CN2839253Y - Rolling electric desalting device with variable resin filling ratio - Google Patents
Rolling electric desalting device with variable resin filling ratio Download PDFInfo
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- CN2839253Y CN2839253Y CN 200520013331 CN200520013331U CN2839253Y CN 2839253 Y CN2839253 Y CN 2839253Y CN 200520013331 CN200520013331 CN 200520013331 CN 200520013331 U CN200520013331 U CN 200520013331U CN 2839253 Y CN2839253 Y CN 2839253Y
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- anion
- cation exchange
- exchange resin
- fresh water
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Abstract
The utility model relates to an electric rolling desalter assembly, particularly an electric rolling desalter assembly with different design compounding ratios of ion exchange material. The utility model comprises a central pipe used as one pole of an electrode and a casing which is concentric with the central pipe, wherein the casing is provided with the other pole of the electrode, a plurality of anion exchange membranes and cation exchange membranes are alternately arranged between the central pipe and the casing, and a concentrated water channel and a fresh water channel are partitioned by the anion exchange membranes and cation exchange membranes; the anion exchange membranes and cation exchange membranes are rolled into a circular cylinder by using the center pipe as the center, the fresh water channel is provided with anion and cation exchange resin, the fresh water channel is divided into a plurality of sections from the water inlet end and the water outlet end, and the proportions of the anion and cation exchange resin arranged in the sections are different. The utility model has the advantages that the desalting efficiency of the device can be improved, and the cost is low.
Description
Technical field
The utility model relates to a kind of roll type electric salt eliminator component element, relates in particular to a kind of rolling electricity desalination assembly with different ion-exchange material design proportionings.
Background technology
The electricity desalting process is under the effect of DC electric field and electroactive medium, make contained ion generation directional migration in the liquid, utilize the selection perviousness of anion and cation exchange membrane simultaneously to zwitterion in the solution, make ion transfer to another kind of solution, thereby reach the membrane sepn process of desalination purpose from a kind of solution.
The electricity desalination plant generally comprises positive and negative electrode, the anion and cation exchange membrane of alternately arranging between positive and negative electrode, and the electrode vessel, dense hydroecium and the freshwater room that constitute thus.Pending former water enters freshwater room, and under the effect of ion exchange resin and electric current, the charged ion in the water is anode and cathode direction migration respectively, and positively charged ion moves to cathode direction, enters into dense hydroecium by cationic exchange membrane from freshwater room.Similarly, electronegative ion anode direction migration enters into dense hydroecium by anion-exchange membrane from freshwater room, thereby reaches the purpose of water in the purifying freshwater room.
From the principle analysis of electric desalination, positively charged ion of every migration in the aqueous solution, must be corresponding to move a negatively charged ion, to keep the electric neutrality of the aqueous solution.Electric current is moved by the yin, yang ionic and carries in the aqueous solution.Generally all be filled with ion exchange resin in the freshwater room of electric salt eliminator component element, salt ion in the water is at first by resin absorption, under the effect of electrical forces, utilize resin then as migrating channels, to two electrode direction migrations, its migrate attribute and the ion migration pattern in water differs widely respectively.Resin has played the effect of ionophore and carrier, fact proved, the filling of resin has obviously improved current efficiency.The speed of various ion migration has nothing in common with each other in the water, strong electrolyte ionic rate of migration much larger than light current from electrolyte ion.In the EDI assembly, it at first is that high valence ion is deviate from that various ionic are deviate from order, secondly is at a low price easily to deviate from ion to be deviate from, and is weak ionization ion and the hydrogen ion and the hydroxide ion that are generated by water-splitting at last.Wherein weak ionization ion mainly is electronegative ions such as bicarbonate ion, carbanion, organosilicon and boron.In addition, all can dissolve partial CO 2 in the general water, and carbonic acid gas can be transformed into bicarbonate ion and carbanion under certain pH value, carbonic acid gas, the ratio of bicarbonate ion and carbanion depends on the pH value height of water.So, owing to carbon dioxide dissolved makes the negative ion quantity in the water increase, promptly in the electric salt eliminator component element demineralising process, increased the load that removes to negative ion.
Therefore, in existing electric desalination plant, often satisfy removing requirement to weak ionization is anionic by the loading level that strengthens anionite-exchange resin.For example U.S. Pat 5316637 is mentioned, and in order to improve anionic diffusive migration effect, the packing ratio of anion-cation exchange resin should be 70% to 30% in the EDI system, or adopts the negative resin of high-crosslinking-degree.In U.S. Pat 5154809, mentioned balance too for the decreasing ratio that keeps zwitterion, the ratio of the anion-cation exchange resin of being filled is designed to 60% to 40%.In " evenly resin is alternately filled electrodeionization water-purifying device " that Chinese patent 01257293.4 is provided, interior anion and cation exchange resin is alternately filled in 2: 1 ratio in the freshwater room.And in U.S. Patent Publication US2004/0178075A, in order to improve the removal effect of weak electrolytes such as silicon, boron in the former water, the packing ratio that will be filled in the anion-cation exchange resin in freshwater room or the dense hydroecium especially was increased to 8: 2.
The EDI assembly various ionic are removed Analysis on Mechanism as can be known from above-mentioned, it is orderly that ion removes, and the dense ionization ion generally promptly takes the lead in being removed at the feed-water end of EDI device, and general needed electric current is also lower; And light current is from the property ion, and especially weak ionized negatively charged ion is difficult for removing most, and often the water side that will promptly install at the end of runner just can remove, and needed current ratio is higher.Experiment showed, that light current is to influence EDI to produce one of main restricting factor of water water quality from the property negatively charged ion.By strengthening the loading level of anionite-exchange resin, the EDI assembly can be strengthened to the anionic ability of removing of weak ionization, but the order that ion removes can not be changed, promptly the dense ionization ion is removed earlier, and is removed behind the weak ionized negatively charged ion.Therefore, improve anionite-exchange resin and add ratio, also mainly be to work in the water side of EDI assembly, and not only can not improve the desalting performance of assembly at the assembly feed-water end, because Zeo-karb adds the relative reduction of ratio, make assembly descend to some extent on the contrary to cationic removal ability.In addition, the price of anionite-exchange resin generally is 1.5 times of Zeo-karb, if all being high anionite-exchange resin, the hybrid resin that whole assembly adds fills ratio, because whole resin is filled and is all adopted a ratio (as shown in Figure 1), will increase the manufacturing cost of EDI device greatly.
Summary of the invention
It is more reasonable that the utility model mainly provides a kind of anion-cation exchange resin filling proportioning, make full use of the mechanism that removes of each foreign ion in the water of EDI device Central Plains, improve the desalting efficiency of device, especially improve light current from the anionic removal efficiency of property, thereby improve the rolling electricity desalination assembly that EDI produces water water quality; Solve the too high technical problem of existing in prior technology EDI device manufacturing cost.
Above-mentioned technical problem of the present utility model is mainly solved by following technical proposals: the rolling electric salt remover that a kind of resin filling ratio changes, comprise as the pipe core of electrode one utmost point and with its concentric shell, shell is provided with another utmost point of electrode, between pipe core and shell, be provided with some anion and cation exchange membranes of alternately arranging, be separated out dense aquaporin and fresh water passage by anion and cation exchange membrane, anion and cation exchange membrane is that the center rolls into right cylinder with the pipe core, be filled with anion-cation exchange resin in the fresh water passage, is divided into plurality of sections by feed-water end to the water side in the fresh water passage, fills the anion-cation exchange resin of different ratios in every section respectively.The assembly freshwater room is divided into plurality of sections along the fresh water flow direction, all is added with mixture iron exchange resin in each section, but the anion-cation exchange resin ratio of each section mixture iron exchange resin (ion-exchange capacity by them is calculated) difference.Because it is orderly that ionic removes, dense ionization shape ion is generally taken the lead in removing at the device inlet segment, and the weakness ion difficulty remove, according to the proportioning ratio of the anion-cation exchange resin of this rule design, just in time meet ionic and removed rule, more helped removing ion.Owing to the anion-cation exchange resin ratio of the mixture iron exchange resin that adds at the assembly feed-water end is relatively low, the anion-cation exchange resin of height ratio is added in contrast in whole assembly, and the former anionite-exchange resin addition is low.
Certainly, each section of anion-cation exchange resin proportioning of the mixture iron exchange resin that described assembly freshwater room adds can improve gradually from the fresh water water outlet direction of intaking, also mixed-arrangement according to certain rules.
The filling ratio of anion-cation exchange resin improves to assembly fresh water water side gradually from the fresh water feed-water end of assembly.Because the easiest the removing of forceful electric power daughter ion, the ratio of the anion-cation exchange resin of filling at feed-water end is less relatively; Constantly remove the light current ion along water (flow) direction, the ratio of the anion-cation exchange resin of being filled also will relatively and then improve constantly, so that improve the anionic removal efficiency of light current of assembly.
As preferably, described dense, fresh water interchannel is provided with the net dividing plate.
As preferably, be filled with anion-cation exchange resin in the dense aquaporin, is divided into plurality of sections by feed-water end to the water side in the dense aquaporin, the ratio of the anion-cation exchange resin of filling improves gradually in every section.Fill anion-cation exchange resin in the dense aquaporin and can improve the product quality.
As preferably, be divided into the 2-10 section along what water flowed direction in assembly fresh water passage and the dense aquaporin.The anion-cation exchange resin of fresh water channel direction is one section one section filling, and one section filling ratio of close water side is the highest, successively decreases successively then, and the filling ratio changes 2-10 time.The number of times that the ratio of filling changes is to determine that according to the light current ionic kind that will remove light current ionic kind is many, and the number of times that the ratio of filling changes is also many.The ion of dense aquaporin is filled the identical of rule and fresh water passage.
As preferably, described fresh water passage is different with the anion-cation exchange resin packing height of each section in the dense aquaporin, and the proportioning of the filling of each section is 0.5: 1-5.0: change in 1.
Described assembly freshwater room can be divided into plurality of sections along the fresh water flow direction, and is also can every section highly inequality.The size of the height of filling depends on will remove the ionic complexity.
Therefore, the utlity model has the anion-cation exchange resin reasonable ratio of the mixture iron exchange resin of ED worker's assembly freshwater room interpolation, it is strong to remove the weak anionic ability of removing of ionization, and the ED frock is put the characteristics of low cost of manufacture.
Description of drawings:
Accompanying drawing 1 is the filling synoptic diagram of anion-cation exchange resin of the electric salt eliminator component element of prior art.Wherein (a) fills by the anion-cation exchange resin mass ratio at 1: 1, (b) fills at 1: 1.5 by the anion-cation exchange resin mass ratio.
Accompanying drawing 2 is filling synoptic diagram of the anion-cation exchange resin of roll type electric salt eliminator component element of the present utility model.Wherein (c) feed-water end anion-cation exchange resin mass ratio is 0.5: 1, and water side anion-cation exchange resin mass ratio is 1.5: 1; (d) first section anion-cation exchange resin mass ratio is 0.5: 1, and second section is 1.5: 1, and the 3rd section is 2.5: 1.
Accompanying drawing 3 is one-piece construction synoptic diagram of roll type electric salt eliminator component element of the present utility model.
The concrete example of implementing:
Below by embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment 1:
As accompanying drawing 2 (c) with shown in 3, roll type electric salt eliminator component element is the axle center with pipe core 1, and with its anode as electrode, shell 2 concentric with it is as the negative electrode of electrode, and two electrodes are provided with direct supply; Be furnished with outside pipe core 1 that several are dense, the fresh water runner, the net dividing plate regulating YIN and YANG ion-exchange membrane 3 dense, that the fresh water interchannel is equipped with is filled with ion exchange resin 4 in the fresh water passage.Roll type electric salt eliminator component element is divided into two sections carries out the resin can, it is 0.5: 1 that anion-cation exchange resin 4 ratios of feed-water end 5 transfer to, it is 1.5: 1 that anion-cation exchange resin 4 ratios of water side 6 transfer to, and the ratio of whole like this assembly anion-cation exchange resin 4 still is 1: 1.Experimental results show that, adopt 1: 1 canning means of anion-cation exchange resin to compare by adjusting the back assembly with original whole assembly, under the prerequisite that does not change anion-cation exchange resin can amount, both kept in original good desalting performance, again the ability that removes of weak electrolytes such as silicon, boron, carbonic acid gas is obviously strengthened: at the sodium bicarbonate of intaking with 18-20 μ s/cm is background, the pH value is 6 o'clock, normal temperature test is down found, the decreasing ratio of silicon is increased to 88.9% from original 80%, and the extrusion rate of inorganic carbon is up to 99.9%.
Embodiment 2:
As accompanying drawing 2 (d) with shown in 3, roll type electric salt eliminator component element is the axle center with pipe core 1, and with its anode as electrode, shell 2 concentric with it is as the negative electrode of electrode, and two electrodes are provided with direct supply; Be furnished with outside pipe core 1 that several are dense, the fresh water runner, the net dividing plate regulating YIN and YANG ion-exchange membrane 3 dense, that the fresh water interchannel is equipped with is filled with ion exchange resin 4 in the fresh water passage.Roll type electric salt eliminator component element is divided into 3 sections carries out the resin can, first section anion-cation exchange resin 4 ratio near feed-water end are 0.5: 1, it is 1.5: 1 that second section resin ratio transfers to, it is 2.5: 1 that the 3rd section anion-cation exchange resin 4 ratios of close water side transfer to, and the ratio of whole like this assembly anion-cation exchange resin was increased to 1.5: 1.Experimental results show that, adopt 1.5: 1 canning means of anion-cation exchange resin to compare by adjusting the back assembly with original whole assembly, under the prerequisite that does not change anion-cation exchange resin 4 can amounts, when both having kept original good desalting performance, the ability that removes to weak electrolytes such as silicon, boron, carbonic acid gas also has obvious reinforcement, at the sodium bicarbonate of intaking with 18-20 μ s/cm is background, the pH value is 6 o'clock, normal temperature test is down found, the decreasing ratio of silicon is increased to 95.3% from original 91%, and the extrusion rate of inorganic carbon is up to more than 99.9%.
Claims (7)
1. the rolling electric salt remover that changes of a resin filling ratio, comprise as the pipe core (1) of electrode one utmost point and with its concentric shell (2), shell (2) is provided with another utmost point of electrode, between pipe core (1) and shell (2), be provided with some anion and cation exchange membranes (3) of alternately arranging, be separated out dense aquaporin and fresh water passage by anion and cation exchange membrane (3), anion and cation exchange membrane (3) is that the center rolls into right cylinder with pipe core (1), be filled with anion-cation exchange resin (4) in the fresh water passage, it is characterized in that: is divided into plurality of sections by feed-water end to the water side in the fresh water passage, fills the anion-cation exchange resin (4) of different ratios in every section respectively.
2. the rolling electric salt remover that a kind of resin filling ratio according to claim 1 changes is characterized in that: described dense, fresh water interchannel is provided with the net dividing plate.
3. the rolling electric salt remover that a kind of resin filling ratio according to claim 1 and 2 changes, it is characterized in that: be filled with anion-cation exchange resin (4) in the dense aquaporin, is divided into plurality of sections by feed-water end to the water side in the dense aquaporin, fills the anion-cation exchange resin (4) of different ratios in every section respectively.
4. the rolling electric salt remover that a kind of resin filling ratio according to claim 1 and 2 changes is characterized in that: be divided into the 2-10 section along what water flowed direction in assembly fresh water passage and the dense aquaporin.
5. the rolling electric salt remover that a kind of resin filling ratio according to claim 3 changes is characterized in that: be divided into the 2-10 section along what water flowed direction in assembly fresh water passage and the dense aquaporin.
6. the rolling electric salt remover that a kind of resin filling ratio according to claim 1 and 2 changes, it is characterized in that: described fresh water passage is different with anion-cation exchange resin (4) packing height of each section in the dense aquaporin.
7. the rolling electric salt remover that a kind of resin filling ratio according to claim 5 changes, it is characterized in that: described fresh water passage is different with anion-cation exchange resin (4) packing height of each section in the dense aquaporin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520013331 CN2839253Y (en) | 2005-07-19 | 2005-07-19 | Rolling electric desalting device with variable resin filling ratio |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520013331 CN2839253Y (en) | 2005-07-19 | 2005-07-19 | Rolling electric desalting device with variable resin filling ratio |
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| CN2839253Y true CN2839253Y (en) | 2006-11-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200520013331 Expired - Lifetime CN2839253Y (en) | 2005-07-19 | 2005-07-19 | Rolling electric desalting device with variable resin filling ratio |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102079559A (en) * | 2010-11-26 | 2011-06-01 | 浙江大学 | Electrical deionization method and system without enriched chamber |
| CN103373780A (en) * | 2013-05-31 | 2013-10-30 | 福建方明环保科技股份有限公司 | Device and method for purifying drinking water |
| CN104192956A (en) * | 2014-08-15 | 2014-12-10 | 浙江中凯瑞普环境工程股份有限公司 | Roll electric demineralizer |
-
2005
- 2005-07-19 CN CN 200520013331 patent/CN2839253Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102079559A (en) * | 2010-11-26 | 2011-06-01 | 浙江大学 | Electrical deionization method and system without enriched chamber |
| CN102079559B (en) * | 2010-11-26 | 2013-06-05 | 浙江大学 | Electrical deionization method and system without enriched chamber |
| CN103373780A (en) * | 2013-05-31 | 2013-10-30 | 福建方明环保科技股份有限公司 | Device and method for purifying drinking water |
| CN104192956A (en) * | 2014-08-15 | 2014-12-10 | 浙江中凯瑞普环境工程股份有限公司 | Roll electric demineralizer |
| CN104192956B (en) * | 2014-08-15 | 2015-10-28 | 浙江中凯瑞普环境工程股份有限公司 | A kind of coiling type electric salt remover |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150719 Granted publication date: 20061122 |
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| EXPY | Termination of patent right or utility model |