Maltodextrin waste residue treatment device and method

Abstract

The invention discloses a maltodextrin waste residue treatment device and method.The maltodextrin waste residue treatment device comprises a fermentation tank, a stirring shaft, a stirring paddle, a first driving mechanism and an air guide bin, the interior of the stirring shaft is hollow to form a first air channel, the interior of the stirring paddle is hollow to form a second air channel, the first air channel is communicated with the second air channel, and a plurality of aeration holes are formed in the stirring paddle; a connecting rod, a spring and a plurality of blocking blocks provided with air passing holes are arranged in the second air channel, the blocking blocks are connected in series through the connecting rod, the spring pulls the connecting rod to block the aeration holes through the blocking blocks, a pull rope is arranged in the first air channel, one end of the pull rope is fixedly connected with the connecting rod, the pull rope pulls the connecting rod to move horizontally, and the air guide bin is installed at the top of the stirring shaft. The air guide bin is rotationally connected with the stirring shaft, an air inlet pipe is arranged on the air guide bin, and an air inlet hole is formed in the stirring shaft. According to the method, the maltodextrin waste residues are subjected to pulse feed fermentation, the ineffective oxygen supply proportion is reduced, the problem of waste of a large amount of energy is solved, the environment is protected, and enterprise benefits are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of solid waste treatment, in particular to a device and method for treating maltodextrin waste residue. Background Art

[0002] The production of maltodextrin uses corn as raw material, and after slurry preparation, liquefaction, filtration, decolorization, concentration, and drying, the finished product is made. The sugar residue obtained by filtration after liquefaction contains unhydrolyzed starch, protein, dietary fiber, ash, fat, etc. Directly discarding it pollutes the environment. Using biological fermentation technology to process it into protein feed for utilization can reduce the cost of waste residue treatment and greatly improve the enterprise's benefits. The factors affecting fermentation efficiency include temperature, pH value, dissolved oxygen content, etc. Existing fermentation equipment usually uses multiple branch pipes at the bottom of the fermentation tank and cooperates with the stirring paddle above for aeration fermentation. The oxygen dissolution mixing effect of this method is poor and is not suitable for the fermentation of maltodextrin waste residue with complex components.

[0003] Patent 201910655177.8 discloses a modular aerobic fermentation aeration stirrer, which includes a hollow main shaft and stirring paddle blades connected thereto. The stirring paddle blades contain a closed air duct space composed of an air duct outer plate, an air duct inner plate, and an air duct cover plate. The air duct outer plate is evenly distributed with air outlet holes to realize the continuous aeration function of the air outlet holes during the stirring process of the stirring paddle blades. Although it improves the stirring oxygen dissolution effect to a certain extent, the air outlet holes of this stirrer are in an open state for a long time. After shutdown, the fermentation liquid of maltodextrin waste residue with a high solid content will enter the fermentation liquid through the air outlet holes, causing blockage problems. It can only continuously supply air to avoid this situation, resulting in a large proportion of ineffective oxygen supply and a large amount of energy waste problems.

[0004] How to ensure that the air outlet holes are not blocked during the efficient fermentation treatment of maltodextrin solid waste residue, while improving the aeration oxygen dissolution amount, saving energy, and reducing costs is the key point of research for enterprises. Summary of the Invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a device for treating maltodextrin waste residue to solve the problems of large proportion of ineffective oxygen supply and a large amount of energy waste caused by continuous aeration to avoid blockage of the air outlet holes by the reflux of the fermentation liquid during the existing waste residue fermentation process.

[0006] The object of the present invention is achieved by the following technical solutions: A maltodextrin waste residue treatment device, comprising a fermentation tank, a stirring shaft, stirring paddles, a first driving mechanism, and a gas guiding chamber. The inside of the stirring shaft is hollow to form a first air passage. The inside of the stirring paddle is hollow to form a second air passage. The stirring paddle is installed at the bottom of the stirring shaft, and the first air passage is communicated with the second air passage. A plurality of air holes are provided on the stirring paddle. A connecting rod, a spring, and a plurality of blocking blocks provided with air passing holes are arranged in the second air passage. The connecting rod strings the blocking blocks together. The spring pulls the connecting rod to block the air holes with the blocking blocks. A pull rope is arranged in the first air passage. One end of the pull rope is fixedly connected to the connecting rod, and the pull rope pulls the connecting rod to move horizontally. The gas guiding chamber is installed at the top of the stirring shaft. The gas guiding chamber is rotatably connected to the stirring shaft. An air inlet pipe is provided on the gas guiding chamber. An air inlet hole is provided on the stirring shaft. The air inlet hole communicates the first air passage with the inner chamber of the gas guiding chamber respectively. The first driving mechanism is used to drive the stirring shaft to rotate.

[0007] Preferably, a pulling mechanism is provided on the stirring shaft. The pulling mechanism is used to lift the pull rope upward so that the blocking block opens the air hole.

[0008] Preferably, the pulling mechanism includes an inner column head, an induction coil, and an iron core. The inner column head is fixedly connected to the top of the stirring shaft. A stepped hole is provided on the inner column head. The iron core is located at the bottom of the stepped hole. The induction coil is sleeved on the upper part of the iron core and is located in the upper part of the stepped hole. The pull rope passes through the stepped hole and is fixedly connected to the bottom of the iron core.

[0009] Preferably, an outer cylinder sleeve is provided on the inner column head. The outer cylinder sleeve is sleeved outside the inner column head and is rotatably connected to the inner column head. A cylindrical groove is provided at the center of the top of the outer cylinder sleeve. A negative connection coil and a positive connection terminal are provided in the groove. A positive wire and a negative wire are provided in the outer cylinder sleeve. One end of the induction coil passes through the inner column head to form a positive contact point. The other end of the induction coil passes through the inner column head to form a negative contact point. One end of the positive wire is in contact connection with the positive contact point. The other end of the positive wire is in contact connection with the positive connection terminal. One end of the negative wire is in contact connection with the negative contact point. The other end of the positive wire is in contact connection with the negative connection coil.

[0010] Preferably, the negative connection coil and the positive connection terminal are respectively rotatably connected to the outer cylinder sleeve. A second driving mechanism is provided on the fermentation tank. The second driving mechanism is used to drive the outer cylinder sleeve to rotate relative to the inner column head.

[0011] Preferably, the positive terminal is T-shaped, the positive terminal is inserted into the negative terminal coil, and an insulating sheet for separating contact is provided between the positive terminal and the negative terminal.

[0012] Preferably, a guide wheel is arranged in the first air duct. The guide wheel and the connecting rod are in the same plane. One end of the pull rope is connected to the connecting rod, and the other end of the pull rope bypasses the guide wheel and extends to the head end of the first air duct.

[0013] Preferably, the pulling mechanism is an electric push rod structure.

[0014] Preferably, one end of the spring is fixedly connected to the connecting rod, and the other end of the spring is fixedly connected to the end of the second air duct.

[0015] A method for treating maltodextrin waste residue includes the following steps:

[0016] S1. Dehydrate the maltodextrin waste residue through a belt dehydrator until the water content is 50-60%;

[0017] S2. Add a composite fermentation strain of Bacillus subtilis: yeast in a ratio of 2:1 according to 1-3% of the dry weight of the waste residue by mass;

[0018] S3. Control the fermentation temperature at 30-40°C, supply oxygen by pulse aeration, and the fermentation time is 4-5 days;

[0019] S4. Low-temperature dry the fermentation broth until the water content is less than 12%, and granulate it.

[0020] The present invention has the following advantages:

[0021] 1. By arranging air holes on the stirring paddle, the upward movement of the pull rope drives the connecting rod and the plug to move, realizing the opening of the air holes. While the stirring paddle rotates and stirs, aeration and oxygen supply are carried out, improving the dissolved oxygen content of the fermentation broth and the fermentation efficiency of the waste residue; when the pull rope is released, the plug blocks the air holes under the action of the spring, avoiding the complete blockage of the air holes by the backflow of the fermentation broth during the discharging process, reducing the ventilation duration, reducing the proportion of ineffective oxygen supply, and saving energy;

[0022] 2. By installing structures such as an inner plug head, an induction coil, an iron core, and an outer cylinder sleeve on the stirring shaft, the intermittent energization of the induction coil drives the movement of the iron core, thereby intermittently controlling the blocking and opening of the air holes, realizing the pulse aeration function of the fermentation broth. Compared with continuous ventilation, the aeration effect is improved, energy waste is reduced, and costs are saved;

[0023] 3. The stirring paddle and the outer cylinder sleeve are respectively driven to rotate by the first driving mechanism and the second driving mechanism. By controlling the rotation speed of the first driving mechanism, the number of aerations per unit time can be controlled. By controlling the rotation position of the second driving mechanism, the aeration point position in the fermentation broth can be controlled. The combination of the two realizes the precise control of the pulsed aeration function and improves the fermentation effect.

[0024] 4. By adding a composite strain to the maltodextrin waste residue for feed fermentation, the crude protein content is increased by 18 - 25%, and the cellulose degradation rate is 30%. This not only reduces the enterprise's waste treatment cost but also improves the enterprise's efficiency. Brief Description of the Drawings

[0025] Figure 1 is the overall three - dimensional structure schematic diagram of the embodiment of the present invention;

[0026] Figure 2 is the three - dimensional structure schematic diagram of the internal mechanism of the embodiment of the present invention;

[0027] Figure 3 is Figure 2 the semi - sectional structure schematic diagram;

[0028] Figure 4 is Figure 3 the enlarged structure schematic diagram at A in

[0029] Figure 5 is Figure 3 the enlarged structure schematic diagram at B in

[0030] In the figure, 1. fermentation tank; 2. discharge port; 3. feed port; 4. exhaust port; 5. stirring shaft; 6. stirring paddle; 7. first driving mechanism; 8. first air duct; 9. second air duct; 10. aeration hole; 11. air guide chamber; 12. intake pipe; 13. intake hole; 14. plug; 15. connecting rod; 16. air passing hole; 17. spring; 18. guide wheel; 19. pulling rope; 20. inner stud; 21. stepped hole; 22. iron core; 23. induction coil; 24. positive contact; 25. negative contact; 26. outer cylinder sleeve; 27. positive wire; 28. negative wire; 29. groove; 30. negative connection coil; 31. positive terminal; 32. insulating sheet; 33. second driving mechanism. Detailed Embodiments

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0032] Accordingly, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0033] As Figure 1 shown, a maltodextrin waste residue treatment device includes a fermentation tank 1, a stirring shaft 5, stirring paddles 6, a first driving mechanism 7, and an air guide chamber 11. A discharge port 2 is opened at the bottom of the fermentation tank 1, and the discharge port 2 is used to discharge the waste residue that has completed fermentation. A feed port 3 and an exhaust port 4 are opened at the top surface of the fermentation tank 1. The feed port 3 is used to feed the maltodextrin waste residue to be fermented, and the exhaust port 4 is used to discharge excess gases such as carbon dioxide. As Figure 2 , Figure 3 shown, the stirring shaft 5 is of a tubular structure, and its interior is hollow to form a cylindrical first air passage 8. The first air passage 8 is used to downwardly transport air containing a large amount of oxygen. The stirring paddle 6 has an appearance of a flat paddle blade structure, and its interior is hollow to form a cylindrical second air passage 9. The stirring paddle 6 is installed at the bottom of the stirring shaft 5 and is located at the bottom of the fermentation tank 1 to achieve stirring and mixing of the fermentation broth. The first air passage 8 is communicated with the second air passage 9. A plurality of air holes 10 are provided on the stirring paddle 6, and the air holes 10 are spaced along the axis of the blade of the stirring paddle 6. A large amount of air enters the second air passage 9 from the first air passage 8 and finally discharges from the air holes 10.

[0034] As Figure 4As shown in the figure, a connecting rod 15, a spring 17, and a plurality of blocking blocks 14 are installed in each second air duct 9. The blocking block 14 has a cylindrical structure, and the diameter of the blocking block 14 is equal to the diameter of the cylindrical second air duct 9. The circumferential surface of the blocking block 14 is in close contact with the inner surface of the second air duct 9. The blocking block 14 is restricted within the second air duct 9 and can slide left and right. Each blocking block 14 is provided with a gas-permitting vent hole 16. The length of each blocking block 14 is greater than the diameter of the air exposure hole 10. In this way, when the blocking block 14 is located above the air exposure hole 10, the blocking block 14 can block the gas from spraying out through the air exposure hole 10, that is, the effect of blocking the air exposure hole 10 is achieved. The connecting rod 15 connects the blocking blocks 14 in series for synchronously controlling the left and right sliding of the blocking blocks 14. The spring 17 is located at the end of the second air duct 9. One end of the spring 17 is fixedly connected to the connecting rod 15, and the other end of the spring 17 is horizontally fixedly connected to the bottom surface at the end of the second air duct 9. The contraction of the spring 17 pulls the connecting rod 15 to move to the right for blocking the air exposure hole 10 with the blocking block 14. A pull rope 19 and a guide wheel 18 are provided in the first air duct 8. The guide wheel 18 is rotatably connected to the inner wall of the first air duct 8 through a rotating shaft. The guide wheel 18 and the connecting rod 15 are located in the same plane. One end of the pull rope 19 is fixedly connected to the connecting rod 15, and the other end of the pull rope 19 bypasses the guide wheel 18 and extends to the head end of the first air duct 8. Pulling the pull rope 19 upward, the pull rope 19 will pull the connecting rod 15 to move horizontally under the action of the guide wheel 18, as Figure 3 shown, the air guide bin 11 is installed at the top of the stirring shaft 5. The air guide bin 11 is rotatably connected to the stirring shaft 5. An annular inner chamber is formed between the air guide bin 11 and the stirring shaft 5. An air inlet pipe 12 is installed on the air guide bin 11. The air inlet pipe 12 is used to introduce external air. A plurality of air inlet holes 13 are provided on the stirring shaft 5. The air inlet holes 13 are respectively communicated with the first air duct 8 and the inner chamber of the air guide bin 11. The first driving mechanism 7 includes a motor and a gear. The gear is sleeved outside the stirring shaft 5. The output end of the motor drives the stirring shaft 5 to rotate through gear meshing transmission.

[0035] A pulling mechanism is installed on the stirring shaft 5. The pulling mechanism is used to lift the pull rope 19 upward so that the blocking block 14 opens the air exposure hole 10. The pulling mechanism has various forms.

[0036] In some embodiments, the pulling mechanism is an electric push rod structure. The electric push rod is installed at the top of the stirring shaft 5. The output end of the electric push rod is fixedly connected to the pull rope 19. Starting the electric push rod can lift the pull rope 19 upward.

[0037] In some embodiments, as Figure 3 、 Figure 5As shown, the pulling mechanism includes an inner stud 20, an induction coil 23, and an iron core 22. The inner stud 20 is a cylindrical plastic structure. The bottom of the inner stud 20 is fixedly connected to the top of the stirring shaft 5. Three stepped holes 21 are provided on the inner stud 20. The iron core 22 is cylindrical, and the length of the iron core 22 is less than the height of the stepped hole 21. The iron core 22 is vertically located at the bottom of the stepped hole 21. The induction coil 23 is sleeved on the upper part of the iron core 22 and is located in the upper part of the stepped hole 21. The pull rope 19 passes through the stepped hole 21 and is fixedly connected to the bottom of the iron core 22. When the induction coil 23 is energized, the induction coil 23 generates a magnetic force to move the iron core 22 upward to the middle of the induction coil 23, realizing the function of pulling the pull rope 19 upward.

[0038] An outer cylinder sleeve 26 is installed on the inner stud 20. The outer cylinder sleeve 26 is sleeved outside the inner stud 20 and is also a plastic structure. The outer cylinder sleeve 26 is rotatably connected to the inner stud 20. A cylindrical groove 29 is provided at the center of the top of the outer cylinder sleeve 26. A negative connection coil 30 and a positive terminal 31 are arranged in the groove 29. The positive terminal 31 is T-shaped. The positive terminal 31 is inserted into the negative connection coil 30. An insulating sheet 32 for isolating contact is arranged between the positive terminal 31 and the negative terminal to prevent short circuit caused by their contact.

[0039] Three groups of positive wires 27 and negative wires 28 are installed inside the outer cylinder sleeve 26. The positive wires 27 and negative wires 28 are embedded inside the outer cylinder sleeve 26. One end of the induction coil 23 passes through the inner stud 20 to form a positive contact 24, and the other end of the induction coil 23 passes through the inner stud 20 to form a negative contact 25. One end of the positive wire 27 is in contact connection with the positive contact 24, and the other end of the positive wire 27 extends into the groove 29 and is in contact connection with the positive terminal 31. One end of the negative wire 28 is in contact connection with the negative contact 25, and the other end of the positive wire 27 extends into the groove 29 and is in contact connection with the negative connection coil 30.

[0040] The negative connection coil 30 and the positive terminal 31 are respectively rotatably connected to the outer cylinder sleeve 26. A second driving mechanism 33 is installed on the fermentation tank 1. The second driving mechanism 33 includes a motor and a gear. The gear is sleeved on the outer cylinder sleeve 26. The output end of the motor drives the outer cylinder sleeve 26 to rotate relative to the inner stud 20 through gear meshing transmission. The negative connection coil 30 and the positive terminal 31 are respectively externally connected with wires. During the rotation of the outer cylinder sleeve 26, the negative connection coil 30 and the positive terminal 31 are continuously in contact with the negative wire 28 and the positive wire 27, and the positive contact 24 and the negative contact 25 are intermittently in contact with the positive wire 27 and the negative wire 28.

[0041] Working principle: The positive terminal 31 and the negative terminal coil 30 are respectively externally connected with wires. Compressed air is connected to the air inlet pipe 12. High-pressure air sequentially passes through the air guide chamber 11 and the air inlet hole 13 and enters the first air passage 8, and then continues to move downward to the second air passage 9, passes through a plurality of air passing holes 16, and finally is temporarily stored in the second air passage 9. Synchronously, the first driving mechanism 7 is started to drive the stirring shaft 5 to rotate. The rotation of the stirring shaft 5 drives the stirring paddle 6 and the inner plug 20 to rotate. The rotating stirring paddle 6 realizes the mixing and stirring function of the fermentation broth. When the second driving mechanism 33 is not started, the outer cylinder sleeve 26 is fixed and the inner plug 20 rotates. When the inner plug 20 rotates to make the positive contact 24 contact with the positive wire 27 and the negative contact 25 contact with the negative wire 28, the induction coil 23 is energized. The magnetic force generated by the induction coil 23 pulls the iron core 22 upward. The iron core 22 drives the pull rope 19 upward. The pull rope 19 drives the connecting rod 15 to move leftward. The connecting rod 15 drives the plug 14 to move, realizing the opening of the aeration hole 10, and synchronously stretching the spring 17. The high-pressure gas in the second air passage 9 is quickly ejected, realizing the aeration and oxygen supply function for the fermentation broth. The inner plug 20 continues to rotate, the positive contact 24 is disconnected from the positive wire 27, and the negative contact 25 is disconnected from the negative wire 28. After the induction coil 22 is powered off and no magnetic force is generated, the spring 17 sequentially pulls the plug 14, the connecting rod 15, the pull rope 19, and the iron core 22 to move until the iron core 22 is blocked by the stepped hole 21 and further movement is blocked. At this time, the plug 14 realizes the closing of the aeration hole 10. The stirring shaft 5 rotates continuously, the induction coil 23 is continuously powered on and off, and the plug 14 continuously opens and closes the aeration hole 10, realizing the pulse aeration function of the fermentation broth; since the outer cylinder sleeve 26 does not rotate, the stirring paddle 5 can only achieve the pulse aeration function when it rotates to a certain position, and the aeration effect is poor. To solve this problem, the second driving mechanism 33 is started. The second driving mechanism 33 drives the outer cylinder sleeve 26 to rotate. The rotation of the outer cylinder sleeve 26 will change the position when the induction coil 23 is energized, and thus change the position of the pulse aeration point in the fermentation broth, realizing the pulse aeration function at any position and improving the pulse aeration effect; compared with continuous ventilation, in pulse aeration, the high-pressure instantaneous airflow in pulse aeration generates violent eddies, making the bubbles break into finer ones (diameter < 0.5 mm), increasing the gas-liquid contact area by 40 - 60%, and intermittent aeration avoids the continuous rise and merger of bubbles in the continuous airflow, maintaining the proportion of small bubbles (> 70%), and the oxygen mass transfer coefficient is increased to 200 - 300 h -1 , Pulse aeration can reduce the ineffective oxygen supply time and reduce the energy consumption by 30 - 50%.

[0042] A method for treating maltodextrin waste residue, comprising the following steps,

[0043] S1. Dehydrate the maltodextrin waste residue with an initial moisture content of 60 - 80% to a moisture content of 50 - 60% through a belt dehydrating agent. Too high moisture content will lead to anaerobic corruption, and too low moisture content will inhibit the microbial activity;

[0044] S2. Add Bacillus subtilis: yeast composite fermentation strains at a ratio of 2:1 according to 1-3% of the dry weight of the waste residue, and put them into the fermentation tank;

[0045] S3. Control the fermentation temperature at 30-40 °C, and supply oxygen by pulsed aeration at 0.1-0.3 m 3 / min·m 3 , and the fermentation time is 4-5 days;

[0046] S4. Low-temperature dry the fermentation broth at 60 °C until the moisture content is less than 12%, and granulate it into 3-5 mm particles.

[0047] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A maltodextrin waste residue treatment device, characterized in that: Including a fermentation tank (1), a stirring shaft (5), stirring paddles (6), a first driving mechanism (7), and an air guiding chamber (11). The inside of the stirring shaft (5) is hollow to form a first air passage (8). The inside of the stirring paddle (6) is hollow to form a second air passage (9). The stirring paddle (6) is installed at the bottom of the stirring shaft (5), and the first air passage (8) communicates with the second air passage (9). A plurality of air holes (10) are provided on the stirring paddle (6). A connecting rod (15), a spring (17), and a plurality of blocking blocks (14) provided with air passing holes (16) are arranged in the second air passage (9). The connecting rod (15) strings the blocking blocks (14) together. The spring (17) pulls the connecting rod (15) to block the air holes (10) with the blocking blocks (14). A pulling rope (19) is arranged in the first air passage (8). One end of the pulling rope (19) is fixedly connected to the connecting rod (15), and the pulling rope (19) pulls the connecting rod (15) to move horizontally. The air guiding chamber (11) is installed at the top of the stirring shaft (5). The air guiding chamber (11) is rotatably connected to the stirring shaft (5). An air inlet pipe (12) is provided on the air guiding chamber (11). An air inlet hole (13) is provided on the stirring shaft (5). The air inlet hole (13) communicates the first air passage (8) with the inner chamber of the air guiding chamber (11). The first driving mechanism (7) is used to drive the stirring shaft (5) to rotate.

2. The maltodextrin waste residue treatment device according to claim 1, wherein: A pulling mechanism is provided on the stirring shaft (5). The pulling mechanism is used to lift the pulling rope (19) upward so that the blocking block (14) opens the air hole (10).

3. The maltodextrin waste residue treatment device according to claim 2, wherein: The pulling mechanism includes an inner column head (20), an induction coil (23), and an iron core (22). The inner column head (20) is fixedly connected to the top of the stirring shaft (5). A stepped hole (21) is provided on the inner column head (20). The iron core (22) is located at the bottom of the stepped hole (21). The induction coil (23) is sleeved on the upper part of the iron core (22) and is located in the upper part of the stepped hole (21). The pulling rope (19) passes through the stepped hole (21) and is fixedly connected to the bottom of the iron core (22).

4. The maltodextrin waste residue treatment device according to claim 3, wherein: An outer cylinder sleeve (26) is provided on the inner column head (20). The outer cylinder sleeve (26) is sleeved outside the inner column head (20) and is rotatably connected to the inner column head (20). A cylindrical groove (29) is provided at the center of the top of the outer cylinder sleeve (26). A negative connection coil (30) and a positive connection terminal (31) are provided in the groove (29). A positive wire (27) and a negative wire (28) are provided in the outer cylinder sleeve (26). One end of the induction coil (23) passes through the inner column head (20) to form a positive contact point (24), and the other end of the induction coil (23) passes through the inner column head (20) to form a negative contact point (25). One end of the positive wire (27) is in contact connection with the positive contact point (24), and the other end of the positive wire (27) is in contact connection with the positive connection terminal (31). One end of the negative wire (28) is in contact connection with the negative contact point (25), and the other end of the positive wire (27) is in contact connection with the negative connection coil (30).

5. A maltodextrin waste residue treatment device according to claim 4, characterized in that: The negative connection coil (30) and the positive connection terminal (31) are respectively rotatably connected to the outer cylinder sleeve (26). A second driving mechanism (33) is provided on the fermentation tank (1). The second driving mechanism (33) is used to drive the outer cylinder sleeve (26) to rotate relative to the inner column head (20).

6. The maltodextrin waste residue treatment device according to claim 5, characterized in that: The positive connection terminal (31) is T-shaped. The positive connection terminal (31) is inserted into the negative connection coil (30). An insulating sheet (32) for blocking contact is provided between the positive connection terminal (31) and the negative connection terminal.

7. A maltodextrin waste residue treatment device according to claim 1, characterized in that: A guide wheel (18) is provided in the first air duct (8). The guide wheel (18) and the connecting rod (15) are in the same plane. One end of the pull rope (19) is connected to the connecting rod (15), and the other end of the pull rope (19) bypasses the guide wheel (18) and extends to the head end of the first air duct (8).

8. A maltodextrin waste residue treatment device according to claim 2, characterized in that: The pulling mechanism is an electric push rod structure.

9. A maltodextrin waste residue treatment device according to claim 1, characterized in that: One end of the spring (17) is fixedly connected to the connecting rod (15), and the other end of the spring (17) is fixedly connected to the end of the second air duct (9).

10. A method for treating maltodextrin waste residue, based on the device described in claims 1-9, characterized in that, It includes the following steps S1. Dehydrate the maltodextrin waste residue through a belt dehydrator to a moisture content of 50-60%; S2. Add a composite fermentation strain of Bacillus subtilis: yeast at a ratio of 2:1 according to 1-3% of the dry weight of the waste residue by mass; S3. Control the fermentation temperature at 30-40°C, supply oxygen by pulsed aeration, and the fermentation time is 4-5 days; S4. Low-temperature dry the fermentation broth to a moisture content of less than 12% and granulate it.

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