[go: up one dir, main page]

WO2018193568A1 - Dispositif de production de combustible et procédé de production de combustible - Google Patents

Dispositif de production de combustible et procédé de production de combustible Download PDF

Info

Publication number
WO2018193568A1
WO2018193568A1 PCT/JP2017/015801 JP2017015801W WO2018193568A1 WO 2018193568 A1 WO2018193568 A1 WO 2018193568A1 JP 2017015801 W JP2017015801 W JP 2017015801W WO 2018193568 A1 WO2018193568 A1 WO 2018193568A1
Authority
WO
WIPO (PCT)
Prior art keywords
biomass
raw material
biomass raw
gas
fuel
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/JP2017/015801
Other languages
English (en)
Japanese (ja)
Inventor
俊一朗 上野
河西 英一
デディ プリヤント
栄 福永
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.)
IHI Corp
Original Assignee
IHI Corp
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 IHI Corp filed Critical IHI Corp
Priority to PCT/JP2017/015801 priority Critical patent/WO2018193568A1/fr
Publication of WO2018193568A1 publication Critical patent/WO2018193568A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10LFUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
    • C10L5/00Solid fuels
    • C10L5/40Solid fuels essentially based on materials of non-mineral origin
    • C10L5/44Solid fuels essentially based on materials of non-mineral origin on vegetable substances
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00Technologies for the production of fuel of non-fossil origin
    • Y02E50/10Biofuels, e.g. bio-diesel
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00Technologies for the production of fuel of non-fossil origin
    • Y02E50/30Fuel from waste, e.g. synthetic alcohol or diesel

Definitions

  • the present disclosure relates to a fuel manufacturing apparatus and a fuel manufacturing method.
  • Herbaceous biomass is, for example, empty fruit bunches (EFB: Empty ⁇ Bunch), palm coconut shell (PKS), etc., produced as a result of producing palm oil from palm coconut.
  • Woody biomass is wood, sawdust, bark, and the like.
  • microorganisms grow while the biomass is stored, for example, organic matter in the biomass is decomposed, and the biomass deteriorates (reduction of fuel components), or the biomass spontaneously ignites. The problem that occurs.
  • Patent Document 1 a technique for supplying water vapor to the biomass and sterilizing the biomass has been developed (for example, Patent Document 1).
  • Patent Document 1 requires a boiler for generating water vapor, which increases equipment costs and running costs.
  • the present disclosure is intended to provide a fuel manufacturing apparatus and a fuel manufacturing method capable of sterilizing biomass at a low cost.
  • a fuel manufacturing apparatus includes a biomass raw material, a first biomass raw material having a predetermined size or more, and a second biomass raw material having a predetermined size or less.
  • a sorting unit that sorts the second biomass material into a predetermined temperature, and a contact unit that contacts the volatile gas generated by the heating furnace with the first biomass material.
  • the contact portion further includes a combustion furnace that combusts volatile gas after contacting the first biomass material, and the heating furnace heats the second biomass material with combustion exhaust gas generated in the combustion furnace. May be.
  • a fuel production method includes a biomass raw material, a first biomass raw material having a predetermined size or more, and a second biomass raw material having a predetermined size or less. And a step of heating the second biomass raw material to a predetermined temperature to generate a volatile gas, and a step of bringing the volatile gas into contact with the first biomass raw material.
  • EFB empty fruit bunch
  • FIG. 1 is a diagram for explaining a fuel production apparatus 100.
  • solid flows such as biomass raw materials, residues, pellets, and solid fuel are indicated by solid arrows
  • gas flows such as air, combustion exhaust gas, and volatile gas are indicated by dashed arrows.
  • the fuel production apparatus 100 includes a sorting unit 110, a primary crushing unit 120, a drying unit 130, a secondary crushing unit 140, a pelletizer 150, a cooling unit 160, a combustion furnace 170, A heating furnace 180 and a contact portion 190 are included.
  • the sorting unit 110 sorts the biomass material BG0 into a first biomass material BG1 and a second biomass material BG2.
  • the first biomass raw material BG1 is EFB having a predetermined size (for example, 5 cm) or more.
  • the second biomass raw material BG2 is a foreign matter such as EFB and PKS that is less than a predetermined size.
  • the sorting unit 110 is configured by, for example, a sheave (circular forced sieve).
  • the first biomass raw material BG1 (EFB having a predetermined size or more) selected by the selection unit 110 is conveyed to the primary crushing unit 120 at the subsequent stage.
  • the second biomass raw material BG2 (the EFB and the foreign matter having a size less than a predetermined size) sorted by the sorting unit 110 is conveyed to a heating furnace 180 described later.
  • the primary crushing unit 120 crushes (primary crushing) the first biomass raw material BG1 to about 5 cm, for example.
  • the first biomass raw material BG1 crushed by the primary crushing unit 120 is conveyed to the subsequent drying unit 130.
  • the drying unit 130 is dried by high-temperature gas such as high-temperature air or combustion exhaust gas.
  • the combustion exhaust gas is a gas generated when fuel is burned in a combustion apparatus (not shown).
  • the drying unit 130 dries the first biomass raw material BG1 with a high-temperature gas until the water content becomes about 10%.
  • the first biomass raw material BG1 dried by the drying unit 130 is conveyed to the subsequent secondary crushing unit 140.
  • the gas KG after drying the first biomass raw material BG1 is supplied to a combustion furnace 170 described later.
  • the secondary crushing unit 140 crushes (secondary crushing) the dried first biomass raw material BG1 to about 1 cm, for example.
  • the first biomass raw material BG1 crushed by the secondary crushing unit 140 is conveyed to the subsequent pelletizer 150.
  • the pelletizer 150 molds the second crushed first biomass raw material BG1, and generates pellets PT (for example, a cylindrical shape).
  • the pellet PT generated by the pelletizer 150 is conveyed to the cooling unit 160 at the subsequent stage.
  • the cooling unit 160 cools the pellet PT to room temperature (for example, about 25 ° C.).
  • the pellet PT cooled by the cooling unit 160 is conveyed to a contact unit 190 described later.
  • Combustion furnace 170 burns fuel with air to generate combustion exhaust gas EX.
  • the generated combustion exhaust gas EX is sent to the heating furnace 180.
  • the heating furnace 180 heats the second biomass material BG2 to a predetermined temperature with the combustion exhaust gas EX.
  • the predetermined temperature is, for example, 150 ° C. or higher and lower than 200 ° C.
  • the volatile substance (tar etc.) contained in 2nd biomass raw material BG2 volatilizes, and the volatile gas VG is produced
  • the heating temperature of 2nd biomass raw material BG2 shall be less than 150 degreeC, heating temperature will be less than the boiling point of a volatile substance. For this reason, a volatile substance does not volatilize efficiently and the production amount of volatile gas VG will reduce.
  • the heating temperature of 2nd biomass raw material BG2 shall be 200 degreeC or more, 2nd biomass raw material BG2 will ignite. Therefore, the heating temperature of the second biomass raw material BG2 is preferably 150 ° C. or higher and lower than 200 ° C.
  • the time (heating time) for the heating furnace 180 to maintain the second biomass raw material BG2 in an environment of 150 ° C. or higher and lower than 200 ° C. is preferably 30 minutes or longer and 1 hour or shorter.
  • the heating time of the second biomass raw material BG2 becomes longer, the amount of volatile gas VG generated increases, but when it exceeds 1 hour, it is hardly generated. Therefore, the production amount of the volatile gas VG can be sufficiently ensured by setting the heating time of the second biomass raw material BG2 to 30 minutes or more.
  • the generation time of the volatile gas VG can be appropriately maintained.
  • the volatile gas VG generated in this way is sent to the subsequent contact portion 190.
  • the second biomass raw material BG2 (hereinafter referred to as “residue ZS”) from which volatile substances have been removed is transported to the combustion furnace 170 and used as fuel.
  • the contact unit 190 brings the volatile gas VG into contact with the pellet PT. Thereby, the solid fuel KN in which the volatile material in the volatile gas VG is coated on the pellet PT can be manufactured.
  • FIG. 2 is a diagram for explaining a specific configuration example of the contact portion 190.
  • the contact unit 190 includes a contact chamber 192 and a transport unit 194.
  • the flow of gas such as the volatile gas VG and the residual gas ZG is indicated by broken arrows
  • the flow of solid such as the pellet PT and solid fuel KN is indicated by solid arrows.
  • the pellet PT and the solid fuel KN are indicated by black circles.
  • a gas supply port 192a and a gas discharge port 192b are formed in the contact chamber 192.
  • the gas supply port 192a is provided below the gas discharge port 192b.
  • a gas supply pipe 192c is connected to the gas supply port 192a.
  • Volatile gas VG is supplied from the heating furnace 180 into the contact chamber 192 through the gas supply pipe 192c and the gas supply port 192a.
  • the transfer unit 194 is provided between the gas supply port 192a and the gas discharge port 192b in the contact chamber 192.
  • the transport unit 194 carries in the pellet PT. Further, the transport unit 194 carries out the solid fuel KN from the contact chamber 192.
  • the conveyance part 194 is comprised with a conveyor, for example. A plurality of holes smaller than the pellet PT (solid fuel KN) are formed in the endless belt constituting the transport unit 194. Therefore, the pellet PT comes into contact with the volatile gas VG in the transport process by the transport unit 194.
  • the contact chamber 192 is preferably maintained at 20 ° C. to 50 ° C. Thereby, the disinfection efficiency of the pellet PT by the volatile gas VG can be improved.
  • the pellet PT (solid fuel KN) sterilized by the volatile gas VG is discharged to the outside by the transport unit 194 and stored as the solid fuel KN. Further, the volatile gas VG (hereinafter referred to as “residual gas ZG”) after contacting the pellet PT in the contact chamber 192 is combusted through the gas exhaust port 192b and the gas exhaust pipe 192d connected to the gas exhaust port 192b. It is supplied to the furnace 170.
  • the conveyance speed of the conveyance unit 194 is set so that the conveyance time from when the pellet PT is carried into the contact chamber 192 to when it is carried out of the contact chamber 192 is 30 minutes or more and 1 hour 30 minutes or less. The That is, the conveyance speed is set so that the contact time between the pellet PT and the volatile gas VG is 30 minutes or more and 1 hour 30 minutes or less.
  • FIG. 3 is a flowchart showing a processing flow of the fuel production method.
  • the fuel production method of the present embodiment includes a sorting step S110, a primary crushing step S120, a drying step S130, a secondary crushing step S140, a molding step S150, a cooling step S160, and a contact step S170.
  • the sorting step S110 is a step in which the sorting unit 110 sorts the biomass raw material BG0 into a first biomass raw material BG1 having a predetermined size or larger and a second biomass raw material BG2 having a predetermined size or smaller.
  • the primary crushing step S120 is a step in which the primary crushing unit 120 primarily crushes the first biomass raw material BG1 sorted in the sorting step S110.
  • the drying step S130 is a step in which the drying unit 130 dries the first crushed first biomass raw material BG1.
  • the secondary crushing step S140 is a step in which the secondary crushing unit 140 secondary crushes the dried first biomass raw material BG1.
  • the molding step S150 is a step in which the pelletizer 150 molds the first crushed biomass material BG1 into pellets PT.
  • the cooling step S160 is a step in which the cooling unit 160 cools the molded pellet PT.
  • the contact step S170 is a step in which the contact unit 190 makes the volatile gas VG contact the pellet PT and coats the pellet PT with a volatile substance to produce the solid fuel KN. Note that the volatile gas VG is generated when the heating furnace 180 heats the second biomass material BG2 selected in the selection step S110 to a predetermined temperature.
  • the fuel manufacturing apparatus 100 and the fuel manufacturing method using the same according to the present embodiment use the volatile gas VG obtained by heating the second biomass raw material BG2 as pellets PT (first biomass raw material).
  • the pellet PT can be sterilized by a simple process such as simply contacting BG1). Therefore, the pellet PT can be sterilized at a low cost.
  • the second biomass raw material BG2 cannot be processed into pellets PT, it is sorted by the sorting unit 110. Therefore, the second biomass raw material BG2 has been conventionally discarded. Therefore, in the heating furnace 180 of the fuel production apparatus 100 of the present embodiment, the second biomass raw material BG2 that has been conventionally discarded is heated to generate the volatile gas VG. This makes it possible to generate the volatile gas VG at low cost by effectively using the second biomass raw material BG2 that has been conventionally discarded.
  • the residue ZS is conveyed to the combustion furnace 170, and the combustion furnace 170 burns the residue ZS as fuel. Thereby, the cost for the combustion furnace 170 to generate the combustion exhaust gas EX can be reduced.
  • the combustion furnace 170 can be supplied with the gas KG after drying the first biomass raw material BG1.
  • the gas KG after drying the first biomass raw material BG1 is at a higher temperature than air at normal temperature (for example, 25 ° C.). Therefore, when the combustion furnace 170 burns the fuel with the gas KG, the high-temperature combustion exhaust gas EX can be generated with a smaller amount of fuel than in the case where the combustion is performed only with air.
  • the residual gas ZG is supplied to the combustion furnace 170. Volatile substances remain in the residual gas ZG. For this reason, the volatile substance can be burned as fuel in the combustion furnace 170. Thereby, the cost for the combustion furnace 170 to generate the combustion exhaust gas EX can be reduced.
  • the residual gas ZG is higher in temperature than air at normal temperature (for example, 25 ° C.), like the gas KG. Therefore, in the combustion furnace 170, by using the residue gas ZG having a relatively high temperature, it is possible to generate the combustion exhaust gas EX having a higher temperature than in the case where the combustion is performed only with air.
  • the heating furnace 180 demonstrated and demonstrated the structure which heats 2nd biomass raw material BG2 to 150 degreeC or more and less than 200 degreeC.
  • the heating temperature is not limited.
  • the heating furnace 180 may heat the second biomass raw material BG2 to a temperature that efficiently generates the volatile gas VG.
  • the heating furnace 180 heated the 2nd biomass raw material BG2, and it demonstrated and demonstrated as an example the structure which makes 30 minutes or more and 1 hour or less.
  • the heating furnace 180 may set the time during which the volatile gas VG can be efficiently generated from the second biomass raw material BG2 as the heating time.
  • the contact part 190 contacted the pellet PT and the volatile gas VG, and demonstrated as an example the structure which makes the contact time 30 minutes or more and 1 hour 30 minutes or less.
  • the contact part 190 should just make the time which can disinfect the pellet PT efficiently as a contact time.
  • the fuel manufacturing apparatus 100 demonstrated and demonstrated the structure provided with the primary crushing part 120, the drying part 130, the secondary crushing part 140, the pelletizer 150, and the cooling part 160 as an example.
  • the primary crushing unit 120, the drying unit 130, the secondary crushing unit 140, the pelletizer 150, and the cooling unit 160 are not essential components.
  • the volatile gas VG may be directly brought into contact with the first biomass raw material BG1 selected by the selection unit 110.
  • the combustion furnace 170 demonstrated and demonstrated as an example the structure which burns residue ZS (2nd biomass raw material BG2 after being heated by the heating furnace 180). Moreover, in the said embodiment, the combustion furnace 170 demonstrated and demonstrated as an example the structure which burns residue gas ZG (volatile gas VG after contacting with pellet PT (1st biomass raw material BG1) in the contact part 190).
  • the combustion furnace 170 is not limited to fuel as long as it can generate combustion exhaust gas having a relatively high temperature.
  • the configuration in which the fuel manufacturing apparatus 100 includes the combustion furnace 170 has been described as an example.
  • the combustion furnace 170 is not an essential configuration.
  • the heating furnace 180 should just be able to heat 2nd biomass raw material BG2 to such an extent that volatile gas VG can be produced
  • the present disclosure can be used for a fuel manufacturing apparatus and a fuel manufacturing method.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)

Abstract

La présente invention concerne un dispositif de production de combustible (100) comprenant : une unité de tri (110) qui trie une matière première de biomasse BG0 en une première matière première de biomasse BG1 présentant au moins une taille prédéfinie, et une seconde matière première de biomasse BG2 dont la taille est inférieure à la taille prédéfinie ; un four de chauffage (180) qui chauffe la seconde matière première de biomasse BG2 à une température prédéfinie ; et une unité de contact (190) qui amène un gaz volatil VG produit par le four de chauffage (180) à entrer en contact avec la première matière première de biomasse (pastilles PT).
PCT/JP2017/015801 2017-04-19 2017-04-19 Dispositif de production de combustible et procédé de production de combustible Ceased WO2018193568A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2017/015801 WO2018193568A1 (fr) 2017-04-19 2017-04-19 Dispositif de production de combustible et procédé de production de combustible

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2017/015801 WO2018193568A1 (fr) 2017-04-19 2017-04-19 Dispositif de production de combustible et procédé de production de combustible

Publications (1)

Publication Number Publication Date
WO2018193568A1 true WO2018193568A1 (fr) 2018-10-25

Family

ID=63856693

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2017/015801 Ceased WO2018193568A1 (fr) 2017-04-19 2017-04-19 Dispositif de production de combustible et procédé de production de combustible

Country Status (1)

Country Link
WO (1) WO2018193568A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115451401A (zh) * 2022-10-17 2022-12-09 东方电气集团东方锅炉股份有限公司 一种分选式燃用生物质循环流化床锅炉给料系统

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003213273A (ja) * 2002-01-23 2003-07-30 National Institute Of Advanced Industrial & Technology 高発熱量炭化物の製造法
JP2008303305A (ja) * 2007-06-07 2008-12-18 Hokusei Farm:Kk 木質ペレット燃料、木質ペレット燃料の製造方法及び製造システム
JP2013203872A (ja) * 2012-03-28 2013-10-07 Jfe Engineering Corp バイオマスからの成型炭化物の製造装置及び製造方法
JP2016532544A (ja) * 2013-07-25 2016-10-20 コテュク エナジー アクチエンゲゼルシャフトKOTYK energy AG バイオマス処理装置およびバイオマス処理方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003213273A (ja) * 2002-01-23 2003-07-30 National Institute Of Advanced Industrial & Technology 高発熱量炭化物の製造法
JP2008303305A (ja) * 2007-06-07 2008-12-18 Hokusei Farm:Kk 木質ペレット燃料、木質ペレット燃料の製造方法及び製造システム
JP2013203872A (ja) * 2012-03-28 2013-10-07 Jfe Engineering Corp バイオマスからの成型炭化物の製造装置及び製造方法
JP2016532544A (ja) * 2013-07-25 2016-10-20 コテュク エナジー アクチエンゲゼルシャフトKOTYK energy AG バイオマス処理装置およびバイオマス処理方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115451401A (zh) * 2022-10-17 2022-12-09 东方电气集团东方锅炉股份有限公司 一种分选式燃用生物质循环流化床锅炉给料系统

Similar Documents

Publication Publication Date Title
JP2019045078A (ja) バイオマスの半炭化方法とその装置
KR101894817B1 (ko) 반탄화 바이오매스 제조장치
JP6966466B2 (ja) バイオマス原料分解装置、及び、バイオマスペレット燃料の製造方法
KR20000023542A (ko) 쓰레기 고형연료의 제조방법 및 제조설비
AU2018282459B2 (en) Dry-distilled coal cooling device, coal upgrading plant, and dry-distilled coal cooling method
RU2177977C2 (ru) Способ термической переработки биомассы
KR101326223B1 (ko) 팜 폐기물을 이용한 성형 탄 제조방법
JP2012177485A (ja) 石炭ボイラの稼働方法及びボイラ設備
WO2018193568A1 (fr) Dispositif de production de combustible et procédé de production de combustible
WO2020225503A1 (fr) Procede de traitement de biomasse solide par vapocraquage integrant l'energie des coproduits
JP2010077399A (ja) 炭化燃料の製造方法およびその装置
JP2019196859A (ja) 植物性バイオマス燃料の乾燥方法及びバイオマス発電施設
WO2018207229A1 (fr) Dispositif de production de combustible et procédé de production de combustible
JP6356013B2 (ja) パーム椰子種子殻の貯蔵方法
GB2339576A (en) A method for the production of charcoaland the generation of power via the pyrolysis of biomass material
CN219283341U (zh) 一种生活垃圾高温碳化装置
JP2015010137A (ja) 固体燃料の製造方法及び固体燃料
JP2010254749A (ja) バイオマス炭の製造方法およびこれに用いるバイオマス炭の製造装置
WO2018193567A1 (fr) Dispositif de production de carburant et procédé de production de carburant
KR101798332B1 (ko) 바이오촤 생산 및 열분해 가스 처리 시스템 및 처리 방법
JP5945929B2 (ja) 廃棄物ガス化溶融装置
CN112628748A (zh) 一种烘焙碳化耦合等离子体焚烧有机固废处置工艺
FR3110569A1 (fr) Procédé de production d’un engrais organique et installation correspondante
JP6672946B2 (ja) バイオマス処理装置、および、バイオマス処理方法
KR102844135B1 (ko) 악취 차단 탄화 막을 구비한 고체 연료의 제조 방법 및 제조 장치

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17906586

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 17906586

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP