A flotation separation device and usage method for light and heavy residues of kitchen waste

Abstract

The present invention discloses a flotation separation device for heavy and light residues of kitchen waste, which comprises: a treatment tank, one side of which is communicated with a water inlet pipe; a side channel arranged on one side of the treatment tank, and a feed pipe is communicated on the side channel for conveying the kitchen waste material; an upper shelf plate horizontally erected above the treatment tank, a stirring shaft is vertically and relatively rotatably arranged on the upper shelf plate, and a driving motor is fixed on the upper shelf plate, and the output end of the driving motor is fixed to the stirring shaft; a side flow bin tangentially arranged on one side of the treatment tank, and a filter grille is arranged in the side flow bin; an outer connecting pipe erected on one side of the side flow bin and communicated with the side flow bin through a negative pressure pipe; a return pipe connected to the outer connecting pipe; a circulating drainage assembly arranged in the treatment tank, and a microbubble separation mechanism, one end of the return pipe is communicated with the microbubble separation mechanism, and a heavy residue discharge port is further arranged below the treatment tank.

Description

Technical Field

[0001] The present invention belongs to the technical field of kitchen waste treatment equipment, and specifically relates to a flotation separation device for light and heavy residues of kitchen waste and a usage method thereof. Background Art

[0002] Kitchen waste mainly refers to the waste generated in residents' daily lives, food processing, food service, unit meals, etc., including vegetable leaves, leftovers, rice, fruit peels, eggshells, tea dregs, bones, etc. Its main sources are household kitchens, restaurants, hotels, canteens, markets, and other industries related to food processing. Kitchen waste contains extremely high moisture and organic matter, is very easy to rot, and produces a foul smell. After proper treatment and processing, it can be converted into new resources. Currently, the main treatment methods for kitchen waste include landfilling, composting, heat treatment, and pulping anaerobic fermentation. To realize the subsequent pulping process for the light and heavy residues in kitchen waste, it is necessary to ensure the full separation of the light and heavy residues of kitchen waste. Although the existing flotation separation equipment can achieve the separation effect of light and heavy residues of kitchen waste under the action of centrifugation, there will still be some mixed impurities of light and heavy residues remaining and accumulating at the bottom. At the same time, the light residues are easily affected by the separation flow and float as a whole, resulting in poor separation effect.

[0003] Therefore, those skilled in the art have provided a flotation separation device for light and heavy residues of kitchen waste and a usage method thereof to solve the problems raised in the above background art. Summary of the Invention

[0004] To achieve the above object, the present invention provides the following technical solution: A flotation separation device for light and heavy residues of kitchen waste, which includes:

[0005] A treatment tank, one side of which is connected to a water inlet pipe;

[0006] A side channel is arranged on one side of the treatment tank, and a feed pipe is connected to the side channel for transporting the kitchen waste material;

[0007] An upper shelf plate is horizontally suspended above the treatment tank. A stirring shaft is vertically and rotatably arranged on the upper shelf plate, and a driving motor is fixed on the upper shelf plate. The output end of the driving motor is fixed to the stirring shaft;

[0008] A side flow bin is tangentially arranged on one side of the treatment tank, and a filter grille is arranged in the side flow bin;

[0009] An external connection pipe is erected on one side of the side flow bin and is connected to the side flow bin through a negative pressure pipe;

[0010] A return pipe is connected to the external connection pipe;

[0011] A circulating drainage component is arranged in the treatment tank for treating the flow of heavy residues at the side wall of the treatment tank, and

[0012] The microbubble separation mechanism is annularly embedded at the bottom of the treatment tank. One end of the reflux pipe is communicated with the microbubble separation mechanism, and a heavy slag discharge port is further arranged below the treatment tank.

[0013] Furthermore, preferably, the circulating drainage assembly includes:

[0014] A baffle plate, configured to be an annular structure. The cross-section of the baffle plate is an inverted < shape structure, and a plurality of standard holes are uniformly distributed on its end surface;

[0015] Circulation pipes, arranged in multiple groups. Each circulation pipe is coaxially arranged in the treatment tank. The cross-section of the circulation pipe is a C-shaped structure, and a plurality of through holes are opened on the circulation pipe;

[0016] Negative pressure pumps, arranged corresponding to the circulation pipes one by one, and vertically fixed on one side of the treatment tank;

[0017] Positive pressure pumps, arranged in parallel on one side of the negative pressure pumps. The negative pressure pumps and the positive pressure pumps are respectively communicated with both ends of the circulation pipes; and

[0018] An external connection pipe, correspondingly connected between the negative pressure pumps and the positive pressure pumps.

[0019] Furthermore, preferably, the radii of the circulation pipes are different from each other, and they are arranged in a stepped manner in the treatment tank, and the liquid flow rate in the relatively lower circulation pipe is greater than that in the relatively upper circulation pipe.

[0020] Furthermore, preferably, a plurality of inner pipes are also embedded in the circulation pipes. One end of each inner pipe is communicated with the negative pressure pump, and the lengths of the inner pipes are different.

[0021] Furthermore, preferably, the microbubble separation mechanism includes:

[0022] An outer shaft pipe, fixed in the treatment tank, and a plurality of outer holes are provided on the outer shaft pipe;

[0023] An inner flow pipe, annularly mounted in the outer shaft pipe, and the inner flow pipe is communicated with the reflux pipe;

[0024] Microbubble mixing devices, circumferentially distributed on the inner flow pipe; and

[0025] A diffusion plate, fixed between the outer shaft pipe and the inner flow pipe.

[0026] Further, as a preference, the cross-section of the diffusion plate is in an arc structure, and it is inclined at 30° between the outer shaft tube and the inner flow tube. Moreover, the microbubble mixing device is arranged in an inverted manner, so that the microbubbles are fully diffused vertically and obliquely.

[0027] Further, as a preference, the microbubble mixing device includes:

[0028] A jet pipe;

[0029] An air flow pipe bracket, which is embedded and fixed in the jet pipe. The air flow pipe bracket has a double-layer pipe body structure, and an air inlet pipe is vertically connected to one side thereof. The air inlet pipe is communicated with the annular cavity, and a plurality of micro air holes are provided on the inner wall of the annular part of the air flow pipe bracket;

[0030] An outer joint, which is communicated below the jet pipe.

[0031] Further, as a preference, a method for using a flotation separation device for light and heavy residues of kitchen waste includes the following steps:

[0032] Step 1, adding water and feeding materials; adding water to the treatment tank, starting the driving motor, and conveying the kitchen waste material body into the tank through the side channel to form a preliminary centrifugal separation;

[0033] Step 2, circulating heavy residue water; starting the negative pressure suction device and the positive pressure discharge device, and the heavy residue located at the side wall of the treatment tank can completely enter the circulation pipe along with the eddy current and converge at the bottom position of the treatment tank;

[0034] Step 3, circulating the backflow water; the external connection pipe pumps the filtered residue water in the treatment tank to the return pipe through the negative pressure pipe, so as to form an upward water flow in the treatment tank;

[0035] Step 4, injecting microbubbles; forming microbubbles at the bottom of the treatment tank through each microbubble mixing device, and the microbubbles carry the light residue material in the heavy residue during the upward movement.

[0036] Compared with the prior art, the beneficial effects of the present invention are:

[0037] In the present invention, the mainly arranged circulating drainage component can perform multiple circulating drainages on the heavy residue deposited at the bottom. On the one hand, it effectively ensures the full flow separation of the light and heavy residues. On the other hand, it cooperates with the microbubble separation mechanism to carry the floating light residue particles in the heavy residue by the microbubbles and fully float away with the upward water flow, further ensuring the separation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a schematic structural diagram of the present invention;

[0039] Figure 2 is a schematic structural diagram of the circulating drainage component in the present invention;

[0040] Figure 3 This is a schematic structural diagram of the circulating drainage component in the present invention;

[0041] Figure 4 This is a schematic structural diagram of the inner tube in the present invention;

[0042] Figure 5 This is a schematic structural diagram of the microbubble separation mechanism in the present invention;

[0043] Figure 6 This is a schematic structural diagram of the microbubble mixing device in the present invention;

[0044] In the figure: 1. Processing tank; 11. Upper shelf plate; 12. Feed pipe; 13. Driving motor; 14. Outer connecting pipe; 15. Negative pressure pipe; 16. Side flow chamber; 17. Return pipe; 2. Circulating drainage component; 21. Flow blocking plate; 22. Circulation pipe; 23. Negative pressure suction device; 24. Positive pressure discharge device; 25. Outer connection pipe; 26. Inner tube; 3. Microbubble separation mechanism; 31. Outer shaft tube; 32. Inner flow tube; 33. Diffusion plate; 4. Microbubble mixing device; 41. Jet pipe; 42. Air flow pipe rack; 43. Air inlet pipe; 44. Outer joint. Detailed implementation manners

[0045] Please refer to Figure 1 , in an embodiment of the present invention, a floating separation device for heavy and light residues of kitchen waste includes:

[0046] A processing tank 1, with a water inlet pipe connected to one side thereof;

[0047] A side channel, arranged on one side of the processing tank 1, and a feed pipe 12 is connected to the side channel for transporting the kitchen waste material;

[0048] An upper shelf plate 11, horizontally suspended above the processing tank 1, a stirring shaft is vertically and rotatably arranged on the upper shelf plate 11, and a driving motor 13 is fixed on the upper shelf plate, and the output end of the driving motor 13 is fixed to the stirring shaft;

[0049] A side flow chamber 16, tangentially arranged on one side of the processing tank 1, and a filter grille is provided in the side flow chamber 16;

[0050] An outer connecting pipe 14, erected on one side of the side flow chamber 16 and connected to the side flow chamber 16 through a negative pressure pipe 15;

[0051] A return pipe 17, connected to the outer connecting pipe 14; that is to say, the stirring shaft can realize the centrifugal separation of heavy and light residues in the processing tank under the action of centrifugal force, the liquid thrown into the side flow chamber under the action of centrifugal force is discharged after passing through the filter grille, and the outer connecting pipe can be transported back to the processing tank through the return pipe again to form an upward lifting force;

[0052] The circulating drainage assembly 2 is arranged in the treatment tank 1 and is used for treating the flow of heavy slag at the side wall of the treatment tank 1, and

[0053] The microbubble separation mechanism 3 is annularly embedded at the bottom of the treatment tank 1. One end of the return pipe 17 is communicated with the microbubble separation mechanism 3, and a heavy slag discharge port is also arranged below the treatment tank 1.

[0054] Refer to Figure 2 、 3 In this embodiment, the circulating drainage assembly 2 includes:

[0055] The baffle plate 21 is configured as an annular structure. The cross-section of the baffle plate 21 is an inverted < shape structure, and a plurality of standard holes are uniformly distributed on its end face;

[0056] The circulation pipes 22 are arranged in multiple groups. Each circulation pipe 22 is coaxially arranged in the treatment tank 1. The cross-section of the circulation pipe 22 is a C-shaped structure, and a plurality of through openings are formed on the circulation pipe 22;

[0057] The negative pressure suction device 23 is arranged corresponding to the circulation pipe 22 and is vertically fixed on one side of the treatment tank 1;

[0058] The positive pressure discharge device 24 is arranged in parallel on one side of the negative pressure suction device 23. The negative pressure suction device 23 and the positive pressure discharge device 24 are respectively communicated with both ends of the circulation pipe 22; and

[0059] The external connection pipe 25 is correspondingly communicated between the negative pressure suction device 23 and the positive pressure discharge device 24. That is to say, the negative pressure suction device cooperates with the positive pressure discharge to perform bottom circulation drainage on the heavy slag deposited at the bottom of the treatment tank, so as to cooperate with the microbubble separation mechanism to fully separate and carry the floating light slag in the liquid and improve the separation effect.

[0060] As a preferred embodiment, the radii of the circulation pipes 22 are different from each other and are arranged in a stepped manner in the treatment tank 1, and the liquid flow rate in the relatively lower circulation pipe 22 is greater than the liquid flow rate in the relatively upper circulation pipe 22, so as to be able to circulate and drain the heavy slag located on the side wall downward. At this time, the baffle plate effectively forms a heavy slag blocking and filtering effect.

[0061] Refer to Figure 4 In this embodiment, a plurality of inner pipes 26 are also embedded in the circulation pipe 22. One end of each inner pipe 26 is communicated with the negative pressure suction device 23, and the lengths of the inner pipes 26 are different, which is convenient for full flow circulation.

[0062] Refer to Figure 5 In this embodiment, the microbubble separation mechanism 3 includes:

[0063] The outer shaft tube 31 is fixed inside the treatment tank 1, and a plurality of outer holes are provided on the outer shaft tube 31;

[0064] The inner flow tube 32 is annularly arranged in the outer shaft tube 31, and the inner flow tube 32 is communicated with the return flow tube 17;

[0065] The microbubble mixing device 4 is circumferentially distributed on the inner flow tube 32; and

[0066] The diffusion plate 33 is fixed between the outer shaft tube 31 and the inner flow tube 32.

[0067] In this embodiment, the cross section of the diffusion plate 33 is in an arc structure and is inclined at 30° between the outer shaft tube 31 and the inner flow tube 32, and the microbubble mixing device 4 is arranged in an inverted manner, so that the microbubbles are fully diffused vertically and obliquely. That is to say, the microbubbles generated in the microbubble mixing device can carry the light slag in the liquid and float upward, avoiding the flow blockage caused by the accumulation of heavy slag at the bottom. At the same time, in cooperation with the diffusion plate, the microbubbles are diffused in the treatment tank to ensure that the floating light slag floats upward everywhere.

[0068] Refer to Figure 6 , as a preferred embodiment, the microbubble mixing device 4 includes:

[0069] The jet tube 41;

[0070] The air flow tube frame 42 is embedded and fixed in the jet tube 41. The air flow tube frame 42 has a double-layer tube body structure, and an air inlet tube 43 is vertically connected to one side thereof. The air inlet tube 43 is communicated with the annular cavity, and a plurality of micro air holes are provided on the inner ring wall of the air flow tube frame 42;

[0071] The outer joint 44 is communicated below the jet tube 41.

[0072] In this embodiment, a method for using a kitchen waste light and heavy slag flotation separation device includes the following steps:

[0073] Step 1, adding water and feeding materials; adding water to the treatment tank 1 and starting the drive motor 13, and conveying the kitchen waste material into the tank through the side channel to form a preliminary centrifugal separation;

[0074] Step 2, heavy slag water circulation; starting the negative pressure suction device 23 and the positive pressure discharge device 24, and the heavy slag located on the side wall of the treatment tank 1 can completely enter the circulation tube 22 along with the eddy current and converge at the bottom position inside the treatment tank 1;

[0075] Step 3, return water circulation; the external connection tube 14 pumps the filtered slag water in the treatment tank 1 to the return flow tube 17 through the negative pressure tube 15, so as to form an upward water flow in the treatment tank 1;

[0076] Step 4: Microbubble injection; Microbubbles are formed at the bottom of the treatment tank 1 through each microbubble mixing device 4, and the light slag material in the heavy slag is carried by the microbubbles during their upward movement.

[0077] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes should be covered within the protection scope of the present invention.

Claims

1. A flotation separation device for light and heavy residues of kitchen waste, characterized in that: It includes: A treatment tank (1) with a water inlet pipe connected to one side thereof; A side channel is arranged on one side of the treatment tank (1), and a feed pipe (12) is connected to the side channel for transporting kitchen waste materials; An upper shelf plate (11) is horizontally suspended above the treatment tank (1), and a stirring shaft is vertically and rotatably arranged on the upper shelf plate (11), and a driving motor (13) is fixed on the upper shelf plate, and the output end of the driving motor (13) is fixed to the stirring shaft; A side flow bin (16) is tangentially arranged on one side of the treatment tank (1), and a filter grille is arranged in the side flow bin (16); An external connecting pipe (14) is erected on one side of the side flow bin (16) and is connected to the side flow bin (16) through a negative pressure pipe (15); A reflux pipe (17) is connected to the external connecting pipe (14); A circulating drainage assembly (2) is arranged in the treatment tank (1) for treating the flow of heavy slag at the side wall of the treatment tank (1), and A microbubble separation mechanism (3) is annularly embedded at the bottom of the treatment tank (1), one end of the reflux pipe (17) is connected to the microbubble separation mechanism (3), and a heavy slag discharge port is also arranged below the treatment tank (1); The circulating drainage assembly (2) includes: A baffle plate (21) is configured in an annular structure, the cross-section of the baffle plate (21) is in an inverted < shape structure, and a plurality of standard holes are evenly distributed on its end surface; Circulation pipes (22) are arranged in multiple groups, and each of the circulation pipes (22) is coaxially arranged in the treatment tank (1), the cross-section of the circulation pipe (22) is in a C-shaped structure, and a plurality of through holes are formed in the circulation pipe (22); Negative pressure pumps (23) are arranged corresponding to the circulation pipes (22) one by one and are vertically fixed on one side of the treatment tank (1); Positive pressure pumps (24) are arranged in parallel on one side of the negative pressure pumps (23), and the negative pressure pumps (23) and the positive pressure pumps (24) are respectively connected to both ends of the circulation pipe (22); and An external connecting pipe (25) is correspondingly connected between the negative pressure pumps (23) and the positive pressure pumps (24); A plurality of inner pipes (26) are also embedded in the circulation pipe (22), one end of each inner pipe (26) is connected to the negative pressure pump (23), and the lengths of the inner pipes (26) are different; 2. The floatation separation equipment for light and heavy residues of kitchen waste according to claim 1, characterized in that: The radii of the circulation pipes (22) are different from each other and are arranged in a stepped manner in the treatment tank (1), and the liquid flow rate in the relatively lower circulation pipe (22) is greater than the liquid flow rate in the relatively upper circulation pipe (22); 3. A flotation separation device for light and heavy residues of kitchen waste according to claim 1, characterized in that: The microbubble separation mechanism (3) includes: An outer shaft pipe (31) is fixed in the treatment tank (1), and a plurality of outer holes are provided on the outer shaft pipe (31); An inner flow pipe (32) is annularly erected in the outer shaft pipe (31), and the inner flow pipe (32) is connected to the reflux pipe (17); Microbubble mixing devices (4) are circumferentially distributed on the inner flow pipe (32); and A diffusion plate (33) is fixed between the outer shaft pipe (31) and the inner flow pipe (32).

4. The kitchen waste light and heavy slag flotation separation equipment according to claim 3, characterized in that: The cross-section of the diffusion plate (33) is in an arc structure and is inclined at 30° and arranged between the outer shaft tube (31) and the inner flow tube (32). Moreover, the microbubble mixing device (4) is arranged in an upside-down manner, so that the microbubbles are fully diffused vertically and obliquely.

5. A flotation separation device for light and heavy residues of kitchen waste according to claim 3, characterized in that: The microbubble mixing device (4) includes: a jet pipe (41); an air flow pipe rack (42), which is embedded and fixed in the jet pipe (41). The air flow pipe rack (42) has a double-layer pipe body structure, and an air inlet pipe (43) is vertically connected to one side thereof. The air inlet pipe (43) is communicated with the annular cavity, and a plurality of micro air holes are arranged on the inner ring wall of the air flow pipe rack (42); an outer joint (44), which is communicated below the jet pipe (41).

6. The usage method of a flotation separation device for heavy and light residues of kitchen waste according to any one of claims 1 to 5, characterized in that: It includes the following steps: Step 1, adding water and feeding materials: Add water to the treatment tank (1), start the drive motor (13), and convey the kitchen waste material into the inner part through the side channel to form a preliminary centrifugal separation; Step 2, heavy slag water circulation: Start the negative pressure suction device (23) and the positive pressure discharge device (24). The heavy slag located at the side wall of the treatment tank (1) can completely enter the circulation pipe (22) along with the eddy current and converge at the bottom position inside the treatment tank (1); Step 3, return water circulation: The external connecting pipe (14) pumps the filtered slag water in the treatment tank (1) to the return pipe (17) through the negative pressure pipe (15), so as to form an upward water flow in the treatment tank (1); Step 4, microbubble injection: Microbubbles are formed at the bottom of the treatment tank (1) through each microbubble mixing device (4), and the microbubbles carry the light slag material in the heavy slag during the upward movement.

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