Biomass particle extrusion forming and discharging mechanism

Abstract

The utility model discloses a biomass particle extrusion forming and discharging mechanism which comprises a shell, a compression roller, a ring die, a rotary disc and a scraper knife, a conical disc is movably sleeved outside the ring die, the scraper knife is fixedly connected to the upper surface of the conical disc, a sealing brush strip is fixed on the inner side wall of the shell along the circumference, and a discharging hopper is arranged on the edge of the shell along the tangential direction. The discharging hopper is fixedly connected with a fixing frame, and the bottom of the fixing frame is fixedly connected with a discharging brush making contact with the upper surface of the rotary disc. Biomass particles are cut off through the cutter in inclined contact with the circular mold, powder generated on a fracture surface is reduced, the conical disc and the sealing brush strip enable the cut-off biomass particles not to be extruded, collided and rubbed with the circular mold and the shell which are high in hardness, meanwhile, the biomass particles on the rotary disc are swept and cleaned through the discharging brush, and discharging is completed. And secondary crushing generated by the biomass particles in the discharging process is reduced, the powder granulation ratio is increased, and the biomass particle yield is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of vertical ring die pelletizers, in particular to a biomass particle extrusion molding and discharging mechanism. Background Art

[0002] Biomass pellet fuel is a granular environmental protection new energy fuel produced by processing forestry and agricultural wastes such as trees, straws, and rice husks through pelletizers. Due to its many advantages such as high calorific value, low pollution, sanitation, and less ash residue, it is highly favored by users.

[0003] Biomass pellets are processed from biomass powder raw materials. During the processing, cutting, granulating, and discharging of biomass pellets by a vertical ring die pelletizer, the biomass pellets will have a high secondary pulverization rate due to fracture and friction and collision with the shell of the vertical ring die pelletizer, resulting in a large amount of powder in the fuel pellets and affecting the combustion performance of the biomass pellet fuel. Content of the Utility Model

[0004] Aiming at the deficiencies of the existing technology, the utility model provides a biomass particle extrusion molding and discharging mechanism, which is used to solve the problem that biomass particles are prone to secondary pulverization during the discharging process of the existing vertical ring die pelletizer.

[0005] To solve the above technical problems, the utility model provides the following technical solutions:

[0006] A biomass particle extrusion molding and discharging mechanism includes a shell, a pressure roller, a ring die, a turntable, and a shovel knife. The ring die is installed in the center of the interior of the shell. The pressure roller and the turntable are respectively rotatably installed inside and outside the ring die, and the turntable is rotatably installed inside the shell. A conical disk is movably sleeved outside the ring die. The conical disk is fixedly connected to the upper surface of the turntable. The shovel knife is fixedly connected to the upper surface of the conical disk;

[0007] Sealing brush strips are fixed along the circumference on the inner side wall of the shell. The bristles of the sealing brush strips are arranged along the rotation direction of the turntable. A discharge hopper is arranged along the tangential direction at the edge of the shell, and a notch is arranged at the position of the shell corresponding to the discharge hopper. A fixed frame is fixedly connected to the discharge hopper, and a discharge brush in contact with the upper surface of the turntable is fixedly connected to the bottom of the fixed frame.

[0008] Preferably, the outer wall slope of the conical disk is not less than 15°.

[0009] Preferably, one side edge of the shovel knife is in contact with the outer wall of the ring die, and the included angle between the shovel knife and the corresponding position of the outer wall of the ring die does not exceed 45°.

[0010] Preferably, the sealing brush strips are fixedly connected to the position on the inner side wall of the shell close to the bottom, and the bristles of the sealing brush strips are in contact with the upper surface of the turntable.

[0011] Preferably, the discharging brush is arranged against the rotation direction of the turntable, and the bristles at the end of the discharging brush away from the fixing frame extend to the surface of the conical disk.

[0012] Preferably, there are at least two discharging brushes.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The biomass particles are cut by the cutting knife in inclined contact with the ring die in the utility model. Compared with the direct extrusion granulation method in the prior art, the powder generated from the fracture surface is reduced. The conical disk and the sealing brush strip prevent the cut biomass particles from being extruded, collided and rubbed against the relatively hard ring die and the outer shell. At the same time, the biomass particles on the turntable are swept and cleaned by the discharging brush to complete the discharging, replacing the direct pushing and discharging by the relatively hard metal shovel plate in the prior art, reducing the secondary crushing of the biomass particles during the discharging process, improving the powder granulation ratio, and increasing the yield of the biomass particles. Description of the Drawings

[0015] Figure 1 It is the top view of the overall structure of the utility model;

[0016] Figure 2 It is the enlarged partial structure view at the corresponding position of the shovel knife and the sealing brush strip of the utility model;

[0017] Figure 3 It is the side view of the discharging brush of the utility model;

[0018] Figure 4 It is the side sectional view of the turntable and the conical disk of the utility model.

[0019] In the figure: 1. Outer shell; 2. Press roller; 3. Ring die; 4. Turntable; 5. Shovel knife; 6. Conical disk; 7. Sealing brush strip; 8. Discharge hopper; 9. Fixing frame; 10. Discharging brush. Detailed Embodiment

[0020] Next, the technical solutions in the embodiments of the utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the 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 utility model.

[0021] Such as Figures 1-4As shown in the figure, the present utility model provides a technical solution: a biomass pellet extrusion and forming discharging mechanism, which includes a housing 1, a pressing roller 2, a ring die 3, a turntable 4 and a shovel knife 5. The ring die 3 is installed at the center inside the housing 1. The pressing roller 2 and the turntable 4 are respectively rotatably installed inside and outside the ring die 3, and the turntable 4 is rotatably installed inside the housing 1. A conical disk 6 is movably sleeved outside the ring die 3. The conical disk 6 is fixedly connected to the upper surface of the turntable 4. The outer wall slope of the conical disk 6 is not less than 15°, which facilitates the biomass pellets cut by the shovel knife 5 to roll from the conical disk 6 onto the turntable 4;

[0022] The shovel knife 5 is fixedly connected to the upper surface of the conical disk 6. One side edge of the shovel knife 5 is in contact with the outer wall of the ring die 3, and the included angle between the shovel knife 5 and the corresponding position of the outer wall of the ring die 3 does not exceed 45°, so that the biomass pellets are cut by the shovel knife 5 rather than broken, reducing the generation of fines of the biomass pellets;

[0023] Sealing brush strips 7 are fixedly arranged along the circumference on the inner side wall of the housing 1. The bristles of the sealing brush strips 7 are arranged along the rotation direction of the turntable 4. The sealing brush strips 7 are fixedly connected to the position on the inner side wall of the housing 1 close to the bottom, and the bristles of the sealing brush strips 7 are in contact with the upper surface of the turntable 4, preventing the biomass pellets on the turntable 4 from contacting the inner wall of the housing 1 and preventing the biomass pellets from rubbing against the housing 1 to generate fines when the turntable 4 rotates;

[0024] A discharge hopper 8 is arranged along the tangent direction at the edge of the housing 1, and a notch is arranged at the position of the housing 1 corresponding to the discharge hopper 8. A fixing frame 9 is fixedly connected to the discharge hopper 8. A discharge brush 10 in contact with the upper surface of the turntable 4 is fixedly connected to the bottom of the fixing frame 9. There are at least two discharge brushes 10 to prevent one discharge brush 10 from being unable to completely clean the biomass pellets on the turntable 4;

[0025] The discharge brush 10 is arranged against the rotation direction of the turntable 4, and the bristles at the end of the discharge brush 10 away from the fixing frame 9 extend to the surface of the conical disk 6. The turntable 4 rotates while the discharge brush 10 is fixed, which facilitates cleaning and sweeping the biomass pellets on the turntable 4 into the discharge hopper 8.

[0026] Working principle:

[0027] The pressing roller 2 is driven by the vertical ring die granulator to rotate clockwise in the ring die 3 for granulation through the die holes of the ring die 3. The turntable 4 is driven by the vertical ring die granulator to rotate clockwise. The turntable 4 drives the conical disk 6 and the scraper 5 to rotate clockwise together. The scraper 5 cuts off the biomass particles and makes them roll from the conical disk 6 onto the turntable 4. The sealing brush strip 7 prevents the biomass particles on the turntable 4 from contacting the inner wall of the housing 1, causing extrusion, friction, and collision debris. The turntable 4 rotates and the discharging brush 10 is fixed. The discharging brush 10 sweeps the biomass particles on the turntable 4 from the turntable 4 into the discharging hopper 8 to complete discharging. During the whole process, the biomass particles are prevented from being extruded, rubbed, and collided with the harder ring die 3 and the housing 1, reducing the secondary pulverization of the biomass particles during the discharging process.

[0028] It should be noted that in this article, terms such as "including", "comprising", or any other variants thereof are 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 explicitly listed, or elements inherent to such a process, method, article, or device.

[0029] Although the embodiments of the present invention 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 invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A biomass pellet extrusion and forming discharging mechanism, comprising a housing (1), a pressure roller (2), a ring die (3), a turntable (4) and a scraper (5). The ring die (3) is installed at the center inside the housing (1). The pressure roller (2) and the turntable (4) are respectively rotatably installed inside and outside the ring die (3), and the turntable (4) is rotatably installed inside the housing (1), characterized in that: The outer part of the ring die (3) is sleeved with a tapered disk (6) in an active manner. The tapered disk (6) is fixedly connected to the upper surface of the turntable (4), and the scraper (5) is fixedly connected to the upper surface of the tapered disk (6). Sealing brush strips (7) are fixedly arranged along the circumference on the inner side wall of the outer shell (1). The bristles of the sealing brush strips (7) are arranged along the rotation direction of the turntable (4). A discharge hopper (8) is arranged along the tangential direction at the edge of the outer shell (1), and a notch is arranged at the position of the outer shell (1) corresponding to the discharge hopper (8). A fixing frame (9) is fixedly connected to the discharge hopper (8), and a discharge brush (10) in contact with the upper surface of the turntable (4) is fixedly connected to the bottom of the fixing frame (9).

2. The biomass pellet extrusion and forming discharging mechanism according to claim 1, wherein: The slope of the outer wall of the tapered disk (6) is not less than 15°.

3. A biomass pellet extrusion and forming discharging mechanism according to claim 1, wherein: One side edge of the scraper (5) is in contact with the outer wall of the ring die (3), and the included angle between the scraper (5) and the corresponding position of the outer wall of the ring die (3) does not exceed 45°.

4. A biomass pellet extrusion and forming discharge mechanism according to claim 1, characterized in that: The sealing brush strips (7) are fixedly connected to the position near the bottom of the inner side wall of the outer shell (1), and the bristles of the sealing brush strips (7) are in contact with the upper surface of the turntable (4).

5. A biomass pellet extrusion and forming discharging mechanism according to claim 1, characterized in that: The discharge brush (10) is arranged against the rotation direction of the turntable (4), and the bristles at one end of the discharge brush (10) away from the fixing frame (9) extend to the surface of the tapered disk (6).

6. The biomass pellet extrusion and forming discharging mechanism according to claim 1, wherein: There are at least two discharge brushes (10).

Images