Waste liquid purification treatment device based on pig farming

Abstract

The present invention discloses a purification treatment device for waste liquid based on pig farming, including a main body; and a solid-liquid pre-separation chamber, an air flotation working chamber, and a biological disk treatment chamber that are sequentially arranged inside the main body; a double-rotation fan mechanism is arranged inside the air flotation working chamber; an aeration component is respectively arranged on the opposite surfaces of the first impeller and the second impeller for injecting gas into the sewage, and a liquid spraying rod is arranged in the middle of the installation rod for dispersedly injecting a flocculant. Through the ingenious setting of the structure of the present invention, that is, at the position where the liquid spraying rod is located, at this time, the flocculant, the "micro-bubbles" generated by the aeration component, and the upper and lower eddies all converge at this position, so as to be fully mixed, the gas distribution is uniform, and a large number of small bubbles are generated by convective collision, further improving the treatment effect of air flotation.

Description

Technical Field

[0001] The present invention relates to the technical field of waste liquid treatment, and specifically to a purification treatment device for waste liquid based on pig farming. Background Art

[0002] Pork has always been an essential kind of meat on the dinner tables in our country. Many farmers have also seen the breeding benefits of pigs. However, many problems will be encountered during the process of pig farming. If not handled properly, troubles may occur. The problem of wastewater in pig farms will be encountered during the process of pig farming;

[0003] There are still many existing treatment methods for sewage in farms, such as biological filtration method, activated sludge treatment method, ordinary filtration method, biological stratification method, ordinary coagulation method, and ditch cultivation method, etc. In the pig wastewater treatment project, the wastewater is a mixture of solid and liquid, with a high concentration of organic suspended solids and high viscosity; pig manure and feed residues containing a large amount of organic substances are discharged into the wastewater together with the flushing water. This results in a relatively high concentration of organic suspended solids in pig wastewater, a large viscosity of the solid-liquid mixture, and the suspended solids such as manure residues and residues are also likely to block the pipelines of the treatment facilities, increasing the treatment difficulty. Therefore, a purification treatment device for waste liquid based on pig farming is proposed. Summary of the Invention

[0004] The purpose of the present invention is to provide a purification treatment device for waste liquid based on pig farming. Through the ingenious setting of the structure, that is, the position where the liquid spraying rod is located, at this time, the flocculant, the "microbubbles" generated by the aeration component, and the upper and lower eddies all converge at this position, so that sufficient mixing can be carried out, the gas distribution is uniform, and a large number of small bubbles are generated by the convective collision, further improving the treatment effect of air flotation.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A purification treatment device for waste liquid based on pig farming, including a main body; and a solid-liquid pre-separation chamber, an air flotation working chamber, and a biological rotating disk treatment chamber sequentially arranged inside the main body; a double-rotating fan mechanism is arranged inside the air flotation working chamber. The double-rotating fan mechanism includes a rotatable mounting sleeve and a rotatable mounting rod arranged inside the mounting sleeve. The outer walls of the mounting sleeve and the mounting rod are respectively provided with a first impeller and a second impeller. The first impeller and the second impeller are arranged oppositely and have opposite rotation directions. A meshing transmission box assembly is arranged at the bottom of the main body for driving the first impeller and the second impeller to rotate in different directions; an aeration component is respectively arranged on the opposite surfaces of the first impeller and the second impeller for injecting gas into the sewage, and a liquid spraying rod is arranged in the middle of the mounting rod for dispersedly injecting and adding flocculant; a scraper mechanism is also arranged at the top of the air flotation working chamber for the biological recovery treatment of floating substances, and a through groove is opened on the inner wall of the air flotation working chamber for discharging the water after air flotation treatment.

[0006] Preferably, the meshing transmission box assembly includes an installation box, in which a rotatable installation shaft is installed at the top of the inner part. Two third transmission gears are fixed on the outer wall of the installation shaft, and second transmission gears are respectively fixed at the bottom of the installation sleeve. The second transmission gears are in meshing transmission with the third transmission gears located at the upper part of the installation shaft. A third motor is fixed on the top of the installation box, and the output shaft of the third motor is connected with a driving gear, which is in meshing transmission with the third transmission gear located at the lower part of the installation shaft. A first transmission gear is fixed at the lower part of the installation rod, and the first transmission gear is in meshing transmission with the driving gear.

[0007] Preferably, the installation rod is hollow, and the installation rod is communicated with a plurality of spray heads on the liquid spraying rod. A rotating sealing ring is arranged at the bottom of the installation rod for externally connecting a flocculant adding pipe.

[0008] Preferably, each group of the aeration assemblies includes an aeration head arranged on the double - rotary fan mechanism, and a rotating sealing sleeve arranged on the opposite side of the double - rotary fan mechanism. A connecting pipe is connected to the rotating sealing sleeve for externally connecting gas, and a conduit is arranged at the end of the aeration head for communicating with the rotating sealing sleeve respectively.

[0009] Preferably, the solid - liquid pre - separation chamber includes a feeding chamber, and a grid plate arranged on the inner wall of the feeding chamber for solid - liquid separation.

[0010] Preferably, the scraper mechanism includes a horizontally arranged support frame, and a conveyor belt arranged between the support frames. A plurality of scraping bars are arranged on the surface of the conveyor belt for scraping floating objects when the conveyor belt runs. A collecting chamber is arranged on one side of the air - flotation working chamber for receiving the scraped floating objects.

[0011] Preferably, the biological rotating disk treatment chamber includes two installation parts, and a rotatable connecting shaft arranged on the two installation parts. Discs are respectively fixed on the opposite surfaces of the two connecting shafts. A connecting rod transmission frame assembly is arranged on the opposite surfaces of the two discs for installing a plurality of biological disk sheets. A first motor is arranged inside one of the installation parts for driving the angular rotation of the connecting shaft.

[0012] Preferably, the connecting rod transmission frame assembly includes a plurality of installation frames. Installation blocks are arranged between adjacent installation frames. The installation blocks are provided with two rotating sealing sleeves for rotatably installing the installation frames. An electric telescopic rod is arranged on the installation block. The output shaft of the electric telescopic rod is hinged with two connecting rods, and the opposite ends of the two connecting rods are respectively hinged with the corners where the adjacent installation frames are located.

[0013] Preferably, it further includes a receiving belt device arranged at the lower part of the biological rotating disk treatment chamber for sludge receiving; the receiving belt device includes a receiving belt and a plurality of cam transmission components arranged under the receiving belt for making the receiving belt move up and down.

[0014] Preferably, the receiving belt device includes a rotatable rotating shaft and an eccentrically arranged cam; and a mounting strip fixed on the inner wall of the biological rotating disk treatment chamber, a movable rod that can slide up and down is installed inside the mounting strip, and a connecting piece arranged on the top of the cam for rotatably installing with the bottom of the movable rod, the top of the movable rod contacts the lower surface of the receiving belt; and a second motor arranged on the inner wall of the biological rotating disk treatment chamber for driving the rotating shaft to rotate.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. Through the position setting of the liquid spraying rod and the first impeller and the second impeller distributed in the upper and lower parts in the present invention, when the first impeller and the second impeller rotate in different directions, as shown in the figure, when the second impeller in the upper part rotates to drive the water body to generate a downward vortex, while the lower part rotates in the opposite direction to generate an upward vortex, the upper and lower vortices converge in the middle where the mounting rod is located, that is, the position where the liquid spraying rod is located. At this time, the flocculant, the "microbubbles" generated by the aeration component, and the upper and lower vortices all converge at this position, so that full mixing can be carried out, the gas distribution is uniform, and a large number of small bubbles are generated by convective collision, further improving the treatment effect of air flotation.

[0017] 2. Through the arranged aeration component in the present invention, the aeration head is arranged on the opposite side of the double - spiral fan mechanism. Under the swirling action of the second impeller and the first impeller, combined with the position setting of the aeration head, the "microbubbles" generated by the aeration component can be better mixed with the sewage.

[0018] 3. As another implementation manner of the present invention, through the arranged connecting rod transmission frame component and a plurality of biological disk pieces, when the connecting rod transmission frame component operates, the biological disk pieces have two distribution states. The first is in the form of a biological rotating disk, and the second is in the form of a biological wire disk.

[0019] 4. As other implementation manners of the present invention, and the receiving belt device arranged at the lower part of the biological rotating disk treatment chamber, when the cam transmission component operates, it can drive the receiving belt to perform up - and - down undulating fluctuations, that is, to perform intermittent undulations within a fixed range, so as to avoid the expansion and extrusion overlap of the sludge accumulation surface, and further improve the scope and efficiency of acidification. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is the internal structure schematic diagram of the present invention;

[0021] Figure 2 Schematic diagram of the disassembly structure of the biological rotating disk of the present invention;

[0022] Figure 3 is Figure 2 Schematic plan structure diagram of the connecting rod drive frame assembly;

[0023] Figure 4 is Figure 3 Schematic diagram of the unfolded structure;

[0024] Figure 5 Partial sectional structure diagram of the cam drive assembly of the present invention;

[0025] Figure 6 Partial disassembly structure diagram of the double - spiral fan mechanism of the present invention;

[0026] Figure 7 is Figure 6 Schematic diagram of the second - view structure;

[0027] Figure 8 Top - view structure diagram of the air - flotation working chamber of the present invention.

[0028] In the figure: 1, body; 2, installation box; 3, rotating seal ring; 4, grid plate; 5, feed chamber; 7, first impeller; 8, liquid - spraying rod; 9, second impeller; 10, scraping strip; 11, conveyor belt; 12, support frame; 13, through - slot; 14, second motor; 16, disk; 17, electric telescopic rod; 18, connecting rod; 20, receiving belt; 21, rotating shaft; 22, cam; 23, installation strip; 24, movable rod; 25, installation rod; 26, connecting pipe; 27, installation part; 28, connecting shaft; 29, disk; 30, connecting part; 31, installation frame; 35, installation block; 36, biological disk sheet; 37, rotating sealing sleeve; 39, first transmission gear; 41, driving gear; 42, third motor; 43, installation shaft; 45, second transmission gear; 46, installation sleeve; 47, collection chamber; 49, third transmission gear. Specific embodiments

[0029] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. The following will introduce each embodiment of the present invention in detail with reference to the drawings.

[0030] Embodiment 1:

[0031] Please refer to Figures 1 to 8 , the present invention provides a preferred technical solution: a waste liquid purification treatment device for pig farming, including a main body 1; and a solid-liquid pre-separation chamber, an air flotation working chamber, and a biological disk treatment chamber sequentially arranged inside the main body 1; a double-rotating fan mechanism is arranged inside the air flotation working chamber, the double-rotating fan mechanism includes a rotatable mounting sleeve 46, and a rotatable mounting rod 25 arranged inside the mounting sleeve 46. The outer walls of the mounting sleeve 46 and the mounting rod 25 are respectively provided with a first impeller 7 and a second impeller 9. The first impeller 7 and the second impeller 9 are arranged oppositely and have opposite rotation directions. A meshing transmission box assembly is arranged at the bottom of the main body 1 for driving the first impeller 7 and the second impeller 9 to rotate in different directions; an aeration assembly is respectively arranged on the opposite surfaces of the first impeller 7 and the second impeller 9 for injecting gas into the sewage, and a liquid spraying rod 8 is arranged in the middle of the mounting rod 25 for dispersedly injecting a flocculant; it also includes a scraping mechanism arranged at the top of the air flotation working chamber for biological recovery treatment of floating substances, and a through groove 13 opened on the inner wall of the air flotation working chamber for discharging the water after air flotation treatment.

[0032] In this embodiment, as Figure 1 , 6 , 7, and 8 show that when the waste liquid of pigs enters the feeding chamber 5, preliminary solid-liquid separation can be carried out under the action of the grid plate 4. When it enters the air flotation working chamber, through the arranged double-rotating fan mechanism;

[0033] In this structure, as Figure 1 shows, due to the liquid spraying rod 8 in the middle of the mounting rod 25 for dispersedly injecting a flocculant, through the added flocculant, the turbidity in the water body can form suspended flocs. Under the action of air flotation, air flotation is generated by air. The aeration assembly directly injects "microbubbles" into the sewage. The "microbubbles" are evenly distributed in the sewage and float the impurities in the sewage. Cleaning is carried out under the action of the scraping mechanism;

[0034] The position setting of the liquid spraying rod 8, and the first impeller 7 and the second impeller 9 distributed in the upper and lower parts. When the first impeller 7 and the second impeller 9 rotate in different directions, as Figure 1 shows, when the upper second impeller 9 rotates, driving the water body to generate a downward vortex, while the lower part rotates in the opposite direction to it, generating an upward vortex. The upper and lower vortices converge in the middle where the mounting rod 25 is located, that is, the position where the liquid spraying rod 8 is located. At this time, the flocculant, the "microbubbles" generated by the aeration assembly, and the upper and lower vortices all converge at this position, and sufficient mixing can be carried out, the gas distribution is uniform, and a large number of small bubbles are generated by convective collision, further improving the air flotation treatment effect.

[0035] Further, the meshing transmission box assembly includes an installation box 2. Inside the installation box 2, a rotatable installation shaft 43 is installed at the top. On the outer wall of the installation shaft 43, two third transmission gears 49 are fixed, and second transmission gears 45 are respectively fixed at the bottom of the installation sleeve 46. The second transmission gears 45 are in meshing transmission with the third transmission gears 49 located in the upper part of the installation shaft 43. And a third motor 42 is fixed on the top of the installation box 2. The output shaft of the third motor 42 is connected with a driving gear 41, and the driving gear 41 is in meshing transmission with the third transmission gear 49 located in the lower part of the installation shaft 43. And a first transmission gear 39 is fixed at the lower part of the installation rod 25, and the first transmission gear 39 is in meshing transmission with the driving gear 41.

[0036] Through the provided meshing transmission box assembly, as Figure 6 , 7 shown, when the third motor 42 works, it can drive the driving gear 41 to rotate. Since the driving gear 41 is meshed with the first transmission gear 39 and at the same time the driving gear 41 is also meshed with the third transmission gear 49, the rotation of the first transmission gear 39 can directly drive the second impeller 9 where the installation rod 25 is located to rotate. And the second transmission gear 45 is in meshing transmission with the third transmission gear 49 where the installation shaft 43 is located, that is, the third transmission gear 49 serves as an intermediate transmission medium to drive the second transmission gear 45 to rotate, and further drives the first impeller 7 where the installation sleeve 46 is located to rotate, so that the rotations of the second impeller 9 and the first impeller 7 in different directions can be realized.

[0037] Further, the installation rod 25 is hollow, and the installation rod 25 is communicated with a plurality of nozzles on the liquid spraying rod 8. And a rotating sealing ring 3 is provided at the bottom of the installation rod 25 for externally connecting a flocculant injection pipe.

[0038] Through the provided rotating sealing ring 3, when it is docked with the externally connected flocculant injection pipe, and when the installation rod 25 rotates, due to the connecting function of the rotating sealing ring 3, the connection tightness with the installation rod 25 can be ensured.

[0039] Further, each group of aeration assemblies includes an aeration head arranged on the double - rotation fan mechanism, and a rotating sealing sleeve 37 arranged on the back surface of the double - rotation fan mechanism. A connecting pipe 26 is connected to the rotating sealing sleeve 37 for externally connecting gas, and a conduit is arranged at the end of the aeration head for communicating with the rotating sealing sleeve 37 respectively.

[0040] Through the provided aeration assemblies, the aeration heads are arranged on the opposite sides of the double - rotation fan mechanism. Under the swirling action of the second impeller 9 and the first impeller 7, and in cooperation with the setting of the position of the aeration heads, the "micro - bubbles" generated by the aeration assemblies can be better and fully mixed with the sewage.

[0041] Further, the solid - liquid pre - separation chamber includes a feed chamber 5, and a grid plate 4 arranged on the inner wall of the feed chamber 5 for solid - liquid separation.

[0042] As shown Figure 1 The grille plate 4 where the solid-liquid pre-separation chamber is located can separate the solid and liquid of the waste liquid.

[0043] Furthermore, the scraper mechanism includes a horizontally arranged support frame 12 and a conveyor belt 11 arranged between the support frames 12. There are several scraping bars 10 on the surface of the conveyor belt 11, which are used to scrape out floating objects when the conveyor belt 11 runs; and a collection chamber 47 is arranged on one side of the air flotation working chamber to receive the scraped floating objects.

[0044] Through the set scraper mechanism, as Figure 1 and 8 shown, when the conveyor belt 11 is working and conveying, it can drive the scraping bars 10 thereon to move, so that the scraping bars 10 scrape the floating objects on the sewage, and further drive the floating objects into the collection chamber 47.

[0045] Embodiment 2:

[0046] As another implementation manner of the present invention, the biological disk treatment chamber includes two mounting members 27 and a rotatable connecting shaft 28 arranged on the two mounting members 27. Opposite surfaces of the two connecting shafts 28 are respectively fixed with disks 29, and a connecting rod transmission frame assembly is arranged on the opposite surfaces of the two disks 29 for installing a number of biological disk pieces 36; and a first motor is arranged inside one of the mounting members 27 for driving the angular rotation of the connecting shaft 28.

[0047] In this embodiment, as Figure 1 、 2 、3 and 4, through the set connecting rod transmission frame assembly and a number of biological disk pieces 36, when the connecting rod transmission frame assembly runs, the biological disk pieces 36 have two distribution states;

[0048] The first is in the form of a biological disk, and microorganisms grow attached to the biological disk pieces 36. As Figure 2 and 3 shown, half of the disk is immersed in the sewage. For the biological disk pieces 36 immersed in the sewage, the microorganisms on the upper part thereof come into contact and adsorb with the sewage. Under the action of the disk 29, the biological disk pieces 36 can rotate at a low speed. When the immersed part leaves the sewage, a water film is formed on the surface of the biological disk pieces 36. The water film absorbs oxygen from the air, enabling the biological film to decompose the adsorbed organic matter under aerobic conditions. During the continuous rotation of the disk pieces, they alternately come into contact with the wastewater and air, performing a cycle process of adsorption-oxygen absorption-oxidative decomposition, so as to purify the sewage;

[0049] The second is in the form of a biological wire disk, that is, as Figure 4As shown, there is a state, which is set inside the body 1. In this state, the water flows from left to right, and the sewage can impact and adhere to the biofilm. The rotation of the disc 16 and the setting of the connecting rod transmission frame assembly can realize the biological disc 36 from straight line-bend-disc shape, so that the process can make the biological disc 36 immersed-detached-immersed in the sewage, thereby realizing the above-mentioned biological rotating disc process, but the speed of the biological rotating disc will affect the drop or survival rate of microorganisms. The biological line disc itself bends and lifts off the water surface, and the drop shape of the microorganisms will be greatly reduced;

[0050] During the rapid switching between the biological turntable and the biological line reel, the aging biofilm can be accelerated to fall off and the biofilm can be renewed.

[0051] Furthermore, the connecting rod transmission frame assembly includes a plurality of mounting frames 31, mounting blocks 35 are arranged between adjacent mounting frames 31, the mounting blocks 35 are provided with two rotating sealing sleeves 37 for rotatably mounting the mounting frames 31; and an electric telescopic rod 17 is arranged on the mounting block 35, the output shaft of the electric telescopic rod 17 is hinged to two connecting rods 18, and the opposite ends of the two connecting rods 18 are respectively hinged to the corners where the adjacent mounting frames 31 are located.

[0052] like Figure 2 , 3 As shown in FIG. 4 , the mounting frame 31 at the head end is fixed to the side wall of the disc 29, and a mounting block 35 is provided between adjacent mounting frames 31. The mounting block 35 is provided with two rotating sealing sleeves 37 for rotatingly mounting the mounting frame 31. Figures 3 to 4 The electric telescopic rod 17 is converted to shrink, and the corresponding connecting rod 18 separates the mounting frames 31 on the adjacent sides, that is, the conversion from the turntable structure to the wire drum structure is finally realized. Similarly, Figures 4 to 3 By driving the electric telescopic rod 17 in the opposite direction, the conversion from the wire drum structure to the turntable structure can be realized.

[0053] Embodiment 3:

[0054] As another embodiment of the present invention, it also includes a receiving belt device arranged at the lower part of the biological rotary disc treatment chamber for receiving sludge; the receiving belt device includes a receiving belt 20, and a plurality of cam transmission components arranged at the lower part of the receiving belt 20 for making the receiving belt 20 move up and down.

[0055] In this embodiment, if Figure 1As shown, when the cam drive assembly operates, it can drive the receiving belt 20 to undulate up and down. Preferably, a hydrolytic acidification reactor is provided on the surface of the receiving belt 20 at the acidification treatment site. This is a mature existing technology. When the cam drive assembly operates, it can drive the receiving belt 20 to undulate up and down, that is, to undergo jitter deformation within a fixed range, thereby presenting intermittent undulations, avoiding the expansion and extrusion overlap of the sludge accumulation surface, and further improving the acidification range and efficiency.

[0056] Furthermore, the receiving belt device includes a rotatable rotating shaft 21, and an eccentrically arranged cam 22; and a mounting strip 23 fixed on the inner wall of the biological disk treatment chamber. An internally mounted movable rod 24 that can slide up and down is installed inside the mounting strip 23, and a connecting member 30 is provided on the top of the cam 22 for rotatably mounting with the bottom of the movable rod 24. The top of the movable rod 24 is in contact with the lower surface of the receiving belt 20; and a second motor 14 is provided on the inner wall of the biological disk treatment chamber for driving the rotating shaft 21 to rotate.

[0057] Through the structural arrangement of the receiving belt device, as Figure 5 shown, when the rotating shaft 21 rotates, due to the eccentric arrangement of several cams 22 and the connection of the connecting member 30 at the top, and in cooperation with the internally mounted movable rod 24 that can slide up and down inside the mounting strip 23, when the rotating shaft 21 drives several eccentrically arranged cams 22 to rotate, the movable rod 24 can be made to move up and down to different degrees inside the mounting strip 23, that is, to drive the position where the receiving belt 20 is located to undulate.

[0058] The above combines examples and drawings to clearly and completely describe the concept, specific structure, and technical effects generated by the present invention, so as to fully understand the purpose, features, and effects of the present invention. Obviously, the described examples are only a part of the examples of the present invention, not all of them. Based on the examples of the present invention, other examples obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention. In addition, all the connection / linkage relationships mentioned in the text do not simply refer to the direct connection of components, but refer to the formation of a more optimal connection structure by adding or reducing connection accessories according to specific implementation situations.

[0059] The above specific description of the present invention in the examples is only for further illustration of the present invention and cannot be understood as a limitation on the protection scope of the present invention. Non-essential improvements and adjustments made by technical engineers in the art to the present invention based on the content of the above invention all fall within the protection scope of the present invention.

Claims

1. The waste liquid purification treatment device based on pig farming is characterized in that: including a main body (1); and a solid-liquid pre-separation chamber, a flotation working chamber, and a biological disk treatment chamber that are sequentially arranged inside the main body (1); a double-rotating fan mechanism is arranged inside the flotation working chamber, the double-rotating fan mechanism includes a rotatable mounting sleeve (46), and a rotatable mounting rod (25) arranged inside the mounting sleeve (46), a first impeller (7) and a second impeller (9) are respectively arranged on the outer walls of the mounting sleeve (46) and the mounting rod (25), the first impeller (7) and the second impeller (9) are arranged oppositely and have opposite rotation directions, and a meshing transmission box assembly arranged at the bottom of the main body (1) is used to drive the first impeller (7) and the second impeller (9) to rotate in different directions; an aeration assembly respectively arranged on the opposite surfaces of the first impeller (7) and the second impeller (9) is used to inject gas into the sewage, and a liquid spraying rod (8) arranged in the middle of the mounting rod (25) is used to disperse and add a flocculant; it further includes a scraping mechanism arranged at the top of the flotation working chamber for biological recovery treatment of floating substances, and a through groove (13) opened on the inner wall of the flotation working chamber for discharging the water after flotation treatment; the mounting rod (25) is hollow, and the mounting rod (25) is communicated with a plurality of nozzles on the liquid spraying rod (8), and a rotating sealing ring (3) arranged at the bottom of the mounting rod (25) is used to externally connect a flocculant filling pipe; each group of the aeration assemblies includes an aeration head arranged on the double-rotating fan mechanism, and a rotating sealing sleeve (37) arranged on the opposite side of the double-rotating fan mechanism, a connecting pipe (26) is connected to the rotating sealing sleeve (37) for externally connecting a gas, and a conduit arranged at the end of the aeration head is respectively used to communicate with the rotating sealing sleeve (37); the biological disk treatment chamber includes two mounting members (27), and a rotatable connecting shaft (28) arranged on the two mounting members (27), disks (29) are respectively fixed on the opposite surfaces of the two connecting shafts (28), and a connecting rod transmission frame assembly is arranged on the opposite surfaces of the two disks (29) for mounting a plurality of biological disk pieces (36); and a first motor arranged inside one of the mounting members (27) is used to drive the connecting shaft (28) to rotate; the connecting rod transmission frame assembly includes a plurality of mounting frames (31), mounting blocks (35) are arranged between adjacent mounting frames (31), and two rotating sealing sleeves (37) are arranged on the mounting blocks (35) for rotatably mounting the mounting frames (31); and an electric telescopic rod (17) arranged on the mounting block (35), the output shaft of the electric telescopic rod (17) is hinged with two connecting rods (18), and the opposite ends of the two connecting rods (18) are respectively hinged with the corners where the adjacent mounting frames (31) are located.

2. The waste liquid purification treatment device based on pig farming according to claim 1, characterized in that: The meshing transmission box assembly includes an installation box (2). Inside the installation box (2), a rotatable installation shaft (43) is installed at the top. Two third transmission gears (49) are fixed to the outer wall of the installation shaft (43), and a second transmission gear (45) is respectively fixed to the bottom of the installation sleeve (46). The second transmission gear (45) meshes and drives with the third transmission gear (49) where the upper part of the installation shaft (43) is located. A third motor (42) is fixed to the top of the installation box (2). The output shaft of the third motor (42) is connected with a driving gear (41), and the driving gear (41) meshes and drives with the third transmission gear (49) where the lower part of the installation shaft (43) is located; and a first transmission gear (39) fixed to the lower part of the installation rod (25). The first transmission gear (39) meshes and drives with the driving gear (41).

3. The waste liquid purification treatment device based on pig farming according to claim 1, wherein: The solid-liquid pre-separation chamber includes a feed chamber (5), and a grid plate (4) provided on the inner wall of the feed chamber (5) for solid-liquid separation.

4. The waste liquid purification treatment device based on pig farming according to claim 1, characterized in that: The scraper mechanism includes a horizontally arranged support frame (12), and a conveyor belt (11) arranged between the support frames (12). A plurality of scraping bars (10) are respectively provided on the surface of the conveyor belt (11) for scraping out floating objects when the conveyor belt (11) runs; and a collection chamber (47) provided on one side of the air flotation working chamber for receiving the scraped floating objects.

5. The waste liquid purification treatment device based on pig farming according to claim 1, characterized in that: It also includes a receiving belt device provided below the biological rotating disk treatment chamber for receiving sludge; The receiving belt device includes a receiving belt (20), and a plurality of cam transmission components provided below the receiving belt (20) for making the receiving belt (20) move up and down.

6. The waste liquid purification treatment device based on pig farming according to claim 5, wherein: The receiving belt device includes a rotatable rotating shaft (21), and an eccentrically arranged cam (22); and a mounting strip (23) fixed to the inner wall of the biological rotating disk treatment chamber. An axially slidable movable rod (24) is installed inside the mounting strip (23), and a connecting piece (30) is provided on the top of the cam (22) for rotatably installing with the bottom of the movable rod (24). The top of the movable rod (24) contacts the lower surface of the receiving belt (20); and a second motor (14) provided on the inner wall of the biological rotating disk treatment chamber for driving the rotating shaft (21) to rotate.

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