JP7225727B2 - drying equipment - Google Patents

Description

The present disclosure relates to drying apparatus.

Patent Literature 1 discloses a fluidized bed drying apparatus that dries by fluidizing the material to be dried in the drying chamber. In such technology, the preliminary drying chambers are connected via overflow weirs that form the drying chambers. An 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 for the material to be dried is also connected to the drying chamber, the material to be dried that has been input may move into the drying chamber without sufficiently staying in the preliminary drying chamber. be. For this reason, in such techniques, the material to be dried may not be sufficiently pre-dried.

An object of the present disclosure is to provide a drying apparatus capable of reducing moisture adhering 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. a second gas supply unit that supplies a fluidizing gas to the dispersion chamber; an overflow wall that separates the drying chamber from the dispersion chamber; a supply port that communicates with the inside and outside of the dispersion chamber and is positioned above the lowest part of the supply port; A partition plate that extends downward and is spaced apart from the bottom surface of the dispersion chamber, and a partition plate that is provided on the opposite side of the partition plate to the overflow wall and gradually decreases the horizontal cross-sectional area in the dispersion chamber vertically downward. The drying chamber is provided with a plurality of inner pipes to which a heat medium is supplied, and the dispersion chamber is not provided with a plurality of inner pipes, and the partition plate and the inclined portion and the horizontal cross-sectional area between the partition plate and the overflow wall are equal .

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

Also, the lowermost portion of the partition plate may be positioned below the top portion of the inclined portion.

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

According to the present disclosure, it is possible to reduce the moisture adhering to the material to be dried.

It is a see-through|perspective perspective view which shows the structure of a drying apparatus. It is a sectional view showing composition of a dryer.

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

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

The drying apparatus 1 comprises a drying chamber 10 and a dispersing chamber 12 . The dispersion chamber 12 is a pre-drying chamber for pre-drying (pre-drying) the material to be dried containing moisture. 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 .

Drying chamber 10 includes body 20 and tapered portion 22 . The main body 20 is formed like a hollow box. Body 20 is bounded by an overflow wall 24 and three side walls 26 . Overflow wall 24 and sidewall 26 extend vertically. The dispersion chamber 12 is provided adjacent to the drying chamber 10 with an overflow wall 24 interposed therebetween. An overflow wall 24 separates the drying chamber 10 and the dispersion chamber 12 .

The tops of the side walls 26 are connected to a ceiling 28 that closes the main body 20 . Overflow wall 24 has a lower vertical height than side wall 26 and is not connected to ceiling 28 . In other words, a supply port 32 is formed between the top portion 30 of the overflow wall 24 and the ceiling portion 28 to allow the drying chamber 10 and the dispersion chamber 12 to communicate with each other. The bottom of the feed port 32 corresponds to the top 30 of the overflow wall 24 and the top of the feed port 32 corresponds to the ceiling 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 fed from the distribution chamber 12 to the drying chamber 10 through a feed opening 32, ie over the top 30 of the overflow wall 24. As shown in FIG.

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

Fluidizing gas (steam) is supplied to the air diffuser 34 from a fluidizing gas supply source 36 such as a boiler. A diffuser pipe 34 supplies the fluidizing gas into the drying chamber 10 . In other words, the diffuser pipe 34 and the fluidizing gas supply source 36 function as a first gas supply section 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 to fluidize 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 fluidizing gas supplied into the drying chamber 10 contacts the material to be dried in the drying chamber 10, thereby drying the material to be dried by the heat of the fluidizing 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 fluidizing gas that rises in the drying chamber 10 is sent out through the opening 38 to the pipe 39 (outside the drying apparatus 1). Fine particles (dust) generated from the material to be dried are delivered to the pipe 39 along with the fluidizing gas. Fluidizing gas with fine particles is sent through line 39 to the cyclone. A cyclone removes fine particles from the fluidizing gas. The fluidized gas from which fine particles have been removed is sent to the air diffusion pipe 34 and the like (the inner pipe 40 and the wind box 62, which will be described later), and is reused.

A plurality of inner tubes 40 are provided in the main body 20 . The plurality of inner tubes 40 are horizontal and extend parallel to each other in a direction intersecting the diffuser tube 34 . The plurality of inner tubes 40 are arranged apart from each other in the vertical direction and the extending direction of the diffuser tube 34 . Also, the plurality of inner pipes 40 are arranged in a range vertically above the diffuser pipe 34 and vertically below the top portion 30 of the overflow wall 24 . Both ends of the plurality of inner tubes 40 are assembled with headers 42, respectively.

A heat medium is supplied to the plurality of inner pipes 40 through headers 42 . Specifically, steam at 100° C. or higher is supplied from the fluidizing gas supply source 36 to the plurality of inner pipes 40 as a heat medium. That is, steam is used here as both the fluidizing gas and the heat medium. A plurality of inner tubes 40 conduct heat of the heating 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 diffuser pipe 34 and the heat transfer through the plurality of inner pipes 40, and the drying of the material to be dried is accelerated. be.

A lower portion of the tapered portion 22 is connected to the feeder 44 . 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 of the plurality of diffuser pipes 34 . The feeder 44 delivers (extracts) the dried material to the outside of the drying device 1 .

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

The dispersion chamber 12 is formed in the shape of a hollow box. The dispersion chamber 12 is bounded by an overflow wall 24 , a front wall 50 and two side walls 52 shared with the drying chamber 10 . Overflow wall 24, front wall 50 and side walls 52 extend vertically.

The top of the front wall 50 and the top of the side walls 52 are level with the top of the side walls 26 of the drying chamber 10 . The top of the front wall 50 and the top of the side walls 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 has a lower vertical height than the front wall 50 and the side walls 52 and is not connected to the ceiling portion 54 .

The front wall 50 is spaced in a facing direction relative to the overflow wall 24 . In other words, the front wall 50 is provided on the side opposite to the overflow wall 24 with respect to the later-described partition plate 70 . The front wall 50 is composed of a vertical portion 56 and an inclined portion 58 . The vertical portion 56 is positioned at the upper portion of the front wall 50 and extends vertically. The inclined portion 58 is positioned at the lower portion of the front wall 50 and continues to 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 60 of the ramp 58 is located below the top 30 of the overflow wall 24 .

The inclined portion 58 is inclined so as to gradually decrease the horizontal cross-sectional area in the dispersion chamber 12 downward in the vertical direction. The inclined portion 58 has an inclination angle greater than or equal to the repose angle of the material to be dried with respect to the horizontal plane. 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 like a hollow box. The upper part of the wind box 62 is formed with 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 . A plurality of standing nozzles 68 are provided on the dispersion plate 64 at predetermined intervals. The nozzle 68 is provided with an aperture having a diameter smaller than the particle size of the material to be dried. The opening of the nozzle 68 allows the inside of the wind box 62 and the inside of the dispersion chamber 12 to communicate with each other with the dispersion plate 64 interposed therebetween. Windbox 62 is supplied with fluidizing gas (steam) from fluidizing gas supply 36 . Windbox 62 uniformly supplies fluidizing gas into dispersion chamber 12 through a plurality of nozzles 68 . That is, the windbox 62 and the fluidizing gas supply source 36 function as a second gas supply that supplies the fluidizing gas to the dispersion chamber.

A vertically extending partition plate 70 is provided in the dispersion chamber 12 . The partition plate 70 is provided parallel to the overflow wall 24 . A top portion 72 of the partition plate 70 is positioned at the same height as the top portions of the front wall 50 and side walls 52 and is connected to the ceiling portion 54 . A top portion 72 of the partition plate 70 is positioned at the same height as the top of the supply port 32 (the ceiling portions 28 and 54). The partition plate 70 extends below the top portion 30 of the overflow wall 24 (the lowest portion of the supply port 32). The partition plate 70 is provided from one side wall 52 to the other side wall 52 .

The partition plate 70 separates the area on the front wall 50 side and the area 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 a front wall side area A1. Also, the area between the partition plate 70 and the overflow wall 24 may be called an overflow wall side area A2.

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

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

An opening 76 is provided on the front wall 50 side of the partition plate 70 in the ceiling portion 54 . A hopper 80 is connected to the opening 76 . Hopper 80 includes a tapered portion 82 and a skirt portion 84 . The tapered 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 tubular shape and extends in the vertical direction. One end of the skirt portion 84 continues to the lower portion of the tapered portion 82 . The end of the skirt portion 84 opposite to the tapered portion 82 is inserted into the dispersion chamber 12 through the opening 76 .

An inlet 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 communicates the inside and outside of the dispersion chamber 12 through the hopper 80 . The inlet 86 is located below the top 72 of the partition plate 70 . Specifically, the inlet 86 is located below the lower end of the notch 74 of the partition plate 70 . Also, the inlet 86 is located closer to the front wall 50 than the partition plate 70 is. In other words, the partition plate 70 is positioned horizontally between the input port 86 and the supply port 32 .

Moisture-containing material to be dried (eg, lignite) is introduced into the dispersion chamber 12 through a hopper 80 and an inlet 86 . For example, a predetermined amount of material to be dried per unit time (eg, 30 t/h) is continuously fed into the dispersion chamber 12 .

A lowermost portion 88 of the partition plate 70 is separated from the dispersion plate 64 (the 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 area A1 and the overflow wall side area A2 communicate with each other. Therefore, the material to be dried put into the front-wall-side area A1 can move to the overflow-wall-side area A2 through below the lowermost 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 is equal to or less than a predetermined value. .

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

Also, the lowermost portion 88 of the partition plate 70 is positioned below the top portion 60 of the inclined portion 58 . In addition, 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 is.

As mentioned above, the windbox 62 is supplied with fluidizing gas. The fluidizing gas supplied to the dispersion chamber 12 through the wind 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 contacts the material to be dried in the dispersion chamber 12, thereby drying the material to be dried by the heat of the fluidizing gas. The fluidizing gas in the dispersion chamber 12 is delivered to the pipe 39 through the notch 74 , the supply port 32 and the opening 38 . An opening connected to the pipe 39 may be formed in the ceiling portion 54 of the dispersion chamber 12 .

The dispersion chamber 12 is supplied with, for example, a fluidizing gas having the same conditions as the fluidizing gas supplied to the drying chamber 10 . 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 is higher than the superficial velocity 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. FIG. In addition, in the drying chamber 10, since heat is transferred by the plurality of inner tubes 40, the material to be dried can be dried above the dispersion chamber 12 even if the superficial velocity is low.

Next, the operation of the drying device 1 will be explained. The material to be dried is introduced into the front wall side area A1 of the dispersion chamber 12 through the inlet 86 . The material to be dried deposited on the front wall side area A1 is pushed upward by the fluidizing gas supplied through the wind 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 shown in FIG. As a result, the velocity of the fluidizing gas in the front-wall-side region A1 decreases as it travels vertically upward. That is, in the front wall side area A1, the force for pushing up the material to be dried decreases as it goes vertically upward.

For this reason, particles having a large dead weight (particle size) among the objects to be dried that have been pushed up fall by their own weight before reaching the upper layer. The fallen particles roll down the slope of the inclined portion 58 and are pushed upward again by the fluidizing gas near the lowest portion 66 of the inclined portion 58 . In this manner, a circulation flow of the material to be dried is formed in the front wall side area A1, as indicated by the dashed-dotted arrow B1 in FIG. In the drying apparatus 1, since the material to be dried circulates in the front wall side area A1 of the dispersion chamber 12, the mixture of the material to be dried and the fluidizing gas is further improved, and the drying of the material to be dried is further promoted.

Part of the material to be dried that has been circulated and dried in the front wall area A1 moves to the overflow wall area A2 through 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 so that the layer height of the material to be dried in the overflow wall side area A2 and the layer height of the material to be dried in the front wall side area A1 are equal. Specifically, when the material to be dried is put in and the layer height of the front wall side region A1 increases, the overflow wall side region A2 passes through below the lowermost portion 88 of the partition plate 70 so that the layer heights of both regions become equal. the amount of material to be dried that migrates to the As a result, the layer height of the overflow wall side region A2 is increased.

At this time, if the layer height of the overflow wall side region A2 has already reached the maximum height (the top portion 30 of the overflow wall 24), as indicated by the dashed-dotted arrow B2 in FIG. 24 and overflows to the drying chamber 10 side. Thus, the material to be dried is supplied from the dispersing chamber 12 to the drying chamber 10 by overflow. Therefore, in the drying apparatus 1 , the amount of material to be dried supplied to the drying chamber 10 can be made uniform in the ridge line direction of the top portion 30 of the overflow wall 24 .

Moreover, in the drying device 1 , the inlet 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 residence time of the material to be dried in the dispersion chamber 12 is long. Therefore, the material to be dried is sufficiently pre-dried in the dispersion chamber 12 . Specifically, moisture (surface moisture) adhering to the surface of the material to be dried is sufficiently removed in the dispersion chamber 12 .

The material to be dried supplied to the drying chamber 10 does not adhere (stick) to the outer surfaces of the plurality of inner tubes 40 even if it comes in contact with the outer surfaces of the plurality of inner tubes 40 because surface moisture has been removed. Therefore, in the drying apparatus 1, it is possible to prevent a situation in which the adhering material to be dried substantially narrows the gaps between the plurality of inner tubes 40 and hinders the fluidization of the material to be dried. 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 moisture (inherent moisture) inside the material to be dried is removed. Then, the material to be dried that has undergone main drying moves to the feeder 44 through the gaps of the air diffusion pipe 34 and is sent out of the drying apparatus 1 .

Moreover, the layer height of the material to be dried in the drying chamber 10 is basically controlled to be higher than that of the plurality of inner tubes 40 . However, in some cases, the layer 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 tube 40 is exposed, the material to be dried supplied through the supply port 32 may come into direct contact with the exposed inner tube 40 . In the drying apparatus 1, since the moisture on the surface 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 directly contacts the inner tube 40, the material to be dried does not adhere to the inner tube 40. Therefore, in the drying apparatus 1, even if the layer height of the material to be dried becomes low, it is possible to prevent the fluidization of the material to be dried in the drying chamber 10 from being hindered.

As described above, in the drying apparatus 1 of the present embodiment, the partition plate 70 is provided between the inlet 86 and the supply port 32 in the dispersion chamber 12 . The partition plate 70 extends below the bottom of the supply port 32 and is separated from the bottom surface of the dispersion chamber 12 . That is, in the drying apparatus 1 of this embodiment, the inlet 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.

Therefore, in the drying apparatus 1 of this embodiment, the time for which the material to be dried stays in the dispersion chamber 12 can be extended. Therefore, according to the drying apparatus 1 of the present embodiment, by pre-drying the material to be dried, it is possible to reduce the amount of water adhering 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 adheres to the plurality of inner tubes 40 in the drying chamber 10 and hinders fluidization.

In addition, in the drying apparatus of the comparative example that does not perform pre-drying, at the time of startup, the material to be dried that has been dried and stored is first put into the drying apparatus, and then the material to be dried containing moisture is put into the drying apparatus. I had to. On the other hand, the drying apparatus 1 of the present embodiment can put the material to be dried containing moisture into the dispersion chamber 12 from the start of activation. Therefore, the drying device 1 of the present embodiment can shorten the time required for starting the drying device 1 as compared with the comparative example described above.

In addition, in the drying apparatus 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 has an inclined portion 58 that gradually decreases the horizontal cross-sectional area in the dispersion chamber 12 vertically downward. formed. Thereby, in the drying apparatus 1 of this 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 is possible to sufficiently pre-dry the material to be dried.

Further, in the drying apparatus 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 angle of repose of the material to be dried. Therefore, in the drying apparatus 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 apparatus 1 of the present embodiment, the horizontal cross-sectional area between the partition plate 70 and the top portion 60 of the inclined portion 58 is equal to the horizontal cross-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 apparatus 1 of the present embodiment, it is possible to smoothly supply the material to be dried from the dispersion chamber 12 to the drying chamber 10 .

Further, in the drying apparatus 1 of the present embodiment, the lowermost portion 88 of the partition plate 70 is positioned below the top portion 60 of the inclined portion 58 . Therefore, in the drying apparatus 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 apparatus 1 of the present embodiment, the lowermost portion 88 of the partition plate 70 is positioned closer to the overflow wall 24 than the lowermost portion 66 of the inclined portion 58 is. Therefore, in the drying apparatus 1 of the present embodiment, the material to be dried in the front wall side area A1 can be sufficiently circulated.

Although the embodiments have been described above with reference to the accompanying drawings, it goes without saying that the present disclosure is not limited to the above embodiments. It is clear that a person skilled in the art can conceive of various modifications or modifications within the scope of the claims, and it is understood that these also belong to the technical scope of the present disclosure. be done.

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

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

Further, in the above-described embodiment, the inlet 86 was located below the top portion 72 of the partition plate 70 . However, the inlet 86 may be positioned at the same height as the top 72 of the partition plate 70 . In other words, the input port 86 may be located below the top portion 72 of the partition plate 70 and above the lowest portion of the supply port 32 .

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

Further, the partition plate 70 is arranged on the front wall 50 side so that the horizontal cross-sectional area between the partition plate 70 and the top portion 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 side.

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

Also, 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. Also, the apex 60 of the ramp 58 may be located above the apex 30 of the overflow wall 24 . Also, the inclined portion 58 may not be provided on the front wall 50 .

INDUSTRIAL APPLICABILITY The present disclosure can be used for drying equipment.

1 drying device 10 drying chamber 12 dispersion chamber 24 overflow wall 30 top 32 supply port 50 front wall 58 inclined portion 60 top 66 bottom 70 partition plate 72 top 86 inlet 88 bottom

Claims (4)

a drying room;
a dispersion chamber adjacent to the drying chamber;
a first gas supply unit that supplies a fluidizing gas to the drying chamber;
a second gas supply unit that supplies a fluidizing gas to the dispersion chamber;
an overflow wall separating the drying chamber and the dispersion chamber;
a supply port provided above the overflow wall or on the overflow wall itself and communicating between the drying chamber and the dispersion chamber;
an inlet located above the lowermost part of the supply port and communicating between the inside and the outside of the dispersion chamber;
a partition plate located between the input port and the supply port in the dispersion chamber, extending below the lowest portion of the supply port, and spaced apart from the bottom surface of the dispersion chamber;
an inclined portion provided on the side opposite to the overflow wall with respect to the partition plate for gradually decreasing the horizontal cross-sectional area in the dispersion chamber vertically downward;
with
The drying chamber is provided with a plurality of inner pipes to which a heat medium is supplied, and the dispersion chamber is not provided with the plurality of inner pipes,
A dryer in which the horizontal cross-sectional area between said partition and the top of said ramp is equal to the horizontal cross-sectional area between said partition and said overflow wall. 2. The drying apparatus according to claim 1 , wherein said inclined portion has an angle with respect to a horizontal plane equal to or greater than the angle of repose of the material to be dried. 3. The drying apparatus according to claim 1 , wherein the lowermost portion of said partition plate is located below the top portion of said inclined portion. 4. The drying apparatus according to any one of claims 1 to 3 , wherein the lowermost part of the partition plate is positioned closer to the overflow wall than the lowermost part of the inclined portion.

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