JP6897414B2 - Solid fuel drying device and drying method, and solid material drying device - Google Patents

Description

The present invention relates to a drying device for drying the solid fuel stored inside the container, a method for drying the solid fuel, and a drying device for drying the solid material stored inside the container.

In recent years, with _{the reduction of CO 2} emissions, the demand for alternative fuels for fossil fuels, and the increasing demand for waste treatment, volume-reduced solid fuels (hereinafter simply referred to as "solid fuels") have been reduced in volume and solidified. .) Is under development. In addition, in response to the trend of electricity liberalization, it has become possible for businesses to sell electricity generated at factories, etc., so solid fuel is drawing attention as a recycled fuel for operating boilers for power generation. There is.

For example, solid fuels produced from organic combustibles such as plastics, papers, woods, fibers, sludge, and garbage are used for power generation, drying, heating, and the like. Among them, RPF (Recycle Plastic fuel), which is mainly made of plastics, has a larger calorific value than other solid fuels and is more economical than fossil fuels, so its use is being promoted.

The RPF is manufactured through a molding process in which the recovered plastic raw material is crushed as necessary, the iron content is separated, and then the plastic raw material is kneaded and compressed using a compression molding device (also referred to as a volume reducing solidifying machine). (See, for example, Patent Documents 1 and 2). After molding, the RPF molded product is further dried if necessary.

Special Fair 5-76986 Gazette Japanese Unexamined Patent Publication No. 2013-31945

If the amount of water contained in the solid fuel is large, the combustion efficiency is lowered, so that the amount of water in the solid fuel is required to be a certain amount or less. For example, JIS7311: 2010 "Waste-derived solidified fuel (RPF) such as paper and plastic" stipulates that the mass fraction of water is 5% or less.

RPF may be produced from plastics collected together with used paper as a raw material. In this case, since water is used in the step of separating the used paper and the plastics, the molded product obtained through the molding step by the compression molding apparatus contains a large amount of water. In order to obtain an RPF having a desired water content from such a wet solid material, a drying step for reducing the water content in the molded product is required after the molding step.

In this molding step and drying step, from the viewpoint of handleability of the molded product, usually, the molded product produced by the compression molding apparatus is put into a container container having an open upper part, and the molded product stored in the container container is placed in a container. Transport the entire container. Then, the molded product is naturally dried by leaving it in a state of being stored in the container container. However, since it takes a long time to reduce the water content only by natural drying, shortening the drying period is an issue. In order to shorten the drying period, an attempt has been made to blow air to the outer wall surface of the container container by using a container container having a mesh-like ventilated outer wall surface. In this case, the molded product near the outer wall surface of the container is blown to promote drying. However, since the molded product existing at the position inside the container container has little effect of promoting drying by blowing air, it cannot be said that the drying period of the entire molded product contained in the container container is sufficiently shortened.

This case was devised in view of the above-mentioned problems, and one of the purposes is to provide a solid fuel drying device and a drying method capable of shortening the drying period of solid fuel. Another object of the present invention is to provide a solid matter drying apparatus capable of shortening the drying period of a wet solid matter.

That is, here, various specific aspects shown below are provided.
[1] The container has a breathable outer wall that forms an internal space capable of storing solid fuel, and has an introduction port for introducing air into the internal space on the side surface of the outer wall. in the internal space, and a housing section for housing said solid fuel, said being connected to the inlet port, and a ventilation passage is formed as a flow path of the blast flowing through the inner space, the inner space , together with partitioning the internal space into said air passage and the accommodating portion, the blower is provided breathable bulkhead plate that can pass through, at least the side surface portion of the outer wall is meshed, from the inlet port the outer wall located ahead of the introduced direction of introduction of the blowing, characterized that you have air-impermeable back plate is provided to prevent the passage of the air blowing, the solid fuel drying apparatus.

[2] a bottom portion of the outer wall is also meshed, said air passage is formed in contact with the front Symbol bottom surface portion, at a position in contact with the bottom portion and the air passage, the air-impermeable to prevent the passage of the air blowing The solid fuel drying device according to [1], which is provided with the bottom plate of the above.
[3] part of the partition plate is set eclipse in a position intersecting the direction of introduction of the introduced the air blowing from the inlet, the housing portion is a space outside surrounded by the partition plate and, wherein said housing portion between said portion and the outer wall of the partition plate is also formed Ru Tei, [1] or drying apparatus for solid fuels according to [2].
[ 4 ] A part of the partition plate is provided at a position intersecting the introduction direction of the air blown introduced from the introduction port, and the ventilation path is directly upstream of the part of the partition plate in the introduction direction. It has a bent portion that is bent with respect to the front Kishirube incoming direction together provided, [1] to drying apparatus for solid fuels according to any one of [3].
[ 5 ] The solid fuel drying device according to [4 ], wherein the ventilation passage bends upward or downward at the bent portion.
[6] The solid fuel drying device according to [4] or [5], wherein the partition plate has a mesh shape.
[7] In the interior of the air passage, wherein the inlet port is extended along the front Kishirube incoming direction from the side surface portion provided, the air-impermeable partition plate is provided to form the bent portion, wherein ventilation passage, in the bent portion toward the front Kishirube incoming direction in the opposite direction, is reversed bending across the partition plate, [4] solid fuel according to any one of to [6] Drying device.
[8] in the side surface portion positioned in the flow direction ahead of the blower for circulating the air path reversed bending, an air-impermeable front plate that prevents the passage of the blower is provided, according to [7] Solid fuel dryer.
[9] The solid fuel drying device according to any one of [1] to [8], wherein the container has an insertion portion on the bottom surface into which a fork of a forklift can be inserted.
[10] The solid fuel drying device according to any one of [1] to [9], further comprising a blower connected to the introduction port to supply air to the internal space.

[11] In the solid fuel drying device according to any one of [1] to [10], the storage step of storing the solid fuel in the storage unit, and the storage unit through the introduction port and the ventilation passage. A method for drying a solid fuel, which comprises a blowing step of blowing air to the solid fuel stored in the solid fuel.
[12] The method for drying a solid fuel according to [11], wherein the raw material for the solid fuel contains at least one selected from paper sludge, pulper meal, and screen meal in a mass fraction of 30% or more.

[13] In the solid fuel drying device according to any one of [1] to [10], a solid fuel having a water content of 30% or more is stored, air is blown to the solid fuel, and 3 from the start of blowing. A method for drying a solid fuel, which comprises reducing the water content after a day to 29% or less.

[14] The container is provided with a breathable outer wall that forms an internal space capable of storing a wet solid substance, and an introduction port for introducing air into the internal space is provided on a side surface portion of the outer wall. The container has a storage portion for storing the wet solid matter in the internal space, and a ventilation path connected to the introduction port and formed as a flow path for the air to flow through the internal space. , the interior space, said interior space as well as divided into said air passage and the accommodating portion, the blower is provided breathable bulkhead plate that can pass through, at least the side surface portion of the outer wall is a mesh-like There, the outer wall positioned in the direction of introduction of the preceding introduced the blower from the inlet port, an air-impermeable back plate is characterized that you have provided to prevent the passage of the air blowing, solid Drying device.
Here, it is preferable that the solid matter drying apparatus of [14] further includes at least one or more of the technical features of the above [2] to [10].

[15] In the solid fuel drying apparatus according to [14], a storage step of storing the wet solid matter in the storage portion and the wet state stored in the storage portion through the introduction port and the ventilation passage. A method for drying a solid material, which comprises a blowing step of blowing air onto the solid material.

According to this case, the drying period of the solid fuel can be shortened.

It is a perspective view which shows typically the container of the drying apparatus which concerns on 1st Embodiment. It is a side view which shows typically the flow of the blast in the container of the drying apparatus which concerns on 1st Embodiment. It is a top view which shows the tent warehouse which arranged the drying apparatus which concerns on 1st Embodiment inside. It is a flowchart which shows the procedure of drying RPF which concerns on 1st Embodiment. It is a side view which shows typically the flow of the blast in the container of the drying apparatus which concerns on 1st modification of 1st Embodiment. It is a side view which shows typically the flow of the blast in the container of the drying apparatus which concerns on the 2nd modification of 1st Embodiment. It is a graph which shows the change of the water content in an Example and a comparative example.

A mode for carrying out this case will be described. The following embodiments are merely examples, and there is no intention of excluding various modifications and applications of techniques not specified in the embodiments. Each configuration of this embodiment can be variously modified and implemented without departing from the gist thereof. In addition, it can be selected as needed and can be combined as appropriate.

[I. Solid fuel drying device and drying method]
The drying device according to the first embodiment of the present invention dries the solid fuel by blowing air onto the solid fuel stored in the container. Further, in the drying method according to the first embodiment of the present invention, in the drying apparatus according to the present embodiment, the solid fuel is stored in a container and blown to the stored solid fuel to dry the solid fuel. is there. Examples of this solid fuel include fuels produced by reducing the volume and solidification of organic combustibles such as plastics, papers, woods, fibers, sludge, and garbage as raw materials. Be done.

In the following embodiments, RPF is exemplified as the solid fuel. RPF is a solid fuel produced from plastics or plastics and paper as main raw materials. The shape of the RPF can be appropriately changed depending on the shape of the nozzle provided in the volume reducing solidifying machine from which the molded RPF is extruded, and is not particularly limited, but is usually cylindrical. The diameter of the RPF can be appropriately changed depending on the inner diameter of the nozzle from which the molded RPF is extruded, and is not particularly limited, but is usually 5 mm or more, preferably 10 mm or more, more preferably 15 mm or more, still more preferably 20 mm or more. There are usually 100 mm or less, preferably 70 mm or less, more preferably 50 mm or less, still more preferably 40 mm or less. The length of the RPF can be appropriately changed depending on the operating cycle and extrusion speed of the cutter that cuts out the extruded and molded RPF, and is not particularly limited, but is usually 20 mm or more, preferably 30 mm or more, more preferably 50 mm. Above, it is more preferably 100 mm or more, usually 500 mm or less, preferably 300 mm or less, more preferably 250 mm or less, still more preferably 200 mm or less.

When recycling recycled paper from paper (waste paper) and plastics collected together with the waste paper, the waste paper and plastics are usually first melted by the pulper and separated into the waste paper raw material and the pulper lees containing the plastics. Will be done. Furthermore, the plastic contained in the recycled paper raw material is separated as screen meal by the screen. Then, from the wastewater, short fibers containing cellulose and paper sludge containing inorganic substances such as talc are recovered. A molded product of RPF can be obtained by volume-reducing and solidifying using the paper sludge, pulper meal, and screen meal thus obtained as raw materials using a volume-reducing solidifying machine. That is, the raw material for the solid fuel preferably contains at least one selected from paper sludge, pulper meal, and screen meal. The content of at least one selected from paper sludge, pulper meal, and screen meal with respect to the total amount of the raw material of the solid fuel is a mass fraction, usually 30% or more, preferably 40% or more, more preferably 50% or more, still more preferable. Is 60% or more, usually 100% or less, preferably 90% or less, more preferably 80% or less, still more preferably 70% or less.

RPF (Recycle Plastic fuel or Refuse Paper & Plastic Fuel) produced by using plastics and paper as a main raw material has a high water content, and it takes a long time to dry by natural drying. Therefore, this embodiment. It is suitably used for drying using the drying device and the drying method according to the above. The water content of the RPF molded product in the state before drying is usually 20% or more, preferably 25% or more, more preferably 30% or more, still more preferably 35% or more. On the other hand, the water content of the RPF molded product before drying is usually 40% or less. More specifically, it is usually 20% or more and 40% or less. In the present specification, the water content of RPF represents the mass fraction of water contained in RPF, and means a value measured by the evaluation method described in Examples.

In the present embodiment, with respect to the container for accommodating the RPF, the side where the introduction port for introducing the air blow into the internal space of the container is provided is the front side or the front side, and the opposite direction is the back side or the back side. In addition, the direction of action of gravity is downward, and the opposite direction is upward.

[1. Drying device]
The configuration of the drying device according to the present embodiment will be described with reference to FIGS. 1 to 3.
FIG. 1 is a perspective view of a container 11 provided in a drying device 100, in which a part of a wall surface is cut off to show the inside. As shown in FIG. 1, the drying device 100 includes at least a container 11 for storing the RPF. Further, as shown in FIG. 2, the drying device 100 further includes a blower 91 that supplies air to the internal space 12 of the container 11. Further, as shown in FIG. 3, it is preferable that the drying device 100 further includes a deodorizing machine 93 that deodorizes the exhaust gas discharged from the container 11.

<Container>
The container 11 has a breathable outer wall 21 to 24 that forms an internal space 12 capable of accommodating solid fuel. Further, the container 11 is provided with an introduction port 30 for introducing air into the internal space 12 on a side surface portion on the front surface side of the outer wall 21. The container 11 has a storage portion 13 for storing solid fuel in the internal space 12, and a ventilation passage 40 which is connected to the introduction port 30 and is formed as a flow path for air to flow through the internal space 12. Further, in the internal space 12, the storage portion 13 and the ventilation passage 40 are partitioned, and a breathable partition plate 50 through which air can pass is provided. The partition plate 50 is provided at least at a position intersecting the introduction direction of the blower introduced from the introduction port 30. Further, the ventilation passage 40 has a bent portion 41 that bends with respect to the introduction direction a1 of the air blown introduced from the introduction port 30. Further, the outer walls 21, 22, and 24 of the container 11 are provided with non-breathable blocking plates 61, 62, 64 that prevent the passage of air. Further, the outer wall 21 is provided with a partition blocking plate 65 in contact with its end.

The container 11 is usually made of a metal wire or plate. The container 11 of the present embodiment is made of steel and has a rust preventive coating on its surface. The material forming the container 11 is not particularly limited, and for example, metals such as iron, steel, stainless steel, aluminum, and copper, or alloys thereof can be used. Resin or FRP (Fiber Reinforced Plastics) may be used for the container 11, but from the viewpoint that the container 11 has sufficient strength and rigidity and prevents deformation of the container 11 when the RPF is stored. , Metal is preferred.
Hereinafter, the configuration of each part of the container 11 will be described.

〔leg〕
The container 11 has four legs 70 that stand in contact with each other in the vertical direction. The four legs 70 are all provided with substantially the same length, and are provided in a positional relationship in which the height of the upper end portion and the height of the lower end portion are substantially the same. The legs 70 are provided at the positions of the vertices of the rectangle in a plan view.
The leg portion 70 has an L-shaped columnar pedestal 71 at the upper portion, and has a pedestal-shaped pedestal 72 provided at the lower portion by expanding. As a result, by placing the pedestal 72 (not shown) of another container 11 on the upper part of the pedestal 71 of the container 11 from above, a plurality of containers 11 can be stacked in the vertical direction. There is.
A beam connecting the legs 70 is passed between the adjacent legs 70 near the upper part and the lower part. The beam is a columnar member with a flange. The beam distributes the load applied to the leg 70 to increase the strength of the container 11.

〔outer wall〕
Outer walls 21 to 24 are formed between the legs 70 adjacent to each other. Above all, the wall surface on which the introduction port 30 is provided is referred to as a front outer wall portion 21. Further, a wall surface having a positional relationship facing the front outer wall portion 21 is referred to as a back outer wall portion 22. Further, a wall surface that connects both ends of the front outer wall portion 21 and the back outer wall portion 22 and faces each other is referred to as a side outer wall portion 23. That is, the container 11 has a front outer wall portion 21, a back outer wall portion 22, and two side surface outer wall portions 23, and has a square columnar structure that circulates around these four surfaces as side surfaces. Further, the container 11 has a bottom surface outer wall portion 24 at the position of the bottom surface of the square columnar structure. The front outer wall portion 21, the back outer wall portion 22, the side outer wall portion 23, and the bottom outer wall portion 24 are collectively referred to as outer walls 21 to 24. The outer walls 21 to 24 surround the side portion and the bottom portion, and form an internal space 12 having an open upper portion.

The outer walls 21 to 24 are breathable. Here, in the present specification, the air permeability means that water vapor and air can pass through, and it is preferable that the air permeability is such that the passage of the air blown by the blower 91 is not obstructed. The outer walls 21 to 24 are made of a breathable member. The breathable member may have, for example, a wire mesh-like (mesh-like) structure formed by crossing and knitting a plurality of metal wire rods, and the plate material is provided with through holes. It may be a punched plate. The container 11 of the present embodiment is a mesh container in which the outer walls 21 to 24 have a mesh-like structure. The mesh-shaped outer walls 21 to 24 have a mesh to the extent that the molded RPF does not pass through. Since the RPF is usually formed in a long and thin cylindrical shape, it is preferable that the length of the short side of the mesh is shorter than the diameter of the cylindrical shape.

[Introduction port]
The front outer wall portion 21 is provided with a cylindrical pipe portion 31 penetrating the front outer wall portion 21 projecting outward at a lower portion in the center thereof. Then, an introduction port 30 that communicates the outside of the container 11 with the internal space 12 is formed through the pipe portion 31.
As shown in FIG. 2, the air blown introduced from the introduction port 30 flows into the inside of the container 11 along the introduction direction a1.

[Septal plate]
Inside the container 11, a pair of left and right side partition walls 53 extending from a position outside both ends of the pipe portion 31 of the front outer wall portion 21 toward the internal space 12 are provided. Further, on the back side of the side partition wall portion 53, a back partition wall portion 52 that connects the vertical sides of the pair of side partition wall portions 53 is provided. As shown in FIG. 2, the rear partition wall portion 52 is provided so as to intersect the introduction direction a1 of the air blown introduced from the introduction port 30. Then, a first storage portion 14, which will be described later, is formed between the back partition wall portion 52 and the back outer wall portion 22. Further, on the upper side of the side partition wall portion 53, an upper surface partition wall portion 55 is provided which connects the horizontal sides of the pair of side partition wall portions 53. The side partition 53, the back partition 52, and the top partition 55 are collectively referred to as a partition plate 50. All of the partition plates 50 have air permeability like the outer walls 21 to 24. In the present embodiment, the partition plate 50 has a mesh-like structure having a mesh so that the molded RPF does not pass through, like the outer walls 21 to 24.

[Ventilation path]
The interior space 12 is divided into a rectangular parallelepiped space surrounded by the partition plate 50. Of the internal space 12, the inner space surrounded by the partition plate 50 is referred to as a ventilation passage 40. On the other hand, of the internal space 12, the outer space surrounded by the partition plate 50 is referred to as a storage portion 13. Of the storage portions 13, the space sandwiched between the back partition wall portion 52 and the back outer wall portion 22 is referred to as the first storage portion 14. In other words, the space behind the ventilation passage 40 is referred to as the first storage unit 14. Further, among the storage portions 13, the spaces on the sides and above the ventilation passage 40 are referred to as the second storage portion 15. That is, in the storage unit 13, the space other than the first storage unit 14 is referred to as the second storage unit 15. The sides and the upper side of the ventilation passage 40 here include the space on the upper side of the ventilation passage 40 and the space on the back side, the side, the upper side, and the upper side of the ventilation passage 40.

In the present embodiment, the ventilation passage 40 is formed in contact with the bottom surface (bottom outer wall portion 24) of the container 11. The height of the ventilation passage 40 is usually about two-thirds of the height of the internal space 12. Further, the depth of the ventilation passage 40 is usually about two-thirds of the depth of the internal space 12. Since the ventilation passage 40 has the above-mentioned size with respect to the internal space 12, it tends to be easy to spread the air blown over the entire area in the internal space 12. Further, the volume occupied by the ventilation passage 40 in the internal space 12 is suppressed, and it tends to be easy to prevent the volume of the storage portion 13 from being reduced.

Normally, the RPF is housed in the internal space 12 in the state of use of the drying device 100. At this time, since the partition plate 50 does not allow the RPF to pass through, the space of the storage portion 13 is filled with the RPF, but the space of the ventilation passage 40 is not filled with the RPF, and the partition wall is inside the internal space 12. A cavity surrounded by RPF is formed across the plate 50. In this state, since the RPF is stored in the storage portion 13, the resistance for the air to pass through is larger than that of the hollow ventilation passage 40. Therefore, as shown in FIG. 2, the air blown introduced from the introduction port 30 flows into the ventilation passage 40, so that the air blown mainly travels along the ventilation passage 40. In FIG. 2, the flow of the blast is indicated by the white arrow b1. That is, the ventilation passage 40 is a flow path for blowing air. Since the partition plate 50 has air permeability, a part of the air flowing through the ventilation passage 40 can pass through the partition plate 50 and flow out to the storage portion 13. Normally, although the storage unit 13 is filled with RPF, there is a gap between the RPFs, so that the air that has passed through the partition plate 50 and flows out to the storage unit 13 passes through the RPF and is inside the storage unit 13. Can pass through. Then, the air blown through the storage portion 13 is discharged to the outside of the container 11.

Specifically, since the back partition wall portion 52 for partitioning the ventilation passage 40 and the first storage portion 14 is provided in the introduction direction a1 of the blower introduced from the introduction port 30, the air flows in the introduction direction a1. The air blows come into contact with the back partition wall portion 52. Further, the air blown in contact with the back partition wall portion 52 can pass through the back partition wall portion 52 and flow out to the first storage portion 14. In this way, by providing the back partition wall portion 52 so as to intersect the introduction direction a1 of the blower, the back partition wall portion 52 is passed through the blower, and the blower is sent from the inside of the ventilation passage 40 toward the storage portion 13 side. Can be done. Further, the air blown through the ventilation passage 40 can pass through the side partition wall portion 53 and the upper surface partition wall portion 55 and flow out to the second storage portion 15.

The ventilation passage 40 has a bent portion 41 that bends with respect to the introduction direction a1 of the air blown introduced from the introduction port 30. As will be described later, the bent portion 41 is formed by arranging the partition blocking plate 65 in the ventilation passage 40. Since the ventilation passage 40 has the bent portion 41, the blown air flowing in the introduction direction a1 comes into contact with the partition plate 50 at the bent portion 41. Further, a part of the air blown in contact with the partition plate 50 passes through the partition plate 50 and flows out to the first storage portion 14, and the other flows in the ventilation passage 40. In this way, by changing the flow path of the air blown at the position of the bent portion 41 and passing through the partition plate 50, the air blown can be sent from the inside of the ventilation passage 40 toward the storage portion 13.

The bending direction of the bending portion 41 is not particularly limited, and may be a vertical direction or a left-right direction, but the traveling direction of the ventilation passage 40 that changes with bending is in the central direction of the internal space 12. It is preferable to bend toward it. By bending in this way, it is possible to accelerate the drying of the RPF inside the container 11 by blowing air into the inside of the container 11. Further, from the viewpoint of creating a flow in which the air blows in the vertical direction, it is preferable that the ventilation passage 40 bends upward or downward. The lower limit of the bending angle of the bent portion 41 is not particularly limited, and is usually larger than 0 degrees, preferably 30 degrees or more, more preferably 45 degrees or more, still more preferably 60 degrees or more, and particularly preferably 90 degrees or more. The upper limit of the bending angle of the bending portion 41 is not particularly limited, and is usually 180 degrees or less. Further, the bent portion 41 may be bent a plurality of times, or the ventilation passage 40 may be provided with a plurality of bent portions 41.

As shown in FIG. 2, in the present embodiment, inside the ventilation passage 40, a partition plate 65 extending from the front outer wall portion 21 provided with the introduction port 30 is provided above the introduction port 30. .. Further, the partition plate 65 is provided along the introduction direction a1 of the blower introduced from the introduction port 30. The partition plate 65 has a non-breathable property that prevents the passage of air. Then, the ventilation passage 40 is inverted and bent at the bent portion 41 with the partition plate 65 in between, in the direction a2 opposite to the introduction direction a1 of the air blown introduced from the introduction port 30. As a result, the ventilation passage 40 is inverted 180 degrees at the bent portion 41 from the direction a1 toward the back outer wall portion 22, and forms a flow path that flows in the direction a2 toward the front outer wall portion 21. It has become.

Here, in the present specification, the non-breathable means that the passage of air is obstructed. Examples of such a non-breathable member include a plate-shaped or sheet-shaped member. It should be noted that the non-breathable property does not need to completely block the passage of air, and may be provided with pores to the extent that water vapor and gas can pass through, for example.

Further, in the present embodiment, since the introduction port 30 is provided in the lower part of the front outer wall portion 21, the ventilation passage 40 is directed 90 degrees upward so as to be directed toward the center of the container 11. It is bent. Further, immediately after facing upward, it is bent 90 degrees horizontally. In this way, the ventilation passage 40 extending in the horizontal direction is bent by a total of 180 degrees, so that the direction of ventilation is reversed by 180 degrees from the introduction direction a1 to the direction a2. As a result, at the first 90-degree bending position, the air blown in contact (collision) with the back partition wall portion 52 passes through the back partition wall portion 52 and flows out to the first storage portion 14 (arrows c1 to c4). Further, after the second 90-degree bending position, the air blown in contact (collision) with the upper partition wall portion 55 passes through the upper surface partition wall portion 55 and flows out to the second storage portion 15 (arrows c5 to c9). Further, in the entire length of the ventilation passage 40, the air blown in contact with the side partition wall portion 53 passes through the side partition wall portion 53 and flows out to the second storage portion 15 (not shown).

[Blocking plate]
Non-breathable blocking plates 61, 62, 64 are provided on the outer walls 21, 22, and 24 to prevent the passage of air.
The back outer wall portion 22 is provided with a back blocking plate 62 in the introduction direction a1 of the air blown introduced from the introduction port 30. By having the back blocking plate 62 in the flow direction of the blast in this way, the blasts (c1 to c4) that have passed through the back partition wall portion 52 collide with the back blocking plate 62 via the first storage portion 14. At this time, since the air blowing that collides with the back blocking plate 62 cannot pass through the back blocking plate 62, the flow path can be changed in the left-right direction or the up-down direction with respect to the traveling direction of the blowing toward the back blocking plate 62. become.

Further, the bottom surface outer wall portion 24 is provided with a bottom surface blocking plate 64 having the same width as the ventilation passage 40 and between the front outer wall portion 21 and the back outer wall portion 22. By having the bottom surface blocking plate 64 at the portion in contact with the ventilation passage 40 in this way, the air flowing into the ventilation passage 40 passes through the portion in contact with the bottom outer wall portion 24 of the ventilation passage 40 and is outside the container 11. It is designed to circulate inside the ventilation passage 40 or to flow out from the side partition wall portion 53 to the second storage portion 15 without being discharged to the air passage 40.

Further, the front outer wall portion 21 is provided with a front blocking plate 61 in the flow direction a2 of the air flowing through the ventilation passage 40. In this way, by having the front blocking plate 61 in the flow direction of the blast, the flow path is changed by 180 degrees at the bent portion 41, and the blast flowing toward the introduction port 30 side is combined with the front blocking plate 61. collide. At this time, since the air blowing that collides with the front blocking plate 61 cannot pass through the front blocking plate 61, the flow path can be changed in the left-right direction or the vertical direction with respect to the traveling direction of the blowing toward the front blocking plate 61. become.

[Insert]
The container 11 has a pair of insertion portions 81 into which a fork of a forklift can be inserted at the bottom thereof. By inserting the fork into the insertion portion 81 and rotating the fork to tilt or invert the container 11, the RPF housed inside can be discharged from the upper opening of the container 11. The insertion portion 81 is a columnar body having a tubular rectangular parallelepiped shape, and both ends thereof are opened to provide an insertion port 82 into which a fork is inserted. The insertion portion 81 has a space inside which the internal shape of the cross section in the lateral direction is larger than the horizontal width and the vertical width of the fork so that the fork can be inserted into the insertion portion 81. The insertion portion 81 is provided so that the insertion port 82 faces the front outer wall portion 21 side on which the introduction port 30 is provided. A pair of insertion portions 81 are provided side by side in accordance with the distance between the pair of forks of the forklift. Further, the insertion portion 81 is provided so that the pair of center positions thereof are located at the left and right center positions of the container 11. Thereby, when the container 11 is tilted or inverted to discharge the RPF stored inside, a balance can be achieved. The insertion portion 81 is fixed to the bottom of the container 11 by welding.

<Blower>
The blower 91 is a device that applies pressure to air and sends it out. The blower 91 is a device that is arranged outside the container 11 and produces a blower that is sent into the container 11 through a duct 92 described later. The type of the blower 91 is not particularly limited, and examples thereof include a propeller fan, a turbo fan, a sirocco fan, a radial fan, and a cross flow fan. As the blower 91, a hot air generator that supplies hot air or hot air may be used. By using the hot air generator, the drying period can be further shortened, but from the viewpoint of cost, it is preferable to use a fan that supplies air at room temperature.

The air volume of the blower 91 may be appropriately changed according to the capacity of the container 11 and the amount of RPF stored in the container 11, and is not particularly limited, but the lower limit thereof is usually 10 m ³ / min, preferably 20 m ³ / Min, more preferably 30 m ³ / min, more preferably 50 m ³ / min. The upper limit is not particularly limited, but is usually 80 m ³ / min. When the air volume of the blower 91 is within the above range, the drying of the RPF stored in the container 11 tends to be promoted.

One blower 91 may be connected to the duct 92 to blow air to the container 11, or two or more blowers 91 may be connected to the duct 92 to blow air to the container 11. Further, the duct 92 connected to one blower 91 may be branched, connected to a plurality of containers 11, and air may be blown to the plurality of containers 11 at the same time.

The duct 92 is a pipe (duct hose) that connects the air outlet of the blower 91 and the pipe portion 31 of the container 11 to circulate the air blown from the duct 92. The duct 92 is preferably a flexible duct because of the ease of handling and the high degree of freedom in the arrangement relationship between the blower 91 and the container 11. In the duct 92 of the present embodiment, a plurality of metal rings having a diameter substantially the same as the diameter of the hose are attached to a resin hose at regular intervals. One end of the duct 92 is detachably connected to the air outlet of the blower 91, and the other end is detachably connected to the pipe portion 31 of the container 11. For example, a magnetic material such as a magnet is attached to the end of the duct 92, and the end of the duct 92 is attracted to the pipe portion 31 or the front outer wall portion 21 by the magnetic force of the magnetic material, so that the duct 92 can be attached and detached. You can connect.

<Deodorizer>
The deodorizer 93 is a device that deodorizes the exhaust gas discharged from the container 11. Is not particularly as a deodorizer 9 3 limitation, adsorption method using an adsorbent such as activated carbon and zeolites; titanium oxide, photocatalytic degradation method using a photocatalyst such as tungsten oxide; copper oxide catalyst such as manganese oxide Oxidation catalytic decomposition method using the above; ozone decomposition method using ozone; etc. Alternatively, a combination of these methods may be used.

In the drying device 100 according to the present embodiment, since the blast is discharged from the breathable outer walls 21 to 24 of the container 11, the deodorizing machine 93 is used to deodorize the discharged exhaust gas. From the viewpoint of efficiently deodorizing the exhaust gas, the deodorizer 93 is preferably provided in the vicinity of the container 11. Alternatively, the deodorizer 93 is preferably arranged in the exhaust flow path. For example, as shown in FIG. 3, a drying device 100 is arranged in the tent warehouse 201, and the air in the tent warehouse 201 is discharged to the outside of the tent warehouse 201 via a ventilation fan 211 provided on the wall surface of the tent warehouse 201. However, in the case of drying, it is preferable to arrange the deodorizer 93 in the vicinity of the ventilation fan 211 in the tent warehouse 201, which is downstream of the exhaust. Alternatively, the exhaust pipe connected to the ventilation fan 211 outside the tent warehouse 201 may be further connected to the deodorizer 93, and the exhaust discharged through the exhaust pipe may be treated by the deodorizer 93.

<Drying device>
As described above, the drying device 100 includes a container 11, a blower 91, and a deodorizer 93. By supplying air to the internal space 12 of the container 11 by the blower 91, the drying of the RPF stored in the internal space 12 is promoted. Then, the exhaust gas discharged from the container 11 is deodorized by the deodorizer 93.

Here, the drying device 100 may be operated in an open space open to the outside air such as outdoors, or may be operated in a closed space isolated from the outside air. Alternatively, in the drying device 100, as in the tent warehouse 201 shown in FIG. 3, the internal space is partitioned at least in a part, and the internal space communicates with the external space in other parts, so that the internal space is communicated with the external space. The operation may be performed in a semi-open space where the gas and the outside air are exchanged. In the present embodiment, a case where the drying device 100 is operated in the semi-open space will be described as an example.

The tent warehouse 201 has an internal space capable of accommodating the drying device 100, and has a ceiling sheet (not shown) covering the upper part of the internal space, a side sheet 202 covering the side of the internal space, and a ceiling sheet and sides. It includes a skeleton (not shown) that reinforces the seat 202. The internal space of the tent warehouse 201 is divided by separating the internal space and the external space by these ceiling sheets and side sheets 202. A part of the side sheet 202 is provided with an opening 203 that communicates with the outside. The opening 203 opens the internal space of the tent warehouse 201 to the external space. Further, the drying device 100 can be carried in and out through the opening 203. The tent warehouse 201 has a ventilation fan 211 on the side sheet 202. In this embodiment, the tent warehouse 201 has five ventilation fans 211. The ventilation fan 211 is a ventilation device that discharges the air in the internal space of the tent warehouse 201 to the external space. By the operation of the ventilation fan 211, the outside air flows in from the opening 203, so that the air in the tent warehouse 201 circulates.

In the present embodiment, a drying device 100 including a container 11, a blower 91 connected to the container 11 via a duct hose 92, and a deodorizing machine 93 is arranged in the internal space of the tent warehouse 201. Then, the RPF is dried by operating the drying device 100 with the drying device 100 arranged inside the tent warehouse 201 in this way. Here, nine containers 11 are arranged, and three of the containers 11 are blown by a blower 91 connected to each of them. The other six drying devices are naturally dried in the tent warehouse 201. Further, in the tent warehouse 201, by arranging five deodorizers 93 near the ventilation fan 211, the deodorizer 93 is arranged on the downstream side of the exhaust gas in the tent warehouse 201, and the exhaust gas is efficiently deodorized. Can be done. In the present embodiment, the case where the container 11 is placed flat is illustrated, but the container 11 may be arranged in a state of being stacked vertically in the tent warehouse 201.

[2. Drying method]
A method of drying the RPF using the above-mentioned drying device 100 will be described with reference to FIG. The drying method according to the present embodiment includes a storage step of storing the solid fuel in the storage unit 13 and a blowing process of blowing air into the solid fuel stored in the storage unit 13 through the introduction port 30 and the ventilation passage 40. Further, a natural drying step of naturally drying the solid fuel may be provided. Hereinafter, each step will be described.

First, the solid fuel is stored in the storage unit 13 by charging the RPF molded product produced by the volume reducing solidifying machine into the internal space 12 of the container 11 (step S11: storage step). Normally, for storage in the storage unit 13, the molded product compressed and extruded by the volume reducing solidifying machine is directly transported as it is or, if necessary, using a belt conveyor or the like, and then put into the container 11. It is done by.

Next, the blower 91 connected to the pipe portion 31 via the duct hose 92 blows air to the storage portion 13 through the introduction port 30 and the ventilation passage 40 to blow dry the RPF (step S12: blow drying step). The blast drying step (blower step) is usually performed in the tent warehouse 201 described above. The length of the blast drying period may be appropriately changed according to the initial moisture content of the RPF, the degree of decrease in the moisture content, the temperature, humidity, the blast volume, etc., but the lower limit is usually half a day or more, preferably 1. It is more than a day, more preferably more than 2 days, still more preferably more than 3 days. The upper limit is not particularly limited, but is usually 15 days or less, preferably 10 days or less, and more preferably 5 days or less. Further, the blast drying is preferably performed until the initial water content is reduced by 1%, more preferably performed until the amount is reduced by 2%, further preferably performed until the amount is reduced by 3%, and the drying is performed until the amount is reduced by 5%. Is particularly preferable.

Subsequently, the blower 91 is removed and the RPF is naturally dried (step S13: natural drying step). The natural drying step may be performed inside the tent warehouse 201 described above, or may be performed outside the tent warehouse 201. Further, the RPF may be stored in the storage unit 13, or the RPF may be discharged from the container 11. When the RPF is discharged from the container 11, the RPF can be piled up in the open and naturally dried.

In the above description, the case where natural drying is performed after blast drying has been described as an example, but blast drying may be continued until a desired moisture content (for example, 5%) is reached. However, it is possible to shorten the period until the water content is finally reduced by performing air drying to reduce the initial water content after RPF molding and then performing natural drying. Further, when the blast drying is continued, it is necessary to continue blasting the container 11 using the blower 91 while the blast drying is being performed, but the blast drying is interrupted and the container 11 is shifted to natural drying. As a result, the blower 91 can be used for drying the other container 11. Therefore, it is preferable to combine blast drying and natural drying.

[3. Action and effect]
Since the drying device 100 according to the present embodiment is configured as described above, the following actions and effects can be obtained.

[1] In the drying device 100, by introducing the air blown through the introduction port 30, it is possible to blow air into the ventilation passage 40 which is the air flow path in the internal space 12 of the container 11. The air blown through the ventilation passage 40 comes into contact with the breathable partition plate 50 and flows out to the storage portion 13 side. The air flowing out to the storage unit 13 passes through the storage unit 13 and further passes through the outer walls 21 to 24 and is discharged to the outside of the container 11. In this way, by passing the blast through the storage portion 13, the blast can be transmitted to the RPF located inside the container 11 in which the moisture is relatively difficult to escape. Therefore, the drying of the RPF inside the container 11 is promoted, and the drying period can be shortened. Further, according to the drying device 100, it is possible to accelerate the drying of the RPF while it is stored in the container 11, so that the RPF can be stored or transported together with the container 11 while the RPF is stored in the container 11. it can. Therefore, in addition to shortening the drying period, the workability of handling the RPF is enhanced. Further, according to the drying device 100, the drying period can be shortened by blowing air without adding a new heat source. Of course, by using a heat source together, the drying period can be further shortened.

[2] The container 11 is provided with a non-breathable back blocking plate 62 on the back outer wall portion 22. As a result, the blower (arrows c1 to c4) introduced from the introduction port 30 and passing through the back partition wall portion 52 is stored along the back surface blocking plate 62 without passing through the back surface outer wall portion 22 as it is and flowing out to the outside. The inside of the portion 13 will be expanded. Above all, the air can be sent to the second storage portion 15 located on the left and right sides of the back blocking plate 62 among the storage portions 13. Therefore, it is possible to spread the air blown inside the storage unit 13 to accelerate the drying of the RPF.

[3] The container 11 is provided with a bottom surface blocking plate 64 in contact with the ventilation passage 40 on the bottom surface outer wall portion 24. As a result, the air blown introduced into the ventilation passage 40 is prevented from flowing out from the bottom surface outer wall portion 24 without being transmitted to the RPF, and spreads to the inside of the container 11 along the bottom surface blocking plate 64. Become. Above all, the air can be sent to the space of the second storage portion 15 located on the left and right sides of the ventilation passage 40 in the storage portion 13. Therefore, it is possible to spread the air blown inside the storage unit 13 to further accelerate the drying of the RPF.

[4] Since at least the back partition wall portion 52 is provided as the partition wall plate 50 in the introduction direction of the blower introduced from the introduction port 30, the blower passes through the back partition wall portion 52 and flows out to the first storage portion 14. To do. By letting the blast flow out in the direction of introduction of the blast in this way, it is possible to positively send the blast from the inside of the ventilation passage 40 toward the storage portion 13 side by utilizing the momentum in the flow direction of the blast. .. As a result, the drying of the RPF stored in the first storage portion 14 located on the back side of the ventilation passage 40 can be promoted, and the drying time can be shortened. Further, the ventilation passage 40 is formed from the introduction port 30 to the position where the back partition wall portion 52 is provided, and is partitioned from the first storage portion 14 by the back partition wall portion 52. That is, since the ventilation passage 40 is not formed so as to extend to the back outer wall portion 22, the RPF can be stored in the first storage portion 14. Therefore, the amount of RPF stored in the container 11 can be increased, and the drying efficiency can be improved.

[5] Since the ventilation passage 40 has the bent portion 41, the air blown through the back partition wall portion 52 in the vicinity of the bent portion 41 and flows out to the first storage portion 14 (arrows c1 to c4). In this way, not only to efflux blowing the housing portion 13 side by contacting the like side partition part 53 and the upper surface partition wall 55 of the air passage 40, the air blowing to the housing 13 side in the vicinity of bending the curved portion 41 It can be actively leaked. Moreover, since it is possible to flow out efficiently blown by utilizing the bending curved portion 41, or by increasing the air passage 40 in the internal space 12, to widen increase the contact area between the air passage 40 and the housing 13 Since it is not necessary, the volume of the storage portion 13 can be relatively increased to increase the storage amount of the RPF and improve the drying efficiency. Further, since the direction of the air flow can be changed by the bent portion 41, the air can be guided toward the central portion of the container 11 and the air can be spread to the internal space 12.

[6] The ventilation passage 40 is bent upward or downward at the bent portion 41. As a result, the flow of air blown at the bent portion 41 is changed, so that the air blown direction can be directed upward or downward to spread the air blown into the storage portion 13.

[7] The container 11 is provided with a partition blocking plate 65, and the ventilation passage 40 is inverted and bent with the partition blocking plate 65 in between. As a result, the air flow is changed by 180 degrees (a1 → a2) and flows so as to circulate inside the container 11, so that the air can flow out from the side partition wall portion 53 and the upper surface partition wall portion 55 ( Arrows c1 to c9). Therefore, while making the volume occupied by the ventilation passage 40 in the internal space 12 compact, the air blown out through the partition plate 50 can spread the air to the entire internal space 12 from the back side to the front side of the storage portion 13.

[8] Further, a front blocking plate 61 is provided in the flow direction a2 of the blown air that has been inverted and bent. At the end of the blowing stream b1, that spreads blowing inside the housing 13 along the front surface shield plate 61, blower introduced from the inlet 30 to RPF position of the introduction port 30 near that is shaded from direct The blast can be transmitted.

[9] An insertion portion 81 is provided on the bottom surface of the container 11. As a result, the container 11 can be transported by using the forklift, and the RPF stored inside can be discharged by rotating the container 11 by the forklift. Therefore, the handleability of the RPF and the container 11 in which the RPF is stored is improved.

[4. Others]
In the above description, a case where the partition blocking plate 65 is provided inside the ventilation passage 40 and the ventilation passage 40 has the bent portion 41 has been described as an example. The configuration of the ventilation passage 40 is not limited to this, and may be changed as appropriate. For example, as shown in FIG. 5, the partition blocking plate 65 may not be provided inside the ventilation passage 40, and the ventilation passage 40 may not bend with respect to the introduction direction of the air blown introduced from the introduction port 30. .. In FIG. 5, the flow of the blast is indicated by the white arrow b2.

In this case, the air blown introduced from the introduction port 30 flows in the introduction direction a1 and comes into contact (collision) with the rear partition wall portion 52. Then, the air blown in contact with the back partition wall portion 52 passes through the back partition wall portion 52 and flows out to the first storage portion 14 (arrows c1 to c4). Further, the air blown in contact with the upper surface partition wall portion 55 passes through the upper surface partition wall portion 55 and flows out to the second storage portion 15 (arrows c5 to c9). Further, the air blown in contact with the side partition wall portion 53 passes through the side partition wall portion 53 and flows out to the second storage portion 15 (not shown). In this way, the air can be sent to the storage unit 13.

In the above description, an example is a case where the partition plate 50 having the rear partition 52, the side partition 53, and the upper partition 55 is provided, and the rear partition 52 is provided in the introduction direction of the air blown introduced from the introduction port 30. I mentioned and explained in. The configuration of the ventilation passage 40 and the partition plate 50 is not limited to this, and may be changed as appropriate. For example, as shown in FIG. 6, the ventilation passage 40 is continuously provided from the introduction port 30 to the back outer wall portion 22 without providing the back partition wall portion 52 that separates the ventilation passage 40 and the first storage portion 14. You may be. In FIG. 6, the flow of the blast is indicated by the white arrow b3.

In this case, the ventilation passage 40 is inverted and bent with the partition plate 65 in the bent portion 41 near the back outer wall portion 22 in the direction a2 opposite to the introduction direction a1 of the air blown introduced from the introduction port 30. .. As a result, the air blown introduced from the introduction port 30 is reversed 180 degrees at the bent portion 41 from the direction a1 toward the back outer wall portion 22, and flows in the direction a2 toward the front outer wall portion 21. It has become. Then, the air blown in contact (collision) with the upper surface partition wall portion 55 passes through the upper surface partition wall portion 55 and flows out to the storage portion 13 (arrows c7 to c13). Further, the air blown in contact with the side partition wall portion 53 passes through the side partition wall portion 53 and flows out to the second storage portion 15 (not shown). In this way, the air can be sent to the second storage unit 15.

In the above description, the container 11 having the four legs 70 and the rectangular parallelepiped outer walls 21 to 24 has been described as an example. The shape of the container 11 is not limited to this, and may be appropriately changed. For example, it may have a prism such as a triangular prism or a hexagonal prism, or an outer wall having a shape such as a cylinder or a sphere. However, from the viewpoint of transporting the container 11 using a forklift and saving space when arranging a plurality of containers 11, a rectangular parallelepiped container shape is preferable.

In the above description, the case where the bottom outer wall portion 24 of the container 11 has a mesh-like structure has been described as an example. When a part of the RPF molded product is separated into small pieces, it may fall through the gap of the mesh. Therefore, from the viewpoint of preventing the RPF from falling, it is preferable that the bottom surface outer wall portion 24 has a fine mesh structure or a punching plate having through holes in the plate material, and a punching plate is more preferable.

In the above description, a case where the container 11 includes a beam provided between the legs 70 and the outer walls 21 to 24 has been described as an example. The container 11 may further include columnar members provided vertically or horizontally along the outer walls 21 to 24 between the legs 70 and in the middle of the beams. Thereby, the strength of the container 11 can be increased.

[II. How to dry solid fuel]
In the method for drying solid fuel according to the second embodiment of the present invention, first, a molded product of solid fuel is stored in a container. Then, the stored solid fuel is blown to dry. At this time, solid fuel having a water content of 30% or more is stored and blown, and the water content 3 days after the start of blowing is reduced to 29% or less. The water content 3 days after the start of ventilation is preferably 28% or less, more preferably 27% or less, further preferably 25% or less, and particularly preferably 20% or less.

As the solid fuel, as in the first embodiment, organic combustibles such as plastics, papers, woods, fibers, sludge, and kitchen waste are used as raw materials, and these raw materials are reduced in volume and solidified. The fuel used is used. Further, the raw material of the solid fuel preferably contains at least one selected from paper sludge, pulper meal, and screen meal, as in the first embodiment. Furthermore, the water content of the solid fuel molded product in the state before drying is usually 30% or more, preferably 35% or more, more preferably 40% or more, still more preferably 45% or more, and usually 50%. It is as follows.

The drying method according to the present embodiment can be carried out by using the drying apparatus according to the first embodiment described above, or the drying apparatus according to the first modification or the second modification of the first embodiment described above. Specifically, similarly to the drying method described with reference to FIG. 4 in the first embodiment, the storage step of storing the solid fuel in the storage unit 13 and the storage in the storage unit 13 through the introduction port 30 and the ventilation passage 40. It is preferable to include a blowing step of blowing the solid fuel. Further, a natural drying step of naturally drying the solid fuel may be provided.

Since the drying method according to the present embodiment is configured as described above, the following actions and effects can be obtained.
According to the studies by the present inventors, it has been found that when the solid fuel is dried, there is a period in which the water content decreases slowly at the initial stage, and after this initial period, the water content tends to decrease rapidly. did. For example, when drying is performed only by natural drying, it takes time to reduce the water content for several days after the start of drying because it is affected by this initial period, and as a result, the water content is reduced to the desired amount. The total period until it is made tends to be long.
On the other hand, in the drying method according to the present embodiment, by reducing the water content 3 days after the start of ventilation to 29% or less, drying can be promoted in a period in which the initial water content is difficult to decrease. Therefore, the total time required to reduce the desired water content can be shortened.

[III. Drying device for wet solids]
The drying apparatus according to the third embodiment of the present invention dries the wet solid by blowing air onto the wet solid contained in the container. The drying apparatus according to the present embodiment is the drying apparatus according to the first embodiment described above, or the first modification or the second modification of the first embodiment described above, except that the object to be dried is a solid substance in a wet state. It has the same configuration as the drying device according to the modified example.

In the specification of the present application, the wet solid substance is a mass obtained by solidifying a raw material into a desired shape and having a water content of 30% or more. The water content referred to here represents the mass fraction of water, and refers to a value measured by the evaluation method described in the examples. The shape of the solid material is not particularly limited, and examples thereof include a cylindrical shape, a conical shape, a cubic shape, a spherical shape, a disk shape, and a flake shape. Of these, a cylindrical shape is preferable. The solidification of the raw material can be carried out by using various known methods. For example, by compressing the raw materials, the raw materials are softened by frictional heat and melted with each other, extruded into a desired shape, and then cooled to solidify by volume reduction solidification. The shape, diameter, and length of the wet solid can be similar to the solid fuel described above with RPF as an example.

Examples of the wet solid matter include those having a water content of 30% or more among the solid fuels described in the first embodiment. In addition, examples of the solid matter include solid matter obtained by solidifying incinerator ash such as papermaking ash and coal ash, and among these, those having a water content of 30% or more are used as the solid matter in a wet state. Among these, a solid fuel having a water content of 30% or more is preferable. Further, the raw material of the solid fuel preferably contains at least one selected from paper sludge, pulper meal, and screen meal, as in the first embodiment.

The wet solid matter can be dried by using the drying apparatus according to the first embodiment described above. The drying method according to the present embodiment can be performed in the same manner as the drying method using the drying device 100 described in the first embodiment. Specifically, similarly to the drying method described with reference to FIG. 4 in the first embodiment, the storage step of storing the wet solid matter in the storage unit 13 and the storage unit through the introduction port 30 and the ventilation passage 40. It is preferable to include a blowing step of blowing air into the wet solid matter stored in 13. Further, a natural drying step of naturally drying the wet solid material may be provided.

Further, the drying method according to the present embodiment is the same as the drying method according to the second embodiment described above, in which a wet solid matter having a water content of 30% or more is stored and blown, and three days after the start of blowing. The water content of the above is preferably 29% or less.

Since the drying apparatus according to the present embodiment is configured as described above, the drying of the wet solid matter stored inside the container 11 is promoted in the same manner as the drying apparatus according to the first embodiment described above. Therefore, the drying period can be shortened. Further, since the drying of the solid matter can be promoted in the state of being stored in the container 11, the workability of handling the solid matter is improved.

Hereinafter, the present invention will be specifically described with reference to Production Examples, Examples, and Comparative Examples. The materials, amounts used, ratios, treatment contents, treatment procedures, etc. shown in the following Examples and Comparative Examples can be appropriately changed as long as they do not deviate from the gist of the present invention. Therefore, the present invention is not limited to the following examples.

<Evaluation method of water content>
The water content of the RPF samples obtained in Examples and Comparative Examples was measured according to JIS Z 7302-3 (Waste Solidified Fuel Part 3 Moisture Test Method).

<Manufacturing example 1>
Using used paper and plastics as raw materials, the used paper raw materials and plastics were separated by a pulper and a screen. The pulper lees and screen lees obtained at this time were mixed at a volume ratio of about 1: 1 and put into a volume reducing solidifying machine (product name: squeeze separator SS-30S type, manufactured by Koguma Iron Works Co., Ltd.). To produce a molded product of RPF. The operating conditions of the volume reduction solidifier are as follows.
Nozzle: 25 mm x 8 holes (maximum 23 holes)
Dewatering solidifier current set value: 200A (rated 225A)
Spacer: 13.7 mm (6.0 + 4.5 + 3.2 mm, 3 sheets in total)
Dehydration solidifier temperature setting: 140 ° C (maximum 190 ° C)

<Example 1>
The RPF produced in Production Example 1 was put into the container container A of Example 1. The amount of RPF charged was set to 95% of the volume of the internal space 12 of the container 11. Container The size of the internal space 12 surrounded by the outer walls 21 to 24 is 2000 mm in width, 1300 mm in height, and 1500 mm in depth, and the size of the ventilation passage 40 is 300 mm in width, 800 mm in height, and 1000 mm in depth. There is a mesh container. Container The container A has a diamond-shaped mesh mesh, and the diagonal lengths thereof are 25 cm and 10 cm, respectively.
Subsequently, the container container A containing the RPF was transported to the tent warehouse 201. A blower 91 (product name: SJS-300LA-1, manufactured by Suiden Co., Ltd.) was connected to the pipe portion 31 of the container container A via a duct hose 92. Then, the air was blown to the introduction port 30 to dry the air. The conditions for blowing air are as follows.
Output: 0.4kW
Air volume: 50m ³ / min
Air was blown to the introduction port 30 from the molding date of the RPF, and air was dried in the tent warehouse 201 from the molding date until 2 days had passed.
From the third day, the blower 91 and the duct hose 92 were removed from the container container A, and the container container A was transported outdoors from the tent warehouse 201. Then, the RPF was discharged from the container container A and piled up in the open. By leaving the RPF in this state to stand, it was further air-dried. Natural drying was carried out from the day when the RPF was formed to the day when 12 days had passed.
On the molding date of RPF and the day 1 to 2 days after the molding date, 3 RPF samples per day were randomly taken out from the container container A (samples 1 to 3), and the water content was evaluated. On days 3 to 12 days after the RPF molding date, 3 RPF samples per day were randomly taken out from the open-stacked RPFs (samples 1 to 3), and the water content was evaluated. The results are shown in Table 1 and FIG.

<Comparative example 1>
In Example 1, the RPF was charged into the container container B in the same manner except that the container container A was changed to the container container B of Comparative Example 1. Container The container B is a mesh container having an internal space of 2000 mm in width, 1300 mm in height, and 1500 mm in depth, and does not have a ventilation passage 40. Similar to the container container A, the container container B has a diamond-shaped mesh mesh, and the diagonal lengths thereof are 25 cm and 10 cm, respectively.
Subsequently, the container container B containing the RPF was transported to the tent warehouse 201. Then, it was left in the tent warehouse 201 and naturally dried in the tent warehouse 201 from the molding date of the RPF until 2 days passed.
From the third day, the container container B was transported outdoors from the tent warehouse 201. Then, the RPF was discharged from the container container B and piled up in the open. By leaving the RPF in this state to stand, it was further air-dried. Natural drying was carried out from the day when the RPF was formed to the day when 12 days had passed.
On the molding date of RPF and the day 1 to 2 days after the molding date, 3 RPF samples per day were randomly taken out from the container container B (samples 1 to 3), and the water content was evaluated. On days 3 to 12 days after the RPF molding date, 3 RPF samples per day were randomly taken out from the open-stacked RPFs (samples 1 to 3), and the water content was evaluated. The results are shown in Table 2 and FIG.

<Comparative example 2>
The RPF was charged into the container container B in the same manner as in Comparative Example 1.
Subsequently, the container container B containing the RPF was transported to the tent warehouse 201. Then, in the tent warehouse 201, a blower 91 (product name: SJS-300LA-1, manufactured by Suiden Co., Ltd.) is used to blow air from a distance of 1 m from the outer wall of the container container B to dry the air. Was done. The conditions for blowing air are as follows.
Output: 0.4kW
Air volume: 50m ³ / min
Air was blown to the outer wall from the molding date of the RPF, and air was dried in the tent warehouse 201 from the molding date until 2 days had passed.
From the third day, the ventilation was stopped and the container container B was transported outdoors from the tent warehouse 201. Then, the RPF was discharged from the container container B and piled up in the open. By leaving the RPF in this state to stand, it was further air-dried. Natural drying was carried out from the day when the RPF was formed to the day when 12 days had passed.
On the RPF molding date and one to two days after the molding date, two RPF samples are randomly taken out from the container container B (samples 1 and 2) per day, and one RPF sample is taken out from the container. The container B was taken out from the position of the blown surface where the air was blown (Sample 3), and the water content was evaluated. On days 3 to 12 days after the RPF molding date, 3 RPF samples per day were randomly taken out from the open-stacked RPFs (samples 1 to 3), and the water content was evaluated. The results are shown in Table 3 and FIG.

<Discussion>
In Comparative Example 1 in which natural drying was performed using a mesh container, the average value of the water content was 5% or less, which is the water content (mass fraction) defined in JIS7311: 2010, on the molding date of the RPF. It was 12 days after that.
In Comparative Example 2 in which the air blown to the wall surface and the natural drying were performed using a mesh container, the water content of the sample 3 on the air blown surface was 25.1% after 2 days, and the drying was promoted. It turned out that it had been done. However, the samples other than the wall surface were not dried, and the average value of the water content was 5% or less at 12 days after the RPF molding date, which was the same result as in Comparative Example 1. Met.

In Example 1 in which air was blown from the inlet 30 and air-dried using a mesh container, the average value of the water content after 2 days was 26.6%, which was 32 in Comparative Example 1. A decrease of nearly 20% compared to 1% indicates that drying was significantly promoted. Further, in Example 1, the average value of the water content was 5% or less when 10 days had passed from the molding date of RPF, and the drying period was shortened by as much as 2 days as compared with Comparative Examples 1 and 2. It has become possible.
Further, from the results of Comparative Example 1, it can be seen that the decrease in water content from the molding date of RPF to the day when two days have passed is gradual, and it is difficult to dry in this period only by natural drying. On the other hand, according to the present invention, it can be seen that drying can be promoted during a period of several days from the RPF molding date when the water content is unlikely to decrease.
In Example 1, the blast drying was performed until the lapse of 2 days, but from the tendency of the water content to decrease until the lapse of 2 days, when the blast drying was continued, the water content was 7 days after the RPF molding date. It is estimated that the average value of the amount will be 5% or less. In this case, the drying period can be shortened by 5 days as compared with Comparative Examples 1 and 2, and the drying period can be reduced to about 60%.

100 Drying device 11 Container 12 Internal space 13 Storage unit 14 First storage unit 15 Second storage unit 21 Outer wall (front outer wall part)
22 Outer wall (rear outer wall)
23 Outer wall (side outer wall)
24 outer wall (bottom outer wall)
30 Introductory port 31 Pipe part 40 Ventilation passage 41 Bending part 50 Partition plate 52 Back partition 53 Side partition 55 Top partition 61 Front plate (front blocking plate)
62 Back plate (back blocking plate)
64 Bottom plate (bottom blocking plate)
65 Specifications Setsuban (partition blocking plate)
81 Insert 91 Blower 92 Duct hose 93 Deodorizer

Claims (14)

It has a breathable outer wall that forms an internal space that can store solid fuel, and is provided with a container that has an introduction port that introduces air into the internal space on the side surface of the outer wall.
The container has, in the internal space, a storage portion for accommodating the solid fuel and a ventilation path connected to the introduction port and formed as a flow path for the air blown through the internal space.
Wherein the interior space, as well as partitioning the internal space into said air passage and the accommodating portion, the partition wall plate of breathability the blowing can pass is provided,
At least the side surface portion of the outer wall is mesh-like.
The outer wall located ahead of the introduction direction of the blower introduced from the introduction port is provided with a non-breathable back plate that prevents the passage of the blower. Fuel dryer . The bottom surface of the outer wall is also mesh-like.
The ventilation passage is formed in contact with the front Symbol bottom surface portion,
A non-breathable bottom plate that obstructs the passage of the air blower is provided at a position of the bottom surface portion in contact with the ventilation passage.
The solid fuel drying device according to claim 1. Some of the partition plate is set eclipse in a position intersecting the direction of introduction of the introduced the air blowing from the inlet,
The storage unit is a space outside surrounded by the partition plate, and, Ru Tei also formed between said portion and said outer wall of said partition plate,
The solid fuel drying device according to claim 1 or 2. A part of the partition plate is provided at a position intersecting the introduction direction of the blower introduced from the introduction port.
The air passage has a bent portion that is bent with respect to the front Kishirube incoming direction together provided immediately upstream in the direction of introduction of the portion of the partition plate,
The solid fuel drying device according to any one of claims 1 to 3. The ventilation path bends upward or downward at the bent portion.
The solid fuel drying device according to claim 4. The partition plate has a mesh shape.
The solid fuel drying device according to claim 4 or 5. Inside said air passage, said inlet is extended along the front Kishirube incoming direction from the side surface portion provided, the air-impermeable partition plate is provided to form the bent portion,
The partition plate obstructs the passage of the air blower.
The air passage is in the bent portion, before Kishirube toward the incoming direction and the opposite direction, is reversed bending across the partition plate,
The solid fuel drying device according to any one of claims 4 to 6. The side surface portion positioned in the flow direction ahead of the blower for circulating the air path reversed bending, an air-impermeable front plate that prevents the passage of the blower is provided,
The solid fuel drying device according to claim 7. The container has an insertion portion on the bottom surface into which a fork of a forklift can be inserted.
The solid fuel drying device according to any one of claims 1 to 8. A blower connected to the inlet to supply air to the interior space is further provided.
The solid fuel drying device according to any one of claims 1 to 9. In the solid fuel drying apparatus according to any one of claims 1 to 10, a storage step of storing the solid fuel in the storage unit and a storage step of storing the solid fuel in the storage unit.
A method for drying a solid fuel, which comprises a blowing step of blowing air into the solid fuel stored in the storage portion through the introduction port and the ventilation passage. The raw material of the solid fuel contains at least one selected from paper sludge, pulper meal, and screen meal in a mass fraction of 30% or more.
The method for drying solid fuel according to claim 11. The drying apparatus for solid fuels according to any one of claims 1 to 10, moisture content and accommodating the solid fuel of 30% or more, subjected to air blowing to the solid fuel, the water content of 3 days after the start of air blowing A method for drying solid fuel , which comprises reducing the amount to 29% or less. It has a breathable outer wall that forms an internal space that can store wet solids, and is provided with a container provided with an inlet for introducing air into the internal space on the side surface of the outer wall.
The container has a storage portion for storing the wet solid matter in the internal space, and a ventilation passage connected to the introduction port and formed as a flow path for the air to flow through the internal space. And
Wherein the interior space, as well as partitioning the internal space into said air passage and the accommodating portion, the partition wall plate of breathability the blowing can pass is provided,
At least the side surface portion of the outer wall is mesh-like.
The outer wall located ahead of the introduction direction of the blower introduced from the introduction port is provided with a non-breathable back plate that prevents the passage of the blower. A device for drying things.

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