(US10441938) Fluid flow continuous physical or chemical processes using dean vortices 机翻标题: 暂无翻译,请尝试点击翻译按钮。

源语言标题
(US10441938) Fluid flow continuous physical or chemical processes using dean vortices
公开号/公开日
US10441938 US20150273430 / 2019-10-15 2015-10-01
申请号/申请日
US14/434,689 / 2013-10-11
发明人
ROELANDS CORNELIS PETRUS MARCUS LEXMOND AXEL SEBASTIAAN GOETHEER EARL LAWRENCE VINCENT GEERS LEONARD FERDINAND GERARD
申请人
NEDERLANDSE ORGANISATIE VOOR TOEGEPAST NATUURWETENSCHAPPELIJK ONDERZOEK TNO
主分类号
IPC分类号
B01F-005/06 B01J-019/18 B01J-019/24
摘要
(US10441938)
The invention is directed to a method for carrying out a continuous physical or chemical process, in particular crystallization. The method of the invention comprises: comprising—flowing a fluid through a channel comprising an inlet and an outlet for said fluid, wherein said channel is at least in part curved and comprises at least two curvatures,—allowing said process to occur at least in part in said fluid in the presence of Dean vortices in said fluid, while—reversing the direction of the flow of said fluid in said channel multiple times, wherein Dean vortices in the fluid in the channel are maintained while the flow is reversed.
机翻摘要
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地址
代理人
(US10441938) Lucas & Mercanti, LLP
代理机构
优先权号
2012EP-0188385 2013WO-NL50728
主权利要求
(US10441938)
The invention claimed is:
1. Method for carrying out a continuous physical or chemical process comprising the steps of: 
 i) flowing a fluid through a channel comprising an inlet and an outlet for said fluid, wherein said channel is at least in part curved and comprises at least two curvatures, 
 ii) allowing said process to occur at least in part in said fluid in the presence of Dean vortices in said fluid, while 
 iii) reversing the direction of the flow of said fluid in said channel multiple times, wherein Dean vortices in the fluid in the channel are maintained while the flow is reversed, and 
 repeating step iii) at least once in the continuous process, 
 wherein during reversal, 
  relaxation time as defined by Tν is greater than reversal time as defined by Tf, both measured in seconds, whereby (fd2/ν)>1, 
  f=1/Tf where Tf is a period in seconds where the fluid has a volumetric flow rate of less than 25% of a mean volumetric flow rate of the fluid, and the mean volumetric flow rate is per time period between two reversals of the direction of the flow, 
  d is the internal diameter of the channel measured in meters, and 
  ν is the kinematic viscosity of the fluid in meters2/second.
2. Method according to claim 1, wherein the Dean vortices in the fluid are maintained by reversing the direction of the flow of said fluid in said channel such that that the Dean number De of the flow of the fluid is 10 or more for 90% or more of the time.
3. Method according to claim 1, wherein a step of reversing the direction of the flow comprises the consecutive steps of: reducing the flow rate, reversing the flow and increasing the flow rate of said fluid in said channel, such that the fraction of the time wherein the fluid has a volumetric flow rate of less than 25% of the mean volumetric flow rate of the fluid per time period between two reversals of the direction of the flow is less than 10%.
4. Method according to claim 3, wherein the time period between two reversals of the direction of the flow comprises a step wherein the flow rate is essentially constant, and the ratio of the duration of a step wherein the flow rate is essentially constant and the duration of a step of reversing the direction of the flow is 5:1 or more.
5. Method according to claim 1, wherein said process comprises a multiphase reaction.
6. Method according to claim 1, wherein said process comprises crystallization of a liquid compound or of a compound dissolved in said fluid.
7. Method according to claim 1, wherein said reversing the direction of the flow of said fluid in said channel comprises changing the direction of the flow along the channel pathway whereby said fluid is flown through the channel by a combination of a first constant flow and a second oscillatory flow.
8. Method according to claim 1, wherein the direction of the flow is reversed each 60 seconds or less.
9. Method according to claim 1, wherein the direction of the flow is reversed by applying high pressure at one end of the channel or low pressure at another end of the channel.
10. Method according to claim 1, wherein said fluid is flowed alternately in the backward and forward direction in the channel, wherein a period wherein said fluid is flowed in the axial direction of the channel from inlet to outlet for the fluid in the channel is a forward flow step and a period wherein said fluid is flowed in the axial direction of the channel from outlet to inlet for the fluid in the channel is a backward flow step, wherein the channel comprises a helical tubular channel with a plurality of turns, and wherein the fluid flows forward through 0.1-100 turns in a forward flow step.
11. Method according to claim 10, wherein the fluid flows forward through 1-25 turns in a forward flow step and wherein the ratio between displaced fluid volume in a forward flow step and the displaced fluid volume in a backward flow step is more than 1.
12. Method according to claim 1, wherein the distance obtained by dividing the displaced fluid volume of a forward flow step by the cross-sectional area of the channel, moved by the fluid in the channel in a forward flow step is 10 times or more the inner diameter of the channel, wherein the channel has a constant cross-sectional area and inner diameter.
13. Method according to claim 1, wherein the flow of the fluid has a Dean number De of less than 3000.
14. Method according to claim 1 carried out in an apparatus, comprising 
 a channel for flowing a fluid through said channel, wherein said channel is at least in part curved and comprises at least two curvatures, and 
 one or more pulsating units for reversing the flow of said fluid in said channel, wherein said channel comprises a helical tube with a plurality of turns, wherein said plurality of turns is 2-10,000 turns, wherein said helical tube is a circular helix tube, wherein said channel is axially curved over 50% or more by length of the channel, and wherein Di/D is 0.01 or more, wherein Di is the inner diameter of said channel and D is the diameter of curvature of said channel.
15. Method according to claim 1, wherein the fluid has a laminar flow field with laminar mixing.
16. Method according to claim 1, wherein the fluid is flowed with a shear rate of 1-100 s−1.
17. Method according to claim 1, wherein the physical or chemical process comprises crystallization or recrystallization of a fat compound.
18. Method according to claim 5, wherein said multiphase reaction involves one or more selected from the group consisting of crystallization, heterogeneous catalysis, phase transfer catalysis, emulsion polymerization, hydrogenation, oxidation and hydroformylation.
19. Method according of claim 6, wherein the direction of the flow is reversed 10 or more times during passage of fluid through the channel or during the physical or chemical process.
20. Method according of claim 19, wherein the direction of the flow is reversed 50 or more times during passage of fluid through the channel or during the physical or chemical process.
21. Method according of claim 20 wherein the direction of the flow is reversed 100-10,000 times during passage of fluid through the channel or during the physical or chemical process.
22. Method according to claim 8, wherein the direction of the flow is reversed each 30 seconds or less.
23. Method according to claim 22, wherein the direction of the flow is reversed each 0.1-10 seconds.
法律状态
GRANTED
专利类型码
B2 A1
国别省市代码
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