EDI (electrodeionization) desalting device

Abstract

The invention relates to the technical field of EDI (electrodeionization) desalting, and discloses an EDI desalting device which comprises a tank body, and further comprises supporting legs used for filtering water, driving a transmission shaft to rotate through a motor, driving a row-shaped net cage to revolve around the transmission shaft, and pushing a first sliding block to move up and down by a spherical top block under the action of a spiral sliding rail, reciprocating lifting of the row-shaped net cage is achieved through cooperation of buoyancy of the floating plate, the filtering effect of all-directional and dynamic contact of activated carbon and water is achieved, the limitation that only surface contact is conducted on traditional fixed bed activated carbon is thoroughly broken through, and the problem that water flow forms a short-circuit channel in a filtering layer and consequently adsorption is insufficient is solved. And the double movement of the row-shaped net cage enables active carbon particles in the row-shaped net cage to always keep high-efficiency contact with water flow, so that dead angles of active carbon which does not participate in adsorption are greatly reduced, the removal efficiency of impurities such as organic matters and residual chlorine in water is further improved, the quality of water entering a subsequent EDI module is ensured to stably reach the standard, and a high-quality preposed guarantee is provided for deep desalination.

Description

Technical Field

[0001] This invention relates to the field of EDI desalination technology, specifically to an EDI desalination device. Background Technology

[0002] EDI (electrodeionization) desalination units, as core equipment in advanced water treatment, are widely used in industries with stringent water quality requirements, such as electronics, pharmaceuticals, and power generation, due to their advantages of requiring no chemical regenerators and continuously producing high-purity water. Their desalination efficiency is closely related to the quality of the influent pretreatment, especially the removal efficiency of organic matter in the water, which directly affects the adsorption performance and lifespan of the ion exchange resin within the EDI module. Organic matter easily adsorbs and deposits on the resin surface, leading to resin contamination, decreased exchange capacity, and consequently, reduced desalination efficiency of the EDI module, increased energy consumption, and even the need for shutdown and resin replacement, severely impacting production continuity.

[0003] According to Chinese Patent Publication No. CN221894852U, an EDI desalination device belongs to the field of water treatment technology. It includes a base frame, a water pump, a security filter, a water storage tank, a frame, an EDI device, a sterilizer, and an inlet valve. The security filter is divided into an upper cylinder and a lower cylinder. The lower cylinder contains a support ring, a support mesh, and a packing filter plate. A funnel-shaped distributor is located above the packing filter plate, and a conical distribution plate is fixed to the bottom of the distributor. Backwash holes are evenly distributed on the distribution plate, and a backwash pipe is connected to the top of the distributor. This invention can desalinate water using the EDI device. The packing filter plate installed in the security filter at the inlet of the EDI device filters impurities, preventing them from affecting desalination. The packing filter plate can be backwashed by backwash water sprayed from the backwash holes on the distribution plate within the distributor, making it easier to clean. Additionally, a sterilizer is installed on the inlet pipe to sterilize the water, better preventing bacterial growth in subsequent equipment.

[0004] While this device facilitates filter plate cleaning, the activated carbon filter for water filtration employs a fixed-bed structure, with activated carbon particles statically packed within the filter layer. When water flows vertically through the fixed bed from top to bottom, it can only make limited contact with the surface of the activated carbon particles, and water flow channels easily form inside the filter layer. This results in some activated carbon particles not fully participating in adsorption, limiting the efficiency of organic matter removal. Furthermore, the saturated activated carbon layer is prone to caking, causing downtime losses. Therefore, an EDI desalination device is proposed to address these problems. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an EDI desalination device to address the shortcomings of the prior art.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: an EDI desalination device, including a tank, and further comprising: Support legs, located on the outside of the tank, are used to provide support for the tank. The inlet pipe is located at the top of the tank and is used to introduce the water that needs to be filtered into the tank. A drain pipe, located at the bottom of the tank, is used to drain the filtered water out of the tank. The purification mechanism, located inside the tank, is used to filter the water; The purification mechanism includes a drive shaft, a first slide groove, a first slider, a horizontal shaft, a row of mesh boxes, a floating plate, a spherical top block, a spiral slide rail, a motor, and a connecting rod; The top end of the drive shaft rotates through a bearing to the outside of the tank. The motor is connected to the top of the tank, and the bottom output end of the motor is connected to the top end of the drive shaft. The first slide groove is opened through the middle of the drive shaft. The first slider is slidably connected inside the first slide groove. The first slide groove limits the movement of the first slider, so that the first slider can only move up and down within the first slide groove. The end of the horizontal shaft near the drive shaft is rotatably connected to the first slider, and the other end of the horizontal shaft away from the drive shaft passes through the row-shaped mesh box. Activated carbon is placed inside the row-shaped mesh box.

[0007] Preferably, the bottom of the first slider is connected to a float plate, the float plate is arranged in a ring, the float plate is sleeved on the outside of the drive shaft, the top end of the connecting rod is connected to the top inner wall of the tank, the bottom end of the connecting rod is connected to a spiral slide rail, the spiral slide rail is sleeved on the outside of the drive shaft, the bottom of the spiral slide rail is in contact with a spherical top block, and the spherical top block is connected to the top of the first slider.

[0008] Preferably, the tank body is provided with a flipping mechanism, the flipping mechanism includes a second slide groove, the second slide groove is opened inside the tank body, the second slide groove is slidably connected to a second slider, the second slide groove is set to limit the up and down movement of the second slider, and a ring is connected to the second slider, the ring is sleeved on the outside of the row-shaped mesh box.

[0009] Preferably, the upper and lower sides of the ring are connected to several sets of racks, and the other end of the horizontal shaft away from the transmission shaft is connected to a gear, which meshes with the racks.

[0010] Preferably, the inner wall of the ring is provided with an annular slide rail, the front and rear sides of the first slider are connected with crossbars, and a third slider is slidably connected inside the annular slide rail, the third slider being connected to the crossbars.

[0011] Preferably, the tank body is provided with a vibration mechanism, which includes a fourth sliding groove. The fourth sliding groove is formed on the inner wall of the tank body. A fourth slider is slidably connected inside the fourth sliding groove. A cylindrical mesh box is connected to one side of the fourth slider. There are two cylindrical mesh boxes, which are respectively arranged on the upper and lower sides of the row-shaped mesh box. An activated carbon layer is provided inside the cylindrical mesh box. The cylindrical mesh box is sleeved on the outside of the drive shaft. The connecting rod slides through the top of the cylindrical mesh box through a linear bearing.

[0012] Preferably, a spring is provided inside the fourth slide groove. One end of the spring is connected to the inner wall of the fourth slide groove, and the other end of the spring away from the inner wall of the fourth slide groove is connected to the fourth slider. The spring drives the fourth slider to rebound.

[0013] Preferably, a vertical bar is connected to the horizontal bar, and a brush plate is connected to the other end of the vertical bar away from the horizontal bar, and the brush plate is in contact with the cylindrical mesh box.

[0014] The present invention, by adopting the above technical solution, can bring the following beneficial effects: 1. This invention utilizes a purification mechanism driven by a motor to rotate a transmission shaft, causing a row of mesh boxes to revolve around the shaft. Simultaneously, a spherical top block, propelled by a spiral slide rail, pushes a first slider up and down. Combined with the buoyancy of a float plate, this achieves the reciprocating lifting and lowering of the mesh boxes, resulting in a comprehensive and dynamic filtration effect between activated carbon and water. This completely breaks the limitation of traditional fixed-bed activated carbon, which only has surface contact. It avoids the problem of insufficient adsorption caused by short-circuit channels formed by water flow within the filter layer. Furthermore, the dual movement of the mesh boxes ensures that the internal activated carbon particles maintain efficient contact with the water flow, significantly reducing dead zones of activated carbon that do not participate in adsorption. This further improves the removal efficiency of impurities such as organic matter and residual chlorine in the water, ensuring that the water quality entering the subsequent EDI module consistently meets standards, providing a high-quality pre-treatment guarantee for deep desalination.

[0015] 2. This invention, by setting up a flipping mechanism, simultaneously drives the horizontal axis to revolve through the purification mechanism. The gear at the end of the horizontal axis meshes with the rack on the ring, driving the array of mesh boxes to rotate and flip around the horizontal axis. This achieves dynamic flipping and uniform distribution of the activated carbon layer, effectively preventing localized adsorption saturation and caking of the activated carbon due to prolonged stillness. It ensures that each activated carbon particle can fully utilize its adsorption performance. Furthermore, the rotational action, along with the revolution and lifting / lowering movements of the array of mesh boxes, coordinates to create richer contact angles and longer contact times between the activated carbon and the water, further improving the adsorption utilization rate of the activated carbon, extending the activated carbon replacement cycle, reducing equipment maintenance costs and downtime losses, and ensuring continuous and stable operation of the filtration system.

[0016] 3. This invention utilizes a vibration mechanism where a horizontal bar moves up and down and rotates with the first slider, causing the vertical bar and brush plate to move synchronously. During contact with the cylindrical mesh box, the brush plate, in conjunction with the rebound action of the spring in the fourth groove, pushes the cylindrical mesh box to vibrate up and down. Simultaneously, the brush plate rotates to clean impurities adhering to the surface of the mesh box, achieving the dual effects of enhanced filtration with a double-layer activated carbon layer and self-cleaning of the mesh box. The upper and lower sets of cylindrical mesh boxes, together with the middle row of mesh boxes, form a three-dimensional filtration system, expanding the contact range between the activated carbon and the water. The vibration action prevents the activated carbon layer inside the cylindrical mesh box from hardening, and the cleaning action ensures that the mesh box pores remain unobstructed, further improving the overall filtration system's water flow and the thoroughness of organic matter removal. This provides a low-organic-matter, low-impurity influent environment for the subsequent EDI module, effectively protecting the ion exchange resin within the EDI module and extending its service life and desalination efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the tank area in this invention; Figure 3 This is an exploded view of the internal structure of the tank area in this invention; Figure 4 This is a schematic diagram of the structure of the row-shaped wire mesh cage area in this invention; Figure 5 This is an exploded view of the annular region in this invention; Figure 6 In this invention Figure 5 Enlarged view of point A; Figure 7 This is a schematic diagram of the cylindrical wire mesh cage area structure in this invention; Figure 8 In this invention Figure 7 Enlarged view of point B.

[0018] In the diagram: 1. Tank body; 2. Support leg; 3. Inlet pipe; 4. Drain pipe; 5. Purification mechanism; 6. Tilting mechanism; 7. Vibration mechanism; 501. Drive shaft; 502. First chute; 503. First slider; 504. Horizontal shaft; 505. Row-shaped mesh box; 506. Float plate; 507. Spherical top block; 508. Spiral slide rail; 509. Motor; 5010. Connecting rod; 601. Second chute; 602. Second slider; 603. Ring; 604. Rack; 605. Gear; 606. Annular slide rail; 607. Crossbar; 608. Third slider; 701. Fourth chute; 702. Fourth slider; 703. Cylindrical mesh box; 704. Spring; 705. Vertical rod; 706. Brush plate. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figure 1-8 One embodiment of the present invention is: an EDI desalination device, comprising a tank 1, and further comprising: Support leg 2 is located on the outside of tank body 1 and is used to provide support for tank body 1; The water inlet pipe 3 is located at the top of the tank 1 and is used to introduce the water that needs to be filtered into the tank 1. Drain pipe 4 is located at the bottom of tank 1 and is used to drain the filtered water out of tank 1; Purification unit 5 is located inside tank 1 and is used to filter water; The purification mechanism 5 includes a drive shaft 501, a first slide groove 502, a first slider 503, a horizontal shaft 504, a row of mesh boxes 505, a floating plate 506, a spherical top block 507, a spiral slide rail 508, a motor 509, and a connecting rod 5010. The top end of the drive shaft 501 rotates through a bearing to the outside of the tank 1. The motor 509 is connected to the top of the tank 1, and the bottom output end of the motor 509 is connected to the top end of the drive shaft 501. The first slide groove 502 is opened through the middle of the drive shaft 501. The first slider 503 is slidably connected inside the first slide groove 502. The first slider 503 is limited by the first slide groove 502, so that the first slider 503 can only move up and down within the first slide groove 502. The end of the horizontal shaft 504 near the drive shaft 501 is rotatably connected to the first slider 503, and the other end of the horizontal shaft 504 away from the drive shaft 501 passes through the row-shaped mesh box 505. Activated carbon is placed inside the row-shaped mesh box 505.

[0021] The bottom of the first slider 503 is connected to a float plate 506, which is arranged in a ring shape and is sleeved on the outside of the drive shaft 501. The top end of the connecting rod 5010 is connected to the top inner wall of the tank 1, and the bottom end of the connecting rod 5010 is connected to the spiral slide rail 508, which is sleeved on the outside of the drive shaft 501. The bottom of the spiral slide rail 508 is in contact with the spherical top block 507, which is connected to the top of the first slider 503.

[0022] Working Principle: First, the water to be filtered is introduced into the tank 1 through the inlet pipe 3. Then, the motor 509 is turned on, driving the drive shaft 501 to rotate. The rotation of the drive shaft 501 drives the first slider 503 to rotate, which in turn drives the horizontal shaft 504 to rotate around the drive shaft 501. The rotation of the drive shaft 501 drives the mesh box 505 to rotate around the drive shaft 501, and the activated carbon in the mesh box 505 thoroughly filters the organic matter in the water. Simultaneously, the rotation of the drive shaft 501 drives the spherical top block 507 to rotate. During the rotation of the spherical top block 507, it is pushed downwards by the spiral slide rail 508, causing the first slider 503 to move downwards. Then, under the buoyancy of the float plate 506, the first slider 503 moves upwards. This process repeats, causing the first slider 503 to drive the horizontal shaft 504 and the mesh box 505 to move up and down, further enhancing the filtration effect of the activated carbon in the mesh box 505 on the organic matter in the water.

[0023] Please see Figure 1-8 Based on the above embodiments, in another embodiment of the present invention, a flipping mechanism 6 is provided inside the tank body 1. The flipping mechanism 6 includes a second slide groove 601, which is opened inside the tank body 1. A second slider 602 is slidably connected inside the second slide groove 601. The second slide groove 601 limits the up and down movement of the second slider 602. A ring 603 is connected to the second slider 602, and the ring 603 is sleeved on the outside of the row-shaped mesh box 505.

[0024] Several sets of racks 604 are connected to the upper and lower sides of the ring 603. A gear 605 is connected to the other end of the horizontal shaft 504 away from the transmission shaft 501. The gear 605 meshes with the racks 604.

[0025] The inner wall of the ring 603 is provided with an annular slide rail 606. The front and rear sides of the first slider 503 are connected with crossbars 607. The inside of the annular slide rail 606 is slidably connected to a third slider 608, which is connected to the crossbars 607.

[0026] Working principle: The horizontal shaft 504 and the mesh box 505 rotate around the drive shaft 501, driving the gear 605 to rotate. The gear 605, while rotating, contacts several sets of racks 604 and rotates on its own axis, causing the horizontal shaft 504 and the mesh box 505 to rotate as well. This further enhances the filtration effect of the activated carbon in the mesh box 505. The first slider 503 rotates and moves up and down, simultaneously driving the horizontal bar 607 and the third slider 608 to rotate and move up and down. The third slider 608, while rotating, slides within the annular slide rail 606. The up-and-down movement of the third slider 608 drives the annular ring 603 to move up and down, maintaining a perpendicular relative movement with the mesh box 505 and the gear 605.

[0027] Please see Figure 1-8 Based on the above embodiments, in another embodiment of the present invention, a vibration mechanism 7 is provided inside the tank body 1. The vibration mechanism 7 includes a fourth slide groove 701, which is formed on the inner wall of the tank body 1. A fourth slider 702 is slidably connected inside the fourth slide groove 701. A cylindrical mesh box 703 is connected to one side of the fourth slider 702. There are two cylindrical mesh boxes 703, which are respectively arranged on the upper and lower sides of the row mesh box 505. An activated carbon layer is provided inside the cylindrical mesh box 703. The cylindrical mesh box 703 is sleeved on the outside of the drive shaft 501. The connecting rod 5010 slides through the top cylindrical mesh box 703 through a linear bearing.

[0028] A spring 704 is installed inside the fourth slide groove 701. One end of the spring 704 is connected to the inner wall of the fourth slide groove 701, and the other end of the spring 704 away from the inner wall of the fourth slide groove 701 is connected to the fourth slider 702. The spring 704 is used to drive the fourth slider 702 to rebound.

[0029] A vertical bar 705 is connected to the horizontal bar 607. A brush plate 706 is connected to the other end of the vertical bar 705 away from the horizontal bar 607. The brush plate 706 is in contact with the cylindrical mesh box 703.

[0030] Working principle: As the horizontal bar 607 moves up and down, it drives the vertical bar 705 and the brush plate 706 to move up and down as well. In conjunction with the spring 704, the vertical bar 703 moves up and down. The vertical movement of the cylindrical mesh box 703 causes the activated carbon layer inside to shake, thereby increasing the contact area between the activated carbon layer and the water. As the horizontal bar 607 rotates, it drives the vertical bar 705 and the brush plate 706 to rotate. The rotation of the brush plate 706 cleans the impurities attached to the surface of the cylindrical mesh box 703, thereby maintaining the efficiency of water passage through the cylindrical mesh box 703.

[0031] This invention provides an EDI desalination device. Many methods and approaches exist for implementing this technical solution; the above description is merely a preferred embodiment. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this invention, and these improvements and modifications should also be considered within the scope of protection of this invention. All components not explicitly stated in this embodiment can be implemented using existing technology.

Claims

1. An EDI desalination device comprising a tank body (1), characterized in that, Also include: Supporting leg (2) is arranged in the outside of the tank body (1), for providing support force to the tank body (1); Water inlet pipe (3) is arranged at the top of the tank body (1), for guiding the water needing to be filtered into the inside of the tank body (1); Drain pipe (4) is arranged at the bottom of the tank body (1), for guiding the filtered water out of the tank body (1); Purification mechanism (5) is arranged in the inside of the tank body (1), for filtering water; The purification mechanism (5) includes a transmission shaft (501), a first sliding groove (502), a first sliding block (503), a horizontal shaft (504), a row of net boxes (505), a floating plate (506), a spherical top block (507), a spiral slide rail (508), a motor (509), a connecting rod (5010); The top end of the transmission shaft (501) is rotatably penetrated to the outside of the tank body (1), the motor (509) is connected at the top of the tank body (1), the bottom output end of the motor (509) is connected with the top end of the transmission shaft (501), the first sliding groove (502) is penetratedly arranged in the middle of the transmission shaft (501), the first sliding block (503) is slidingly connected in the inside of the first sliding groove (502), the horizontal shaft (504) is rotatably connected with the first sliding block (503) at one end close to the transmission shaft (501), the other end of the horizontal shaft (504) away from the transmission shaft (501) penetrates the row of net boxes (505), and the inside of the row of net boxes (505) is provided with activated carbon.

2. An EDI desalination device according to claim 1, characterized in that: The bottom of the first sliding block (503) is connected with the floating plate (506), the floating plate (506) is annularly arranged, the floating plate (506) is sleeved on the outside of the transmission shaft (501), the top end of the connecting rod (5010) is connected with the top inner wall of the tank body (1), the bottom end of the connecting rod (5010) is connected with the spiral slide rail (508), the spiral slide rail (508) is sleeved on the outside of the transmission shaft (501), the bottom of the spiral slide rail (508) is in contact with the spherical top block (507), and the spherical top block (507) is connected at the top of the first sliding block (503).

3. An EDI desalination device according to claim 2, wherein: The inside of the tank body (1) is provided with a turnover mechanism (6), the turnover mechanism (6) includes a second sliding groove (601), the second sliding groove (601) is arranged in the inside of the tank body (1), the inside of the second sliding groove (601) is slidingly connected with a second sliding block (602), the second sliding block (602) is connected with a circular ring (603), and the circular ring (603) is sleeved on the outside of the row of net boxes (505).

4. An EDI desalination device according to claim 3, wherein: The upper and lower sides of the circular ring (603) are connected with a plurality of groups of racks (604), the other end of the horizontal shaft (504) away from the transmission shaft (501) is connected with a gear (605), and the gear (605) is engaged with the rack (604).

5. An EDI desalination device according to claim 4, wherein: The inner wall of the circular ring (603) is provided with an annular slide rail (606), the front and rear sides of the first sliding block (503) are connected with a horizontal rod (607), the inside of the annular slide rail (606) is slidingly connected with a third sliding block (608), and the third sliding block (608) is connected with the horizontal rod (607).

6. An EDI desalination device according to claim 5, wherein: The inside of the tank body (1) is provided with a vibrating mechanism (7), the vibrating mechanism (7) comprises a fourth sliding groove (701), the fourth sliding groove (701) is opened in the inner wall of the tank body (1), the inside of the fourth sliding groove (701) is slidably connected with a fourth sliding block (702), one side of the fourth sliding block (702) is connected with a cylindrical net cage (703), the number of the cylindrical net cage (703) is two, the two cylindrical net cages (703) are respectively arranged on the upper and lower sides of the row-shaped net cage (505), the inside of the cylindrical net cage (703) is provided with an activated carbon layer, the cylindrical net cage (703) is sleeved on the outside of the transmission shaft (501), the connecting rod (5010) is slidably penetrated through the top cylindrical net cage (703) through a linear bearing.

7. An EDI desalination device according to claim 6, wherein: The inside of the fourth sliding groove (701) is provided with a spring (704), one end of the spring (704) is connected with the inner wall of the fourth sliding groove (701), the other end of the spring (704) away from the inner wall of the fourth sliding groove (701) is connected with the fourth sliding block (702).

8. An EDI desalination device according to claim 7, wherein: The horizontal rod (607) is connected with a vertical rod (705), the other end of the vertical rod (705) away from the horizontal rod (607) is connected with a brush plate (706), the brush plate (706) is in contact with the cylindrical net cage (703).

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