Biomass briquette making apparatus

Abstract

The utility model discloses a kind of biomass briquetting equipment, comprising: containing frame, with containing cavity, for containing biomass briquetting;Cutting device, set below containing cavity, cutting device includes at least two first cutting knives and at least two second cutting knives, at least two first cutting knives and at least two second cutting knives form cutting channel;The cutting part of first cutting knife and second cutting knife is towards containing cavity, for cutting biomass briquetting into strip cutting;Mold, set below cutting device, with the cavity corresponding to the communication of cutting channel;Pressure supply device, for applying cutting pressure to biomass briquetting;Cutting device, set below mold, for cutting strip cutting and obtaining granule by cutting off.The process of pressing, cutting into strip cutting and cutting off biomass briquetting into small granule is simultaneously completed in the same equipment, simplify process, improve the forming efficiency of small briquetting, reduce the power consumption of pressure supply device.

Description

Technical Field

[0001] This utility model relates to the field of biomass processing technology, and in particular to a biomass pelleting equipment. Background Technology

[0002] Biomass energy, as the most promising renewable energy source, has become my country's fourth largest energy source after coal, oil, and natural gas. Biomass straw, as an important source of biomass energy, has low apparent and bulk density. When used in power generation, heating, and chemical industries, to reduce transportation, storage, and thermochemical conversion furnace costs, biomass straw needs to be processed into biomass pellets or blocks. The specific process flow is as follows: loose straw in the field → rake → baling → transportation and storage → heating the bundled straw → compressing the bundled straw into cakes → transporting to the user → crushing into smaller pieces by a crusher → boiler / gasifier. However, due to the excessive length of the bundled straw, the straw cannot adhere well to each other, resulting in a large pressing force required for compressing into cakes and high equipment power consumption. After the bundled straw is compressed into cakes, it still needs to be crushed into smaller pieces for subsequent use in boilers or gasifiers, making the process cumbersome. Utility Model Content

[0003] The purpose of this invention is to provide a biomass briquetting equipment that simplifies the molding process while reducing power consumption during molding.

[0004] In a first aspect, this utility model provides a biomass pelleting device, comprising: A receiving frame, having a receiving cavity, for holding biomass blocks; A cutting device is disposed below the receiving cavity. The cutting device includes at least two first cutters and at least two second cutters. The at least two first cutters extend along a first direction and are spaced apart along a second direction. The at least two second cutters extend along the second direction and are spaced apart along the first direction. The at least two first cutters and at least two second cutters form a cutting channel. The cutting portions of the first cutters and the second cutters face the receiving cavity and are used to cut biomass blocks into strips. The mold is located below the cutting device and has a cavity that communicates with the cutting channel. A pressure supply device is used to apply cutting pressure to biomass blocks; A cutting device, located in the receiving frame and below the mold, is used to cut strip-shaped material into pellets.

[0005] When using the above technical solution, during operation, the biomass block is placed in the receiving cavity of the receiving frame. Below the biomass block are the cutting device and the mold. The pressure supply device applies cutting pressure to the biomass block. Under the action of the cutting pressure, the biomass block gradually passes through the cutting device. During this process, the biomass block is cut into strips by the cutting parts of at least two first cutters and at least two second cutters of the cutting device. The strips move in the cutting channel formed by the at least two first cutters and at least two second cutters, and gradually move downward into the cavity of the mold. During the movement of the strips in the cavity, the cavity has a squeezing and maintaining pressure on the cutting channel, so that after the strips come out of the cavity, they can maintain a better bonded shape and are not easy to loosen. Then, the extruded strips are cut into pellets by the cutting device, thus completing the pelleting of the biomass block. This biomass pelletizing equipment integrates the processes of pressing, cutting into strips, and chopping into small pellets from biomass lumps into a single, simultaneous process. Compared to the existing process of first pressing biomass lumps into large cakes, then transporting them to the user end, and finally using a separate crusher to break the large cakes into smaller pieces, this simplifies the process and improves the pelletizing efficiency. Furthermore, since the pressing and cutting of the biomass lumps are completed under the same cutting pressure, the pressure required for cutting is less than that required for pressing into cakes, thus reducing the power consumption of the pressure supply device.

[0006] In some possible implementations, the receiving frame includes a separate upper frame and a lower frame, with the cutting device and the mold detachably connected between the upper frame and the lower frame.

[0007] In some possible implementations, the first opening of the cavity near the cutting channel is larger than the second opening away from the cutting channel; Preferably, the ratio of the cross-sectional area of ​​the first opening to the cross-sectional area of ​​the second opening is greater than or equal to 3:1; And / or, the angle between the inner wall of the cavity and the axis of the cavity is 10°~45°.

[0008] In some possible implementations, the cutting device includes: Rotary cutter and first drive component; The rotary cutter is located below the mold and is connected to the drive end of the first drive component. The first drive component is used to drive the rotary cutter to rotate in a plane perpendicular to the axial direction of the cavity. The rotary cutter is used to cut the strip material into granules.

[0009] In some possible implementations, the first cutter includes: A first blade and a second blade extending along a first direction, the first blade and the second blade being disposed opposite each other along a second direction, and a separation gap existing between the first blade and the second blade; A rotating cutter is located in the separation gap. The rotating cutter includes a rotating shaft and a cutting blade disposed on the outer surface of the rotating shaft. The axis of the rotating shaft is parallel to the first direction. The second drive component is connected to the rotating shaft and is used to drive the rotating shaft to rotate.

[0010] In some possible implementations, the cutting portion of the first blade is higher than the cutting portion of the second blade along the axial direction of the cutting channel.

[0011] In some possible implementations, the cutting blade is arranged to extend helically along the axis of rotation.

[0012] In some possible implementations, the cutting portion of the first cutter is higher than the cutting portion of the second cutter along the axial direction of the cutting channel.

[0013] In some possible implementations, the pressure supply device includes a press with a movable pressure head located above the receiving frame. The press is capable of driving the movable pressure head to move within the receiving cavity in a direction toward or away from the cutting device to apply cutting pressure to the biomass blocks.

[0014] In some possible implementations, the cutting device, mold, and slitting device are all fixedly installed within the receiving frame; The pressure supply device includes a press, which includes: A fixed pressure head is fixedly installed above the receiving cavity; The lifting pressure head is located at the bottom of the receiving frame. The press can drive the lifting pressure head to rise or fall, so as to drive the receiving frame to move in the direction of approaching or away from the fixed pressure head, and to apply cutting pressure to the biomass blocks. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 A schematic diagram of a biomass pelletizing device provided in an embodiment of this utility model; Figure 2 for Figure 1 A schematic diagram of direction A in the middle; Figure 3 for Figure 1 A schematic diagram of the cutting device in a biomass pelletizing equipment. Figure 4 for Figure 3 A top view of the cutting device in the middle; Figure 5 for Figure 3 A magnified structural diagram of part B in the middle; Figure 6 A schematic diagram of the structure of a mold for a biomass pelletizing device provided in this embodiment of the present invention; Figure 7 A schematic diagram of another biomass pelletizing device provided in this embodiment of the present invention; Figure 8 for Figure 7 A schematic diagram of the biomass pelletizing equipment from another direction; Figure 9 for Figure 7 A schematic diagram of the E-direction; Figure 10 for Figure 7 A schematic diagram of the cutting device in a biomass pelletizing equipment. Figure 11 for Figure 10 A schematic diagram of the cutting device from another direction; Figure 12 for Figure 10 A top view of the cutting device in the middle; Figure 13 for Figure 10 A magnified schematic diagram of part C in the diagram.

[0016] Reference numerals: 100 is a pressure supply device, 110 is a press, 120 is a movable pressure head, 130 is a fixed pressure head, 140 is a lifting pressure head, 200 is a biomass block, 300 is a cutting device, 301 is a cutting channel, 302 is a dividing gap, 303 is a wear-resistant coating, 304 is a cutter body, 310 is a first cutter, 311 is a first blade, 312 is a second blade, 313 is a rotating cutter, 3131 is a rotating shaft, 3132 is a cutting blade, 320 is a second cutter, 330 is a mounting frame, 400 is a mold, 401 is a cavity, 410 is a first opening, 420 is a second opening, 500 is a cutting device, 510 is a rotating cutter, 520 is a fixed frame, 530 is a first driving component, 600 is a receiving frame, 610 is an upper frame, and 620 is a lower frame. Detailed Implementation

[0017] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0018] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. "Several" means one or more, unless otherwise explicitly specified.

[0020] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] like Figures 1-12As shown, this utility model embodiment provides a biomass pelletizing device, including a receiving frame 600, a cutting device 300, a mold 400, a pressure supply device 100, and a cutting device 500; wherein, the receiving frame 600 has a receiving cavity 611 for receiving biomass pellets 200, which can be obtained by bundling straw, rice straw, wheat straw, etc.; the cutting device 300 is disposed below the receiving cavity 611, and the cutting device 300 includes at least two first cutters 310 and at least two second cutters 320. The number of first cutters 310 and second cutters 320 can be two, three, four, five, or more. At least two first cutters 310 extend along a first direction and are spaced apart along a second direction, and at least two second cutters 320 extend along the second direction and are spaced apart along the first direction. The first direction and the second direction are different, specifically they can be perpendicular to each other or aligned with each other. From another angle, at least two first cutters 310 and at least two second cutters 320 form multiple cutting channels 301, that is, every two adjacent first cutters 310 and every two adjacent second cutters 320 form a cutting channel 301, forming multiple cutting channels 301 arranged in an array; the cutting parts of the first cutters 310 and the second cutters 320 face the receiving cavity 611, and are used to cut the biomass block 200 into multiple strips; while the biomass block 200 is being cut, the resulting strips pass through the cutting channels 301; the mold 400 is disposed in the receiving frame 600 and located below the cutting device 300, and the mold 400 has multiple cavities 401 that communicate with the cutting channels 301; the pressure supply device 100 is used to apply cutting pressure to the biomass block 200; the cutting device 500 is disposed below the mold 400, and is used to cut the strips into multiple pellets.

[0023] When the biomass pelletizing equipment is working, the biomass pellets 200 are placed in the receiving cavity 611 of the receiving frame 600. The biomass pellets 200 can be round, rectangular, or square bundles, etc. The shape of the receiving frame 600 is adjusted according to the shape of the biomass pellets 200 so that the receiving cavity 611 matches the shape of the biomass pellets 200. This facilitates the limiting of the biomass pellets 200 around their periphery, prevents diffusion to the outside during the pressing process, and improves the pressing and molding quality. Below the biomass block 200 are, in sequence, a cutting device 300 and a mold 400. A pressure supply device 100 applies cutting pressure to the biomass block 200, gradually compressing it. When the force required for cutting the biomass block 200 is reached, the biomass block 200 is cut into multiple strips by the cutting portions of the first cutter 310 and the second cutter 320 of the cutting device. These multiple strips move within multiple cutting channels 301 formed by at least two first cutters 310 and at least two second cutters 320. The cross-sectional shape of the strips corresponds to the cutting... The cross-sectional shape of the material channel 301 is the same. As the pressure supply device 100 continuously applies pressure, the strip-shaped material gradually moves downward into the cavity 401 of the mold 400. During the movement of the strip-shaped material in the cavity 401, the cavity 401 has the function of squeezing and maintaining pressure on the strip-shaped material. The axial length of the cavity 401 is sufficient to ensure that the strip-shaped material has a pressure holding time of greater than or equal to 10 seconds when passing through. The axial length of the cavity 401 is obtained according to the moving speed of the strip-shaped material and the required pressure holding time, so that the strip-shaped material can maintain a better bonded shape after being extruded from the cavity 401 and is not easy to loosen. Then, the extruded strip-shaped material is cut into multiple pellets by the cutting device 500, that is, the strip-shaped material is shortened into multiple small pellets. The cutting length of the pellets can be less than or equal to 10 cm, thus completing the pellet forming of biomass lumps.

[0024] As can be seen from the above working process, this biomass briquette pelletizing equipment integrates the pressing, cutting into strips, and further cutting into small pellets of biomass briquette into a single, simultaneous process. That is, the pressing and cutting of biomass briquette occur simultaneously. Compared to the existing process of first pressing biomass briquette into large cakes, then transporting them to the user end, and finally crushing the large cakes separately using a crusher, this application simplifies the process, eliminates the need for a separate crusher, and improves the pelletizing efficiency. Furthermore, since the pressing and cutting of biomass briquette are completed under the same cutting pressure, it is not necessary to directly press the biomass briquette into large bundles before cutting. The pressure required for cutting is less than that required for pressing into large bundles in existing systems, thus reducing the power consumption of the pressure supply device.

[0025] like Figure 1 , Figure 3 , Figure 4 , Figures 7-12 As shown, in some embodiments, the receiving frame 600 includes a separate upper frame 610 and a lower frame 620. Both the upper frame 610 and the lower frame 620 can be cylindrical structures that extend through both ends. The cross-sectional shape of the upper frame 610 and the lower frame 620 is selected according to the shape of the biomass block 200, without specific limitation. The cutting device 300 and the mold 400 are detachably connected between the upper frame 610 and the lower frame 620. The upper frame 610 and the cutting device 300 form a receiving cavity 611. The cutting device 500 can be disposed on the lower frame 620. Specifically, flange structures are provided at the close ends of the upper frame 610 and the lower frame 620. The cutting device 300 and the mold 400 also have similar flange structures at their edges. The flange structures of the cutting device 300 and the mold 400 are stacked between the flange structures of the upper frame 610 and the lower frame 620 and fastened with bolts or other fasteners. The receiving frame 600 is detachably connected to the cutting device 300 and the mold 400. The easily worn cutting device 300 and mold 400 can be disassembled and replaced individually, reducing equipment maintenance costs. Of course, the receiving frame 600 can also have other structural forms, as long as it has a receiving cavity 601 capable of holding biomass blocks. For example, the receiving frame 600 may not include the lower frame 620; the pelletizing device 300 and mold 400 can be detachably connected to the lower part of the upper frame 610, with the mold 400 and cutting device 300 positioned below the upper frame and supported by other supporting structures.

[0026] like Figures 1-5 As shown, this embodiment provides a specific cutting device 300, which includes at least two first cutters 310, at least two second cutters 320, and a mounting frame 330. The cutting portions of both the first cutters 310 and the second cutters 320 are cutting blades. The cutting blade of the first cutter 310 extends continuously along a first direction, and both ends of the first cutter 310 are fixed to the mounting frame 330. The cutting blade of the second cutter 320 extends along a second direction, and both ends of the second cutter 320 are fixed to the mounting frame 330. The first cutters 310 and the second cutters 320 intersect in a grid-like pattern to form a single integrated structure. Each pair of adjacent first cutters 310 and every two adjacent second cutters 320 form a cutting channel 301. It should be noted that the cutting channel 301 located at the edge of the cutting device 300 is formed by two adjacent second cutters 320, a first cutter 310 arranged opposite to each other, and the inner wall of the mounting frame 330, or by two adjacent first cutters 310, a second cutter 320 arranged opposite to each other, and the inner wall of the mounting frame 330; the cutting channel 301 located at the corner of the cutting device 300 is formed by a first cutter 310, a second cutter 320, and a corner of the mounting frame 330.

[0027] When the cutting device 300 is in use, the biomass block 200 is pressed against one side of the cutting device 300 by the pressure provided by the pressure supply device 100. The cutting edges of the first cutter 310 and the second cutter 320 come into contact with the biomass block 200. As the contact pressure increases, when the pressure required for cutting is reached, the biomass block 200 is gradually cut apart along the pressing direction by multiple first cutters 310 and second cutters 320, forming multiple strip-shaped pieces. Each strip-shaped piece enters the corresponding cutting channel 301. As the pressing continues, the strip-shaped pieces gradually move into the cavity 401 of the mold 400 located below, until the entire biomass block 200 is completely cut. The cutting device 300 uses the pressure provided by the pressure supply device 100 and the cutting edges of the first cutter 310 and the second cutter 320 to complete the cutting and separating of materials.

[0028] In addition to the above-described structural forms, the first cutter 310 and the second cutter 320 can also have other structures. For example, the first cutter 310 may also extend continuously along the first direction, while the second cutter 320 may include multiple segmented cutters that extend along the second direction and are spaced apart. The cutting portions of both the first cutter 310 and the second cutter 320 are cutting blades. The cutting blade of the first cutter 310 extends continuously along the first direction and is a relatively long cutter. Both ends of the first cutter 310 are fixed to the mounting frame 330. The cutting blade of the second cutter 320 extends along the second direction, and the segmented cutters are relatively short cutters. In the second direction, two adjacent segmented cutters are separated by the first cutter 310 and fixed to each other. The two outermost segmented cutters are fixed to the mounting frame 330. Every two adjacent first cutters 310 and every two adjacent segmented cutters form a cutting channel 301. Of course, the first cutter 310 can also include multiple segmented cutters extending along a first direction and spaced apart, which are shorter cutters, and the second cutter 320 can extend continuously along a second direction, which are longer cutters. The segmented cutters of two adjacent first cutters 310 are separated by the second cutter 320 and fixed to each other. As long as the first cutter 310 and the second cutter 320 are fixed together to form a grid structure and have cutting edges, it is not limited to the structural forms listed in this embodiment.

[0029] like Figure 5As shown, in some embodiments, at least the cutting surfaces of the first cutter 310 and the second cutter 320 are provided with a wear-resistant coating 303, that is, at least the cutting edges of the first cutter 310 and the second cutter 320 are provided with a wear-resistant coating 303. Both the first cutter 310 and the second cutter 320 include a cutter body 304 and a wear-resistant coating 303. The cutter body 304 can be made of a hard material such as 42CrMo, and the wear-resistant coating 303 can be made of a material with good wear resistance such as tungsten carbide coating, to improve the toughness and wear resistance of the first cutter 310 and the second cutter 320, making them less prone to damage and extending their service life.

[0030] like Figure 5 As shown, in some embodiments, the cutting edge angle θ is 30°~50°. That is, the included angle between the two surfaces constituting the cutting edge is 30°~50°, specifically 30°, 35°, 40°, 45°, 50°, etc. If the cutting edge angle θ is less than 30°, the cutting edge is too thin, its toughness may be insufficient, it is easily damaged, and it is not conducive to the separation of the strip-shaped material obtained from the cut. If the cutting edge angle θ is greater than 50°, the cutting edge angle is too large, the cutting pressure required is too large, which is not conducive to the cutting of biomass blocks and increases the power consumption of the pressure supply device. Therefore, considering the above factors, the cutting edge angle θ is selected to be 30°~50°.

[0031] like Figure 1 and Figure 6 As shown, in some embodiments, the first opening 410 of the cavity 401 near the cutting channel 301 is larger than the second opening 420 away from the cutting channel 301, that is, the inlet of the cavity 401 is larger than the outlet. Since the first opening 410 of the cavity 401 near the cutting channel 301 is larger than the second opening 420 away from the cutting channel 301, as the strip material passes from the first opening 410 to the second opening 420, as the cross-section of the cavity 401 continuously decreases, the cavity 401 has a better squeezing and holding pressure effect on the strip material, which enables the strip material coming out of the second opening 420 to maintain a better bonded shape and not easily loosen.

[0032] In some embodiments, the ratio of the cross-sectional area of ​​the first opening 410 to the cross-sectional area of ​​the second opening 420 of the cavity 401 is greater than or equal to 3:1, specifically 3:1, 4:1, 5:1, 6:1, etc. The cross-section refers to the section perpendicular to the axis of the cavity 401. The cross-sections of the first opening 410 and the second opening 420 can be rectangular, circular, etc., and can be the same as the cross-sectional shape of the cutting channel 301. If the ratio of the cross-sectional area of ​​the first opening 410 to the cross-sectional area of ​​the second opening 420 is less than 3:1, the ratio is too small, and the extrusion and pressure holding effect of the cavity 401 on the strip-shaped material cannot meet the shaping effect, easily causing the strip-shaped material to become loose after extrusion.

[0033] In some embodiments, the included angle β between the inner wall of the cavity 401 and the axis of the cavity 401 is 10° to 45°. Specifically, the included angle β is 10°, 15°, 20°, 25°, 30°, 35°, 40°, 45°, etc. If the included angle β is less than 10°, it means that the sizes of the first opening 410 and the second opening 420 are not significantly different, which is not conducive to the extrusion and pressure-holding shaping of the strip material. If the included angle β is greater than 45°, the axial length of the cavity 401 may be too small, resulting in a short pressure-holding time for the strip material when passing through the cavity 401, which also fails to guarantee the pressure-holding shaping effect. Therefore, considering the extrusion and pressure-holding shaping effect of the strip material, an included angle β of 10° to 45° is selected.

[0034] like Figure 1 , Figure 7 and Figure 8 As shown, in some embodiments, the cutting device 500 includes a first driving component 530 and a rotary cutter 510; wherein, the first driving component 530 can be a motor or a motor with a reducer, or other component capable of driving rotation. The rotary cutter 510 is located below the mold 400, and the rotary cutter 510 is connected to the driving end of the first driving component 530. Specifically, the rotary cutter 510 is connected to the output shaft of the motor. The first driving component 530 is used to drive the rotary cutter 510 to rotate in a plane perpendicular to the axial direction of the cavity 401. The rotary cutter 510 is used to cut the strip material into multiple blocks. There is a certain distance between the rotary cutter 510 and the second opening 420 of the cavity 401 to avoid the rotary cutter 510 touching the bottom surface of the mold 400 and causing damage. The rotary cutter 510 may include one or more cutters rotating in a horizontal plane. By controlling the rotation speed and start / stop of the rotary cutter 510, blocks of the required length can be obtained.

[0035] Of course, the cutting device 500 can also be a shearing mechanism, which cuts the strip material into multiple blocks using a scissor-like shearing mechanism. It is not limited to the forms listed in this application, as long as it can cut the strip material into small blocks.

[0036] In some embodiments, the cutting device further includes a fixing frame 520, which can be fixed to the receiving frame 600. Specifically, when the receiving frame 600 includes a lower frame 620, the fixing frame 520 can be fixed to the lower frame 620, and the first driving component 530 is disposed on the fixing frame 520. Of course, the fixing frame 520 may not be fixed to the receiving frame 600, as long as the cutting device is supported below the mold 400 by the fixing frame 520.

[0037] like Figures 7-13As shown, this embodiment provides another cutting device 300, which also includes a plurality of first cutters 310, a plurality of second cutters 320, and a mounting frame 330. Unlike the previous cutting device 300, the first cutter 310 in this embodiment includes a first blade 311, a second blade 312, a rotating cutter 313, and a second driving component (not shown in the figure). The first blade 311 and the second blade 312 are vertically arranged, and the side of the first blade 311 and the second blade 312 near the receiving cavity 611 extends along a first direction. The first blade 311 and the second blade 312 are arranged opposite each other along a second direction. The ends of the first blade 311 and the second blade 312 are fixed to the mounting frame 330. The first direction and the second direction are two different directions in a plane perpendicular to the axis of the receiving cavity 611, and they can be perpendicular to each other or at other angles. The side of the first blade 311 and the second blade 312 facing the receiving cavity 611 can be a cutting section or a sharp edge. The cutting section is a cutting blade, that is, the first blade 311 and the second blade 312 can have cutting ability or not have cutting ability, and can only be separated by the sharp edge. There is a separation gap 302 between the first blade 311 and the second blade 312; the rotating cutter 313 is located in the separation gap 302 and is close to the upper opening of the separation gap 302. The rotating cutter 313 includes a rotating shaft 3131 and a cutting blade 3132 disposed on the outer surface of the rotating shaft 3131. The axis of the rotating shaft 3131 is parallel to the first direction. Specifically, the rotating shaft 3131 can be rotatably connected to the receiving frame 600, such as the two ends of the rotating shaft 3131 being rotatably connected to the upper frame 610. The second driving component is connected to the rotating shaft 3131 and is used to drive the rotating shaft 3131 to rotate. The second driving component can be a motor or other component that can drive the rotating shaft 3131 to rotate. Each first cutter 310 includes a rotating cutter 313. Multiple first cutters 310 can be driven to rotate by a second driving component in a synchronous manner, or each rotating cutter 313 can be connected to a corresponding second driving component.

[0038] The second cutter 320 includes a plurality of segmented cutters extending along a second direction and spaced apart. In the second direction, two adjacent segmented cutters are separated by a first cutter plate 311 and a second cutter plate 312. The first cutter plate 311, the second cutter plate 312 and the segmented cutters form a cutting channel 301. Specifically, in two adjacent first cutters 310, the first cutter plate 311 of one first cutter 310 and the second cutter plate 312 of the other first cutter 310, as well as the two adjacent segmented cutters, form a cutting channel 301. It should be noted that the cutting channel 301 located at the edge of the cutting device 300 is formed by a first blade 311, two adjacent segmented cutters, and one inner wall of the mounting frame 330, or by a second blade 312, two adjacent segmented cutters, and one inner wall of the mounting frame 330, or by a first blade 311 and a second blade 312 belonging to different first cutters 310 among two adjacent first cutters 310, a segmented cutter, and one inner wall of the mounting frame 330; the cutting channel 301 located at the corner of the cutting device 300 is formed by a first blade 311, a segmented cutter, and one corner of the mounting frame 330, or by a second blade 312, a segmented cutter, and one corner of the mounting frame 330, and the cutting parts of the segmented cutters are all cutting blades, which extend along the second direction.

[0039] When the cutting device 300 is working, as the biomass block 200 is pressed and contacted by the first blade 311, the second blade 312, and the second cutter 320 of the cutting device 300 under the pressure provided by the pressure supply device 100, the part of the biomass block 200 near the separation gap 302 is squeezed into the separation gap 302. Subsequently, the rotating cutter 313 driven by the second driving component cuts the biomass block 200 along the first direction. At the same time, the biomass block 200 is pressed and contacted by the cutting edge of the second cutter 320 and cut along the second direction by the cutting edge of the second cutter. As the biomass block 200 continues to contact the cutting device 300, the biomass block 200 is cut into multiple strips. The strips enter the cutting channel 301 and, under the continuous pressure of the pressure supply device 100, enter the cavity 401 below for compression, pressure holding, and shaping. The first cutter 310 with a rotating blade 313 can cut the biomass block 200 by actively rotating the blade 313. Therefore, cutting can be achieved simply by the biomass block 200 entering the partition gap 302 and contacting the rotating blade 313. There is no need to apply greater cutting pressure to the biomass block. Compared with the first cutter mentioned above, the cutting pressure applied by the pressure supply device 100 is greatly reduced, thereby reducing power consumption and avoiding the phenomenon that the biomass block cannot be cut by using traditional blades.

[0040] like Figure 13As shown, in some embodiments, in the axial direction of the cutting channel 301, the side of the first blade 311 near the receiving cavity 611 is closer to the receiving cavity 611 than the side of the second blade 312 near the receiving cavity 611. That is, the top cutting portion of the first blade 311 and the top cutting portion of the second blade 312 are not at the same height, and the top of the first blade 311 is higher than the top of the second blade 312. By setting the top heights of the first blade 311 and the second blade 312 to be different, the top of the first blade 311 is the first to contact the biomass block 200 during the pressing and cutting process. Since the area in contact with the biomass block 200 at the same time is reduced, the pressure applied during the pressing of the biomass block 200 can be further reduced, and the straw can more easily enter the separating gap 302.

[0041] like Figure 13 As shown, in some embodiments, the tops of the first blade 311 and the second blade 312 are sharp edges, which can further reduce the contact area with the biomass block 200, thereby reducing the required cutting pressure and facilitating the introduction of straw into the separation gap 302 and the cutting channel 301.

[0042] like Figure 13 As shown, in some embodiments, in the axial direction of the cutting channel 301, the side of the first cutter 310 near the receiving cavity 611 is closer to the receiving cavity 611 than the side of the second cutter 320 near the receiving cavity 611. That is, the cutting part of the first cutter 310 is higher than the cutting part of the second cutter 320. Specifically, the top heights of the first blade 311 and the second blade 312 are not the same as the top height of the second cutter 320. The top heights of the first blade 311 and the second blade 312 are higher, so that when the biomass block 200 is pressed and cut, it first contacts the first cutter 310, requiring relatively less cutting pressure and making it easier to cut. Then the biomass block 200 contacts the second cutter 320 for cutting, avoiding the situation where the first cutter 310 and the second cutter 320 simultaneously contact and cut the biomass block 200, which would increase the required cutting pressure. In addition, the number of first cutters 310 with rotating blades 313 can be greater than the number of second cutters, that is, the first cutters 310 are arranged more densely and the second cutters 320 are arranged more sparsely, so as to reduce the applied pressure, reduce power consumption, and simplify the structural arrangement.

[0043] In some embodiments, the cutting blade 3132 is spirally extended along the axial direction of the rotating shaft 3131. The number of cutting blades 3132 can be one or more, specifically one, two, three, four, five, six, seven, eight, nine, ten, etc. The more cutting blades 3132 there are, the higher the cutting efficiency.

[0044] like Figure 1As shown, this embodiment provides a specific pressure supply device 100, including a press 110. The press 110 has a movable pressure head 120, which is located above the receiving frame 600. The press 110 can drive the movable pressure head 120 to move within the receiving cavity 611 in a direction close to or away from the cutting device 300, for applying cutting pressure to the biomass blocks 200. The press 110 can be a hydraulic press, pneumatic press, or other device capable of providing pressure; the pressure provided by a hydraulic press is more stable.

[0045] During operation, biomass blocks 200 are placed into the receiving cavity 611. The receiving frame 600 can be moved to the position of the press 110, located below the movable pressure head 120, so that the movable pressure head 120 is directly above the receiving cavity 611. Then, the press 110 drives the movable pressure head 120 downwards towards the biomass block 200. As the movable pressure head 120 continuously presses down, it directly applies pressure to the biomass block 200, pressing it down. Simultaneously, this pressure, along with the cutting device 300, cuts the biomass block 200 into strips. As the movable pressure head 120 continues to press down, the strips enter the mold 400 for pressure holding and are extruded from the second opening of the cavity 401. Finally, the extruded strips are cut into shorter small pieces by the cutting device 500. Throughout this process, the position of the receiving frame 600 remains fixed. This pressure supply device 100 has a simple structure, provides stable pressure, and is easy to operate.

[0046] like Figure 7 and Figure 8As shown, this embodiment provides another pressure supply device 100, wherein the cutting device 300, the mold 400 and the cutting device 500 are all fixedly disposed in the receiving frame 600. Specifically, the receiving frame 600 includes an upper frame 610 and a lower frame 620. The cutting device 300 and the mold 400 are fixed between the upper frame 610 and the lower frame 620 by a flange structure, and the cutting device 500 is fixed inside the lower frame 620. The pressure supply device 100 includes a press 110, which can be a hydraulic press or a pneumatic press. The press 110 includes a fixed pressure head 130 and a lifting pressure head 140. The fixed pressure head 130 is located above the receiving cavity 611. The lifting pressure head 140 is located at the bottom of the receiving frame 600, that is, the receiving frame 600 is placed on the top surface of the lifting pressure head 140. The press 110 can drive the lifting pressure head 140 to rise or fall, so as to drive the receiving frame 600 to move in a direction close to or away from the fixed pressure head 130. Since the cutting device 300, the mold 400 and the cutting device 500 are all fixed on the receiving frame 600, these components rise and fall together with the receiving frame 600. Since the cutting device 300 moves relative to the fixed pressure head 130, it can drive the biomass block 200 closer to the fixed pressure head 130. Cutting pressure is applied to the biomass block 200 through the fixed pressure head 130 and the cutting device 300.

[0047] When the pressure supply device 100 is working, the biomass block 200 is first placed into the receiving cavity 611. Then, the press 110 drives the lifting pressure head 140 to rise, which in turn drives the receiving frame 600 and the various components fixed to the receiving frame 600 and the biomass block 200 to rise together, close to the fixed pressure head 130 above. As the receiving frame 600 continues to rise, the fixed pressure head 130 extends into the receiving cavity 611 and contacts the top surface of the biomass block 200. The receiving frame 600 continues to rise, and the cutting device 300, which rises along with it, continuously presses and cuts the biomass block 200 from below, gradually cutting it into strips. As the receiving frame 600 continues to rise, the strips enter the cavity 401. After extrusion, the cutting device 500, which rises along with it, cuts the strips into small pellets. Compared to traditional pressure supply devices that compress biomass blocks from above using a moving pressure head, resulting in increasingly dense blocks that can only be cut by a lower cutting device after compaction, this method requires significant cutting force and consumes relatively high power due to the short pressure transmission distance (a few centimeters). In this embodiment, the pressure supply device 100 drives the cutting device 300 upwards from below via a lifting pressure head 140. This allows the cutting device 300 to move upwards, pressing and cutting the biomass blocks 200. This continuous cutting before the blocks are fully compressed significantly reduces cutting and pressing pressure, preventing blockages and further reducing the power consumption of the pressure supply device.

[0048] The pressure supply device 100 can be used with a cutting device 300 having a rotating blade 313 to further reduce the required cutting and pressing pressure and reduce power consumption. It can also be used with a cutting device 300 where the cutting parts of the first cutter 310 and the second cutter 320 are both cutting blades. Figure 1 The pressure supply device 100 shown can also be used with the cutting device 300 having a rotating blade 313. The mold 400 and the cutting device 500 in the above embodiments can both be used with the cutting device 300 having a rotating blade 313.

[0049] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0050] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A biomass pelleting equipment, characterized in that, include: A receiving frame having a receiving cavity for receiving the biomass blocks; A cutting device is disposed below the receiving cavity. The cutting device includes at least two first cutters and at least two second cutters. The at least two first cutters extend along a first direction and are spaced apart along a second direction. The at least two second cutters extend along the second direction and are spaced apart along the first direction. The at least two first cutters and the at least two second cutters form a cutting channel. The cutting portions of the first cutters and the second cutters face the receiving cavity and are used to cut the biomass block into strip-shaped pieces. A mold is disposed below the cutting device, and the mold has a cavity that communicates with the cutting channel. A pressure supply device is used to apply cutting pressure to the biomass blocks; A cutting device is located below the mold and is used to cut the strip material into pellets.

2. The biomass pelletizing equipment according to claim 1, characterized in that, The receiving frame includes a separate upper frame and a lower frame, and the cutting device and the mold are detachably connected between the upper frame and the lower frame.

3. The biomass pelletizing equipment according to claim 1, characterized in that, The cross-sectional area of ​​the first opening of the cavity near the cutting channel is greater than the cross-sectional area of ​​the second opening away from the cutting channel.

4. The biomass pelletizing equipment according to claim 3, characterized in that, The ratio of the cross-sectional area of ​​the first opening to the cross-sectional area of ​​the second opening is greater than or equal to 3:1, and / or the angle between the inner wall of the cavity and the axis of the cavity is 10°~45°.

5. The biomass pelletizing equipment according to claim 1, characterized in that, The cutting device includes: Rotary cutter and first drive component, The rotary cutter is located below the mold and is connected to the drive end of the first drive component. The first drive component is used to drive the rotary cutter to rotate in a plane perpendicular to the axial direction of the cavity. The rotary cutter is used to cut the strip material into the granules.

6. The biomass pelletizing equipment according to claim 1, characterized in that, The first cutter includes: A first blade and a second blade extending along the first direction, the first blade and the second blade being disposed opposite to each other along the second direction, and a separation gap existing between the first blade and the second blade; A rotating cutter is located in the partition gap. The rotating cutter includes a rotating shaft and a cutting blade disposed on the outer surface of the rotating shaft. The axis of the rotating shaft is parallel to the first direction. The second driving component is connected to the rotating shaft and is used to drive the rotating shaft to rotate.

7. The biomass pelletizing equipment according to claim 6, characterized in that, Along the axial direction of the cutting channel, the cutting portion of the first blade is higher than the cutting portion of the second blade.

8. The biomass pelletizing equipment according to claim 6, characterized in that, The cutting blade is spirally extended along the axis of the rotating shaft.

9. The biomass pelletizing equipment according to any one of claims 1-8, characterized in that, Along the axial direction of the cutting channel, the cutting portion of the first cutter is higher than the cutting portion of the second cutter.

10. The biomass pelletizing equipment according to any one of claims 1-8, characterized in that, The pressure supply device includes a press with a movable pressure head located above the receiving frame. The press can drive the movable pressure head to move in the receiving cavity in a direction close to or away from the cutting device to apply cutting pressure to the biomass block.

11. The biomass pelletizing equipment according to any one of claims 1-8, characterized in that, The cutting device, the mold, and the slitting device are all fixedly installed inside the receiving frame; The pressure supply device includes a press, the press comprising: A fixed pressure head is fixedly disposed above the receiving cavity; A lifting pressure head is located at the bottom of the receiving frame. The press can drive the lifting pressure head to rise or fall, thereby driving the receiving frame to move in a direction close to or away from the fixed pressure head, in order to apply cutting pressure to the biomass block.

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