Membraneless electrodeionization device structure

Abstract

The present invention discloses a novel membraneless electrodeionization device structure. It comprises a composite top cover, a composite bottom cover, a cylindrical shell and an ion exchange resin layer. The upper end of the cylindrical shell is provided with a composite top cover, and the lower end is provided with a composite bottom cover. The composite top cover and the composite bottom cover have the same structure and are symmetrically arranged at the middle and two ends of the cylindrical shell. The cylindrical shell is filled with an ion exchange resin layer. The composite top cover and the composite bottom cover are pressed toward the middle of the cylindrical shell at both ends of the cylindrical shell, thereby pressing the ion exchange resin layer. The composite top cover / bottom cover both comprise an upper interface, an upper cable sealing joint, a top cover plate, an upper electrode connecting rod, an upper porous pressing plate, an upper resin filter plate and an upper electrode net. In the present invention, the resin layer can be evenly pressed under the action of the composite top cover and the composite bottom cover, and the upper and lower resin particles are always kept in close contact, which effectively reduces the unfavorable water flow distribution condition of the resin layer, effectively ensures good regeneration of the resin, simplifies the structure, and is easy to install and maintain.

Description

Technical Field

[0001] The invention relates to a resin regeneration structure, in particular to a membraneless electrodeionization device (MFEDI) structure. Background Art

[0002] The authorized invention patents (patent numbers 201110048386.X; ZL201210016704.9; ZL201410197346.5; ZL201410760013.9) introduce a membrane-free electrodeionization technology (MFEDI). In principle, the MFEDI device is equivalent to a mixed ion exchange bed that uses electrical regeneration instead of traditional chemical regeneration, commonly known as an electro-mixed bed. It can replace traditional mixed beds and conventional electro-deionization technology and is widely used in high-purity water treatment. It can also be used as a secondary desalination device in a deep desalination system, and can form a multi-stage deep desalination system with reverse osmosis, mixed beds, etc.

[0003] The original membraneless electrodeionization device, during the installation process, uses a screw pressing method to compress the resin layer. The screw is located in the center of the resin layer, and the center of the resin layer is pressed tightly. The closer to the edge of the cylinder, the less the pressing force. This resin layer pressing method has the following disadvantages.

[0004] 1. The tightness between the resin layers is different. During the water production and regeneration process, the water permeability between the resin layers is different. The saturation of the resin is uneven, which is not conducive to current regeneration and the water quality of the produced water is prone to fluctuations.

[0005] 2. The screws used for fastening are not fixed on the top cover / bottom cover. During the transportation of the device, the entire resin layer will slide to a certain extent, which is not conducive to subsequent installation and maintenance.

[0006] 3. The O-ring on the porous plate is not very airtight and there is a risk of resin leakage.

[0007] 4. The fastening nut on the screw used to compress the resin layer will gradually loosen during the transportation, installation and operation of the device, resulting in insufficient compression of the resin layer, increased regeneration resistance, increased regeneration energy consumption, and subsequent adjustments are more cumbersome. Summary of the invention

[0008] In order to solve the problems existing in the background technology, the purpose of the present invention is to propose a membraneless electrodeionization device, which requires the resin layer to be easy to compress, the structure to be simple, the maintenance to be easy, the regeneration voltage and current to be relatively stable during operation, and solves the problem of insufficient compression force on the edge of the resin layer in the cylinder of the original membraneless electrodeionization device in which the screw is located in the center of the resin layer.

[0009] The technical solution adopted by the present invention is:

[0010] The invention comprises a composite top cover, a composite bottom cover, a cylindrical shell and an ion exchange resin layer. The composite top cover is provided at the upper end of the cylindrical shell, and the composite bottom cover is provided at the lower end. The composite top cover and the composite bottom cover have the same structure and are symmetrically arranged at the middle and two ends of the cylindrical shell. The cylindrical shell is filled with the ion exchange resin layer. The composite top cover and the composite bottom cover are pressed toward the middle of the cylindrical shell at both ends of the cylindrical shell, thereby pressing the ion exchange resin layer.

[0011] The composite top cover comprises an upper interface, an upper cable sealing joint, a top cover plate, an upper electrode connecting rod, an upper porous pressing plate, an upper resin filter plate and an upper electrode net; the periphery of the top cover plate is fixed to the upper end surface of the cylindrical shell by top cover plate fastening bolts, and an annular column base is provided at the top cover plate close to the inner circumference of the cylindrical shell, and the annular column base and the inner circumference of the cylindrical shell are in close contact; an upper O-ring is installed between the top cover plate and the upper end surface of the cylindrical shell between the annular column base and the top cover plate fastening bolts; an upper porous pressing plate and an upper resin filter plate are installed in the cylindrical shell below the top cover plate from top to bottom The upper porous pressure plate is fixedly connected to the lower end surface of the top cover plate by the first upper connecting bolt, and a plurality of through holes are opened on the upper porous pressure plate along the axial direction of the cylindrical shell, and the through holes are arranged at intervals; the upper resin filter plate and the upper electrode net are fixedly connected to the upper porous pressure plate by the second upper connecting bolt; a through hole is opened in the center of the top cover plate as an upper interface; a through hole is opened at the eccentric position of the top cover plate as an upper cable sealing joint, and an upper electrode connecting rod is installed in the upper cable sealing joint, and the upper electrode connecting rod passes downward through the upper porous pressure plate, the upper resin filter plate, and the upper electrode net in turn, and is finally fastened to the upper electrode net.

[0012] The composite top cover comprises a lower interface, a lower cable sealing joint, a bottom cover plate, a lower electrode connecting rod, a lower porous pressing plate, a lower resin filter plate and a lower electrode net; the periphery of the bottom cover plate is fixed to the lower end surface of the cylindrical shell by the bottom cover plate fastening bolts, and an annular column base is provided at the bottom cover plate close to the inner circumference of the cylindrical shell, and the annular column base and the inner circumference of the cylindrical shell are in close contact; a lower O-ring is installed between the bottom cover plate and the lower end surface of the cylindrical shell between the annular column base and the bottom cover plate fastening bolts; the lower porous pressing plate and the lower resin filter plate are installed in the cylindrical shell above the bottom cover plate from bottom to top The lower porous pressure plate is fixedly connected to the lower end surface of the bottom cover plate by the first lower connecting bolt, and a plurality of through holes are opened in the lower porous pressure plate along the axial direction of the cylindrical shell, and the through holes are arranged at intervals; the lower resin filter plate and the lower electrode net are fixedly connected to the lower porous pressure plate by the second lower connecting bolt, and a through hole is opened in the center of the bottom cover plate as a lower interface; a through hole is opened at the eccentric position of the bottom cover plate as a lower cable sealing joint, and a lower electrode connecting rod is installed in the lower cable sealing joint, and the lower electrode connecting rod passes through the lower porous pressure plate, the lower resin filter plate and the lower electrode net in turn and is finally fastened to the lower electrode net.

[0013] The ion exchange resin layer contains at least one cation exchange resin and one anion exchange resin.

[0014] The ion exchange resin layer is filled with anion and cation exchange resins uniformly mixed together; or anion and cation exchange resins of different proportions or different types are uniformly mixed and then filled in multiple layers; or cation exchange resins and anion exchange resins are filled in multiple layers in an alternating manner; or cation exchange resins are filled in multiple layers in an alternating manner of cation exchange resins, anion resins or cation resins, cation exchange resins, anion resins or cation resins, etc., and the cation exchange resins are formed by uniformly mixing anion and cation exchange resins.

[0015] In the upper electrode net and the lower electrode net, one electrode is an anode and the other electrode is a cathode, which are respectively connected to two ends of an external power supply, and the electrode polarity is switched during the operation of the membraneless electrodeionization device.

[0016] The upper electrode net is connected to an external power source through an upper electrode connecting rod and an upper cable sealing joint, and the lower electrode net is connected to an external power source through a lower electrode connecting rod and a lower cable sealing joint.

[0017] The beneficial effects of the present invention are:

[0018] The resin inside the membraneless electrodeionization device of the present invention is easy to be compressed without loosening or displacement, and the resin can be added or deleted relatively easily. The pressure of the resin layer is adjustable to meet the water quality requirements under different working conditions.

[0019] The internal space of the cylinder of the device is used to fill resin, the amount of resin filled in the device is basically the same, and the performance difference between the produced membraneless electrodeionization devices is small.

[0020] The composite cover plate applies force to the middle resin layer more evenly, and the water distribution, water flow, regeneration and other properties between the resin layers maintain good consistency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Attached Figure 1 It is a structural diagram of the present invention.

[0022] In the figure: an upper interface (1), an upper cable sealing joint (2), a top cover plate (3), an upper O-ring (4), an upper electrode connecting rod (5), a first upper connecting bolt (6), a second upper connecting bolt (7), an upper porous pressing plate (8), an upper resin filter plate (9), an upper electrode mesh (10), a cylindrical shell (11), an ion exchange resin layer (12), a lower electrode mesh (13), a lower resin filter plate (14), a lower porous pressing plate (15), a second lower connecting bolt (16), a first lower connecting bolt (17), a lower electrode connecting rod (18), a lower O-ring (19), a bottom cover plate (20), a lower cable sealing joint (21), a lower interface (22), a top cover plate fastening bolt (23), and a bottom cover plate fastening bolt (24). DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the accompanying drawings and specific implementations.

[0024] Specific implementation: Figure 1 As shown, the device includes a composite top cover, a composite bottom cover, a cylindrical shell 11 and an ion exchange resin layer. The upper end of the cylindrical shell 11 is provided with a composite top cover, and the lower end is provided with a composite bottom cover. The composite top cover and the composite bottom cover have the same structure and are symmetrically arranged at the middle and two ends of the cylindrical shell 11. The cylindrical shell 11 is filled with an ion exchange resin layer 12. The composite top cover and the composite bottom cover are pressed toward the middle of the cylindrical shell 11 at both ends of the cylindrical shell 11, thereby pressing the ion exchange resin layer.

[0025] The composite top cover comprises an upper interface 1, an upper cable sealing joint 2, a top cover plate 3, an upper electrode connecting rod 5, an upper porous pressing plate 8, an upper resin filter plate 9 and an upper electrode mesh 10; the periphery of the top cover plate 3 is fixed to the upper end surface of the cylindrical shell 11 by means of top cover plate fastening bolts 23, and an annular column base is provided at the top cover plate 3 close to the inner circumference of the cylindrical shell 11, and the annular column base and the inner circumference of the cylindrical shell 11 are in close contact; an upper O-ring 4 is installed between the top cover plate 3 and the upper end surface of the cylindrical shell 11 between the annular column base and the top cover plate fastening bolts 23, and the lower end surface of the top cover plate 3 and the upper end surface of the cylindrical shell 11 are sealed by the upper O-ring 4; an upper porous pressing plate 8 and an upper resin filter plate 9 are installed in the cylindrical shell 11 below the top cover plate 3 from top to bottom, and the upper porous pressing plate 8 is located in the annular column base, the upper porous pressure plate 8 is fixedly connected to the lower end surface of the top cover plate 3 by the first upper connecting bolt 6, and the upper porous pressure plate 8 is provided with a plurality of through holes along the axial direction of the cylindrical shell 11, and the through holes are arranged at intervals; the upper resin filter plate 9 and the upper electrode net 10 are fixedly connected to the upper porous pressure plate 8 by the second upper connecting bolt 7; a through hole is provided at the center of the top cover plate 3 as an upper interface 1, and the upper interface 1 serves as the water inlet and outlet connection port of the equipment; a through hole is provided at the eccentric position of the top cover plate 3 as an upper cable sealing joint 2, and the lower cable sealing joint 21 is used to connect an external power supply, and an upper electrode connecting rod 5 is installed in the upper cable sealing joint 2, and the upper electrode connecting rod 5 passes downward through the upper porous pressure plate 8, the upper resin filter plate 9, and the upper electrode net 10 in sequence and is finally fastened to the upper electrode net 10.

[0026] The composite top cover comprises a lower interface 22, a lower cable sealing joint 21, a bottom cover plate 20, a lower electrode connecting rod 18, a lower porous pressure plate 15, a lower resin filter plate 14 and a lower electrode mesh 13; the periphery of the bottom cover plate 20 is fixed to the lower end surface of the cylindrical shell 11 by means of bottom cover plate fastening bolts 24, and an annular column base is provided at the bottom cover plate 20 close to the inner circumference of the cylindrical shell 11, and the annular column base and the inner circumference of the cylindrical shell 11 are in close contact; a lower O-ring 19 is installed between the bottom cover plate 20 and the lower end surface of the cylindrical shell 11 between the annular column base and the bottom cover plate fastening bolts 24, and the upper end surface of the bottom cover plate 20 and the lower end surface of the cylindrical shell 11 are sealed by the lower O-ring 19; a lower porous pressure plate 15 and a lower resin filter plate 14 are sequentially installed in the cylindrical shell 11 above the bottom cover plate 20 from bottom to top, and the lower resin filter plate 14 is closer to the cylindrical shell 11 than the lower porous pressure plate 15. At the center of the shell 11, the lower porous pressure plate 15 is located in the annular column platform, and the lower porous pressure plate 15 is fixedly connected to the lower end face of the bottom cover plate 20 by the first lower connecting bolt 17. The lower porous pressure plate 15 is provided with a plurality of through holes along the axial direction of the cylindrical shell 11, and the through holes are arranged at intervals; the lower resin filter plate 14 and the lower electrode net 13 are fixedly connected to the lower porous pressure plate 15 by the second lower connecting bolt 16, and a through hole is provided at the center of the bottom cover plate 20 as a lower interface 22, and the lower interface 22 is connected to the water inlet and outlet connection ports of the equipment; a through hole is provided at an eccentric position of the bottom cover plate 20 as a lower cable sealing joint 21, and the lower cable sealing joint 21 is used to connect an external power supply, and a lower electrode connecting rod 18 is installed in the lower cable sealing joint 21, and the lower electrode connecting rod 18 passes through the lower porous pressure plate 15, the lower resin filter plate 14, and the lower electrode net 13 in sequence upward and is finally fastened to the lower electrode net 13.

[0027] The upper electrode net 10 is connected to the external power supply through the upper electrode connecting rod 5 and the upper cable sealing joint 2, and the lower electrode net 13 is connected to the external power supply through the lower electrode connecting rod 18 and the lower cable sealing joint 21. In a specific implementation, one electrode of the upper electrode net 10 and the lower electrode net 13 is an anode and the other electrode is a cathode, which are respectively connected to the two ends of the external power supply, and the electrode polarity is switched during the operation of the membraneless electrodeionization device.

[0028] The ion exchange resin layer 12 contains at least one cation exchange resin and one anion exchange resin. The details are as follows:

[0029] The ion exchange resin layer 12 is filled with anion and cation exchange resins uniformly mixed together; or anion and cation exchange resins of different proportions or different types are uniformly mixed and then filled in multiple layers; or cation exchange resins and anion exchange resins are filled in multiple layers in an alternating manner, that is, cation exchange resins, anion exchange resins, cation exchange resins, anion exchange resins... are filled in multiple layers in an alternating manner, which can block the reverse electrical migration of ions; or yin and yang uniformly mixed resins, anion resins or cation resins, yin and yang uniformly mixed resins, anion resins or cation resins... are filled in multiple layers in an alternating manner, and the yin and yang uniformly mixed resins are formed by uniformly mixing anion and cation exchange resins.

[0030] Composite top cover / composite bottom cover, use bolts to fix the porous plate and cover plate, use bolts to fix the porous plate and resin filter plate and electrode net, and the cover plate, porous plate, resin filter plate and electrode net become a whole to form a composite top cover / composite bottom cover. The position and number of bolts are reasonably allocated according to the size of the porous plate, resin filter plate and electrode net to ensure that the entire composite top cover / composite bottom cover is evenly stressed.

[0031] The composite top cover / composite bottom cover is fixed together with the cylindrical shell through their respective top cover plate fastening bolts / bottom cover plate fastening bolts. The position and number of the bolts are reasonably allocated according to the sizes of the cover plate and the cylindrical shell to ensure that the fitting surfaces of the composite top cover / composite bottom cover and the cylindrical shell are evenly stressed.

[0032] The top cover plate fastening bolts 23 / bottom cover plate fastening bolts 24 use other fastening components, such as quick-release bolts, clamps, etc., to fix the cover plate and the shell.

[0033] In a specific implementation, the composite top cover / composite bottom cover at both ends compresses the resin layer filled in the middle. After a fixed volume of resin is filled, the composite top cover / composite bottom cover at both ends are locked. The pressure of the entire resin layer will form a constant pressure under the extrusion of the composite cover plates at both ends.

[0034] The size of the set pressure of the resin layer can be adjusted by adding or removing a certain amount of resin. In the production process, the volume of resin can be quantified to ensure good consistency in water production performance, regeneration voltage and current among various devices.

[0035] When its service life reaches its limit, the service life can be extended by replacing the internal resin layer. Because the composite cover is integrated, the process of replacing the resin is relatively simple and quick.

[0036] The resin layer in the membraneless electrodeionization device of the present invention can be evenly compressed under the action of the composite top cover and the composite bottom cover of the above structure, and the upper and lower resin particles can always maintain close contact, which can effectively reduce various adverse water flow distribution conditions caused by uneven pressure distribution in the resin layer, effectively ensure the good regeneration of the resin layer, and achieve outstanding and significant technical effects.

[0037] Furthermore, the membraneless electrodeionization device of the present invention has a simpler structure and is easier to install and maintain than previous electrodeionization devices.

[0038] For those skilled in the art, various other corresponding changes and deformations can be made according to the technical solutions and concepts described above, and all of these changes and deformations should fall within the scope of protection of the claims of this patent.

Claims

1. A membraneless electrodeionization device structure, characterized in that: The invention comprises a composite top cover, a composite bottom cover, a cylindrical shell (11) and an ion exchange resin layer, wherein the composite top cover is provided at the upper end of the cylindrical shell (11) and the composite bottom cover is provided at the lower end, the composite top cover and the composite bottom cover have the same structure and are symmetrically arranged at the middle and two ends of the cylindrical shell (11), the cylindrical shell (11) is filled with an ion exchange resin layer (12), and the composite top cover and the composite bottom cover are pressed toward the middle of the cylindrical shell (11) at both ends of the cylindrical shell (11), thereby pressing the ion exchange resin layer; The composite top cover comprises an upper interface (1), an upper cable sealing joint (2), a top cover plate (3), an upper electrode connecting rod (5), an upper porous pressing plate (8), an upper resin filter plate (9) and an upper electrode net (10); the periphery of the top cover plate (3) is fixed to the upper end surface of the cylindrical shell (11) by means of top cover plate fastening bolts (23); an annular column base is provided at the top cover plate (3) close to the inner periphery of the cylindrical shell (11); the annular column base and the inner periphery of the cylindrical shell (11) are in close contact; an upper O-ring (4) is installed between the top cover plate (3) and the upper end surface of the cylindrical shell (11) between the annular column base and the top cover plate fastening bolts (23); the upper porous pressing plate (8) and the upper resin filter plate (9) are installed in the cylindrical shell (11) below the top cover plate (3) from top to bottom. The upper porous pressing plate (8) is fixedly connected to the lower end surface of the top cover plate (3) via a first upper connecting bolt (6), and the upper porous pressing plate (8) is provided with a plurality of through holes along the axial direction of the cylindrical shell (11), and the through holes are arranged at intervals; the upper resin filter plate (9) and the upper electrode net (10) are fixedly connected to the upper porous pressing plate (8) via a second upper connecting bolt (7); a through hole is provided at the center of the top cover plate (3) as an upper interface (1); a through hole is provided at an eccentric position of the top cover plate (3) as an upper cable sealing joint (2), and an upper electrode connecting rod (5) is installed in the upper cable sealing joint (2), and the upper electrode connecting rod (5) passes downward through the upper porous pressing plate (8), the upper resin filter plate (9), and the upper electrode net (10) in sequence, and is finally fastened to the upper electrode net (10); The composite top cover comprises a lower interface (22), a lower cable sealing joint (21), a bottom cover plate (20), a lower electrode connecting rod (18), a lower porous pressing plate (15), a lower resin filter plate (14) and a lower electrode net (13); the periphery of the bottom cover plate (20) is fixed to the lower end surface of the cylindrical shell (11) by means of bottom cover plate fastening bolts (24); an annular column base is provided at the bottom cover plate (20) close to the inner periphery of the cylindrical shell (11); the annular column base and the inner periphery of the cylindrical shell (11) are in close contact; a lower O-ring (19) is installed between the bottom cover plate (20) and the lower end surface of the cylindrical shell (11) between the annular column base and the bottom cover plate fastening bolts (24); the cylindrical shell (11) above the bottom cover plate (20) is provided with a lower porous pressing plate (15) and a lower resin filter plate (14) in sequence from bottom to top. 4), the lower porous pressing plate (15) is fixedly connected to the lower end surface of the bottom cover plate (20) via a first lower connecting bolt (17), and the lower porous pressing plate (15) is provided with a plurality of through holes along the axial direction of the cylindrical shell (11), and the through holes are arranged at intervals; the lower resin filter plate (14) and the lower electrode net (13) are fixedly connected to the lower porous pressing plate (15) via a second lower connecting bolt (16), and a through hole is provided at the center of the bottom cover plate (20) as a lower interface (22); a through hole is provided at an eccentric position of the bottom cover plate (20) as a lower cable sealing joint (21), and a lower electrode connecting rod (18) is installed in the lower cable sealing joint (21), and the lower electrode connecting rod (18) passes through the lower porous pressing plate (15), the lower resin filter plate (14), and the lower electrode net (13) in sequence upwards and is finally fastened to the lower electrode net (13); The ion exchange resin layer (12) contains at least one cation exchange resin and one anion exchange resin; In the upper electrode net (10) and the lower electrode net (13), one electrode is an anode and the other electrode is a cathode, which are respectively connected to two ends of an external power supply, and the electrode polarity is switched during the operation of the membraneless electrodeionization device.

2. A membraneless electrodeionization device structure according to claim 1, characterized in that: The ion exchange resin layer (12) is filled with anion and cation exchange resins that are uniformly mixed; or anion and cation exchange resins of different proportions or different types are uniformly mixed and then filled in multiple layers; or cation exchange resins and anion exchange resins are filled in multiple layers in an alternating manner; or cation exchange resins and anion exchange resins are filled in multiple layers in an alternating manner; or cation exchange resins and anion exchange resins are filled in multiple layers in an alternating manner, wherein cation exchange resins and anion exchange resins are uniformly mixed, anion resins or cation resins, cation exchange resins and anion exchange resins are uniformly mixed, and cation exchange resins and anion exchange resins are filled in multiple layers in an alternating manner.

3. The membraneless electrodeionization device structure according to claim 1, characterized in that: The upper electrode net (10) is connected to an external power source via an upper electrode connecting rod (5) and an upper cable sealing joint (2), and the lower electrode net (13) is connected to an external power source via a lower electrode connecting rod (18) and a lower cable sealing joint (21).

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