Biomass fuel crushing and screening device

Abstract

The utility model discloses a kind of biomass fuel crushing screening devices, it is related to biomass fuel production technical field.The biomass fuel crushing screening device, including base, the upper end of base is equipped with filter box;Screening assembly includes first filter plate, the right side of fixed plate is fixedly connected with second driving motor, the output of second driving motor is fixedly connected with shaft, the surface of shaft is fixedly connected with spiral conveying blade, the inside of filter box is fixedly connected with second filter plate being inclinedly arranged, device is classified screening using two groups of first filter plate and second filter plate arranged above and below, can efficiently separate out coarse particle fuel;Second filter plate is inclinedly arranged, further divide fuel passing through first filter plate into medium granularity and fine granularity;This three-stage screening mode meets the differentiating demand of fuel granularity for different combustion equipment, avoids the granularity mixed problem caused by single filter screen screening, improves fuel utilization, reduces resource waste.

Description

Technical Field

[0001] This utility model relates to the field of biomass fuel production technology, and in particular to a biomass fuel crushing and screening device. Background Technology

[0002] With the global trend towards a clean energy transition, biomass fuel, as a renewable and green energy source, is increasingly being used in industrial heating and power generation due to its wide availability and low carbon emissions. Biomass fuel mainly originates from crop straw, forestry waste, and livestock manure. These raw materials are often large and irregular in shape, requiring processing such as crushing and screening to form uniformly sized fuel particles to meet the high-efficiency and stable operation requirements of combustion equipment. Therefore, crushing and screening, as key steps in biomass fuel pretreatment, directly affect the fuel's combustion efficiency and application effectiveness. Traditional biomass fuel crushing and screening devices have many problems in practical applications. In the crushing stage, existing crushing devices mostly use a single crushing structure, such as a hammer crusher or a shear crusher. For biomass materials that are hard or have complex fiber structures (such as wood fiber waste), there is often insufficient crushing, resulting in a large number of large particles still mixed in the material. This not only affects the efficiency of subsequent screening, but also reduces combustion efficiency and increases energy consumption due to uneven fuel particle size. In the screening stage, traditional devices typically use only one set of filters for simple screening, separating the crushed material into coarse and fine particles. This grading method cannot meet the diverse needs of different combustion equipment for fuel particle size. For example, small boilers require finer fuel particles to ensure complete combustion, while large industrial furnaces can accommodate medium-sized fuels to improve feeding efficiency. Furthermore, the screening accuracy of a single filter is limited; medium-sized particles can easily mix into the fine material, and the coarse material may also contain some directly usable fine particles, resulting in poor screening and grading effects and reduced fuel utilization. Therefore, this invention proposes a novel solution. Utility Model Content

[0003] The purpose of this invention is to solve at least one of the technical problems existing in the prior art, and to provide a biomass fuel crushing and screening device that can solve the problems of limited screening accuracy of a single filter screen, easy mixing of medium-sized particles into fine materials, and the possibility that coarse materials may also contain some directly usable fine materials, resulting in poor screening and grading effect and reduced fuel utilization.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a biomass fuel crushing and screening device, including a base, with a filter box installed at the upper end of the base; The screening assembly is located inside the filter box. The screening assembly includes a first filter plate, and an inclined fixing plate is fixedly connected to the right side of the filter box. A second drive motor is fixedly connected to the right side of the fixed plate, and a rotating shaft is fixedly connected to the output end of the second drive motor. Spiral conveying blades are fixedly connected to the surface of the rotating shaft. A first discharge hopper is fixedly connected to the left side of the filter box. The filter box has a second filter plate that is set at an inclination inside, and a pulverizing box is fixedly connected to the top of the filter box. A fuel guide plate is fixedly connected inside the filter box, and the fuel guide plate is located between the first filter plate and the second filter plate.

[0005] Preferably, the screening assembly further includes a fuel collection box, which is fixedly connected to the upper end of the base, and an auger fixing plate is fixedly connected to the left side of the filter box. An inclined conveying auger is fixedly connected inside the auger fixing plate, and the inlet of the conveying auger is connected to the outlet of the fuel collection box. The discharge port of the conveying auger is located above the feed port of the crushing box.

[0006] Preferably, a first drive motor is fixedly connected to the right side of the crushing box, and two fuel crushing rollers are rotatably connected inside the crushing box, with gears fixedly connected to the left side of each of the two fuel crushing rollers; The output end of the first drive motor is connected to the corresponding fuel crushing roller, and the two gears mesh with each other.

[0007] Preferably, the inside of the crushing box is fixedly connected to two inclined guide plates.

[0008] Preferably, the upper section of the first filter plate is inclined and the lower section of the first filter plate is arc-shaped, and the surface of the first filter plate is uniformly provided with sieve holes.

[0009] Preferably, the first filter plate is tilted forward and to the right inside the filter box.

[0010] Preferably, the surface of the fixing plate is provided with a discharge groove, and a baffle is fixedly connected to the discharge groove of the fixing plate by bolts.

[0011] Preferably, the bottom of the fuel collection tank is inclined toward the conveying auger.

[0012] Preferably, a second hopper is fixedly connected to the rear side of the filter box.

[0013] Preferably, the bottom of the filter box is funnel-shaped, and a discharge pipe is fixedly connected to the bottom of the filter box.

[0014] Compared with the prior art, the beneficial effects of this utility model are: 1. This biomass fuel crushing and screening device employs two sets of upper and lower filter plates for graded screening. The upper section of the first filter plate is inclined, and the lower section is arc-shaped, with the entire plate tilted forward and to the right. Combined with uniformly spaced sieve holes, it can efficiently separate coarse fuel particles. The second filter plate is also inclined, further separating the fuel passing through the first filter plate into medium and fine particles. This three-stage screening mode can accurately meet the differentiated requirements of different combustion equipment for fuel particle size, avoiding the particle size mixing problem caused by traditional single-screen screening, significantly improving fuel utilization and reducing resource waste.

[0015] 2. This biomass fuel crushing and screening device consists of a coarse material circulation system composed of a fuel collection box, a conveying auger, and other structures. The coarse fuel particles screened by the first filter plate can enter the fuel collection box under the push of the spiral conveying blades, and then be conveyed back to the crushing box for secondary crushing by the conveying auger. This design effectively solves the problem of insufficient crushing in traditional devices. Especially for biomass materials with hard texture or complex fiber structure, it can ensure uniform fuel particles through circulating crushing, improve subsequent combustion efficiency, reduce energy consumption, and avoid resource waste caused by direct disposal of coarse materials. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the structure of a biomass fuel crushing and screening device according to the present invention; Figure 2 This is a schematic diagram of the second hopper of this utility model; Figure 3 This is a schematic diagram of the second filter plate of this utility model; Figure 4 This is a schematic diagram of the fixing plate of this utility model; Figure 5 This is a schematic diagram of the fuel guide plate of this utility model; Figure 6 This is a schematic diagram of the pulverizing box of this utility model; Figure 7 This is a schematic diagram of the first filter plate of this utility model.

[0017] Reference numerals: 1. Base; 2. Filter box; 3. Fuel collection box; 4. Conveying auger; 5. Auger fixing plate; 6. Crushing box; 7. First drive motor; 8. Fuel crushing roller; 9. Gear; 10. Guide plate; 11. Fixing plate; 12. Baffle; 13. First filter plate; 14. First discharge hopper; 15. Second drive motor; 16. Rotating shaft; 17. Spiral conveying blade; 18. Fuel guide plate; 19. Second filter plate; 20. Second discharge hopper; 21. Discharge pipe. Detailed Implementation

[0018] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0019] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional 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.

[0020] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of terms like "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.

[0021] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0022] Please see Figure 1-7 This utility model provides a technical solution: a biomass fuel crushing and screening device, including a base 1, a filter box 2 installed on the upper end of the base 1, and a screening component. The screening component is set inside the filter box 2 and includes a first filter plate 13. An inclined fixing plate 11 is fixedly connected to the right side of the filter box 2. A second drive motor 15 is fixedly connected to the right side of the fixing plate 11. A rotating shaft 16 is fixedly connected to the output end of the second drive motor 15. A spiral conveying blade 17 is fixedly connected to the surface of the rotating shaft 16. A first discharge hopper 14 is fixedly connected to the left side of the filter box 2. An inclined second filter plate 19 is fixedly connected inside the filter box 2. A crushing box 6 is fixedly connected to the upper end of the filter box 2. A fuel guide plate 18 is fixedly connected inside the filter box 2 and is located between the first filter plate 13 and the second filter plate 19.

[0023] The screening assembly also includes a fuel collection box 3, which is fixedly connected to the upper end of the base 1. An auger fixing plate 5 is fixedly connected to the left side of the filter box 2. An inclined conveying auger 4 is fixedly connected inside the auger fixing plate 5. The inlet of the conveying auger 4 is connected to the outlet of the fuel collection box 3, and the outlet of the conveying auger 4 is located above the inlet of the crushing box 6.

[0024] A first drive motor 7 is fixedly connected to the right side of the crushing box 6. Two fuel crushing rollers 8 are rotatably connected inside the crushing box 6. Gears 9 are fixedly connected to the left side of each of the two fuel crushing rollers 8. The output end of the first drive motor 7 is connected to the corresponding fuel crushing roller 8, and the two gears 9 mesh with each other.

[0025] The crushing box 6 has two inclined guide plates 10 fixedly connected inside.

[0026] The upper section of the first filter plate 13 is inclined and the lower section of the first filter plate 13 is arc-shaped. The surface of the first filter plate 13 is uniformly provided with sieve holes.

[0027] The first filter plate 13 is tilted forward and to the right inside the filter box 2.

[0028] A discharge groove is provided on the surface of the fixing plate 11, and a baffle 12 is fixedly connected to the discharge groove on the surface of the fixing plate 11 by bolts.

[0029] The bottom of the fuel collection tank 3 is inclined toward the conveying auger 4.

[0030] A second hopper 20 is fixedly connected to the rear side of the filter box 2.

[0031] The bottom of the filter box 2 is funnel-shaped, and a discharge pipe 21 is fixedly connected to the bottom of the filter box 2.

[0032] When using the device, the biomass fuel to be processed first enters the crushing box 6. The two inclined guide plates 10 inside the crushing box 6 guide the fuel to the space between the two fuel crushing rollers 8. After the first drive motor 7 starts, its output end drives the corresponding fuel crushing roller 8 to rotate. Since the gears 9 on the left side of the two fuel crushing rollers 8 mesh with each other, the two crushing rollers rotate synchronously in opposite directions. Through compression and shearing, the biomass fuel is crushed into initial particles. The crushed fuel falls into the filter box 2 under the action of gravity and enters the screening stage.

[0033] After being crushed, the fuel enters the filter box 2 and first falls onto the first filter plate 13. The upper section of the first filter plate 13 is inclined, and the lower section is arc-shaped. The entire plate is inclined forward and to the right, and its surface has evenly distributed sieve holes for primary screening of the fuel. Fuel particles smaller than the sieve holes pass through the first filter plate 13, are guided by the fuel guide plate 18, and fall precisely onto the surface of the second filter plate 19 for secondary screening. Coarse fuel particles larger than the sieve openings slide along the inclined surface of the first filter plate 13 and are guided by the arc-shaped lower section to converge in the area of ​​the fixed plate 11 on the right side of the filter box 2.

[0034] The fuel falling onto the second filter plate 19 undergoes secondary screening: Fuel with a medium particle size is intercepted by the second filter plate 19, slides along its inclined direction, and is finally discharged through the second discharge hopper 20 at the rear of the filter box 2, and is collected as medium particle size fuel. The finest fuel particles pass through the second filter plate 19 and fall into the bottom of the funnel-shaped filter box 2, where they are discharged through the discharge pipe 21 at the bottom and collected as fine-particle fuel.

[0035] The coarse fuel particles filtered out by the first filter plate 13 accumulate in the area of ​​the fixed plate 11. At this time, the second drive motor 15 starts, driving the rotating shaft 16 and the spiral conveying blades 17 on the surface to rotate. The spiral conveying blades 17 push the coarse fuel particles along the fixed plate 11. If secondary crushing of coarse particles is required, they can be conveyed to the fuel collection box 3 by the spiral conveyor blades 17. The bottom of the fuel collection box 3 is inclined towards the conveying auger 4 to ensure that the fuel enters the conveying auger 4 smoothly. With the support of the auger fixing plate 5, the conveying auger 4 conveys the coarse fuel particles back to the feed inlet of the crushing box 6 to achieve cyclic crushing and improve the fullness of crushing.

[0036] If there is no need for circulating crushing, coarse fuel particles can be directly discharged and collected through the first discharge hopper 14 on the left side of the filter box 2, or the baffle 12 at the discharge trough on the surface of the fixed plate 11 can be removed to collect coarse fuel particles directly from the discharge trough.

[0037] After the device completes the crushing and screening operations, if there is any untreated fuel remaining on the surface of the first filter plate 13, the residual fuel can be discharged and cleaned from the discharge chute of the fixed plate 11 by removing the baffle 12. At the same time, the device supports separate collection modes for coarse, medium and fine particle fuels. By controlling the discharge path of coarse particle fuel (the discharge chute of the first discharge hopper 14 or 11), it can flexibly adapt to the fuel particle size requirements in different scenarios.

[0038] Furthermore, the device employs two sets of vertically arranged first filter plates 13 and second filter plates 19 for graded screening. The upper section of the first filter plate 13 is inclined, and the lower section is arc-shaped, with the entire plate tilted forward and to the right. Combined with the uniformly opened sieve holes on the surface, it can efficiently separate coarse fuel particles. The second filter plate 19 is also tilted, further separating the fuel passing through the first filter plate 13 into medium and fine particles. This three-stage screening mode can accurately meet the differentiated requirements of different combustion equipment for fuel particle size, avoid the particle size mixing problem caused by traditional single-screen screening, significantly improve fuel utilization, and reduce resource waste.

[0039] The device consists of a coarse material circulation system composed of a fuel collection box 3, a conveying auger 4, and other structures. The coarse fuel particles screened by the first filter plate 13 can enter the fuel collection box 3 under the push of the spiral conveying blades 17, and then be conveyed back to the crushing box 6 for secondary crushing by the conveying auger 4. This design effectively solves the problem of insufficient crushing in traditional devices. Especially for biomass materials with hard texture or complex fiber structure, it can ensure uniform fuel particles through circulation crushing, improve subsequent combustion efficiency, reduce energy consumption, and avoid resource waste caused by direct disposal of coarse materials.

[0040] Structural Description: Base 1: As the basic support structure of the entire device, it provides a stable installation platform for various components such as filter box 2 and fuel collection box 3, ensuring the overall stability of the device during operation; Filter box 2: It is the main place for screening operations. It contains the screening components and provides a closed space for the grading and screening of biomass fuel. At the same time, it protects the internal components and guides the flow of materials. Fuel collection box 3: used to temporarily collect coarse fuel particles screened out by the first filter plate 13. Its bottom is inclined towards the conveying auger 4 to ensure that the coarse material enters the conveying auger 4 smoothly and provides a transitional storage space for the recycling and crushing of the coarse material. Conveying auger 4: Installed on the auger fixing plate 5, it is inclined and responsible for conveying the coarse fuel particles in the fuel collection box 3 to the feed inlet of the crushing box 6, realizing the automated circulation crushing of coarse materials and connecting the screening and crushing links. Screw fixing plate 5: It fixes and supports the conveying auger 4, ensuring that the conveying auger 4 operates stably in an inclined state and ensuring the smooth material conveying process; Crushing box 6: This is the core area for biomass fuel crushing operations. It provides installation space for internal components such as fuel crushing rollers 8 and guide plates 10, and completes the crushing process of fuel through the synergistic action of the internal structure. The first drive motor 7 provides power for the rotation of the fuel crushing roller 8. Its output end drives the corresponding fuel crushing roller 8 to rotate, and then through gear transmission, the two crushing rollers rotate synchronously in opposite directions to achieve the crushing of fuel. Fuel crushing roller 8: Two fuel crushing rollers 8 rotate in opposite directions under the drive of the first drive motor 7. They crush biomass fuel into initial particles through extrusion and shearing action. They are the key actuators in the crushing process. Gear 9: Two gears 9 mesh with each other to achieve synchronous reverse rotation of the two fuel crushing rollers 8, ensuring the stability and efficiency of the crushing process; The guide plate 10 is fixed in an inclined shape inside the crushing box 6. It can guide the biomass fuel entering the crushing box 6 to the space between the two fuel crushing rollers 8, ensuring that the fuel accurately enters the crushing area and improving the crushing efficiency. Fixed plate 11: It is fixed at an angle to the right side of the filter box 2, providing mounting support for the second drive motor 15, the rotating shaft 16 and the spiral conveying blade 17. At the same time, the discharge groove on its surface can be used to discharge coarse particulate fuel. Baffle 12: It is fixed to the discharge chute of the fixed plate 11 by bolts. It can be disassembled as needed to control the opening and closing of the discharge chute and realize the flexible discharge or interception of coarse particulate fuel. First filter plate 13: The upper section is inclined plate and the lower section is arc plate. The whole plate is inclined forward and to the right. The surface is evenly opened with screen holes. It is used to perform primary screening of the crushed fuel and separate coarse fuel particles from the fuel that can enter the secondary screening. First discharge hopper 14: Fixed on the left side of filter box 2, used to discharge coarse fuel particles screened by first filter plate 13, providing a discharge channel for coarse materials that are not recycled and crushed; The second drive motor 15 provides power for the rotation of the rotating shaft 16 and the spiral conveying blade 17, driving the spiral conveying blade 17 to push the coarse fuel particles in the area of ​​the fixed plate 11 to the designated position. Rotating shaft 16: Rotates under the drive of the second drive motor 15, providing a mounting carrier for the spiral conveyor blades 17 and transmitting power, so that the spiral conveyor blades 17 can realize the material conveying function. Spiral conveyor blade 17: Fixed on the surface of the rotating shaft 16, rotating with the rotating shaft 16, pushing the coarse fuel particles gathered in the area of ​​the fixed plate 11 along the fixed plate 11, which can be sent to the fuel collection box 3 or the first discharge hopper 14, controlling the conveying path of the coarse material. Fuel guide plate 18: guides the fuel passing through the first filter plate 13 to fall precisely onto the surface of the second filter plate 19, ensuring the smooth progress of secondary screening and preventing material spillage; The second filter plate 19 is inclined and installed inside the filter box 2. It is used to perform secondary screening of the fuel that has been screened by the first filter plate 13, to retain medium-sized fuel and allow fine-sized fuel to pass through, thereby achieving medium and fine classification of fuel. The second discharge hopper 20 is fixed to the rear side of the filter box 2 and is used to discharge the medium-sized fuel intercepted by the second filter plate 19, providing a collection channel for the medium-sized fuel. Discharge pipe 21: Fixed at the bottom of filter box 2. The bottom of filter box 2 is funnel-shaped, which facilitates the collection of fine-particle fuel passing through the second filter plate 19 and discharge through discharge pipe 21, thereby realizing the collection of fine-particle fuel.

[0041] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A biomass fuel crushing and screening device, characterized in that: Includes a base (1), and a filter box (2) is installed on the upper end of the base (1); The screening assembly is located inside the filter box (2). The screening assembly includes a first filter plate (13). An inclined fixing plate (11) is fixedly connected to the right side of the filter box (2). A second drive motor (15) is fixedly connected to the right side of the fixed plate (11), and a rotating shaft (16) is fixedly connected to the output end of the second drive motor (15). A spiral conveying blade (17) is fixedly connected to the surface of the rotating shaft (16), and a first discharge hopper (14) is fixedly connected to the left side of the filter box (2). The filter box (2) is fixedly connected to a second filter plate (19) that is set at an inclination, and the filter box (2) is fixedly connected to a crushing box (6) at the top. A fuel guide plate (18) is fixedly connected inside the filter box (2), and the fuel guide plate (18) is located between the first filter plate (13) and the second filter plate (19).

2. The biomass fuel crushing and screening device according to claim 1, characterized in that: The screening assembly also includes a fuel collection box (3), which is fixedly connected to the upper end of the base (1), and an auger fixing plate (5) is fixedly connected to the left side of the filter box (2). An inclined conveying auger (4) is fixedly connected inside the auger fixing plate (5), and the inlet of the conveying auger (4) is connected to the outlet of the fuel collection box (3); The discharge port of the conveying auger (4) is located above the inlet of the crushing box (6).

3. The biomass fuel crushing and screening device according to claim 1, characterized in that: The first drive motor (7) is fixedly connected to the right side of the crushing box (6), and two fuel crushing rollers (8) are rotatably connected inside the crushing box (6). Gears (9) are fixedly connected to the left side of each of the two fuel crushing rollers (8). The output end of the first drive motor (7) is connected to the corresponding fuel crushing roller (8), and the two gears (9) mesh with each other.

4. The biomass fuel crushing and screening device according to claim 3, characterized in that: The crushing box (6) has two inclined guide plates (10) fixedly connected inside.

5. The biomass fuel crushing and screening device according to claim 1, characterized in that: The upper section of the first filter plate (13) is inclined and the lower section of the first filter plate (13) is arc-shaped. The surface of the first filter plate (13) is uniformly provided with sieve holes.

6. The biomass fuel crushing and screening device according to claim 1, characterized in that: The first filter plate (13) is tilted forward and to the right inside the filter box (2).

7. The biomass fuel crushing and screening device according to claim 1, characterized in that: The surface of the fixing plate (11) is provided with a discharge groove, and a baffle (12) is fixedly connected to the discharge groove of the surface of the fixing plate (11) by bolts.

8. A biomass fuel crushing and screening device according to claim 2, characterized in that: The bottom of the fuel collection tank (3) is inclined toward the conveying auger (4).

9. A biomass fuel crushing and screening device according to claim 2, characterized in that: The filter box (2) is fixedly connected to the rear side of the second discharge hopper (20).

10. A biomass fuel crushing and screening device according to claim 1, characterized in that: The bottom of the filter box (2) is funnel-shaped, and a discharge pipe (21) is fixedly connected to the bottom of the filter box (2).

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