CN102641663A

CN102641663A - Motional electrodialysis equipment and water desalinating method

Info

Publication number: CN102641663A
Application number: CN201210103026XA
Authority: CN
Inventors: 何宗彦
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-04-10
Filing date: 2012-04-10
Publication date: 2012-08-22

Abstract

The invention relates to motional electrodialysis equipment and a water desalinating method. The motional electrodialysis equipment comprises a stator, a rotor and a dialysis tank, wherein a magnetic field is formed between the stator and the rotor; the dialysis tank is positioned in the magnetic field and is fixed with the stator; two sides of the dialysis tank are respectively connected with an electrode plate; the inside of the dialysis tank is divided into at least three spaces by at least one pair of anion and cation exchange membranes; two sides are polar water rooms, and the middle is a fresh water room; the upper surface and the bottom surface of each space are respectively provided with a water inlet pipe and a water outlet pipe; and a lead is connected between the two electrode plates. The motional electrodialysis equipment is new equipment for seawater desalination and sewage purification treatment, a generator, a power supply and a relevant control circuit are omitted, so that the energy use ratio is improved, and the equipment structure is simplified. The electrodialysis equipment has the advantages of low material price, lower equipment cost and operation cost and stable ion exchange membrane quality, is convenient to replace and maintain and can be widely applied to seawater desalination and sewage treatment, and the raw water use ratio can be above 80%.

Description

Moving electrodialysis plant and the water desalination method of giving birth to

Technical field

The present invention relates to the equipment of a kind of desalinization and sewage purification.

Background technology

Seawater, the method for bitter desalting and sewage purification has many kinds, and quality is respectively arranged, and several main technology are summarized as follows:

1. the way of distillation (comprise multiple-effect evaporation ME, flash distillation FLASH with press steam distillation VC etc.)

Let bitter or seawater ebuillition of heated evaporate, be condensed into steam the technology of fresh water again.Major advantage is that structure is simple relatively, processing ease, gained fresh water water quality are good.Shortcoming is that initial investment is big, and energy consumption high (generally being suitable for the available occasion that has surplus heat, like thermo-power station) for reducing operating cost, must be leaned on scale effect.Be not suitable for middle-size and small-size equipment development.

2. hyperfiltration

Side selecting the permeability film adds the pressure higher than naturally osmotic, is pressed onto the another side of pellicle to the hydrone in the solution, thereby obtains the technology of dilute solution; Reverse osmosis technology can be removed dissolubility salt and colloid microorganism and the organic matter more than 99 % more than 90 % from water; But reverse osmosis technology needs strict former quality, as not meeting the demands, then needs complicated pretreatment technology and more expensive pre-processing device; The replacement cost of expensive reverse osmosis membrane assembly is very high; Also not low about the cost and the consumption of parts (like high-pressure pump), the former water use efficiency of counter-infiltration is less than 50%, and the processing of dense water and the energy consumption of bringing thus can not considered.If adopt the seawater film to desalinize seawater fully, outside the membrane removal cost, energy consumption is also very high.

3. electroosmose process

Electroosmose process (electrodialysis ED and electrodeionization EDI) is to utilize amberplex under electric field action, to separate the yin, yang ion in the salt solution, salt concentration in the freshwater room is reduced and obtains a kind of membrane separation technique of fresh water, technology maturation; Technology is simple, the desalination rate is higher, easy to operate, free from environmental pollution, and amberplex is than reverse osmosis membrane considerably cheaper, but electrodialysis has certain requirement to raw water quality; And can not remove organic matter and bacterium in the water, also need post processing as drinking water, the energy consumption of electrodialytic process and former water salt content have substantial connection; Salt content is high more; Energy consumption is big more, so be used for desalinization, must consider energy consumption and operating cost.

4. new technology is attempted

Some new inventions are tried hard to conventional art is combined with other technologies, to reduce cost and energy consumption.Such as with solar energy, wind energy and tide energy are introduced counter-infiltration or electrodialytic technique, to solve the domestic water problems of not having electricity and the short regional people of conventional energy resource.But because the low-density and the unstability of these energy forms; Sending electric energy needs extras to solve storage and transfer problem, sees do not have significant advantage from electric energy conversion efficiency and cost; Only if, directly these energy are used for desalinization without generating electricity this step earlier.

Summary of the invention

The purpose of this invention is to provide moving electrodialysis plant and the water desalination method of giving birth to, solve that traditional desalinization sewage water treatment method cost is high, big, the former water use efficiency of energy consumption is low, the technical problem of equipment fluctuation of service.

For realizing above-mentioned purpose, the present invention adopts following technical scheme:

A kind of moving living electrodialysis plant comprises stator, rotor and dialysis case, forms magnetic field between said stator and the rotor; Said dialysis case is arranged in magnetic field, and fixes with stator, and the both sides of said dialysis case respectively are connected with an electrode plate; Dialysis case inside separates to become at least three spaces by at least one pair of yin, yang amberplex, both sides be between utmost point water, middle is between fresh water; Each top and bottom, space respectively is provided with water inlet pipe and outlet pipe, connects a lead between two electrode plate.

Said magnetic field is the magnetic field of adopting the magnetic field of permanent magnet generation or adopting the energising magnet exciting coil to produce.

Said stator, dialysis case and rotor all are tubulars; The three is nested together in proper order, and stator is positioned at outermost layer, and rotor is interior; Permanent magnet sticks on rotor outer surface; The inboard and the armature spindle of said rotor connect together, and armature spindle is driven by internal combustion engine or other rotary machine, form the moving electrodialysis plant of giving birth to of shaft type.

Between said rotor and the dialysis case spacing is arranged.

Said stator, dialysis case and rotor are disc; Three's axial order is arranged; Stator is connected with bearing block through the stator bolster, and rotor is connected with bearing block through armature spindle, and armature spindle drives rotor rotation through belt; The south of permanent magnet, the arctic are connected with rotor with stator respectively, form the moving electrodialysis plant of giving birth to of disc type.

Said box house separates five spaces by two pairs of yin, yang amberplexes, and ecto-entad is followed successively by between two utmost point water, between two fresh water, and between middle dense water.

Resistance of said lead series connection.

A kind of water desalination method of using said moving living electrodialysis plant is positioned over the dialysis case that fills former water in the magnetic field, and described magnetic field producing method comprises the magnet exciting coil that adopts permanent magnet and employing energising generation magnetic field; In the dialysis case, be provided with pair of electrical pole plate and one or more pairs of anion and cation exchange membrane, exchange membrane and join and gripper shoe casing is divided into some fresh water, between dense water and utmost point water; These compartments all are provided with water inlet pipe and outlet pipe, make that former water can continue to get into fresh water; Dense water and utmost point water can continue to flow out, and two battery lead plates connect through the lead outside the magnetic field, let the dialysis case that the object that produces magnetic field is done relative motion; Described relative motion producing method comprises: make the dialysis case motionless, let the object of which movement that produces magnetic field, make former water cutting magnetic line; Utilize the rotational kinetic energy of various machines; Directly in former water, produce motional electromotive force, make to form the moving electric current of giving birth in the former water, drive the zwitterion motion; Respectively through the zwitterion film, desalinate or purify former water with the electrodialysis mode.

Said former water comprises seawater, bitter, the surface water, underground water, running water, various industry or sanitary sewage.

Said machine comprises the rotary machine that the mechanical, electrical motivation of various heat, steam engine, steam turbine, wind-driven generator, tital generator, the hydraulic turbine or natural energy resources drive; Said machine carries out speedup or deceleration through using gear-box to the rotating speed of machine; Through the rotation direction of regular change machine or machinery, the outlet pipe with dense water or utmost point water and fresh water switches simultaneously, reaches the conversion sense of current; Lower polarity effect, aim of stable operation.

Compared with prior art the present invention has following characteristics and beneficial effect:

The invention provides a kind of new seawater, bitter desalination and sewage purification treatment facility are compared with the traditional electrical osmotic technique; Do not need generator, power supply and relevant control circuit, efficiency of energy utilization is improved; Device structure is able to simplify; Can be used for any use internal combustion engine or rotary machine, the place of machinery, enterprise and unit; Compare with counter-infiltration, material price is cheap, and equipment cost and operating cost are lower, the amberplex steady quality, and replacement and easy to maintenance, former water use efficiency can reach more than 80%.

Desalination, seawater that the present invention can be widely used in seawater and bitter concentrate salt manufacturing; Dairy products refine, the fruit juice depickling, and chemical products are purified; The pure water of industries such as light industry is produced; Electronics, pharmaceuticals industry are produced the pretreatment procedure of high purity water and the elementary softening desalination of boiler feedwater etc., and aspect environmental protection, technology of the present invention is applicable to that also waste water, liquid waste processing and the precious metal of industries such as electronics, medicine, chemical industry, thermal power generation, food, beer, beverage, printing and dyeing and application reclaim.

Description of drawings

Below in conjunction with accompanying drawing the present invention is done further detailed explanation.

Fig. 1 principle schematic of the present invention.

Zwitterion moved apart sketch map in Fig. 2 dialysis case of the present invention.

The moving structural representation of giving birth to the electrodialysis machine of Fig. 3 embodiment of the invention one axial internal rotor-external stator type.

The structural representation of the dialysis case of Fig. 4 embodiment of the invention one.

The generalized section of the dialysis case of Fig. 5 embodiment of the invention one.

The structural representation of Fig. 6 embodiment of the invention two disc type electrodialysis machines.

The structural representation of the dialysis case of Fig. 7 embodiment of the invention two.

Reference numeral: between 1-stator, 2-dialysis case, 3-battery lead plate, 5-anion-exchange membrane, 6-cation-exchange membrane, 7-rotor, 8-armature spindle, 9-permanent magnet, the 9.1-permanent magnet South Pole, the 9.2-permanent magnet arctic, 10-outlet pipe, 14-water inlet pipe, 16-stator bolster, 18-belt, 19-bearing block, 20-lead, 21-resistance, 22-utmost point water, between 23-fresh water, between the dense water of 24-.

The specific embodiment

The present invention proposes a kind of new moving living electrodialysis plant and water desalination method, this equipment need with various internal combustion engines, like gasoline engine or diesel engine; Machinery such as motor or turned etc. is used, and utilizes the rotational kinetic energy of these machineries or machine to be converted into direct current, desalinizes seawater or purifies poor-quality water with the electrodialysis mode; Equipment according to the present technique exploitation can be used for any use internal combustion engine or rotary machine; The place of machinery, enterprise or unit are like all kinds of boats and ships; Adopt the island or the landlocked village of diesel power generation; Sea or land drilling crew, the factory and enterprise of all kinds and scale or family also can be used as pre-treatment (desalination) equipment of the counter-infiltration system of various scales.

Operation principle of the present invention is to adopt permanent magnet to set up magnetic field, and the dialysis case is put in the magnetic field, and purpose is in former water, to produce motional electromotive force through the cutting magnetic field magnetic line of force, provides electrodialytic technique required DC current; The design of said dialysis case can conveniently exchange for outside the exchange membrane except the considered volume size that is filled with water, and also must consider suitable shape; Owing to be placed between rotor and the stator, so casing thickness can not be big, in order to avoid leakage field is serious; The casing material can be considered the stainless steel with sea water resistance or sewage corrosion, and macromolecule or ceramic material are from the angle of cost with convenient processing; Adopt macromolecular material for well,, need to convert rotational kinetic energy into electric energy through generator earlier if adopt the traditional electrical osmotic technique; Through power control circuit electric energy is converted into the required energy of electrodialysis again, adopts electrodialytic technique of the present invention, omitted first step technology; Simplify second step technology, do not needed generator, do not needed power supply and relevant control circuit; Directly can desalinize seawater or purify waste water through apparatus of the present invention, efficiency of energy utilization is improved, and device structure is able to simplify.

Concrete principle is referring to shown in Figure 1, and 9.1 and 9.2 is south, the arctic of permanent magnet, places the dialysis case 2 that fills with former water between the two poles of the earth, and said former water is exactly seawater or the sewage that needs processing; For preventing that amberplex is contaminated and blocking, need carry out preliminary treatment to former water, comprise filtration, cohesion; Clarification, aeration and chlorination etc., each device of the two sides of casing has an electrode plate 3, battery lead plate 3; Also can design and make with reference to traditional electrical electrode for electrodialysis plate, by the metal of seawater corrosion resistance, like stainless steel, or other conductive materials be processed like graphite; Lead and ruthenic oxide, box house is separated by at least one pair of yin,

yang amberplex

5 and 6, and amberplex has the selection permeability, and promptly cation-exchange membrane only allows cation freely to pass through; Anion-exchange membrane then only allows anion to pass through, and the dividing plate of yin, yang

amberplex

5,6 and support membrane all can adopt traditional electrical osmotic technique material therefor, and its shape should design on request, the arrangement design considered film of exchange membrane and the periodic replacement convenience of dividing plate; As shown in the figure, when permanent magnet 9 produced relative motion with casing, the direction of motion was shown in arrow, and the former water in the casing is as conductor; With cutting magnetic line, magnetic line of force direction is from top to bottom among the figure, thus will produce motional electromotive force E in the former water, by the direction of cutting magnetic line among the figure; The direction that can judge motional electromotive force is from right to left, places the lead 20 outside the magnetic field to couple together two battery lead plate 3 usefulness, and the cation in the then former water is like Na; Ca, metal cations such as Mg will be under the effect of electromotive force E, moves from right to left and passes cation-exchange membrane 6; And anion, like Cl, anion such as carbonate will move and pass anion-exchange membrane 7 from left to right; Thereby in the compartment of centre, the concentration of salt will reduce because of the directional migration of ion, forms between fresh water 23; Then be respectively the enriched chamber of yin, yang ion near two compartments of battery lead plate, promptly between utmost point water 22, the last purpose that reaches desalination between fresh water; Connect resistance 21 among the figure on the lead 20, can avoid producing opposite electromotive force on the lead, offset the former motional electromotive force E of part.

In order to improve desalination efficient, a common moving living electric dialyzator is not to be made up of a pair of yin, yang amberplex, referring to shown in Figure 2; When box house is separated by two pairs of yin, yang

amberplexes

5 and 6, zwitterion moved apart situation in the dialysis case, two pairs of exchange membranes and two battery lead plates are divided into 5 separate rooms with casing; Lead 20 couples together two electrodes, and the 21st, be connected on the resistance on the lead, the moon in the former water; Cation, passes anion and cationic membrane to the right respectively and left movement under the effect of motional electromotive force E, ecto-entad forms between two utmost point water 22 successively; Between two fresh water 23, and between middle dense water 24, with fresh water; Dense water and utmost point water are drawn through outlet pipe 10 respectively, constantly inject former water, desalinization that can continue or sewage purification from water inlet pipe 14 again.

The moving living electrodialysis plant that the present invention relates to is compared structural similarity with all kinds of generators that utilize rotational kinetic energy to generate electricity; The main distinction is to replace producing moving lead winding of giving birth to electric current in the common generator with seawater, and generator has polytype, so the moving electrodialysis machine of giving birth to also can be designed to polytype; Comprise shaft type electrodialysis type or disc type electrodialysis type, embodiment one is referring to Fig. 3, Fig. 4, shown in Figure 5, axially the structural representation of internal rotor-external stator type electrodialysis machine; Said stator 1, dialysis case 2 and rotor 7 all are tubulars, and the three is nested together in proper order, and stator 1 is positioned at outermost layer; Rotor 7 is interior, and permanent magnet 9 sticks on rotor 7 outer surfaces, and the inboard of said rotor 7 and armature spindle 8 connect together; Armature spindle 8 is driven by internal combustion engine or other rotary machine, forms the moving electrodialysis plant of giving birth to of shaft type, and dialysis case 2 sides are battery lead plate 3; Inside is separated out three spaces by a pair of yin, yang

amberplex

5,6, and respectively there are water inlet pipe 14 and outlet pipe 10 in each space, so that the discharge of former water entering and fresh water and utmost point water; Certain spacing between said rotor 7 and the dialysis case 2, so that rotor 7 unhinderedly rotates, the former water in the dialysis case 2 is to the magnetic line of force between cutting rotor 7 and the stator 1; In former water, produce motional electromotive force, two battery lead plates are connected with lead 20, produce the moving electric current of giving birth in the former water; Make yin, yang ion isolation, former water obtain desalination or desalination.

Fig. 4 is the structural representation with dialysis case 2, and dialysis case 2 is that section is circular cylinder, and battery lead plate 3 is circular; Be arranged at two sides of dialysis case 2; Yin,

yang amberplex

5,6 still is circular, and dialysis case 2 is divided into three intervals, the interval that former water is got into separately by three water inlet pipes 14 respectively; Connecing through each interval outlet pipe discharge respectively, lead 20 connects two battery lead plates 3.

Fig. 5 is the generalized section perpendicular to axial direction that is positioned at the fresh water district that is separated out in the middle part of the dialysis case, and former water gets into from the top, and fresh water is discharged from the below; Former water is in this interval process of flowing, and contained zwitterion is separated gradually, so be that zwitterion content is higher near the former water salt content of top import department; Near the exit, lower end, salt content is low more more, wherein water inlet pipe 14 and outlet pipe 10 maximum stream flows; The rotating speed that depends on rotor; The permanent magnet magnetic field intensity, dialysis case size, factors such as the horizontal harmonizing yinyang ion-exchange of entire machine design film quality.

Similar with said structure is the moving electrodialysis machine of giving birth to of axial inner stator-outer-rotor type; Its structure only is that rotatable parts are changed into the outside; Be made up of a plurality of permanent magnets and yoke, inside is fixed stator, and the dialysis case is between rotor and stator; Be connected with stator, the structure of dialysis case is constant basically.

Embodiment two is referring to shown in Figure 6, and disc type is moved the electrodialysis machine of giving birth to, and the moving electrodialysis machine of giving birth to of said disc type has structures such as center roller, intermediate stator, multi-disc type; Have only a stator 1 and a rotor 7 among the figure, said stator 1, dialysis case 2 and rotor 7 are disc, and three's axial order is arranged; Stator 1 is connected with bearing block 19 through stator bolster 16, and rotor 7 is connected with bearing block 19 through armature spindle 8, and armature spindle 8 drives rotor 7 through belt 18 and rotates; The south of permanent magnet 9, the arctic 9.1; 9.2 be connected with rotor 7 with stator 1 respectively, form the moving electrodialysis plant of giving birth to of disc type, the dialysis case is positioned among the magnetic field of permanent magnet formation paired on stator and the rotor; When rotor 7 rotated under the drive of belt 18, the former water in the dialysis case produced motional electromotive force because of cutting magnetic line.

Different with embodiment one is, is circular hollow cylinder though the dialysis case in the disc type electrodialysis machine and casing in the shaft type electrodialysis machine all are vertical and axial section, and the position of battery lead plate 3 and yin,

yang amberplex

5,6 is different; Referring to shown in Figure 7, said battery lead plate 3 is respectively interior ring electrode plate and outer ring electrode plate, and yin,

yang amberplex

5,6 is divided into three regional A with casing; B and C, wherein the B district is the fresh water district, and is the same with shaft type electrodialysis machine; Also can adopt many to amberplex; Casing is divided into more multizone, and to raise the efficiency, three water inlet pipes transport former water for respectively three zones; Through flow out ring electrode plate and outer ring electrode plate in lead 20 is used for connecting after handling again through each regional outlet pipe 10.

The fresh water that flows out between said fresh water, must be further after active carbon adsorption and sterilization are handled, could be as drinking water.

A kind of water desalination method of using said moving living electrodialysis plant is positioned over the dialysis case 2 that fills former water in the magnetic field, and described magnetic field producing method comprises the magnet exciting coil that adopts permanent magnet and employing energising generation magnetic field; In the dialysis case, be provided with pair of electrical pole plate 3 and one or more pairs of anion and

cation exchange membranes

5,6, exchange membrane and join and gripper shoe casing is divided into some fresh water, between dense water and utmost point water; These compartments all are provided with water inlet pipe 14 and outlet pipe 10, make that former water can continue to get into fresh water; Dense water and utmost point water can continue to flow out, and two battery lead plates connect through the lead outside the magnetic field 20, let 2 pairs of objects that produce magnetic field of dialysis case do relative motion; Described relative motion producing method comprises: make the dialysis case motionless, let the object of which movement that produces magnetic field, make former water cutting magnetic line; Utilize the rotational kinetic energy of various machines; Directly in former water, produce motional electromotive force, make to form the moving electric current of giving birth in the former water, drive the zwitterion motion; Respectively through the zwitterion film, desalinate or purify former water with the electrodialysis mode.

Said former water comprises seawater, bitter, the surface water, underground water, running water, various industry or sanitary sewage, and said machine comprises the rotary machine that the mechanical, electrical motivation of various heat, steam engine, steam turbine, wind-driven generator, tital generator, the hydraulic turbine or natural energy resources drive; Said machine carries out speedup or deceleration through using gear-box to the rotating speed of machine; Through the rotation direction of regular change machine or machinery, the outlet pipe with dense water or utmost point water and fresh water switches simultaneously, reaches the conversion sense of current; Lower polarity effect, aim of stable operation.

Among the present invention; If magnetic field intensity and former water resistance are confirmed, promptly there is a limit speed, if rotor rotation surpasses this speed; With producing serious polarization phenomena; So should control rotating speed within the specific limits, former water and water outlet need be supplied with through water pump, and water pump operating pressure scope is 0.1-3.0kg/cm ²About, moving voltage and current and the multiple parameter correlation that produces in the dialysis case of giving birth to, general range is: 1-300V, 0.1-10A is converted into power consumption, power consumption about 0.1-the 10 degree/tons of the present invention's technology.But because free power supply such as idle maneuver energy of available heat machine and wind energy is still very energy-conservation.

The present invention adopts permanent magnet to produce the required magnetic field of motional electromotive force, can make designs simplification, especially adopts magnetic field strong; The rare earth permanent-magnetic material that volume is little (like neodymium iron boron magnetic body) can significantly be raised the efficiency, but this type material price is higher at present; So from the cost angle, also can adopt magnet exciting coil to produce magnetic field, though structure is complicated slightly; But control easily, the moment of resistance when especially starting can be reduced to appropriate level, and the electrodialysis machine can be started fast.

When adopting permanent magnet; For reducing the resistance of start, can adopt the mark number of magnetic poles relation between stator and the rotor, because magnetic pole of on rotor, pasting and magnetic pole of the stator are fully neatly at once; The magnetic line of force has the shortest magnetic circuit; Rotor can make very difficulty (so the starting reactance square has also just become the important parameter of magneto) of electrodialysis machine starting with powerful attraction between stator, just can reduce the starting reactance square preferably and adopt the mark pole pair to design, in addition; The permanent magnet number be can also reduce, manufacture difficulty and cost reduced.

When if the rotating speed of internal combustion engine or other rotary machines is not suitable for the electrodialysis machine, can use gear-box to carry out speedup or deceleration, the manufacturing of the gear-box that speed change is little and maintenance are all more convenient, and cost is also cheap relatively.

Often need switch electrode in the conventional electric dialyzator running, the manually operated cycle of switching is generally 2 ~ 24h, and operation is generally 15-30min (be called frequently pole-reversing electroosmosis, note is made EDR) automatically.When electrodialysis moves by the EDR mode, in the time of the auto switching polarity of electrode, switch automatically, realize the exchange between dense hydroecium and the freshwater room through valve.EDR has the following advantages: the dirty thing that the female die surface place produces in 1. automatic anode purge chamber and the freshwater room; 2. alleviate the concentration polarization of electrode.Whenever switch one-time electrode polarity, detention layer intermediate ion peak concentration is just once cut down, thereby has suppressed detention layer intermediate ion concentration excessive increase; 3. the initial crystal grain that generates on control cathode chamber and the dense hydroecium female die surface, the conversion of just adhering to because of polarity of electrode is washed away by current having little time to grow up; 4. the glutinous mud accumulation of avoiding the motion of electrically charged colloid and microorganism to produce is frequently switched with the sense of current, has reduced the probability that they adhere at face; 5. stable, the cleaning frequency prolongs.

Among the present invention, EDR is easier to realize, only needs regularly to change the rotor rotation direction, simultaneously different water outlets is switched and can be achieved the goal.

Claims

1. the moving electrodialysis plant of giving birth to comprises stator (1), rotor (7) and dialysis case (2), it is characterized in that: form magnetic field between said stator (1) and the rotor (7); Said dialysis case (2) is arranged in magnetic field; And fixing with stator (1), the both sides of said dialysis case (2) respectively are connected with an electrode plate (3), and dialysis case (2) is inner to separate to become at least three spaces by at least one pair of yin, yang amberplex (5), (6); Both sides be (22) between utmost point water; Middle is (23) between fresh water, and each top and bottom, space respectively is provided with water inlet pipe (14) and outlet pipe (10), connects a lead (20) between two electrode plate.

2. moving living electrodialysis plant according to claim 1 is characterized in that: said magnetic field is the magnetic field of adopting the magnetic field of permanent magnet (9) generation or adopting the energising magnet exciting coil to produce.

3. moving living electrodialysis plant according to claim 2 is characterized in that: said stator (1), dialysis case (2) and rotor (7) all are tubulars, and the three is nested together in proper order; Stator (1) is positioned at outermost layer; Rotor (7) is interior, and permanent magnet (9) sticks on rotor (7) outer surface, and the inboard of said rotor (7) and armature spindle (8) connect together; Armature spindle (8) is driven by internal combustion engine or other rotary machine, forms the moving electrodialysis plant of giving birth to of shaft type.

4. moving living electrodialysis plant according to claim 3 is characterized in that: between said rotor (7) and the dialysis case (2) spacing is arranged.

5. moving living electrodialysis plant according to claim 2; It is characterized in that: said stator (1), dialysis case (2) and rotor (7) are disc; Three's axial order is arranged; Stator (1) is connected with bearing block (19) through stator bolster (16), and rotor (7) is connected with bearing block (19) through armature spindle (8), and armature spindle (8) drives rotor (7) through belt (18) and rotates; The south of permanent magnet (9), the arctic (9.1), (9.2) are connected with rotor (7) with stator (1) respectively, form the moving electrodialysis plant of giving birth to of disc type.

6. according to claim 4 or 5 described moving living electrodialysis plants; It is characterized in that: said box house separates five spaces by two pairs of yin, yang amberplexes; Ecto-entad is followed successively by between two utmost point water (22), between two fresh water (23), and between middle dense water (24).

7. moving living electrodialysis plant according to claim 6 is characterized in that: said lead (a 20) series connection resistance (21).

8. an application rights requires the water desalination method of any said moving living electrodialysis plant of 1-7, and it is characterized in that: the dialysis case (2) that will fill former water is positioned in the magnetic field, and described magnetic field producing method comprises and adopts permanent magnet and adopt energising to produce the magnet exciting coil in magnetic field; In the dialysis case, be provided with pair of electrical pole plate (3) and one or more pairs of anion and cation exchange membrane (5), (6), exchange membrane and join and gripper shoe casing is divided into some fresh water, between dense water and utmost point water; These compartments all are provided with water inlet pipe (14) and outlet pipe (10), make that former water can continue to get into fresh water; Dense water and utmost point water can continue to flow out, and two battery lead plates connect through the lead (20) outside the magnetic field, let dialysis case (2) that the object that produces magnetic field is done relative motion; Described relative motion producing method comprises: make the dialysis case motionless, let the object of which movement that produces magnetic field, make former water cutting magnetic line; Utilize the rotational kinetic energy of various machines; Directly in former water, produce motional electromotive force, make to form the moving electric current of giving birth in the former water, drive the zwitterion motion; Respectively through the zwitterion film, desalinate or purify former water with the electrodialysis mode.

9. water desalination method according to claim 8 is characterized in that: said former water comprises seawater, bitter, the surface water, underground water, running water, various industry or sanitary sewage.

10. water desalination method according to claim 8 is characterized in that: said machine comprises the rotary machine that the mechanical, electrical motivation of various heat, steam engine, steam turbine, wind-driven generator, tital generator, the hydraulic turbine or natural energy resources drive; Said machine carries out speedup or deceleration through using gear-box to the rotating speed of machine; Through the rotation direction of regular change machine or machinery, the outlet pipe with dense water or utmost point water and fresh water switches simultaneously, reaches the conversion sense of current; Lower polarity effect, aim of stable operation.