WO2017056472A1 - Scraper device for crystallization tank - Google Patents
Scraper device for crystallization tank Download PDFInfo
- Publication number
- WO2017056472A1 WO2017056472A1 PCT/JP2016/004337 JP2016004337W WO2017056472A1 WO 2017056472 A1 WO2017056472 A1 WO 2017056472A1 JP 2016004337 W JP2016004337 W JP 2016004337W WO 2017056472 A1 WO2017056472 A1 WO 2017056472A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- scraper
- crystallization tank
- convex
- scraper device
- crystallization
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D9/00—Crystallisation
- B01D9/02—Crystallisation from solutions
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D21/00—Processes for servicing or operating cells for electrolytic coating
- C25D21/16—Regeneration of process solutions
- C25D21/18—Regeneration of process solutions of electrolytes
Definitions
- the present invention relates to a scraper device that scrapes off a crystallized substance (crystal) adhering to the inner surface of a crystallization tank in a crystallization tank used for regenerating a used plating solution.
- Iron, water, and sludge are mixed in the plating solution (for example, methanesulfonic acid solution) used when tin is plated on the steel sheet.
- a plating solution regeneration facility (for example, a methanesulfonic acid regeneration facility) is used to regenerate the plating solution by removing these mixtures (iron, moisture, sludge).
- a used plating solution is concentrated to a predetermined concentration (for example, four times the concentration) with a concentrator, and then the concentrated plating solution is formed into a cylindrical shape called a crystallization tank (crystal can).
- the solution is sent to the tank, and the plating solution is cooled to a predetermined temperature (for example, ⁇ 4 ° C.) in the crystallization tank, so that the iron content dissolved in the plating solution is crystallized.
- the iron crystals crystallized in the plating solution are separated from the plating solution by a solid-liquid separator.
- a cooling device is installed on the outer surface of the crystallization tank to cool the solution in the crystallization tank to a predetermined temperature.
- a part of the crystal (crystallized product) crystallized from this solution adheres to the inner surface of the crystallization tank, the heat transfer efficiency from the cooling device decreases, and the solution in the crystallization tank is cooled to a predetermined temperature. There is a possibility that it cannot be held.
- the liquid feeding to the crystallization tank is stopped and the operation of the apparatus after the crystallization tank is stopped from the viewpoint of equipment maintenance and quality assurance.
- a scraper is installed at the tip of a stirrer for stirring the solution in the crystallization tank in order to scrape off the crystals adhering to the inner surface of the crystallization tank (for example, patents).
- a scraper is provided at the tip in the radial direction of the stirrer that stirs the solution in the crystallization tank. is set up.
- the scraper contacts the inner surface of the crystallization tank uniformly.
- the inner surface of the crystallization tank is not a perfect circle due to aging of the crystallization tank (deformation due to the weight of the pipes attached to the tank), etc.
- the scraper cannot contact the inner surface of the crystallization tank uniformly around the entire surface, and when the scraper passes through the convex part, it cannot be recovered by being greatly warped and deformed. It cannot be scraped off, and scraping of the attached crystals occurs.
- An object of the present invention is to provide a scraper device for a crystallization tank that can be scraped off.
- the present invention has the following features.
- a scraper device installed at the tip of the stirrer in the radial direction of a stirrer for stirring the solution in the crystallization tank in order to scrape off the crystallized matter adhering to the inner surface of the cylindrical crystallization tank, It has a convex scraper for scraping off the crystallized material adhering to the convex part on the inner surface of the tank, and a concave scraper for scraping off the crystallized material adhering to the concave part on the inner surface of the crystallizing tank.
- a scraper device for a crystallization tank installed at the tip of the stirrer in the radial direction of a stirrer for stirring the solution in the crystallization tank in order to scrape off the crystallized matter adhering to the inner surface of the cylindrical crystallization tank, It has a convex scraper for scraping off the crystallized material adhering to the convex part on the inner surface of the tank, and a concave scraper for scraping off the crystallized
- the convex scraper is configured such that the clearance from the inner surface of the crystallization tank at a position where the distance from the central axis of the crystallization tank is the shortest in the convex part is 0 mm to 1.5 mm.
- the recess scraper is configured such that the clearance from the inner surface of the crystallization tank at the position where the distance from the central axis of the crystallization tank is the longest in the recess is 0 mm to 1.5 mm.
- the scraper device for a crystallization tank according to any one of [1] to [4].
- the crystallized substance (crystal) adhering to the inner surface of the crystallization tank can be scraped off accurately.
- FIG. 1 is a longitudinal sectional view showing a crystallization tank in one embodiment of the present invention
- FIG. 2 is a transverse sectional view showing a crystallization tank in one embodiment of the present invention.
- the crystallization tank 1 in one embodiment of the present invention has a cylindrical shape, an outer cylinder 2, an inner cylinder 3 provided inside the outer cylinder 2, and an outer cylinder 2. And a ceiling 5 a that covers the upper part of the inner cylinder 3, and an outer cylinder 2 and a floor 5 b that is located at the lower part of the inner cylinder 3.
- the crystallization tank 1 is made of, for example, SUS304 and has a thickness of 2 to 6 mm.
- the cooling liquid 4 is supplied to the gap between the outer cylinder 2 and the inner cylinder 3 in order to cool the regenerating target plating liquid 30 supplied into the inner cylinder 3.
- a stirrer 6 is installed in order to stir the regeneration target plating solution 30 supplied into the inner cylinder 3.
- the stirrer 6 includes a motor 7 installed in the upper part of the ceiling, a rotary shaft 8 extending downward from the motor 7 in the inner cylinder 3, and a stirring blade 9 extending from the rotary shaft 8 in the tank radial direction.
- the stirring blade 9 rotates around the rotation shaft 8.
- the plating solution 30 to be regenerated supplied into the inner cylinder 3 is cooled to a predetermined temperature by the cooling liquid 4 through the inner cylinder 3 while being stirred by the stirrer 6.
- the iron dissolved in the plating solution 30 is crystallized in the plating solution 30 as a crystallized product 31.
- convex portions 3 ⁇ / b> A and concave portions 3 ⁇ / b> B are generated on the inner surface of the crystallization tank 1 (the inner surface 3 a of the inner cylinder 3) due to aging and the like.
- the convex portion 3A is a portion having a relatively short distance from the central axis of the crystallization tank 1 (axial center 8a of the rotating shaft 8) to the inner surface of the crystallization tank 1 (inner surface 3a of the inner cylinder 3).
- the recess 3B is a portion where the distance from the central axis of the crystallization tank 1 (axial center 8a of the rotating shaft 8) to the inner surface of the crystallization tank 1 (inner surface 3a of the inner cylinder 3) is relatively long.
- the average value of the distance from the axis 8a of the rotating shaft 8 to the inner surface 3a of the inner cylinder 3 is used as a reference value, and the distance from the axis 8a of the rotating shaft 8 to the inner surface 3a of the inner cylinder 3 is less than the reference value.
- Is a convex portion 3A, and a portion where the distance from the axis 8a of the rotating shaft 8 to the inner surface 3a of the inner cylinder 3 is a reference value or more is a concave portion 3B.
- a convex part for scraping off the crystallized substance 32 attached to the convex part 3A in order to scrape off the crystallized substance 32 (not shown in FIG. 1) attached to the inner surface 3a of the inner cylinder 3, a convex part for scraping off the crystallized substance 32 attached to the convex part 3A.
- a scraper device 10 including a scraper 12 for a recess and a scraper 14 for a recess for scraping off a crystallized product 32 adhering to the recess 3B is installed at the tip of the stirrer 6 in the radial direction of the tank.
- the scraper device 10 is installed from the vicinity of the ceiling 5a of the crystallization tank 1 to the vicinity of the floor 5b.
- the scraper mounting plate 11 disposed at the tip of the stirring blade 9 of the stirrer 6 in the tank radial direction and the stirrer 6 From the front to the rear in the rotational direction S, the convex scraper, the convex scraper support plate, the concave scraper, and the concave scraper support plate were stacked in this order and attached to the scraper mounting plate 11 with bolts and nuts 16.
- a convex scraper 12, a convex scraper support plate 13, a concave scraper 14, and a concave scraper support plate 15 are provided.
- FIG. 3 is a plan view showing the planar shapes of the convex scraper 12, the convex scraper support plate 13, the concave scraper 14, and the concave scraper support plate 15. As shown in FIG. In both cases, the planar shape is rectangular and the length in the vertical direction is the same, but the length in the tip direction is different. And the attachment hole 17 for volt
- the convex scraper 12 is a scraper for scraping off the crystallized product 32 adhering to the convex part 3A.
- it is made of hard Teflon (registered trademark) and has a thickness of 0.5 to 3 mm.
- the convex portion scraper support plate 13 is configured so that the convex portion scraper 12 can be restored even when warped and deformed by the resistance force from the crystallized matter 32 when the crystallized matter 32 attached to the convex portion 3A is scraped off.
- It is a support board.
- it is made of hard Teflon (registered trademark) and has a thickness of 1 to 6 mm.
- the concave portion scraper 14 is a scraper for scraping off the crystallized product 32 adhering to the concave portion 3B.
- it is made of hard Teflon (registered trademark) and has a thickness of 1 to 4 mm.
- the concave portion scraper support plate 15 is a support plate for allowing the concave portion scraper 14 to be restored after being greatly warped and deformed when passing through the convex portion 3A.
- it is made of stainless spring steel and has a thickness of 0.2 to 0.6 mm.
- the clearance between the convex scraper 12 and the inner surface 3 a of the inner cylinder 3 based on the viewpoint of maintaining the heat transfer efficiency from the coolant 4 and the viewpoint of suppressing wear of the scraper device 10 and preventing overload of the stirrer 6.
- the clearance is set to 0 mm to 1.5 mm at the position where the distance from the axis 8a of the rotary shaft 8 to the inner surface 3a of the inner cylinder 3 is the shortest in the projection 3A.
- the clearance with the inner surface 3a of the cylinder 3 is such that the clearance is 0 mm to 1.5 mm at the position where the distance from the axis 8a of the rotary shaft 8 to the inner surface 3a of the inner cylinder 3 is the longest in the recess 3B. It is preferable to do this.
- the inner surface of the crystallization tank 1 (the inner surface of the crystallization tank 1 (inner cylinder) even when the convex part 3A and the concave part 3B are formed on the inner surface 3a of the inner cylinder 3).
- the crystallized material (crystal) adhering to the inner surface 3a) of 3 can be scraped off accurately.
- the scraper In the type of scraper that is pressed against the inner surface of the crystallization tank 1, it is difficult to cause the scraper to follow the unevenness of the inner cylinder 3. On the other hand, in the present invention, the scraper can easily follow the unevenness of the inner cylinder 3 by adjusting the clearance with the inner surface 3a of the inner cylinder 3 according to the unevenness.
- the convex scraper 12 is installed in front of the rotation direction S of the stirrer 6 and the concave scraper 14 is installed behind the rotation direction S of the stirrer 6. It may be reversed.
- a crystallization tank in a plating solution regeneration facility (for example, a methanesulfonic acid regeneration facility) is considered, but the present invention can also be applied to a crystallization tank for other uses. .
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Crystallography & Structural Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
- Accessories For Mixers (AREA)
- Cleaning In General (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
2 外筒
3 内筒
3a 内筒の内面
3A 凸部
3B 凹部
4 冷却液
5a 天井
5b 床
6 攪拌機
7 モータ
8 回転軸
8a 回転軸の軸心
9 攪拌翼
10 スクレーパー装置
11 スクレーパー取り付け板
12 凸部用スクレーパー
13 凸部用スクレーパーサポート板
14 凹部用スクレーパー
15 凹部用スクレーパーサポート板
16 ボルト・ナット
17 ボルト・ナット用取り付け穴(長穴)
30 めっき液
31 めっき液中の晶析物
32 晶析槽内面に付着した晶析物
DESCRIPTION OF
30
Claims (6)
- 円筒形状の晶析槽の内面に付着した晶析物を掻き落すために、晶析槽内の溶液を攪拌する攪拌機の槽半径方向先端に設置されたスクレーパー装置であって、晶析槽の内面の凸部に付着した晶析物を掻き落すための凸部用スクレーパーと、晶析槽の内面の凹部に付着した晶析物を掻き落すための凹部用スクレーパーとを備えていることを特徴とする晶析槽のスクレーパー装置。 A scraper device installed at the tip of a stirrer in the radial direction of a stirrer that stirs the solution in the crystallization tank in order to scrape off the crystallized material adhering to the inner surface of the cylindrical crystallization tank. Characterized by comprising a convex scraper for scraping off the crystallized substance adhering to the convex part of the pit and a concave scraper for scraping off the crystallized substance adhering to the concave part on the inner surface of the crystallization tank. Scraper device for crystallization tank.
- 前記凹部用スクレーパーが反り変形した後に復元できるようにするための凹部用スクレーパーサポート部材が取り付けられていることを特徴とする請求項1に記載の晶析槽のスクレーパー装置。 2. A scraper device for a crystallization tank according to claim 1, further comprising a recess scraper support member attached so that the recess scraper can be restored after being warped and deformed.
- 前記凸部用スクレーパーが反り変形した後に復元できるようにするための凸部用スクレーパーサポート部材が取り付けられていることを特徴とする請求項1または2に記載の晶析槽のスクレーパー装置。 3. A scraper device for a crystallization tank according to claim 1, wherein a convex scraper support member is attached so that the convex scraper can be restored after being warped and deformed.
- 前記凸部用スクレーパー、前記凸部用スクレーパーサポート部材、前記凹部用スクレーパー、前記凹部用スクレーパーサポート部材、の4部材が重ね合わされてボルト・ナットで攪拌翼に固定されていることを特徴とする請求項1~3に記載の晶析槽のスクレーパー装置。 4. The four parts of the convex part scraper, the convex part scraper support member, the concave part scraper, and the concave part scraper support member are overlapped and fixed to the stirring blade with bolts and nuts. Item 4. A scraper device for a crystallization tank according to Item 1 to 3.
- 前記凸部用スクレーパーは、前記凸部の中で晶析槽の中心軸からの距離が最も短い位置における晶析槽の内面とのクリアランスが0mm~1.5mmとなるように構成され、前記凹部用スクレーパーは、前記凹部の中で晶析槽の中心軸からの距離が最も長い位置における晶析槽の内面とのクリアランスが0mm~1.5mmとなるように構成されていることを特徴とする請求項1~4のいずれかに記載の晶析槽のスクレーパー装置。 The convex scraper is configured such that a clearance between the convex portion and the inner surface of the crystallization tank at a position where the distance from the central axis of the crystallization tank is the shortest is 0 mm to 1.5 mm. The scraper is configured such that the clearance with the inner surface of the crystallization tank at the position where the distance from the central axis of the crystallization tank is the longest in the recess is 0 mm to 1.5 mm. 5. A scraper device for a crystallization tank according to any one of claims 1 to 4.
- 晶析槽内の溶液は、鋼板に錫をめっきする際に使用したメタンスルホン酸溶液であることを特徴とする請求項1~5のいずれかに記載の晶析槽のスクレーパー装置。 The scraper device for a crystallization tank according to any one of claims 1 to 5, wherein the solution in the crystallization tank is a methanesulfonic acid solution used when tin is plated on a steel sheet.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016570136A JP6237935B2 (en) | 2015-09-30 | 2016-09-26 | Crystallizer Scraper Equipment |
CN201680055889.0A CN108025222B (en) | 2015-09-30 | 2016-09-26 | Scraper device of crystallization tank |
KR1020187008467A KR102041940B1 (en) | 2015-09-30 | 2016-09-26 | Scraper device for crystallization tank |
MYPI2018700073A MY197377A (en) | 2015-09-30 | 2016-09-26 | Scraper device for crystallization tank |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2015192441 | 2015-09-30 | ||
JP2015-192441 | 2015-09-30 |
Publications (1)
Publication Number | Publication Date |
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WO2017056472A1 true WO2017056472A1 (en) | 2017-04-06 |
Family
ID=58423262
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2016/004337 WO2017056472A1 (en) | 2015-09-30 | 2016-09-26 | Scraper device for crystallization tank |
Country Status (6)
Country | Link |
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JP (1) | JP6237935B2 (en) |
KR (1) | KR102041940B1 (en) |
CN (1) | CN108025222B (en) |
MY (1) | MY197377A (en) |
TW (1) | TWI701073B (en) |
WO (1) | WO2017056472A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108994016A (en) * | 2018-07-24 | 2018-12-14 | 彭圆 | A kind of method of industry high-salt wastewater processing |
CN112742061A (en) * | 2020-12-11 | 2021-05-04 | 安徽金禾实业股份有限公司 | Cooling device and cooling method for maltol sublimation section |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115350498A (en) * | 2022-07-20 | 2022-11-18 | 徐姣姣 | Amino acid recycling system |
Citations (3)
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WO2008023778A1 (en) * | 2006-08-21 | 2008-02-28 | Jfe Steel Corporation | Plating solution regenerating apparatus and method of regenerating plating solution |
JP2012000651A (en) * | 2010-06-18 | 2012-01-05 | Kubota Corp | Screw press |
JP2012246263A (en) * | 2011-05-30 | 2012-12-13 | Mitsubishi Rayon Co Ltd | Scraper unit for crystallizer of methacrylic acid, crystallizer and crystallization method |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2404451A1 (en) * | 1977-09-29 | 1979-04-27 | Duprat Jacques | Scraper for cylinder heat exchanger - incorporates elongated suction orifice extending over length allowing simultaneous recovery of fragments and fine particles of treated prod. |
JP4915174B2 (en) * | 2006-08-21 | 2012-04-11 | Jfeスチール株式会社 | Plating solution recycling apparatus and plating solution recycling method |
CN201361467Y (en) * | 2008-11-03 | 2009-12-16 | 四川宜宾江源化工机械制造有限责任公司 | Scraper sleeve-type crystallizer |
JP5394147B2 (en) | 2009-06-30 | 2014-01-22 | 三菱レイヨン株式会社 | (Meth) acrylic acid purification method |
CN204107083U (en) * | 2014-10-11 | 2015-01-21 | 宁波大学 | A kind of sedimentation and filtration crystallization kettle |
-
2016
- 2016-09-26 KR KR1020187008467A patent/KR102041940B1/en active IP Right Grant
- 2016-09-26 MY MYPI2018700073A patent/MY197377A/en unknown
- 2016-09-26 CN CN201680055889.0A patent/CN108025222B/en active Active
- 2016-09-26 WO PCT/JP2016/004337 patent/WO2017056472A1/en active Application Filing
- 2016-09-26 JP JP2016570136A patent/JP6237935B2/en active Active
- 2016-09-30 TW TW105131597A patent/TWI701073B/en active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008023778A1 (en) * | 2006-08-21 | 2008-02-28 | Jfe Steel Corporation | Plating solution regenerating apparatus and method of regenerating plating solution |
JP2012000651A (en) * | 2010-06-18 | 2012-01-05 | Kubota Corp | Screw press |
JP2012246263A (en) * | 2011-05-30 | 2012-12-13 | Mitsubishi Rayon Co Ltd | Scraper unit for crystallizer of methacrylic acid, crystallizer and crystallization method |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108994016A (en) * | 2018-07-24 | 2018-12-14 | 彭圆 | A kind of method of industry high-salt wastewater processing |
CN112742061A (en) * | 2020-12-11 | 2021-05-04 | 安徽金禾实业股份有限公司 | Cooling device and cooling method for maltol sublimation section |
Also Published As
Publication number | Publication date |
---|---|
MY197377A (en) | 2023-06-14 |
TW201718069A (en) | 2017-06-01 |
KR102041940B1 (en) | 2019-11-07 |
TWI701073B (en) | 2020-08-11 |
KR20180043820A (en) | 2018-04-30 |
JP6237935B2 (en) | 2017-11-29 |
CN108025222B (en) | 2020-05-01 |
CN108025222A (en) | 2018-05-11 |
JPWO2017056472A1 (en) | 2017-10-05 |
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