WO2019059063A1 - Broyeur de biomasse - Google Patents

Broyeur de biomasse Download PDF

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Publication number
WO2019059063A1
WO2019059063A1 PCT/JP2018/033806 JP2018033806W WO2019059063A1 WO 2019059063 A1 WO2019059063 A1 WO 2019059063A1 JP 2018033806 W JP2018033806 W JP 2018033806W WO 2019059063 A1 WO2019059063 A1 WO 2019059063A1
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WO
WIPO (PCT)
Prior art keywords
biomass
housing
classifier
mill
rotary
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2018/033806
Other languages
English (en)
Japanese (ja)
Inventor
洋輔 大西
相澤　孝
淳 鹿島
豊 竹野
光輝 松▲崎▼
祐樹 近藤
浩明 金本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Power Ltd
Original Assignee
Mitsubishi Hitachi Power Systems Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Hitachi Power Systems Ltd filed Critical Mitsubishi Hitachi Power Systems Ltd
Priority to CN201880039482.8A priority Critical patent/CN110740815B/zh
Priority to KR1020197036201A priority patent/KR102302031B1/ko
Publication of WO2019059063A1 publication Critical patent/WO2019059063A1/fr
Priority to PH12020500196A priority patent/PH12020500196A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • B02C23/02—Feeding devices

Definitions

  • the present invention relates to a biomass mill that pulverizes woody biomass to produce biomass particles that can be used as boiler fuel.
  • a housing that forms a classification chamber, a classifier provided in the upper part of the classification chamber, and a crushing table provided in the lower part of the classification chamber and driven by a table drive device
  • a plurality of pressure roller units each having a pressure roller pressed against the crushing table, an outlet for ejecting primary air from the periphery of the crushing table, and a chute for supplying woody biomass to the center of the crushing table
  • a contraction portion wherein the contraction portion includes an inner contraction portion surrounding the chute, and an outer contraction portion provided at a position facing the inner contraction portion on the inner peripheral surface of the housing.
  • Patent Document 1 since the conventional biomass mill is configured as described above, the powder flow in the wood-based biomass is accelerated through the contraction portion, so that the powder in the classification chamber Residence time is shortened, so that the rise of the mill differential pressure is suppressed and the grinding capacity can be increased, the deposition of the powder on the inner contraction portion is prevented, and the powder is prevented from remaining in the classification chamber Safety can be improved. Moreover, according to Patent Document 1, it is supposed that the biomass mill can be implemented at low cost without major improvement or equipment change by using a pulverizer based on a coal mill for pulverizing coal.
  • a contraction flow portion having a contraction flow passage capable of passing only biomass particles crushed to a size of about 1 to 2 mm is formed between the grinding table and the classifier.
  • coarse-grained particles with large particle size and woody biomass blown up by primary air without being crushed it is made to collide with the lower surface of the constriction part, separated from the powder flow, and dropped again onto the grinding table It has become.
  • an object of the present invention is to provide a biomass mill capable of grinding woody biomass efficiently and safely.
  • a rotary table disposed at a lower portion of a housing, a grinding roller for grinding woody biomass between the rotary table, the rotary table, and the housing
  • a primary chute outlet provided between the two, a center chute for supplying woody biomass which is a raw material to the center of the upper surface of the rotary table, a rotary classifier disposed at the upper part of the housing, and the housing
  • the rotary classifier comprises a cylindrical inner wall disposed inside the inner wall of the housing, an inner surface of the housing, and an outer surface of the inner wall, the powder flow blown up by the primary air jetted from the outlet.
  • the inner wall is provided with the rough particles of woody biomass that has not passed through the rotary classifier, Characterized in that it is configured to return only the road.
  • the biomass particles crushed between the rotating table and the grinding roller can be efficiently discharged to the outside of the mill, so that the pressure loss in the mill and the grinding power of the wood-based biomass can be suppressed. It can grind and process woody biomass safely.
  • crushing of woody biomass, particularly woody pellets to obtain biomass particles is generally referred to as "crushing”, but in the present specification, it is referred to as "crushing" following the example of a coal mill.
  • FIG. 1 is a cross-sectional view showing an entire configuration of a vertical biomass mill according to an embodiment.
  • the vertical biomass mill 1 according to the embodiment uses woody biomass which is a raw material between the rotary table 3 rotationally driven in the horizontal plane by the table driving device 2 and the rotary table 3.
  • a grinding roller 4 for crushing and producing biomass particles as an object a center chute 5 disposed above the rotary table 3 and supplying woody biomass to the center of the upper surface of the rotary table 3, an outer periphery of the center chute 5 , A stationary classifier 7 disposed on the outer periphery of the rotational classifier 6, a bounce plate 8 disposed on the outer periphery of the stationary classifier 7, a rotational classifier 6 and a stationary classifier And a distribution unit 9 for conveying the biomass particles classified in 7 to a predetermined supply destination.
  • the rotary table 3, the grinding roller 4, the rotary classifier 6 and the fixed classifier 7 are accommodated in a cylindrically formed housing 11, and the upper end of the housing 11 is connected to the distribution unit 9. .
  • an internal wall 12 for preventing the return of coarse particles from the rotary classifier 6 and the fixed classifier 7 to the rotary table 3 is disposed between the grinding roller 4 and the rotary classifier 6 concentrically with the housing 11. ing.
  • annular channel 13 which is a channel of a powder stream containing biomass particles is formed.
  • a primary air outlet 15 provided with a rotary throat vane 14 is provided between the outer peripheral surface of the rotary table 3 and the inner surface of the housing 11.
  • the primary air is supplied from the primary air duct 16, the flow velocity and the wind direction are adjusted by the rotary throat vanes 14, and the primary air is injected from the outlet 15 into the housing 11.
  • the primary air temperature is adjusted to, for example, 150 ° C., which is lower than that of the coal mill.
  • a ring-shaped recessed groove 3 a having a width capable of receiving the grinding roller 4 is formed on the upper surface of the rotary table 3 concentrically with the rotation center of the rotary table 3. Therefore, when the rotary table 3 is rotationally driven by the table driving device 2, the grinding roller 4 is rolled in the concave groove 3a, whereby the wood-based biomass which is the raw material is crushed and the biomass particles which are the target are manufactured. Ru.
  • wood-based biomass can be used, but by crushing, biomass particles with a uniform size of about 1 mm to 2 mm can be obtained. Is particularly preferred.
  • the grinding roller 4 is rotatably attached to the roller bracket 21, and the roller bracket 21 is supported by the pressure frame 23 via the roller pivot 22.
  • the pressing frame 23 is connected to the pressing rod 26 of the pressing cylinder 25 whose one end is connected to a predetermined fixing portion via the pressing arm 24. Therefore, the grinding roller 4 is moved up and down through the pressure rod 26, the pressure arm 24, the pressure frame 23, the roller pivot 22 and the roller bracket 21 by driving the pressure cylinder 25, thereby The grinding load acting between the rotary table 3 and the grinding roller 4 is adjusted.
  • the grinding roller 4 is provided in the circumferential direction of the rotary table 3 in plurality (in many cases, three).
  • pulverization is an example, Comprising: This invention is not limited to this.
  • the form of the pulverizer is not limited to a roller, and may be a ball. Also in the mode of pressurization, as long as the crusher is pushed downward and the crushing load acts on the concave groove 3a, such as the rotation shaft of the roller, the operation of the component and each element is irrelevant.
  • the center chute 5 has an upper end attached to the distribution unit 9 and a lower end inserted into the inner wall 12.
  • the rotary classifier 6 is configured by arranging a large number of fins 6a at predetermined intervals in the circumferential direction, and classification of biomass particles is performed by rotationally driving these fins 6a with a motor (not shown). It is supposed to be. The particle size distribution of the biomass particles is adjusted by the number of revolutions of the fins 6a.
  • the bottom plate is a fin support annular plate 6 b for raising the fins 6 a.
  • the rotary classifier 6 has a function of evenly distributing biomass particles to each of a plurality of (only one is shown in FIG. 1) transport pipes 9a provided in the distribution unit 9.
  • the fixed classifier 7 has a large number of non-rotating fins arranged at predetermined intervals in the circumferential direction, and classifies biomass particles in the powder flow by applying powder flow to the fins.
  • the bounce plate 8 bounces the biomass particles blown up above the rotary classifier 6 and the fixed classifier 7 through the inside of the annular channel 13 and guides the biomass particles to the rotary classifier 6 and the fixed classifier 7. It also functions as a contraction member for adjusting the flow rate of the powder flow flowing into the machine 6 and the fixed classifier 7.
  • the flow velocity of the powder flow flowing into the rotary classifier 6 and the fixed classifier 7 is adjusted to, for example, about 10 m / sec by the bounce plate 8.
  • the distribution unit 9 is provided with a transfer pipe 9 a for transferring the biomass particles produced by the vertical biomass mill 1 to a predetermined transfer destination.
  • a transfer destination of biomass particles there are a biomass-combustion boiler or a biomass-combustion boiler that mixes and burns wood-based biomass and coal.
  • the distribution part 9 is equipped with the several conveyance pipe 9a, in order to equalize introduction of the biomass particle
  • the housing 11 is formed in a cylindrical shape that can accommodate the rotary table 3, the grinding roller 4, the rotary classifier 6, the fixed classifier 7 and the bounce plate 8, but in order to facilitate maintenance of the vertical biomass mill 1,
  • it can also be configured with a combination of a plurality of members that can be disassembled, such as the upper housing, the middle housing, and the lower housing.
  • the inner wall 12 extends from the upper end portion to which the ring member 31 is attached to the ring member 31 disposed opposite to the fin support annular plate 6 b of the rotary classifier 6 downward. Therefore, it comprises an upper conical portion 32 having a larger diameter, a cylindrical portion 33 connected to the lower end of the upper conical portion 32, and a plurality of detachable plates 34 detachably connected to the lower end of the cylindrical portion 33. ing.
  • the internal wall 12 is disposed between the rotary table 3 and the rotary classifier 6 inside the housing 11, as shown in FIG.
  • the inner wall 12 is attached to the housing 11 using a fixing member (not shown) extending from the inner surface of the housing 11.
  • a slight clearance d is provided between the fin support annular plate 6 b and the ring member 31 in order to prevent interference between the rotary classifier 6 and the inner wall 12.
  • the size of the clearance d is set to about 2 mm to 8 mm in order to keep the flow path resistance of the flow path from the inside to the outside of the inner wall 12 large. Thereby, it is possible to prevent the biomass particles from invading between the fin support annular plate 6 b and the ring member 31, and to prevent galling of the fin support annular plate 6 b and the ring member 31 by the biomass particles.
  • a pressure arm through hole 35 for penetrating the pressure arm 24 is formed in the cylindrical portion 33, and a maintenance door 36 for enabling loading and unloading of the grinding roller 4 during maintenance can be opened and closed. Be equipped.
  • a maintenance door 36 for enabling loading and unloading of the grinding roller 4 during maintenance can be opened and closed.
  • the detachable plate 34 is attached to the cylindrical portion 33 after the pressure arm 24 penetrates into the pressure arm through hole 35, and an access door 37 which a person enters and leaves at the time of maintenance is opened and closed in part thereof. It is equipped to be possible. Thus, by configuring the cylindrical portion 33 and the detachable plate 34 as separate members, the installation of the inner wall 12 in the housing 11 becomes possible. Further, by providing the access door 37 on the desorption plate 34, the operator can enter the vertical biomass mill 1 and maintenance of the grinding roller 4 and the like can be performed.
  • the desorption plate 34 has a function of guiding the biomass particles blown up by the primary air into the annular channel 13.
  • the detachable plate 34 is disposed on the outer peripheral side of the grinding roller 4 so as to overlap at least a part of the grinding roller 4, and more preferably the lower end portion covers up to a lower portion than the rotation center of the grinding roller 4 Configured as.
  • the woody biomass A supplied from the center chute 5 falls to the center of the rotary table 3 as shown by the arrow in FIG. 1 and then spirals on the rotary table 3 by the centrifugal force accompanying the rotation of the rotary table 3 It moves to the outer peripheral part by drawing the locus of and enters into the concave groove 3a.
  • the wood-based biomass A that has entered the inside of the concave groove 3a is bitten between the rotary table 3 and the grinding roller 4 in the form of a tire and is ground to become biomass particles.
  • the produced biomass particles are blown up while being dried by the primary air blown out into the housing 11 from the outlet 15 and are introduced into the annular channel 13 as a powder flow B containing biomass particles. Ru.
  • the powder flow B moves upward while spirally rotating in the annular flow passage 13, and the flow passage along the upper conical portion 32 provided on the inner wall 12 is on the rotary classifier 6 and fixed classifier 7 side. Change to
  • biomass particles having passed through the annular flow channel 13 biomass particles of the appropriate size directly enter the distribution unit 9 through the rotary classifier 6 or the fixed classifier 7. Further, among the biomass particles that have passed through the annular flow channel 13, the fine particles hit the bounce plate 8 and then enter the distribution unit 9 through the rotary classifier 6 or the fixed classifier 7. On the other hand, among the biomass particles having passed through the annular flow channel 13, the coarse particles C can not pass through the rotary classifier 6 or the fixed classifier 7, and are guided by the upper conical portion 32 provided on the inner wall 12 It returns to the annular flow path 13.
  • the coarse particles returned into the annular flow channel 13 move up and down in the annular flow channel 13 due to the balance between their own weight and the blowing-up force of the primary air, and they are finely crushed in the meantime, eventually the rotary classifier 6 or fixed. It enters into the distribution unit 9 through the classifier 7. That is, the annular flow path 13 functions as a gravity classifier of biomass particles.
  • the vertical biomass mill 1 according to the embodiment is provided with the inner wall 12 between the rotary table 3 and the rotary classifier 6, and the coarse particles C which do not pass through the rotary classifier 6 or the fixed classifier 7 Is returned into the annular flow passage 13 formed between the inner surface of the housing 11 and the outer surface of the inner wall 12, so that the coarse particles C can be prevented from returning onto the rotary table 3.
  • the vertical biomass mill 1 according to the embodiment has a one-through structure in which biomass particles crushed between the rotary table 3 and the grinding roller 4 are discharged to the distribution unit 9 through only the annular flow channel 13 Therefore, the coarse particles C can be reliably prevented from returning onto the rotary table 3.
  • the vertical biomass mill 1 of the embodiment since the wood-based biomass A more than the amount set in advance is not retained on the rotary table 3, the power required to crush the wood-based biomass can be suppressed and the mill Internal pressure loss can also be suppressed. Furthermore, according to the vertical biomass mill 1 of the embodiment, the concentration increase of volatile components in the mill can also be prevented.
  • pulverization power value of the vertical biomass mill 1 which concerns on embodiment in FIG. 4 is shown compared with the conventional vertical biomass mill which is not equipped with the internal wall 12.
  • the conventional vertical biomass mill a large amount of wood-based biomass A tends to stay on the rotary table 3, and when a large amount of wood-based biomass A stays on the rotary table 3, the crushing power increases rapidly. It is difficult to raise Therefore, in FIG. 4, the comparison is made at the time of comparable low load operation.
  • the crushing power varies widely depending on the type of woody biomass as the raw material and the operating conditions of the mill, but according to the data of FIG. 4, the crushing power value of the vertical biomass mill 1 according to the embodiment is the conventional vertical shape. It is 0.42 to 0.63 times the grinding power value of the biomass mill. From this data, it can be said that the vertical biomass mill 1 according to the embodiment can significantly suppress the grinding power as compared with the conventional vertical biomass mill.
  • the pressure loss value of the vertical biomass mill 1 according to the embodiment is shown in FIG. 5 in comparison with a conventional vertical biomass mill without the internal wall 12. Also in this graph, the pressure loss value of the vertical biomass mill 1 according to the embodiment is shown as a relative value when the pressure loss value of the conventional vertical biomass mill is "1". In addition, it is a comparison at the time of comparable low load operation.
  • the pressure loss in the mill also varies widely depending on the type of woody biomass that is the raw material and the operating conditions of the mill, but according to the data in FIG. 5, the pressure loss value of the vertical biomass mill 1 according to the embodiment is The pressure drop value of the vertical biomass mill is 0.37 to 0.67 times. From this data, it can be said that the vertical biomass mill 1 according to the embodiment can significantly suppress the pressure loss as compared with the conventional vertical biomass mill.
  • pulverization power characteristic and pressure loss characteristic with respect to biomass supply load of the vertical biomass mill 1 which concerns on embodiment, and the conventional vertical biomass mill which is not equipped with the internal wall 12 are compared and shown.
  • the vertical biomass mill 1 according to the embodiment has stable grinding power characteristics and pressure loss characteristics against fluctuations in biomass supply load, and a wide range of operation from low load to high load Is possible.
  • conventional vertical biomass mills can only operate at low loads. From this data, it can be said that the vertical biomass mill 1 according to the embodiment is capable of high-load operation and has a high ability to produce biomass particles.
  • the vertical biomass mill 1 of the present invention is characterized in that an inner wall 12 for restricting the return of coarse particles C to the rotary table 3 is installed in the housing 11, and the other parts are the same as above.
  • the present invention is not limited to the embodiment, and can be changed as appropriate.
  • the vertical biomass mill 1 of the present invention can be configured by modifying a conventionally known coal mill, but is not limited thereto.
  • wood-based biomass is crushed in the embodiment, coal and wood-based biomass can also be mixed and crushed.
  • woody biomass when coal and woody biomass are mixed and crushed, woody biomass can be mixed at a high ratio.
  • the inner wall 12 is configured to be removable from the housing 11, the inner wall 12 is removed from the housing 11 and rotational classification is performed on the lower portion of the rotary classifier 6. It can also be used as a coal mill by providing a hopper for returning coarse particles C which have not passed through the machine 6 or the fixed classifier 7 to the central portion of the rotary table 3.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)

Abstract

L'invention concerne un broyeur de biomasse pouvant broyer efficacement et sans danger une biomasse ligneuse. Une paroi interne (12) est placée à l'intérieur d'une enveloppe (11) comportant un plateau tournant (3), un cylindre de broyage (4) et un classificateur rotatif (6). Un canal annulaire (13) destiné à guider, vers le classificateur rotatif (6), des particules de biomasse soufflées au moyen d'un air primaire, est formé entre une surface interne de l'enveloppe (11) et une surface externe de la paroi interne (12). La paroi interne (12) ne renvoie pas les grosses particules (C) refusées par le classificateur rotatif (6) vers le plateau tournant (3) mais plutôt vers le canal annulaire (13), amenant ainsi le canal annulaire (13) à fonctionner en tant que classificateur gravitationnel. Cette configuration empêche le dépôt de grandes quantités de biomasse ligneuse sur le plateau tournant (3).
PCT/JP2018/033806 2017-09-19 2018-09-12 Broyeur de biomasse Ceased WO2019059063A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201880039482.8A CN110740815B (zh) 2017-09-19 2018-09-12 生物质研磨机
KR1020197036201A KR102302031B1 (ko) 2017-09-19 2018-09-12 바이오매스 밀
PH12020500196A PH12020500196A1 (en) 2017-09-19 2020-01-27 Biomass mill

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017179255A JP6500066B2 (ja) 2017-09-19 2017-09-19 バイオマスミル
JP2017-179255 2017-09-19

Publications (1)

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WO2019059063A1 true WO2019059063A1 (fr) 2019-03-28

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PCT/JP2018/033806 Ceased WO2019059063A1 (fr) 2017-09-19 2018-09-12 Broyeur de biomasse

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JP (1) JP6500066B2 (fr)
KR (1) KR102302031B1 (fr)
CN (1) CN110740815B (fr)
PH (1) PH12020500196A1 (fr)
TW (1) TWI687261B (fr)
WO (1) WO2019059063A1 (fr)

Families Citing this family (2)

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Publication number Priority date Publication date Assignee Title
JP7372595B2 (ja) * 2020-02-20 2023-11-01 Ｕｂｅマシナリー株式会社 竪型粉砕機
JP7615796B2 (ja) * 2021-03-18 2025-01-17 Ｕｂｅマシナリー株式会社 竪型粉砕機及びその粉砕ローラの診断方法

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JPS6452549U (fr) * 1987-09-22 1989-03-31
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JP2013180240A (ja) * 2012-03-01 2013-09-12 Ihi Corp バイオマスミル
JP2015205245A (ja) * 2014-04-21 2015-11-19 三菱日立パワーシステムズ株式会社 分級装置及びそれを備えた竪型粉砕分級装置
JP2018027513A (ja) * 2016-08-16 2018-02-22 株式会社Ihi 竪型ローラミル

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JPH0655088A (ja) * 1992-08-04 1994-03-01 Mitsubishi Heavy Ind Ltd 竪型ローラミル
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CN2737463Y (zh) * 2004-06-08 2005-11-02 郭长岭 一种辊式中速磨煤机
JP5581714B2 (ja) * 2010-02-04 2014-09-03 株式会社Ｉｈｉ バイオマスミル
JP5645468B2 (ja) * 2010-05-14 2014-12-24 三菱重工業株式会社 バイオマス粉砕装置及びバイオマス・石炭混焼システム
CN104998726A (zh) * 2015-08-18 2015-10-28 芜湖奕辰模具科技有限公司 一种锅炉磨煤机
JP6627337B2 (ja) 2015-09-03 2020-01-08 株式会社Ihi バイオマスミル
CN205269787U (zh) * 2015-11-25 2016-06-01 信丰县包钢新利稀土有限责任公司 雷蒙磨粉机

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Publication number Priority date Publication date Assignee Title
JPS6452549U (fr) * 1987-09-22 1989-03-31
JPH0560534U (ja) * 1992-01-22 1993-08-10 石川島播磨重工業株式会社 竪形ミル
JP2013180240A (ja) * 2012-03-01 2013-09-12 Ihi Corp バイオマスミル
JP2015205245A (ja) * 2014-04-21 2015-11-19 三菱日立パワーシステムズ株式会社 分級装置及びそれを備えた竪型粉砕分級装置
JP2018027513A (ja) * 2016-08-16 2018-02-22 株式会社Ihi 竪型ローラミル

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Publication number Publication date
CN110740815B (zh) 2021-08-03
KR102302031B1 (ko) 2021-09-14
KR20200005616A (ko) 2020-01-15
JP6500066B2 (ja) 2019-04-10
JP2019051500A (ja) 2019-04-04
TW201919764A (zh) 2019-06-01
TWI687261B (zh) 2020-03-11
CN110740815A (zh) 2020-01-31
PH12020500196A1 (en) 2020-09-14

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