JP2014159001A - Raw material feeding device and method, and fluid bed dryer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a feeding device and method and fluid bed dryer, which allows for uniform supply of raw material with improved drying efficiency, without enlargement of the device.SOLUTION: Provided are: a distributor 131 having a plurality of vanes 145, 146, and 147 arranged at prescribed intervals in circumferential direction, which are rotatably supported by a rotational axis 144 hanging down above a dehydration vessel 101 in vertical direction and have different downward inclination angles relative to horizontal direction; a coal supply part 132 which can supply coal from above the dehydration vessel 101 toward the distributor 131; and a rotary driving device 133 which can rotate the distributor 131.

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 combined coal gasification power generation facility is a power generation facility that aims to further increase the efficiency and environmental performance compared to conventional coal-fired power generation by gasifying coal and combining it with combined cycle power generation. 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 have a coal supply device, a drying device, a coal gasification furnace, a gas purification device, a gas turbine facility, a steam turbine facility, an exhaust heat recovery boiler, a gas purification device, and the like. ing. 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, since the raw material is uniformly supplied to the upper part of the fluidized bed by the charging path, the inclination angle of this charging path becomes almost horizontal, and there is a concern about the adhesion of the raw material to the charging path, making it difficult to stably supply the raw material. It becomes. Further, in the conventional diffusion charging apparatus described in Patent Document 2 described above, since each diffusion portion of the diffusion plate is horizontal, it is difficult to uniformly supply the raw material to the upper part of the fluidized bed.

  The present invention solves the above-described problems, and an object of the present invention is to provide a raw material supply apparatus and method that can uniformly supply raw materials while suppressing an increase in size of the apparatus. It is another object of the present invention to provide a fluidized bed drying apparatus that can suppress the increase in size of the apparatus and can uniformly supply wet fuel to the fluidized bed, thereby improving the drying efficiency.

  In order to achieve the above object, the raw material supply apparatus of the present invention is rotatably supported by a rotating shaft that hangs down in the vertical direction on the upper part of the container, and has a plurality of downward inclination angles different from each other in the horizontal direction. A disperser in which blades are provided at predetermined intervals in the circumferential direction; a material supply unit capable of supplying a material from the upper part of the container toward the disperser; and a rotary drive device capable of rotating the disperser. It is characterized by.

  Accordingly, the disperser is provided with a plurality of blades having different downward inclination angles with respect to the horizontal direction at predetermined intervals in the circumferential direction. Therefore, the disperser is rotated by the rotation driving device and directed from the raw material supply unit toward the disperser. When the raw material is supplied, the raw material collides with each blade in the rotating disperser and falls. At this time, the raw material falls while being moved outward by the centrifugal force of a plurality of rotating blades, but since the inclination angle of each blade is different, the falling position is different in the radial direction. And an increase in size of the apparatus can be suppressed.

  The raw material supply apparatus of the present invention is characterized in that the plurality of blades are set to have a longer overall length as the inclination angle is larger.

  Therefore, by making the inclination angles of the plurality of blades different and making the total lengths different, the raw material can be dispersed over a wide range without increasing the radial dimension in the disperser.

  The raw material supply apparatus of the present invention is characterized in that the plurality of blades are set to have substantially the same length in the radial direction in a plan view as viewed from the vertical direction.

  Therefore, by making the inclination angles of the plurality of blades different, the raw material can be dispersed over a wide range without enlarging the radial dimension of the disperser.

  The raw material supply apparatus of the present invention is characterized in that a plurality of blades having different inclination angles are alternately arranged in the circumferential direction.

  Accordingly, since the plurality of blades having different inclination angles are alternately arranged in the circumferential direction, when the disperser rotates, the supplied raw material can be supplied uniformly over a wide range.

  In the raw material supply apparatus of the present invention, the plurality of blades are provided with a predetermined twist angle that is inclined with respect to the rotation direction.

  Therefore, since the predetermined twist angle is provided for the plurality of blades, when the disperser rotates, the supplied raw material can be uniformly supplied over a wide range.

  In the raw material supply apparatus of the present invention, the raw material supply unit has a plurality of raw material supply paths provided around the rotating shaft.

  Therefore, by providing a plurality of raw material supply paths as the raw material supply section, a large amount of raw materials can be supplied at a time, and a plurality of blades are arranged below the rotating shaft, and a plurality of blades are arranged toward each blade. The raw material is supplied from the raw material supply path, and a large amount of raw material can be appropriately dispersed and supplied.

  The raw material supply method of the present invention includes a step of rotating a disperser in which a plurality of blades having different inclination angles with respect to the horizontal direction are provided at predetermined intervals in the circumferential direction by a rotating shaft along the vertical direction, and the disperser from above. And a step of supplying a raw material toward the surface.

  Accordingly, the raw material falls while being moved outward by the centrifugal force of the rotating blades, and falls at a position where the inclination angle of each blade is different, so that the raw material can be supplied uniformly, An increase in the size of the apparatus can be suppressed.

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

  Accordingly, when the wet fuel supply device supplies wet fuel to the drying container, the wet fuel falls while being moved outward by the centrifugal force of the rotating blades, and the inclination angles of the blades are different. Therefore, the wet fuel can be uniformly supplied to the fluidized bed, and the increase in the size of the apparatus can be suppressed.

  According to the raw material supply apparatus and method of the present invention, it is possible to rotate a disperser in which a plurality of blades having different downward inclination angles with respect to the horizontal direction are provided at predetermined intervals in the circumferential direction, and to the raw material toward the disperser Is provided, so that the raw material can be supplied uniformly and an increase in the 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. In addition, since the raw material supply device is applied as the wet fuel supply device, it is possible to uniformly supply the wet fuel to the fluidized bed and to suppress an increase in the size of the device.

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 coal supply apparatus in the fluidized bed drying apparatus according to the first embodiment. FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 2 showing the coal supply apparatus. FIG. 4 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. 5 is a schematic diagram illustrating a coal supply apparatus in a fluidized bed drying apparatus according to Embodiment 2 of the present invention. 6 is a cross-sectional view taken along the line VI-VI in FIG. 5 showing the coal supply apparatus. FIG. 7 is a schematic diagram illustrating a coal supply apparatus in a fluidized bed drying apparatus according to Embodiment 3 of the present invention. FIG. 8 is a schematic view showing a fluidized bed drying apparatus according to a modification 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.

  FIG. 1 is a schematic diagram illustrating a fluidized bed drying apparatus according to a first embodiment of the present invention, FIG. 2 is a schematic diagram illustrating a coal feeding apparatus in the fluidized bed drying apparatus according to the first embodiment, and FIG. 2 is a cross-sectional view taken along the line III-III in FIG. 2, and FIG.

  The coal gasification combined power generation facility (IGCC: Integrated Coal Gasification Combined Cycle) of Example 1 adopts an air combustion method in which coal gas is generated in a gasification furnace using air as an oxidizer, and is purified by a gas purifier. Coal gas is supplied as fuel gas to a gas turbine facility for power generation. That is, the coal gasification combined power generation facility of Example 1 is an air combustion type (air blowing) power generation facility.

  In Example 1, as shown in FIG. 4, 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 crush the dropped coal into a predetermined size.

  The fluidized bed drying device 12 supplies fluidized steam (fluidized gas) to the coal introduced by the coal feeder 11 so as to heat and dry the coal while flowing, and the moisture contained in the 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 coal supply device 102, a dry coal discharge port (dry matter discharge unit) 103, and fluidization The gas 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 is applied to a coal supply apparatus (wet fuel supply apparatus) 102 and described.

  The drying container 101 has a hollow box shape, and is provided with a coal supply device 102 that supplies coal to an upper portion on one end side, and dry coal that discharges dry coal obtained by heating and drying coal to the lower portion on the other end side. A 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 fluidizing gas supply unit 104 (104a, 104b, 104c) that supplies fluidizing 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 container 101 is supplied with coal from the coal supply device 102 and supplied with fluidizing gas from the fluidizing gas supply unit 104 through the wind chamber 110 and the dispersion plate 109, so that the drying container 101 is disposed above the dispersion plate 109. A fluidized bed S having a predetermined thickness is formed, and a free board portion F is formed 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 coal flow direction and a second drying chamber (downstream chamber provided on the downstream side of the first drying chamber 111). (Division drying chamber) 112 and a third drying chamber (division drying chamber) 113 provided on the most downstream side in the flow direction of coal.

  More specifically, the drying container 101 includes a plurality (two in this embodiment) of fluidized beds S in the direction of coal flow (three in this embodiment) by a plurality of (two in this embodiment) partition plates (partition members) 114 and 115. It is divided into In the drying container 101, 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 coal, and are arranged at predetermined intervals in the flow direction of coal. Installed on. 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 (preheating drying region) where the freeboard portion F1 and the fluidized bed S1 are formed and the initial drying of the coal is performed. In the second drying chamber 112, the free board portion F2 and the fluidized bed S2 are formed, and the second drying chamber 112 is an area (fixed rate drying area) for performing the intermediate drying of coal. In the third drying chamber 113, the freeboard portion F3 and the fluidized bed S3 are formed, and the third drying chamber 113 is a region where the coal is later dried (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 the coal. 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 coal is increased to a predetermined moisture content because the moisture content of the input coal is high. Since the drying rate of coal rises to a predetermined drying rate and becomes constant, the second drying chamber 112 is a constant rate drying region in which the drying rate of coal is constant. Since the drying rate of coal falls when the moisture content of coal reaches a predetermined moisture content (limit moisture content), the third drying chamber 113 is a reduced rate drying region in which the drying rate of coal decreases. 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 the present embodiment) partition plates 118 and 119 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. The activated gas supply units 104a, 104b, and 104c are provided.

  The partition plates 118 and 119 are arranged along a vertical direction orthogonal to the flow direction of coal, and are arranged at predetermined intervals in the flow direction of coal, and the left and right ends are on the inner wall surface of the drying container 101. Installed. Thus, the drying container 101 is partitioned into the first air chamber 101a, 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 gas 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 the present embodiment, the upstream drying chamber in the coal flow direction is set to have a higher superficial velocity.

  The fluidized gas supply device of the present invention includes a fluidized steam supply unit 104 (104a, 104b, 104c), 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 coal flows in the room. This extruding flow is a flow of extruding this coal in the fluidizing direction so that the coal does not diffuse in the fluidizing direction in the fluidized bed S.

  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, and 108 are positioned so as to be embedded in the fluidized beds S1, S2, and S3, and the coal in the fluidized beds S1, S2, and S3 is heated and dried by the fluidized gas flowing inside. can do. 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.

  Therefore, the coal supplied to the first drying chamber 111 is fluidized by the fluidizing gas and heated by the heat transfer tube 106 to be dried. Then, the coal initially dried in the first drying chamber 111 is moved to the second drying chamber 112 through the passage opening 116 at the lower portion of the partition plate 114, and is heated by the heat transfer tube 107 here. Dried. Then, the coal dried in the second stage in the second drying chamber 112 is moved to the third drying chamber 113 through the passage opening 117 at the lower part of the partition plate 115, where it is heated by the heat transfer tube 108 to be in the latter period. Dried.

  As a result, the 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. Therefore, it can be made an extruded flow and is dried without being diffused in the flow direction.

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

  As shown in FIGS. 1 to 3, the 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 coal supply unit 132, and a rotation drive device 133. 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 rotating shaft 144 is rotatably supported by the casing 141 by upper and lower bearing portions 142 and 143. The rotating shaft 144 is suspended along the vertical direction on the upper part of the drying container 101, the rotation driving 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 is provided with a plurality (eight in this embodiment) of blades 145, 146, and 147 having different downward inclination angles with respect to the horizontal direction at predetermined intervals in the circumferential direction.

  More specifically, the disperser 131 has a plurality of blades 145, 146, 147 extending downward from a support portion 148 fixed to the lower end portion of the rotating shaft 144. The first blade 145 has the smallest inclination angle θ with respect to the horizontal direction, the third blade 147 has the largest inclination angle θ with respect to the horizontal direction, and the second blade 146 has the inclination angle with respect to the horizontal direction. θ is set to an intermediate angle between the first blade 145 and the third blade 147.

  The first blade 145 is set to have the shortest total length L, the third blade 147 is set to have the longest total length L, and the second blade 146 has a total length L that is the same as that of the first blade 145 and the third blade 145. The intermediate length of the blade 147 is set.

  The first blade 145, the second blade 146, and the third blade 147 are alternately arranged in the circumferential direction (the rotating direction of the disperser 131). That is, the first blade 145, the second blade 146, the third blade 147, the second blade 146, the first blade 145, the second blade 146, the third blade 147, and the second blade 146 They are lined up in the circumferential direction. The eight blades 145, 146, and 147 are set to have substantially the same length in the radial direction in a plan view viewed from the vertical direction.

  In addition, the casing 141 is provided with a plurality (four in this embodiment) of raw material supply paths 151 around the rotating shaft 144. Each raw material supply path 151 has a cylindrical shape and is provided so as to penetrate the casing 141 in the vertical direction. The casing 141 is provided with a coal storage device 152, and a coal conveyance device (conveyance conveyor) 153 is disposed below the coal storage device 152. The coal conveyance device 153 conveys the coal dropped from the coal storage device 152 in the horizontal direction and supplies it to the coal supply path 151.

  The coal supply unit 132 described above is capable of supplying coal from the upper part of the drying container 101 toward the disperser 131, and includes a coal storage device 152, a coal transport device 153, a coal supply path 151, and the like. Yes.

  In the coal supply method using the coal supply apparatus 102 configured as described above, a disperser 131 in which a plurality of blades 145, 146 and 147 having different inclination angles with respect to the horizontal direction are provided at predetermined intervals in the circumferential direction is provided in the vertical direction. And a step of rotating by the rotating shaft 144 along, and a step of supplying the raw material from above to 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, the coal is supplied from the coal supply device 102 to the drying container 101, and the fluidized steam is supplied from the fluidized steam supply unit 104 through the dispersion plate 109. A fluidized bed S 1, S 2, S 3 having a predetermined thickness is formed above 109. The coal moves the fluidized beds S1, S2, S3 to the dry coal discharge port 103 side by the fluidized steam, and at this time, the coal is heated and dried by receiving heat from the heat transfer tubes 106, 107, 108.

  That is, in the 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 coal stored in the coal storage device 152 falls to the coal transport device 153. It is supplied to the coal supply path 151 by the coal conveying device 153. Then, the coal that freely falls in the coal supply path 151 falls almost uniformly in the circumferential direction toward the surface of each blade 145, 146, 147 in the rotating disperser 131, and each of the rotating blades 145, 146, 147 rotates. , Collides with the surface of the fluid, descends in the radial direction, and falls onto the surface of the fluidized bed S1. In addition, the coal passes between the blades 145, 146, and 147 in the rotating disperser 131, descends almost uniformly in the circumferential direction, and falls as it is onto the surface portion of the fluidized bed S1.

  At this time, in the disperser 131, the blades 145, 146, and 147 are arranged at predetermined intervals, and the inclination angles thereof are different, so that coal falls at different positions in the radial direction of the disperser 131. That is, the coal falls almost uniformly in the circumferential direction with respect to the disperser 131 that rotates through each coal supply path 151. And the coal which collided with each blade | wing 145,146,147 in the disperser 131 falls in the position which differs in the radial direction of the disperser 131 according to the inclination angle. In addition, the coal that has passed through the blades 145, 146, and 147 in the disperser 131 falls as it is.

  That is, since the coal descending toward the disperser 131 is supplied from each coal supply channel 151 substantially uniformly in the circumferential direction and the radial direction of the disperser 131, the coal in the circumferential direction and the radial direction with respect to the fluidized bed S1. Almost uniformly supplied. Also, the coal that has passed between the blades 145, 146, and 147 is supplied at that position, and the coal that has collided with the blades 145, 146, and 147 is blown to the outside and has different radiation depending on the inclination angle. Supplied in the direction position.

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

  Next, the coal that has been initially dried in the first drying chamber 111 flows to 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 coal is dried while flowing in the fluidized bed S2 by receiving the fluidized steam and the heat from the heat transfer tube 107. Then, the coal whose medium-term drying is finished 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 coal is dried while flowing in the fluidized bed S3 by receiving the fluidized steam and the heat from the heat transfer tube. In this way, the 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 does not diffuse in the flow direction as an extruded flow. Dried.

  Then, the dry coal from which the 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 coal in the fluidized bed S rises together with the fluidized steam, and the dry coal discharge port The gas flows to the 103 side and is discharged to the outside through the gas discharge port 105.

  Thus, in the coal supply apparatus 102 of Example 1, it is rotatably supported by the rotating shaft 144 suspended along the vertical direction at the upper part of the drying container 101, and the downward inclination angle with respect to the horizontal direction is different. A disperser 131 in which a plurality of blades 145, 146, and 147 are provided at predetermined intervals in the circumferential direction; a coal supply unit 132 capable of supplying coal from the top of the drying vessel 101 toward the disperser 131; and the disperser 131 A rotatable drive device 133 is provided.

  Accordingly, the disperser 131 is provided with a plurality of blades 145, 146, and 147 having different downward inclination angles with respect to the horizontal direction at predetermined intervals in the circumferential direction. When coal is supplied from the supply unit 132 toward the disperser 131, the coal collides with each blade 145, 146, 147 in the rotating disperser 131 and falls. At this time, the coal falls while being moved outward by the centrifugal force of the rotating blades 145, 146, 147. However, since the inclination angles of the blades 145, 146, 147 are different, the falling position is radiated. It becomes different in the direction, and the coal can be supplied uniformly over a wide area of the fluidized bed S1, and the enlargement of the apparatus can be suppressed.

  In this case, the plurality of blades 145, 146, and 147 are set to have a longer overall length as the inclination angle is larger, so that the coal can be dispersed over a wide range without increasing the radial dimension in the disperser 131. it can. Further, the lengths in the radial direction are set to substantially the same length in a plan view when the plurality of blades 145, 146, 147 are viewed from the vertical direction, and only the inclination angles of the blades 145, 146, 147 are different. The coal can be dispersed over a wide range without enlarging the radial dimension of the disperser 131. Furthermore, a plurality of blades 145, 146, 147 having different inclination angles are alternately arranged in the circumferential direction, and when the disperser 131 rotates, the supplied coal is uniformly supplied over a wide range of the fluidized bed S1. Can do.

  In the coal supply apparatus 102 according to the first embodiment, a plurality of raw material supply paths 151 are provided around the rotating shaft 144 as the raw material supply unit 132. Accordingly, a large amount of coal can be supplied at one time, and a plurality of blades 145, 146, 147 are arranged below the rotating shaft 144, and a plurality of raw material supply paths are directed toward the blades 145, 146, 147. The coal is supplied from 151, and a large amount of coal can be appropriately dispersed and supplied. In addition, since the disperser 131 is disposed at the center of the plurality of raw material supply paths 151 via the rotating shaft 144, the function of supplying coal can be centrally arranged in one place, and the number of parts can be reduced. In addition, the maintainability of the device can be improved.

  In the coal supply method according to the first embodiment, the disperser 131 in which a plurality of blades 145, 146, and 147 having different inclination angles with respect to the horizontal direction are provided at predetermined intervals in the circumferential direction is provided on the rotary shaft 144 along the vertical direction. And a step of supplying coal from above to the disperser 131.

  Accordingly, the coal falls while being moved outward by the centrifugal force of the rotating blades 145, 146, 147, and falls at positions where the inclination angles of the blades 145, 146, 147 are different. Can be uniformly supplied to the fluidized bed S1, and the increase in size of the apparatus can be suppressed.

  Moreover, in the fluidized bed drying apparatus 12 of Example 1, the drying container 101 and the partition plates 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. The fluidizing gas supply unit 104 that forms fluidized beds S1, S2, and S3 together with coal by supplying fluidized gas from below the drying chambers 111, 112, and 113 is provided as the coal supply device 102 described above. The disperser 131, the coal supply part 132, and the rotation drive device 133 are provided.

  Therefore, when the coal supply apparatus 102 supplies coal to the drying container 101, the coal falls while being moved outward by the centrifugal force of the rotating blades 145, 146, 147, and the blades 145, 146 , 147 fall at a position where the inclination angles are different, coal can be supplied uniformly to the fluidized bed S1 and the apparatus can be prevented from being enlarged.

  FIG. 5 is a schematic diagram illustrating a coal supply apparatus in a fluidized bed drying apparatus according to Embodiment 2 of the present invention, and FIG. 6 is a cross-sectional view taken along the line VI-VI in FIG. 5 illustrating the coal supply apparatus. 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 FIGS. 5 and 6, the coal supply device 201 is provided in the upper part of the first drying chamber 111 in the drying container 101, and includes a disperser 202, a coal supply unit 132, and a rotation. And a driving 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 rotating shaft 144 is rotatably supported by the casing 141 by bearings 142 and 143. The rotary shaft 144 has an upper end connected to the rotary drive device 133 and a lower end connected to the disperser 202.

  In the disperser 202, a plurality (eight in this embodiment) of blades 211, 212, and 213 having different downward inclination angles with respect to the horizontal direction are provided at predetermined intervals in the circumferential direction. In this case, the first blade 211 has the smallest inclination angle θ with respect to the horizontal direction, the third blade 213 has the largest inclination angle θ with respect to the horizontal direction, and the second blade 212 has the horizontal direction. Is set to an intermediate angle between the first blade 211 and the third blade 213.

  The first blade 211 is set to have the shortest total length L, the third blade 213 is set to have the longest total length L, and the second blade 212 has a total length L that is the same as that of the first blade 211 and the third blade. The intermediate length of the blade 213 is set. And this 1st blade | wing 211, the 2nd blade | wing 212, and the 3rd blade | wing 213 are alternately arrange | positioned in the circumferential direction (rotation direction of the disperser 202).

  The plurality of blades 211, 212, and 213 are provided with a predetermined twist angle that is inclined with respect to the rotation direction of the disperser 202. That is, each blade | wing 211,212,213 is arrange | positioned in the position rotated only the predetermined angle in the circumferential direction with respect to the axial center along the longitudinal direction.

  In the coal supply device 201 of the second embodiment 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 coal stored in the coal storage device 152 is coal. It falls to the transport device 153 and is supplied to the coal supply path 151 by the coal transport device 153. Then, the coal that freely falls in the coal supply path 151 falls almost uniformly in the circumferential direction toward the surface of each blade 211, 212, 213 in the rotating disperser 202, and each rotating blade 211, 212, 213 rotates. , Collides with the surface of the fluid, descends in the radial direction, and falls onto the surface of the fluidized bed S1. In addition, the coal passes between the blades 211, 212, and 213 in the rotating disperser 202, descends substantially uniformly in the circumferential direction, and falls as it is onto the surface portion of the fluidized bed S1.

  At this time, in the disperser 202, the blades 211, 212, and 213 are arranged at predetermined intervals, and the inclination angles thereof are different, so that coal falls at different positions in the radial direction of the disperser 202. That is, the coal falls almost uniformly in the circumferential direction with respect to the disperser 202 rotating through each coal supply path 151. And the coal which collided with each blade | wing 211,212,213 in the disperser 202 falls to a different position in the radial direction of the disperser 202 according to the inclination angle. Further, the coal that has passed through the blades 211, 212, and 213 in the disperser 202 falls as it is.

  The disperser 202 is twisted so that the blades 211, 212, and 213 are inclined with respect to the rotation direction of the disperser 202. Therefore, coal that collides with each blade 211, 212, 213 in the disperser 202 falls to different positions in the circumferential direction of the disperser 202 according to the twist angle.

  Thus, in the 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 the downward inclination angle with respect to the horizontal direction is different. A disperser 202 in which a plurality of blades 211, 212, 213 are provided at predetermined intervals in the circumferential direction is provided, and each blade 211, 212, 213 is provided with a predetermined twist angle that is inclined with respect to the rotation direction of the disperser 202. Yes.

  Accordingly, when the disperser 202 is rotated by the rotation driving device 133 and coal is supplied from the raw material supply unit 132 to the disperser 202, the coal is supplied to the blades 211, 212, and 213 in the rotating disperser 202. Collide and fall. At this time, the coal falls while being moved outward and circumferentially by the centrifugal force of the rotating blades 211, 212, and 213. However, since the inclination angles of the blades 211, 213, and 213 are different, the coal falls. The position is different in the radial direction, and coal can be supplied uniformly over a wide area of the fluidized bed S1.

  FIG. 7 is a schematic diagram illustrating a coal supply apparatus in a fluidized bed drying apparatus according to Embodiment 3 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 3, as shown in FIG. 7, the 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 131, a coal supply unit 222, and a rotary 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 rotating shaft 144 is rotatably supported by the casing 141 by bearings 142 and 143. The rotary shaft 144 has an upper end connected to the rotation drive device 133 and a lower end connected to the disperser 131.

  In the disperser 131, a plurality (eight in this embodiment) of blades 145, 146, and 147 having different downward inclination angles with respect to the horizontal direction are provided at predetermined intervals in the circumferential direction.

  The casing 141 is provided with a raw material supply path 231 concentrically with the rotating shaft 144. The raw material supply path 231 has a cylindrical shape and is provided so as to penetrate the casing 141 in the vertical direction. The casing 141 is provided with a coal storage device 232, and a coal conveyance device (conveyance conveyor) 233 is disposed below the coal storage device 232. The coal conveying device 233 conveys the coal dropped from the coal storage device 232 in the horizontal direction and supplies it to the coal supply path 231.

  In the coal supply device 221 of Example 3 configured as described above, the disperser 131 is rotated in the R direction by the rotation drive device 133 via the rotation shaft 144, while the coal stored in the coal storage device 232 is coal. It falls to the conveying device 233 and is supplied to the coal supply path 231 by the coal conveying device 233. Then, the coal that freely falls in the coal supply path 231 falls almost uniformly in the circumferential direction toward the surface of each blade 145, 146, 147 in the rotating disperser 131, and each of the rotating blades 145, 146, 147 rotates. , Collides with the surface of the fluid, descends in the radial direction, and falls onto the surface of the fluidized bed S1. In addition, the coal passes between the blades 145, 146, and 147 in the rotating disperser 131, descends almost uniformly in the circumferential direction, and falls as it is onto the surface portion of the fluidized bed S1.

  Thus, in the coal supply apparatus 221 of Example 3, it is rotatably supported by the rotating shaft 144 suspended along the vertical direction on the upper part of the drying container 101, and the downward inclination angle with respect to the horizontal direction is different. A disperser 131 in which a plurality of blades 145, 146, and 147 are provided at predetermined intervals in the circumferential direction; a coal supply unit 222 capable of supplying coal from the top of the drying vessel 101 toward the disperser 131; and the disperser 131 A rotatable drive device 133 is provided.

  Accordingly, when the disperser 131 is rotated by the rotation driving device 133 and the coal is supplied from the raw material supply unit 222 toward the disperser 131, the coal is supplied to each blade 145, 146, 147 in the rotating disperser 131. Collide and fall. At this time, the coal falls while being moved outward by the centrifugal force of the rotating blades 145, 146, 147. However, since the inclination angles of the blades 145, 146, 147 are different, the falling position is radiated. It becomes different in the direction, and coal can be supplied uniformly over a wide area of the fluidized bed S1.

  Moreover, in the coal supply apparatus 221 of Example 3, the coal supply path 231 along the vertical direction is provided as the coal supply unit 222, and the rotating shaft 144 of the disperser 131 is disposed along the center of the coal supply path 231. Yes. Therefore, by disposing the rotating shaft 144 of the disperser 131 in the coal supply path 231, the apparatus can be made compact and the coal can be appropriately supplied to the disperser 131.

  In the above-described embodiment, eight blades 145, 146, 147, 211, 212, and 213 are provided as the dispersers 131 and 202. However, the number is not limited to the embodiment. Further, the width, length, and arrangement of the blades 145, 146, 147, 211, 212, and 213 are not limited to those in the embodiment, and may be set as appropriate depending on the shape of the container and the properties of the raw materials. .

  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. The configuration and arrangement of the shape of the drying container 101, the coal supply devices 102, 201, 221, the dry coal discharge port 103, the fluidized gas supply unit 104, the gas discharge port 105, and the heat transfer tubes 106, 107, 108 are as follows. It is not limited to an Example, According to the installation place of a fluidized bed drying apparatus 12, an application, etc., it can change suitably. That is, the wet fuel drying system of the present invention does not depend on the form of the fluidized bed drying apparatus.

  FIG. 8 is a schematic view showing a fluidized bed drying apparatus according to a modification of the present invention. As shown in FIG. 8, the fluidized bed drying device 301 includes a drying container 301, a coal supply device 302, a dry coal discharge port 303, a fluidized gas supply unit 304, a gas discharge port 305, and a heat transfer tube 306. have.

  The drying container 301 is divided into an upper drying chamber 311 and a lower wind box 310 by providing a dispersion plate 309 having a plurality of through holes in the lower portion. The drying container 301 is provided with a fluidizing gas supply unit 304 that supplies fluidizing gas from the wind box 310 to the drying chamber 311 through the dispersion plate 309.

  The drying container 301 is supplied with coal from the coal inlet 302 and supplied with fluidizing gas from the fluidizing gas supply unit 304 through the wind box 310 and the dispersion plate 309, so that the drying container 301 is disposed above the dispersion plate 309. A fluidized bed S having a predetermined thickness is formed, and a free board portion F is formed above the fluidized bed S. Here, the drying container 301 includes a single drying chamber 311.

  Moreover, the coal supply apparatus 302 is provided in the upper part of the drying chamber 311 in the drying container 301, and has the disperser 312 and the coal supply part and rotation drive which are not shown in figure. Since this coal supply device 302 is the same as any of the coal supply devices 102, 201, and 221 described above, description thereof is omitted.

  As described above, in the modified example, the drying container 301 and the fluidizing gas supply unit 304 that forms the fluidized bed S together with the coal by supplying the fluidizing gas from below the drying chamber 311 are provided. A disperser 312, a coal supply unit, and a rotation drive device are provided. Therefore, the coal can be supplied uniformly to the fluidized bed S, and an increase in the size of the apparatus can be suppressed.

  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 101,301 Drying vessel 102,201,221,302 Coal feeder (raw material feeder, wet fuel feeder)
103,303 Dry coal discharge port (dry matter discharge part)
104, 104a, 104b, 104c, 304 Fluidized gas supply unit (fluidized gas supply device)
105,305 Gas exhaust port 106,107,108,306 Heat transfer tube 110,310 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, 311 Disperser 132, 222 Coal supply unit (raw material supply unit)
133 Rotation drive device 144 Rotating shaft 145, 146, 147, 211, 212, 213 Blade 151, 231 Coal supply path (raw material supply path)
F, F1, F2, F3 Free board part S, S1, S2, S3 Fluidized bed

Claims (8)

A disperser in which a plurality of blades that are rotatably supported by a rotating shaft that hangs down in the vertical direction on the top of the container and that have different downward inclination angles with respect to the horizontal direction are provided at predetermined intervals in the circumferential direction;
A raw material supply unit capable of supplying the raw material from the upper part of the container toward the disperser;
A rotary drive device capable of rotating the disperser;
The raw material supply apparatus characterized by having.   The raw material supply apparatus according to claim 1, wherein the plurality of blades are set to have a longer overall length as the inclination angle is larger.   The raw material supply apparatus according to claim 1 or 2, wherein the plurality of blades are set to have substantially the same length in the radial direction in a plan view as viewed from the vertical direction.   The raw material supply apparatus according to any one of claims 1 to 3, wherein the plurality of blades having different inclination angles are alternately arranged in a circumferential direction.   The raw material supply apparatus according to claim 1, wherein the plurality of blades are provided with a predetermined twist angle that is inclined with respect to a rotation direction.   The raw material supply apparatus according to claim 1, wherein the raw material supply unit includes a plurality of raw material supply paths provided around the rotation shaft. A step of rotating a disperser in which a plurality of blades having different inclination angles with respect to the horizontal direction are provided at predetermined intervals in the circumferential direction by a rotation axis along the vertical direction;
Supplying raw materials from above to the disperser;
The raw material supply method characterized by having. A drying container having a hollow shape and provided with a wet fuel supply device on one end side and a dry matter discharge section on the other end side;
A partition member in which the drying container is divided in the flow direction of the wet fuel to form a plurality of divided drying chambers and a wet fuel passage opening is formed;
A fluidized gas supply device that forms a fluidized bed with wet fuel by supplying fluidized gas from below the plurality of divided drying chambers;
In a fluidized bed drying apparatus having
A fluidized bed drying apparatus, wherein the raw material supply apparatus according to any one of claims 1 to 6 is applied as the wet fuel supply apparatus.

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