Metal shell and insulating lining layer compounded electric hybrid bed

Abstract

The invention discloses an electric mixing bed compounded by a metal shell and an insulating lining layer. The electric mixing bed comprises a box body, a cover plate, negative and positive electrodes, an upper water distribution assembly, a lower water distribution assembly and an ion exchange resin layer filled between the upper water distribution assembly and the lower water distribution assembly, an opening is only formed in the top of the box body, the interior of the box body is in a cuboid shape, and the cover plate covers the opening; and the box body adopts a composite structure shell consisting of a first insulating lining layer and a metal shell of which the outer wall surface is provided with a first reinforcing rib. The composite material structure formed by combining the metal shell with the reinforcing ribs and the insulating lining layer is used for replacing a traditional shell structure made of a single insulating material, the good insulating performance is kept, meanwhile, the mechanical strength is remarkably enhanced, and the problems that a traditional device is difficult to achieve large scale, the height of a resin layer is limited, and the pressure bearing capacity is insufficient are effectively solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water treatment, in particular to an electric mixed bed with a metal shell and an insulating inner lining. BACKGROUND

[0002] The electric mixed bed (also known as membraneless EDI) is a new deep desalination technology. Compared with conventional EDI, this technology has the advantages of simple structure, low manufacturing cost, easy maintenance, long service life, no need for acid washing, high water recovery rate, low energy consumption, etc., and has been industrialized in the power, chemical, papermaking and other industries.

[0003] However, both conventional EDI devices and electric mixed beds (such as the membraneless EDI devices disclosed in CN102153166A, CN102583646A, CN104445535A, and CN111422950A) generally use insulating materials to make frame plates and housings, and both have some significant defects in actual application.

[0004] Firstly, due to the limitations of the strength of insulating materials and manufacturing processes, conventional EDI devices and electric mixed beds with frame plates or housings made of insulating materials such as UPVC, ABS, PP, reinforced nylon, and glass steel are difficult to be large, and the maximum water production flow of a single device is generally not more than 8m 3 / h. When such products are used for large-scale high-purity water treatment, the number of devices is large, the pipeline and control are complex, the investment cost is high, and maintenance is not conducive.

[0005] Secondly, due to the limited size of the device, the resin layer height of the existing conventional EDI devices and electric mixed beds is generally low, usually less than 0.5m, and the water quality has strict requirements. In actual application, when the water conductivity reaches 7-8μs / cm, the water quality will decrease significantly under the condition that the treatment flow remains unchanged.

[0006] Thirdly, due to the limitations of the strength and deformation of insulating materials, the maximum pressure of conventional EDI devices and electric mixed beds is usually only 0.7 MPa, which cannot adapt to high-pressure application scenarios. For example, the outlet pressure of the condensate pump in a large power plant can be as high as 2.0-4.0MPa, so when the existing conventional EDI device or electric mixed bed is used to treat high-pressure condensate water, it is necessary to take measures to reduce the pressure of the condensate system, and then increase the pressure after treatment, which leads to system complexity, energy consumption, and safety and reliability.

[0007] In addition, due to the limitations of the manufacturing process, the existing conventional EDI and electric mixed bed adopts a double-open double-cover plate design, which leads to complex device structure, increased installation workload, and reduced sealing performance. SUMMARY

[0008] The application provides an electric mixed bed with a metal shell and an insulating inner lining layer to solve the problems of large size, limited resin layer height, insufficient pressure bearing capacity and the like of a traditional device caused by the separate use of an insulating frame plate or a shell. The application is suitable for high-purity water treatment in the power, electronic, chemical, papermaking and other industries, and is particularly suitable for efficient deep desalination in a high-pressure scenario with large flow and relatively poor water quality.

[0009] The application provides an electric mixed bed with a metal shell and an insulating inner lining layer, which comprises a box body, a cover plate, positive and negative electrodes, an upper water distribution assembly, a lower water distribution assembly and an ion exchange resin layer filled between the upper water distribution assembly and the lower water distribution assembly. The box body is only provided with an opening at the top and has a rectangular shape inside, and the cover plate is combined with the opening. The box body adopts a composite structure shell composed of a first insulating inner lining layer and a metal shell with a first reinforcing rib on the outer wall surface.

[0010] The application is only provided with an opening at the top of the box body, and the cover plate is combined above the opening of the box body. The box body adopts a composite structure of a metal shell with a reinforcing rib and an insulating inner lining layer. The composite material structure of the metal shell with a reinforcing rib and the insulating inner lining layer is used to replace the traditional single insulating material shell structure, which significantly enhances the mechanical strength while maintaining good insulating performance, effectively solves the problems of large size, limited resin layer height and insufficient pressure bearing capacity of the traditional device, and the processing flow of a single device can be designed to be any value in the range of 8 m 3 / h to 200 m 3 / h. The pressure bearing capacity of the device can be designed to be any value not more than 8 MPa according to actual needs. The resin filling height is increased from less than 0.5 m to 0.5-1.5 m.

[0011] The following also provides several optional modes, but not as an additional limitation to the above general scheme, but only as a further supplement or preference, and each optional mode can be combined with the above general scheme or combined between multiple optional modes without technical or logical contradiction.

[0012] Optionally, the metal shell is a stainless steel shell or a carbon steel shell, the metal shell is manufactured by welding or integral casting, and the first insulating inner lining layer is tightly attached to the inner surface of the metal shell by rolling, pasting or welding.

[0013] Optionally, the wall thickness of the metal shell is 3-30 mm, and the thickness of the first insulating inner lining layer is 2-10 mm.

[0014] Optionally, the first reinforcing rib is arranged on the outer side wall and bottom wall of the box body.

[0015] Optionally, the cover plate adopts a composite structure composed of a second insulating inner lining and a metal flat plate with second reinforcing ribs on the outer wall surface or adopts a high mechanical strength insulating material to be integrally formed; the cover plate is provided with an upper pipeline interface.

[0016] Optionally, the metal flat plate is a stainless steel plate or a carbon steel plate; the second insulating inner lining is tightly attached to the inner surface of the metal flat plate by rolling or pasting.

[0017] Optionally, the thickness of the metal flat plate is 6-30 mm; the thickness of the second insulating inner lining is 2-10 mm.

[0018] Optionally, the high mechanical strength insulating material can be selected from glass steel, PEEK and other materials with similar high strength and insulating double performance.

[0019] Optionally, the first reinforcing rib and the second reinforcing rib are one or more combinations of steel bars, rectangular steel pipes, angle steels, H-shaped steels or channel steels; they are arranged in multiple rows in parallel, longitudinal and transverse grid shape or in the form of multiple rows in parallel combined with a frame.

[0020] Further, the first reinforcing rib is a steel bar or a rectangular steel pipe, which is arranged uniformly in vertical and horizontal directions on the outer side of the side wall or arranged in multiple rows in parallel with the same order and the same height of the four outer reinforcing ribs, forming multiple closed loop structures in parallel and uniformly distributed; the outer side of the bottom plate is arranged uniformly in length and width directions; the net spacing between the ribs is about 40-200 mm; the second reinforcing rib is a steel bar or a rectangular steel pipe, which is arranged uniformly in length and width directions; the net spacing between the ribs is about 40-200 mm.

[0021] Optionally, the material of the first insulating inner lining and the second insulating inner lining is one or more combinations of polyethylene, polypropylene, polytetrafluoroethylene, ABS, UPVC, rubber and glass steel and other insulating materials.

[0022] Optionally, the height of the ion exchange resin layer is 0.5-1.5 m.

[0023] The application adopts a composite shell structure of a metal shell and an insulating inner lining, which significantly improves the pressure-bearing capacity of the device, realizes the large-scale of the device, and the height of the ion exchange resin layer can be increased to 0.5-1.5 m, which can significantly relax the requirements for water quality and broaden the application range of the device; without setting an ion exchange membrane between the electrode and the resin layer or setting other auxiliary components inside the resin layer, the internal structure of the electric-mixed bed is significantly simplified; at the same time, the regeneration frequency can be significantly reduced, which is conducive to improving the water recovery rate and reducing energy consumption.

[0024] Optionally, the anode and the cathode are tightly attached to the inner side of one of the opposite side walls of the box.

[0025] Optionally, the anode and cathode each have a terminal block, and each of the opposite sidewalls has a through hole for penetrating the terminal block.

[0026] Two terminals pass through corresponding through holes and connect to their respective electrodes, with the terminals and through holes being insulated and sealed. Optionally, the terminals are secured to the outer wall of the housing with nuts and washers; the terminals and corresponding through holes are sealed with insulating gaskets, O-rings, and / or waterproof sealant. In this application, since the electrodes are no longer located on the water flow channel, either mesh electrodes or plate electrodes are acceptable.

[0027] Optionally, the upper water distribution assembly is fixed to the lower side of the cover plate; the lower water distribution assembly is fixed to the bottom of the tank; and the bottom of the tank is provided with a lower pipe interface that penetrates the bottom plate.

[0028] Optionally, the upper water distribution assembly includes an upper fixing plate, an upper water distribution plate support, an upper perforated water distribution plate, and an upper resin retainer stacked sequentially. The upper fixing plate has a water passage hole corresponding to the upper pipe interface. The upper fixing plate, the upper water distribution plate support, the upper perforated water distribution plate, and the upper resin retainer are assembled into a whole and fixed to the lower side of the cover plate with the upper resin retainer facing downward.

[0029] Optionally, the lower water distribution assembly includes a lower fixed plate, a lower water distribution plate support, a lower porous water distribution plate, and a lower resin retainer stacked sequentially. The lower fixed plate has a water passage hole corresponding to the lower pipe interface. The lower fixed plate, the lower water distribution plate support, the lower porous water distribution plate, and the lower resin retainer are assembled into a whole and fixed to the bottom of the box body with the lower resin retainer facing upward.

[0030] Optionally, the upper water distribution plate support, the upper perforated water distribution plate, and the upper resin retainer are fixed to the upper fixing plate by upper hexagonal bolts.

[0031] Optionally, the exposed head of the upper hex bolt is sealed with waterproof sealant.

[0032] Optionally, the upper resin retainer is in close contact with the upper porous water distribution plate, and the upper water distribution plate support is supported between the upper porous water distribution plate and the upper fixed plate; the upper water distribution plate support includes an edge sealing support located at the edge and other central support members evenly distributed between the upper porous water distribution plate and the upper fixed plate.

[0033] Optionally, the height of the upper water distribution plate support is 20-50mm.

[0034] Optionally, the lower resin retainer, the lower porous water distribution plate, and the lower water distribution plate support are fixed to the lower fixing plate by lower hexagonal bolts.

[0035] Optionally, the exposed head of the lower hexagonal bolt is blocked by waterproof sealant.

[0036] Optionally, the lower fixing plate is fixed to the bottom lining of the box by adhesion.

[0037] Optionally, the lower resin interception member is in close contact with the lower porous water distribution plate, and the lower water distribution plate support is supported between the lower porous water distribution plate and the lower fixing plate; the lower water distribution plate support includes edge sealing supports at the edges and central supports uniformly distributed between the lower porous water distribution plate and the lower fixing plate.

[0038] Optionally, the height of the lower water distribution plate support is 20-50 mm.

[0039] In the upper water distribution assembly and the lower water distribution assembly: Optionally, the edge sealing support is a frame structure with a height of 20-50 mm and a width of 12-20 mm, and M4-M8 bolt holes with a center distance of 50-200 mm are vertically arranged on the frame structure.

[0040] Optionally, the central support is a cylinder with an outer diameter of 12-30 mm and a height of 20-50 mm, and M4-M8 bolt holes are arranged on the cylinder.

[0041] Optionally, the upper porous water distribution plate and the lower porous water distribution plate each have a height of 8-30 mm, and water distribution holes with a center distance of 20-30 mm and a diameter of 8-20 mm are arranged on the upper porous water distribution plate and the lower porous water distribution plate.

[0042] Optionally, the upper resin interception member and the lower resin interception member are both gap plates capable of effectively intercepting ion exchange resin particles, and the gap width is 0.3-0.4 mm.

[0043] Regarding the fixing method between the upper fixing plate and the cover plate, optionally, high-strength insulating bolts or / and waterproof sealant are used to directly tightly fix the upper fixing plate to the lower side of the cover plate, or the top outer edge of the box, the outer edge of the cover plate, and the outer edge of the upper fixing plate all adopt a rectangular flange structure, upper and lower sealing gaskets are arranged between the upper fixing plate and the cover plate and the box, and the cover plate, the upper fixing plate, and the box are fastened and sealed by a bolt assembly.

[0044] Optionally, the upper pipe interface and the lower pipe interface both adopt a flange structure; the sealing surface of the flange and the inner side surface of the pipe part both have an insulating lining.

[0045] Optionally, the box has support feet. The support feet are downward extensions of the reinforcing ribs at the corners of the metal shell of the box, or are fixed to the bottom of the metal shell of the box by welding, and are used to directly and stably support the device on the ground.

[0046] The device of the present application adopts two operation modes of treatment and electrochemical regeneration: In the treatment mode, the water flow path is in turn: upper pipe interface→upper porous water distribution plate→upper resin interception piece→ion exchange resin layer→lower resin interception piece→lower porous water distribution plate→lower pipe interface; In the electrochemical regeneration mode, the water flow path is opposite to that in the treatment mode.

[0047] Compared with the existing membrane-free electrodeionization equipment, the present application has at least one of the following beneficial effects: (1) The device is realized in large scale: the single device treatment flow can be increased from the existing 8 t / h to 8-200 t / h, which fundamentally solves the limitation of the traditional device "small flow, multiple modules", when the total treatment flow is 1000 t / h, if a single water production of 100 t / h is used, the number of devices can be reduced from 125 to 10, thereby reducing the number of valves, flow meters, pressure gauges and pipe fittings by 92%, the control system is significantly simplified, and the rack can be omitted, and the system investment cost is reduced by more than 30%.

[0048] (2) High pressure working condition adaptation: the pressure bearing capacity of up to 8 MPa can directly connect the electrodeionization bed to the condensate water high-pressure system of the power plant for treatment, without the need to take pressure reduction measures, and without the need to re-pressurize after treatment, which not only saves energy consumption, but also improves the safety and reliability of the condensate water system operation.

[0049] (3) Performance is significantly improved: the resin filling height is increased from less than 0.5 m in the traditional device to 0.5-1.5 m, which can significantly relax the requirements for the water quality, broaden the application range of the device, and significantly reduce the regeneration frequency, which is conducive to improving the water recovery rate and reducing the energy consumption. BRIEF DESCRIPTION OF DRAWINGS

[0050] Figure 1 It is a front view of the electrodeionization bed of the present application.

[0051] Figure 2 It is a top view of the electrodeionization bed of the present application.

[0052] Figure 3 It is a left view of the electrodeionization bed of the present application.

[0053] Figure 4 And Figure 5 is Figure 1 the sectional view in I-I direction.

[0054] The reference signs shown in the figure are as follows: 1, box body: 11, metal shell, 12, first insulating inner lining, 13, first reinforcing rib, 14, lower pipe interface, 15, third insulating inner lining, 16, support foot; 2. Cover plate: 21. Metal cover plate, 22. Second insulating inner lining layer, 23. Second reinforcing rib, 24. Upper pipe interface, 25. Fourth insulating inner lining layer; 3. Upper water distribution assembly: 31. Upper resin retainer, 32. Upper perforated water distribution plate, 33. Upper water distribution plate frame support, 34. Upper water distribution plate center support, 35. Upper fixing plate, 36. Upper hexagon socket bolts; 4. Lower water distribution assembly: 41. Lower resin retainer; 42. Lower perforated water distribution plate; 43. Lower water distribution plate frame support; 44. Lower water distribution plate center support; 45. Lower fixing plate; 46. Lower hexagon socket head cap bolt; 5. Electrodes: 51. Anode, 52. Cathode, 53. Terminal, 54. Through hole, 55. Nut, 56. Washer; 6. Ion exchange resin layer; 7. Install the sealing gasket; 8. Lower sealing gasket; 9. Bolt assembly. Detailed Implementation

[0055] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0056] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0057] like Figures 1-5 As shown, an electric hybrid bed with a composite metal shell and an insulating inner liner is described. (See also...) Figure 1 , Figure 4 and Figure 5, including a box 1, a cover plate 2, an upper water distribution assembly 3, a lower water distribution assembly 4, an electrode 5 and an ion exchange resin layer 6. The shell of the box 1 is a composite shell composed of a metal shell 11 and a first insulating inner lining 12, the outer wall of the metal shell is provided with a first reinforcing rib 13, the box is only provided with an opening at the top, the inside is in the shape of a cuboid, the box has a bottom wall, opposite side walls and a lower pipe interface 14 penetrating the bottom wall of the box; the upper water distribution assembly 3 is fixed to the lower side of the cover plate 2, the lower water distribution assembly 4 is fixed to the bottom inside the box 1, the upper water distribution assembly 3 and the lower water distribution assembly 4 are both used for water distribution and ion exchange resin interception; the electrode 5 includes an anode 51 and a cathode 52, which are respectively close to the inner side of the aforementioned opposite side walls; the ion exchange resin layer 6 is tightly filled in the space between the upper water distribution assembly 3 and the lower water distribution assembly 4; the cover plate 2 is covered above the opening of the box, and the center of the cover plate 2 has an upper pipe interface 24 penetrating the cover plate.

[0058] The box of the present application is only provided with an opening at the top, and the cover plate is covered above the opening of the box; the box adopts a composite structure of a metal shell with a first reinforcing rib and an insulating inner lining. The metal shell is made of stainless steel or carbon steel; the material of the first insulating inner lining 12 is one or more combinations of polyethylene, polypropylene, polytetrafluoroethylene, ABS, UPVC, rubber and glass steel, etc. The metal shell of the box can be made by welding or integral casting, and the first insulating inner lining 12 can be fixed to the inner surface of the metal shell by rolling, pasting or welding. The composite material structure of the metal shell combined with the insulating inner lining replaces the traditional single insulating material shell structure, which significantly enhances the mechanical strength while maintaining good insulation performance.

[0059] The outer surface of the metal shell 11 has a first reinforcing rib 13, in some embodiments, the first reinforcing rib 13 is distributed on the outer side of the side wall and the outer side of the bottom plate of the box, see Figures 1-3 As an embodiment of the reinforcing rib, the first reinforcing rib 13 can be one or more combinations of steel bars, rectangular steel pipes, angle steels, H-shaped steels or channel steels, which can be arranged in multiple rows in parallel, longitudinal and transverse grid shape or edge frame combined with multiple rows in parallel. In some embodiments, the first reinforcing rib is a rectangular steel pipe or a steel bar, which is arranged uniformly in vertical and horizontal directions on the outer side of the side wall, and uniformly in length and width directions on the outer side of the bottom plate, with a net spacing of about 40-200mm between the ribs.

[0060] The bottom of the box 1 has supporting feet 16, in some embodiments, the supporting feet 16 are downward extensions of the reinforcing ribs at the corners of the metal shell of the box, which are used to directly and stably support the device on the ground.

[0061] In some embodiments, the cover plate can adopt a composite structure composed of a second insulating inner lining layer and a metal flat plate with second reinforcing ribs on the outer wall surface; in other embodiments, the cover plate can also adopt a high-mechanical-strength insulating material integrally formed. In the embodiments adopting the composite structure of the metal flat plate and the insulating inner lining layer, see Figure 5 The metal flat plate 21 is a stainless steel plate or a carbon steel plate, and the metal flat plate 21 has second reinforcing ribs 23 on the outer wall surface; the second insulating inner lining layer 22 is made of one or more combinations of polyethylene, polypropylene, polytetrafluoroethylene, ABS, UPVC, rubber, and glass steel, and can be tightly attached to the inner surface of the metal flat plate 21 by rolling or pasting.

[0062] The second reinforcing ribs 23 can be one or more combinations of steel bars, rectangular steel pipes, angle steels, H-shaped steels, or channel steels, and can be arranged in multiple rows in parallel, in a longitudinal and transverse grid shape, or in a combination of multiple rows in parallel and a frame. In some embodiments, the second reinforcing ribs are steel bars or rectangular steel pipes, which are arranged in a uniform cross pattern in the length and width directions, and the distance between the ribs is about 40-200 mm.

[0063] In some embodiments, the wall thickness of the metal shell is 3-30 mm, the thickness of the metal flat plate is 6-30 mm, and the thicknesses of the first and second insulating inner lining layers are 2-10 mm. In this thickness range, the mechanical strength and insulation performance of the device can be better balanced.

[0064] As an embodiment of the box, the box can adopt a vertical cuboid box with an open top, a bottom wall, and two pairs of opposite side walls. An electrode 5 is arranged on the inner side of one of the opposite side walls, and the electrode includes an anode 51 and a cathode 52, which are tightly fixed to the surface of the first insulating inner lining layer of the corresponding side wall. The two side walls where the electrode is arranged each have a through hole 54, and two terminal pins 53 pass through the corresponding through holes and are connected to the corresponding electrodes. The terminal pins are fastened by nuts 55 and insulating gaskets 56 at the outer wall of the box, and the space between the terminal pins and the corresponding through holes is sealed by insulating sealing gaskets, O-shaped sealing rings, or / and waterproof sealing glue. The electrode can be a mesh electrode or a plate electrode.

[0065] The upper water distribution assembly 3 and the lower water distribution assembly 4 are respectively located at the open end of the box and the bottom inside the box.

[0066] Referring to Figure 5The upper water distribution assembly 3 comprises an upper resin interception member 31, an upper porous water distribution plate 32, upper water distribution plate supports (an upper water distribution plate frame support 33 and an upper water distribution plate center support 34), and an upper fixed plate 35 having water passing holes corresponding to the upper pipe interface 24; the upper fixed plate 35, the upper water distribution plate supports (the upper water distribution plate frame support 33 and the upper water distribution plate center support 34), the upper porous water distribution plate 32, and the upper resin interception member 31 are sequentially stacked and assembled into an integral whole and installed at the open end of the box body with the upper resin interception member 31 facing downward, the upper fixed plate 35 is tightly connected between the cover plate 2, in some embodiments, the top outer edge of the box body 1, the outer edge of the cover plate 2, and the outer edge of the upper fixed plate 35 are all rectangular flange structures, the upper fixed plate 35 and the cover plate 2 and the box body 1 are respectively provided with upper sealing gaskets 7 and lower sealing gaskets 8, and the fastening and sealing of the cover plate 2, the upper fixed plate 35, and the box body 1 are realized through a bolt assembly 9.

[0067] One assembly method of the upper water distribution assembly 3, the upper resin interception member 31 is tightly attached to the upper porous water distribution plate 32, the upper water distribution plate supports are supported between the upper porous water distribution plate 32 and the upper fixed plate 35, the upper resin interception member 31, the upper porous water distribution plate 32, and the upper water distribution plate supports (the upper water distribution plate frame support 33 and the upper water distribution plate center support 34) are fixed to the upper fixed plate 35 through the upper inner hexagonal bolts 36, and the exposed head of the inner hexagonal bolt is blocked with waterproof sealing glue. The upper water distribution plate supports include the upper water distribution plate edge sealing supports 33 located at the edges and the upper water distribution plate center supports 34 uniformly distributed between the upper porous water distribution plate and the upper fixed plate. The height of the upper water distribution plate support is 20-50mm.

[0068] Referring to Figure 5 The lower water distribution assembly 4 comprises a lower fixed plate 45, lower water distribution plate supports (a lower water distribution plate frame support 43 and a lower water distribution plate center support 44), a lower porous water distribution plate 42, and a lower resin interception member 41, the lower fixed plate 45 has water passing holes corresponding to the lower pipe interface 14; the lower fixed plate 45, the lower water distribution plate supports (the lower water distribution plate frame support 43 and the lower water distribution plate center support 44), the lower porous water distribution plate 42, and the lower resin interception member 41 are sequentially stacked and assembled into an integral whole and fixed to the bottom of the box body with the lower resin interception member 41 facing upward, the lower fixed plate 45 is tightly connected between the bottom of the box body.

[0069] One assembly method of the lower water distribution assembly 4, the lower resin interception member 41 is tightly attached to the lower porous water distribution plate 42, the lower water distribution plate support is supported between the lower porous water distribution plate 42 and the lower fixed plate 45, the lower resin interception member 41, the lower porous water distribution plate 42 and the lower water distribution plate support (the lower water distribution plate edge frame support 43 and the lower water distribution plate center support 44) are fixed to the lower fixed plate 45 by the lower internal hexagonal bolt 46, the exposed head of the internal hexagonal bolt is blocked by waterproof sealing glue, and the lower fixed plate 45 is fixed on the bottom plate inner lining layer of the box body 1 by bonding. The lower water distribution plate support also includes the lower water distribution plate edge sealing support 43 located at the edge and the other lower water distribution plate center supports 44 evenly distributed between the lower porous water distribution plate and the lower fixed plate. The height of the lower water distribution plate support is 20-50mm.

[0070] In some embodiments, in the upper water distribution assembly 3 and the lower water distribution assembly 4: the edge sealing supports are all frame structures, 20-50mm high, 12-20mm wide, and vertically have M4-M8 bolt holes with a center distance of 50-200mm; the center supports are all cylinders with an outer diameter of 12-30mm and a height of 20-50mm, and have M4-M8 bolt holes in the center; the upper porous water distribution plate and the lower porous water distribution plate are 8-30mm high, and have water distribution holes with a center distance of 20-30mm and a diameter of 8-20mm; the upper resin interception member 31 and the lower resin interception member 41 are both gap plates that can effectively intercept ion exchange resin particles, and the gap width is 0.3-0.4mm.

[0071] The upper water distribution assembly 3 and the lower water distribution assembly 4 are pressed to fill the ion exchange resin, forming an ion exchange resin layer 6, and the space height between the upper water distribution assembly and the lower water distribution assembly is 0.5~1.5m, and the height of the fillable ion exchange resin layer 6 is 0.5-1.5m. The ion exchange resin is a mixed ion exchange resin of anions and cations.

[0072] The cover plate 2 top and the box body 1 bottom are respectively provided with an upper pipe interface 24 and a lower pipe interface 14, and in some embodiments, both of them adopt a flange structure; the sealing surface of all flanges and the inner side of the pipe part are provided with an insulation lining (the third insulation lining 15 and the fourth insulation lining 25).

[0073] The device adopts two operation modes of treatment and electrochemical regeneration: In the treatment mode, the water flow path is: upper pipe interface 24→upper porous water distribution plate 32→upper resin interception member 31→ion exchange resin layer 6→lower resin interception member 41→lower porous water distribution plate 42→lower pipe interface 14. The water flows from top to bottom through the ion exchange resin layer, and relies on the strong exchange adsorption capacity of the ion exchange resin to remove ionic substances in the water, and the treated pure water is discharged from the lower pipe interface.

[0074] In the electrochemical regeneration mode, the water flow path is opposite to the treatment mode. The electrodes are connected to the positive and negative poles of a direct current source, respectively, and the purified water flows from bottom to top through the ion exchange resin layer. At the same time, a strong direct current is applied to the resin layer, and the ions adsorbed in the resin quickly transfer from the inside of the resin to the water flow. Therefore, the negative and positive resins are efficiently regenerated.

[0075] Example 1 An electric mixed bed with a treatment flow of 100 m 3 / h and a pressure of 0.8 MPa is suitable for boiler makeup water and steam condensate water treatment in the field of chemical industry, and the maximum allowable water conductivity is about 20 μs / cm. The technical scheme of this example is as follows: Box structure: The effective space size inside the box is 1000 mm x 1000 mm x 950 mm, the resin layer filling height is 800 mm, and the composite structure of the metal shell welded by carbon steel plate and the first polyethylene insulation lining layer is tightly combined. The thickness of the metal shell steel plate is 10 mm, the thickness of the first polyethylene insulation lining layer is 8 mm, and the whole structure is formed by the roll molding process with the inner side of the metal shell.

[0076] The outer edge of the top of the box is an integrated rectangular flange structure, the flange edge width is 120 mm, the thickness is 60 mm, and it is seamlessly welded with the box body; the flange surface is processed flat, and M40 bolt holes are reserved, which are evenly distributed, and the flange sealing surface is covered with a polyethylene lining layer with a thickness of about 5 mm.

[0077] First reinforcing rib configuration of metal shell: rectangular steel pipes are selected and arranged uniformly in vertical and horizontal directions; the corner reinforcing ribs extend downward by 450 mm to form support feet, and 30 mm thick steel plate pads are welded at the bottom.

[0078] Cover plate structure: The cover plate is a 20 mm thick carbon steel flat plate, and the outer edge is provided with a rectangular flange structure matching the box flange.

[0079] Second reinforcing rib configuration of cover plate: rectangular steel pipes are selected and arranged in a grid shape.

[0080] The second insulation lining layer of the cover plate is 8 mm thick polyethylene, which is covered on the inner side of the carbon steel flat plate by roll molding.

[0081] Pipe interface: DN125 water pipe interfaces are provided on the top of the cover plate and the bottom of the box, respectively, and flange interfaces are used. The flange sealing surface and the inner side of the pipe are both provided with a polyethylene insulation lining layer with a thickness of about 5 mm.

[0082] Internal components: Upper and lower edge support frames: PP material is selected, M6 bolt holes are opened in the vertical direction, and the bolt hole spacing is about 75 mm.

[0083] Upper / lower porous water distribution plate: PP material is selected, the water distribution hole with an opening diameter of 18 mm is arranged, and the hole center spacing is about 30 mm.

[0084] Upper / lower center support: a cylindrical body with an M6 bolt hole in the center, an outer diameter of 25 mm, a PP material, and a cylindrical body center spacing of about 100 mm, for stable support of the porous water distribution plate.

[0085] Upper / lower fixed plate: glass steel material is selected, a circular water passage with a diameter of about 115 mm is arranged in the center, and is used to fix the porous water distribution plate and resin interception parts and other accessories.

[0086] Electrode: two opposite side walls of the box body are respectively provided with a through hole A and a through hole B with a diameter of about 30.2 mm; both electrodes are flat plate electrodes, wherein the anode is a titanium-based DSA electrode, and the cathode is a 316L stainless steel electrode, which are respectively tightly installed on the inner side wall of the through hole; the electrode terminal and the electrode are connected by electric welding to realize seamless electrical connection, the electrode terminal (with M30 thread) penetrates through the through hole, and the outer wall of the box body is fastened by a nut and a gasket; the back surface of the electrode and the surface of the corresponding insulating inner lining layer, and the electrode terminal and the corresponding through hole are sealed by an insulating waterproof sealant.

[0087] Example 2 A kind of processing flow 35m 3 / h, pressure 4.0 MPa for power plant condensate treatment of electric mixed bed. The technical scheme of this embodiment is as follows: Box structure: The effective space size of the box body is 600 mm x 600 mm x 1000 mm, the resin layer filling height is 850 mm, and the composite structure of the metal shell welded by carbon steel plate and the first polyethylene insulating lining layer is tightly combined; the thickness of the metal shell steel plate is 25 mm, the thickness of the first polyethylene insulating lining layer is 8 mm, and the whole structure is formed with the metal shell through the rotational molding process.

[0088] The outer edge of the open top of the box body is an integrated rectangular flange structure, the flange edge width is 150 mm, the thickness is 100 mm, and it is seamlessly welded with the box body main body; the flange surface is processed flat, M45 bolt holes are reserved, the hole positions are uniformly distributed, and the flange sealing surface is covered with a polyethylene lining layer with a thickness of about 5 mm.

[0089] Metal shell first reinforcing rib configuration: steel bar is selected and arranged in a grid shape.

[0090] Cover plate structure: The cover plate is a 30 mm thick carbon steel plate, and the outer edge is provided with a rectangular flange structure matched with the flange of the box body.

[0091] Cover plate second reinforcing rib configuration: steel bar, grid-like arrangement.

[0092] The second insulating inner lining layer is 8 mm thick polyethylene, which is covered on the inner side of the carbon steel flat plate by rotational molding.

[0093] Pipe interface: The cover plate top and the tank bottom are respectively provided with a DN80 water pipe interface, which adopts a flange interface, and the flange sealing surface and the inner side of the pipe are both provided with a polyethylene insulating lining layer with a thickness of about 5 mm.

[0094] Internal components: Upper and lower edge support frames: PP material is selected, M6 bolt holes are vertically arranged, and the bolt hole spacing is about 75 mm.

[0095] Upper / lower porous water distribution plate: PP material is selected, 18 mm diameter water distribution holes are opened, and the hole center spacing is about 30 mm.

[0096] Upper / lower center support: a cylindrical body with an M6 bolt hole in the center, an outer diameter of 25 mm, a PP material, a cylindrical body center spacing of about 100 mm, and used for stable support of the porous water distribution plate.

[0097] Upper / lower fixed plate: glass steel material is selected, a circular water passage with a diameter of about 70 mm is opened in the center, and used for fixing the porous water distribution plate and resin interception components.

[0098] Electrode: the two opposite side walls of the tank are respectively provided with a through hole A and a through hole B with a diameter of about 20.2 mm; both electrodes are flat plate electrodes, wherein the anode is a titanium-based DSA electrode, and the cathode is a 316L stainless steel electrode, which are respectively tightly installed on the inner side wall of the through hole; the electrode terminal and the electrode are connected by electric welding to realize seamless electrical connection, the electrode terminal (with M20 thread) passes through the through hole, and the outer wall of the tank is fastened with a nut and a gasket; the back surface of the electrode and the surface of the corresponding insulating inner lining layer, and the electrode terminal and the corresponding through hole are sealed with insulating waterproof sealant.

[0099] The above-described embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as limiting the scope of the patent. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the protection scope of the present patent should be subject to the appended claims.

Claims

1. A metal shell and insulation liner composite electric mixed bed, comprising a box, a cover plate, a negative electrode and a positive electrode, an upper water distribution assembly, a lower water distribution assembly and an ion exchange resin layer filled between the upper water distribution assembly and the lower water distribution assembly; characterized in that, The box is only provided with an open top, and has a cuboid shape, and the cover plate covers the open top; the box adopts a composite structure shell composed of a first insulating inner lining and a metal shell with a first reinforcing rib on the outer wall surface.

2. The electric hybrid bed of claim 1, wherein, The metal shell is a stainless steel shell or a carbon steel shell; the metal shell is manufactured by welding or integral casting; and the first insulating inner lining is tightly attached to the inner surface of the metal shell by rolling, pasting or welding.

3. The electric hybrid bed of claim 1, wherein, The wall thickness of the metal shell is 3-30 mm, and the thickness of the first insulating inner lining is 2-10 mm.

4. The electric hybrid bed of claim 1, wherein, The cover plate adopts a composite structure composed of a second insulating inner lining and a metal flat plate with a second reinforcing rib on the outer wall surface, or is integrally formed by a high-mechanical-strength insulating material; and the cover plate is provided with an upper pipeline interface.

5. The electric hybrid bed of claim 4, wherein, The metal flat plate is a stainless steel plate or a carbon steel plate; and the second insulating inner lining is tightly attached to the inner surface of the metal flat plate by rolling or pasting.

6. The electric hybrid bed of claim 4, wherein, The thickness of the metal flat plate is 6-30 mm, and the thickness of the second insulating inner lining is 2-10 mm.

7. The electric hybrid bed of claims 1 or 4, wherein, The first reinforcing rib and the second reinforcing rib are one or more combinations of a steel bar, a rectangular steel tube, an angle steel, an H-shaped steel or a channel steel; and are arranged in a plurality of rows in parallel, a longitudinal and transverse grid shape or a combination of a plurality of rows in parallel and a frame.

8. The electric hybrid bed of claim 1, wherein, The height of the ion exchange resin layer is 0.5-1.5 m.

9. The electric hybrid bed of claim 1, wherein, The cathode and the anode are tightly attached to the inner side of one of the opposite side walls of the box; the cathode and the anode respectively have a terminal, and the opposite side walls are respectively provided with a through hole for penetrating the terminal; the upper water distribution assembly is fixed to the lower side of the cover plate; the lower water distribution assembly is fixed to the bottom in the box; and the bottom of the box is provided with a lower pipeline interface penetrating the bottom plate.

10. The electric hybrid bed of claims 1 or 9, wherein, The upper water distribution assembly comprises an upper fixed plate, an upper water distribution plate support, an upper porous water distribution plate and an upper resin interception member which are sequentially stacked, the upper fixed plate has a water passing hole corresponding to the upper pipeline interface; the upper fixed plate, the upper water distribution plate support, the upper porous water distribution plate and the upper resin interception member are assembled into an integral whole and are fixed to the lower side of the cover plate with the upper resin interception member facing downward; The lower water distribution assembly comprises a lower fixed plate, a lower water distribution plate support, a lower porous water distribution plate and a lower resin interception member which are sequentially stacked, the lower fixed plate has a water passing hole corresponding to the lower pipeline interface; and the lower fixed plate, the lower water distribution plate support, the lower porous water distribution plate and the lower resin interception member are assembled into an integral whole and are fixed to the bottom in the box with the lower resin interception member facing upward.

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