JP2020085289A - Dryer - Google Patents

Abstract

To decrease moisture sticking to a drying object.SOLUTION: A dryer 1 comprises a drying chamber 10, a dispersion chamber 12 disposed adjacent to the drying chamber 10, a first gas supply section (a gas diffusion pipe 34, a fluidizing gas supply source 36) for supplying the drying chamber 10 with fluidizing gas, a second gas supply section (a wind box 62, a fluidizing gas supply source 36) for supplying the dispersion chamber 12 with fluidizing gas, an overflow wall 24 that separates the drying chamber 10 and the dispersion chamber 12, a supply port 32 disposed above the overflow wall 24 or on the overflow wall 24 itself to communicate the drying chamber 10 and the dispersion chamber 12, a charging port 86 disposed above the lowest part of the supply port 32 to communicate the inside and the outside of the dispersion chamber 12, and a partition plate 70 disposed in the dispersion chamber 12 between the charging port 86 and the supply port 32, extending below the lowest part of the supply port 32, and apart from the bottom face of the dispersion chamber 12.SELECTED DRAWING: Figure 2

Description

The present disclosure relates to a drying device.

Patent Document 1 discloses a fluidized bed dryer that fluidizes and dries an object to be dried in a drying chamber. In such a technique, a preliminary drying chamber is continuously provided via an overflow weir that forms a drying chamber. The inlet for the material to be dried is provided in the upper part of the preliminary drying chamber and communicates with both the preliminary drying chamber and the drying chamber.

JP-A-1-111190

In the technique of Patent Document 1, since the input port of the material to be dried is also in communication with the drying chamber, the input material to be dried may move to the drying chamber without sufficiently staying in the preliminary drying chamber. is there. Therefore, in such a technique, the material to be dried may not be sufficiently predried.

An object of the present disclosure is to provide a drying device capable of reducing moisture attached to an object to be dried.

In order to solve the above problems, a drying apparatus according to an aspect of the present disclosure includes a drying chamber, a dispersion chamber provided adjacent to the drying chamber, and a first gas supply unit that supplies a fluidizing gas to the drying chamber. And a second gas supply unit for supplying a fluidizing gas to the dispersion chamber, an overflow wall for partitioning the drying chamber and the dispersion chamber, and an upper portion of the overflow wall or the overflow wall itself, and the drying chamber and the dispersion chamber. The inlet that communicates with the inside and outside of the dispersion chamber and the inlet that is located above the bottom of the inlet, and the bottom of the inlet that is located between the inlet and the inlet in the dispersion chamber. And a partition plate that extends further downward than the bottom of the dispersion chamber.

In addition, an inclined portion that is provided on the side opposite to the overflow wall with respect to the partition plate and that gradually reduces the horizontal cross-sectional area in the dispersion chamber toward the lower side may be provided.

The angle of the inclined portion with respect to the horizontal plane may be equal to or greater than the repose angle of the material to be dried.

Further, the horizontal sectional area between the partition plate and the top of the inclined portion may be equal to the horizontal sectional area between the partition plate and the overflow wall.

Further, the lowermost portion of the partition plate may be located below the top of the inclined portion.

Further, the lowermost portion of the partition plate may be located closer to the overflow wall than the lowermost portion of the inclined portion.

According to the present disclosure, it is possible to reduce the amount of water attached to the material to be dried.

It is a perspective view showing the composition of a drying device. It is sectional drawing which shows the structure of a drying device.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiments are merely examples for facilitating understanding, and do not limit the present disclosure unless otherwise specified. In this specification and the drawings, elements having substantially the same function and configuration are denoted by the same reference numerals to omit redundant description, and elements not directly related to the present disclosure are omitted. To do.

FIG. 1 is a perspective view showing the structure of the drying device 1. FIG. 2 is a cross-sectional view showing the configuration of the drying device 1. The drying device 1 fluidizes and dries an object to be dried such as coal (for example, brown coal). The fluidizing gas that fluidizes the material to be dried is, for example, steam at 100° C. or higher. In FIGS. 1 and 2, the direction of the flow of the fluidizing gas is shown by solid arrows. Further, in FIG. 1 and FIG. 2, the direction of the flow of the material to be dried is indicated by a dashed-dotted arrow. Further, in FIGS. 1 and 2, the direction of signal flow is indicated by a dashed arrow. In addition, in FIG. 1, the notation of the material to be dried in the drying device 1 is omitted.

The drying device 1 includes a drying chamber 10 and a dispersion chamber 12. The dispersion chamber 12 is a preliminary drying chamber for preliminary drying (preliminary drying) of a material to be dried containing water. The drying chamber 10 is a main drying chamber for further drying (main drying) the material to be dried that has been pre-dried in the dispersion chamber 12.

The drying chamber 10 includes a main body 20 and a tapered portion 22. The main body 20 is formed in a hollow box shape. The body 20 is defined by one overflow wall 24 and three side walls 26. The overflow wall 24 and the side wall 26 extend in the vertical direction. The dispersion chamber 12 is provided adjacent to the drying chamber 10 with the overflow wall 24 interposed therebetween. The overflow wall 24 partitions the drying chamber 10 and the dispersion chamber 12.

The top of the side wall 26 is connected to a ceiling 28 that closes the main body 20. The overflow wall 24 has a vertical height lower than that of the side wall 26, and is not connected to the ceiling portion 28. That is, the supply port 32 that connects the drying chamber 10 and the dispersion chamber 12 is formed between the top portion 30 and the ceiling portion 28 of the overflow wall 24. The lowermost part of the supply port 32 corresponds to the top 30 of the overflow wall 24, and the uppermost part of the supply port 32 corresponds to the ceiling part 28. The separation distance between the top portion 30 of the overflow wall 24 and the ceiling portion 28 (opening height of the supply port 32) is sufficiently longer than the particle size of the material to be dried. The material to be dried is supplied from the dispersion chamber 12 to the drying chamber 10 through the supply port 32, that is, over the top portion 30 of the overflow wall 24.

The tapered portion 22 is continuous with the lower portion of the main body 20. The taper portion 22 is formed in a hollow pyramid shape whose horizontal cross-sectional area gradually decreases as it goes vertically downward. A plurality of air diffusers 34 are provided near the main body 20 in the tapered portion 22. The plurality of air diffusers 34 extend parallel to each other in a direction intersecting the overflow wall 24 (lateral direction in FIGS. 1 and 2 ). The plurality of air diffusers 34 are separated from each other.

The fluidizing gas (steam) is supplied to the air diffuser 34 from a fluidizing gas supply source 36 such as a boiler. The air diffusing pipe 34 supplies the fluidizing gas into the drying chamber 10. That is, the air diffuser 34 and the fluidizing gas supply source 36 function as a first gas supply unit that supplies the fluidizing gas to the drying chamber 10. The fluidizing gas supplied into the drying chamber 10 rises in the drying chamber 10 and fluidizes the material to be dried in the drying chamber 10. As a result, the material to be dried in the drying chamber 10 forms a fluidized bed. Further, the fluidized gas supplied into the drying chamber 10 comes into contact with the material to be dried in the drying chamber 10 to dry the material to be dried by the heat of the fluidized gas.

An opening 38 that communicates the inside and outside of the drying chamber 10 is provided in a part of the ceiling portion 28. A pipe 39 is connected to the opening 38. The pipe 39 is connected to, for example, a cyclone. The fluidized gas that has risen in the drying chamber 10 is delivered to the pipe 39 (outside the drying device 1) through the opening 38. Fine particles (dust) generated from the material to be dried are sent to the pipe 39 along with the fluidizing gas. The fluidizing gas with the fine particles is sent to the cyclone through the pipe 39. Cyclones remove fine particles from the fluidizing gas. The fluidized gas from which the fine particles have been removed is sent to the diffuser pipe 34 and the like (the inner pipe 40 and the wind box 62 described later) and reused.

The main body 20 is provided with a plurality of inner tubes 40. The plurality of inner tubes 40 are horizontal and extend parallel to each other in a direction intersecting the air diffusing tube 34. The plurality of inner tubes 40 are arranged separately from each other in the vertical direction and the extending direction of the air diffusing tube 34. The plurality of inner tubes 40 are arranged vertically above the air diffuser 34 and vertically below the top 30 of the overflow wall 24. Both ends of the plurality of inner tubes 40 are collected by headers 42.

A heat medium is supplied to the plurality of inner tubes 40 through a header 42. More specifically, steam of 100° C. or higher is supplied as a heat medium from the fluidizing gas supply source 36 to the plurality of inner tubes 40. That is, here, the vapor is used together with the fluidizing gas and the heat medium. The plurality of inner tubes 40 transfer the heat of the heat medium to the material to be dried in the drying chamber 10. As a result, in the drying chamber 10, the material to be dried is sufficiently heated by the heat of the fluidizing gas supplied from the air diffusing tube 34 and the heat transfer through the plurality of inner tubes 40, and the drying of the material to be dried is promoted. It

The lower portion of the tapered portion 22 is connected to the feeder 44. The feeder 44 is, for example, a rotary feeder. The material to be dried that has moved vertically downward is supplied to the feeder 44 through the gaps between the plurality of air diffusing tubes 34. The feeder 44 sends (withdraws) the dried material to be dried to the outside of the drying device 1.

The drying chamber 10 is provided with a level sensor 46 that detects the layer height (deposition height) of the material to be dried in the drying chamber 10. The height control unit 48 is composed of a central processing unit (CPU), a ROM storing programs and the like, a semiconductor integrated circuit including a RAM as a work area, and the like. The bed height control unit 48 controls the bed height of the material to be dried in the drying chamber 10 by controlling the amount of the material to be dried (the amount of rotation of the feeder 44) based on the detection result of the level sensor 46. ..

The dispersion chamber 12 is formed in a hollow box shape. The dispersion chamber 12 is defined by an overflow wall 24, which is shared with the drying chamber 10, a front wall 50, and two side walls 52. The overflow wall 24, the front wall 50, and the side wall 52 extend in the vertical direction.

The top of the front wall 50 and the top of the side wall 52 are located at the same height as the top of the side wall 26 of the drying chamber 10. The top of the front wall 50 and the top of the side wall 52 are connected to a ceiling 54 that closes the dispersion chamber 12. The ceiling 54 of the dispersion chamber 12 is continuous with the ceiling 28 of the drying chamber 10. The overflow wall 24 is lower in height in the vertical direction than the front wall 50 and the side wall 52, and is not connected to the ceiling portion 54.

The front wall 50 is arranged so as to be separated from the overflow wall 24 in the opposite direction. In other words, the front wall 50 is provided on the side opposite to the overflow wall 24 with respect to the partition plate 70 described later. The front wall 50 includes a vertical portion 56 and an inclined portion 58. The vertical portion 56 is located above the front wall 50 and extends in the vertical direction. The inclined portion 58 is located below the front wall 50 and is continuous with the vertical portion 56. Hereinafter, the boundary between the vertical portion 56 and the inclined portion 58 may be referred to as the top portion 60 of the inclined portion 58. The top portion 60 of the inclined portion 58 is located below the top portion 30 of the overflow wall 24.

The inclined portion 58 is inclined downward vertically so as to gradually reduce the horizontal cross-sectional area in the dispersion chamber 12. The inclination angle of the inclined portion 58 with respect to the horizontal plane is equal to or greater than the repose angle of the material to be dried. Specifically, the inclined portion 58 has an inclination angle of about 60 degrees with respect to the horizontal plane.

A wind box 62 is provided below the dispersion chamber 12. The wind box 62 is formed in a hollow box shape. The upper part of the wind box 62 is formed by a dispersion plate 64. The dispersion plate 64 is continuous with the lowermost portion 66 of the inclined portion 58 and also functions as the bottom surface of the dispersion chamber 12. The dispersion plate 64 is provided with a plurality of standing nozzles 68 at predetermined intervals. The nozzle 68 is provided with an opening having a diameter smaller than that of the material to be dried. The opening of the nozzle 68 connects the inside of the wind box 62 and the inside of the dispersion chamber 12 with the dispersion plate 64 interposed therebetween. The air box 62 is supplied with a fluidizing gas (steam) from the fluidizing gas supply source 36. The air box 62 uniformly supplies the fluidizing gas into the dispersion chamber 12 through the plurality of nozzles 68. That is, the air box 62 and the fluidizing gas supply source 36 function as a second gas supply unit that supplies the fluidizing gas to the dispersion chamber.

A partition plate 70 extending in the vertical direction is provided in the dispersion chamber 12. The partition plate 70 is provided parallel to the overflow wall 24. The top 72 of the partition plate 70 is located at the same height as the tops of the front wall 50 and the side wall 52, and is connected to the ceiling 54. The top 72 of the partition plate 70 is located at the same height as the uppermost part (ceilings 28, 54) of the supply port 32. The partition plate 70 extends below the top portion 30 (the lowermost portion of the supply port 32) of the overflow wall 24. The partition plate 70 is provided from one side wall 52 to the other side wall 52.

The partition plate 70 partitions the region on the front wall 50 side and the region on the overflow wall 24 side in the dispersion chamber 12. Hereinafter, the area between the partition plate 70 and the front wall 50 may be referred to as the front wall side area A1. Further, the area between the partition plate 70 and the overflow wall 24 may be referred to as an overflow wall side area A2.

The partition plate 70 is partitioned so that the horizontal sectional area of the front wall side area A1 above the inclined portion 58 (the vertical portion 56) is equal to the horizontal sectional area of the overflow wall side area A2. Specifically, the horizontal sectional area between the partition plate 70 and the top portion 60 of the inclined portion 58 is equal to the horizontal sectional area between the partition plate 70 and the overflow wall 24.

A notch 74 is provided in a part of the top 72 of the partition plate 70. The cutout portion 74 connects the overflow wall 24 side of the partition plate 70 and the front wall 50 side. The cutout portion 74 is recessed from the top portion 72 by a predetermined depth. The predetermined depth is, for example, about 10 mm (millimeter), but is not limited to this example. The cutout portion 74 extends in the ridgeline direction of the top portion 72 (direction from one side wall 52 to the other side wall 52). The cutout portion 74 is provided in a section between the center portion in the ridge direction and the one side wall 52, and in a section between the center portion in the ridge direction and the other side wall 52. That is, the notch 74 is not provided in the vicinity of the central portion of the top portion 72 in the ridge direction and in the vicinity of the side walls 52. The partition plate 70 is connected to the ceiling portion 54 in the vicinity of the central portion where the cutout portion 74 is not provided in the top portion 72 and in the vicinity of both side walls 52.

An opening 76 is provided on the ceiling 54 on the front wall 50 side of the partition plate 70. A hopper 80 is connected to the opening 76. The hopper 80 includes a tapered portion 82 and a skirt portion 84. The taper portion 82 is formed in a hollow conical shape whose horizontal cross-sectional area gradually decreases as it goes vertically downward. The skirt portion 84 is formed in a hollow cylindrical shape and extends in the vertical direction. One end of the skirt portion 84 is continuous with the lower portion of the tapered portion 82. An end of the skirt portion 84 opposite to the tapered portion 82 is inserted into the dispersion chamber 12 through the opening 76.

An input port 86 that opens into the dispersion chamber 12 is formed at the end of the skirt portion 84 opposite to the tapered portion 82. The inlet 86 connects the inside and outside of the dispersion chamber 12 through the hopper 80. The charging port 86 is located below the top 72 of the partition plate 70. Specifically, the input port 86 is located below the lower end of the cutout portion 74 of the partition plate 70. The input port 86 is located closer to the front wall 50 than the partition plate 70. In other words, the partition plate 70 is located between the input port 86 and the supply port 32 in the horizontal direction.

An object to be dried (for example, brown coal) containing water is charged into the dispersion chamber 12 through the hopper 80 and the charging port 86. For example, a predetermined amount (for example, 30 t/h) of the material to be dried is continuously charged into the dispersion chamber 12 per unit time.

The lowermost portion 88 of the partition plate 70 is separated from the dispersion plate 64 (bottom surface of the dispersion chamber 12). Below the lowermost portion 88 of the partition plate 70 in the dispersion chamber 12, the front wall side region A1 and the overflow wall side region A2 communicate with each other. Therefore, the material to be dried put in the front wall side area A1 can move to the overflow wall side area A2 through the lower portion 88 of the partition plate 70. The separation distance between the lowermost portion 88 of the partition plate 70 and the dispersion plate 64 is set, for example, so that the frictional resistance when the material to be dried passes below the lowermost portion 88 of the partition plate 70 becomes a predetermined value or less. ..

In this way, the partition plate 70 connects the front wall side area A1 and the overflow wall side area A2 in the lower part of the dispersion chamber 12, and the front wall side area A1 and the overflow wall side area A2 in the upper part of the dispersion chamber 12. Partition.

Further, the lowermost portion 88 of the partition plate 70 is located below the top portion 60 of the inclined portion 58. Further, the lowermost portion 88 of the partition plate 70 is located closer to the overflow wall 24 than the lowermost portion 66 of the inclined portion 58.

As described above, the air box 62 is supplied with the fluidizing gas. The fluidizing gas supplied to the dispersion chamber 12 through the air box 62 rises in the dispersion chamber 12 and fluidizes the material to be dried in the dispersion chamber 12. As a result, the material to be dried in the dispersion chamber 12 forms a fluidized bed. Further, the fluidizing gas supplied into the dispersion chamber 12 comes into contact with the material to be dried in the dispersion chamber 12, so that the material to be dried is dried by the heat of the fluidizing gas. The fluidizing gas in the dispersion chamber 12 is delivered to the pipe 39 through the cutout portion 74, the supply port 32, and the opening portion 38. An opening connected to the pipe 39 may be formed in the ceiling 54 of the dispersion chamber 12.

A fluidizing gas under the same conditions as the fluidizing gas supplied to the drying chamber 10 is supplied to the dispersion chamber 12, for example. However, unlike the drying chamber 10, the dispersion chamber 12 is not provided with a plurality of inner tubes 40 that cause flow resistance. Therefore, the superficial velocity in the dispersion chamber 12 becomes higher than that in the drying chamber 10. The higher the superficial velocity, the higher the dispersibility of the material to be dried (mixability of the material to be dried and the fluidizing gas). Therefore, in the dispersion chamber 12, the material to be dried is pre-dried with the fluidizing gas even without the plurality of inner tubes 40. In addition, in the drying chamber 10, the heat transfer by the plurality of inner tubes 40 is applied, so that the substance to be dried can be dried in the dispersion chamber 12 or higher even if the superficial velocity is low.

Next, the operation of the drying device 1 will be described. The material to be dried is introduced into the front wall side region A1 of the dispersion chamber 12 through the introduction port 86. The material to be dried deposited on the front wall side area A1 is pushed upward by the fluidizing gas supplied through the air box 62.

Here, in the front wall region A1, the horizontal cross-sectional area gradually increases from the lowermost portion 66 of the inclined portion 58 toward the vertical portion 56. As a result, the velocity of the fluidizing gas in the front wall side region A1 decreases as it goes vertically upward. In other words, in the front wall side area A1, the force of pushing the material to be dried upward decreases as it goes vertically upward.

Therefore, particles having a large self-weight (particle diameter) among the pushed-up dried objects fall by their own weight before reaching the upper layer. The dropped particles roll down the slope of the inclined portion 58, and are pushed up again by the fluidizing gas in the vicinity of the lowermost portion 66 of the inclined portion 58. In this way, in the front wall side region A1, a circulating flow of the material to be dried is formed as shown by the dashed line arrow B1 in FIG. In the drying device 1, the material to be dried circulates in the front wall side region A1 of the dispersion chamber 12, so that the mixing property of the material to be dried and the fluidized gas becomes higher, and the drying of the material to be dried is further promoted.

A part of the material to be dried circulated and dried in the front wall side area A1 moves to the overflow wall side area A2 through the lower part of the lowermost portion 88 of the partition plate 70 and is pushed upward by the fluidizing gas.

As described above, in the dispersion chamber 12, the horizontal cross-sectional area of the front wall side area A1 and the horizontal cross-sectional area of the overflow wall side area A2 in the vertical portion 56 are equal. As a result, the material to be dried in the dispersion chamber 12 flows such that the height of the material to be dried in the overflow wall side area A2 is equal to the height of the material to be dried in the front wall side area A1. Specifically, when the material to be dried is charged and the layer height of the front wall side area A1 becomes high, the overflow wall side area A2 is passed under the lowermost portion 88 of the partition plate 70 so that the layer heights of both areas become equal. The amount of material to be dried that moves to is increased. As a result, the layer height of the overflow wall side region A2 rises.

At this time, if the bed height of the overflow wall side area A2 has already reached the maximum height (the top portion 30 of the overflow wall 24), as shown by the dashed line arrow B2 in FIG. Over 24 and overflow to the drying chamber 10 side. Thus, the material to be dried is supplied from the dispersion chamber 12 to the drying chamber 10 by overflow. Therefore, in the drying device 1, the amount of the material to be dried supplied to the drying chamber 10 can be made uniform in the ridge direction of the top portion 30 of the overflow wall 24.

Further, in the drying device 1, the input port 86 and the supply port 32 are separated by the partition plate 70. Therefore, in the drying device 1, it takes time for the material to be dried to reach the supply port 32 from the input port 86, and the staying time of the material to be dried in the dispersion chamber 12 is long. Therefore, the material to be dried is sufficiently predried in the dispersion chamber 12. Specifically, the water adhering to the surface of the material to be dried (surface water) is sufficiently removed in the dispersion chamber 12.

Since the surface moisture is removed from the material to be dried supplied to the drying chamber 10, even if the material to be dried comes into contact with the outer surfaces of the plurality of inner tubes 40, it does not adhere (fix). For this reason, in the drying device 1, it is possible to prevent a situation in which the gaps between the plurality of inner tubes 40 are substantially narrowed by the adhered matter to be dried and the fluidization of the matter to be dried is obstructed. As a result, the material to be dried in the drying chamber 10 is fully dried by the fluidizing gas and the plurality of inner tubes 40. Specifically, in the drying chamber 10, even the water content (inherent water content) inside the material to be dried is removed. Then, the material to be dried, which has been finally dried, moves to the feeder 44 through the gap of the air diffuser 34 and is sent out of the drying device 1.

The height of the material to be dried in the drying chamber 10 is basically controlled to be higher than that of the inner tubes 40. However, in some cases, the height of the material to be dried becomes low, and some of the inner tubes 40 may be exposed from the upper layer of the material to be dried. When the inner pipe 40 is exposed, the material to be dried supplied through the supply port 32 may directly contact the exposed inner pipe 40. In the drying device 1, since the surface moisture of the material to be dried is sufficiently removed in the dispersion chamber 12, even if the material to be dried supplied to the drying chamber 10 comes into direct contact with the inner pipe 40, the material to be dried is Does not adhere to the inner pipe 40. Therefore, in the drying device 1, it is possible to prevent a situation in which the fluidization of the material to be dried in the drying chamber 10 is hindered even if the layer height of the material to be dried becomes low.

As described above, in the drying device 1 of the present embodiment, the partition plate 70 located between the input port 86 and the supply port 32 in the dispersion chamber 12 is provided. The partition plate 70 extends below the lowermost portion of the supply port 32 and is separated from the bottom surface of the dispersion chamber 12. That is, in the drying device 1 of the present embodiment, the input port 86 of the dispersion chamber 12 and the supply port 32 of the drying chamber 10 are separated by the partition plate 70 and are not in direct communication with each other.

Therefore, in the drying device 1 according to the present embodiment, it is possible to lengthen the time that the material to be dried stays in the dispersion chamber 12. Therefore, according to the drying device 1 of the present embodiment, by pre-drying the material to be dried, it is possible to reduce the moisture attached to the material to be dried. As a result, in the drying device 1 of the present embodiment, it is possible to prevent a situation in which the material to be dried is attached to the plurality of inner tubes 40 in the drying chamber 10 and fluidization is obstructed.

Further, in the drying device of the comparative example that does not perform pre-drying, at the time of start-up, the dried material that has been stored is put into the drying device first, and then the drying object that contains water is put into the drying device. Had to do. On the other hand, in the drying device 1 of the present embodiment, the material to be dried containing water can be introduced into the dispersion chamber 12 from the start of activation. Therefore, the drying device 1 of the present embodiment can shorten the time required to start up the drying device 1 as compared with the comparative example described above.

Further, in the drying device 1 of the present embodiment, the front wall 50 on the side opposite to the overflow wall 24 with respect to the partition plate 70 is provided with the inclined portion 58 that gradually decreases the horizontal cross-sectional area in the dispersion chamber 12 toward the lower side in the vertical direction. Has been formed. Thereby, in the drying device 1 of the present embodiment, a circulation flow of the material to be dried can be formed in the front wall side area A1. Therefore, in the drying device 1 of the present embodiment, it becomes possible to sufficiently pre-dry the material to be dried.

Further, in the drying device 1 of the present embodiment, the angle of the inclined portion 58 with respect to the horizontal plane is equal to or greater than the repose angle of the material to be dried. Therefore, in the drying device 1 of the present embodiment, the material to be dried in the front wall side area A1 can be sufficiently circulated.

Further, in the drying device 1 of the present embodiment, the horizontal sectional area between the partition plate 70 and the top portion 60 of the inclined portion 58 is equal to the horizontal sectional area between the partition plate 70 and the overflow wall 24. Thereby, in the drying device 1 of the present embodiment, the difference between the pressure loss in the front wall side area A1 and the pressure loss in the overflow wall side area A2 can be minimized. Therefore, in the drying device 1 of the present embodiment, it becomes possible to smoothly supply the material to be dried from the dispersion chamber 12 to the drying chamber 10.

Further, in the drying device 1 of the present embodiment, the lowermost portion 88 of the partition plate 70 is located below the top portion 60 of the inclined portion 58. Therefore, in the drying device 1 of the present embodiment, the material to be dried in the front wall side area A1 can be sufficiently circulated.

In the drying device 1 of the present embodiment, the lowermost portion 88 of the partition plate 70 is located closer to the overflow wall 24 than the lowermost portion 66 of the inclined portion 58. Therefore, in the drying device 1 of the present embodiment, the material to be dried in the front wall side area A1 can be sufficiently circulated.

The embodiments have been described above with reference to the accompanying drawings, but it goes without saying that the present disclosure is not limited to the above embodiments. It is obvious to those skilled in the art that various changes or modifications can be conceived within the scope of the claims, and it is understood that these also belong to the technical scope of the present disclosure. To be done.

For example, in the above embodiment, the supply port 32 is provided above the overflow wall 24 (between the top portion 30 and the ceiling portion 28 of the overflow wall 24). However, the supply port 32 may be provided in the overflow wall 24 itself. That is, the supply port 32 may be formed in a part of the overflow wall 24 in the vertical direction. Also in this aspect, the material to be dried can overflow from the lowermost portion of the supply port 32 provided in the overflow wall 24 itself and can move to the drying chamber 10. In this case, the top 30 of the overflow wall 24 may be connected to the ceiling 28.

Further, in the above-described embodiment, the notch 74 is provided on the top 72 of the partition plate 70. However, the cutout portion 74 may not be provided in the partition plate 70.

Further, in the above embodiment, the charging port 86 is located below the top 72 of the partition plate 70. However, the input port 86 may be located at the same height as the top 72 of the partition plate 70. That is, the input port 86 is below the top 72 of the partition plate 70 and may be located above the lowermost part of the supply port 32.

Further, in the above-described embodiment, the top portion 72 of the partition plate 70 is located at the same height as the uppermost portion of the supply port 32. However, the top portion 72 of the partition plate 70 may be located above the uppermost portion of the supply port 32.

Further, the partition plate 70 is provided on the front wall 50 side so that the horizontal cross-sectional area between the partition plate 70 and the top 60 of the inclined portion 58 is different from the horizontal cross-sectional area between the partition plate 70 and the overflow wall 24. Alternatively, it may be arranged at a position biased toward the overflow wall 24.

Further, the lowermost portion 88 of the partition plate 70 may be located above the top portion 60 of the inclined portion 58. Further, the lowermost portion 88 of the partition plate 70 may be located closer to the front wall 50 than the lowermost portion 66 of the inclined portion 58.

The angle of the inclined portion 58 with respect to the horizontal plane may be smaller than the angle of repose of the material to be dried. Further, the top portion 60 of the inclined portion 58 may be located above the top portion 30 of the overflow wall 24. Further, the inclined portion 58 may not be provided on the front wall 50.

The present disclosure can be used for a drying device.

1 Drying Device 10 Drying Chamber 12 Dispersion Chamber 24 Overflow Wall 30 Top 32 Supply Port 50 Front Wall 58 Sloping Part 60 Top 66 Bottom 70 Partition Plate 72 Top 86 Input 88 Bottom

Claims (6)

A drying room,
A dispersion chamber provided adjacent to the drying chamber,
A first gas supply unit for supplying a fluidizing gas to the drying chamber;
A second gas supply unit for supplying a fluidizing gas to the dispersion chamber;
An overflow wall separating the drying chamber and the dispersion chamber,
Above the overflow wall, or on the overflow wall itself, a supply port that connects the drying chamber and the dispersion chamber,
An input port that communicates the inside and the outside of the dispersion chamber, and is located above the lowermost portion of the supply port,
A partition plate that is located between the input port and the supply port in the dispersion chamber, extends below the lowermost portion of the supply port, and is provided separately from the bottom surface of the dispersion chamber,
A drying device equipped with. The drying device according to claim 1, further comprising an inclined portion that is provided on the opposite side of the partition plate from the overflow wall and that gradually reduces a horizontal cross-sectional area in the dispersion chamber toward a vertically downward direction. The drying device according to claim 2, wherein an angle of the inclined portion with respect to a horizontal plane is equal to or greater than an angle of repose of the dried object. The drying device according to claim 2, wherein a horizontal cross-sectional area between the partition plate and the top of the inclined portion is equal to a horizontal cross-sectional area between the partition plate and the overflow wall. The lowest part of the said partition board is a drying apparatus as described in any one of Claim 2 to 4 located below the top part of the said inclination part. The drying device according to any one of claims 2 to 5, wherein a lowermost portion of the partition plate is located closer to the overflow wall than a lowermost portion of the inclined portion.

Images