AU2015202159B2 - Fluid bed drying apparatus and fluid bed drying facility - Google Patents

Abstract

Provided is a fluid bed drying apparatus or a fluid bed drying facility including: a drying container (101) formed in a hollow shape; a raw coal input port (102) for 5 inputting raw coal to one end side of the drying container (101); a dry coal discharge port (103) for discharging dry coal obtained by heating and drying the raw coal from the other end side of the drying container (101); a fluidizing gas supply port (104) for supplying a fluidizing gas to a 10 lower portion of the drying container (101) so as to form a fluid bed (S) along with the raw coal; a gas discharge port (105) for discharging the fluidizing gas and product steam from the upside of the raw coal input port (102) at one end side of the drying container (101); a heat transfer pipe 15 (106) for heating the raw coal of the fluid bed (S); and an inclined plate (111) for guiding the fluidizing gas and the product steam to flow from the dry coal discharge port (103) toward the raw coal input port (102) so as to guide the fluidizing gas and the product steam to the gas 20 discharge port (105).

Description

1 DESCRIPTION FLUID BED DRYING APPARATUS AND FLUID BED DRYING FACILITY Field [0001] The present invention relates to a fluid bed 5 drying apparatus which dries a subject drying material by a fluidizing gas and a fluid bed drying facility which includes a fluid bed drying apparatus for drying a wet raw material. Background 10 [00021 For example, an integrated coal gasification combined cycle is a power generating facility that gasifies coal and generates power by the combination with a combined cycle power generation technique. This power generating facility aims at high efficiency and high environment 15 property compared to a conventional coal fired power generation technique. The integrated coal gasification combined cycle has much merit that coal existing as rich resources may be used. Also, it is known that the more merit is obtained with an increase in the number of the 20 application coal types. [0003] The conventional integrated coal gasification combined cycle generally includes a coal supply device, a drying device, a coal gasification furnace, a gas purification device, a gas turbine facility, a steam 25 turbine facility, an exhausted heat recovery boiler, a gas purification device, and the like. Accordingly, coal is dried and milled, and the coal is supplied as pulverized coal into the coal gasification furnace. At this time, air is supplied into the coal gasification furnace, and the 30 coal inside the coal gasification furnace becomes a combustion gas, so that a product gas (combustible gas) is produced. Then, the product gas is purified and is supplied to the gas turbine facility. Here, the product 2 gas is burned to thereby produce a hot and pressurized combustion gas, and the turbine is driven by the combustion gas. A flue gas which is produced after driving the turbine passes through the exhausted heat recovery boiler 5 so that thermal energy is collected from the flue gas, and steam is produced and is supplied to the steam turbine facility so as to drive the turbine. In this way, power generation is performed. Meanwhile, the flue gas from which the thermal energy is collected passes through the 10 gas purification device so that a harmful substance is removed from the flue gas, and is discharged to the atmosphere through a stack. [00041 By the way, the coal which is used in the integrated coal gasification combined cycle may be not only 15 coal of high quality (high-grade coal) such as bituminous coal or smokeless coal generating a large amount of heat, but also coal of low quality (low-grade coal) such as subbituminous coal or brown coal generating a comparatively low amount of heat. However, since the low-grade coal 20 carries a large amount of moisture therein, the power generation efficiency is degraded by the moisture. For this reason, in a case of the low-grade coal, there is a need to conduct a process in which the coal is dried by the above-described drying device so as to remove the moisture 25 therefrom, is milled, and then is supplied to the coal gasification furnace. [00051 As a drying device for drying the coal, a drying device disclosed in Patent Literature 1 below is known. In a coal drying and classifying device using a fluid bed 30 disclosed in Patent Literature 1, a dispersion plate is horizontally attached to a bottom inside a device body, the upper portion of the dispersion plate is equipped with a fluid bed, the lower portion of the dispersion plate is 3 equipped with a hot wind inlet, one end side of the device body is equipped with a coal supply unit, the other end side thereof is equipped with a dry coal discharge unit, the fluid bed is equipped with plural baffle plates, and a 5 freeboard thereabove is equipped with plural rectification plates. [00061 Further, in a case where an integrated coal gasification combined cycle uses brown coal (wet raw material) as fuel, the brown coal carries a large amount of 10 moisture into a gasification furnace. For this reason, the temperature inside the gasification furnace decreases due to the evaporation latent heat of the moisture, and hence the power generation efficiency is degraded. In order to use the coal with a large amount of moisture, a fluid bed 15 drying apparatus needs to be provided. Then, there is a need to perform a process in which the coal is dried by the fluid bed drying apparatus so as to remove the moisture thereof, is milled, and is supplied to the coal gasification furnace. As the fluid bed drying apparatus, a 20 fluid bed drying apparatus disclosed in Patent Literature 2 is known. Citation List Patent Literature [0007] Patent Literature 1: Japanese Laid-open Patent 25 Publication No. 11-083319 Patent Literature 2: Japanese Laid-open Patent Publication No. 2008-89243 [0007a] Any discussion of the prior art throughout the specification should in no way be considered as an 30 admission that such prior art is widely known or forms part of common general knowledge in the field. Summary Technical Problem 4 [0008] it is an object of the present invention to overcome or ameliorate at least one of the disadvantages of the prior art, or to provide a useful alternative. [0008a] As described above, since low-grade coal contains 5 a large amount of moisture compared to high-grade coal, there is a concern that poor fluidization occurs inside the drying device and the coal is not satisfactorily dried. For this reason, the amount of the input coal needs to be decreased, and hence a problem arises in that the 10 processing amount decreases. [0009] Further, the fluid bed drying apparatus discharges the fluidizing gas and the steam, produced when drying the wet raw material while supplying the fluidizing gas thereto, as the product steam to the outside of the 15 apparatus. The fluid bed drying facility with the fluid bed drying apparatus may improve the heat use efficiency or the air use efficiency of the apparatus by collecting the heat of the product steam or using the product steam as the fluidizing gas. However, a large amount of scattering dust 20 (dust) is mixed with the product steam. For this reason, there is a concern that a bad influence may occur in a device for collecting the latent heat of the large amount of dust mixed with the product steam or a device supplying the product steam as the fluidizing gas again. 25 [0010] The invention is made to solve the above described problems, and it is one object of a preferred embodiment of the invention to provide a fluid bed drying apparatus capable of improving drying efficiency and a fluid bed drying facility capable of efficiently removing 30 dust from product steam discharged from the fluid bed drying apparatus. Solution to Problem 5 [0009a] According to a first aspect the invention provides a fluid bed drying facility comprising: a fluid bed drying apparatus including a drying container (420), 5 an input unit for inputting a wet raw material to one end of the drying container, a discharge unit for discharging a dry material obtained by heating and drying the wet raw material from the other end of the drying 10 container, a gas dispersion plate (424) for defining a drying chamber used to dry the wet raw material input into the drying container and a chamber positioned below the drying chamber in the 15 vertical direction, the gas dispersion plate being equipped with a penetration hole capable of supplying a gas from the chamber into the drying chamber therethrough, a fluidizing gas supply unit for supplying a 20 fluidizing gas into the chamber, the fluidizing gas forming a fluid bed along with the wet raw material in the drying chamber, and a steam discharge unit (427) for discharging product steam produced by drying the wet raw 25 material of the fluid bed formed by the supply of the fluidizing gas from the upside of the drying container, the fluid bed drying apparatus being used to dry the wet raw material having a large moisture content inside the 30 drying container; a product steam line (Ll) for discharging the product steam discharged from the steam discharge unit of the fluid bed drying apparatus to the outside; 6 a cooling trap (403) provided in the course of the product steam line, for cooling the product steam so as to remove dust contained in the product steam; a cooler (410) for cooling a dry material obtained by 5 drying the wet raw material discharged from the discharge unit; and a first superheating unit (404) provided at the downstream side of the cooling trap (403) in the product steam line (Li), for guiding the cooled product steam to a 10 zone above the fluid bed in the vertical direction inside the drying container (420) so as to superheat the product steam by the product steam inside the drying container (420). [0009a] Unless the context clearly requires otherwise, 15 throughout the description and the claims, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is to say, in the sense of "including, but not limited to". 20 [0009b] Also described is a fluid bed drying apparatus comprising: a drying container formed in a hollow shape; a wet raw material input unit for inputting a wet raw 25 material to one end side of the drying container; a dry material discharge unit for discharging a dry material obtained by heating and drying the wet raw material from the other end side of the drying container; a fluidizing gas supply unit through for supplying a 30 fluidizing gas to a lower portion of the drying container so as to form a fluid bed along with the wet raw material; a gas discharge unit for discharging the fluidizing gas and product steam from the wet raw material input unit 6a at the upside of one end side of the drying container; a heating unit for heating the wet raw material of the fluid bed; and a guide device for guiding the fluidizing gas and the 5 product steam to flow from the dry material discharge unit toward the wet raw material input unit so as to guide the fluidizing gas and the product steam to the gas discharge 7 unit. [00101 Also described is a fluid bed drying facility comprising: a fluid bed drying apparatus including 5 a drying container, an input unit for inputting a wet raw material to one end of the drying container, a discharge unit for discharging a dry material obtained by heating and drying the wet raw material from 10 the other end of the drying container, a gas dispersion plate for defining a drying chamber used to dry the wet raw material input into the drying container and a chamber positioned below the drying chamber in the vertical direction, the gas dispersion plate 15 being equipped with a penetration hole capable of supplying a gas from the chamber into the drying chamber therethrough, a fluidizing gas supply unit for supplying a fluidizing gas into the chamber, the fluidizing gas forming a fluid bed along with the wet raw material in the drying 20 chamber, and a steam discharge unit for discharging product steam produced by drying the wet raw material of the fluid bed formed by the supply of the fluidizing gas from the upside of the drying container, 25 the fluid bed drying apparatus being used to dry the wet raw material having a large moisture content inside the drying container; a product steam line for discharging the product steam discharged from the steam discharge unit of the fluid bed 30 drying apparatus to the outside; a cooling trap provided in the course of the product steam line, for cooling the product steam so as to remove dust contained in the product steam; and 8 a cooler for cooling a dry material obtained by drying the wet raw material discharged from the discharge unit. [0011] Also described is a fluid bed drying apparatus characterized by comprising: a drying container formed in a 5 hollow shape; a wet raw material input unit for inputting a wet raw material to one end side of the drying container; a dry material discharge unit for discharging a dry material obtained by heating and drying the wet raw material from the other end side of the drying container; a fluidizing 10 gas supply unit through for supplying a fluidizing gas to a lower portion of the drying container so as to form a fluid bed along with the wet raw material; a gas discharge unit for discharging the fluidizing gas and product steam from the wet raw material input unit at the upside of one end 15 side of the drying container; a heating unit for heating the wet raw material of the fluid bed; and a guide device for guiding the fluidizing gas and the product steam to flow from the dry material discharge unit toward the wet raw material input unit so as to guide the fluidizing gas 20 and the product steam to the gas discharge unit. [0012] Accordingly, when the wet raw material is input from the wet raw material input unit into the drying container and the fluidizing gas is supplied from the fluidizing gas supply unit thereinto in the lower portion 25 of the drying container, the wet raw material is fluidized by the fluidizing gas so as to form the fluid bed. Then, the wet raw material of the fluid bed is heated and dried by the heating unit so as to become the dry material, the dry material is discharged from the dry material discharge 30 unit to the outside, and the steam which is produced by drying the wet raw material and the fluidizing gas are discharged from the gas discharge unit to the outside. At this time, the fluidizing gas and the product steam are 9 guided by the guide device to flow from the dry material discharge unit toward the wet raw material input unit so that the fluidizing gas and the product steam are guided to the gas discharge unit. Then, the particles of the dry 5 material obtained with the fluidizing gas and the product steam are returned toward the wet raw material input unit, are mixed with the wet raw material, and are dried by the fluid bed again. Thus, the heating and the drying of the wet raw material input from the wet raw material input unit 10 may be promoted, and hence the wet raw material drying efficiency may be improved. [0013] According to the fluid bed drying apparatus of the present invention, it is characterized that the guide device includes a collision plate provided in a freeboard 15 above the fluid bed, for collide the fluidizing gas and the product steam guided to flow from the dry material discharge unit toward the wet raw material input unit so as to separate particles of the dry material obtained with the fluidizing gas and the product steam. 20 [0014] Accordingly, the fluidizing gas and the product steam flow from the dry material discharge unit toward the wet raw material input unit by the collision plates, so that the fluidizing gas and the product steam may be appropriately guided to the gas discharge unit. Also, the 25 particles of the dry material obtained with the fluidizing gas and the product steam collide with the collision plates, so that the particles of the dry material of the fluidizing gas and the product steam are appropriately separated therefrom so as to fall to the fluid bed. As a result, the 30 dry material separating efficiency may be improved. [0015] According to the fluid bed drying apparatus of the present invention, it is characterized that a plurality of the collision plates are disposed in the flow direction 10 of the fluidizing gas and the product steam with a predetermined gap therebetween so as to face the flow direction, and a lower end of a collision plate group formed by the plurality of collision plates is disposed at 5 a position where the lower end is inclined upward from the wet raw material input unit toward the dry material discharge unit. [0016] Accordingly, since the lower end of the collision plate group formed by plural collision plates is disposed 10 at a position where the lower end is inclined upward from the wet raw material input unit toward the dry material discharge unit, the fluidizing gas and the product steam flow from the dry material discharge unit toward the wet raw material input unit, and hence the fluidizing gas and 15 the product steam may appropriately flow toward the gas discharge unit. [0017] According to the fluid bed drying apparatus of the present invention, it is characterized that the guide device includes an inclined plate which is provided in the 20 freeboard above the fluid bed and is inclined upward from the wet raw material input unit toward the dry material discharge unit. [0018] Accordingly, the fluidizing gas and the product steam flow toward the dry material discharge unit along the 25 lower surface of the inclined plate, and flow above the inclined plate toward the wet raw material input unit. Thus, the fluidizing gas and the product steam may be appropriately guided to flow from the dry material discharge unit toward the wet raw material input unit, so 30 that the fluidizing gas and the product steam may be appropriately guided to the gas discharge unit. Also, the particles of the dry material obtained with the fluidizing gas and the product steam fall to the inclined plate, so 11 that the particles of the dry material may be appropriately returned toward the wet raw material input unit along the upper surface of the inclined plate. [00191 According to the fluid bed drying apparatus of 5 the present invention, it is characterized that the fluid bed drying apparatus further including: a conveying device for conveying the particles of the dry material dropped onto the inclined plate by the plurality of collision plates toward the wet raw material input unit of the drying 10 container. [00201 Accordingly, when the fluidizing gas and the product steam flow above the inclined plate and collide with plural collision plates, the particles of the dry material obtained with the fluidizing gas and the product 15 steam are separated therefrom so as to fall onto the inclined plate. Then, the dry material is conveyed by the conveying device toward the wet raw material input unit of the drying container, so that the dry material may be appropriately mixed with the wet raw material. 20 [00211 According to the fluid bed drying apparatus of the present invention, it is characterized that the guide device includes a partition plate which is provided in the freeboard above the fluid bed so as to define the wet raw material input unit and the gas discharge unit. 25 [0022] Accordingly, since the wet raw material input unit and the gas discharge unit are defined by the partition plate, the fluidizing gas and the product steam guided to flow from the dry material discharge unit toward the wet raw material input unit are prevented from being 30 discharged from the wet raw material input unit to the outside, and hence the flow of the fluidizing gas and the product steam may be appropriately guided. [00231 According to a fluid bed drying apparatus of the 12 present invention, it is characterized by including: a fluid bed drying apparatus including a drying container, an input unit for inputting a wet raw material to one end of the drying container, a discharge unit for discharging a 5 dry material obtained by heating and drying the wet raw material from the other end of the drying container, a gas dispersion plate for defining a drying chamber used to dry the wet raw material input into the drying container and a chamber positioned below the drying chamber in the vertical 10 direction, the gas dispersion plate being equipped with a penetration hole capable of supplying a gas from the chamber into the drying chamber therethrough, a fluidizing gas supply unit for supplying a fluidizing gas into the chamber, the fluidizing gas forming a fluid bed along with 15 the wet raw material in the drying chamber, and a steam discharge unit for discharging product steam produced by drying the wet raw material of the fluid bed formed by the supply of the fluidizing gas from the upside of the drying container, the fluid bed drying apparatus being used to dry 20 the wet raw material having a large moisture content inside the drying container; a product steam line for discharging the product steam discharged from the steam discharge unit of the fluid bed drying apparatus to the outside; a cooling trap provided in the course of the product steam line, for 25 cooling the product steam so as to remove dust contained in the product steam; and a cooler for cooling a dry material obtained by drying the wet raw material discharged from the discharge unit. [0024] Since the fluid bed drying facility has the 30 above-described configuration, dust may be efficiently removed from the product steam discharged from the fluid bed drying apparatus. [00251 In this case, it is preferable that the fluid bed 13 drying apparatus further includes a heating unit including a pipe disposed inside the fluid bed of the drying container and a superheating medium supply device for supplying a superheating medium to the pipe. Accordingly, 5 the wet raw material may be further efficiently dried. [00261 In addition, it is preferable that the fluid bed drying apparatus further includes: a superheating unit provided at the downstream side of the cooling trap in the product steam line, for guiding the cooled product steam to 10 a zone above the fluid bed in the vertical direction inside the drying container so as to superheat the product steam by the product steam inside the drying container. Accordingly, since the temperature of the product steam passing through the cooling trap may be increased by using 15 the heat inside the apparatus, the product steam may be used for various purposes. [0027] In addition, it is preferable that the fluid bed drying apparatus further includes a superheating unit provided at the downstream side of the cooling trap in the 20 product steam line, for superheating the cooled product steam by the superheating medium flowing through the pipe of a zone passing through the fluid bed of the heating unit. Accordingly, since the temperature of the product steam passing through the cooling trap may be increased by using 25 the heat inside the apparatus, the product steam may be used for various purposes. [00281 In addition, it is preferable that the fluid bed drying apparatus further includes a branch line for bifurcating a part of the product steam heated by the 30 superheating unit so as to supply the product steam as the fluidizing gas to the fluidizing gas supply unit. Accordingly, the heat and the steam produced inside the apparatus may be efficiently used.

14 [00291 In addition, it is preferable that the fluid bed drying apparatus further includes a heat recovery system for bifurcating a part of the product steam heated by the superheating unit so as to collect the heat of the product 5 steam. Accordingly, the heat produced inside the apparatus may be efficiently used. Advantageous Effects of Invention [00301 According to the fluid bed drying apparatus of the invention, since the guide device is provided inside 10 the drying container so as to guide the fluidizing gas and the product steam to flow from the dry material discharge unit toward the wet raw material input unit so that the fluidizing gas and the product steam are guided to the gas discharge unit, the particles of the dry material obtained 15 with the fluidizing gas and the product steam may be returned toward the wet raw material input unit so as to be mixed with the wet raw material. Thus, since the heating and the drying of the wet raw material may be promoted, the wet raw material drying efficiency may be improved. 20 [00311 According to the fluid bed drying facility of the invention, there is an advantage that dust may be efficiently removed from the product steam discharged from the fluid bed drying apparatus. Brief Description of Drawings 25 [0032] FIG. 1 is a schematic configuration diagram illustrating an integrated coal gasification combined cycle that employs a fluid bed drying apparatus according to a first embodiment of the invention. FIG. 2 is a schematic side view illustrating the fluid 30 bed drying apparatus of the first embodiment. FIG. 3 is a schematic plan view illustrating the fluid bed drying apparatus of the first embodiment. FIG. 4 is a schematic side view illustrating a fluid 15 bed drying apparatus according to a second embodiment of the invention. FIG. 5 is a schematic side view illustrating a fluid bed drying apparatus according to a third embodiment of the 5 invention. FIG. 6 is a schematic side view illustrating a fluid bed drying apparatus according to a fourth embodiment of the invention. FIG. 7 is a schematic side view illustrating a fluid 10 bed drying apparatus according to a fifth embodiment of the invention. FIG. 8 is a schematic diagram illustrating an embodiment of an integrated coal gasification combined cycle that employs a fluid bed drying facility according to 15 a sixth embodiment of the invention. FIG. 9 is a schematic diagram illustrating the fluid bed drying facility that includes the fluid bed drying apparatus according to the sixth embodiment illustrated in FIG. 8. 20 FIG. 10 is a schematic diagram illustrating the fluid bed drying apparatus according to the sixth embodiment illustrated in FIG. 9. FIG. 11 is a schematic diagram illustrating a fluid bed drying facility that includes a fluid bed drying 25 apparatus according to a seventh embodiment. Description of Embodiments [0033] Hereinafter, preferred embodiments of a fluid bed drying apparatus and a fluid bed drying facility according to the invention will be described in detail by referring 30 to the accompanying drawings. Furthermore, the invention is not limited by the embodiments. Further, when there are plural embodiments, the respective embodiments may be combined with one another.

16 First Embodiment [0034] FIG. 1 is a schematic configuration diagram illustrating an integrated coal gasification combined cycle that employs a fluid bed drying apparatus according to a 5 first embodiment of the invention, FIG. 2 is a schematic side view illustrating the fluid bed drying apparatus of the first embodiment, and FIG. 3 is a schematic plan view illustrating the fluid bed drying apparatus of the first embodiment. 10 [0035] The Integrated Coal Gasification Combined Cycle (IGCC) of the first embodiment adopts an air combustion type in which a coal gas is produced inside a gasification furnace by using air as an oxidation agent and supplies the coal gas purified by a gas purification device as a fuel 15 gas to a gas turbine facility so as to generate power. That is, the integrated coal gasification combined cycle of the embodiment is a power generating facility of an air combustion (air blow) type. In this case, low-grade coal is used as a wet raw material supplied to the gasification 20 furnace. [00361 In the first embodiment, as illustrated in FIG. 1, an integrated coal gasification combined cycle 10 includes a coal supply device 11, a fluid bed drying apparatus 12, a coal pulverizer (mill) 13, a coal gasification furnace 14, 25 a char recovery unit 15, a gas purification device 16, a gas turbine facility 17, a steam turbine facility 18, a generator 19, and an exhausted heat recovery boiler (HRSG: Heat Recovery Steam Generator) 20. [0037] The coal supply device 11 includes a raw coal 30 bunker 21, a coal feeder 22, and a crusher 23. The raw coal bunker 21 may store low-grade coal, and inputs a predetermined amount of the low-grade coal into the coal feeder 22. The coal feeder 22 conveys the low-grade coal 17 input from the raw coal bunker 21 by a conveyor or the like, and inputs the low-grade coal into the crusher 23. The crusher 23 may crush the input low-grade coal into a predetermined size. 5 [0038] The fluid bed drying apparatus 12 is used to heat and dry the low-grade coal in a fluidized state by supplying drying steam (superheated steam) to the low-grade coal input by the coal supply device 11, and may remove moisture contained in the low-grade coal. Then, the fluid 10 bed drying apparatus 12 is equipped with a cooler 31 which cools the low-grade coal of the drying agent extracted from the lower portion thereof, and the dry coal of the drying and cooling agent is stored in a dry coal bunker 32. Further, the fluid bed drying apparatus 12 is equipped with 15 a dry coal cyclone 33 which separates the particles of the dry coal from the steam extracted from the upper portion thereof and an electronic dry coal precipitator 34, and the particles of the dry coal separated from the steam are stored in the dry coal bunker 32. Furthermore, the steam 20 from which the dry coal is separated by the electronic dry coal precipitator 34 is compressed by a steam compressor 35, and is supplied as drying steam to the fluid bed drying apparatus 12. [00391 The coal pulverizer 13 is a coal mill, and 25 produces pulverized coal by milling the low-grade coal (the dry coal) dried by the fluid bed drying apparatus 12 into fine particles. That is, when the dry coal stored in the dry coal bunker 32 is input to the coal pulverizer 13 by a coal feeder 36, the coal pulverizer mills the dry coal into 30 pulverized coal having a predetermined particle diameter or less. Then, the pulverized coal which is milled by the coal pulverizer 13 is separated from the carrier gas by pulverized coal bag filters 37a and 37b and is stored in 18 pulverized coal supply hoppers 38a and 38b. [0040] To the coal gasification furnace 14, the pulverized coal which is processed by the coal pulverizer 13 is supplied and char (the unburned portion of coal) 5 which is collected by the char recovery unit 15 is supplied. [0041] That is, the coal gasification furnace 14 is connected with a compressed air supply line 41 from the gas turbine facility 17 (compressor 61) so that the air compressed by the gas turbine facility 17 may be supplied 10 thereto. An air separating device 42 is used to produce separate nitrogen and oxygen from the air in the atmosphere, a first nitrogen supply line 43 is connected to the coal gasification furnace 14, and the first nitrogen supply line 43 is connected with coal supply lines 44a and 44b from the 15 pulverized coal supply hoppers 38a and 38b. Further, a second nitrogen supply line 45 is also connected to the coal gasification furnace 14, and the second nitrogen supply line 45 is connected with a char return line 46 from the char recovery unit 15. Further, an oxygen supply line 20 47 is connected to the compressed air supply line 41. In this case, the nitrogen is used as a carrier gas for the coal and the char, and the oxygen is used as an oxidation agent. [0042] The coal gasification furnace 14 is, for example, 25 an entrained bed gasification furnace, and is used to burn and gasify the coal, the char, the air (the oxygen), or the moisture vapor as the gasifying agent supplied thereinto and generates a combustible gas (a product gas and a coal gas) mainly including carbon dioxide, so that a 30 gasification reaction occurs using the combustible gas as a gasifying agent. Furthermore, the coal gasification furnace 14 is equipped with a foreign matter removing device 48 which removes foreign matter mixed with the 19 pulverized coal. In this case, the coal gasification furnace 14 is not limited to the entrained bed gasification furnace, and may be also a fluid bed gasification furnace or a fixed bed gasification furnace. Then, in the coal 5 gasification furnace 14, a combustible gas generation line 49 is installed toward the char recovery unit 15, so that the combustible gas including the char may be discharged therethrough. In this case, the gas generation line 49 may be equipped with a gas cooler, and the combustible gas may 10 be cooled to a predetermined temperature and be supplied to the char recovery unit 15. [0043] The char recovery unit 15 includes a precipitator 51 and a supply hopper 52. In this case, the precipitator 51 includes one or plural bag filters or cyclones, and 15 hence may separate the char included in the combustible gas produced by the coal gasification furnace 14. Then, the combustible gas from which the char is separated is sent to the gas purification device 16 through a gas discharge line 53. The supply hopper 52 is used to store the fine char 20 separated from the combustible gas in the precipitator 51. Furthermore, a bin may be disposed between the precipitator 51 and the supply hopper 52 and a plurality of the supply hoppers 52 may be connected to the bin. Then, the char return line 46 from the supply hopper 52 is connected to 25 the second nitrogen supply line 45. [0044] The gas purification device 16 performs gas purification on the combustible gas from which the char is separated by the char recovery unit 15 by removing impurities such as a sulfur compound or a nitrogen compound. 30 Then, the gas purification device 16 produces a fuel gas by purifies the combustible gas and supplies the result to the gas turbine facility 17. Furthermore, in the gas purification device 16, since a sulfur content (H 2 S) is 20 still included in the combustible gas from which the char is separated, the sulfur content is collected as gypsum by the removal using amine absorbent and is effectively used. [00451 The gas turbine facility 17 includes the 5 compressor 61, a combustor 62, and a turbine 63, and the compressor 61 and the turbine 63 are connected to each other by a rotary shaft 64. The combustor 62 is connected with a compressed air supply line 65 from the compressor 61, and is connected with a fuel gas supply line 66 from the 10 gas purification device 16, so that the turbine 63 is connected with a combustion gas supply line 67. Further, the gas turbine facility 17 is equipped with the compressed air supply line 41 which extends from the compressor 61 to the coal gasification furnace 14, and a booster 68 is 15 provided in the course of the compressed air supply line. Accordingly, in the combustor 62, the compressed air supplied from the compressor'61 is mixed with the fuel gas supplied from the gas purification device 16 and is burned. Thus, in the turbine 63, the generator 19 may be driven by 20 rotating the rotary shaft 64 by the produced combustion gas. [00461 The steam turbine facility 18 includes a turbine 69 which is connected to the rotary shaft 64 in the gas turbine facility 17, and the generator 19 is connected to the base end of the rotary shaft 64. The exhausted heat 25 recovery boiler 20 is provided in a flue gas line 70 from the gas turbine facility 17 (the turbine 63), and is used to produce steam by the heat exchange between air and the high-temperature flue gas. For this reason, a steam supply line 71 and a steam recovery line 72 are provided between 30 the exhausted heat recovery boiler 20 and the turbine 69 of the steam turbine facility 18, and a condenser 73 is provided in the steam recovery line 72. Accordingly, in the steam turbine facility 18, the turbine 69 is driven by 21 the steam supplied from the exhausted heat recovery boiler 20, and the generator 19 may be driven by the rotation of the rotary shaft 64. [00471 Then, the flue gas of which the heat is collected 5 in the exhausted heat recovery boiler 20 passes through a gas purification device 74 so as to remove a toxic material therefrom, and the purified flue gas is discharged from a stack 75 to the atmosphere. [0048] Here, the operation of the integrated coal 10 gasification combined cycle 10 of the first embodiment will be described. [0049] According to the integrated coal gasification combined cycle 10 of the first embodiment, in the coal supply device 11, the raw coal (low-grade coal) is stored 15 in the raw coal bunker 21, and the low-grade coal of the raw coal bunker 21 is input to the crusher 23 by the coal feeder 22 so that the low-grade coal is milled into a predetermined size. Then, the milled low-grade coal is heated and dried by the fluid bed drying apparatus 12, is 20 cooled by the cooler 31, and is stored in the dry coal bunker 32. Further, the steam which is extracted from the fluid bed drying apparatus 12 passes through the dry coal cyclone 33 and the electronic dry coal precipitator 34 so that the particles of the dry coal-are separated. Then, 25 the result is compressed by the steam compressor 35 and is returned as drying steam to the fluid bed drying apparatus 12. Meanwhile, the particles of the dry coal separated from the steam are stored in the dry coal bunker 32. [0050] The dry coal which is stored in the dry coal 30 bunker 32 is input to the coal pulverizer 13 by the coal feeder 36. Here, the dry coal is milled into fine particles to thereby produce the pulverized coal, and is stored in the pulverized coal supply hoppers 38a and 38b 22 through the pulverized coal bag filters 37a and 37b. The pulverized coal which is stored in the pulverized coal supply hoppers 38a and 38b is supplied to the coal gasification furnace 14 through the first nitrogen supply 5 line 43 by the nitrogen supplied from the air separating device 42. Further, the char which is collected by the char recovery unit 15 to be described later is supplied to the coal gasification furnace 14 through the second nitrogen supply line 45 by the nitrogen supplied from the 10 air separating device 42. Further, the compressed air which is extracted from the gas turbine facility 17 to be described later is boosted by the booster 68, and is supplied to the coal gasification furnace 14 through the compressed air supply line 41 along with the oxygen 15 supplied from the air separating device 42. [0051] In the coal gasification furnace 14, the supplied pulverized coal and char are burned by the compressed air (the oxygen), and the pulverized coal and the char are gasified, thereby producing the combustible gas (the coal 20 gas) mainly including carbon dioxide. Then, the combustible gas is discharged from the coal gasification furnace 14 through the gas generation line 49 and is sent to the char recovery unit 15. [0052] In the char recovery unit 15, the combustible gas 25 is first supplied to the precipitator 51, and the precipitator 51 separates the char included in the combustible gas. Then, the combustible gas from which the char is separated is sent to the gas purification device 16 through the gas discharge line 53. Meanwhile, the fine 30 char which is separated from the combustible gas is deposited on the supply hopper 52, and is returned to the coal gasification furnace 14 through the char return line 46 so as to be recovered.

23 [0053] The combustible gas from which the char is separated by the char recovery unit 15 passes through the gas purification device 16 so that impurities such as a sulfur compound or a nitrogen compound are removed and the 5 gas is purified, thereby producing a fuel gas. Then, in the gas turbine facility 17, when the compressor 61 produces the compressed air and supplies the compressed air to the combustor 62, the combustor 62 mixes the compressed air supplied from the compressor 61 with the fuel gas 10 supplied from the gas purification device 16 and burns the mixed result to thereby produce a combustion gas. Then, the turbine 63 is driven by the combustion gas, and the generator 19 is driven through the rotary shaft 64, thereby generating power. 15 [00541 Then, the flue gas which is discharged from the turbine 63 in the gas turbine facility 17 exchanges heat with air in the exhausted heat recovery boiler 20 so as to produce steam, and the produced steam is supplied to the steam turbine facility 18. In the steam turbine facility 20 18, the turbine 69 is driven by the steam supplied from the exhausted heat recovery boiler 20, and hence power may be generated by driving the generator 19 through the rotary shaft 64. [0055] Subsequently, in the gas purification device 74, 25 the flue gas which is purified by removing the toxic material of the flue gas discharged from the exhausted heat recovery boiler 20 is discharged to the atmosphere from the stack 75. [0056] Hereinafter, the fluid bed drying apparatus 12 of 30 the integrated coal gasification combined cycle 10 will be described in detail. [0057] As illustrated in FIGS. 2 and 3, the fluid bed drying apparatus 12 includes a drying container 101, a raw 24 coal input port (wet raw material input unit) 102, a dry coal discharge port (dry material discharge unit) 103, a fluidizing gas supply unit 104, a gas discharge port (gas discharge unit) 105, and a heat transfer pipe (heating 5 unit) 106. [0058] The drying container 101 is formed in a hollow box shape, where one end side thereof is equipped with the raw coal input port 102 for inputting the raw coal and the other end side thereof is equipped with the dry coal 10 discharge port 103 for discharging the dry material used to heat and dry the raw coal. Further, the lower portion of the drying container 101 is equipped with a dispersion plate 107 having plural openings and separated from a bottom plate 101a by a predetermined distance, and the 15 bottom plate 101a is equipped with the fluidizing gas supply port 104 that supplies the fluidizing gas (superheated steam) into the drying container 101 therethrough. Moreover, the upper portion of the drying container 101 is equipped with the gas discharge port 105 20 which discharges the fluidizing gas and the product steam therethrough. In this case, the drying container 101 has a configuration in which a ceiling portion 101b is inclined upward toward the gas discharge port 105 and the fluidizing gas and the product steam flow along the inclined ceiling 25 portion 101b so as to be guided to the gas discharge port 105 without staying at a certain portion. [0059] Since the raw coal is supplied from the raw coal input port 102 into the drying container 101 and the fluidizing gas is supplied from the fluidizing gas supply 30 unit 104 thereinto through the dispersion plate 107, a fluid bed S with a predetermined thickness is formed above the dispersion plate 107, and a freeboard F is formed above the fluid bed S. Then, the heat transfer pipe 106 is 25 disposed so as to penetrate the drying container 101 from the outside and to circulate inside the fluid bed S, and the raw coal may be heated and dried by the superheated steam flowing through the heat transfer pipe 106. 5 [00601 Further, in the drying container 101, the fluidizing gas is supplied from the fluidizing gas supply port 104 to the fluid bed S through the dispersion plate 107 and the raw coal of the fluid bed S is dried so that the moisture contained in the raw coal evaporates so as to 10 produce the steam. The fluidizing gas and the product steam are discharged from the gas discharge port 105. However, in the embodiment, an inclined plate (guide plate) 111, collision plates 112, and a flow guiding plate (partition plate) 113 are provided as a guide device that 15 guides the flow of the fluidizing gas and the product steam from the dry coal discharge port 103 to the raw coal input port 102 so that the fluidizing gas and the product steam are guided to the gas discharge port 105. [0061] The inclined plate 111 is disposed at the 20 freeboard F above the fluid bed S so as to be inclined upward from the raw coal input port 102 toward the dry coal discharge port 103, the base end thereof is disposed with a predetermined gap between the base end and the wall surface near the raw coal input port 102 of the drying container 25 101, the front end thereof is disposed with a predetermined gap between the front end and the wall surface near the dry coal discharge port 103 of the drying container 101, and both side portions thereof are fixed to the respective wall surfaces of the drying container 101 in a close contact 30 state without a gap therebetween. For this reason, the gap which is formed between the inclined plate 111 and the upper surface of the fluid bed S is set so that the gap gradually increases from the raw coal input port 102 toward 26 the dry coal discharge port 103, so that the fluidizing gas and the product steam may be guided toward the dry coal discharge port 103 and may be guided from the dry coal discharge port 103 toward the raw coal input port 102. 5 [0062] The collision plates 112 are used to separate the particles of the dry material obtained with the fluidizing gas and the product steam in a manner such that the fluidizing gas and the product steam guided to flow from the dry coal discharge port 103 toward the raw coal input 10 port 102 collides with the collision plate above the inclined plate 111 at the freeboard F. For this reason, plural collision plates 112 are provided between the ceiling portion 101b of the drying container 101 and the inclined plate 111 at the freeboard F. The plural 15 collision plates 112 are substantially disposed in the vertical direction so as to face the flow of the fluidizing gas and the product steam flowing from the dry coal discharge port 103 toward the raw coal input port 102, and the collision plates 112 are disposed with a predetermined 20 gap therebetween, thereby ensuring a passage in which the fluidizing gas and the product steam flow in a meandering manner. [0063] Further, the raw coal input port 102 and the gas discharge port 105 are disposed at one end side of the 25 drying container 101, and the gas discharge port 105 is disposed above the raw coal input port 102. Then, the flow guiding plate 113 is disposed so as to define the raw coal input port 102 and the gas discharge port 105. That is, the flow guiding plate 113 is disposed at the freeboard F 30 above the fluid bed S so as to be inclined downward from the raw coal input port 102 toward the dry coal discharge port 103, the base end thereof is disposed with a predetermined gap between the base end and the wall surface 27 near the raw coal input port 102 of the drying container 101, the front end thereof is disposed with a predetermined gap between the front end and the base end of the inclined plate 111, and both side portions thereof are fixed to the 5 respective wall surfaces of the drying container 101 in a close contact state without a gap therebetween. In this case, since the inclination angle of the flow guiding plate 113 is substantially equal to the raw coal input angle at the raw coal input port 102. For this reason, the gap 10 which is formed between the flow guiding plate 113 and the upper surface of the fluid bed S is set so that the gap gradually decreases from the raw coal input port 102 toward the inclined plate 111 (the dry coal discharge port 103). [0064] Here, the operation of the fluid bed drying 15 apparatus 12 of the first embodiment will be described. [0065] In the fluid bed drying apparatus 12, since the raw coal is supplied from the raw coal input port 102 into the drying container 101 and the fluidizing gas is supplied from the fluidizing gas supply port 104 thereinto through 20 the dispersion plate 107, a fluid bed S having a predetermined thickness is formed above the dispersion plate 107. The raw coal is moved in the fluid bed S by the fluidizing gas toward the dry coal discharge port 103. At this time, the raw coal is heated and dried by the heat 25 from the heat transfer pipe 106. In this case, the raw coal is heated and dried by the heat from the heat transfer pipe 106 while being moved from the raw coal input port 102 to the dry coal discharge port 103. However, the raw coal immediately after input from the raw coal input port 102, 30 that is, positioned below the flow guiding plate 113 becomes a preheated state, so that the moisture substantially does not evaporate. Subsequently, when the raw coal moves to the lower position of the inclined plate 28 111 over the preheating zone, that is, the lower position of the flow guiding plate 113, the evaporation of the moisture starts and gradually increases to the maximal state. Then, the evaporation of the moisture decreases as 5 it approaches the dry coal discharge port 103. [0066] Then, the steam which is produced by heating and drying the raw coal at the fluid bed S below the inclined plate 111 rises along with the fluidizing gas and flows along the lower surface of the inclined plate 111 toward 10 the dry coal discharge port 103. Then, the fluidizing gas and the product steam bypass the wall surface near the dry coal discharge port 103 of the drying container 101, and flow toward the raw coal input port 102 in the space above the inclined plate 111. At this time, the fluidizing gas 15 and the product steam collide with plural collision plates 112, so that particles of the dry coal obtained with the fluidizing gas and the product steam are separated so as to fall onto the inclined plate 111. Then, the particles of the dry coal fall toward the raw coal input port 102 along 20 the upper surface of the inclined plate 111, and fall to the fluid bed S along with the raw coal which is input from the raw coal input port 102 and is not dried yet. Here, the particles of the dry coal and the raw coal which is not dried yet are mixed with each other at the fluid bed S, so 25 that the drying of the raw coal which is not dried yet is promoted. Subsequently, the dry coal obtained by drying the raw coal is discharged from the dry coal discharge port 103 to the outside, and the fluidizing gas and the product steam from which the particles of the dry coal are 30 separated are guided to the flow guiding plate 113 and flow thereabove so as to be discharged from the gas discharge port 105 to the outside. [00671 In this way, the fluid bed drying apparatus of 29 the first embodiment includes the drying container 101 which is formed in a hollow shape, the raw coal input port 102 which inputs the raw coal to one end side of the drying container 101 therethrough, the dry coal discharge port 103 5 which discharges the dry coal obtained by heating and drying the raw coal from the other end side of the drying container 101 therethrough, the fluidizing gas supply port 104 which supplies the fluidizing gas to the lower portion of the drying container 101 so as to form the fluid bed S 10 along with the raw coal, the gas discharge port 105 which discharges the fluidizing gas and the product steam from the upside of the raw coal input port 102 at one end side of the drying container 101 therethrough, the heat transfer pipe 106 which heats the raw coal of the fluid bed S, and 15 the inclined plate 111 which is provided as the guide device for causing the fluidizing gas and the product steam to flow from the dry coal discharge port 103 toward the raw coal input port 102 so that the fluidizing gas and the product steam are guided to the gas discharge port 105. 20 [00681 Accordingly, when the raw coal is input from the raw coal input port 102 into the drying container 101 and the fluidizing gas is supplied from the fluidizing gas supply port 104 through the dispersion plate 107 in a direction from the lower portion of the drying container 25 101, the raw coal is fluidized by the fluidizing gas so as to form the fluid bed S. When the raw coal of the fluid bed S is moved by the fluidizing gas, the raw coal is heated and dried by the heat transfer pipe 106 so as to become the dry coal. Then, the dry coal is discharged from 30 the dry coal discharge port 103 to the outside, and the steam which is produced by drying the raw coal and the fluidizing gas are discharged from the gas discharge port 105 to the outside. At this time, the fluidizing gas and 30 the product steam flow by the inclined plate 111 from the dry coal discharge port 103 toward the raw coal input port 102 so as to be guided to the gas discharge port 105. Then, the particles of the dry coal obtained with the fluidizing 5 gas and the product steam are separated from the fluidizing gas and the product steam, are returned toward the raw coal input port 102, are mixed with the raw coal which is not dried yet, and are moved again in the fluid bed S. Thus, the heating and the drying of the raw coal input from the 10 raw coal input port 102 may be promoted, and hence the raw coal drying efficiency may be improved. [0069] Further, in the fluid bed drying apparatus of the first embodiment, the freeboard F above the fluid bed S is equipped with the inclined plate 111 which is inclined 15 upward from the raw coal input port 102 toward the dry coal discharge port 103. Accordingly, the fluidizing gas and the product steam flow toward the dry coal discharge port 103 along the lower surface of the inclined plate 111. Subsequently, the fluidizing gas and the product steam flow 20 toward the raw coal input port 102 above the inclined plate 111. Accordingly, the fluidizing gas and the product steam may be caused to flow from the dry coal discharge port 103 toward the raw coal input port 102 so as to be appropriately guided to the gas discharge port 105, and the 25 particles of the dry coal obtained with the fluidizing gas and the product steam may be caused to fall onto the inclined plate 111 so that the particles of the dry coal are appropriately returned toward the raw coal input port 102 along the upper surface of the inclined plate 111. 30 [0070] Further, in the fluid bed drying apparatus of the first embodiment, plural collision plates 112 are provided above the inclined plate 111 so as to separate the particles of the dry coal obtained with the fluidizing gas 31 and the product steam guided to flow from the dry coal discharge port 103 toward the raw coal input port 102. Accordingly, when the fluidizing gas and the product steam flow above the inclined plate 111 from the dry coal 5 discharge port 103 toward the raw coal input port 102, the fluidizing gas and the product steam collide with plural collision plates 112, so that the particles of the dry coal thereof are appropriately separated therefrom so as to fall. Thus, the dry coal separating performance may be improved. 10 [0071] In this case, since plural collision plates 112 are provided inside the drying container 101 so as to separate the particles of the dry coal from the fluidizing gas and the product steam, there is no need to provide a precipitator or the like outside the drying container 101 15 or it is possible to realize a decrease in size or the simplification of the device in accordance with a decrease in load. As a result, the pressure loss of the system is reduced, and hence the amount of heat collected from the product steam may be increased. Then, it is possible to 20 prevent the dew condensation which may occur when the particles of the dry coal are separated from the fluidizing gas and the product steam outside the drying container 101. [0072] Further, in the fluid bed drying apparatus of the first embodiment, the flow guiding plate 113 is disposed in 25 the freeboard F above the fluid bed S so as to define the raw coal input port 102 and the gas discharge port 105. Accordingly, since the raw coal input port 102 and the gas discharge port 105 are defined by the flow guiding plate 113, it is possible to prevent the fluidizing gas and the 30 product steam guided to flow from the dry coal discharge port 103 toward the raw coal input port 102 from being discharged from the raw coal input port 102 to the outside, and hence to appropriately guide the flow of the fluidizing 32 gas and the product steam. [0073] In this case, the flow guiding plate 113 is inclined downward from the raw coal input port 102 toward the dry coal discharge port 103, the base end thereof is 5 disposed with a predetermined gap between the base end and the wall surface near the raw coal input port 102 of the drying container 101, and the front end thereof is disposed with a predetermined gap between the front end and the base end of the inclined plate 111. Accordingly, the fluidizing 10 gas and the product steam which are guided to flow toward the raw coal input port 102 are appropriately guided toward the gas discharge port 105 by the inclined flow guiding plate 113. Further, the particles of the dry coal separated from the fluidizing gas and the product steam 15 fall onto the inclined plate 111 in a sliding manner, and are input again to the preheating zone of the fluid bed S from the gap between the inclined plate 111 and the flow guiding plate 113, so that the drying of the undried raw coal may be promoted. Moreover, since a gap is formed 20 between the flow guiding plate 113 and the wall surface of the drying container 101, it is possible to prevent the fluidizing gas and the product steam from staying between the flow guiding plate 113 and the wall surface of the drying container 101. 25 Second Embodiment [0074] FIG. 4 is a schematic side view illustrating a fluid bed drying apparatus according to a second embodiment of the invention. Furthermore, the same reference sign will be given to the same component as that of the above 30 described embodiment, and the detailed description thereof will not be repeated. [00751 In the second embodiment, as illustrated in FIG. 4, the fluid bed drying apparatus 12 includes the drying 33 container 101, the raw coal input port 102, the dry coal discharge port 103, the fluidizing gas supply port 104, the gas discharge port 105, and the heat transfer pipe 106. [00761 Further, the drying container 101 includes an 5 inclined belt 121, the collision plates 112, and the flow guiding plate 113 as the guide device which guides the fluidizing gas and the product steam from the dry coal discharge port 103 toward the raw coal input port 102 so that the fluidizing gas and the product steam are guided to 10 the gas discharge port 105. Then, the inclined belt 121 is formed as an endless conveyor belt suspended between a driving roller and a driven roller so as to be wound thereon, and serves as not only an inclined plate but also a conveying device for guiding the particles of the dry 15 coal dropped by plural collision plates 112 toward the raw coal input port 102. For this reason, the gap formed between the inclined belt 121 and the upper surface of the fluid bed S is set so that the gap gradually increases from the raw coal input port 102 toward the dry coal discharge 20 port 103. Accordingly, the fluidizing gas and the product steam may be guided toward the dry coal discharge port 103 and may be guided from the dry coal discharge port 103 toward the raw coal input port 102. [0077] The inclined belt 121 is disposed in the 25 freeboard F above the fluid bed S so as to be inclined upward from the raw coal input port 102 toward the dry coal discharge port 103, the base end thereof is disposed with a predetermined gap between the base end and the front end of the flow guiding plate 113, and the front end thereof is 30 disposed with a predetermined gap between the front end and the wall surface near the dry coal discharge port 103 of the drying container 101. Then, the driving roller and the driven roller are rotatably supported by the respective 34 wall surfaces of the drying container 101. For this reason, the inclined belt 121 may convey the particles of the dry coal falling onto the upper surface thereof toward the raw coal input port 102 in a manner such that the inclined belt 5 is operated in a direction indicated by the arrow of FIG. 4. [0078] Accordingly, since the raw coal is supplied from the raw coal input port 102 into the drying container 101 and the fluidizing gas is supplied from the fluidizing gas supply port 104 thereinto through the dispersion plate 107, 10 the fluid bed S having a predetermined thickness is formed above the dispersion plate 107. The raw coal is moved in the fluid bed S by the fluidizing gas toward the dry coal discharge port 103. At this time, the raw coal is heated and dried by the heat of the heat transfer pipe 106. In 15 this case, the raw coal is heated and dried by the heat from the heat transfer pipe 106 while being moved from the raw coal input port 102 toward the dry coal discharge port 103. However, the raw coal immediately after input from the raw coal input port 102, that is, positioned below the 20 flow guiding plate 113 becomes a preheated state, so that the moisture thereof substantially does not evaporate. Subsequently, when the raw coal moves to the lower position of the inclined belt 121 over the preheating zone, that is, the lower position of the flow guiding plate 113, the 25 evaporation of the moisture starts and gradually increases to the maximal state. Then, the evaporation of the moisture decreases as it approaches the dry coal discharge port 103. [0079] Then, the steam which is produced by heating and 30 drying the raw coal at the fluid bed S below the inclined belt 121 rises along with the fluidizing gas and flows toward the dry coal discharge port 103 along the lower surface of the inclined belt 121. Then, the fluidizing gas 35 and the product steam bypass the wall surface near the dry coal discharge port 103 of the drying container 101, and flow toward the raw coal input port 102 in the space above the inclined belt 121. At this time, the fluidizing gas 5 and the product steam collide with plural collision plates 112, so that the particles of the dry coal obtained with the fluidizing gas and the product steam are separated so as to fall onto the inclined belt 121. Then, the particles of the dry coal are moved toward the raw coal input port 10 102 by the driven inclined belt 121, and fall to the fluid bed S along with the raw coal which is before input from the raw coal input port 102 and is not dried yet. Here, the particles of the dry coal and the raw coal which is not dried yet are mixed with each other at the fluid bed S, so 15 that the drying of the raw coal which is not dried yet is promoted. Subsequently, the dry coal obtained by drying the raw coal is discharged from the dry coal discharge port 103 to the outside, and the fluidizing gas and the product steam from which the particles of the dry coal are 20 separated are guided to the flow guiding plate 113 and flow thereabove so as to be discharged from the gas discharge port 105 to the outside. [0080] In this way, in the fluid bed drying apparatus of the second embodiment, the inclined belt 121 is provided 25 inside the drying container 101 so that the inclined belt serves as the guide device which guides the fluidizing gas and the product steam to flow from the dry coal discharge port 103 toward the raw coal input port 102 so that the fluidizing gas and the product steam are guided to the gas 30 discharge port 105 and serves as the conveying device which conveys the particles of the dry coal falling thereon toward the raw coal input port 102. [0081] Accordingly, the fluidizing gas and the product 36 steam rising from the fluid bed S are guided to flow from the dry coal discharge port 103 toward the raw coal input port 102 by the inclined belt 121 so that the fluidizing gas and the product steam are guided to the gas discharge 5 port 105. Then, the particles of the dry coal obtained with the fluidizing gas and the product steam are separated from the fluidizing gas and the product steam, are returned toward the raw coal input port 102, are mixed with the raw coal which is not dried yet, and are moved again in the 10 fluid bed S. Thus, the heating and the drying of the raw coal input from the raw coal input port 102 may be promoted, and hence the raw coal drying efficiency may be improved. [0082] Further, when the fluidizing gas and the product steam flow above the inclined belt 121 so as to collide 15 with plural collision plates 112, the particles of the dry coal thereof are separated so as to fall onto the inclined belt 121. Then, the dry coal is conveyed toward -the raw coal input port 102 by the driven inclined belt 121, and is input to the preheating zone of the fluid bed S. Thus, the 20 dry coal may be appropriately mixed with the raw coal which is not dried yet, so that the drying of the raw coal may be promoted. Third Embodiment [00831 FIG. 5 is a schematic side view illustrating a 25 fluid bed drying apparatus according to a third embodiment of the invention. Furthermore, the same reference sign will be given to the same component as that of the above described embodiment, and the detailed description thereof will not be repeated. 30 [00841 In the third embodiment, as illustrated in FIG. 5, the fluid bed drying apparatus 12 includes the drying container 101, the raw coal input port 102, the dry coal discharge port 103, the fluidizing gas supply port 104, the 37 gas discharge port 105, and the heat transfer pipe 106. [0085] Further, the drying container 101 includes an inclined head 131, the collision plates 112, and the flow guiding plate 113 as the guide device which guides the 5 fluidizing gas and the product steam to flow from the dry coal discharge port 103 toward the raw coal input port 102 so that the fluidizing gas and the product steam are guided to the gas discharge port 105. Then, the inclined head 131 is formed in a hollow shape so that superheated steam may 10 be supplied thereinto and the upper surface thereof is equipped with plural ejection nozzles 131a. Accordingly, the inclined head serves as not only the inclined plate but also the conveying device which conveys the particles of the dry coal dropped by plural collision plates 112 toward 15 the raw coal input port 102. For this reason, the gap formed between the inclined head 131 and the upper surface of the fluid bed S is set so that the gap gradually increases from the raw coal input port 102 toward the dry coal discharge port 103. Thus, the fluidizing gas and the 20 product steam may be guided toward the dry coal discharge port 103 and may be guided from the dry coal discharge port 103 toward the raw coal input port 102. [0086] Further, the inclined head 131 is disposed in the freeboard F above the fluid bed S so as to be inclined 25 upward from the raw coal input port 102 toward the dry coal discharge port 103, the base end thereof is disposed with a predetermined gap between the base end and the front end of the flow guiding plate 113, the front end thereof is disposed with a predetermined gap between the front end and 30 the wall surface near the dry coal discharge port 103 of the drying container 101, and both side portions are fixed to the respective wall surfaces of the drying container 101. Then, the respective ejection nozzles 131a of the inclined 38 head 131 may eject the superheated steam toward the raw coal input port 102. For this reason, the inclined head 131 may convey the particles of the dry coal falling onto the upper surface thereof toward the raw coal input port 5 102 in a manner such that the superheated steam is ejected from the respective ejection nozzles 131a in a direction indicated by the arrow of FIG. 5. [00871 Accordingly, since the raw coal is supplied from the raw coal input port 102 into the drying container 101 10 and the fluidizing gas is supplied from the fluidizing gas supply port 104 thereinto through the dispersion plate 107, the fluid bed S having a predetermined thickness is formed above the dispersion plate 107. The raw coal is moved in the fluid bed S by the fluidizing gas toward the dry coal 15 discharge port 103. At this time, the raw coal is heated and dried by the heat of the heat transfer pipe 106. In this case, the raw coal is heated and dried by the heat from the heat transfer pipe 106 while being moved from the raw coal input port 102 toward the dry coal discharge port 20 103. However, the raw coal immediately after input from the raw coal input port 102, that is, positioned below the flow guiding plate 113 becomes a preheated state, so that the moisture thereof substantially does not evaporate. Subsequently, when the raw coal moves to the lower position 25 of the inclined head 131 over the preheating zone, that is, the lower position of the flow guiding plate 113, the evaporation of the moisture starts and gradually increases to the maximal state. Then, the evaporation of the moisture decreases as it approaches the dry coal discharge 30 port 103. [00881 Then, the steam which is produced by heating and drying the raw coal at the fluid bed S below the inclined head 131 rises along with the fluidizing gas and flows 39 toward the dry coal discharge port 103 along the lower surface of the inclined head 131. Then, the fluidizing gas and the product steam bypass the wall surface near the dry coal discharge port 103 of the drying container 101, and 5 flow toward the raw coal input port 102 in the space above the inclined head 131. At this time, the fluidizing gas and the product steam collide with plural collision plates 112, so that the particles of the dry coal obtained with the fluidizing gas and the product steam are separated so 10 as to fall onto the inclined head 131. Then, the particles of the dry coal are blown toward the raw coal input port 102 by the superheated steam ejected from the respective ejection nozzles 131a, so that the particles of the dry coal fall to the fluid bed S along with the raw coal which 15 is input from the raw coal input port 102 and is not dried yet. Here, the particles of the dry coal and the raw coal which is not dried yet are mixed with each other at the fluid bed S, so that the drying of the raw coal which is not dried yet is promoted. Subsequently, the dry coal 20 obtained by drying the raw coal is discharged from the dry coal discharge port 103 to the outside, and the fluidizing gas and the product steam from which the particles of the dry coal are separated are guided to the flow guiding plate 113 and flow thereabove so as to be discharged from the gas 25 discharge port 105 to the outside. [0089] In this way, in the fluid bed drying apparatus of the third embodiment, the inclined head 131 is provided inside the drying container 101 so that the inclined belt serves as the guide device which guides the fluidizing gas 30 and the product steam to flow from the dry coal discharge port 103 toward the raw coal input port 102 so that the fluidizing gas and the product steam are guided to the gas discharge port 105 and serves as the conveying device which 40 conveys the particles of the dry coal falling thereon toward the raw coal input port 102. [00901 Accordingly, the fluidizing gas and the product steam rising from the fluid bed S are guided to flow from 5 the dry coal discharge port 103 toward the raw coal input port 102 by the inclined head 131 so that the fluidizing gas and the product steam are guided to the gas discharge port 105. Then, the particles of the dry coal obtained with the fluidizing gas and the product steam are separated 10 from the fluidizing gas and the product steam, are returned toward the raw coal input port 102, are mixed with the raw coal which is not dried yet, and are moved again in the fluid bed S. Thus, the heating and the drying of the raw coal input from the raw coal input port 102 may be promoted, 15 and hence the raw coal drying efficiency may be improved. [0091] Further, when the fluidizing gas and the product steam flow above the inclined head 131 so as to collide with plural collision plates 112, the particles of the dry coal thereof are separated so as to fall onto the inclined 20 head 131. Then, the dry coal is conveyed toward the raw coal input port 102 by the superheated steam ejected from the respective ejection nozzles 131a, and is input to the preheating zone of the fluid bed S. Thus, the dry coal may be appropriately mixed with the raw coal which is not dried 25 yet, so that the drying of the raw coal may be promoted. [00921 Furthermore, in the second and third embodiments, the inclined belt 121 and the inclined head 131 with the ejection nozzle 131a are provided as the conveying device, but the invention is not limited to the configuration. For 30 example, a vibration exciter may be provided in the inclined plate so as to convey the particles of the dry coal by vibrating the inclined plate. Further, a scraping member may be provided on the inclined plate in a movable 41 manner. Fourth Embodiment [0093] FIG. 6 is a schematic side view illustrating a fluid bed drying apparatus according to a fourth embodiment 5 of the invention. Furthermore, the same reference sign will be given to the same component as that of the above described embodiment, and the detailed description thereof will not be repeated. [0094] In the fourth embodiment, as illustrated in FIG. 10 6, a fluid bed drying apparatus 12a includes a drying container 201, a raw coal input port (wet raw material input unit) 202, a dry coal discharge port (dry material discharge unit) 203, a fluidizing gas supply port (fluidizing gas supply unit) 204, a gas discharge port (gas 15 discharge unit) 205, and a heat transfer pipe (heating unit) 206. [00951 The drying container 201 is formed in a hollow box shape, where one end side thereof is equipped with the raw coal input port 202 which inputs the raw coal 20 therethrough and the other end side thereof is equipped with the dry coal discharge port 203 which discharges the dry material obtained by heating and drying the raw coal therethrough. Further, the lower portion of the drying container 201 is equipped with a dispersion plate 207 which 25 has plural openings and is separated from a bottom plate 201a by a predetermined distance, and the bottom plate 201a is equipped with a fluidizing gas supply port 204 which supplies the fluidizing gas (superheated steam) into the drying container 201 therethrough. Moreover, the upper 30 portion of the drying container 201 is equipped with the gas discharge port 205 which discharges the fluidizing gas and the product steam therethrough. In this case, the drying container 201 has a configuration in which a ceiling 42 portion 201b is inclined upward from the dry material discharge port 203 toward the gas discharge port 205 and the fluidizing gas and the product steam flow along the inclined ceiling portion 201b so as to be guided to the gas 5 discharge port 205 without staying at a certain portion. [0096] Since the raw coal is supplied from the raw coal input port 202 into the drying container 201 and the fluidizing gas is supplied from the fluidizing gas supply unit 204 thereinto through the dispersion plate 207, a 10 fluid bed S with a predetermined thickness is formed above the dispersion plate 207, and a freeboard F is formed above the fluid bed S. Then, the heat transfer pipe 206 is disposed so as to penetrate the drying container 201 from the outside and to circulate inside the fluid bed S, and 15 the raw coal may be heated and dried by the superheated steam flowing through the heat transfer pipe 206. [00971 Further, in the drying container 201, the fluidizing gas is supplied from the fluidizing gas supply port 204 to the fluid bed S through the dispersion plate 20 207 and the raw coal of the fluid bed S is dried so that the moisture contained in the raw coal evaporates so as to produce the steam. The fluidizing gas and the product steam are discharged from the gas discharge port 205. However, in the embodiment, collision plates 212 and a flow 25 guiding plate (partition plate) 213 are provided as a guide device that guides the flow of the fluidizing gas and the product steam from the dry coal discharge port 203 to the raw coal input port 202 so that the fluidizing gas and the product steam are guided to the gas discharge port 205. 30 [00983 The collision plates 212 are provided at the upper portion of the freeboard F so that the fluidizing gas and the product steam guided to flow from the dry material discharge port 203 toward the raw coal input port 202 43 collide with the collision plates, and the particles of the dry material obtained with the fluidizing gas and the product steam are separated. For this reason, a collision plate group 214 is formed by providing plural collision 5 plates 212 below the ceiling portion 201b of the drying container 201 at the upper portion of the freeboard F. Since the collision plate group 214 is substantially disposed in the vertical direction so as to face the flow of the fluidizing gas and the product steam flowing from 10 the dry material discharge port 203 toward the raw coal input port 202 and the collision plates 212 are disposed with a predetermined gap therebetween, a passage is ensured in which the fluidizing gas and the product steam flow in a meandering manner. 15 [0099] Further, the collision plate group 214 serves to guide the fluidizing gas and the product steam inside the drying container 201 from the dry material discharge port 203 toward the raw coal input port 202. That is, the collision plate group 214 is disposed at a position where 20 the lower end thereof is inclined upward from the raw coal input port 202 toward the dry coal discharge port 203. In other words, the lower end of the collision plate group 214 is disposed so as to depict an imaginary plane L that is inclined upward from the raw coal input port 202 toward the 25 dry material discharge port 203. For this reason, the gap formed between the imaginary plane L and the upper surface of the fluid bed S is set so that the gap gradually increases from the raw coal input port 202 toward the dry material discharge port 203. Thus, the fluidizing gas and 30 the product steam may be guided toward the dry material discharge port 203 and may be guided from the dry material discharge port 203 toward the raw coal input port 202. [0100] Further, the raw coal input port 202 and the gas 44 discharge port 205 are disposed at one end side of the drying container 201, and the gas discharge port 205 is disposed above the raw coal input port 202. Then, the flow guiding plate 213 is disposed so as to define the raw coal 5 input port 202 and the gas discharge port 205. That is, the flow guiding plate 213 is disposed in the freeboard F above the fluid bed S so as to be inclined downward from the raw coal input port 202 toward the dry material discharge port 203, the base end thereof is disposed with a 10 predetermined gap between the base end and the wall surface near the raw coal input port 202 of the drying container 201, the front end thereof is disposed with a predetermined gap between the front end and the lower end of the collision plate 212, and both side portions thereof are 15 fixed to the respective wall surfaces of the drying container 201 in a close contact state without a gap therebetween. [01011 Accordingly, since the raw coal is supplied from the raw coal input port 202 into the drying container 201 20 and the fluidizing gas is supplied from the fluidizing gas supply port 204 thereinto through the dispersion plate 207, the fluid bed S having a predetermined thickness is formed above the dispersion plate 207. The raw coal is moved in the fluid bed S by the fluidizing gas toward the dry 25 material discharge port 203. At this time, the raw coal is heated and dried by the heat from the heat transfer pipe 206. In this case, the raw coal is heated and dried by the heat from the heat transfer pipe 206 while being moved from the raw coal input port 202 to the dry coal discharge port 30 203. However, the raw coal immediately after input from the raw coal input port 202, that is, positioned below the flow guiding plate 213 becomes a preheated state, so that the moisture substantially does not evaporate.

45 Subsequently, when the raw coal moves beyond the preheating zone, that is, the lower position of the flow guiding plate 213, the evaporation of the moisture starts and gradually increases to the maximal state. Then, the evaporation of 5 the moisture decreases as it approaches the dry coal discharge port 203. [0102] Then, the steam which is produced by heating and drying the raw coal at the fluid bed S below the collision plate group 214 rises along with the fluidizing gas and 10 flows toward the dry material discharge port 203 by the collision plate group 214. Then, the fluidizing gas and the product steam bypass the wall surface near the dry material discharge port 203 of the drying container 201 and flow toward the raw coal input port 202. At this time, the 15 fluidizing gas and the product steam collide with plural collision plates 212, so that the particles of the dry coal obtained with the fluidizing gas and the product steam are separated so as to fall to the fluid bed S. Here, the particles of the dry coal and the raw coal which is not 20 dried yet are mixed with each other at the fluid bed S, so that the drying of the raw coal which is not dried yet is promoted. Subsequently, the dry coal obtained by drying the raw coal is discharged from the dry coal discharge port 203 to the outside, and the fluidizing gas and the product 25 steam from which the particles of the dry coal are separated are guided to the flow guiding plate 213 and flow thereabove so as to be discharged from the gas discharge port 205 to the outside. {01031 In this way, the fluid bed drying apparatus of 30 the fourth embodiment includes the drying container 201 which is formed in a hollow shape, the raw coal input port 202 which inputs the raw coal to one end side of the drying container 201 therethrough, the dry coal discharge port 203 46 which discharges the dry coal obtained by heating and drying the raw coal from the other end side of the drying container 201 therethrough, the fluidizing gas supply port 204 which supplies the fluidizing gas to the lower portion 5 of the drying container 201 so as to form the fluid bed S along with the raw coal, the gas discharge port 205 which discharges the fluidizing gas and the, product steam from the upside of the raw coal input port 202 at one end side of the drying container 201 therethrough, the heat transfer 10 pipe 206 which heats the raw coal of the fluid bed S, and the collision plates 212 which are provided as the guide device for causing the fluidizing gas and the product steam to flow from the dry coal discharge port 203 toward the raw coal input port 202 so that the fluidizing gas and the 15 product steam are guided to the gas discharge port 205. [0104] Accordingly, the fluidizing gas and the product steam rising from the fluid bed S are guided by the collision plate group 214 to flow from the dry coal discharge port 203 toward the raw coal input port 202 so 20 that the fluidizing gas and the product steam are guided to the gas discharge port 205. Then, the particles of the dry coal obtained with the fluidizing gas and the product steam are separated from the fluidizing gas and the product steam, are returned toward the raw coal input port 202, are mixed 25 with the raw coal which is not dried yet, and are moved in the fluid bed S. Thus, the heating and the drying of the raw coal input from the raw coal input port 202 may be promoted, and hence the raw coal drying efficiency may be improved. 30 [0105] Further, in the fluid bed drying apparatus of the fourth embodiment, the collision plate group 214 is disposed so as to face the flow direction of the fluidizing gas and the product steam, and plural collision plates are 47 disposed with a predetermined gap therebetween in the same direction. Thus, the lower end of the collision plate group 214 is disposed so as to be inclined upward from the raw coal input port 202 toward the dry coal discharge port 5 203. Accordingly, since the lower end of the collision plate group 214 is disposed so as to depict the imaginary plane L that is inclined upward from the raw coal input port 202 toward the dry material discharge port 203, the fluidizing gas and the product steam flow toward the dry 10 coal discharge port 203, and flow toward the raw coal input port 202. Thus, the fluidizing gas and the product steam may be appropriately guided to flow toward the gas discharge port 205. Fifth Embodiment 15 [01061 FIG. 7 is a schematic side view illustrating a fluid bed drying apparatus according to a fifth embodiment of the invention. Furthermore, the same reference sign will be given to the same component as that of the above described embodiment, and the detailed description thereof 20 will not be repeated. [0107] in the fifth embodiment, as illustrated in FIG. 7, the fluid bed drying apparatus 12a includes the drying container 201, the raw coal input port 202, the dry coal discharge port 203, the fluidizing gas supply port 204, the 25 gas discharge port 205, and the heat transfer pipe 206. [0108] Further, the drying container 201 includes collision plates 222 and the flow guiding plate 213 as the guide device which guides the fluidizing gas and the product steam to flow from the dry material discharge port 30 203 toward the raw coal input port 202 so that the fluidizing gas and the product steam are guided to the gas discharge port 205. [01091 The collision plates 222 are provided in the 48 upper portion of the freeboard F so that the fluidizing gas and the product steam guided to flow from the dry material discharge port 203 toward the raw coal input port 202 collide with the collision plates and the particles of the 5 dry material obtained with the fluidizing gas and the product steam are separated. For this reason, a collision plate group 224 is formed by providing plural collision plates 222 below the ceiling portion 201b of the drying container 201 at the upper portion of the freeboard F. 10 Since the collision plate group 224 is disposed while being inclined by a predetermined angle so as to face the flow of the fluidizing gas and the product steam flowing from the dry material discharge port 203 toward the raw coal input port 202 and the collision plates 222 are disposed with a 15 predetermined gap therebetween, a passage is ensured in which the fluidizing gas and the product steam flow in a meandering manner. In this case, the respective collision plates 222 are set to have an inclination angle in which the lower ends thereof face the raw coal input port 202. 20 [01101 Further, the collision plate group 224 serves to guide the fluidizing gas and the product steam inside the drying container 201 from the dry material discharge port 203 toward the raw coal input port 202. That is, the collision plate group 224 is disposed at a position where 25 the lower end thereof is inclined upward from the raw coal input port 202 toward the dry coal discharge port 203. In other words, the lower end of the collision plate group 224 is disposed so as to depict the imaginary plane L that is inclined upward from the raw coal input port 202 toward the 30 dry material discharge port 203. [0111] Accordingly, since the raw coal is supplied from the raw coal input port 202 into the drying container 201 and the fluidizing gas is supplied from the fluidizing gas 49 supply port 204 thereinto through the dispersion plate 207, the fluid bed S having a predetermined thickness is formed above the dispersion plate 207. The raw coal is moved in the fluid bed S by the fluidizing gas toward the dry 5 material discharge port 203. At this time, the raw coal is heated and dried by the heat from the heat transfer pipe 206. In this case, the raw coal is heated and dried by the heat from the heat transfer pipe 206 while being moved from the raw coal input port 202 to the dry coal discharge port 10 203. However, the raw coal immediately after input from the raw coal input port 202, that is, positioned below the flow guiding plate 213 becomes a preheated state, so that the moisture substantially does not evaporate. Subsequently, when the raw coal moves beyond the preheating 15 zone, that is, the lower position of the flow guiding plate 213, the evaporation of the moisture starts and gradually increases to the maximal state. Then, the evaporation of the moisture decreases as it approaches the dry coal discharge port 203. 20 [01121 Then, the steam which is produced by heating and drying the raw coal at the fluid bed S below the collision plate group 224 rises along with the fluidizing gas and flows toward the dry material discharge port 203 by plural collision plates 222, that is, the inclination angle of the 25 collision plates 222. Then, the fluidizing gas and the product steam bypass the wall surface near the dry material discharge port 203 of the drying container 201 and flow toward the raw coal input port 202. At this time, the fluidizing gas and the product steam collide with plural 30 collision plates 222, so that the particles of the dry coal obtained with the fluidizing gas and the product steam are separated so as to fall to the fluid bed S. Here, the particles of the dry coal and the raw coal which is not 50 dried yet are mixed with each other at the fluid bed S, so that the drying of the raw coal which is not dried yet is promoted. Subsequently, the dry coal obtained by drying the raw coal is discharged from the dry coal discharge port 5 203 to the outside, and the fluidizing gas and the product steam from which the particles of the dry coal are separated are guided to the flow guiding plate 213 and flow thereabove so as to be discharged from the gas discharge port 205 to the outside. 10 [01131 In this way, in the fluid bed drying apparatus of the fifth embodiment, the collision plates 222 are provided inside the drying container 201 so as to serve as the guide device which guides the fluidizing gas and the product steam to flow from the dry coal discharge port 203 toward 15 the raw coal input port 202 so that the fluidizing gas and the product steam are guided to the gas discharge port 205, and the lower ends of the collision plates 222 are inclined so as to face the raw coal input port 202. [0114] Accordingly, the fluidizing gas and the product 20 steam rising from the fluid bed S are guided by plural collision plates 222 to flow from the dry coal discharge port 203 toward the raw coal input port 202 so that the fluidizing gas and the product steam are guided to the gas discharge port 205. Then, the particles of the dry coal 25 obtained with the fluidizing gas and the product steam are separated from the fluidizing gas and the product steam, are returned toward the raw coal input port 202, are mixed with the raw coal which is not dried yet, and are moved in the fluid bed S. Thus, the heating and the drying of the 30 raw coal input from the raw coal input port 202 may be promoted, and hence the raw coal drying efficiency may be improved. [0115] Furthermore, in the fifth embodiment, the lower 51 end of the collision plate group 224 is disposed at a position where the lower end is inclined upward from the raw coal input port 202 toward the dry coal discharge port 203 and the lower ends of the respective collision plates 5 222 are inclined so as to face the raw coal input port 202. However, the collision plate group may serve as the guide device just by inclining the lower ends of the respective collision plates 222 toward the raw coal input port 202. [0116] Further, in the fourth and fifth embodiments, 10 since the gas discharge port 205 is disposed above the raw coal input port 202, the lower side of the gas discharge port 205 becomes a negative pressure state due to the stack effect of the gas discharge port 205. Accordingly, the fluidizing gas and the product steam rising from the fluid 15 bed S are guided to flow from the dry coal discharge port 203 toward the raw coal input port 202, so that the fluidizing gas and the product steam are easily guided to the gas discharge port 205. In this case, the flow guiding plate 213 also serves as the guide device along with the 20 collision plates 212 and 222. [0117] Further, in the above-described respective embodiments, the inclined plate 111, the inclined belt 121, the inclined head 131, the collision plates 112, 212, and 222, and the flow guiding plates 113 and 213 are provided 25 as the guide device of the invention. However, a heating guide device may be provided so as to prevent the adhering of the particles of the respective raw coal particles or the condensing of the fluidizing gas and the product steam. In this case, an electric heater, a heat transfer pipe 30 through which superheated steam flows, and the like may be used. [0118] Further, in the above-described respective embodiments, the low-grade coal is used as the wet raw 52 material, but high-grade coal may be employed. Further, the wet raw material is not limited to the coal, and biomass which is used as a renewable biological organic resource may be employed. For example, thinned wood, waste 5 wood, driftwood, grass, waste, mud, a tire, and recycled fuel (pellet or chip) produced therefrom may be employed. Sixth Embodiment [01191 Next, an embodiment (a sixth embodiment) of a fluid bed drying facility that includes a fluid bed drying 10 apparatus will be described by referring to FIGS. 8 to 10. In the sixth embodiment, an example will be described in which the fluid bed drying facility according to the invention is applied to an integrated coal gasification combined cycle facility (integrated coal gasification 15 combined system). However, the application subject of the invention is not limited to the integrated coal gasification combined cycle facility. For example, as a power generating system using product coal dried by the fluid bed drying facility, a power generating system using 20 a brown coal fired boiler may be used in which product coal dried by the fluid bed drying facility is supplied to a boiler furnace, a steam turbine is driven by steam produced from the boiler furnace so as to obtain an output using a generator. Further, even when the invention is applied to 25 the integrated coal gasification combined cycle facility, the type does not matter. Further, in the embodiment, a case will be described in which brown coal is used as the wet raw material (subject drying material). However, a large amount of moisture may be contained in the coal. For 30 example, low-grade coal such as subbituminous coal or sludge may be also used. [0120] FIG. 8 is a schematic diagram illustrating an embodiment of an integrated coal gasification combined 53 ' cycle facility that employs a fluid bed drying facility according to the sixth embodiment of the invention. FIG. 9 is a schematic diagram illustrating the fluid bed drying facility that includes the fluid bed drying apparatus 5 according to the sixth embodiment illustrated in FIG. 8. [0121] As illustrated in FIG. 8, an integrated coal gasification combined cycle (IGCC) facility 310 includes a fluid bed drying facility 400 which dries brown coal 432 as fuel so as to obtain product coal 440, a mill 320 which 10 mills the product coal 440 so as to obtain pulverized coal 340, a coal gasification furnace 313 which processes the pulverized coal 340 into a gasified gas 342, a gas turbine (GT) 314 which is operated by using the gasified gas 342 as fuel, an exhausted heat recovery boiler (Heat Recovery 15 Steam Generator: HRSG) 316 which intrudes a turbine flue gas 346 from the gas turbine 314, a steam turbine (ST) 318 which is operated by steam 348 produced by the exhausted heat recovery boiler 316, and a generator (G) 319 which is connected to the gas turbine 314 and/or the steam turbine 20 318. Further, the integrated coal gasification combined cycle facility 310 includes a condenser 334 which condenses the steam discharged from the steam turbine 318 and returns the result to the exhausted heat recovery boiler 316, a compressor 336 which is connected to the gas turbine 314 25 and rotates along with the gas turbine 314 so as to compress air 354, and an air separating unit (ASU) 338 which separates the air into nitrogen (N 2 ) and oxygen (02), supplies the separated oxygen to a pipe through which the air compressed by the compressor 336 flows, and supplies 30 the nitrogen to a conveying path of the pulverized coal 340 conveyed from the mill 320 to the coal gasification furnace 313. Furthermore, the air 354 compressed by the compressor 336 is supplied to the coal gasification furnace 313 and 54 the combustor 326. [0122] The integrated coal gasification combined cycle facility 310 dries the brown coal 432 at the fluid bed drying facility 400 so as to produce the product coal 440 5- and gasifies the pulverized coal 340, obtained by milling the product coal 440 using the mill 320, at the coal gasification furnace 313 so as to obtain the gasified gas 342 as the product gas. The integrated coal gasification combined cycle facility 310 performs a dust removing 10 process and a gas purifying process on the gasified gas 342 at a cyclone 322 and a gas purification device 324 and supplies the gas to the combustor 326 of the gas turbine 314 as a power generating unit so as to produce hot and pressurized combustion gas 350 therein. Then, the 15 integrated coal gasification combined cycle facility 310 drives the gas turbine 314 by the combustion gas 350. In the integrated coal gasification combined cycle facility 310, the gas turbine 314 is connected to the generator 319, and the gas turbine 314 is driven so as to generate power 20 by the generator 319. Here, the turbine flue gas 346 obtained after driving the gas turbine 314 still has a temperature of about 500 to 600 0 C. The integrated coal gasification combined cycle facility 310 sends the turbine flue gas 346 to the exhausted heat recovery boiler (HRSG) 25 316, and collects the thermal energy of the turbine flue gas 346 by the exhausted heat recovery boiler (HRSG) 316. The integrated coal gasification combined cycle facility 310 produces the steam 348 by the thermal energy collected from the turbine flue gas 346 at the exhausted heat 30 recovery boiler (HRSG) 316 and drives the steam turbine 318 by the steam 348. The integrated coal gasification combined cycle facility 310 removes NOx and Sox by the gas purification device 330 from the flue gas 352 as a gas 55 obtained by collecting the thermal energy from the turbine flue gas 346 at the exhausted heat recovery boiler (HRSG) 316, and discharges the gas to the atmosphere through a stack 332. 5 [0123] Hereinafter, the fluid bed drying facility 400 will be described by referring to FIG. 9. As illustrated in FIG. 9, the fluid bed drying facility 400 includes a supply hopper 401 which supplies the brown coal 432 having a large amount of moisture as one wet raw material as a 10 subject drying material, a fluid bed drying apparatus 402 which dries the supplied brown coal 432, a cooling trap 403 which cools product steam 434 discharged from the fluid bed drying apparatus 402 and removes dust from the product steam 434, a superheating unit 404 which superheats product 15 steam 435a cooled by the cooling trap 403, a bifurcation portion 405 which bifurcates product steam 435b superheated by the superheating unit 404, a cooler 410 which cools dry brown coal 438 extracted from the fluid bed drying apparatus 402 so as to obtain the product coal 440, a heat 20 recovery system 411 which is provided at the downstream side of the bifurcation portion 405 so as to collect the heat of the product steam 435b, a water treatment unit 412 which treats the product steam 435b from which the heat is collected by the heat recovery system 411 and discharges 25 the product steam as drainage water 442, and a circulation device 414 which circulates the product steam 435b bifurcated by the bifurcation portion 405 and supplies the product steam as fluidizing steam 436 to the fluid bed drying apparatus 402. 30 [01241 Further, the fluid bed drying facility 400 includes a product steam line L, which discharges the product steam 434 produced when drying the brown coal 432 to the outside of the fluid bed drying apparatus 402 and 56 guides the product steam to the bifurcation portion 405, a line L 2 which is a line bifurcated by the bifurcation portion 405 and supplies the fluidizing steam (fluidizing gas) 436 into the fluid bed drying apparatus 402, and a 5 product line L 3 which discharges the product coal 440 produced by cooling the dry brown coal 438 by the cooler 410 as the pipes used to connect the respective components to one another. [0125] The supply hopper 401 is a facility that stores 10 the brown coal 432. The supply hopper 401 supplies the brown coal 432 stored therein into the fluid bed drying apparatus 402. [0126] The fluid bed drying apparatus 402 forms the fluid bed by the fluidizing steam 436 and the brown coal 15 432 supplied from the supply hopper 401 and heats and dries the brown coal 432 by the heating unit while moving the brown coal 432 so as to become the dry brown coal 438. Further, the fluid bed drying apparatus 402 mixes the fluidizing steam 436 with the steam produced when drying 20 the brown coal 432 so as to obtain the product steam 434. The fluid bed drying apparatus 402 includes a heat transfer member 428 and a superheated steam supply device (high temperature gas supply unit) 429 capable of supplying superheated steam (high-temperature gas) A to the heat 25 transfer member 428 as a heating unit provided therein. [01271 Next, the fluid bed drying apparatus 402 will be described by referring to FIG. 10. Here, FIG. 10 is a schematic diagram illustrating the fluid bed drying apparatus according to the sixth embodiment illustrated in 30 FIG. 9. Furthermore, FIG. 10 is a schematic configuration diagram illustrating the cooling trap 403 and the superheating unit 404 in addition to the fluid bed drying apparatus 402.

57 [0128] The fluid bed drying apparatus 402 includes a drying container 420 into which the brown coal 432 is input, an input unit (input port) 422 into which the brown coal 432 is input, a discharge unit (discharge port) 423 from 5 which the dry brown coal 438 obtained by drying the brown coal 432 is discharged, a gas dispersion plate 424 which is provided inside the drying container 420, a fluidizing gas supply unit (fluidizing gas supply port) 426 which supplies the fluidizing steam 436 to the drying container 420, and a 10 steam discharge unit (steam discharge port) 427 through which the product steam 434 is discharged. Further, as described above, the fluid bed drying apparatus 402 includes the heat transfer member 428 and the superheated steam supply device (high-temperature gas supply unit) 429 15 capable of supplying superheated steam (high-temperature gas) A to the heat transfer member 428 as a heating unit provided therein (see FIG. 9). [0129] The inner space of the drying container 420 is defined as a drying chamber 450 positioned at the upper 20 side in the vertical direction (the upper side of the drawing) and a chamber 452 positioned at the lower side in the vertical direction (the lower side of the drawing) by the gas dispersion plate 424. Furthermore, the drying chamber 450 is a zone into which the brown coal 432 is 25 supplied, and the chamber 452 is a zone into which the fluidizing steam (fluidizing gas) 436 is supplied. In the drying container 420, the fluidizing steam 436 supplied to the chamber 452 passes through the gas dispersion plate 424 so as to be supplied to the drying chamber 450. The drying 30 chamber 450 forms a fluid bed 455 by moving the brown coal 432 using the fluidizing steam 436. [0130] The input unit 422 is connected to one end of the drying chamber 450 of the drying container 420. The input 58 unit 422 is connected to the supply hopper 401, and supplies the brown coal 432 supplied from the supply hopper 401 to the drying chamber 450 at one end side thereof. The discharge unit 423 is connected to the lower side of the 5 vertical direction of the other end of the drying chamber 450 of the drying container 420, that is, the vicinity of the gas dispersion plate 424. The discharge unit 423 is connected to the pipe connected to the cooler 410, and discharges the dry brown coal 438 inside the drying chamber 10 450 into the pipe. [0131] Further, the gas dispersion plate 424 is equipped with plural penetration holes 424a. The gas dispersion plate 424 causes a gas to circulate between the drying chamber 450 and the chamber 452 while suppressing the brown 15 coal 432 inside the drying chamber 450 from falling into the chamber 452. The fluidizing gas supply unit 426 is connected to the chamber 452, and supplies the fluidizing steam 436 supplied from the line L 2 into the chamber 452. The steam discharge unit 427 is connected to the upper 20 surface of the drying chamber 450. The steam discharge unit 427 guides the product steam 434 inside the drying container 420 to the product steam line Li. [0132] Here, in the embodiment, the fluid bed drying apparatus 402 includes plural partition plates 454 disposed 25 inside the drying chamber 450. Further, in the embodiment, the number of the partition plates is set to four, but the invention is not limited thereto. That is, the number may be appropriately set. Each partition plate 454 is a plate which extends in the width direction and the vertical 30 direction of the drying container 420, and is a plate which has a front surface (a surface with a large area) as a surface perpendicular to the line connecting the input unit 422 to the discharge unit 423. As illustrated in FIG. 10, 59 the lower end of the partition plate 454 in the vertical direction contacts the gas dispersion plate 424, and the upper end thereof in the vertical direction is positioned below the upper end of the fluid bed 455. Further, the 5 partition plates 454 are disposed in the entire area of the drying chamber 450. Further, plural partition plates 454 are disposed with a predetermined gap therebetween in a direction from the input unit 422 toward the discharge unit 423. Accordingly, in the fluid bed drying apparatus 402, 10 the inside of the drying chamber 450 of the drying container 420 is divided by plural partition plates 454 into plural separate drying chambers 450a, 450b, 450c, 450d, and 450e in a direction from the input unit 422 toward the discharge unit 423. Furthermore, the separate drying 15 chambers 450a, 450b, 450c, 450d, and 450e are disposed in order of the separate drying chamber 450a, the separate drying chamber 450b, the separate drying chamber 450c, the separate drying chamber 450d, and the separate drying chamber 450e in a direction from the input unit 422 toward 20 the discharge unit 423. Further, the chamber 452 is also divided into five separate chambers 452a, 452b, 452c, 452d, and 452e corresponding to the separate drying chambers 450a, 450b, 450c, 450d, and 450e. [01331 Further, five fluidizing gas supply units 426 are 25 provided so as to correspond to the separate chambers 452a, 452b, 452c, 452d, and 452e, and supply the fluidizing steam 436 to the respective separate chambers 452a, 452b, 452c, 452d, and 452e. The heat transfer members 428 are disposed in the respective fluid beds 455 of the separate drying 30 chambers 450a, 450b, 450c, 450d, and 450e so as to extend in the width direction. [0134] In the fluid bed drying apparatus 402, the brown coal 432 is input into the separate drying chamber 450a of 60 the drying container 420 by the supply hopper 401 and the fluidizing steam 436 is introduced into the separate chamber 452a. The fluidizing steam 436 introduced into the chamber 452a passes through the penetration hole 424a of 5 the gas dispersion plate 424 and flows into the separate drying chamber 450a. The fluidizing steam 436 which is introduced into the separate drying chamber 450a blows the brown coal 432 input into the separate drying chamber 450a so that the brown coal is raised. Accordingly, the fluid 10 bed drying apparatus 402 forms the fluid bed 455 in which the brown coal 432 flows inside the separate drying chamber 450a. A part of the brown coal 432 fluidized by the separate drying chamber 450a moves upward in the vertical direction in relation to the partition plate 454, moves in 15 a direction indicated by an arrow 456a, and moves to the separate drying chamber 450b. [0135] In the fluid bed drying apparatus 402, the fluidizing steam 436 is also introduced into the separate chamber 452b. The fluidizing steam 436 which is introduced 20 into the chamber 452b passes through the penetration hole 424a of the gas dispersion plate 424 and flows into the separate drying chamber 450b. The fluidizing steam 436 which is introduced into the separate drying chamber 450b blows the brown coal 432 input into the separate drying 25 chamber 450b so that the brown coal is raised. Accordingly, the fluid bed drying apparatus 402 forms the fluid bed 455 in which the brown coal 432 flows inside the separate drying chamber 450b. A part of the brown coal 432 fluidized by the separate drying chamber 450b moves upward 30 in the vertical direction in relation to the partition plate 454, moves in a direction indicated by an arrow 456b, and moves to the separate drying chamber 450c. The fluid bed drying apparatus 402 forms the fluid bed 455 along with 61 the fluidizing steam 436 so that the moving brown coal 432 is supplied to the fluid bed even in the separate drying chambers 450c, 450d, and 450e. Further, a part of the brown coal 432 of the fluid bed 455 of the separate drying 5 chamber 450c moves upward in the vertical direction in relation to the partition plate 454, moves in a direction indicated by an arrow 456c, and moves to the separate drying chamber 450d. A part of the brown coal 432 of the fluid bed 455 of the separate drying chamber 450d moves 10 upward in the vertical direction in relation to the partition plate 454, moves in a direction indicated by an arrow 456d, and moves to the separate drying chamber 450e. The fluid bed drying apparatus 402 discharges the brown coal, reaching the discharge unit 423 in the brown coal 432 15 becoming the fluid bed 455 in the separate drying chamber 450e, as the dry brown coal 438 from the discharge unit 423. [0136] In this way, the fluid bed drying apparatus 402 forms the fluid bed 455 in a portion including the separate drying chambers 450a, 450b, 450c, 450d, and 450e as the 20 portion at the lower side of the drying chamber 450 in the vertical direction. The brown coal 432 after input into the input unit 422 forms the fluid bed 455, moves so as to pass through the separate drying chambers 450a, 450b, 450c, 450d, and 450e in this order, and is discharged from the 25 discharge unit 423. Furthermore, the brown coal 432 is gradually dried when passing through the separate drying chambers 450a, 450b, 450c, 450d, and 450e, and becomes the dry brown coal 438 when being discharged from the discharge unit 423. 30 [0137] In the fluid bed drying apparatus 402, the freeboard F is formed at the upper side in the vertical direction in relation to the fluid bed 455 of the drying chamber 450. The freeboard F becomes a zone in which the 62 product steam 434 is produced by drying the brown coal 432 of the fluid bed 455. Furthermore, the fluidizing steam 436 is steam having a predetermined temperature or more, and dries the brown coal 432 by heating the brown coal 432 5 in a fluidized state. 101381 Next, the heat transfer members 428 are disposed in the zones where the fluid beds 455 of the separate drying chambers 450a, 450b, 450c, 450d, and 450e are formed as described above. The heat transfer member 428 is a 10 heating unit which heats the brown coal 432 of the fluid bed 455 so as to remove the moisture in the brown coal 432, and is a pipe through which superheated steam A circulates. The heat transfer member 428 dries the brown coal 432 forming the fluid bed 455 by using the latent heat of the 15 high-temperature superheated steam A supplied into the heat transfer member and circulates therein. The heat transfer member 428 discharges the superheated steam A used for the drying as condensed water B to the outside of the fluid bed drying apparatus 402. 20 [01391 That is, the heat transfer member 428 condenses the superheated steam A in the zone contacting the fluid bed 455 so as to obtain a liquid (moisture), and the condensed latent heat radiated at this time is effectively used for the drying of the brown coal 432. Furthermore, as 25 the high-temperature superheated steam A circulating in the heat transfer member 428, any medium causing a change in phase may be used. For example, Freon, pentane, or ammonia may be exemplified. Further, the heat transfer member 428 is not limited to the configuration using the pipe through 30 which the heat medium circulates. The heat transfer member 428 may be configured as a heat transfer member that dries the brown coal 432 by supplying heat thereto. For example, an electric heater may be provided. Furthermore, the 63 product steam 434 which is produced when drying the brown coal 432 by the heat transfer member 428 flows to the freeboard F at the upper side in the vertical direction (the downstream side in the flow direction of the product 5 steam 434). The superheated steam supply device 429 supplies the superheated steam A to the heat transfer member 428 through the heating line L 4 . [01401 In the fluid bed drying apparatus 402, the heat transfer member 428 which is provided inside the fluid bed 10 455 heats the brown coal 432 of the fluid bed 455 so as to dry the brown coal 432. The product steam 434 which is produced by drying the brown coal 432 flows from the fluid bed 455 into the freeboard F. Then, the product steam 434 which flows into the freeboard F is discharged from the 15 steam discharge unit 427 to the outside of the fluid bed drying apparatus 402. The product steam 434 which is discharged from the steam discharge unit 427 is supplied to the product steam line L 1 . [01411 The fluid bed drying apparatus 402 may further 20 uniformly dry the brown coal by the configuration in which the drying chamber 450 is divided into plural separate drying chambers 450a, 450b, 450c, 450d, and 450e and the brown coal sequentially passes through plural separate drying chambers 450a, 450b, 450c, 450d, and 450e while 25 moving from the input unit 422 to the discharge unit 423. That is, it is possible to suppress the occurrence of the brown coal 432 which reaches the discharge unit 423 in a short time due to the flow of the fluid bed 455 or the brown coal 432 which does not reach the discharge unit 423 30 even after a long time elapses. [01421 Further, as in the embodiment, the brown coal 432 containing a comparatively small amount of moisture in one separate drying chamber and moving upward may be moved to 64 the next separate drying chamber by the configuration in which the brown coal 432 of a part of the upper side of the fluid bed 455 moves to the next separate drying chamber. That is, since the brown coal 432 which is not dried due to 5 the comparatively large amount of moisture in the separate drying chamber is heavy, the brown coal may be moved to the lower side of the separate drying chamber so as to be dried in the separate drying chamber. Accordingly, since the brown coal 432 is dried to a certain degree by the 10 respective separate drying chambers 450a, 450b, 450c, 450d, and 450e and is moved to the next separate drying chamber, the brown coal may be dried to a certain degree with high possibility when the brown coal reaches the discharge unit 423. 15 101431 Further, in the fluid bed drying apparatus 402 of the embodiment, the drying chamber 450 is divided into plural separate drying chambers by the partition plate 454 in order to appropriately dry the brown coal 432, but the invention is not limited thereto. The fluid bed drying 20 apparatus 402 may be formed in a shape in which the staying and the settling of the brown coal 432 may be suppressed regardless of the shape of the drying chamber 450, the blocking of the brown coal 432 inside the drying chamber may be suppressed, and the brown coal 432 may be uniformly 25 dried. [0144] Referring to FIGS. 9 and 10, the other components of the fluid bed drying facility 400 will be described. The cooling trap 403 cools the product steam 434 discharged from the steam discharge unit 427 of the fluid bed drying 30 apparatus 402 to the product steam line L, and separates dust (solid content) contained in the product steam 434. The cooling trap 403 includes a cooling mechanism 480 which cools the product steam 434 and a trapping unit 482 which 65 traps water droplets containing dust and condensed by the cooling of the product steam 434. Furthermore, the cooling trap 403 may include the trapping unit capable of cooling a subject to a predetermined temperature or less by 5 integrating the cooling mechanism 480 with the trapping unit 482. As the cooling mechanism 480 of the cooling trap 402, various cooling mechanisms may be used. For example, a mechanism may be provided in which a pipe covering the periphery of the product steam line Li is disposed in a 10 double pipe structure and a cooling medium flows to the pipe covering the periphery of the product steam line L, so as to cool the product steam 434 of the product steam line LI. Alternatively, a structure may be used in which a Peltier device is disposed around the product steam line Li 15 so as to cool the product steam line LI. Further, although there is a need to lengthen the pipe due to the low cooling performance, the cooling mechanism 480 may be configured as a mechanism which does not include an active cooling mechanism and cools the product steam 434 by causing the 20 product steam to pass through the product steam line L 1 by a predetermined distance. Then, the trapping unit 482 of the cooling trap 403 is configured as plural plate-like members disposed in the product steam line L 1 . Furthermore, the plate-like member may be formed in a net shape with 25 plural openings. The cooling trap 403 cools the product steam 434 so as to obtain saturated steam. At this time, the moisture in the steam is condensed by using the dust as a core. That is, the water droplets are formed so as to contain the dust. The cooling trap 403 removes or reduces 30 the dust contained in the product steam 434 by trapping the water droplets containing the dust by the trapping unit. Furthermore, the product steam 434 passes through the cooling trap 403 so that the temperature of the product 66 steam decreases and the product steam becomes the product steam 435a from which the dust is removed or reduced. [0145] The superheating unit 404 is a unit that superheats the product steam 435a that passes through the 5 cooling trap 403 along the product steam line L 1 . As illustrated in FIG. 10, the superheating unit 404 introduces the product steam line Li to the inside of the fluid bed drying apparatus 402, that is, the freeboard F of the drying container 420, and superheats the product steam 10 435a flowing through the product steam line Li by the product steam 434 inside the fluid bed drying apparatus 402. The superheating unit 404 superheats the product steam 435a flowing through the product steam line L, so as to obtain the product steam 435b hotter than the product steam 435a. 15 Furthermore, in the superheating unit 404, it is desirable that the pipe through which the product steam 435a flows be configured as a pipe which is formed of a material capable of easily absorbing heat from the outside. Further, it is desirable to form the superheating unit 404 in a shape in 20 which the pipe is bent to the freeboard F so that the product steam 435a moves in the freeboard F by a long distance. Further, the product steam may be heated by the heat exchange with the condensed water at the outlet of the heat transfer member 428. 25 [0146] The bifurcation portion 405 is a mechanism which bifurcates the product steam 435b passing through the superheating unit 404 along the product steam line Li into two lines. One line bifurcated from the bifurcation portion 405 is connected to the heat recovery system 411, 30 and the other line is connected as the branch line L 2 to the circulation device 414. [0147] The cooler 410 cools dry powder in which the solid content 444 is mixed with the dry brown coal 438 67 extracted from the fluid bed drying apparatus 402. The cooler 410 discharges the cooled powder as the product coal 440 from the product line L3. As described above, the product coal 440 is supplied to the gasification furnace 5 313. [01481 The heat recovery system 411 is a system which collects the heat of the product steam 435b by a heat exchange or the like. The product steam 435b which flows through one pipe bifurcated by the bifurcation portion 405 10 is, for example steam of 405 to 110 0 C. The heat recovery system 411 collects the heat of the product steam 435b. The water treatment unit 412 is a unit that treats the product steam 435b from which the heat is collected by the heat recovery system 411. The water treatment unit 412 15 treats the product steam 435b of which the heat is collected by the heat recovery system 411, and discharges the steam as the drainage water 442 to the outside of the fluid bed drying facility 400. [0149] Further, the circulation device 414 is provided 20 in the course of the branch line L 2 and sends air flowing through the branch line L 2 in a predetermined direction. Specifically, the circulation device 414 sends the product steam 435b, bifurcated by the bifurcation portion 405 and flowing through the branch line L 2 , into the fluid bed 25 drying apparatus 402. Furthermore, the product steam 435b sent into the fluid bed drying apparatus 402 is used as the fluidizing steam 436 that fluidizes the fluid bed of the brown coal 432. Furthermore, the fluid bed drying facility 400 of the embodiment uses a part of the product steam 435b 30 as the fluidizing medium for fluidizing the fluid bed, but the invention is not limited thereto. For example, nitrogen, carbon dioxide, or low-oxygen air containing these gases may be used.

68 [0150] According to the integrated coal gasification combined cycle facility 310, even in a case where the brown coal 432 having a large amount of moisture is gasified, the brown coal 432 is dried by the efficient fluid bed drying 5 apparatus 402. Thus, the gasification efficiency is improved, and the power generation may be performed for a long period of time. [0151] Since the fluid bed drying facility 400 of the embodiment traps the dust by cooling the product steam 434 10 using the cooling trap 403, it is possible to efficiently remove or reduce the dust in the product steam 434 with a simple configuration. Since the dust in the product steam 434 is efficiently removed and reduced, it is possible to reduce the influence of the dust on the respective 15 components disposed at the downstream side of the gas stream in relation to the cooling trap 403. Accordingly, it is possible to extend the lifetime of the respective components disposed at the downstream side of the gas stream in relation to the cooling trap 403 and hence to 20 reduce the number or the frequency of the maintenance. [0152] Further, the fluid bed drying facility 400 of the embodiment may collect the heat of the product steam 435b discharged from the fluid bed drying apparatus 402 by superheating (exchanging heat with) the product steam 435a 25 passing through the cooling trap 403 by the heat source in the system of the fluid bed drying facility 400, that is, the heat of the product steam 434 of the freeboard F of the drying container 420 through the superheating unit 404 so as to obtain the product steam 435b. With the above 30 described configuration, the fluid bed drying facility 400 of the embodiment may efficiently remove the dust from the product steam and collect the latent heat of the product steam by superheating the product steam 434 cooled by the 69 cooling trap 403 by the superheating unit 404 again. Further, since the heat of the product steam 434 of the freeboard F of the drying container 420 is used as the heat source for superheating the product steam, the product 5 steam 435a may be superheated without a new heat source. Further, as described above, the condensed water returned from the heat transfer member 428 may be used as the heating source. [0153] Furthermore, the fluid bed drying facility 400 of 10 the embodiment uses a part of the product steam 435b bifurcated by the bifurcation portion 405 for the heat recovery system 411 and uses the remainder for the fluidizing steam, but the invention is not limited thereto. The fluid bed drying facility 400 may effectively use the 15 heat of the product steam 435b superheated by the superheating unit 404. Seventh Embodiment [01541 A fluid bed drying facility according to a seventh embodiment will be described by referring to FIG. 20 11. Here, FIG. 11 is a schematic diagram illustrating a fluid bed drying facility that includes the fluid bed drying apparatus according to the seventh embodiment. A fluid bed drying facility 500 illustrated in FIG. 11 includes the supply hopper 401, the fluid bed drying 25 apparatus 402, the cooling trap 403, a superheating unit 510, the bifurcation portion 405, the cooler 410, the heat recovery system 411, the water treatment unit 412, and the circulation device 414. Further, the fluid bed drying facility 500 includes the product steam line L 1 , the branch 30 line L 2 , and the product line L 3 as the pipes connecting the respective components to one another. Furthermore, since the respective components of the fluid bed drying facility 500 have the same configurations as those of the 70 fluid bed drying facility 400 except for the superheating unit 510, the description thereof will not be repeated. [0155] The superheating unit 510 is a unit that superheats the product steam 435a passing through the 5 cooling trap 403 along the product steam line L 1 . As illustrated in FIG. 11, the superheating unit 510 superheats the product steam 435a by the condensed water B in a manner such that a portion through which the product steam 435a passing through the cooling trap 403 of the 10 product steam line L_ flows is caused to approach or contact the zone through which the condensed water B of the heat transfer member 428 flows, that is, the outer portion of the drying container 420 through which the condensed water B passing through the inside of the drying container 15 420 in the heat transfer member 428 flows. The superheating unit 510 is a mechanism which exchanges heat between the product steam 435a and the condensed water B. The superheating unit 510 obtains the product steam 435b hotter than the product steam 435a by superheating the 20 product steam 435a flowing through the product steam line L, by the condensed water B. Furthermore, in the superheating unit 510, it is desirable that the pipe through which the product steam 435a flows be configured as a pipe formed of a material capable of easily absorbing 25 heat from the outside. [0156] The fluid bed drying facility 500 may obtain the same effect as that of the above-described fluid bed drying facility by superheating the product steam 435a by the heat of the condensed water B flowing through the heat transfer 30 member 428 using the superheating unit 510. Further, since the condensed water B is produced in a manner such that the superheated steam A superheats the fluid bed, the use of the condensed water for superheating the product steam 435a 71 does not give any influence on the other processes. Further, since the condensed water B is a material which is used up, it is possible to improve the efficiency of using the heat generated from the fluid bed drying facility 500 5 by the use of the heat of the condensed water B. Reference Signs List [0157] 10, 310 integrated coal gasification combined cycle facility 11 coal supply device 10 12, 12a fluid bed drying apparatus 13 pulverizer 14 coal gasification furnace 15 char recovery unit 16 gas purification device 15 17 gas turbine facility 18 steam turbine facility 19 generator 20 exhausted heat recovery boiler 101, 201 drying container 20 102, 202 raw coal input port (wet raw material input unit) 103, 203 dry coal discharge port (dry material discharge unit) 104, 204 fluidizing gas supply port (fluidizing gas 25 supply unit) 105, 205 gas discharge port (gas discharge unit) 106, 206 heat transfer pipe (heating unit) 107, 207 dispersion plate 111 inclined plate (guide device) 30 112, 212, 222 collision plate (guide device) 113, 213 flow guiding plate (guide device) 121 inclined belt (guide device, conveying device) 131 inclined head (guide device, conveying device) 72 400 fluid bed drying facility 401 supply hopper 402 fluid bed drying apparatus 403 cooling trap 5 404, 510 superheating unit 405 bifurcation portion 410 cooler 411 heat recovery system 420 drying container 10 422 input unit 423 discharge unit 424 gas dispersion plate 426 fluidizing gas supply unit 427 steam discharge unit 15 428 heat transfer member 429 superheated steam supply device 432 brown coal 434, 435a, 435b product steam 436 fluidizing steam 20 438 dry brown coal 440 product coal 442 drainage water 450 drying chamber 450a, 450b, 450c, 450d, 450e separate drying chamber 25 452 chamber 452a, 452b, 452c, 452d, 452e separate chamber 454 partition plate 455 fluid bed 456a, 456b, 456c, 456d arrow 30 a superheated steam b condensed water f freeboard li product steam line 73 12 line 13 product line 14 heating line

Claims (5)

1. A fluid bed drying facility comprising: a fluid bed drying apparatus including a drying container, an input unit for inputting a wet raw material to one end of the drying container, a discharge unit for discharging a dry material obtained by heating and drying the wet raw material from the other end of the drying container, a gas dispersion plate for defining a drying chamber used to dry the wet raw material input into the drying container and a chamber positioned below the drying chamber in the vertical direction, the gas dispersion plate being equipped with a penetration hole capable of supplying a gas from the chamber into the drying chamber therethrough, a fluidizing gas supply unit for supplying a fluidizing gas into the chamber, the fluidizing gas forming a fluid bed along with the wet raw material in the drying chamber, and a steam discharge unit for discharging product steam produced by drying the wet raw material of the fluid bed formed by the supply of the fluidizing gas from the upside of the drying container, the fluid bed drying apparatus being used to dry the wet raw material having a large moisture content inside the drying container; a product steam line for discharging the product steam discharged from the steam discharge unit of the fluid bed drying apparatus to the outside; a cooling trap provided in the course of the product steam line, for cooling the product steam so as to remove dust contained in the product steam; 75 a cooler for cooling a dry material obtained by drying the wet raw material discharged from the discharge unit; and a first superheating unit provided at the downstream side of the cooling trap in the product steam line for guiding the cooled product steam to a zone above the fluid bed in the vertical direction inside the drying container so as to superheat the product steam by the product steam inside the drying container.

2. The fluid bed drying facility according to claim 1, wherein the fluid bed drying apparatus further includes a heating unit including a pipe disposed inside the fluid bed of the drying container and a superheating medium supply device for supplying a superheating medium to the pipe.

3. The fluid bed drying facility according to claim 2, further comprising: a second superheating unit provided at the downstream side of the cooling trap in the product steam line, for superheating the cooled product steam by the superheating medium flowing through the pipe of a zone passing through the fluid bed of the heating unit.

4. The fluid bed drying facility according to claim 1 or 3, further comprising: a branch line for bifurcating a part of the product steam heated by the superheating unit so as to supply the product steam as the fluidizing gas to the fluidizing gas supply unit.

5. The fluid bed drying facility according to any one of claims 1 to 4, further comprising: a heat recovery system for bifurcating a part of the product steam heated by the superheating unit so as to collect the heat of the product steam.