WO2016158360A1 - Conveyance apparatus - Google Patents
Conveyance apparatus Download PDFInfo
- Publication number
- WO2016158360A1 WO2016158360A1 PCT/JP2016/058025 JP2016058025W WO2016158360A1 WO 2016158360 A1 WO2016158360 A1 WO 2016158360A1 JP 2016058025 W JP2016058025 W JP 2016058025W WO 2016158360 A1 WO2016158360 A1 WO 2016158360A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- solid fuel
- biomass
- rpf
- transport
- coal
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G65/00—Loading or unloading
- B65G65/30—Methods or devices for filling or emptying bunkers, hoppers, tanks, or like containers, of interest apart from their use in particular chemical or physical processes or their application in particular machines, e.g. not covered by a single other subclass
- B65G65/34—Emptying devices
- B65G65/40—Devices for emptying otherwise than from the top
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/18—Details; Accessories
- F23C10/22—Fuel feeders specially adapted for fluidised bed combustion apparatus
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G65/00—Loading or unloading
- B65G65/30—Methods or devices for filling or emptying bunkers, hoppers, tanks, or like containers, of interest apart from their use in particular chemical or physical processes or their application in particular machines, e.g. not covered by a single other subclass
- B65G65/34—Emptying devices
- B65G65/40—Devices for emptying otherwise than from the top
- B65G65/46—Devices for emptying otherwise than from the top using screw conveyors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/30—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having a fluidised bed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
- F23G5/442—Waste feed arrangements
- F23G5/444—Waste feed arrangements for solid waste
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
- F23K3/06—Feeding or distributing of lump or pulverulent fuel to combustion apparatus for shaft-type furnaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
- F23K3/16—Over-feed arrangements
Definitions
- the present invention relates to a transport device for transporting solid fuel.
- a fluidized bed furnace combustion furnace
- a plurality of types of objects to be processed are introduced as fuel combusted in the furnace (see, for example, Patent Document 1).
- solid materials such as waste plastic and waste wood are charged into the furnace as fuel (solid fuel).
- solid fuel are transported by a single system transport device for each type, and charged into the furnace through different inlets.
- a transport device is 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 plurality of types of solid fuels.
- the first solid fuel which is the solid fuel with the lower adhesion, out of the first inflow part that flows into the transport unit, and the solid fuel with the higher adhesion than the first solid fuel among the plurality of types of solid fuels.
- a second inflow portion for allowing the two solid fuel to flow into the transport portion downstream from the first inflow portion.
- the first solid fuel having the lower adhesion property flows into the transport section from the first inflow section on the upstream side.
- the second solid fuel having the higher adhesion is flowing into the transport unit from the second inflow portion disposed downstream of the first inflow portion. Therefore, even if the second solid fuel flowing in from the second inflow portion temporarily adheres to the inside of the apparatus, the first solid fuel transported from the upstream side adheres to the inside of the apparatus. In this case, 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.
- 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.
- 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.
- the 1st inflow part which flows in the solid fuel with the lowest adhesion is arrange
- the solid fuel conveyed from the upstream side hits the second solid fuel attached to the inside of the apparatus and scrapes the second solid fuel. It will be. Therefore, the amount of the second solid fuel that adheres to the inside of the apparatus can be reduced.
- 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.
- 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.
- 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. Therefore, the supply amount of the first solid fuel and the second solid fuel flowing into the transfer device is limited, and the increase in the amount of solid fuel adhering to the inside of the device is suppressed, so that the solid fuel is stably transferred. can do.
- 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.
- 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.
- positioned may be sufficient.
- region formed in the axial center side is provided downstream of the 2nd inflow part into which a 2nd solid fuel flows in. Accordingly, a part of the second solid fuel passes through the opening region 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.
- the amount of solid fuel adhering to the inside of the apparatus can be reduced, and the solid fuel can be stably conveyed.
- FIG. 1 is a schematic view showing a fluidized bed combustion facility according to an embodiment of the present invention.
- FIG. 2 is a schematic view showing a fuel supply facility for charging solid fuel into the furnace shown in FIG.
- FIG. 3 is a schematic view showing the solid fuel common first transfer device in FIG. 2.
- FIG. 4 is a side view showing a screw conveyor which is a solid fuel common first transfer device.
- FIG. 5 is a block diagram showing the fuel supply control device.
- FIG. 6 is a flowchart showing a processing procedure in the fuel supply control device.
- 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.
- 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 (Phusk), 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. The lower end of the return line 8 is connected to the furnace 5 through the lower side surface 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 through which exhaust gas is circulated.
- 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.
- 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.
- produced with the boiler is not limited to electric power generation, You may use water vapor
- 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.
- adhesion 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.
- 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.
- the screw reclaimer 16b for conveying the biomass deposited on the bottom part and introducing it into the discharge port 16a is provided at the bottom of the biomass storage tank 16.
- 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.
- 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 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 transport device 19 is, for example, a screw conveyor, and transports 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 of the downstream biomass chute 20 is connected to the discharge port 19 a of the biomass transfer device 19.
- the lower end of the biomass chute 20 is connected to the biomass-RPF transport unit 14.
- the biomass dropped from the biomass chute 20 is introduced into the biomass-RPF transport unit 14.
- the RPF receiving / 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.
- a screw reclaimer 21b is provided at the bottom of the RPF storage tank 21 for transporting the RPF accumulated on the bottom and introducing it into the discharge port 21a.
- 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.
- 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 of the upstream RPF chute 23 is connected to the outlet 21 a of the RPF storage tank 21.
- a 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 transport device 24 is, for example, a screw conveyor, and transports 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 outlet 24 a of the RPF transport device 24.
- the lower end portion 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
- the first coal conveying device 28 has, for example, a belt conveyor and a chain conveyor, and conveys coal from one end side to the other end side.
- a belt conveyor is arranged at the upper stage
- 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.
- the endless belt rotates along the circular path.
- 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.
- the chain conveyor includes a plurality of flights 28b that scrapes and conveys coal powder, an endless chain 28c that supports the plurality of flights 28b at a predetermined interval, and a plurality of sprockets 28d around which the 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.
- the endless belt rotates along the circular path.
- 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.
- 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.
- a lower end portion of the first coal chute 29 is connected to one end side of the second coal transport 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 coal second chute 31 is connected to the discharge port 30 a of the coal second transport device 30.
- the lower end portion of the second coal chute 31 is connected to the solid fuel common transport unit 15. The coal that has dropped the second coal chute is introduced into the solid fuel common transport unit 15.
- the biomass-RPF transport unit 14 includes a biomass-RPF transport device 32 that transports the biomass and RPF together.
- 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 second inflow portion 32b is disposed at an intermediate portion in the transport direction of the biomass-RPF transport device 32.
- the biomass-RPF transfer device 32 is, for example, a chain conveyor.
- the biomass-RPF transport device 32 includes a duct 32c that constitutes a transport path of biomass-RPF, a plurality of flights 32d that are arranged in the duct 32c and transport the biomass and RPF by scraping them, and a plurality of flights 32d that are arranged in a predetermined manner.
- 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.
- the endless chain 32e and the flight 32d rotate along the circular path.
- the biomass-RPF transport device 32 is a chain conveyor for lowering, and a flight 32d disposed on the lower side moves in the transport direction.
- Biomass that has flowed in from the first inflow portion 32a on the upstream side is scraped by a plurality of flights 32d and conveyed downstream.
- the RPF that has flowed in from the downstream second inflow portion 32b is scraped together with the biomass by a plurality of flights 32d and conveyed downstream.
- a chute 32g for discharging the conveyed biomass and RPF is provided on the bottom plate on the other end side of the duct 32c.
- 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 solid fuel common first transfer 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.
- 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.
- the conveying screw 33b includes a first screw portion 33g arranged on the upstream side and a second screw portion 33h arranged on the downstream side in the conveying direction.
- 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.
- a chute 33l for discharging the transported solid fuel is provided on the bottom plate on the other end side of the duct 33a.
- 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 portion of the solid fuel common chute 35 is connected to the discharge port 34 a of the solid fuel common second transport device 34.
- a lower end portion of the solid fuel common chute 35 is connected to one end side of the solid fuel common third transfer device 36.
- 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 transport device 36 is, for example, a screw conveyor, and transports 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.
- Solid fuel transported by the solid fuel common third transport device 36 is supplied into the furnace 5 through the fuel inlet 5a.
- 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 CPU [Central Processing Unit], ROM [Read Only Memory], RAM [Random Access Memory], an input signal circuit, an output signal circuit, a power supply circuit, and the like.
- 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.
- 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 heat amount calculation unit 38 is configured to transfer the biomass transported by the biomass transport unit 17, the transported amount of RPF by the RPF transport unit 22, the transported amount of coal by the coal transport unit 27, and 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 as to be the biomass conveyance amount determined by the required heat amount calculating unit 38. 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 biomass supplied to the biomass-RPF transport unit 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 transport unit 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 biomass and 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 controls the total transport amount of biomass and RPF per unit time to be 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.
- 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 transfer unit 17, the RPF transfer unit 22, the coal transfer unit 27, the biomass-RPF transfer unit 14, and the solid fuel common transfer 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.
- the required heat amount calculation unit 38 calculates the required heat amount in the furnace 5 based on the various data input from the input unit 45 and the data stored in the storage unit 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 transport amount of each solid fuel transported by 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 is determined.
- the fuel supply control device 37 sets the biomass receiving / conveying section 11, the RPF receiving / conveying section 12, the coal receiving / conveying section 13, and the biomass-RPF conveying section 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).
- step S4 the fuel supply control device 37 executes the following steps S5 to S9.
- 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.
- step S ⁇ b> 6 the RPF supply amount control unit 40 controls the amount of RPF transported 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.
- 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.
- step S8 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 that the total conveyance amount of biomass and RPF per unit time is constant.
- step S9 the solid fuel supply amount control unit 43 controls the total conveyance amount of each solid fuel by the solid fuel common conveyance 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.
- the operation of the fuel supply facility 3 of the fluidized bed combustion facility 1 will be described.
- 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.
- 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 upstream is transported downstream by the biomass-RPF transport 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.
- 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.
- the biomass and RPF are transported together with coal.
- 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. 1 shows a solid fuel common 3rd conveying apparatus 36.
- 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.
- 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, the total supply amount of biomass and RPF supplied to the solid fuel common first transfer device 33 and the supply amount of coal can be set to a constant amount per unit time. Accordingly, the supply amount of the plurality of types of solid fuel flowing into the solid fuel common first transport device 33 is limited to suppress the adhesion of coal, so that the solid fuel can be transported stably.
- 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 amount that is the heat amount 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.
- a second transport blade 33j that is a ribbon screw downstream of the second inflow portion 33e.
- 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.
- biomass, RPF, and coal are allowed to flow into the solid fuel common first transfer device 33.
- biomass and RPF are introduced into the upstream solid fuel common first transfer device 33 and coal is introduced into the downstream solid fuel common second transfer device 34.
- 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.
- 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.
- the circulating fluidized bed boiler is exemplified as the combustion furnace.
- other boilers such as a waste incinerator may be used.
- the multiple types of solid fuel conveyed by the solid fuel common conveyance part 15 is not limited to these,
- paper sludge, TDF, Other solid fuels such as EFB, rice husk, and PKS may be introduced.
- the paper sludge corresponds to a solid fuel having a higher adhesion
- 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.
- 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.
- 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.
- the 2nd inflow part which flows in solid fuel with the highest adhesion is arrange
- the second inflow portion may be configured to allow the second solid fuel to flow into a position where the first solid fuel passes.
- 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.
- a transport device that is a belt conveyor
- the first solid fuel passes through the position where the second solid fuel falls. The first solid fuel can be transported.
- 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.
- 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.
- 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.
- a ribbon screw may be arranged upstream of the second inflow portion 33e.
- the solid fuel common first transport device 33 may be directly introduced into the coal discharged from the coal storage tank 26 without using the coal transport unit 27, for example.
- 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.
- biomass and RPF may be directly flowed from the storage tank into the solid fuel common first transfer device 33.
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Environmental & Geological Engineering (AREA)
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Abstract
Description
Claims (6)
- 付着性の異なる複数種類の固形燃料を集合させて燃焼炉に投入する搬送装置であって、
前記固形燃料を搬送する搬送部と、
前記複数種類の前記固形燃料のうち付着性が低い方の前記固形燃料である第1固形燃料を、前記搬送部に流入させる第1流入部と、
前記複数種類の前記固形燃料のうち前記第1固形燃料よりも付着性が高い前記固形燃料である第2固形燃料を、前記第1流入部よりも下流で、前記搬送部に流入させる第2流入部と、を備える搬送装置。 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. A conveying device. - 前記複数種類の前記固形燃料として、3種類以上の前記固形燃料を搬送する場合において、
前記3種類以上の前記固形燃料のうち付着性が最も低い前記固形燃料を、前記第1固形燃料として、前記第1流入部から流入し、
前記3種類以上の前記固形燃料のうち付着性が最も高い前記固形燃料を、前記第2固形燃料として、前記第2流入部から流入し、
前記第1流入部は、前記固形燃料を前記搬送部に流入する複数の流入部のうち、最も上流に配置され、
前記第2流入部は、前記固形燃料を前記搬送部に流入する複数の前記流入部のうち、最も下流に配置されている請求項1に記載の搬送装置。 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. - 前記第2流入部は、前記第1固形燃料が通過する位置に、前記第2固形燃料を流入させる請求項1又は2に記載の搬送装置。 The transfer device according to claim 1 or 2, wherein the second inflow portion allows the second solid fuel to flow into a position through which the first solid fuel passes.
- 前記第1固形燃料の前記搬送部への供給量を、単位時間当たり一定量とする第1定量供給部と、
前記第2固形燃料の前記搬送部への供給量を、単位時間当たり一定量とする第2定量供給部と、を更に備える請求項1~3の何れか一項に記載の搬送装置。 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 transfer apparatus according to any one of claims 1 to 3, further comprising a second fixed amount supply unit that sets a supply amount of the second solid fuel to the transfer unit at a constant amount per unit time. - 前記燃焼炉において要求される熱量である要求熱量に基づいて、前記第1定量供給部による前記第1固形燃料の供給量、及び前記第2定量供給部による前記第2固形燃料の供給量を制御する制御部を更に備える請求項4に記載の搬送装置。 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.
- 前記搬送部は、
回転軸に対してらせん状に配置された第1搬送羽根を有する第1スクリュー部と、
前記回転軸の軸線方向において、前記第1スクリュー部の下流に配置された第2スクリュー部と、を備え、
前記第2スクリュー部は、径方向において前記回転軸側に開口領域を形成してらせん状に配置された第2搬送羽根を有し、
前記第2搬送羽根は、前記第2流入部の下流に配置されている請求項1~5の何れか一項に記載の搬送装置。 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 transport apparatus according to any one of claims 1 to 5, wherein the second transport blade is disposed downstream of the second inflow portion.
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PH12017501712A PH12017501712A1 (en) | 2015-03-30 | 2017-09-19 | Conveyance apparatus |
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2015
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2016
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JP2002333116A (en) * | 2001-05-08 | 2002-11-22 | Sumitomo Heavy Ind Ltd | Refuse-feeding method and device |
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JP2015161048A (en) * | 2014-02-28 | 2015-09-07 | セイコーエプソン株式会社 | Sheet production apparatus |
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PH12017501712A1 (en) | 2018-03-19 |
JP6453137B2 (en) | 2019-01-16 |
KR20170131410A (en) | 2017-11-29 |
JP2016188743A (en) | 2016-11-04 |
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