EDI device based on electrodialysis and ion exchange technology

Abstract

The utility model relates to the technical field of water quality purification treatment, in particular to an electrodialysis and ion exchange technology-based EDI (electrodeionization) device, which comprises a purification box, an anode junction box, a cathode junction box, anion exchange resin and cation exchange resin, the purification box is provided with a fresh water inlet and a fresh water outlet, two ends of the fresh water chamber are respectively communicated with the fresh water inlet and the fresh water outlet, the purification box is provided with a concentrated water inlet and a concentrated water outlet, and two ends of the concentrated water chamber are respectively communicated with the concentrated water inlet and the concentrated water outlet; according to the utility model, acid / alkali consumption and waste liquid treatment can be avoided, the energy consumption of resin regeneration is reduced, and the water treatment efficiency and sustainability are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to water quality purification treatment technical field especially is a kind of EDI device based on electrodialysis and ion exchange technology. BACKGROUND

[0002] EDI technology is a new water and ultrapure water preparation technology.The technology fuses electrodialysis technology and ion exchange technology, realizes the directional migration of ion under the action of direct current electric field by the selective permeation of anion and cation exchange resin to anion and cation and the exchange of ion exchange resin to ion, reaches the depth purification of water and desalination, to complete the purification of water.

[0003] Traditional ion exchange resin removes impurity ions (such as Ca 2+ , Mg 2+ , Cl - Etc.) in water by chemical adsorption, but resin needs to be washed by acid (such as HCl) or alkali (such as NaOH) solution for chemical regeneration after saturation, and frequent regeneration leads to significant increase in the cost of chemical reagent procurement, storage and treatment, and causes shutdown, reagent consumption and waste liquid treatment problems. SUMMARY

[0004] The utility model provides a kind of EDI device based on electrodialysis and ion exchange technology for the deficiency of prior art, avoid acid / base consumption and waste liquid treatment, reduce the energy consumption of regenerated resin, improve water treatment efficiency and sustainability.

[0005] To solve the above technical problems, the utility model adopts the following technical solutions:

[0006] The utility model provides a kind of EDI device based on electrodialysis and ion exchange technology, including at least one purification tank, the anode terminal box and cathode terminal box respectively connected at the both ends of purification tank, several anion exchange resins and cation exchange resins located in purification tank and by anode terminal box to cathode terminal box alternately distributed, the anion exchange resin and cation exchange resin divide the internal space of purification tank, the adjacent space of anion exchange resin near anode terminal box side is concentrated water chamber, the adjacent space of anion exchange resin near cathode terminal box side is fresh water chamber;

[0007] The purification tank is provided with fresh water inlet and fresh water outlet, and the both ends of the fresh water chamber are communicated with the fresh water inlet and the fresh water outlet respectively, the purification tank is provided with concentrated water inlet and concentrated water outlet, and the both ends of the concentrated water chamber are communicated with the concentrated water inlet and the concentrated water outlet respectively.

[0008] The system also includes a freshwater delivery pipe, which is connected to a first freshwater pipe and a second freshwater pipe. The first freshwater pipe is connected to a freshwater inlet, and the second freshwater pipe is connected to a freshwater outlet. The first freshwater pipe is equipped with a first freshwater valve, and the second freshwater pipe is equipped with a second freshwater valve. The two ends of the freshwater delivery pipe are respectively connected to a main inlet pipe and a freshwater outlet pipe. The freshwater outlet pipe is connected to a product water pipe, and the product water pipe is equipped with a product water valve.

[0009] It also includes a concentrate delivery pipe, which is connected to a first concentrate pipe and a second concentrate pipe. The first concentrate pipe is connected to a concentrate inlet, and the second concentrate pipe is connected to a concentrate outlet. The first concentrate pipe is equipped with a first concentrate valve, and the second concentrate pipe is equipped with a second concentrate valve. One end of the concentrate delivery pipe is connected to a main water inlet pipe, and the other end of the concentrate delivery pipe is connected to a concentrate discharge pipe, which is equipped with a concentrate discharge valve.

[0010] The freshwater delivery pipe is connected to a first freshwater cleaning pipe and a second freshwater cleaning pipe at both ends. The first freshwater cleaning pipe is equipped with a first cleaning valve, and the second freshwater cleaning pipe is equipped with a second cleaning valve.

[0011] The concentrated water delivery pipe is connected to a first concentrated water cleaning pipe and a second concentrated water cleaning pipe at both ends. The first concentrated water cleaning pipe is equipped with a third cleaning valve, and the second concentrated water cleaning pipe is equipped with a fourth cleaning valve.

[0012] The purification tank is provided in several units, the fresh water delivery pipe is provided in at least two units, each fresh water delivery pipe is connected to several purification tanks, the concentrated water delivery pipe is provided in at least two units, each concentrated water delivery pipe is connected to several purification tanks, adjacent fresh water delivery pipes are connected, and adjacent concentrated water delivery pipes are connected.

[0013] The beneficial effects of this utility model are:

[0014] Maintaining the resin's exchange capacity without shutdown for chemical regeneration, and generating H+ through water electrolysis. + and OH - This method avoids acid / alkali consumption and waste liquid treatment, reduces energy consumption for regenerating resin, not only avoids the shortcomings of traditional regeneration methods, but also significantly improves water treatment efficiency and sustainability. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the ion exchange principle of an EDI device based on electrodialysis and ion exchange technology.

[0016] Figure 2 Schematic diagram of the cleanroom structure Figure 1 .

[0017] Figure 3 Structure of the purification tank Figure 2 .

[0018] Figure 4 Top view of the EDI device based on electrodialysis and ion exchange technology.

[0019] Figure 5 Structure of the connection between the fresh water delivery pipe and the purification tank

[0020] Figure 6 Side view of the EDI device based on electrodialysis and ion exchange technology.

[0021] Figure 7 Structure of the connection between the concentrated water delivery pipe and the purification tank

[0022] Figure 8 Front view of the EDI device based on electrodialysis and ion exchange technology.

[0023] Figure 9 Rear view of the EDI device based on electrodialysis and ion exchange technology.

[0024] 1. Purification tank; 101. Anode terminal box; 102. Cathode terminal box;

[0025] 11. Concentrated water chamber; 12. Fresh water chamber;

[0026] 1001. Fresh water inlet; 1002. Fresh water outlet; 1003. Concentrated water inlet; 1004. Concentrated water outlet;

[0027] 2. Anion exchange resin; 3. Cation exchange resin;

[0028] 4. Fresh water delivery pipe;

[0029] 401. First fresh water cleaning pipe; 4011. First cleaning valve;

[0030] 402. Second fresh water cleaning pipe; 4021. Second cleaning valve;

[0031] 41. First fresh water pipe; 411. First fresh water valve;

[0032] 42. Second fresh water pipe; 421. Second fresh water valve;

[0033] 43. Total water inlet pipe; 44. Fresh water discharge pipe;

[0034] 5. Water production pipe; 51. Water production valve;

[0035] 6. Concentrated water delivery pipe;

[0036] 601, first concentrated water cleaning pipe; 6011, third cleaning valve;

[0037] 602, second concentrated water cleaning pipe; 6021, fourth cleaning valve;

[0038] 61, first concentrated water pipe; 611, first concentrated water valve;

[0039] 62, second concentrated water pipe; 621, second concentrated water valve;

[0040] 7, concentrated water discharge pipe; 71, concentrated water discharge valve. DETAILED DESCRIPTION

[0041] For the convenience of those skilled in the art, the present application will be further described below in conjunction with the embodiments and drawings. The specific embodiments of the present application will be described below, and it should be noted that, in the specific description of these embodiments, the present specification cannot describe all the features of the actual embodiments in detail for the sake of brevity and conciseness.

[0042] Reference Figures 1 to 9 As shown in the utility model provides a kind of EDI device based on electrodialysis and ion exchange technology, including at least one purification tank 1, respectively connect the anode terminal box 101 and cathode terminal box 102 at the both ends of purification tank 1, several anion exchange resin 2 and cation exchange resin 3 located in purification tank 1 and by anode terminal box 101 to cathode terminal box 102 alternately distributed, the anion exchange resin 2 and cation exchange resin 3 divide the internal space of purification tank 1, the adjacent space of anion exchange resin 2 near anode terminal box 101 side is concentrated water chamber 11, the adjacent space of anion exchange resin 2 near cathode terminal box 102 side is fresh water chamber 12;The purification tank 1 is provided with fresh water inlet 1001 and fresh water outlet 1002, the both ends of fresh water chamber 12 are communicated with fresh water inlet 1001 and fresh water outlet 1002 respectively, the purification tank 1 is provided with concentrated water inlet 1003 and concentrated water outlet 1004, the both ends of concentrated water chamber 11 are communicated with concentrated water inlet 1003 and concentrated water outlet 1004 respectively.

[0043] Reference Figures 1 to 3 As shown in the utility model, in actual application, fresh water and concentrated water are loaded through fresh water inlet 1001 and concentrated water inlet 1003 respectively, anode terminal box 101 and cathode terminal box 102 are connected to direct current, under the action of direct current field, water occurs oxidation reaction in anode: 2H2O→O2↑+4H + +4e - ; Water occurs reduction reaction in cathode: 2H2O+2e-→H2↑+2OH - , cation exchange resin 3 adsorbs cation (such as Na + , Ca2+ ), then H + Migrates from the anode to the resin, replacing the impurity cations, the anion exchange resin 2 adsorbs the anions (such as Cl - , SO4 2- ) in the water, OH - Migrates from the cathode to the resin, replacing the impurity anions, under the driving of the electric field, the replaced impurity ions pass through the selective ion exchange membrane into the concentrated water chamber 11, the cation exchange resin 3 allows cations to pass through, the anion exchange resin 2 allows anions to pass through, the external negative pressure extraction device is connected to the concentrated water outlet 1004, the mixture in the concentrated water chamber 11 is extracted through the external device, and the impurity ions in the concentrated water chamber 11 are discharged with the waste water flow; the generated H + and OH - are used as raw materials for regenerating the resin, H + and OH - are continuously supplemented into the resin, the exchange capacity of the resin is maintained, chemical regeneration is not required, H + and OH - are self-produced by electrolysis of water, acid / alkali consumption and waste liquid treatment are avoided, the energy consumption for regenerating the resin is reduced, the water in the fresh water chamber 12 after the electrodialysis is pure water, the fresh water outlet 1002 is connected to the corresponding extraction device, and the pure water is smoothly discharged, which is suitable for preparation of ultrapure water, not only avoids the shortcomings of the traditional regeneration mode, but also significantly improves the water treatment efficiency and sustainability; through the multiple fresh water chambers 12 and concentrated water chambers 11, the number of ion exchanges is increased, and the pure water manufacturing efficiency is improved.

[0044] As shown in Figure 4 , 5 In the embodiment, a fresh water conveying pipe 4 is further included, the fresh water conveying pipe 4 is connected with a first fresh water pipe 41 and a second fresh water pipe 42, the first fresh water pipe 41 is connected with the fresh water inlet 1001, the second fresh water pipe 42 is connected with the fresh water outlet 1002, the first fresh water pipe 41 is installed with a first fresh water valve 411, the second fresh water pipe 42 is installed with a second fresh water valve 421, two ends of the fresh water conveying pipe 4 are respectively connected with a total water inlet pipe 43 and a fresh water discharge pipe 44, the fresh water discharge pipe 44 is connected with a water production pipe 5 in pipeline, and the water production pipe 5 is installed with a water production valve 51; in actual application, the first fresh water valve 411 is opened, the water production valve 51, the second fresh water valve 421 and the fresh water discharge pipe 44 are closed, the total water inlet pipe 43 smoothly guides the fresh water into the fresh water chamber 12, when the pure water is generated in the fresh water chamber 12, the water production valve 51 is opened, and the produced water is discharged; when the pure water transportation is completed, the second fresh water valve 421 is opened, the second fresh water valve 421 is communicated with the fresh water discharge pipe 44, the water production valve 51 is closed, and the residual substances in the fresh water chamber 12 are conveniently cleaned.

[0045] As shown in Figure 6 , 7As shown, in the embodiment, a concentrated water conveying pipe 6 is further included, the concentrated water conveying pipe 6 is connected with a first concentrated water pipe 61 and a second concentrated water pipe 62, the first concentrated water pipe 61 is connected with the concentrated water inlet 1003, the second concentrated water pipe 62 is connected with the concentrated water outlet 1004, the first concentrated water pipe 61 is installed with a first concentrated water valve 611, the second concentrated water pipe 62 is installed with a second concentrated water valve 621, one end of the concentrated water conveying pipe 6 is communicated with the total water inlet pipe 43, the other end of the concentrated water conveying pipe 6 is connected with a concentrated water discharge pipe 7, the concentrated water discharge pipe 7 is installed with a concentrated water discharge valve 71.

[0046] Referring to Figure 6 , 7 As shown, in actual application, the total water inlet pipe 43 is connected with the fresh water conveying pipe 4 and the concentrated water conveying pipe 6 through a tee joint, so as to smoothly control the pipeline switching of the total water inlet pipe 43 with the fresh water conveying or the concentrated water conveying, close the connection between the total water inlet pipe 43 and the fresh water conveying pipe 4, open the first concentrated water valve 611, close the second concentrated water valve 621 and the concentrated water discharge valve 71, and the concentrated water enters the concentrated water chamber 11 through the total water inlet pipe 43 and the first concentrated water pipe 61, so as to smoothly guide the concentrated water; when it is needed to discharge the concentrated water, close the first concentrated water valve 611, open the second concentrated water valve 621 and the concentrated water discharge valve 71, and the concentrated water is discharged by the concentrated water discharge pipe 7 after passing through the second concentrated water pipe 62 and the concentrated water conveying pipe 6, so as to realize the discharge of the concentrated water.

[0047] Referring to Figure 4 , 8 , 9, in the embodiment, two ends of the fresh water conveying pipe 4 are respectively connected with a first fresh water cleaning pipe 401 and a second fresh water cleaning pipe 402, the first fresh water cleaning pipe 401 is installed with a first cleaning valve 4011, and the second fresh water cleaning pipe 402 is installed with a second cleaning valve 4021.

[0048] In actual application, only the first fresh water cleaning pipe 401, the second fresh water cleaning pipe 402 and the fresh water conveying pipe 4 are communicated, the first fresh water valve 411, the second fresh water valve 421, the first cleaning valve 4011 and the second cleaning valve 4021 are opened, the fresh water flows into the fresh water chamber 12 after passing through the first fresh water cleaning pipe 401, the fresh water conveying pipe 4 and the first fresh water pipe 41, the fresh water flushes the inside of the fresh water chamber 12 and is discharged along the second fresh water pipe 42, the fresh water conveying pipe 4 and the second fresh water cleaning pipe 402, so as to smoothly clean the fresh water chamber 12.

[0049] Referring to Figure 4 , 6 , 8, in the embodiment, two ends of the concentrated water conveying pipe 6 are respectively connected with a first concentrated water cleaning pipe 601 and a second concentrated water cleaning pipe 602, the first concentrated water cleaning pipe 601 is installed with a third cleaning valve 6011, and the second concentrated water cleaning pipe 602 is installed with a fourth cleaning valve 6021.

[0050] In practical applications, only the first concentrated water cleaning pipe 601, the second concentrated water cleaning pipe 602, and the concentrated water delivery pipe 6 are connected. The first concentrated water valve 611, the second concentrated water valve 621, the third cleaning valve 6011, and the fourth cleaning valve 6021 are opened. The concentrated water flows into the concentrated water chamber 11 after passing through the first concentrated water cleaning pipe 601, the concentrated water delivery pipe 6, and the first concentrated water pipe 61. The concentrated water flushes the inside of the concentrated water chamber 11 and is discharged along the second concentrated water pipe 62, the concentrated water delivery pipe 6, and the second concentrated water cleaning pipe 602, thus successfully cleaning the concentrated water chamber 11.

[0051] refer to Figure 4 , 8 As shown in Figures 9 and 1, in this embodiment, there are several purification tanks 1, at least two freshwater delivery pipes 4, each of which is connected to several purification tanks 1, and at least two concentrated water delivery pipes 6, each of which is connected to several purification tanks 1. Adjacent freshwater delivery pipes 4 are connected, and adjacent concentrated water delivery pipes 6 are connected. The system adopts a parallel design of at least two-channel freshwater / concentrated water delivery pipes 6, combined with the interconnection structure of adjacent pipes, to form a redundant fluid network. When a single freshwater or concentrated water pipe is blocked or leaks, the fluid can be automatically diverted through the connecting nodes to ensure the continuous and stable operation of the system and maintain a stable delivery capacity.

[0052] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the present utility model without departing from the scope of the present utility model shall fall within the scope of the present utility model.

Claims

1. An EDI device based on electrodialysis and ion exchange technology, characterized in that, It includes at least one purification box (1), an anode junction box (101) and a cathode junction box (102) respectively connected to both ends of the purification box (1), and a plurality of anion exchange resins (2) and cation exchange resins (3) located inside the purification box (1) and alternately distributed from the anode junction box (101) to the cathode junction box (102). The anion exchange resins (2) and cation exchange resins (3) divide the internal space of the purification box (1). The adjacent space of the anion exchange resin (2) near the anode junction box (101) is the concentrate chamber (11), and the adjacent space of the anion exchange resin (2) near the cathode junction box (102) is the desalination chamber (12). The purification box (1) is provided with a fresh water inlet (1001) and a fresh water outlet (1002). Both ends of the fresh water chamber (12) are respectively connected to the fresh water inlet (1001) and the fresh water outlet (1002). The purification box (1) is provided with a concentrated water inlet (1003) and a concentrated water outlet (1004). Both ends of the concentrated water chamber (11) are respectively connected to the concentrated water inlet (1003) and the concentrated water outlet (1004).

2. The EDI device based on electrodialysis and ion exchange technology according to claim 1, characterized in that, It also includes a freshwater delivery pipe (4), which is connected to a first freshwater pipe (41) and a second freshwater pipe (42). The first freshwater pipe (41) is connected to a freshwater inlet (1001), and the second freshwater pipe (42) is connected to a freshwater outlet (1002). The first freshwater pipe (41) is equipped with a first freshwater valve (411), and the second freshwater pipe (42) is equipped with a second freshwater valve (421). The two ends of the freshwater delivery pipe (4) are respectively connected to a main water inlet pipe (43) and a freshwater discharge pipe (44). The freshwater discharge pipe (44) is connected to a water production pipe (5), and the water production pipe (5) is equipped with a water production valve (51).

3. The EDI device based on electrodialysis and ion exchange technology according to claim 2, characterized in that, It also includes a concentrate delivery pipe (6), which is connected to a first concentrate pipe (61) and a second concentrate pipe (62). The first concentrate pipe (61) is connected to a concentrate inlet (1003), and the second concentrate pipe (62) is connected to a concentrate outlet (1004). The first concentrate pipe (61) is equipped with a first concentrate valve (611), and the second concentrate pipe (62) is equipped with a second concentrate valve (621). One end of the concentrate delivery pipe (6) is connected to the main inlet pipe (43), and the other end of the concentrate delivery pipe (6) is connected to a concentrate discharge pipe (7). The concentrate discharge pipe (7) is equipped with a concentrate discharge valve (71).

4. The EDI device based on electrodialysis and ion exchange technology according to claim 2, characterized in that, The two ends of the freshwater delivery pipe (4) are respectively connected to a first freshwater cleaning pipe (401) and a second freshwater cleaning pipe (402). The first freshwater cleaning pipe (401) is equipped with a first cleaning valve (4011), and the second freshwater cleaning pipe (402) is equipped with a second cleaning valve (4021).

5. The EDI device based on electrodialysis and ion exchange technology according to claim 3, characterized in that, The two ends of the concentrated water delivery pipe (6) are respectively connected to a first concentrated water cleaning pipe (601) and a second concentrated water cleaning pipe (602). The first concentrated water cleaning pipe (601) is equipped with a third cleaning valve (6011), and the second concentrated water cleaning pipe (602) is equipped with a fourth cleaning valve (6021).

6. The EDI device based on electrodialysis and ion exchange technology according to claim 3, characterized in that, Several purification tanks (1) are provided, and at least two freshwater delivery pipes (4) are provided, each of which is connected to several purification tanks (1). At least two concentrated water delivery pipes (6) are provided, each of which is connected to several purification tanks (1). Pipe (6) is connected to several purification boxes (1), and is connected to adjacent freshwater delivery pipes (4). The adjacent concentrated water delivery pipes (6) are connected.

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