CN105688675A - In-line membrane stack utilizing columnar dielectrophoresis electrodes - Google Patents
In-line membrane stack utilizing columnar dielectrophoresis electrodes Download PDFInfo
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- CN105688675A CN105688675A CN201610170212.3A CN201610170212A CN105688675A CN 105688675 A CN105688675 A CN 105688675A CN 201610170212 A CN201610170212 A CN 201610170212A CN 105688675 A CN105688675 A CN 105688675A
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- 239000012528 membrane Substances 0.000 title claims abstract description 97
- 238000004720 dielectrophoresis Methods 0.000 title claims abstract description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 184
- 238000003825 pressing Methods 0.000 claims abstract description 23
- 230000005684 electric field Effects 0.000 claims abstract description 22
- 238000009826 distribution Methods 0.000 claims description 20
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- 239000002184 metal Substances 0.000 claims description 3
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- 239000012530 fluid Substances 0.000 abstract description 10
- 239000003344 environmental pollutant Substances 0.000 abstract description 9
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- 102000010637 Aquaporins Human genes 0.000 description 2
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/42—Electrodialysis; Electro-osmosis ; Electro-ultrafiltration; Membrane capacitive deionization
- B01D61/427—Electro-osmosis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/42—Electrodialysis; Electro-osmosis ; Electro-ultrafiltration; Membrane capacitive deionization
- B01D61/422—Electrodialysis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/469—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
- C02F1/4693—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis electrodialysis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/469—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
- C02F1/4698—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis electro-osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/46—Apparatus for electrochemical processes
Abstract
The invention relates to an in-line membrane stack utilizing columnar dielectrophoresis electrodes. The in-line membrane stack mainly comprises a front end face pressing plate, a circulating water circuit plate, a rear end face pressing plate and in-line membrane plates, wherein each in-line membrane plate is composed of an outer frame, an inner columnar electrode component and filter membranes at two sides; the front end face pressing plate is provided with a raw water inlet, a concentrated water outlet and a produced water outlet; a water production cavity is formed between the filter membranes at two sides of each in-line membrane plate; each water production cavity is communicated with the produced water outlet; an area ratio of the raw water inlet to a raw water main runner is smaller than 1:2; bulged surfaces with columnar bulges of two electrode plates of each columnar electrode component are oppositely buckled, and are connected with a high-frequency alternating current power supply; an acting surface used for outwards emitting a non-uniform electric field is formed on the non-bulged surface of each electrode plate of each columnar electrode component. The in-line membrane stack disclosed by the invention has the advantages that an inner circulating water circuit is arranged for accelerating fluid which passes through a membrane surface, and a pollutant is carried into a concentrated water channel in coordination with a dielectrophoresis effect produced by the columnar electrode components under the condition that the fluid is at a certain speed, so that the self-purification of the membrane is realized.
Description
Technical field
The present invention relates to a kind of equipment in the mixture granule of special object being easily separated and being settled, particularly to a kind of in-line arrangement membrane stack using column dielectrophoresis electrode。
Background technology
Permeable membrane isolation technics in nearly 30 years owing to it is easy to operate, process equipment is compact, separation efficiency is high, low power consumption and other advantages and develop the important process method that becomes solid-liquid separation in industry rapidly。But, in osmosis membrane filters technique, this inevitable problem of fouling membrane exists all the time, and has become this technique fatal defects in practical application。Fouling membrane be due in film surface and fenestra due to the deposition of microgranule, colloidal particle, solute molecule or antibacterial, virus etc. or the Pore Blocking multiplying and cause or diminish, caused the increase of membrane resistance, so that film transit dose declines, reduce the consequence such as service life of film。Such as, Flat Membrane commonly used in solid-liquid separation, its film transit dose can reduce about 50% due to fouling membrane after the work of nearly one hour；And due to the absorption of solid granule and blocking。
The industrial method cleaning fouling membrane that is often used in is broadly divided into physical cleaning and Chemical cleaning, and Chemical cleaning is by making with medicament to be dissolved by insoluble pollutant and to flush out membrane module。But, Chemical cleaning is not only due to the use of medicament and increases the running cost of filtering technique, and film is caused damage due to the use of acid or basic agent and pollutes。Physical cleaning mainly includes the methods such as the cleaning of low pressure high flow rate, isobaric flushing, backwash, negative pressure cleaning, mechanical curettage, and what commonly use in industry is high speed backwash and air-water backwashing technique。But, above two technique all must in cleaning process stopper film filtering technique, and need high pressure and higher than the water of aquifer yield two to three times for rinsing, power consumption height, water consumption is big。
Summary of the invention
It is an object of the invention to be in that to overcome the deficiencies in the prior art, there is provided one by arranging inner loop water route inside in-line arrangement membrane stack, formation circulates, thus the fluid through face is accelerated, coordinate the film produced dielectrophoresis effect for pollutant being pushed away face of the internal columnar electrode assembly arranged, when fluid possesses certain speed, pollutant are brought dense aquaporin into, to reach the in-line arrangement membrane stack of the use column dielectrophoresis electrode of the auto purification of film。
This invention address that its technical problem is achieved through the following technical solutions:
A kind of in-line arrangement membrane stack using column dielectrophoresis electrode, it is characterised in that: it includes front end face pressing plate, circulation waterway plate, in-line arrangement lamina membranacea and rear end face pressing plate；Press-fiting one group of in-line arrangement lamina membranacea between described front end face pressing plate and rear end face pressing plate side by side, the former water through hole of each described in-line arrangement lamina membranacea is collectively forming former water sprue, and the dense water through hole of described each in-line arrangement lamina membranacea is collectively forming dense water sprue；Arranging circulation waterway in described circulation waterway plate, described circulation waterway connects the entrance of former water sprue and the outlet of dense water sprue；Former water inlet in described circulation waterway side and the area ratio of former water sprue at opposite side are less than 1:2；Described in-line arrangement lamina membranacea includes housing, columnar electrode assembly and filter membrane, and described filter membrane is arranged on the both sides of housing, and described columnar electrode assembly is arranged between two filter membranes；Described columnar electrode assembly includes the first battery lead plate and the second battery lead plate, divides equally cloth and be provided with columnar protrusions and position, hole on the first battery lead plate, the second battery lead plate, the columnar protrusions of the first battery lead plate and the position, hole of Kong Weiyu the second battery lead plate and columnar protrusions locations complementary；After the raised face (RF) with columnar protrusions of the first battery lead plate and the second battery lead plate fastens relatively, wherein the columnar protrusions of a battery lead plate is embedded within the position, hole of another battery lead plate；First battery lead plate and the second battery lead plate connect the different outfans of high-frequency ac power respectively, form the acting surface to the non-equal electric field of emission on the non-protruding face of the first battery lead plate and the second battery lead plate；Described housing is provided with the product water out producing water cavity between connection two filter membranes。
Described former water inlet is multiple entry structure, and the area ratio of the area sum of each entrance and described former water sprue is less than 1:2。
Described area ratio is 1:10。
The connected mode of described former water inlet and former water sprue is the center that former water inlet is plugged on former water sprue。
The first described battery lead plate and the surface of the second battery lead plate have insulating barrier。
After described the first battery lead plate, the raised face (RF) of the second battery lead plate fasten relatively, wherein the top of the columnar protrusions that a battery lead plate is made flushes with the non-protruding face of another battery lead plate。
Described the first battery lead plate, the second battery lead plate adopt sheet metal or slice stamping molding, and on it, the columnar protrusions of molding and position, hole form interlaced array distribution。
Described interlaced array distribution mode is: the odd positions of the line n of the first battery lead plate and the even bit of the (n+1)th row are set to columnar protrusions, and the even number position of line n and the odd positions of the (n+1)th row are position, hole；The columnar protrusions of the second battery lead plate is then corresponding with the position, hole of the first battery lead plate and columnar protrusions position with position, hole。
Described interlaced array distribution mode is: the line n of the first battery lead plate is columnar protrusions or position, hole, and the (n+1)th row is position, hole or columnar protrusions；The columnar protrusions of the second battery lead plate is then corresponding with the position, hole of the first battery lead plate and columnar protrusions position with position, hole。
Described the first battery lead plate, the thickness of slab of the second battery lead plate are identical；Cross-sectional diameter≤the 2.5mm of described columnar protrusions；Described columnar protrusions and Kong Weiwei matched in clearance, fit clearance is not more than monolateral 0.2mm。
The first described battery lead plate and the second battery lead plate are corrugated plating。
Advantages of the present invention and having the beneficial effect that
1, the present invention uses the in-line arrangement membrane stack of column dielectrophoresis electrode, between the entrance and the outlet of dense water sprue of former water sprue, circulation waterway is set, do not need to arrange extra pressurizer, only rely on the structure of self, by the area ratio of former water inlet and former water sprue less than 1:2, a part of concentrate recirculation of dense water sprue can be compensated the flow of former water sprue, improve the flow velocity of dense water sprue, thus increasing the rate of flow of fluid through film surface, and ensure that aquifer yield is constant。When multiple in-line arrangement membrane stacks parallel water distribution time, pipeline linear loss difference cause there is pressure differential between different heap so that water distribution is not completely uniform。Relative to the heap in upright arrangement not increasing circulation waterway, owing to circulation waterway makes former water inlet reduce, thus it is more uniform to have water distribution between the heap between the heap in upright arrangement of circulation waterway, and water velocity and the pressure within array is piled increases, make water distribution between the plate between the lamina membranacea each in upright arrangement within heap in upright arrangement also more uniform。
2, the present invention uses the in-line arrangement membrane stack of column dielectrophoresis electrode, in-line arrangement lamina membranacea includes housing, columnar electrode assembly and filter membrane, columnar electrode assembly the columnar protrusions of Different electrodes plate and position, hole cooperate, collectively form a working cell body launching non-equal electric field, under high frequency alternating current effect, the surface deep camber at body place, working cell makes the density of surface charge of body region, working cell increase, and the uneven field intensity of its region strengthens therewith；The working cell body that columnar protrusions collectively forms as the position, hole launching end points and through electrode plate is open to external structure, the non-equal electric field launched both passes through battery lead plate and arrives outside surface, rather than electric field is enclosed between two battery lead plates, can not effectively play the dielectrophoresis effect of non-equal electric field, cause waste。Meanwhile, for the surface launching of traditional dielectric iontophoretic electrode, columnar protrusions can taper off to a point launch point, and the dielectrophoresis force in the electric field formed outside acting surface is higher。
3, the present invention uses the in-line arrangement membrane stack of column dielectrophoresis electrode, in-line arrangement lamina membranacea includes housing, columnar electrode assembly and filter membrane, columnar electrode assembly produces the dielectrophoresis effect of different non-equal electric fields under the alternating current of different frequency and different voltage, respective frequencies is selected according to characteristics of liquids to be dealt with, the corresponding dielectric power that the alternating current power supply of voltage produces makes the microgranule in liquid, make under dielectrophoresis effect in inhomogeneous field those can pass through filter membrane consider hole molecules polarization the company of being agglomerated into, increase its volume, and move to the direction that electric field intensity weakens, make these materials that need to process and filter the clear distance that mould surface keeps certain, thus strengthening the filter capacity of filter membrane, and realize weakening the concentration polarization effect even preventing filter membrane, reduce the blocking of film surface scale, extend the service life of filter membrane。Meanwhile, the electroosmotic effect that dielectrophoresis has makes hydrone produce the orientation mobile phenomenon through film, and the son that moisturizes is by efficiency, thus improving the processing speed to handled material。
4. the present invention uses the in-line arrangement membrane stack of column dielectrophoresis electrode, by arranging inner loop waterway structure inside in-line arrangement membrane stack, formation circulates, thus the fluid through face is accelerated, coordinate the film produced unshapeliness electric field for pollutant being pushed away face of the internal columnar electrode assembly arranged, when fluid possesses certain speed, pollutant are brought dense aquaporin into, to reach the auto purification of film。
Accompanying drawing explanation
Fig. 1 is the water flow inside schematic diagram of the in-line arrangement membrane module of prior art；
Fig. 2 is the operation principle schematic diagram of the in-line arrangement membrane module of prior art；
Fig. 3 is the structural representation of the in-line arrangement membrane stack of the embodiment of the present invention 1；
Fig. 4 is that the A-A of Fig. 3 is to cross-sectional view；
Fig. 5 is in-line arrangement lamina membranacea structural representation (partly cut-away) of embodiments of the invention 1；
Fig. 6 is the in-line arrangement lamina membranacea structural representation of embodiments of the invention 1；
Fig. 7 is the in-line arrangement membrane stack water flow inside circulation schematic diagram of the embodiment of the present invention 1；
Fig. 8 is the in-line arrangement membrane stack operation principle schematic diagram of the embodiment of the present invention 1；
Fig. 9 is the preferred structure schematic diagram of the circulation waterway of the in-line arrangement membrane stack of the embodiment of the present invention 1；
Figure 10 be two electrode plate of the columnar electrode assembly of the present invention combination before relative position schematic diagram；
Figure 11 be two electrode plate of the columnar electrode assembly of the present invention combination before relative position perspective view；
Figure 12 is the section of structure of the single-piece electrode plate of the columnar electrode assembly of the present invention；
Figure 13 is the perspective view of the single-piece electrode plate of the columnar electrode assembly of the present invention；
Figure 14 be two electrode plate of the columnar electrode assembly of the present invention combination after sectional view；
Figure 15 be two electrode plate of the columnar electrode assembly of the present invention combination after relative position perspective view；
Figure 16 is the columnar electrode assembly of present invention particle distribution schematic diagram before energising；
Figure 17 is the columnar electrode assembly particle distribution schematic diagram after powered up of the present invention；
Figure 18 is the electric field intensity contour of the uneven electric field that the columnar electrode assembly of the present invention produces after powered up。
Description of reference numerals
Prior art accompanying drawing labelling:
The former water inlet of 1-, the dense water out of 2-, 3-product water out, 4-water stream channel, 5-filter membrane, 6-electrode, 7-produce water cavity, 8-former water sprue, the dense water sprue of 9-。
Accompanying drawing labelling of the present invention:
10-front end face pressing plate, 11-rear end face pressing plate, 12-in-line arrangement lamina membranacea, the former water inlet of 13-, the dense water out of 14-, 15-produces water out, 16-attaching plug, 17-circulation waterway plate, the former water sprue of 18-, 19-columnar electrode assembly, the dense water sprue of 20-, 21-housing, 22-produces water cavity, the dense hydrospace of 23-, 24-filter membrane, the dense water through hole of 25-, the former water through hole of 26-, 27-produces water branch flow passage, 28-produces water through hole, the difference of 29-bore, 30-flow-guiding cloth, 31-circulation waterway, 32-the first battery lead plate, 33-the second battery lead plate, 34-columnar protrusions, position, 35-hole, 36-acting surface。
Detailed description of the invention
Below by specific embodiment, the invention will be further described, and following example are illustrative, is not determinate, it is impossible to limit protection scope of the present invention with this。
As it is shown on figure 3, the in-line arrangement membrane stack of the use column dielectrophoresis electrode of the present invention, mainly it is made up of front end face pressing plate 10, circulation waterway plate 17 rear end face pressing plate 11, in-line arrangement lamina membranacea 12, rear end face pressing plate 11 and columnar electrode assembly。Between front end face pressing plate 10 and rear end face pressing plate 11, press-fit one group of in-line arrangement lamina membranacea 12 side by side and form sealing cavity。Front end face pressing plate 10, rear end face pressing plate 11, in-line arrangement lamina membranacea 12 closed assembly successively also adopt pull bar to be fixed together。Front end face pressing plate is shaped with former water inlet 13, dense water out 14, produces water out 15 and attaching plug 16。Circulation waterway version 17 is built-in with circulation waterway 43。
As shown in Figure 4, in-line arrangement lamina membranacea 12 is made up of housing 21, columnar electrode assembly 199 and double-side filtering film 24, is formed and produce water cavity 22 between in-line arrangement lamina membranacea 12 double-side filtering film 24, produces water cavity 22 and connects with producing water out 15。When each in-line arrangement lamina membranacea 12 is fitted in together, form the former water sprue 18 connected with former water inlet 13 in bottom, form the dense water sprue 20 connected with dense water out 14 on top。When being superimposed before and after multiple in-line arrangement lamina membranaceas 12, between each jamb surface of the framework housing 21 of the in-line arrangement lamina membranacea 12 that front and back are adjacent, fit tightly sealing, between the filter membrane 24 of adjacent straight column lamina membranacea 12, form dense hydrospace 23。
As shown in Figure 5,6, in the present embodiment, housing 21 is rectangle frame, and two panels filter membrane 24 is covered in the frame both sides of housing respectively。The top frame of housing, bottom frame, side edge frame are respectively perpendicular to housing plane arrange dense water through hole 25, former water through hole 26 and produce water through hole 28, produce the horizontal frame connection of water branch flow passage 27 and produce water through hole 28 and produce water cavity 22。
The gap that can connect dense hydrospace 23 is left, with the top of former water through hole 26, in the bottom of dense water through hole 25。Dense water through hole 25 is superimposed as dense water sprue 20, produces water through hole 28 superposition and constitutes product water sprue, and former water through hole 26 is superimposed as former water sprue 18。When former water flows into from former water sprue 18, in the dense hydrospace 23 of entrance, the gap of former water through hole 26, in product water cavity 22, the product water after filter membrane 24 filters is collected in product water sprue passes through product water out 15 discharges via producing water branch flow passage 27。Stay to collect in after the dense water in dense hydrospace 23 overflows from the gap of dense water through hole 25 in dense water sprue 20 and discharged by dense water out 14。
Filter membrane 24 is in use frequently with the mode of cross flow filter, the present invention is in order to cut down concentration polarization, prevent a large amount of pollutant in surface from piling up and alleviate fouling membrane, between front end face pressing plate 10 and the dense water sprue 20 of in-line arrangement lamina membranacea 12 former water sprue 18, circulation waterway plate 17 is set, circulation waterway 43 therein is by the outlet of the entrance of former water sprue 18 Yu dense water sprue 20, to increase the surface velocity of filter membrane 24。In general, surface velocity is too low cannot wash away the pollutant being deposited in filter membrane 24 surface；The too high then energy consumption of surface velocity is big, less economical, is likely to the damage that can bring filter membrane 24 simultaneously, so surface velocity is controlled within the specific limits。After increasing circulation waterway 43, the inlet flow rate of former water sprue 18 and the exit velocity difference of dense water sprue 20 are relatively smaller, it is easier to controlled by the surface velocity of filter membrane 24 in the scope needed。
As shown in Figure 1 and Figure 2, in prior art, front end face pressing plate arranges dense water out 2, produces water out 3, former water inlet 1 and power connection。Its former water enters inside membrane module by former water inlet 1, enter the water stream channel 4 on every in-line arrangement lamina membranacea respectively and be distributed to filter membrane 5 surface of in-line arrangement lamina membranacea, under the effect of pressure and the dielectrophoresis force of electrode 6 generation, produce water and enter product water cavity 7 through filter membrane 5, finally flowed out membrane module by product water out 3, waste water after concentration, along film Surface runoff, is collected runner through current and is entered dense water out 2, flow out membrane module through dense water out。
It is identical for connecting that the outlet of the entrance of the former water sprue 8 of former water inlet 1 and water stream channel 4 and dense water sprue 9 amasss at the cross section of fluid channel of film working portion, if producing water ratio improves, then the flowing velocity of the outlet of dense water sprue 9 will decline。As shown in Figure 3, when under the entrance of former water sprue 8 and the discharge area same case of dense water sprue 9, former water sprue 8 enters water 1m/s, producing water ratio 95%, then the exit velocity of dense water sprue 9 is 1 × (100%-95%)=0.05m/s, the entrance of former water sprue 8 and the exit velocity of dense water sprue 9 ratio is for 20:1, and namely both current differences are from 20 times。If it is desired to improve the outlet lowest speed of dense water sprue 9 to 0.5m/s so that pollutant are not deposited on inside, and former water sprue 8 is limited owing to producing water can not increase by operating pressure, and such producing water ratio has reformed into 65%, and the response rate is subjected to affect。
Based on above-mentioned viewpoint, the in-line arrangement membrane stack of the use column dielectrophoresis electrode of the present invention, circulation waterway 43 is set between the entrance and the outlet of dense water sprue 20 of former water sprue 18, makes part concentrated stream be back to the entrance side of former water sprue 18, then the problems referred to above can be effectively improved。
As shown in Figure 7, circulation is added when the dense water of control total 50% flows back to former water sprue 18 from circulation waterway 43, then the flow velocity in former water sprue 18 becomes 1 × (100%+50%)=1.5m/s, relatively add 0.5 times without loop condition, the exit velocity of dense water sprue 22 becomes 1 × (50%+5%)=0.55m/s, relatively adds 10 times without loop condition。Then the velocity ratio between entrance and the outlet of dense water sprue 20 of former water sprue 18 is 1.5:0.55=30:11 ≈ 3:1, and both current differences are reduced to 3 times from by 20 times, if improving the flow of circulation, can reduce its gap again。So owing to the effect of inner loop makes film Surface runoff speed be effectively increased, not only flowing velocity can be increased but also can ensure that producing water ratio is constant。
When multiple in-line arrangement membrane stacks parallel water distribution time, owing to the linear loss of the in-line arrangement membrane stack of diverse location is different, making there is dynamic pressure difference between different in-line arrangement membrane stacks, thus the flow between each in-line arrangement membrane stack is also different, so overall water distribution is also uneven。And in-line arrangement membrane stack with circulation waterway 43 is less than the general former water inlet of in-line arrangement membrane stack, thus water distribution is evenly, and we carry out hypothesis below:
A) having identical two in-line arrangement membrane stack A and B parallel running, be state I when two heaps are for ordinary straight column membrane stack, it is state I I that two heaps all adopt during circulation waterway 43；
B) A under I, II state is kept to pile flow constant, i.e. QAI=QAII。
It is believed that under above-mentioned hypothesis, the dynamic pressure difference P of two heaps that system is broughtA-PB=Δ P does not change, and considers for simplifying, and selects perfect fluid model, adopts the dynamic pressure formula in Bernoulli equationCalculate with flow formula Q=S υ。Wherein, P is dynamic pressure, and ρ is fluid density, and Q is flow, and υ is flow velocity, and the entrance section that S is former water sprue 8 amasss。Then there is following derivation:
QAI=QAII=SAIυAI=S υ
The dynamic pressure of in-line arrangement membrane stack B: PBI=PAI+ Δ P=P+ Δ P
Former water sprue Entry Interface area under state I is n times of state I I, then have: SAI=SBI=nSAII=nSBII=S
Then between in-line arrangement membrane stack A and B of state I and state I I, the ratio of difference in flow is:
As can be seen here, the difference in flow then water distribution between two in-line arrangement membrane stacks is evenly。
In order to additionally arrange the energy consumption equipment such as pressure flow hybrid control valve in the exit of dense water sprue 20, also being able to realization makes the dense water of part enter addition circulation in circulation waterway 43, the radius ratio of former water inlet 13 with former water sprue 18 is set to less than 1:2 by the present embodiment, and preferred 1:10。The connected mode of former water inlet 13 and former water sprue 18 includes:
1) as shown in Figure 8, being extended outward by former water sprue 18, between former water inlet 13 with former water sprue 18, differing from of bore 29 makes up by being connected circulation waterway 43, forms nature transition at connecting portion；
2) as it is shown in figure 9, former water inlet 13 is plugged on the center of former water sprue 18, the part between former water inlet 13 with former water sprue 18 is connected by annulus end face seal, makes current not destroy original recurrent state；Above-mentioned setting can ensure that under the premise that additional energy does not occur, it is achieved water route self-loopa, reduces equipment operating cost；
3) former water inlet 13 may be configured as multiple entry structure, and the area sum of each entrance is constant with the area ratio of former water sprue 18, and the hydraulic losses making the former water inlet of entrance 13 is less。
In the present embodiment, between filter membrane 24, it is perpendicular to water (flow) direction electrode group is set。Electrode group is columnar electrode assembly 30, between filter membrane 24 and columnar electrode assembly 30, also can arrange flow-guiding cloth 31。
Such as Figure 10, shown in 11, columnar electrode assembly 199 includes first battery lead plate the 32, second battery lead plate 33, first battery lead plate 32 and the second battery lead plate 33 are laminated structure, it is respectively provided with columnar protrusions 34 and position, hole 35, the geomery of the columnar protrusions 34 being positioned on a battery lead plate matches with the geomery of the position, hole 35 being positioned on another battery lead plate, the height of columnar protrusions 34 and the consistency of thickness of battery lead plate。First battery lead plate 32 and the second battery lead plate 33 outer surface have insulating barrier, and the locations complementary of the columnar protrusions 34 of the first battery lead plate 32 and the position, hole 35 of the second battery lead plate 33, vice versa。
As shown in Figure 14, Figure 15, during installation, the raised face (RF) of first battery lead plate the 32, second battery lead plate 33 fastens relatively, the columnar protrusions 34 making the first battery lead plate 32 inserts within the position, hole 35 of the second battery lead plate 33, the columnar protrusions 34 of the second battery lead plate 33 inserts within the position, hole 35 of the first battery lead plate 32, and the columnar protrusions 34 of two plates coordinates with position, hole 35 for concentric fit。Columnar protrusions 34 top of the first battery lead plate 32 and the non-protruding face flush with outer surface of the second electrode 2, columnar protrusions 34 top of the second battery lead plate 33 and the non-protruding face flush with outer surface of the first electrode 1。
First battery lead plate 32 and the second battery lead plate 33 connect the different outfans of high-frequency ac power respectively, during energising, form a working cell body launching non-equal electric field around columnar protrusions 34。Then dielectrophoresis electrode structure has the acting surface 36 of two distribution working cell bodies。Liquid endoparticle self-characteristic according to required process, the cross-sectional diameter of the working cell that modifiable columnar protrusions 34 and position, hole 35 form, and the distance between working cell, skewness electric field on two acting surfaces 36 of dielectrophoresis electrode structure, it is achieved the efficient operation on whole purification, separation, enriching service face of target particles is processed。
First battery lead plate, the second battery lead plate thickness of slab identical；Cross-sectional diameter≤the 2.5mm of columnar protrusions；Columnar protrusions and Kong Weiwei matched in clearance, fit clearance is not more than monolateral 0.2mm。
As shown in Figure 12 and Figure 13, for the first battery lead plate 32, the first battery lead plate 32 passes through a sheet metal or slice stamping molding, columnar protrusions 34 thereon and position, hole 35 in interlaced distribution array。Its distribution mode includes:
1) odd positions of line n and the even bit of the (n+1)th row are set to columnar protrusions 34, and the even number position of line n and the odd positions of the (n+1)th row are position, hole 35。Make 4 positions that columnar protrusions 34 is adjacent are position, hole 35 different with it, otherwise adjacent 4 positions, position, hole 35 are columnar protrusions 34 different with it。When energized, forming direction-free equally distributed non-equal electric field on the face of dielectrophoresis electrode structure, namely entirety is uniformly distributed, but is non-equal electric field around columnar protrusions 34。
2) line n is position, columnar protrusions 34/ hole 35, and the (n+1)th row is position, hole 35/ columnar protrusions 34。When energized, the face of dielectrophoresis electrode structure is formed the non-equal electric field of the working cell body distribution cooperatively formed along columnar protrusions 34 and position, hole 35。
Its first battery lead plate and the second battery lead plate are continuous print corrugated plating, and mutually fasten。
As exemplified in figs, dielectrophoresis electrode structure, first battery lead plate the 32, second battery lead plate 33 connects the different outfans of high-frequency ac power respectively, and alternating current phases differs 180 °。When connecting alternating current power supply, the working cell body collectively formed by the columnar protrusions 34 and position, hole 35 that lay respectively at the first battery lead plate 32 and the second battery lead plate 33 is to the non-equal electric field of emission, when the frequency difference of alternating current power supply input, acting surface 36 produces positive dielectrophoresis effect or negative dielectrophoresis effect。As shown in figure 11, first battery lead plate 32 and the second battery lead plate 33 connect the different outfans of high-frequency ac power respectively, during energising, the highfield put outside forming around the body top, working cell launching non-equal electric field that columnar protrusions 34 and position, hole 35 are formed is outerplanar。
Columnar electrode assembly produces the dielectrophoresis effect of different non-equal electric fields under the alternating current of different frequency and different voltage, respective frequencies is selected according to characteristics of liquids to be dealt with, the corresponding dielectric power that the alternating current power supply of voltage produces makes the microgranule in liquid, make under dielectrophoresis effect in inhomogeneous field those can pass through filter membrane consider hole molecules polarization the company of being agglomerated into, increase its volume, and move to the direction that electric field intensity weakens, make these materials that need to process and filter the clear distance that mould surface keeps certain, thus strengthening the filter capacity of filter membrane, and realize weakening the concentration polarization effect even preventing filter membrane, reduce the blocking of film surface scale, extend the service life of filter membrane。Meanwhile, the electroosmotic effect that dielectrophoresis has makes hydrone produce the orientation mobile phenomenon through film, and the son that moisturizes is by efficiency, thus improving the processing speed to handled material。
Although disclosing embodiments of the invention and accompanying drawing for the purpose of illustration, but it will be appreciated by those skilled in the art that: in the spirit and scope without departing from the present invention and claims, various replacements, to change and modifications be all possible, therefore, the scope of the present invention is not limited to embodiment and accompanying drawing disclosure of that。
Claims (11)
1. the in-line arrangement membrane stack using column dielectrophoresis electrode, it is characterised in that: it includes front end face pressing plate, circulation waterway plate, in-line arrangement lamina membranacea and rear end face pressing plate；Press-fiting one group of in-line arrangement lamina membranacea between described front end face pressing plate and rear end face pressing plate side by side, the former water through hole of each described in-line arrangement lamina membranacea is collectively forming former water sprue, and the dense water through hole of described each in-line arrangement lamina membranacea is collectively forming dense water sprue；Arranging circulation waterway in described circulation waterway plate, described circulation waterway connects the entrance of former water sprue and the outlet of dense water sprue；Former water inlet in described circulation waterway side and the area ratio of former water sprue at opposite side are less than 1:2；Described in-line arrangement lamina membranacea includes housing, columnar electrode assembly and filter membrane, and described filter membrane is arranged on the both sides of housing, and described columnar electrode assembly is arranged between two filter membranes；Described columnar electrode assembly includes the first battery lead plate and the second battery lead plate, divides equally cloth and be provided with columnar protrusions and position, hole on the first battery lead plate, the second battery lead plate, the columnar protrusions of the first battery lead plate and the position, hole of Kong Weiyu the second battery lead plate and columnar protrusions locations complementary；After the raised face (RF) with columnar protrusions of the first battery lead plate and the second battery lead plate fastens relatively, wherein the columnar protrusions of a battery lead plate is embedded within the position, hole of another battery lead plate；First battery lead plate and the second battery lead plate connect the different outfans of high-frequency ac power respectively, form the acting surface to the non-equal electric field of emission on the non-protruding face of the first battery lead plate and the second battery lead plate；Described housing is provided with the product water out producing water cavity between connection two filter membranes。
2. a kind of in-line arrangement membrane stack using column dielectrophoresis electrode as claimed in claim 1, it is characterised in that: described former water inlet is multiple entry structure, and the area ratio of the area sum of each entrance and described former water sprue is less than 1:2。
3. a kind of in-line arrangement membrane stack using column dielectrophoresis electrode as claimed in claim 1 or 2, it is characterised in that: described area ratio is 1:10。
4. a kind of in-line arrangement membrane stack using column dielectrophoresis electrode as claimed in claim 1, it is characterised in that: the connected mode of described former water inlet and former water sprue is the center that former water inlet is plugged on former water sprue。
5. a kind of in-line arrangement membrane stack using column dielectrophoresis electrode according to claim 1, it is characterised in that: the first described battery lead plate and the surface of the second battery lead plate have insulating barrier。
6. a kind of in-line arrangement membrane stack using column dielectrophoresis electrode according to claim 1 or 5, it is characterized in that: after described the first battery lead plate, the raised face (RF) of the second battery lead plate fasten relatively, wherein the top of the columnar protrusions that a battery lead plate is made flushes with the non-protruding face of another battery lead plate。
7. a kind of in-line arrangement membrane stack using column dielectrophoresis electrode according to claim 1, it is characterized in that: described the first battery lead plate, the second battery lead plate adopt sheet metal or slice stamping molding, on it, the columnar protrusions of molding and position, hole form interlaced array distribution。
8. a kind of in-line arrangement membrane stack using column dielectrophoresis electrode according to claim 7, it is characterized in that: described interlaced array distribution mode is: the odd positions of the line n of the first battery lead plate and the even bit of the (n+1)th row are set to columnar protrusions, and the even number position of line n and the odd positions of the (n+1)th row are position, hole；The columnar protrusions of the second battery lead plate is then corresponding with the position, hole of the first battery lead plate and columnar protrusions position with position, hole。
9. a kind of in-line arrangement membrane stack using column dielectrophoresis electrode according to claim 7, it is characterized in that: described interlaced array distribution mode is: the line n of the first battery lead plate is columnar protrusions or position, hole, and the (n+1)th row is position, hole or columnar protrusions；The columnar protrusions of the second battery lead plate is then corresponding with the position, hole of the first battery lead plate and columnar protrusions position with position, hole。
10. a kind of in-line arrangement membrane stack using column dielectrophoresis electrode according to claim 1 or 5 or 7 or 8 or 9, it is characterised in that: described the first battery lead plate, the thickness of slab of the second battery lead plate are identical；Cross-sectional diameter≤the 2.5mm of described columnar protrusions；Described columnar protrusions and Kong Weiwei matched in clearance, fit clearance is not more than monolateral 0.2mm。
11. according to a kind of in-line arrangement membrane stack using column dielectrophoresis electrode described in claim 1 or 5 or 7 or 8 or 9, it is characterised in that: the first described battery lead plate and the second battery lead plate are corrugated plating。
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104667754A (en) * | 2015-02-10 | 2015-06-03 | 内蒙古天一环境技术有限公司 | Dielectrophoresis in-line type membrane assembly |
| CN204918102U (en) * | 2015-09-15 | 2015-12-30 | 内蒙古天一环境技术有限公司 | Can realize in -line arrangement membrane stack of auto purification |
| CN205627652U (en) * | 2016-03-23 | 2016-10-12 | 内蒙古天一环境技术有限公司 | Use in -line arrangement membrane stack of column dielectrophoresis electrode |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104667754A (en) * | 2015-02-10 | 2015-06-03 | 内蒙古天一环境技术有限公司 | Dielectrophoresis in-line type membrane assembly |
| CN204918102U (en) * | 2015-09-15 | 2015-12-30 | 内蒙古天一环境技术有限公司 | Can realize in -line arrangement membrane stack of auto purification |
| CN205627652U (en) * | 2016-03-23 | 2016-10-12 | 内蒙古天一环境技术有限公司 | Use in -line arrangement membrane stack of column dielectrophoresis electrode |
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