A dryer for recycling waste sawdust

Abstract

The present invention relates to the technical field of drying treatment, and in particular to a dryer for recycling and treating waste sawdust, which comprises a drying box and a fluidizing mechanism, wherein the drying box is in the shape of a ring, and its cross-sectional shape is formed by splicing two left and right ellipses, and the long axis of the ellipses is vertical; the drying box is composed of a first sub-box body and a second sub-box body, the first sub-box body is located on the top of the second sub-box body, and the first sub-box body and the second sub-box body form a complete chamber; by setting the shape of the drying box to a ring, and setting its cross-sectional shape to a shape composed of two ellipses, the waste sawdust can be continuously fluidized and dried in the drying box by means of the effect of hot air flow discharged from air holes, so that the waste sawdust is always in a dispersed state, which facilitates the hot air flow to fully and comprehensively contact with the waste sawdust, and effectively improves the drying speed and drying effect.

Description

Technical Field

[0001] The invention relates to the technical field of drying treatment, in particular to a dryer for recycling waste sawdust. Background Art

[0002] Waste sawdust is the main waste product of various types of wood processing. Due to its fluffy structure, light weight and easy combustion, it can be used as fuel. This can not only prevent sawdust from damaging the environment, but also avoid harm to the human body when inhaling sawdust. At the same time, it can also achieve the effect of resource recycling. When processing waste sawdust, it is necessary to remove the moisture in it first, that is, to dry the waste sawdust. Generally, the dryer uses a hot air flow to heat and dry the waste sawdust in the conveying state. However, this drying method is not thorough, and high-temperature air is not easy to enter the piled waste sawdust, resulting in the inability to fully dry the waste sawdust. At the same time, the waste sawdust blocks each other, which easily causes slow evaporation of moisture and affects the drying efficiency. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a dryer for recycling and processing waste sawdust.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is: A dryer for recycling and processing waste sawdust, comprising a drying box and a fluidizing mechanism, wherein the drying box is in the shape of a ring, and its cross-section is formed by splicing two ellipses on the left and right, and the long axis of the ellipses is vertical; The drying box is composed of a first sub-box body and a second sub-box body, the first sub-box body is located on the top of the second sub-box body, and the first sub-box body and the second sub-box body form a complete chamber, and a plurality of vertical plates are arranged in a ring shape at the bottom of the inner wall of the first sub-box body; The fluidization mechanism comprises an annular channel arranged at the bottom of the second sub-box body, the annular channel penetrates into the second sub-box body, and a plurality of air holes are opened on the outer wall of the annular channel in the second sub-box body, and the direction of the air holes is inclined downward; Among them, a partition is vertically arranged in the second sub-box body, which separates the annular space in the second sub-box body, and the partition extends into the annular channel, which separates the annular space in the annular channel. A feed hopper and a discharge pipe are connected on the outer wall of the second sub-box body. The feed hopper and the discharge pipe are respectively located on the front and rear sides of the partition. The feed hopper is connected to the side wall of the second sub-box body, and the discharge pipe is connected to the bottom of the second sub-box body.

[0005] More preferably, a flat plate is provided on the top of the partition, and when the vertical plate moves to the flat plate position, the upper surface of the flat plate is in sliding contact with the bottom of the vertical plate, and the flat plate is in contact with at least one vertical plate on the first sub-box.

[0006] More preferably, an annular baffle is provided on the top of the annular channel, and the cross section of the annular baffle is conical.

[0007] More preferably, it also includes a gas circulation mechanism, which is used to continuously transport a hot air flow into the second sub-box. The gas circulation mechanism includes an air suction hopper, a first air pipe, an air pump, an electric heating box and a second air pipe. The output ends of the air suction hopper and the second air pipe are respectively located on the front and rear sides of the partition, the air suction hopper is connected to the outer wall of the second sub-box body, the input end of the air pump is connected to the air suction hopper through the first air pipe, the output end of the air pump is connected to the electric heating box, the bottom of the electric heating box is connected to the input end of the second air pipe, and the air pump and the electric heating box are both fixed on the outer wall of the second sub-box body.

[0008] More preferably, the suction hopper is tilted downward, and a filter screen for intercepting waste sawdust is provided in the suction hopper.

[0009] More preferably, each vertical plate has notches on both sides, and two retaining rings are arranged on the inner wall of the second sub-box body, and the two retaining rings are respectively located at two annular edge positions of the top opening of the second sub-box body, and the top of the retaining ring extends into the first sub-box body, and the outer wall of the retaining ring is close to the inner wall of the first sub-box body; A slide groove is provided on the circumferential outer wall of the first sub-box body, and a plurality of sliding blocks are slidably arranged in the slide groove. The sliding blocks are fixedly connected to the outer wall of the second sub-box body through a support plate.

[0010] More preferably, a fixing plate is provided on the outer wall in the middle of the second sub-box, the first motor is fixed on the fixing plate, a gear is provided at the upper output end of the first motor, and a gear ring is provided on the outer wall in the middle of the first sub-box, and the gear is meshed with the gear ring.

[0011] More preferably, a crushing mechanism is provided in the feed hopper, and the crushing mechanism is used to crush the agglomerated waste sawdust entering the feed hopper. The crushing mechanism includes a plurality of rotating shafts rotatably mounted side by side on the inner wall of the feed hopper, a plurality of crushing rods are provided on the rotating shafts, the ends of the rotating shafts extend out of the feed hopper, and transmission wheels are provided at the ends of the rotating shafts, two adjacent transmission wheels are meshed with each other for transmission, a second motor is fixed on the feed hopper, and the output end of the second motor is transmission-connected to a transmission wheel.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: by setting the shape of the drying box to be annular and its cross-sectional shape to be a shape composed of two ellipses, the waste sawdust can be continuously fluidized and dried in the drying box with the help of the hot air flow discharged from the air holes, so that the waste sawdust is always in a dispersed state, which facilitates the full and comprehensive contact between the hot air flow and the waste sawdust, effectively improving the drying speed and drying effect, and at the same time, combined with the continuous rotation of the first sub-box body and the multiple vertical plates thereon, the waste sawdust can be rotated and conveyed in a fluidized state, thereby conveying the waste sawdust from the feed hopper to the discharge pipe, thereby realizing continuous drying of the waste sawdust. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 yes Figure 1 Schematic diagram of the structure from top view; Figure 3 yes Figure 1 Middle upward structural diagram; Figure 4 yes Figure 1 A schematic diagram of the partially enlarged structure of the drying oven; Figure 5 yes Figure 1 A schematic diagram of the enlarged structure of the first sub-box body viewed from above; Figure 6 yes Figure 1 A schematic diagram of the structure of the second sub-box in the middle, viewed from above; Figure 7 yes Figure 1 A partial enlarged structural diagram of the middle feed hopper; Markings in the attached drawings: 1. first sub-box; 2. second sub-box; 3. vertical plate; 4. annular channel; 5. air holes; 6. partition; 7. feed hopper; 8. discharge pipe; 9. flat plate; 10. annular baffle; 11. suction hopper; 12. first air pipe; 13. air pump; 14. electric heating box; 15. second air pipe; 16. baffle ring; 17. slider; 18. support plate; 19. fixed plate; 20. first motor; 21. gear; 22. gear ring; 23. rotating shaft; 24. smashing rod; 25. transmission wheel; 26. second motor. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0016] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by “center”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “inside” and “outside”, etc., are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0017] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated 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, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. This embodiment is written in a progressive manner.

[0018] like Figures 1 to 7 As shown, a dryer for recycling and treating waste sawdust of the present invention comprises a drying box and a fluidizing mechanism, wherein the drying box is in the shape of a ring, and its cross-section is formed by splicing two left and right ellipses, and the long axis of the ellipses is vertical; The drying box is composed of a first sub-box body 1 and a second sub-box body 2. The first sub-box body 1 is located on the top of the second sub-box body 2, and the first sub-box body 1 and the second sub-box body 2 form a complete chamber. The bottom of the inner wall of the first sub-box body 1 is provided with a plurality of vertical plates 3 in a ring shape. The fluidizing mechanism comprises an annular channel 4 arranged at the bottom of the second sub-box 2, the annular channel 4 penetrates into the second sub-box 2, and a plurality of air holes 5 are opened on the outer wall of the annular channel 4 in the second sub-box 2, and the direction of the air holes 5 is inclined downward; Among them, a partition 6 is vertically arranged in the second sub-box body 2, and the partition 6 separates the annular space in the second sub-box body 2, and the partition 6 extends into the annular channel 4, and the partition 6 separates the annular space in the annular channel 4. A feed hopper 7 and a discharge pipe 8 are connected on the outer wall of the second sub-box body 2. The feed hopper 7 and the discharge pipe 8 are respectively located on the front and rear sides of the partition 6. The feed hopper 7 is connected to the side wall of the second sub-box body 2, and the discharge pipe 8 is connected to the bottom of the second sub-box body 2.

[0019] Specifically, a plurality of air holes 5 are arranged in two elliptical spaces on the drying box, and the direction of the air holes 5 is inclined toward the bottom of the elliptical inner wall of the drying box, so that when the hot air flow is discharged from the air holes 5, the hot air flow can flow upward along the elliptical inner wall of the drying box. In this way, when there is waste sawdust in the drying box, the hot air flow can push the waste sawdust to move upward along the two elliptical inner walls of the drying box. When the waste sawdust reaches the upper side of the drying box, due to the limitation of the shape of the drying box, the waste sawdust will gather toward the middle of the drying box and fall again to the vicinity of the annular channel 4. At this time, the waste sawdust discharged from the air holes 5 The hot air flow will blow the waste sawdust upward again, thereby achieving a continuous fluidization effect of the waste sawdust. At this time, the waste sawdust is in a flying and scattered state, so that the hot air flow can fully contact with the dispersed waste sawdust, which is convenient for comprehensive and rapid drying of the waste sawdust. Since the partition 6 separates the annular space inside the second sub-box 2 and the annular space inside the annular channel 4, the hot air flow discharged into the annular channel 4 can flow from one side wall of the partition 6 along the annular trajectory of the annular channel 4 to the other side wall of the partition 6, so that the hot air flow fully fills the annular channel 4, and the annular channel 4 The hot air flow can be discharged through the multiple air holes 5 thereon, thereby realizing the comprehensive fluidization drying working mode of the waste sawdust in the second sub-box body 2. At the same time, when the waste sawdust is discharged into the second sub-box body 2 through the feed hopper 7, the first sub-box body 1 is rotated, and the first sub-box body 1 can carry the multiple vertical plates 3 thereon to rotate. When the waste sawdust moves upward in fluidization to between two adjacent vertical plates 3 in the first sub-box body 1, the moving vertical plates 3 will carry the waste sawdust along the circular trajectory of the second sub-box body 2 for a certain distance, and the waste sawdust falls synchronously during the movement. With the continuous rotation of the first sub-box body 1 and the waste sawdust The waste sawdust is continuously fluidized, so that the waste sawdust moves from one side wall of the partition 6 to the other side wall of the partition 6 along the circular trajectory of the second sub-box body 2, so that the circular transportation of the waste sawdust in the second sub-box body 2 can be realized, and the waste sawdust is continuously in a fluidized drying state during transportation. When the dry waste sawdust moves to the position of the discharge pipe 8, the waste sawdust will be naturally discharged through the discharge pipe 8, thereby realizing the continuous drying of the waste sawdust. At the same time, the rotation of the first sub-box body 1 and the multiple vertical plates 3 can also promote the hot air flow in the drying box to rotate and flow along the circular trajectory of the second sub-box body 2.

[0020] By setting the shape of the drying box to be annular and its cross-sectional shape to be a shape consisting of two ellipses, the waste sawdust can be continuously fluidized and dried in the drying box with the help of the hot air flow discharged from the air holes 5, so that the waste sawdust is always in a dispersed state, which facilitates the full and comprehensive contact between the hot air flow and the waste sawdust, effectively improving the drying speed and drying effect. At the same time, combined with the continuous rotation of the first sub-box 1 and the multiple vertical plates 3 thereon, the waste sawdust can be rotated and transported in a fluidized state, thereby transporting the waste sawdust from the feed hopper 7 to the discharge pipe 8, thereby realizing continuous drying of the waste sawdust.

[0021] Preferably, a flat plate 9 is disposed on the top of the partition 6 , and when the vertical plate 3 moves to the position of the flat plate 9 , the upper surface of the flat plate 9 slides in contact with the bottom of the vertical plate 3 , and the flat plate 9 contacts at least one vertical plate 3 on the first sub-box 1 .

[0022] Specifically, due to the large gap between two adjacent vertical plates 3, when the two adjacent vertical plates 3 are respectively located on the front and rear sides of the partition 6, the space on the front and rear sides of the partition 6 will be connected through the space between the two adjacent vertical plates 3. At this time, the waste sawdust or hot air flow will pass through the space between the two adjacent vertical plates 3 and move directly from one side of the partition 6 to the other side of the partition 6. In this way, the drying of the waste sawdust cannot be achieved. Therefore, a flat plate 9 is required to be set to seal it. Since the flat plate 9 is in contact with at least one vertical plate 3 on the first sub-box body 1, and the first sub-box body 1 and multiple vertical plates 3 rotate unidirectionally, the space on the front and rear sides of the partition 6 cannot be connected through the space between the two adjacent vertical plates 3, thereby achieving dynamic isolation of the space on the front and rear sides of the partition 6.

[0023] More preferably, an annular baffle 10 is disposed at the top of the annular channel 4, and the cross section of the annular baffle 10 is conical.

[0024] Specifically, by setting up the annular baffle 10, the waste sawdust falling in the drying box can be conveniently diverted to avoid the waste sawdust from being deposited on the top of the annular channel 4 and from entering the air blast hole 5. At the same time, the conical surface of the annular baffle 10 can guide the hot air flow discharged from the air blast hole 5.

[0025] More preferably, it also includes a gas circulation mechanism, which is used to continuously transport a hot air flow into the second sub-box body 2. The gas circulation mechanism includes an air suction hopper 11, a first air pipe 12, an air pump 13, an electric heating box 14 and a second air pipe 15. The output ends of the air suction hopper 11 and the second air pipe 15 are respectively located on the front and rear sides of the partition 6. The air suction hopper 11 is connected to the outer wall of the second sub-box body 2. The input end of the air pump 13 is connected to the air suction hopper 11 through the first air pipe 12. The output end of the air pump 13 is connected to the electric heating box 14. The bottom of the electric heating box 14 is connected to the input end of the second air pipe 15. The air pump 13 and the electric heating box 14 are both fixed on the outer wall of the second sub-box body 2.

[0026] Specifically, the air pump 13 extracts the air in the second sub-box 2 on one side of the partition 6 through the first air pipe 12 and the air suction hopper 11 and discharges the air into the electric heating box 14. The electric heating box 14 heats the air and forms a hot air flow. The hot air flow is discharged into the electric heating box 14 through the second air pipe 15, thus forming a circulating flow state of the hot air flow in the second sub-box 2.

[0027] More preferably, the suction hopper 11 is tilted downward, and a filter screen for intercepting waste sawdust is provided inside the suction hopper 11.

[0028] Specifically, the filter screen can prevent waste sawdust from entering the gas circulation mechanism.

[0029] More preferably, each vertical plate 3 has notches on both sides, and two retaining rings 16 are provided on the inner wall of the second sub-box body 2, and the two retaining rings 16 are respectively located at two annular edge positions of the top opening of the second sub-box body 2, and the top of the retaining ring 16 extends into the first sub-box body 1, and the outer wall of the retaining ring 16 is close to the inner wall of the first sub-box body 1; A slide groove is provided on the circumferential outer wall of the first sub-box body 1 , and a plurality of sliding blocks 17 are slidably provided in the slide groove. The sliding blocks 17 are fixedly connected to the outer wall of the second sub-box body 2 via a support plate 18 .

[0030] Specifically, since the first sub-box body 1 needs to rotate on the second sub-box body 2, in order to avoid friction damage between the first sub-box body 1 and the second sub-box body 2, it is necessary to leave a small gap between the first sub-box body 1 and the second sub-box body 2, and the retaining ring 16 is used to block the gap to reduce air circulation. At the same time, since the retaining ring 16 extends upward to block the gap, it will not affect the fluidized waste sawdust in the drying box. The slider 17 and the support plate 18 support the first sub-box body 1.

[0031] More preferably, a fixing plate 19 is provided on the outer wall in the middle position of the second sub-box body 2, a first motor 20 is fixed on the fixing plate 19, a gear 21 is provided at the upper output end of the first motor 20, and a gear ring 22 is provided on the outer wall in the middle position of the first sub-box body 1, and the gear 21 is meshed with the gear ring 22.

[0032] Specifically, the first motor 20 can drive the first sub-box body 1 to rotate through the gear 21 and the gear ring 22 , thereby providing power for the first sub-box body 1 , and the fixing plate 19 supports the first motor 20 .

[0033] More preferably, a crushing mechanism is provided in the feed hopper 7, and the crushing mechanism is used to crush the agglomerated waste sawdust entering the feed hopper 7. The crushing mechanism includes a plurality of rotating shafts 23 rotatably mounted side by side on the inner wall of the feed hopper 7, a plurality of crushing rods 24 are provided on the rotating shafts 23, the ends of the rotating shafts 23 extend outside the feed hopper 7, and a transmission wheel 25 is provided at the ends of the rotating shafts 23, and two adjacent transmission wheels 25 are meshed with each other for transmission, a second motor 26 is fixed on the feed hopper 7, and the output end of the second motor 26 is transmission-connected to a transmission wheel 25.

[0034] Specifically, the second motor 26 can drive multiple transmission wheels 25 to rotate synchronously, thereby driving multiple rotating shafts 23 and multiple crushing rods 24 to rotate synchronously. The crushing rods 24 can crush the waste sawdust entering the feed hopper 7, thereby avoiding the waste sawdust from agglomerating and affecting the drying effect in the second sub-box 2.

[0035] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A dryer for recycling waste sawdust, characterized in that: It includes a drying box and a fluidizing mechanism. The drying box is annular in shape, and its cross-section is formed by splicing two ellipses on the left and right, and the long axis of the ellipses is vertical. The drying box is composed of a first sub-box body (1) and a second sub-box body (2), the first sub-box body (1) is located on the top of the second sub-box body (2), and the first sub-box body (1) and the second sub-box body (2) form a complete chamber, and a plurality of vertical plates (3) are arranged in a ring shape at the bottom of the inner wall of the first sub-box body (1); The fluidizing mechanism comprises an annular channel (4) arranged at the bottom of the second sub-box (2), the annular channel (4) penetrates into the second sub-box (2), a plurality of air holes (5) are provided on the outer wall of the annular channel (4) in the second sub-box (2), and the air holes (5) are inclined downward; A partition (6) is vertically arranged in the second sub-box (2), the partition (6) partitions the annular space in the second sub-box (2), and the partition (6) extends into the annular channel (4), the partition (6) partitions the annular space in the annular channel (4), a feed hopper (7) and a discharge pipe (8) are arranged on the outer wall of the second sub-box (2), the feed hopper (7) and the discharge pipe (8) are respectively located on the front and rear sides of the partition (6), the feed hopper (7) is connected to the side wall of the second sub-box (2), and the discharge pipe (8) is connected to the bottom of the second sub-box (2).

2. A dryer for recycling waste sawdust as claimed in claim 1, characterized in that: A flat plate (9) is arranged on the top of the partition (6); when the vertical plate (3) moves to the position of the flat plate (9), the upper surface of the flat plate (9) slides in contact with the bottom of the vertical plate (3), and the flat plate (9) contacts at least one vertical plate (3) on the first sub-box (1).

3. A dryer for recycling waste sawdust as claimed in claim 2, characterized in that: An annular baffle (10) is provided at the top of the annular channel (4), and the cross section of the annular baffle (10) is conical.

4. A dryer for recycling waste sawdust as claimed in claim 3, characterized in that: The invention also comprises a gas circulation mechanism, the gas circulation mechanism being used for continuously conveying a hot gas flow into the second sub-box body (2), the gas circulation mechanism comprising an air suction hopper (11), a first air pipe (12), an air delivery pump (13), an electric heating box (14) and a second air pipe (15), the output ends of the air suction hopper (11) and the second air pipe (15) being respectively located at the front and rear sides of the partition (6), the air suction hopper (11) being connected to the outer wall of the second sub-box body (2), the input end of the air delivery pump (13) being connected to the air suction hopper (11) through the first air pipe (12), the output end of the air delivery pump (13) being connected to the electric heating box (14), the bottom of the electric heating box (14) being connected to the input end of the second air pipe (15), and the air delivery pump (13) and the electric heating box (14) being fixed to the outer wall of the second sub-box body (2).

5. The dryer for recycling waste sawdust as claimed in claim 4, characterized in that: The air suction hopper (11) is inclined downward, and a filter screen for intercepting waste sawdust is arranged inside the air suction hopper (11).

6. A dryer for recycling waste sawdust as claimed in claim 5, characterized in that: Each vertical plate (3) is provided with notches on both sides thereof. Two retaining rings (16) are provided on the inner wall of the second sub-box body (2). The two retaining rings (16) are respectively located at two annular edge positions of the top opening of the second sub-box body (2). The top of the retaining ring (16) extends into the first sub-box body (1), and the outer wall of the retaining ring (16) is close to the inner wall of the first sub-box body (1). A slide groove is provided on the circumferential outer wall of the first sub-box body (1), a plurality of sliding blocks (17) are slidably arranged in the slide groove, and the sliding blocks (17) are fixedly connected to the outer wall of the second sub-box body (2) via a support plate (18).

7. The dryer for recycling waste sawdust as claimed in claim 6, characterized in that: A fixing plate (19) is arranged on the outer wall at the middle position of the second sub-box body (2), a first motor (20) is fixed on the fixing plate (19), a gear (21) is arranged at the upper output end of the first motor (20), and a gear ring (22) is arranged on the outer wall at the middle position of the first sub-box body (1), the gear (21) meshing with the gear ring (22).

8. The dryer for recycling waste sawdust as claimed in claim 7, characterized in that: A crushing mechanism is provided in the feed hopper (7), and is used for crushing the agglomerated waste sawdust entering the feed hopper (7). The crushing mechanism comprises a plurality of rotating shafts (23) rotatably mounted side by side on the inner wall of the feed hopper (7), a plurality of crushing rods (24) are provided on the rotating shafts (23), the ends of the rotating shafts (23) extend outside the feed hopper (7), and a transmission wheel (25) is provided at the ends of the rotating shafts (23), two adjacent transmission wheels (25) are meshed with each other for transmission, a second motor (26) is fixed on the feed hopper (7), and an output end of the second motor (26) is transmission-connected to a transmission wheel (25).

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