Movable dissolved air flotation device

Abstract

The utility model relates to a movable dissolved air flotation device, which belongs to the field of sewage treatment and comprises a flotation box, an air dissolving device and a carrying plate trailer used for carrying the flotation box and the air dissolving device, a mounting frame is arranged at the top end of the flotation box, an air dissolving pipe extending into the flotation box is arranged on the mounting frame, a bubble distributor is arranged at the bottom end of the air dissolving pipe, and the bubble distributor is connected with the air dissolving device. And an embedded plate matched with the bubble distributor is arranged on the inner wall of the flotation box. According to the movable dissolved air flotation device, through cooperation of the bubble distributor and the embedded plate, the bubble distributor can generate more dense tiny bubbles, so that the chance that impurities are stuck by the bubbles is increased, meanwhile, due to the fact that the bubble distributor is located on the inner side of the embedded plate, sewage can be directly located above the bubble distributor after passing through the embedded plate, and the bubble distributor is not prone to falling off. Bubbles generated by the bubble distributor can float from the lower portion of sewage, so that the bubbles generated by the bubble distributor can be more easily adhered to impurities, and then the impurity flotation effect is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a mobile dissolved air flotation device. Background Art

[0002] Dissolved air flotation is a device used for solid-liquid separation and wastewater treatment. It is mainly used to treat wastewater containing suspended matter, grease, particulate matter, etc. Dissolved air flotation is a physical and chemical treatment method that generates tiny bubbles by injecting gas (usually air) into the water, causing the suspended matter to attach to the bubbles and float to the water surface, thereby achieving the purpose of solid-liquid separation.

[0003] At present, when the dissolved air flotation device is in use, the sewage will first enter the reaction zone, and flocculants and coagulants are added to the reaction zone to flocculate the sewage. The flocculated sewage enters the flotation zone, and the sewage generally flows out from the side where the bubbles are generated. The sewage at the edge of the flotation tank and the sewage in the middle of the flotation tank can be exposed to a large difference in the number of bubbles, resulting in poor flotation effect. Therefore, a mobile dissolved air flotation device is proposed to solve the above problems. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a mobile dissolved air flotation device, which has the advantages of better flotation effect and solves the problem of flotation effect.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a mobile dissolved air flotation device, comprising a flotation box, a dissolved air device and a carrier truck for towing the flotation box and the dissolved air device, characterized in that: a mounting frame is provided at the top of the flotation box, a dissolved air pipe extending into the flotation box is provided above the mounting frame, a bubble distributor is provided at the bottom of the dissolved air pipe, an embedded plate matching the bubble distributor is provided on the inner wall of the flotation box, and a foam scraper is provided at the top of the flotation box for scraping off foam.

[0006] The bubble distributor includes an air outlet cover plate and a motor, the motor is fixedly installed on the top of the mounting frame, an axle is fixedly connected to the output shaft of the motor, a three-pronged paddle is threadedly connected to the bottom of the axle, cut-off scrapers are fixed on the left and right sides of the top of the three-pronged paddle, the air outlet cover plate is fixedly installed on the bottom of the dissolved air pipe, the internal thread of the air outlet cover plate is connected to the dissolved air distribution box, and the three-pronged paddle is movably connected to the inside of the dissolved air distribution box.

[0007] Furthermore, the carrier truck is provided with a sewage pretreatment tank, and the sewage pretreatment tank and the flotation tank are connected via a pipeline.

[0008] Furthermore, the bottom of the shaft rod passes through the dissolved air pipe and extends to the inside of the dissolved air distribution box, and the air outlet cover plate is installed at the bottom of the dissolved air pipe.

[0009] Furthermore, the embedded plate includes a base plate and a cylinder, the base plate is fixedly connected to the top of the cylinder, and a plurality of water outlet holes are opened inside the cylinder.

[0010] Furthermore, a water outlet square pipe is fixedly passed through the back of the flotation box, and a foam box is installed on the back of the flotation box, and the foam box is located at the rear and lower part of the foam scraper.

[0011] Furthermore, an agitator is installed on the sewage pretreatment tank, and a water inlet pipe is fixedly passed through the right side of the sewage pretreatment tank.

[0012] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0013] The mobile dissolved air flotation device, through the cooperation of the bubble divider and the embedded plate, can make the bubble divider produce more dense tiny bubbles, thereby increasing the chance of impurities being adhered to the bubbles. At the same time, because the bubble divider is located on the inner side of the embedded plate, and the sewage will be directly above the bubble divider after passing through the embedded plate, the bubbles generated by the bubble divider will float from under the sewage, making it easier for the bubbles generated by the bubble divider to adhere to the impurities, thereby effectively improving the impurity flotation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 This is an enlarged cross-sectional view of the bubble distributor of the utility model;

[0016] Figure 3 This is a schematic diagram of the embedded plate of the utility model;

[0017] Figure 4 It is a partial side view of the flotation box of the utility model.

[0018] In the figure: 1. carrier truck; 2. sewage pretreatment tank; 3. flotation tank; 4. mounting frame; 5. dissolved air pipe; 6. bubble distributor; 61. dissolved air distribution box; 62. air outlet cover plate; 63. motor; 64. shaft; 65. three-pronged paddle; 66. cut-off scraper; 7. embedded plate; 71. base plate; 72. cylinder; 73. water inlet hole; 8. dissolved air device; 9. foam scraper; 10. water outlet square pipe; 11. foam box; 12. slag outlet pipe. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-4 A mobile dissolved air flotation device in this embodiment includes a flotation box 3, a dissolved air device 8 and a carrier trolley 1 for towing the flotation box 3 and the dissolved air device 8, wherein: a mounting frame 4 is provided at the top of the flotation box 3, a dissolved air pipe 5 extending into the flotation box 3 is provided on the mounting frame 4, a bubble distributor 6 is provided at the bottom of the dissolved air pipe 5, an embedded plate 7 matching the bubble distributor 6 is provided on the inner wall of the flotation box 3, and a foam scraper 9 for scraping off foam is provided at the top of the flotation box 3.

[0021] Among them, moving wheels are installed at the four corners of the bottom of the towing plate car 1 to facilitate the transfer of the device. A slag discharge pipe 12 is fixed through the bottom of the flotation box 3, and a valve is installed on the slag discharge pipe 12.

[0022] It should be noted that the foam scraper 9 includes a conveyor belt and a plurality of equidistantly distributed scrapers installed on the conveyor belt. The scrapers are driven by the conveyor belt to move, and the scrapers will scrape the scum on the water surface and collect it in the foam box 11.

[0023] The bubble distributor 6 includes an air outlet cover plate 62 and a motor 63. The motor 63 is fixedly mounted on the top of the mounting frame 4. A shaft 64 is fixedly connected to the output shaft of the motor 63. A three-pronged paddle plate 65 is threadedly connected to the bottom of the shaft 64. Cut-off scrapers 66 are fixed on both sides of the top of the three-pronged paddle plate 65. The air outlet cover plate 62 is fixedly mounted on the bottom of the dissolved air pipe 5. The inner thread of the air outlet cover plate 62 is connected to the dissolved air distribution box 61. The three-pronged paddle plate 65 is movably connected to the inside of the dissolved air distribution box 61. The bottom of the shaft 64 passes through the dissolved air pipe 5 and extends to the inside of the dissolved air distribution box 61. The air outlet cover plate 62 is mounted on the bottom of the dissolved air pipe 5.

[0024] See also Figure 3 The embedded plate 7 includes a base plate 71 and a cylinder 72 . The base plate 71 is fixedly connected to the top of the cylinder 72 . A plurality of water outlet holes 73 are opened inside the cylinder 72 .

[0025] It can be understood that the cooperation between the bubble distributor 6 and the embedded plate 7 can enable the bubble distributor 6 to produce more dense tiny bubbles, thereby increasing the chance of impurities being adhered to the bubbles.

[0026] At the same time, since the bubble separator 6 is located on the inner side of the embedded plate 7, and the sewage will be directly above the bubble separator 6 after passing through the embedded plate 7, the bubbles generated by the bubble separator 6 will float up from under the sewage, making it easier for the bubbles generated by the bubble separator 6 to stick to impurities, thereby effectively improving the impurity flotation effect.

[0027] It should be noted that the gas dissolving device 8 includes a reflux box, a water pump and an air pump. The output end of the air pump is equipped with a pipeline extending into the junction box, and the output end of the water pump is connected to one side of the gas dissolving pipe 5 through a pipeline.

[0028] In this embodiment, a sewage treatment tank 2 is provided on the carrier truck 1, and the sewage pretreatment tank 2 and the flotation tank 3 are connected via a pipeline.

[0029] See also Figure 2 A water outlet square pipe 10 is fixed through the back of the flotation box 3 , and a foam box 11 is installed on the back of the flotation box 3 , and the foam box 11 is located at the rear and lower part of the foam scraper 9 .

[0030] It should be noted that an agitator is installed on the sewage pretreatment tank 2, and an inlet pipe is fixedly passed through the right side of the sewage pretreatment tank 2. By adding flocculants and coagulants into the sewage pretreatment tank 2 and cooperating with the agitator to accelerate the speed of the sewage flocculation reaction, the flocculated sewage is discharged into the flotation tank 3.

[0031] The working principle of the above embodiment is as follows: after the sewage passes through the flocculation in the sewage pretreatment box 2, it enters the flotation box 3 through the connecting pipe, and then enters the space above the embedded plate 7 from the water inlet hole 73 in the embedded plate 7. Since the dissolved air distribution box 61 is located in the cylinder 72 in the middle of the embedded plate 7, the dissolved air generated by the dissolved air distribution box 61 will evenly impact the sewage entering from the water inlet hole 73, so that the sewage and the bubbles are fully in contact. When the impurities adhere to the bubbles and float to the water surface, they can be scraped off by the foam scraper 9, and the clean water flows away through the water outlet square pipe 10 below the foam scraper 9 and enters the water outlet square pipe. Part of the clean water in 10 enters the dissolved air device 8 as a water source through the shunt pipe, and the other part of the clean water is directly discharged. The dissolved air liquid is poured into the dissolved air pipe 5 through the water pump in the dissolved air device 8, and then flows into the dissolved air distribution box 61 in the bubble distributor 6, and enters the flotation box 3 through the holes on the air outlet cover plate 62. When the dissolved air liquid passes through the air outlet cover plate 6, the motor 36 drives the shaft 64 to rotate at a high speed, and then drives the three-pronged paddle plate 65 to rotate synchronously, and then the three-pronged paddle plate 65 drives the cutting scraper 66 to continuously cut off the dissolved air liquid passing through the holes of the air outlet cover plate 62, thereby presenting a larger number of micro bubbles.

[0032] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mobile dissolved air flotation device, comprising a flotation box (3), a dissolved air device (8) and a carrier vehicle (1) for towing the flotation box (3) and the dissolved air device (8), characterized in that: The top of the flotation box (3) is provided with a mounting frame (4), the mounting frame (4) is provided with an air dissolving pipe (5) extending into the flotation box (3), the bottom of the air dissolving pipe (5) is provided with a bubble distributor (6), the inner wall of the flotation box (3) is provided with an embedded plate (7) matching the bubble distributor (6), and the top of the flotation box (3) is provided with a foam scraper (9) for scraping foam; The bubble distributor (6) comprises an air outlet cover plate (62) and a motor (63), wherein the motor (63) is fixedly mounted on the top of the mounting frame (4), a shaft (64) is fixedly connected to the output shaft of the motor (63), a three-pronged paddle plate (65) is threadedly connected to the bottom of the shaft (64), and cut-off scrapers (66) are fixedly mounted on the left and right sides of the top of the three-pronged paddle plate (65), the air outlet cover plate (62) is fixedly mounted on the bottom of the dissolved air pipe (5), the internal thread of the air outlet cover plate (62) is threadedly connected to the dissolved air distribution box (61), and the three-pronged paddle plate (65) is movably connected to the inside of the dissolved air distribution box (61).

2. A mobile dissolved air flotation device according to claim 1, characterized in that: The carrier truck (1) is provided with a sewage pretreatment tank (2), and the sewage pretreatment tank (2) and the flotation tank (3) are connected via a pipeline.

3. A mobile dissolved air flotation device according to claim 1, characterized in that: The bottom of the shaft rod (64) passes through the dissolved air pipe (5) and extends to the inside of the dissolved air distribution box (61), and the gas outlet cover plate (62) is installed at the bottom of the dissolved air pipe (5).

4. A mobile dissolved air flotation device according to claim 1, characterized in that: The embedded plate (7) comprises a base plate (71) and a cylinder (72); the base plate (71) is fixedly connected to the top of the cylinder (72); and a plurality of water outlet holes (73) are provided inside the cylinder (72).

5. A mobile dissolved air flotation device according to claim 1, characterized in that: A water outlet square pipe (10) is fixedly passed through the back of the flotation box (3), and a foam box (11) is installed on the back of the flotation box (3). The foam box (11) is located at the rear and lower part of the foam scraper (9).

6. A mobile dissolved air flotation device according to claim 2, characterized in that: The sewage pretreatment box (2) is provided with a stirrer, and a water inlet pipe is fixedly passed through the right side of the sewage pretreatment box (2).

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