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WO2018155505A1 - Dispositif de levage de tuyau pour four rotatif - Google Patents

Dispositif de levage de tuyau pour four rotatif Download PDF

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Publication number
WO2018155505A1
WO2018155505A1 PCT/JP2018/006285 JP2018006285W WO2018155505A1 WO 2018155505 A1 WO2018155505 A1 WO 2018155505A1 JP 2018006285 W JP2018006285 W JP 2018006285W WO 2018155505 A1 WO2018155505 A1 WO 2018155505A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipe
pipe lifter
rotary kiln
lifter
angle
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/JP2018/006285
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English (en)
Japanese (ja)
Inventor
阿部　隆一
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.)
Environment And Energy Research And Development LLC
Original Assignee
Environment And Energy Research And Development LLC
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 Environment And Energy Research And Development LLC filed Critical Environment And Energy Research And Development LLC
Publication of WO2018155505A1 publication Critical patent/WO2018155505A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B11/00—Making pig-iron other than in blast furnaces
    • C21B11/06—Making pig-iron other than in blast furnaces in rotary kilns
    • 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
    • F27B7/14—Rotary-drum furnaces, i.e. horizontal or slightly inclined with means for agitating or moving the charge
    • F27B7/16—Rotary-drum furnaces, i.e. horizontal or slightly inclined with means for agitating or moving the charge the means being fixed relatively to the drum, e.g. composite means
    • 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
    • F27B7/14—Rotary-drum furnaces, i.e. horizontal or slightly inclined with means for agitating or moving the charge
    • F27B7/18—Rotary-drum furnaces, i.e. horizontal or slightly inclined with means for agitating or moving the charge the means being movable within the drum
    • 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 specially adapted for rotary-drum furnaces
    • F27B7/28—Arrangements of linings

Definitions

  • the present invention is a rotary kiln that requires a refractory insulation structure for a furnace shell and is used at a high temperature in the furnace, and the particle size of the treated product is adjusted, and the particle size of the treated product does not expand to coarse particles with heat treatment. Or, it is mainly applied to a rotary kiln characterized in that the processed material does not partially melt.
  • rotary kilns used in alloy iron manufacturing facilities, rotary kiln smoldering furnaces used in pretreatment for metal refining, rotary kilns used in dry distillation, gasification or carbonization, rotary kilns used in calcining inorganic substances or coke? Baking furnaces are applicable.
  • the present invention relates to an internal structure of a rotary kiln which is strongly required to promote a high temperature reaction of a processed product, particularly when the inside of the rotary kiln has a reducing atmosphere or an ultrahigh temperature atmosphere.
  • the agitation of the treated material is superior to the agitation effect of only the rotation of the rotary kiln without lifter.
  • the effect of solid dispersion in the gas in the rotary kiln can hardly be expected.
  • the practical operating temperature is at most about 600 to 700 ° C. or less.
  • the rotational front cutting surface of the pipe lifter 3 is opened to allow the processing object to penetrate and the rotational rear cutting of the pipe lifter 3 Face closed,
  • the pipe lifter 3 is inclined by reverse spiral, or when giving the forward transfer effect to the workpiece conveyance, the pipe lifter 3 is inclined by forward spiral or If neither resistance nor propulsion is caused in object transport, the pipe lifter 3 is not inclined in the circumferential direction, that is, the installation angle is 90 degrees, And a component whose installation center angle ⁇ of the pipe lifter 3 is less than or equal to the center angle ⁇ of the processing object, And, when the installation angle of the pipe lifter 3 with respect to the rotary kiln discharge direction is made equal to or less than the repose angle of the processing object, the processing object scraped by a part of the outer
  • the pipe lifter 3 is reversed with the rotation of the rotary kiln, and the treated material in the pipe lifter 3 is The substance falls openly into the gas in the rotary kiln, and the individual disperses in the gas.
  • the pipe lifter 3 when the processed material is scooped into the pipe lifter 3, the inclination by the reverse spiral of the pipe lifter 3 protruding into the furnace exerts a reverse transport effect on the processed material flow, and the processed material partially stagnates. , The pipe lifter 3 can be inserted efficiently. In the case of a processed product having a high reaction speed, or when the inclination of the rotary kiln is small or horizontal, the pipe lifter 3 can be transported forward without stagnation by arranging it in a positive spiral.
  • the particles of the processing product are squeezed on the outer peripheral surface of the pipe lifter 3 protruding inside the rotary kiln when the installation angle of the pipe lifter 3 with respect to the rotary kiln discharge direction
  • a plurality of pipe lifter nozzles 5 of appropriate diameter are provided.
  • the treated material is scooped off from the pipe lifter nozzle 5 provided in the pipe lifter 3 along with the rotation of the rotary kiln before it is lifted to the top of the furnace by the rotation of the rotary kiln.
  • the in-gas individual dispersion effect is further improved.
  • the pipe lifter 3 When setting the installation angle of the pipe lifter 3 to the rotary kiln discharge direction at 90 degrees, the pipe lifter 3 is a reducer type, and it is characterized in that it is a single pipe with the expansion side scooping side and the contraction side bottom side. There is.
  • the pipe lifter 3 is a reducer type single pipe which has the expansion side as the scooping side and the reduction side as the bottom side.
  • the pipe lifter 3 is made of a heat-resistant metal, and the fixing thereof is generally fixed to an anchor embedded in a refractory and configured as an integral unit. However, due to the difference in high temperature physical properties between the refractory and the metal, a repulsive force is generated between them, which tends to lead to spalling of the refractory and cracking of the metal.
  • the pipe lifter 3 is replaceably fixed by the fixing bolt 4 installed on the rotary kiln shell 1. As a result, the main fixation of the pipe lifter 3 is achieved by the shell structure, and no force external force from the pipe lifter 3 acts on the refractory 2.
  • the refractory 2 main body is not subjected to an excessive external force.
  • the pipe lifter 3 can be fixed to the embedded hole, which leads to the protection of the pipe lifter 3 mounting bracket and the refractory 2 main body.
  • the pipe lifter 3 is inclined by the reverse spiral so as to give resistance to the processing material conveyance of the rotary kiln as a means for increasing the processing object central angle ⁇ on the upstream side of the pipe lifter 3.
  • the reverse feed pipe chute 6 for circulating the processed material from the downstream side of the pipe lifter 3 to the upstream side of the pipe lifter 3 is opened at both ends thereof to form a reverse spiral.
  • the processed product is transported backward by the effect that the in-furnace projecting portion outside the reverse delivery pipe chute 6 is a reverse spiral.
  • the mounting method is preferably the same method as the pipe lifter 3 of claim 4. When the reverse feed pipe chute 6 becomes long, it is divided into a plurality.
  • the blade 10a is provided in the axial direction of the pipe lifter on the surface projecting from the wall of the pipe lifter 3 installed at the repose angle or less Whether the blade 10a is provided in the rotary kiln axial direction on the surface protruding from the wall surface of the lifter 3, or the blade 10b is provided in the axial direction of the pipe lifter, Alternatively, by providing the blade 10a in the rotary kiln axial direction on the surface projecting from the wall surface of the reverse feed pipe chute 6, or by providing the blade 10b in the reverse feed pipe chute axial direction, addition of a scraping function by the blade 10a, or the blade 10b By the addition of the treated product reverse transfer effect by the above, the lifting capacity of the pipe lifter 3 can be further increased.
  • the processed material not caught in the inside of the pipe lifter 3 can be scooped up by the blade 10 a provided on the surface protruding from the wall surface of the pipe lifter 3. Further, as a result of increasing the reverse feed effect of the projection from the wall surface of the reverse spiral pipe lifter or the reverse feed pipe chute by the height of the blade 10b, the reverse feed amount of the processing object increases and the processing object central angle ⁇ growing. Thus, the amount of scraping outside the pipe lifter can be added to the amount of scraping inside the pipe lifter.
  • a lifter excellent in solid-in-gas dispersion efficiency can be applied to a high-temperature rotary kiln.
  • the high temperature rotary kiln has a lining structure with a fireproof insulation material.
  • the solid-gas contact efficiency is poor, and the length of the rotary kiln is lengthened to cope with the reaction time.
  • the stirring is improved and the heat transfer efficiency is improved. Air contact efficiency is still low.
  • the treated material can not be scraped up to the top of the rotary kiln due to structural limitations due to the restriction of the toughness of the refractory, and the treated material can not be dispersed in the gas.
  • the refractory protruding into the furnace is susceptible to spalling and has a short life.
  • many attempts have been made to construct the lifter with a heat-resistant metal plate, but due to differences in the high-temperature properties of the refractory and the heat-resistant metal, repulsive force is generated between them, and the refractories are damaged by the high temperature distortion of the heat-resistant metal.
  • the processed material can be scraped up to the upper portion of the rotary kiln by contacting or embedding the pipe lifter 3 made of a heat-resistant metal in the rotary kiln refractory 2 and scooping the processed material into the pipe. Thereafter, by rotation of the rotary kiln, the pipe lifter is reversed, and the processed material inside the pipe lifter falls and disperses in the gas in the rotary kiln.
  • the heat-resistant metal pipe lifter 3 is considered to be an integral container, can be used up to the heat resistance limit of the material, deformation due to thermal strain is minimized, no problem in practical use, and sufficient function as the high temperature rotary kiln pipe lifter 3 Can be demonstrated.
  • the structure is simple, and the device life can be extended.
  • the rotary kiln refractories 2 are not connected to each other with the pipe lifter 3. When the rotary kiln refractories 2 are installed in contact with the inner wall, the pipe lifter 3 is attached after the construction of the ordinary refractory 2 is completed.
  • Factors that affect the solid dispersion efficiency in the rotary kiln internal gas include the shape, diameter and length of the pipe lifter 3, the diameter and number of the pipe lifter nozzle 5 that opens to the pipe lifter 3 protruding outer surface, and the diameter of the opening 9 of the pipe lifter 3. And quantity, selection and placement of reverse lift installation of pipe lifter 3, forward spiral installation, neutral installation, or rotary kiln axial installation, diameter and quantity of reverse feed pipe chute for reverse feed of processed material, to further increase scraping function
  • FIG. 1A-A arrow (c) arched profile Partially embedded in the refractory with a part of the sectional pipe lifter
  • FIG. 5 BB arrow (It installed in the rotary kiln axial direction (0 inclination angle)).
  • It is a plane development view showing an example of arrangement of a pipe lifter which carried out 360 degrees plane development of the inner wall.
  • A Single-tube pipe lifters installed at an inclination angle of 90 degrees, with reverse feed pipe chutes installed at two locations
  • the pipe lifter is installed in the axial direction (inclination angle is 0 degrees) It is the plane development view which added the blade which intensifies a raking function to the example of arrangement of the pipe lifter which carried out 180 degrees plane deployment of the inner wall from 90 degrees to 270 degrees shown in Drawing 5 and which has it.
  • FIG. 1 is a cross-sectional view showing an overall view of a rotary kiln pipe lifter according to the present invention.
  • the pipe lifter 3 is installed semi-embedded in the circumferential direction of the inner wall of the rotary kiln.
  • the rotational front end of the pipe lifter 3 is provided with an opening for taking in the workpiece, and the rotational rear end is closed.
  • the pipe lifter 3 reaching the treated material layer penetrates the treated material from the front opening thereof, and the material processed by the pipe lifter 3 content integration is crawled.
  • the entrapped treated material is lifted to the upper space by the pipe lifter 3, and gradually starts to swirl into the furnace space as it rotates from the front opening, and the whole is dropped and dissipated into the furnace space in one rotation. .
  • This operation is repeated by the plurality of pipe lifters 3, and the space in the rotary kiln furnace achieves sufficient solid-gas contact between the processing material to be dispersed and the furnace gas, high heat transfer performance, and high reaction efficiency. To be achieved.
  • a cushion mortar or a fire-resistant wool blanket is placed in the gap. Then, the pipe lifter 3 is fixed by the fixing bolt 4 attached to the rotary kiln shell 1.
  • the heat insulation to the mounting part is thermally insulated with heat insulation wool 7.
  • a pipe lifter 3 of a short pipe reducer type shown in FIG. 2 is effective.
  • the reducer portion preferably has, for example, an eccentric two-shaped shape according to JIS B2313-1991.
  • the infiltration opening part connects oblique cutting cylindrical pipes.
  • FIG. 3 (a) In the case of a shape having a contact plane with a wall surface such as a square pipe as shown in FIG. 3 (a), it is also effective to place the surface on the wall surface without semi-embedding. .
  • FIG. 3 (b) and FIG. 3 (c) when the contact with the wall surface is a curved surface, providing the installation hole in the wall surface refractory 2 and installing the pipe lifter 3 adversely affects the refractory 2 Stable fixing is possible while minimizing the
  • a pipe lifter 3 is provided in the rotary kiln axis direction (inclination angle 0 degree).
  • the opening 9 is provided on the side surface of the pipe lifter 3 and serves both as a scooping port of the processing object and a discharge port after being scraped up to the top.
  • the projecting portion in the furnace of the pipe lifter 3 has an effect of scraping the processed material, and if the opening 9 is provided on the scraped side surface, the pipe lifter 3 can be efficiently penetrated.
  • the pipe lifter 3 protruding into the rotary kiln furnace is transported back to the pipe lifter 3 by the reverse feed effect. It is possible to increase the thickness of the processing object layer in the penetration zone, and the penetration volume efficiency of the pipe lifter 3 is significantly improved.
  • a reverse feed pipe chute 6 is provided. The reverse feed pipe chute 6 is open at both forward and reverse rotation, and the reverse transfer effect by the reverse transfer of the reverse feed pipe chute 6 inside and the reverse spiral of the protrusion of the reverse feed pipe chute 6 inside the rotary kiln as described in FIG.
  • the layer thickness of the processing object in the pipe lifter 3 scooping zone can be increased, and the scooping efficiency of the pipe lifter 3 can be improved.
  • the scraping ability of the pipe lifter 3 can be further increased.
  • the blade 10a is provided on the outer surface of the short pipe pipe lifter in the rotary kiln axial direction, and the amount of scraping by the blade 10a is added.
  • the blade 10b in the direction of the back feed pipe chute 6 axis and increasing the overall blade height, the amount of reverse feed is increased.
  • the blade 10a is provided on the outer surface of the reverse spiral pipe lifter in the rotary kiln axial direction, and the amount of scraping by the blade 10a is added.
  • a blade 10 b is provided along the reverse spiral pipe lifter.
  • the protrusion height from the wall surface of the reverse spiral pipe lifter is increased, and the reverse feed amount of the processed material is increased.
  • a blade 10a is provided on the surface of the wall surface protrusion of the pipe lifter at a repose angle or less. As a result, the amount of scraping is increased by the amount of scraping by the blade 10a.
  • Fig. 1, Fig. 2, Fig. 4 and Fig. 5 show examples when the present invention is adopted in a rotary kiln for biomass gasification.
  • the L / D of the rotary kiln is 4 to 7, medium-scale 100 to 200 t / day, and is a co-current internal heat rotary kiln.
  • the raw material is wood chips
  • the first half of the rotary kiln is the preheating drying zone
  • the second half is the thermal decomposition, water gas reaction zone.
  • the treated product in the first half has a large internal friction resistance inherent to the wood chip, and has a grain structure mainly composed of coarse particles.
  • the processed material has a pseudo-aggregate structure, it is not possible to form a smooth flow for penetration into the pipe lifter 3 and for drop radiation, so the inlet opening is as large as possible as shown in FIG.
  • the lifter 3 is preferably a short tube reducer type in order to prevent bridging.
  • the volatile combustible component is gasified by thermal decomposition, and the combustible gas is partially burned and consumed by the drying heat source and the pyrolysis heat source.
  • the residue in the second half is a solid component mainly composed of carbon, and the particle size is fine, the internal friction resistance is small, and the fluidity becomes large. Therefore, even the pipe lifter structure shown in FIG.
  • a wall contact type shown in FIG. 3 (a) or a semi-embedded type shown in FIG. 3 (b) or 3 (c) is adopted.
  • the wall contact type is limited to the case where one flat surface can contact, such as a square pipe, and when the contact part of the pipe lifter 3 is a curved surface, a semi-embedded type is adopted, and the pipe lifter 3 mounting hole of the rotary kiln refractory 2 mutually Install freely so as not to interfere with repulsive force.
  • the fixing of the pipe lifter 3 is all fixed from the steel structure of the rotary kiln shell 1.
  • the cross-sectional shape of the pipe lifter 3 employs a square pipe, a cylindrical pipe, or a processed pipe as shown in FIG. 3 (c).
  • the cylindrical tube type is superior in deformation stability at extremely high temperatures, but it is selected under the conditions of use.
  • FIG. 5 partially shows a 360 ° inner wall development view of the rotary kiln
  • FIG. 5 (b) arranges the pipe lifter 3 in a reverse spiral shape.
  • the thickness of the treatment object in the pipe lifter 3 installation zone increases, the penetration efficiency improves, and the amount of dispersion in gas increases.
  • the reverse feed pipe chute in which both the rotational front and rotational rear are open in the gap of the pipe lifter 3
  • the material to be processed is reversely fed by the reverse feed effect by the reverse feed of the inside of the reverse feed pipe chute 6 and the reverse spiral projection projecting inside the rotary kiln, provided with a reverse helix at a tilt angle of 6 or more.
  • the treated material layer thickness in the inflow zone of the lifter 3 is increased to increase the infiltration efficiency and the air dispersion efficiency.
  • the blades 10a and 10b are added to the surface of the pipe lifter adopted in the first embodiment, which protrudes from the wall surface.
  • the blade 10a is provided on the outer surface of the short pipe pipe lifter in the rotary kiln axial direction, and the amount of scraping by the blade 10a is added.
  • the blades 10b is provided in the direction of the back feed pipe chute 6 axis and increasing the overall blade height, the amount of back feed can be increased.
  • the blade 10a is provided on the outer surface of the reverse spiral pipe lifter in the rotary kiln axial direction, and the amount of scraping by the blade 10a is added.
  • a blade 10 b is provided along the reverse spiral pipe lifter.
  • the blade 10a is provided on the surface of the wall surface protrusion of the pipe lifter at a repose angle or less. As a result, the amount of scraping can be increased by the amount of scraping by the blade 10a.
  • the patented invention can, in particular, meet the following requirements. (1) It is required that a series of processes such as drying, thermal decomposition, water gas reaction, and firing be completed in an integral rotary kiln in a furnace. (2) It is required that the atmosphere in the furnace has a high temperature and the above-mentioned respective processing steps can be performed with high efficiency. (3) Long-term durability of consumable parts is required. (4) It is required that replacement of consumable parts can be easily performed in a short time.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)

Abstract

Une partie de la surface externe de ce dispositif de levage de tuyau, qui est formée de manière à n'avoir aucune interférence mutuelle avec un matériau réfractaire de four rotatif, est en contact avec ou intégrée dans le matériau réfractaire de la paroi interne d'une coque externe de four rotatif, et une autre partie de la surface externe est disposée de façon à faire saillie dans le four rotatif. Si l'angle d'installation du dispositif de levage de tuyau est au moins l'angle de repos d'un matériau à traiter, la section transversale du dispositif de levage de tuyau dans la direction de rotation vers l'avant est ouverte, et la section transversale dans la direction de rotation vers l'arrière est fermée. Si le matériau à traiter doit être doté d'un effet d'alimentation inversée, le dispositif de levage de tuyau est incliné au niveau d'une spirale inversée, et s'il n'y a pas de résistance ou de propulsion pour le transport du matériau à traiter, le dispositif de levage de tuyau n'est pas incliné dans la direction périphérique. L'angle central d'installation du dispositif de levage de tuyau est au plus l'angle central du matériau à traiter. Si l'angle d'installation du dispositif de levage de tuyau est au plus l'angle de repos du matériau à traiter, une pluralité d'ouvertures de pénétration, qui sont destinées à la matière à traiter ayant été raclée par la surface extérieure du dispositif de levage de tuyau faisant saillie dans le four rotatif et qui servent également d'ouvertures de décharge lorsque le matériau à traiter a été aspiré, sont disposées sur la surface externe du dispositif de levage de tuyau. Le dispositif de levage de tuyau, qui est destiné à un four rotatif pour des réactions solides-gaz, disperse efficacement des solides dans un gaz et est suffisamment durable même à des températures élevées.
PCT/JP2018/006285 2017-02-22 2018-02-21 Dispositif de levage de tuyau pour four rotatif Ceased WO2018155505A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017-031053 2017-02-22
JP2017031053A JP6533939B2 (ja) 2017-02-22 2017-02-22 ロータリーキルン用リフター装置

Publications (1)

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WO2018155505A1 true WO2018155505A1 (fr) 2018-08-30

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PCT/JP2018/006285 Ceased WO2018155505A1 (fr) 2017-02-22 2018-02-21 Dispositif de levage de tuyau pour four rotatif

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WO (1) WO2018155505A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5457249A (en) * 1977-10-14 1979-05-08 Nihon Cement Rotary heat exchanger
WO1999044000A1 (fr) * 1998-02-25 1999-09-02 Conoco Inc. Corniere elevatrice ouvree en acier, pour four rotatif
JP2007132552A (ja) * 2005-11-08 2007-05-31 Kyudenko Corp 廃石膏の加熱装置
JP2013167423A (ja) * 2012-02-16 2013-08-29 Kyudenko Corp 二水石膏の加熱処理装置及び混合石膏の製造方法
JP2015210067A (ja) * 2014-04-30 2015-11-24 Jx日鉱日石金属株式会社 リフター、リフターの施工方法およびロータリーキルン

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5457249A (en) * 1977-10-14 1979-05-08 Nihon Cement Rotary heat exchanger
WO1999044000A1 (fr) * 1998-02-25 1999-09-02 Conoco Inc. Corniere elevatrice ouvree en acier, pour four rotatif
JP2007132552A (ja) * 2005-11-08 2007-05-31 Kyudenko Corp 廃石膏の加熱装置
JP2013167423A (ja) * 2012-02-16 2013-08-29 Kyudenko Corp 二水石膏の加熱処理装置及び混合石膏の製造方法
JP2015210067A (ja) * 2014-04-30 2015-11-24 Jx日鉱日石金属株式会社 リフター、リフターの施工方法およびロータリーキルン

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JP6533939B2 (ja) 2019-06-26
JP2018136082A (ja) 2018-08-30

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