WO2022102296A1 - バイオマス固体燃料製造装置 - Google Patents
バイオマス固体燃料製造装置 Download PDFInfo
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- WO2022102296A1 WO2022102296A1 PCT/JP2021/037171 JP2021037171W WO2022102296A1 WO 2022102296 A1 WO2022102296 A1 WO 2022102296A1 JP 2021037171 W JP2021037171 W JP 2021037171W WO 2022102296 A1 WO2022102296 A1 WO 2022102296A1
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- Prior art keywords
- biomass
- inert gas
- kiln
- solid fuel
- nozzle
- Prior art date
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- 239000002028 Biomass Substances 0.000 title claims abstract description 107
- 239000004449 solid propellant Substances 0.000 title claims abstract description 47
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 30
- 239000011261 inert gas Substances 0.000 claims abstract description 69
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 43
- 239000002994 raw material Substances 0.000 claims abstract description 35
- 238000000465 moulding Methods 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims description 40
- 238000010000 carbonizing Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 39
- 238000009833 condensation Methods 0.000 description 11
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- 238000003763 carbonization Methods 0.000 description 10
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- 241000218657 Picea Species 0.000 description 5
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- 229910052760 oxygen Inorganic materials 0.000 description 5
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- 240000007472 Leucaena leucocephala Species 0.000 description 4
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- 238000001816 cooling Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
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- 229910052799 carbon Inorganic materials 0.000 description 3
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- 239000000126 substance Substances 0.000 description 2
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Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B47/00—Destructive distillation of solid carbonaceous materials with indirect heating, e.g. by external combustion
- C10B47/28—Other processes
- C10B47/30—Other processes in rotary ovens or retorts
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
- C10B53/02—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of cellulose-containing material
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
- C10B53/08—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form in the form of briquettes, lumps and the like
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/40—Solid fuels essentially based on materials of non-mineral origin
- C10L5/44—Solid fuels essentially based on materials of non-mineral origin on vegetable substances
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/08—Rotary-drum furnaces, i.e. horizontal or slightly inclined externally heated
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
- F27B7/36—Arrangements of air or gas supply devices
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Definitions
- This disclosure relates to biomass solid fuel production equipment.
- Patent Document 1 discloses a configuration in which an inert gas is introduced into a dust feeder for supplying waste to a rotary kiln furnace in a waste pyrolysis gasifier to perform purging. ..
- the biomass molding When a biomass molded body is heated using the apparatus described in Patent Document 1 to produce a biomass solid fuel, the biomass molding may be disrupted by steam generated from the biomass and adhere to the inside of the furnace.
- the present disclosure has been made in view of the above, and an object of the present disclosure is to provide a biomass solid fuel production apparatus capable of suppressing the collapse of a biomass molded product during production.
- the biomass solid fuel production apparatus is a biomass solid fuel production apparatus including a rotary kiln that carbonizes a biomass molded body obtained by molding raw material biomass, and the rotary kiln is a kiln main body.
- a raw material supply unit that supplies the biomass molded product to the upstream end of the kiln body, and an inert gas supply unit that supplies an inert gas to the upstream end inside the kiln body.
- the inert gas is supplied to the upstream end inside the kiln body into which the biomass molded body in a state where the water content is high before heating is charged. Therefore, it is possible to prevent the biomass molded body from collapsing due to the condensation of water vapor generated from the biomass molded body in the vicinity of the upstream end portion.
- the inert gas supply unit may be configured to discharge the inert gas in the radial direction inside the kiln body.
- water vapor can be supplied to the corners of the upstream end inside the kiln body where water vapor generated from the biomass molded body tends to stay. Therefore, it is possible to further suppress the collapse of the biomass molded product due to the condensation of water vapor.
- the rotary kiln may be of an external heating type, and the upstream end portion of the kiln body may be a non-heating zone in which a heating portion is not provided on the outer periphery.
- the inert gas supply unit may also have a mode in which the inert gas is discharged into the raw material supply unit.
- a biomass solid fuel production apparatus capable of suppressing the collapse of a biomass molded body during production is provided.
- FIG. 1 is a flow chart illustrating an outline of a method for producing a biomass solid fuel according to one embodiment of the present disclosure.
- FIG. 2 is a schematic configuration diagram of a biomass solid fuel production apparatus according to one embodiment of the present disclosure.
- FIG. 3 is an enlarged view of a part of the upstream side of the rotary kiln.
- FIG. 4 is a schematic view of the upstream side of the rotary kiln as viewed from the axial direction.
- FIG. 5 is an enlarged view of the tip of the first nozzle.
- 6 (a) and 6 (b) are views showing a modification of the first nozzle.
- FIG. 1 is a flow chart illustrating an outline of a method for producing a biomass solid fuel according to one embodiment of the present disclosure.
- the biomass used as a raw material for the biomass solid fuel becomes a biomass molded product (White Pellet: hereinafter referred to as “WP”) in the form of pellets through a crushing step (S01) and a molding step (S02).
- WP White Pellet
- This WP is carbonized by being heated in the heating step (S03) to become a biomass solid fuel (Pelletizing Before Torrefaction: hereinafter referred to as "PBT").
- PBT Processing Before Torrefaction
- This PBT becomes a product through a classification / cooling step (S04), if necessary.
- the crushing step (S01) is a step of crushing and then crushing the biomass (raw material biomass) as a raw material.
- the type of biomass used as a raw material is not particularly limited and can be selected from wood-based and vegetative-based.
- the tree species and parts of the biomass as a raw material are not particularly limited, but for example, one embodiment is selected from the group consisting of a rubber tree, acacia, a tree species of the family Futabagaki, radiata pine, and a mixture of larch, spruce, and birch. It can be a raw material containing at least one of these. Larch, spruce, and birch may be used alone as raw material biomass, but two or more of them, preferably a mixture of three, can be used. Further, it can be used as a raw material containing at least one kind (may be a mixture of two or three kinds) selected from the group consisting of a mixture of spruce, pine and fir.
- tree species other than the above may be further contained as a raw material.
- the content is preferably 50% by weight or more, more preferably 80% by weight or more, and may be 100% by weight.
- rice pine rice hemlock, cedar, cypress, European red pine, old almond tree, almond shell, walnut shell, sago palm, EFB (empty fruit bunch of palm oil processing residue), meranti, acacia wood, acacia bark, eucalyptus , Teak, spruce + birch, rubber and the like may be used.
- the particle size of the pulverized biomass is not particularly limited, but can be about 100 ⁇ m to 3000 ⁇ m on average, preferably 400 ⁇ m to 1000 ⁇ m on average.
- a method for measuring the particle size of the biomass powder a known measuring method may be used.
- the molding step (S02) is a step of molding the crushed biomass into a lump using a known molding technique.
- the biomass molded body (WP) which is a mass of biomass after molding, can be pellets or briquettes. The size of the WP can be changed as appropriate.
- a binder such as a binder is not added, and the crushed biomass is compressed and pressurized for molding.
- the biomass molded body (WP) is heated at 150 ° C. to 400 ° C. (low temperature carbonization) to maintain the shape of the molded body, while having strength and water resistance (PBT). ).
- the heating step is performed using the biomass solid fuel production apparatus 100 described later.
- the heating temperature (heating temperature of PBT in the kiln body 20: also referred to as carbonization temperature) is appropriately determined depending on the shape and size of the raw material biomass and lumps, but is less than 300 ° C. More preferably, it is 200 ° C. or higher and lower than 300 ° C. More preferably, it is 230 ° C. or higher and lower than 300 ° C. Further, it is preferably 230 ° C to 280 ° C.
- the heating time in the heating step is not particularly limited, but can be 0.2 hours to 3 hours.
- the classification / cooling step (S04) is a step of classifying and cooling in order to commercialize the PBT obtained by the heating step. Classification and cooling may be omitted, or only one of the steps may be carried out. Classified and cooled PBT as needed is a solid fuel product.
- the biomass solid fuel obtained after the heating step (S03) preferably has a COD (chemical oxygen demand) of 3000 ppm or less when immersed in water.
- COD chemical oxygen demand
- the COD (chemical oxygen demand) (simply referred to as "COD") of the immersion water when the biomass solid fuel is immersed in water is the environment in which the immersion water sample for COD measurement is prepared in 1973.
- Agency Notification No. 13 (a) Refers to the COD value analyzed by JIS K0102 (2016) -17 according to the verification method for metals contained in industrial waste.
- the biomass solid fuel obtained after the heating step preferably has a grindability index (HGI) of 15 or more and 60 or less based on JIS M 8801, and more preferably 20 or more and 60 or less.
- HGI grindability index
- the BET specific surface area of the biomass solid fuel is preferably 0.15 m 2 / g to 0.8 m 2 / g, and more preferably 0.15 m 2 / g to 0.7 m 2 / g.
- the biomass solid fuel preferably has an equilibrium water content of 15 wt% to 65 wt% after being immersed in water, and more preferably 15 wt% to 60 wt%.
- the biomass solid fuel obtained after the heating step has a fuel ratio (fixed carbon / volatile content) of 0.2 to 0.8, an anhydrous base high calorific value of 4800 kcal / kg to 7000 kcal / kg, oxygen O and carbon C.
- the molar ratio O / C of is 0.1 to 0.7
- the molar ratio H / C of hydrogen H and carbon C is 0.8 to 1.3.
- the physical characteristic value of the biomass solid fuel can be set in the above range by adjusting, for example, the tree species of biomass used as a raw material, the site thereof, the heating temperature in the heating step, and the like.
- the industrial analysis value, elemental analysis value, and high calorific value in this specification are based on JIS M 8812, 8813, 8814.
- the maximum temperature reached in the self-heating test of the biomass solid fuel obtained after the heating step is less than 200 ° C.
- the self-heating test is a test specified in "United Nations: Recommendations for Transporting Dangerous Goods: Manual of Test Methods and Criteria: 5th Edition: Self-heating Test".
- FIG. 2 is a schematic configuration diagram illustrating a biomass solid fuel production apparatus used in the heating step.
- FIG. 3 is an enlarged view of the upstream side of the rotary kiln
- FIG. 4 is a view of the kiln main body and the raw material supply section as viewed from the upstream side.
- FIG. 5 is a diagram illustrating the shape of the tip of the first nozzle attached to the kiln body.
- the biomass solid fuel production apparatus 100 has a hopper 1 and a rotary kiln 2 (heating furnace).
- the control related to the hopper 1 and the rotary kiln 2 is controlled by a control unit (not shown).
- the hopper 1 has a function of storing a biomass molded body (WP).
- WP biomass molded body
- the WP stored in the hopper 1 is sequentially supplied to the rotary kiln 2 and heated in the rotary kiln 2.
- PBT biomass solid fuel
- the PBT produced by the rotary kiln 2 is conveyed by the conveyor 3.
- the rotary kiln 2 is a so-called external heat type.
- the rotary kiln 2 heats the kiln main body 20 that introduces the WP to be heated into the inside and heats (low temperature carbonization), the raw material supply unit 30 connected to the upstream end of the kiln main body 20, and the kiln main body 20. It has a heating unit 40 for heating and an inert gas supply unit 50 for supplying the inert gas inside the kiln main body 20.
- the kiln body 20 has a substantially cylindrical shape, and a biomass molded body (WP) to be heated is introduced into the inside from one end, and the heated (low temperature carbonized) biomass solid fuel (PBT) is on the other side. It is discharged from the end of.
- the kiln body 20 has a cylindrical cylinder 21 and a sealing plate 22 provided at an upstream end of the cylinder 21.
- the tubular body 21 is a cylindrical member extending from the upstream side (hopper 1 side) to the downstream side (conveyor 3 side).
- the tubular body 21 is rotatably supported by a roller 25 on the upstream side and a roller 26 on the downstream side with the central axis X (see FIGS. 3 and 4) of the tubular body 21 extending in the moving direction of the WP as the central axis. There is.
- the central axis X of the cylinder 21 is the rotation axis of the kiln body 20.
- the seal plate 22 is a disk-shaped plate material connected to the upstream end of the tubular body 21.
- the seal plate 22 is provided with a circular opening 22a in the center.
- the raw material supply unit 30 is connected to the upstream side of the opening 22a.
- the seal plate 22 is provided with an opening 22b for a nozzle included in the inert gas supply unit 50 at a position different from the opening 22a.
- the raw material supply unit 30 has a function of supplying the heated object (WP) stored in the hopper 1 to the kiln main body 20.
- the raw material supply unit 30 has a tubular supply pipe 31. Inside the supply pipe 31, for example, a screw feeder (not shown) for moving the object to be heated (WP) toward the kiln main body 20 may be provided.
- the heating unit 40 has a heat gas path 41 on the outer periphery of the cylinder 21 of the kiln body 20, and a gas inlet 42 and a gas outlet 43 provided in the heat gas path 41.
- the heat gas path 41 is formed along the outer peripheral surface of the tubular body 21.
- the gas inlet 42 is provided, for example, on the downstream side along the kiln main body 20 with respect to the heat gas path 41.
- the gas outlet 43 is provided, for example, on the upstream side along the kiln main body 20 with respect to the heat gas path 41.
- the heating unit 40 supplies heat gas from the external heat source 4 from the gas inlet 42, passes through the heat gas path 41, and discharges the heat gas from the gas outlet 43.
- the heat gas path 41 is provided around the kiln main body 20, the inside of the kiln main body 20 is indirectly heated.
- the temperature of the kiln body 20 of the rotary kiln 2 can be controlled by controlling the external heat source 4 by a control unit (not shown) and appropriately changing the temperature at the gas inlet 42 of the heat gas path 41.
- the rotary kiln 2 shown in FIGS. 2 and 3 is a countercurrent type in which the moving direction of the biomass molded body (WP) (the direction from the hopper 1 side to the conveyor 3 side) and the moving direction of the heat gas face each other. , It may be a parallel flow type.
- the oxygen concentration in the rotary kiln 2 is set to be, for example, 10% or less.
- the heat gas path 41 arranged on the outer periphery of the cylinder 21 of the kiln main body 20 is provided at a position that does not overlap with the rollers 25 and 26, that is, between the rollers 25 and 26. Therefore, the upstream side of the hot gas path 41 (the region that interferes with the roller 25) and the downstream side of the hot gas path 41 (the region that interferes with the roller 26) are regions where heating by the hot gas is difficult. These areas are so-called non-heated zones. As described above, in the kiln main body 20, the region covered from the heat gas path 41 is a heated zone, and the other region is a non-heated zone.
- the kiln body 20 is installed in an inclined state so that the upstream side (hopper 1 side) is on the upper side and the downstream side (conveyor 3 side) is on the lower side.
- the installation angle of the kiln main body 20 can be appropriately changed according to the size of the kiln main body 20, the moving speed of the WP in the kiln main body 20, and the like.
- the inert gas supply unit 50 introduces the inert gas into the kiln main body 20 and the raw material supply unit 30.
- the inert gas include N 2 , CO 2 , and the like.
- air or the like having an oxygen concentration of 10% or less may be used.
- the inert gas supply unit 50 includes a first nozzle 51 that introduces gas into the kiln main body 20, a gas supply source 52 that supplies the inert gas to the first nozzle 51, a first nozzle 51, and a gas supply. It includes a pipe 53 connecting between the source 52, a second nozzle 54, and a gas supply source and a pipe (not shown) for supplying an inert gas to the second nozzle 54.
- the second nozzle 54 may be supplied with the inert gas from the same gas supply source 52 as the first nozzle 51, or the inert gas may be supplied from a gas supply source different from the gas supply source 52. Further, the piping to the first nozzle 51 and the second nozzle 54 may be partially shared.
- the first nozzle 51 may be cylindrical, for example, and may be attached so as to penetrate the seal plate 22 below the supply pipe 31 of the raw material supply unit 30. Further, as shown in FIG. 5, on the side surface near the tip of the first nozzle 51 (the end on the side opposite to the inert gas supply portion 50 side and arranged inside the kiln main body 20). The opening 51a may be provided. Further, the end surface 51b at the tip of the first nozzle 51 may have a closed shape. Further, as shown in FIG. 4, the first nozzle 51 is fixed to the seal plate 22 so that the opening 51a inserted in the kiln main body 20 faces upward.
- the second nozzle 54 may be, for example, cylindrical and may be inserted into the supply pipe 31 from above the supply pipe 31.
- the second nozzle 54 can be arranged at a location far from the downstream end portion 31a (connection portion with the seal plate 22) of the supply pipe 31, for example, to the extent that backflow of gas does not occur.
- the second nozzle 54 may have a shape in which the tip (the end on the side arranged in the supply pipe 31) is open.
- the inert gas moves in the direction (diametrical direction) intersecting the central axis X. Specifically, since the opening 51a of the first nozzle 51 faces upward, the inert gas is discharged from the first nozzle 51 toward the upper side inside the kiln main body 20. The inert gas discharged from the first nozzle 51 is supplied to the vicinity of the upstream end of the inside of the kiln main body 20 (near the region A shown in FIG. 3), and promotes the movement of the gas staying in the vicinity of this region A.
- the inert gas moves in the direction (diametrical direction) intersecting the central axis of the supply pipe 31. Specifically, the inert gas is discharged from the second nozzle 54 toward the lower side of the supply pipe 31.
- the inert gas may be introduced from the first nozzle 51 and the second nozzle 54 of the inert gas supply unit 50 at all times while the rotary kiln 2 is operating, or the inert gas may be introduced at a predetermined interval.
- the structure may be such that the inert gas is repeatedly introduced.
- the timing of supplying the inert gas from the first nozzle 51 and the second nozzle 54 may be the same, or there may be a timing in which only one of them is supplied. In this way, the supply timing of the inert gas can be changed as appropriate.
- the amount of gas supplied from each of the first nozzle 51 and the second nozzle 54 can be changed as appropriate.
- the supply of the inert gas from the first nozzle 51 and the second nozzle 54 can adjust the gas supply amount to such an extent that the internal biomass molded body (WP) is prevented from scattering.
- a parallel gas flow is formed inside the kiln main body 20 in the same direction as the movement direction of the biomass molded body (WP), that is, from the upstream side to the downstream side.
- This gas flow is formed by providing a discharge port (not shown) for discharging gas moving inside the kiln main body 20 on the downstream side of discharging the PBT produced by the rotary kiln 2 to the conveyor 3. Therefore, the inert gas supplied from the first nozzle 51 and the second nozzle 54 of the inert gas supply unit 50 moves to the downstream side in the same manner as the internal gas flow, and is discharged from the discharge port.
- the kiln main body 20 is charged with the biomass molded body in a state where the water content is high before heating by the inert gas supply unit 50.
- the inert gas is supplied to the upstream end of the interior, specifically near the region A. Therefore, it is possible to prevent the biomass molded body from collapsing due to the condensation of water vapor generated from the biomass molded body in the vicinity of the upstream end portion.
- a biomass molded body is heated (low temperature carbonized) in a rotary kiln 2 to produce a biomass solid fuel.
- the temperature on the upstream side tends to be lower than that on the downstream side. If the unheated biomass molded body is introduced into the kiln body 20 in such a state, the water vapor generated from the biomass molded body tends to condense at the upstream end portion, and the water vapor may cause the biomass molded body to collapse. ..
- the biomass molded product has low water resistance and may collapse or powder.
- the recovery rate of the biomass solid fuel having a predetermined shape may decrease.
- the collapsed / powdered biomass molded body may adhere to the inner peripheral surface in the kiln main body 20, the blade, or the like, the function as the rotary kiln 2 may be deteriorated.
- the inert gas supply unit 50 may be configured to discharge the inert gas in the radial direction inside the kiln main body 20.
- the first nozzle 51 may be included as a configuration for discharging the inert gas in the radial direction.
- the first nozzle 51 discharges the inert gas upward as described in the above embodiment, the movement (purge) of water vapor from the corner portion can be effectively performed.
- the first nozzle 51 is arranged so as to discharge the inert gas at least in the radial direction, it is inert in the direction of interfering with the gas flow inside the kiln main body 20 from the upstream side to the downstream side. The gas is discharged and the movement of the gas containing water vapor in the radial direction is promoted.
- the configuration to discharge the inert gas at least in the radial direction, the movement of the water vapor staying in the upper corner is promoted, and the collapse of the biomass molded body due to the condensation of the water vapor can be further suppressed. .. Even if the configuration is such that the inert gas is discharged into the kiln main body 20 in the X direction of the central axis, at least the change in the gas flow inside the kiln main body 20 can be caused, so that the movement of water vapor can be promoted.
- the rotary kiln 2 when the rotary kiln 2 is an external heat type and the upstream end portion of the kiln body 20 is a non-heated zone, water vapor in this portion is more likely to condense.
- a roller 25 may be provided in the vicinity of the inlet as a mechanism for rotating the kiln. In this case, it is difficult to arrange the heating portion on the outer peripheral portion around the roller 25, and this region is inevitably a non-heating zone, so that there is a problem that water vapor tends to stay.
- the inert gas as described above, the movement of water vapor can be promoted in the non-heated zone.
- the inert gas supply unit 50 may also supply the inert gas into the raw material supply unit 30 by using the second nozzle 54 or the like.
- the inert gas When the inert gas is supplied to the upstream end of the kiln main body 20, some water vapor may move from the kiln main body 20 into the raw material supply unit 30 upstream.
- the inert gas by supplying the inert gas to the raw material supply unit 30 as described above, the collapse of the biomass molded body inside the raw material supply unit 30 can be suppressed.
- the rotary kiln 2 can have a carbonization temperature of less than 300 ° C. in a heating zone provided with a heating unit 40 on the outer periphery of the kiln body 20.
- a carbonization temperature in the heated zone of the kiln main body 20 of the rotary kiln 2 is less than 300 ° C.
- the temperature rise in the non-heated zone adjacent to the heated zone is suppressed. Therefore, condensation of water vapor generated when the biomass molded body is heated is relatively likely to occur.
- heating is performed at a carbonization temperature of 500 ° C.
- the carbonization temperature is less than 300 ° C. as in the biomass solid fuel production apparatus 100 of the present embodiment, the temperature rise in the non-heated zone in the vicinity of the heated zone is small (for example, about less than 100 ° C.). Therefore, the condensation of water vapor is likely to occur, and as a result, the disintegration and pulverization of the biomass molded product is likely to be promoted.
- the configuration described in the above embodiment can be applied. Further, even when the carbonization temperature in the kiln main body 20 is 300 ° C. or higher, by applying the configuration described in the above embodiment, there is an effect that it becomes possible to produce a biomass solid fuel in which disintegration during production is suppressed. can get.
- each part of the biomass solid fuel production apparatus 100 including the rotary kiln 2 can be appropriately changed.
- the shape and arrangement of the input port of the biomass molded body, the discharge port of the biomass solid fuel, and the like can be appropriately changed.
- the arrangement, shape, number, etc. of the first nozzle 51 and the second nozzle 54 can be changed as appropriate.
- the shape of the first nozzle 51 capable of discharging the inert gas in the radial direction intersecting the central axis X can be appropriately changed.
- the nozzle itself may be bent and the end portion 51c may be open.
- a plurality of openings 51a may be provided on the side surface.
- the shape of the first nozzle can be appropriately changed according to the ejection direction.
- the mounting position of the first nozzle 51 with respect to the seal plate 22 can be changed, and for example, an opening 22b for mounting the first nozzle 51 may be provided above the raw material supply unit 30. Further, a plurality of the first nozzle 51 and the second nozzle 54 may be arranged.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
Abstract
Description
Claims (4)
- 原料バイオマスを成型したバイオマス成型体を炭化するロータリーキルンを含むバイオマス固体燃料製造装置であって、
前記ロータリーキルンは、
キルン本体と、
前記キルン本体の上流側端部へ前記バイオマス成型体を供給する原料供給部と、
前記キルン本体の内部の上流側端部に不活性ガスを供給する不活性ガス供給部と、
を備える、バイオマス固体燃料製造装置。 - 前記不活性ガス供給部は、前記キルン本体の内部において径方向へ前記不活性ガスを吐出する、請求項1に記載のバイオマス固体燃料製造装置。
- 前記ロータリーキルンは外熱式であって、
前記キルン本体の前記上流側端部は、外周に加熱部が設けられていない非加熱帯である、請求項1または2に記載のバイオマス固体燃料製造装置。 - 前記不活性ガス供給部は、前記原料供給部内にも前記不活性ガスを供給する、請求項1~3のいずれか一項に記載のバイオマス固体燃料製造装置。
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AU2021380194A AU2021380194A1 (en) | 2020-11-10 | 2021-10-07 | Biomass solid fuel manufacturing device |
CA3200720A CA3200720A1 (en) | 2020-11-10 | 2021-10-07 | Biomass solid fuel manufacturing device |
JP2022561330A JPWO2022102296A1 (ja) | 2020-11-10 | 2021-10-07 | |
US18/251,478 US20240002730A1 (en) | 2020-11-10 | 2021-10-07 | Biomass solid fuel manufacturing device |
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Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002003855A (ja) * | 2000-06-23 | 2002-01-09 | Ngk Insulators Ltd | 炭化物の製造方法 |
JP2006258328A (ja) * | 2005-03-15 | 2006-09-28 | Mitsui Eng & Shipbuild Co Ltd | 回転加熱処理装置及びそのシール装置の性能評価方法 |
JP2012098015A (ja) * | 2010-11-05 | 2012-05-24 | Ihi Corp | 廃棄物熱分解ガス化装置 |
JP2014214236A (ja) * | 2013-04-26 | 2014-11-17 | 三菱重工業株式会社 | 乾留装置 |
WO2016143433A1 (ja) * | 2015-03-09 | 2016-09-15 | 三菱重工業株式会社 | 石炭改質プラントおよび改質石炭の製造方法 |
JP2020033396A (ja) * | 2018-08-27 | 2020-03-05 | 宇部興産株式会社 | バイオマス固体燃料製造方法およびバイオマス固体燃料製造装置 |
-
2021
- 2021-10-07 AU AU2021380194A patent/AU2021380194A1/en active Pending
- 2021-10-07 JP JP2022561330A patent/JPWO2022102296A1/ja active Pending
- 2021-10-07 WO PCT/JP2021/037171 patent/WO2022102296A1/ja active Application Filing
- 2021-10-07 CA CA3200720A patent/CA3200720A1/en active Pending
- 2021-10-07 US US18/251,478 patent/US20240002730A1/en active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002003855A (ja) * | 2000-06-23 | 2002-01-09 | Ngk Insulators Ltd | 炭化物の製造方法 |
JP2006258328A (ja) * | 2005-03-15 | 2006-09-28 | Mitsui Eng & Shipbuild Co Ltd | 回転加熱処理装置及びそのシール装置の性能評価方法 |
JP2012098015A (ja) * | 2010-11-05 | 2012-05-24 | Ihi Corp | 廃棄物熱分解ガス化装置 |
JP2014214236A (ja) * | 2013-04-26 | 2014-11-17 | 三菱重工業株式会社 | 乾留装置 |
WO2016143433A1 (ja) * | 2015-03-09 | 2016-09-15 | 三菱重工業株式会社 | 石炭改質プラントおよび改質石炭の製造方法 |
JP2020033396A (ja) * | 2018-08-27 | 2020-03-05 | 宇部興産株式会社 | バイオマス固体燃料製造方法およびバイオマス固体燃料製造装置 |
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AU2021380194A1 (en) | 2023-06-08 |
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JPWO2022102296A1 (ja) | 2022-05-19 |
US20240002730A1 (en) | 2024-01-04 |
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