CN2244046Y

CN2244046Y - High efficient micro electrodialysis desalting device for brackish water

Info

Publication number: CN2244046Y
Application number: CN 96200200
Authority: CN
Inventors: 谭士滨
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-01-05
Filing date: 1996-01-05
Publication date: 1997-01-01
Anticipated expiration: 2006-01-05

Abstract

The utility model relates to a high efficient miniature electrodialysis desalting device for brackish water, which is composed of an electrical control part, a water pretreating part, and a desalting part. The desalting part are installed in sections according to grades; negative ion and positive ion exchanging films and concentrated water (fresh water) partition plates are stacked together in a layered mode; a pole plate made of stainless steel is provided with a pole water partition plate at a position adjacent to a film stack; the concentrated water (fresh water) partition plates are arranged between the negative ion and positive ion exchanging films; plane water passages of the partition plates are in a snake shape, so that desalting processes are increased efficiently; the heads and the tails of the snake-shaped water passages are adjacent to side water through holes; after the stacking of a plurality of layers, the through holes form a water collecting hole passage to realize pole water distribution to a plurality of pipes. The utility model distributes water in the inner part without using outer pipes and belongs to an ideal domestic desalting device with the advantages of small volume, low cost, high water producing rate and desalting rate, and power consumption saving.

Description

Efficient mini electrodialysis brackish water demineralizer

The utility model relates to a kind of water treatment device, is the isolated plant that the salt in the brackish water is removed with electrodialytic method.

Utilize electrodialytic technique that brackish water or sea water desaltination are become tap water, in industrial widespread use, this to water quality of improving water factory, prevent that aspect such as gyp from plaing a part original.But China is vast in territory, the differences such as size of geographical environment, water quality, economic conditions and resident colony, and the industrial electrodialytic desalting device of large volume is difficult to fully under wayly, and the home-use demineralizer of the miniaturization of still needing is as a kind of requisite replenish.This miniaturization realizes by dwindling relatively of each member profile size absolutely not, but change the structure of the core component dividing plate in it, make the useful area and the desalination flow process length of desalination be in best proportioning state, polarity water in again outer polarity water being changed into has been got rid of many Outer Tubes and electrode water distribution frame is realized.

As home-use water treatment device, China is at the cleansing phase that still is at present absorption or filtering type, and various cleaners competitively come out, but they all do not have the function of effective desalination, reduction hardness.

The purpose of this utility model is to overcome the above-mentioned weak point of prior art, and design a kind of by changing diaphragm structure, changing utmost point water configuration structure and mode, make electrodialysis more reasonable, when reaching miniaturization, reducing cost, be beneficial to family and apply, its water production rate, ratio of desalinization, current consumption reach the efficient mini electrodialysis brackish water demineralizer of standard-required.

The purpose of this utility model can realize by following measure: it is by electric control portion, water pretreatment portion and desalination portion form, desalination portion installs by the level segmentation, anion and cation exchange membrane and dense (light) water dividing plate replace the stratiform closed assembly, every grade of outermost is a stainless steel polar plate, behind the closed assemblies at different levels, the outside of its integral body is by the fastening location of clamping plate, Inlet and outlet water (be dispensing water and catchment) interface is arranged on the clamping plate, stainless steel polar plate has utmost point water dividing plate by membrane stack one side, its plane waterway is the snakelike waterway that helps increasing flow process, this water channel one end nearby has three water through holes, one of them is a utmost point water through hole, two is dense (light) water through hole in addition, the other end has only a utmost point water through hole, there is draw to link to each other between utmost point water through hole and the snakelike waterway, the plane waterway of dense (light) water dividing plate also is the snakelike waterway that helps increasing the desalination flow process, respectively there are three water through holes on its head and afterbody side, one of them is a utmost point water through hole, in addition two is dense (light) water through hole, has draw to link to each other between hole among the latter and this snakelike waterway.

Fig. 1 is the utility model technical process and structural representation.

Fig. 2 replaces the installation site graph of a relation for pole plate, dividing plate, ion-exchange membrane at different levels.

Fig. 3 is a brackish water electrodialysis schematic diagram.

Fig. 4 is dense (light) water diaphragm structure synoptic diagram.

Fig. 5 is a utmost point water diaphragm structure synoptic diagram.

The utility model is described in detail below in conjunction with accompanying drawing: whole demineralizer can have individual shell, and each parts, relevant instrument, Outer Tube etc. all are installed on it.Electric control portion comprises bridge rectifier, and it becomes direct current with interchange, and transformer is reduced to rationally the voltage of safety again with voltage, and transfer switch is changed the positive and negative electrode of battery lead plate as required, also has safety fuse, pilot lamp etc. all can continue to use original technology; Water pretreatment portion mainly contains variable valve, tensimeter, strainer etc., also can adopt original technology, does not give unnecessary details for this reason.Be favourable understanding to problem, be necessary to sketch the electrodialysis principle of brackish water: electrodialysis is under the DC electric field effect, utilize the yin, yang ion-exchange membrane that yin, yang ionic in the aqueous solution is selected to see through characteristic, make the solute and the directed isolating physical and chemical processes of solvent that are ionic condition in the aqueous solution.As shown in Figure 3, when brackish water passes through yin, yang ion-exchange membrane 5 and 7, dense (light) water dividing plate 11 and 12 is the stratiform closed assembly alternately, and electrode is set at two ends forms electrodialysis compartment 6 and at 8 o'clock, and DC electric field makes the ion directional migration, the migration of negatively charged ion anode, positively charged ion is to cathodic migration, and the selection because of ion-exchange membrane sees through characteristic again, and anion-exchange membrane can only pass through negatively charged ion, cationic exchange membrane can only pass through positively charged ion (hereinafter to be referred as cavity block and anode membrane), takes Nacl to be dissociated into Na ⁺And cl ^-Make example, then the cl in the freshwater room ^-Ghandler motion sees through cavity block 7 and enters dense hydroecium 14, Na on the sunny side ⁺Move to negative electrode, see through anode membrane 5 and enter dense hydroecium 14, and the Na in the dense hydroecium ⁺And cl ^-Though under the direct current effect, the trend of the electrode migration of the opposite electricity of oriented its band is subjected to stopping of compartment both sides negative and positive film and stays in the chamber.Then dense hydroecium 14 constantly entering because of zwitterion, another pointing out do not gone and more and more denseer, freshwater room 13 is more and more lighter on the contrary, water through

hole

4 and 9 by every dividing plate 10 and 11 edges is (behind the stratiform closed assembly, each hole just is linked as the duct of catchmenting), respectively the current of each deep or light water compartment are compiled and draw, just produce desalination (light) water and dense water.Therefore electric control portion can pass through transfer switch, adjusts the positive and negative of electrode as required, and then former dense hydroecium just can be changed into freshwater room, and former freshwater room also just becomes dense hydroecium, and its dividing plate 12 and 11 also becomes and is " general " dividing plate, both can make dense water dividing plate, also can make diluted gasket.Home-use demineralizer must considered miniaturization, simultaneously cheaply, guarantee good water production rate and ratio of desalinization, this just has a proportioning problem how to resolve effective desalination area and lengthening desalination flow process, this puts us and becomes snakelike waterway 15 to set about from dense (light) water dividing plate 11 with 12 plane waterway punching out, so-called " snakelike " is multilayer S shape trend, certainly for reaching " lengthening desalination flow process " purpose, also can select by mind-set periphery multilayer garden, garden cast, volution trend etc., consider from the support effect between easy to make, the water channel, snakelike still belong to preferential.The appearance of this snakelike plane water channel has changed the runner of being accustomed to continuing to use fully and has filled out net formula diaphragm structure.In addition, behind the stainless steel electrode 3 logical upward direct currents, just produced redox reaction, make and produce some gases and precipitation in the utmost point water, they should discharge in good time, so that independent and the incoherent utmost point water system of dense (light) water should be arranged, this employing Outer Tube of past, the water distribution frame of every cube electrode independently supplies utmost point water.The utility model adopts every block of stainless steel electrode plate 3 by membrane stack one side a utmost point water dividing plate 10 to be arranged, its plane waterway also is snakelike waterway 15, three water through holes of water channel one end, one of them is a utmost point water through hole 4, two is dense (light) water through hole 9 in addition, the other end has only a utmost point water through hole 4, and has draw 16 to link to each other between utmost point water through hole and the snakelike waterway 15.Setting up and its constructional feature of this utmost point water dividing plate makes outer polarity water change interior polarity water into, discards many peripheral hardware pipelines, also omitted the water distribution frame of every electrode plate, and volume is little, and cost of manufacture is low, and production and installation are all more convenient.Behind the alternately stratiform closed assemblies at different levels, the outside of its integral body is by clamping plate 2 fastening location, and Inlet and outlet water (be dispensing water with catchment) interface 1 is installed on the clamping plate 2.

Also it should be noted that as if the words of this demineralizer by eight sections installations of level Four, should have five stainless steel polar plates 3, every pole plate leans on a side of membrane stack that a utmost point water dividing plate 10 is all arranged, totally eight, every 40 pairs of films, the duct of water-in can be called the dispensing water duct, the water outlet duct is the duct of catchmenting, and middle a large amount of duct is dense water or fresh water duct 9.

It is little, cheap that the utility model has volume compared to existing technology, gives birth to Produce and easy for installation, aquifer yield and salt rejection rate height, the advantage such as power consumption is little, especially suitable Apply in the front yard of the whole family.

Claims

1. efficient mini electrodialysis brackish water demineralizer, by electric control portion, water pretreatment portion and desalination portion form, desalination portion installs by the level segmentation, cloudy, cationic exchange membrane (5,7) with dense (light) water dividing plate (11,12) replace the stratiform closed assembly, every grade of outermost is stainless steel polar plate (3), behind the closed assemblies at different levels, the outside of its integral body is by the fastening location of clamping plate (2), Inlet and outlet water interface (1) is installed on the clamping plate (2), it is characterized in that stainless steel polar plate (3) has utmost point water dividing plate (10) by a side of membrane stack, its plane waterway is the snakelike waterway (15) that helps increasing flow process, one end of this water channel (15) nearby has three water through holes, one of them is a utmost point water through hole (4), two is dense (light) water through hole (9) in addition, the other end has only a utmost point water through hole, there is draw (16) to link to each other between utmost point water through hole (4) and the snakelike waterway, dense (light) water dividing plate (11,12) plane waterway also is the snakelike waterway (15) that helps increasing the desalination flow process, respectively there are three water through holes on its head and afterbody side, one of them is a utmost point water through hole (4), in addition two is dense (light) water through hole (9), has draw (16) to link to each other between hole among the latter and this snakelike waterway.