JP7419062B2 - Conveying device and method - Google Patents

Description

The present disclosure relates to a conveyance device and a conveyance method for conveying solid fuel.

BACKGROUND ART Conventionally, a belt conveyor is known in which objects to be transported, such as coal, are loaded on a conveyor belt and transported (see, for example, Patent Document 1). The belt conveyor disclosed in Patent Document 1 has a pair of belts that are formed by hanging vertically along the longitudinal direction of the conveyor belt at both ends of the conveyor belt in the width direction from a chute through which conveyed items are dropped from the upstream conveyor. A skirt member is provided with a lower end proximate the surface of the conveyor belt. The pair of skirt members is provided with a length that allows the transported object to be stabilized on the conveyor belt so that the transported object dropped from the chute does not fall off the conveyor belt.

Patent No. 3389729

As in Patent Document 1, when the conveyed object on the conveyor belt is coal, the amount of fine powder dust generated due to contact between the conveyed objects and mutual collision when the conveyed objects are thrown onto the conveyor belt is Relatively few. Therefore, dust flows backwards from the point where coal and fine powder, which are conveyed objects that have fallen from the end of the conveyor belt in the conveying direction to a hopper, etc., fall, due to the air current generated when dropping, Therefore, the amount of dust introduced to the inside of the conveyor is small.

However, if the conveyed objects include solid fuels whose surfaces tend to crumble, such as wood-based solid fuels such as biomass fuel, the conveyed objects may come into contact with each other or collide with each other when they are put onto the conveyor belt. The surface of the object may collapse and a large amount of dust may be generated from the transported object. In this case, the generated dust flows from the end of the conveyor belt in the conveying direction to the point at which the conveyed object falls into the hopper, etc., and flows backwards due to the air current generated when the conveyed object falls and is thrown into the upper part of the conveyor. The amount of dust introduced increases.

In particular, when a casing is provided to house the conveyor belt so that the dust scattered from the conveyor belt does not flow out from the belt conveyor, a large amount of dust may accumulate on the bottom surface inside the casing. If a large amount of dust accumulates inside the casing, the accumulated dust may obstruct the conveyance mechanism of the conveyor belt, resulting in a malfunction. Furthermore, a large amount of dust accumulated inside the casing may be ignited due to oxidation and temperature rise.

The present disclosure has been made in view of the above circumstances, and even when the conveyed object contains solid fuel that easily generates dust, dust is generated from the conveyed object in the casing section that accommodates the conveyor belt. It is an object of the present invention to provide a conveyance device and a conveyance method that can suppress the accumulation of dust.

A conveyance device according to an aspect of the present disclosure includes a conveyance belt for conveying solid fuel along a conveyance direction, and a conveyance belt that applies a conveyance force to the conveyance belt to convey the conveyance belt along the conveyance direction. a pair of rotating bodies disposed at both ends of the conveyor belt; a fuel dropping part that guides the solid fuel falling from the downstream end of the conveyor belt vertically downward; and a fuel dropping part that accommodates the conveyor belt therein. a casing part that prevents dust of the solid fuel guided vertically downward by the fuel injection part from flowing into the inside of the casing part, and a dustproof sheet formed in a sheet shape of an elastically deformable material; , the casing section has a lower casing that is disposed below the conveyor belt in the vertical direction and extends along the conveyor belt, and the fuel injection section is located downstream of the lower casing in the conveyance direction. The dustproof sheet has an inclined surface connected to a side end and extends vertically downward, and the dustproof sheet is disposed downstream of the downstream end of the lower casing with respect to the conveyance direction, and the dustproof sheet The dustproof sheet is arranged such that the upper end of the sheet is close to the conveyor belt and the lower end of the dustproof sheet is in contact with the inclined surface.

A transport method according to one aspect of the present disclosure is a transport method using a transport device that transports the solid fuel along the transport direction, the transport device configured to transport the solid fuel along the transport direction. a belt, a pair of rotating bodies disposed at both ends of the conveyance direction that apply a conveyance force to the conveyance belt to convey the conveyance belt along the conveyance direction; A fuel dropping part that guides the solid fuel falling from the end vertically downward, a casing part that houses the conveyor belt therein, and a dust of the solid fuel guided vertically downward by the fuel dropping part is a dustproof sheet formed in a sheet shape of an elastically deformable material to prevent the dust from flowing into the inside of the casing part; the casing part is disposed below the conveyor belt in the vertical direction; It has a lower casing extending along the belt, the fuel injection part has an inclined surface connected to the downstream end of the lower casing in the transport direction and extends vertically downward, and the dustproof sheet is arranged downstream of the downstream end of the lower casing with respect to the conveyance direction, and the upper end of the dustproof sheet is close to the conveyor belt, and the lower end of the dustproof sheet is in contact with the inclined surface. a conveyance step in which the solid fuel is conveyed by imparting a conveyance force to the conveyance belt by the pair of rotating bodies to convey the conveyance belt along the conveyance direction; and a conveyance step in which the solid fuel is conveyed in the conveyance step. and a fuel dropping step of dropping the solid fuel from the downstream end of the conveyor belt in the conveying direction and guiding the solid fuel downward by the fuel dropping part.

According to the present disclosure, even if the conveyed object contains solid fuel that easily generates dust, the conveyance can suppress the accumulation of dust generated from the conveyed object in a casing portion that accommodates the conveyor belt. Apparatus and delivery methods can be provided.

FIG. 1 is a longitudinal cross-sectional view of a belt conveyor according to an embodiment of the present disclosure. FIG. 2 is a partially enlarged view of part A of the belt conveyor shown in FIG. 1. FIG. 3 is a sectional view taken along the line BB of the belt conveyor shown in FIG. 2. FIG.

Hereinafter, a belt conveyor (conveyance device) 100 and a conveyance method using the belt conveyor 100 according to an embodiment of the present disclosure will be described with reference to the drawings. FIG. 1 is a longitudinal cross-sectional view of a belt conveyor 100 according to an embodiment of the present disclosure. FIG. 2 is a partially enlarged view of part A of the belt conveyor shown in FIG. 1. FIG. FIG. 3 is a sectional view taken along the line BB of the belt conveyor 100 shown in FIG. In the following description, the term "upper" or "upper" refers to the upper side in the vertical direction, and the term "lower" or "lower" refers to the lower side in the vertical direction.

The belt conveyor 100 of this embodiment is a device that conveys an object containing biomass fuel such as wood-based solid fuel, as a solid fuel that easily generates dust. Here, the wood-based solid fuel is, for example, wood-based biomass fuel such as thinned wood, waste wood, driftwood, and grass. Biomass fuels such as wood-based solid fuels are formed into pellets or chips, for example. The belt conveyor 100 of this embodiment is capable of conveying only biomass fuel such as wood solid fuel, conveying a mixture of biomass fuel such as wood solid fuel and non-wood solid fuel (such as coal), and conveying a mixture of biomass fuel such as wood solid fuel and non-wood solid fuel (such as coal). It is possible to transport only wood-based solid fuels. Hereinafter, various types of fuels, including solid fuels that tend to generate dust, which are conveyed by the belt conveyor 100 of this embodiment, will be referred to as solid fuel SF.

As shown in FIG. 1, the belt conveyor 100 includes a conveyor belt (transport belt) 10, a head pulley (rotating body) 20, a tail pulley (rotating body) 20a, a plurality of conveyor rollers (conveying rollers) 30, and a snub pulley. 35, the skirt plate (wall part) 40, the seal part 50, the injection chute (fuel injection part) 60, the head chute (fuel injection part) 70, the upper casing (casing part) 80, and the side casing ( casing part) 84, a lower casing (casing part) 82, a dustproof sheet 90, and a belt cleaner (cleaning part) 95.

In this embodiment, the conveyor belt 10 is a long conveyor belt for loading and conveying solid fuel SF on the upper surface of the belt that moves horizontally, for example, along the conveyance direction TD on the left side of the paper as shown in FIG. It is an ulnar belt. The conveyor belt 10 is wound around a head pulley 20 and a tail pulley 20a that are arranged at both ends of the conveyance direction TD, that is, a start point on the upstream side of conveyance and a terminal point on the downstream side. The conveyor belt 10 is made of natural rubber or synthetic rubber, for example. Further, in this embodiment, the conveying surface, which is the upper surface of the conveyor belt 10, is along the horizontal direction, for example, but is not limited to the horizontal direction, and is inclined from the horizontal direction in a diagonally downward direction or diagonally upward direction. It may be along the

The head pulley 20 and the tail pulley 20a are arranged at the start and end points of the conveyance, which are both ends of the conveyance direction TD, and apply conveyance force to the conveyor belt 10 to convey the conveyor belt 10 along the conveyance direction TD. do. In FIG. 1, the head pulley 20 disposed on the downstream side in the conveyance direction (on the left side in the paper) is a rotating body that extends along the drive shaft 21, and is rotated counterclockwise in the paper by a drive motor (not shown) around the drive shaft 21. A rotating driving force is applied to move the conveyor belt 10 along the transport direction TD. The tail pulley 20a arranged on the upstream side in the conveyance direction is a rotating body that extends along the driven shaft 21a.

The conveyor roller 30 is held at a constant position so that the conveyor belt 10 does not bend due to the load and own weight of the solid fuel SF loaded on the conveying surface, which is the upper surface of the conveyor belt 10, which is passed around the head pulley 20 and the tail pulley 20a. This is Laura. The conveyor roller 30 rotates in the opposite direction to the head pulley 20 while contacting the conveyor belt 10. As shown in FIG. 1, a plurality of conveyor rollers may be arranged below the input chute 60 at shorter intervals in the conveying direction than at other locations. This is to support the load generated when the solid fuel SF input from the input chute 60 falls onto the upper surface of the conveyor belt 10 and collide with it, and to reduce the amplitude of the conveyor belt 10 due to the collision of the solid fuel SF. It is.

The snub pulley 35 is a rotating body that applies a predetermined tension to the conveyor belt 10 that is passed around the head pulley 20 and the tail pulley 20a. As shown in FIG. 1, the snub pulley 35 applies a predetermined tension to the conveyor belt 10 by contacting the conveyor belt 10 guided below the head pulley 20 after solid fuel SF is dropped downward by a head chute 70 (described later). Grant.

The skirt plates 40 extend along the conveyance direction TD and are spaced apart from each other at both ends of the conveyor belt 10 in the width direction WD perpendicular to the conveyance direction TD, and form an accommodation space for accommodating the solid fuel SF. It is something. A pair of skirt plates 40 are arranged so as to be substantially symmetrical with respect to the center portion of the conveyor belt 10 in the width direction WD.

The seal portion 50 is a member that extends along the conveyance direction TD and forms a seal area between the skirt plate 40 and the upper surface of the conveyor belt 10. The seal portion 50 prevents dust of the solid fuel SF transported by the conveyor belt 10 from scattering to the outside of the conveyor belt 10. A pair of seal portions 50 disposed at both ends of the conveyor belt 10 in the width direction WD are respectively attached to the lower ends of the pair of skirt plates 40 in close proximity to the conveyance surface, which is the upper surface of the conveyor belt 10.

The input chute 60 is for inputting the solid fuel SF from above toward the conveyance surface, which is the upper surface of the conveyor belt 10, on the upstream side of the conveyor belt 10 in the conveyance direction TD. The input chute 60 is formed into a cylindrical shape, for example, a rectangular cross-sectional view.

The head chute 70 guides the solid fuel SF falling from the downstream end of the conveyor belt 10 in the transport direction TD downward, and charges it into a hopper (not shown), for example. The head chute 70 is formed to extend downward along the vertical direction. In this embodiment, the head chute 70 is arranged at a portion downstream in the transport direction TD from the downstream end 82a of the lower casing 82 in the transport direction TD. Further, the position of the downstream end portion 82a in the conveyance direction TD is a position P1 on the conveyance surface of the conveyor belt 10.

As shown in FIG. 2, the head chute 70 has an inclined surface 71 connected to the downstream end 82a of the lower casing 82 in the transport direction TD, and a vertical surface 72 connected to the inclined surface 71. The inclined surface 71 is a surface that is inclined downward in the vertical direction by an inclination angle θ with respect to the lower casing 82 that extends in the horizontal direction, for example, along the conveyance surface that is the upper surface of the conveyor belt 10 . The solid fuel SF includes fine powder dust PD that is generated due to collisions with the conveyor belt 10 or mutual collisions between the solid fuel SFs when the solid fuel SF is introduced onto the upper surface of the conveyor belt 10.

Further, when the solid fuel SF guided downward from the downstream end of the conveyor belt 10 in the conveyance direction TD by the head chute 70 and falls is thrown into a hopper (not shown), for example, the solid fuel SF may collide with each other, etc. Fine powder dust PD is generated. The inclination angle θ is desirably set to be larger than the angle of repose of the dust PD of the solid fuel SF and 90 degrees or less. When the inclination angle θ is 90 degrees, the inclined surface 71 becomes a vertical surface extending along the vertical direction. Although the angle of repose depends on the properties of the dust PD of the solid fuel SF, it is, for example, from 40 degrees to 60 degrees in this embodiment.

The upper casing 80 is a part of a casing part that houses the conveyor belt 10, the head pulley 20, the tail pulley 20a, the plurality of conveyor rollers 30, the skirt plate 40, and the seal part 50, and It is disposed on the upper side away from the conveying surface which is the upper surface of 10. As shown in FIG. 1, the upper casing 80 is formed to extend, for example, in the horizontal direction along a conveyance surface that is the upper surface of the upper conveyor belt 10 that moves in the conveyance direction TD of the solid fuel SF.

The lower casing 82 is a part of a casing portion that houses the conveyor belt 10, the head pulley 20, the tail pulley 20a, the plurality of conveyor rollers 30, the skirt plate 40, and the seal portion 50, and 10 is placed on the lower side. As shown in FIG. 1, the lower casing 82 is disposed on the lower side at a distance from the lower conveyor belt 10 moving in the opposite direction to the conveying direction TD of the solid fuel SF, and is located on the upper surface of the conveyor belt 10. It is formed to extend along a certain conveyance surface, for example, in the horizontal direction.

The side casing 84 is a part of a casing portion that houses the conveyor belt 10, the head pulley 20, the tail pulley 20a, the plurality of conveyor rollers 30, the skirt plate 40, and the seal portion 50, and They are arranged in pairs on the lateral sides of the belt 10. The side casing 84 has an upper end connected to an end of the upper casing 80 in the width direction WD, and a lower end connected to an end of the lower casing 82 in the width direction WD.

As shown in FIG. 3, the pair of side casings 84 are arranged to form a housing space SA that accommodates the conveyor belt 10. The upper casing 80, the lower casing 82, and the pair of side casings 84 form an accommodation space SA having a substantially rectangular cross section in the vertical direction.

The dustproof sheet 90 is a member that prevents the dust PD of the solid fuel SF guided downward by the head chute 70 from flowing backward due to the air current generated when the solid fuel SF is introduced downward, flowing into the lower casing 82, and accumulating. . The dustproof sheet 90 is formed into a sheet shape from an elastically deformable material (for example, a resin material such as a rubber material or a fluororesin material). It is more desirable that the dustproof sheet 90 be made of a material that is flame retardant and does not easily generate static electricity (for example, a fluororesin material).

Further, the dustproof sheet 90 has enough rigidity to not vibrate significantly even when exposed to the airflow of dust PD flowing backward through the head chute 70, and the lower end surface portion of the dustproof sheet 90 is flexible along the inclined surface 71. It is desirable to have flexibility that allows for close contact. The thickness of the dustproof sheet 90 is set to, for example, t1 mm to t3 mm. Note that the thickness of the dustproof sheet 90 may not be uniform. For example, the upper end of the dustproof sheet 90 may be thicker than other parts, the central part may be thicker than other parts, or the lower end may be thicker than other parts. or a combination of them.

As shown in FIG. 3, in the width direction WD of the conveyor belt 10, the dustproof sheet 90 has a length L1, and the distance between the pair of side casings 84 has a length L2. It is desirable to set the length L1 to 60% or more of the length L2. The reason why the length L1 is set to be 60% or more of the length L2 is that a large area of the space between the pair of side casings 84 where the dust PD of the solid fuel SF that has flowed back exists is sealed off with the dustproof sheet 90. This is because it is effective in reliably suppressing dust PD from flowing into the lower casing 82.

Further, it is desirable that the length L1 is set to less than 100% of the length L2. For example, if the distance of the gap GP formed between the end of the dustproof sheet 90 and the side casing 84 in the width direction WD is the length L3, the length L1 should be 60% or more of the length L2. Therefore, it is desirable to set L3 to be greater than 0 mm and less than 300 mm.

The reason why the length L1 is less than 100% of the length L2 is that even if the dustproof sheet 90 is exposed to the airflow of dust PD flowing backward through the head chute 70, the side end surface of the dustproof sheet 90 and the inner surface of the side casing 84 This is because the lower end surface portion of the dustproof sheet 90 can be brought into close contact with the inclined surface 71 by suppressing interference and getting caught.

Further, if the gap GP is not formed between the dustproof sheet 90 and the side casing 84, there is no gap through which the airflow rising with the dust PD can flow, so the dustproof sheet 90 is displaced by the airflow, and the gap GP is formed by the displacement. In addition, the occurrence of uneven gaps may disrupt the airflow and cause dust PD to flow into the lower casing 82 from the gaps. In contrast, in the present embodiment, since there is a gap GP through which the airflow rising together with the dust PD flows, the dustproof sheet 90 is suppressed from being displaced by the airflow, and the turbulence of the airflow due to the uniform gap is suppressed, so that the lower casing It is possible to suppress the dust PD from flowing toward 82.

The dustproof sheet 90 shown in FIG. 3 is a single sheet-like member having a length L1 along the width direction WD, but may have other forms. For example, a plurality of sheets having a length shorter than the length L1 may be arranged along the width direction WD to have the length L1 as a whole.

Furthermore, it is desirable that the dustproof sheet 90 be disposed at a central portion in the width direction WD between at least a pair of side casings 84 . The central portion between the pair of side casings 84 is a location where the amount of backflowing dust PD is greatest. Therefore, by arranging the dustproof sheet 90 in the center between at least a pair of side casings 84, it is possible to effectively suppress dust PD from flowing into the lower casing 82.

As shown in FIG. 2, the dustproof sheet 90 is arranged downstream of the downstream end 82a of the lower casing 82 in the transport direction TD. Further, the dustproof sheet 90 is arranged such that the upper end 90a in the vertical direction is close to the lower surface of the conveyor belt 10, and the lower end 90b is in contact with the inclined surface 71 of the head chute 70. As shown in FIG. 2, in this embodiment, the dustproof sheet 90 has an upper end 90a attached to and supported by a belt cleaner 95.

The belt cleaner 95 is a mechanism that removes and cleans the solid fuel SF adhering to the conveyor belt 10. As shown in FIG. 2, the belt cleaner 95, which is supported at the upper end 90a in the vertical direction of the dustproof sheet 90, is located downstream in the transport direction TD than the downstream end 82a of the lower casing 82 in the transport direction TD. has been done. The belt cleaner 95 includes, for example, a cleaner chip 95a, a chip support portion 95b, a mounting support 95c, a fastening bolt 95d, and a fastening nut 95e.

The cleaner chip 95a is made of an elastic material such as rubber, and comes into contact with the conveyor belt 10 guided below the head pulley 20 after solid fuel SF is dropped downward by the head chute 70. The cleaner chip 95a removes the solid fuel SF that remains attached to the conveyor belt 10 without falling downward through the head chute 70 from the conveyor belt 10. As shown in FIG. 3, the cleaner chip 95a is arranged along the width direction WD of the conveyor belt 10 so as to contact the conveyance surface 10a of the conveyor belt 10.

The chip support portion 95b is a member to which the cleaner chip 95a is attached to the upper end in the vertical direction, and the lower end in the vertical direction is connected to the mounting support 95c. The chip support portion 95b is a member for supporting the cleaner chip 95a at a fixed position with respect to a mounting post 95c fixed to the side casing 84.

The mounting support 95c is a member for supporting the chip support portion 95b at a fixed position relative to the side casing 84. As shown in FIG. 3, the mounting support 95c is a substantially cylindrical member formed to extend in the horizontal direction (width direction WD of the conveyor belt 10). Both ends of the mounting column 95c are fixed to a pair of side casings 84, respectively.

As shown in FIG. 2, a through hole 95aA is formed in the cleaner chip 95a. Furthermore, a through hole 95bA is formed in the chip support portion 95b. Further, the dustproof sheet 90 has a through hole 90c formed therein. A fastening bolt 95d fastened to the fastening nut 95e is inserted into the through hole 90c, the through hole 95aA, and the through hole 95bA.

The cleaner chip 95a is attached to the chip support portion 95b by fastening the fastening bolt 95d to the fastening nut 95e. In addition, the vertically upper end 90a of the dustproof sheet 90 is attached to the belt cleaner 95 by fastening the fastening bolt 95d to the fastening nut 95e.

Next, a conveyance method in which the belt conveyor 100 of this embodiment conveys the solid fuel SF along the conveyance direction TD will be described.
First, solid fuel SF is charged from the charging chute 60 toward the conveying surface of the conveyor belt 10 (fuel charging step).
Second, the head pulley 20 and the tail pulley 20a apply a conveyance force along the conveyance direction TD to the conveyor belt 10, and the solid fuel SF introduced onto the conveyance surface of the conveyor belt 10 is conveyed along the conveyance direction TD ( transportation process).

Thirdly, the solid fuel SF introduced onto the conveyance surface of the conveyor belt 10 is conveyed to the position of the head pulley 20 disposed on the downstream side in the conveyance direction TD, and the solid fuel SF is transferred from the conveyor belt 10 toward the head chute 70. Drop.
By repeating the above steps, the solid fuel SF dropped from the input chute 60 toward the conveying surface of the conveyor belt 10 can be transported and dropped toward the head chute 70.

[Other variations]
In the above description, the dustproof sheet 90 is attached to the belt cleaner 95, but other embodiments may be used. For example, the dustproof sheet 90 may be directly attached to the pair of side casings 84 via support struts (not shown).

The transport device described in this embodiment described above can be understood, for example, as follows.
A conveying device (100) according to the present disclosure includes a conveying belt (10) for conveying solid fuel along a conveying direction (TD), and a conveying force for conveying the conveying belt along the conveying direction (TD). a pair of rotating bodies (20) disposed at both ends in the conveying direction that apply the solid fuel to the conveying belt; and guiding the solid fuel falling from the downstream end of the conveying belt in the conveying direction downward in the vertical direction. A fuel dropping part (70), a casing part (80, 90) that accommodates the conveyor belt therein, and dust of the solid fuel guided vertically downward by the fuel dropping part flows into the inside of the casing part. a dust-proof sheet (90) formed in a sheet shape from an elastically deformable material, the casing portion being disposed below the conveyor belt in the vertical direction and extending along the conveyor belt. The fuel dropping part has a slope (71) connected to the downstream end (82a) of the lower casing in the conveying direction and extending vertically downward. The dustproof sheet is arranged downstream of the downstream end of the lower casing with respect to the conveyance direction, and the upper end of the dustproof sheet is close to the conveyor belt, and the lower end of the dustproof sheet is disposed downstream of the downstream end of the lower casing. It is arranged so as to be in contact with the inclined surface.

According to the conveyance device according to the present disclosure, the dustproof sheet formed in a sheet shape from an elastically deformable material is arranged on the downstream side of the lower casing in the solid fuel conveyance direction, and the upper end is close to the conveyance belt. The lower end is arranged to contact the inclined surface connecting to the lower casing. Since the bottom edge of the dustproof sheet is placed in contact with the slope, the dust from the solid fuel that is guided below the fuel dumping part along with the solid fuel flows backwards due to the airflow generated during the drop and is directed toward the slope. Even if the dust rises, the dust is guided inside the lower casing along the slope, and the accumulation of dust is suppressed. In addition, since the upper end of the dustproof sheet is placed close to the conveyor belt, even if the solid fuel dust led below the fuel dumping part rises to the vicinity of the conveyor belt, the dust will flow from the top of the dustproof sheet to the bottom. The dust is guided toward the inside of the casing and is prevented from accumulating. Since a large amount of dust is prevented from accumulating in the lower casing, it is possible to prevent the accumulated dust from interfering with the transport mechanism for conveying objects by the conveyor belt.

Further, according to the conveyance device according to the present disclosure, since the dustproof sheet is formed into a sheet shape from an elastically deformable material, the lower end of the dustproof sheet comes into contact with the shape of the slope, improving sealing performance. do. In addition, since the dustproof sheet is placed on the downstream side of the lower casing in the conveyance direction, the dust that comes into contact with the dustproof sheet and falls downward is guided further down along the slope and accumulates inside the lower casing. things are suppressed. As described above, according to the conveyance device according to the present disclosure, even if the conveyed article contains biomass fuel such as wood-based solid fuel that easily generates dust, the conveyed article can be stored inside the casing section that accommodates the conveyor belt. It is possible to suppress the accumulation of dust generated from

The conveying device according to the present disclosure is arranged downstream of the lower casing in the conveying direction and along the width direction (WD) of the conveying belt so as to be in contact with the conveying belt, and the conveying device A cleaning section (95) is provided for removing the solid fuel adhering to the dustproof sheet, and the upper end of the dustproof sheet is attached to the cleaning section.
According to the conveyance device according to the present disclosure, the upper end of the dustproof sheet is attached to the cleaning section that contacts the conveyance surface of the conveyance belt. Therefore, even if the solid fuel dust led below the fuel dumping part flows backwards due to the airflow generated when the fuel is dropped and rises to the vicinity of the conveyor belt, the dust will flow from above the dustproof sheet toward the inside of the lower casing. Being guided is definitely prevented.

In the conveyance device according to the present disclosure, the casing part includes an upper casing (80) that is arranged above the conveyor belt and extends along the conveyor belt, and a width direction perpendicular to the conveyance direction of the conveyor belt. a pair of side casings (84) that are arranged laterally at both ends of the conveyor belt and that are connected to the upper casing and the lower casing to form an accommodation space (SA) that accommodates the conveyor belt; In the width direction (WD), the length (L1) of the dustproof sheet is set to be 60% or more of the length (L2) between the pair of side casings.
According to the conveyance device according to the present disclosure, since the dustproof sheet is disposed in an area of 60% or more of the area between the pair of side casings on both end sides of the conveyor belt in the width direction orthogonal to the conveyance direction, the Most of the dust rising from below the dumping part can be prevented from being guided toward the lower casing.

In the conveyance device according to the present disclosure, the dustproof sheet is arranged with a gap (GP) provided between the dustproof sheet and the inner surfaces of the pair of side casings in the width direction (WD).
If a gap is not formed between the edge of the dustproof sheet and the side casing, the dustproof sheet will be displaced by the airflow because there is no gap for the airflow that flows backwards and rises with the dust when it is dropped. , Non-uniform gaps formed due to the displacement may disrupt the airflow and cause dust to flow into the lower casing through the gaps. Furthermore, the side end surface of the dustproof sheet gets caught on the inner surface of the side casing, making it impossible for the lower end of the dustproof sheet to contact the inclined surface, and dust may flow from the lower end of the dustproof sheet toward the inside of the lower casing. On the other hand, in the conveyance device according to the present disclosure, since there is a gap through which the airflow rising together with the dust flows, the dustproof sheet is suppressed from being displaced by the airflow. Further, the side end surface of the dustproof sheet is prevented from being caught on the inner surface of the side casing, thereby preventing a gap from being formed between the lower end of the dustproof sheet and the inclined surface. Therefore, it is possible to suppress dust from flowing into the lower casing.

In the conveyance device according to the present disclosure, at least a portion of the solid fuel is biomass fuel.
According to the conveyance device according to the present disclosure, even if part of the solid fuel includes biomass fuel that is particularly likely to generate dust, dust generated from the conveyed object accumulates on the casing portion that accommodates the conveyance belt. This can be suppressed.

The transport method using the transport device described in the embodiment described above can be understood, for example, as follows.
A conveying method according to the present disclosure is a conveying method using a conveying device that conveys solid fuel along a conveying direction, the conveying device including a conveying belt for conveying the solid fuel along the conveying direction, a pair of rotating bodies disposed at both ends of the conveyance direction that apply a conveyance force to the conveyance belt that causes the conveyance belt to convey along the conveyance direction; A fuel dropping part that guides the falling solid fuel vertically downward, a casing part that houses the conveyor belt therein, and dust of the solid fuel guided vertically downward by the fuel dropping part inside the casing part. a dustproof sheet formed in a sheet shape of an elastically deformable material to prevent the dust from flowing into the casing, and the casing part is arranged below the conveyor belt in the vertical direction and extends along the conveyor belt. the fuel dropping part has an inclined surface connected to the downstream end of the lower casing in the transport direction and extending vertically downward; The dustproof sheet is disposed downstream of the downstream end of the lower casing in the conveyance direction, and is disposed so that the upper end of the dustproof sheet is close to the conveyor belt and the lower end of the dustproof sheet is in contact with the inclined surface. a conveyance step of conveying the solid fuel by imparting a conveyance force to the conveyance belt that causes the pair of rotating bodies to convey the conveyance belt along the conveyance direction; A fuel dropping step of dropping the solid fuel from the downstream end of the conveying belt in the conveying direction and guiding the solid fuel downward by the fuel dropping part.

According to the conveyance method according to the present disclosure, the dustproof sheet formed in a sheet shape from an elastically deformable material is arranged downstream of the lower casing in the solid fuel conveyance direction, and the upper end is close to the conveyance belt. The lower end is arranged to contact the inclined surface connecting to the lower casing. Since the bottom edge of the dustproof sheet is placed in contact with the slope, it is assumed that the solid fuel dust guided below the fuel dumping part flows backwards due to the air current generated when the fuel is dropped and rises toward the slope. Also, dust is prevented from being guided inside the lower casing along the inclined surface. In addition, since the upper end of the dustproof sheet is placed close to the conveyor belt, even if the solid fuel dust led below the fuel dumping part rises to the vicinity of the conveyor belt, the dust will flow from the top of the dustproof sheet to the bottom. Guided toward the inside of the casing is suppressed. Since a large amount of dust is prevented from accumulating in the lower casing, it is possible to prevent the accumulated dust from interfering with the transport mechanism for conveying objects by the conveyor belt.

Further, according to the conveyance method according to the present disclosure, since the dustproof sheet is formed in a sheet shape from an elastically deformable material, the lower end of the dustproof sheet contacts along the shape of the slope, improving sealing performance. do. In addition, since the dustproof sheet is placed downstream of the lower casing in the transport direction, dust that contacts the dustproof sheet and falls downward is guided downward along the slope and accumulates inside the lower casing. is suppressed. As described above, according to the conveyance device according to the present disclosure, even if the conveyed article contains biomass fuel such as wood-based solid fuel that easily generates dust, the conveyed article can be stored inside the casing section that accommodates the conveyor belt. It is possible to suppress the accumulation of dust generated from

10 Conveyor belt (transport belt)
20 Head pulley (rotating body on the downstream side in the conveyance direction)
20a Tail pulley (rotating body on the upstream side in the conveyance direction)
21 Drive shaft 21a Driven shaft 30 Conveyor roller 35 Snub pulley 40 Skirt plate 50 Seal portion 60 Feeding chute 70 Head chute (fuel dropping portion)
71 Inclined surface 72 Vertical surface 80 Upper casing (casing part)
82 Lower casing (casing part)
82a Downstream end 84 Side casing (casing part)
90 Dustproof sheet 95 Belt cleaner (cleaning section)
95a Cleaner chip 95b Chip support section 95c Mounting column 100 Belt conveyor (conveying device)
GP Gap PD Dust SA Accommodation space SF Solid fuel TD Conveying direction WD Width direction θ Inclination angle

Claims (6)

a conveyor belt for conveying the solid fuel along the conveyance direction;
a pair of rotating bodies disposed at both ends of the conveyance direction that apply a conveyance force to the conveyance belt to convey the conveyance belt along the conveyance direction;
a fuel dropping part that guides the solid fuel falling from the downstream end of the conveyor belt in the conveyance direction downward in the vertical direction;
a casing portion that accommodates the conveyor belt therein;
a dustproof sheet formed into a sheet shape of an elastically deformable material and which prevents dust of the solid fuel guided vertically downward by the fuel dropping part from flowing into the inside of the casing part;
The casing part has a lower casing that is arranged below the conveyor belt in the vertical direction and extends along the conveyor belt,
The fuel drop part has an inclined surface connected to a downstream end of the lower casing in the transport direction and extends vertically downward;
The dustproof sheet is located downstream of the downstream end of the lower casing with respect to the conveyance direction and further than the rotary body that is disposed on the downstream side of the pair of rotary bodies in the conveyance direction. A conveyance device disposed on an upstream side so that an upper end of the dustproof sheet is close to the conveyor belt and a lower end of the dustproof sheet is in contact with the inclined surface. a conveyor belt for conveying the solid fuel along the conveyance direction;
a pair of rotating bodies disposed at both ends of the conveyance direction that apply a conveyance force to the conveyance belt to convey the conveyance belt along the conveyance direction;
a fuel drop part that guides the solid fuel falling from the downstream end of the conveyor belt in the conveyance direction downward in the vertical direction;
a casing portion that accommodates the conveyor belt therein;
a dustproof sheet formed into a sheet shape of an elastically deformable material and which prevents dust of the solid fuel guided vertically downward by the fuel dropping part from flowing into the inside of the casing part;
The casing part has a lower casing that is arranged below the conveyor belt in the vertical direction and extends along the conveyor belt,
The fuel drop part has an inclined surface connected to a downstream end of the lower casing in the transport direction and extends vertically downward;
The dustproof sheet is arranged downstream of the downstream end of the lower casing with respect to the conveyance direction, and the upper end of the dustproof sheet is close to the conveyor belt, and the lower end of the dustproof sheet is located on the inclined surface. placed in contact with
a cleaning section that is disposed on the downstream side of the lower casing in the conveyance direction and along the width direction of the conveyor belt so as to be in contact with the conveyor belt, and that removes the solid fuel attached to the conveyor belt; Equipped with
The dustproof sheet is a conveying device in which an upper end is attached to the cleaning section. The casing part is
an upper casing arranged above the conveyor belt and extending along the conveyor belt;
a pair of side parts that are arranged on both ends of the conveyor belt in a width direction orthogonal to the conveyance direction, and that are connected to the upper casing and the lower casing to form a storage space that accommodates the conveyor belt; comprising a casing;
The conveyance device according to claim 1 or 2, wherein the length of the dustproof sheet is set to be 60% or more of the length between the pair of side casings in the width direction. a conveyor belt for conveying the solid fuel along the conveyance direction;
a pair of rotating bodies disposed at both ends of the conveyance direction that apply a conveyance force to the conveyance belt to convey the conveyance belt along the conveyance direction;
a fuel drop part that guides the solid fuel falling from the downstream end of the conveyor belt in the conveyance direction downward in the vertical direction;
a casing portion that accommodates the conveyor belt therein;
a dustproof sheet formed into a sheet shape of an elastically deformable material and which prevents dust of the solid fuel guided vertically downward by the fuel dropping part from flowing into the inside of the casing part;
The casing part has a lower casing that is arranged below the conveyor belt in the vertical direction and extends along the conveyor belt,
The fuel drop part has an inclined surface connected to a downstream end of the lower casing in the transport direction and extends vertically downward;
The dustproof sheet is arranged downstream of the downstream end of the lower casing with respect to the conveyance direction, and the upper end of the dustproof sheet is close to the conveyor belt, and the lower end of the dustproof sheet is located on the inclined surface. placed in contact with
The casing part is
an upper casing arranged above the conveyor belt and extending along the conveyor belt;
a pair of side parts that are arranged on both ends of the conveyor belt in a width direction orthogonal to the conveyor direction, and that are connected to the upper casing and the lower casing to form a storage space that accommodates the conveyor belt; comprising a casing;
In the width direction, the length of the dustproof sheet is set to be 60% or more of the length between the pair of side casings,
In the conveying device, the dustproof sheet is arranged with a gap provided between the dustproof sheet and the inner surfaces of the pair of side casings in the width direction. The conveyance device according to any one of claims 1 to 4, wherein at least a portion of the solid fuel is a biomass fuel. A conveying method using a conveying device that conveys solid fuel along the conveying direction,
The transport device is
a conveyor belt for conveying the solid fuel along the conveyance direction;
a pair of rotating bodies disposed at both ends of the conveyance direction that apply a conveyance force to the conveyance belt to convey the conveyance belt along the conveyance direction;
a fuel drop part that guides the solid fuel falling from the downstream end of the conveyor belt in the conveyance direction downward in the vertical direction;
a casing portion that accommodates the conveyor belt therein;
a dustproof sheet formed into a sheet shape of an elastically deformable material and which prevents dust of the solid fuel guided vertically downward by the fuel dropping part from flowing into the inside of the casing part;
The casing part has a lower casing that is arranged below the conveyor belt in the vertical direction and extends along the conveyor belt,
The fuel drop part has an inclined surface connected to a downstream end of the lower casing in the transport direction and extends vertically downward;
The dustproof sheet is located downstream of the downstream end of the lower casing with respect to the conveyance direction and further than the rotary body that is located downstream of the pair of rotary bodies in the conveyance direction. disposed on the upstream side , the upper end of the dustproof sheet is close to the conveyor belt, and the lower end of the dustproof sheet is in contact with the inclined surface,
a conveyance step of conveying the solid fuel by applying a conveyance force to the conveyance belt that causes the pair of rotating bodies to convey the conveyance belt along the conveyance direction;
a fuel dropping step in which the solid fuel transported in the transporting step is dropped from the downstream end of the transporting belt in the transporting direction, and the solid fuel is guided downward by the fuel dropping portion;
A transportation method comprising:

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