JP6453137B2 - Transport device - Google Patents

Description

  The present invention relates to a transport device that transports solid fuel.

  In a fluidized bed furnace (combustion furnace) or the like, a plurality of types of objects to be processed are input as fuel combusted in the furnace (for example, see Patent Document 1). In the fluidized bed furnace described in Patent Document 1, for example, solid materials such as waste plastic and waste wood are charged into the furnace as fuel (solid fuel). These plural types of solid fuels are transported by a single system transport device for each type, and charged into the furnace through different inlets.

JP-A-7-127835

  When solid fuel is introduced into the furnace in a single system for each type as in the prior art described in Patent Document 1 above, among the plurality of types of solid fuel, some of which have high adhesion depending on the properties of the solid fuel there were. If solid fuel with high adhesion adheres to the devices constituting the conveyance path, the conveyance of the solid fuel may be hindered.

  An object of this invention is to provide the conveying apparatus which can reduce the adhesion amount of the solid fuel adhering to the inside of an apparatus, and can convey a solid fuel stably.

  The present invention relates to a transport device that collects a plurality of types of solid fuels having different adhesion properties and throws them into a combustion furnace, and includes a transport unit that transports solid fuels and a lower adhesion property among a plurality of types of solid fuels. A first inflow portion that causes the first solid fuel that is a solid fuel to flow into the transport portion; and a second solid fuel that is a solid fuel having a higher adhesion than the first solid fuel among the plurality of types of solid fuels. A second inflow portion that is caused to flow into the transport portion downstream from the inflow portion.

  In this transfer device, the first solid fuel having lower adhesion is introduced into the transfer unit from the first inflow portion on the upstream side, and the second solid fuel having higher adhesion is disposed downstream from the first inflow portion. Since the second solid fuel that has flowed in from the second inflow portion temporarily adheres to the inside of the device, the first solid fuel that has been transported from the upstream side However, it hits the second solid fuel adhering to the inside of the apparatus, and the second solid fuel is scraped off. Thereby, the adhesion amount of the solid fuel adhering to the inside of the apparatus can be reduced, and the solid fuel can be stably conveyed.

  In addition, when transporting three or more types of solid fuel as a plurality of types of solid fuel, the solid fuel having the lowest adhesion among the three or more types of solid fuel flows from the first inflow portion as the first solid fuel. Then, the solid fuel having the highest adhesion among the three or more kinds of solid fuels flows as the second solid fuel from the second inflow portion, and the first inflow portion has a plurality of inflows for flowing the solid fuel into the transport portion. Among the sections, the second inflow section may be disposed on the most upstream side, and the second inflow section may be disposed on the most downstream side among the plurality of inflow sections that flow the solid fuel into the transport section. According to this configuration, since the first inflow portion that flows in the solid fuel having the lowest adhesion is disposed at the most upstream, even if the solid fuel that flows in downstream of the first inflow portion temporarily adheres to the inside of the device, The first solid fuel conveyed from the upstream side hits the solid fuel adhering to the inside of the apparatus, and the solid fuel is scraped off. Therefore, the amount of solid fuel adhering to the inside of the apparatus can be reduced. Further, according to this configuration, since the second inflow portion into which the most adherent solid fuel flows is arranged on the most downstream side, even if the second solid fuel is temporarily adhered to the inside of the apparatus, The solid fuel conveyed from the upstream side hits the second solid fuel adhering to the inside of the apparatus, and the second solid fuel is scraped off. Therefore, the amount of the second solid fuel that adheres to the inside of the apparatus can be reduced.

  Further, the second inflow portion may be configured to allow the second solid fuel to flow into a position where the first solid fuel passes. According to this configuration, the first solid fuel can be passed through the position where the second solid fuel flows. Therefore, even if the second solid fuel is temporarily attached to the inside of the apparatus, the first solid fuel is reliably supplied to the position where the second solid fuel is attached to suppress the attachment of the second solid fuel. can do.

  In addition, the transfer device has a constant supply amount per unit time for the first fixed amount supply unit that supplies the first solid fuel to the transfer unit at a constant amount per unit time. It may be configured to further include a second fixed amount supply unit as an amount. As a result, the supply amount of the first solid fuel and the supply amount of the second solid fuel supplied to the transfer device can be made constant, respectively, so the first solid fuel and the second solid fuel flowing into the transfer device By limiting the amount of fuel supplied and suppressing an increase in the amount of solid fuel adhering to the inside of the apparatus, the solid fuel can be stably conveyed.

  Further, the transfer device determines the supply amount of the first solid fuel by the first fixed amount supply unit and the supply amount of the second solid fuel by the second fixed amount supply unit based on the required heat amount that is required in the combustion furnace. The structure which further has the control part to control may be sufficient. Accordingly, the supply amount of the first solid fuel and the supply amount of the second solid fuel that are transported by the transport device and put into the combustion furnace are controlled in accordance with the required heat amount required in the combustion furnace. The state can be stabilized.

  The conveying unit includes a first screw unit having a first conveying blade arranged in a spiral shape with respect to the rotation axis, and a second screw unit arranged downstream of the first screw unit in the axial direction of the rotation axis. And the second screw part has a second conveying blade spirally arranged in the radial direction so as to form an opening region on the rotating shaft side, and the second conveying blade is downstream of the second inflow part. The structure arrange | positioned may be sufficient. Thereby, since the 2nd conveyance blade in which the opening area was formed in the axial center side is provided downstream of the 2nd inflow part into which the 2nd solid fuel flows in, a part of 2nd solid fuel is an opening area. Passes through and moves downstream in the transport direction. Therefore, the 2nd solid fuel which contacts a 2nd conveyance blade can be reduced, and the adhesion amount of the 2nd solid fuel adhering to a 2nd conveyance blade can be decreased.

  ADVANTAGE OF THE INVENTION According to this invention, the adhesion amount of the solid fuel adhering to the inside of an apparatus can be reduced, and solid fuel can be conveyed stably.

It is the schematic which shows the fluidized bed combustion facility of one Embodiment of this invention. It is the schematic which shows the fuel supply equipment for supplying a solid fuel to the furnace in FIG. It is the schematic which shows the solid fuel common 1st conveying apparatus in FIG. It is a side view which shows the screw conveyor which is a solid fuel common 1st conveying apparatus. It is a block block diagram which shows a fuel supply control apparatus. It is a flowchart which shows the process sequence in a fuel supply control apparatus.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the drawings. In addition, in each figure, the same code | symbol is attached | subjected to the same part or an equivalent part, and the overlapping description is abbreviate | omitted.

  A fluidized bed combustion facility 1 shown in FIG. 1 includes a circulating fluidized bed boiler 2 into which a plurality of types of solid fuel is charged, a fuel supply facility 3 that supplies a plurality of types of solid fuel to the circulating fluidized bed boiler 2, and a circulating flow. And an exhaust gas treatment facility 4 for treating the exhaust gas discharged from the layer boiler 2. Examples of the solid fuel to be introduced into the circulating fluidized bed boiler 2 include coal, paper sludge, RPF (Refuse paper & Plastic Fuel), biomass, TDF (Tire Derived Fuel), EFB (Empty Fruit Bunches), rice husk (rice husk), PK. (Palm coconut shell). Other combustible materials may be used as the solid fuel. Biomass includes, for example, building waste materials. This embodiment demonstrates the case where RPF (1st solid fuel), biomass (1st solid fuel), and coal (2nd solid fuel) are used.

  The circulating fluidized bed boiler 2 has a furnace 5 that forms a fluidized bed and burns solid fuel. At the side of the furnace 5, there is provided a fuel inlet 5a for feeding solid fuel. The fuel supply facility 3 inputs a plurality of types of solid fuel into the furnace 5 through the fuel input port 5a. Further, the furnace 5 is provided with a fluid medium supply port 5b for supplying a fluid medium.

  A gas outlet 5c for discharging exhaust gas generated by combustion is provided at the upper part of the furnace 5, and a cyclone 6 is connected to the gas outlet 5c. The cyclone 6 is called a separator, a cyclone classifier, or a cyclone separator, and functions as a solid-gas separator. The inlet 6 a of the cyclone 6 is connected to the gas outlet 5 c described above, and the outlet 6 b of the cyclone 6 is connected to the exhaust gas treatment facility 4 at the subsequent stage via the back path 7. A return line 8 called a downcomer extends downward from the bottom outlet 6 c of the cyclone 6, and the lower end of the return line 8 is connected to the furnace 5 through a lower side connection port 5 d of the furnace 5. .

  A plurality of air supply ports 5 e for supplying air into the furnace 5 are provided at the bottom of the furnace 5. Air is supplied into the furnace 5 through the air supply port 5e. In the furnace 5, coal, RPF, biomass, and a fluidized medium flow by the air supplied from the air supply port 5e to form a fluidized bed, and the solid fuel burns.

  The exhaust gas generated in the furnace 5 is introduced into the cyclone 6 along with the fluid medium. Inside the cyclone 6, a swirling flow of exhaust gas is formed, and a fluid medium and a gas are separated by a centrifugal separation action by the swirling flow. The separated fluid medium is discharged from the bottom outlet 6 c of the cyclone 6, descends in the return line 8, and the fluid medium that has passed through the return line 8 is returned to the bottom of the furnace 5.

  The back path 7 is a duct for circulating exhaust gas. The back path 7 is provided with a heat recovery unit 9 for recovering the heat of the exhaust gas. The heat recovery unit 9 includes a heat transfer tube that is introduced into the back path 7 and arranged so as to cross the exhaust gas passage. The heat of the exhaust gas flowing through the back path 7 is transferred to and recovered by a fluid (for example, boiler feed water) flowing through the heat transfer pipe.

  The exhaust gas flows from the top to the bottom in the back path 7, is discharged from the bottom of the back path 7, and is introduced into the exhaust gas treatment facility 4. The exhaust gas treatment facility 4 removes fine particles such as fly ash accompanying the exhaust gas and performs a desulfurization process on the exhaust gas. The exhaust gas processed by the exhaust gas processing facility 4 is released from the chimney 10 to the atmosphere, for example.

  Further, a furnace wall tube is formed in the furnace 5. The furnace wall pipe has a boiler tube for circulating the boiler water, and a fin that extends from the boiler tube and connects adjacent boiler tubes. The boiler water flowing in the boiler tube is heated by heat transferred from the combustion in the furnace 5 to become steam. The fluid medium that flows in the furnace 5 functions as a heat transfer medium that transmits heat generated by the combustion to the furnace wall tube. The water vapor generated in the boiler tube is supplied to, for example, a power generation turbine and used for power generation. In addition, the use of the water vapor | steam generate | occur | produced with the boiler is not limited to electric power generation, You may use water vapor | steam for another use.

  Next, the fuel supply facility 3 will be described with reference to FIG. The fuel supply facility 3 collects and transports a plurality of types of solid fuel (coal, RPF, biomass) and inputs them into the furnace 5. The fuel supply facility 3 includes a biomass receiving transport unit 11, an RPF receiving transport unit 12, a coal receiving transport unit 13, a biomass-RPF transport unit 14, and a solid fuel common transport unit 15.

  The biomass receiving and transporting unit 11 receives, stores, and transports biomass that is one of a plurality of types of solid fuel. Biomass includes wood such as building waste. Biomass is a solid fuel (first solid fuel) having a lower adhesion property among a plurality of types of solid fuels, and a solid fuel having a higher wear property. The biomass receiving and conveying unit 11 includes a biomass storage tank 16 and a biomass conveying unit 17.

  “Adhesiveness” refers to the ease with which the solid fuel adheres to the equipment constituting the transport path through which the solid fuel is transported. For example, it is possible to determine that the one having a larger amount of solid fuel adhering to the devices constituting the conveyance path (the one having a thicker solid fuel adhering thickness) has higher adhesion. In addition, the adhesion of the solid fuel can be evaluated by, for example, attaching the solid fuel to the wall surface along the vertical direction and measuring the time until the solid fuel falls. The longer the time from when the solid fuel adheres to the wall surface until the solid fuel falls, the higher the adhesion. The adhesion of the solid fuel may be evaluated by other test methods.

  The biomass storage tank 16 receives and stores biomass. A discharge port 16 a for discharging the biomass stored in the biomass storage tank 16 is provided at the bottom of the biomass storage tank 16. Biomass discharged from the discharge port 16 a is introduced into the biomass transport unit 17.

  Moreover, the screw reclaimer 16b for conveying the biomass deposited on the bottom part and introduce | transducing into the discharge port 16a is provided in the bottom part in the tank of the biomass storage tank 16. FIG. An electric motor is connected to the screw reclaimer 16b as a drive source, and a rotational driving force is transmitted from the electric motor to rotationally drive the screw reclaimer 16b. By making the rotation speed of the screw reclaimer 16b constant, the discharge amount of biomass discharged from the biomass storage tank 16 is made constant.

  The biomass transport unit 17 constitutes a transport path for transporting the biomass stored in the biomass storage tank 16. The biomass transport unit 17 transports or passes the biomass between the biomass storage tank 16 and the biomass-RPF transport unit 14.

  The biomass transport unit 17 drops the biomass transported by the biomass transport device 19 and the biomass transport device 19 that transports the biomass introduced through the biomass chute 18 connected to the bottom of the biomass storage tank 16. A biomass chute 20.

  The upper end portion of the upstream biomass chute 18 is connected to the discharge port 16 a of the biomass storage tank 16, and the lower end portion of the biomass chute 18 is connected to one end side of the biomass transfer device 19. The biomass that has dropped the biomass chute 18 is introduced into one end side of the biomass transfer device 19.

  The biomass conveyance device 19 is, for example, a screw conveyor, and conveys biomass from one end side to the other end side. A discharge port 19 a for discharging the transferred biomass is provided at the bottom of the other end side of the biomass transfer device 19. The biomass transfer device 19 may be, for example, a chain conveyor or another transfer device.

  The upper end portion of the biomass chute 20 on the downstream side is connected to the discharge port 19 a of the biomass transfer device 19, and the lower end portion of the biomass chute 20 is connected to the biomass-RPF transfer portion 14. The biomass that has dropped the biomass chute 20 is introduced into the biomass-RPF transport unit 14.

  The RPF receiving and conveying unit 12 receives, stores, and conveys RPF, which is one of a plurality of types of solid fuel. The RPF includes waste plastic. The RPF is a solid fuel having a lower adhesion property (first solid fuel) among a plurality of types of solid fuels, and is a solid fuel having a higher wear property. The RPF receiving conveyance unit 12 includes an RPF storage tank 21 and an RPF conveyance unit 22.

  The RPF storage tank 21 receives and stores RPF. A discharge port 21 a for discharging the RPF stored in the RPF storage tank 21 is provided at the bottom of the RPF storage tank 21. The RPF discharged from the discharge port 21 a is introduced into the RPF transport unit 22.

  Moreover, the screw reclaimer 21b for conveying the RPF accumulated in the bottom part and introducing it into the discharge port 21a is provided in the bottom part in the tank of the RPF storage tank 21. An electric motor is connected to the screw reclaimer 21b as a drive source, and a rotational driving force is transmitted from the electric motor to rotationally drive the screw reclaimer 21b. By making the rotation speed of the screw reclaimer 21b constant, the discharge amount of the RPF discharged from the RPF storage tank 21 is made constant.

  The RPF transport unit 22 constitutes a transport path for transporting the RPF stored in the RPF storage tank 21. The RPF transport unit 22 transports or passes the RPF between the RPF storage tank 21 and the biomass-RPF transport unit 14.

  The RPF transport unit 22 drops the RPF chute 23 connected to the bottom of the RPF storage tank 21, the RPF transport device 24 that transports the RPF introduced through the RPF chute 23, and the RPF transported by the RPF transport device 24. And an RPF chute 25.

  The upper end portion of the upstream RPF chute 23 is connected to the discharge port 21 a of the RPF storage tank 21, and the lower end portion of the RPF chute 23 is connected to one end side of the RPF transport device 24. The RPF that has dropped the RPF chute 23 is introduced to one end side of the RPF transport device 24.

  The RPF conveyance device 24 is, for example, a screw conveyor, and conveys the RPF from one end side to the other end side. At the bottom of the other end side of the RPF transport device 24, a discharge port 24a for discharging the transported RPF is provided. The RPF transport device 24 may be, for example, a chain conveyor or other transport device.

  The upper end of the downstream RPF chute 25 is connected to the discharge port 24 a of the RPF transport device 24, and the lower end of the RPF chute 25 is connected to the biomass-RPF transport unit 14. The RPF that has dropped the RPF chute 25 is introduced into the biomass-RPF transport unit 14.

  The coal receiving and conveying unit 13 receives, stores, and conveys coal, which is one of a plurality of types of solid fuel. Coal is, for example, in a powder form, and is a solid fuel having a higher adhesion property (second solid fuel) among a plurality of types of solid fuels and a solid fuel having lower wear properties. The coal receiving and conveying unit 13 includes a coal storage tank 26 and a coal conveying unit 27.

  The coal storage tank 26 receives and stores coal, for example, a hopper. A discharge port 26 a for discharging the coal stored in the coal storage tank 26 is provided at the bottom of the coal storage tank 26. Coal discharged from the discharge port 26 a is introduced into the coal transport unit 27.

  The coal conveyance unit 27 constitutes a conveyance path for conveying the coal stored in the coal storage tank 26. The coal conveyance unit 27 conveys or passes coal between the coal storage tank 26 and the solid fuel common conveyance unit 15.

  The coal conveyance unit 27 includes a coal first conveyance device 28 that conveys the coal discharged from the coal storage tank 26, a coal first chute 29 that drops the coal conveyed by the coal first conveyance device 28, and a coal first The coal 2nd conveying apparatus 30 which conveys the coal introduce | transduced through the chute | shoot 29, and the coal 2nd chute | shoot 31 which drops the coal conveyed by the coal 2nd conveying apparatus 30 are provided.

  The 1st coal conveyance device 28 has a belt conveyor and a chain conveyor, for example, and conveys coal from the one end side to the other end side. In the first coal conveying device 28, a belt conveyor is arranged at the upper stage, and a chain conveyor is arranged at the lower stage. The first coal transport device 28 includes a duct 28a that constitutes a coal transport path, a belt conveyor disposed in the upper stage in the duct 28a, and a chain conveyor disposed in the lower stage in the duct 28a.

  The belt conveyor includes a plurality of rollers 28g that are spaced apart from each other in the transport direction, and an endless belt 28h that spans the plurality of rollers 28g and transports coal. The plurality of rollers of the belt conveyor includes a driving roller and a driven roller. The driving roller is rotated by being connected to an electric motor (not shown) as a driving source. The driven roller is disposed along the circulation track of the endless chain, supports the endless belt, and rotates in conjunction with the movement of the endless belt. When the rotational driving force is transmitted from the electric motor and the driving roller is rotationally driven, the endless belt rotates along the circular path. In the belt conveyor, the belt disposed on the upper side moves in the conveyance direction and conveys coal on the belt.

  A funnel-shaped coal receiving portion 28e that is disposed below the discharge port 26a of the coal storage tank 26 and receives coal discharged from the discharge port 26a is provided on one end side of the top plate of the duct 28a. The coal discharged from the discharge port 26a of the coal storage tank 26 falls, passes through the coal receiving portion 28e, and is introduced to one end side of the duct 28a.

  The chain conveyor conveys the coal powder dropped from the belt conveyor in the duct 28a, and a plurality of flights 28b that scrape and convey the coal powder and an endless chain that supports the plurality of flights 28b at predetermined intervals. 28c and a plurality of sprockets 28d around which an endless chain 28c is stretched.

  The plurality of rollers of the belt conveyor includes a driving roller and a driven roller. The driving roller is rotated by being connected to an electric motor (not shown) as a driving source. The driven roller is disposed along the circulation track of the endless chain, supports the endless belt, and rotates in conjunction with the movement of the endless belt. When the rotational driving force is transmitted from the electric motor and the driving roller is rotationally driven, the endless belt rotates along the circular path. In the belt conveyor, the belt disposed on the upper side moves in the conveyance direction and conveys coal on the belt.

  The plurality of sprockets 28d include a driving sprocket and a driven sprocket. The drive sprocket is rotated by being connected to an electric motor (not shown) as a drive source. The driven sprocket is disposed along the orbit of the endless chain 28c, supports the endless chain 28c, and rotates in conjunction with the movement of the endless chain 28c. When the rotational driving force is transmitted from the electric motor and the driving sprocket is rotationally driven, the endless chain 28c and the flight 28b rotate along the circular path. The first coal conveying device 28 is a lower chain conveyor, and the flight 28b arranged on the lower side moves in the conveying direction, and the coal deposited on the bottom plate of the duct 28a is scraped by the plurality of flights 28b. Transport.

  The bottom plate on the other end side of the duct 28a is provided with a discharge port 28f for discharging the conveyed coal. Coal discharged from the discharge port 28 f is introduced into the coal first chute 29.

  The upper end portion of the first coal chute 29 is connected to the discharge port 28 f of the first coal conveying device 28, and the lower end portion of the first coal chute 29 is connected to one end side of the second coal conveying device 30. The coal that has dropped the first coal chute is introduced to one end of the second coal transport device 30.

  The coal second transport device 30 is, for example, a chain conveyor. The second coal transport device 30 has substantially the same configuration as the first coal transport device 28. The coal transported by the coal second transport device 30 is discharged from the discharge port 30 a and introduced into the coal second chute 31.

  The upper end portion of the second coal chute 31 is connected to the discharge port 30 a of the second coal conveying device 30, and the lower end portion of the second coal chute 31 is connected to the solid fuel common conveying portion 15. The coal that has dropped the second coal chute is introduced into the solid fuel common transport unit 15.

  The biomass-RPF conveyance unit 14 includes a biomass-RPF conveyance device 32 that merges and conveys biomass and RPF. The biomass-RPF transfer device 32 includes a first inflow portion 32a for allowing biomass to flow into the transfer device and a second inflow portion 32b for allowing RPF to flow into the transfer device. The first inflow portion 32a and the second inflow portion 32b are ducts having a rectangular cross section, for example. The first inflow portion 32 a is connected to the lower end of the biomass chute 20, and the second inflow portion 32 b is connected to the lower end of the RPF chute 25.

  The first inflow portion 32a is disposed on the upstream side which is one end side, and the second inflow portion 32b is disposed on the downstream side of the first inflow portion 32a. The 2nd inflow part 32b is arranged in the middle part in the conveyance direction of biomass-RPF conveyance device 32, for example.

  The biomass-RPF conveyance device 32 is, for example, a chain conveyor. The biomass-RPF transport device 32 includes a duct 32c that constitutes a biomass-RPF transport path, a plurality of flights 32d that are disposed in the duct 32c and transport the biomass and RPF by scraping, and a plurality of flights 32d. An endless chain 32e supported at intervals and a plurality of sprockets 32f over which the endless chain 32e is stretched are provided. The first inflow portion 32a and the second inflow portion 32b are provided on the top plate of the duct 32c. Openings are respectively provided at positions corresponding to the first inflow portion 32a and the second inflow portion 32b of the top plate.

  The plurality of sprockets 32f include a driving sprocket and a driven sprocket. The drive sprocket is rotated by being connected to an electric motor (not shown) as a drive source. The driven sprocket is disposed along the orbit of the endless chain 32e, supports the endless chain 32e, and rotates in conjunction with the movement of the endless chain 32e. When the rotational driving force is transmitted from the electric motor and the driving sprocket is rotationally driven, the endless chain 32e and the flight 32d rotate along the circular path. The biomass-RPF transfer device 32 is a chain conveyor that is underlined, and a flight 32d disposed on the lower side moves in the transfer direction. The biomass that has flowed in from the first inflow portion 32a on the upstream side is scraped by the plurality of flights 32d and conveyed downstream, and the RPF that has flowed in from the second inflow portion 32b downstream is combined with the biomass by the plurality of flights 32d. It is scraped and conveyed downstream.

  The bottom plate on the other end side of the duct 32c is provided with a chute 32g for discharging the conveyed biomass and RPF. The biomass and RPF conveyed in the duct 32c pass through the chute 32g and are introduced into the solid fuel common conveyance unit 15.

  The solid fuel common transport unit 15 joins and transports coal, biomass, and RPF, and the solid fuel common first transport device 33, and solids that transport the coal, biomass, and RPF introduced from the solid fuel common first transport device 33. The fuel common second transport device 34, the solid fuel common chute 35 for dropping the coal, biomass and RPF transported by the solid fuel common second transport device 34, and the coal, biomass and RPF introduced through the solid fuel common chute 35 A solid fuel common third transport device 36 for transporting the fuel.

  The solid fuel common first transport device 33 is, for example, a screw conveyor, and as shown in FIG. 3, a duct 33 a that constitutes a solid fuel transport path, and a transport that transports the solid fuel disposed in the duct 33 a. A screw 33b and an electric motor 33c for rotationally driving the conveying screw 33b are provided.

  The first solid fuel common transport device 33 includes a first inflow portion 33d for allowing biomass-RPF to flow into the duct 33a, a second inflow portion 33e for allowing coal to flow into the duct 33a, Have

  The first inflow portion 33d is disposed on the upstream side which is one end side, and the second inflow portion 33e is disposed on the downstream side of the first inflow portion 33d. For example, the second inflow portion 33e is disposed at an intermediate portion in the transport direction of the solid fuel common first transport device 33. 33 d of 1st inflow parts and the 2nd inflow part 33e are provided in the top plate of the duct 32c, and the opening is provided in the position corresponding to a top plate, respectively.

  Moreover, the conveyance screw 33b is provided with the 1st screw part 33g arrange | positioned in the conveyance direction as shown in FIG. 4, and the 2nd screw part 33h arrange | positioned in the downstream. The first screw portion 33g has a first conveying blade 33i arranged in a spiral shape with respect to the rotation shaft 33f. The first conveying blade 33i is formed over the entire length in the radial direction. The second screw portion 33h is, for example, a ribbon screw, and has a second conveying blade 33j that is arranged continuously with the first conveying blade 33i. The second conveying blade 33j is arranged in a spiral shape with an opening region on the side of the rotation shaft 33f in the radial direction of the rotation shaft 33f. Further, the second conveying blade 33j is supported by a connecting rod 33k projecting in the radial direction from the rotating shaft 33f.

  The bottom plate on the other end side of the duct 33a is provided with a chute 33l for discharging the conveyed solid fuel. The solid fuel transported in the duct 33a passes through the chute 33l and is introduced into the solid fuel common second transport device 34.

  The solid fuel common second transport device 34 is, for example, a screw conveyor, and transports the solid fuel from one end side to the other end side. The conveyance screw of the solid fuel common second conveyance device 34 is, for example, a ribbon screw. A discharge port 34 a for discharging the transported solid fuel is provided at the bottom of the other end side of the solid fuel common second transport device 34. The solid fuel common second transport device 34 may be, for example, a chain conveyor or another transport device.

  The solid fuel common chute 35 extends in the vertical direction and connects the solid fuel common second transport device 34 and the solid fuel common third transport device 36. The upper end of the solid fuel common chute 35 is connected to the discharge port 34 a of the solid fuel common second transport device 34, and the lower end of the solid fuel common chute 35 is connected to one end of the solid fuel common third transport device 36. ing. The solid fuel dropped from the solid fuel common chute 35 is introduced into the solid fuel common third transport device 36.

  The solid fuel common third conveyance device 36 is, for example, a screw conveyor, and conveys the solid fuel from one end side to the other end side. The other end side of the solid fuel common third transport device 36 is connected to the fuel inlet 5 a of the furnace 5. The duct 36a and the conveyance screw 36b of the solid fuel common third conveyance device 36 are arranged to be inclined with respect to the horizontal direction. The duct 36a and the conveying screw 36b are disposed downward from the upstream side toward the downstream side. The solid fuel common third transport device 36 may be, for example, a chain conveyor or another transport device. The solid fuel common transport unit 15 may include a chute that connects the solid fuel common chute 35 and the fuel inlet 5a in place of the solid fuel common third transport device 36.

  The solid fuel transported by the solid fuel common third transport device 36 is supplied into the furnace 5 through the fuel inlet 5a.

  Further, as shown in FIG. 5, the fuel supply facility 3 includes a fuel supply control device 37 that controls the supply amount of the solid fuel to the furnace 5. The fuel supply control device 37 includes a required heat amount calculation unit 38, a biomass supply amount control unit 39, an RPF supply amount control unit 40, a coal supply amount control unit 41, a biomass-RPF supply amount control unit 42, and a solid fuel supply amount control unit 43. And a storage unit 44. The fuel supply control device 37 includes a central processing unit (CPU), a read only memory (ROM), a random access memory (RAM), an input signal circuit, an output signal circuit, and a power supply circuit.

  The fuel supply control device 37 is electrically connected to the input unit 45, the biomass receiving / conveying unit 11, the RPF receiving / conveying unit 12, the coal receiving / conveying unit 13, the biomass-RPF conveying unit 14, and the solid fuel common conveying unit 15. Has been.

  The input unit 45 inputs data necessary for control in the fuel supply control device 37. The input unit 45 is, for example, a keyboard used when an operator inputs data. The input unit 45 may be various sensors, for example. Examples of the various sensors include a temperature sensor for detecting the combustion state of the furnace 5 and a sensor for detecting information necessary for calculating the amount of steam generated by the circulating fluidized bed boiler 2. In addition, as various sensors, for example, a sensor that detects a storage amount of biomass stored in the biomass storage tank 16, a sensor that detects a storage amount of RPF stored in the RPF storage tank 21, and a coal storage tank 26. Examples include a sensor that detects the amount of coal stored, a sensor that detects a conveyance amount on a screw conveyor, and a sensor that detects a conveyance amount on a chain conveyor.

  The storage unit 44 stores data relating to the amount of heat of each solid fuel, data necessary for calculating the required amount of heat required in the furnace 5, data for determining the supply ratio of each solid fuel, and the like. In addition, the storage unit 44 stores data related to the transport capability of each transport device.

  The required heat amount calculation unit 38 calculates the required heat amount required in the furnace 5 based on the data input from the input unit 45 and the data stored in the storage unit 44. Further, the required heat amount calculation unit 38 determines the supply ratio of each solid fuel supplied to the furnace 5 based on the calculated required heat amount and the data stored in the storage unit 44, and the supply amount of each solid fuel. To decide. That is, the required calorific value calculation unit 38 is configured such that the biomass transport amount by the biomass transport unit 17, the RPF transport amount by the RPF transport unit 22, the coal transport amount by the coal transport unit 27, the biomass and RPF by the biomass-RPF transport unit 14. The total transport amount and the total transport amount of each solid fuel by the solid fuel common transport unit 15 are determined.

  The biomass supply amount control unit 39 controls the biomass receiving and conveying unit 11 so that the biomass conveyance amount determined by the required heat amount calculating unit 38 is obtained. Specifically, the biomass supply amount control unit 39 controls the rotational speed of the screw reclaimer 16 b of the biomass storage tank 16 to adjust the discharge amount of biomass discharged from the biomass storage tank 16. In addition, the biomass supply amount control unit 39 controls the number of rotations of the transport screw of the biomass transport device 19 to adjust the transport amount of biomass transported by the biomass transport device 19. The biomass supply amount control unit 39 controls the amount of biomass transported per unit time to be constant. Thereby, the supply amount of the biomass supplied to the biomass-RPF conveyance part 14 is made constant per unit time.

  The RPF supply amount control unit 40 controls the biomass receiving and conveying unit 11 so that the RPF conveyance amount determined by the required heat amount calculating unit 38 is obtained. Specifically, the RPF supply amount control unit 40 controls the rotational speed of the screw reclaimer 21 b of the RPF storage tank 21 to adjust the discharge amount of RPF discharged from the RPF storage tank 21. Further, the RPF supply amount control unit 40 controls the number of rotations of the transport screw of the RPF transport device 24 to adjust the transport amount of the RPF transported by the RPF transport device 24. The RPF supply amount control unit 40 performs control so that the transport amount of RPF per unit time is constant. Thereby, the supply amount of RPF supplied to the biomass-RPF conveyance part 14 is made constant per unit time.

  The coal supply amount control unit 41 controls the coal receiving and conveying unit 13 so that the coal conveyance amount determined by the required heat amount calculating unit 38 is obtained. Specifically, the coal supply amount control unit 41 controls the moving speed of the flight 28 b of the coal first transport device 28 to adjust the transport amount of coal transported by the coal first transport device 28. The coal supply amount control unit 41 controls the moving speed of the flight of the coal second transport device 30 to adjust the transport amount of coal transported by the coal second transport device 30. The coal supply amount control unit 41 performs control so that the amount of coal transport per unit time is constant. Thereby, the supply amount of coal supplied to the solid fuel common transport unit 15 is constant per unit time.

  The biomass-RPF supply amount control unit controls the biomass-RPF conveyance unit 14 so that the total conveyance amount of the biomass and the RPF determined by the required heat amount calculation unit 38 is obtained. Specifically, the biomass-RPF supply amount control unit controls the moving speed of the flight 32d of the biomass-RPF transport device 32, and determines the total transport amount of biomass and RPF transported by the biomass-RPF transport device 32. adjust. The biomass-RPF supply amount control unit performs control so that the total transport amount of biomass and RPF per unit time is constant. Thereby, the total supply amount of biomass and RPF supplied to the solid fuel common transport unit 15 is made constant per unit time.

  The solid fuel supply amount control unit 43 controls the solid fuel supply amount control unit 43 so that the total conveyance amount of each solid fuel determined by the required heat amount calculation unit 38 is obtained. Specifically, the solid fuel supply amount control unit 43 controls the number of rotations of the conveyance screw 33b of the solid fuel common first conveyance device 33, so that each solid fuel conveyed by the solid fuel common first conveyance device 33 is controlled. Adjust the total transport amount. The solid fuel supply amount control unit 43 controls the number of rotations of the conveyance screw of the solid fuel common second conveyance device 34 to adjust the total conveyance amount of each solid fuel conveyed by the solid fuel common second conveyance device 34. To do. The solid fuel supply amount control unit 43 controls the number of rotations of the conveyance screw 36b of the solid fuel common third conveyance device 36, and determines the total conveyance amount of each solid fuel conveyed by the solid fuel common third conveyance device 36. adjust. The solid fuel supply amount control unit 43 performs control so that the total transport amount of each solid fuel per unit time is constant. Thereby, the solid fuel supply amount control unit 43 makes the total supply amount of each solid fuel supplied to the furnace 5 constant per unit time.

  Next, a processing procedure in the fuel supply control device 37 will be described with reference to FIG. First, the required heat amount calculation unit 38 of the fuel supply control device 37 inputs various data from the input unit 45 (step S1). The required heat amount calculation unit 38 inputs, for example, data relating to the combustion temperature in the furnace 5 and the amount of steam generated in the boiler as various data. Further, the required heat amount calculation unit 38 may input data relating to the current supply amount of each solid fuel. Further, the required heat quantity calculation unit 38 may input information regarding the operating conditions of the biomass transport unit 17, the RPF transport unit 22, the coal transport unit 27, the biomass-RPF transport unit 14, and the solid fuel common transport unit 15. Examples of the information related to the operating conditions include information such as operating the coal conveyance unit 27 and stopping the biomass conveyance unit 17 and the RPF conveyance unit 22.

  Next, the required heat quantity calculation part 38 calculates the required heat quantity in the furnace 5 based on the various data input from the input part 45 and the data memorize | stored in the memory | storage part 44 (step S2). The required heat amount calculation unit 38 may calculate the heat amount required in the furnace 5 in order to realize the required steam generation amount. The required heat amount calculation unit 38 refers to the heat amount of each solid fuel based on the data stored in the storage unit 44, determines the supply ratio of each solid fuel, and determines the supply amount of each solid fuel. Thereby, the conveyance amount of each solid fuel conveyed by the biomass conveyance part 17, the RPF conveyance part 22, the coal conveyance part 27, the biomass-RPF conveyance part 14, and the solid fuel common conveyance part 15 is determined.

  Next, the fuel supply control device 37 has a biomass receiving / conveying unit 11, an RPF receiving / conveying unit 12, a coal receiving / conveying unit 13, and a biomass-RPF conveying unit so that the amount of each solid fuel determined in step S3 is reached. 14 and the solid fuel common transport unit 15 are controlled (step S4).

  In step S4, the fuel supply control device 37 executes the following steps S5 to S9. In step S <b> 5, the biomass supply amount control unit 39 controls the biomass conveyance amount by the biomass conveyance unit 17. The biomass supply amount control unit 39 transmits a command signal to the biomass receiving and conveying unit 11 to control each electric motor, and the rotation speed of the screw reclaimer 16b of the biomass storage tank 16 and the conveying screw of the biomass conveying device 19. Control the number of revolutions. The biomass supply amount control unit 39 controls the biomass conveyance unit 17 so that the biomass conveyance amount per unit time is constant.

  In step S <b> 6, the RPF supply amount control unit 40 controls the amount of RPF transport by the RPF transport unit 22. The RPF supply amount control unit 40 transmits a command signal to the RPF receiving conveyance unit 12 to control each electric motor, and the number of rotations of the screw reclaimer 21b of the RPF storage tank 21 and the conveyance screw of the RPF conveyance device 24. Control the number of revolutions. The RPF supply amount control unit 40 controls the RPF transport unit 22 so that the transport amount of RPF per unit time is constant.

  In step S <b> 7, the coal supply amount control unit 41 controls the coal conveyance amount by the coal conveyance unit 27. The coal supply amount control unit 41 transmits a command signal to the coal receiving conveyance unit 13 to control each electric motor, and the movement speed of the flight 28b of the coal first conveyance device 28 and the coal second conveyance device 30. Control the flight speed. The coal supply amount control unit 41 controls the coal conveyance unit 27 so that the coal conveyance amount per unit time is constant.

  In step S <b> 8, the biomass-RPF supply amount control unit 42 controls the total transport amount of biomass and RPF by the biomass-RPF transport unit 14. The biomass-RPF supply amount control unit transmits a command signal to the biomass-RPF transport unit 14 and controls the electric motor to control the moving speed of the flight 32d of the biomass-RPF transport device 32. The biomass-RPF supply amount control unit 42 controls the biomass-RPF conveyance unit 14 so as to make the total conveyance amount of biomass and RPF per unit time constant.

  In step S <b> 9, the solid fuel supply amount control unit 43 controls the total transport amount of each solid fuel by the solid fuel common transport unit 15. The solid fuel supply amount control unit 43 transmits a command signal to the solid fuel common conveyance unit 15 to control each electric motor, and the number of rotations of the conveyance screw 33b of the solid fuel common first conveyance device 33, common to the solid fuel The number of rotations of the conveyance screw of the second conveyance device 34 and the number of rotations of the conveyance screw 36b of the solid fuel common third conveyance device 36 are controlled. The solid fuel supply amount control unit 43 controls the solid fuel common conveyance unit 15 so as to make the total conveyance amount of each solid fuel per unit time constant.

  Next, the operation of the fuel supply facility 3 of the fluidized bed combustion facility 1 will be described. In the fuel supply facility 3, a plurality of types of solid fuels are transported based on the supply amount of each solid fuel determined by the fuel supply control device 37.

  The biomass stored in the biomass storage tank 16 is introduced into the biomass chute 18 after the discharge amount is controlled. The biomass that has passed through the biomass chute 18 is supplied to the biomass transfer device 19. The biomass supplied to the biomass transfer device 19 is transferred so that the transfer amount per unit time is constant, passes through the biomass chute 20, and is supplied to the biomass-RPF transfer device 32.

  The discharge amount of the RPF stored in the RPF storage tank 21 is controlled and introduced into the RPF chute 23. The RPF that has passed through the RPF chute 23 is supplied to the RPF transport device 24. The RPF supplied to the RPF transfer device 24 is transferred so that the transfer amount per unit time is constant, passes through the RPF chute 25, and is supplied to the biomass-RPF transfer device 32.

  The amount of coal stored in the coal storage tank 26 is controlled and supplied to the first coal conveying device 28. The coal supplied to the first coal transport device 28 is transported so that the transport amount per unit time is constant, passes through the first coal chute 29, and is supplied to the second coal transport device 30. The coal supplied to the second coal transport device 30 is transported so that the transport amount per unit time is constant, passes through the second coal chute 31, and is supplied to the solid fuel common first transport device 33.

  In the biomass-RPF transport device 32, biomass is introduced from the first inflow portion 32a on the upstream side, and RPF is introduced from the second inflow portion 32b downstream from the first inflow portion 32a. The biomass introduced to the upstream side is conveyed downstream by the biomass-RPF conveyance device 32 and merges with the RPF introduced from the second inflow portion 32b. The biomass is transported together with the RPF downstream of the second inflow portion 32b. The biomass and RPF are transported by the biomass-RPF transport device 32 so that the transport amount per unit time is constant, and supplied to the solid fuel common first transport device 33.

  In the solid fuel common first transport device 33, biomass and RPF are introduced from the first inflow portion 33d on the upstream side, and coal is introduced from the second inflow portion 33e downstream from the first inflow portion 33d. The biomass and RPF introduced to the upstream side are conveyed downstream by the solid fuel common first conveying device 33, and merge with the coal introduced from the second inflow portion 33e. At the downstream of the second inflow portion 33e, the biomass and RPF are transported together with coal. At this time, even if the coal that is the solid fuel with higher adhesion adheres to the inner surface of the duct 33a and the conveyance screw 33b of the solid fuel common first transport device 33, the biomass that is the solid fuel with higher wear resistance Alternatively, the RPF strikes the adhering coal and scrapes off the coal. Thereby, it is possible to prevent coal from adhering to the inside of the solid fuel common first transport device 33. Biomass, RPF, and coal are transported by the solid fuel common first transport device 33 so that the transport amount per unit time is constant and supplied to the solid fuel common second transport device 34.

  The biomass, RPF, and coal are transported by the solid fuel common second transport device 34 so that the transport amount per unit time is constant, pass through the solid fuel common chute 35, and pass through the solid fuel common third transport device 36. To be supplied. Even in the solid fuel common second conveyance device 34 and the solid fuel common chute 35, even if coal adheres, the biomass or RPF hits the adhering coal and scrapes off the coal. Thereby, it is possible to prevent the coal from adhering to the inside of the solid fuel common second transport device 34 and the solid fuel common chute 35.

  Biomass, RPF, and coal are transported by the solid fuel common third transport device 36 so that the transport amount per unit time is constant, and are supplied into the furnace 5 through the fuel inlet 5a. Even in the solid fuel common third transport device 36, even if the coal adheres, the biomass or the RPF hits the adhering coal and scrapes off the coal. Thereby, it can prevent that coal adheres to the solid fuel common 3rd conveying apparatus 36. FIG.

  As described above, in the fuel supply facility 3 according to the present embodiment, even when highly adherent coal adheres to the wall surface forming the flow path, the biomass and RPF that have flowed from the upstream hit the coal and scrape off. Become. Therefore, it is possible to suppress the adhesion of coal, maintain the transport amount of plural types of solid fuel, and stably supply the solid fuel to the furnace 5. As a result, the combustion state in the furnace 5 can be maintained satisfactorily. Moreover, since adhesion of coal is suppressed, there is no possibility of clogging solid fuel in the flow path. As a result, maintenance work such as stopping the apparatus and removing the adhering coal is reduced, and long-term continuous operation of the apparatus can be realized.

  Further, in the fuel supply facility 3, the supply amount of biomass and RPF to the solid fuel common first transfer device 33 is constant per unit time, and the supply amount of coal to the solid fuel common first transfer device 33 is set to the unit time. A certain amount per hit. Thereby, since the total supply amount of biomass and RPF supplied to the solid fuel common first transport device 33 and the supply amount of coal can be made constant per unit time, the solid fuel common first By restricting the supply amounts of a plurality of types of solid fuel flowing into the transport device 33, it is possible to suppress the adhesion of coal and stably transport the solid fuel.

  Further, the fuel supply facility 3 controls the supply amounts of a plurality of types of solid fuel supplied to the furnace 5 based on the required heat quantity that is the heat quantity required in the furnace 5. Thereby, the combustion state of the furnace 5 can be stabilized.

  The solid fuel common first transport device 33 has a second transport blade 33j that is a ribbon screw downstream of the second inflow portion 33e. For example, when only coal is transported and biomass and RPF are not transported depending on operating conditions, etc., a part of the coal passes through the opening region and moves downstream in the transport direction. The amount of coal in contact can be reduced, and the amount of coal adhering to the second conveying blade 33j can be reduced.

  In addition, according to the fuel supply facility 3, a plurality of types of solid fuel can be merged and put into the furnace 5, so that it is not necessary to provide a fuel inlet for each type of fuel, and the furnace 5 can be downsized. In addition, the number of equipment and the installation space of the transport facility can be reduced. Further, depending on the size of the furnace 5, when a plurality of fuel input ports cannot be provided, a plurality of types of solid fuel can be input only by providing one fuel input port. First, a plurality of types of solid fuel can be introduced.

  The present invention is not limited to the above-described embodiments, and various modifications as described below are possible without departing from the gist of the present invention.

  In the above embodiment, biomass, RPF, and coal are allowed to flow into the solid fuel common first transport device 33. For example, in the configuration including a plurality of transport devices, the upstream solid fuel common first transport device is provided. A configuration may be adopted in which biomass and RPF are introduced into 33 and coal is introduced into the downstream solid fuel common second transport device 34. As a result, the solid fuel with lower adhesion can be introduced into the upstream side, and the solid fuel with higher adhesion can be introduced into the downstream side.

  Further, for example, the solid fuel with lower adhesion may be flowed into the upstream side of the chute 35 and the solid fuel with high adhesion may be flowed into the downstream thereof. A plurality of types of solid fuel may be allowed to flow into the chute that is the transport unit.

  Moreover, in the said embodiment, although the circulating fluidized bed boiler is illustrated as a combustion furnace, another boiler may be sufficient and a waste incinerator etc. may be sufficient.

  Moreover, in the said embodiment, although biomass, RPF, and coal are conveyed, the multiple types of solid fuel conveyed by the solid fuel common conveyance part 15 is not limited to these, For example, paper sludge, TDF, Other solid fuels such as EFB, rice husk, and PKS may be introduced. Among these, the paper sludge corresponds to a solid fuel having a higher adhesion, and the remaining TDF, EFB, rice husk, PKS, and the like correspond to a fuel having a lower adhesion. Two or more types of solid fuel may be conveyed.

  Further, when transporting three or more types of solid fuel, the first inflow portion into which the fuel having the lowest adhesion among the plurality of solid fuels flows is arranged upstream, and the most adhesion among the plurality of solid fuels. It is preferable to arrange the second inflow portion into which the high fuel flows in the most downstream. In this case, since the first inflow portion that flows in the solid fuel having the lowest adhesion is disposed at the most upstream, even if the solid fuel that has flowed in downstream is temporarily attached to the inside of the apparatus, The first solid fuel conveyed from the side hits the solid fuel adhering to the inside of the apparatus, and the solid fuel is scraped off. Therefore, the amount of solid fuel adhering to the inside of the apparatus can be reduced. Further, according to this configuration, since the second inflow portion into which the most adherent solid fuel flows is arranged on the most downstream side, even if the second solid fuel is temporarily adhered to the inside of the apparatus, The solid fuel conveyed from the upstream side hits the second solid fuel adhering to the inside of the apparatus, and the second solid fuel is scraped off. Therefore, the amount of the second solid fuel that adheres to the inside of the apparatus can be reduced. When transporting four or more types of solid fuel, it is preferable that the solid fuel with lower adhesion flows from the upstream side, and the solid fuel with higher adhesion flows from the downstream side.

  Further, the second inflow portion may be configured to allow the second solid fuel to flow into a position where the first solid fuel passes. According to this configuration, the first solid fuel can be passed through the position where the second solid fuel flows. Therefore, even if the second solid fuel is temporarily attached to the inside of the apparatus, the first solid fuel is reliably supplied to the position where the second solid fuel is attached to suppress the attachment of the second solid fuel. can do. In addition, for example, in a transport device that is a belt conveyor, when the second solid fuel is dropped and introduced from above the transport belt, the first solid fuel passes through the position where the second solid fuel falls. The first solid fuel can be transported. Therefore, the second solid fuel can be dropped on the first solid fuel, and the adhesion of the second solid fuel to the conveyance belt can be suppressed. Moreover, also in other conveying apparatuses, adhesion of the second solid fuel to the conveying apparatus can be suppressed by conveying the first solid fuel so as to pass through the position where the second solid fuel flows.

  Moreover, in the said embodiment, although it is set as the structure provided with the 2nd conveyance blade | wing 33j which is a ribbon screw in the solid fuel common 1st conveying apparatus 33 downstream from the 2nd inflow part 33e, in the downstream of the 2nd inflow part 33e. A conveying blade having the same configuration as that of the first conveying blade 33i may be disposed. Further, a ribbon screw may be arranged upstream of the second inflow portion 33e.

  Moreover, in the said embodiment, after conveying the coal stored in the coal storage tank 26 using the coal conveyance part 27, coal is made to flow into the solid fuel common 1st conveying apparatus 33, but the coal conveyance part 27 is carried out. For example, the solid fuel common first conveyance device 33 may be directly introduced into the coal discharged from the coal storage tank 26 without using the fuel. In this case, the point where the coal is introduced is the second inflow portion. The 2nd inflow part should just be arranged downstream of the 1st inflow part which is the point where the 1st solid fuel which is the solid fuel with the lower adhesion nature inflow direction in the conveyance direction of the solid fuel. Similarly, biomass and RPF may be directly flowed from the storage tank into the solid fuel common first transfer device 33.

  DESCRIPTION OF SYMBOLS 1 ... Fluidized bed combustion equipment, 2 ... Circulating fluidized bed boiler, 3 ... Fuel supply equipment, 5 ... Furnace, 11 ... Biomass receiving conveyance part (1st fixed supply part), 12 ... RPF receiving conveyance part (1st fixed supply) Part), 13 ... Coal receiving and conveying part (second fixed amount supplying part), 14 ... Biomass-RPF conveying part (first fixed amount supplying part), 15 ... Solid fuel common conveying part (conveying part), 33 ... Solid fuel common number 1 conveying device, 33d ... first inflow portion, 33e ... second inflow portion, 37 ... fuel supply control device (control portion), 33f ... rotary shaft, 33g ... first screw portion, 33h ... second screw portion, 33i ... 1st conveyance blade | wing, 33j ... 2nd conveyance blade | wing.

Claims (6)

A transport device that collects a plurality of types of solid fuels having different adhesion properties and throws them into a combustion furnace,
A transport unit for transporting the solid fuel;
A first inflow portion for causing the first solid fuel, which is the solid fuel having the lower adhesion among the plurality of types of the solid fuel, to flow into the transport portion;
A second inflow that causes the second solid fuel, which is the solid fuel having higher adhesion than the first solid fuel among the plurality of types of the solid fuel, to flow into the transport unit downstream of the first inflow unit. And comprising
Wherein the second solid fuel adhering to the transport unit, the have the second merge into solid fuel, scraped off by the is from wear highly the first solid fuel second solid fuel strikes, transport device. When transporting three or more types of the solid fuel as the plurality of types of the solid fuel,
The solid fuel having the lowest adhesion among the three or more types of the solid fuel flows as the first solid fuel from the first inflow portion,
The solid fuel having the highest adhesion among the three or more types of the solid fuel, as the second solid fuel, flows from the second inflow portion,
The first inflow portion is disposed upstream of a plurality of inflow portions that flow the solid fuel into the transport portion,
The said 2nd inflow part is a conveying apparatus of Claim 1 arrange | positioned most downstream among the said some inflow parts which flow in the said solid fuel into the said conveyance part.   The transfer device according to claim 1 or 2, wherein the second inflow portion causes the second solid fuel to flow into a position where the first solid fuel passes. A first fixed supply unit that sets a supply amount of the first solid fuel to the transport unit to be a constant amount per unit time;
The conveying apparatus as described in any one of Claims 1-3 further equipped with the 2nd fixed supply part which makes the supply amount to the said conveyance part of the said 2nd solid fuel the fixed quantity per unit time.   The supply amount of the first solid fuel by the first fixed amount supply unit and the supply amount of the second solid fuel by the second fixed amount supply unit are controlled based on a required heat amount that is a heat amount required in the combustion furnace. The transport apparatus according to claim 4, further comprising a control unit. The transport unit is
A first screw part having a first conveying blade arranged in a spiral with respect to the rotation axis;
A second screw part disposed downstream of the first screw part in the axial direction of the rotary shaft,
The second screw part has a second conveying blade arranged in a spiral form forming an opening region on the rotary shaft side in the radial direction,
The said 2nd conveyance blade is a conveying apparatus as described in any one of Claims 1-5 arrange | positioned downstream of the said 2nd inflow part.

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