JPH10513100A - 液体又は懸濁液混合のための混合機及び混合方法 - Google Patents
液体又は懸濁液混合のための混合機及び混合方法Info
- Publication number
- JPH10513100A JPH10513100A JP8513840A JP51384096A JPH10513100A JP H10513100 A JPH10513100 A JP H10513100A JP 8513840 A JP8513840 A JP 8513840A JP 51384096 A JP51384096 A JP 51384096A JP H10513100 A JPH10513100 A JP H10513100A
- Authority
- JP
- Japan
- Prior art keywords
- mixing
- mixing chamber
- chamber
- liquid
- mixer
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/80—Mixing plants; Combinations of mixers
- B01F33/82—Combinations of dissimilar mixers
- B01F33/821—Combinations of dissimilar mixers with consecutive receptacles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/40—Mixing liquids with liquids; Emulsifying
- B01F23/43—Mixing liquids with liquids; Emulsifying using driven stirrers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
- B01F27/87—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis the receptacle being divided into superimposed compartments
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/50—Mixing receptacles
- B01F35/53—Mixing receptacles characterised by the configuration of the interior, e.g. baffles for facilitating the mixing of components
- B01F35/531—Mixing receptacles characterised by the configuration of the interior, e.g. baffles for facilitating the mixing of components with baffles, plates or bars on the wall or the bottom
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
- Detergent Compositions (AREA)
Abstract
Description
Claims (1)
- 【特許請求の範囲】 1.液体又は懸濁液を混合する混合機において、それぞれ外部投入口(10、 12)が設けられた2個の混合室(2、3)を有して成り、第1混合室(2)は 第2混合室(3)と比較して容量が小さく、それら混合室は、第1混合室(2) が第2混合室(3)に連絡しており、多くの混合要素(6、7)が回転軸(5) に配置され、該回転軸は前記両混合室に共通であり、前記混合要素は前記2つの 混合室で異なった形状を有しており、第1混合室(2)における混合要素(6) は、大きい剪断力によって混合が行われるような配置となっており、第2混合室 (3)における混合要素(7)は、主として剪断力によらない撹拌によって混合 が行われるような配置となっていることを特徴とする混合機。 2.第1混合室(2)が第2混合室(3)より上に配置されていることを特徴 とする請求項1の混合機。 3.第1混合室の混合要素(6)が、シャベルが設けられたタービン翼車から なることを特徴とする請求項1ないし2の混合機。 4.第2混合室の混合要素(7)がプロペラ形状のアジテータからなることを 特徴とする請求項1ないし3の混合機。 5.上側混合室と下側混合室の両方の混合室壁に流動撹乱バッフル板(8、9 )が設けられていることを特徴とする請求項1ないし4の混合機。 6.上側混合室と下側混合室のいずれも、混合要素間に配置された環状水平板 (14、15)によって、多くの部分空間に分割され、該空間で別個の渦流が形 成されることを特徴とする請求項1ないし5の混合機。 7.回転軸が、回転速度可変のモーター(4)によって駆動されることを特徴 とする前述の請求項のいずれかによる混合機。 8.請求項1記載の混合機での連続混合方法であって、高剪断力によって混合 が起こる第1混合室で、少量の第1の液体をかなり多量の第2の液体と混合し、 その後、得られた混合物を第2混合室に送り、そこで主として剪断力によらない 撹拌によって混合を行うことを特徴とする前記方法。 9.第1の液体が酸、苛性溶液又は酸化防止剤などの化学添加剤からなり、第 2の液体が植物油からなることを特徴とする請求項8の方法。 10.化学添加剤を第1混合室で植物油の部分流と混合し、残りの植物油を第 2混合室で加えることを特徴とする請求項8ないし9の方法。 11.酸などの化学添加剤を第1混合室で全植物油流と混合し、得られた混合 液に第2混合室で、苛性溶液などの第2の化学添加剤を加えることを特徴とする 請求項8ないし10の方法。
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE9403660-5 | 1994-10-25 | ||
| SE9403660A SE503898C2 (sv) | 1994-10-25 | 1994-10-25 | Blandare för blandning av vätskor eller suspensioner samt förfarande för blandning |
| PCT/SE1995/001252 WO1996012555A1 (en) | 1994-10-25 | 1995-10-23 | Mixer for mixing of liquids or suspensions and method for mixing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10513100A true JPH10513100A (ja) | 1998-12-15 |
| JP3133340B2 JP3133340B2 (ja) | 2001-02-05 |
Family
ID=20395744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP08513840A Expired - Fee Related JP3133340B2 (ja) | 1994-10-25 | 1995-10-23 | 液体又は懸濁液混合のための混合機及び混合方法 |
Country Status (16)
| Country | Link |
|---|---|
| US (1) | US6024481A (ja) |
| EP (1) | EP0788400B1 (ja) |
| JP (1) | JP3133340B2 (ja) |
| KR (1) | KR100341422B1 (ja) |
| CN (1) | CN1047955C (ja) |
| AT (1) | ATE218390T1 (ja) |
| AU (1) | AU693276B2 (ja) |
| BR (1) | BR9509428A (ja) |
| CA (1) | CA2203696C (ja) |
| DE (2) | DE788400T1 (ja) |
| DK (1) | DK0788400T3 (ja) |
| ES (1) | ES2177663T3 (ja) |
| MY (1) | MY116378A (ja) |
| NZ (1) | NZ294976A (ja) |
| SE (1) | SE503898C2 (ja) |
| WO (1) | WO1996012555A1 (ja) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003105343A (ja) * | 2001-09-27 | 2003-04-09 | Toshiba Eng Co Ltd | 高分子化合物の改質方法および装置 |
| JP2003260350A (ja) * | 2001-12-26 | 2003-09-16 | Toshio Shimoda | 流動円盤式攪拌装置とこの攪拌装置を用いた流動円盤式化合物連続合成装置および連続合成方法 |
| JP2008200565A (ja) * | 2007-02-16 | 2008-09-04 | Nishihara Environment Technology Inc | 生物処理装置 |
| JP2012533420A (ja) * | 2009-07-23 | 2012-12-27 | エム・エス・ディー・オス・ベー・フェー | 粘膜を保存するための装置および方法 |
| KR101227979B1 (ko) * | 2011-06-02 | 2013-02-01 | 경상대학교산학협력단 | 핀을 이용한 교반용기 및 이를 포함하는 교반능력이 향상된 교반기 |
| JP2019025712A (ja) * | 2017-07-27 | 2019-02-21 | 強化土エンジニヤリング株式会社 | シリカグラウトの製造装置および製造方法 |
| WO2019225502A1 (ja) * | 2018-05-21 | 2019-11-28 | プライミクス株式会社 | 攪拌装置 |
Families Citing this family (31)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL1010913C2 (nl) * | 1998-12-29 | 2000-06-30 | Theodorus Jozef Bierman | Inrichting en werkwijze voor het activeren van polymeerproducten in een oplosmiddel. |
| DE69916436D1 (de) * | 1999-06-15 | 2004-05-19 | Pfaudler Werke Gmbh | Vorrichtung zum Füllen des Behälters eines Mischers |
| RU2162733C1 (ru) * | 1999-06-15 | 2001-02-10 | Тамбовский государственный технический университет | Реактор-полимеризатор |
| CN1157504C (zh) * | 2000-03-21 | 2004-07-14 | 亚洲电镀器材有限公司 | 混合设备 |
| GB0111704D0 (en) | 2001-05-14 | 2001-07-04 | Ciba Spec Chem Water Treat Ltd | Apparatus and method for wetting powder |
| DE10141302B4 (de) * | 2001-08-28 | 2004-03-25 | Lipp Mischtechnik Gmbh | Mischvorrichtung mit Propeller im Zuführschacht |
| KR100491540B1 (ko) * | 2002-07-12 | 2005-05-24 | 군산대학교산학협력단 | 도료 분산 및 혼합장치 |
| US7153480B2 (en) * | 2003-05-22 | 2006-12-26 | David Robert Bickham | Apparatus for and method of producing aromatic carboxylic acids |
| EP1807186B1 (en) * | 2004-09-15 | 2012-08-22 | Kureha Corporation | Apparatus and method for solid-liquid contact |
| EP1787712A1 (de) * | 2005-11-17 | 2007-05-23 | Sika Technology AG | Mischvorrichtung für Flüssigkeiten |
| KR100724600B1 (ko) | 2006-05-29 | 2007-06-04 | (주)흥원피앤엠 | 연속식 믹싱장치 |
| KR101002216B1 (ko) * | 2008-10-21 | 2010-12-20 | 경상대학교산학협력단 | 배플을 이용한 교반용기 및 이를 포함하는 교반능력이 향상된 교반기 |
| RU2379098C1 (ru) * | 2008-10-29 | 2010-01-20 | Государственное образовательное учреждение высшего профессионального образования "Санкт-Петербургский государственный технологический институт (технический университет)" | Пульсационно-центробежный смеситель |
| RU2673525C2 (ru) | 2009-11-02 | 2018-11-27 | Мэннкайнд Корпорэйшн | Способ для производства микрочастиц соединения |
| EP2598538B1 (en) * | 2010-07-30 | 2016-10-26 | Total Research & Technology Feluy | Use of a catalyst slurry preparation system |
| WO2013063294A1 (en) | 2011-10-27 | 2013-05-02 | Graco Minnesota Inc. | Melter cartridge |
| IN2014DN03195A (ja) | 2011-10-27 | 2015-05-22 | Graco Minnesota Inc | |
| KR101227346B1 (ko) * | 2012-05-24 | 2013-01-28 | (주)다이노 | 액체인공수분 교배용 분무장치 |
| CN103084113B (zh) * | 2013-01-21 | 2015-07-15 | 慈溪市雪江电器厂 | 一种牡丹精油脚气油的生产设备 |
| FR3012143B1 (fr) | 2013-10-18 | 2016-08-26 | Arkema France | Cuve d'hydrolyse dans un procede d'amidification de cyanohydrine d'acetone |
| US20160121276A1 (en) * | 2014-10-31 | 2016-05-05 | Quantum Technologies, Inc. | Dynamic mixing assembly with improved baffle design |
| US9796492B2 (en) | 2015-03-12 | 2017-10-24 | Graco Minnesota Inc. | Manual check valve for priming a collapsible fluid liner for a sprayer |
| CN105311994B (zh) * | 2015-12-11 | 2018-06-19 | 德文能源股份有限公司 | 润滑油搅拌混合釜 |
| FI128345B (en) * | 2016-08-05 | 2020-03-31 | Neste Oyj | Method for cleaning the feed |
| KR200490528Y1 (ko) | 2017-12-28 | 2019-11-26 | 주식회사 운영 | 퓨즈의 설치 구조가 개선된 트랜스포머 |
| KR200490527Y1 (ko) | 2017-12-28 | 2019-11-26 | 주식회사 운영 | 보호 부재를 구비한 안전 트랜스포머 |
| TWI855085B (zh) | 2019-05-31 | 2024-09-11 | 美商葛萊兒明尼蘇達股份有限公司 | 手持式流體噴霧器 |
| CN110743447B (zh) * | 2019-10-15 | 2021-10-08 | 北京润美玉之光医疗美容门诊部 | 一种提高自体脂肪移植成活率的方法 |
| US11833479B2 (en) | 2020-03-26 | 2023-12-05 | Chevron Phillips Chemical Company Lp | Catalyst slurry mixing process and system |
| CN112473542A (zh) * | 2020-11-24 | 2021-03-12 | 江门市新会区美亚化工有限公司 | 一种用于纺织助剂生产的高效混料加料装置 |
| JPWO2023228534A1 (ja) * | 2022-05-26 | 2023-11-30 |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US531718A (en) * | 1895-01-01 | And marshall g | ||
| US776383A (en) * | 1903-12-14 | 1904-11-29 | Benjamin R Bryan | Churn. |
| US2438204A (en) * | 1943-06-10 | 1948-03-23 | Du Pont | Nitration apparatus |
| US3179380A (en) * | 1959-11-02 | 1965-04-20 | Dow Chemical Co | Apparatus for coagulation of colloidal dispersions |
| US3194638A (en) * | 1962-11-21 | 1965-07-13 | Kimberly Clark Co | Combined slaker-causticizer apparatus |
| IT985192B (it) * | 1973-05-23 | 1974-11-30 | Colgate Palmolive Co | Apparecchio e procedimento per miscelare materiali particella ri con liquidi o altri materia li particellari |
| US4021021A (en) * | 1976-04-20 | 1977-05-03 | Us Energy | Wetter for fine dry powder |
| FR2441425A1 (fr) * | 1978-11-15 | 1980-06-13 | Nickel Le | Procede et dispositif d'attrition en voie humide |
| US4483624A (en) * | 1982-08-25 | 1984-11-20 | Freeport Kaolin Company | High intensity conditioning mill and method |
| CA1225634A (en) * | 1984-07-30 | 1987-08-18 | Adam J. Bennett | Apparatus for dispersing a particulate material in a liquid |
| GB8617569D0 (en) * | 1986-07-18 | 1986-08-28 | Davidson J F | Impellers |
| US5211924A (en) * | 1988-02-29 | 1993-05-18 | Amoco Corporation | Method and apparatus for increasing conversion efficiency and reducing power costs for oxidation of an aromatic alkyl to an aromatic carboxylic acid |
| US4930576A (en) * | 1989-04-18 | 1990-06-05 | Halliburton Company | Slurry mixing apparatus |
| SE464318B (sv) * | 1990-02-28 | 1991-04-08 | Flygt Ab | Axelkonstruktion foer en med pumphjulet roterande omroerare |
| DE69122333T2 (de) * | 1990-08-07 | 1997-02-06 | Shinko Pantec Co Ltd | Mischapparat |
| US5511881A (en) * | 1995-01-06 | 1996-04-30 | General Signal Corporation | Impeller system and method for enhanced-flow pumping of liquids |
-
1994
- 1994-10-25 SE SE9403660A patent/SE503898C2/sv not_active IP Right Cessation
-
1995
- 1995-10-20 MY MYPI95003154A patent/MY116378A/en unknown
- 1995-10-23 EP EP95936173A patent/EP0788400B1/en not_active Expired - Lifetime
- 1995-10-23 JP JP08513840A patent/JP3133340B2/ja not_active Expired - Fee Related
- 1995-10-23 CA CA002203696A patent/CA2203696C/en not_active Expired - Fee Related
- 1995-10-23 DE DE0788400T patent/DE788400T1/de active Pending
- 1995-10-23 CN CN95196634A patent/CN1047955C/zh not_active Expired - Lifetime
- 1995-10-23 WO PCT/SE1995/001252 patent/WO1996012555A1/en not_active Ceased
- 1995-10-23 ES ES95936173T patent/ES2177663T3/es not_active Expired - Lifetime
- 1995-10-23 AT AT95936173T patent/ATE218390T1/de active
- 1995-10-23 DE DE69526955T patent/DE69526955T2/de not_active Expired - Lifetime
- 1995-10-23 KR KR1019970702701A patent/KR100341422B1/ko not_active Expired - Fee Related
- 1995-10-23 AU AU38211/95A patent/AU693276B2/en not_active Ceased
- 1995-10-23 US US08/817,533 patent/US6024481A/en not_active Expired - Lifetime
- 1995-10-23 NZ NZ294976A patent/NZ294976A/xx not_active IP Right Cessation
- 1995-10-23 DK DK95936173T patent/DK0788400T3/da active
- 1995-10-23 BR BR9509428A patent/BR9509428A/pt not_active IP Right Cessation
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003105343A (ja) * | 2001-09-27 | 2003-04-09 | Toshiba Eng Co Ltd | 高分子化合物の改質方法および装置 |
| JP2003260350A (ja) * | 2001-12-26 | 2003-09-16 | Toshio Shimoda | 流動円盤式攪拌装置とこの攪拌装置を用いた流動円盤式化合物連続合成装置および連続合成方法 |
| JP2008200565A (ja) * | 2007-02-16 | 2008-09-04 | Nishihara Environment Technology Inc | 生物処理装置 |
| JP2012533420A (ja) * | 2009-07-23 | 2012-12-27 | エム・エス・ディー・オス・ベー・フェー | 粘膜を保存するための装置および方法 |
| KR101227979B1 (ko) * | 2011-06-02 | 2013-02-01 | 경상대학교산학협력단 | 핀을 이용한 교반용기 및 이를 포함하는 교반능력이 향상된 교반기 |
| WO2012165891A3 (ko) * | 2011-06-02 | 2013-03-28 | 경상대학교산학협력단 | 핀을 이용한 교반용기 및 이를 포함하는 교반능력이 향상된 교반기 |
| JP2019025712A (ja) * | 2017-07-27 | 2019-02-21 | 強化土エンジニヤリング株式会社 | シリカグラウトの製造装置および製造方法 |
| WO2019225502A1 (ja) * | 2018-05-21 | 2019-11-28 | プライミクス株式会社 | 攪拌装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| SE9403660D0 (sv) | 1994-10-25 |
| SE9403660L (sv) | 1996-04-26 |
| DE788400T1 (de) | 2001-05-23 |
| NZ294976A (en) | 1999-06-29 |
| BR9509428A (pt) | 1998-01-06 |
| CN1168643A (zh) | 1997-12-24 |
| DE69526955T2 (de) | 2003-01-16 |
| AU693276B2 (en) | 1998-06-25 |
| CA2203696C (en) | 2003-12-30 |
| EP0788400B1 (en) | 2002-06-05 |
| AU3821195A (en) | 1996-05-15 |
| ATE218390T1 (de) | 2002-06-15 |
| DE69526955D1 (de) | 2002-07-11 |
| EP0788400A1 (en) | 1997-08-13 |
| CN1047955C (zh) | 2000-01-05 |
| WO1996012555A1 (en) | 1996-05-02 |
| SE503898C2 (sv) | 1996-09-30 |
| MY116378A (en) | 2004-01-31 |
| KR100341422B1 (ko) | 2002-08-22 |
| ES2177663T3 (es) | 2002-12-16 |
| DK0788400T3 (da) | 2002-09-23 |
| CA2203696A1 (en) | 1996-05-02 |
| JP3133340B2 (ja) | 2001-02-05 |
| US6024481A (en) | 2000-02-15 |
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