Single-box combined type deep treatment device taking electric mixing bed as core

Abstract

The invention discloses a single-box combined type deep treatment device taking an electric mixing bed as a core, and belongs to the field of water treatment. The device is of an open single-box cover plate structure, an inner cavity of the device is divided into two chambers by a partition plate, and the two chambers are respectively provided with an electric mixing bed and a cation bed or anion bed unit; an upper supporting plate, a lower supporting plate, an upper water distribution plate and a lower water distribution plate are arranged in the box, and the two ends of the supporting plates abut against the water distribution plates and the partition plates to form a displacement-free overall stable structure. A main channel and an orthogonal branch channel are arranged in the partition plate, the branch channel is provided with a first through hole penetrating through the lower surface of the partition plate, a vertically-through second through hole which is not directly connected with the main channel and the branch channel is additionally formed, and a sealing ring is arranged between the partition plate and the inner wall of the box body to prevent mutual mixing of resin. The side wall of the box body is provided with a horizontal coaxial double-pipeline connector, the inner pipe is inserted into a main channel of the partition plate in a pluggable mode, and the pipes are sealed. According to the invention, a single-tank integrated design is realized, the problems of heavy weight, high cost, complicated installation and the like of the existing double-tank device are solved, and the device is suitable for advanced treatment of ammonia-rich condensed water, high-silicon reverse osmosis produced water or other water with similar water quality.

Description

A single-box combined deep processing device with an electric mixed bed as its core. Technical Field

[0001] This invention belongs to the field of water treatment technology, specifically relating to a single-box combined deep treatment device with an electro-mixed bed as its core, which is suitable for the deep treatment of ammonia-rich condensate, high-silica reverse osmosis permeate, or other water with similar quality in industries such as power and chemical. Background Technology

[0002] The applicant's previously disclosed two patent applications (application numbers: CN202511530066.6 and CN202511627371.7) both employ a stacked structure of two independent chambers: one consists of a cation exchange chamber and an electro-mixed bed chamber from top to bottom, suitable for the deep treatment of ammonia-rich condensate from industries such as power and chemicals; the other consists of an electro-mixed bed chamber and an anion exchange chamber from top to bottom, suitable for the deep treatment of reverse osmosis permeate with high silica content and other waters with similar qualities. Both patented technologies utilize flange structures between the chambers for external connection and fixation, and have been put into industrial application. Compared to traditional EDI or single electro-mixed beds, the patented technologies offer significant advantages such as high treatment efficiency, convenient operation, low power consumption, and high water recovery rate, indicating broad application prospects.

[0003] However, in the actual promotion and application process, the above-mentioned stacked double-box structure has gradually revealed some defects: First, the flange components used to connect the upper and lower boxes are large in size and heavy in weight, which directly increases the overall weight of the device, increases the manufacturing cost and increases the difficulty of equipment handling; Second, the flange connection requires a large number of bolts for fastening, and the process of tightening the bolts one by one during installation is cumbersome, consuming a lot of manpower and time, which seriously affects the assembly efficiency; Third, the flange connection is a weak point of the device, which is prone to becoming a leakage point during operation, affecting the safety and reliability of the device and increasing the workload of later maintenance. Summary of the Invention

[0004] In view of the problems existing in the background technology, the present invention aims to provide a single-box combined deep treatment device with an electro-mixed bed as the core, realizing a single-box integrated design, solving the problems of bulky, high cost and complicated installation of existing dual-box devices, and is suitable for the deep treatment of ammonia-rich condensate, high-silica reverse osmosis permeate or other water with similar quality.

[0005] A single-box combined deep processing device with an electric mixed bed as its core, the outer shell is a single-box structure with an open top and a cover plate. Internally, a partition plate divides the inner cavity of the box into an independent but fluidly interconnected upper chamber and a lower chamber. One chamber is equipped with an electric mixed bed unit, and the other with a positive or negative bed unit. An upper water distribution plate is located under the cover plate, and a lower water distribution plate is located on the upper side of the box bottom plate. An upper support plate is located between the upper water distribution plate and the partition plate, and a lower support plate is located between the lower water distribution plate and the partition plate. The ends of each support plate tightly abut against the corresponding water distribution plate and partition plate, mutually limiting each other to form a stable, non-displaceable overall structure. The partition has a built-in main channel, which is orthogonally connected to several evenly distributed branch channels. The branch channels have evenly distributed first through holes that penetrate the lower surface of the partition. The partition also has evenly distributed second through holes that penetrate the partition vertically. The second through holes are staggered from the main channel and branch channels and are not directly connected. A first sealing ring is provided between the partition and the inner wall of the box to prevent resin mixing. The side wall of the box has a horizontal and coaxial double pipe interface. The outer pipe is connected to the side wall of the box, and the inner pipe can be plugged into the main channel port of the partition and tightly connected to the main channel. The gap between the pipes is sealed with a corrosion-resistant second sealing ring or sealant.

[0006] Several alternative methods are provided below, but they are not intended as additional limitations on the overall solution above. They are merely further additions or optimizations. Provided there are no technical or logical contradictions, each alternative method can be combined individually with respect to the overall solution above, or multiple alternative methods can be combined with each other.

[0007] Optionally, the cover plate is a convex structure with an upwardly protruding area, in which a horizontally extending upper guide channel is formed, and a vertically extending upper pipe interface is provided at the center of the top of the upper guide channel; the bottom plate of the box is a concave structure with a concave area, in which a horizontally extending lower guide channel is formed, and one end of the lower guide channel is connected to a horizontally arranged lower pipe interface; the top surface of the upper water distribution plate is provided with evenly distributed upper water distribution channels orthogonal to the upper guide channel, and the bottom surface of the lower water distribution plate is provided with evenly distributed lower water distribution channels orthogonal to the lower guide channel; each upper water distribution channel and each lower water distribution channel is provided with vertically distributed water distribution holes that penetrate the corresponding water distribution channel; the lower side of the upper water distribution plate, the upper and lower sides of the partition plate, and the upper side of the lower water distribution plate are respectively tightly fixed with a slit plate for intercepting resin.

[0008] Optionally, the slotted plate is fixed by bolts or adhesive, and its side facing the bed unit is a slotted structure composed of strips with trapezoidal cross sections, while its back side is a hollowed-out mesh structure that serves as both a reinforcing rib and a uniform fluid distribution mechanism; the first and second through holes of the partition plate and the water distribution hole are all connected to the hollowed-out mesh of the corresponding slotted plate.

[0009] Optionally, the upper support plate and the lower support plate are attached to the inner side wall of the box by adhesive or adhesive and bolt fastening; the number of upper support plates and lower support plates is at least two, and when there are only two, they are installed opposite each other; the anode and cathode of the electric mixed bed unit are respectively installed on the opposite support plates in their respective chambers.

[0010] Optionally, a sealing gasket is sandwiched between the cover plate and the box body and a flange connection is adopted; the inner wall of the box body, the flange contact surface, each pipe interface and other water and electricity contact surfaces are all treated with anti-corrosion and insulation.

[0011] Optionally, the upper chamber is equipped with a cation exchange bed unit, and the lower chamber is equipped with an electro-mixed bed unit. The dual-pipe interface serves as the inlet for the regeneration acid solution during cation exchange bed regeneration. This device is suitable for the advanced treatment of condensate from industries such as power and chemical manufacturing.

[0012] Optionally, the upper chamber is equipped with an electro-mixed bed unit, and the lower chamber is equipped with an anion exchange bed unit. The dual-pipe interface serves as a discharge outlet for alkaline wastewater / washing wastewater during anion exchange bed regeneration. This device is suitable for the advanced treatment of reverse osmosis permeate with high silicon content or other water with similar quality.

[0013] Compared with the prior art, this application has at least one of the following beneficial effects: (1) It achieves lightweight device, reducing manufacturing costs and handling difficulties.

[0014] (2) Simplify assembly procedures and improve assembly efficiency.

[0015] (3) Enhance sealing performance, reduce leakage points, and improve safety and reliability. Attached Figure Description

[0016] Figure 1 is a front view of the electric mixed bed-yang bed single-box combination device; Figure 2 is a top view of the electric mixed bed-yang bed single-box combination device; Figure 3 is a left view of the electric mixed bed-yang bed single-box combination device; Figure 4 is a cross-sectional view of the electric mixed bed-yang bed single-box combination device II; Figure 5 is a front view of the electric mixed bed-yin bed single-box combination device; Figure 6 is a top view of the electric mixed bed-yin bed single-box combination device; Figure 7 is a left view of the electric mixed bed-yin bed single-box combination device; Figure 8 is a cross-sectional view of the electric mixed bed-yin bed single-box combination device II-II; Figure 9 is a cross-sectional view of the partition plate along the AA direction in Figure 8; Figure 10 is a cross-sectional view of the partition plate along the BB direction in Figure 8.

[0017] The reference numerals in the attached diagram are as follows: 1. Sealing gasket; 2. Bolt assembly; 3. Upper chamber; 4. Lower chamber; 5. Upper water distribution plate: 51. Upper water distribution trough, 52. Upper water distribution hole; 6. Lower water distribution plate: 61. Lower water distribution trough, 62. Lower water distribution hole; 7. Upper support plate; 8. Lower support plate; 9. Divider plate: 91. Main channel, 92. Branch channel, 93. First through hole, 94. Second through hole, 95. First sealing ring; 10. First narrow slot plate; 11. Second narrow slot plate; 12. Third narrow slot plate; 13. Fourth narrow slot plate; 14. Anode: 141. Anode terminal, 142. Anode fastening nut, 143. Anode gasket; 15. Cathode: 151. Cathode terminal block, 152. Cathode fastening nut, 153. Cathode gasket; 16. Cover plate: 161. First reinforcing rib, 162. Upper pipe interface, 163. Upper guide groove; 17. Dual pipe interface: 171. Outer pipe, 172. Inner pipe, 173. Second sealing ring; 18. Housing: 181. Side wall, 182. Bottom plate, 183. Second reinforcing rib, 184. Third reinforcing rib, 185. Lower pipe interface, 186. Lower guide groove, 187. Support feet, 188. Resin inlet / outlet interface (only for condensate treatment equipment); 19. Upper chamber resin layer; 20. Lower chamber resin layer. Detailed Implementation

[0018] 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.

[0019] To better describe and illustrate the embodiments of this application, reference may be made to one or more accompanying drawings, but the additional details or examples used to describe the drawings should not be considered as limiting the scope of any of the inventive creations of this application, the embodiments or preferred methods described herein.

[0020] 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.

[0021] As shown in Figures 1 to 10, a single-box combined deep treatment device with an electric mixed bed as the core includes a box 18, a partition plate 9, a water distribution component and a bed unit. The bed unit is a combination of an electric mixed bed unit and a positive bed unit or a combination of an electric mixed bed unit and a negative bed unit.

[0022] Referring to Figures 1 and 8, the outer shell of the device is a combination structure of a single box with an open top and a cover plate 16. Inside the box 18, a horizontally arranged partition plate 9 divides the inner cavity of the box into an independent upper chamber 3 and a lower chamber 4 that are fluidly connected. One of the two chambers is equipped with an electric mixed bed unit, and the other is equipped with a positive bed unit or a negative bed unit, forming an electric mixed bed-positive bed combination device or an electric mixed bed-negative bed combination device.

[0023] The cover plate 16 has a convex structure with an upward-protruding area in its middle. A horizontally extending upper guide channel 163 is formed within the protruding area. The two ends of the upper guide channel 163 are sealed. A vertically extending upper pipe interface 162 is provided at the center of the top of the upper guide channel 163. The bottom of the upper pipe interface 162 is connected to the upper guide channel 163. A first reinforcing rib 161 is provided on the top surface of the cover plate 16. The box body 18 has a side wall 181 and a bottom plate 182, which together form a cubic cavity. The bottom plate 182 has a concave structure with a recessed area. The recessed area is located in the middle of the bottom plate and forms a horizontally extending lower guide channel 186. One end of the lower guide channel 186 is sealed, and the other end is connected to a horizontally set and fixed lower pipe interface 185 on the side wall. A second reinforcing rib 184 is provided on the bottom surface of the bottom plate 182, and a third reinforcing rib 183 is provided on the outer side of the side wall 181. The entire enclosure is supported by 187 support legs at the bottom.

[0024] The partition plate 9 is a rectangular plate structure, and its cross-sectional views in different directions are shown in Figures 9 and 10. A horizontally extending main channel 91 and several evenly distributed branch channels 92 orthogonally connected to the main channel 91 are provided at the center of the partition plate 9. All branch channels extend horizontally, and both the main channel and all branch channels are fluid channels. Several vertically extending first through holes 93 are evenly distributed at the bottom of the branch channels 92, penetrating the lower surface of the partition plate 9 and connecting the branch channels 92 and the lower chamber 4 (see Figures 4 and 9). Several evenly distributed second through holes 94 are also provided on the partition plate 9, vertically penetrating the partition plate. The second through holes 94 are staggered from the main channel 91 and the branch channels 92, meaning that the second through holes 94 only connect the upper chamber 3 and the lower chamber 4, and are not directly connected to the main channel or the branch channels (see Figure 10). A horizontal and coaxial dual-pipe interface 17 is provided on the side wall 181 of the enclosure. The dual-pipe interface 17 includes an outer pipe 171, an inner pipe 172, and a second sealing ring 173. The outer pipe 171 is fixedly connected to the side wall of the enclosure, and the inner pipe 172 adopts a pluggable installation method and is inserted into the main channel 91 port of the partition plate 9 and is tightly connected to the main channel 91. The gap between the pipes is sealed with a corrosion-resistant second sealing ring 173 or sealant. A first sealing ring 95 is provided between the partition plate 9 and the inner wall of the enclosure to prevent the resin in the upper and lower chambers from mixing.

[0025] Water distribution components are installed in both the upper chamber 3 and the lower chamber 4. The water distribution components include an upper water distribution plate 5 and a lower water distribution plate 6. The upper water distribution plate 5 is located below the cover plate 16, and the lower water distribution plate 6 is placed on the upper side of the bottom plate of the tank. An upper support plate 7 is installed between the upper water distribution plate 5 and the partition plate 9, and a lower support plate 8 is installed between the lower water distribution plate 6 and the partition plate 9. The upper support plate 7 is close to the inner wall of the tank and its upper and lower ends abut against the upper water distribution plate 5 and the partition plate 9, respectively. The lower support plate 8 is close to the inner wall of the tank and its upper and lower ends abut against the partition plate 9 and the lower water distribution plate 6, respectively. After the cover plate and the top of the tank are fixed by the flange, the upper water distribution plate 5 is pressed to make the two ends of each support plate tightly abut against the corresponding water distribution plate and partition plate and mutually limit each other to form a stable overall structure without displacement. The upper support plate 7 and the lower support plate 8 are attached to the inner side wall of the box by adhesive or adhesive plus bolt fastening; there are at least two upper support plates 7 and two lower support plates 8, and they are installed opposite each other when there are only two; the anode and cathode of the electric mixed bed unit are respectively installed on the opposite support plates in their respective chambers.

[0026] The top surface of the upper water distribution plate 5 is provided with evenly distributed upper water distribution channels 51 that are orthogonally connected to the upper guide channel 163. The bottom of each upper water distribution channel is evenly provided with vertically penetrating upper water distribution holes 52 that connect the upper water distribution plate to the upper and lower spaces. The bottom surface of the lower water distribution plate 6 is provided with evenly distributed lower water distribution channels 61 that are orthogonally connected to the lower guide channel 186. The bottom of each lower water distribution channel is evenly provided with vertically penetrating lower water distribution holes 62 that connect the lower water distribution plate to the upper and lower spaces.

[0027] The lower side of the upper water distribution plate 5 is tightly fixed with the first slit plate 10, the upper side of the partition plate 9 is tightly fixed with the second slit plate 11, the lower side of the partition plate 9 is tightly fixed with the third slit plate 12, and the upper side of the lower water distribution plate 6 is tightly fixed with the fourth slit plate 13. Each slit plate is fixed by bolts or adhesive. All slit plates are used to intercept resin in the corresponding chamber. All slit plates have a slit structure composed of strips with trapezoidal cross-sections on the side facing the bed unit, and a hollow mesh structure on the back side that serves as both reinforcing ribs and liquid flow distribution. The upper and lower water distribution holes and the first and second through holes of the partition plate are all connected to the hollow mesh of the corresponding slit plate. Specifically, the perforated mesh on the back side of the first slit plate 10 is connected to the upper water distribution hole 52, and the slit structure side faces the bed unit in the upper cavity; the perforated mesh on the back side of the second slit plate 11 is connected to the second through hole 94 of the partition plate, and the slit structure side faces the bed unit in the upper cavity; the perforated mesh on the back side of the third slit plate 12 is connected to the first through hole 93 of the partition plate, and the slit structure side faces the bed unit in the lower cavity; the perforated mesh on the back side of the fourth slit plate 13 is connected to the lower water distribution hole 62, and the slit structure side faces the bed unit in the lower cavity.

[0028] The cover plate and the box body are fixedly connected by flange and bolt group 2, with a sealing gasket 1 sandwiched between them. The inner wall of the box body, the flange contact surface, each pipe interface and other water and electricity contact surfaces are all treated with anti-corrosion and insulation.

[0029] The anode bed unit is a layer of anode bed resin filled with a weakly acidic resin, and the chamber containing the anode bed unit is also filled with a layer of anode bed resin filled with a weakly acidic resin. In some embodiments, the anode bed is a shallow high-speed anode bed, and the height of the anode bed resin layer is 20-50 cm.

[0030] The anion exchange bed unit is an anion exchange resin layer filled with a strongly basic anion exchange resin. The chamber containing the anion exchange bed unit is also filled with this strongly basic anion exchange resin layer. In some embodiments, the filling height of the anion exchange resin layer is 30-50 cm.

[0031] The electric mixed bed includes an electrode assembly and an electric mixed bed resin layer formed by filling anion and cathode mixed resin. The chamber of the electric mixed bed unit is filled with anion and cathode mixed resin to form the electric mixed bed resin layer (see Figures 4 and 8). The electrode assembly includes an anode 14 and a cathode 15, which are disposed in close contact with the support plate of the corresponding chamber. Each of the two opposite side walls of the corresponding chamber has an anode terminal through-hole and a cathode terminal through-hole, respectively for penetrating the corresponding terminal. The anode terminal 141 and cathode terminal 142 are respectively assembled through the corresponding through-holes; the anode and cathode are electrically connected to their corresponding terminals. Specifically, an anode terminal through-hole is provided on the side wall corresponding to the anode. The anode terminal 141 penetrates the anode terminal through-hole and is electrically connected to the anode 14 by direct electric welding. The anode terminal 141 and the anode terminal through-hole are sealed with insulating sealant. The anode terminal 141 is fastened to the outside of the side wall of the corresponding chamber by an anode fastening nut 142 and an anode gasket 143. An anode terminal through-hole is provided on the side wall corresponding to the cathode 15. The cathode terminal 151 penetrates the cathode terminal through-hole and is electrically connected to the cathode by direct electric welding. The cathode terminal 151 and the cathode terminal through-hole are sealed with insulating sealant. The cathode terminal 151 is fastened to the outside of the side wall of the corresponding chamber by a cathode fastening nut 152 and a cathode gasket 153. In some embodiments, the filling height of the electric mixed bed resin layer ranges from 50 to 80 cm.

[0032] In one embodiment, an cation exchange bed unit is configured in the upper chamber 3, and an electro-mixed bed unit is configured in the lower chamber 4 (see Figures 1-4). In this embodiment, the resin layer 19 in the upper chamber is the cation exchange bed resin layer, and the resin layer 20 in the lower chamber is the electro-mixed bed resin layer. The dual-pipe interface 17 is used as the inlet for the regenerated acid solution during cation exchange bed regeneration. This combined device is suitable for the deep treatment of condensate from industries such as power and chemicals. Since condensate often contains trace amounts of iron, and condensate from the chemical industry often contains impurities such as oil, which easily contaminate the cation exchange bed resin, a resin inlet / outlet interface 188 is also provided on the side wall of the upper chamber in this embodiment to enable rapid replacement of the cation exchange bed resin. During replacement, the diaphragm pump suction pipe can be extended to the bottom of the cation exchange bed through the resin inlet / outlet interface 188 to extract the contaminated resin; then, new resin is sent into the cation exchange bed through the same interface using the diaphragm pump discharge pipe.

[0033] In another embodiment, an electro-mixed bed unit is configured in the upper chamber 3, and an anion exchange bed unit is configured in the lower chamber 4 (see Figures 5-8). In this embodiment, the resin layer 19 in the upper chamber is an electro-mixed bed resin layer, and the resin layer 20 in the lower chamber is an anion exchange bed resin layer. The dual-pipe interface 17 serves as a discharge outlet for alkaline wastewater or cleaning wastewater during anion exchange bed regeneration. This combined device is suitable for the advanced treatment of reverse osmosis permeate with high silicon content or other water with similar quality.

[0034] Example 1: An electro-mixed bed-cationic bed single-box combination device is shown in Figures 1-4. In this combination device, the upper chamber 3 contains a cationic bed unit, and the lower chamber 4 contains an electro-mixed bed unit. The dual-pipe interface 17 serves as the inlet for the regeneration acid solution during cation bed regeneration. The regeneration acid solution is fed into the main channel of the partition plate through the dual-pipe interface, and then into the electro-mixed bed unit in the lower chamber through various branch channels and the first through hole. This device is suitable for the deep treatment of condensate in industries such as power and chemical engineering. The treatment process is as follows: Treatment: Condensate is fed into the cationic bed unit through the upper pipe interface. The weakly acidic resin in the cationic bed unit pre-treats the condensate to remove ammonia and balance the anions and cations. The pre-treated condensate enters the electro-mixed bed unit through the second through hole of the partition plate, undergoes deep purification treatment by the electro-mixed bed resin layer, and is discharged through the lower pipe interface.

[0035] Regeneration: When the effluent quality drops to a preset threshold, the purified water after deep treatment is sent into the electro-mixed bed unit through the lower pipe interface. At the same time, DC current is applied to the anode and cathode to promote the regeneration of the electro-mixed bed resin layer and generate electro-mixed bed regeneration concentrate. The electro-mixed bed regeneration concentrate mixes with the acid solution sent through the dual pipe interface, main channel, branch channel and first through hole to form acidic regeneration solution. The acidic regeneration solution enters the cation bed unit through the second through hole, flows through the cation bed resin layer, chemically regenerates the cation bed resin layer and generates cation bed regeneration concentrate, which is discharged through the upper pipe interface.

[0036] Cleaning: After regeneration, the deeply treated purified water is sent into the electro-mixed bed unit through the lower pipe interface. The purified water flows sequentially through the electro-mixed bed resin layer and the cation bed resin layer before being discharged through the upper pipe interface, rinsing away residual impurities until the quality of the effluent meets the preset requirements. That is, during synchronous series cleaning, the water flow direction is the same as during synchronous series regeneration.

[0037] The processes of treatment, regeneration, and cleaning are repeated continuously.

[0038] Example 2: An electro-mixed bed / anion bed single-chamber combination device is shown in Figures 5-8. In this combination device, the upper chamber 3 contains an electro-mixed bed unit, and the lower chamber 4 contains an anion bed unit. The dual-pipe interface 17 serves as the discharge outlet for alkaline wastewater or cleaning wastewater during anion bed regeneration. This device is suitable for the advanced treatment of reverse osmosis permeate with high silicon content or other water with similar quality.

[0039] The process is as follows: During treatment, reverse osmosis permeate is fed in through the upper pipe interface and flows from top to bottom through the electro-mixed bed unit and the anion exchange bed unit. The electro-mixed bed is used to remove impurities such as salts, carbon dioxide and some silicon compounds that remain after reverse osmosis treatment, while the anion exchange bed is used to remove silicon compounds that remain after electro-mixed bed treatment, ensuring that the conductivity and silica of the final permeate can meet the standards stably.

[0040] The electro-mixed bed unit is periodically electro-regenerated according to a preset cycle; the anion bed unit is a silicon content-triggered chemical regeneration unit. That is, at the end of the treatment cycle of the electro-mixed bed unit, if the silicon content of the effluent from the anion bed unit reaches a preset threshold, both the anion bed unit and the electro-mixed bed unit will be regenerated; otherwise, only the electro-mixed bed unit will be regenerated.

[0041] When only the electro-mixed bed unit is regenerated, the operation is as follows: (1) Purified water is sent into the lower pipe interface at the bottom of the anion bed unit, flows through the second through hole of the anion bed unit and the partition plate, and then flows into the electro-mixed bed unit; turn on the DC power supply to drive the electro-regeneration of the electro-mixed bed resin layer, and the regenerated concentrate is discharged from the upper pipe interface at the top and sent to the pre-reverse osmosis for recycling.

[0042] (2) After regeneration, turn off the DC power supply and keep the water flow constant to clean the electro-mixed bed resin layer.

[0043] When both the anion bed unit and the electric mixed bed unit are regenerated, the operation is as follows: (1) Chemical regeneration of the anion bed unit: Purified water is fed upward from the lower pipe interface at the bottom of the anion bed unit, and sodium hydroxide solution is added to the purified water to form a 0.1%-1.0% dilute alkali solution, which is regenerated at a flow rate of 5-10 m / h; at the same time, a small flow of reverse osmosis permeate is introduced into the top of the electric mixed bed unit to prevent waste alkali solution from entering the electric mixed bed resin layer. The mixed solution is discharged through the first through hole, branch channel, main channel and double pipe interface of the partition plate to adjust the pH value of the pre-reverse osmosis feed water.

[0044] (2) Anion bed unit cleaning: Stop adding chemicals, keep the water flow constant, clean the anion bed unit, and discharge the effluent along the above path. This is also used to adjust the pH value of the pre-reverse osmosis feed water. (3) Continue cleaning the anion bed unit while regenerating the electro-mixed bed unit: Continue cleaning the anion bed unit with purified water (at this time, the dual pipe interface is closed). The cleaning effluent from the anion bed unit flows into the electro-mixed bed unit from bottom to top. At the same time, turn on the DC power supply to drive the electro-mixed bed resin layer regeneration. The electro-regeneration concentrate is discharged from the top pipe interface of the electro-mixed bed and sent to the pre-reverse osmosis unit for recycling.

[0045] (4) Synchronous cleaning: Turn off the power, keep the water flow the same as in step (3), and clean the anion bed and the electro-mixed bed resin layer simultaneously. The cleaning effluent is also sent to the pre-reverse osmosis system for recycling.

[0046] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A single-box combined deep processing device with an electric mixed bed as its core, characterized in that, The outer shell is a single-box structure with an open top and a cover. Internally, a partition divides the inner cavity into an independent, fluidly interconnected upper chamber and a lower chamber. One chamber houses an electric mixing bed unit, and the other a positive or negative bed unit. An upper water distribution plate is located under the cover, and a lower water distribution plate is located on the upper part of the bottom plate. An upper support plate is located between the upper water distribution plate and the partition, and a lower support plate is located between the lower water distribution plate and the partition. Each support plate has its ends tightly abutting against the corresponding water distribution plate and partition, mutually limiting each other to form a stable, non-displaceable structure. A main channel is built into the partition. The main channel is orthogonally connected to several evenly distributed branch channels. Each branch channel has a first through hole that is evenly distributed and penetrates the lower surface of the partition plate. The partition plate also has a second through hole that is evenly distributed and penetrates the partition plate vertically. The second through holes are staggered from the main channel and the branch channels and are not directly connected. A first sealing ring is provided between the partition plate and the inner wall of the box to prevent resin mixing. The side wall of the box is provided with a horizontal and coaxial double pipe interface. The outer pipe is connected to the side wall of the box, and the inner pipe can be plugged into the main channel port of the partition plate and tightly connected to the main channel. The gap between the pipes is sealed with a corrosion-resistant second sealing ring or sealant.

2. The single-box combined deep processing device with an electro-mixed bed as its core according to claim 1, characterized in that, The cover plate has a convex structure with an upwardly raised area, within which a horizontally extending upper guide channel is formed. A vertically extending upper pipe interface is provided at the center of the top of the upper guide channel. The bottom plate of the box has a concave structure with a recessed area, within which a horizontally extending lower guide channel is formed. One end of the lower guide channel is connected to a horizontally positioned lower pipe interface. The top surface of the upper water distribution plate has evenly distributed upper water distribution channels orthogonal to the upper guide channel, and the bottom surface of the lower water distribution plate has evenly distributed lower water distribution channels orthogonal to the lower guide channel. Each upper and lower water distribution channel has vertically distributed water distribution holes that penetrate the corresponding water distribution channel. The lower side of the upper water distribution plate, the upper and lower sides of the partition plate, and the upper side of the lower water distribution plate are respectively tightly fixed with slit plates to intercept resin.

3. The single-box combined deep processing device with an electro-mixed bed as its core according to claim 2, characterized in that, The slotted plate is fixed by bolts or adhesive. The side facing the bed unit is a slotted structure composed of strips with trapezoidal cross sections, and the back side is a hollowed-out mesh structure that serves as both a reinforcing rib and a uniform liquid flow distribution. The first and second through holes of the partition plate and the water distribution hole are all connected to the hollowed-out mesh of the corresponding slotted plate.

4. The single-box combined deep processing device with an electro-mixed bed as its core according to claim 1, characterized in that, The upper and lower support plates are attached to the inner side wall of the box by adhesive or adhesive plus bolt fastening; there are at least two upper and two lower support plates, and they are installed opposite each other when there are only two; the anode and cathode of the electric mixed bed unit are respectively installed on the opposite support plates in their respective chambers.

5. The single-box combined deep processing device with an electro-mixed bed as its core according to claim 1, characterized in that, The cover plate is sandwiched between a sealing gasket and the box body and is connected by a flange; the inner wall of the box body, the flange contact surface, each pipe interface and other water and electricity contact surfaces are all treated with anti-corrosion and insulation.

6. The single-box combined deep processing device with an electro-mixed bed as its core according to claim 1, characterized in that, The upper chamber is equipped with a cation bed unit, the lower chamber is equipped with an electro-mixed bed unit, and the dual-pipe interface is used as an inlet for the regeneration acid solution during cation bed regeneration.

7. The single-box combined deep processing device with an electro-mixed bed as its core according to claim 1, characterized in that, The upper chamber is equipped with an electric mixed bed unit, the lower chamber is equipped with an anion bed unit, and the dual-pipe interface is used as a discharge outlet for alkaline waste liquid or cleaning wastewater during anion bed regeneration.

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