CN101857289A - Clapboard type electric field ion separator - Google Patents

Clapboard type electric field ion separator Download PDF

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Publication number
CN101857289A
CN101857289A CN200910132070A CN200910132070A CN101857289A CN 101857289 A CN101857289 A CN 101857289A CN 200910132070 A CN200910132070 A CN 200910132070A CN 200910132070 A CN200910132070 A CN 200910132070A CN 101857289 A CN101857289 A CN 101857289A
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CN
China
Prior art keywords
water
hydroecium
flow
uniform flow
utmost point
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CN200910132070A
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Chinese (zh)
Inventor
孟海乐
孟美
孟田
郭蕾
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孟海乐
孟美
孟田
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Application filed by 孟海乐, 孟美, 孟田 filed Critical 孟海乐
Priority to CN200910132070A priority Critical patent/CN101857289A/en
Publication of CN101857289A publication Critical patent/CN101857289A/en
Pending legal-status Critical Current

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Abstract

The invention relates to a device for separating desalinated water by an electric field without films. Two symmetrical and uniform flow isolation boards (4) are arranged in solution, and water in an intermediate water chamber moves upwards at a laminar flow velocity. Ions in the water continuously enter a concentrated bucket (8) in the process of directional migration because of the action of electric field force, and irons in the concentrated bucket are accumulated and concentrated. Because level difference (ha in the figure) exists between both sides of the uniform flow isolation boards (4), pressure difference of all of final shrinkage holes on the uniform flow isolation boards is equivalent, and concentrated ion liquid in all of the final shrinkage holes (7) flows to a polar water chamber (19) with equal velocity to be discharged, thereby achieving the purpose of desalinating water.

Description

Clapboard type electric field ion separator
Technical field
The invention belongs to water conditioning equipment, i.e. water demineralizing (desalination) equipment.
Background technology
Utilize the water treating equipment of electric field desalination at present, " electrodialysis " [figure three] of introduction in the 182nd page of " electrochemical method application " that publishes and distributes as Chemical Industry Press, be: " under the DC electric field effect; the negative ions in the solution moves to different directions respectively; positive ion moves to negative pole, and negative ion moves to positive pole.If ion-exchange membrane is installed in the middle of solution, because cationic exchange membrane only allows positive ion to pass through, and anion-exchange membrane only allows negative ion to pass through, therefore can limit the migration of different zones effects of ion, finally reach separation, concentrate, purify, reclaim the purpose of ion or desalination water.Because have only the 2-3 mm distance between the anion and cation exchange membrane,, in practice, hundreds of is assembled into multicell to ion-exchange membrane in order to raise the efficiency.Because the ion-exchange membrane of installing in the middle of solution stops up membrane channel because of fouling easily.Not only need to clean, the membrane efficiency through repeatedly cleaning descends one by one, finally must more renew film.Troublesome poeration not only, and running cost has height.Also have this equipment uniprocessing, can not arbitrarily adjust the ratio of water outlet fresh water and dense water, the fresh water of output and the water yield of dense water respectively account for 50%, and fresh-water recovery rate is low, and not only efficient is not high, and wastes former water.
Goal of the invention
Purpose of the present invention is exactly at above-mentioned weak point, provides a kind of new, without film, the desalination water equipment that the ratio of dense water of water outlet and fresh water can arbitrarily be adjusted.
Summary of the invention
To achieve these goals, two symmetric uniform flow division boards [figure one .4] are housed and replace ion-exchange membrane in solution.The flow process of water is: former water from bottom entry water distributing pipe [figure one .1] after following twice water distribution of water dispensing board [figure one .2], reached enter in the middle of on hydroecium [the figure one .3] flow section evenly, and upwards flow with the flow velocity of laminar flow regime.And the water intermediate ion in the directional migration process because the effect of electrical forces constantly enters thickening cone [figure one .8].Amount of ions in the thickening cone increases gradually, reaches spissated purpose.Because of slanted floor under the thickening cone [figure one .8], the liquid mass after concentrating is bigger again, very easily downward-sloping flowing, and [figure one .7] flows to utmost point hydroecium [figure one .19] from the final minification hole.
And the water of middle hydroecium [figure one .3] is in flow process from bottom to top, and water intermediate ion concentration reduces gradually, and the water after the desalination flows out through water outlet water distributing pipe [figure one .6] from last water dispensing board [figure one .5].
In order to control the water yield that flows into utmost point hydroecium, final minification hole [figure one .7] diameter is very little, generally have only several millimeters, and from the area very big [figure one .8] of figure one .A-A sectional view thickening cone in middle hydroecium one side, [figure one .8] flows into thickening cone to the water of middle hydroecium from this plane, requires the flow section flow even, there is not the dead angle, so from figure one .I-I section, the shape of thickening cone is an isosceles triangle, and this leg-of-mutton height can not be too low.In order to prevent that middle flow velocity is greater than peripheral flow velocity on the thickening cone flow section, uniform flow card [figure one .10] is housed in the centre of thickening cone, and the shape of this uniform flow card also is an isosceles triangle, form similar triangles with the figure one .I-I section triangle of thickening cone, and reverse direction is installed [figure one .10].
For the flow that guarantees to enter the thickening cone flow section even, also can install uniform flow net [figure two .14] additional at the thickening cone inlet, the water that the pore size of this uniform flow net [figure two .14] not only will guarantee to flow in the thickening cone does not have resistance, also to guarantee the gas that produces in the thickening cone unobstructed be discharged in the middle of hydroecium.
She Ji uniform flow division board thickness is bigger like this, in order to reduce its thickness, in the middle of only keeping the part of hydroecium one side as thickening cone [figure two .8], and the partial design of the utmost point hydroecium one side mobile passage [figure two .11,13] that becomes to flow downward and make progress.From another direction [figure two .b-b sections], these two passages remain and the parallel folding isosceles triangle in base [figure two .16] [figure two .b-b sections].This design, uniform flow card will be installed in the seam of upper reaches [figure two .10].
The flow process of design water is like this, high ion concentration water in the thickening cone [figure two .8], flow downward from dirty seam [figure two .11] and to turn the curved of 180 degree through folded seam [figure two .12], upwards flow from upper reaches seam [figure two .13], [figure two .7] flow to utmost point hydroecium [figure two .19] at last from the final minification hole.
Certainly take this method treating water, must satisfy two conditions:
A condition is, the flow velocity of water will remain under the laminar flow regime in the middle hydroecium [figure one .3], because under laminar flow regime, fluid particle is done ruly wire motion, and not blending mutually each other can not influence the normal migration of water intermediate ion.
Another condition is the liquid level of the two poles of the earth hydroecium [figure one .19], the liquid level of hydroecium in the middle of must being lower than.[figure one] as shown in the figure intercepts horizontal plane from any two different heights respectively in the final minification hole, observe the liquid level of uniform flow division board both sides, on a horizontal plane, and h 1-h 1'=h a, on another horizontal plane, h 2-h 2'=h a, h aIt is the liquid level difference of uniform flow division board [figure one .4] both sides.Hence one can see that, uniform flow division board both sides, and the liquid level difference on each horizontal section of different heights all equates, because liquid level difference equates that pressure difference just equates.The pressure difference that is to say all the final minification Kong Chu both sides on the uniform flow division board all equates, because pressure difference equates that flow velocity just equates.Because final minification hole [figure one .7] size is identical, flow also equates.Thereby reach the purpose of uniform flow.
The liquid level of hydroecium in the middle of not changing, as long as the liquid level of utmost point hydroecium [figure one .19] is improved, the liquid level difference of uniform flow division board both sides just reduces, the utmost point water yield just reduces.The liquid level of utmost point hydroecium is reduced, and the liquid level difference of uniform flow division board both sides just increases, and the utmost point water yield is just added.As long as utmost point water rising pipe [figure one .15] is made adjustable, just can regulate the dense water of water outlet and the ratio of the fresh water water yield arbitrarily like this according to the water quality situation.
Specific embodiment
Describe first embodiment of the present invention in detail according to the calculations incorporated accompanying drawing below, middle hydroecium [figure one .3] flowing from bottom to top will keep laminar flow regime, is the orthogonal Reynolds number because do not find flow section.In practice, determine flow velocity with the ion isolation effect.In design, can adopt the lower critical Reynolds number of open channel (near rectangle) to calculate.Find the lower critical reynolds number Re of open channel=(vR)/γ ≈ 500 from petroleum industry press 2004.11 institution of higher education's teaching materials " engineering fluid mechanics ", R is the characteristic geometrical dimension of open channel flow section in the formula, claims hydraulic radius.The definition of hydraulic radius R is
R=A/X
In the formula: the area of A-flow section
The surperficial contacted circumference in X-flow section and border (as solid) claims wetted perimeter
The flow velocity of v-water, meter per second
Kinematic viscosity in the time of γ-t=10 ℃, γ=1.306 * 10 -6m 2/ s
To the small-sized processing water yield, general employing is vertical-flow, go out on advancing under the flow direction of vertical-flow middle hydroecium [figure one .3] water requires, because the water of hydroecium in the middle of beginning to enter, ionic concn is higher, quality is bigger, goes out can not take place can guarantee effluent quality because of convection current blending of poor quality on advancing under adopting.
Referring to figure one, the flow section size of middle hydroecium is made as, and long 0.45 meter, wide 0.2 meter, according to formula: R=A/X,
Hydraulic radius R is:
R=(0.45×0.2)/[(0.45+0.2)×2]=0.0692307
According to formula: Re=(vR)/γ=500, middle hydroecium keeps the flow velocity v of laminar flow regime to be:
v=(500×γ)/R=(500×1.306×10 -6)/(6.92307×10 -2)≈9.4×10 -3m/s
Handling water yield Q is exactly:
Q=Av=9×10 -2×9.4×10 -3=8.46×10 -4m 3/s
Utmost point water water yield Q The utmost pointGet and handle 1/5th of the water yield
Q The utmost point=8.46 * 10 -4* 0.2=1.692 * 10 -4m 3/ s
The final minification bore dia calculates:
For the ease of calculating final minification orifice flow speed v 1Value 1 meter per second
The liquid level difference h of middle hydroecium and utmost point hydroecium aBe:
h a=(v 1 2)/(2g)=1 2/ (2 * 9.8)=0.051 (rice) (g is a universal gravity constant)
Final minification hole summation on two uniform flow division boards is 36
(D 2/ 4) ∏ * 1 * 36=Q The utmost point
In the formula:
(D 2/ 4) ∏-final minification hole area (∏ is a pi)
1-final minification orifice flow speed
The summation in final minification hole on two uniform flow division boards of 36-
Q The utmost pointThe water displacement of-two utmost point hydroeciums
The final minification bore dia is:
D=[(Q The utmost point* 4)/(∏ * 36)] 1/2=[(1.692 * 10 -4* 4)/(3.14 * 36)] 1/2≈ 2.5 * 10 -3(rice)
Referring to figure one, former water is from bottom entry water distributing pipe [figure one .1] hydroecium [figure one .3] in the middle of following water dispensing board [figure one .2] enters, and the flow velocity of laminar flow regime is 9.4 * 10 -3M/s.There is not thickening cone on the uniform flow division board [figure one .4] of the both sides, lower section [figure one .3] of middle hydroecium, the water intermediate ion is done directional migration, positive ion is close to the uniform flow division board of negative pole [figure one a .17] side, and negative ion is close to the uniform flow division board of anodal [figure one .18] side.Hydroecium [figure one .3] middle part in the middle of waterborne being raised to, near the water of uniform flow division board [figure one .4], ionic concn is high, has possessed the condition that enters thickening cone [figure one .8] in a large number rapidly.On middle hydroecium middle part and top, negative ions moves in 36 (each uniform flow division board has 18 thickening cones) thickening cones [figure one .8] on two uniform flow division boards [figure one .4] of the two poles of the earth [figure one .17.18] direction respectively in the water, and concentrates.[figure one .7] (each thickening cone has 1 final minification hole) flows to two utmost point hydroeciums [figure one .19] (flow direction of utmost point water in utmost point hydroecium represented to flow downward with downward arrow) to high ion concentration water after concentrating from 36 final minification holes with equal flow velocity (design current velocity 1m/s), again from utmost point water water distributing pipe [figure one .9] through utmost point water tube hose [figure one .20], discharge from height adjustable utmost point water rising pipe [figure one .15] at last.
And the water dispensing board [figure one .5] that is raised to waterborne of middle hydroecium, water intermediate ion concentration is very low, has reached the purpose of desalination.Water after the desalination flows out from fresh water water distributing pipe [figure one .6] through last water dispensing board [figure one .5].
Second enforcement is: referring to figure two, in large and medium-sized processing, equipment volume is big, and in order to reduce device height, water adopts flat flow at middle hydroecium [figure two .3].The flow process of water is: former water in inlet chamber [figure two .21], enters middle hydroecium [figure two .3] from water inlet water dispensing board [figure two .2] from entry water distributing pipe [figure two .1] again, and water is represented with hollow arrow in the flow direction of middle hydroecium, is parallel.And arriving freshwater room [figure two .22] through middle hydroecium [figure two .3] from water outlet water dispensing board [figure two .5] with the flow velocity of laminar flow regime, fresh water flows out from water outlet water distributing pipe [figure two .6].The centre-height of water outlet water distributing pipe [figure two .6] is exactly the elevation of water surface of middle hydroecium [figure two .3], so require the water outlet water distributing pipe not have resistance.
Water is in the flow process of middle hydroecium, and positive and negative ion to both sides directional migration [figure two .B-B sections], can be seen in the D enlarged view respectively in the water, and the direction of arrow is exactly the mobile direction of ion migration direction and utmost point water.That is: after ion concentrates in thickening cone [figure two .8], the utmost point water that concentration is high flows downward through dirty seam [figure two .11], through folded seam [figure two .12] split flow, and after upper reaches seam [figure two .13] is upwards mobile, [figure two .7] flow to utmost point hydroecium [figure two .19] from the final minification hole again, water in the utmost point hydroecium flows downward (identical with the direction of arrow), after utmost point water water distributing pipe [figure two .9] through utmost point water tube hose [figure two .20], is discharged from height-adjustable utmost point water rising pipe [figure two .15].Equally, the centre-height of utmost point water rising pipe is exactly a utmost point water elevation of water surface.So utmost point water water distributing pipe [figure two .9], utmost point water tube hose [figure two .20] and utmost point water rising pipe [figure two .15] all can not have resistance.Regulate utmost point water rising pipe height according to the water quality situation, can regulate the utmost point water water yield.
Certainly two uniform flow division boards [4] directly are used as electrode usefulness, it is the amount that produces gas in the thickening cone [8] in order to reduce that employing adds electrode [17,18] in addition.
Its method of calculation are identical with first embodiment.
The invention effect
Because the aperture of the aperture of final minification hole on the uniform flow division board [figure one .7] on the prior art intermediate ion exchange membrane be not so exist blockage problem. Because utilize same liquid level difference, flow equates on the final minification hole again. And the water intermediate ion to enter the area of thickening cone [figure one .8] big because the effect of electric field force, the amount of ions that enters thickening cone is just many. And the aperture of final minification hole [figure one .7] is little, and the water yield that flows out from thickening cone is few. The water intermediate ion just concentrates in thickening cone, so reach the purpose that dense water separates with fresh water. Can adjust because of the liquid level difference of uniform flow division board both sides again, so the ratio of dense water and fresh water just can be regulated arbitrarily.
Description of drawings
Comprise in the accompanying drawing 1 that front view, A-A analyse and observe and three figure of I-I section (with utmost point water axially tiltedly cuing open at the thickening cone streamline).The water of hydroecium upwards flowed in the middle of front view hollow core arrow was represented, arrow is represented ion migration direction and utmost point current direction.
Second embodiment of the main explanation of accompanying drawing 2, comprise front view, B to analyse and observe, C to analyse and observe, D enlarged view and five figure of b-b section.Identical among the figure among the represented content of arrow and the figure one.D enlarged view and b-b sectional view are in order to see the another kind of method of design of uniform flow division board clearly.Dotted line is represented the interlayer content, and gauging line also dots.The uniform flow net only has in the D enlarged view, and not drawing in B-B analyses and observe is the simplification of analysing and observe for B-B.
Fig. 3 is the synoptic diagram of prior art, duplicates the 182nd page of " the electrochemical method application " of publishing from Chemical Industry Press in 2003.

Claims (4)

1. a desalination water equipment comprises uniform flow division board [4], thickening cone [8], final minification hole [7], middle hydroecium [3] and utmost point hydroecium [19].The flow velocity that it is characterized in that last all the final minification holes [7] of said uniform flow division board [4] all equates, is because there is liquid level difference [h uniform flow division board both sides a].
2. according to claims 1 said thickening cone [8], it is characterized in that ion concentrates, and reaches and the isolating purpose of fresh water in thickening cone.
3. according to claims 1 said middle hydroecium [3], it is characterized in that water is laminar flow regime at middle hydroecium.
4. according to claims 1 said uniform flow division board [4], it is characterized in that its material character is corrosion resistant electrical conductor.
CN200910132070A 2009-04-11 2009-04-11 Clapboard type electric field ion separator Pending CN101857289A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN200910132070A CN101857289A (en) 2009-04-11 2009-04-11 Clapboard type electric field ion separator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN200910132070A CN101857289A (en) 2009-04-11 2009-04-11 Clapboard type electric field ion separator

Publications (1)

Publication Number Publication Date
CN101857289A true CN101857289A (en) 2010-10-13

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ID=42943489

Family Applications (1)

Application Number Title Priority Date Filing Date
CN200910132070A Pending CN101857289A (en) 2009-04-11 2009-04-11 Clapboard type electric field ion separator

Country Status (1)

Country Link
CN (1) CN101857289A (en)

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Application publication date: 20101013