WO2022018982A1 - 粉砕装置及び粉砕物パージ方法 - Google Patents
粉砕装置及び粉砕物パージ方法 Download PDFInfo
- Publication number
- WO2022018982A1 WO2022018982A1 PCT/JP2021/021280 JP2021021280W WO2022018982A1 WO 2022018982 A1 WO2022018982 A1 WO 2022018982A1 JP 2021021280 W JP2021021280 W JP 2021021280W WO 2022018982 A1 WO2022018982 A1 WO 2022018982A1
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- WIPO (PCT)
- Prior art keywords
- discharge pipe
- cold air
- pipe
- damper
- purge
- Prior art date
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- 238000010926 purge Methods 0.000 title claims abstract description 172
- 239000000463 material Substances 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims description 12
- 239000012530 fluid Substances 0.000 claims abstract description 37
- 239000002023 wood Substances 0.000 claims description 73
- 239000000843 powder Substances 0.000 claims description 50
- 239000002028 Biomass Substances 0.000 claims description 30
- 239000008188 pellet Substances 0.000 description 74
- 239000000446 fuel Substances 0.000 description 22
- 239000003245 coal Substances 0.000 description 20
- 230000007246 mechanism Effects 0.000 description 8
- 238000002485 combustion reaction Methods 0.000 description 7
- 239000002245 particle Substances 0.000 description 6
- 238000011144 upstream manufacturing Methods 0.000 description 6
- 230000001174 ascending effect Effects 0.000 description 4
- 230000005856 abnormality Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 235000013312 flour Nutrition 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
- B02C15/04—Mills with pressed pendularly-mounted rollers, e.g. spring pressed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
- B02C23/24—Passing gas through crushing or disintegrating zone
- B02C23/26—Passing gas through crushing or disintegrating zone characterised by point of gas entry or exit or by gas flow path
-
- 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
- F23K3/02—Pneumatic feeding arrangements, i.e. by air blast
Definitions
- the present invention relates to a crushing device and a crushed material purging method.
- Patent Document 1 discloses a method for purging residual coal in a coal crusher for a boiler.
- the crusher is operated with a blower that supplies drying air (mixed air of cold air and hot air) to the crusher in the crusher and in the pulverized coal discharge pipe. Residual coal is removed (purged) into the coal burner of the boiler and the residual coal is burned.
- the combustion of the residual coal in the coal burner can be detected by the flame detector, so that the pulverizer can be restarted quickly.
- the drying air supplied from the blower to the pulverizer not only circulates to the coal burner via the pulverized coal discharge pipe, but also through various pipes connected to the pulverizer and other routes other than the pulverized coal discharge pipe. Since it leaks to the pulverized coal, the residual coal in the pulverized coal discharge pipe located at the most downstream of the flow route of the drying air cannot be sufficiently purged.
- One aspect of the present invention is a crushing device that supplies a crushed product crushed by the main body to a supply destination via at least one discharge pipe, which is provided separately from the main body and is described when the main body is stopped.
- a purge fluid supply unit for supplying a predetermined purging fluid to at least one discharge pipe is provided.
- the purging fluid may be primary cold air supplied to the main body.
- the purge fluid supply unit may take out the primary cold air from the cold air supply pipe that supplies the primary cold air to the main body and supply the taken out primary cold air to the at least one discharge pipe.
- the cold air supply pipe may be connected to a seal air supply pipe that takes out the seal air that protects the rotating portion of the main body, and the purge fluid supply portion may be connected to the seal air supply pipe in the cold air supply pipe.
- the primary cold air may be taken out from the front.
- the at least one discharge pipe may include a plurality of discharge pipes, and the purge fluid supply unit may supply the purge fluid to the plurality of discharge pipes in a state where the flow rate is adjusted.
- the main body may produce wood powder as the crushed product by crushing woody biomass.
- Another aspect of the present invention is a method of purging residual crushed material from a discharge pipe that supplies crushed material crushed by the main body to a supply destination, and is provided separately from the main body when the main body stops operating. It includes supplying a predetermined purging fluid from the purged fluid supply unit to the discharge pipe.
- the crushing apparatus A and the crushed material purging method according to the embodiment of the present invention will be described with reference to the drawings.
- the wood-based biomass is the object to be crushed, and the wood-based biomass is crushed to generate wood flour as the crushed product.
- Such a crushing device A supplies wood powder (crushed material) to a supply destination such as a boiler.
- woody biomass is surplus wood such as thinned wood, and is mainly generated in the forestry business field.
- Such woody biomass is, for example, processed into pellets at the generation site and carried into the crushing site where the crushing device A is installed by using a predetermined transportation means.
- woody biomass material to be crushed
- biomass material to be crushed
- such a crushing device A includes a pellet bunker 1, a wood feeder 2, a pellet mill 3, a first discharge pipe 4, a first outlet damper 5, a second discharge pipe 6, and a second outlet damper. 7, 3rd discharge pipe 8, 3rd outlet damper 9, cold air supply pipe 10, cold air damper 11, seal air supply pipe 12, seal air damper 13, shutoff damper 14, check valve 15, 1st purge pipe 16
- a first purge damper 17, a second purge pipe 18, a second purge damper 19, a third purge pipe 20, a third purge damper 21, a hot air supply pipe 22, a primary air damper 23, and a crushing control device 24 are provided.
- Pellet bunker 1 is a hopper with a predetermined capacity that accepts biomass supplied from the outside.
- the pellet bunker 1 temporarily stores the biomass input from above, and supplies the stored biomass to the wood feeder 2 from the lower part.
- Such a pellet bunker 1 functions as a buffer for temporarily storing a predetermined volume of biomass.
- the wood feeder 2 is a biomass supply device that measures the biomass supplied from the pellet bunker 1 and supplies the biomass to the pellet mill 3.
- the wood feeder 2 measures, for example, the weight of the biomass supplied from the pellet bunker 1 and supplies a constant weight of biomass to the pellet mill 3 in a unit time.
- the wood feeder 2 manages the amount of biomass supplied to the pellet mill 3 not as the volume of biomass per unit time (m3 / h) but as the weight per unit time (kg / h).
- Such a wood feeder 2 is a controlled device of the crushing control device 24, and the operation (supply amount) is controlled by the crushing control device 24.
- the pellet mill 3 is a crusher that crushes the biomass supplied from such a wood feeder 2.
- the pellet mill 3 produces wood flour as a crushed product by pressurizing and crushing a predetermined supply amount of biomass sequentially supplied from the wood feeder 2 by an internal crushing mechanism.
- Such a pellet mill 3 is, for example, a vertical mill, and is provided with a rotary table that rotates in a horizontal plane and a crushing roller that sandwiches and presses biomass between the rotary table as a crushing mechanism. Further, the pellet mill 3 is a controlled device of the crushing control device 24, and the entire operation is controlled by the crushing control device 24.
- the pellet mill 3 when the pellet mill 3 is a vertical mill, the biomass (crushed material) is crushed on a rotary table to become wood powder (crushed material). Since this wood powder has a smaller particle size than biomass, it is lighter than biomass. Further, an ascending flow of air is generated in the pellet mill 3, and the rising flow acts on the wood powder, so that the wood powder is blown upward from the rotary table.
- a rating machine is provided above the pellet mill 3.
- This classifier classifies the wood powder that enters from below on the ascending current, and allows only those that are smaller than the predetermined standard particle size to pass toward the outside of the pellet mill 3 and is larger than the standard particle size. Drop a large object and put it back on the turntable. The wood powder returned on the rotary table is crushed again by the crushing mechanism to become a powder having a smaller diameter, and also enters the classifier by the ascending current.
- the three discharge pipes that is, the first discharge pipe 4, the second discharge pipe 6, and the third discharge pipe 8, are such wood powder smaller than the standard particle size, that is, the product of the pellet mill 3 is transferred from the pellet mill 3. Supply to the supply destination.
- the upper part of the pellet mill 3 is provided with a discharge mechanism that divides wood powder smaller than the standard particle size supplied from the classifier into three substantially evenly.
- This discharge mechanism distributes and supplies substantially the same amount (discharge amount) of wood powder to the three discharge pipes (first discharge pipe 4, second discharge pipe 6 and third discharge pipe 8).
- the three discharge pipes (first discharge pipe 4, second discharge pipe 6 and third discharge pipe 8) are arranged at substantially equal intervals on the upper surface of the pellet mill 3, for example.
- the pellet bunker 1, the wood feeder 2, and the pellet mill 3 described above constitute the main body of the crushing device A. That is, the pellet bunker 1, the wood feeder 2, and the pellet mill 3 are mechanical parts that crush the biomass (material to be crushed), which is the main function of the crushing device A, and are the products of the crushing device A. It is also a mechanical part that manufactures crushed material).
- the first discharge pipe 4, the second discharge pipe 6 and the third discharge pipe 8 in the present embodiment correspond to the discharge pipe of the present invention (also referred to as a crushed product discharge pipe in the present disclosure).
- the discharge pipe of the present invention also referred to as a crushed product discharge pipe in the present disclosure.
- second discharge pipe 6 and third discharge pipe 8 one end of the first discharge pipe 4 is connected to the upper surface of the pellet mill 3, and the other end is connected to the fuel burner of the supply destination. There is.
- the first discharge pipe 4 communicates with the internal space of the pellet mill 3 and supplies a predetermined amount of wood powder supplied from the discharge mechanism to the fuel burner.
- Such a first discharge pipe 4 functions as a discharge pipe for discharging wood powder to the pellet mill 3, and functions as a supply pipe for supplying wood powder to the fuel burner.
- the first outlet damper 5 is a flow rate adjusting device provided in the middle of the first discharge pipe 4 to adjust the passing flow rate of wood powder, that is, the supply amount to the fuel burner.
- the first outlet damper 5 is, for example, a butterfly valve, and the supply amount of wood powder is adjusted by varying the passing area (opening degree) of wood powder.
- the first outlet damper 5 is a controlled device of the crushing control device 24, and the passing area (opening degree) is set by the crushing control device 24.
- the second discharge pipe 6 communicates with the internal space of the pellet mill 3 and supplies a predetermined amount of wood powder supplied from the discharge mechanism to the fuel burner.
- Such a second discharge pipe 6 functions as a discharge pipe for discharging wood powder to the pellet mill 3 and also functions as a supply pipe for supplying wood powder to the fuel burner.
- the second outlet damper 7 is a flow rate adjusting device provided in the middle of the second discharge pipe 6 to adjust the passing flow rate of wood powder, that is, the supply amount to the fuel burner.
- the second outlet damper 7 is, for example, a butterfly valve, and the supply amount of wood powder is adjusted by varying the passing area (opening degree) of the wood powder.
- the second outlet damper 7 is a controlled device of the crushing control device 24, and the passing area (opening degree) is set by the crushing control device 24.
- the third discharge pipe 8 communicates with the internal space of the pellet mill 3 and supplies a predetermined amount of wood powder supplied from the discharge mechanism to the fuel burner.
- Such a third discharge pipe 8 functions as a discharge pipe for discharging wood powder to the pellet mill 3, and functions as a supply pipe for supplying wood powder to the fuel burner.
- the third outlet damper 9 is a flow rate adjusting device provided in the middle of the third discharge pipe 8 to adjust the passing flow rate of wood powder, that is, the supply amount to the fuel burner.
- the third outlet damper 9 is, for example, a butterfly valve, and the supply amount of wood powder is adjusted by varying the passing area (opening degree) of the wood powder.
- the third outlet damper 9 is a controlled device of the crushing control device 24, and the passing area (opening degree) is set by the crushing control device 24.
- Each group is composed of, for example, a plurality of combustion burners.
- three such groups are provided, and the above-mentioned three discharge pipes (first discharge pipe 4, second discharge pipe 6 and third discharge pipe 8) are provided corresponding to each group. There is.
- the first discharge pipe 4 supplies wood powder as fuel to a plurality of fuel burners constituting the first group burners.
- the second discharge pipe 6 supplies wood powder as fuel to a plurality of fuel burners constituting the second group burner.
- the third discharge pipe 8 supplies wood powder as fuel to a plurality of fuel burners constituting the third group burner.
- the first discharge pipe 4 is a first supply pipe that supplies wood powder as fuel to a plurality of combustion burners constituting the first group.
- the second discharge pipe 6 is a second supply pipe that supplies wood powder as fuel to a plurality of combustion burners constituting the second group.
- the third discharge pipe 8 is a third supply pipe that supplies wood powder as fuel to a plurality of combustion burners constituting the third group.
- the cold air supply pipe 10 supplies the primary cold air received from the cold air supply source to the hot air supply pipe 22.
- the primary cold air is air in a temperature range similar to that of the outside air, and is mixed with the primary hot air flowing through the hot air supply pipe 22. Such primary cold air corresponds to the purging fluid of the present invention.
- the cold air damper 11 is provided in the middle of the cold air supply pipe 10, and is a flow rate adjusting device for adjusting the passing flow rate of the primary cold air in the cold air supply pipe 10.
- the cold air damper 11 is, for example, a butterfly valve, and adjusts the supply amount of the primary cold air flowing into the hot air supply pipe 22 by varying the passing area (opening degree) of the primary cold air.
- Such a cold air damper 11 is a controlled device of the crushing control device 24, and the passing area (opening degree) is set by the crushing control device 24.
- One end of the sealed air supply pipe 12 is connected to an intermediate portion of the cold air supply pipe 10, and the other end is connected to the pellet mill 3. More specifically, one end of the sealed air supply pipe 12 is connected to the upstream side of the cold air damper 11 in the flow direction of the primary cold air.
- the seal air supply pipe 12 supplies primary cold air as seal air for protecting various rotating portions of the pellet mill 3.
- the seal air damper 13 is provided in the middle of the seal air supply pipe 12, and is a flow rate adjusting device for adjusting the passing flow rate of the primary cold air in the seal air supply pipe 12.
- the seal air damper 13 is, for example, a butterfly valve, and adjusts the supply amount of the primary cold air flowing into the pellet mill 3 by varying the passing area (opening degree) of the primary cold air.
- Such a seal air damper 13 is a controlled device of the crushing control device 24, and the passing area (opening degree) is set by the crushing control device 24.
- the shutoff damper 14 is provided between the seal air damper 13 and the check valve 15 in the seal air supply pipe 12.
- the shutoff damper 14 is an on-off valve and shuts off / allows the flow of primary cold air in the seal air supply pipe 12. That is, the opening degree of the shutoff damper 14 is set to a binary value of fully closed or fully open, the inflow of the primary cold air into the pellet mill 3 is blocked when the shutoff damper 14 is fully closed, and the pellet mill of the primary cold air is fully opened. Allow inflow to 3.
- Such a cutoff damper 14 is a controlled device of the crushing control device 24, and the open / closed state is set by the crushing control device 24.
- the check valve 15 blocks the backflow of air. That is, the check valve 15 prevents the air in the pellet mill 3 from flowing from the other end of the sealed air supply pipe 12 (pellet mill 3) toward one end of the sealed air supply pipe 12. Such a check valve 15 is for preventing the air in the pellet mill 3 from flowing into the seal air supply pipe 12 due to an abnormally high internal pressure of the pellet mill 3.
- One end of the first purge pipe 16 is connected to the cold air supply pipe 10, and the other end is connected to the first discharge pipe 4. More precisely, one end of the first purge pipe 16 is connected to the upstream side of the cold air damper 11 in the cold air supply pipe 10. Further, the other end of the first purge pipe 16 is connected to the downstream side of the first outlet damper 5 in the first discharge pipe 4.
- Such a first purge pipe 16 is a bypass pipe for circulating the primary cold air to the first discharge pipe 4, and is provided exclusively for the first discharge pipe 4. That is, the first purge pipe 16 replaces the primary cold air with the pellet mill 3 when the main body of the crushing device A described above, that is, the pellet bunker 1, the wood feeder 2, and the pellet mill 3 is stopped. Supply to 4.
- Such a first purge pipe 16 purges (excludes) residual wood powder (residual pulverized material) in the first discharge pipe 4 by primary cold air.
- the first purge damper 17 is provided in the middle of the first purge pipe 16 and is a flow rate adjusting device for adjusting the passing flow rate of the primary cold air in the first purge pipe 16.
- the first purge damper 17 is, for example, a butterfly valve, and adjusts the supply amount of the primary cold air flowing into the first discharge pipe 4 by varying the passing area (opening degree) of the primary cold air.
- Such a first purge damper 17 is a controlled device of the crushing control device 24, and the passing area (opening degree) is set by the crushing control device 24.
- One end of the second purge pipe 18 is connected to the cold air supply pipe 10, and the other end is connected to the second discharge pipe 6. More precisely, one end of the second purge pipe 18 is connected to the upstream side of the cold air damper 11 in the cold air supply pipe 10. Further, the other end of the second purge pipe 18 is connected to the downstream side of the second outlet damper 7 in the second discharge pipe 6.
- Such a second purge pipe 18 is a bypass pipe for circulating the primary cold air to the second discharge pipe 6, and is provided exclusively for the second discharge pipe 6. That is, the second purge pipe 18 replaces the primary cold air with the pellet mill 3 when the main body of the crushing device A described above, that is, the pellet bunker 1, the wood feeder 2, and the pellet mill 3 is stopped. Supply to 6.
- Such a second purge pipe 18 purges (excludes) residual wood powder (residual pulverized material) in the second discharge pipe 6 by primary cold air.
- the second purge damper 19 is provided in the middle of the second purge pipe 18 and is a flow rate adjusting device for adjusting the passing flow rate of the primary cold air in the second purge pipe 18.
- the second purge damper 19 is, for example, a butterfly valve, and adjusts the supply amount of the primary cold air flowing into the second discharge pipe 6 by changing the passing area (opening) of the primary cold air.
- Such a second purge damper 19 is a controlled device of the crushing control device 24, and the passing area (opening degree) is set by the crushing control device 24.
- One end of the third purge pipe 20 is connected to the cold air supply pipe 10, and the other end is connected to the third discharge pipe 8. More precisely, one end of the third purge pipe 20 is connected to the upstream side of the cold air damper 11 in the cold air supply pipe 10. Further, the other end of the third purge pipe 20 is connected to the downstream side of the third outlet damper 9 in the third discharge pipe 8.
- Such a third purge pipe 20 is a bypass pipe for circulating the primary cold air to the third discharge pipe 8, and is provided exclusively for the third discharge pipe 8. That is, the third purge pipe 20 replaces the primary cold air with the pellet mill 3 when the main body of the crushing device A described above, that is, the pellet bunker 1, the wood feeder 2, and the pellet mill 3 is stopped. Supply to 8.
- Such a third purge pipe 20 purges (excludes) residual wood powder (residual pulverized material) in the third discharge pipe 8 by primary cold air.
- the third purge damper 21 is provided in the middle of the third purge pipe 20 and is a flow rate adjusting device for adjusting the flow rate of the primary cold air passing through the third purge pipe 20.
- the third purge damper 21 is, for example, a butterfly valve, and adjusts the supply amount of the primary cold air flowing into the third discharge pipe 8 by changing the passing area (opening) of the primary cold air.
- Such a third purge damper 21 is a controlled device of the crushing control device 24, and the passing area (opening degree) is set by the crushing control device 24.
- the above-mentioned first purge pipe 16, first purge damper 17, second purge pipe 18, second purge damper 19, third purge pipe 20, and third purge damper 21 constitute the purge fluid supply unit of the present invention. That is, when the first purge pipe 16, the first purge damper 17, the second purge pipe 18, the second purge damper 19, the third purge pipe 20 and the third purge damper 21 are provided separately from the main body, and the main body is stopped.
- the primary cold air is supplied to the discharge pipes (first discharge pipe 4, second discharge pipe 6 and third discharge pipe 8) as a predetermined purging fluid.
- the hot air supply pipe 22 supplies the primary hot air received from the hot air supply source to the pellet mill 3.
- the primary hot air is generated by heating the outside air, and is therefore higher in temperature than the primary cold air.
- Such primary hot air is supplied to the pellet mill 3 in the same manner as the primary cold air in order to generate the above-mentioned ascending current.
- the primary air damper 23 is provided in the middle of the hot air supply pipe 22, that is, on the downstream side of the connection position of the other end of the cold air supply pipe 10 in the hot air supply pipe 22.
- the primary air damper 23 is a flow rate adjusting device that adjusts the passing flow rate of the mixed air (primary air) of the primary cold air and the primary hot air generated at the connection position between the cold air supply pipe 10 and the hot air supply pipe 22. Is.
- the primary air damper 23 is, for example, a butterfly valve, and by varying the passage area (opening) of the primary air, the supply amount of the primary air flowing into the pellet mill 3 is adjusted.
- a primary air damper 23 is a controlled device of the crushing control device 24, and the passing area (opening degree) is set by the crushing control device 24.
- the crushing control device 24 controls the crushing device A in an integrated manner by controlling the above-mentioned controlled device.
- the crushing control device 24 includes a wood feeder 2, a pellet mill 3, a first outlet damper 5, a second outlet damper 7, a third outlet damper 9, and a cold air damper, which are controlled devices.
- the seal air damper 13, the shutoff damper 14, the first purge damper 17, the second purge damper 19, the third purge damper 21, and the primary air damper 23 are electrically connected to each other via a control wire.
- the crushing control device 24 detects the operating state of the controlled device via this control wire and outputs an operation signal to the controlled device. That is, the crushing control device 24 controls the operation of the wood feeder 2 and the pellet mill 3 based on the above operation signal, and also controls the operation of the first outlet damper 5, the second outlet damper 7, the third outlet damper 9, and the cold air damper. 11.
- the opening degrees of the seal air damper 13, the shutoff damper 14, the first purge damper 17, the second purge damper 19, the third purge damper 21, and the primary air damper 23 are appropriately set.
- the crushing control device 24 outputs an operation signal to the controlled device (wood feeder 2, pellet mill 3, first outlet damper 5, second outlet damper 7, third outlet damper 9, cold air damper 11, seal air damper 13, Biomass (crushed material) is sequentially crushed by outputting to the shutoff damper 14, the first purge damper 17, the second purge damper 19, the third purge damper 21 and the primary air damper 23), and the wood powder (crushed product) is the product. To the supply destination in sequence.
- the crushing control device 24 detects some abnormality in the crushing device A, the crushing device A is urgently stopped (step S1). For example, a wood feeder 2, a pellet mill 3, a first outlet damper 5, a second outlet damper 7, a third outlet damper 9, a cold air damper 11, a seal air damper 13, a shutoff damper 14, and a first purge damper, which are controlled targets. 17, When the abnormality of the second purge damper 19, the third purge damper 21 and the primary air damper 23 is detected, the crushing control device 24 makes the crushing device A emergency stop.
- the manager who manages the operation of the crushing device A identifies the cause of the emergency stop and takes countermeasures. As a result, the crushing device A returns to a state in which normal operation is possible. Then, when the manager confirms that the abnormality of the crushing device A has been resolved, the manager inputs a restart command to the crushing control device 24. This restart command is input to the crushing control device 24 by using the operation panel incidentally provided to the crushing control device 24.
- Step S2 When the crushing control device 24 determines (recognizes) the input of such a restart command (step S2), the crushing control device 24 first sets the first outlet damper 5, the second outlet damper 7, and the third outlet damper 9 to the fully closed state. (Step S3). That is, the crushing control device 24 sets the first to third outlet dampers 5, 7, and 9 to the fully closed state, so that the first discharge pipe 4, the second discharge pipe 6, the third discharge pipe 8 and the pellet mill are set. The communication state with 3 is completely cut off.
- the crushing control device 24 sets the cold air damper 11 provided in the cold air supply pipe 10 to the fully closed state (step S4). That is, the crushing control device 24 shuts off the communication state of the cold air supply pipe 10 at the position of the cold air damper 11. As a result, it is possible to completely prevent the primary cold air of the cold air supply pipe 10 from flowing into the hot air supply pipe 22 and flowing into the pellet mill 3 through the hot air supply pipe 22.
- the crushing control device 24 sets the shutoff damper 14 provided in the middle portion of the seal air supply pipe 12 to the fully closed state (step S5). That is, the crushing control device 24 completely shuts off the communication state between the cold air supply pipe 10 and the pellet mill 3 by the seal air supply pipe 12. As a result, the primary cold air of the cold air supply pipe 10 is completely prevented from flowing into the pellet mill 3 through the sealed air supply pipe 12.
- the crushing control device 24 sets the first purge damper 17, the second.
- the purge damper 19 and the third purge damper 21 are set to the fully open state (step S6).
- the total amount of the primary cold air flowing into the cold air supply pipe 10 from the air supply source is the first discharge pipe 4, It will flow into the second discharge pipe 6 and the third discharge pipe 8.
- the primary cold air is sequentially supplied to the first discharge pipe 4 via the first purge pipe 16, and the primary cold air is sequentially supplied to the second discharge pipe 6 via the second purge pipe 18.
- Primary cold air is sequentially supplied to the 3 discharge pipe 8 via the third purge pipe 20.
- the crushing control device 24 measures the elapsed time from the process of step S5, that is, the elapsed time from the start of supplying the primary cold air to the first discharge pipe 4, the second discharge pipe 6, and the third discharge pipe 8. Then, it is determined whether or not the elapsed time exceeds the time threshold value T (step S7). When the determination in step S7 is "Yes", that is, when the elapsed time exceeds the time threshold value T, the crushing control device 24 determines the first discharge pipe 4, the second discharge pipe 6, and the third discharge pipe 8. Notify the administrator of the completion of purging (step S8).
- the primary cold air taken out from the cold air supply pipe 10 is passed through the first purge pipe 16, the second purge pipe 18 and the third purge pipe 20 to the first discharge pipe 4 and the second discharge pipe 6. And since it is supplied to the third discharge pipe 8, the residual wood powder (residual crushed material) remaining in the first discharge pipe 4, the second discharge pipe 6 and the third discharge pipe 8 at the time of emergency stop of the crusher A is more reliable. It is possible to purge to.
- the first discharge is caused by leakage of the primary cold air in the pellet mill 3. It is not possible to supply a sufficient amount and pressure of primary cold air to the pipe 4, the second discharge pipe 6, and the third discharge pipe 8.
- the primary cold air is discharged to the first discharge pipe 4 and the second discharge pipe 4 via the first purge pipe 16, the second purge pipe 18 and the third purge pipe 20 without passing through the pellet mill 3. Since it is supplied to the pipe 6 and the third discharge pipe 8, it is possible to supply the primary cold air having a sufficient amount and pressure necessary for purging the residual wood powder (residual pulverized product).
- the present embodiment it is possible to more reliably purge the residual wood powder (residual pulverized product) in the first discharge pipe 4, the second discharge pipe 6, and the third discharge pipe 8. Further, according to the present embodiment, it is possible to purge the residual wood powder (residual pulverized material) in the first discharge pipe 4, the second discharge pipe 6 and the third discharge pipe 8 in a shorter time than before. It is possible to restart the crushing device A after an emergency stop in a shorter time than before.
- primary cold air is adopted as the purging fluid supplied to the first discharge pipe 4, the second discharge pipe 6, and the third discharge pipe 8. Since this primary cold air has a lower temperature than the primary hot air, residual wood powder (residual crushed material) that is a concern when the purging fluid is supplied to the first discharge pipe 4, the second discharge pipe 6 and the third discharge pipe 8. ) Can be prevented more reliably.
- the first purge pipe 16, the second purge pipe 18, and the second purge pipe 18 are on the upstream side of the seal air supply pipe 12 through which the primary cold air (seal air) for protecting the rotating portion of the pellet mill 3 is circulated.
- Each end of the purge pipe 20 is connected. That is, in the present embodiment, in the cold air supply pipe 10, the primary cold air is taken out from the front of the sealed air supply pipe 12 as a purging fluid and supplied to the first discharge pipe 4, the second discharge pipe 6, and the third discharge pipe 8. do.
- the primary cold air (purge fluid) is supplied to the first discharge pipe 4 and the second discharge pipe regardless of the supply of the primary cold air (seal air) to the rotating portion of the pellet mill 3. It is possible to supply to 6 and the 3rd discharge pipe 8.
- the first purge damper 17, the second purge damper 19, and the third purge damper 21 are provided in each of the first purge pipe 16, the second purge pipe 18, and the third purge pipe 20. That is, in the present embodiment, the primary cold air (purging fluid) is supplied to the plurality of discharge pipes, that is, the first discharge pipe 4, the second discharge pipe 6, and the third discharge pipe 8 in a state where the flow rate is adjusted.
- the flow rate of the primary cold air (fluid for purging) is adjusted according to the amount of residual wood powder (residual pulverized material) in the first discharge pipe 4, the second discharge pipe 6, and the third discharge pipe 8. It can be set as appropriate.
- the present invention is not limited to the above embodiment, and for example, the following modifications can be considered.
- a crushing device A biomass mill
- the present invention is various. It is possible to apply it when crushing a large object to be crushed.
- the present invention can be applied to a crushing device that produces pulverized coal as a pulverized product and coal as an object to be pulverized.
- the primary cold air is adopted as the purging fluid, but the present invention is not limited to this.
- the primary hot air may be used as the purging fluid instead of the primary cold air.
- the flow rate and pressure are sufficient to sufficiently purge the residual wood powder (residual pulverized material) of the first discharge pipe 4, the second discharge pipe 6, and the third discharge pipe 8. , Preferably those having a temperature of about normal temperature.
- the first purge damper 17, the second outlet damper 7, the third outlet damper 9, the cold air damper 11, and the shutoff damper 14 are fully closed, and then the first purge damper 17, the second purge damper, and the second purge damper 14 are fully closed.
- the primary cold air (purge fluid) was supplied to the first discharge pipe 4, the second discharge pipe 6, and the third discharge pipe 8 by setting the 19 and the third purge damper 21 to the fully open state. Not limited.
- the first outlet damper 5, the second outlet damper 7, the third outlet damper 9, and the cold air damper 11 are fully closed, but the shutoff damper is used.
- the first purge damper 17, the second purge damper 19, and the third purge damper 21 may be set to the fully open state with the 14 fully open.
- the first purge damper 17, the second purge damper 19, and the third purge damper 21 are provided in each of the first purge pipe 16, the second purge pipe 18, and the third purge pipe 20, respectively. Not limited to this.
- the suction port is connected to the cold air supply pipe 10
- the discharge port is the first purge pipe 16, the second purge pipe 18, and the third.
- a single purge damper connected to each end of the purge pipe 20 may be provided.
- the first outlet damper 5, the second outlet damper 7, and the third outlet damper 9 are set to the fully closed state (step S3), and then the cold air damper 11 is set. Is set to the fully closed state (step S4), and finally the cutoff damper 14 is set to the fully closed state (step S5).
- the order of the dampers set in the fully closed state is not limited to this, and may be another order.
- the primary cold air is taken out from the front of the sealed air supply pipe 12 as a purging fluid and used in the first discharge pipe 4, the second discharge pipe 6, and the third discharge pipe 8.
- the invention is not limited to this.
- the primary cold air (purging fluid) may be taken out from the intermediate portion of the sealed air supply pipe 12 and supplied to the first discharge pipe 4, the second discharge pipe 6, and the third discharge pipe 8.
- primary cold air (purging fluid) may be taken out from between the seal air damper 13 and the shutoff damper 14.
- a crusher 1 Pellet bunker (main body) 2 Wood feeder (main body) 3 Pellet mill (main body) 4 First discharge pipe (discharge pipe) 5 1st outlet damper 6 2nd discharge pipe (discharge pipe) 7 2nd outlet damper 8 3rd discharge pipe (discharge pipe) 9 3rd outlet damper 10 Cold air supply pipe 11 Cold air damper 12 Sealed air supply pipe 13 Sealed air damper 14 Shutoff damper 15 Check valve 16 1st purge pipe 17 1st purge damper 18 2nd purge pipe 19 2nd purge damper 20th 3 Purge pipe 21 3rd purge damper 22 Hot air supply pipe 23 Primary air damper 24 Crushing control device
Abstract
Description
ーナに木粉を燃料として供給する。第2排出管6は、第2群バーナを構成する複数の燃料バーナに木粉を燃料として供給する。第3排出管8は、第3群バーナを構成する複数の燃料バーナに木粉を燃料として供給する。
(1)上記実施形態では、木質系バイオマスを被粉砕物とし、当該木質系バイオマスを粉砕することによって木粉を粉砕物として生成する粉砕装置A(バイオマスミル)について説明したが、本発明は様々な被粉砕物を粉砕する場合に適用することが可能である。少なくとも本発明は、石炭を被粉砕物とし、微粉炭を粉砕物として生成する粉砕装置にも適用可能である。
1 ペレットバンカ(本体)
2 給木機(本体)
3 ペレットミル(本体)
4 第1排出管(排出管)
5 第1出口ダンパ
6 第2排出管(排出管)
7 第2出口ダンパ
8 第3排出管(排出管)
9 第3出口ダンパ
10 冷空気供給管
11 冷空気ダンパ
12 シール空気供給管
13 シール空気ダンパ
14 遮断ダンパ
15 逆止弁
16 第1パージ管
17 第1パージダンパ
18 第2パージ管
19 第2パージダンパ
20 第3パージ管
21 第3パージダンパ
22 熱空気供給管
23 一次空気ダンパ
24 粉砕制御装置
Claims (7)
- 本体で粉砕した粉砕物を少なくとも1つの排出管を介して供給先に供給する粉砕装置であって、
前記本体とは個別に設けられ、前記本体が停止した場合に前記少なくとも1つの排出管に所定のパージ用流体を供給するパージ流体供給部を備える粉砕装置。 - 前記パージ用流体は、前記本体に供給される一次冷空気である請求項1に記載の粉砕装置。
- 前記パージ流体供給部は、前記一次冷空気を前記本体に供給する冷空気供給管から前記一次冷空気を取出して、取り出された一次冷空気を前記少なくとも1つの排出管に供給する請求項2に記載の粉砕装置。
- 前記冷空気供給管には、前記本体の回転部を保護するシール空気を取出すシール空気供給管が接続されており、
前記パージ流体供給部は、前記冷空気供給管において前記シール空気供給管の手前から前記一次冷空気を取出す請求項3に記載の粉砕装置。 - 前記少なくとも1つの排出管は、複数の排出管を含み、
前記パージ流体供給部は、前記複数の排出管に対して流量調節した状態で前記パージ用流体をそれぞれ供給する請求項1~4のいずれか一項に記載の粉砕装置。 - 前記本体は、木質系バイオマスを粉砕することにより前記粉砕物として木粉を生成する請求項1~5のいずれか一項に記載の粉砕装置。
- 本体で粉砕した粉砕物を供給先に供給する排出管から残留粉砕物をパージする方法であって、
前記本体が停止した場合に、前記本体とは個別に設けられたパージ流体供給部から所定のパージ用流体を前記排出管に供給することを含む、方法。
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AU2021311157A AU2021311157B2 (en) | 2020-07-20 | 2021-06-03 | Crushing apparatus and method for purging crushed material |
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5949425A (ja) * | 1982-09-13 | 1984-03-22 | Babcock Hitachi Kk | 微粉炭燃焼制御方法 |
JPS5969161A (ja) * | 1982-10-15 | 1984-04-19 | バブコツク日立株式会社 | 石炭粉砕装置の制御方法 |
JPH09267047A (ja) * | 1996-04-01 | 1997-10-14 | Ishikawajima Harima Heavy Ind Co Ltd | 微粉炭ミルのシール流体供給装置 |
JP2000130740A (ja) * | 1998-10-21 | 2000-05-12 | Ishikawajima Harima Heavy Ind Co Ltd | 石炭焚ボイラにおけるミルの微粉炭管パージ方法 |
JP2008082651A (ja) * | 2006-09-28 | 2008-04-10 | Mitsubishi Heavy Ind Ltd | 石炭・バイオマス混焼システム及び混焼方法 |
Family Cites Families (1)
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CN203750644U (zh) * | 2014-03-21 | 2014-08-06 | 山东省农业机械科学研究院 | 气流超微粉碎系统 |
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- 2021-06-03 WO PCT/JP2021/021280 patent/WO2022018982A1/ja active Application Filing
- 2021-06-03 AU AU2021311157A patent/AU2021311157B2/en active Active
- 2021-06-03 JP JP2022538619A patent/JPWO2022018982A1/ja active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5949425A (ja) * | 1982-09-13 | 1984-03-22 | Babcock Hitachi Kk | 微粉炭燃焼制御方法 |
JPS5969161A (ja) * | 1982-10-15 | 1984-04-19 | バブコツク日立株式会社 | 石炭粉砕装置の制御方法 |
JPH09267047A (ja) * | 1996-04-01 | 1997-10-14 | Ishikawajima Harima Heavy Ind Co Ltd | 微粉炭ミルのシール流体供給装置 |
JP2000130740A (ja) * | 1998-10-21 | 2000-05-12 | Ishikawajima Harima Heavy Ind Co Ltd | 石炭焚ボイラにおけるミルの微粉炭管パージ方法 |
JP2008082651A (ja) * | 2006-09-28 | 2008-04-10 | Mitsubishi Heavy Ind Ltd | 石炭・バイオマス混焼システム及び混焼方法 |
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AU2021311157B2 (en) | 2023-12-14 |
CN115243793A (zh) | 2022-10-25 |
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