WO2015186207A1 - ボイラおよびその伝熱管の取り替え方法 - Google Patents
ボイラおよびその伝熱管の取り替え方法 Download PDFInfo
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- WO2015186207A1 WO2015186207A1 PCT/JP2014/064842 JP2014064842W WO2015186207A1 WO 2015186207 A1 WO2015186207 A1 WO 2015186207A1 JP 2014064842 W JP2014064842 W JP 2014064842W WO 2015186207 A1 WO2015186207 A1 WO 2015186207A1
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- WIPO (PCT)
- Prior art keywords
- heat transfer
- transfer tube
- membrane wall
- boiler
- casing
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/10—Water tubes; Accessories therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G3/00—Steam superheaters characterised by constructional features; Details of component parts thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G7/00—Steam superheaters characterised by location, arrangement, or disposition
- F22G7/14—Steam superheaters characterised by location, arrangement, or disposition in water-tube boilers, e.g. between banks of water tubes
Definitions
- the present invention relates to a boiler and a method for replacing the heat transfer tube, and more particularly, to a boiler having a radiation chamber and a flue in which at least a part of a wall surface is formed of a membrane wall, and a method for replacing the heat transfer tube.
- a flow path for high-temperature gas generated in a combustion chamber is formed by a membrane wall to form a radiation chamber and a flue, and a superheater is installed in the radiation chamber and / or the flue.
- a boiler that generates superheated steam by heating the steam flowing inside with a high-temperature gas is known (Patent Document 1).
- the generated superheated steam can be used for power generation, for example, as a driving force of a turbine.
- FIG. 9 shows an outline of the overall configuration of a conventional boiler 80, and hot gas from the combustion chamber 81 flows into the second radiation chamber 83 through the first radiation chamber 82 and further into the third flue 84. Inflow.
- a plurality of superheaters 86 are installed in the third flue 84 formed by the membrane wall 85.
- the heat transfer tube 87 of the superheater 86 includes a heat transfer tube main body portion 87 ⁇ / b> A disposed inside the third flue 84, an inlet tube portion 87 ⁇ / b> B and an outlet that are spaced apart in the vertical direction. It has a tube portion 87C and has a panel-like shape as a whole (hereinafter referred to as “heat transfer tube panel”). As shown in FIG. 10A, the superheater 86 is configured by arranging a large number of heat transfer tube panels 88 in the horizontal direction.
- the inlet tube portion 87B and the outlet tube portion 87C of the heat transfer tube 87 constituting the heat transfer tube panel 88 pass through the membrane wall 85, and the third flue It is connected to the header 89 outside 84.
- the portion of the heat transfer tube 87 where the inlet tube portion 87B and the outlet tube portion 87C penetrate the membrane wall 85 is kept airtight by the wall box 90 and the refractory material therein.
- the heat transfer tube 87 may be thinned by contacting the heat transfer tube 87 of the superheater 86. For this reason, before the thickness reduction of the heat transfer tube 87 due to corrosion exceeds the allowable limit, the corroded heat transfer tube 87 is taken out from the third flue 84 and replaced with a new heat transfer tube.
- the inlet tube portion 87 ⁇ / b> B and the outlet tube portion 87 ⁇ / b> C of the heat transfer tube 87 that penetrates the membrane wall 85 are connected to the membrane wall 85 and the header 89. Cut at a point 91. Further, the wall box 90 and the refractory material inside thereof are removed.
- a slit-like opening 92 for individually taking out the heat transfer tube panel 88 is formed in the membrane wall 85 opposite to the membrane wall 85 through which the inlet tube portion 87B and the outlet tube portion 87C of the heat transfer tube 87 pass.
- FIG. 11 shows a membrane wall 85 in which slit-like openings 92 are formed. In order to form one slit-like opening 92, a plurality of water tubes 85A of the membrane wall 85 and a wall material 85B between them are cut off. Is done.
- the heat transfer tube panel 88 separated from the header 89 is moved to the left side in the drawings in FIGS. 10A and 10B, and the inlet tube portion 87B and the outlet tube portion 87C that have penetrated the right membrane wall 85 in the drawing. Is drawn from the membrane wall 85 to the third flue 84 side.
- the heat transfer tube panel 88 into which the inlet tube portion 87B and the outlet tube portion 87C are drawn is moved upward or downward in FIG. 10A by the worker in the third flue 84, and the membrane wall 85 Are transferred to the position of the nearest slit-shaped opening 92 formed.
- the heat transfer tube panel 88 is moved to the left in FIG. 10A, and the heat transfer tube panel 88 is moved through the slit-shaped opening 92 of the membrane wall 85 as shown in FIG. Take out from the third flue 84 to the second radiation chamber 83 side.
- the inlet pipe part 87B and the outlet pipe part 87C of the new heat transfer pipe panel 88 are connected to the inlet pipe part 87B and the outlet pipe part 87C left in the header 89 by welding.
- a new wall box 90 and a refractory material inside thereof are installed at a location where the inlet pipe portion 87B and the outlet pipe portion 87C of the new heat transfer tube panel 88 penetrate the membrane wall 85.
- the slit-shaped opening 92 formed in the membrane wall 85 for carrying out and carrying in the heat transfer tube panel 88 is hermetically sealed by welding a newly produced membrane wall piece.
- the welding work of the inlet pipe portion and the outlet pipe portion of the heat transfer pipe in a limited and narrow space and in many places has led to a prolonged construction period.
- the sealing work of the slit-like opening of the membrane wall requires the production of a new membrane wall piece and the welding work thereof, which is a heavy burden of work and prolongs the construction period. .
- the present invention has been made in view of the above-described problems of the prior art, and can reduce the load of replacing a corroded heat transfer tube and shorten the operation time of the boiler and its heat transfer tube. It is intended to provide a replacement method.
- the present invention includes a boiler having a casing in which at least a part of a wall surface is formed of a membrane wall, a heat transfer tube panel disposed inside the casing, and the heat transfer tube.
- a collecting pipe connected to a heat pipe panel and disposed outside the casing, and a membrane wall opening formed in the membrane wall so that the heat transfer pipe panel can be taken in and out of the casing. It is characterized by that.
- the present invention according to a second aspect is characterized in that, in the present invention according to the first aspect, further comprising a sealing member detachably attached to the membrane wall for sealing the membrane wall opening. To do.
- the present invention according to a third aspect is the present invention according to the first or second aspect, wherein the plurality of heat transfer tube panels connected to the collecting pipe and the plurality of heat transfer tube panels are respectively formed. And a plurality of the membrane wall openings.
- the present invention according to a fourth aspect is the present invention according to the third aspect, comprising a sealing member that is detachably attached to the membrane wall in order to seal the membrane wall opening,
- the plurality of membrane wall openings are formed as an integral member for sealing the whole.
- the present invention according to the fifth aspect is characterized in that, in the present invention according to the second or fourth aspect, the sealing member is fixed to the membrane wall by a detachable fastener.
- the present invention according to a sixth aspect is the heat transfer tube module according to any one of the first to fifth aspects, comprising a plurality of the heat transfer tube panels and the collecting tube to which the plurality of heat transfer tube panels are connected. It is characterized by having multiple.
- the present invention according to a seventh aspect is characterized in that, in the present invention according to the sixth aspect, each of the plurality of collecting pipes is connected to a common pipe via each connecting pipe.
- the present invention according to an eighth aspect is characterized in that, in the present invention according to the seventh aspect, the common pipe is arranged at a position where a space for drawing out the heat transfer tube panel can be secured.
- the present invention according to a ninth aspect is a method for replacing a heat transfer tube in a boiler according to any one of the first to eighth aspects, wherein the collecting pipe to which the heat transfer tube panel is connected, and A step of releasing the fixed state of the heat transfer tube panel with respect to the membrane wall, and a step of moving the heat transfer tube panel in the casing together with the collecting pipe and pulling it out of the casing. .
- the tenth aspect of the present invention is a method for replacing a heat transfer tube in the boiler of the present invention according to the sixth aspect, the step of separating the collecting tube to which the heat transfer tube panel is connected, and the heat transfer tube to the membrane wall.
- the present invention is a method for replacing a heat transfer tube of a boiler according to the eighth aspect of the present invention, comprising the step of disconnecting a collecting tube to which the heat transfer tube panel is connected, and the heat transfer tube to the membrane wall. A step of releasing the fixed state of the panel, and a step of moving the heat transfer tube panel in the casing together with the collecting tube and pulling it out of the casing, the heat transfer tube passing between a pair of the common pipes The panel is pulled out.
- FIG. 5 is a view taken along arrow V-V in FIG. 3.
- FIG. 5 The perspective view for demonstrating the replacement method of the heat exchanger tube in the boiler shown in FIG.
- FIG. 9 The side view for demonstrating the replacement method of the heat exchanger tube in the boiler shown in FIG.
- (a) is a horizontal sectional view
- (b) is the side surface of (a).
- (C) is the side view which showed the removed heat exchanger tube.
- the hot gas from the combustion chamber 11 flows into the second radiation chamber 13 through the first radiation chamber 12, and further, the third flue (casing) 14. It is comprised so that it may flow into.
- the 1st superheater 16, the 2nd superheater 17, and the 3rd superheater 18 are installed toward the downward direction from the upper direction.
- Hot gas flows through the third flue 14 from below to above.
- the steam heated by the high-temperature gas flows from the first superheater 16 to the second superheater 17 and from the second superheater 17 to the third superheater 18 from top to bottom.
- the superheated steam generated by the first to third superheaters 16, 17, 18 can be used, for example, as a driving force of a turbine to generate electric power.
- first to third superheaters 16, 17, 18, particularly the third superheater 18 and the second superheater 17 have severe temperature conditions, and the progress of thinning due to corrosion is fast. It is necessary to perform replacement work relatively frequently.
- a header (collecting pipe) 19 connected to the third superheater 18 is divided into first to sixth headers 19.
- Six (or five) heat transfer tube panels 20 are connected to each of the sixth headers 19.
- the heat transfer tube 21 of the heat transfer tube panel 20 includes a heat transfer tube main body portion 21 ⁇ / b> A disposed inside the third flue 14, and an inlet extending through the membrane wall 15.
- a pipe part 21B and an outlet pipe part 21C are provided.
- the inlet tube portion 21 ⁇ / b> B and the outlet tube portion 21 ⁇ / b> C of the heat transfer tube 21 of the heat transfer tube panel 20 penetrate the membrane wall 15 between adjacent water tubes 15 ⁇ / b> A of the membrane wall 15. Yes.
- the membrane wall 15 has a penetration portion of each inlet pipe portion 21 ⁇ / b> B and a penetration portion of each outlet pipe portion 21 ⁇ / b> C.
- Each membrane wall opening 22 formed continuously in the extending direction of the water pipe 15A is formed.
- the membrane wall opening 22 formed in the membrane wall 15 has first to sixth sealing flanges (sealing) provided corresponding to the first to sixth headers 19, respectively.
- Sealing member 23 The inlet tube portion 21 ⁇ / b> B and the outlet tube portion 21 ⁇ / b> C of the heat transfer tube 21 pass through the sealing flange 23, and the sealing member 24 ensures airtightness of those through portions.
- the sealing flange 23 is fixed to the membrane wall 15 by bolts (fasteners) 25, and the sealing flange 23 can be attached to and detached from the membrane wall 15 by detaching the bolts 25.
- the sealing flange portion also serves as a wall box in the conventional boiler.
- each of the first to sixth headers 19, the six heat transfer tube panels 20 connected to each header 19, and each sealing flange 23 constitute each heat transfer tube module 26.
- the boiler 10 according to this embodiment includes a total of six heat transfer tube modules 26.
- the inlet pipe portion 21A and the outlet pipe portion 21B of the heat transfer pipe 21 extending outward from the membrane wall 15 are connected to the header 19, and the first to sixth headers 19 are respectively connected to the connecting pipes.
- 27 is connected to the upper and lower common pipes 28.
- the upper and lower common pipes 28 are arranged at positions where a space for drawing out the heat transfer tube panel 20 can be secured.
- the connecting tube 27 of the header 19 belonging to the heat transfer tube module 26 including the corroded heat transfer tube 21 is cut at the cutting position 29 shown in FIG. 3 (header 19 separation step).
- the bolt 25 that fixes the sealing flange 23 to the membrane wall 15 is removed, and the fixing state of the sealing flange 23 to the membrane wall 15 is released (step of releasing the sealing flange 23).
- the entire heat transfer tube module 26 is moved as shown in FIGS. 7 and 8, and the heat transfer tube 21 in the third flue 14 is drawn out to the outside through the membrane wall opening 22 (heat transfer tube 21 Drawing process).
- the common pipe 28 is shifted in advance up and down, so that the heat transfer tube module 26 can be drawn out between the upper and lower common pipes 28 as shown in FIG. .
- each heat transfer tube panel 20 of the new heat transfer tube module 26 is attached to the membrane wall 15 contrary to the above-described removal process. It inserts in the inside of the 3rd flue 14 through each membrane wall opening part 22 formed between adjacent water pipes 15A.
- the sealing flange 23 of the new heat transfer tube module 26 is fixed to the membrane wall 15 with bolts 25. Further, the connecting pipe 27 of the header 19 of the new heat transfer pipe module 26 is connected to the connecting pipe 27 left on the common pipe 28 side by welding when the corroded heat transfer pipe module 26 is removed.
- the connecting tube connecting the header 19 and the common pipe 28. 27, and only the bolt 25 of the sealing flange 23 is removed.
- the connecting tube 27 is welded and the sealing flange 23 is fixed with the bolt 25.
- the removed heat transfer tube module 26 is transported from the site to an inspection / repair factory, and if it is determined that it can be reused as a result of the inspection, the corroded portion is repaired and reused when the heat transfer tube is replaced next time. be able to.
- the work period can be further shortened. Can be planned.
- the header 19 is divided into six to constitute the six heat transfer tube modules 26 as described above.
- division of the header is not necessarily essential.
- the entire header may be removed together with all the heat transfer tube panels connected thereto without dividing the header.
- the plurality of membrane wall openings 22 are sealed with a single sealing flange 23.
- each of the plurality of membrane wall openings 22 is sealed with each sealing flange. It can also be individually sealed.
- the boiler provided with the boiler wall which has a membrane wall may be an application object.
- a boiler using exhaust gas without having a combustion furnace may be used.
Abstract
Description
11 燃焼室
12 第1放射室
13 第2放射室
14 第3煙道(ケーシング)
15 メンブレンウォール
15A メンブレンウォールの水管
16 第1過熱器
17 第2過熱器
18 第3過熱器
19 ヘッダ(集合管)
20 伝熱管パネル
21 過熱器の伝熱管
21A 伝熱管本体部
21B 伝熱管の入口管部
21C 伝熱管の出口管部
22 メンブレンウォール開口部
23 封止フランジ(封止部材)
24 シール部材
25 ボルト(締結具)
26 伝熱管モジュール
27 連絡管
28 共通配管
29 切断位置
Claims (11)
- 少なくとも壁面の一部がメンブレンウォールで形成されたケーシングを有するボイラにおいて、
前記ケーシングの内部に配置された伝熱管パネルと、
前記伝熱管パネルと接続され、前記ケーシングの外部に配置された集合管と、
前記メンブレンウォールにおいて、前記伝熱管パネルが前記ケーシングの内外に出し入れ可能なように形成されたメンブレンウォール開口部と、を備えたボイラ。 - 前記メンブレンウォール開口部を封止するために前記メンブレンウォールに着脱自在に装着される封止部材をさらに備えた請求項1記載のボイラ。
- 前記集合管に接続された複数の前記伝熱管パネルと、
前記複数の伝熱管パネルのそれぞれに対応して形成された複数の前記メンブレンウォール開口部と、を備えた請求項1または2に記載のボイラ。 - 前記メンブレンウォール開口部を封止するために前記メンブレンウォールに着脱自在に装着される封止部材を備え
前記封止部材は、前記複数のメンブレンウォール開口部の全体を封止する一体の部材として形成されている、請求項3記載のボイラ。 - 前記封止部材は、前記メンブレンウォールに対して、着脱自在の締結具によって固定されている、請求項2または4に記載のボイラ。
- 複数の前記伝熱管パネルと前記複数の伝熱管パネルが接続された前記集合管とを有する伝熱管モジュールを複数備えている、請求項1乃至5のいずれか一項に記載のボイラ。
- 複数の前記集合管のそれぞれが各連絡管を介して共通配管に接続されている、請求項6記載のボイラ。
- 前記共通配管は、前記伝熱管パネルを引き出すための空間を確保できるような位置に配置されている、請求項7記載のボイラ。
- 請求項1乃至8のいずれか一項に記載のボイラにおける伝熱管の取り替え方法であって、
前記伝熱管パネルが接続された集合管を切り離す工程と、
前記メンブレンウォールに対する前記伝熱管パネルの固定状態を解除する工程と、
前記ケーシング内の前記伝熱管パネルを、前記集合管と共に移動させて前記ケーシングの外部に引き出す工程と、を備えた伝熱管の取り替え方法。 - 請求項6記載のボイラにおける伝熱管の取り替え方法であって、
前記伝熱管パネルが接続された集合管を切り離す工程と、
前記メンブレンウォールに対する前記伝熱管パネルの固定状態を解除する工程と、
前記ケーシング内の前記伝熱管パネルを、前記集合管と共に移動させて前記ケーシングの外部に引き出す工程と、を備え、
前記伝熱管モジュール毎に前記伝熱管パネルを前記ケーシングの外部に引き出す、伝熱管の取り替え方法。 - 請求項8記載のボイラの伝熱管の取り替え方法であって、
前記伝熱管パネルが接続された集合管を切り離す工程と、
前記メンブレンウォールに対する前記伝熱管パネルの固定状態を解除する工程と、
前記ケーシング内の前記伝熱管パネルを、前記集合管と共に移動させて前記ケーシングの外部に引き出す工程と、を備え、
一対の前記共通配管の間を通して前記伝熱管パネルを引き出す、伝熱管の取り替え方法。
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016524983A JP6453323B2 (ja) | 2014-06-04 | 2014-06-04 | ボイラおよびその伝熱管の取り替え方法 |
MYPI2016002107A MY182574A (en) | 2014-06-04 | 2014-06-04 | Boiler and method of replacing heat transfer pipe thereof |
KR1020177000051A KR101993064B1 (ko) | 2014-06-04 | 2014-06-04 | 보일러 및 그 전열관의 교체 방법 |
PCT/JP2014/064842 WO2015186207A1 (ja) | 2014-06-04 | 2014-06-04 | ボイラおよびその伝熱管の取り替え方法 |
CN201420573953.2U CN204593340U (zh) | 2014-06-04 | 2014-09-30 | 锅炉 |
CN201410520253.1A CN105222118B (zh) | 2014-06-04 | 2014-09-30 | 锅炉及锅炉传热管的更换方法 |
Applications Claiming Priority (1)
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PCT/JP2014/064842 WO2015186207A1 (ja) | 2014-06-04 | 2014-06-04 | ボイラおよびその伝熱管の取り替え方法 |
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WO2015186207A1 true WO2015186207A1 (ja) | 2015-12-10 |
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PCT/JP2014/064842 WO2015186207A1 (ja) | 2014-06-04 | 2014-06-04 | ボイラおよびその伝熱管の取り替え方法 |
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JP (1) | JP6453323B2 (ja) |
KR (1) | KR101993064B1 (ja) |
CN (2) | CN105222118B (ja) |
MY (1) | MY182574A (ja) |
WO (1) | WO2015186207A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP7221436B1 (ja) | 2022-06-28 | 2023-02-13 | 三菱重工パワー環境ソリューション株式会社 | バンドルおよび熱交換器並びに排煙処理装置、バンドルの交換方法、バンドルの水張方法 |
JP7325955B2 (ja) | 2018-12-25 | 2023-08-15 | 川崎重工業株式会社 | 伝熱管パネルの製造方法及び伝熱管パネル組立装置 |
Families Citing this family (3)
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WO2015186207A1 (ja) * | 2014-06-04 | 2015-12-10 | 川崎重工業株式会社 | ボイラおよびその伝熱管の取り替え方法 |
CN105737136B (zh) * | 2016-04-26 | 2018-08-14 | 浙江伟明环保股份有限公司 | 一种u形管过热器 |
CN108870365A (zh) * | 2017-05-15 | 2018-11-23 | 通用电气公司 | 锅炉及其改进方法 |
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2014
- 2014-06-04 WO PCT/JP2014/064842 patent/WO2015186207A1/ja active Application Filing
- 2014-06-04 MY MYPI2016002107A patent/MY182574A/en unknown
- 2014-06-04 JP JP2016524983A patent/JP6453323B2/ja active Active
- 2014-06-04 KR KR1020177000051A patent/KR101993064B1/ko active IP Right Grant
- 2014-09-30 CN CN201410520253.1A patent/CN105222118B/zh active Active
- 2014-09-30 CN CN201420573953.2U patent/CN204593340U/zh active Active
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JP7325955B2 (ja) | 2018-12-25 | 2023-08-15 | 川崎重工業株式会社 | 伝熱管パネルの製造方法及び伝熱管パネル組立装置 |
JP7221436B1 (ja) | 2022-06-28 | 2023-02-13 | 三菱重工パワー環境ソリューション株式会社 | バンドルおよび熱交換器並びに排煙処理装置、バンドルの交換方法、バンドルの水張方法 |
JP2024004382A (ja) * | 2022-06-28 | 2024-01-16 | 三菱重工パワー環境ソリューション株式会社 | バンドルおよび熱交換器並びに排煙処理装置、バンドルの交換方法、バンドルの水張方法 |
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CN204593340U (zh) | 2015-08-26 |
JP6453323B2 (ja) | 2019-01-16 |
CN105222118A (zh) | 2016-01-06 |
KR20170013976A (ko) | 2017-02-07 |
CN105222118B (zh) | 2018-10-16 |
MY182574A (en) | 2021-01-25 |
JPWO2015186207A1 (ja) | 2017-04-20 |
KR101993064B1 (ko) | 2019-06-25 |
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