Coupling flow type capacitive deionization device

Abstract

The utility model belongs to the field of seawater treatment, in particular relates to a coupling flow type capacitive deionizing device, and provides the following scheme aiming at the problems of high energy consumption, complex equipment, high maintenance cost and the like which often exist in the conventional distillation method and reverse osmosis method which can effectively remove salt in seawater: the coupling flow type capacitive deionizing device comprises a device frame, a desorption area and an adsorption area are arranged in the device frame, the desorption area is located on one side of the adsorption area, the desorption area is composed of a first L module, the adsorption area is composed of a plurality of first L modules and a plurality of second L modules which are connected in parallel, and the desorption area and the adsorption area are arranged in parallel. And continuous desorption and efficient utilization: a first L module is adopted in a desorption area, and continuous desorption is carried out through reverse connection of electrodes, so that cyclic utilization of electrode liquid is ensured. By expanding the internal groove and the cavity and increasing the reverse connection voltage, the smooth desorption of the electrode liquid is ensured, so that the utilization rate of the electrode material and the overall performance of the system are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of seawater treatment, in particular to a coupled flow-type capacitive deionization device. Background Art

[0002] With the intensifying global energy crisis and the advocacy of carbon neutrality, wastewater treatment and resource utilization have become hot research topics in recent years. Population growth, industrialization, and water pollution are leading to water shortages in both developing and developed countries. Increasing water supplies by extracting freshwater from a range of unconventional sources, such as seawater, brackish groundwater, and wastewater discharge, is crucial to alleviating global water stress. Currently, the most widely used desalination technologies are distillation and membrane processes. Distillation primarily includes multi-stage flash evaporation and multi-effect distillation. Although distillation has been developed earlier, it suffers from numerous issues such as scaling, high energy consumption, and high costs. Membrane processes primarily include reverse osmosis, membrane distillation, and electrodialysis. While membrane processes offer lower energy consumption and higher desalination efficiency than distillation, they can become fouled during use, increasing operating costs. Therefore, the search for low-energy, high-efficiency, and low-cost desalination technologies is urgent.

[0003] Traditional desalination methods, such as distillation and reverse osmosis, can effectively remove salt from seawater, but they often suffer from high energy consumption, complex equipment, and high maintenance costs. Therefore, it is particularly important to develop a desalination technology that is efficient, energy-saving, and easy to maintain. Utility Model Content

[0004] The purpose of this utility model is to solve the problems existing in the existing technology, such as distillation and reverse osmosis, which can effectively remove salt from seawater but often have the disadvantages of high energy consumption, complex equipment and high maintenance costs. A coupled flow capacitive deionization device is proposed.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A coupled flow capacitive deionization device comprises a device frame, wherein a desorption zone and an adsorption zone are provided inside the device frame, and the desorption zone is located on one side of the adsorption zone;

[0007] The desorption zone is composed of a No. 1 L module, and the adsorption zone is composed of multiple No. 1 L modules and No. 2 L modules in parallel. The desorption zone and the adsorption zone are arranged in parallel. The No. 2 L module is located between two No. 1 L modules. The same group of deionization components for deionization is arranged between the No. 2 L module and the No. 1 L module.

[0008] In one possible design, the deionization component includes a solution chamber, a cationic membrane is provided on the side of the solution chamber close to the No. 2 L module, and an anionic membrane is provided on the side of the solution chamber close to the No. 1 L module. The solution chamber, anionic membrane and cationic membrane are arranged in parallel.

[0009] In a possible design, the first L module includes ten N modules, and the ten N modules are connected in parallel.

[0010] In a possible design, the N module includes ten M modules, and the ten M modules are connected in series.

[0011] In one possible design, the No. 1 L module is a single-sided grooved graphite plate.

[0012] In one possible design, the second L-module is a double-sided grooved graphite plate.

[0013] In this application, adsorption area: This work designs an enlarged FCDI device (size 80cm×40cm) for seawater desalination based on a laboratory-scale FCDI device (size 8cm×4cm). Figure 4 As shown in the figure, the laboratory pilot FCDI consists of an M module. Ten M modules are connected in series to form an N module. Ten N modules are connected in parallel to form a No. 1 L module. A scaled-up FCDI made from ten No. 1 L modules is then connected in parallel to form an adsorption zone. This combination ensures the FCDI's desalination efficiency and increases seawater treatment capacity. The internal graphite plates feature a double-sided groove design, saving material and reducing the device size.

[0014] Desorption zone: A No. 1 L module is used as the desorption zone of the FCDI device, and continuous desorption is performed by reverse electrode connection. By enlarging the internal grooves and chambers and increasing the reverse voltage, the desorption of the electrode solution is ensured to proceed smoothly.

[0015] By carving serpentine channels into the inner side of the current collector and coating the surface with an ion exchange membrane, the system can be divided into two electrode chambers and a desalination chamber. The flowing electrode liquid continuously circulates through the electrode chambers, where the electric field deposits anions and cations in a double layer on the carbon material surface within the electrode liquid, completing the adsorption process. After the electrode material leaves the electrode area, the electrostatically attracted anions and cations are released, returning the electrode liquid to electrical neutrality, completing the desorption process.

[0016] Beneficial Effects: Efficient Desalination and Increased Processing Capacity: By connecting multiple FCDI modules in series and parallel, the scaled-up FCDI device designed in this study significantly increases seawater processing capacity while maintaining effective desalination. This combination enables the device to be applied to larger-scale desalination needs and improves processing efficiency.

[0017] Save materials and reduce volume: The internal graphite plate adopts a double-sided groove design, which not only saves material costs but also effectively reduces the volume of the device, making the entire system more compact and easier to install and maintain.

[0018] Continuous desorption and efficient utilization: The desorption zone utilizes a single L-module and reverse electrode connection for continuous desorption, ensuring electrode solution recycling. By enlarging the internal grooves and chambers and increasing the reverse connection voltage, smooth desorption of the electrode solution is ensured, thereby improving electrode material utilization and overall system performance.

[0019] Modular Design and Ease of Scalability: The modular design of the FCDI system designed in this study makes the system easy to expand and upgrade. By adding or reducing the number of modules, the processing capacity and desalination effect can be flexibly adjusted to meet the needs of different desalination scales.

[0020] Environmental protection and energy conservation: As a low-energy, chemical-free desalination method, FCDI technology offers significant environmental advantages. Compared to traditional desalination technologies, FCDI reduces energy consumption and environmental pollution, meeting the requirements of sustainable development. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a three-dimensional structural diagram of a coupled flow capacitive deionization device proposed by the utility model;

[0022] Figure 2 This is a schematic diagram of the explosion structure of a coupled flow-type capacitive deionization device proposed by the utility model;

[0023] Figure 3 This is a schematic diagram of the internal structure of a coupled flow capacitive deionization device proposed by the present invention;

[0024] Figure 4 This is a schematic diagram of the basic principle of the flow-type capacitive deionization technology in this utility model.

[0025] In the figure: 1. Device frame; 2. Desorption zone; 3. Adsorption zone; 4. L module No. 2; 5. Solution chamber; 6. Anion membrane; 7. Cation membrane; 8. N module; 9. M module; 10. L module No. 1. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0027] Example 1; Reference Figure 1-4A coupled flow capacitive deionization device is used in the field of seawater treatment, comprising: a device frame 1, wherein a desorption zone 2 and an adsorption zone 3 are provided inside the device frame 1, and the desorption zone 2 is located on one side of the adsorption zone 3;

[0028] The desorption zone 2 is composed of a No. 1 L module 10, and the adsorption zone 3 is composed of multiple No. 1 L modules 10 and No. 2 L modules 4 in parallel. The desorption zone 2 and the adsorption zone 3 are arranged in parallel. The No. 2 L module 4 is located between the two No. 1 L modules 10. The same group of deionization components for deionization are arranged between the No. 2 L module 4 and the No. 1 L module 10. The deionization component includes a solution chamber 5. A cationic membrane 7 is provided on the side of the solution chamber 5 close to the No. 2 L module 4, and an anionic membrane 6 is provided on the side of the solution chamber 5 close to the No. 1 L module 10. The solution chamber 5, the anionic membrane 6 and the cationic membrane 7 are arranged in parallel. The No. 1 L module 10 includes ten N modules 8, and the ten N modules 8 are connected in parallel. The N module 8 includes ten M modules 9, and the ten M modules 9 are connected in series.

[0029] Example 2; Reference Figure 1-4 , improved on the basis of Example 1: the No. 1 L module 10 is a single-sided grooved graphite plate, and the No. 2 L module 4 is a double-sided grooved graphite plate.

[0030] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A coupled flow capacitive deionization device, characterized in that: include: A device frame (1), wherein a desorption zone (2) and an adsorption zone (3) are provided inside the device frame (1), and the desorption zone (2) is located on one side of the adsorption zone (3); The desorption zone (2) is composed of a No. 1 L module (10), and the adsorption zone (3) is composed of a plurality of No. 1 L modules (10) and No. 2 L modules (4) connected in parallel. The desorption zone (2) and the adsorption zone (3) are arranged in parallel, and the No. 2 L module (4) is located between two No. 1 L modules (10). The same group of deionization components for deionization is arranged between the No. 2 L module (4) and the No. 1 L module (10).

2. The coupled flow capacitive deionization device according to claim 1, characterized in that: The deionization component comprises a solution chamber (5), a cation membrane (7) is provided on a side of the solution chamber (5) close to the second L module (4), and an anion membrane (6) is provided on a side of the solution chamber (5) close to the first L module (10), wherein the solution chamber (5), the anion membrane (6) and the cation membrane (7) are arranged in parallel.

3. The coupled flow capacitive deionization device according to claim 1, characterized in that: The number one L module (10) includes ten N modules (8), and the ten N modules (8) are connected in parallel.

4. The coupled flow capacitive deionization device according to claim 3, characterized in that: The N module (8) includes ten M modules (9), and the ten M modules (9) are connected in series.

5. The coupled flow capacitive deionization device according to claim 1, characterized in that: The No. 1 L module (10) is a single-sided grooved graphite plate.

6. The coupled flow capacitive deionization device according to claim 1, characterized in that: The second L module (4) is a double-sided grooved graphite plate.

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