An impurity removal and pulping device for hydrothermal liquefaction of kitchen waste

Abstract

The present application provides an impurity removal and pulping device for hydrothermal liquefaction of kitchen waste, which relates to the field of solid waste treatment and includes an upper cylinder cover. One side of the top of the upper cylinder cover is provided with a feed pipe. A crushing structure is arranged inside the upper cylinder cover. Both ends of the crushing structure penetrate through the upper cylinder cover. The other end of the crushing structure is provided with a crushing and screening structure. An isolation frame is arranged outside the crushing and screening structure. A lower cylinder bin is arranged below the crushing structure. A flow conversion hopper is arranged below the lower cylinder bin. A first discharge structure is arranged on the front end of the upper cylinder cover and away from the feed pipe. A third discharge structure is arranged at the end of the upper cylinder cover. Through the arranged crushing structure and crushing and screening structure, the present application realizes the crushing of kitchen waste by means of shear crushing and grinding, and solves the problems that in the prior art, the impurity removal and pulping usually adopt the crushing method of a crushing hammer to crush kitchen waste, and this crushing method has low efficiency and poor crushing effect.

Description

Technical Field

[0001] The invention relates to the field of solid waste treatment, and in particular to an impurity removal and pulping device for hydrothermal liquefaction of kitchen waste. Background Art

[0002] In addition to conventional organic waste such as leftovers, kitchen waste also contains plastic products and metal products. The process of impurity removal and pulping is to separate inorganic matter such as plastic and metal in kitchen waste from the kitchen waste, and make the kitchen waste into pulp. The organic matter can be recycled as fertilizer, but the current impurity removal and pulping usually uses a crushing hammer to crush the kitchen waste, and the vegetables and meat in the kitchen waste have a lot of fiber, which makes this crushing method less efficient and the crushing effect is poor.

[0003] For example, the Chinese invention patent (application number: 202311236968.X) discloses a "double-shaft crushing, screening, impurity removal and pulping machine", and its specification discloses: including a support plate, a box body is provided on the support plate, a pair of electromagnetic braking three-phase asynchronous motors are provided on one side of the box body, and one side of the electromagnetic braking three-phase asynchronous motor is connected to the transmission main shaft, and the transmission main shaft extends into the box body. The present invention pours garbage from the set feed inlet, at which time a pair of electromagnetic braking three-phase asynchronous motors are set to drive a pair of rotating main shafts to rotate, and at the same time, water is discharged through the drain port on the rotating main shaft to mix it with the crushed kitchen waste. After that, the water falls from the material screen with the crushed organic matter, drives the fan blade roller to rotate, and drives the cleaning block to clean the crushing tank, so as to prevent the subsequent insufficient crushing of the material due to the accumulation of kitchen waste, and thus prevent the occurrence of unqualified quality problems; the above patents can prove the defects of the prior art.

[0004] Therefore, we have made improvements on this and proposed a pulping equipment for removing impurities from kitchen waste for hydrothermal liquefaction. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that the existing impurity removal pulping usually adopts a crushing hammer to crush the kitchen waste, and this crushing method has low efficiency and poor crushing effect.

[0006] In order to achieve the above-mentioned purpose of the invention, the present invention provides the following impurity removal and pulping equipment for hydrothermal liquefaction of kitchen waste to improve the above-mentioned problems.

[0007] The specific application is as follows:

[0008] A waste removal and pulping device for hydrothermal liquefaction of kitchen waste, including an upper cylinder cover. One side of the top of the upper cylinder cover is provided with a feed pipe, and the feed pipe is communicated with the upper cylinder cover for putting kitchen waste into the upper cylinder cover. A crushing structure is arranged inside the upper cylinder cover, and both ends of the crushing structure penetrate through the upper cylinder cover. The other end of the crushing structure is provided with a crushing and screening structure, which is used for secondary crushing and filtering of the kitchen waste crushed by the crushing structure. An isolation frame is arranged outside the crushing and screening structure, and the isolation frame is used for separating the internal area of the upper cylinder cover, dividing the internal area of the upper cylinder cover into a crushing area and a filtering area. The side of the isolation frame close to the feed pipe is the crushing area, and the side of the isolation frame far from the feed pipe is the filtering area, so as to separate the filtered and unfiltered waste. A lower cylinder bin is arranged below the crushing structure, and a flow conversion hopper is arranged below the lower cylinder bin. The flow conversion hopper is used to drive the water in the two areas inside the upper cylinder cover to flow and reverse inside the flow conversion hopper. The lower cylinder bin is used for the water circulation in the two areas inside the upper cylinder cover and the flow conversion hopper, and to filter out metal impurities. One side of the front end of the upper cylinder cover and far from the feed pipe is provided with a first discharge structure, which is used for discharging floating objects. The first discharge structure includes being fixedly connected to one side of the front end of the upper cylinder cover and far from the feed pipe. The L-shaped discharge pipe is communicated with the upper cylinder cover. The front end of the L-shaped discharge pipe is fixedly connected with a second driving motor. The output shaft of the second driving motor passes through the L-shaped discharge pipe and is fixedly connected with a discharge auger located inside the L-shaped discharge pipe. The end of the discharge auger extends into the upper cylinder cover. A third discharge structure is arranged at the end of the upper cylinder cover. A sealing plate is inserted through the top of the side of the third discharge structure close to the upper cylinder cover. A hydraulic cylinder fixedly installed on the upper cylinder cover is arranged on the top of the sealing plate. The telescopic end of the hydraulic cylinder is fixedly connected with the sealing plate. The hydraulic cylinder controls the movement of the sealing plate. When the sealing plate blocks the third discharge structure, it prevents the substances inside the upper cylinder cover from being discharged. When the sealing plate moves upward and does not block the third discharge structure, the substances inside the upper cylinder cover are discharged through the third discharge structure;

[0009] The crushing structure includes a central shaft, on which two symmetrically arranged end sealing plates are installed, and several forward rotation groups and reverse rotation groups located between the two end sealing plates. The forward rotation groups and reverse rotation groups are arranged alternately. A commutation gear assembly is arranged between the forward rotation groups and the reverse rotation groups, which is used to make the rotation directions of the forward rotation groups and the reverse rotation groups opposite. Several inclined crushing knives are arranged outside the forward rotation groups and the reverse rotation groups. The inclination directions of the crushing knives on the forward rotation groups and the reverse rotation groups are opposite. The rotation directions of the forward rotation groups and the reverse rotation groups are opposite, so as to realize the positive and reverse rotation of the crushing knives outside the forward rotation groups and the reverse rotation groups, and shear and crush the kitchen waste. Compared with the traditional rolling crushing, the crushing effect on the kitchen waste is better. Rolling crushing is more suitable for crushing substances with higher brittleness;

[0010] The crushing and screening structure includes a guiding part and a filtering part. The guiding part includes an inner grinding cylinder, and an outer grinding cylinder is arranged outside the inner grinding cylinder. An annular connecting plate is jointly arranged on one side of the outer grinding cylinder and the inner grinding cylinder. The inner grinding cylinder and the outer grinding cylinder are connected through the annular connecting plate. Guide grooves are formed on the inner side of the inner grinding cylinder and the outer side of the outer grinding cylinder. Drainage plates are fixedly arranged on the outer side of the inner grinding cylinder and the inner side of the outer grinding cylinder. The drainage plates are located on the side of the guide grooves. The filtering part includes an inner sieve cylinder arranged inside the inner grinding cylinder. The outer surface of the inner sieve cylinder is in contact with the inner wall of the inner grinding cylinder. An outer sieve cylinder is arranged outside the guide groove. An annular sieve plate is arranged on one side of the inner sieve cylinder. The inner sieve cylinder and the outer sieve cylinder are connected through the annular sieve plate. A plurality of filter holes are arranged on the inner sieve cylinder, the outer sieve cylinder and the annular sieve plate. The crushing structure drives the guiding part to rotate, and the drainage plates are inclined. Therefore, the drainage plates guide the crushed kitchen waste into the guide grooves. The inner wall on one side of the guide groove is also inclined. When the inner grinding cylinder and the outer grinding cylinder rotate, the inclined inner wall of the guide groove will guide the waste towards the direction of the annular connecting plate. Shearing forces will be formed between the filter holes on the inner grinding cylinder and the inner sieve cylinder and between the filter holes on the outer grinding cylinder and the outer sieve cylinder to crush the waste. At the same time, the structure composed of the guiding part and the filtering part utilizes the principle of grinding. The relative movement between the outer sieve cylinder and the guide groove and the relative movement between the inner grinding cylinder and the inner sieve cylinder can grind the waste inside the guide groove, further improving the crushing effect.

[0011] As a preferred technical solution of the present application, the forward rotation group includes a turntable, and a first mounting ring is fixedly connected to the outside of the turntable. The reverse rotation group is specifically a second mounting ring. The commutation gear assembly includes a gear rack fixedly connected to the central shaft. Central gears rotatably connected to the central shaft are arranged in the middle of both sides of the gear rack. A plurality of connecting shafts are inserted through the circumferential position on one side of the gear rack. Two planetary gears respectively located on both sides of the gear rack are fixedly arranged on the connecting shafts. The planetary gears are meshed with the central gears on the same side. A transmission internal gear meshed with the planetary gears is fixedly arranged on the inner wall of the second mounting ring. The central gears are fixedly connected to the adjacent turntables. A first driven gear is fixedly arranged at one end of the central shaft. A second driven gear is sleeved on the central shaft. A bevel gear is arranged between the second driven gear and the first driven gear. Both sides of the bevel gear are meshed with the first driven gear and the second driven gear respectively. A protective cover is installed at one end of the upper cylinder cover close to the feed pipe. A transmission sleeve is fixedly arranged on one side of the second driven gear close to the secondary transmission structure. The transmission sleeve passes through the adjacent end sealing plate and is fixedly connected to the first mounting ring.

[0012] As a preferred technical solution of the present application, the crushing knife includes a mounting seat fixedly connected to the outside of the first mounting ring and the second mounting ring. The mounting seats located on the first mounting ring and the second mounting ring have opposite inclination directions. A knife body is provided above the mounting seat. An installation groove is opened below the knife body. The mounting seat is located inside the installation groove. A mounting shaft is inserted through the middle of the mounting seat. Both ends of the mounting shaft are fixedly connected to the inner wall of the installation groove. A plurality of buffer grooves are opened on the mounting seat around the mounting shaft. A limiting block is slidably arranged inside the buffer groove. Both sides of the limiting block are fixedly connected to the inner wall of the installation groove. A spring is provided on one side of the limiting block.

[0013] As a preferred technical solution of the present application, both ends of the central shaft respectively pass through the inner wall of the upper cylinder cover and extend to both sides of the upper cylinder cover. An air delivery cavity is opened inside the central shaft. A plurality of air outlet holes are opened on the circumferential side of the central shaft.

[0014] As a preferred technical solution of the present application, the guiding groove is in the shape of a triangular pyramid. The side of the guiding groove close to the protective cover penetrates through the outer grinding cylinder and the inner grinding cylinder. One inner wall of the guiding groove is inclined. The inner grinding cylinder is fixedly connected to the adjacent end sealing plate. The outer sieve cylinder is rotatably connected inside the isolation frame.

[0015] As a preferred technical solution of the present application, the lower silo includes a middle frame fixedly connected below the upper cylinder cover. A guiding side plate is fixedly installed at the bottom end inside the middle frame. Bevels are provided on the peripheral sides of the top end of the guiding side plate. The isolation frame is fixedly connected inside the middle frame. The top of the isolation frame is fixedly connected to the inner wall of the upper cylinder cover. A filter plate is fixedly provided on one side of the isolation frame away from the protective cover. A baffle is provided below the guiding side plate and close to the protective cover. A plurality of collection holes are opened on the baffle. A flow conversion plate is provided below the baffle. A plurality of first flow conversion holes located below the filter plate are opened on the flow conversion plate. Second flow conversion holes located below the baffle are also opened above the flow conversion plate. A plurality of magnet groups are embedded on the flow conversion plate and are respectively located between the second flow conversion holes.

[0016] As a preferred technical solution of the present application, a relief groove is opened on one side of the flow conversion plate close to the protective cover. A first hydraulic cylinder is fixedly installed below the flow conversion plate. A transmission plate is fixedly installed at the telescopic end of the first hydraulic cylinder. The transmission plate passes through the relief groove and is fixedly connected to the baffle.

[0017] As a preferred technical solution of the present application, the flow conversion hopper includes a hopper body fixedly installed at the bottom end of the middle frame. A flow conversion auger is arranged inside the hopper body. A water inlet pipe is fixedly inserted through one side of the hopper body close to the protective cover. A second discharge structure is installed below the hopper body and close to the protective cover.

[0018] As a preferred technical solution of the present application, a first pulley is fixedly arranged on the outside of the transmission sleeve. One end of the commutation auger shaft close to the protective cover passes through the hopper body and is fixedly installed with a second pulley. The first pulley and the second pulley are connected by belt drive. When the first pulley rotates, it drives the second pulley to rotate, thereby realizing the first drive motor to drive the secondary transmission structure and the commutation auger. At the same time, when the first mounting ring rotates in the reverse direction, the commutation auger will also rotate in the reverse direction synchronously.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] In the solution of the present application:

[0021] 1. Through the arranged crushing structure and crushing and screening structure, the first mounting ring and the second mounting ring rotate in opposite directions, so that the crushing knives crush the kitchen waste by shearing and impacting. Shearing forces will be formed between the filter holes on the inner grinding cylinder and the inner screening cylinder and between the filter holes on the outer grinding cylinder and the outer screening cylinder to crush the waste. At the same time, the structure composed of the guiding part and the filtering part utilizes the principle of grinding. The relative movement between the outer screening cylinder and the guiding groove and the relative movement between the inner grinding cylinder and the inner screening cylinder can grind the waste inside the guiding groove, further improving the crushing effect. The kitchen waste is crushed by means of shear crushing and grinding, solving the problem that in the prior art, the crushing method of using a crushing hammer is usually adopted for impurity removal and pulping of kitchen waste, and this crushing method has low efficiency and poor crushing effect;

[0022] 2. Through the arranged lower silo, the heavier metals in the waste sink into the collection holes. At this time, the collection holes and the second commutation holes are misaligned, and the magnet group is located below the collection holes. The magnetic materials are also attracted by the magnet group, controlling the movement of the baffle, so that the collection holes overlap with the second commutation holes, and the baffle pushes the metal to move into the commutation hopper through the second commutation holes. The commutation hopper drives the water inside to pass through the second commutation holes and the collection holes and enter the crushing area. During the process of water entering the crushing area, it can prevent the waste except the heavier metals from entering the commutation hopper, realizing the separation of metals and solving the problem that the metals in the kitchen waste cannot be well separated in the prior art;

[0023] 3. Through the provided commutation hopper, during the initial crushing of the garbage by the secondary transmission structure, the first mounting ring rotates counterclockwise, and the second mounting ring rotates clockwise. The garbage in the crushing area is pushed by the crushing knives towards the direction of the protective cover. At this time, the water pump is started to inject water into the interior of the hopper body through the water inlet pipe. A second discharge structure is installed below the hopper body and on the side close to the protective cover. When the commutation auger rotates clockwise, the commutation auger drives the water inside the hopper body to move towards the direction close to the protective cover, causing the water inside the hopper body to pass through the collection holes and the second commutation holes into the crushing area. When the commutation auger rotates counterclockwise, the commutation auger drives the water inside the hopper body to move towards the direction close to the third discharge structure, causing the water inside the hopper body to pass through the first commutation holes and the filter plate into the filtration area, realizing the auxiliary control of the moving direction of the kitchen waste inside the upper cover and the driving direction of the water movement, and also assisting in the discharge of kitchen waste, metal, and plastic. Brief Description of the Drawings

[0024] Figure 1 Structural schematic diagram of the impurity removal and pulping equipment for hydrothermal liquefaction of kitchen waste provided by the present application;

[0025] Figure 2 Rear view split structural schematic diagram of the commutation hopper and the lower silo in the impurity removal and pulping equipment for hydrothermal liquefaction of kitchen waste provided by the present application;

[0026] Figure 3 Structural schematic diagram of the positional relationship among the commutation hopper, the lower silo, and the crushing structure in the impurity removal and pulping equipment for hydrothermal liquefaction of kitchen waste provided by the present application;

[0027] Figure 4 Structural schematic diagram of the interior of the upper cover in the impurity removal and pulping equipment for hydrothermal liquefaction of kitchen waste provided by the present application;

[0028] Figure 5 Structural schematic diagram of the guiding groove and the drainage plate in the impurity removal and pulping equipment for hydrothermal liquefaction of kitchen waste provided by the present application;

[0029] Figure 6 Cross-sectional structural schematic diagram of the crushing knife in the impurity removal and pulping equipment for hydrothermal liquefaction of kitchen waste provided by the present application;

[0030] Figure 7 Cross-sectional structural schematic diagram of the crushing knife in the impurity removal and pulping equipment for hydrothermal liquefaction of kitchen waste provided by the present application;

[0031] Figure 8 Structural schematic diagram of the commutation plate in the impurity removal and pulping equipment for hydrothermal liquefaction of kitchen waste provided by the present application;

[0032] Figure 9 Structural schematic diagram of the crushing structure in the impurity removal and pulping equipment for hydrothermal liquefaction of kitchen waste provided by the present application;

[0033] Figure 10 Schematic diagram of the secondary transmission structure in the impurity removal and pulping equipment for hydrothermal liquefaction of kitchen waste provided by this application;

[0034] Figure 11 Schematic diagram of the reversing gear assembly in the impurity removal and pulping equipment for hydrothermal liquefaction of kitchen waste provided by this application;

[0035] Figure 12 Schematic diagram of the ball component in the impurity removal and pulping equipment for hydrothermal liquefaction of kitchen waste provided by this application.

[0036] Labels in the figure:

[0037] 1. Upper cylinder cover;

[0038] 2. Feed pipe;

[0039] 3. Flow conversion hopper; 31. Hopper body; 32. Flow conversion auger; 33. Water inlet pipe; 34. Second belt pulley; 35. Second discharge structure;

[0040] 4. Lower silo; 41. Middle frame; 42. Filter plate; 43. Guide side plate; 44. Relief groove; 45. Baffle; 46. Collection hole; 47. Flow conversion plate; 48. First flow conversion hole; 49. Second flow conversion hole; 410. First hydraulic cylinder; 411. Transmission plate; 412. Magnet group;

[0041] 5. Protective cover;

[0042] 6. First discharge structure; 61. L-shaped discharge pipe; 62. Second driving motor; 63. Discharge auger;

[0043] 7. Crushing structure; 71. Central shaft; 72. Secondary transmission structure; 721. End sealing plate; 722. First mounting ring; 723. Turntable; 724. Second mounting ring; 725. Reversing gear assembly; 7251. Gear rack; 7252. Central gear; 7253. Planet gear; 7254. Transmission internal gear; 7255. Connecting shaft; 726. Ball component; 727. Ball groove; 73. Crushing knife; 731. Mounting seat; 732. Knife body; 733. Mounting groove; 734. Mounting shaft; 735. Buffer groove; 736. Limiting block; 737. Spring; 74. First belt pulley; 75. Bevel gear; 76. First driven gear; 77. Second driven gear; 78. First driving motor; 79. Transmission sleeve;

[0044] 8. Crushing and screening structure; 81. Inner grinding cylinder; 82. Outer grinding cylinder; 83. Guide groove; 84. Drainage plate; 85. Annular connecting plate; 86. Inner screening cylinder; 87. Outer screening cylinder; 88. Annular screening plate;

[0045] 9. Isolation frame;

[0046] 10. The third discharge structure. Specific implementation manners

[0047] In order to enable those skilled in the art of the present technology to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0048] In order to enable those skilled in the art of the present technology to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0049] It should be noted that, without conflict, the embodiments in the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0050] It should be noted that similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0051] Embodiment 1

[0052] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 9 , Figure 10 and Figure 11, A impurity removal and pulping device for hydrothermal liquefaction of kitchen waste, which includes an upper cylinder cover 1. On one side of the top of the upper cylinder cover 1, there is a feed pipe 2. The feed pipe 2 is connected to the upper cylinder cover 1 for putting kitchen waste into the upper cylinder cover 1. Inside the upper cylinder cover 1, there is a crushing structure 7. Both ends of the crushing structure 7 penetrate through the upper cylinder cover 1. At the other end of the crushing structure 7, there is a crushing and screening structure 8. The crushing and screening structure 8 is used for secondary crushing and filtering of the kitchen waste crushed by the crushing structure 7. Outside the crushing and screening structure 8, there is an isolation frame 9. The isolation frame 9 is used to separate the internal area of the upper cylinder cover 1, dividing the internal area of the upper cylinder cover 1 into a crushing area and a filtering area. The side of the isolation frame 9 close to the feed pipe 2 is the crushing area, and the side of the isolation frame 9 far from the feed pipe 2 is the filtering area, realizing the separation of filtered and unfiltered garbage. Below the crushing structure 7, there is a lower silo 4. Below the lower silo 4, there is a flow conversion hopper 3. The flow conversion hopper 3 is used to drive the water in two areas inside the upper cylinder cover 1 to flow and change direction inside the flow conversion hopper 3. The lower silo 4 is used for the water circulation between two areas inside the upper cylinder cover 1 and the flow conversion hopper 3, and realizes the filtration of metal impurities. On the front end of the upper cylinder cover 1 and on the side far from the feed pipe 2, there is a first discharge structure 6. The first discharge structure 6 is used for discharging floating objects. The first discharge structure 6 includes being fixedly connected to the front end of the upper cylinder cover 1 and on the side far from the feed pipe 2. The L-shaped discharge pipe 61 is connected to the upper cylinder cover 1. At the front end of the L-shaped discharge pipe 61, there is a second driving motor 62 fixedly connected. The output shaft of the second driving motor 62 passes through the L-shaped discharge pipe 61 and is fixedly connected to a discharge auger 63 located inside the L-shaped discharge pipe 61. The end of the discharge auger 63 extends into the upper cylinder cover 1. At the end of the upper cylinder cover 1, there is a third discharge structure 10. At the top of the side of the third discharge structure 10 close to the upper cylinder cover 1, there is a sealing plate inserted. On the top of the sealing plate, there is a hydraulic cylinder fixedly installed on the upper cylinder cover 1. The telescopic end of the hydraulic cylinder is fixedly connected to the sealing plate. The hydraulic cylinder controls the movement of the sealing plate. When the sealing plate blocks the third discharge structure 10, it prevents the substances inside the upper cylinder cover 1 from being discharged. When the sealing plate moves upward and does not block the third discharge structure 10, the substances inside the upper cylinder cover 1 are discharged through the third discharge structure 10;

[0053] The crushing structure 7 includes a central shaft 71. On the central shaft 71, there are two symmetrically arranged end sealing plates 721 and several forward rotation groups and reverse rotation groups located between the two end sealing plates 721. The forward rotation groups and reverse rotation groups are arranged alternately. Between the forward rotation groups and reverse rotation groups, there is a commutation gear assembly 725. The commutation gear assembly 725 is used to make the forward rotation groups and reverse rotation groups rotate in opposite directions. On the outside of both the forward rotation groups and reverse rotation groups, there are several inclined crushing knives 73. The inclined directions of the crushing knives 73 on the forward rotation groups and reverse rotation groups are opposite. The forward rotation groups and reverse rotation groups rotate in opposite directions. Thus, the crushing knives 73 outside the forward rotation groups and reverse rotation groups rotate forward and backward, shearing and crushing the kitchen waste. Compared with traditional rolling crushing, the crushing effect on kitchen waste is better. Rolling crushing is more suitable for crushing substances with higher brittleness;

[0054] The crushing and screening structure 8 includes a guiding part and a filtering part. The guiding part includes an inner grinding cylinder 81, and an outer grinding cylinder 82 is arranged outside the inner grinding cylinder 81. An annular connecting plate 85 is jointly arranged on one side of the outer grinding cylinder 82 and the inner grinding cylinder 81. The inner grinding cylinder 81 and the outer grinding cylinder 82 are connected through the annular connecting plate 85. A number of equally spaced guiding grooves 83 are formed on the inner side of the inner grinding cylinder 81 and the outer side of the outer grinding cylinder 82. A number of drainage plates 84 are fixedly arranged on the outer side of the inner grinding cylinder 81 and the inner side of the outer grinding cylinder 82. The drainage plates 84 are located on the side of the guiding grooves 83. The filtering part includes an inner sieve cylinder 86 arranged inside the inner grinding cylinder 81. The outer surface of the inner sieve cylinder 86 is in contact with the inner wall of the inner grinding cylinder 81. An outer sieve cylinder 87 is arranged outside the guiding grooves 83. An annular sieve plate 88 is arranged on one side of the inner sieve cylinder 86. The inner sieve cylinder 86 and the outer sieve cylinder 87 are connected through the annular sieve plate 88. A number of filter holes are formed on the inner sieve cylinder 86, the outer sieve cylinder 87 and the annular sieve plate 88. The crushing structure 7 drives the guiding part to rotate, and the drainage plates 84 are inclined. Therefore, the drainage plates 84 guide the crushed kitchen waste into the guiding grooves 83. The inner wall on one side of the guiding grooves 83 is also inclined. When the inner grinding cylinder 81 and the outer grinding cylinder 82 rotate, the inclined inner wall of the guiding grooves 83 will guide the waste towards the annular connecting plate 85. Shearing forces will be formed between the filter holes on the inner sieve cylinder 86 and the inner grinding cylinder 81 and between the filter holes on the outer sieve cylinder 87 and the outer grinding cylinder 82 to crush the waste. At the same time, the structure composed of the guiding part and the filtering part utilizes the principle of grinding. The relative movement between the outer sieve cylinder 87 and the guiding grooves 83 and the relative movement between the inner grinding cylinder 81 and the inner sieve cylinder 86 can grind the waste inside the guiding grooves 83, further improving the crushing effect.

[0055] Further, as Figure 9 , Figure 10 , Figure 11 and Figure 12As shown in the figure, the forward rotation group includes a turntable 723. An outer ring 722 is fixedly connected to the outside of the turntable 723. The reverse rotation group is specifically an inner ring 724. The reversing gear assembly 725 includes a gear frame 7251 fixedly connected to the central shaft 71. Central gears 7252 rotatably connected to the central shaft 71 are provided in the middle of both sides of the gear frame 7251. A plurality of connecting shafts 7255 are inserted through the circumferential positions on one side of the gear frame 7251. Two planetary gears 7253 located on both sides of the gear frame 7251 are fixedly provided on the connecting shafts 7255. The planetary gears 7253 are meshed with the central gears 7252 on the same side. A transmission internal gear 7254 meshed with the planetary gears 7253 is fixedly provided on the inner wall of the inner ring 724. The central gears 7252 are fixedly connected to the adjacent turntables 723. A first driven gear 76 is fixedly provided at one end of the central shaft 71. A second driven gear 77 is sleeved on the central shaft 71. A bevel gear 75 is provided between the second driven gear 77 and the first driven gear 76. Both sides of the bevel gear 75 are meshed with the first driven gear 76 and the second driven gear 77 respectively. A first driving motor 78 is provided above the bevel gear 75. The output shaft of the first driving motor 78 is connected to the bevel gear 75 through a speed reducer. A protective cover 5 is installed at one end of the upper cylinder cover 1 close to the feed pipe 2. The first driving motor 78, the bevel gear 75, the first driven gear 76 and the second driven gear 77 are all located inside the protective cover 5. A transmission sleeve 79 is fixedly provided on one side of the second driven gear 77 close to the secondary transmission structure 72. The transmission sleeve 79 passes through the adjacent end sealing plate 721 and is fixedly connected to the outer ring 722. The first driving motor 78 drives the bevel gear 75 to rotate, causing the first driven gear 76 and the second driven gear 77 to rotate in opposite directions. The second driven gear 77 drives the nearest turntable 723 to rotate through the transmission sleeve 79. The turntable 723 drives the adjacent central gear 7252 to rotate. Since the planetary gears 7253 on both sides of the gear frame 7251 are connected by the connecting shafts 7255, the central gear 7252 drives the planetary gears 7253 on both sides to rotate, thereby driving the central gear 7252 on the other side of the gear frame 7251 to rotate, so as to drive the adjacent turntable 723 to rotate. Similarly, all the planetary gears 7253 are driven to rotate, realizing the same-direction rotation of all the outer rings 722 of the forward rotation groups;

[0056] The first driven gear 76 drives the central shaft 71 to rotate. The central shaft 71 drives the gear frame 7251 to rotate. The rotation direction of the gear frame 7251 is opposite to that of the central gear 7252. The gear frame 7251 drives the planetary gears 7253 to rotate in a circular motion around the central gear 7252. The self-rotation of the planetary gears 7253 is transmitted through the transmission internal gear 7254 meshed with them, thereby driving the inner ring 724 to rotate in a direction opposite to that of the outer ring 722.

[0057] Embodiment 2

[0058] The impurity removal and pulping equipment for hydrothermal liquefaction of kitchen waste provided in Embodiment 1 is further optimized. Specifically, as Figure 7 , Figure 9 , Figure 10 , Figure 11 and Figure 12 shown, the crushing knife 73 includes a mounting seat 731 fixedly connected to the outside of the first mounting ring 722 and the second mounting ring 724. The mounting seats 731 located on the first mounting ring 722 and the second mounting ring 724 have opposite inclination directions. The opposite inclination directions enable that when the first mounting ring 722 and the second mounting ring 724 rotate in opposite directions, the cutter bodies 732 on the first mounting ring 722 and the second mounting ring 724 both push the garbage in the same direction. A cutter body 732 is provided above the mounting seat 731. An installation groove 733 is opened below the cutter body 732. The mounting seat 731 is located inside the installation groove 733. A mounting shaft 734 is inserted through the middle of the mounting seat 731. Both ends of the mounting shaft 734 are fixedly connected to the inner wall of the installation groove 733. A plurality of buffer grooves 735 are opened on the mounting seat 731 around the mounting shaft 734. A limiting block 736 is slidably arranged inside the buffer groove 735. Both sides of the limiting block 736 are fixedly connected to the inner wall of the installation groove 733. A spring 737 is provided on one side of the limiting block 736. The spring 737 installed on the first mounting ring 722 is in the clockwise direction of the limiting block 736 in the same buffer groove 735, and the spring 737 installed on the second mounting ring 724 is in the counterclockwise direction of the limiting block 736 in the same buffer groove 735. When the cutter body 732 breaks the garbage and encounters a hard object that is difficult to break, the cutter body 732 can rotate back around the mounting shaft 734. At this time, the limiting block 736 rotates to compress the spring 737, and the hard object bounces away from between the two cutter bodies 732 that realize shearing. The elastic force of the spring 737 makes the cutter body 732 reset, so as to avoid damage to the cutter body 732 when it encounters a hard object that is difficult to break.

[0059] Furthermore, as Figure 10 , Figure 11 and Figure 12 shown, the adjacent surfaces of the adjacent first mounting ring 722 and the second mounting ring 724 are both provided with ball grooves 727. A ball assembly 726 is provided between the adjacent two ball grooves 727. When the adjacent second mounting ring 724 and the first mounting ring 722 rotate, the ball assembly 726 reduces the friction between them. The two end sealing plates 721 are respectively fixedly connected to the adjacent first mounting ring 722 and the second mounting ring 724.

[0060] Furthermore, as Figure 3 , Figure 4 and Figure 9As shown in the figure, both ends of the central shaft 71 pass through the inner wall of the upper cylinder cover 1 and extend to both sides of the upper cylinder cover 1. An air delivery cavity is provided inside the central shaft 71, and a plurality of air outlet holes are provided on the circumferential side of the central shaft 71. One end of the central shaft 71 away from the protective cover 5 is connected with a rotary joint. During use, the rotary joint is connected to a high-temperature steam source. The high-temperature steam source enters the inside of the first mounting ring 722 and the second mounting ring 724 through the central shaft 71. Then, part of the steam is discharged from the gap between the first mounting ring 722 and the second mounting ring 724 to the area on the side of the crushing and screening structure 8 close to the secondary transmission structure 72. The air pressure of the first mounting ring 722 and the second mounting ring 724 becomes higher, ensuring that external liquid will not enter the internal area of the first mounting ring 722 and the second mounting ring 724. At the same time, the high-temperature steam enters the kitchen waste to melt the oil. Another part of the steam is directly discharged from the central shaft 71 to the area of the crushing and screening structure 8 away from the secondary transmission structure 72, reducing the density of the pulp formed after crushing the garbage, making it easier for lightweight plastics to float and facilitating separation.

[0061] Further, as Figure 4 、 Figure 5 and Figure 6 shown, the guiding groove 83 is in the shape of a triangular pyramid. One side of the guiding groove 83 close to the protective cover 5 penetrates through the outer grinding cylinder 82 and the inner grinding cylinder 81. The inner wall of one side of the guiding groove 83 in the counterclockwise direction is inclined to form an angle with the annular connecting plate 85. When the inner grinding cylinder 81 and the outer grinding cylinder 82 rotate, the inclined inner wall of the guiding groove 83 guides the garbage to move towards the annular connecting plate 85. The guiding groove 83 gradually becomes narrower and shallower from the side close to the protective cover 5 to the side close to the annular connecting plate 85. The inner grinding cylinder 81 is fixedly connected to the adjacent end sealing plate 721, and the outer screening cylinder 87 is rotatably connected inside the isolation frame 9.

[0062] Further, as Figure 1 、 Figure 2 、 Figure 3 and Figure 8As shown, the lower silo 4 includes a middle frame 41 fixedly connected to the bottom of the upper cylinder cover 1, a guide side plate 43 is fixedly installed at the bottom end of the middle frame 41, and the four sides of the top of the guide side plate 43 are provided with inclined surfaces, which prevent more garbage from remaining in the corners. The isolation frame 9 is fixedly connected to the inside of the middle frame 41, and the top of the isolation frame 9 is fixedly connected to the inner wall of the upper cylinder cover 1. A filter plate 42 is fixedly provided on the side of the isolation frame 9 away from the protective cover 5. The filter plate 42 is used to filter water in the crushed garbage. The filter plate 42 is fixedly connected to the guide side plate 43, and the bottom and close to the guide side plate 43 A baffle plate 45 is provided on one side of the protective cover 5, and a plurality of collecting holes 46 are provided on the baffle plate 45. A commutation plate 47 is provided below the baffle plate 45, and a plurality of No. 1 commutation holes 48 located below the filter plate 42 are provided on the commutation plate 47. A No. 2 commutation hole 49 located below the baffle plate 45 is also provided above the commutation plate 47. A plurality of magnet groups 412 are embedded on the commutation plate 47 and are respectively located between the No. 2 commutation holes 49. The magnet group 412 is composed of a plurality of magnets arranged in a Halbach array. The counterclockwise and clockwise directions are viewed from the left side of the main figure. The secondary transmission structure During the initial crushing of the garbage, the No. 1 mounting ring 722 rotates counterclockwise, and the No. 2 mounting ring 724 rotates clockwise. The garbage in the crushing area is pushed toward the direction of the protective cover 5 by the crushing knife 73, and the heavier metal in the garbage sinks into the collecting hole 46. At this time, the collecting hole 46 and the No. 2 commutation hole 49 are misaligned, and the magnet group 412 corresponds to the lower part of the collecting hole 46. The magnetic material is also attracted by the magnet group 412. During the second stage of crushing the garbage, the No. 1 mounting ring 722 rotates clockwise, and the No. 2 mounting ring 724 rotates counterclockwise. The garbage in the area is pushed by the crushing knife 73 in the direction away from the protective cover 5 through the crushing and screening structure 8 and enters the filtering area. The water in the filtering area passes through the filter plate 42 and enters the exchange bucket 3. The baffle 45 is controlled to move, and the collecting hole 46 overlaps with the No. 2 exchange hole 49. The baffle 45 pushes the metal to move from the No. 2 exchange hole 49 into the exchange bucket 3. The exchange bucket 3 drives the internal water to pass through the No. 2 exchange hole 49 and the collecting hole 46 into the crushing area. The process of water entering the crushing area can prevent garbage other than heavier metals from entering the exchange bucket 3, thereby realizing metal separation.

[0063] Further, such as Figure 2 and Figure 3 As shown, a groove 44 is provided on one side of the converter plate 47 close to the protective cover 5, and a No. 1 hydraulic cylinder 410 is fixedly installed below the converter plate 47. A transmission plate 411 is fixedly installed at the telescopic end of the No. 1 hydraulic cylinder 410. The transmission plate 411 passes through the groove 44 and is fixedly connected to the baffle 45. The telescopic movement of the No. 1 hydraulic cylinder 410 controls the movement of the baffle 45.

[0064] Further, such as Figure 1 , Figure 2 , Figure 3 and Figure 4As shown in the figure, the commutation hopper 3 includes a hopper body 31 fixedly installed at the bottom end of the middle frame 41. A commutation auger 32 is arranged inside the hopper body 31. A water inlet pipe 33 is fixedly inserted through one side of the hopper body 31 close to the protective cover 5. The water inlet pipe 33 is connected to a water pump. During the initial crushing of the garbage, in the secondary transmission structure 72, the first mounting ring 722 rotates counterclockwise, and the second mounting ring 724 rotates clockwise. The garbage in the crushing area is pushed by the crushing knife 73 towards the protective cover 5. At this time, the water pump is started to inject water into the hopper body 31 through the water inlet pipe 33. A second discharge structure 35 is installed below the hopper body 31 and close to one side of the protective cover 5. When the commutation auger 32 rotates clockwise, the commutation auger 32 drives the water inside the hopper body 31 to move towards the direction close to the protective cover 5, so that the water inside the hopper body 31 passes through the collection holes 46 and the second commutation holes 49 and enters the crushing area. When the commutation auger 32 rotates counterclockwise, the commutation auger 32 drives the water inside the hopper body 31 to move towards the direction close to the third discharge structure 10, so that the water inside the hopper body 31 passes through the first commutation holes 48 and the filter plate 42 and enters the filtering area. The second discharge structure 35 controls the opening and closing of the sealing cover through hydraulic pressure.

[0065] Further, as Figure 3 , Figure 4 , Figure 9 and Figure 10 shown, a first belt pulley 74 is fixedly arranged on the outside of the transmission sleeve 79. One end of the shaft of the commutation auger 32 close to the protective cover 5 passes through the hopper body 31 and is fixedly installed with a second belt pulley 34. The first belt pulley 74 and the second belt pulley 34 are connected by belt transmission. When the first belt pulley 74 rotates, it drives the second belt pulley 34 to rotate, thereby realizing that the first drive motor 78 drives the secondary transmission structure 72 and the commutation auger 32. At the same time, when the first mounting ring 722 rotates in the reverse direction, the commutation auger 32 will also rotate in the reverse direction synchronously.

[0066] Embodiment 3

[0067] A method for removing impurities and making pulp for hydrothermal liquefaction of kitchen waste, which includes:

[0068] S1. Feeding: Put the kitchen waste into the feeding pipe 2, and the kitchen waste enters the upper cylinder cover 1 for crushing;

[0069] S2. Inject steam: The rotary joint is connected to a high-temperature steam source. The high-temperature steam source enters the interiors of the first mounting ring 722 and the second mounting ring 724 through the central shaft 71. Then, part of the steam is discharged from the gap between the first mounting ring 722 and the second mounting ring 724 to the area of the crushing and screening structure 8 near the secondary transmission structure 72. The air pressure in the first mounting ring 722 and the second mounting ring 724 increases, ensuring that external liquid does not enter the internal areas of the first mounting ring 722 and the second mounting ring 724. At the same time, the high-temperature steam enters the kitchen waste to melt the oil. Another part of the steam is directly discharged from the central shaft 71 to the area of the crushing and screening structure 8 far from the secondary transmission structure 72, reducing the density of the pulp formed after crushing the waste, making it easier for lightweight plastics to float and facilitating separation;

[0070] S3. Primary crushing:

[0071] A3. Shear crushing: The first drive motor 78 drives the bevel gear 75 to rotate. The bevel gear 75 drives the second driven gear 77 and the first driven gear 76 to rotate. The second driven gear 77 drives the first mounting ring 722 to rotate counterclockwise through the transmission sleeve 79. The first driven gear 76 drives the second mounting ring 724 to rotate clockwise. The first mounting ring 722 and the second mounting ring 724 drive the crushing knives 73 to rotate. The first mounting ring 722 drives the crushing knives 73 on the first mounting ring 722 to rotate counterclockwise, and the second mounting ring 724 drives the crushing knives 73 on the second mounting ring 724 to rotate counterclockwise, performing shear crushing and impact crushing on the kitchen waste. At this time, the kitchen waste is pushed towards the protective cover 5 by the crushing knives 73;

[0072] B3. Water injection and mixing: The water pump injects water into the hopper body 31 through the water inlet pipe 33. The first pulley 74 drives the second pulley 34 to make the commutation auger 32 rotate counterclockwise. The commutation auger 32 rotates and pushes the water in the commutation auger 32 towards the direction of the first commutation hole 48. The water passes through the first commutation hole 48 and the filter plate 42 and enters the upper cylinder cover 1, and then passes through the crushing and screening structure 8 to be mixed with the kitchen waste. After injecting enough water, stop injecting water;

[0073] C3. Metal sedimentation: During the process of shear crushing, after the kitchen waste is mixed with water and crushed, the heavier metals doped in the kitchen waste settle into the second commutation hole 49. The principle that the crushing knives 73 drive the movement of the kitchen waste but are difficult to drive the heavier metals during rotation is similar to panning for gold. Therefore, the metals in the kitchen waste will concentrate in the second commutation hole 49;

[0074] S4. Secondary crushing and pulping:

[0075] A4. Reverse crushing: Control the first drive motor 78 to reverse, the first mounting ring 722 rotates clockwise, the second mounting ring 724 rotates counterclockwise, the crushing knife 73 pushes the kitchen waste towards the crushing and screening structure 8, and at the same time, the rotation of the crushing knife 73 shears and crushes the kitchen waste;

[0076] B4. Fine grinding: When the end sealing plate 721 rotates, it drives the guiding part to rotate. The drainage plate 84 guides the crushed kitchen waste into the guiding groove 83. When the inner grinding cylinder 81 and the outer grinding cylinder 82 rotate, the inclined inner wall of the guiding groove 83 will guide the waste towards the annular connecting plate 85. Shearing forces will be formed between the filter holes on the inner grinding cylinder 81 and the inner screening cylinder 86 and between the filter holes on the outer grinding cylinder 82 and the outer screening cylinder 87 to crush the waste. At the same time, the structure composed of the guiding part and the filtering part uses the principle of grinding. The relative movement between the outer screening cylinder 87 and the guiding groove 83 and the relative movement between the inner grinding cylinder 81 and the inner screening cylinder 86 can grind the waste inside the guiding groove 83;

[0077] C4. Filter screening: After the fineness of the kitchen waste after fine grinding reaches the standard, it passes through the filter holes on the filtering part and enters the side of the crushing and screening structure 8 away from the protective cover 5, and at the same time, the pulping process is completed;

[0078] S5. Metal separation and water circulation:

[0079] A5. Metal separation: During the secondary crushing, the reverse rotation of the first drive motor 78 causes the commutation auger 32 to reverse. The telescopic movement of the first hydraulic cylinder 410 controls the movement of the baffle 45, and the collection hole 46 overlaps with the second commutation hole 49. The baffle 45 pushes the metal to move through the second commutation hole 49 into the commutation hopper 3;

[0080] B5. Water circulation: The reverse rotating commutation auger 32 pumps the water above the filter plate 42 into the hopper body 31, and further drives the water inside to pass through the second commutation hole 49 and the collection hole 46 into the crushing area. During the process of the water entering the crushing area, it can prevent the waste except for the heavier metals from entering the commutation hopper 3, realizing the separation of metals. The water entering the crushing area drives the kitchen waste towards the filtering area, realizing water circulation, and can continuously move the kitchen waste in the crushing area towards the filtering area.

[0081] S6. Preliminary plastic separation: Softer plastics cannot be completely crushed by the crushing knife 73 and the crushing and screening structure 8. After the kitchen waste passes through the filter holes on the filtering part, the uncrushable plastics are intercepted on one side of the secondary transmission structure 72;

[0082] S7. Secondary separation of plastics: The completely crushed plastics pass through the crushing and screening structure 8 and enter the side of the outer sieve cylinder 87 away from the protective cover 5. The plastics with lower density float on the surface of the mixture of kitchen waste and water. The second driving motor 62 operates to drive the discharge auger 63 to rotate. The discharge auger 63 drives the plastics to discharge the plastics through the L-shaped discharge pipe 61.

[0083] S8. Discharging:

[0084] A8. Discharge of kitchen waste: The hydraulic cylinder controls the upward movement of the sealing plate, and the kitchen waste inside the upper cylinder cover 1 is discharged through the third discharge structure 10. At the same time, the secondary transmission structure 72 continues to rotate to push the water on the side of the crushing and screening structure 8 close to the secondary transmission structure 72 to the other side. Then, the water pump is turned on to inject water into the hopper body 31. The water in the hopper body 31 enters the crushing area to complete the flushing of the remaining kitchen waste. Finally, the third discharge structure 10 is closed.

[0085] B8. Discharge of metals: When the flow-changing auger 32 conveys water to the crushing area, when the flow-changing auger 32 rotates clockwise, it pushes the metals entering the inside of the hopper body 31 into the flow-changing auger 32. After discharging the kitchen waste, the second discharge structure 35 is opened to complete the discharge of metals.

[0086] C8. Discharge of plastics: After discharging the kitchen waste and metals, there is still a lot of water inside the upper cylinder cover 1. The water carries the plastics through the collection holes 46 and the second flow-changing holes 49 into the hopper body 31, and then discharges through the second discharge structure 35.

[0087] The discharged kitchen waste enters the next process for pressure filtration to remove water.

[0088] The usage process of the impurity removal and pulping equipment for hydrothermal liquefaction of kitchen waste provided by the present invention is as follows:

[0089] Working principle;

[0090] Put the kitchen waste into the feeding pipe 2. The kitchen waste enters the upper cylinder cover 1 for crushing. High-temperature steam is injected through the air delivery cavity of the central shaft 71. Part of the steam enters the gap between the first mounting ring 722 and the second mounting ring 724 to form a high-pressure area to prevent liquid backflow and melt the grease in the waste at the same time. Another part of the steam enters the side of the crushing and screening structure 8 far from the crushing area to reduce the density of the slurry and promote the floating of lightweight plastics. The first driving motor 78 drives the bevel gear 75 to rotate. The bevel gear 75 drives the second driven gear 77 and the first driven gear 76 to rotate. The second driven gear 77 drives the first mounting ring 722 to rotate counterclockwise through the transmission sleeve 79. The first driven gear 76 drives the second mounting ring 724 to rotate clockwise. The first mounting ring 722 and the second mounting ring 724 drive the crushing knives 73 to rotate. The first mounting ring 722 drives the crushing knives 73 on the first mounting ring 722 to rotate counterclockwise. The second mounting ring 724 drives the crushing knives 73 on the second mounting ring 724 to rotate counterclockwise to shear and impact-crush the kitchen waste. At this time, the kitchen waste is pushed by the crushing knives 73 towards the protective cover 5. While crushing, the water pump injects water into the hopper body 31 through the water inlet pipe 33. The first pulley 74 drives the second pulley 34 to make the commutation auger 32 rotate counterclockwise. The commutation auger 32 rotates and pushes the water in the commutation auger 32 towards the direction of the first commutation hole 48. The water passes through the first commutation hole 48 and the filter plate 42 and enters the upper cylinder cover 1, and then passes through the crushing and screening structure 8 to be mixed with the kitchen waste. Stop injecting water after injecting enough water. During the shearing and crushing process, after the kitchen waste is mixed with water and crushed, the heavier metals doped in the kitchen waste settle into the second commutation hole 49. When the crushing knives 73 rotate, they drive the kitchen waste to move but it is difficult to drive the heavier metals (the principle is similar to gold panning), so the metals in the kitchen waste will be concentrated in the second commutation hole 49;

[0091] Then, control the first driving motor 78 to reverse. The first mounting ring 722 rotates clockwise, and the second mounting ring 724 rotates counterclockwise. The crushing knife 73 pushes the kitchen waste towards the crushing and screening structure 8 and enters the space between the inner grinding cylinder 81 and the outer grinding cylinder 82. At the same time, the rotation of the crushing knife 73 continues to shear and crush the kitchen waste. When the end sealing plate 721 rotates, it drives the guiding part to rotate. The reverse rotation of the first driving motor 78 causes the commutation auger 32 to reverse. The telescopic movement of the first hydraulic cylinder 410 controls the movement of the baffle 45, and the collection hole 46 overlaps with the second commutation hole 49. The baffle 45 pushes the metal to move from the second commutation hole 49 into the commutation hopper 3. The drainage plate 84 guides the crushed kitchen waste into the guiding groove 83. When the inner grinding cylinder 81 and the outer grinding cylinder 82 rotate, the inclined inner wall of the guiding groove 83 will guide the waste towards the direction of the annular connecting plate 85. Shearing forces will be formed between the filter holes on the inner grinding cylinder 81 and the inner sieve cylinder 86 and between the filter holes on the outer grinding cylinder 82 and the outer sieve cylinder 87 to crush the waste. At the same time, the structure composed of the guiding part and the filtering part uses the principle of grinding. The relative movement between the outer sieve cylinder 87 and the guiding groove 83 and the relative movement between the inner grinding cylinder 81 and the inner sieve cylinder 86 can grind the waste inside the guiding groove 83. After the fineness of the finely ground kitchen waste reaches the standard, it passes through the filter holes on the filtering part and enters the side of the crushing and screening structure 8 away from the protective cover 5, and at the same time, the pulping process is completed. During the reverse rotation of the commutation auger 32, the water above the filter plate 42 is pumped into the hopper body 31, and further drives the internal water to pass through the second commutation hole 49 and the collection hole 46 into the crushing area. During the process of water entering the crushing area, it can prevent the waste except for heavier metals from entering the commutation hopper 3, realizing the separation of metals. The water entering the crushing area drives the kitchen waste towards the filtering area, realizing the water circulation, and can continuously move the kitchen waste in the crushing area towards the filtering area. The unbroken plastics are intercepted on one side of the crushing area, and the crushed light plastics float on the surface of the slurry in the filtering area and are discharged by the rotation of the discharge auger 63 in the first discharge structure 6;

[0092] After the pulping is completed, the hydraulic cylinder controls the sealing plate to move upward, and the food waste inside the upper cylinder cover 1 is discharged through the third discharge structure 10. At the same time, the secondary transmission structure 72 continues to rotate to push the water on the side of the crushing and screening structure 8 close to the secondary transmission structure 72 to the other side by the crushing knife 73. Then, the water pump is turned on to inject water into the hopper body 31. The water in the hopper body 31 enters the crushing area to complete the flushing of the remaining food waste. Finally, the third discharge structure 10 is closed. Then, when the flow-changing auger 32 conveys water to the crushing area, when the flow-changing auger 32 rotates clockwise, the metal entering the inside of the hopper body 31 is pushed into the flow-changing auger 32. After discharging the food waste, the second discharge structure 35 is opened to complete the discharge of the metal. After discharging the food waste and the metal and closing the water injection, there is still a lot of water inside the upper cylinder cover 1. The water carries the plastic through the collection hole 46 and the second flow-changing hole 49 into the hopper body 31, and then is discharged from the second discharge structure 35; the discharged food waste enters the next process for pressure filtration to remove water.

[0093] When the equipment is reused, the process of the flow-changing hopper 3 driving water from the filtration area to the crushing area inside the upper cylinder cover 1 can also realize the flushing of the filter plate 42 and the outer screen cylinder 87 to avoid blockage. At the same time, the garbage residues in each area inside the equipment are removed. When cleaning, water can also be injected into the upper cylinder cover 1, and then the cleaning action can be completed by switching the rotation directions of the secondary transmission structure 72 and the flow-changing auger 32.

[0094] In the present invention, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection or communication with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0095] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The preferred embodiments of the present invention are given in the drawings, but do not limit the patent scope of the present invention. The present invention can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosed content of the present invention more thorough and comprehensive. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing specific embodiments, or perform equivalent replacements on some of the technical features. Any equivalent structures directly or indirectly using the content of the specification and drawings of the present invention in other related technical fields are equally within the scope of the patent protection of the present invention.

Claims

1. A kitchen waste hydrothermal liquefaction impurity removal pulping equipment, characterized in that: The invention comprises an upper cylinder cover (1), a feeding pipe (2) is provided on one side of the top of the upper cylinder cover (1), a crushing structure (7) is provided inside the upper cylinder cover (1), both ends of the crushing structure (7) pass through the upper cylinder cover (1), a crushing and screening structure (8) is provided at the other end of the crushing structure (7), an isolation frame (9) is provided on the outside of the crushing and screening structure (8), a lower silo (4) is provided below the crushing structure (7), a flow exchange bucket (3) is provided below the lower silo (4), a No. 1 discharge structure (6) is provided on the front end of the upper cylinder cover (1) and away from the feeding pipe (2), and a No. 3 discharge structure (10) is provided at the end of the upper cylinder cover (1); The crushing structure (7) comprises a central shaft (71), on which are mounted two symmetrically arranged end sealing plates (721) and a plurality of forward rotation groups and reverse rotation groups alternately arranged between the two end sealing plates (721), a reversing gear assembly (725) being arranged between the forward rotation group and the reverse rotation group, and a plurality of inclined crushing knives (73) being arranged outside the forward rotation group and the reverse rotation group; The crushing and screening structure (8) comprises a guide portion and a filter portion, the guide portion comprises an inner grinding cylinder (81), an outer grinding cylinder (82) is arranged outside the inner grinding cylinder (81), an annular connecting plate (85) is provided on one side of the outer grinding cylinder (82) and the inner grinding cylinder (81), a guide groove (83) is provided on the inner side of the inner grinding cylinder (81) and the outer side of the outer grinding cylinder (82), a guide plate (84) is fixedly provided on the outer side of the inner grinding cylinder (81) and the inner side of the outer grinding cylinder (82), the filter portion comprises an inner sieve cylinder (86) arranged inside the inner grinding cylinder (81), an outer sieve cylinder (87) is arranged outside the guide groove (83), and an annular sieve plate (88) is provided on one side of the inner sieve cylinder (86).

2. The impurity removal pulping equipment for hydrothermal liquefaction of kitchen waste according to claim 1, characterized in that: The forward rotation group comprises a rotating disk (723), the outer portion of the rotating disk (723) is fixedly connected to a first mounting ring (722), the reverse rotation group is specifically a second mounting ring (724), the reversing gear assembly (725) comprises a gear frame (7251) fixedly connected to the central shaft (71), central gears (7252) rotatably connected to the central shaft (71) are provided at the middle portions of both sides of the gear frame (7251), a plurality of connecting shafts (7255) are interspersed at the circumferential positions of one side of the gear frame (7251), two planetary gears (7253) respectively located on both sides of the gear frame (7251) are fixedly provided on the connecting shafts (7255), the planetary gears (7253) meshing with the central gear (7252) on the same side, and the inner wall of the second mounting ring (724) is fixedly provided with a gear frame (7251) which is connected to the central gear (7252) on the same side. The central gear (7252) is fixedly connected to the adjacent rotating disk (723), a first driven gear (76) is fixedly provided at one end of the central shaft (71), a second driven gear (77) is sleeved on the central shaft (71), a bevel gear (75) is provided between the second driven gear (77) and the first driven gear (76), and the two sides of the bevel gear (75) are respectively meshed with the first driven gear (76) and the second driven gear (77), a protective cover (5) is installed at one end of the upper cylinder cover (1) close to the feed pipe (2), a transmission sleeve (79) is fixedly provided on one side of the second driven gear (77) close to the secondary transmission structure (72), and the transmission sleeve (79) passes through the adjacent end sealing plate (721) and is fixedly connected to the first mounting ring (722).

3. The impurity removal pulping equipment for hydrothermal liquefaction of kitchen waste according to claim 2, characterized in that: The crushing knife (73) comprises a mounting seat (731) fixedly connected to the outside of a first mounting ring (722) and a second mounting ring (724); the mounting seat (731) located on the first mounting ring (722) and the mounting seat (731) located on the second mounting ring (724) are inclined in opposite directions; a knife body (732) is provided above the mounting seat (731); a mounting groove (733) is provided below the knife body (732); the mounting seat (731) is located inside the mounting groove (733); A mounting shaft (734) is inserted through the middle of the mounting seat (731), and both ends of the mounting shaft (734) are fixedly connected to the inner wall of the mounting groove (733). The mounting seat (731) is provided with a plurality of buffer grooves (735) located around the mounting shaft (734), and a limit block (736) is slidably provided inside the buffer groove (735). Both sides of the limit block (736) are fixedly connected to the inner wall of the mounting groove (733), and a spring (737) is provided on one side of the limit block (736).

4. The impurity removal pulping equipment for hydrothermal liquefaction of kitchen waste according to claim 3, characterized in that: The two ends of the central shaft (71) respectively pass through the inner wall of the upper cylinder cover (1) and extend to the two sides of the upper cylinder cover (1). An air delivery cavity is provided inside the central shaft (71), and a plurality of air outlet holes are provided on the circumferential side of the central shaft (71).

5. The impurity removal pulping equipment for hydrothermal liquefaction of kitchen waste according to claim 4, characterized in that: The guide groove (83) is in the shape of a triangular pyramid. The guide groove (83) passes through the outer grinding cylinder (82) and the inner grinding cylinder (81) on a side close to the protective cover (5). An inner wall of one side of the guide groove (83) is arranged at an angle. The inner grinding cylinder (81) is fixedly connected to an adjacent end sealing plate (721). The outer sieve cylinder (87) is rotatably connected to the interior of the isolation frame (9).

6. The impurity removal pulping equipment for hydrothermal liquefaction of kitchen waste according to claim 5, characterized in that: The lower silo (4) comprises a middle frame (41) fixedly connected to the bottom of the upper silo cover (1), a guide side plate (43) is fixedly installed at the bottom end of the middle frame (41), and inclined surfaces are arranged on all sides of the top of the guide side plate (43). The isolation frame (9) is fixedly connected to the inside of the middle frame (41), and the top of the isolation frame (9) is fixedly connected to the inner wall of the upper silo cover (1). A filter plate (42) is fixedly provided on the side of the isolation frame (9) away from the protective cover (5), and a filter plate (42) is fixedly provided below the guide side plate (43) and close to the protective cover (5). A baffle (45) is provided on one side of the shield (5), a plurality of collecting holes (46) are provided on the baffle (45), a flow changer plate (47) is provided below the baffle (45), a plurality of No. 1 flow changer holes (48) located below the filter plate (42) are provided on the flow changer plate (47), a No. 2 flow changer hole (49) located below the baffle (45) is further provided above the flow changer plate (47), and a plurality of magnet groups (412) are embedded on the flow changer plate (47) and are respectively located between the No. 2 flow changer holes (49).

7. The impurity removal pulping equipment for hydrothermal liquefaction of kitchen waste according to claim 6, characterized in that: A groove (44) is provided on one side of the converter plate (47) close to the protective cover (5); a No. 1 hydraulic cylinder (410) is fixedly mounted below the converter plate (47); a transmission plate (411) is fixedly mounted on the telescopic end of the No. 1 hydraulic cylinder (410); the transmission plate (411) passes through the groove (44) and is fixedly connected to the baffle plate (45).

8. The impurity removal pulping equipment for hydrothermal liquefaction of kitchen waste according to claim 7, characterized in that: The flow conversion bucket (3) comprises a bucket body (31) fixedly mounted on the bottom end of the middle frame (41), a flow conversion auger (32) being arranged inside the bucket body (31), a water inlet pipe (33) being fixedly inserted through a side of the bucket body (31) close to the protective cover (5), and a second discharge structure (35) being installed below the bucket body (31) and on a side close to the protective cover (5).

9. The impurity removal pulping equipment for hydrothermal liquefaction of kitchen waste according to claim 8, characterized in that: A first pulley (74) is fixedly provided on the outside of the transmission sleeve (79); an end of the shaft of the commutation auger (32) close to the protective cover (5) passes through the bucket body (31) and is fixedly installed with a second pulley (34); the first pulley (74) and the second pulley (34) are connected via a belt transmission; when the first pulley (74) rotates, the second pulley (34) is driven to rotate, thereby enabling the first drive motor (78) to drive the secondary transmission structure (72) and the commutation auger (32); and when the first mounting ring (722) is reversed and rotated, the commutation auger (32) is also synchronously reversed and rotated.

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