CN113399004A - Ion exchange system for liquid stream treatment - Google Patents
Ion exchange system for liquid stream treatment Download PDFInfo
- Publication number
- CN113399004A CN113399004A CN202010184095.2A CN202010184095A CN113399004A CN 113399004 A CN113399004 A CN 113399004A CN 202010184095 A CN202010184095 A CN 202010184095A CN 113399004 A CN113399004 A CN 113399004A
- Authority
- CN
- China
- Prior art keywords
- ion exchange
- chamber
- resin
- anode
- cathode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005342 ion exchange Methods 0.000 title claims abstract description 166
- 239000007788 liquid Substances 0.000 title claims abstract description 75
- 238000005341 cation exchange Methods 0.000 claims abstract description 53
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 claims abstract description 31
- 238000005349 anion exchange Methods 0.000 claims abstract description 26
- 239000003011 anion exchange membrane Substances 0.000 claims abstract description 24
- 239000012528 membrane Substances 0.000 claims abstract description 24
- 239000003729 cation exchange resin Substances 0.000 claims abstract description 18
- 239000003957 anion exchange resin Substances 0.000 claims abstract description 17
- 150000002500 ions Chemical class 0.000 claims abstract description 14
- 238000011069 regeneration method Methods 0.000 claims description 48
- 230000008929 regeneration Effects 0.000 claims description 44
- 239000011347 resin Substances 0.000 claims description 39
- 229920005989 resin Polymers 0.000 claims description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 24
- 230000005684 electric field Effects 0.000 claims description 19
- 239000003456 ion exchange resin Substances 0.000 claims description 19
- 229920003303 ion-exchange polymer Polymers 0.000 claims description 19
- 230000009471 action Effects 0.000 claims description 15
- 239000012530 fluid Substances 0.000 claims description 15
- 150000001450 anions Chemical class 0.000 claims description 9
- 150000001768 cations Chemical class 0.000 claims description 9
- 238000010494 dissociation reaction Methods 0.000 claims description 5
- 230000005593 dissociations Effects 0.000 claims description 5
- 125000006850 spacer group Chemical group 0.000 claims description 5
- 238000000855 fermentation Methods 0.000 claims description 3
- 230000004151 fermentation Effects 0.000 claims description 3
- 239000010842 industrial wastewater Substances 0.000 claims description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 3
- 238000002386 leaching Methods 0.000 claims description 3
- 239000011707 mineral Substances 0.000 claims description 3
- 239000013535 sea water Substances 0.000 claims description 3
- 239000008399 tap water Substances 0.000 claims description 3
- 235000020679 tap water Nutrition 0.000 claims description 3
- 230000003100 immobilizing effect Effects 0.000 claims 1
- 239000000243 solution Substances 0.000 description 12
- 239000002585 base Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- 239000013043 chemical agent Substances 0.000 description 4
- 238000011033 desalting Methods 0.000 description 4
- 239000003513 alkali Substances 0.000 description 3
- 238000011065 in-situ storage Methods 0.000 description 3
- 229910017053 inorganic salt Inorganic materials 0.000 description 3
- 230000001172 regenerating effect Effects 0.000 description 3
- 239000002455 scale inhibitor Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 238000002242 deionisation method Methods 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229910052770 Uranium Inorganic materials 0.000 description 1
- 239000003242 anti bacterial agent Substances 0.000 description 1
- 229940088710 antibiotic agent Drugs 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000003125 aqueous solvent Substances 0.000 description 1
- 229940023913 cation exchange resins Drugs 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005115 demineralization Methods 0.000 description 1
- 230000002328 demineralizing effect Effects 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- DPGAAOUOSQHIJH-UHFFFAOYSA-N ruthenium titanium Chemical compound [Ti].[Ru] DPGAAOUOSQHIJH-UHFFFAOYSA-N 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- DNYWZCXLKNTFFI-UHFFFAOYSA-N uranium Chemical compound [U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U] DNYWZCXLKNTFFI-UHFFFAOYSA-N 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J47/00—Ion-exchange processes in general; Apparatus therefor
- B01J47/02—Column or bed processes
- B01J47/026—Column or bed processes using columns or beds of different ion exchange materials in series
- B01J47/028—Column or bed processes using columns or beds of different ion exchange materials in series with alternately arranged cationic and anionic exchangers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J49/00—Regeneration or reactivation of ion-exchangers; Apparatus therefor
- B01J49/30—Electrical regeneration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
- C02F2001/422—Treatment of water, waste water, or sewage by ion-exchange using anionic exchangers
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
- C02F2001/425—Treatment of water, waste water, or sewage by ion-exchange using cation exchangers
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses an ion exchange system for extracting or removing ions from a liquid stream to be treated, comprising at least one ion exchange unit, the ion exchange unit comprising: the cathode, the cation exchange membrane, the anion exchange membrane and the anode are sequentially arranged; a cathode chamber located between the cathode and the cation exchange membrane, comprising two openings; an ion exchange chamber located between the cation exchange membrane and the anion exchange membrane, comprising two openings, the ion exchange chamber comprising at least one cation exchange zone and at least one anion exchange zone, filled with a cation exchange resin and an anion exchange resin, respectively; and an anode chamber located between the anion exchange membrane and the anode, comprising two openings.
Description
Technical Field
The present invention relates to the field of ion exchange technology, and is especially one kind of ion exchange system for extracting or eliminating ions from liquid flow.
Background
Ion exchange is one of the methods for extracting or removing ions from a liquid stream using ion exchangers, most commonly ion exchange resins. Currently, ion exchange has been widely used for water purification and softening; desalting seawater and brackish water; refining and decolorizing the solution (such as sugar solution); extracting uranium and rare metals from mineral leaching liquid; extracting antibiotics from fermentation liquor, and recovering noble metals from industrial wastewater.
The ion exchange resin is a high molecular compound with functional groups and a three-dimensional network structure, most of which exist in a granular state, and some of which are made into a fibrous or powdery state and are insoluble in water and common solvents. Ion exchange resins are classified into two major classes, cation exchange resins and anion exchange resins, which can perform ion exchange with cations and anions in a liquid stream, respectively. During ion exchange, cations (e.g. Na) in the liquid stream+,Ca2+,K+,Mg2+,Fe3+Etc.) with H on a cation exchange resin+Exchange is carried out, cations in the liquid stream are transferred to the resin, and H on the resin+Is exchanged into water; anions in liquid streams (e.g. Cl)-，HCO3 -Etc.) with OH on anion exchange resin-Exchange is carried out, anions in the water are transferred to the resin, and OH on the resin-Exchange into a liquid stream, and H+With OH-The water is generated in combination, and the purpose of extracting or removing ions from the liquid flow is achieved.
One of the advantages of the ion exchange method is that the ion exchange resin can be recycled after regeneration, and the common regeneration method is an acid-base chemical regeneration method, wherein an acid solution is used for cleaning the cation exchange resin, an alkali solution is used for cleaning the anion exchange resin, and a concurrent or countercurrent mode is adopted. The acid-base chemical regeneration method has many defects, such as low utilization rate of acid-base for regeneration, environmental pollution caused by discharge of waste acid alkali liquor, complex regeneration operation, safety storage and transportation of acid-base as dangerous chemicals, and poor labor conditions. Researchers have proposed methods for electrically regenerating ion exchange resins, but most of the existing methods for electrically regenerating ion exchange resins require that the ion exchange resins be led out from an ion exchange system to a special regeneration system, and have long downtime and complicated operation.
There is still a need to develop a new ion exchange system for liquid stream treatment with an easy resin regeneration function.
Disclosure of Invention
Aiming at the requirement of simple and convenient operation of ion exchange resin regeneration in the technical field of ion exchange, the invention designs a novel ion exchange system for liquid flow treatment, which can effectively extract or remove ions in liquid flow to be treated, can realize in-situ regeneration of ion exchange resin without using acid-base chemical agents, and is simple and convenient to operate.
An embodiment of the invention relates to an ion exchange system for extracting or removing ions from a liquid stream to be treated, characterized in that the system comprises at least one ion exchange unit, the ion exchange unit comprises: the cathode, the cation exchange membrane, the anion exchange membrane and the anode are sequentially arranged; a cathode chamber located between the cathode and the cation exchange membrane, comprising two openings; an ion exchange chamber located between the cation exchange membrane and the anion exchange membrane and comprising two openings, the ion exchange chamber comprising at least one cation exchange zone and at least one anion exchange zone filled with a cation exchange resin and an anion exchange resin, respectively, the cation exchange zone and the anion exchange zone being spaced apart, the interface of the cation exchange zone and the anion exchange zone being substantially perpendicular to the cation exchange membrane or the anion exchange membrane; and an anode chamber located between the anion exchange membrane and the anode, comprising two openings.
The ion exchange system of the embodiment of the invention has two operating conditions of liquid flow treatment and resin regeneration: under the working condition of liquid flow treatment, liquid flow to be treated flows through the cation resin and the anion resin in the ion exchange chamber to obtain deionized liquid flow; under the working condition of resin regeneration, voltage is applied to the cathode and the anode to form a direct current electric field, and H is generated by water dissociation at the interface of the anion exchange membrane and the cation exchange resin+With OH-，H+Transferring to the cation exchange zone under the action of DC electric field to regenerate the cation exchange resin, OH-Migrating to the anode chamber under the action of DC electric field, the interface of the cation exchange membrane and anion exchange resinDissociation of water to form H+With OH-，H+Transferring to the anion exchange area under the action of a direct current electric field to regenerate the anion exchange resin, OH-And (3) transferring the fluid to be treated to the cathode chamber under the action of a direct current electric field, and simultaneously, flowing the fluid to be treated through the anode chamber and the cathode chamber to obtain a resin regeneration concentrated solution.
When the ion exchange method is used for treating liquid flow, acid and alkali chemical agents are generally used for regenerating the ion exchange resin, so that the ion exchange resin is unsafe, and the ion exchange resin needs to be led out of a treatment system to a special regeneration system for regeneration, so that the operation is complex. The ion exchange system can realize in-situ regeneration of the ion exchange resin, does not use acid-base chemical agents, is a novel practical ion exchange system, and can be widely applied to various occasions needing ion exchange by using the ion exchange resin.
Drawings
The accompanying drawings and the following detailed description are included to assist in understanding the features and advantages of the present invention, in which:
FIG. 1 schematically illustrates a schematic of a fluid treatment regime of an ion exchange unit 100 according to one embodiment of the present invention;
FIG. 2 schematically illustrates a resin regeneration operation of the ion exchange unit 100 according to one embodiment of the present invention;
FIG. 3 schematically illustrates a schematic of a fluid treatment regime of an ion exchange unit 200 according to one embodiment of the present invention;
FIG. 4 schematically illustrates a resin regeneration operation of an ion exchange unit 200 according to an embodiment of the present invention;
FIG. 5 schematically shows a schematic of the flow treatment regime of two ion exchange units 100 in series according to one embodiment of the invention;
FIG. 6 schematically shows a resin regeneration regime schematic for two ion exchange units 100 in series according to one embodiment of the present invention;
FIG. 7 schematically shows a schematic of the flow treatment regime of two ion exchange units 100 in series according to another embodiment of the invention;
fig. 8 schematically shows a resin regeneration scheme for two ion exchange units 100 in series according to another embodiment of the present invention.
Detailed Description
Unless clearly defined otherwise herein, the scientific and technical terms used have the meaning commonly understood by those of skill in the art to which this application pertains. As used in this application, the terms "comprising," "including," "having," or "containing" and similar referents to shall mean that the content of the listed items is within the scope of the listed items or equivalents thereof. The term "or", "or" is not meant to be exclusive, but rather refers to the presence of at least one of the referenced items (e.g., ingredients), and includes the presence of combinations of the referenced items as may be present. Reference throughout this specification to "some embodiments," "some embodiments," and so forth, means that a particular element (e.g., feature, structure, and/or characteristic) described in connection with the invention is included in at least one embodiment described herein, and may or may not be present in other embodiments. In addition, it is to be understood that the described inventive elements may be combined in any suitable manner.
Reference herein to "extracting or removing ions" is to the removal of at least a portion of the ions from a liquid stream to be treated, and it is intended that the extraction be for the purpose of recovering the ions from the liquid stream and the removal be for the purpose of obtaining a purified stream from which the ions have been removed. In some cases, "deionization" or "deionization" is also referred to as "desalination" or "demineralization".
Reference herein to "liquid stream" includes various fluids in the liquid state, for example: an aqueous solution comprising salts in an ionic state, including anions and cations in various valence states, or a liquid comprising a non-aqueous solvent. By way of example, the liquid stream to be treated in the embodiments of the present application includes one or more of tap water, seawater, brackish water, industrial wastewater, sugar liquor, mineral leaching liquor, and fermentation liquor.
The first stage, the previous stage and the next stage mentioned in the application refer to that in a system with ion exchange units connected in series, each ion exchange unit is a first stage, under the working condition of liquid flow treatment, according to the flowing direction of liquid flow to be treated, the first flowing ion exchange unit is marked as a first stage ion exchange unit, the first flowing ion exchange unit is marked as a previous stage, and the later flowing ion exchange unit is marked as a next stage.
Fig. 1 and 2 show a schematic view of an ion exchange unit 100 according to one embodiment of the present invention. The ion exchange unit 100 includes a cathode 101, a cation exchange membrane 103, an anion exchange membrane 104, and an anode 102, which are arranged in this order. The ion exchange unit 100 further comprises: a cathode chamber 111, an ion exchange chamber 110 and an anode chamber 112, wherein the cathode chamber 111 is positioned between the cathode 101 and the cation exchange membrane 103 and comprises two openings; the anode chamber 112 is located between the anion exchange membrane 104 and the anode 102, and includes two openings; the ion exchange chamber 110 is located between the cation exchange membrane 103 and the anion exchange membrane 104 and comprises two openings, the ion exchange chamber 110 comprises a cation exchange area 113 and an anion exchange area 114, which are respectively filled with cation exchange resin and anion exchange resin, and the filling amount of the cation exchange resin and the anion exchange resin can be adjusted according to the content of anions and cations in the liquid flow to be treated. Wherein the interface of the cation exchange zone 113 and the anion exchange zone 114 is substantially perpendicular to the cation exchange membrane 103 or the anion exchange membrane 104. Here, "substantially" means that it is not required that the interface between the cation exchange zone 113 and the anion exchange zone 114 form an angle of 90 degrees with the cation exchange membrane 103 or the anion exchange membrane 104, and the angle may be in a certain range, for example, 80 degrees to 100 degrees. Preferably, the cathode 101, the cation exchange membrane 103, the anion exchange membrane 104 and the anode 102 are arranged in parallel, and the interface of the cation exchange zone 113 and the anion exchange zone 114 is perpendicular to the parallel planes.
In some embodiments of the present invention, the cathode 101 may be a metal plate (e.g., iron plate) or a conductive graphite plate, and the anode 102 may be a ruthenium-titanium plate or a graphite plate.
In order to allow the ion exchange chamber 110 to be filled with the cation exchange resin and the anion exchange resin in layers, the ion exchange unit 100 further comprises at least one spacer mesh located inside the ion exchange chamber, said spacer mesh allowing the liquid stream and the ions in the liquid stream to permeate therethrough for fixing the ion exchange resin and/or separating said cation exchange zone and said cation exchange zone. The separation net can be a plastic net with the pore diameter smaller than the particle size of the ion exchange resin, and can also be made of non-woven fabric materials. When the cation exchange zone 113 and the anion exchange zone 114 are separated by a spacer grid in between, the spacer grid is preferably substantially perpendicular to the cation exchange membrane 103 or the anion exchange membrane 104.
As described above, the cathode chamber 111, the ion exchange chamber 110, and the anode chamber 112 of the ion exchange unit 100 each have two openings, and one or more of these openings may serve as a liquid stream inlet or outlet, and two or more of these openings may communicate with each other, as required by various operating conditions.
Embodiments of the present invention include an ion exchange system comprising ion exchange unit 100 having two conditions for fluid treatment and resin regeneration. As shown in fig. 1, in the liquid flow treatment condition, the liquid flow to be treated (indicated by arrows) flows through the cation exchange region 113 and the anion exchange region 114 in the ion exchange chamber 110 in sequence to obtain the deionized liquid flow, and in the liquid flow treatment condition, no voltage is applied to the cathode 101 and the anode 102. As shown in FIG. 2, under the condition of resin regeneration, a voltage is applied to the cathode 101 and the anode 102 to form a DC electric field, and H is generated by water dissociation at the interface of the anion exchange membrane 104 and the cation exchange resin+With OH-，H+Transferring to the cation exchange zone 113 under the action of DC electric field to regenerate the cation exchange resin therein, OH-Transferring to the anode chamber 112 under the action of the DC electric field, and dissociating water at the interface of the cation exchange membrane 103 and the anion exchange resin to generate H+With OH-，H+Transferring to the anion exchange region 114 under the action of DC electric field to regenerate the anion exchange resin therein, OH-The liquid flows to be treated (shown by arrows) flow through the anode chamber 112 and the cathode chamber 111 at the same time, and the liquid flows are merged to obtain the resin regeneration concentrated solution. Additionally, in certain embodiments, the resin is furtherUnder the working condition, the antisludging agent can be added into the liquid flow to be treated, and then the liquid flow to be treated flows through the anode chamber and the cathode chamber. When the fluid to be treated containing the scale inhibitor flows through the polar chamber, the content of the insoluble inorganic salt in the polar chamber can be reduced, and the scaling risk of the polar chamber is reduced. The scale inhibitor mentioned in the invention comprises all agents which can play a role in dispersing the slightly soluble inorganic salt in the liquid, preventing or interfering the precipitation and scaling functions of the slightly soluble inorganic salt on the surface of the substrate, and for example comprises various organic, inorganic and polymer scale inhibitors.
In some embodiments, an opening of the cathode compartment 111 of the ion exchange unit 100 communicates with an opening of the anode compartment 112. In this case, in the regeneration condition, the liquid flow to be treated has only one flow channel, and enters from the cathode chamber 111 and flows out from the anode chamber 112, or enters from the anode chamber 112 and flows out from the cathode chamber 111. The order in which the fluid flows through the anode and cathode compartments in the regeneration mode is not limiting in this application and is applicable to all embodiments of this application.
The two conditions shown in fig. 1 and 2 are alternated, and the ion exchange unit 100 can be used to treat the liquid stream to be treated for a long time.
Fig. 3 and 4 show a schematic view of an ion exchange unit 200 according to another embodiment of the present invention. The ion exchange unit 200 comprises a cathode 201, a cation exchange membrane 203, an anion exchange membrane 204, an anode 202, a cathode chamber 211, an ion exchange chamber 210 and an anode chamber 212 which are sequentially arranged, wherein the anode chamber 212 and the cathode chamber 211 can be communicated or not communicated. The difference from the ion exchange unit 100 is that the ion exchange chamber of the ion exchange unit 200 has two cation exchange zones 213, 215 and two anion exchange zones 214, 216, as shown in fig. 3 and 4, the cation exchange zones are arranged at intervals from the anion exchange zones. In some embodiments of the invention, the ion exchange unit may comprise more than two cation exchange zones and more than two anion exchange zones, a plurality of which are capable of more fully deionizing the stream, typically the cation exchange zones are spaced apart from the anion exchange zones, and typically the cation exchange zones are paired with the anion exchange zones.
Fig. 3 and 4 schematically illustrate two conditions of fluid treatment and resin regeneration, respectively, of an ion exchange system comprising an ion exchange unit 200. As shown in fig. 3, under the liquid flow treatment condition, the liquid flow to be treated (indicated by arrows) sequentially flows through the cation exchange region 213, the anion exchange region 214, the cation exchange region 215 and the anion exchange region 216 in the ion exchange chamber 210, so as to obtain a deionized liquid flow; as shown in FIG. 4, under the regeneration condition of the resin, a voltage is applied to the cathode 201 and the anode 202 to form a DC electric field, and H is generated by water dissociation at the interface between the anion exchange membrane 104 and the cation exchange resin+With OH-，H+Transferring to cation exchange regions 213 and 215 under the action of DC electric field to regenerate the cation exchange resin therein, OH-The water migrates to the anode chamber 212 under the action of the DC electric field, and H is generated by water dissociation at the interface of the cation exchange membrane 203 and the anion exchange resin+With OH-，H+Transferring to the anion exchange zone 214 under the action of the DC electric field to regenerate the anion exchange resin therein, OH-The liquid to be treated (indicated by an arrow) flows through the anode chamber 212 and the cathode chamber 211 in this order while moving to the cathode chamber 211 under the action of the dc electric field, with the anode chamber 212 and the cathode chamber 211 communicating with each other, to obtain a resin regeneration concentrated solution. In some embodiments, under the regeneration condition, the anode chamber 212 and the cathode chamber 211 are not communicated with each other, so that two streams of the liquid to be treated can be introduced into the anode chamber 212 and the cathode chamber 211 respectively, and the two streams of the liquid can be merged to serve as the resin regeneration concentrated solution.
The ion exchange system of the embodiment of the invention also comprises a condition that a plurality of ion exchange units are connected in series. Figures 5 and 6 schematically show an ion exchange system comprising two ion exchange units 100 in series according to one embodiment of the present invention. As shown in fig. 5 and 6, two ion exchange units 100 with the same structure are connected in series in a manner that: the lower opening of the ion exchange chamber 110 of the first-stage ion exchange unit 100 is communicated with the upper opening of the ion exchange chamber 110 of the second-stage ion exchange unit 100, the lower opening of the anode chamber 112 of the first-stage ion exchange unit 100 is communicated with the upper opening of the anode chamber 112 of the second-stage ion exchange unit 100, and the lower opening of the cathode chamber 111 of the first-stage ion exchange unit 100 is communicated with the upper opening of the cathode chamber 111 of the second-stage ion exchange unit 100. The references to "upper opening" and "lower opening" herein are made with reference to the drawings only and do not represent the orientation of the physical system.
As shown in fig. 5, for two ion exchange units 100 connected in series, under the liquid flow treatment condition, a flow of liquid to be treated (as shown by arrows) sequentially flows through the ion exchange chamber of the first stage ion exchange unit 100 and the ion exchange chamber of the second stage ion exchange unit 100, so as to obtain a deionized liquid flow.
As shown in fig. 6, for two ion exchange units 100 connected in series, under the resin regeneration condition, if the anode chamber 112 and the cathode chamber 111 of the second stage ion exchange unit 100 are communicated, a flow of liquid to be treated (as shown by an arrow) sequentially flows through the anode chamber of the first stage ion exchange unit 100, the anode chamber of the second stage ion exchange unit 100, the cathode chamber of the second stage ion exchange unit 100 and the cathode chamber of the first stage ion exchange unit 100, so as to obtain the resin regeneration concentrated solution. In another embodiment, the anode chamber 112 and the cathode chamber 111 of the second stage ion exchange unit 100 are not communicated with each other, and two streams of the liquid to be treated respectively flow through the two anode chambers and the two cathode chambers, and then are merged to form the resin regeneration concentrated solution.
Figures 7 and 8 schematically illustrate an ion exchange system according to another embodiment of the present invention comprising two ion exchange units 100 in series, in a different series arrangement than the series arrangement shown in figures 5 and 6. In fig. 7 and 8, the lower opening of the ion exchange chamber 110 of the first-stage ion exchange unit 100 is communicated with the upper opening of the ion exchange chamber 110 of the second-stage ion exchange unit 100, the lower opening of the anode chamber 112 of the first-stage ion exchange unit 100 is communicated with the upper opening of the cathode chamber 111 of the second-stage ion exchange unit 100, and the lower opening of the cathode chamber 111 of the first-stage ion exchange unit 100 is communicated with the upper opening of the anode chamber 112 of the second-stage ion exchange unit 100. The references to "upper opening" and "lower opening" herein are made with reference to the drawings only and do not represent the orientation of the physical system.
As shown in fig. 7, for two ion exchange units 100 connected in series, under the liquid flow treatment condition, a flow of liquid to be treated (as shown by arrows) sequentially flows through the ion exchange chambers of the first stage ion exchange unit 100 and the ion exchange chambers of the second stage ion exchange unit 100, and a deionized liquid flow is obtained.
As shown in fig. 8, for two ion exchange units 100 connected in series, under the resin regeneration condition, two streams of liquid to be treated (as shown by arrows) respectively flow into the anode chamber 112 and the cathode chamber 111 of the first stage ion exchange unit 100, and then respectively flow out from the outlet of the cathode chamber 111 and the anode chamber 112 of the second stage ion exchange unit 100, and these two streams of liquid can be discharged after mixing or without mixing.
The ion exchange system of the embodiment of the present invention may further include three, four or more ion exchange units connected in series, and the connection manner and operation manner of the series connection may refer to the description of fig. 5 to 8.
The ion exchange system provided by the invention adopts a mode that cation exchange resin and anion exchange resin are respectively filled, so that anions and cations in fluid to be treated can be effectively removed, more importantly, the ion exchange system provided by the invention adopts an in-situ electric regeneration method to regenerate the ion exchange resin, does not need to use acid-base chemical agents or export the ion exchange resin, is simple and convenient to operate, and is a novel and efficient ion exchange system for liquid flow treatment.
Experimental examples
An ion exchange system was assembled in accordance with the ion exchange unit 100 shown in fig. 1 and 2, wherein the volume of the cation exchange resin was about 200ml and the volume of the anion exchange resin was about 400 ml. Tap water is desalted using an ion exchange unit 100. At first, the cation resin is strong acid sodium type, and the anion resin is strong base chlorine type, so that the resin needs to be regenerated into hydrogen type and hydroxyl type for desalting. In the regeneration process, the sodium chloride solution with the conductivity of 200uS/cm is used as the water inlet of the polar chamber to start regeneration, and the current is kept at 3A during regeneration until the conductivity of the regenerated water outlet is approximately equal to that of the water inlet to stop regeneration. And (3) desalting after the regeneration is finished, wherein in the desalting process, the inlet water is a sodium chloride solution with the conductivity of 2000uS/cm, the flow rate is 350ml/min, the conductivity of the produced water of the system is less than 10uS/cm, and 16L of produced water can be produced under the condition of ensuring that the conductivity of the produced water is less than 10 uS/cm.
The above water treatment method and system are only preferred embodiments of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. An ion exchange system for extracting or removing ions from a fluid stream to be treated, the system comprising at least one ion exchange unit comprising:
the cathode, the cation exchange membrane, the anion exchange membrane and the anode are sequentially arranged;
a cathode chamber located between the cathode and the cation exchange membrane, comprising two openings;
an ion exchange chamber located between the cation exchange membrane and the anion exchange membrane and comprising two openings, the ion exchange chamber comprising at least one cation exchange zone and at least one anion exchange zone filled with a cation exchange resin and an anion exchange resin, respectively, the cation exchange zone and the anion exchange zone being spaced apart, the interface of the cation exchange zone and the anion exchange zone being substantially perpendicular to the cation exchange membrane or the anion exchange membrane; and
an anode chamber located between the anion exchange membrane and the anode and comprising two openings,
the ion exchange system has two operation conditions of liquid flow treatment and resin regeneration,
under the working condition of liquid flow treatment, liquid flow to be treated flows through the cation resin and the anion resin in the ion exchange chamber to obtain deionized liquid flow;
under the working condition of resin regeneration, voltage is applied to the cathode and the anode to form a direct current electric field, and the anion exchange membrane and the cation exchange membraneWater dissociation at exchange resin interface to form H+With OH-，H+Transferring to the cation exchange zone under the action of DC electric field to regenerate the cation exchange resin, OH-Transferring to the anode chamber under the action of a direct current electric field, and dissociating water at the interface of the cation exchange membrane and the anion exchange resin to generate H+With OH-，H+Transferring to the anion exchange area under the action of a direct current electric field to regenerate the anion exchange resin, OH-And (3) transferring the fluid to be treated to the cathode chamber under the action of a direct current electric field, and simultaneously, flowing the fluid to be treated through the anode chamber and the cathode chamber to obtain a resin regeneration concentrated solution.
2. The ion exchange system of claim 1 wherein an antiscalant is added to the stream to be treated during the resin regeneration mode prior to passing the stream to be treated through the anode and cathode compartments.
3. The ion exchange system of claim 1 wherein the ion exchange unit further comprises at least one spacer screen located inside the ion exchange chamber and permeable to the fluid stream and ions in the fluid stream for immobilizing the ion exchange resin or separating the cation exchange zone and the cation exchange zone.
4. The ion exchange system of claim 1 wherein the cathode, cation exchange membrane, anion exchange membrane and anode are arranged in parallel.
5. The ion exchange system of claim 1 wherein an opening of the cathode chamber communicates with an opening of the anode chamber in the ion exchange unit.
6. The ion exchange system of claim 1 wherein the ion exchange system comprises two or more of the ion exchange units in series,
the ion exchange chamber of the previous stage ion exchange unit is connected with the ion exchange chamber of the next stage ion exchange unit to form an ion exchange flow channel;
the cathode chamber of the previous stage ion exchange unit is connected with the cathode chamber of the next stage ion exchange unit, the anode chamber of the previous stage ion exchange unit is connected with the anode chamber of the next stage ion exchange unit, and the cathode chamber of the last stage ion exchange unit is communicated with the anode chamber to form a polar chamber flow channel;
under the working condition of liquid flow treatment, a strand of liquid flow to be treated flows through the ion exchange chamber of each ion exchange unit to obtain deionized liquid flow, and under the working condition of resin regeneration, a strand of liquid flow to be treated flows through the anode chamber and the cathode chamber of each ion exchange unit to obtain resin regeneration concentrated solution.
7. The ion exchange system of claim 1 wherein the ion exchange system comprises two or more of the ion exchange units in series,
the ion exchange chamber of the previous stage ion exchange unit is connected with the ion exchange chamber of the next stage ion exchange unit to form an ion exchange flow channel;
the cathode chamber of the previous stage ion exchange unit is connected with the anode chamber of the next stage ion exchange unit, and the anode chamber of the previous stage ion exchange unit is connected with the cathode chamber of the next stage ion exchange unit to form two polar chamber runners;
under the working condition of liquid flow treatment, one liquid flow to be treated flows through the ion exchange chamber of each ion exchange unit to obtain deionized liquid flow, under the working condition of resin regeneration, the two liquid flows to be treated respectively enter from the anode chamber and the cathode chamber of the first-stage ion exchange unit, and the two liquid flows to be treated respectively enter from the anode chamber and the cathode chamber of the last-stage ion exchange unit to obtain two resin regeneration concentrated solutions.
8. The ion exchange system of claim 1 wherein the liquid stream to be treated comprises one or more of tap water, seawater, brackish water, industrial wastewater, sugar liquor, mineral leaching liquor, fermentation broth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010184095.2A CN113399004A (en) | 2020-03-16 | 2020-03-16 | Ion exchange system for liquid stream treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010184095.2A CN113399004A (en) | 2020-03-16 | 2020-03-16 | Ion exchange system for liquid stream treatment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113399004A true CN113399004A (en) | 2021-09-17 |
Family
ID=77676817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010184095.2A Pending CN113399004A (en) | 2020-03-16 | 2020-03-16 | Ion exchange system for liquid stream treatment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113399004A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1051337A (en) * | 1989-09-29 | 1991-05-15 | 莫斯科科学生产技术联合化工机械制造Npo“尼依柯麦希” | The desalting method of aqueous electrolyte liquid and electrodialyzer |
| CN1401432A (en) * | 2002-06-18 | 2003-03-12 | 北京国电龙源环保工程有限公司 | Method and apparatus for regenerating ion exchange resin by bipolar membrane hydrolytic dissociation |
| JP2003285070A (en) * | 2002-03-28 | 2003-10-07 | Norihisa Miyamatsu | Electric regeneration type pure water production apparatus and manufacturing method therefor |
| CN1787971A (en) * | 2004-02-09 | 2006-06-14 | 日立麦克赛尔株式会社 | Apparatus for forming ion-exchanged water and method for regenerating ion exchange resin therein |
| WO2014208794A1 (en) * | 2013-06-27 | 2014-12-31 | 솔브레인나노텍 주식회사 | Apparatus for generating electrolyzed water, used in semiconductor process |
| CN104603067A (en) * | 2012-08-27 | 2015-05-06 | 默克专利股份公司 | Improved electrodeionization module and apparatus |
| US20180037477A1 (en) * | 2015-03-04 | 2018-02-08 | Panasonic Intellectual Property Management Co. Ltd. | Water treatment apparatus and operation method for water treatment apparatus |
| CN212309615U (en) * | 2020-03-16 | 2021-01-08 | 佛山市云米电器科技有限公司 | Ion exchange system for liquid stream treatment |
-
2020
- 2020-03-16 CN CN202010184095.2A patent/CN113399004A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1051337A (en) * | 1989-09-29 | 1991-05-15 | 莫斯科科学生产技术联合化工机械制造Npo“尼依柯麦希” | The desalting method of aqueous electrolyte liquid and electrodialyzer |
| JP2003285070A (en) * | 2002-03-28 | 2003-10-07 | Norihisa Miyamatsu | Electric regeneration type pure water production apparatus and manufacturing method therefor |
| CN1401432A (en) * | 2002-06-18 | 2003-03-12 | 北京国电龙源环保工程有限公司 | Method and apparatus for regenerating ion exchange resin by bipolar membrane hydrolytic dissociation |
| CN1787971A (en) * | 2004-02-09 | 2006-06-14 | 日立麦克赛尔株式会社 | Apparatus for forming ion-exchanged water and method for regenerating ion exchange resin therein |
| CN104603067A (en) * | 2012-08-27 | 2015-05-06 | 默克专利股份公司 | Improved electrodeionization module and apparatus |
| WO2014208794A1 (en) * | 2013-06-27 | 2014-12-31 | 솔브레인나노텍 주식회사 | Apparatus for generating electrolyzed water, used in semiconductor process |
| US20180037477A1 (en) * | 2015-03-04 | 2018-02-08 | Panasonic Intellectual Property Management Co. Ltd. | Water treatment apparatus and operation method for water treatment apparatus |
| CN212309615U (en) * | 2020-03-16 | 2021-01-08 | 佛山市云米电器科技有限公司 | Ion exchange system for liquid stream treatment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100784438B1 (en) | apparatus and method for continuous electrodeionization | |
| JP3416455B2 (en) | Electrodeionization method for purifying liquids | |
| CN101195081B (en) | Method and apparatus for preventing scaling in electrodeionization units | |
| KR102047155B1 (en) | Method and device for treating boron-containing water | |
| US20070295604A1 (en) | Electrically-driven separation apparatus | |
| SG189686A1 (en) | Low energy system and method of desalinating seawater | |
| US20140091039A1 (en) | System and method for the treatment of hydraulic fracturing backflow water | |
| CN105198133A (en) | Ultra-pure water preparation system and method capable of preventing electrodeionization device from scaling | |
| WO2013074231A1 (en) | Method and installation comrising electrodialysis, bi- polar electrodialysis ion exchange | |
| CN212142639U (en) | Ion exchange system for liquid stream treatment | |
| CN217265278U (en) | Zero release clean system to printing and dyeing waste water | |
| Ba et al. | An integrated electrolysis-microfiltration-ion exchange closed-loop system for effective water softening without chemicals input and spent regenerant discharge | |
| CN212309615U (en) | Ion exchange system for liquid stream treatment | |
| JP4250922B2 (en) | Ultrapure water production system | |
| CN107098526A (en) | The film concentrator and handling process of strong brine zero-emission sub-prime crystallization | |
| CN107381889A (en) | A kind of circulating water treatment method | |
| CN113399004A (en) | Ion exchange system for liquid stream treatment | |
| CA3036590C (en) | Controlled produced water desalination for enhanced hydrocarbon recovery | |
| KR102440909B1 (en) | Regenerative ion exchange device and its operation method | |
| CN106809993A (en) | A kind of Ultrapure water treatment technology | |
| CN212142638U (en) | Ion exchange system for liquid stream treatment | |
| CN102491461B (en) | Membrane-less electrodeionization-based water softening device and water softening method therefor | |
| CN213434506U (en) | Ion exchange system for liquid stream treatment | |
| CN212309614U (en) | Ion exchange system for liquid stream treatment | |
| CN113399005A (en) | Ion exchange system for liquid stream treatment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20211026 Address after: 528308 No.2, North Xinxi 4th Road, Xiashi village, Lunjiao street, Shunde District, Foshan City, Guangdong Province Applicant after: Guangdong Chestnut Technology Co.,Ltd. Address before: 528300 Nepheline Village Committee, Lunjiao Sub-district Office, Shunde District, Foshan City, Guangdong Province Applicant before: FOSHAN VIOMI ELECTRICAL TECHNOLOGY Co.,Ltd. Applicant before: Chen Xiaoping |
|
| TA01 | Transfer of patent application right |