Biomass particle selector

Abstract

The invention is suitable for the technical field of biomass particle selection, and provides a biomass particle selection machine which comprises a base plate and a vertical plate arranged on the base plate. The grading and selecting mechanism comprises a multi-station selecting frame, a first rotating pipe and a second rotating pipe, a cylindrical discharging cavity is formed in the multi-station selecting frame, a plurality of screening cavities are formed in the edge of the multi-station selecting frame, a discharging assembly is arranged in one screening cavity, and selecting assemblies are arranged in the other screening cavities; the control assembly is used for adjusting the working states of the selecting assembly and the discharging assembly; and the multifunctional driving mechanism is used for driving the rotating pipe I to intermittently rotate. According to the biomass particle sorting machine disclosed by the invention, through cooperative arrangement of the grading sorting mechanism, the control assembly and the multifunctional driving mechanism, the problems that most of existing biomass particle sorting machines are simple in screening structure, grading sorting cannot be well realized, and the production quality of biomass particles is influenced are solved.

Description

Technical Field

[0001] The invention relates to the technical field of biomass particle selection, in particular to a biomass particle selection machine. Background Art

[0002] As the world's attention and demand for renewable energy continue to grow, biomass energy, as an important source of clean energy, is increasingly widely used. Biomass pellets, as a common form of biomass energy, are made from biomass raw materials such as agricultural and forestry waste through a compression molding process. However, in the production process of biomass pellets, due to factors such as the diversity of raw materials, the limitations of processing technology, and the instability of equipment operation, the quality of the produced biomass pellets varies. These quality problems are mainly reflected in many aspects. On the one hand, biomass pellets may have a large size deviation. Particles that are too large or too small will cause inconvenience in the subsequent storage, transportation, and combustion utilization, such as affecting the space utilization of storage containers, failing to achieve the best combustion effect in combustion equipment, and leading to reduced energy utilization. On the other hand, there may be uneven density inside the particles, which will make the combustion rate of the particles unstable during combustion, prone to incomplete combustion, and then emit more pollutants, have a negative impact on the environment, and also reduce the economic value of biomass energy.

[0003] Most of the existing biomass pellet sorting machines have simple screening structures and cannot achieve good classification and sorting, which affects the production quality of biomass pellets. Therefore, in view of the above situation, it is urgent to provide a biomass pellet sorting machine to overcome the shortcomings in current practical applications. Summary of the invention

[0004] The object of the present invention is to provide a biomass particle sorting machine, aiming to solve the problems in the above-mentioned background technology.

[0005] The present invention is implemented in this way: a biomass particle sorting machine comprises: A base plate and vertical plates arranged on the base plate, wherein two groups of vertical plates are symmetrically arranged on the base plate; A grading and selecting mechanism, the grading and selecting mechanism comprises a multi-station selecting frame, a rotating tube 1 and a rotating tube 2, the rotating tube 1 and the rotating tube 2 are respectively rotatably mounted on two sets of vertical plates, the multi-station selecting frame is fixedly mounted between the rotating tube 1 and the rotating tube 2, the multi-station selecting frame has a cylindrical discharge cavity inside, a plurality of screening cavities are arranged at the edge of the multi-station selecting frame, a discharge assembly is arranged in one of the screening cavities, and the other screening cavities are all arranged with selecting assemblies; A feed pipe connected to the second rotating pipe, wherein the feed pipe is fixedly mounted on the vertical plate through an L-shaped plate, and the feed pipe is rotatably connected to the second rotating pipe; A control component for adjusting the working state of the selection component and the discharge component; And a multifunctional driving mechanism for driving the rotating tube to rotate intermittently.

[0006] As a further solution of the present invention: the selection component comprises: A screening plate for screening the material in the discharge cavity, wherein the screening plate is arranged on the multi-station selection frame, and the screening plate is located between the discharge cavity and the screening cavity; An elastic traction component is located in the screening cavity, and a blocking cover plate for blocking the screening cavity is connected to the elastic traction component.

[0007] As a further solution of the present invention: the elastic traction assembly comprises: Compression boxes, two of which are symmetrically arranged in the screening chamber, and a piston plate is slidably installed in each compression box; A push rod is fixedly mounted on the piston plate, one end of the push rod away from the piston plate is fixedly connected to the blocking cover plate, and a through hole slidably connected to the push rod is opened on the compression box; A second spring is used for elastically pressing the piston plate, and the second spring is sleeved on the push rod.

[0008] As a further solution of the present invention: the sieve plate has an air guide cavity, and the filter holes of the sieve plate are provided with spray holes connected to the air guide cavity, the sieve plate is provided with air guide holes connected to the air guide cavity, and the compression box is also provided with an air guide pipe, and the air guide pipe is connected to the air guide hole.

[0009] As a further solution of the present invention: the filter hole size of the sieve plates in at least one group of the selection components is different from the filter hole size of the sieve plates in other selection components.

[0010] As a further solution of the present invention: the discharge assembly comprises: An inner sealing plate, which is used to seal the discharge cavity and one of the screening cavities; Elastic telescopic rods, wherein a plurality of groups of elastic telescopic rods are fixedly installed in the screening chamber; And a discharge plate, wherein the discharge plate is fixedly mounted on the elastic telescopic rod, and the discharge plate is fixedly connected to the inner blocking plate.

[0011] As a further solution of the present invention: the control component includes: An L-shaped frame, wherein the L-shaped frame is fixedly mounted on the base plate, and a rack is also slidably mounted on the L-shaped frame; A spring 1 for elastically supporting the rack, wherein the spring 1 is arranged on the L-shaped frame; A translation plate fixedly mounted on the rack, wherein the translation plate is provided with a second electromagnet; And adsorption patches fixedly installed on the blocking cover plate and the unloading plate.

[0012] As a further solution of the present invention: the control component also includes a telescopic cylinder arranged on the vertical plate, a lifting plate is fixedly installed on the telescopic end of the telescopic cylinder, and an electromagnet is arranged on the lifting plate.

[0013] As a further solution of the present invention: the multifunctional driving mechanism comprises: A support shaft, the support shaft is rotatably mounted in the rotating tube, and a driven gear is fixedly mounted on the support shaft; A driven plate, the driven plate is fixedly mounted on the rotating tube, and a plurality of arc grooves and strip holes are respectively opened at the edge of the driven plate, and the arc grooves and strip holes are arranged at intervals from each other; A rotating shaft, the rotating shaft is rotatably mounted on the vertical plate, and a driving handle, a transmission gear and an incomplete gear are respectively fixedly mounted on the rotating shaft, wherein the transmission gear is meshed with the driven gear, and the incomplete gear is intermittently meshed with the rack, one end of the driving handle has a fan-shaped protrusion used in conjunction with the arc groove, and the other end of the driving handle is rotatably mounted with a driving column used in conjunction with the strip groove; And a motor is fixedly mounted on the vertical plate, and a driving gear meshing with the transmission gear is fixedly mounted on the output shaft of the motor.

[0014] As a further solution of the present invention: the support shaft is further provided with a plurality of groups of spoilers for stirring the material in the discharge cavity.

[0015] Compared with the prior art, the invention has the following beneficial effects: the material can be conveniently introduced into the discharge cavity of the multi-station selection frame through the rotating pipe 2 by using the feed pipe, the multi-function driving component can drive the rotating pipe 1 to rotate intermittently, the rotating pipe 1 can drive the multi-station selection frame to rotate synchronously, and the material can be selected in cooperation with the selecting component, the setting of multiple groups of selecting components can realize multi-level selection of materials, the control component can control the working state of the selecting component and the discharging component, the selected material entering the screening cavity can be discharged, and the discharging component can discharge the material that has not been selected and is finally left in the discharge cavity, which is convenient and quick; The present invention avoids the problem that most existing biomass particle sorting machines have simple screening structures, cannot achieve good grading and sorting, and affect the production quality of biomass particles through the coordinated arrangement of the grading and sorting mechanism, the control component and the multifunctional driving mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention.

[0017] Figure 2 for Figure 1Schematic diagram of the rear view structure.

[0018] Figure 3 It is a structural schematic diagram of the multi-stage selection mechanism in the present invention.

[0019] Figure 4 for Figure 3 Schematic diagram of the internal structure.

[0020] Figure 5 This is a schematic diagram of the multi-station selection framework structure in the present invention.

[0021] Figure 6 It is a schematic cross-sectional structural diagram of the compression box in the present invention.

[0022] Figure 7 It is a schematic diagram of the structure of the screening plate in the present invention.

[0023] Figure 8 for Figure 7 Schematic diagram of the enlarged structure at point A in the middle.

[0024] Fig. 9 It is a structural schematic diagram of the multifunctional driving mechanism in the present invention.

[0025] In the attached figure: 1-base plate, 2-vertical plate, 3-material guide plate, 4-translation plate, 5-adsorption patch, 6-blocking cover plate, 7-multi-station selection frame, 8-rotating tube 1, 9-feeding tube, 10-driven plate, 11-rack, 12-L-shaped frame, 13-telescopic cylinder, 14-lifting plate, 15-electromagnet 1, 16-spring 1, 17-support shaft, 18-electromagnet 2, 19-unloading plate, 20-rotating tube Two, 21-compression box, 22-push rod, 23-screening plate, 24-inner blocking plate, 25-elastic telescopic rod, 26-spoiler, 27-air guide tube, 28-spring two, 29-piston plate, 30-air guide hole, 31-spray hole, 32-driven gear, 33-transmission gear, 34-incomplete gear, 35-rotating shaft, 36-driving handle, 37-driving column, 38-driving gear, 39-motor. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. The specific implementation of the present invention is described in detail below in combination with specific embodiments.

[0027] See also Figure 1-Figure 9 , an embodiment of the present invention provides a biomass particle sorting machine, the biomass particle sorting machine comprising: A base plate 1 and a vertical plate 2 arranged on the base plate 1, wherein two groups of the vertical plates 2 are symmetrically arranged on the base plate 1; A grading and selecting mechanism, the grading and selecting mechanism comprises a multi-station selecting frame 7, a rotating tube 1 8 and a rotating tube 2 20, the rotating tube 1 8 and the rotating tube 2 20 are rotatably mounted on two sets of vertical plates 2 respectively, the multi-station selecting frame 7 is fixedly mounted between the rotating tube 1 8 and the rotating tube 2 20, the multi-station selecting frame 7 has a cylindrical discharge cavity inside, a plurality of screening cavities are arranged at the edge of the multi-station selecting frame 7, a discharge assembly is arranged in one of the screening cavities, and the other screening cavities are all arranged with selecting assemblies; A feed pipe 9 connected to the second rotating pipe 20, wherein the feed pipe 9 is fixedly mounted on the vertical plate 2 through an L-shaped plate, and the feed pipe 9 is rotatably connected to the second rotating pipe 20; A control component for adjusting the working state of the selection component and the discharge component; And a multifunctional driving mechanism for driving the rotating tube 8 to rotate intermittently.

[0028] In the embodiment of the present invention, the material is unselected biomass particles, and the feed pipe 9 is used to facilitate the introduction of the material into the discharge chamber of the multi-station selection frame 7 through the rotating pipe 20. The multifunctional driving component drives the rotating pipe 8 to rotate intermittently, and the rotating pipe 8 can drive the multi-station selection frame 7 to rotate synchronously, and cooperate with the selecting component to select the material. The setting of multiple groups of selecting components can realize multi-stage selection of materials. The control component controls the working state of the selecting component and the discharging component, and the selected material entering the screening chamber can be discharged. The discharging component can discharge the material that has not been selected and is finally left in the discharge chamber. It is convenient and quick. Compared with the prior art, the present invention avoids the problem that most of the existing biomass particle selecting machines have a simple screening structure, cannot realize graded selection well, and affect the production quality of biomass particles through the coordinated setting of the graded selection mechanism, the control component and the multifunctional driving mechanism.

[0029] In one embodiment of the present invention, see Figure 1-Figure 9 , the selection component comprises: A screening plate 23 for screening the material in the discharge cavity, wherein the screening plate 23 is arranged on the multi-station selection frame 7, and the screening plate 23 is located between the discharge cavity and the screening cavity; An elastic traction component located in the screening cavity, the elastic traction component being connected to a blocking cover plate 6 for blocking the screening cavity; The elastic traction assembly comprises: Compression boxes 21, two of which are symmetrically arranged in the screening chamber, and a piston plate 29 is slidably installed in each compression box 21; A push rod 22 fixedly mounted on the piston plate 29, wherein one end of the push rod 22 away from the piston plate 29 is fixedly connected to the blocking cover plate 6, and a through hole slidably connected to the push rod 22 is opened on the compression box 21; A second spring 28 for elastically pressing the piston plate 29, wherein the second spring 28 is sleeved on the push rod 22; The sieve plate 23 has an air guide cavity, and the filter hole of the sieve plate 23 is provided with a spray hole 31 connected to the air guide cavity, and the sieve plate 23 is provided with an air guide hole 30 connected to the air guide cavity. The compression box 21 is also provided with an air guide pipe 27, and the air guide pipe 27 is connected to the air guide hole 30; wherein the compression box 21 is also provided with an air inlet hole, and a one-way valve is provided in the air inlet hole and at the connection between the air guide pipe 27 and the compression box 21; The filter hole size of the sieve plates 23 in at least one group of the selection components is different from the filter hole size of the sieve plates 23 in other selection components, so as to facilitate graded screening and thus graded selection; The discharge assembly comprises: An inner blocking plate 24, which is used to block the discharge cavity and one of the screening cavities; Elastic telescopic rods 25, wherein a plurality of groups of elastic telescopic rods 25 are fixedly installed in the screening chamber; and a discharge plate 19, wherein the discharge plate 19 is fixedly mounted on the elastic telescopic rod 25, and the discharge plate 19 is fixedly connected to the inner blocking plate 24; The control component comprises: An L-shaped frame 12, wherein the L-shaped frame 12 is fixedly mounted on the base plate 1, and a rack 11 is slidably mounted on the L-shaped frame 12; A spring 16 for elastically supporting the rack 11, wherein the spring 16 is disposed on the L-shaped frame 12; A translation plate 4 fixedly mounted on the rack 11, wherein the translation plate 4 is provided with an electromagnet 18; and an adsorption patch 5 fixedly mounted on the blocking cover plate 6 and the discharge plate 19; The control assembly further comprises a telescopic cylinder 13 arranged on the vertical plate 2, a lifting plate 14 is fixedly mounted on the telescopic end of the telescopic cylinder 13, and an electromagnet 15 is arranged on the lifting plate 14.

[0030] In the present embodiment, a material guide plate 3 is further provided on the substrate 1, and the material guide plate 3 is used to facilitate the discharge of the selected materials. A collecting device can be provided at the end of the material guide plate 3 to collect the selected materials separately. The coordination between the multiple groups of screening plates 23 and the inner sealing plate 24 makes the discharge cavity a closed cavity, and the materials introduced by the rotating tube 20 will enter the closed cavity. The multifunctional driving mechanism can make the screening cavity continuously enter the working area of ​​the electromagnet 2 18 by driving the multi-station selection frame 7 to rotate intermittently. At the same time, the multifunctional driving mechanism is used to drive the rack 11 to move to one side of the multi-station selection frame 7, and cooperate with the electromagnet 2 18 to be energized to adsorb the adsorption patch 5. After adsorption, the spring 16 is used to push the rack 11 to reset, thereby pulling the blocking cover plate 6 away The multi-station selection frame 7 moves to facilitate the discharge of the selected materials in the screening chamber. When the blocking cover plate 6 moves to the maximum displacement, the electromagnet 18 is powered off, and the blocking cover plate 6 is reset under the pulling action of the push rod 22 to continue to block the screening chamber. When the discharge plate 19 moves to the working area of ​​the electromagnet 18, the electromagnet 18 is not powered. When the electromagnet 18 moves to the bottom, the telescopic cylinder 13 drives the lifting plate 14 to move up, and the electromagnet 15 is powered to adsorb the adsorption patch 5 on the discharge plate 19, so that the discharge plate 19 and the inner blocking plate 24 are away from the multi-station selection frame 7, which is convenient for discharging the materials that have not passed the screening. The inner blocking plate 24 has a slightly raised arc surface on the side away from the discharge plate 19, which can prevent the materials from piling up on it. The telescopic cylinder 13 can be an electric telescopic rod; When the push rod 22 moves outward following the blocking cover plate 6, the piston plate 29 can be used to guide the gas in the compression box 21 into the air guide hole 30 through the air guide pipe 27, and then it is sprayed out through the spray hole 31, effectively removing the dust in the filter holes of the screening plate 23 to prevent clogging. The spring 28 can push the piston plate 29 to reset, thereby driving the push rod 22 and the blocking cover plate 6 to reset.

[0031] In one embodiment of the present invention, see Figure 1-Figure 9 , the multifunctional driving mechanism comprises: A support shaft 17, wherein the support shaft 17 is rotatably mounted in the rotating tube 8, and a driven gear 32 is fixedly mounted on the support shaft 17; A driven plate 10, wherein the driven plate 10 is fixedly mounted on the rotating tube 8, and a plurality of arc grooves and strip holes are respectively opened at the edge of the driven plate 10, and the arc grooves and strip holes are arranged at intervals from each other; A rotating shaft 35, the rotating shaft 35 is rotatably mounted on the vertical plate 2, and a driving handle 36, a transmission gear 33 and an incomplete gear 34 are fixedly mounted on the rotating shaft 35, wherein the transmission gear 33 is meshed with the driven gear 32, and the incomplete gear 34 is intermittently meshed with the rack 11, one end of the driving handle 36 has a fan-shaped protrusion used in conjunction with the arc groove, and the other end of the driving handle 36 is rotatably mounted with a driving column 37 used in conjunction with the strip groove; and a motor 39 fixedly mounted on the vertical plate 2, wherein a driving gear 38 meshing with the transmission gear 33 is fixedly mounted on the output shaft of the motor 39; The support shaft 17 is also provided with a plurality of spoiler plates 26 for stirring the material in the discharge cavity.

[0032] In this embodiment, the number of the arc grooves, strip holes and screening chambers is the same, and the number of the arc grooves, strip holes and screening chambers is preferably eight. The motor 39 can drive the transmission gear 33 to rotate through the driving gear 38, and the transmission gear 33 is used to drive the rotating shaft 35, the driving handle 36 and the incomplete gear 34 to rotate synchronously. The transmission gear 33 can drive the driven gear 32 to rotate, and the driven gear 32 can drive the support shaft 17 to rotate, so that the spoiler 26 can be used to stir the material, which can accelerate the material to pass through the screening plate 23. The filter holes are prevented from being blocked. When the fan-shaped protrusion at the end of the driving handle 36 contacts the arc groove on the driven plate 10, the driven plate 10 will be fixed and will not rotate. When the fan-shaped protrusion at the end of the driving handle 36 is separated from the arc groove, the driving column 37 will move into the strip groove, thereby pushing the driven plate 10 to rotate, so that the driven plate 10 rotates 45°. The driven plate 10 can drive the multi-station picking frame 7 to rotate through the rotating tube 8, so as to continuously adjust the position of the screening chamber. The incomplete gear 34 can drive the rack 11 to move intermittently.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "slide", "rotate", "fix", "have" and the like should be understood in a broad sense, for example, it can be a welding connection, a bolt connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A biomass particle sorting machine, comprising a base plate and a vertical plate arranged on the base plate, wherein two groups of the vertical plates are symmetrically arranged on the base plate, characterized in that: Also includes: A grading and selecting mechanism, the grading and selecting mechanism comprises a multi-station selecting frame, a rotating tube 1 and a rotating tube 2, the rotating tube 1 and the rotating tube 2 are respectively rotatably mounted on two sets of vertical plates, the multi-station selecting frame is fixedly mounted between the rotating tube 1 and the rotating tube 2, the multi-station selecting frame has a cylindrical discharge cavity inside, a plurality of screening cavities are arranged at the edge of the multi-station selecting frame, a discharge assembly is arranged in one of the screening cavities, and the other screening cavities are all arranged with selecting assemblies; A feed pipe connected to the second rotating pipe, wherein the feed pipe is fixedly mounted on the vertical plate through an L-shaped plate, and the feed pipe is rotatably connected to the second rotating pipe; A control component for adjusting the working state of the selection component and the discharge component; And a multifunctional driving mechanism for driving the rotating tube to rotate intermittently.

2. The biomass particle sorting machine according to claim 1, characterized in that: The selection components include: A screening plate for screening the material in the discharge cavity, wherein the screening plate is arranged on the multi-station selection frame, and the screening plate is located between the discharge cavity and the screening cavity; An elastic traction component is located in the screening cavity, and a blocking cover plate for blocking the screening cavity is connected to the elastic traction component.

3. The biomass particle sorting machine according to claim 2, characterized in that: The elastic traction assembly comprises: Compression boxes, two of which are symmetrically arranged in the screening chamber, and a piston plate is slidably installed in each compression box; A push rod is fixedly mounted on the piston plate, one end of the push rod away from the piston plate is fixedly connected to the blocking cover plate, and a through hole slidably connected to the push rod is opened on the compression box; A second spring is used for elastically pressing the piston plate, and the second spring is sleeved on the push rod.

4. The biomass particle sorting machine according to claim 3, characterized in that: The sieve plate has an air guide cavity, and the filter holes of the sieve plate are provided with spray holes connected to the air guide cavity. The sieve plate is provided with air guide holes connected to the air guide cavity. The compression box is also provided with an air guide pipe, and the air guide pipe is connected to the air guide hole.

5. The biomass particle sorting machine according to claim 2, characterized in that: The filter hole size of the sieve plates in at least one group of the selection components is different from the filter hole size of the sieve plates in other selection components.

6. The biomass particle sorting machine according to claim 2, characterized in that: The discharge assembly comprises: An inner sealing plate, which is used to seal the discharge cavity and one of the screening cavities; Elastic telescopic rods, wherein a plurality of groups of elastic telescopic rods are fixedly installed in the screening chamber; And a discharge plate, wherein the discharge plate is fixedly mounted on the elastic telescopic rod, and the discharge plate is fixedly connected to the inner blocking plate.

7. The biomass particle sorting machine according to claim 6, characterized in that: The control component comprises: An L-shaped frame, wherein the L-shaped frame is fixedly mounted on the base plate, and a rack is also slidably mounted on the L-shaped frame; A spring 1 for elastically supporting the rack, wherein the spring 1 is arranged on the L-shaped frame; A translation plate fixedly mounted on the rack, wherein the translation plate is provided with a second electromagnet; And adsorption patches fixedly installed on the blocking cover plate and the unloading plate.

8. The biomass particle sorting machine according to claim 7, characterized in that: The control component also includes a telescopic cylinder arranged on the vertical plate, a lifting plate is fixedly installed on the telescopic end of the telescopic cylinder, and an electromagnet is arranged on the lifting plate.

9. The biomass particle sorting machine according to claim 8, characterized in that: The multifunctional driving mechanism comprises: A support shaft, the support shaft is rotatably mounted in the rotating tube, and a driven gear is fixedly mounted on the support shaft; A driven plate, the driven plate is fixedly mounted on the rotating tube, and a plurality of arc grooves and strip holes are respectively opened at the edge of the driven plate, and the arc grooves and strip holes are arranged at intervals from each other; A rotating shaft, the rotating shaft is rotatably mounted on the vertical plate, and a driving handle, a transmission gear and an incomplete gear are respectively fixedly mounted on the rotating shaft, wherein the transmission gear is meshed with the driven gear, and the incomplete gear is intermittently meshed with the rack, one end of the driving handle has a fan-shaped protrusion used in conjunction with the arc groove, and the other end of the driving handle is rotatably mounted with a driving column used in conjunction with the strip groove; And a motor is fixedly mounted on the vertical plate, and a driving gear meshing with the transmission gear is fixedly mounted on the output shaft of the motor.

10. The biomass particle sorting machine according to claim 9, characterized in that: The support shaft is also provided with a plurality of spoiler plates for stirring the materials in the discharge cavity.

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