CN108607239A - Spiral microchannel demulsification control method on the basis of Dean Secondary Flows - Google Patents
Spiral microchannel demulsification control method on the basis of Dean Secondary Flows Download PDFInfo
- Publication number
- CN108607239A CN108607239A CN201810503819.8A CN201810503819A CN108607239A CN 108607239 A CN108607239 A CN 108607239A CN 201810503819 A CN201810503819 A CN 201810503819A CN 108607239 A CN108607239 A CN 108607239A
- Authority
- CN
- China
- Prior art keywords
- spiral microchannel
- microchannel
- demulsification
- secondary flows
- spiral
- 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
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
- B01D17/04—Breaking emulsions
- B01D17/045—Breaking emulsions with coalescers
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
It is disclosed by the invention be liquid-liquid diphase separation technology field a kind of Secondary Flow by Dean on the basis of spiral microchannel demulsification control method, when its key point is to adjust the flow of syringe pump or plunger pump, so as to be controlled on the basis of forming best Dean Secondary Flows in spiral microchannel, when De numbers are controlled 6.5~8, fluid flow rate is controlled according to the size of used spiral microchannel, can make to occur to the Dean Secondary Flows with optimum efficiency that are demulsified in spiral microchannel.The beneficial effects of the invention are as follows：The speed controlled fluid flow through on the basis of the size of used spiral microchannel, the De numbers of Dean Secondary Flows in spiral microchannel are made to control at 6.5~8, it can make to occur in spiral microchannel to the Dean Secondary Flows with optimum efficiency that are demulsified, so as to avoid the operation of adjusting flow rate of liquid repeatedly, it can directly determine the flow rate of liquid for reaching best demulsification, further improve demulsification efficiency and demulsification quality.
Description
Technical field
The present invention relates to the spirals on the basis of liquid-liquid two-phase laminated flow technical field more particularly to a kind of Secondary Flow by Dean
Microchannel demulsification control method.
Background technology
Liquid-liquid two-phase laminated flow is the important operation unit of chemical process, and it is many important works to efficiently separate equipment accordingly
The essential component part of skill.Liquid-liquid two-phase laminated flow is widely used in crude oil acquisition, petroleum transportation, Reaction Separation, extraction
It takes, a variety of important technical process such as sewage disposal.With the proposition of national environmental protection theory and the development of modern industry, have
Novel demulsification technology applied widely, environmental-friendly, that separative efficiency is high, low energy consumption has higher demand.
More advanced isolation technics includes cyclonic separation, electric demulsification, inclined plate sedimentation, embrane method, bioanalysis etc. at present, wherein
More representative is microchannel breaking method, such as CN104001349A, which uses three-dimensional
Spiral helicine microchannel, hydrophilic channel plate and hydrophobic channel plate, liquid-liquid diphase mixed liquor spiral advance along microchannel, constantly
By hydrophilic channel plate and hydrophobic channel plate, promote the collision coalescence of dispersed phase drop so that two-phase mixtures liquid is finally recovered.Text
In be only referred in helical channel with Dean Secondary Flows coupling droplet inertia migration mechanism, but do not know the machine
The influence to demulsification is managed, the demulsification of three-dimensional spiral microchannel cannot be played completely, it is therefore necessary to this be done further
Research.
Invention content
To overcome existing spiral microchannel not account for influence of the Dean Secondary Flows to demulsification, cause demulsification bad etc.
Deficiency, the technical problem to be solved by the present invention is to：A kind of spiral microchannel demulsification control on the basis of the Secondary Flow by Dean is provided
Method processed.
The technical solution adopted by the present invention to solve the technical problems is：
Spiral microchannel demulsification control method on the basis of Dean Secondary Flows, includes the following steps：
A, assembling three-dimensional spiral microchannel breaking device, using syringe pump or plunger pump by pending liquid and breaking device
Inlet opening connects, and the fluid hole of breaking device is connect by pipeline with liquid storage container；
B, start syringe pump or plunger pump, flow through spiral microchannel, the dispersed phase drop in emulsion is by micro-
Shearing force, the vortex directional migration effect of spiral microchannel and the interface interaction in hydrophilic-hydrophobic face in channel, promote phase
The polymerization that collides of adjacent drop forms big drop, and sedimentation separation is come from emulsion, realizes demulsification；
C, the flow for adjusting syringe pump or plunger pump, to reach best demulsification, wherein syringe pump or plunger pump
Flow so as to form best Dean Secondary Flows in spiral microchannel on the basis of controlled, Dean bis- times in spiral microchannel
The De numbers of stream are：Wherein thunder Lip river number Re is：
D in formulaiFor screw diameter, dcFor pipeline equivalent diameter, Re is Reynolds number, and ρ is emulsion density, and v is fluid stream
Speed, μ are coefficient of viscosity,
When De numbers are controlled 6.5~8, fluid flow rate is controlled according to the size of used spiral microchannel, can be made
Occur to the Dean Secondary Flows with optimum efficiency that are demulsified in spiral microchannel.
Further, before being demulsified can also fluid flow rate as quantitative, and pass through and select appropriate size
Spiral microchannel meets De numbers, to make occur to the Dean Secondary Flows with optimum efficiency that are demulsified in spiral microchannel.
Further, the De numbers in step c are 7.2.
The beneficial effects of the invention are as follows：The speed controlled fluid flow through based on the size of used spiral microchannel
Degree makes the De numbers of Dean Secondary Flows in spiral microchannel control at 6.5~8, can make to occur having demulsification in spiral microchannel
The Dean Secondary Flows for having optimum efficiency can directly be determined to reach best so as to avoid the operation of flow rate of liquid is adjusted repeatedly
The flow rate of liquid of demulsification further improves demulsification efficiency and quality.
Specific implementation mode
With reference to embodiment, the present invention is further described.
Spiral microchannel demulsification control method on the basis of Dean Secondary Flows, includes the following steps：
A, assembling three-dimensional spiral microchannel breaking device, using syringe pump or plunger pump by pending liquid and breaking device
Inlet opening connects, and the fluid hole of breaking device is connect by pipeline with liquid storage container；
B, start syringe pump or plunger pump, flow through spiral microchannel, water droplet by microchannel shearing force,
The vortex directional migration effect of spiral microchannel and the interface interaction in hydrophilic-hydrophobic face, promote adjacent water droplet to collide polymerization
Big water droplet is formed, and sedimentation separation is come from emulsion, realizes demulsification；
C, the flow for adjusting syringe pump, to reach best demulsification, the wherein flow of syringe pump so that spiral is micro- logical
It is formed for the purpose of best Dean Secondary Flows and is controlled in road, the De numbers of Dean Secondary Flows are in spiral microchannel：Wherein thunder Lip river number Re is：
D in formulaiFor screw diameter, dcFor pipeline equivalent diameter, Re is Reynolds number, and ρ is emulsion density, and v is fluid stream
Speed, μ are coefficient of viscosity,
When De numbers are controlled 6.5~8, fluid flow rate is controlled according to the size of used spiral microchannel, can be made
Occur to the Dean Secondary Flows with optimum efficiency that are demulsified in spiral microchannel.
Three-dimensional spiral microchannel described herein is roughly the same with the microchannel structure of Publication No. CN104001349A, base
This application method is similar, but when being passed through treatment fluid, and existing method is by observing the separation situation in liquid storage container come constantly
Flow rate of liquid is adjusted, until separation situation is stablized；And the flow rate of liquid in the application, it is so as to occur in three-dimensional spiral microchannel
De numbers are on the basis of 6.5~8 Dean Secondary Flows.It is obtained by theory analysis and a large amount of contrast tests, when De numbers are 6.5~8
Dean Secondary Flows demulsification can be made to reach best.Therefore, it by the De numbers and can be adopted when carrying out demulsification operation
The size of three-dimensional spiral microchannel directly calculates the flow velocity of liquid, it is not necessary to adjust repeatedly again, can greatly improve demulsification
Efficiency and demulsification quality.
Wherein the peak value of De numbers is 7.2, i.e., when De numbers are less than 7.2 with the increase of De numbers, can promote between drop
Coalescence, demulsification efficiency increase；When De numbers are more than 7.2 with the increase of De numbers, the coalescence being unfavorable between drop, demulsification effect
Rate reduces, and when De is equal to 7.2, demulsification efficiency reaches highest.
Before being demulsified can also fluid flow rate as quantitative, and by select the spiral microchannel of appropriate size come
Meet De numbers between 6.5~8, to equally make occur to the Dean bis- times with optimum efficiency that is demulsified in spiral microchannel
Stream.
Embodiment：
Helical form microchannel uses：Channel width 5mm, 200 μm of channel height, screw diameter are a kind of flat of 5mm
Helical form microchannel.It is calculated according to above-mentioned formula：
When the volume flow rate of import is 8mL/min, De numbers are 7.2, and the demulsification efficiency in once-through channel can be at this time
Reach 25%；
When import volume flow rate is 4mL/min, De numbers are 3.6, and the demulsification efficiency in once-through channel can reach at this time
16%；
When the volume flow rate of import is 12mL/min, De numbers are 10.8, and the demulsification efficiency in once-through channel can at this time
To reach 14%.
It can be seen that the efficiency highest that is demulsified when De numbers are 7.2, arrives peaking.
The speed that the present invention is controlled fluid flow through based on the size of used spiral microchannel keeps spiral micro- logical
The De numbers of Dean Secondary Flows are controlled at 6.5~8 in road, can make to occur to being demulsified with optimum efficiency in spiral microchannel
Dean Secondary Flows can directly determine the liquid for reaching best demulsification so as to avoid the operation of flow rate of liquid is adjusted repeatedly
Body flow velocity further improves demulsification efficiency and quality, has good practicability and application prospect, while also having filled up the neck
The technological gap in domain provides theoretical foundation for similar research.
Claims (3)
- The control method 1. the spiral microchannel on the basis of Dean Secondary Flows is demulsified, characterized in that include the following steps：A, assembling three-dimensional spiral microchannel breaking device, using syringe pump or plunger pump by the feed liquor of pending liquid and breaking device Hole connects, and the fluid hole of breaking device is connect by pipeline with liquid storage container；B, start syringe pump or plunger pump, flow through spiral microchannel, the dispersed phase drop of emulsion is by microchannel Shearing force, the vortex directional migration effect of spiral microchannel and the interface interaction in hydrophilic-hydrophobic face, promote adjacent drops The polymerization that collides forms big drop, and sedimentation separation is come from emulsion, realizes demulsification；C, the flow for adjusting syringe pump or plunger pump, to reach best demulsification, the wherein flow of syringe pump or plunger pump So as to be controlled on the basis of forming best Dean Secondary Flows in spiral microchannel, the Dean Secondary Flows in spiral microchannel De numbers are：Wherein reynolds number Re is：D in formulaiFor screw diameter, dcFor pipeline equivalent diameter, Re is Reynolds number, and ρ is emulsion density, and v is fluid flow rate, and μ is Coefficient of viscosity,When De numbers are controlled 6.5~8, fluid flow rate is controlled according to the size of used spiral microchannel, spiral can be made Occur to the Dean Secondary Flows with optimum efficiency that are demulsified in microchannel.
- 2. the spiral microchannel demulsification control method on the basis of Dean Secondary Flows as described in claim 1, it is characterized in that： Before being demulsified can also fluid flow rate as quantitative, and meet De numbers by selecting the spiral microchannel of appropriate size, To make occur to the Dean Secondary Flows with optimum efficiency that are demulsified in spiral microchannel.
- 3. the spiral microchannel demulsification control method on the basis of Dean Secondary Flows as claimed in claim 1 or 2, feature It is：De numbers in step c are 7.2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810503819.8A CN108607239B (en) | 2018-05-23 | 2018-05-23 | Spiral micro-channel demulsification control method based on Dean secondary flow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810503819.8A CN108607239B (en) | 2018-05-23 | 2018-05-23 | Spiral micro-channel demulsification control method based on Dean secondary flow |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108607239A true CN108607239A (en) | 2018-10-02 |
| CN108607239B CN108607239B (en) | 2020-06-26 |
Family
ID=63663842
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810503819.8A Active CN108607239B (en) | 2018-05-23 | 2018-05-23 | Spiral micro-channel demulsification control method based on Dean secondary flow |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108607239B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104001349A (en) * | 2014-06-20 | 2014-08-27 | 西南民族大学 | Micro-channel separator for liquid-liquid two-phase separation |
| CN104154798A (en) * | 2014-04-24 | 2014-11-19 | 中国科学院广州能源研究所 | Novel plane micro-channel heat exchanger |
| CN107344030A (en) * | 2017-09-14 | 2017-11-14 | 西南民族大学 | Breaking device and breaking method for w/o type emulsion |
-
2018
- 2018-05-23 CN CN201810503819.8A patent/CN108607239B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104154798A (en) * | 2014-04-24 | 2014-11-19 | 中国科学院广州能源研究所 | Novel plane micro-channel heat exchanger |
| CN104001349A (en) * | 2014-06-20 | 2014-08-27 | 西南民族大学 | Micro-channel separator for liquid-liquid two-phase separation |
| CN107344030A (en) * | 2017-09-14 | 2017-11-14 | 西南民族大学 | Breaking device and breaking method for w/o type emulsion |
Non-Patent Citations (1)
| Title |
|---|
| 王奎升等: "《工程流体与粉体力学基础》", 30 September 2002, 中国计量出版社 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108607239B (en) | 2020-06-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20170043306A1 (en) | Multi fluid injection mixer | |
| CN107075389B (en) | It is extracted from oil/water separator lotion and by being handled from same separator water dilution | |
| US9751092B2 (en) | Electrostatic coalescer and method for electrostatic coalescence | |
| CN104312616B (en) | Electric field and microchannel are coupled together and realize the method and device of Pickering emulsion breaking | |
| AU2009312944B2 (en) | Separation method and apparatus for immiscible fluids | |
| US20220396502A1 (en) | Bubble size monitoring and control | |
| CN109562305A (en) | Influence isolated method | |
| CN109135819B (en) | System and method for treating crude oil of oil well | |
| US20120285892A1 (en) | Separation Process | |
| CN108979616B (en) | Water diversion system and water diversion treatment method for wellhead produced materials | |
| US9452371B2 (en) | Method and system for phase inversion using a static mixer/coalescer | |
| CN113565480B (en) | Lipopeptide-containing composite oil displacement agent and use method thereof | |
| Wu et al. | Effects of secondary emulsification of ASP flooding produced fluid during surface processes on its oil/water separation performances | |
| CN108607239A (en) | Spiral microchannel demulsification control method on the basis of Dean Secondary Flows | |
| GB2447941A (en) | A process for treating slop mud | |
| WO2011129697A1 (en) | Device and method for coalescing droplets dispersed in a flowing mixture | |
| CN102575152A (en) | Treatment of Oil | |
| US10786757B2 (en) | Compact electrocoalescer with conical frustum electrodes | |
| CN100540128C (en) | Multi fluid injection mixer | |
| Westra et al. | Compact oil-water separation using the InLine ElectroCoalescer and the Cyclonic DeWaterer | |
| CA2893924A1 (en) | Pressure reduction device with cyclonic flow for emulsion separation process | |
| Lü et al. | De-emulsification of 2-ethyl-1-hexanol/water emulsion using oil-wet narrow channel combined with low-speed rotation | |
| CN105126386B (en) | Enriching device and method based on liquid-liquid extraction | |
| CN204897482U (en) | Parallel liquid of bipyramid - liquid coalescence board of separator packs | |
| US20230271111A1 (en) | Supramolecular Host Guest Product Concentrators For Production Fluids |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |