JP6095993B2 - Raw material supply apparatus and method, and fluidized bed drying apparatus - Google Patents

Description

  The present invention relates to a raw material supply apparatus and method for supplying a raw material into a container from above, and a fluidized bed drying apparatus that dries while flowing wet fuel as a raw material with a fluidizing gas.

  For example, a coal gasification combined cycle power generation facility that gasifies solid carbonaceous fuel such as coal as a raw material can be combined with combined cycle power generation to further increase efficiency and increase efficiency compared to conventional coal thermal power generation. It is a power generation facility aimed at environmental friendliness. This coal gasification combined cycle power generation facility has a great merit that it can use coal with abundant resources, and it is known that the merit can be further increased by expanding the applicable coal types.

  Conventional coal gasification combined power generation facilities generally include coal supply equipment, drying equipment, grinding equipment, coal gasification furnace, gas purification equipment, gas turbine equipment, steam turbine equipment, exhaust heat recovery boiler, gas purification equipment, etc. have. Therefore, the coal is dried and then pulverized, supplied to the coal gasifier as pulverized coal, and air is taken in. The coal gas is combusted and gasified in this coal gasifier, and the product gas (combustible) Gas) is produced. Then, the product gas is purified and then supplied to the gas turbine equipment to burn and generate high-temperature and high-pressure combustion gas to drive the turbine. The exhaust gas after driving the turbine recovers thermal energy by the exhaust heat recovery boiler, generates steam and supplies it to the steam turbine equipment, and drives the turbine. As a result, power generation is performed. On the other hand, the exhaust gas from which the thermal energy has been recovered is released into the atmosphere through a chimney after harmful substances are removed by the gas purification device.

  In a coal drying apparatus used for such a coal gasification combined power generation facility, a fluidized bed drying apparatus is generally applied. This fluidized bed drying apparatus dries while flowing coal with fluidized gas. In such a fluidized bed drying apparatus, it is necessary to uniformly supply coal to the upper part of the fluidized bed. As such a dispersing device, there is one described in the following patent document. In the dispersing apparatus described in Patent Document 1, an inclined charging path is rotatably supported with a base end portion as a fulcrum, an edge is provided at the rear of the charging path, and a long flat smooth surface having a linear long side. And a side that is substantially S-shaped. Further, in the diffusion throwing device described in Patent Document 2, a diffusion plate is rotatably supported, and a diffusion unit having a long distance and a diffusion unit having a short distance are provided.

US Pat. No. 4,921,086 JP 2001-046971 A

  In the conventional dispersing apparatus described in Patent Document 1 described above, the inclined charging path is a cantilever support, and the raw material is supplied to a long and smooth surface of the charging path. It must be firmly supported, and the support mechanism and the rotational drive mechanism become large, leading to an increase in size and cost of the apparatus. In addition, in order to supply the raw material in a distributed manner to the upper part of the fluidized bed by the charging path, and to supply more uniformly, the inclination angle of this charging path becomes nearly horizontal, and there is a concern about the adhesion of the raw material to the charging path, Stable supply of raw materials becomes difficult. Further, in the conventional diffusion charging apparatus described in Patent Document 2 described above, since each diffusion portion of the diffusion plate is horizontal, the raw material is distributed and supplied to the upper part of the fluidized bed, and supplied more uniformly. Difficult to do.

  SUMMARY OF THE INVENTION The present invention solves the above-described problems, and suppresses the enlargement of the apparatus, while supplying the raw material to the fluidized bed drying apparatus in a distributed manner, thereby enabling a more uniform supply. The purpose is to provide. In addition, the present invention provides a fluidized bed drying apparatus that suppresses an increase in the size of the apparatus and distributes and supplies wet fuel to the fluidized bed, thereby enabling more uniform supply and improving drying efficiency. For the purpose.

  In order to achieve the above object, the raw material supply apparatus of the present invention is a cone that is rotatably supported by a rotating shaft that hangs down in the vertical direction at the upper part of a container and has a horizontal cross-sectional area increased downward. A disperser that has a shape and a radial surface length that is continuously different in the circumferential direction, a raw material supply unit that can supply a raw material from the upper part of the container toward the disperser, and the disperser can be rotated And a rotary drive device.

Therefore, since the disperser has a conical shape with an increased cross-sectional area in the horizontal direction and the surface length in the radial direction is continuously different in the circumferential direction, the disperser is rotated by the rotary drive device, and the raw material supply unit When a powdery raw material is supplied to the disperser, the raw material descends in the radial direction on the surface of the rotating disperser and falls from the lower end. At this time, since the raw material falls while being moved radially outward by the centrifugal force of the rotating disperser and falls at a position where the surface length in the radial direction is different, the raw material is supplied uniformly. In addition, the enlargement of the apparatus can be suppressed.
Here, the powdery form as the raw material is not in a liquid form, and is not a large solid size of several cm or more due to an uncrushed state or the like. The raw material may be in a wet state containing water, and a material that has become a certain amount of mass due to wetting is also included in powder form.

  In the raw material supply apparatus of the present invention, the disperser is characterized in that a surface length in the radial direction becomes longer along a circumferential direction.

  Therefore, since the raw material moves outward in the radial direction by the centrifugal force of the rotating disperser and falls at different positions at the end portions in the radial direction, the raw material can be supplied more uniformly dispersed.

  In the raw material supply apparatus of the present invention, the disperser is characterized in that a guide member is provided on the surface along the radial direction at a position where the surface length in the radial direction is the longest.

  Therefore, the raw material supplied to the surface of the rotating disperser descends in the radial direction and falls from the lower end. At this time, the raw material at the position where the surface length in the radial direction is the longest is guided by the guide member. Therefore, the amount of material falling in the middle of the surface of the disperser is reduced, and the raw material can be supplied more uniformly dispersed.

  In the raw material supply apparatus of the present invention, a plurality of the guide members are provided at predetermined intervals in the circumferential direction.

  Therefore, since the raw material supplied to the surface of the rotating disperser descends while being guided in the radial direction by each guide member, there are few things that fall locally, and the raw material is more uniformly dispersed and supplied. be able to.

  In the raw material supply apparatus of the present invention, the disperser has a conical shape.

  Accordingly, since the disperser has a conical shape, the raw material supplied to the surface of the rotating disperser is properly lowered on the surface and dropped, and the raw material can be distributed more uniformly. .

  In the raw material supply apparatus of the present invention, a raw material supply path along the vertical direction is provided as the raw material supply section, and the rotating shaft of the disperser is arranged along the center of the raw material supply path.

  Therefore, by disposing the rotating shaft of the disperser along the center portion of the raw material supply path, the apparatus can be made compact and the raw material can be supplied to the disperser appropriately.

  In the raw material supply apparatus of the present invention, the disperser includes a hollow portion inside the cone shape, a drying gas supply device that supplies a drying gas to the hollow portion, and a drying gas from the hollow portion to the surface side. It has a plurality of drying gas jetting parts that can be jetted.

  Therefore, when the drying gas supply device supplies the drying gas to the hollow portion provided inside the conical shape, the drying gas is ejected from the plurality of drying gas ejection portions to the surface of the disperser, Even if the water content of the raw material supplied to the surface of the disperser is high, drying of this raw material is promoted by the drying gas, preventing the raw material from adhering to the surface of the disperser, and supplying the raw material properly. Can be done.

  In the raw material supply apparatus according to the present invention, the plurality of drying gas ejection portions are arranged in a circumferential direction of the disperser, whereby the rotation driving device is configured.

  Accordingly, since the drying gas is ejected from the plurality of drying gas ejection portions toward the circumferential direction of the cone shape, the disperser can be rotated by obtaining a propulsion force by the sprayed drying gas, and separately. It is not necessary to provide a rotation driving device, or the driving force required for rotation can be reduced, and the structure can be simplified.

  In the raw material supply apparatus of the present invention, the disperser is supported so as to be movable along a vertical direction, and a vertical movement device capable of moving the disperser in the vertical direction is provided.

  Therefore, since the disperser can be moved along the vertical direction by the vertical movement device, it is possible to adjust the position where the raw material is dispersed and supplied as needed, thereby making the dispersion of the raw material more appropriate. Can be supplied.

  In addition, the raw material supply method of the present invention has a conical shape in which the horizontal cross-sectional area is increased downward, and a disperser whose surface length in the radial direction is continuously different in the circumferential direction is rotated along the vertical direction. And a step of rotating by a shaft and a step of supplying a powdery raw material from above to the surface of the disperser.

  Therefore, since the raw material falls while being moved radially outward by the centrifugal force of the rotating disperser and falls at a position where the radial surface length is different, the raw material is supplied more uniformly. In addition, the enlargement of the apparatus can be suppressed.

  The fluidized bed drying apparatus of the present invention has a hollow shape as the container, a drying container in which a wet fuel supply device is provided on one end side and a dry matter discharge part is provided on the other end side, and the drying container is wetted A partition member in which fuel is divided in a flow direction toward the dry matter discharge section to form a plurality of divided drying chambers and a wet fuel passage opening is formed, and a fluidized gas from below the plurality of divided drying chambers In a fluidized bed drying apparatus having a fluidized gas supply apparatus that forms a fluidized bed together with a wet raw material by supplying the raw material, the raw material supply apparatus is applied as the wet fuel supply apparatus .

  Therefore, when the wet fuel supply device supplies the powdered wet fuel to the drying container, the wet fuel falls while being moved radially outward by the centrifugal force of the rotating disperser, and the radial fuel Since it falls at a position where the surface length is different, the wet fuel can be supplied more uniformly to the fluidized bed, and an increase in the size of the apparatus can be suppressed.

  In the fluidized bed drying apparatus of the present invention, based on the fluidized bed state detection sensor that detects the state of a plurality of regions in which the fluidized bed is divided for each predetermined size, and the detection results of the plurality of fluidized bed state detection sensors. And a control device for controlling at least one of a rotational speed of the disperser and a vertical movement of the vertical movement device by the rotation driving device.

  Accordingly, the control device controls the rotational speed of the disperser based on the state of each region in the fluidized bed detected by the plurality of fluidized bed state detection sensors. Moreover, you may control the change of the pattern which moves up and down of the vertical direction of a vertical movement apparatus. In this case, for example, at least one of the rotational speed of the disperser and the vertical movement pattern of the vertical movement device is adjusted so that the temperature and pressure as the state of each region in the fluidized bed are uniform, and the wet fuel is supplied. The wet fuel can be efficiently dried by adjusting the position.

  According to the raw material supply apparatus and method of the present invention, it is possible to rotate a disperser whose radial surface length is different in the circumferential direction by forming a conical shape in which a horizontal sectional area is increased downward. Since the raw material supply unit capable of supplying the raw material toward the disperser is provided, the raw material can be supplied more uniformly and the increase in size of the apparatus can be suppressed.

  Also, according to the fluidized bed drying apparatus of the present invention, a plurality of divided drying chambers are formed in a drying container having a wet fuel supply device, and a fluidized bed is formed with wet fuel by supplying fluidized gas. And since a raw material supply apparatus is applied as a wet fuel supply apparatus, while being able to supply the wet fuel to a fluidized bed more uniformly, the enlargement of an apparatus can be suppressed.

FIG. 1 is a schematic diagram illustrating a fluidized bed drying apparatus according to Embodiment 1 of the present invention. FIG. 2 is a schematic diagram illustrating a raw coal supply apparatus in the fluidized bed drying apparatus of the first embodiment. FIG. 3 is a front view of a disperser in the raw coal supply apparatus. FIG. 4 is a plan view of a disperser in the raw coal supply apparatus. FIG. 5 is a development view of the disperser in the raw coal supply apparatus. FIG. 6 is a schematic configuration diagram illustrating a coal gasification combined power generation facility to which the fluidized bed drying apparatus of Example 1 is applied. FIG. 7 is a schematic diagram illustrating a raw coal supply apparatus in a fluidized bed drying apparatus according to Embodiment 2 of the present invention. FIG. 8 is a front view of a disperser in the raw coal supply apparatus. FIG. 9 is a schematic diagram illustrating a raw coal supply apparatus in a fluidized bed drying apparatus according to Embodiment 3 of the present invention. FIG. 10 is a plan view of a disperser in the raw coal supply apparatus. FIG. 11 is a schematic diagram illustrating a raw coal supply apparatus in a fluidized bed drying apparatus according to Embodiment 4 of the present invention. FIG. 12 is a front view of a disperser in the raw coal supply apparatus. FIG. 13 is a plan view of a disperser in the raw coal supply apparatus. FIG. 14 is a schematic diagram showing a fluidized bed drying apparatus according to Example 5 of the present invention. FIG. 15 is a schematic diagram illustrating a fluidized bed drying apparatus according to Embodiment 6 of the present invention.

  Exemplary embodiments of a raw material supply apparatus and method and a fluidized bed drying apparatus according to the present invention will be described below in detail with reference to the accompanying drawings. In addition, this invention is not limited by this Example, Moreover, when there exists multiple Example, what comprises combining each Example is also included.

  1 is a schematic diagram illustrating a fluidized bed drying apparatus according to Example 1 of the present invention, FIG. 2 is a schematic diagram illustrating a raw coal supply apparatus in the fluidized bed drying apparatus of Example 1, and FIG. 3 is a raw coal supply. 4 is a front view of the disperser in the apparatus, FIG. 4 is a plan view of the disperser in the raw coal supply apparatus, FIG. 5 is a development view of the disperser in the raw coal supply apparatus, and FIG. It is a schematic block diagram showing the coal gasification combined cycle facility to which the apparatus was applied.

  Example 1 is an integrated coal gasification combined cycle (IGCC) that gasifies solid carbonaceous fuel such as coal as a raw material. The coal gasification combined cycle facility gasifies air as an oxidizing agent. An air combustion system for generating coal gas in a furnace is adopted, and coal gas after purification by a gas purification device is supplied as fuel gas to gas turbine equipment for power generation. That is, the coal gasification combined power generation facility of Example 1 shows an air combustion type (air blowing) power generation facility as an example, but an oxygen blowing method using a gas having a high oxygen concentration as an oxidant may be used.

  In Example 1, as shown in FIG. 6, the coal gasification combined power generation facility 10 includes a coal supply device 11, a fluidized bed drying device 12, a pulverized coal machine (mill) 13, a coal gasification furnace 14, and a char recovery device 15. , A gas refining device 16, a gas turbine facility 17, a steam turbine facility 18, a generator 19, and a heat recovery steam generator (HRSG) 20.

  The coal feeder 11 includes a raw coal bunker 21, a coal feeder 22, and a crusher 23. The raw coal bunker 21 can store coal and can drop a predetermined amount of coal into the coal feeder 22. The coal feeder 22 can transport the coal dropped from the raw coal bunker 21 by a conveyor or the like and drop it on the crusher 23. The crusher 23 can pulverize the dropped coal into a predetermined size to form powdery raw coal. The raw coal powder is not in a liquid form and is not a large solid size of several centimeters or more due to an uncrushed state. Since the coal in the present embodiment is in a wet state containing water, the crushed raw coal is expressed as a powder, including those that have become a certain mass.

  The fluidized bed drying device 12 supplies fluidized steam (fluidized gas) to the raw coal introduced by the coal feeder 11 so as to heat and dry the coal while flowing. Water contained in the raw raw coal can be removed. The fluidized bed drying device 12 is provided with a cooler 31 that cools the extracted dry coal, and the dry coal is stored in the dry coal bunker 32. Further, the fluidized bed drying apparatus 12 is provided with a cyclone 33 and an electric dust collector 34 for separating dry coal particles from the extracted steam, and the dry coal particles separated from the steam are stored in the dry coal bunker 32. The steam from which the dry coal is separated by the electric dust collector 34 is compressed by the compressor 35 and then supplied to the fluidized bed drying device 12 as fluidized steam.

  The pulverized coal machine 13 is a coal pulverizer, and pulverizes coal (dried coal) dried by the fluidized bed dryer 12 into fine particles to produce pulverized coal. That is, in the pulverized coal machine 13, the dry coal stored in the dry coal bunker 32 is dropped by the coal feeder 36, and the dry coal is converted into pulverized coal having a predetermined particle size or less. The pulverized coal after being pulverized by the pulverized coal machine 13 is separated from the transfer gas by the bag filters 37a and 37b and stored in the supply hoppers 38a and 38b.

  The coal gasification furnace 14 can supply pulverized coal processed by the pulverized coal machine 13 and can be recycled by returning the char (unburned coal) recovered by the char recovery device 15. .

  That is, the coal gasification furnace 14 is connected to the compressed air supply line 41 from the gas turbine equipment 17 (compressor 61), and can supply compressed air compressed by the gas turbine equipment 17. The air separation device 42 separates and generates nitrogen and oxygen from air in the atmosphere, and a first nitrogen supply line 43 is connected to the coal gasification furnace 14, and a supply hopper 38 a, Charging lines 44a and 44b from 38b are connected. The second nitrogen supply line 45 is also connected to the coal gasification furnace 14, and the char return line 46 from the char recovery device 15 is connected to the second nitrogen supply line 45. Further, the oxygen supply line 47 is connected to the compressed air supply line 41. In this case, nitrogen is used as a carrier gas for coal and char, and oxygen is used as an oxidant.

  The coal gasification furnace 14 is, for example, a spouted bed type gasification furnace, which combusts and gasifies coal, char, air (oxygen) supplied therein or water vapor as a gasifying agent, and produces carbon dioxide. A combustible gas (product gas, coal gas) containing carbon as a main component is generated, and a gasification reaction takes place using this combustible gas as a gasifying agent. The coal gasification furnace 14 is provided with a foreign matter removing device 48 that removes foreign matter mixed with pulverized coal. In this case, the coal gasification furnace 14 is not limited to the spouted bed gasification furnace, and may be a fluidized bed gasification furnace or a fixed bed gasification furnace. The coal gasification furnace 14 is provided with a gas generation line 49 for combustible gas toward the char recovery device 15, and can discharge combustible gas containing char. In this case, by providing a gas cooler in the gas generation line 49, the combustible gas may be cooled to a predetermined temperature and then supplied to the char recovery device 15.

  The char recovery device 15 includes a dust collector 51 and a supply hopper 52. In this case, the dust collector 51 is constituted by one or a plurality of bag filters or cyclones, and can separate char contained in the combustible gas generated in the coal gasification furnace 14. The combustible gas from which the char has been separated is sent to the gas purification device 16 through the gas discharge line 53. The supply hopper 52 stores the char separated from the combustible gas by the dust collector 51. A char return line 46 from the supply hopper 52 is connected to the second nitrogen supply line 45.

The gas purification device 16 performs gas purification by removing impurities such as sulfur compounds and nitrogen compounds from the combustible gas from which the char has been separated by the char recovery device 15. The gas purifier 16 purifies the combustible gas to produce fuel gas and supplies it to the gas turbine equipment 17. In the gas purifier 16, since the combustible gas from which the char is separated still contains sulfur (H ₂ S), the sulfur is finally removed by removing it with the amine absorbent. Is recovered as gypsum and used effectively.

  The gas turbine equipment 17 includes a compressor 61, a combustor 62, and a turbine 63, and the compressor 61 and the turbine 63 are connected by a rotating shaft 64. The combustor 62 has a compressed air supply line 65 connected to the compressor 61, a fuel gas supply line 66 connected to the gas purifier 16, and a combustion gas supply line 67 connected to the turbine 63. Further, the gas turbine equipment 17 is provided with a compressed air supply line 41 extending from the compressor 61 to the coal gasification furnace 14, and a booster 68 is provided in the middle. Therefore, in the combustor 62, the compressed air supplied from the compressor 61 and the fuel gas supplied from the gas purifier 16 are mixed and burned, and the rotating shaft 64 is rotated by the generated combustion gas in the turbine 63. By doing so, the generator 19 can be driven.

  The steam turbine facility 18 includes a turbine 69 that is coupled to the rotating shaft 64 in the gas turbine facility 17, and the generator 19 is coupled to the base end portion of the rotating shaft 64. The exhaust heat recovery boiler 20 is provided in the exhaust gas line 70 from the gas turbine equipment 17 (the turbine 63), and generates steam by exchanging heat between the air and the high temperature exhaust gas. Therefore, the exhaust heat recovery boiler 20 is provided with the steam supply line 71 between the steam turbine equipment 18 and the turbine 69 of the steam turbine equipment 18, the steam recovery line 72 is provided, and the steam recovery line 72 is provided with the condenser 73. Yes. A gas purification device 74 and a chimney 75 are connected to the exhaust heat recovery boiler 20.

  In the coal gasification combined power generation facility 10 of Example 1 configured as above, raw coal is dropped into a crusher 23 by a coal feeder 22 and crushed by a coal feeder 11 and heated by a fluidized bed dryer 12. After being dried, it is cooled by a cooler 31 and stored in a dry charcoal bunker 32. The dry coal of the dry coal bunker 32 is pulverized by the pulverized coal machine 13 to produce pulverized coal, and is stored in the pulverized coal supply hoppers 38a and 38b. The pulverized coal stored in the pulverized coal supply hoppers 38a and 38b is supplied to the coal gasification furnace 14, and combusted with compressed air to be gasified, thereby combustible gas (coal gas containing carbon dioxide as a main component). ) Is generated. The combustible gas is separated into char by the char recovery device 15 and sent to the gas purification device 16.

  In the gas purification device 16, the combustible gas is purified by removing impurities such as sulfur compounds and nitrogen compounds to produce fuel gas. In the gas turbine facility 17, when the compressor 61 generates compressed air and supplies the compressed air to the combustor 62, the combustor 62 generates combustion gas by mixing the compressed air and the fuel gas and combusting, The turbine 63 is driven to generate power by the generator 19. The exhaust gas discharged from the gas turbine equipment 17 generates steam in the exhaust heat recovery boiler 20 and supplies the steam to the steam turbine equipment 18. In the steam turbine facility 18, the turbine 69 is driven by this steam and the generator 19 generates power. Thereafter, in the gas purification device 74, harmful substances in the exhaust gas discharged from the exhaust heat recovery boiler 20 are removed, and the purified exhaust gas is discharged from the chimney 75 to the atmosphere.

  Here, the fluidized bed drying apparatus 12 of Example 1 will be described in detail.

  The fluidized bed drying device 12 is a plug flow type drying device, and as shown in FIG. 1, a drying container 101, a raw coal supply device 102, a dry coal discharge port (dry matter discharge unit) 103, a flow The vaporized steam supply unit 104 (104a, 104b, 104c), the gas discharge port 105, and the heat transfer tubes 106, 107, 108 are provided.

  In the first embodiment, the raw material supply apparatus of the present invention will be described as applied to a raw coal supply apparatus (wet fuel supply apparatus) 102.

  The drying container 101 has a hollow box shape, and is provided with a raw coal supply device 102 that supplies raw coal to an upper portion on one end side, and discharges dry coal obtained by heating and drying raw coal to a lower portion on the other end side. A dry charcoal discharge port 103 is formed.

  Further, the drying container 101 is provided with a dispersion plate 109 having a plurality of through holes at a predetermined distance from the bottom plate 101a in the lower portion, so that the upper drying chamber (111, 112, 113) and the lower air chamber 110 are provided. It is divided into. The drying container 101 is provided with a fluidized vapor supply unit 104 (104a, 104b, 104c) that supplies fluidized gas to the bottom plate 101a via the wind chamber 110 and above the dispersion plate 109. Further, in the drying container 101, a gas discharge port 105 for discharging fluidized gas and generated steam is formed in the ceiling plate 101b on the dry coal discharge port 103 side.

  The drying vessel 101 is supplied with raw coal from the raw coal supply device 102 and fluidized gas is supplied from the fluidized steam supply unit 104 through the wind chamber 110 and the dispersion plate 109, so that the dispersion plate 109 A fluidized bed S having a predetermined thickness is formed above, and a free board portion F is formed in a space above the fluidized bed S.

  The drying container 101 includes a first drying chamber (divided drying chamber) 111 provided on the upstream side in the flow direction toward the dry coal discharge port 103 from which the raw coal discharges dry coal, and the first drying chamber. A second drying chamber (divided drying chamber) 112 provided on the downstream side of 111 and a third drying chamber (divided drying chamber) 113 provided on the most downstream side in the flow direction of the raw coal are provided.

  More specifically, the drying container 101 includes a plurality (two in this embodiment) of fluidized beds S in the flow direction of the raw coal (three in this embodiment) by a plurality of (two in this embodiment) partition plates (partition members) 114 and 115. ). In the drying container 101, raw coal passage openings 116 and 117 are formed in the lower portion by the partition plates 114 and 115. The partition plates 114 and 115 are arranged along a vertical direction orthogonal to the flow direction of the raw coal, and are arranged at predetermined intervals in the flow direction of the raw coal. It is attached to the inner wall surface. Each of the partition plates 114 and 115 is positioned such that the lower end portion is positioned with a predetermined gap from the dispersion plate 109 and the upper end portion extends above the fluidized bed S. That is, passage openings 116 and 117 having a predetermined height and width (opening area) are secured between the partition plates 114 and 115 and the dispersion plate 109, and the passage openings 116 and 117 are substantially The same opening area is set.

  As described above, the drying container 101 is divided into the first drying chamber 111, the second drying chamber 112, and the third drying chamber 113 by providing the partition plates 114 and 115. The drying chambers 111, 112, and 113 are In addition, communication is made above the partition plates 114 and 115. In this case, the first drying chamber 111 is a region (preheat drying region) in which the freeboard portion F1 and the fluidized bed S1 are formed and the initial drying of the raw coal is performed. In the second drying chamber 112, a free board portion F2 and a fluidized bed S2 are formed, and the second drying chamber 112 is an area (fixed rate drying area) where the raw coal is dried in the middle period. In the third drying chamber 113, a free board portion F3 and a fluidized bed S3 are formed, and the third drying chamber 113 is a region where the latter drying of raw coal is performed (decrease rate drying region).

  In this case, each of the drying chambers 111, 112, and 113 is set so that the floor area is substantially the same, but may be set to an optimum ratio according to the moisture content of raw coal, for example, 2 It is desirable to set the floor area of the drying chamber 112 to the maximum. That is, the first drying chamber 111 is a preheat drying region in which the drying rate of the raw coal is increased to a predetermined moisture content because the moisture content of the raw coal to be charged is high. Since the drying rate of the raw coal rises to a predetermined drying rate and becomes constant, the second drying chamber 112 is a constant rate drying region where the drying rate of the raw coal becomes constant. The drying rate of the raw coal is lowered when the moisture content of the raw coal reaches a predetermined moisture content (limit moisture content). Therefore, the third drying chamber 113 is a reduction rate drying region in which the drying rate of the raw coal decreases. is there. Therefore, the drying efficiency is improved by maximizing the volume of the second drying chamber 112 that is the constant rate drying region.

  Further, the drying container 101 includes a plurality of (two in this embodiment) partition plates 118 and 119 in the flow direction of the raw coal so as to correspond to the three drying chambers 111, 112, and 113. (In this embodiment, it is divided into three). That is, the wind chamber 110 is divided into three wind chambers 110a, 110b, and 110c by two partition plates 118 and 119, and the three flow chambers correspond to the three wind chambers 110a, 110b, and 110c. Steamed vapor supply sections 104a, 104b, and 104c are provided.

  The partition plates 118 and 119 are arranged along a vertical direction orthogonal to the flow direction of the raw coal, and are arranged at predetermined intervals in the flow direction of the raw coal. It is attached to the wall. Thus, the drying container 101 is partitioned into the first air chamber 110a, the second air chamber 110b, and the third air chamber 110c by providing the partition plates 118 and 119. The partition plates 118 and 119 are arranged below the partition plates 114 and 115.

  The fluidized bed drying apparatus 12 is provided with a steam supply line 121 that supplies fluidized steam to the drying chambers 111, 112, and 113, and three branch lines 121 a and 121 b branched from the steam supply line 121. , 121c are connected to the wind chambers 110a, 110b, 110c (fluidized steam supply units 104a, 104b, 104c), respectively. The branch lines 121a, 121b, and 121c are each provided with a flow rate adjustment valve (not shown), and the amount of fluidized steam supplied to each of the wind chambers 110a, 110b, and 110c can be adjusted. In this embodiment, the upstream drying chamber in the flow direction of the raw coal is set to have a higher superficial velocity.

  The fluidized gas supply apparatus of the present invention includes a fluidized steam supply unit 104 (104a, 104b, 103c), a dispersion plate 109, partition plates 118, 119, a steam supply line 121, branch lines 121a, 121b, 121c, a flow rate. It consists of a regulating valve.

  The drying container 101 is configured as a plug flow system so that the supplied raw coal is extruded in the room. This extruding flow is a flow that extrudes in the fluidized bed S in the flow direction toward the dry coal discharge port 103 where the raw coal discharges dry coal so that the raw coal does not diffuse in the flow direction.

  Further, the drying container 101 is provided with a plurality of heat transfer tubes 106, 107, and 108 that pass through the drying container 101 from the outside and circulate in the fluidized beds S1, S2, and S3 in the drying chambers 111, 112, and 113, respectively. Has been. The heat transfer tubes 106, 107, 108 are positioned so as to be embedded in the fluidized beds S1, S2, S3, and heat the raw coals of the fluidized beds S1, S2, S3 by the fluidized gas flowing inside. Can be dried. In this case, the temperature of the heat transfer tubes 106, 107, 108 can be adjusted by changing the pressure of the supplied superheated steam.

  Accordingly, the raw coal supplied to the first drying chamber 111 is fluidized by the fluidized gas and dried by being heated by the heat transfer tube 106. The raw coal initially dried in the first drying chamber 111 is moved to the second drying chamber 112 through the passage opening 116 below the partition plate 114, and is heated by the heat transfer tube 107 here. Medium-term dry. The raw coal dried in the second drying chamber 112 is moved to the third drying chamber 113 through the passage opening 117 at the bottom of the partition plate 115, where it is heated by the heat transfer tube 108. Late drying.

  Thereby, the raw coal forming the fluidized beds S1, S2, and S3 of the drying chambers 111, 112, and 113 sequentially moves between the fluidized beds S1, S2, and S3 from the upstream side through the passage openings 116 and 117. By doing so, it can be made an extruded flow, and it is dried without being diffused in the flow direction.

  Next, the raw coal supply apparatus 102 in the fluidized bed drying apparatus 12 will be described in detail.

  As shown in FIGS. 1 to 4, the raw coal supply device 102 is provided in the upper part of the first drying chamber 111 in the drying container 101, and includes a disperser 131, a raw coal supply unit 132, and a rotation drive device 133. And have.

  The drying container 101 is positioned at the upper part of the first drying chamber 111 and has a casing 141 fixed thereto. A supply pipe 142 having a cylindrical shape is provided from the casing 141 into the first drying chamber 111. The supply pipe 142 has a raw coal supply path (raw material supply path) 143 formed in the vertical direction. The rotating shaft 144 is suspended along the vertical direction on the upper portion of the drying container 101, and the upper portion is rotatably supported by the bearing portion 145 of the casing 141. The rotating shaft 144 is disposed along the center of the raw coal supply passage 143, and the rotational drive device 133 disposed in the casing 141 is connected to the upper end portion, and the disperser 131 is connected to the lower end portion. . Accordingly, the disperser 131 can be rotated by the rotation driving device 133 via the rotation shaft 144.

  The disperser 131 is rotatably supported by a rotating shaft 144 and is disposed in the first drying chamber 111 above the first fluidized bed S1. The disperser 131 has a conical shape in which the cross-sectional area in the horizontal direction is increased downward, and the surface length (bus line) in the radial direction is continuously different in the circumferential direction. That is, in the disperser 131, the surface length in the radial direction is increased along the circumferential direction.

  More specifically, the disperser 131 is hollow and has a conical shape with an open bottom, and the lower end 131a has a spiral shape. In this case, the disperser 131 gradually increases the radial surface length in a horizontal virtual circle G drawn around the rotation axis O at the position of the lower end 131a. The surface length in the radial direction is the longest. In the disperser 131, the surface length in the radial direction from position A to position B, position C, position D gradually decreases, and overlaps with the rotation axis O at position A moved 360 degrees, and is the shortest. Become.

  FIG. 5 shows a development view of the disperser 131. As shown in FIG. 5, the disperser 131 has a shape obtained by cutting a circular arc portion of a virtual sector S having a fan shape having a predetermined angle θ into a curved shape. As shown in FIG. 4, the disperser 131 is provided with a guide member 146 along the radial direction on the surface at a position A where the surface length in the radial direction is the longest.

  The casing 141 is provided with a raw coal storage device 147 for storing raw coal that has been dropped into the crusher 23 and crushed into powder, and a raw coal transfer device (conveyor conveyor) is provided below the raw coal storage device 147. 148 is arranged. The raw coal conveying device 148 conveys the powdery raw coal dropped from the raw coal storage device 147 in the horizontal direction and supplies it to the raw coal supply path 143 of the supply pipe 142. The raw coal is in a wet state containing water, and is described as a powder form including those that have become a certain amount of mass due to the wetness.

  The raw coal supply unit 132 described above is capable of supplying raw coal from the upper part of the drying container 101 toward the disperser 131, and includes a raw coal storage device 147, a raw coal transport device 148, a supply pipe 142 (raw material). It is constituted by a charcoal supply path 143).

  The raw coal supply method using the raw coal supply apparatus 102 configured as described above has a conical shape with a horizontal cross-sectional area increased downward and a radial surface length continuously in the circumferential direction. It has the process of rotating the disperser 131 which is different by the rotating shaft 144 along a perpendicular direction, and the process of supplying raw coal from the upper part of the drying container 101 toward the surface of the disperser 131.

  Here, the whole operation | movement of the fluidized bed drying apparatus 12 of Example 1 is demonstrated.

  In the fluidized bed drying device 12, as shown in FIGS. 1 and 2, the raw coal is supplied from the raw coal supply device 102 to the drying container 101 and flows from the fluidized steam supply unit 104 through the dispersion plate 109. When the vaporized steam is supplied, fluidized beds S1, S2, and S3 having a predetermined thickness are formed above the dispersion plate 109. The raw coal moves through the fluidized beds S1, S2, and S3 to the dry coal discharge port 103 side by the fluidized steam, and at this time, the raw coal is heated and dried by receiving heat from the heat transfer tubes 106, 107, and 108.

  That is, in the raw coal supply device 102, the disperser 131 is rotated in the R direction by the rotation drive device 133 via the rotation shaft 144, while the raw coal stored in the raw coal storage device 147 is transferred to the raw coal transport device 148. It is dropped and supplied to the raw coal supply path 143 of the supply pipe 142 by the raw coal transfer device 148. Then, the raw coal that freely falls in the raw coal supply path 143 falls almost uniformly in the circumferential direction toward the surface of the rotating disperser 131, descends the surface of the rotating disperser 131 in the radial direction, and the lower end It falls from the part 131a to the surface part of the fluidized bed S1.

  At this time, since the surface of the disperser 131 is inclined downward, the raw coal powder in the wet state descends radially on the surface, but the disperser 131 is rotating. Therefore, centrifugal force is given to raw coal, it moves to the outward of the radial direction of the disperser 131, and if it reaches the lower end 131a, it will fall in the radial direction. Since the disperser 131 has a radial surface length, that is, the position of the lower end 131a is different in the circumferential direction, the raw coal falls at different positions in the radial direction of the disperser 131.

  That is, the raw coal is dispersed and dropped in the circumferential direction on the surface of the disperser 131 that rotates through the raw coal supply path 143. In addition, it is more preferable to appropriately select the inclination state and the rotation speed of the disperser 131 so that the drops fall almost uniformly. Then, the raw coal moving in the radial direction on the surface of the disperser 131 sequentially falls at each position passing through the position D, the position C, the position B, and the position A of the lower end 131a. That is, the raw coal on the disperser 131 is dispersed in the circumferential direction from the raw coal supply path 143, and more preferably is supplied almost uniformly. And since this disperser 131 rotates, it is supplied to the fluidized bed S1 substantially uniformly in the circumferential direction. Moreover, since the length of the radial direction of the disperser 131 differs in the circumferential direction, the raw coal on the disperser 131 is dispersed in the radial direction with respect to the fluidized bed S1, and more preferably is supplied substantially uniformly. Further, the raw coal on the disperser 131 is dispersed and supplied by being blown outward in the radial direction by the centrifugal force on the disperser 131. As a result, the disperser 131 can supply the raw coal uniformly over a wide area of the fluidized bed S1.

  When the raw coal is supplied to the fluidized bed S1 in a dispersed manner from the raw coal supply device 102, and more preferably supplied uniformly, first, in the first drying chamber 111, the first wind is supplied from the fluidized steam supply unit 104a. Fluidized steam is supplied to the chamber 110 a, and this fluidized steam is supplied to the first drying chamber 111 through each through hole of the dispersion plate 109. Therefore, wet raw coal is dried while flowing in the fluidized bed S <b> 1 by receiving the fluidized steam and heat from the heat transfer pipe 106.

  Next, the raw coal that has been initially dried in the first drying chamber 111 flows into the second drying chamber 112 through the passage opening 116 below the partition plate 114. In the second drying chamber 112, fluidized steam is supplied from the fluidized steam supply unit 104 b to the second wind chamber 110 b, and this fluidized steam is supplied to the second drying chamber 112 through each through hole of the dispersion plate 109. . Therefore, the raw coal is dried while flowing in the fluidized bed S2 by receiving the fluidized steam and the heat from the heat transfer tube 107. The raw coal that has been subjected to medium-term drying in the second drying chamber 112 flows into the third drying chamber 113 through the passage opening 117 below the partition plate 115.

  In the third drying chamber 113, fluidized steam is supplied from the fluidized steam supply unit 104 c to the third wind chamber 110 c, and this fluidized steam is supplied to the third drying chamber 113 through each through hole of the dispersion plate 109. . Therefore, the raw coal is dried while flowing in the fluidized bed S3 by receiving the fluidized steam and the heat from the heat transfer tube 108. In this way, the raw coal flows in the fluidized beds S1, S2, S3 by the fluidized steam supplied while being heated by the heat transfer tubes 106, 107, 108, and diffuses in the flow direction as an extruded flow. Without drying.

  Then, the dry coal from which the raw coal has been dried is discharged to the outside through the dry coal discharge port 103, and the steam generated by heating and drying the raw coal in the fluidized bed S rises together with the fluidized steam. It flows from the free board part F formed in the space above S to the dry coal discharge port 103 side, and is discharged to the outside from the gas discharge port 105.

  Thus, in the raw coal supply apparatus 102 of Example 1, it is rotatably supported by the rotating shaft 144 suspended along the vertical direction on the upper part of the drying container 101 and has a horizontal cross-sectional area downward. A disperser 131 having an increased cone shape and a radial surface length continuously different in the circumferential direction, and a raw coal supply unit capable of supplying raw coal from the top of the drying vessel 101 toward the disperser 131 132 and a rotational drive device 133 capable of rotating the disperser 131 are provided.

  Accordingly, since the disperser 131 has a conical shape and the radial surface length is different in the circumferential direction, the disperser 131 is rotated by the rotation driving device 133, and the surface of the disperser 131 is supplied from the raw coal supply unit 132. When the raw coal is supplied toward, the raw coal descends in the radial direction on the surface of the rotating disperser 131 and falls from the lower end 131a to the fluidized bed S1. At this time, the raw coal falls while being moved radially outward by the centrifugal force of the rotating disperser 131 and falls at a plurality of positions having different radial surface lengths. Dispersed and supplied over a wide area of the fluidized bed S1, and more preferably by appropriately selecting the inclined state and rotation speed of the disperser 131, it is possible to supply more uniformly and to suppress the enlargement of the apparatus. Can do.

  In this case, when the disperser 131 has a conical shape, the raw coal supplied to the surface of the rotating disperser 131 is distributed and distributed in the circumferential direction, more preferably uniformly distributed. The surface of the disperser 131 can be properly lowered and dropped.

  In the raw coal supply device 102 of the first embodiment, the radial surface length of the disperser 131 is increased along the circumferential direction. Therefore, since raw coal falls at different positions of the lower end 131a in the radial direction while moving radially outward by the centrifugal force of the rotating disperser 131, the raw coal can be distributed and supplied, more preferably It can be supplied uniformly.

  In the raw coal supply apparatus 102 according to the first embodiment, the guide member 146 along the radial direction is provided at the position where the surface length in the radial direction of the disperser 131 is the longest. Accordingly, the raw coal supplied to the surface of the rotating disperser 131 descends in the radial direction and falls from the lower end 131a. At this time, the raw coal at the position where the surface length in the radial direction is the longest is the guide member. Since it descends while being guided by 146, it does not fall without being dispersed in the middle of the surface, and the raw coal can be more uniformly dispersed and supplied.

  In the raw coal supply apparatus 102 according to the first embodiment, the raw coal supply path 143 is provided as the raw coal supply unit 132 along the vertical direction, and the rotating shaft 144 of the disperser 131 is disposed along the center of the raw coal supply path 143. doing. Therefore, by disposing the rotating shaft 144 of the disperser 131 in the raw coal supply path 143, the apparatus can be made compact and the raw coal can be supplied to the disperser 131 appropriately.

  Further, in the raw coal supply method according to the first embodiment, the disperser 131 has a conical shape in which a horizontal cross-sectional area is increased downward, and the radial surface length is continuously different in the circumferential direction. And a step of supplying raw coal from the upper part of the drying vessel 101 toward the surface of the disperser 131.

  Therefore, the raw coal falls while being moved radially outward by the centrifugal force of the rotating disperser 131, and falls at a position where the radial surface length is different. While being able to supply, More preferably, it can supply uniformly and the enlargement of an apparatus can be suppressed.

  Further, in the fluidized bed drying apparatus 12 of the first embodiment, the drying container 101 and the partition members 114 and 115 in which the plurality of drying chambers 111, 112, and 113 are formed and the passage openings 116 and 117 are formed are provided. A fluidized steam supply unit 104 that forms fluidized beds S1, S2, and S3 together with raw coal by supplying fluidized gas from below each of the drying chambers 111, 112, and 113 is provided as a raw coal supply device 102. The disperser 131, the raw coal supply unit 132, and the rotation driving device 133 described above are provided.

  Therefore, when the raw coal supply device 102 supplies the raw coal to the drying container 101, the raw coal falls while being moved radially outward by the centrifugal force of the rotating disperser 131, and the radial surface. Since it falls in the position where length differs, raw coal to fluidized-bed S1 can be disperse | distributed and supplied, More preferably, while being able to supply uniformly, the enlargement of an apparatus can be suppressed.

  FIG. 7 is a schematic diagram illustrating a raw coal supply device in a fluidized bed drying apparatus according to Embodiment 2 of the present invention, and FIG. 8 is a front view of a distributor in the raw coal supply device. In addition, the same code | symbol is attached | subjected to the member which has the function similar to the Example mentioned above, and detailed description is abbreviate | omitted.

  In Example 2, as shown in FIG.7 and FIG.8, the raw coal supply apparatus 201 is provided in the upper part of the 1st drying chamber 111 in the drying container 101, the disperser 202, the raw coal supply part 132, , And a rotation drive device 133.

  The drying container 101 is positioned at the upper part of the first drying chamber 111 and has a casing 141 fixed thereto. A supply pipe 142 is provided from the casing 141 into the first drying chamber 111, and a raw coal supply path 143 is provided inside. Is formed. The rotating shaft 144 is disposed along the center portion of the raw coal supply path 143, is rotatably supported by the bearing portion 145 of the casing 141, the rotation driving device 133 is connected to the upper end portion, and the disperser is connected to the lower end portion. 202 are connected.

  The disperser 202 has a conical shape in which the cross-sectional area in the horizontal direction is increased downward, and the surface length (bus line) in the radial direction is different in the circumferential direction. That is, the disperser 202 has a radial surface length that increases along the circumferential direction.

  Further, the disperser 202 includes a hollow portion 211 inside the conical shape, a drying gas supply device 212 for supplying a drying gas to the hollow portion 211, and a drying gas from the hollow portion 211 to the surface side of the disperser 202. And a plurality of drying gas ejection portions 213 that can be ejected. That is, the rotating shaft 144 and the disperser 202 have a hollow shape, and the hollow portion 211 is formed by fixing the lid 214 to the lower portion. The rotating shaft 144 has a hollow shape so that the drying gas passes through the rotating shaft 144 and is supplied to the hollow portion 211 of the disperser 222, and a connecting portion 215 is provided in the middle portion for drying. The gas supply device 212 is connected to the connecting portion 215 via the pipe 216. The connecting part 215 allows the drying gas (for example, heated steam) supplied through the pipe 216 to pass through the rotating shaft 144.

  The disperser 202 is provided with a plurality of drying gas ejection portions 213 capable of ejecting the drying gas in the hollow portion 211 to the surface side. Each of the drying gas ejection portions 213 is arranged in a staggered manner along the radial direction of the disperser 202, and is disposed toward the radial direction of the disperser 202.

  In the raw coal supply apparatus 201 of Example 2 configured as described above, the disperser 202 is rotated in the R direction by the rotation drive device 133 via the rotation shaft 144, while the raw coal supply section 132 rotates the raw coal. It is supplied to the charcoal supply path 143. Then, the raw coal that freely falls in the raw coal supply path 143 falls almost uniformly in the circumferential direction toward the surface of the rotating disperser 202, and flows down the surface of the rotating disperser 202 in the radial direction. It falls on the surface part of the layer S1.

  At this time, since the surface of the disperser 202 is inclined, the raw coal descends radially on the surface, but since the disperser 202 is rotating, centrifugal force is applied to the raw coal, Move more radially outward. Since the disperser 202 has different radial surface lengths in the circumferential direction, the raw coal falls at different positions in the radial direction of the disperser 202.

  In addition, since the surface temperature of the disperser 202 is increased by heating steam supplied as a drying gas being supplied to the inside of the disperser 202, drying of the raw coal that descends the surface of the disperser 202 in the radial direction is prevented. Promoted. And since the dispersion | distribution device 202 has a heating vapor | steam ejected from the several gas ejection part 213 for drying, while suppressing that raw coal adheres to the surface of the dispersion | distribution device 202, a dispersion | distribution device is also used with this heating vapor | steam. Drying of the raw coal descending radially on the surface of 202 is promoted.

  Thus, in the raw coal supply apparatus 201 of Example 2, it is rotatably supported by the rotating shaft 144 suspended along the vertical direction on the upper part of the drying container 101 and has a horizontal cross-sectional area downward. A disperser 202 having an increased conical shape and a continuous radial surface length in the circumferential direction is provided, and a hollow portion 211 and a drying gas are supplied to the disperser 202. A drying gas supply device 212 and a plurality of drying gas ejection portions 213 capable of ejecting a drying gas from the hollow portion 211 to the surface side are provided.

  Therefore, when the disperser 202 is rotated and raw coal is supplied toward the surface of the disperser 202, the raw coal descends in the radial direction on the surface of the rotating disperser 202 and falls into the fluidized bed S1. . At this time, the raw coal falls while being moved radially outward by the centrifugal force of the rotating disperser 202, and falls to a plurality of positions having different radial surface lengths. The fluidized bed S1 can be supplied in a distributed manner, and more preferably by appropriately selecting the inclined state and rotation speed of the disperser 131 so that the fluidized bed S1 falls almost uniformly.

  Further, when the drying gas supply device 212 supplies the drying gas to the hollow portion 211, the drying gas is ejected from the plurality of drying gas ejection portions 213 to the surface of the disperser 202. Even if the raw coal supplied to the surface of the raw coal has a high moisture content, the raw coal is accelerated by the drying gas, and the adhesion of the raw coal to the surface of the disperser 202 is prevented, and the raw coal Supply can be performed appropriately. Even if the raw coal adheres to the surface of the disperser 202, the raw coal adheres to the surface of the disperser 202 by being attached by the drying gas ejected from the drying gas jetting unit 213 and blown off. To suppress. Furthermore, when the drying gas is heated steam, the disperser 202 itself can be heated to increase the surface temperature, and the raw coal moves on the surface of the disperser 202 by heating. Drying can be promoted.

  FIG. 9 is a schematic diagram illustrating a raw coal supply device in a fluidized bed drying apparatus according to Embodiment 3 of the present invention, and FIG. 10 is a plan view of a distributor in the raw coal supply device. In addition, the same code | symbol is attached | subjected to the member which has the function similar to the Example mentioned above, and detailed description is abbreviate | omitted.

  In Example 3, as shown in FIGS. 9 and 10, the raw coal supply device 221 is provided in the upper part of the first drying chamber 111 in the drying container 101, and includes a disperser 222, a raw coal supply unit 132, and the like. , And a rotation driving device 223.

  The drying container 101 is positioned at the upper part of the first drying chamber 111 and has a casing 141 fixed thereto. A supply pipe 142 is provided from the casing 141 into the first drying chamber 111, and a raw coal supply path 143 is provided inside. Is formed. The rotating shaft 144 is disposed along the central portion of the raw coal supply path 143, is rotatably supported by the bearing portion 145 of the casing 141, and the disperser 222 is connected to the lower end portion.

  The disperser 222 has a conical shape in which the cross-sectional area in the horizontal direction is increased downward, and the surface length (bus line) in the radial direction is continuously different in the circumferential direction. In other words, the disperser 222 has a radial surface length that increases along the circumferential direction.

  The disperser 222 includes a hollow portion 211, a drying gas supply device 212 that supplies a drying gas to the hollow portion 211, and a plurality of drying gas jets that can eject the drying gas from the hollow portion 211 to the surface side. Part 231. That is, the rotating shaft 144 and the disperser 222 have a hollow shape, and the hollow portion 211 is formed by fixing the lid 214 to the lower portion. The rotating shaft 144 has a hollow shape so that the drying gas passes through the rotating shaft 144 and is supplied to the hollow portion 211 of the disperser 222, and a connecting portion 215 is provided in the middle portion for drying. The gas supply device 212 is connected to the connecting portion 215 via the pipe 216. The connecting part 215 allows the drying gas (for example, heated steam) supplied through the pipe 216 to pass through the rotating shaft 144.

  The disperser 222 is provided with a plurality of drying gas ejection portions 231 capable of ejecting the drying gas of the hollow portion 211 to the surface side. The drying gas ejection portions 231 are arranged in a staggered manner along the radial direction of the disperser 222. Then, each of the drying gas ejection portions 231 is arranged in the circumferential direction of the disperser 222 to constitute a rotation drive device 223. Specifically, each of the drying gas ejection portions 231 is arranged at equal intervals in the circumferential direction of the disperser 222 and is fixed in a tangential direction with respect to the horizontal virtual circle G.

  When the drying gas supply device 212 supplies the drying gas to the connecting portion 215 via the pipe 216 in the raw coal supply device 221 of the third embodiment configured as described above, the drying gas is supplied to the rotating shaft. 144 is supplied to the hollow portion 211 of the disperser 222, and is ejected from the plurality of drying gas ejection portions 231 to the outside. Therefore, the disperser 222 is rotated in the R direction by the rotation driving device 223, while the raw coal is supplied to the raw coal supply path 143 by the raw coal supply device 221. Then, the raw coal that freely falls in the raw coal supply path 143 is dispersed in the circumferential direction toward the surface of the rotating disperser 222, and more preferably, the inclination state and the rotation speed of the disperser 222 are appropriately selected. Then, it falls almost uniformly, descends in the radial direction on the surface of the rotating disperser 222, and falls onto the surface of the fluidized bed S1.

  At this time, since the surface of the disperser 222 is inclined, the raw coal descends radially on the surface, but since the disperser 222 is rotating, centrifugal force is applied to the raw coal, Move more radially outward. And since the surface length of the radial direction of the disperser 222 differs in the circumferential direction, raw coal falls in the position where the radial direction of the disperser 222 differs.

  Further, since the disperser 222 is heated by being supplied with heating steam as a drying gas, drying of the raw coal descending in the radial direction on the surface of the disperser 222 is promoted. And since the dispersion | distribution device 222 sprays a heating vapor | steam from the several gas ejection part 231 for drying, drying of the raw coal which descend | falls the surface of the dispersion | distribution device 222 to a radial direction is accelerated | stimulated also by this heating vapor | steam. .

  As described above, in the raw coal supply apparatus 221 of the third embodiment, a horizontal cross-sectional area is downwardly supported by the rotating shaft 144 that is suspended along the vertical direction on the upper portion of the drying container 101. A disperser 222 having an increased conical shape and a continuous radial surface length in the circumferential direction is provided. The disperser 222 is provided with a hollow portion 211, a drying gas supply device 212, and a drying gas jet. A portion 231 is provided, and each drying gas ejection portion 231 is provided in the circumferential direction.

  Accordingly, when the disperser 222 is rotated and the raw coal is supplied toward the surface, the raw coal descends in the radial direction on the surface of the rotating disperser 222 and falls into the fluidized bed S1. At this time, the raw coal falls while being moved radially outward by the centrifugal force of the rotating disperser 222, and falls to a plurality of positions having different radial surface lengths. The fluidized bed S1 can be distributed and supplied over a wide area, more preferably uniformly.

  When the drying gas supply device 212 supplies the drying gas to the hollow portion 211, the drying gas is ejected from the plurality of drying gas ejection portions 231 onto the surface of the disperser 222. Even if the raw coal supplied to the surface of the raw coal has a high water content, the drying of the raw coal is accelerated by the drying gas, and the adhesion of the raw coal to the surface of the disperser 222 is prevented, and the raw coal Supply can be performed appropriately.

  The plurality of drying gas ejection portions 231 eject the drying gas toward the circumferential direction of the disperser 222. Therefore, the disperser 222 can rotate by obtaining a propulsion force from the ejected drying gas. Thus, the rotation drive device 223 can be configured by a plurality of drying gas ejection portions 231, and it is not necessary to reduce the drive power of the rotation drive device or to provide a separate rotation drive device, thereby simplifying the structure It can be.

  In Example 2 described above, the drying gas ejection part 213 is provided in the radial direction of the disperser 202, and in Example 3, the drying gas ejection part 231 is provided in the circumferential direction of the disperser 222. However, the present invention is not limited to this configuration. For example, some of the drying gas ejection portions may be directed in the radial direction of the disperser and the remaining drying gas ejection portions may be directed in the circumferential direction of the disperser. Moreover, you may make it make drying gas contact easily with the raw coal which moves the surface of a disperser by orientating the direction of several drying gas ejection parts to a different direction.

  FIG. 11 is a schematic diagram illustrating a raw coal supply device in a fluidized bed drying apparatus according to Embodiment 4 of the present invention, FIG. 12 is a front view of a disperser in the raw coal supply device, and FIG. It is a top view of a disperser. In addition, the same code | symbol is attached | subjected to the member which has the function similar to the Example mentioned above, and detailed description is abbreviate | omitted.

  In Example 4, as shown in FIGS. 11 to 13, the raw coal supply device 241 is provided in the upper part of the first drying chamber 111 in the drying container 101, and includes a disperser 242, a raw coal supply unit 132, and the like. , And a rotation drive device 133.

  The drying container 101 is positioned at the upper part of the first drying chamber 111 and has a casing 141 fixed thereto. A supply pipe 142 is provided from the casing 141 into the first drying chamber 111, and a raw coal supply path 143 is provided inside. Is formed. The rotating shaft 144 is disposed along the center portion of the raw coal supply path 143, is rotatably supported by the bearing portion 145 of the casing 141, the rotation driving device 133 is connected to the upper end portion, and the disperser is connected to the lower end portion. 242 are connected.

  The disperser 242 has a conical shape in which the cross-sectional area in the horizontal direction is increased downward, and the surface length (bus line) in the radial direction is continuously different in the circumferential direction. That is, the disperser 242 has a radial surface length that is longer along the circumferential direction.

  Further, the disperser 242 is provided with a plurality of guide members 251, 252, 253, and 254 along the radial direction on the surface, and each guide member 251, 252, 253, and 254 has a predetermined interval (etc.) in the circumferential direction. Interval). That is, the disperser 242 has the longest radial surface length at the position A in the horizontal virtual circle G drawn around the rotation axis O at the position of the lower end 242a. Positions B, C, and D every 90 degrees gradually shorten the surface length in the radial direction, and overlap with the rotation axis O at the position A moved 360 degrees, which is the shortest. The guide members 251, 252, 253, and 254 are provided at the positions A, B, C, and D along the radial direction of the disperser 242. In the present embodiment, the example in which the four guide members 251, 252, 253, and 254 are provided on the surface of the disperser 242 has been described. However, the present invention is not limited to this, and the size of the disperser may be increased. Accordingly, the number of guide members installed can be changed as appropriate.

  In the raw coal supply device 241 of Example 4 configured in this way, the disperser 242 rotates in the R direction via the rotation shaft 144 by the rotation drive device 133, while the raw coal supply unit 132 rotates the raw coal. It is supplied to the charcoal supply path 143. Then, the raw coal that freely falls in the raw coal supply passage 143 is dispersed and dropped in the circumferential direction toward the surface of the rotating disperser 242, and more preferably, the inclination state and the rotation speed of the disperser 131 are appropriately set. By selecting, it falls almost uniformly, descends the surface of the rotating disperser 242 in the radial direction, and falls onto the surface portion of the fluidized bed S1.

  At this time, since the surface of the disperser 242 is inclined, the raw coal descends in a radial direction on the surface, but since the disperser 242 rotates, centrifugal force is applied to the raw coal, Move more radially outward. And since the surface length of the dispersion | distribution device 242 differs continuously in the circumferential direction, raw coal falls in the position where the dispersion | distribution direction of the dispersion | distribution device 242 differs.

  In addition, since the disperser 242 is provided with a plurality of guide members 251, 252, 253, and 254 projecting along the radial direction on the surface, the raw coal that descends the surface of the disperser 242 The region partitioned by 252, 253, and 254 is lowered, and the movement of the raw coal in the circumferential direction is suppressed to prevent the raw coal from falling locally without being dispersed.

  As described above, in the raw coal supply device 241 of the fourth embodiment, the horizontal cross-sectional area is downwardly supported by the rotating shaft 144 that is suspended along the vertical direction on the upper portion of the drying container 101. A disperser 242 that has an increased conical shape and whose surface length in the radial direction is continuously different in the circumferential direction is provided, and a plurality of guide members 251, 252, and 253 are provided on the surface of the disperser 242 along the radial direction. , 254 are provided at predetermined intervals in the circumferential direction.

  Therefore, when the disperser 242 is rotated and raw coal is supplied toward the surface, the raw coal descends in the radial direction on the surface of the rotating disperser 242 and falls into the fluidized bed S1. At this time, the raw coal falls while being moved radially outward by the centrifugal force of the rotating disperser 242 and falls to a plurality of positions having different radial surface lengths. The fluidized bed S1 can be distributed and supplied over a wide area, more preferably uniformly.

  Further, when the raw coal descends along the surface of the disperser 242, it is guided and lowered by the guide members 251, 252, 253, 254, so that the movement of the raw coal in the circumferential direction is suppressed, and the raw coal is reduced. Does not fall locally with respect to the fluidized bed S1, and the raw coal can be distributed and supplied to the fluidized bed S1, more preferably uniformly.

  FIG. 14 is a schematic diagram showing a fluidized bed drying apparatus according to Example 5 of the present invention. In addition, the same code | symbol is attached | subjected to the member which has the function similar to the Example mentioned above, and detailed description is abbreviate | omitted.

  In Example 5, as shown in FIG. 14, the fluidized bed drying device 12 includes a drying container 101, a raw coal supply device 102, a dry coal discharge port 103, a fluidized steam supply unit 104, and a gas discharge port 105. And heat transfer tubes 106, 107, 108. And the raw coal supply apparatus 102 is provided in the upper part of the 1st drying chamber 111 in the drying container 101, and has the disperser 131, the raw coal supply part 132, and the rotational drive apparatus 133. FIG. In addition, since the structure of this fluidized bed drying apparatus 12 and the raw coal supply apparatus 102 is the same as that of Example 1 mentioned above, detailed description is abbreviate | omitted.

  In the present embodiment, a plurality of temperature sensors 261 are provided as fluidized bed state detection sensors that detect the state of a plurality of regions in which the fluidized bed S1 is partitioned for each predetermined size. The control device 262 can input the detection result of each temperature sensor 261, and the rotation speed of the disperser 131 can be controlled by the rotation driving device 133 based on the detection result.

  That is, the fluidized bed S1 of the drying container 101 is divided into a plurality of regions, for example, an upper portion, a middle portion, and a lower portion in the vertical direction, and a central portion, an outer peripheral portion, and an intermediate portion in the horizontal direction. A temperature sensor 261 for detecting the temperature of the fluidized bed S1 is provided in the part. In this case, each temperature sensor 261 is supported by a support rod (not shown) from the bottom plate 101a, the ceiling plate 101b, the side wall, and the like of the drying container 101.

  The control device 262 receives the detection results of the plurality of temperature sensors 261 and can adjust the rotation speed of the disperser 131 by the rotation drive device 133. Specifically, the control device 262 determines a predetermined temperature (for example, 5 ° C. or 10 ° C.) in which the temperature deviation between adjacent regions is preset based on the temperature of each region in the fluidized bed S1 detected by the plurality of temperature sensors 261. ) If this is the case, the amount of the raw coal falling while being moved radially outward by the centrifugal force of the rotating disperser 131 is adjusted by adjusting the rotational speed of the disperser 131 by the rotation drive device 133. Since the amount of falling at the position where the surface length in the radial direction is different can be adjusted, the dispersion state of the raw coal to the fluidized bed S1 is adjusted and supplied, and the raw coal to the corresponding region is supplied. Adjust the supply amount.

  If the temperature of the central part in the horizontal direction of the fluidized bed S1 decreases, it is determined that the dryness of the raw coal in this region is delayed, and the supply amount of raw coal to this region is reduced. That is, the control device 262 increases the rotation speed of the disperser 131 by the rotation driving device 133. When the rotational speed of the disperser 131 increases, the centrifugal force applied to the raw coal dispersed by the disperser 131 increases, and a large amount of raw coal is supplied to the outer peripheral portion in the horizontal direction of the fluidized bed S1.

  On the other hand, if the temperature of the outer peripheral part in the horizontal direction of the fluidized bed S1 decreases, it is determined that the dryness of the raw coal in this region is delayed, and the supply amount of raw coal to this region is reduced. That is, the control device 262 decreases the rotation speed of the disperser 131 by the rotation drive device 133. When the rotational speed of the disperser 131 decreases, the centrifugal force applied to the raw coal dispersed by the disperser 131 decreases, and a large amount of raw coal is supplied to the central portion in the horizontal direction of the fluidized bed S1.

  Thus, in the raw coal supply apparatus 102 of Example 5, it is rotatably supported by the rotating shaft 144 suspended along the vertical direction on the upper part of the drying container 101 and has a horizontal cross-sectional area downward. A disperser 131 having an increased conical shape and having radial surface lengths continuously different in the circumferential direction, a rotational drive device 133 that rotationally drives the disperser 131, and a fluidized bed S1 have a predetermined size. A plurality of temperature sensors 261 for detecting the temperature of a plurality of regions partitioned for each time, and a control device 262 for controlling the rotational speed of the disperser 131 by the rotation driving device 133 based on the detection result of each temperature sensor 261. Yes.

  Therefore, the control device 262 adjusts the rotational speed of the disperser 131 based on the temperature of each region in the fluidized bed S1 detected by each temperature sensor 261. In this case, by adjusting the rotation speed of the disperser 131 so that the temperature of each region in the fluidized bed S1 is uniform, the supply position and supply amount of the raw coal are adjusted, and the raw coal is efficiently dried. It can be carried out.

  FIG. 15 is a schematic diagram illustrating a fluidized bed drying apparatus according to Embodiment 6 of the present invention. In addition, the same code | symbol is attached | subjected to the member which has the function similar to the Example mentioned above, and detailed description is abbreviate | omitted.

  In Example 6, as shown in FIG. 15, the fluidized bed drying device 12 includes a drying container 101, a raw coal supply device 102, a dry coal discharge port 103, a fluidized steam supply unit 104, and a gas discharge port 105. And heat transfer tubes 106, 107, 108.

  The raw coal supply device 102 is provided in the upper part of the first drying chamber 111 in the drying container 101, and includes a disperser 131, a raw coal supply unit 132, and a rotation drive device 133. In the raw coal supply device 102, the disperser 131 is supported so as to be movable along the vertical direction via the rotation shaft 144, and can be moved in the vertical direction by the vertical movement device 271.

  In addition, since the other structure in this fluidized bed drying apparatus 12 and raw coal supply apparatus 102 is the same as that of Example 1 mentioned above, detailed description is abbreviate | omitted.

  In the present embodiment, a plurality of temperature sensors 261 are provided for detecting the states of a plurality of regions in which the fluidized bed S1 is partitioned for each predetermined size. The control device 262 can input the detection results of the temperature sensors 261. Based on the detection results, the vertical moving device 271 can move the disperser 131 in the vertical direction and control the position thereof. Yes.

  That is, the control device 262 can receive the detection results of the plurality of temperature sensors 261 and can adjust the position of the disperser 131 in the vertical direction by the vertical movement device 271. Specifically, the control device 262 determines a predetermined temperature (for example, 5 ° C. or 10 ° C.) in which the temperature deviation between adjacent regions is preset based on the temperature of each region in the fluidized bed S1 detected by the plurality of temperature sensors 261. ) When the above is reached, the position of the disperser 131 is adjusted by the vertical moving device 271 so that the raw coal falling at a speed in the horizontal direction while being moved radially outward by the centrifugal force of the disperser 131 is dropped. By adjusting the position, the dispersion state of the raw coal to the fluidized bed S1 is adjusted and supplied, and the supply amount of the raw coal to the corresponding region is adjusted.

  If the temperature of the central part in the horizontal direction of the fluidized bed S1 decreases, it is determined that the dryness of the raw coal in this region is delayed, and the supply amount of raw coal to this region is reduced. That is, the control device 262 raises the disperser 131 by the vertical movement device 271. When the disperser 131 rises, the raw coal dispersed by the disperser 131 is dropped with a speed in the horizontal direction while being moved radially outward by the centrifugal force of the disperser 131. It spreads in the radial direction and is supplied to the outer peripheral portion in the horizontal direction of the fluidized bed S1.

  On the other hand, if the temperature of the outer peripheral part in the horizontal direction of the fluidized bed S1 decreases, it is determined that the dryness of the raw coal in this region is delayed, and the supply amount of raw coal to this region is reduced. That is, the control device 262 lowers the disperser 131 by the vertical movement device 271. When the disperser 131 descends, the position where the raw coal falls decreases in the radial direction, and a large amount of raw coal dispersed by the disperser 131 is supplied to the central portion in the horizontal direction of the fluidized bed S1.

  Thus, in the raw coal supply apparatus 102 of Example 6, it is rotatably supported by the rotating shaft 144 suspended along the vertical direction at the upper part of the drying container 101 and has a horizontal cross-sectional area downward. A disperser 131 having an increased conical shape and a radial surface length that differs in the circumferential direction, a rotary drive device 133 that rotationally drives the disperser 131, and a vertical movement that moves the disperser 131 in the vertical direction An apparatus 271, a plurality of temperature sensors 261 for detecting temperatures of a plurality of regions in which the fluidized bed S 1 is partitioned at a predetermined size, and a disperser 131 by a vertical movement device 271 based on the detection results of each temperature sensor 261. A control device 262 is provided for controlling the position.

  Therefore, the control device 262 adjusts the height position of the disperser 131 based on the temperature of each region in the fluidized bed S1 detected by each temperature sensor 261. In this case, by adjusting the height position of the disperser 131 so that the temperature of each region in the fluidized bed S1 is uniform, the supply position and supply amount of the raw coal are adjusted, and the raw coal is efficiently dried. It can be performed.

  In the sixth embodiment, the vertical moving device 271 that moves the disperser 131 in the vertical direction is provided and the position of the disperser 131 is adjusted according to the state of the fluidized bed S1, but the present invention is limited to this configuration. Is not to be done. For example, the amount of raw coal may be distributed and supplied to the fluidized bed S1 over a wide range by adjusting the amount of movement and the movement speed pattern of the disperser 131 that is always reciprocated vertically in the vertical direction by the vertical movement device 271. . Further, by moving the disperser 131 in the vertical direction according to the moisture content of the raw coal and controlling the height position, the raw coal can be distributed and supplied over a wide range to the fluidized bed S1.

  In the fifth and sixth embodiments described above, a plurality of temperature sensors 261 are applied as a fluidized bed state detection sensor that detects the state of a plurality of regions in which the fluidized bed S1 is partitioned for each predetermined size. A sensor may be applied. In this case, since the region where the pressure in the fluidized bed S1 is high is a region where the amount of raw coal is large and drying is delayed, it is necessary to reduce the supply amount of raw coal. The rotational speed of the disperser 131 and the height position of the disperser 131 may be adjusted based on the pressure in each region detected by each pressure sensor.

  Moreover, in the Example mentioned above, although one raw coal supply apparatus 102, 201, 221, 241 was provided in the drying container 101, you may provide two or more according to the magnitude | size of the drying container 101 and the supply amount of raw coal. It is.

  In the above-described embodiments, the dispersers 131, 202, 222, and 242 have a conical shape. However, the dispersers 131, 202, 222, and 242 may have a pyramid shape, and the inclined surface in the radial direction is not limited to a straight line, and may be a curved surface having an uneven shape. .

  In the above-described embodiment, the inside of the drying container 101 is divided into three drying chambers 111, 112, and 113. However, two drying chambers or four or more drying chambers may be used. Further, the configuration and arrangement of the shape of the drying container 101, the raw coal supply device 102, the dry coal discharge port 103, the fluidized steam supply unit 104, the gas discharge port 105, and the heat transfer tubes 106, 107, 108 are described in each embodiment. It is not limited and can be changed as appropriate according to the installation location and application of the fluidized bed drying device 12.

  In the above-described embodiments, wet fuel is applied as a raw material, and low-grade coal is used as the wet fuel. However, even high-grade coal is applicable, and is not limited to coal and can be regenerated. Biomass may be used as a biological organic resource. For example, thinned wood, waste wood, driftwood, grass, waste, sludge, tires, and recycled fuel (pellets and chips) made from these raw materials Can also be used. The raw material is not limited to wet fuel.

DESCRIPTION OF SYMBOLS 11 Coal feeder 12 Fluidized bed dryer 13 Pulverized coal machine 14 Coal gasifier 16 Gas refiner 17 Gas turbine equipment 18 Steam turbine equipment 19 Generator 20 Waste heat recovery boiler 101 Drying vessel 102, 201, 221, 241 Raw coal Supply device (raw material supply device, wet fuel supply device)
103 Dry coal discharge port (dry matter discharge part)
104, 104a, 104b, 104c Fluidized steam supply unit (fluidized gas supply device)
105 Gas exhaust port 106, 107, 108 Heat transfer tube 110 Air chamber (fluidized gas supply device)
111 First drying chamber 112 Second drying chamber 113 Third drying chamber 114, 115 Partition plate 116, 117 Passing opening 118, 119 Partition plate 121 Steam supply line (fluidizing gas supply device)
131, 202, 222, 242 Disperser 132 Raw coal supply section (raw material supply section)
133, 223 Rotation drive unit 143 Raw coal supply path (raw material supply path)
144 Rotating shaft 146, 251, 252, 253, 254 Guide member 213, 231 Drying gas ejection portion 261 Temperature sensor (fluidized bed state detection sensor)
262 Control device 271 Vertical movement device F, F1, F2, F3 Free board part S, S1, S2, S3 Fluidized bed

Claims (11)

It is rotatably supported by a rotating shaft that hangs down along the vertical direction at the top of the container, forms a cone shape with a horizontal cross-section increased downward, and the radial surface length is continuous in the circumferential direction. A different disperser,
A raw material supply unit capable of supplying a powdery raw material from the upper part of the container toward the disperser;
A rotary drive device capable of rotating the disperser;
I have a,
The disperser has a surface length in the radial direction that increases along the circumferential direction.
The raw material supply apparatus characterized by the above-mentioned. It is rotatably supported by a rotating shaft that hangs down along the vertical direction at the top of the container, forms a cone shape with a horizontal cross-section increased downward, and the radial surface length is continuous in the circumferential direction. A different disperser,
A raw material supply unit capable of supplying a powdery raw material from the upper part of the container toward the disperser;
A rotary drive device capable of rotating the disperser;
I have a,
The plurality of drying gas ejection portions are arranged in the circumferential direction of the disperser, whereby the rotation driving device is configured.
The raw material supply apparatus characterized by the above-mentioned.   The raw material supply apparatus according to claim 1, wherein the disperser is provided with a guide member on a surface along the radial direction at a position where the surface length in the radial direction is the longest.   The raw material supply apparatus according to claim 3, wherein a plurality of the guide members are provided at predetermined intervals in the circumferential direction.   The raw material supply apparatus according to claim 1, wherein the disperser has a conical shape.   The raw material supply path along the vertical direction is provided as the raw material supply section, and the rotating shaft of the disperser is arranged along the center of the raw material supply path. The raw material supply apparatus as described in one.   The disperser includes a hollow portion inside the conical shape, a drying gas supply device that supplies a drying gas to the hollow portion, and a plurality of drying gases that can eject drying gas from the hollow portion to the surface side. It has a jet part, The raw material supply apparatus as described in any one of Claim 1 to 6 characterized by the above-mentioned. The disperser is supported movably along the vertical direction, according to any one of claims 1 to 7, characterized in that the vertical moving device movable is provided the disperser in the vertical direction Raw material supply equipment. A step of rotating a disperser having a conical shape with an increased horizontal cross-sectional area downward and a radial surface length extending along a circumferential direction by a rotating shaft along a vertical direction;
Supplying a powdery raw material from above to the surface of the disperser;
The raw material supply method characterized by having. A dry container having a hollow shape as the container and provided with a wet fuel supply device on one end side and a dry matter discharge part on the other end side;
A partition member in which the dry container is divided in a flow direction in which the wet fuel is directed toward the dry matter discharge portion to form a plurality of divided dry chambers and a wet fuel passage opening is formed;
A fluidized gas supply device that forms a fluidized bed with a wet raw material by supplying fluidized gas from below the plurality of divided drying chambers;
In a fluidized bed drying apparatus having
9. A fluidized bed drying apparatus, wherein the raw material supply apparatus according to claim 1 is applied as the wet fuel supply apparatus. A fluidized bed state detection sensor for detecting a state of a plurality of regions in which the fluidized bed is partitioned for each predetermined size, and the disperser by the rotary drive device based on detection results of the plurality of fluidized bed state detection sensors The fluidized bed drying apparatus according to claim 10 , further comprising a control device that controls at least one of a rotation speed of the vertical movement device and a vertical movement of the vertical movement device.

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