Particle screening and grading device for biomass particle fuel production

Abstract

The utility model relates to the technical field of biomass fuel, and discloses a particle screening and grading device for biomass particle fuel production, a rectangular mounting column is vertically arranged in the middle of a mounting bottom plate, and four groups of mutually attached particle storage assemblies are arranged on the four sides of the top end of the rectangular mounting column; a rectangular screening shell is arranged on the top face of the rectangular mounting column, two screening and grading assemblies are arranged in the rectangular screening shell, and the two screening and grading assemblies rotate by 90 degrees. The particle storage assemblies which are attached to one another are arranged and can be used for temporarily storing screened particles, and workers can conveniently conduct classification and recognition; the two screening and grading assemblies are arranged and rotate by 90 degrees, the screening frame in each screening and grading assembly inclines in different directions, meanwhile, the hole diameter of a screening plate is large in the upper portion and small in the lower portion, particles can be screened in sequence, and the discharging grooves communicated with the screening and grading assemblies form a four-direction flow dividing grading system. Classification of multi-level granularity can be completed at a time, and the classification efficiency is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of biomass fuel technology, specifically to a pellet screening and grading device for biomass pellet fuel production. Background Technology

[0002] Biomass fuel is a renewable energy source produced from agricultural and forestry waste (such as straw, sawdust, and rice husks) through processes such as crushing, drying, and compression. Its advantages are significant: raw material sources are wide-ranging, including agricultural waste, forestry residues, and energy crops; emissions of sulfur oxides and nitrogen oxides are low during combustion, and carbon dioxide can be absorbed by plants, forming a carbon cycle, making it highly environmentally friendly; moreover, as a renewable resource, it can be planted and harvested year after year, ensuring a continuous energy supply. In the production process of biomass fuel, the screening and grading of biomass fuel pellets is a crucial step in ensuring its quality and performance. Screening and grading not only optimizes the combustion performance of biomass fuel and improves energy utilization efficiency but also protects combustion equipment and extends its service life. Furthermore, graded fuel can be widely used in areas such as home heating, industrial boilers, and biomass power generation, meeting diverse needs in different scenarios and promoting the healthy development of the biomass energy industry.

[0003] However, existing biomass fuel pellets typically employ a single sieve layer and a single-direction screening method during screening, which can easily lead to pellet accumulation and incomplete screening. This results in low grading efficiency and a wide particle size distribution range, failing to meet the fine grading requirements of biomass fuels for multi-level particle size. Furthermore, since pellets can only pass through the sieve layer from a single angle, some pellets may be discharged without sufficient contact with the sieve openings due to accumulation or a single movement trajectory, causing missed screening or incorrect screening. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a pellet screening and grading device for biomass pellet fuel production, which solves the problems of pellet accumulation and incomplete screening caused by the use of a single sieve layer and a single-direction screening method during pellet screening.

[0005] To achieve the above objectives, this utility model provides the following technical solution: It includes a mounting base plate, a rectangular mounting column vertically arranged in the middle of the mounting base plate, four sets of mutually attached particle storage components arranged on the four sides of the top of the rectangular mounting column, a rectangular screening shell with its bottom surface attached to the top surface of the particle storage components arranged on the top surface of the rectangular mounting column, a feed inlet arranged on the top surface of the rectangular screening shell, and two sets of screening and grading components arranged inside the rectangular screening shell. The two sets of screening and grading components are rotated 90 degrees, and the discharge points of each set of screening and grading components point to the symmetrical sides of the rectangular screening shell, corresponding one-to-one with the particle storage components on the corresponding side.

[0006] Furthermore, the particle storage assembly includes a symmetrical trapezoidal storage box with a side angle of 45 degrees. The storage boxes of the four particle storage assemblies are fitted together. The inner side of the storage box is mounted on the side of a rectangular mounting column. A discharge port is provided on the top surface of the storage box, and a discharge pipe is provided on the bottom surface of the storage box. A flow valve is provided inside the discharge pipe.

[0007] Furthermore, the screening and grading component includes symmetrically arranged screening side plates, with two screening frames staggered vertically between the two screening side plates. The upper screening frame tilts to the left, and the lower screening frame tilts to the right. Screening plates are installed on the screening frames, with the aperture of the lower screening plate being smaller than that of the upper screening plate. A vibration generator is fixedly connected to the bottom surface of the screening frame. A barrier plate is attached to the end of the screening plate, and the other side of the barrier plate is attached to the inner wall of the rectangular screening housing. An electric telescopic rod is provided on the top surface of the barrier plate. The fixed end of the electric telescopic rod is connected to the inner wall of the rectangular screening housing, and the telescopic end of the electric telescopic rod is connected to the top surface of the barrier plate. A feeding trough is provided at each attachment position of the barrier plate on the inner wall of the rectangular screening housing. There are four feeding troughs in total, which are connected to the bottom surface of the rectangular screening housing and are respectively connected to the feeding ports of the four storage boxes.

[0008] Furthermore, a T-shaped block is fixedly installed inside the storage box. The T-shaped block slides up and down in the middle of the side of the rectangular mounting column. The rectangular mounting column has a sliding groove for the T-shaped block to slide.

[0009] Furthermore, the top surface of the mounting base is symmetrically provided with support columns that fit against the corners of the storage box.

[0010] Furthermore, an observation window is provided in the middle of the outer side of the storage box, and the observation window is provided with capacity scale.

[0011] Furthermore, a rectangular limiting post is provided in the middle of the bottom surface of the rectangular screening shell, and a limiting groove for placing the rectangular limiting post is opened in the middle of the top surface of the rectangular mounting post.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. By setting up four sets of interlocking particle storage components, screened particles can be temporarily stored, facilitating classification and identification by staff. By setting up two sets of screening and grading components, which are rotated at 90 degrees, and the screening frames within each set are tilted in different directions (left at the top and right at the bottom), while the sieve aperture is larger at the top and smaller at the bottom, this design creates a three-dimensional and multi-directional screening path. This allows particles to be screened sequentially on sieves at different angles and levels, and corresponds one-to-one with the discharge direction of the two sets of screening components, forming a four-way diversion grading system that can complete the classification of multiple particle sizes in one go, greatly improving grading efficiency.

[0014] 2. By fixing a T-shaped block inside the storage box and using it in conjunction with a sliding groove, the storage box can slide up and down on the rectangular mounting column, allowing for quick disassembly when cleaning or replacing the storage box, thus improving production efficiency. The support columns with their top surfaces attached to the corners of the storage box, together with the rectangular mounting column, form a stable support structure, which not only enhances the structural strength of the entire device but also effectively disperses vibrations generated during the screening process. The observation window and capacity scale on the outside of the storage box allow operators to observe the amount of particles stored in the box in real time and intuitively. The rectangular limiting post in the middle of the bottom surface of the rectangular screening shell, which cooperates with the limiting groove in the middle of the top surface of the rectangular mounting column, ensures precise positioning of the screening shell during installation. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the entire utility model;

[0016] Figure 2 This is a three-dimensional structural diagram of the particle storage component of this utility model after disassembly;

[0017] Figure 3 This is a three-dimensional structural diagram of the rectangular screening shell of this utility model after the screening and grading components have been removed.

[0018] Figure 4 This is a three-dimensional structural diagram of the disassembled screening and grading component of this utility model.

[0019] In the diagram: 1. Mounting base plate; 101. Rectangular mounting column; 102. Sliding groove; 103. Support column; 104. Limiting groove; 2. Particle storage assembly; 201. Storage box; 202. Feed port; 203. Discharge pipe; 204. Flow valve; 205. T-block; 206. Observation window; 207. Capacity scale; 3. Rectangular screening shell; 301. Feed port; 302. Feed groove; 303. Rectangular limiting column; 4. Screening and grading assembly; 401. Screening side plate; 402. Screening frame; 403. Screening plate; 404. Vibration generator; 405. Barrier plate; 406. Electric telescopic rod. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] like Figures 1 to 4As shown, a pellet screening and grading device for biomass pellet fuel production includes a mounting base plate 1. A rectangular mounting column 101 is vertically arranged in the middle of the mounting base plate 1. Four sets of pellet storage components 2 are arranged on the top four sides of the rectangular mounting column 101. A rectangular screening shell 3 is arranged on the top surface of the rectangular mounting column 101, and its bottom surface is attached to the top surface of the pellet storage components 2. A feed inlet 301 is arranged on the top surface of the rectangular screening shell 3. Two sets of screening and grading components 4 are arranged inside the rectangular screening shell 3. The two sets of screening and grading components 4 are rotated 90 degrees. The discharge point of each set of screening and grading components 4 points to the symmetrical two sides of the rectangular screening shell 3 and corresponds one-to-one with the pellet storage component 2 on the corresponding side.

[0022] like Figure 1 As shown, the main improvement of this utility model lies in solving the problem of particle accumulation and incomplete screening caused by the use of a single sieve layer and a single-direction screening method during particle screening. Figures 1 to 4 As shown, in this utility model, a pellet screening and grading device for biomass pellet fuel production is used. First, a screening plate 403 with a suitable aperture size is selected according to the screening requirements, and then installed on each screening frame 402 in sequence according to the aperture size to complete the preparation work. When screening and grading biomass fuel pellets is required, the pellets are first fed into the rectangular screening shell 3 through the feed inlet 301. The pellets fall onto the first screening plate 403. At this time, the vibration generator 404 on the bottom surface of the screening frame 402 will vibrate the screening plate 403 to ensure that the pellets can pass through the screening plate 403 quickly and accurately. Particles larger than the aperture of the screening plate 403 will slide to the left along the inclination of the screening plate 403. At this time, the baffle plate 405 will be adjusted in position according to actual production needs under the control of the electric telescopic rod 406. This can adjust the residence time and movement trajectory of the pellets on the screening plate 403 and flexibly control the feeding rhythm of pellets of different sizes. Smaller fuel pellets will fall onto the next layer of screening plates 403 and repeat the above screening steps. After the pellets pass through the four screening plates 403 that are staggered, they will fall into their respective feeding troughs 302, completing the screening and grading work. The biomass fuel pellets in the feeding trough 302 will fall into their respective storage boxes 201 through the feeding port 202 for temporary storage. Then, the operator can observe the amount of pellets stored in the storage box 201 in real time and intuitively through the observation window 206 and the capacity scale 207. This helps to keep track of the production progress in a timely manner. By controlling the flow valve 204, the discharge speed of the pellets can be precisely controlled. Combined with the grading rhythm in the screening process, the entire process from screening to storage to discharge is controllable.

[0023] like Figure 1 and Figure 2As shown, the particle storage assembly 2 includes a symmetrical trapezoidal storage box 201 with a side angle of 45 degrees. The storage boxes 201 of the four particle storage assemblies 2 are fitted together. The inner side of the storage box 201 is installed on the side of the rectangular mounting post 101. The top surface of the storage box 201 is provided with a discharge port 202, and the bottom surface of the storage box 201 is provided with a discharge pipe 203. A flow valve 204 is provided inside the discharge pipe 203.

[0024] Specifically, after the biomass fuel pellets have been screened and graded, they will fall into their respective storage boxes 201 through the feeding trough 302 and the feeding port 202 and be temporarily stored in the storage boxes 201. Subsequently, the operator can precisely control the discharge speed of the pellets by controlling the flow valve 204. Combined with the grading rhythm during the screening process, the entire process from screening to storage to discharge is controllable.

[0025] like Figure 3 and Figure 4 As shown, the screening and grading component 4 includes symmetrically arranged screening side plates 401. Two screening frames 402 are staggered vertically between the two screening side plates 401, with the upper screening frame 402 tilted to the left and the lower screening frame 402 tilted to the right. Screening plates 403 are mounted on the screening frames 402, with the aperture on the lower screening plate 403 being smaller than that on the upper screening plate 403. A vibration generator 404 is fixedly connected to the bottom surface of the screening frame 402. A barrier plate 405 is attached to the end of the screening plate 403. The other side of the plate 405 is attached to the inner wall of the rectangular screening housing 3. An electric telescopic rod 406 is provided on the top surface of the barrier plate 405. The fixed end of the electric telescopic rod 406 is connected to the inner wall of the rectangular screening housing 3, and the telescopic end of the electric telescopic rod 406 is connected to the top surface of the barrier plate 405. A feeding trough 302 is provided at each attachment position of the barrier plate 405 on the inner wall of the rectangular screening housing 3. There are four feeding troughs 302 in total, which are connected to the bottom surface of the rectangular screening housing 3 and are respectively connected to the feeding port 202 of the four storage boxes 201.

[0026] Specifically, when biomass fuel pellets need to be screened, the pellets are first fed into the rectangular screening shell 3 through the feed inlet 301. The pellets will fall onto the first screening plate 403. At this time, the vibration generator 404 on the bottom surface of the screening frame 402 will vibrate the screening plate 403 to ensure that the pellets can pass through the screening plate 403 quickly and accurately. Particles larger than the aperture of the screening plate 403 will slide to the left along the inclination of the screening plate 403. At this time, the baffle plate 405 will be adjusted in position according to actual production needs under the control of the electric telescopic rod 406. This can adjust the residence time and movement trajectory of the pellets on the screening plate 403 and flexibly control the feeding rhythm of pellets of different sizes. Smaller fuel pellets will fall onto the next layer of screening plate 403 for the next screening step. After the pellets pass through the four screening plates 403 that are staggered, they will fall into their respective feeding troughs 302 and slide down into the connected storage boxes 201 through the feeding ports 202, thus achieving the screening of biomass fuel pellets.

[0027] like Figure 2 As shown, a T-shaped block 205 is fixedly installed inside the storage box 201. The T-shaped block 205 slides up and down in the middle of the side of the rectangular mounting post 101. The rectangular mounting post 101 has a sliding groove 102 for the T-shaped block 205 to slide.

[0028] Specifically, by fixing a T-shaped block 205 inside the storage box 201, and cooperating with the sliding groove 102 opened on the rectangular mounting column 101, the storage box 201 can be slidably installed up and down on the rectangular mounting column 101. This allows for quick disassembly when cleaning or replacing the storage box 201, greatly reducing the difficulty of equipment maintenance, shortening downtime for maintenance, and improving production efficiency.

[0029] like Figure 1 and Figure 2 As shown, the top surface of the mounting base plate 1 is symmetrically provided with support columns 103 whose top surfaces are attached to the corners of the storage box 201.

[0030] Specifically, by setting a support column 103 on the top surface of the mounting base plate 1, which is attached to the corner of the storage box 201, it will form a stable support structure together with the rectangular mounting column 101. This not only enhances the structural strength of the entire device, but also effectively disperses the vibration generated during the screening process, ensuring that the equipment remains stable during long-term operation.

[0031] like Figure 2 As shown, an observation window 206 is provided in the middle of the outer side of the storage box 201, and a capacity scale 207 is provided on the observation window 206.

[0032] Specifically, by setting an observation window 206 in the middle of the outer side of the storage box 201 and setting a capacity scale 207 on the observation window 206, the operator can observe the storage amount of particles in the storage box 201 in real time and intuitively. This helps to grasp the production progress in a timely manner, rationally arrange subsequent material discharge and storage operations, and avoid over- or under-storage.

[0033] like Figure 2 and Figure 3 As shown, a rectangular limiting post 303 is provided in the middle of the bottom surface of the rectangular screening shell 3, and a limiting groove 104 for placing the rectangular limiting post 303 is provided in the middle of the top surface of the rectangular mounting post 101.

[0034] Specifically, by setting a rectangular limiting post 303 in the middle of the bottom surface of the rectangular screening shell 3, and opening a limiting groove 104 in the middle of the top surface of the rectangular mounting post 101 to place the rectangular limiting post 303, the installation process is simplified, and the relative position between the screening and grading component 4 and the storage box 201 is ensured to be accurate, thus avoiding the impact of installation deviation on the screening and grading effect.

[0035] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A pellet screening and grading device for biomass pellet fuel production, comprising a mounting base plate (1), characterized in that, A rectangular mounting column (101) is vertically arranged in the middle of the mounting base plate (1). Four sets of particle storage components (2) are arranged on the top of the rectangular mounting column (101) on the four sides. A rectangular screening shell (3) with its bottom surface attached to the top surface of the particle storage component (2) is arranged on the top surface of the rectangular mounting column (101). A feed inlet (301) is arranged on the top surface of the rectangular screening shell (3). Two sets of screening and grading components (4) are arranged inside the rectangular screening shell (3). The two sets of screening and grading components (4) are rotated 90 degrees. The discharge point of each set of screening and grading components (4) points to the symmetrical sides of the rectangular screening shell (3) and corresponds one-to-one with the particle storage component (2) on the corresponding side.

2. The pellet screening and grading device for biomass pellet fuel production according to claim 1, characterized in that, The particle storage assembly (2) includes a symmetrical trapezoidal storage box (201) with a side angle of 45 degrees. The storage boxes (201) of the four particle storage assemblies (2) are fitted together. The inner side of the storage box (201) is installed on the side of a rectangular mounting post (101). The top surface of the storage box (201) is provided with a discharge port (202). The bottom surface of the storage box (201) is provided with a discharge pipe (203). A flow valve (204) is provided inside the discharge pipe (203).

3. A pellet screening and grading device for biomass pellet fuel production according to claim 2, characterized in that, The screening and grading component (4) includes symmetrically arranged screening side plates (401). Two screening frames (402) are staggered vertically between the screening side plates (401), with the upper screening frame (402) tilted to the left and the lower screening frame (402) tilted to the right. Screening plates (403) are installed on the screening frames (402), with the aperture of the lower screening plate (403) being smaller than that of the upper screening plate (403). A vibration generator (404) is fixedly connected to the bottom surface of the screening frame (402). A barrier plate (405) is attached to the end of the screening plate (403). 405) The other side is attached to the inner wall of the rectangular screening shell (3). The top surface of the barrier plate (405) is provided with an electric telescopic rod (406). The fixed end of the electric telescopic rod (406) is connected to the inner wall of the rectangular screening shell (3). The telescopic end of the electric telescopic rod (406) is connected to the top surface of the barrier plate (405). The inner wall of the rectangular screening shell (3) is provided with a feeding groove (302) at each attachment position of the barrier plate (405). There are four feeding grooves (302) in total, which are connected to the bottom surface of the rectangular screening shell (3) and are respectively connected to the feeding port (202) of the four storage boxes (201).

4. A pellet screening and grading device for biomass pellet fuel production according to claim 2, characterized in that, A T-shaped block (205) is fixedly installed inside the storage box (201). The T-shaped block (205) slides up and down in the middle of the side of the rectangular mounting post (101). The rectangular mounting post (101) has a sliding groove (102) for the T-shaped block (205) to slide.

5. A pellet screening and grading device for biomass pellet fuel production according to claim 4, characterized in that, The mounting base plate (1) is symmetrically provided with a support column (103) whose top surface is attached to the corner of the storage box (201).

6. A pellet screening and grading device for biomass pellet fuel production according to claim 5, characterized in that, An observation window (206) is provided in the middle of the outer side of the storage box (201), and a capacity scale (207) is provided on the observation window (206).

7. A pellet screening and grading device for biomass pellet fuel production according to claim 3, characterized in that, The rectangular screening shell (3) has a rectangular limiting post (303) in the middle of its bottom surface, and a limiting groove (104) for placing the rectangular limiting post (303) is opened in the middle of the top surface of the rectangular mounting post (101).

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