Kitchen waste biogas residue pretreatment device

Abstract

The utility model relates to the technical field of garbage treatment, and discloses a kitchen garbage biogas residue pretreatment device which comprises a machine body, a screw extruder is arranged in the machine body, a liquid discharge pipe is embedded in the bottom of the machine body, a cylindrical filter screen is rotatably arranged in the machine body, and filter holes are uniformly formed in the cylindrical filter screen at equal intervals. A liquid outlet part of the screw extruder is located in the cylindrical filter screen, a driving mechanism is arranged in the machine body, two fixing blocks are fixedly mounted in the machine body, and an inner wall cleaning mechanism and a filter hole cleaning mechanism are arranged between the two fixing blocks. Through an efficient solid-liquid separation technology and an automatic inner wall and filter hole cleaning mechanism, the frequency and strength of manual maintenance are remarkably reduced, the labor cost is reduced, the service life of equipment is prolonged, and the treatment efficiency and reliability are improved.

Description

Technical Field

[0001] This utility model relates to the field of waste treatment technology, specifically to a pretreatment device for kitchen waste biogas residue. Background Technology

[0002] With the acceleration of urbanization, the amount of food waste generated is increasing year by year. Traditional food waste treatment methods are inefficient and have low resource recycling rates, which have a certain impact on the environment. Using biotechnology to treat food waste has become one of the research hotspots. Among them, anaerobic digestion technology has received widespread attention because it can effectively reduce waste volume and produce biogas. In order to ensure the fermentation effect, food waste pretreatment is required first.

[0003] A patent document with publication number CN218742185U discloses a pre-treatment device for kitchen waste, including a waste treatment bin. A filter assembly is fixedly connected to the left end of the inner side of the waste treatment bin, and a drying assembly is fixedly connected to the right end of the inner side of the waste treatment bin. The filter assembly includes a drive motor and a filter box. The output shaft of the drive motor is fixedly connected to a first crushing roller. A drive wheel is sleeved on the outer side of the right end of the first crushing roller. A belt is driven through the outer wall of the drive wheel. A driven wheel is driven through the inner wall of the belt on the side away from the drive wheel. A second crushing roller is sleeved on the inner wall of the driven wheel.

[0004] However, the above-mentioned device has the following problems when in use: because kitchen waste contains a lot of food residue, grease and other impurities, these substances are easy to adhere to the filter screen during the processing, causing the filter screen to become clogged. Once the filter screen is clogged, it will affect the normal operation of the equipment and reduce the processing efficiency. The solution of the device is to manually pull out the filter screen for cleaning after the machine is stopped. This method is not only inefficient, but also increases labor costs and equipment downtime. Utility Model Content

[0005] The purpose of this invention is to solve the problems existing in the prior art by proposing a pretreatment device for kitchen waste sludge, which can effectively unclog the filter holes and improve the efficiency of use.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A pretreatment device for kitchen waste sludge includes a body, inside which a screw extruder is installed. A drain pipe is embedded in the bottom of the body. A cylindrical filter screen is rotatably installed inside the body. Filter holes are evenly spaced on the cylindrical filter screen. The outlet of the screw extruder is located inside the cylindrical filter screen. A drive mechanism is installed inside the body. Two fixed blocks are fixedly installed inside the body. An inner wall cleaning mechanism and a filter hole cleaning mechanism are arranged between the two fixed blocks.

[0008] Preferably, the drive mechanism includes a drive motor, a rotating shaft, and mounting rings. The drive motor is mounted on the machine body. The output end of the drive motor shaft is fixedly connected to one of the rotating shafts. There are two rotating shafts, and a synchronous belt connects the two rotating shafts through pulleys. A drive wheel is fixedly mounted on the rotating shaft. There are two mounting rings, which are fixedly mounted at the beginning and end of the cylindrical filter screen, respectively. The mounting rings have fitting grooves that are adapted to the drive wheels.

[0009] Preferably, the inner wall cleaning mechanism includes a heating strip, which is fixedly installed between two fixed blocks. A heat-conducting scraper is fixedly installed on the heating strip, and the heat-conducting scraper directly abuts against the inner wall of the cylindrical filter screen.

[0010] Preferably, the filter cleaning mechanism includes a fixing strip and an mounting strip. The fixing strip is fixedly mounted on a fixing block, and the mounting strip is slidably mounted on the fixing block. Cleaning rods are evenly and equidistantly fixedly mounted on the side of the mounting strip facing the cylindrical filter screen. A cylinder is provided on the fixing strip, and the output end of the cylinder is fixedly connected to the mounting strip.

[0011] Preferably, the distance between adjacent cleaning rods is the same as the distance between adjacent filter holes on the cylindrical filter screen.

[0012] Preferably, the heating strip and heat-conducting scraper are located inside the cylindrical filter screen, while the fixing strip and mounting strip are located outside the cylindrical filter screen.

[0013] Preferably, an operating door is rotatably mounted on the machine body, and a handle is fixedly mounted on the operating door. The bottom surface of the operating door is lower than the lowest point of the cylindrical filter screen.

[0014] Preferably, a material inlet is embedded in the machine body, and the material inlet is located directly above the input end of the screw extruder.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] This invention achieves the conversion of the contact surface through the rotation of the cylindrical filter screen. When the initial surface is blocked, the cylindrical filter screen rotates, so that the clean surface is directly below the screw extruder, ensuring the long-term stable operation of the equipment. At the same time, the heating strip and heat-conducting scraper in the inner wall cleaning mechanism can effectively remove the residue on the inner wall of the cylindrical filter screen, while the cleaning rod in the filter hole cleaning mechanism is driven by the cylinder to periodically pass through the filter hole to remove the blockage and ensure that the filter hole is unobstructed, thereby greatly improving the cleaning efficiency and processing capacity of the equipment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a pretreatment device for kitchen waste biogas residue proposed in this utility model;

[0018] Figure 2This is a schematic diagram of the drive mechanism of a pretreatment device for kitchen waste biogas residue proposed in this utility model;

[0019] Figure 3 This is a schematic diagram of the internal structure of a pretreatment device for kitchen waste biogas residue proposed in this utility model;

[0020] Figure 4 This is a schematic diagram of the inner wall cleaning mechanism and filter hole cleaning mechanism of the pretreatment device for kitchen waste biogas residue proposed in this utility model.

[0021] In the diagram: 1. Machine body; 2. Inlet; 3. Drive motor; 4. Operating door; 5. Handle; 6. Drain pipe; 7. Rotating shaft; 8. Synchronous belt; 9. Drive wheel; 10. Mounting ring; 11. Adaptor groove; 12. Cylindrical filter screen; 13. Fixing block; 14. Fixing strip; 15. Screw extruder; 16. Cylinder; 17. Mounting strip; 18. Cleaning rod; 19. Heating strip; 20. Heat-conducting scraper. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Please see Figures 1 to 4 A pretreatment device for kitchen waste sludge includes a body 1, inside which a screw extruder 15 is installed. The screw extruder 15 is used to extrude the incoming kitchen waste to achieve solid-liquid separation. The solid part is extruded into sludge, and the liquid part is discharged through the liquid outlet. Since this is prior art, the internal structure of the screw extruder 15 is not described in detail here. The liquid discharge pipe 6 is used to discharge the liquid filtered from the cylindrical filter screen 12 out of the device to ensure that the liquid does not accumulate in the body 1. Preferably, the liquid discharge pipe 6 should be equipped with an electrically controlled valve (not shown in the figure).

[0024] A cylindrical filter screen 12 is installed inside the machine body 1. The cylindrical filter screen 12 has filter holes that are evenly spaced. The sparseness shown in the figure is only for illustration and can be adjusted as needed.

[0025] The liquid outlet of the screw extruder 15 is located inside the cylindrical filter screen 12. The filter holes allow the liquid to pass through while blocking solid substances, thus achieving further solid-liquid separation. The liquid extruded by the screw extruder 15 falls completely onto the bottom surface of the cylindrical filter screen 12. Since the cylindrical filter screen 12 can rotate, the surface of the cylindrical filter screen 12 in contact with the liquid can be adjusted. When the initial surface is blocked, by rotating the cylindrical filter screen 12, the clean surface can be positioned directly below the screw extruder 15, thereby ensuring that the equipment can be used stably for a long time, reducing the frequency of cleaning, and improving efficiency.

[0026] The machine body 1 is equipped with a drive mechanism that enables stable rotation. Two fixed blocks 13 are fixedly installed inside the machine body 1. An inner wall cleaning mechanism and a filter hole cleaning mechanism are arranged between the two fixed blocks 13. The fixed blocks 13 are used to fix and support the inner wall cleaning mechanism and the filter hole cleaning mechanism to ensure their stability and effectiveness.

[0027] The drive mechanism includes a drive motor 3, a rotating shaft 7, and a mounting ring 10. The drive motor 3 is mounted on the body 1. The output end of the shaft of the drive motor 3 is fixedly connected to one of the rotating shafts 7. There are two rotating shafts 7. The two rotating shafts 7 are connected by a synchronous belt 8 through a pulley. A drive wheel 9 is fixedly mounted on the rotating shaft 7. The start of the drive motor 3 can make the rotating shaft 7 connected to it rotate. Through the driving action of the synchronous belt 8, the two rotating shafts 7 rotate synchronously, causing the drive wheel 9 on the rotating shaft 7 to rotate.

[0028] Preferably, the transmission method between the pulley and the synchronous belt 8 can be chain drive or gear drive to ensure the stability of the synchronous belt 8 and avoid slippage.

[0029] There are two mounting rings 10, which are fixedly installed at the beginning and end of the cylindrical filter screen 12 respectively. The mounting rings 10 are provided with matching grooves 11 that are adapted to the drive wheel 9. The matching grooves 11 cooperate with the drive wheel 9 to ensure that the cylindrical filter screen 12 rotates smoothly and reliably.

[0030] Preferably, the contact portion between the drive wheel 9 and the adapter groove 11 can be made by meshing teeth and grooves to ensure the stability of the rotational motion of the cylindrical filter screen 12.

[0031] The inner wall cleaning mechanism includes a heating strip 19, which is fixedly installed between two fixed blocks 13. A heat-conducting scraper 20 is fixedly installed on the heating strip 19, and the heat-conducting scraper 20 directly abuts against the inner wall of the cylindrical filter screen 12.

[0032] The heat-conducting scraper 20 can effectively scrape off the substances adhering to the cylindrical filter screen 12, improving the cleanliness of the inner wall of the cylindrical filter screen 12. When a thorough cleaning is performed, the heating strip 19 is heated. As the space around the heating strip 19 heats up, the heating strip 19 smoothly transfers heat to the heat-conducting scraper 20, thereby heating the heat-conducting scraper 20. This causes the grease adhering to the inner wall of the cylindrical filter screen 12 to melt and drip off, further removing residues from the inner wall and preventing blockage.

[0033] The filter cleaning mechanism includes a fixing strip 14 and an mounting strip 17. The fixing strip 14 is fixedly mounted on the fixing block 13, and the mounting strip 17 is slidably mounted on the fixing block 13. Cleaning rods 18 are evenly and equidistantly fixedly mounted on the side of the mounting strip 17 facing the cylindrical filter screen 12. A cylinder 16 is provided on the fixing strip 14, and the output end of the cylinder 16 is fixedly connected to the mounting strip 17.

[0034] When the filter holes of the cylindrical filter screen 12 are completely clogged and need to be cleaned, the cylinder 16 is activated. The cylinder 16 drives the mounting strip 17 to slide, so that the cleaning rod 18 passes through the filter hole and removes the blockage in the filter hole. By rotating the cylindrical filter screen 12 at the same angle, the filter holes at different positions on the cylindrical filter screen 12 can be thoroughly cleaned.

[0035] Preferably, the machine body 1 should be equipped with a controller, which is electrically connected to the stepper motor 3 and the cylinder 16, so that the angle of rotation of the cylindrical filter screen 12 is rated each time and the timing of the extension of the mounting strip 17 is controlled, so that the cleaning rod 18 can be smoothly inserted into the filter holes at different positions to unclog the filter holes.

[0036] The distance between adjacent cleaning rods 18 is the same as the distance between adjacent filter holes on the cylindrical filter screen 12, which ensures that each filter hole can be effectively cleaned by the cleaning rod 18.

[0037] The heating strip 19 and the heat-conducting scraper 20 are located inside the cylindrical filter screen 12, while the fixing strip 14 and the mounting strip 17 are located outside the cylindrical filter screen 12. This layout design does not affect the normal operation of the cylindrical filter screen 12, and can effectively clean the inner wall and filter holes.

[0038] An operating door 4 is rotatably mounted on the machine body 1, and a handle 5 is fixedly mounted on the operating door 4. The bottom surface of the operating door 4 is lower than the lowest point of the cylindrical filter screen 12.

[0039] Preferably, a receiving plate is fixedly installed between the operating door 4 and the lowest end of the cylindrical filter screen 12 on the machine body 1. The receiving plate is used to ensure that the debris at the bottom of the cylindrical filter screen 12 can be smoothly removed.

[0040] When the operating door 4 is opened, the space at the bottom of the cylindrical filter screen 12 can be easily exposed. Since the debris is not attached to the inner wall of the cylindrical filter screen 12, the operator only needs to use the plate-shaped rake to easily and quickly move the impurities on the surface of the cylindrical filter screen 12 for collection, which is more efficient.

[0041] The machine body 1 is fitted with a feeding port 2, which is located directly above the input end of the screw extruder 15. The feeding port 2 is used to add kitchen waste into the device to ensure that the waste can smoothly enter the screw extruder 15 for processing.

[0042] The working process of this utility model is as follows: The crushed kitchen waste is added to the input end of the screw extruder 15 through the feeding port 2. The screw extruder 15 extrudes the incoming kitchen waste to achieve solid-liquid separation. The solid part is extruded into slag, and the liquid part is discharged through the liquid outlet and enters the cylindrical filter screen 12.

[0043] The filter holes on the cylindrical filter screen 12 enable filtration. When the initial contact surface is blocked, the cylindrical filter screen 12 is rotated by the drive mechanism, so that the clean surface (unblocked) is directly below the screw extruder 15, thereby ensuring that the equipment can be used stably for a long time, reducing the frequency of cleaning and improving efficiency.

[0044] During a thorough cleaning, the cylindrical filter screen 12 is rotated at a fixed angle by a drive mechanism.

[0045] At the same time, by heating the heating strip 19, the space around the heating strip 19 becomes hot, and the heating strip 19 smoothly transfers heat to the heat-conducting scraper 20, causing the heat-conducting scraper 20 to become hot, thereby melting and dripping the grease adhering to the inner wall of the cylindrical filter screen 12, more effectively removing the residue on the inner wall and preventing blockage.

[0046] Simultaneously, cylinder 16 is activated, driving mounting strip 17 to slide, causing cleaning rod 18 to pass through filter holes and remove blockages. By rotating the cylindrical filter screen 12 at the same angle, filter holes at different locations on the cylindrical filter screen 12 can be thoroughly cleaned.

[0047] When too much garbage accumulates at the bottom of the cylindrical filter screen 12, affecting the filtration effect, the operation door 4 can be opened. The operator only needs to use the plate-shaped rake to easily and quickly move the impurities on the surface of the cylindrical filter screen 12 for collection, which is more efficient.

[0048] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pretreatment device for kitchen waste biogas residue, comprising a body (1), wherein a screw extruder (15) is installed inside the body (1), and a drain pipe (6) is embedded in the bottom of the body (1), characterized in that, A cylindrical filter screen (12) is rotatably installed inside the machine body (1). Filter holes are evenly spaced on the cylindrical filter screen (12). The liquid outlet of the screw extruder (15) is located inside the cylindrical filter screen (12). A drive mechanism is installed inside the machine body (1). Two fixed blocks (13) are fixedly installed inside the machine body (1). An inner wall cleaning mechanism and a filter hole cleaning mechanism are provided between the two fixed blocks (13).

2. The pretreatment device for kitchen waste biogas residue according to claim 1, characterized in that, The drive mechanism includes a drive motor (3), a rotating shaft (7), and a mounting ring (10). The drive motor (3) is mounted on the machine body (1). The output end of the shaft of the drive motor (3) is fixedly connected to one of the rotating shafts (7). There are two rotating shafts (7). The two rotating shafts (7) are connected by a synchronous belt (8) through a pulley. A drive wheel (9) is fixedly mounted on the rotating shaft (7). There are two mounting rings (10), which are fixedly mounted at the beginning and end of the cylindrical filter screen (12). The mounting ring (10) has an adapter groove (11) that is compatible with the drive wheel (9).

3. A pretreatment device for kitchen waste biogas residue according to claim 1 or 2, characterized in that, The inner wall cleaning mechanism includes a heating strip (19), which is fixedly installed between two fixed blocks (13). A heat-conducting scraper (20) is fixedly installed on the heating strip (19), and the heat-conducting scraper (20) directly abuts against the inner wall of the cylindrical filter screen (12).

4. A pretreatment device for kitchen waste biogas residue according to claim 1 or 2, characterized in that, The filter cleaning mechanism includes a fixing strip (14) and an mounting strip (17). The fixing strip (14) is fixedly mounted on the fixing block (13), and the mounting strip (17) is slidably mounted on the fixing block (13). Cleaning rods (18) are evenly and equidistantly fixedly mounted on the side of the mounting strip (17) facing the cylindrical filter screen (12). A cylinder (16) is provided on the fixing strip (14), and the output end of the cylinder (16) is fixedly connected to the mounting strip (17).

5. The pretreatment device for kitchen waste biogas residue according to claim 3, characterized in that, The filter cleaning mechanism includes a fixing strip (14) and an mounting strip (17). The fixing strip (14) is fixedly mounted on the fixing block (13), and the mounting strip (17) is slidably mounted on the fixing block (13). Cleaning rods (18) are fixedly mounted evenly at equal intervals on one side of the mounting strip (17). A cylinder (16) is provided on the fixing strip (14), and the output end of the cylinder (16) is fixedly connected to the mounting strip (17).

6. The pretreatment device for kitchen waste biogas residue according to claim 4, characterized in that, The distance between adjacent cleaning rods (18) is the same as the distance between adjacent filter holes on the cylindrical filter screen (12).

7. The pretreatment device for kitchen waste biogas residue according to claim 5, characterized in that, The heating strip (19) and the heat-conducting scraper (20) are located inside the cylindrical filter screen (12), while the fixing strip (14) and the mounting strip (17) are located outside the cylindrical filter screen (12).

8. A pretreatment device for kitchen waste biogas residue according to claim 1, 2, 5, 6 or 7, characterized in that, An operating door (4) is rotatably mounted on the machine body (1), and a handle (5) is fixedly mounted on the operating door (4). The bottom surface of the operating door (4) is lower than the lowest point of the cylindrical filter screen (12).

9. A pretreatment device for kitchen waste biogas residue according to claim 1, 2, 5, 6 or 7, characterized in that, The machine body (1) is fitted with a feeding port (2), which is located directly above the input end of the screw extruder (15).

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