CN104941452A - Method and testing device for reducing membrane pollution through alternate inhomogeneous field - Google Patents
Method and testing device for reducing membrane pollution through alternate inhomogeneous field Download PDFInfo
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- CN104941452A CN104941452A CN201510416408.1A CN201510416408A CN104941452A CN 104941452 A CN104941452 A CN 104941452A CN 201510416408 A CN201510416408 A CN 201510416408A CN 104941452 A CN104941452 A CN 104941452A
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Abstract
The invention discloses a method and testing device for reducing membrane pollution through an alternate inhomogeneous field. A lower filter cavity and an upper filter cavity are vertically symmetric about a flat plate micro-filtration membrane as a symmetric center, a needle point electrode device is arranged in the upper filter cavity, and a plate electrode is arranged in the lower filter cavity. The needle point electrode device is provided with array type needle point electrodes which are arranged in m rows from left to right and arranged in n lines from front to back, each needle point electrode is connected with a conductor wire, m conductor wires in each line of needle point electrodes pass through hollow pipes to be connected with a wire diverter, and the n wire diverters are connected to a MCU control box. A membrane hole is scoured by different angles through the alternately-changing field, foreign particles are made to move between the surface of the membrane and the electrodes, and the situation that the foreign particles are centralized on the surfaces of the electrodes or the surface of the membrane to cause pollution to the surfaces of the electrodes or the surface of the membrane can be avoided.
Description
Technical field
The present invention relates to decelerating membrane pollution and concentration polarization technology, application alternately inhomogeneous field is alleviated the pollution occurred in plant running process.
Background technology
Film is a kind of material with Selective Separation function, utilize the Selective Separation of film can realize the separation of different component in feed liquid, purification, concentrated, there are efficient, energy-saving and environmental protection, molecule level is filtered and filter process is simple, be easy to the characteristics such as control, therefore food, medicine, biology, environmental protection, chemical industry, the energy, water treatment is widely used in, the field such as bionical, has become one of most important means in separation science.But but along with fouling membrane while membrane separation technique extensive use, fouling membrane is in membrane filtration processes, particulate in feed liquid, colloidal particle or solute transportation are owing to interacting with film existence Physicochemical or mechanism and adsorbing, deposit and cause membrane aperture to diminish or block in film surface or fenestra of causing, film infiltration capacity and stalling characteristic is made to produce irreversible change, the service life of film shortens, and greatly have impact on the practical application of membrane separation technique.Therefore, for fouling membrane Producing reason, take corresponding countermeasure, very necessary to the partly or completely recovery of film properties.
The document of Chinese Patent Application No. 200620155007.1 discloses the Ultra filtration membrane assembly of a kind of ultrasonic field and high-voltage alternating impulse electric field complex intensifying.For Ultrafiltration experiment, adopt ultrasonic field and high-voltage alternating impulse electric field, arrange upper and lower base plate, 8 ultrasonic wave installing holes processed by each substrate, the cavity that intermediate groove is formed is used for the flowing of feed liquid, and upper lower conducting plate is positioned at cavity and forms electric field at cavity.But the upper lower conducting plate of this device is fixing, can not carry out regulating the distance with Flat Membrane in real time as the case may be; Secondly, high-voltage pulse size and frequency non-adjustable, scene can not be carried out; Again, what this patent adopted is uniform electric field, and this is a kind of relatively more conventional method, effect does not but have the inhomogeneous field that can convert foreign particle Impact direction have superiority.According to above summation, cause this device to go back imperfection in some aspects, use inconvenience.
Summary of the invention
The object of the invention is the Ultra filtration membrane assembly Problems existing for overcoming existing ultrasonic field and high-voltage alternating impulse electric field complex intensifying, a kind of alternately inhomogeneous field decelerating membrane pollution method and experimental provision are provided, use electric field heterogeneous, foreign particle is carried out to the motion control of different angles, more effectively can slow down the pollution in fenestra, improve permeation flux.
A kind of alternately technical scheme that inhomogeneous field decelerating membrane pollution experimental provision adopts of the present invention is: the present invention includes external protector and flat micro-filtration, being positioned at flat micro-filtration upper portion is upper filter cavity, being positioned at flat micro-filtration lower portion is lower filter cavity, lower filter cavity and upper filter cavity are that symmetrical centre is symmetrical up and down with flat micro-filtration, upper filter cavity inside is provided with needlepoint electrode device, needlepoint electrode device connects vertical adjustable screw lower end, and adjustable screw upper end protrudes upward outside external protector top; Arrange plate electrode in lower filter cavity, plate electrode is connected with bottom external protector by another adjustable screw; Plate electrode is connected to pulse power generator through a conductor wire, and pulse power generator connects MCU control box through another root conductor wire, and MCU control box is connected with needlepoint electrode device through conductor shunt; Needlepoint electrode device has from left to right arranges that m is capable, arrange the array needlepoint electrode that n arranges from front to back, each needlepoint electrode all connects a conductor wire, m root conductor wire in each row needlepoint electrode is all connected with a conductor shunt after a hollow tube, and n conductor shunt is all connected to MCU control box.
A kind of alternately technical scheme that inhomogeneous field decelerating membrane pollution experimental technique adopts of the present invention comprises the following steps:
A, regulating impulse power source generator produce pulse voltage, set running time and the experiment running total time of each row needlepoint electrode; Regulate adjustable screw, make the distance between needlepoint electrode device and flat micro-filtration and the distance between plate electrode and flat micro-filtration;
The work of B, MCU control box control impuls power source generator produces pulse voltage, controls first row needlepoint electrode energising in needlepoint electrode device, forms the electric field of emitting shape at upper filter cavity and lower filter cavity inside; After half period, the positive pole of pulse power generator and negative pole are exchanged;
C, after the running time of needlepoint electrode, MCU control box controls first row needlepoint electrode and stops energising, and secondary series needlepoint electrode starts energising; After half period, the positive pole of pulse power generator and negative pole are exchanged;
D, again after the running time of needlepoint electrode, so repeatedly control previous column needlepoint electrode and stop energising, control the energising of next column needlepoint electrode again, after next column needlepoint electrode energising work half period, the positive pole of pulse power generator 1 and negative pole are exchanged; Circulation like this is until last the n-th row needlepoint electrode end-of-job.
Beneficial effect of the present invention is:
1, the present invention utilizes electric field heterogeneous, adopt the electric field of alternately change, washing away of different angles is carried out to fenestra, foreign particle is moved between film surface and electrode, can prevent foreign particle from concentrating on electrode surface or film surface, cause the pollution of electrode surface or face.
2, the present invention adopts the controller of grouping, effectively can convert and be adsorbed on foreign particle Impact direction in face or fenestra, contributes to loosening of foreign particle, decelerating membrane pollution.
3, the present invention can regulate the distance between needle point electrode assembly and flat micro-filtration, can regulate distance between plate electrode and flat micro-filtration, device is adjusted to the most rational state, improves the operational efficiency of experiment.
Accompanying drawing explanation
Fig. 1 is the present invention's one alternately inhomogeneous field decelerating membrane pollution device elevation cross-sectional view;
Fig. 2 is the three-dimensional structure diagram of the needlepoint electrode device of Fig. 1;
Fig. 3 is the electric drawings of Fig. 1;
Fig. 4 is foreign particle stressing conditions analysis chart in inhomogeneous field in Fig. 1;
Fig. 5 is the flow chart that the present invention replaces inhomogeneous field decelerating membrane pollution experimental technique;
Each several part sequence number in accompanying drawing and title: 1, pulse power generator; 2, conductor wire; 3, upper water inlet; 4, upper filter cavity; 5, intake; 6, lower water inlet; 7, plate electrode; 8, standing screw; 9, adjustable screw; 10, nut; 11, pad; 12, device external protector; 13, needlepoint electrode device; 14, upper water-out mouth; 15, thin layer and film pad; 16, filter plate; 17, lower filter cavity; 18, lower outlet; 19, hollow tube; 20, nut; 21, hollow is dull and stereotyped; 22, first row needlepoint electrode; 23, fenestra; 24, power line a; 25, power line b; 26, foreign particle; 27, MCU control box; 28, commercial power interface; 29, flat micro-filtration; 30, conductor shunt, 31, secondary series needlepoint electrode; 32, the n-th row needlepoint electrode.
Detailed description of the invention
See Fig. 1, the symmetrical structure up and down that the main part that the present invention replaces inhomogeneous field decelerating membrane pollution device is is symmetrical centre with flat micro-filtration 29.Protection and fixation are played in the outside that external protector 12 is positioned at whole apparatus main body part.Flat micro-filtration 29 is flatly positioned at the mid portion of whole device, and device is divided into upper and lower two parts from volume.Flat micro-filtration 29 is made up of thin layer and film pad 15, filter plate 16, intake 5, filter plate 16 plays a supportive role to the thin layer of lower surface attached thereto and film pad 15, filter plate 16 is distributed with a lot of groove, feed liquid after filtering via thin layer and film pad 15 can be drained into intake 5 place, flow out from intake 5 under the effect of hydraulic pressure or external pumping force.The upper portion being positioned at flat micro-filtration 29 is upper filter cavity 4, and the left side wall top of upper filter cavity 4 is provided with water inlet 3, and upper water inlet 3 connects with external feed liquid phase, and the right side wall bottom of upper filter cavity 4 is provided with upper water-out mouth 14.Needlepoint electrode device 13 is provided with in upper filter cavity 4 inside; needlepoint electrode device 13 is flatly positioned at the centre position of the left and right directions of filter cavity 4 and the inclined top position of above-below direction; needlepoint electrode device 13 connects the lower end of vertical adjustable screw 9, and the upper end of adjustable screw 9 protrudes upward outside external protector 12 top.Nut 20 is equipped with at the part place be connected mutually at adjustable screw 9 and external protector 12 top; in order to solution infiltration in anti-locking apparatus; pad 11 is adopted between nut 20 and external protector 12 top; with threaded engagement between adjustable screw 9 and nut 20; adjustable screw 9 can be driven to move up and down by the rotation of nut 20 thus, thus regulate the distance d1 between needle point electrode assembly 13 and flat micro-filtration 29.
The lower portion being positioned at flat micro-filtration 29 is lower filter cavity 17, and lower filter cavity 17 is that symmetrical centre is symmetrical up and down with upper filter cavity 4 with flat micro-filtration 29.The left side wall top of lower filter cavity 17 has lower water inlet 6, and lower water inlet 6 is communicated with external feed liquid phase, and the bottom of the right side wall of lower filter cavity 17 has lower outlet 18.In lower filter cavity 17, plate electrode 7 is set; plate electrode 7 is stainless steel; plate electrode 7 is flatly positioned at the middle lower portion of lower filter cavity 17; plate electrode 7 is also connected with the bottom of nut 20 with external protector 12 by adjustable screw 9; adjustable screw 9 drives adjustable screw 9 to move up and down by rotating nut 20, can regulate the distance d2 of flat micro-filtration 29 and plate electrode 7 thus.In order to prevent infiltration, the part be still connected mutually in nut 20 and the bottom of external protector 12 adopts pad 11.
With standing screw 8, external protector 12, upper filter cavity 4, lower filter cavity 17 are fixed together with flat micro-filtration 29, make main part become as a whole.The two ends up and down of standing screw 8 are fixed by nut 10, between nut 10 and external protector 12 outside, carry out water-proofing treatment by pad 11.
Plate electrode 7 is connected to pulse power generator 1 through a conductor wire 2, and pulse power generator 1 connects MCU control box 27 through another root conductor wire 2, MCU control box 27 is connected with needlepoint electrode device 13 through conductor shunt 30.Pulse power generator 1 is connected with external power source by commercial power interface 28, be responsible for the conversion carrying out voltage and frequency, the pulse power (voltage swing V1, frequency f) required for generation supplies needle point electrode assembly 13 and plate electrode 7 afterwards, ensures voltage swing on upper and lower needlepoint electrode device 13 and these two electrodes of plate electrode 7 like this and frequency is equal, direction is contrary.
The structure of needlepoint electrode device 13 shown in Figure 2 again, needlepoint electrode device 13 has several needlepoint electrodes that array is arranged, several needlepoint electrodes from left to right arrange that m is capable, arrange n row from front to back, the numerical value of m and n is determined according to the concrete condition of the size of flat micro-filtration 29 surface area.It is made that several needlepoint electrodes are stainless steel, is all fixedly welded on hollow flat board 21, and the horizontal length of dull and stereotyped 21 fore-and-aft directions of hollow is L, and to be that the spacing between R, n row needlepoint electrode is equal be for the horizontal length of left and right directions
, and the first row needlepoint electrode 22 of forefront to hollow flat board 21 border between distance and rearmost last row n-th row needlepoint electrode 32 to hollow flat board 21 border between distance be equally p, p value is less than
value, the distance between m needlepoint electrode 22 in each row is also equal is r, and each row needlepoint electrode 22 left and right sides is q from the distance on dull and stereotyped 21 borders of hollow, so
.
Each needlepoint electrode in each row needlepoint electrode 22 is connected with a conductor wire, so each row needlepoint electrode is connected with m root conductor wire, for last row n-th row needlepoint electrode 32, the m root conductor wire be connected with this row needlepoint electrode 32 is inner through hollow dull and stereotyped 21, then is connected with a conductor shunt 30 by after a hollow tube 19.Power to after the conductor wire 2 being connected to MCU control box 27 is split into m root conductor wire by conductor shunt 30 m needlepoint electrode 32 of the n-th row needlepoint electrode 32.The arrangement mode of each row needlepoint electrode and power supply mode identical with the n-th row needlepoint electrode 32, namely each row needlepoint electrode connects a conductor shunt 30 through a hollow tube 19 all accordingly, therefore always total n hollow tube 19 and n conductor shunt 30, n conductor shunts 30 all connect MCU control box 27.Needlepoint electrode device 13 is controlled by MCU control box 27, first row needlepoint electrode 22, secondary series needlepoint electrode 31 ... n-th row needlepoint electrode 32 carries out circulation energising under the control of MCU, only has a row needlepoint electrode in operation at every turn, remaining is in halted state, the running time of each row is determined by field condition, is assumed to be t (s).
The lower end of adjustable screw 9 is connected with the middle part of needlepoint electrode device 13, needlepoint electrode device 13 top also connects n hollow tube 19 except adjustable screw 9, n hollow tube 19 is perpendicular to being horizontally arranged on a horizontal line in device, lower one end is connected with needlepoint electrode device 13, upper end penetrates external protector 12 and leads to device outside, penetrating component height is a little more than external protector 12 top exterior walls, the conductor shunt 30 identical with hollow tube 19 quantity is placed in the top of hollow tube 19 successively, conductor shunt 30 one end is connected with MCU control box 27, one end is connected with the conductor wire in hollow tube 19.
Alternately inhomogeneous field decelerating membrane pollution device electric drawings as shown in Figure 3, alternately inhomogeneous field decelerating membrane pollution device is controlled by MCU control box 27.MCU control box 27 comprises power module, MCU processing unit, the first relay module, the second relay module ... n-th relay module.Power module is that MCU processing unit is powered, first relay module, the second relay module ... n-th relay module and power module are connected MCU processing unit respectively, the first relay module, the second relay module ... n-th relay module after being controlled by MCU processing unit again respectively with first row needlepoint electrode, secondary series needlepoint electrode ... n-th row needlepoint electrode is connected.Pulse power generator 1 one termination commercial power interface 28 is powered for pulse power generator 1, and the other end is connected with the MCU processing unit in MCU control box 27, and MCU processing unit is used for power supply size V1 and the frequency f of control impuls power source generator 1 output.
Foreign particle shown in Figure 4 is stressing conditions analysis chart in inhomogeneous field, for first row needlepoint electrode 22, first row needlepoint electrode 22 is total m needlepoint electrode always, be decided to be needlepoint electrode 22-1,22-2 respectively ... 22-m, the pair of electrodes forming electric field up and down one of whole device is the plate of plate electrode 7, one is the needlepoint type of needlepoint electrode device 13, therefore a needle point from needlepoint electrode device 13 is formed in space toward dull and stereotyped radial electric field, the direction of this electric field is changing from vertical direction always, is therefore inhomogeneous field.At this with first row needlepoint electrode 22 positively charged, plate electrode 7 is electronegative is example, therefore first row needlepoint electrode 22 is positive pole, plate electrode 7 is negative pole, needlepoint electrode 22-1 produces electric field and is represented by power line 24, the electric field that needlepoint electrode 22-2 produces is represented by power line 25, because the foreign particle 26 in upper filter cavity 4 is electronegative, therefore the effect of power is subject in the electric field, each needlepoint electrode 22-1, 22-2, 22-3 ... .. the power line that produces of 22-m is all to the effect that foreign particle 26 particle is strong, therefore foreign particle 26 is subject to the effect of multiple power in this electric field, suffered power is making a concerted effort of each electric field force, owing to being inhomogeneous field, make a concerted effort direction substantially point to forward electrode direction but and be not orthogonal to flat micro-filtration 29 surface, but there is an angle.Along with the carrying out of experiment, also the accumulation of foreign particle 26 is had in the fenestra 23 of flat micro-filtration 29,26 pairs of fenestra 23 effects of resulting in blockage of these foreign particles, the permeation flux of film is caused to decline, unit efficiency reduces, and in this device, the foreign particle 26 blocked owing to causing fenestra 23 is also subject to the effect of electric field force, the direction of power is substantially pointed to the direction of forward electrode and the direction of needlepoint electrode but is not perpendicular to flat micro-filtration 29, but and angle presentation between flat micro-filtration 29
, in time converting the energising of needlepoint electrode row, the direction of these foreign particles 26 will change, and particularly in fenestra 23, the foreign particle loading angle of deposition changes again, does not stop the effect of the power being subject to different directions thus.
Alternately inhomogeneous field decelerating membrane pollution experiment flow figure as shown in Figure 5, first regulating impulse power source generator 1, make it to produce suitable pulse voltage, voltage swing V1, frequency f, resets running time t (s) (t>1/f) of each row needlepoint electrode, total columns n of needlepoint electrode device 13, and experiment running total time T (s) (T=knt
), then regulate adjustable screw 9 by rotating nut 20, the distance d1 between needlepoint electrode device 13 and the flat micro-filtration 29 and distance d2 between plate electrode 7 and flat micro-filtration 29 is adjusted to suitable position.Started working by MCU control box 27 control impuls power source generator 1, (voltage swing V1, frequency are f) to produce pulse voltage, now needlepoint electrode device 13 and plate electrode 7 are all electrified, and control first row needlepoint electrode 22 in needlepoint electrode device 13 and start the work of being energized, so form the electric field of emitting shape at upper filter cavity 4 and lower filter cavity 17 inside.Again by feed liquid in the upper filter cavity 4 and lower filter cavity 17 of water inlet 3 and water inlet 6 access to plant, work owing to only allowing first row needlepoint electrode 22, therefore the side part of flat micro-filtration 29 near first row needlepoint electrode 22 is affected emphatically, foreign particle 26 in feed liquid is general all electronegative, therefore foreign particle 26 is subject to electric field force effect along with after feed liquid access to plant, the size and Orientation of electric field force is that foreign particle 26 is at needlepoint electrode 22-1, 22-2 ... stressed making a concerted effort in the power line that 22-m produces, those foreign particles 26 being adsorbed on film surface are also subject to the effect of a power, the foreign particle 26 that in fenestra 23, some has piled up precipitation is subject to the effect of electric field force too, owing to being inhomogeneous field, therefore Impact direction is not perpendicular to film surface, the angle on direction and film surface is
.When after half period (1/2f (s)), the positive pole of pulse power generator 1 and negative pole are exchanged, namely allow needlepoint electrode device 13 lead to negative electricity, plate electrode 7 leads to positive electricity, and the Impact direction of all foreign particles 26 is occurred
the sudden change of upset, because pulse voltage direction ceaselessly changes, direction of an electric field is also ceaselessly changing, circulation like this, namely produce an inhomogeneous field alternately changed, so foreign particle 26 just moves back and forth between face and electrode, such foreign particle 26 both can not be adsorbed in film surface, also can not assemble at electrode surface, along with the current of access to plant flow out from upper water-out mouth 14 and lower outlet 18, filtered solution then leads to outside by flat micro-filtration 29 from intake 5.Some in fenestra 23 is piled up to the foreign particle 26 of precipitation, be different from the effect of ordinary electric field, ceaselessly be subject to the effect that direction is not orthogonal to the power on film surface, loosen back and forth, serve as time t(s) after, control first row needlepoint electrode 22 by MCU control box 27 to quit work, secondary series needlepoint electrode 31 starts energising and repeats said process, now in fenestra 23 foreign particle 26 forces are applied again, but loading angle there occurs change again, to make in fenestra foreign particle 26 again in the power that different angles are loosened back and forth, when having crossed again time t(s) after, control secondary series needlepoint electrode 31 by MCU control box 27 to quit work, 3rd row needlepoint electrode is started working, thus until the n-th row needlepoint electrode 32 starts energising repeat said process.Therefore the present invention is at the running time t(s through needlepoint electrode) after, control previous column needlepoint electrode and stop energising, control the energising of next column needlepoint electrode again, after next column needlepoint electrode energising work half period, the positive pole of pulse power generator 1 and negative pole are exchanged; Circulation like this is until last the n-th row needlepoint electrode end-of-job.In the process, in fenestra 23, foreign particle 26 loading angle is changing always, in fenestra 23 foreign particle 26 these do not stop the power of translation-angle do not stop effect under, loosened, when loosening to a certain degree, in fenestra 23, some foreign particle 26 just can take fenestra out of along with current, and the flux of flat micro-filtration 29 obtains certain recovery thus.Now judge whether experiment running total time T (s) arriving setting, if do not reach setting-up time T (s), so restart, first row needlepoint electrode 22 comes into operation, and all the other row needlepoint electrodes decommission, and circulate thus; If arrive setting-up time T (s), so MCU control box 27 control system decommissions, and experiment terminates, disposal data.
Claims (6)
1. one kind replaces inhomogeneous field decelerating membrane pollution experimental provision, comprise external protector (12) and flat micro-filtration (29), being positioned at flat micro-filtration (29) upper portion is upper filter cavity (4), being positioned at flat micro-filtration (29) lower portion is lower filter cavity (17), lower filter cavity (17) and upper filter cavity (4) with flat micro-filtration (29) for symmetrical centre is symmetrical up and down, it is characterized in that: upper filter cavity (4) inside is provided with needlepoint electrode device (13), needlepoint electrode device (13) connects vertical adjustable screw (9) lower end, adjustable screw (9) upper end protrudes upward outside external protector (12) top, arrange plate electrode (7) in lower filter cavity (17), plate electrode (7) is connected with external protector (12) bottom by another adjustable screw (9), plate electrode (7) is connected to pulse power generator (1) through a conductor wire (2), pulse power generator (1) connects MCU control box (27) through another root conductor wire (2), and MCU control box (27) is connected with needlepoint electrode device (13) through conductor shunt (30), needlepoint electrode device (13) has from left to right arranges that m is capable, arrange the array needlepoint electrode that n arranges from front to back, each needlepoint electrode all connects a conductor wire, m root conductor wire in each row needlepoint electrode is all connected with a conductor shunt (30) after a hollow tube (19), and n conductor shunt (30) is all connected to MCU control box (27).
2. replace inhomogeneous field decelerating membrane pollution experimental provision according to claim 1, it is characterized in that: upper filter cavity (4) left side wall top is provided with the upper water inlet (3) connected with external feed liquid phase, and upper filter cavity (4) right side wall bottom is provided with upper water-out mouth (14); Lower filter cavity (17) left side wall top has the lower water inlet (6) be communicated with external feed liquid phase, and the bottom of lower filter cavity (17) right side wall has lower outlet (18).
3. replace inhomogeneous field decelerating membrane pollution experimental provision according to claim 1; it is characterized in that: the part place be connected mutually at adjustable screw (9) and external protector (12) establishes nut (20); pad (11) is established, with threaded engagement between adjustable screw (9) and nut (20) between nut (20) and external protector (12).
4. replace an experimental technique for inhomogeneous field decelerating membrane pollution experimental provision as claimed in claim 1, it is characterized in that comprising the following steps:
A, regulating impulse power source generator (1) produce pulse voltage, set running time and the experiment running total time of each row needlepoint electrode; Regulate adjustable screw (9), make the distance between needlepoint electrode device (13) and flat micro-filtration (29) and the distance between plate electrode (7) and flat micro-filtration (29);
B, MCU control box (27) control impuls power source generator (1) work produces pulse voltage, controls first row needlepoint electrode energising in needlepoint electrode device (13), forms the electric field of emitting shape at upper filter cavity (4) and lower filter cavity (17) inside; After half period, the positive pole of pulse power generator (1) and negative pole are exchanged;
C, after the running time of needlepoint electrode, MCU control box (27) controls first row needlepoint electrode and stops energising, and secondary series needlepoint electrode starts energising; After half period, the positive pole of pulse power generator (1) and negative pole are exchanged;
D, again after the running time of needlepoint electrode, so repeatedly control previous column needlepoint electrode and stop energising, control the energising of next column needlepoint electrode again, after next column needlepoint electrode energising work half period, the positive pole of pulse power generator (1) and negative pole are exchanged; Circulation like this is until last the n-th row needlepoint electrode end-of-job.
5. experimental technique according to claim 4, is characterized in that: in step B, and feed liquid enters in upper filter cavity (4) and lower filter cavity (17) from water inlet after starting energising by first row needlepoint electrode (22).
6. experimental technique according to claim 4, is characterized in that: judge whether after step D terminates to arrive experiment running total time, if do not arrived, step B again; If arrived, MCU control box (27) decommissions.
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Cited By (3)
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| CN106622067A (en) * | 2016-12-01 | 2017-05-10 | 段海章 | Physical system for establishing complex and multi-domain inhomogeneous field |
| CN111330461A (en) * | 2020-04-08 | 2020-06-26 | 中国科学院过程工程研究所 | Magnetic response oil-water separation membrane and preparation method and self-cleaning method thereof |
| CN115155332A (en) * | 2022-07-07 | 2022-10-11 | 南京大学 | In-situ membrane pollution resisting method for low-voltage electric field coupling conductive ultrafiltration membrane |
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| JPH11216343A (en) * | 1998-02-02 | 1999-08-10 | Toshiba Plant Kensetsu Co Ltd | Waste liquid treating device |
| CN201008777Y (en) * | 2006-12-20 | 2008-01-23 | 华南理工大学 | Ultrasonic field and high voltage ac impulse electric field complex strengthened ultrafiltration membrane separation component |
| CN204973608U (en) * | 2015-07-16 | 2016-01-20 | 江苏大学 | Non - uniform electric field slows down membrane pollution experimental apparatus in turn |
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| JPH11137971A (en) * | 1997-11-12 | 1999-05-25 | Tokai Univ | Electric filter device and its control method |
| JPH11216343A (en) * | 1998-02-02 | 1999-08-10 | Toshiba Plant Kensetsu Co Ltd | Waste liquid treating device |
| CN201008777Y (en) * | 2006-12-20 | 2008-01-23 | 华南理工大学 | Ultrasonic field and high voltage ac impulse electric field complex strengthened ultrafiltration membrane separation component |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106622067A (en) * | 2016-12-01 | 2017-05-10 | 段海章 | Physical system for establishing complex and multi-domain inhomogeneous field |
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| CN111330461A (en) * | 2020-04-08 | 2020-06-26 | 中国科学院过程工程研究所 | Magnetic response oil-water separation membrane and preparation method and self-cleaning method thereof |
| CN115155332A (en) * | 2022-07-07 | 2022-10-11 | 南京大学 | In-situ membrane pollution resisting method for low-voltage electric field coupling conductive ultrafiltration membrane |
| CN115155332B (en) * | 2022-07-07 | 2023-12-19 | 南京大学 | Method for in-situ membrane pollution resistance of low-voltage electric field coupling conductive ultrafiltration membrane |
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| CN104941452B (en) | 2017-04-05 |
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