Waste liquid circulating treatment system for low-fat condensed milk production

Abstract

The invention relates to the field of waste liquid circulation treatment devices, in particular to a waste liquid circulation treatment system for low-fat condensed milk production, which comprises a sealing mechanism, the sealing mechanism comprises an air flotation machine, a pipeline arranged on the air flotation machine, a pair of supporting blocks fixedly connected to the air flotation machine, and a rotating shaft rotatably connected between the pair of supporting blocks, a rotating shaft is arranged on the air floatation machine, an adapter block is fixedly connected to the rotating shaft, a sealing cover is fixedly connected to the adapter block, the sealing cover deflects to seal the upper end of the air floatation machine, a strip-shaped opening matched with a pipeline is formed in the sealing cover, and a purification assembly used for purifying air is arranged on the sealing cover; the limiting mechanism comprises a tripod arranged on the side wall of the air flotation machine, a transmission assembly for providing power for the rotating shaft is arranged on the tripod, and a clamping assembly matched with the sealing cover is arranged on the air flotation machine. According to the device, the upper end of the air flotation machine can be sealed, and the situation that pungent smell affects the health of workers is avoided.

Description

Technical Field

[0001] The invention relates to the field of waste liquid circulation treatment devices, in particular to a waste liquid circulation treatment system for low-fat condensed milk production. Background Art

[0002] The condensed milk waste liquid recycling treatment system mainly includes the pretreatment stage, emulsion demulsification, deep treatment, recovery and reuse. The water quality after the above treatment should meet the recycling and reuse standards and can be reused in the production process, forming a closed-loop circulation system, which greatly reduces the consumption of new water and wastewater discharge. Condensed milk waste liquid usually contains high concentrations of organic matter, oil and suspended matter. These components increase the difficulty of treatment. According to the specific composition and treatment objectives of the condensed milk waste liquid, the appropriate treatment technology is selected. The most common method is flotation, which can effectively separate suspended matter and oil. The most common device for flotation is the flotation machine.

[0003] During use, existing flotation machines can generate bubbles to push sediment to the liquid surface, and finally use a scraper to scrape the sediment to achieve the effect of separating the sediment from the water. However, during use, a pungent odor is generated when treating the condensed milk waste liquid (mainly from organic matter in the condensed milk waste liquid and volatile organic compounds (VOCs) such as ammonia and hydrogen sulfide produced by microbial decomposition. These substances will be decomposed by microorganisms in the natural environment, and some odorous substances will be produced in the process, resulting in the condensed milk waste liquid having a pungent odor). Since the upper end of the existing flotation machine is open and cannot seal the pungent odor, workers who inhale the pungent odor can easily damage their health. Although wearing a mask or gas mask can alleviate the odor, wearing a mask or gas mask for a long time can easily make workers feel uncomfortable. Therefore, a low-fat condensed milk production waste liquid recycling treatment system that can prevent the leakage of pungent odor is needed to solve the above problem. Summary of the Invention

[0004] In view of the problem that pungent odor is generated when treating condensed milk waste liquid in the above or existing technologies, but the upper end of the flotation machine is open and the pungent odor cannot be sealed, and workers inhaling the pungent odor is likely to damage their health, the present invention is proposed.

[0005] To solve the above technical problems, the present invention provides the following technical solutions: it comprises a sealing mechanism, which includes an air floatation machine, a pipeline arranged on the air floatation machine, a pair of support blocks fixedly connected to the air floatation machine, a rotating shaft rotatably connected between the pair of support blocks, an adapter block fixedly connected to the rotating shaft, a sealing cover fixedly connected to the adapter block, the sealing cover deflects to seal the upper end of the air floatation machine, the sealing cover is provided with a strip opening that cooperates with the pipeline, and the sealing cover is provided with a purification component for purifying gas; a limiting mechanism, which comprises a tripod arranged on the side wall of the air floatation machine, the tripod is provided with a transmission component for providing power for the rotating shaft, the air floatation machine is provided with a clamping component cooperating with the sealing cover, a moving frame is slidably connected to the side wall of the air floatation machine, and the moving frame is provided with an anti-loosening component for preventing the clamping component from loosening; a sealing mechanism, which comprises a sealing component arranged in the strip opening, and the moving frame is provided with a power component that provides power for the sealing component.

[0006] As a preferred solution of the waste liquid circulation treatment system for low-fat condensed milk production of the present invention, the purification component includes an opening arranged on the sealing cover, a mounting cylinder with open upper and lower ends fixedly connected to the opening, an activated carbon layer is provided in the mounting cylinder, a support ring is threadedly connected to the upper end of the mounting cylinder, and a stop ring is fixedly connected to the lower end of the mounting cylinder.

[0007] As a preferred solution of the waste liquid circulation treatment system for low-fat condensed milk production of the present invention, the transmission assembly includes a motor fixedly connected to a tripod, three support plates fixedly connected to the output shaft of the motor, a transmission ring fixedly connected to the support plate, the front end of the rotating shaft passes through the support plate and is rotatably connected to the support plate, a disc fixedly connected to the rotating shaft, a notch is provided on the disc, an electromagnet is fixedly connected to the transmission ring, and an iron block cooperating with the electromagnet is fixedly connected to the inner wall of the notch.

[0008] As a preferred solution of the waste liquid circulation treatment system for low-fat condensed milk production of the present invention, the engaging assembly includes an L-shaped opening provided on the flotation machine, and the sealing cover is fixedly connected to an L-shaped block that matches the L-shaped opening.

[0009] As a preferred solution of the waste liquid circulation treatment system for low-fat condensed milk production of the present invention, wherein: the anti-loosening component includes an L-shaped plug block fixedly connected to the mounting frame, the L-shaped plug block translates and cooperates with the L-shaped block to prevent the L-shaped block from loosening, the flotation machine is fixedly connected to a U-shaped sleeve with a guide movable frame, the right end of the mounting frame is fixedly connected to an L-shaped bearing block, a cylinder is fixedly connected to the bearing block, a first arc groove is provided on the transmission ring, a second arc groove is connected to the first arc groove, the first arc groove and the second arc groove cooperate with the cylinder, and the distance between the second arc groove and the center point of the motor output shaft decreases in sequence along the transmission ring in a clockwise direction.

[0010] As a preferred solution of the waste liquid circulation treatment system for low-fat condensed milk production of the present invention, the arc length of the gap is equal to the single-side arc length of the first arc groove, and the arc length of the gap is greater than the single-side arc length of the second arc groove.

[0011] As a preferred solution of the waste liquid circulation treatment system for low-fat condensed milk production of the present invention, the sealing assembly includes an installation cavity arranged in the sealing cover, a pair of removal ports cooperating with the strip port is provided in the installation cavity, and a sealing block cooperating with the pipeline is slidably connected to the pair of removal ports.

[0012] As a preferred solution of the waste liquid circulation treatment system for low-fat condensed milk production of the present invention, the sealing block is L-shaped, and two of the sealing blocks are provided with semicircular openings that cooperate with the pipeline.

[0013] As a preferred solution of the waste liquid circulation treatment system for low-fat condensed milk production of the present invention, the power component includes an L-shaped extension plate fixedly connected to the left end sealing block, the sealing cover is provided with a through-hole for the extension plate to pass through, the extension plate extends to the outside of the through-hole, the mounting frame is fixedly connected to a carrier frame, the carrier frame is rotatably connected to a connecting block via a support shaft, the connecting block is fixedly connected to the extension plate, a support shaft is fixedly connected in the mounting cavity, a gear is rotatably connected to the support shaft, an L-shaped movable plate is fixedly connected to the sealing block at the right end, and the movable plate and the extension plate are both fixedly connected with meshing teeth that mesh with the gears.

[0014] As a preferred solution of the waste liquid circulation treatment system for low-fat condensed milk production of the present invention, the horizontal side of the extension plate and the horizontal side of the movable plate are arranged in an upper and lower position, and the distance between the vertical side of the extension plate and the horizontal side of the movable plate is greater than half the width of the strip opening.

[0015] Beneficial effects of the waste liquid circulation treatment system for low-fat condensed milk production of the present invention: By setting up a closing mechanism and a sealing cover at the upper end of the flotation machine, the pungent odor can be prevented from leaking out when treating condensed milk wastewater, thereby ensuring the factory environment and protecting the health of workers. A purification component is also provided, and the pungent odor is adsorbed by activated carbon and then released into the air, avoiding impact on the environment.

[0016] By setting a limiting mechanism, after the sealing cover closes the upper end of the flotation machine, as the motor continues to rotate, it can drive the L-shaped plug block to abut against the L-shaped block to prevent the L-shaped block from resetting and the sealing cover from loosening, thereby improving the protective effect of the sealing cover.

[0017] By setting up a sealing mechanism, the L-shaped plug and the L-shaped block can drive the two sealing blocks toward the pipe during movement, and allow the two sealing blocks to seal the strip opening. Even if a pipe is installed, the overall sealing of the sealing cover can be guaranteed to ensure the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a schematic diagram of the external structure of the waste liquid circulation treatment system for low-fat condensed milk production.

[0020] Figure 2 This is a cross-sectional structural diagram of the waste liquid recycling treatment system for low-fat condensed milk production.

[0021] Figure 3 for Figure 2 A magnified schematic diagram of the structure at point A.

[0022] Figure 4 Exploded view of the purification components of the waste liquid recycling system for low-fat condensed milk production.

[0023] Figure 5 This is a schematic diagram of the external structure of the transmission components of the waste liquid circulation treatment system for low-fat condensed milk production.

[0024] Figure 6 This is a schematic diagram of the external structure of the anti-loosening components of the waste liquid circulation treatment system for low-fat condensed milk production.

[0025] Figure 7 This is a schematic diagram of the cross-sectional structure of the sealing cover of the waste liquid circulation treatment system for low-fat condensed milk production.

[0026] Figure 8 for Figure 7 Enlarged schematic diagram of the structure at point B.

[0027] In the figure: 10, flotation machine; 11, pipeline; 12, support block; 13, rotating shaft; 14, adapter block; 15, sealing cover; 16, strip opening; 17, purification component; 171, mounting cylinder; 172, activated carbon layer; 173, support ring; 174, stop ring; 20, tripod; 21, transmission component; 211, motor; 212, support plate; 213, transmission ring; 214, disc; 215, notch; 216, electromagnet; 217, iron block; 22, locking component; 22 1. L-shaped opening; 222. L-shaped block; 23. Moving frame; 24. Anti-loosening assembly; 241. L-shaped plug block; 242. U-shaped sleeve; 243. Load-bearing block; 244. Cylinder; 245. First arcuate groove; 246. Second arcuate groove; 30. Sealing assembly; 301. Mounting cavity; 302. Removal opening; 303. Sealing block; 304. Semicircular opening; 31. Power assembly; 311. Extension plate; 312. Connecting block; 313. Gear; 314. Moving plate; 315. Meshing teeth. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0029] Example 1, with reference to Figures 1 to 4 , which is the first embodiment of the present invention, provides a waste liquid recycling treatment system for low-fat condensed milk production, which can prevent irritant leakage, improve the factory environment, and protect the safety of workers. The system includes a sealing mechanism, which includes an air floatation machine 10, a pipe 11 provided on the air floatation machine 10, a pair of support blocks 12 fixedly connected to the air floatation machine 10, a rotating shaft 13 rotatably connected between the pair of support blocks 12, a transfer block 14 fixedly connected to the rotating shaft 13, a sealing cover 15 fixedly connected to the transfer block 14, the sealing cover 15 deflects to seal the upper end of the air floatation machine 10, and the sealing cover 15 is provided with a seal connected to the pipe 11. The sealing cover 15 is provided with a purification component 17 for purifying the gas, which is matched with the strip-shaped opening 16; the limiting mechanism includes a tripod 20 arranged on the side wall of the flotation machine 10, and the tripod 20 is provided with a transmission component 21 for providing power to the rotating shaft 13; the flotation machine 10 is provided with a clamping component 22 that cooperates with the sealing cover 15, and a moving frame 23 is slidably connected to the side wall of the flotation machine 10, and the moving frame 23 is provided with an anti-loosening component 24 for preventing the clamping component 22 from loosening; the sealing mechanism includes a sealing component 30 arranged in the strip-shaped opening 16, and the moving frame 23 is provided with a power component 31 that provides power to the sealing component 30.

[0030] Specifically, the flotation machine 10 here is provided with a scraper and an air pump. The flotation machine 10 here is a prior art and will not be described in detail here. The number of pipes 11 here is set according to needs and is not limited to one. The adapter block 14 here is L-shaped, so that during the rotation of the adapter block 14, the sealing cover 15 will not be stuck with the side wall of the flotation machine 10.

[0031] Furthermore, the purification component 17 includes an opening provided on the sealing cover 15, in which a mounting cylinder 171 with open upper and lower ends is fixedly connected, an activated carbon layer 172 is provided in the mounting cylinder 171, a support ring 173 is threadedly connected to the upper end of the mounting cylinder 171, and a stop ring 174 is fixedly connected to the lower end of the mounting cylinder 171.

[0032] It should be noted that the activated carbon layer 172 here is provided with multiple layers, so that the air purification effect is better. If the flotation machine 10 is placed outdoors for use, a water shield similar to an umbrella needs to be provided on the support ring 173 to ensure that water does not directly soak the activated carbon layer 172. Of course, the shape of the water shield is not limited here, as long as it meets the requirements.

[0033] During use, when the flotation machine 10 is working, it is only necessary to move the sealing cover 15 so that the rotating shaft 13 rotates, driving the sealing cover 15 to cover the upper end of the flotation machine 10 to seal the upper end of the flotation machine 10. At this time, the pungent odor emitted from the sewage will not be directly discharged into the air, and will not affect the health of the workers in the factory. The emitted pungent odor is purified by the activated carbon layer 172 and then released into the air, protecting the health of the workers while achieving environmental protection. Of course, the activated carbon layer 172 here can also be replaced with particles, colloids, etc. that target pungent odors. The installation of the mounting cylinder 171 prevents the air pressure in the flotation machine 10 from being too high. It is worth noting that although the outlet pipe 11 of the flotation machine 10 is not sealed, since the outer end of the pipe 11 leads to the sewage treatment tank at a designated location, it is not in the factory, and thus will not affect the health of the workers in the factory.

[0034] In summary, by providing a sealing mechanism, a reversible sealing cover 15 is provided at the upper end of the flotation machine 10 to seal the upper end of the flotation machine 10, thereby preventing irritating odors from being directly emitted into the factory and protecting the health of workers. At the same time, the activated carbon layer 172 is used to purify the gas and achieve environmental protection.

[0035] Example 2, reference Figures 1 to 6, which is a second embodiment of the present invention. Unlike the previous embodiment, based on the first embodiment, this embodiment provides a limiting mechanism for a waste liquid circulation treatment system for low-fat condensed milk production, which solves the problem of how to prevent the sealing cover 15 from loosening. The limiting mechanism includes a motor 211 fixedly connected to a tripod 20, three support plates 212 fixedly connected to the output shaft of the motor 211, a transmission ring 213 fixedly connected to the support plate 212, a front end of the rotating shaft 13 passes through the support plate 212 and is rotatably connected to the support plate 212, a disc 214 fixedly connected to the rotating shaft 13, a notch 215 provided in the disc 214, an electromagnet 216 fixedly connected to the transmission ring 213, and an iron block 217 that cooperates with the electromagnet 216 fixedly connected to the inner wall of the notch 215; a locking assembly 22 includes an L-shaped opening 221 provided on the flotation machine 10, and an L-shaped block 222 that cooperates with the L-shaped opening 221 fixedly connected to the sealing cover 15.

[0036] Specifically, the inner diameter of the transmission ring 213 is larger than the outer diameter of the disc 214, so that when the transmission ring 213 rotates, it will not get stuck with the disc 214. The suction force of the electromagnet 216 is sufficient to ensure that when the transmission ring 213 rotates, the electromagnet 216 will not separate from the inner wall of the notch 215. A sealing gasket is provided on the inner wall of the sealing cover 15 to ensure the sealing effect. At the same time, the L-shaped block 222 is provided on the outside of the sealing gasket to ensure that it will not affect the sealing of the sealing cover 15.

[0037] Furthermore, the anti-loosening component 24 includes an L-shaped plug block 241 fixedly connected to the mounting frame, and the L-shaped plug block 241 translates and cooperates with the L-shaped block 222 to prevent the L-shaped block 222 from loosening. The flotation machine 10 is fixedly connected to a U-shaped sleeve 242 with the guide movable frame 23, and the right end of the mounting frame is fixedly connected to an L-shaped bearing block 243, and a cylinder 244 is fixedly connected to the bearing block 243. A first arc groove 245 is provided on the transmission ring 213, and a second arc groove 246 is connected to the first arc groove 245. The first arc groove 245 and the second arc groove 246 cooperate with the cylinder 244, and the distance between the second arc groove 246 and the center point of the output shaft of the motor 211 decreases in sequence in the clockwise direction along the transmission ring 213; the arc length of the notch 215 is equal to the unilateral arc length of the first arc groove 245, and the arc length of the notch 215 is greater than the unilateral arc length of the second arc groove 246.

[0038] It is worth noting that the translation of the L-shaped insert 241 causes the lower end surface of the L-shaped insert 241 to abut against the upper end surface of the L-shaped block 222, preventing the L-shaped block 222 from separating from the L-shaped opening 221 and limiting the position of the L-shaped block 222. The arc length of the notch 215 is greater than the arc length of a single side of the second arc-shaped groove 246. This ensures that when the cylinder 244 slides within the second arc-shaped groove 246, the electromagnet 216 will not become stuck with the notch 215.

[0039] During use, when the sealing cover 15 needs to be closed, the motor 211 is started, and the output shaft of the motor 211 rotates to drive the support plate 212 to rotate, and then the transmission ring 213 rotates, causing the electromagnet 216 to rotate counterclockwise (as viewed from the direction of the motor 211, the same below). During this process, the electromagnet 216 is energized, attracting the iron block 217, so that when the electromagnet 216 rotates counterclockwise, the iron block 217 rotates counterclockwise, and the disc 214 rotates counterclockwise, driving the rotating shaft 13 to rotate, so that the sealing cover 15 closes the flotation machine 10 and realizes automatic closure. During the closing process of the sealing cover 15, the cylinder 244 is always moving in the first arc-shaped groove 245, and when the sealing cover 15 covers the upper end of the flotation machine 10, the upper end surface of the horizontal side of the L-shaped block 222 is flush with the lower end surface of the horizontal side of the L-shaped insert 241; After the sealing cover 15 closes the flotation machine 10, the electromagnet 216 is de-energized, and the output shaft of the motor 211 continues to rotate. At this time, since the electromagnet 216 is de-energized, it will no longer drive the disc 214 to move, and no jamming will occur. At this time, the cylinder 244 enters the second arc-shaped groove 246. Since the distance between the second arc-shaped groove 246 and the center point of the output shaft of the motor 211 decreases as the disc 214 rotates clockwise, when the disc 214 rotates counterclockwise, it can drive the cylinder 244 to move toward the center position of the transmission ring 213, so that the cylinder 244 moves toward the center position of the transmission ring 213, so that the bearing block 243 drives the movable frame 23 to move toward the transmission ring 213, and the L-shaped insert 241 moves toward the L-shaped block 222, so that the lower end surface of the L-shaped insert 241 abuts against the upper end surface of the L-shaped block 222, preventing the L-shaped block 222 from loosening and ensuring the stability of the sealing cover 15.

[0040] In summary, by setting a limiting mechanism, when the output shaft of the motor 211 rotates to drive the sealing cover 15 to close the upper end of the flotation machine 10, the motor 211 can continue to rotate and cooperate with the transmission to drive the movable frame 23 to move toward the transmission ring 213, driving the lower end face of the L-shaped plug 241 to abut against the upper end face of the L-shaped block 222, thereby limiting the L-shaped block 222 and preventing the sealing cover 15 from opening automatically.

[0041] Example 3, reference Figures 1 to 8 , which is the third embodiment of the present invention. Unlike the previous embodiment, based on the second embodiment, this embodiment provides a sealing mechanism for a waste liquid circulation treatment system for low-fat condensed milk production, which solves the problem of how to seal the strip opening 16 to prevent leakage of pungent odor. The sealing mechanism includes a sealing assembly 30, including a mounting cavity 301 provided in the sealing cover 15, a pair of removal openings 302 cooperating with the strip opening 16 provided in the mounting cavity 301, and sealing blocks 303 cooperating with the pipe 11 are slidably connected to the pair of removal openings 302. The sealing blocks 303 are L-shaped, and the two sealing blocks 303 are provided with semicircular openings 304 cooperating with the pipe 11. Specifically, the distance between the vertical side of the sealing block 303 and the removal port 302 is greater than half the width of the strip port 16, thereby ensuring that there is sufficient movement distance for the two sealing blocks 303 to offset each other. An elastic rubber ring is also provided on the inner wall of the semicircular port 304 to ensure the sealing effect when the pipe 11 and the sealing block 303 cooperate.

[0042] Furthermore, the power assembly 31 includes an L-shaped extension plate 311 fixedly connected to the left end sealing block 303, a through hole for the extension plate 311 to pass through is provided on the sealing cover 15, the extension plate 311 extends to the outside of the through hole, a carrier is fixedly connected to the mounting frame, a connecting block 312 is rotatably connected to the carrier through a support shaft, the connecting block 312 is fixedly connected to the extension plate 311, a support shaft is fixedly connected in the mounting cavity 301, a gear 313 is rotatably connected to the support shaft, and an L-shaped gear is fixedly connected to the right end sealing block 303. The movable plate 314, the movable plate 314 and the extension plate 311 are fixedly connected with meshing teeth 315 that mesh with the gear 313; the horizontal side of the extension plate 311 and the horizontal side of the movable plate 314 are arranged in an upper and lower position, and the distance between the vertical side of the extension plate 311 and the horizontal side of the movable plate 314 is greater than half the width of the strip opening 16. The setting of the through opening can guide the extension plate 311, and the horizontal side of the extension plate 311 and the horizontal side of the movable plate 314 are respectively arranged on the upper and lower sides of the gear 313 to allow the meshing teeth 315 to mesh with the gear 313.

[0043] When in use, during the movement of the moving frame 23, the connecting block 312 can also be driven to move, so that the extension plate 311 moves toward the transmission ring 213, so that the sealing block 303 at the left end moves toward the strip opening 16. At the same time as the extension plate 311 moves, the meshing teeth 315 on the extension plate 311 mesh with the gear 313, driving the gear 313 to rotate clockwise, and cooperating with the meshing teeth 315 on the moving plate 314, driving the moving plate 314 to move toward the strip opening 16. When the semicircular openings 304 on the two sealing blocks 303 cooperate with the pipe 11, the strip opening 16 can be automatically sealed. , which makes the sealing effect better and further avoids the leakage of irritating odors. An elastic rubber ring is also provided on the inner wall of the semicircular opening 304 here, which ensures the sealing effect on the one hand and can be applicable to pipes 11 of different diameters within a certain range on the other hand. It is worth noting that multiple strip openings 16 and pipes 11 can be provided here, and it is only necessary to provide multiple sealing blocks 303 that cooperate with the strip openings 16. It is worth noting that the connecting block 312 here is rotatably connected to the supporting frame on the movable frame 23, so that when the sealing cover 15 is opened, there will be no jamming between the connecting block 312 and the movable frame 23.

[0044] In summary, by setting up a sealing mechanism, when the movable frame 23 moves to drive the L-shaped plug block 241 to cooperate with the L-shaped block 222, it can also drive the two sealing blocks 303 to cooperate with the strip opening 16, and the two semicircular openings 304 are against the side wall of the pipe 11 to seal the strip opening 16, thereby ensuring the sealing effect of the sealing cover 15.

[0045] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A waste liquid recycling treatment system for low-fat condensed milk production, characterized by: include, A sealing mechanism, comprising an air floatation machine (10), a pipe (11) arranged on the air floatation machine (10), a pair of support blocks (12) fixedly connected to the air floatation machine (10), a rotating shaft (13) rotatably connected between the pair of support blocks (12), an adapter block (14) fixedly connected to the rotating shaft (13), a sealing cover (15) fixedly connected to the adapter block (14), the sealing cover (15) deflecting to seal the upper end of the air floatation machine (10), a strip-shaped opening (16) cooperating with the pipe (11) provided on the sealing cover (15), and a purification component (17) for purifying gas provided on the sealing cover (15); A limiting mechanism, comprising a tripod (20) arranged on the side wall of the air flotation machine (10), the tripod (20) being provided with a transmission assembly (21) for providing power to the rotating shaft (13), the air flotation machine (10) being provided with a snap assembly (22) cooperating with the sealing cover (15), a moving frame (23) being slidably connected to the side wall of the air flotation machine (10), and the moving frame (23) being provided with an anti-loosening assembly (24) for preventing the snap assembly (22) from loosening; The sealing mechanism comprises a sealing assembly (30) arranged in the strip-shaped opening (16); the movable frame (23) is provided with a power assembly (31) for providing power to the sealing assembly (30).

2. The waste liquid circulation treatment system for low-fat condensed milk production according to claim 1, wherein: The purification component (17) includes an opening provided on the sealing cover (15), a mounting tube (171) with upper and lower ends open is fixedly connected in the opening, an activated carbon layer (172) is provided in the mounting tube (171), a support ring (173) is threadedly connected to the upper end of the mounting tube (171), and a stop ring (174) is fixedly connected to the lower end of the mounting tube (171).

3. The waste liquid circulation treatment system for low-fat condensed milk production according to claim 2, wherein: The transmission assembly (21) includes a motor (211) fixedly connected to a tripod (20), three support plates (212) fixedly connected to the output shaft of the motor (211), a transmission ring (213) fixedly connected to the support plate (212) (12), a front end of the rotating shaft (13) passes through the support plate (212) (12) and is rotatably connected to the support plate (212) (12), a disc (214) fixedly connected to the rotating shaft (13), a notch (215) provided on the disc (214), an electromagnet (216) fixedly connected to the transmission ring (213), and an iron block (217) that cooperates with the electromagnet (216) fixedly connected to the inner wall of the notch (215).

4. The waste liquid recycling treatment system for low-fat condensed milk production according to claim 3, wherein: The engaging assembly (22) comprises an L-shaped opening (221) provided on the air floatation machine (10), and an L-shaped block (222) cooperating with the L-shaped opening (221) is fixedly connected to the sealing cover (15).

5. The waste liquid circulation treatment system for low-fat condensed milk production according to claim 4, characterized in that: The anti-loosening component (24) includes an L-shaped plug-in block (241) fixedly connected to the installation frame, and the L-shaped plug-in block (241) translates and cooperates with the L-shaped block (222) to prevent the L-shaped block (222) from loosening. The air floatation machine (10) is fixedly connected to a U-shaped sleeve (242) and a guide movable frame (23). The right end of the installation frame is fixedly connected to an L-shaped bearing block (243), and a cylinder (244) is fixedly connected to the bearing block (243). The transmission ring (213) is provided with a first arc groove (245), and the first arc groove (245) is connected to a second arc groove (246). The first arc groove (245) and the second arc groove (246) cooperate with the cylinder (244), and the distance between the second arc groove (246) and the center point of the output shaft of the motor (211) decreases in the clockwise direction along the transmission ring (213).

6. The waste liquid recycling treatment system for low-fat condensed milk production according to claim 5, characterized in that: The arc length of the notch (215) is equal to the single-side arc length of the first arc-shaped groove (245), and the arc length of the notch (215) is greater than the single-side arc length of the second arc-shaped groove (246).

7. The waste liquid recycling treatment system for low-fat condensed milk production according to claim 6, wherein: The sealing assembly (30) comprises an installation cavity (301) provided in the sealing cover (15), wherein a pair of removal openings (302) cooperating with the strip opening (16) are provided in the installation cavity (301), and a sealing block (303) cooperating with the pipe (11) is slidably connected to each of the pair of removal openings (302).

8. The waste liquid recycling treatment system for low-fat condensed milk production according to claim 7, characterized in that: The sealing blocks (303) are L-shaped, and two of the sealing blocks (303) are provided with semicircular openings (304) that cooperate with the pipes (11).

9. The waste liquid circulation treatment system for low-fat condensed milk production according to claim 7 or 8, characterized in that: The power assembly (31) includes an L-shaped extension plate (311) fixedly connected to the left end sealing block (303); the sealing cover (15) is provided with a through-hole for the extension plate (311) to pass through, and the extension plate (311) extends to the outside of the through-hole; the mounting frame is fixedly connected to a carrier frame, and the carrier frame is rotatably connected to a connecting block (312) via a support shaft; the connecting block (312) is fixedly connected to the extension plate (311); a support shaft is fixedly connected in the mounting cavity (301), and a gear (313) is rotatably connected to the support shaft; an L-shaped movable plate (314) is fixedly connected to the right end sealing block (303); and meshing teeth (315) that mesh with the gear (313) are fixedly connected to both the movable plate (314) and the extension plate (311).

10. The waste liquid circulation treatment system for low-fat condensed milk production according to claim 9, characterized in that: The horizontal side of the extension plate (311) and the horizontal side of the movable plate (314) are arranged in an upper and lower position, and the distance between the vertical side of the extension plate (311) and the horizontal side of the movable plate (314) is greater than half the width of the strip opening (16).

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