Impurity screening equipment special for biomass pellet fuel

Abstract

The utility model discloses impurity screening equipment special for biomass pellet fuel, and relates to the technical field of biomass pellet fuel processing. The impurity screening equipment special for the biomass pellet fuel comprises a screening box body, a first-stage filtering sieve plate, a second-stage filtering sieve plate and a suction system, the screening box body is in a hollow box body shape with openings in the left end and the right end, the opening in the left end of the screening box body is a biomass raw material inlet, and the right side of the screening box body is a biomass raw material outlet; the first-stage filtering sieve plate is located on the left side of the second-stage filtering sieve plate, the first-stage filtering sieve plate and the second-stage filtering sieve plate are each in an inclined shape with the left higher than the right, and the right end of the first-stage filtering sieve plate is located on the upper side of the left end of the second-stage filtering sieve plate. And the suction system is arranged, the suction system sucks air in the screening box body from the upper portion, so that tiny particles such as dust in the suction system are sucked out, the dust is filtered out through the filtering effect, and the situation that the dust in the screening box body overflows and harms surrounding workers is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of biomass pellet fuel processing, and particularly relates to a special impurity screening device for biomass pellet fuel. Background Technique

[0002] Biomass pellets are cold-state densification formed by using pressure rollers and ring dies to process crushed biomass straw, forestry waste and other raw materials under normal temperature conditions. The density of the raw materials is generally 0.1 - 0.13t / m3, and the density of the formed pellets is 1.1 - 1.3t / m3, which is convenient for storage and transportation, and greatly improves the combustion performance of biomass.

[0003] In the production process of biomass pellet fuel, the raw materials often contain various impurities, such as soil, metal fragments, etc. These impurities not only affect the quality of the fuel, but may also damage the hot pressing forming equipment. The existing screening devices usually use methods such as mesh screening or air separation to remove impurities. Although these methods are simple, some devices may generate a large amount of dust during the screening process, which affects the health of operators and the environment. Content of the Utility Model

[0004] (1) Technical Problems to be Solved

[0005] In view of the deficiencies of the prior art, the utility model provides a special impurity screening device for biomass pellet fuel, which solves the problem that a large amount of dust may be generated during the screening process, affecting the health of operators and the environment.

[0006] (2) Technical Solutions

[0007] To achieve the above object, the utility model is realized through the following technical solutions: A special impurity screening device for biomass pellet fuel, comprising:

[0008] A screening box body, which is a hollow box body with openings at both the left and right ends. The left end opening of the screening box body is the biomass raw material inlet, and the right side is the biomass raw material outlet;

[0009] A primary filter screen plate and a secondary filter screen plate. The primary filter screen plate is located on the left side of the secondary filter screen plate. Both the primary filter screen plate and the secondary filter screen plate are inclined with the left end higher than the right end, and the right end of the primary filter screen plate is located above the left end of the secondary filter screen plate. Both the primary filter screen plate and the secondary filter screen plate are located inside the screening box body. The left end of the primary filter screen plate is located at the biomass raw material inlet, and the right end of the secondary filter screen plate is located at the biomass raw material outlet. Filter screen holes are opened on both the primary filter screen plate and the secondary filter screen plate, and the filter screen holes on the primary filter screen plate are smaller than the filter screen holes on the secondary filter screen plate;

[0010] A suction system is provided on the upper side of the screening box body.

[0011] Preferably, both the primary filter sieve plate and the secondary filter sieve plate include an upper sieve plate and a lower sieve plate movably connected to the lower side of the upper sieve plate. The filter sieve holes are provided at corresponding positions on the upper sieve plate and the lower sieve plate. Tightening screws are screwed on the upper sieve plate, and the lower ends of the tightening screws support on the upper surface of the lower sieve plate.

[0012] Preferably, both the left ends of the primary filter sieve plate and the secondary filter sieve plate are connected with support shafts. The two ends of the support shafts are rotatably connected to the inner wall of the screening box body, and the right ends of the primary filter sieve plate and the secondary filter sieve plate are elastically connected to the inner wall of the screening box body.

[0013] Preferably, a support block is provided on the inner wall of the screening box body, and a support spring is provided on the upper part of the support block. The upper end of the support spring is connected to the upper sieve plate.

[0014] Preferably, vibration mechanisms are installed on the lower surfaces of both the primary filter sieve plate and the secondary filter sieve plate.

[0015] Preferably, a first discharge port and a second discharge port are provided on the lower side of the front wall of the screening box body. The first discharge port and the second discharge port are respectively located on the lower sides of the primary filter sieve plate and the secondary filter sieve plate, and a partition strip is provided between the primary filter sieve plate and the secondary filter sieve plate.

[0016] Preferably, the inside of the screening box body is in an inclined shape with the front lower and the rear higher.

[0017] Preferably, the suction system includes a suction pipe connected to the upper surface of the screening box body. The upper end of the suction pipe is connected to a centralized pipe. One end of the centralized pipe is connected to the suction port of a suction fan, and a filter screen is provided between the centralized pipe and the suction port of the suction fan.

[0018] Preferably, a feed guiding plate is provided on the left side at the biomass raw material inlet of the screening box body.

[0019] (III) Beneficial effects

[0020] The present utility model provides a special impurity screening device for biomass pellet fuel. Compared with the prior art, it has at least the following beneficial effects:

[0021] A suction system is provided. The suction system sucks the internal air of the screening box body from the upper part, so that fine particles such as dust inside the suction system are sucked out. Through the filtering effect, the dust is filtered down, avoiding the overflow of dust in the screening box body and causing harm to the surrounding staff.

[0022] By using the cooperation between the primary filtration sieve plate and the secondary filtration sieve plate, it is possible to filter two different sizes of particles, thus facilitating the separation of different-sized microparticles. Brief Description of the Drawings

[0023] Figure 1 It is a schematic structural diagram of the present utility model;

[0024] Figure 2 It is a schematic diagram of the internal structure of the screening box body of the present utility model;

[0025] Figure 3 For the present utility model Figure 2 An enlarged schematic diagram of part A in it.

[0026] In the figure: 1. Screening box body; 2. Feed guiding plate; 3. Suction pipe; 4. Concentrating pipe; 5. Suction fan; 6. First discharge port; 7. Second discharge port; 8. Primary filtration sieve plate; 9. Support shaft; 10. Secondary filtration sieve plate; 11. Upper sieve plate; 12. Lower sieve plate; 13. Fastening screw; 14. Support block; 15. Support spring; 16. Filter sieve hole. Detailed Embodiment

[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0028] Embodiment 1:

[0029] Please refer to Figures 1 - 3 , the present utility model provides a technical solution: a screening device for screening special impurities of biomass pellet fuel, including: screening box body 1, primary filtration sieve plate 8, secondary filtration sieve plate 10, and suction system;

[0030] The screening box body 1 is in the shape of a box that is hollow and open at both the left and right ends. The left end opening of the screening box body 1 is the biomass raw material inlet, and the right side is the biomass raw material outlet. The primary filtration sieve plate 8 is located on the left side of the secondary filtration sieve plate 10. Both the primary filtration sieve plate 8 and the secondary filtration sieve plate 10 are inclined with the left end higher than the right end, and the right end of the primary filtration sieve plate 8 is located above the left end of the secondary filtration sieve plate 10. Both the primary filtration sieve plate 8 and the secondary filtration sieve plate 10 are located inside the screening box body 1, and the left end of the primary filtration sieve plate 8 is located at the biomass raw material inlet. The right end of the secondary filtration sieve plate 10 is located at the biomass raw material outlet. Filtering sieve holes 16 are provided on both the primary filtration sieve plate 8 and the secondary filtration sieve plate 10. The filtering sieve holes 16 on the primary filtration sieve plate 8 are smaller than the filtering sieve holes 16 on the secondary filtration sieve plate 10. The suction system is arranged on the upper side of the screening box body 1.

[0031] Analysis of the above content: During use, biomass particles are placed at the biomass raw material inlet, and the biomass particles roll to the right. It is set that the size of the biomass particles is larger than the size of the filtering sieve holes 16. After being filtered through the filtering sieve holes 16, the smaller impurities fall to the lower side of the primary filtration sieve plate 8, and the larger impurities fall to the lower side of the secondary filtration sieve plate 10. Then the biomass particles are output to the right from the biomass raw material outlet, and the biomass particles output at this time are relatively pure.

[0032] During the separation process, the suction system is in a working state and can suck the floating dust in the screening box body 1. The impurities that fall to the lower sides of the primary filtration sieve plate 8 and the secondary filtration sieve plate 10 are generally not affected by the suction.

[0033] Embodiment 2:

[0034] Please refer to Figures 1 - 3 , the present utility model provides a technical solution based on Embodiment 1: Both the primary filtration sieve plate 8 and the secondary filtration sieve plate 10 include an upper sieve plate 11 and a lower sieve plate 12 movably connected to the lower side of the upper sieve plate 11. The filtering sieve holes 16 are opened at the corresponding positions of the upper sieve plate 11 and the lower sieve plate 12. A fastening screw 13 is screwed on the upper sieve plate 11, and the lower end of the fastening screw 13 supports on the upper surface of the lower sieve plate 12. Both the left ends of the primary filtration sieve plate 8 and the secondary filtration sieve plate 10 are connected with support shafts 9, and both ends of the support shafts 9 are rotatably connected to the inner wall of the screening box body 1. The right ends of the primary filtration sieve plate 8 and the secondary filtration sieve plate 10 are elastically connected to the inner wall of the screening box body 1. A support block 14 is arranged on the inner wall of the screening box body 1, a support spring 15 is arranged on the upper part of the support block 14, and the upper end of the support spring 15 is connected to the upper sieve plate 11. Vibration mechanisms are installed on the lower surfaces of both the primary filtration sieve plate 8 and the secondary filtration sieve plate 10.

[0035] Analysis of the above content: The upper sieve plate 11 and the lower sieve plate 12 can move relative to each other, so that the intersection area between the filtering sieve holes 16 of the upper sieve plate 11 and the lower sieve plate 12 changes, thereby adjusting the effective hole size of the filtering sieve holes 16 to be suitable for different filtering situations. After adjustment, tighten the fastening screw 13 to fasten the connection between the upper sieve plate 11 and the lower sieve plate 12. The left ends of the first-stage filtering sieve plate 8 and the second-stage filtering sieve plate 10 are rotatably connected to the inner wall of the screening box 1 through the support shaft 9, and the right sides of the first-stage filtering sieve plate 8 and the second-stage filtering sieve plate 10 are supported on the support block 14 through the support spring 15. In cooperation with the use of the vibration mechanism, the first-stage filtering sieve plate 8 and the second-stage filtering sieve plate 10 swing, promoting the shaking and dispersion of biomass particles and facilitating the separation of impurities. The vibration mechanism adopts the existing technology. For example, it includes a driving motor and an eccentric block installed on the output shaft of the driving motor. The driving motor is installed on the lower side of the first-stage filtering sieve plate 8 and the second-stage filtering sieve plate 10. The driving motor drives the eccentric block to rotate. Due to the unbalanced rotation of the eccentric block, the first-stage filtering sieve plate 8 and the second-stage filtering sieve plate 10 vibrate as a whole.

[0036] Embodiment Three:

[0037] Please refer to Figures 1 - 3 , based on Embodiment One, the present utility model provides a technical solution: A discharge port one 6 and a discharge port two 7 are provided on the lower side of the front wall of the screening box 1. The discharge port one 6 and the discharge port two 7 are respectively located on the lower sides of the first-stage filtering sieve plate 8 and the second-stage filtering sieve plate 10, and a partition bar is provided between the first-stage filtering sieve plate 8 and the second-stage filtering sieve plate 10. The inside of the screening box 1 is in an inclined shape with the front lower and the rear higher.

[0038] Analysis of the above content: Impurities with smaller sizes and impurities with larger sizes are discharged from the discharge port one 6 and the discharge port two 7 respectively.

[0039] Embodiment Four:

[0040] Please refer to Figures 1 - 3 , based on Embodiment One, the present utility model provides a technical solution: The suction system includes a suction pipe 3 connected to the upper surface of the screening box 1. The upper end of the suction pipe 3 is connected to a centralized pipe 4. One end of the centralized pipe 4 is connected to the suction port of a suction fan 5, and a filter screen is provided between the centralized pipe 4 and the suction port of the suction fan 5.

[0041] Analysis of the above content: The suction fan 5 sucks the air inside the screening box 1 out through the suction pipe 3 and the centralized pipe 4. The air carries dust particles and is sucked out, and is filtered through the filter screen. Just clean the filter screen regularly.

[0042] Embodiment Five:

[0043] Please refer to Figures 1 - 3, the present utility model provides a technical solution based on Embodiment 1: A feed guiding plate 2 is provided on the left side of the biomass raw material inlet of the screening box body 1.

[0044] Analysis of the above content: Through the setting of the feed guiding plate 2, it is convenient to put the materials.

[0045] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0046] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A special impurity screening device for biomass pellet fuel, characterized in that: include: A screening box (1), wherein the screening box (1) is in the shape of a hollow box with left and right ends opened, the left end opening of the screening box (1) being an inlet for biomass raw materials, and the right end opening being an outlet for biomass raw materials; A primary filter sieve plate (8) and a secondary filter sieve plate (10), wherein the primary filter sieve plate (8) is located on the left side of the secondary filter sieve plate (10), the primary filter sieve plate (8) and the secondary filter sieve plate (10) are both inclined with the left side higher than the right side, and the right end of the primary filter sieve plate (8) is located above the left end of the secondary filter sieve plate (10), the primary filter sieve plate (8) and the secondary filter sieve plate (10) are both located in a screening box (1), and the left end of the primary filter sieve plate (8) is located at the inlet of the biomass raw material, and the right end of the secondary filter sieve plate (10) is located at the outlet of the biomass raw material, and the primary filter sieve plate (8) and the secondary filter sieve plate (10) are both provided with filter sieve holes (16), and the filter sieve holes (16) on the primary filter sieve plate (8) are smaller than the filter sieve holes (16) on the secondary filter sieve plate (10); A suction system is arranged on the upper side of the screening box (1).

2. The impurity screening device for biomass pellet fuel according to claim 1, characterized in that: The primary filter screen plate (8) and the secondary filter screen plate (10) both comprise an upper screen plate (11) and a lower screen plate (12) movably connected to the lower side of the upper screen plate (11); the filter screen holes (16) are provided at corresponding positions of the upper screen plate (11) and the lower screen plate (12); a fastening screw (13) is screwed onto the upper screen plate (11); and the lower end of the fastening screw (13) is supported on the upper surface of the lower screen plate (12).

3. The impurity screening device for biomass pellet fuel according to claim 2 is characterized in that: The left ends of the primary filter screen plate (8) and the secondary filter screen plate (10) are both connected to a support shaft (9), both ends of the support shaft (9) are rotatably connected to the inner wall of the screening box (1), and the right ends of the primary filter screen plate (8) and the secondary filter screen plate (10) are elastically connected to the inner wall of the screening box (1).

4. The impurity screening device for biomass pellet fuel according to claim 3 is characterized by: The inner wall of the screening box (1) is provided with a support block (14), the upper part of the support block (14) is provided with a support spring (15), and the upper end of the support spring (15) is connected to the upper screen plate (11).

5. The impurity screening device for biomass pellet fuel according to claim 4 is characterized in that: The lower surfaces of the primary filter screen plate (8) and the secondary filter screen plate (10) are both equipped with a vibration mechanism.

6. The impurity screening device for biomass pellet fuel according to claim 1, characterized in that: A discharge port 1 (6) and a discharge port 2 (7) are provided on the lower side of the front wall of the screening box (1); the discharge port 1 (6) and the discharge port 2 (7) are respectively located on the lower side of the primary filter sieve plate (8) and the secondary filter sieve plate (10); and a baffle strip is provided between the primary filter sieve plate (8) and the secondary filter sieve plate (10).

7. The impurity screening device for biomass pellet fuel according to claim 6, characterized in that: The interior of the screening box (1) is in an inclined shape with the front lower and the rear higher.

8. The impurity screening device for biomass pellet fuel according to claim 1, characterized in that: The suction system comprises a suction pipe (3) connected to the upper surface of the screening box (1), the upper end of the suction pipe (3) is connected to a central pipe (4), one end of the central pipe (4) is connected to a suction port of a suction fan (5), and a filter is provided between the central pipe (4) and the suction port of the suction fan (5).

9. The impurity screening device for biomass pellet fuel according to claim 1, characterized in that: A feed guide plate (2) is arranged on the left side of the biomass raw material inlet of the screening box (1).

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