JP7536560B2 - SOLID FUEL TRANSPORTATION DEVICE AND SOLID FUEL TRANSPORTATION METHOD - Google Patents

Description

The present disclosure relates to a solid fuel transport device and a solid fuel transport method for transporting solid fuel.

Conventionally, in thermal power plants, solid fuels such as coal and biomass fuel are temporarily stored in bunkers or silos, and the required amount is supplied to the boiler depending on the load of the plant. A coal supply system is known for storing solid fuel, in which the solid fuel is transported by a conveyor belt, the solid fuel is sorted to the side of the conveyor belt by a scraper, and the solid fuel is fed into a coal bunker located below the conveyor belt (see, for example, Patent Document 1).

The coal supply system disclosed in Patent Document 1 is a system that aims to prevent all of the coal that passes through the scraper and is carried over downstream from being sent to the most downstream coal bunker. The coal supply system disclosed in Patent Document 1 operates a second-stage scraper located downstream of the first-stage scraper that caused the carryover, making it possible to prevent all of the coal carried over by the first-stage scraper from being sent to the most downstream coal bunker.

JP 2011-251809 A

However, in the coal supply system disclosed in Patent Document 1, in the first and second stage scrapers, a small amount of coal passing through the gap between the scraper and the conveyor belt is not diverted from the conveyor belt and is supplied to the most downstream coal bunker. Therefore, if the conveyor belt is kept operating when inspecting the most downstream coal bunker or the crusher to which coal is supplied from the most downstream coal bunker, the work environment during inspection work will deteriorate over time, reducing the work efficiency and safety of workers. On the other hand, if the conveyor belt is stopped, the operating rate of the thermal power plant will decrease.

The present disclosure has been made in consideration of these circumstances, and aims to provide a solid fuel transport device and a solid fuel transport method that can properly process solid fuel transported to the most downstream position of the transport belt, and that can prevent a decrease in worker efficiency and safety caused by continuing to transport solid fuel, and a decrease in operating rate caused by stopping the transport of solid fuel.

A solid fuel transport device according to one aspect of the present disclosure includes a transport belt that transports solid fuel loaded on a transport surface along a transport direction, a pair of rotating bodies that are arranged at both ends of the transport direction and impart a transport force to the transport belt to transport the solid fuel along the transport direction, a distribution section that is arranged above the transport belt and distributes the solid fuel transported along the transport direction in a width direction perpendicular to the transport direction and causes it to fall from the transport belt, a first storage section that is arranged below the transport belt and stores the solid fuel that is distributed by the distribution section and falls from the transport belt, a cleaning section that sprays cleaning liquid onto the transport surface of the transport belt that has passed through the rotating bodies to clean the transport surface and discharges the cleaning liquid, and a fuel recovery section that recovers the entire amount of solid fuel that falls from the downstream end of the transport belt in the transport direction and leads it to the cleaning section.

A solid fuel transport method according to one aspect of the present disclosure is a method of transporting solid fuel by a solid fuel transport device, the method including: a transport step of applying a transport force to a transport belt that transports the solid fuel loaded on a transport surface along a transport direction by a rotating body arranged at an end of the transport direction, thereby transporting the solid fuel along the transport direction; a distribution step of distributing the solid fuel transported along the transport direction in a width direction perpendicular to the transport direction by a distribution section arranged above the transport belt and causing it to fall from the transport belt; a storage step of storing the solid fuel that has been distributed by the distribution step and falls from the transport belt in a first storage section; a cleaning step of spraying a cleaning liquid onto the transport surface of the transport belt that has passed the rotating body to clean the transport surface and discharging the cleaning liquid from a discharge section; and a fuel recovery step of recovering the entire amount of the solid fuel that falls from the downstream end of the transport belt in the transport direction and leading it to the discharge section.

According to the present disclosure, it is possible to provide a solid fuel transport device and a solid fuel transport method that can appropriately process solid fuel transported to the most downstream position of the transport belt, and suppress a decrease in worker efficiency and safety caused by continuing to transport solid fuel, and a decrease in operating rate caused by stopping the transport of solid fuel.

1 is a partial cross-sectional view showing a solid fuel transport device according to a first embodiment of the present disclosure. 2 is a plan view of the solid fuel transport device shown in FIG. 1 as viewed from above. 2 is a partial enlarged view of a portion A of the solid fuel transport device shown in FIG. 1 . 4 is a cross-sectional view of the solid fuel transport device shown in FIG. 3 taken along the line BB. FIG. 4 is a partial cross-sectional view showing the solid fuel transport device with the fuel recovery unit removed. FIG. 2 is a system diagram showing a separation facility for separating solid fuel. 3 is a flowchart showing a solid fuel conveying method according to the first embodiment of the present disclosure. FIG. 11 is a partial cross-sectional view showing a solid fuel transport device according to a second embodiment of the present disclosure. FIG. 9 is a partial enlarged view of a portion C of the solid fuel transport device shown in FIG. 8 . 10 is a cross-sectional view of the solid fuel transportation device shown in FIG. 9 taken along the line D-D.

First Embodiment
A solid fuel transport device 100 according to a first embodiment of the present disclosure and a solid fuel transport method using the solid fuel transport device 100 will be described below with reference to the drawings. Fig. 1 is a partial cross-sectional view showing the solid fuel transport device 100 according to this embodiment. Fig. 2 is a plan view of the solid fuel transport device 100 shown in Fig. 1, viewed from above. Fig. 3 is a partial enlarged view of part A of the solid fuel transport device 100 shown in Fig. 1. Fig. 4 is a cross-sectional view taken along the line B-B of the solid fuel transport device 100 shown in Fig. 3. Fig. 5 is a partial cross-sectional view showing the solid fuel transport device 100 with the fuel recovery unit 80 removed.

In the following explanation, "upper" refers to the vertically upward direction, and "upper" in terms such as upper part and top surface refers to the vertically upward part. Similarly, "lower" refers to the vertically downward part, and the vertical direction is not precise and may include some error.

The solid fuel transport device 100 of this embodiment is a device that transports solid fuel SF, such as coal or biomass fuel, supplied from a fuel storage site (not shown) and drops it into a fuel bunker 40. The solid fuel SF dropped into the fuel bunker 40 is supplied to a pulverizer (not shown) that pulverizes the solid fuel SF to generate pulverized fuel. The pulverized fuel generated by the pulverizer is supplied to the boiler of the power plant and used as fuel.

As shown in FIG. 1, the solid fuel transport device 100 of this embodiment includes a conveyor belt (transport belt) 10, a head pulley (rotating body on the downstream side in the transport direction) 21, a tail pulley (rotating body on the upstream side in the transport direction) 22, a scraper (distributing section) 30, a switching mechanism 35, a fuel bunker (first storage section) 40, a fuel bunker (second storage section) 50, a cleaning section 60, a head chute (fuel injection section) 70, and a fuel recovery section 80.

The conveyor belt 10 is a band-shaped belt that transports the solid fuel SF loaded on the transport surface 11 along the transport direction TD (e.g., horizontal direction). The conveyor belt 10 is looped around a head pulley 21 and a tail pulley 22 that are arranged at both ends in the transport direction TD. The conveyor belt 10 is made of, for example, natural rubber or synthetic rubber.

The head pulley 21 and tail pulley 22 are disposed at both ends of the conveying direction TD, and provide a conveying force to the conveyor belt 10 to convey the conveyor belt 10 along the conveying direction TD. In FIG. 1, the head pulley 21, disposed downstream of the conveying direction TD, is provided with a driving force by a drive motor (not shown) to rotate about the drive shaft 21a, and moves the conveyor belt 10 along the conveying direction TD.

The scraper 30 is a device that is disposed above the conveyor belt 10 and separates the solid fuel SF transported along the transport direction TD into a width direction WD perpendicular to the transport direction TD, causing the solid fuel SF to fall from the conveyor belt 10. As shown in FIG. 1, the scraper 30 has a predetermined height H1 in the height direction perpendicular to the transport direction TD. The height H1 is set so that the solid fuel SF cannot easily overcome the scraper 30 due to the solid fuel SF rising up due to accumulation when being distributed.

As shown in FIG. 2, the scraper 30 has a predetermined width W1 in a width direction WD perpendicular to the conveying direction TD. The width W1 gradually increases from the upstream side to the downstream side in the conveying direction TD, and is set to be equal to or greater than the width of the conveyor belt 10 at the downstream end. Therefore, the scraper 30 distributes the solid fuel SF conveyed by the conveyor belt 10 in the conveying direction TD to the side of the conveyor belt 10 along the width direction WD, causing it to fall from the conveyor belt 10.

As shown in Figures 1 and 2, the scrapers 30 are arranged at four locations in the order of scraper 30A, scraper 30B, scraper 30C, and scraper 30D from the upstream side to the downstream side of the conveying direction TD. The scrapers 30 are arranged in a number corresponding to the number of fuel bunkers 40.

The switching mechanism 35 is a mechanism that switches between a distribution state in which the solid fuel SF transported by the conveyor belt 10 is distributed by the scraper 30, and a transport state in which the solid fuel SF transported by the conveyor belt 10 moves in the transport direction TD without being distributed by the scraper 30. The switching mechanism 35 pushes the conveyor belt 10 from below to above, bringing the transport surface 11 close to the scraper 30, thereby bringing the solid fuel SF into a distribution state in which it is distributed by the scraper 30.

When the switching mechanism 35 is in the distribution state, it brings the conveying surface 11 of the conveyor belt 10 close to the scraper 30, but a small gap is formed between the conveying surface 11 and the scraper 30 to prevent wear and damage to the conveyor belt 10 and scraper 30 due to contact and to suppress an increase in the power consumption of the drive motor due to friction. Therefore, solid fuel SF with a diameter smaller than the gap formed between the conveying surface 11 and the scraper 30 is not distributed by the scraper 30 and is transported downstream in the conveying direction TD.

As shown in FIG. 1, the switching mechanisms 35 are arranged at four locations in the order of switching mechanism 35A, switching mechanism 35B, switching mechanism 35C, and switching mechanism 35D from the upstream side to the downstream side of the conveying direction TD. The number of switching mechanisms 35 corresponds to the number of scrapers 30.

When the switching mechanism 35A is positioned as shown by the solid line in FIG. 1, it transports the solid fuel SF downstream in the transport direction TD without sorting it using the scraper 30A. On the other hand, when the switching mechanism 35A is positioned as shown by the dashed line in FIG. 1, it sorts the solid fuel SF using the scraper 30A and drops it toward the fuel bunker 40A.

Each of the switching mechanisms 35B, 35C, and 35D has the same function as the switching mechanism 35A. In the example shown in FIG. 1, the switching mechanisms 35B and 35D are positioned as shown by the solid lines, and transport the solid fuel SF downstream in the transport direction TD without sorting it using the scraper 30. On the other hand, the switching mechanism 35C is positioned as shown by the solid lines, and sorts the solid fuel SF using the scraper 30C and drops it toward the fuel bunker 40C.

As shown in FIG. 5, when switching mechanism 35A, switching mechanism 35B, switching mechanism 35C, and switching mechanism 35D are all separated from scraper 30 and in a conveying state, all of the solid fuel SF transported by conveyor belt 10 is dropped into fuel bunker 50 via head chute 70 from the downstream end of conveyor belt 10 in the conveying direction TD. When all of the solid fuel SF transported by conveyor belt 10 is dropped into fuel bunker 50, fuel recovery section 80 is removed from head chute 70.

The fuel bunker 40 is disposed below the conveyor belt 10 and stores the solid fuel SF that is sorted by the scraper 30 and falls from the conveyor belt 10. The solid fuel SF stored in the fuel bunker 40 is supplied to a pulverizer (not shown) that pulverizes the solid fuel SF to generate pulverized fuel using a supply mechanism (not shown). As shown in FIG. 1, the fuel bunker 40A is disposed below the scraper 30A, the fuel bunker 40B is disposed below the scraper 30B, the fuel bunker 40C is disposed below the scraper 30C, and the fuel bunker 40D is disposed below the scraper 30D.

When the fuel recovery section 80 is removed (as shown in FIG. 5), the fuel bunker 50 stores the solid fuel SF that falls from the downstream end of the conveyor belt 10 in the transport direction TD and is guided by the head chute 70. The solid fuel SF stored in the fuel bunker 50 is supplied to a pulverizer (not shown) using a supply mechanism (not shown) that pulverizes the solid fuel SF to produce pulverized fuel.

The cleaning unit 60 is a device that sprays cleaning liquid CS (e.g., water) onto the conveying surface 11 of the conveyor belt 10 that has passed the head pulley 21 to clean the conveying surface 11. As shown in FIG. 3, the cleaning unit 60 has multiple spray units 61, a casing 62, and a discharge unit 63. The cleaning unit 60 sprays cleaning liquid CS from the multiple spray units 61 toward the conveying surface 11 to remove residual solid fuel SF adhering to the conveying surface 11. The cleaning liquid CS that has cleaned the conveying surface 11 is contained in the casing 62 and is guided to the separation equipment 90 described below via the discharge unit 63 provided below the casing 62.

The head chute 70 is a housing that guides downward the solid fuel SF that falls from the downstream end of the conveyor belt 10 in the transport direction TD. As shown in FIG. 5, when the fuel recovery section 80 is removed from the head chute 70, the head chute 70 guides the solid fuel SF to the fuel bunker 50.

The fuel recovery section 80 is a device that recovers the solid fuel SF that falls from the conveyor belt 10 passing through the head pulley 21 and guides it to the cleaning section 60. In this embodiment, the fuel recovery section 80 is detachably attached to the head chute 70. As shown in Figures 3 and 4, the fuel recovery section 80 has an inclined plate (fuel transport section) 81, a support member 82, a support member 83, and a discharge section 84.

As shown in Figures 3 and 4, the inclined plate 81 is a plate-shaped member that guides the solid fuel SF that falls from the downstream end of the conveyor belt 10 in the conveying direction TD to the discharge section 63 of the cleaning section 60. The inclined plate 81 has an inclined surface 81a that guides the solid fuel SF to the discharge section 63 of the cleaning section 60. As shown in Figure 3, the inclined surface 81a is inclined downward so that the solid fuel SF is guided from the head chute 70 toward the cleaning section 60.

The support member 82 is a member that is attached to the inner wall 71 that the head chute 70 has and that extends in the vertical direction. The support member 83 is a member that is attached to the inner wall 72 that the head chute 70 has and that extends in the vertical direction. The inner walls 71 and 72 are a pair of walls that are arranged opposite each other. The support members 82 and 83 are attached to the inner walls 71 and 72, for example, by fastening bolts (not shown).

As shown in FIG. 4, the support member 82 is an L-shaped member in cross section formed to protrude from the inner wall 71, and the support member 83 is an L-shaped member in cross section formed to protrude from the inner wall 72. The support members 82 and 83 are members that support both ends of the inclined plate 81 in the width direction WD.

The inclined plate 81 has a locking member 81b that is locked to the support member 82 and a locking member 81c that is locked to the support member 83. As shown in FIG. 4, the inclined surface 81a is formed to be positioned at a position Z2 below the position Z1 at which the pair of locking members 81b, 81c are locked to the pair of support members 82, 83 on the axis Z that extends vertically. In other words, the inclined plate 81 has a shape that is recessed downward relative to the pair of support members 82, 83.

As shown in FIG. 4, the pair of locking members 81b, 81c of the inclined plate 81 are locked to a pair of support members 82, 83 arranged below. Therefore, the inclined plate 81 is attached to the head chute 70 without using any member for fastening the inclined plate 81 to the pair of support members 82, 83. Because the inclined plate 81 is not fastened to the pair of support members 82, 83, the inclined plate 81 can be easily attached to the head chute 70 and easily removed from the head chute 70.

For example, when an operator operating the solid fuel transport device 100 is performing an inspection operation to check the inside of the fuel bunker 50, the operator attaches an inclined plate 81 to the head chute 70. This prevents the solid fuel SF from being supplied to the fuel bunker 50 even if the solid fuel SF is transported by the conveyor belt 10 during an inspection operation to check the inside of the fuel bunker 50. The solid fuel SF that falls from the conveyor belt 10 is guided by the inclined plate 81 of the fuel recovery section 80 to the discharge section 63 of the cleaning section 60.

The discharge unit 84 is a device that discharges liquid LQ (e.g., water) to transport the solid fuel SF loaded on the inclined surface 81a toward the cleaning unit 60. The discharge unit 84 discharges liquid LQ in a direction along the inclined surface 81a so that the solid fuel SF is guided along the inclined surface 81a to the discharge unit 63 of the cleaning unit 60.

Next, the separation equipment 90 provided in the solid fuel transport device 100 of this embodiment will be described. FIG. 6 is a system diagram showing the separation equipment 90 that separates solid fuel. The separation equipment 90 is equipment that separates solid fuel SF from the cleaning liquid CS discharged from the discharge section of the cleaning section 60. As shown in FIG. 6, the separation equipment 90 has a cleaning treatment water tank 91, a cleaning water supply pump 92, a drainage pit 93, a drainage pump 94, a flocculation tank 95, a settling tank 96, and a slurry transfer pump 97.

The separation equipment 90 supplies the cleaning solution CS stored in the cleaning treatment water tank 91 to the cleaning section 60 by the cleaning water supply pump 92. After cleaning the conveyor belt 10 in the cleaning section 60, the cleaning solution CS containing the solid fuel SF is led to a drainage pit 93. The cleaning solution CS containing the solid fuel SF stored in the drainage pit 93 is supplied to the coagulation tank 95 by the drainage pump 94.

The coagulation tank 95 stores a chemical solution that coagulates the solid fuel SF. The solid fuel SF contained in the cleaning liquid CS supplied to the coagulation tank 95 coagulates, and the cleaning liquid CS containing the coagulated solid fuel SF is supplied to the settling tank 96. The settling tank 96 causes the solid fuel SF contained in the cleaning liquid CS to settle downward. The solid fuel SF that has settled to the bottom of the settling tank 96 and turned into a slurry is transferred by the slurry transfer pump 97.

The solid fuel SF transferred by the slurry transfer pump 97 is transferred, for example, to equipment (not shown) that supplies the solid fuel SF to the conveyor belt 10. In this way, the separation equipment 90 of this embodiment can properly recover the solid fuel SF contained in the cleaning liquid CS and supply it again to the solid fuel transport device 100. In addition, the cleaning liquid CS separated from the solid fuel SF is supplied from the settling tank 96 to the cleaning treatment water tank 91, and then supplied again from the cleaning treatment water tank 91 to the cleaning section 60.

Next, a description will be given of a solid fuel transport method using the solid fuel transport device 100 of this embodiment. Fig. 7 is a flowchart showing the solid fuel transport method according to this embodiment.
In step S101 (conveying step), a conveying force is applied to the conveyor belt 10 by the head pulley 21 arranged at the end of the conveyor belt 10 in the conveying direction TD, causing the conveyor belt 10 to convey the solid fuel SF along the conveying direction TD.

In step S102 (sorting process), the switching mechanism 35 raises the conveyor belt 10 and brings it close to the scraper 30 arranged above the conveyor belt 10. The solid fuel SF transported by the conveyor belt 10 along the transport direction TD is sorted by the scraper 30 into the width direction WD perpendicular to the transport direction TD and falls from the conveyor belt 10.

In step S103 (storage process), the solid fuel SF that is sorted in the sorting process (S102) and falls from the conveyor belt 10 is stored in the fuel bunker 40.

In step S104 (cleaning process), the spray unit 61 sprays cleaning liquid CS onto the conveying surface 11 of the conveyor belt 10 that has passed the head pulley 21 to clean the conveying surface 11, and the cleaning liquid CS is discharged from the discharge unit 63 of the cleaning unit 60.

In step S105 (fuel recovery process), the solid fuel SF that falls from the conveyor belt 10 passing through the head pulley 21 is recovered and guided to the discharge section 63. The above flow is executed continuously to carry out the solid fuel transport method of this embodiment.

The actions and effects achieved by the solid fuel transportation device 100 of the present embodiment described above will be described.
According to the solid fuel transport device 100 of this embodiment, the solid fuel SF loaded on the transport surface 11 of the conveyor belt 10 to which a transport force is applied by the head pulley 21 and the tail pulley 22 is transported along the transport direction TD and sorted in the width direction WD by the scraper 30. The solid fuel SF sorted by the scraper 30 falls from the conveyor belt 10 and is stored in a fuel bunker 40 disposed below the conveyor belt 10. A small amount of solid fuel SF that is not sorted by the scraper 30 and passes through the gap between the scraper 30 and the conveyor belt 10 is transported to the most downstream side of the conveyor belt 10.

The solid fuel SF transported to the most downstream position of the conveyor belt 10 falls below the conveyor belt 10 and is collected in the fuel recovery section 80, and is guided to the cleaning section 60, which sprays cleaning liquid CS onto the conveying surface 11 of the conveyor belt 10 that has passed the head pulley 21. The solid fuel SF guided from the fuel recovery section 80 to the cleaning section 60 is discharged from the discharge section 63 of the cleaning section 60 together with the cleaning liquid CS that has cleaned the conveying surface 11.

In this way, according to the solid fuel transport device 100 of this embodiment, while maintaining the transport of solid fuel SF by the conveyor belt 10, the solid fuel SF transported to the most downstream side of the conveyor belt 10 can be guided to the cleaning section 60 and appropriately treated. Therefore, it is possible to suppress the decrease in worker work efficiency and safety caused by continuing to maintain the transport of solid fuel SF, and the decrease in operating efficiency caused by stopping the transport of solid fuel SF.

According to the solid fuel transport device 100 of this embodiment, when the fuel bunker 50 is inspected, the inclined plate 81 is attached to the fuel recovery section 80, and the solid fuel SF that falls from the downstream end of the conveyor belt 10 in the transport direction TD can be guided along the inclined surface 81a to the cleaning section 60. Also, when the fuel bunker 50 is used without inspection, the inclined plate 81 can be removed from the fuel recovery section 80, and the solid fuel SF that falls from the downstream end of the conveyor belt 10 in the transport direction TD can be guided downward by the head chute 70 and stored in the fuel bunker 50.

According to the solid fuel transport device 100 of this embodiment, the inclined plate 81 can be attached to the fuel recovery section 80 by engaging a pair of locking members 81b, 81c of the inclined plate 81 with a pair of support members 82, 83 attached to a pair of inner walls 71, 72 of the head chute 70. In addition, the inclined surface 81a of the inclined plate 81 is positioned at position Z2 below position Z1 at which the pair of locking members 81b, 81c are locked to the pair of support members 82, 83. Therefore, when the solid fuel SF is guided to the cleaning section 60, the intrusion of the solid fuel SF between the pair of locking members 81b, 81c and the pair of support members 82, 83 is suppressed.

According to the solid fuel transport device 100 of this embodiment, by discharging liquid from the discharge section 84, the solid fuel SF loaded on the inclined surface 81a can be guided to the cleaning section 60 together with the liquid. In addition, the inclined surface 81a formed on the inclined plate 81 is positioned at position Z2 below position Z1 where the pair of locking members 81b, 81c are locked to the pair of support members 82, 83. Therefore, the liquid discharged from the discharge section 84 is prevented from entering between the pair of locking members 81b, 81c and the pair of support members 82, 83 and being guided to the fuel bunker 50.

Second Embodiment
Next, a solid fuel conveying device 100A according to a second embodiment of the present disclosure will be described. This embodiment is a modified example of the first embodiment, and is the same as the first embodiment except as otherwise specifically described below, and therefore the description thereof will be omitted.

The solid fuel transport device 100 of the first embodiment has a fuel bunker 50 that stores solid fuel SF that falls from the end of the conveyor belt 10 in the transport direction TD, and the inclined plate 81 of the fuel recovery section 80 is detachably attached to the head chute 70. In contrast, the solid fuel transport device 100A of this embodiment does not have a fuel bunker 50 that stores solid fuel SF that falls from the end of the conveyor belt 10 in the transport direction TD. In addition, the solid fuel transport device 100A of this embodiment has an inclined plate 81A of the fuel recovery section 80 that cannot be detached from the head chute 70A, and the inclined plate 81A is formed integrally with the head chute 70.

Figure 8 is a partial cross-sectional view showing a solid fuel transport device 100A according to this embodiment. Figure 9 is a partial enlarged view of part C of the solid fuel transport device 100A shown in Figure 8. Figure 10 is a cross-sectional view taken along the line D-D of the solid fuel transport device 100A shown in Figure 9.

As shown in FIG. 8, the solid fuel transport device 100A of this embodiment does not have a fuel bunker 50 that stores solid fuel SF that falls from the end of the conveyor belt 10 in the transport direction TD. Also, as shown in FIG. 9 and FIG. 10, the solid fuel transport device 100A of this embodiment has an inclined plate 81A formed integrally with the head chute 70A.

The head chute 70A of this embodiment differs from the head chute 70 of the first embodiment in that it does not guide the solid fuel SF to the fuel bunker 50. The head chute 70A of this embodiment also differs from the head chute 70 of the first embodiment in that it is formed integrally with the inclined plate 81A.

Furthermore, the fuel recovery section 80A of this embodiment differs from the fuel recovery section 80 of the first embodiment in that the inclined plate 81A is not detachable from the head chute 70A, but is formed integrally with the head chute 70A.

This embodiment is effective, for example, when construction work is performed to lengthen the length of the conveyor belt 10 along the transport direction TD and extend the solid fuel transport device 100A downstream in the transport direction TD. When construction work is performed to extend the solid fuel transport device 100A, the position of the head pulley 21 will be positioned further downstream in the transport direction TD than the position shown in Figure 8. In other words, the position of the head pulley 21 before the announcement shown in Figure 8 is not the position where the head pulley 21 will be positioned when the construction work is completed, nor is it the position of the downstream end in the transport direction TD.

In this embodiment, the head pulley 21 is placed in the position shown in FIG. 8 as a temporary state before the construction work to extend the solid fuel transport device 100A is completed, and a fuel bunker 50 for storing solid fuel SF that falls from the end of the conveyor belt 10 in the transport direction TD is not provided. Furthermore, if the head pulley 21 is placed in the position shown in FIG. 8, the fuel bunker 50 does not exist below the end of the conveyor belt 10 in the transport direction TD. Since it is necessary to constantly collect the solid fuel SF that falls from the end in the transport direction TD, an inclined plate 81A that guides the solid fuel SF to the cleaning section 60 is formed integrally with the head chute 70A.

According to this embodiment, even in a provisional state before the construction work to extend the solid fuel transport device 100A is completed, it is possible to guide the solid fuel SF that falls from the end of the conveyor belt 10 in the transport direction TD to the cleaning section 60 and collect it. In addition, when carrying out the construction work to extend the solid fuel transport device 100A, there is no need to install a scraper 30 or a switching mechanism 35 at the end position of the conveyor belt 10 in the transport direction TD shown in FIG. 8, so the number of construction steps can be reduced.

The solid fuel transport device according to the present embodiment described above can be understood, for example, as follows.
A solid fuel transport device (100) according to the present disclosure includes a transport belt (10) that transports solid fuel loaded on a transport surface (11) along a transport direction (TD), a pair of rotating bodies (21, 22) that are arranged at both ends of the transport direction and apply a transport force to the transport belt to transport the solid fuel along the transport direction, a distribution section (30) that is arranged above the transport belt and distributes the solid fuel transported along the transport direction into a width direction (WD) perpendicular to the transport direction and causes it to fall from the transport belt, a first storage section (40) that is arranged below the transport belt and stores the solid fuel that is distributed by the distribution section and falls from the transport belt, a cleaning section (60) that sprays a cleaning liquid onto the transport surface of the transport belt that has passed through the rotating bodies to clean the transport surface and discharges the cleaning liquid, and a fuel recovery section (80) that recovers the solid fuel that falls from the downstream end of the transport belt in the transport direction and leads it to the cleaning section.

According to the solid fuel transport device of the present disclosure, solid fuel loaded on the transport surface of the transport belt to which a transport force is applied by a pair of rotating bodies is transported along the transport direction and is sorted in the width direction by the sorting section. The solid fuel sorted by the sorting section falls from the transport belt and is stored in a first storage section disposed below the transport belt. A small amount of solid fuel that is not sorted by the sorting section and passes through the gap between the sorting section and the transport belt is transported to the most downstream side of the transport belt.

The solid fuel transported to the most downstream position of the conveyor belt falls below the conveyor belt and is collected in the fuel recovery section, and is then guided to a cleaning section that sprays cleaning liquid onto the conveyor surface of the conveyor belt that has passed the rotating body. The solid fuel guided from the fuel recovery section to the cleaning section is discharged together with the cleaning liquid that has cleaned the conveyor surface.

In this way, the solid fuel transport device according to the present disclosure can guide the solid fuel transported to the most downstream part of the transport belt to the cleaning section and properly process it while maintaining the transport of the solid fuel by the transport belt. This makes it possible to suppress the decrease in worker efficiency and safety caused by continuing to transport the solid fuel, and the decrease in operating rate caused by stopping the transport of the solid fuel.

The solid fuel transport device according to the present disclosure includes a fuel drop section (70) that guides the solid fuel dropping from the downstream end of the transport belt in the transport direction downward, and a second storage section (50) that is disposed below the fuel drop section and that stores the solid fuel guided from the fuel drop section, and the fuel recovery section may be configured to have a fuel transport section (81) that is detachably attached to the fuel drop section and has an inclined surface (81a) that guides the solid fuel dropping from the downstream end of the transport belt in the transport direction to the cleaning section.

With the solid fuel transport device of this configuration, when the second storage section is to be inspected, the fuel transport section can be attached to the fuel recovery section, and the solid fuel that falls from the downstream end of the transport belt in the transport direction can be guided along the inclined surface to the cleaning section. Also, when the second storage section is to be used without inspection, the fuel transport section can be removed from the fuel recovery section, and the solid fuel that falls from the downstream end of the transport belt in the transport direction can be guided downward by the fuel drop section and stored in the second storage section.

In the solid fuel transport device of the above configuration, the fuel recovery section has a pair of support members (82, 83) that are attached to a pair of inner walls (71, 72) of the fuel insertion section and protrude from the inner walls to support the fuel transport section, and the fuel transport section is a plate-shaped member that has a pair of locking members (81b, 81c) that are engaged with the pair of support members and has the inclined surface, and may be configured so that the inclined surface is positioned lower than the position where the pair of locking members are engaged with the pair of support members.

According to the solid fuel transport device of this configuration, the fuel transport unit can be attached to the fuel recovery unit by engaging a pair of locking members of the fuel transport unit with a pair of support members attached to a pair of inner walls of the fuel drop unit. In addition, the inclined surface of the inclined plate is positioned below the position where the pair of locking members are locked to the pair of support members. This prevents solid fuel from entering between the pair of locking members and the pair of support members.

In the solid fuel transport device having the above configuration, the fuel recovery section may have a discharge section (84) that discharges a liquid for transporting the solid fuel loaded on the inclined surface toward the cleaning section.
According to the solid fuel transport device of this configuration, the solid fuel loaded on the inclined surface can be guided to the cleaning section together with the liquid by discharging the liquid from the discharge section. Also, the inclined surface formed on the inclined plate is positioned at a position lower than the position where the pair of locking members are locked to the pair of support members. Therefore, the liquid discharged from the discharge section is prevented from entering between the pair of locking members and the pair of support members and being guided to the second storage section.

The solid fuel transfer device according to the present disclosure may be configured to include a separation device that separates the solid fuel from the cleaning liquid discharged from the cleaning section.
According to the solid fuel transport device having the above configuration, since it is provided with a separation facility for separating the solid fuel from the cleaning liquid, the solid fuel that is not accommodated in the first accommodation section can be effectively utilized without being discarded.

The solid fuel transport method according to the embodiment described above can be understood, for example, as follows.
A solid fuel transport method according to the present disclosure is a method of transporting solid fuel by a solid fuel transport device, and includes a transport step (S101) of applying a transport force to a transport belt that transports the solid fuel loaded on a transport surface along a transport direction by a rotating body arranged at an end of the transport direction, thereby transporting the solid fuel along the transport direction; a distribution step (S102) of distributing the solid fuel transported along the transport direction by a distribution section arranged above the transport belt in a width direction perpendicular to the transport direction and causing it to fall from the transport belt; a storage step (S103) of storing the solid fuel that has been distributed by the distribution step and fallen from the transport belt in a first storage section; a cleaning step (S104) of spraying a cleaning liquid onto the transport surface of the transport belt that has passed the rotating body to clean the transport surface and discharging the cleaning liquid from a discharge section; and a fuel recovery step (S105) of recovering the solid fuel that falls from the downstream end of the transport belt in the transport direction and guiding it to the discharge section.

According to the solid fuel transport method of the present disclosure, solid fuel loaded on the transport surface of a transport belt to which a transport force is applied by a pair of rotating bodies is transported along the transport direction in the transport step, and is sorted in the width direction in the sorting step. The solid fuel sorted in the sorting step falls from the transport belt and is stored in a first storage section disposed below the transport belt in the storage step. A small amount of solid fuel that is not sorted in the sorting step and passes through the gap between the sorting section and the transport belt is transported to the most downstream side of the transport belt.

In the cleaning process, the conveying surface of the conveyor belt is cleaned, and the cleaning liquid is discharged from the discharge section. The solid fuel that falls from the conveyor belt as it passes through the rotating body is collected in the fuel collection process, guided to the discharge section that discharges the cleaning liquid, and discharged together with the cleaning liquid.

In this way, according to the solid fuel transport method of the present disclosure, while the transport of solid fuel by the transport belt is being maintained, the solid fuel transported to the most downstream part of the transport belt can be guided to the discharge section and appropriately processed. Therefore, it is possible to suppress the decrease in worker efficiency and safety caused by continuing to transport the solid fuel, and the decrease in operating rate caused by stopping the transport of the solid fuel.

10 Conveyor belt (transport belt)
11: conveying surface 21: head pulley (rotating body on the downstream side in the conveying direction)
21a Drive shaft 22 Tail pulley (rotating body on the upstream side in the conveying direction)
30, 30A, 30B, 30C, 30D scraper (distribution part)
35, 35A, 35B, 35C, 35D Switching mechanism 40, 40A, 40B, 40C, 40D Fuel bunker (first storage section)
50 Fuel bunker (second storage section)
60 Cleaning section 61 Injection section 62 Casing 63 Discharge section 70, 70A Head chute 71, 72 Inner wall 80, 80A Fuel recovery section 81, 81A Inclined plate (fuel transport section)
81a Inclined surfaces 81b, 81c Locking members 82, 83 Support member 84 Discharge section 90 Separation equipment 100, 100A Solid fuel conveying device CS Cleaning liquid LQ Liquid SF Solid fuel TD Conveying direction WD Width direction Z Axis

Claims (7)

a conveyor belt that conveys the solid fuel loaded on a conveying surface along a conveying direction;
a pair of rotating bodies disposed at both ends in the conveying direction and configured to apply a conveying force to the conveying belt for conveying the solid fuel along the conveying direction;
a sorting unit that is disposed above the conveyor belt and sorts the solid fuel conveyed along the conveying direction in a width direction perpendicular to the conveying direction, and drops the solid fuel from the conveyor belt;
a first container that is disposed below the conveyor belt and that contains the solid fuel that is sorted by the sorting unit and falls from the conveyor belt;
a cleaning unit that sprays a cleaning liquid onto the conveying surface of the conveyor belt that has passed the rotating body to clean the conveying surface, and then discharges the cleaning liquid;
a fuel recovery section that recovers all of the solid fuel dropping from a downstream end of the conveyor belt in the conveying direction and guides the solid fuel to the cleaning section. a fuel dropping section for guiding the solid fuel dropping from a downstream end of the conveyor belt in the conveying direction downward;
a second storage section that is disposed below the fuel drop section and that stores the solid fuel guided from the fuel drop section;
A solid fuel transport device as described in claim 1, wherein the fuel recovery section has a fuel transport section that is detachably attached to the fuel dropping section and has an inclined surface formed therein to guide the solid fuel falling from the downstream end of the transport belt in the transport direction to the cleaning section. the fuel recovery section has a pair of support members attached to a pair of inner walls of the fuel throwing section and protruding from the inner walls to support the fuel transport section,
The solid fuel transport device of claim 2, wherein the fuel transport section is a plate-shaped member having a pair of engaging members that engage with the pair of support members and has the inclined surface, and is formed so that the inclined surface is positioned at a position lower than the position at which the pair of engaging members are engaged with the pair of support members. The solid fuel transport device according to claim 3, wherein the fuel recovery unit has a discharge unit that discharges liquid to transport the solid fuel loaded on the inclined surface toward the cleaning unit. The solid fuel transport device according to any one of claims 1 to 4, further comprising a separation device for separating the solid fuel from the cleaning liquid discharged from the cleaning section. A solid fuel transport method for transporting solid fuel by a solid fuel transport device, comprising the steps of:
a conveying step of applying a conveying force to a conveyor belt that conveys the solid fuel loaded on a conveying surface along a conveying direction by a rotating body disposed at an end of the conveying direction, thereby conveying the solid fuel along the conveying direction;
a sorting step in which the solid fuel transported along the transport direction is sorted in a width direction perpendicular to the transport direction by a sorting unit disposed above the transport belt, and the solid fuel is dropped from the transport belt;
a storage step of storing the solid fuel sorted in the sorting step and dropping from the conveyor belt in a first storage unit;
a cleaning step of spraying a cleaning liquid onto the conveying surface of the conveyor belt that has passed the rotating body to clean the conveying surface, and discharging the cleaning liquid from a discharge portion;
a fuel recovery step of recovering all of the solid fuel dropping from a downstream end of the conveyor belt in the conveying direction and guiding the solid fuel to the discharge section. The solid fuel transport device includes:
a cleaning unit that sprays the cleaning liquid onto the transport surface to clean the transport surface;
a fuel recovery section for recovering the solid fuel dropping from a downstream end of the conveyor belt in the conveying direction and guiding the solid fuel to the cleaning section;
a fuel dropping section for guiding the solid fuel dropping from a downstream end of the conveyor belt in the conveying direction downward;
a second storage section that is disposed below the fuel drop section and that stores the solid fuel guided from the fuel drop section;
the fuel recovery section has a fuel transport section that is detachably attached to the fuel input section and has an inclined surface formed therein for guiding the solid fuel dropping from a downstream end of the transport belt in the transport direction to the cleaning section,
7. The solid fuel transport method according to claim 6, wherein the fuel collecting step collects the solid fuel dropping from a downstream end of the transport belt in the transport direction by the fuel transport section and guides the solid fuel to the discharge section.

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