CN102160972A - Method for strengthening mixing of micro-dispersion air bubbles - Google Patents
Method for strengthening mixing of micro-dispersion air bubbles Download PDFInfo
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- CN102160972A CN102160972A CN2011100635275A CN201110063527A CN102160972A CN 102160972 A CN102160972 A CN 102160972A CN 2011100635275 A CN2011100635275 A CN 2011100635275A CN 201110063527 A CN201110063527 A CN 201110063527A CN 102160972 A CN102160972 A CN 102160972A
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- bubble
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Abstract
The invention discloses a method for strengthening the mixing of micro-dispersion air bubbles and belongs to the technical field of chemical industry, in particular to a method for intensifying system turbulence and strengthening the mixing by utilizing micro-dispersion air bubbles. The method comprises the following steps of: making gases pass through micropores, and dispersing the gases from a vertical direction to horizontally flowing fluid A; shearing the gases into micro air bubbles through cross flow, making the micro air bubbles flow along with the fluid A, making fluid B pass through other micropores, and dispersing from the vertical direction to the fluid A containing the air bubbles so as to mix the fluid A and the fluid B, wherein the gases are insoluble to the fluid A and the fluid B. The method can strengthen system mixing and create conditions for strengthening mass transfer and reaction, and is low in process cost, high in processing capacity, easy and convenient to operate and high in repeatability and stability.
Description
Technical field
The invention belongs to chemical technology field, the diffusing bubble of particularly a kind of differential is strengthened the method for mixing, and specifically, relates to a kind of method of utilizing micropore to disperse the turbulence of bubble aggravation system, reinforcement to mix.
Background technology
The reinforcement of mixed process is the important step that chemical process improves and product quality improves, and generally rapid mixing is for improving transmission efficiency, guaranteeing that process safety is controlled significant.Since the nineties in 20th century, it is increasing to strengthen the research that mixes and keep the safety in production by microminiaturized multiplexer spare, method at present commonly used mainly contains: the design of (1) passive mixing that declines-by micro-structural, increase the contact area between fluid, reduce the diffuse fluid distance and realize convective flow between fluid; (2) active mixing-, realize as invigoration effects such as electric field, temperature field, magnetic field and ultrasonic fields by the outfield.These methods or limit by micro equipment structure and system, limited to the raising of mixed performance; Perhaps complex process, cost are higher.
On the other hand, utilize the turbulence of the diffusing bubble aggravation of differential system to be mixed with good performance for reinforcement, system heat and mass efficient height helps the solution process because of transmitting the security that causes, the problem of poor controllability of limiting.
Summary of the invention
The present invention is intended to propose the method that a kind of new reinforcement mixes.Its principle is: utilize the micropore of fluid shearing to disperse to have obtained the small bubble of a large amount of yardsticks, make the turbulence aggravation in the system, guaranteed the uniformity of mixing simultaneously, thereby realize the rapid mixing between different fluid, create conditions for strengthening mass transfer and reaction.
The diffusing bubble of differential provided by the invention is strengthened the method for mixing, gas is passed through micropore, be distributed to the A fluid of bottom horizontal flow sheet from vertical direction, gas is cut into micro-bubble by cross-flow, flow with the A fluid, the B fluid by other micropore, is distributed to the A fluid that contains bubble from vertical direction more afterwards, realizes the mixing of A fluid and B fluid.
Described gas is insoluble to A fluid and B fluid.
Select gas according to A fluid and B fluid, if be insoluble to A fluid and B fluid, not with system in each reactant and product generation chemical reaction.With H
2SO
4Solution is as the B fluid, with NaOH, H
3BO
3, KI and KIO
3Solution during as the A fluid, the gas that can adopt is listed below: gases such as nitrogen, argon gas, helium.
Described micropore equivalent diameter is 0.2～1000 micron.
The present invention gives suitable A flow rate of fluid, the B fluid passes through micropore speed by the speed and the gas of micropore, and the A flow rate of fluid is 0.1～5m/s, and gas is 1～20m/s by the speed of micropore, and the B fluid is 0.1～5m/s by the speed of micropore.
Specifically, the method for the invention comprises the steps:
1) the A fluid is flowed by flow velocity 0.1～5m/s;
2) gas is passed micropore with the flow velocity of 1～20m/s after, join the A fluid of bottom horizontal flow sheet from vertical direction, disperse wherein with the form of micro-bubble;
3) make the B fluid pass other micropore with the flow velocity of 0.1～5m/s after, join the above-mentioned A fluid that has disperseed bubble from vertical direction, realize the mixing of A fluid and B fluid.
Method of the present invention has realized the rapid mixing between A fluid and B fluid under the effect of the diffusing bubble aggravation of differential system turbulence.
Beneficial effect of the present invention is: utilize the method can fortification system to mix, create conditions for strengthening mass transfer and reaction, its technology cost is low, disposal ability is big, easy and simple to handle, repeatability and good stability.
The specific embodiment
The following examples can make those skilled in the art more fully understand the present invention, but do not limit the present invention in any way.
Comparative Examples 1:
Characterize mixed performance by " Villermaux/Dushman " reaction system.This reaction system comprises an acid-base neutralization reaction and an oxidation reaction, and reactions steps is as follows:
In above-mentioned reaction, (1) is the acid-base neutralization reaction, and reaction speed is exceedingly fast, and is a transient response.The kinetics of reaction (2) is more complicated then, and reaction rate is relevant with the ionic strength I of system.The I that generates
2Be converted into rapidly
, detect by ultra-violet absorption spectrum in the experiment
Concentration, can calculate the reaction growing amount of reaction (2).Its yield is Y when reaction (2) takes place, and is in complete nonideality when mixing, and (1) reacts by stoichiometric proportion with (2), and this moment, yield was Y
ST, factor X is separated in definition
S=Y/Y
ST, be used to characterize the quantitative target of mixed performance.For desirable rapid mixing, X
SBe 0; And extremely slow when mixing rate, when being in complete imperfect admixture, X
SBe 1.Generally speaking, X
SBe between 0 to 1, the more little expression mixing of numerical value is unreasonable to be thought.
In the experiment with H
2SO
4Solution is as the B fluid, NaOH, H
3BO
3, KI and KIO
3Solution as the A fluid.In traditional stirred reactor, B directly adds among the A and mixes with it, utilizes ultra-violet absorption spectrum to detect production concentration, and calculating the separation factor is 0.13.
Comparative Examples 2:
Characterize mixed performance by " Villermaux/Dushman " reaction system.In the experiment with H
2SO
4Solution is as the B fluid, NaOH, H
3BO
3, KI and KIO
3Solution as the A fluid.Under the effect of pressure reduction, it is that 200 microns micropore and flow velocity is that the A fluid of 0.2m/s mixes that the B fluid passes equivalent diameter with the flow velocity of 1m/s, utilizes ultra-violet absorption spectrum to detect production concentration, calculates that to separate the factor be 0.0242.
Embodiment 1:
Characterize mixed performance by " Villermaux/Dushman " reaction system.In the experiment with H
2SO
4Solution is as the B fluid, NaOH, H
3BO
3, KI and KIO
3Solution as the A fluid.It is 0.2 micron micropore that the nitrogen of 0.2MPa is passed equivalent diameter with the flow velocity of 2m/s, joins the A fluid that flow velocity is 0.2m/s from vertical direction, disperses wherein with the form of micro-bubble.Afterwards under the effect of pressure reduction, it is that 200 microns micropore mixes with the A fluid that disperses bubble that the B fluid passes equivalent diameter with the flow velocity of 1m/s, utilizes ultra-violet absorption spectrum to detect production concentration, calculates that to separate the factor be 0.0091.
Comparative Examples 3:
Characterize mixed performance by " Villermaux/Dushman " reaction system.In the experiment with H
2SO
4Solution is as the B fluid, NaOH, H
3BO
3, KI and KIO
3Solution as the A fluid.Under the effect of pressure reduction, it is that 600 microns micropore and flow velocity is that the A fluid of 1m/s mixes that the B fluid passes equivalent diameter with the flow velocity of 0.2m/s, utilizes ultra-violet absorption spectrum to detect production concentration, calculates that to separate the factor be 0.0120.
Embodiment 2:
Characterize mixed performance by " Villermaux/Dushman " reaction system.In the experiment with H
2SO
4Solution is as the B fluid, NaOH, H
3BO
3, KI and KIO
3Solution as the A fluid.It is 0.2 micron micropore that the argon gas of 0.2MPa is passed equivalent diameter with the flow velocity of 5m/s, joins the A fluid that flow velocity is 1m/s from vertical direction, disperses wherein with the form of micro-bubble.Afterwards under the effect of pressure reduction, it is that 200 microns micropore mixes with the A fluid that disperses bubble that the B fluid passes equivalent diameter with the flow velocity of 0.2m/s, utilizes ultra-violet absorption spectrum to detect production concentration, calculates that to separate the factor be 0.0078.
Embodiment 3:
Characterize mixed performance by " Villermaux/Dushman " reaction system.In the experiment with H
2SO
4Solution is as the B fluid, NaOH, H
3BO
3, KI and KIO
3Solution as the A fluid.It is 0.2 micron micropore that the helium of 0.2MPa is passed equivalent diameter with the flow velocity of 1m/s, joins the A fluid that flow velocity is 0.1m/s from vertical direction, disperses wherein with the form of micro-bubble.Afterwards under the effect of pressure reduction, it is that 1000 microns micropore mixes with the A fluid that disperses bubble that the B fluid passes equivalent diameter with the flow velocity of 0.1m/s, utilizes ultra-violet absorption spectrum to detect production concentration, calculates that to separate the factor be 0.0083.
Comparative Examples 4:
Characterize mixed performance by " Villermaux/Dushman " reaction system.In the experiment with H
2SO
4Solution is as the B fluid, NaOH, H
3BO
3, KI and KIO
3Solution as the A fluid.Under the effect of pressure reduction, it is that 200 microns micropore and flow velocity is that the A fluid of 1m/s mixes that the B fluid passes equivalent diameter with the flow velocity of 5m/s, utilizes ultra-violet absorption spectrum to detect production concentration, calculates that to separate the factor be 0.0103.
Embodiment 4:
Characterize mixed performance by " Villermaux/Dushman " reaction system.In the experiment with H
2SO
4Solution is as the B fluid, NaOH, H
3BO
3, KI and KIO
3Solution as the A fluid.It is 0.2 micron micropore that the nitrogen of 0.2MPa is passed equivalent diameter with the flow velocity of 20m/s, joins the A fluid that flow velocity is 1m/s from vertical direction, disperses wherein with the form of micro-bubble.Afterwards under the effect of pressure reduction, it is that 200 microns micropore mixes with the A fluid that disperses bubble that the B fluid passes equivalent diameter with the flow velocity of 5m/s, utilizes ultra-violet absorption spectrum to detect production concentration, calculates that to separate the factor be 0.0011.
The inventive method is with H
2SO
4Solution is as the B fluid, with NaOH, H
3BO
3, KI and KIO
3Solution as the A fluid.But be not limited thereto the mixing of two kinds of fluids,, adopt method of the present invention, all can strengthen mixing, realize the rapid mixing of two fluids so long as need two fluids of mixing.
The above; only for the preferable specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (7)
1. the diffusing bubble of differential is strengthened the method for mixing, it is characterized in that: gas is passed through micropore, be distributed to the A fluid of bottom horizontal flow sheet from vertical direction, gas is cut into micro-bubble by cross-flow, flow with the A fluid, the B fluid by other micropore, is distributed to the A fluid that contains bubble from vertical direction more afterwards, realizes the mixing of A fluid and B fluid.
2. method according to claim 1 is characterized in that: described gas is insoluble to A fluid and B fluid.
3. method according to claim 1 is characterized in that: with H
2SO
4Solution is as the B fluid, with NaOH, H
3BO
3, KI and KIO
3Solution as the A fluid.
4. method according to claim 3 is characterized in that: the gas of employing is gases such as nitrogen, argon gas or helium.
5. method according to claim 1 is characterized in that: described micropore equivalent diameter is 0.2～1000 micron.
6. method according to claim 1 is characterized in that: the A flow rate of fluid is 0.1～5m/s, and gas is 1～20m/s by the speed of micropore, and the B fluid is 0.1～5m/s by the speed of micropore.
7. method according to claim 6 is characterized in that: described method comprises the steps:
1) the A fluid is flowed by flow velocity 0.1～5m/s;
2) gas is passed micropore with the flow velocity of 1～20m/s after, join the A fluid of bottom horizontal flow sheet from vertical direction, disperse wherein with the form of micro-bubble;
3) make the B fluid pass other micropore with the flow velocity of 0.1～5m/s after, join the above-mentioned A fluid that has disperseed bubble from vertical direction, realize the mixing of A fluid and B fluid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100635275A CN102160972A (en) | 2011-03-16 | 2011-03-16 | Method for strengthening mixing of micro-dispersion air bubbles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100635275A CN102160972A (en) | 2011-03-16 | 2011-03-16 | Method for strengthening mixing of micro-dispersion air bubbles |
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|---|---|
| CN102160972A true CN102160972A (en) | 2011-08-24 |
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| CN2011100635275A Pending CN102160972A (en) | 2011-03-16 | 2011-03-16 | Method for strengthening mixing of micro-dispersion air bubbles |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101798090A (en) * | 2010-04-07 | 2010-08-11 | 清华大学 | Method for preparing nanometer silicon dioxide |
| CN101811685A (en) * | 2010-04-07 | 2010-08-25 | 清华大学 | Method for preparing beta-calcium phosphate or hydroxyapatite nanoparticles |
-
2011
- 2011-03-16 CN CN2011100635275A patent/CN102160972A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101798090A (en) * | 2010-04-07 | 2010-08-11 | 清华大学 | Method for preparing nanometer silicon dioxide |
| CN101811685A (en) * | 2010-04-07 | 2010-08-25 | 清华大学 | Method for preparing beta-calcium phosphate or hydroxyapatite nanoparticles |
Non-Patent Citations (1)
| Title |
|---|
| A.GÜNTHER等: "Liquid mixing using inert gas and anintegrated gas-liquid separator", 《7TH INTERNATIONAL CONFERENCE ON MINIATURIZED CHEMICAL AND BIOCHEMICAL ANALYSIS SYSTEMS》 * |
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Application publication date: 20110824 |