CN110759438A - Electric capacity desalination filter core and have water treatment facilities of this filter core - Google Patents

Abstract

A capacitive desalination filter element is provided with a capacitive desalination unit, the interior of the capacitive desalination unit is provided with a flow channel for the flow of raw water, the length of the flow channel of the raw water in the capacitive desalination unit is defined as A, the width of the capacitive desalination unit Defined as B, there exists A>B>0. The capacitance desalination filter element of the present invention keeps the volume unchanged, so that the length of the flow channel of the raw water in the capacitance desalination unit is increased, thereby improving the desalination effect. At the same time, because the volume of the capacitor desalination filter element remains unchanged, and the length of the flow channel increases, the flow rate of the raw water in the capacitor desalination unit is increased, which can reduce the double electrode layer, improve the desalination efficiency, improve the anti-pollution performance and prolong the life of the capacitor desalination filter element. A water treatment device with a capacitor desalination filter element has a capacitor desalination filter element and a shell. The water treatment device has the characteristics of simple structure, small volume, no noise and no need for pressurization, and can be directly assembled in a faucet.

Description

Capacitive desalination filter element and water treatment device with the same

technical field

The invention relates to the field of household capacitor desalination water production, in particular to a capacitor desalination filter element and a water treatment device having the filter element.

Background technique

Capacitive desalination technology uses charged electrodes to adsorb ions in water, ions are gradually enriched in the electrodes on both sides, and the ion concentration in the channel is greatly reduced to achieve the purpose of water purification. When the electrode is regenerated, the electrode is reversely connected or short-circuited, and the surface of the electrode is rapidly desorbed by the adsorbed ions, which is carried away by the water flow in the channel to form concentrated water. Capacitive desalination filters can also absorb residual chlorine and organic pollutants in water. The volume limitation of the capacitor desalination filter element in the prior art results in the limitation of the length of the flow channel, and the length of the flow channel is only the width of the capacitor unit layer, thereby affecting the desalination efficiency.

Therefore, in view of the deficiencies of the prior art, it is necessary to provide a capacitive desalination filter element and a water treatment device having the same to solve the deficiencies of the prior art.

SUMMARY OF THE INVENTION

One of the objectives of the present invention is to avoid the shortcomings of the prior art and provide a capacitive desalination filter element. The capacitive desalination filter element can increase the length of the flow channel without increasing the volume, thereby improving the desalination efficiency.

The above-mentioned purpose of the present invention is achieved through the following technical measures:

A capacitor desalination filter element is provided, which is provided with a capacitor desalination unit, and a flow channel for the flow of raw water is arranged inside the capacitor desalination unit, and the length of the flow channel of the raw water in the capacitor desalination unit is defined as A, and the length of the flow channel of the capacitor desalination unit is defined as A. The width is defined as B, and there is A>B>0.

Preferably, the above A≥1.5B.

Preferably, the capacitor desalination unit is a rectangular capacitor desalination unit.

Preferably, the two long sides of the rectangular capacitive desalination unit are defined as end sides, and the two broad sides are defined as side sides.

The capacitor desalination filter element of the present invention is a capacitor desalination filter element with side water inlet and side water outlet, a capacitor desalination filter element with end water inlet and end water outlet, a capacitor desalination filter element with end water inlet and side outlet water, or side water inlet and side outlet capacitor desalination filter element. filter element.

The capacitor desalination filter element of the present invention is also provided with a central pipe assembly.

Preferably, the above-mentioned capacitive desalination unit is rolled and assembled in the center of the central tube assembly.

The central pipe assembly is a non-closed central pipe assembly and is connected to the water circuit of the capacitive desalination unit; or

The central tube assembly is a closed central tube assembly.

Preferably, the capacitor desalination unit is spirally wound and assembled into a columnar capacitor desalination filter element with a broad side as the center and the side as the center.

The broad side is defined as the first width, the other broad side opposite to the first width is defined as the second width, one long side is defined as the first length, and the other long side opposite to the first length is defined as the second width. long.

Preferably, the first width is the raw water inlet, and the second width is the pure water outlet.

The raw water flows to the raw water inlet through one end face of the central pipe assembly, the raw water is adsorbed by the electrode to obtain pure water, and the pure water is discharged from the capacitor desalination filter element through the pure water outlet.

Preferably, the second width is the raw water inlet, and the first width is the pure water outlet.

The raw water enters through the raw water inlet, and the raw water undergoes electrode adsorption to obtain pure water.

Preferably, the first width is the raw water inlet, and the second width is the pure water outlet.

The raw water flows to the raw water inlet through the two end faces of the central pipe assembly, the raw water is adsorbed by the electrode to obtain pure water, and the pure water is discharged from the capacitor desalination filter element through the pure water outlet.

Preferably, the above-mentioned central pipe assembly is provided with a first central sub-pipe for the entry of raw water and a second central sub-pipe for pure water discharge; the first central sub-pipe and the second central sub-pipe respectively abut against the first width and The first central sub-tube and the second central sub-tube are not in communication.

Preferably, one side of the first width is provided with a raw water inlet, and the other side of the first width is provided with a pure water outlet.

The raw water enters the raw water inlet through the first central sub-pipe. The raw water undergoes flow direction change in the capacitor desalination unit and undergoes electrode adsorption to obtain pure water. The pure water flows from the pure water outlet to the second central sub-pipe, and finally discharges the capacitive desalination filter element.

Preferably, the above-mentioned central pipe assembly is provided with a first central sub-pipe and a second central sub-pipe for the entry of raw water; the first central sub-pipe and the second central sub-pipe are respectively in contact with the first width, and the first central sub-pipe and The second central subtube is not connected.

Preferably, the first wide side is provided with a raw water inlet, the second long side is provided with a pure water outlet, and the pure water outlet is in contact with the second central sub-pipe.

The raw water enters the raw water inlet through the first central sub-pipe, and the raw water undergoes flow direction change in the capacitor desalination unit and undergoes electrode adsorption to obtain pure water, and the pure water is discharged from the pure water outlet to the capacitor desalination filter element.

Preferably, the above-mentioned central pipe assembly is provided with a first central sub-pipe and a second central sub-pipe for the entry of raw water; the first central sub-pipe and the second central sub-pipe are respectively in contact with the first width, and the first central sub-pipe and The second central subtube is not connected.

Preferably, the first wide side is provided with a raw water inlet, the second wide side is provided with a pure water outlet, and the pure water outlet is far from the first length.

The raw water enters the raw water inlet through the first central sub-pipe, and the raw water undergoes flow direction change in the capacitor desalination unit and undergoes electrode adsorption to obtain pure water, and the pure water is discharged from the pure water outlet to the capacitor desalination filter element.

Preferably, the first long side is provided with a raw water inlet, the second long side is provided with a pure water outlet, and the pure water outlet and the raw water inlet are respectively away from the second width.

The raw water enters the capacitor desalination unit through the raw water inlet, and the raw water undergoes flow direction change in the capacitor desalination unit and undergoes electrode adsorption to obtain pure water, and the pure water is discharged from the pure water outlet of the capacitor desalination filter element.

Preferably, the first long side is provided with a raw water inlet, and the raw water inlet is far from the second width.

Preferably, the second long side is provided with a pure water outlet, and the pure water outlet is far from the first width.

The raw water enters the capacitor desalination unit through the raw water inlet, and the raw water undergoes flow direction change in the capacitor desalination unit and undergoes electrode adsorption to obtain pure water, and the pure water is discharged from the pure water outlet of the capacitor desalination filter element.

Preferably, the above-mentioned capacitive desalination unit is provided with a first subunit layer and a second subunit layer, and the first subunit layer and the second subunit layer are connected in series.

The first subunit layer and the second subunit layer are arranged in layers, and the first subunit layer and the second subunit layer are spirally wound and assembled with the central tube assembly as the center respectively.

Preferably, the first subunit layer and the second subunit layer are both rectangular structures.

The broad side of the first subunit layer close to the central tube assembly is defined as the first width a, the other broad side opposite to the first width a is defined as the second width a, and a long side is defined as the first length a, and The other long side opposite to the first length a is defined as the second length a.

The broad side of the second subunit layer close to the central tube assembly is defined as the first width b, the other broad side opposite to the first width b is defined as the second width b, and a long side is defined as the first length b, and The other long side opposite to the first length b is defined as the second length b.

Preferably, the above-mentioned second length a is provided with a raw water inlet, and the raw water inlet is far away from the second width a.

Preferably, the first length a is provided with a primary treatment water outlet, and the primary treatment water outlet is far away from the first width a.

Preferably, the first length b is provided with a primary treatment water inlet, the primary treatment water inlet is far away from the second width b, and the primary treatment water inlet and the primary treatment water outlet are located on the same end face of the capacitor desalination filter element.

Preferably, the second length b is provided with a pure water outlet, the pure water outlet is far away from the first width b, and the pure water outlet and the raw water inlet are located on the same end face of the capacitor desalination filter element.

The raw water enters the first sub-unit layer from the raw water inlet, and the raw water undergoes electrode adsorption in the first sub-unit layer to obtain primary treated water. The primary treated water is discharged from the first subunit layer through the primary treated water outlet. The water inlet enters the second subunit layer, and the initially treated water undergoes electrode adsorption in the second subunit layer to obtain pure water, and the pure water is discharged from the second subunit layer through the pure water outlet.

Preferably, the first long side is provided with a first water inlet for raw water, and the first water inlet for raw water is far away from the first width.

Preferably, the second long side is provided with a second water inlet for raw water, and the second water inlet for raw water is far away from the first width.

Preferably, the above-mentioned second width is a pure water outlet.

The raw water enters the capacitor desalination unit through the first raw water inlet and the second raw water inlet respectively, and the raw water undergoes electrode adsorption in the capacitor desalination unit to obtain pure water, and the pure water is discharged from the pure water outlet of the capacitor desalination filter element.

Preferably, the above-mentioned capacitive desalination unit is a capacitive desalination unit in which the flow direction of the raw water is changed or sealed through a sealing strip.

Preferably, the above flow direction transformation is a 180° flow direction transformation.

Preferably, the above-mentioned flow direction changes are multiple flow direction changes.

Preferably, the above-mentioned capacitive desalination unit is provided with two layers of current collectors, two layers of carbon electrodes, a separator and an insulating layer. A layer of current collector layers are stacked in sequence.

Preferably, the above-mentioned capacitive desalination units are provided in plural.

A plurality of the capacitive desalination units are respectively connected in parallel.

Preferably, the current collector layer is a carbon fiber mesh layer, a carbon fiber cloth layer, a graphite paper layer, a graphite felt layer, a carbon felt layer, a titanium mesh layer, a stainless steel mesh layer or a nickel mesh layer.

Preferably, the above-mentioned carbon electrodes are activated carbon particle electrodes, carbon aerogel electrodes, carbon nanotube electrodes and graphene electrodes.

The capacitive desalination repeating unit of the present power generation is also provided with an anion exchange membrane and a cation exchange membrane.

Preferably, the anion exchange membrane is attached to one layer of carbon electrodes, and the cation exchange membrane is attached to the other layer of carbon electrodes.

The capacitive desalination repeating unit of the present power generation is further provided with an anion exchange coating and a cation exchange coating.

One layer of the carbon electrode surface is coated with an anion exchange coating, and the other layer of the carbon electrode surface is coated with a cation exchange coating.

Preferably, the above-mentioned separators are polypropylene separators, nylon separators or polyester separators.

Preferably, the thickness of the above-mentioned separator is 0.05mm˜2mm.

Preferably, the flow channel is a space between a layer of carbon electrodes, a separator and a layer of carbon electrodes.

A capacitor desalination filter element of the present invention is provided with a capacitor desalination unit. The capacitor desalination unit is provided with a flow channel for the flow of raw water. The length of the flow channel of the raw water in the capacitor desalination unit is defined as A, and the capacitor desalination unit The width of the cell is defined as B, and there is A>B>0. The capacitance desalination filter element of the present invention keeps the volume unchanged, so that the length of the flow channel of the raw water in the capacitance desalination unit is increased, thereby improving the desalination effect. At the same time, because the volume of the capacitor desalination filter element remains unchanged, and the length of the flow channel increases, the flow rate of the raw water in the capacitor desalination unit is increased, which can reduce the double electrode layer, improve the desalination efficiency, improve the anti-pollution performance and prolong the life of the capacitor desalination filter element.

Another object of the present invention is to avoid the shortcomings of the prior art and provide a water treatment device with a capacitive desalination filter element. The water treatment device with the capacitive desalination filter element can increase the length of the flow channel without increasing the volume, thereby improving the desalination efficiency.

The above-mentioned purpose of the present invention is achieved through the following technical measures:

Provided is a water treatment device with a capacitor desalination filter element, which has the above-mentioned capacitor desalination filter element and a housing, and the capacitor desalination filter element is assembled inside the housing.

A water treatment device with a capacitor desalination filter element of the present invention has a capacitor desalination filter element and a casing, and the length of the flow channel of the raw water in the capacitor desalination unit is increased when the volume is kept constant, thereby improving the desalination effect. At the same time, because the volume of the capacitor desalination filter element remains unchanged, and the length of the flow channel increases, the flow rate of the raw water in the capacitor desalination unit is increased, which can reduce the double electrode layer, improve the desalination efficiency, improve the anti-pollution performance and prolong the life of the capacitor desalination filter element. The water treatment device also has the characteristics of simple structure, small volume, no noise and no need for pressurization, and can be directly assembled on the faucet.

Description of drawings

The present invention will be further described by using the accompanying drawings, but the content in the accompanying drawings does not constitute any limitation to the present invention.

1 is a schematic diagram of the flow direction of a capacitor desalination filter element in Embodiment 2, wherein (1) in FIG. 1 is a schematic diagram of the flow direction when a columnar capacitor desalination filter element is used, and (2) in FIG. 1 is a flow channel when the capacitor desalination unit is unfolded. Schematic diagram of the cross section.

Fig. 2 is a schematic diagram of the flow direction of a capacitor desalination filter element according to Example 3, wherein (1) in Fig. 2 is a schematic diagram of the flow direction of a columnar capacitor desalination filter element, and (2) in Fig. 2 is a flow channel when the capacitor desalination unit is unfolded Schematic diagram of the cross section.

3 is a schematic diagram of the flow direction of a capacitor desalination filter element of Example 4, wherein (1) in FIG. 3 is a schematic diagram of the flow direction of a columnar capacitor desalination filter element, and (2) in FIG. 3 is a flow channel when the capacitor desalination unit is unfolded Schematic diagram of the cross section.

Fig. 4 is a schematic diagram of the flow direction of a capacitor desalination filter element according to Example 5, wherein (1) in Fig. 4 is a schematic diagram of the flow direction of a columnar capacitor desalination filter element, and (2) in Fig. 4 is a flow channel when the capacitor desalination unit is unfolded Schematic diagram of the cross section.

Fig. 5 is a schematic diagram of the flow direction of a capacitor desalination filter element according to Example 6, wherein (1) in Fig. 5 is a schematic diagram of the flow direction of a columnar capacitor desalination filter element, and (2) in Fig. 5 is a flow channel when the capacitor desalination unit is unfolded Schematic diagram of the cross section.

6 is a schematic diagram of the flow direction of a capacitor desalination filter element in Example 7, wherein (1) in FIG. 6 is a schematic diagram of the flow direction when a columnar capacitor desalination filter element is used, and (2) in FIG. 6 is a flow channel when the capacitor desalination unit is unfolded. Schematic diagram of the cross section.

Fig. 7 is a schematic diagram of the flow direction of a capacitor desalination filter element according to Example 8, wherein (1) in Fig. 7 is a schematic diagram of the flow direction of a columnar capacitor desalination filter element, and (2) in Fig. 7 is a flow channel when the capacitor desalination unit is unfolded Schematic diagram of the cross section.

Fig. 8 is a schematic diagram of the flow direction of a capacitor desalination filter element according to Example 9, wherein (1) in Fig. 8 is a schematic diagram of the flow direction of a columnar capacitor desalination filter element, and (2) in Fig. 8 is a flow channel when the capacitor desalination unit is unfolded Schematic diagram of the cross section.

9 is a schematic diagram of the flow direction of a capacitor desalination filter element according to Embodiment 10, wherein (1) in FIG. 9 is a schematic diagram of the flow direction of a columnar capacitor desalination filter element, and (2) in FIG. 9 is a flow channel when the capacitor desalination unit is unfolded Schematic diagram of the cross section.

Fig. 10 is a schematic diagram of the flow direction of a capacitor desalination filter element according to Example 11, wherein (1) in Fig. 10 is a schematic diagram of the flow direction of a columnar capacitor desalination filter element, and (2) in Fig. 10 is a flow channel when the capacitor desalination unit is unfolded Schematic diagram of the cross section.

FIG. 11 is a schematic structural diagram of the capacitive desalination unit of Example 12. FIG.

In Figure 1 to Figure 11, including:

Capacitive desalination unit 1, first subunit layer 11, second subunit layer 12,

The central tube assembly 2, the first central sub-tube 21, the second central sub-tube 22,

sealing strip 3.

collector layer 4,

Carbon electrode 5,

Separator 6,

insulating layer 7,

runner 8.

Detailed ways

The technical solutions of the present invention will be further described with reference to the following examples.

Example 1.

A capacitive desalination filter element is provided with a capacitive desalination unit 1, and a flow channel 8 for the flow of raw water is arranged inside the capacitive desalination unit 1, and the length of the flow channel 8 of the raw water in the capacitive desalination unit 1 is defined as A, the The width of the capacitive desalination unit 1 is defined as B, and A>B>0 exists.

In the capacitor desalination filter element of the present invention, further A≥1.5B. The flow channel of the present invention does not directly flow from one long side of the capacitive desalination unit 1 to the other long side as in the prior art, so the flow channel 8 of the present invention will be larger than the width of the capacitive desalination unit 1 .

The capacitor desalination unit 1 of the present invention is a rectangular capacitor desalination unit 1 .

The two long sides of the rectangular capacitive desalination unit 1 are defined as end sides, and the two broad sides are defined as side sides.

The capacitor desalination filter element of the present invention is a capacitor desalination filter element with side water inlet and side water outlet, a capacitor desalination filter element with end water inlet and end water outlet, a capacitor desalination filter element with end water inlet and side outlet water, or side water inlet and side outlet capacitor desalination filter element. The specific implementation of the filter element depends on the actual situation. The capacitor desalination filter element in this embodiment is a side water inlet and side water outlet capacitor desalination filter element.

It should be noted that, the side inlet and side outlet capacitor desalination filter elements of the present invention can be one wide side for in and out, and the other wide side for water outlet, or the raw water can be converted in the flow direction of the capacitor desalination unit 1 so that the same wide side enters. water and effluent. The principle of the capacitor desalination filter element for the end-side water inlet and the end-side water outlet is the same as that of the side water inlet and the side water outlet capacitor desalination filter element.

The capacitor desalination filter element of the present invention is further provided with a central pipe assembly 2 , and the capacitive desalination unit 1 is rolled and assembled in the center of the central pipe assembly 2 .

The central pipe assembly 2 of the present invention is a non-closed central pipe assembly 2 and is connected to the capacitor desalination unit 1 by water. The central pipe assembly 2 can also be a closed central pipe assembly 2. The selection of the central pipe assembly 2 is selected according to the actual situation. An example is the non-enclosed central tube assembly 2 .

The capacitor desalination unit 1 of the present invention is spirally wound and assembled into a columnar capacitor desalination filter element with a broad side as the center and the side as the center. The broad side is defined as the first width, the other broad side opposite to the first width is defined as the second width, one long side is defined as the first length, and the other long side opposite to the first length is defined as the second width. long.

The capacitor desalination filter element is provided with a capacitor desalination unit 1, the length of the raw water in the flow channel 8 of the capacitor desalination unit 1 is defined as A, the width of the capacitor desalination unit 1 is defined as B, and A>B>0 exists. The capacitance desalination filter element of the present invention increases the length of the flow channel 8 of the raw water in the capacitance desalination unit 1 while keeping the volume unchanged, thereby improving the desalination effect. At the same time, because the volume of the capacitor desalination filter element remains unchanged, the flow channel 8 increases, thereby increasing the flow rate of the raw water inside the capacitor desalination unit 1, which can reduce the double electrode layer, improve the desalination efficiency, improve the anti-pollution performance and prolong the life of the capacitor desalination filter element.

Example 2.

A capacitor desalination filter element, as shown in Figure 1, has the same features as in Embodiment 1, except that the first width is the raw water inlet, and the second width is the pure water outlet.

The raw water flows to the raw water inlet through one end face of the central pipe assembly 2, and the raw water undergoes electrode adsorption to obtain pure water, and the pure water is discharged from the capacitor desalination filter element through the pure water outlet.

The capacitor desalination filter element is provided with a capacitor desalination unit 1, the length of the raw water in the flow channel 8 of the capacitor desalination unit 1 is defined as A, the width of the capacitor desalination unit 1 is defined as B, and A>B>0 exists. The capacitance desalination filter element of the present invention increases the length of the flow channel 8 of the raw water in the capacitance desalination unit 1 while keeping the volume unchanged, thereby improving the desalination effect. At the same time, because the volume of the capacitor desalination filter element remains unchanged, the flow channel 8 increases, thereby increasing the flow rate of the raw water inside the capacitor desalination unit 1, which can reduce the double electrode layer, improve the desalination efficiency, improve the anti-pollution performance and prolong the life of the capacitor desalination filter element.

Example 3.

A capacitor desalination filter element, as shown in Figure 2, has the same features as in Example 1, except that the second width is the raw water inlet, and the first width is the pure water outlet.

The raw water enters through the raw water inlet, and the raw water undergoes electrode adsorption to obtain pure water. The capacitor desalination filter element is provided with a capacitor desalination unit 1, the length of the raw water in the flow channel 8 of the capacitor desalination unit 1 is defined as A, the width of the capacitor desalination unit 1 is defined as B, and A>B>0 exists. The capacitance desalination filter element of the present invention increases the length of the flow channel 8 of the raw water in the capacitance desalination unit 1 while keeping the volume unchanged, thereby improving the desalination effect. At the same time, because the volume of the capacitor desalination filter element remains unchanged, the flow channel 8 increases, thereby increasing the flow rate of the raw water inside the capacitor desalination unit 1, which can reduce the double electrode layer, improve the desalination efficiency, improve the anti-pollution performance and prolong the life of the capacitor desalination filter element.

Example 4.

A capacitive desalination filter element, as shown in Figure 3, has the same features as in Example 1, except that the first width is the raw water inlet, and the second width is the pure water outlet.

The raw water flows to the raw water inlet through the two end faces of the central pipe assembly 2 respectively, and the raw water is adsorbed by the electrode to obtain pure water, and the pure water is discharged from the capacitor desalination filter element through the pure water outlet.

The capacitor desalination filter element is provided with a capacitor desalination unit 1, the length of the raw water in the flow channel 8 of the capacitor desalination unit 1 is defined as A, the width of the capacitor desalination unit 1 is defined as B, and A>B>0 exists. The capacitance desalination filter element of the present invention increases the length of the flow channel 8 of the raw water in the capacitance desalination unit 1 while keeping the volume unchanged, thereby improving the desalination effect. At the same time, because the volume of the capacitor desalination filter element remains unchanged, the flow channel 8 increases, thereby increasing the flow rate of the raw water inside the capacitor desalination unit 1, which can reduce the double electrode layer, improve the desalination efficiency, improve the anti-pollution performance and prolong the life of the capacitor desalination filter element.

Example 5.

A capacitive desalination filter element, as shown in FIG. 4 , has the same features as in Embodiment 1, except that the central pipe assembly 2 is provided with a first central sub-pipe 21 for the entry of raw water and a second central sub-pipe 21 for the discharge of pure water. The central sub-pipe 22; the first central sub-pipe 21 and the second central sub-pipe 22 are respectively in contact with the first width and the first central sub-pipe 21 and the second central sub-pipe 22 are not connected.

One side of the first width is provided with a raw water inlet, and the other side of the first width is provided with a pure water outlet.

The raw water enters the raw water inlet through the first central sub-pipe 21, the raw water undergoes flow direction change in the capacitor desalination unit 1 and undergoes electrode adsorption to obtain pure water, the pure water flows from the pure water outlet to the second central sub-pipe 22, and finally discharges the capacitor Desalination filter.

The capacitive desalination unit 1 of the present invention is a capacitive desalination unit 1 in which the flow direction of the raw water is changed or sealed by the sealing strip 3 . The flow direction is changed to a 180° flow direction change.

The capacitor desalination filter element is provided with a capacitor desalination unit 1, the length of the raw water in the flow channel 8 of the capacitor desalination unit 1 is defined as A, the width of the capacitor desalination unit 1 is defined as B, and A>B>0 exists. The capacitance desalination filter element of the present invention increases the length of the flow channel 8 of the raw water in the capacitance desalination unit 1 while keeping the volume unchanged, thereby improving the desalination effect. At the same time, because the volume of the capacitor desalination filter element remains unchanged, the flow channel 8 increases, thereby increasing the flow rate of the raw water inside the capacitor desalination unit 1, which can reduce the double electrode layer, improve the desalination efficiency, improve the anti-pollution performance and prolong the life of the capacitor desalination filter element.

Example 6.

A capacitive desalination filter element, as shown in Figure 5, has the same features as in Embodiment 1, except that the central pipe assembly 2 is provided with a first central sub-pipe 21 and a second central sub-pipe 22 for the entry of raw water; A central sub-pipe 21 and a second central sub-pipe 22 are respectively in contact with the first width and the first central sub-pipe 21 and the second central sub-pipe 22 are not connected.

The first wide side is provided with a raw water inlet, and the second long side is provided with a pure water outlet, and the pure water outlet is in contact with the second central sub-pipe 22 .

The raw water enters the raw water inlet through the first central sub-pipe 21, and the raw water undergoes flow direction change in the capacitor desalination unit 1 and undergoes electrode adsorption to obtain pure water, and the pure water is discharged from the pure water outlet of the capacitor desalination filter element.

The capacitive desalination unit 1 of the present invention is a capacitive desalination unit 1 in which the flow direction of the raw water is changed or sealed by the sealing strip 3 . The flow direction is changed to a 180° flow direction change.

The capacitor desalination filter element is provided with a capacitor desalination unit 1, the length of the raw water in the flow channel 8 of the capacitor desalination unit 1 is defined as A, the width of the capacitor desalination unit 1 is defined as B, and A>B>0 exists. The capacitance desalination filter element of the present invention increases the length of the flow channel 8 of the raw water in the capacitance desalination unit 1 while keeping the volume unchanged, thereby improving the desalination effect. At the same time, because the volume of the capacitor desalination filter element remains unchanged, the flow channel 8 increases, thereby increasing the flow rate of the raw water inside the capacitor desalination unit 1, which can reduce the double electrode layer, improve the desalination efficiency, improve the anti-pollution performance and prolong the life of the capacitor desalination filter element.

Example 7.

A capacitive desalination filter element, as shown in FIG. 6 , has the same other features as Embodiment 1, except that the central pipe assembly 2 is provided with a first central sub-pipe 21 and a second central sub-pipe 22 for the entry of raw water; A central sub-pipe 21 and a second central sub-pipe 22 are respectively in contact with the first width and the first central sub-pipe 21 and the second central sub-pipe 22 are not connected.

The first wide side is provided with a raw water inlet, the second wide side is provided with a pure water outlet, and the pure water outlet is far from the first length.

The raw water enters the raw water inlet through the first central sub-pipe 21, and the raw water undergoes flow direction change in the capacitor desalination unit 1 and undergoes electrode adsorption to obtain pure water, and the pure water is discharged from the pure water outlet of the capacitor desalination filter element.

The capacitive desalination unit 1 of the present invention is a capacitive desalination unit 1 in which the flow direction of the raw water is changed or sealed by the sealing strip 3 . The flow direction is changed to a 180° flow direction change.

The flow direction transition in this embodiment is two flow direction transitions.

The capacitor desalination filter element is provided with a capacitor desalination unit 1, the length of the raw water in the flow channel 8 of the capacitor desalination unit 1 is defined as A, the width of the capacitor desalination unit 1 is defined as B, and A>B>0 exists. The capacitance desalination filter element of the present invention increases the length of the flow channel 8 of the raw water in the capacitance desalination unit 1 while keeping the volume unchanged, thereby improving the desalination effect. At the same time, because the volume of the capacitor desalination filter element remains unchanged, the flow channel 8 increases, thereby increasing the flow rate of the raw water inside the capacitor desalination unit 1, which can reduce the double electrode layer, improve the desalination efficiency, improve the anti-pollution performance and prolong the life of the capacitor desalination filter element.

Example 8.

A capacitive desalination filter element, as shown in Figure 7, has the same features as in Example 1, except that the first long side is provided with a raw water inlet, and the second long side is provided with a pure water outlet. The water outlet, the pure water outlet and the raw water inlet are respectively away from the second width.

The raw water enters the capacitor desalination unit 1 through the raw water inlet, and the raw water undergoes flow change in the capacitor desalination unit 1 and undergoes electrode adsorption to obtain pure water, and the pure water is discharged from the pure water outlet of the capacitor desalination filter element.

The capacitive desalination unit 1 of the present invention is a capacitive desalination unit 1 in which the flow direction of the raw water is changed or sealed by the sealing strip 3 . The flow direction is changed to a 180° flow direction change.

The capacitor desalination filter element is provided with a capacitor desalination unit 1, the length of the raw water in the flow channel 8 of the capacitor desalination unit 1 is defined as A, the width of the capacitor desalination unit 1 is defined as B, and A>B>0 exists. The capacitance desalination filter element of the present invention increases the length of the flow channel 8 of the raw water in the capacitance desalination unit 1 while keeping the volume unchanged, thereby improving the desalination effect. At the same time, because the volume of the capacitor desalination filter element remains unchanged, the flow channel 8 increases, thereby increasing the flow rate of the raw water inside the capacitor desalination unit 1, which can reduce the double electrode layer, improve the desalination efficiency, improve the anti-pollution performance and prolong the life of the capacitor desalination filter element.

Example 9.

A capacitive desalination filter element, as shown in Figure 8, has the same features as in Example 1, except that the first long side is provided with a raw water inlet, and the raw water inlet is far from the second width.

The second long side is provided with a pure water outlet, and the pure water outlet is far from the first width.

The raw water enters the capacitor desalination unit 1 through the raw water inlet, and the raw water undergoes flow change in the capacitor desalination unit 1 and undergoes electrode adsorption to obtain pure water, and the pure water is discharged from the pure water outlet of the capacitor desalination filter element.

The capacitive desalination unit 1 of the present invention is a capacitive desalination unit 1 in which the flow direction of the raw water is changed or sealed by the sealing strip 3 . The flow direction is changed to a 180° flow direction change.

The flow direction transition in this embodiment is two flow direction transitions.

The capacitor desalination filter element is provided with a capacitor desalination unit 1, the length of the raw water in the flow channel 8 of the capacitor desalination unit 1 is defined as A, the width of the capacitor desalination unit 1 is defined as B, and A>B>0 exists. The capacitance desalination filter element of the present invention increases the length of the flow channel 8 of the raw water in the capacitance desalination unit 1 while keeping the volume unchanged, thereby improving the desalination effect. At the same time, because the volume of the capacitor desalination filter element remains unchanged, the flow channel 8 increases, thereby increasing the flow rate of the raw water inside the capacitor desalination unit 1, which can reduce the double electrode layer, improve the desalination efficiency, improve the anti-pollution performance and prolong the life of the capacitor desalination filter element.

Example 10.

A capacitive desalination filter element, as shown in Figure 9, has the same other features as in Example 1, except that:

The capacitive desalination unit 1 is provided with a first subunit layer 11 and a second subunit layer 12, and the first subunit layer 11 and the second subunit layer 12 are connected in series.

The first subunit layer 11 and the second subunit layer 12 are arranged in layers, and the first subunit layer 11 and the second subunit layer 12 are spirally wound and assembled with the center tube assembly 2 as the center, respectively.

Both the first subunit layer 11 and the second subunit layer 12 have a rectangular structure.

The broad side of the first subunit layer 11 close to the central tube assembly 2 is defined as the first width a, the other broad side opposite to the first width a is defined as the second width a, and a long side is defined as the first length a , and the other long side opposite to the first length a is defined as the second length a.

The broad side of the second subunit layer 12 close to the central tube assembly 2 is defined as the first width b, the other broad side opposite to the first width b is defined as the second width b, and a long side is defined as the first length b , and the other long side opposite to the first length b is defined as the second length b.

The second length a is provided with a raw water inlet, and the raw water inlet is far from the second width a.

The first length a is provided with a primary treatment water outlet, and the primary treatment water outlet is far away from the first width a.

The first length b is provided with a water inlet for preliminary treatment, which is far from the second width b, and the water inlet for preliminary treatment and the water outlet for preliminary treatment are located on the same end face of the capacitor desalination filter element.

The second length b is provided with a pure water outlet, the pure water outlet is far from the first width b, and the pure water outlet and the raw water inlet are located on the same end face of the capacitor desalination filter element.

The raw water enters the first subunit layer 11 from the raw water inlet, and the raw water undergoes electrode adsorption in the first subunit layer 11 to obtain primary treated water. The primary treated water is discharged from the first subunit layer 11 through the primary treated water outlet, and then the primary treated water The primary treated water enters the second subunit layer 12 through the water inlet, the primary treated water undergoes electrode adsorption in the second subunit layer 12 to obtain pure water, and the pure water is discharged from the second subunit layer 12 through the pure water outlet.

The capacitor desalination filter element is provided with a capacitor desalination unit 1, the length of the raw water in the flow channel 8 of the capacitor desalination unit 1 is defined as A, the width of the capacitor desalination unit 1 is defined as B, and A>B>0 exists. The capacitance desalination filter element of the present invention increases the length of the flow channel 8 of the raw water in the capacitance desalination unit 1 while keeping the volume unchanged, thereby improving the desalination effect. At the same time, because the volume of the capacitor desalination filter element remains unchanged, the flow channel 8 increases, thereby increasing the flow rate of the raw water inside the capacitor desalination unit 1, which can reduce the double electrode layer, improve the desalination efficiency, improve the anti-pollution performance and prolong the life of the capacitor desalination filter element.

Example 11.

A capacitive desalination filter element, as shown in Figure 10, has the same other features as in Example 1, except that: the first long side is provided with a first water inlet for raw water, and the first water inlet for raw water is far from the first wide .

The second long side is provided with a second water inlet for raw water, and the second water inlet for raw water is far away from the first width.

The second width is the pure water outlet.

The raw water enters the capacitor desalination unit 1 through the first raw water inlet and the second raw water inlet respectively, and the raw water undergoes electrode adsorption in the capacitor desalination unit 1 to obtain pure water, and the pure water is discharged from the pure water outlet of the capacitor desalination filter element.

The capacitor desalination filter element is provided with a capacitor desalination unit 1, the length of the raw water in the flow channel 8 of the capacitor desalination unit 1 is defined as A, the width of the capacitor desalination unit 1 is defined as B, and A>B>0 exists. The capacitance desalination filter element of the present invention increases the length of the flow channel 8 of the raw water in the capacitance desalination unit 1 while keeping the volume unchanged, thereby improving the desalination effect. At the same time, because the volume of the capacitor desalination filter element remains unchanged, the flow channel 8 increases, thereby increasing the flow rate of the raw water inside the capacitor desalination unit 1, which can reduce the double electrode layer, improve the desalination efficiency, improve the anti-pollution performance and prolong the life of the capacitor desalination filter element.

Example 12.

A capacitive desalination filter element, as shown in Figure 11, has the same other features as in Example 1, except that the capacitive desalination unit 1 is provided with two layers of current collectors 4, two layers of carbon electrodes 5, a separator 6 and an insulating layer 7, and according to the insulating layer 7, one layer of current collector layer 4, one layer of carbon electrode 5, separator 6, one layer of carbon electrode 5 and one layer of current collector layer 4 are sequentially stacked.

The capacitive desalination unit 1 of the present invention is provided in plural. There are two capacitive desalination units 1 in this embodiment. And the two capacitive desalination units are respectively connected in parallel.

It should be noted that the assembly method of the multi-layer capacitor desalination unit 1 of the present invention has been widely used in industrial production, and the specific interlayer assembly of the capacitor desalination unit 1 is common knowledge, so it is not repeated here.

The current collector layer 4 of the present invention is a carbon fiber mesh layer, a carbon fiber cloth layer, a graphite paper layer, a graphite felt layer, a carbon felt layer, a titanium mesh layer, a stainless steel mesh layer or a nickel mesh layer. The current collector layer 4 in this embodiment is a carbon fiber mesh layer.

It should be noted that, when the current collector layer 4 of the present invention is made of stainless steel mesh or nickel mesh, it can only be used as a cathode, and acidic water quality should be avoided. On the other hand, the current collector layer 4 is provided with a section of tabs protruding from the electrodes at the edge, and the external conductors are connected through the tabs.

The carbon electrode 5 of the present invention is an activated carbon particle electrode, a carbon aerogel electrode, a carbon nanotube electrode and a graphene electrode. The carbon electrode 5 in this embodiment is a graphene electrode.

The capacitive desalination repeating unit of the present invention is further provided with an anion exchange membrane and a cation exchange membrane, the anion exchange membrane is attached to one layer of carbon electrodes, and the cation exchange membrane is attached to the other layer of carbon electrodes. In the present invention, the capacitive desalination repeating unit is also provided with an anion exchange coating and a cation exchange coating, wherein one layer of the carbon electrode surface is coated with an anion exchange coating, and the other layer of the carbon electrode surface is coated with a cation exchange coating . In this embodiment, the capacitor desalination repeating unit is further provided with an anion exchange membrane and a cation exchange membrane, the anion exchange membrane is attached to one layer of carbon electrodes, and the cation exchange membrane is attached to the other layer of carbon electrodes. The desalination efficiency can be improved by an anion exchange membrane, a cation exchange membrane, an anion exchange membrane or a cation exchange membrane.

It should be noted that the higher the capacitance of the carbon electrode 5, the higher the ability to adsorb ions. The carbon electrode 5 doped with special adsorption materials can also realize the function of adsorbing heavy metals and special pollutants. For example, the cation chelating resin has a special selective adsorption function for lead, mercury, zinc and copper ions. In addition, the carbon electrode 5 material can also be doped with antibacterial and bactericidal materials, such as silver-loaded carbon, silver-loaded resin, or silver-loaded plastic masterbatch, to prevent bacteria from growing and polluting the water source during long-term use.

The separator 6 of the present invention is a polypropylene separator 6, a nylon separator 6 or a polyester separator 6, and the thickness of the separator 6 is 0.05 mm to 2 mm. The separator 6 in this embodiment is a polypropylene separator 6, and the thickness of the separator 6 is 1.0 mm.

The capacitor desalination filter element is provided with a capacitor desalination unit 1, the length of the raw water in the flow channel 8 of the capacitor desalination unit 1 is defined as A, the width of the capacitor desalination unit 1 is defined as B, and A>B>0 exists. The capacitance desalination filter element of the present invention increases the length of the flow channel 8 of the raw water in the capacitance desalination unit 1 while keeping the volume unchanged, thereby improving the desalination effect. At the same time, because the volume of the capacitor desalination filter element remains unchanged, the flow channel 8 increases, thereby increasing the flow rate of the raw water inside the capacitor desalination unit 1, which can reduce the double electrode layer, improve the desalination efficiency, improve the anti-pollution performance and prolong the life of the capacitor desalination filter element.

Example 13.

A water treatment device with the filter element is provided with the capacitor desalination filter element of any one of Embodiments 1 to 12 and a housing, and the capacitor desalination filter element is assembled inside the housing.

A water treatment device with a capacitor desalination filter element is provided with a capacitor desalination filter element and a housing, and the length of the flow channel 8 of the capacitor desalination unit 1 is increased by keeping the volume unchanged, thereby improving the desalination effect. At the same time, because the volume of the capacitor desalination filter element remains unchanged, the flow channel 8 increases, thereby increasing the flow rate of the raw water inside the capacitor desalination unit 1, which can reduce the double electrode layer, improve the desalination efficiency, improve the anti-pollution performance and prolong the life of the capacitor desalination filter element. The water treatment device also has the characteristics of simple structure, small volume, no noise and no need for pressurization, and can be directly assembled on the faucet.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should The technical solutions of the present invention may be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention.

Claims (31)

1. A capacitive desalination filter element, comprising: a capacitive desalination unit is arranged; a flow channel for raw water to flow is arranged in the capacitive desalting unit, the length of the flow channel of the raw water in the capacitive desalting unit is defined as A, the width of the capacitive desalting unit is defined as B, and A & gtB & gt 0 exists.

2. A capacitive desalination cartridge according to claim 1 wherein: a is more than or equal to 1.5B.

3. A capacitive desalination cartridge according to claim 1 wherein: the capacitive desalination unit is a rectangular capacitive desalination unit.

4. A capacitive desalination cartridge according to claim 3 wherein: defining two long sides of the rectangular capacitive desalination unit as end sides, and defining two wide sides as side sides;

the filter element is a side water inlet and side water outlet capacitive desalination filter element, a end water inlet and end water outlet capacitive desalination filter element, an end water inlet and side water outlet capacitive desalination filter element or a side water inlet and end water outlet capacitive desalination filter element.

5. A capacitive desalination cartridge according to claim 3 wherein: a central pipe assembly is also arranged;

the capacitive desalination unit is assembled by rolling the center of a central tube assembly.

6. A capacitive desalination cartridge according to claim 5 wherein: the central pipe assembly is a non-closed central pipe assembly and is connected with the capacitor desalination unit in a water way; or

The central tube assembly is a closed central tube assembly.

7. A capacitive desalination cartridge according to claim 5 wherein: the capacitive desalting unit is spirally coiled by taking a wide side as a center side to form a cylindrical capacitive desalting filter core;

the broadside is defined as a first width, the other broadside opposite to the first width is defined as a second width, one long side is defined as a first length, and the other long side opposite to the first length is defined as a second length.

8. A capacitive desalination cartridge according to claim 7 wherein: the first width is a raw water inlet, and the second width is a pure water outlet;

raw water flows to a raw water inlet through one end face of the central pipe assembly, the raw water is subjected to electrode adsorption to obtain pure water, and the pure water is discharged out of the capacitive desalination filter element through a pure water outlet.

9. A capacitive desalination cartridge according to claim 7 wherein: the second width is a raw water inlet, and the first width is a pure water outlet;

raw water enters through the raw water inlet, the raw water is subjected to electrode adsorption to obtain pure water, and the pure water flows to one end face of the central pipe assembly through the pure water outlet and is discharged out of the capacitive desalination filter element.

10. A capacitive desalination cartridge according to claim 7 wherein: the first width is a raw water inlet, and the second width is a pure water outlet;

raw water flows to a raw water inlet through two end faces of the central pipe assembly respectively, the raw water is subjected to electrode adsorption to obtain pure water, and the pure water is discharged out of the capacitive desalination filter element through a pure water outlet.

11. A capacitive desalination cartridge according to claim 7 wherein: the central pipe assembly is provided with a first central sub pipe for raw water to enter and a second central sub pipe for pure water to discharge; the first central sub-pipe and the second central sub-pipe are respectively abutted with the first width and are not communicated;

a raw water inlet is formed in one side of the first width, and a pure water outlet is formed in the other side of the first width;

raw water enters the raw water inlet through the first central sub-pipe, the flow direction of the raw water is changed in the capacitive desalination unit, pure water is obtained through electrode adsorption, the pure water flows to the second central sub-pipe from the pure water outlet, and finally the pure water is discharged out of the capacitive desalination filter element.

12. A capacitive desalination cartridge according to claim 7 wherein: the central pipe assembly is provided with a first central sub pipe and a second central sub pipe for raw water to enter; the first central sub-pipe and the second central sub-pipe are respectively abutted with the first width and are not communicated;

a raw water inlet is formed in one side of the first width, a pure water outlet is formed in the other side of the second length, and the pure water outlet is abutted to the second central sub-pipe;

raw water enters the raw water inlet through the first central sub-pipe, the flow direction of the raw water is changed in the capacitive desalination unit, pure water is obtained through electrode adsorption, and the pure water is discharged out of the capacitive desalination filter element from the pure water outlet.

13. A capacitive desalination cartridge according to claim 7 wherein: the central pipe assembly is provided with a first central sub pipe and a second central sub pipe for raw water to enter; the first central sub-pipe and the second central sub-pipe are respectively abutted with the first width and are not communicated;

a raw water inlet is formed in one side of the first width, a pure water outlet is formed in one side of the second width, and the pure water outlet is far away from the first length;

raw water enters the raw water inlet through the first central sub-pipe, the flow direction of the raw water is changed in the capacitive desalination unit, pure water is obtained through electrode adsorption, and the pure water is discharged out of the capacitive desalination filter element from the pure water outlet.

14. A capacitive desalination cartridge according to claim 7 wherein: a raw water inlet is formed in one side of the first length, a pure water outlet is formed in one side of the second length, and the pure water outlet and the raw water inlet are respectively far away from the second width;

raw water enters the capacitive desalination unit through the raw water inlet, the raw water is subjected to flow direction transition in the capacitive desalination unit and is subjected to electrode adsorption to obtain pure water, and the pure water is discharged out of the capacitive desalination filter element from the pure water outlet.

15. A capacitive desalination cartridge according to claim 7 wherein: a raw water inlet is formed in one side of the first length, and the raw water inlet is far away from the second width;

a pure water outlet is formed in one side of the second length, and the pure water outlet is far away from the first width;

raw water enters the capacitive desalination unit through the raw water inlet, the raw water is subjected to flow direction transition in the capacitive desalination unit and is subjected to electrode adsorption to obtain pure water, and the pure water is discharged out of the capacitive desalination filter element from the pure water outlet.

16. A capacitive desalination cartridge according to claim 6 wherein: the capacitive desalination unit is provided with a first subunit layer and a second subunit layer, and the first subunit layer and the second subunit layer are connected in series;

the first sub-unit layer and the second sub-unit layer are arranged in a stacked mode and are spirally rolled and assembled by taking the central pipe assembly as the center;

the first subunit layer and the second subunit layer are both rectangular structures;

defining a first width a on a wide side of the first subunit layer close to the central tube assembly, a second width a on another wide side opposite to the first width a, a first length a on one long side, and a second length a on another long side opposite to the first length a;

a broadside of the second subunit layer adjacent to the central tube assembly is defined as a first width b, another broadside opposite to the first width b is defined as a second width b, one long side is defined as a first length b, and another long side opposite to the first length b is defined as a second length b.

17. A capacitive desalination cartridge according to claim 16 wherein: the second length a is provided with a raw water inlet, and the raw water inlet is far away from the second width a;

the first length a is provided with a primary treated water outlet, and the primary treated water outlet is far away from the first width a;

the first length b is provided with a primary treatment water inlet, the primary treatment water inlet is far away from the second width b, and the primary treatment water inlet and the primary treatment water outlet are positioned on the same end surface of the capacitive desalination filter element;

the second length b is provided with a pure water outlet, the pure water outlet is far away from the first width b, and the pure water outlet and the raw water inlet are positioned on the same end face of the capacitive desalination filter element;

raw water enters the first subunit layer from the raw water inlet, the raw water is subjected to electrode adsorption in the first subunit layer to obtain primary treatment water, the primary treatment water is discharged out of the first subunit layer through the primary treatment water outlet, then the primary treatment water enters the second subunit layer through the primary treatment water inlet, the primary treatment water is subjected to electrode adsorption in the second subunit layer to obtain pure water, and the pure water is discharged out of the second subunit layer through the pure water outlet.

18. A capacitive desalination cartridge according to claim 7 wherein: a first raw water inlet is formed in one side of the first length and is far away from the first width;

a raw water second water inlet is formed in one side of the second length and is far away from the first width;

the second width is a pure water outlet;

raw water enters the capacitive desalination unit through the first raw water inlet and the second raw water inlet respectively, the raw water is subjected to electrode adsorption in the capacitive desalination unit to obtain pure water, and the pure water is discharged from the pure water outlet of the capacitive desalination filter element.

19. A capacitive desalination cartridge according to claim 1 wherein: the capacitive desalination unit is a capacitive desalination unit which enables the flow direction of raw water to be changed or sealed through a sealing strip.

20. A capacitive desalination cartridge according to claim 11, 12, 13, 14 or 15 wherein: the flow direction transitions to 180 deg. flow direction transition.

21. A capacitive desalination cartridge according to claim 11, 12, 13, 14 or 15 wherein: the flow direction transitions to a plurality of flow direction transitions.

22. A capacitive desalination cartridge according to claim 1 wherein: the capacitance desalination unit is provided with two current collector layers, two carbon electrodes, a separation net and an insulating layer, and the two current collector layers, the one carbon electrode, the separation net, the one carbon electrode and the one current collector layer are sequentially stacked.

23. A capacitive desalination cartridge according to claim 22 wherein: the capacitive desalination unit is provided in plurality.

24. A capacitive desalination cartridge according to claim 23 wherein: the plurality of capacitive desalination units are respectively connected in parallel.

25. A capacitive desalination cartridge according to claim 22 wherein: the current collector layer is a carbon fiber net layer, a carbon fiber cloth layer, a graphite paper layer, a graphite felt layer, a carbon felt layer, a titanium net layer, a stainless steel net layer or a nickel net layer.

26. A capacitive desalination cartridge according to claim 22 wherein: the carbon electrode is an activated carbon particle electrode, a carbon aerogel electrode, a carbon nanotube electrode and a graphene electrode.

27. A capacitive desalination cartridge according to claim 22 wherein: the capacitance desalting repeating unit is also provided with an anion exchange membrane and a cation exchange membrane;

the anion exchange membrane is attached to one layer of carbon electrode, and the cation exchange membrane is attached to the other layer of carbon electrode.

28. A capacitive desalination cartridge according to claim 22 wherein: the capacitive desalination repeating unit is also provided with an anion exchange coating and a cation exchange coating;

one of the carbon electrode surfaces is coated with an anion exchange coating, and the other carbon electrode surface is coated with a cation exchange coating.

29. A capacitive desalination cartridge according to claim 22 wherein: the separation net is a polypropylene separation net, a nylon separation net or a polyester separation net;

the thickness of the separation net is 0.05 mm-2 mm.

30. A capacitive desalination cartridge according to claim 22 wherein: the flow channel is a gap between a layer of carbon electrode, a separation net and a layer of carbon electrode.

31. A water treatment device with a capacitance desalination filter element is characterized in that: a capacitive desalination cartridge according to any of claims 1 to 30 and a housing, the composite capacitive desalination cartridge being mounted within the housing.

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