the aeration tank (10) through the plurality of dissolved air releasers (433).

4. The air floatation filtering skid-mounted device according to claim 3, wherein the dissolved air releaser (433) is provided with a nozzle structure, the nozzle structure is a TV-type disc structure, and dense small holes are formed in the circumferential direction of the nozzle structure.

5. The air flotation filtration skid as claimed in claim 1, wherein the slag scraping device (50) comprises:

a first driving mechanism (51), a chain group (52), a plurality of scrapers (53), a driving shaft (54) and a driven shaft (55);

the first driving mechanism (51) is arranged above one side of the slag scraping pool (20); the driving shaft (54) and the driven shaft (55) are rotatably arranged on the slag scraping pool (20) along the transverse direction of the slag scraping pool (20), the driving shaft (54) and the driven shaft (55) are separated by a preset distance along the longitudinal direction of the slag scraping pool (20), and the first driving mechanism (51) is connected with the driving shaft (54); the chain group (52) is arranged on the driving shaft (54) and the driven shaft (55); a plurality of scrapers (53) are mounted on the chain group (52) along the transverse direction of the slag scraping bath (20);

the first driving mechanism (51) drives a plurality of scrapers (53) to circularly move along the longitudinal direction of the scraping tank (20) through the driving shaft (54), the driven shaft (55) and the chain group (52) so as to scrape flocculent floats on the liquid surface of the scraping tank (20).

6. The air floatation filtering skid as set forth in claim 5, wherein the first drive mechanism (51) includes:

a horizontal speed reducer (511), a small sprocket (512) and a large sprocket (513);

the horizontal speed reducer (511) is connected with the small chain wheel (512) to transmit power; the small sprocket (512) is connected with the large sprocket (513) to transmit power; the small chain wheel (512) is connected with the driving shaft (54), and the driving shaft (54) is connected with the driven shaft (55) through a chain group (52) to drive a plurality of scraping plates (53) to circularly move.

7. The air floatation filtering skid as set forth in claim 5, wherein the chain set (52) includes:

a chain (521), a connecting and fixing plate (522), a clamping plate (523) and a chain backing plate (524);

the chain pad (524) is arranged outside the chain (521) and is used for connecting the chain (521); the connecting fixing plate (522) and the clamping plate (523) are mounted on the chain backing plate (524); the scraper (53) is mounted between the connection fixing plate (522) and the clamping plate (523).

8. The air floatation filtering skid as set forth in claim 1, wherein the water passing adjustment device (60) includes:

an adjusting plug (61), a water adjusting cylinder (62) and a water adjusting driving mechanism (63); the adjusting plug (61) and the upper port of the water flow adjusting cylinder (62) can be mutually opened or closed, the lower port of the water flow adjusting cylinder (62) is connected with a water collecting and passing pipe (80), and the water collecting and passing pipe (80) extends into the slag scraping pool (20); the water flow adjusting driving mechanism (63) is used for controlling the water flow entering the water flow buffer tank (30) through the water flow adjusting cylinder (62) by controlling the adjusting plug (61) to move up and down along the vertical direction so as to open or close the upper port of the water flow adjusting cylinder (62).

9. The air flotation filtration skid-mounted device according to claim 8, wherein a plurality of water passing holes are formed in the pipe wall of the water collecting and passing pipe (80), and the water passing holes are formed downwards at an included angle of 45 degrees with the horizontal.

10. The air flotation filtration skid as claimed in claim 8, wherein the water adjustment drive mechanism (63) comprises:

a screw lifter (631) and a screw (632), the screw lifter (631) being connected to the screw (632); the lower end of the screw rod (632) is fixedly connected with the adjusting plug (61);

wherein the screw lifter (631) drives the adjustment plug (61) to move in the vertical direction through the screw (632).