CN212532391U

CN212532391U - Filter core and water treatment facilities

Info

Publication number: CN212532391U
Application number: CN202020326685.XU
Authority: CN
Inventors: 陈小平
Original assignee: Foshan Viomi Electrical Technology Co Ltd
Current assignee: Guangdong Lizi Technology Co Ltd
Priority date: 2020-03-16
Filing date: 2020-03-16
Publication date: 2021-02-12
Anticipated expiration: 2030-03-16

Abstract

A filter element and water treatment equipment are provided, the filter element is provided with a membrane structure formed by radially winding more than one membrane and a spiral flow channel formed by winding the membranes, the liquid flow direction is parallel to the middle axis of the membrane structure, and a water inlet and a water outlet are respectively arranged at two ends of the membrane structure. After the membrane forming the membrane structure is unfolded, one side parallel to the central axis of the membrane structure is defined as the side edge of the membrane, and the other side perpendicular to the central axis is defined as the end edge; the water inlet of the flow channel is arranged at the end edge of one side of the membrane, and the water outlet of the flow channel is arranged at the end of the other side of the membrane. The partial or all end edges of the partial membranes on the end surface of the membrane structure are provided with water inlets. The partial or all end edges of the partial membrane of the end face of the membrane structure are provided with water outlets. The utility model discloses can compromise water purification efficiency and water purification effect.

Description

Filter core and water treatment facilities

Technical Field

The utility model relates to a water treatment technical field especially relates to a formula of book filter core and have this formula of book water treatment facilities of filter core.

Background

Ion exchange is one of the methods for extracting or removing ions from a liquid stream using ion exchange materials. Currently, ion exchange has been widely used for water purification and softening; desalting seawater and brackish water; refining and decolorizing solution (such as sugar solution). The ion exchange material has an ion exchange membrane in addition to the ion exchange resin beads and powder. The ion exchange membrane is a membrane which contains ion exchange groups and is made of high polymer materials, wherein the membrane contains all cation exchange groups and is a cation exchange membrane, and the membrane contains all anion exchange groups and is an anion exchange membrane.

The performance of the filter element is of critical importance in order to provide a high treatment effect. The filter element in the prior art often cannot give consideration to both desalination rate and efficiency. Therefore, it is necessary to provide a rolled filter element and an electrodeionization device having the same to overcome the deficiencies of the prior art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to avoid prior art's weak point and provide a formula of book filter core and have water treatment facilities of this filter core, it is good to have a water purification effect, fast characteristics.

The purpose of the utility model is realized through the following technical measures.

The spiral flow channel is formed by winding more than one membrane in the radial direction, and the liquid flow direction is parallel to the central axis of the membrane structure.

Preferably, the roll-type filter element, the water inlet and the water outlet are respectively arranged at two ends of the membrane structure.

Preferably, after the membrane sheets forming the membrane structure are unfolded, one side parallel to the central axis of the membrane structure is defined as a side edge of the membrane sheet, and one side perpendicular to the central axis is defined as an end edge; the water inlet of the flow channel is arranged at the end edge of one side of the membrane, and the water outlet of the flow channel is arranged at the end of the other side of the membrane.

Preferably, in the above roll-type filter element, a part or all of the end edges of part of the membranes on the end face of the membrane structure are provided with water inlets.

Preferably, in the above roll-type filter element, a part or all of the end edges of part of the membrane sheets on the end face of the membrane structure are provided with water outlets.

Preferably, in the roll-type filter element, the membrane is a reverse osmosis membrane, a nanofiltration membrane, a cation exchange membrane, an anion exchange membrane or a bipolar membrane.

Preferably, in the roll-type filter element, the membrane sheet is rectangular after being unfolded, and the long side of the membrane sheet is used as the end edge of the membrane sheet or the short side of the membrane sheet is used as the end edge of the membrane sheet.

Preferably, in the roll-up filter element, the membrane is a bipolar membrane, and the plurality of bipolar membranes are oriented in the same direction.

Preferably, the roll-up filter element further comprises a diversion net, and at least one diversion net is arranged between the electrode and the bipolar membrane and between the bipolar membrane and the bipolar membrane.

Preferably, the roll-up filter element is further provided with at least one pair of electrode sets, each electrode set comprises at least one porous electrode, one electrode is assembled in the functional channel of the membrane structure, and the other electrode is sleeved outside the membrane structure.

Preferably, in the rolled filter element, the porous electrode is provided with a porous material; or a porous material and a current collector arranged in a stacked manner; or a current collector, a porous material and an ion exchange membrane which are arranged in a laminated manner are arranged; or a porous material and an ion exchange membrane arranged in a laminated manner.

The utility model also provides a water treatment facilities has foretell book formula filter core.

The utility model discloses a formula of book filter core and water treatment facilities who has this filter core is provided with the membrane structure that forms by the radial coiling of more than one diaphragm and convolutes the spiral helicine runner that forms by the diaphragm, and the liquid flow direction is on a parallel with the axis of membrane structure, can compromise water purification efficiency and water purification effect.

Drawings

The present invention will be further described with reference to the accompanying drawings, but the contents in the drawings do not constitute any limitation to the present invention.

Fig. 1 is a schematic structural diagram of an embodiment 1 of a rolled filter element of the present invention.

FIG. 2 is a schematic view of the section view "A-A" of FIG. 1 in a desalted state.

FIG. 3 is a schematic view of the section "A-A" of FIG. 1 in a regeneration state.

Fig. 4 is a schematic structural diagram of a porous electrode in an embodiment 4 of a rolled filter element according to the present invention.

In fig. 1 to 4, the following are included:

a first electrode 100, a second electrode 200,

Membrane 300, cation exchange membrane 310, first anion exchange membrane 320,

A current collector 130, a porous material 110, a second anion exchange membrane 120.

Detailed Description

The present invention will be further illustrated with reference to the following examples.

Reference herein to "deionization" is to the removal of ions from the liquid to be treated, including anions and cations in various valence states. In most cases, "deionization" has the same meaning as "desalination". In some cases, deionization is also referred to as demineralization.

Example 1.

A spiral filter element is composed of a membrane structure made up by radially winding more than one membrane and a spiral flow channel made up by winding said membrane, and features that the liquid flow direction is parallel to the central axis of said membrane structure. As shown in fig. 1, a situation is illustrated where the direction of the liquid flow is parallel to the central axis of the membrane structure, and the liquid enters from the end face of the membrane structure and exits from the end face below. Correspondingly, the water inlet and the water outlet of the roll-type filter element are respectively arranged at two ends of the membrane structure.

After the membrane forming the membrane structure is unfolded, one side parallel to the central axis of the membrane structure is defined as the side edge of the membrane, and the other side perpendicular to the central axis is defined as the end edge; the water inlet of the flow channel is arranged at the end edge of one side of the membrane, and the water outlet of the flow channel is arranged at the end of the other side of the membrane. Part or all of the end edges of the partial membrane of the end face of the membrane structure can be provided with water inlets. Part or all of the end edge of the partial membrane of the end face of the membrane structure can be provided with a water outlet. The specific opening position and the opening size can be flexibly set according to actual needs.

The membrane is rectangular after being unfolded, and the long side of the membrane can be used as the end edge of the membrane or the short side of the membrane can be used as the end edge of the membrane. If the membrane is square, any side can be used as the end or side.

The membrane can be a reverse osmosis membrane, a nanofiltration membrane, a cation exchange membrane, an anion exchange membrane or a bipolar membrane, and the like, and different membranes are adopted to realize different functions.

The bipolar membrane bipolar. The diversion net material comprises net materials such as polypropylene, nylon, polyester and the like, and the thickness of the diversion net material is 0.05-2 mm. And a flow channel is formed through the flow guide net, so that the roll type filter element can work accurately and effectively.

The filter element of the embodiment can lead in straight-in and straight-out liquid flow into the spiral wound flow channel, not only can utilize the length formed by the spiral flow channel, but also can consider the efficiency of water treatment.

Example 2.

A rolled filter element, the other features being the same as those of embodiment 1, except that: the membrane 300 is a bipolar membrane, and the plurality of bipolar membranes are oriented in the same direction. The bipolar membrane is adopted, so that the efficiency of water treatment can be improved.

Example 3.

A rolled filter element, the other features of which are the same as those of embodiment 1 or 2, except that: the electrode group at least comprises a porous electrode, each bipolar membrane consists of a cation exchange membrane and an anion exchange membrane which are attached together, and no flow channel exists between the cation exchange membrane and the anion exchange membrane which form the same bipolar membrane.

The pair of electrode groups may be composed of two porous electrodes, or may be composed of one porous electrode and one common electrode. Common electrodes such as metal electrodes, titanium electrodes with ruthenium-yttrium coatings, ruthenium-yttrium electrodes, carbon electrodes, graphite electrodes, etc.

Among them, the porous electrode may be composed of a porous material, or a porous material and a current collector laminated, or a current collector, a porous material, and an ion exchange membrane laminated in this order. The ion exchange membrane is an anion exchange membrane or a cation exchange membrane, and when the ion exchange membrane is contained, the ion exchange membrane in the porous electrode is close to the bipolar membrane. The cation exchange membrane or the anion exchange membrane in the porous electrode can be flexibly selected according to actual needs.

The porous material may be any electrically conductive material having a large specific surface, e.g. a specific surface of more than 100m²Conductive material per gram. In some embodiments, the porous material is a hydrophobic, electrically conductive material. The porous material has a porous structure with pore sizes between 0.5 and 50 nanometers. The porous material can be an electric conductor prepared from one or more of activated carbon, carbon black, carbon nanotubes, graphite, carbon fibers, carbon cloth, carbon aerogel, metal powder (such as nickel), metal oxide (such as ruthenium oxide) and conductive polymer. In one embodiment, the porous material is a sheet or plate structure made of activated carbon and having a thickness in the range of 100 to 5000 micrometers, preferably 200 to 2,500 micrometers, and the pore size of the activated carbon sheet structure is between 0.5 to 20 nanometers, preferably 1 to 10 nanometers.

The porous electrode can reduce the scaling risk of the roll type bipolar membrane filter element. Since the ion exchange membrane contains or is adsorbed with ion charge units, when the amount of ions at the porous electrode is insufficient to complete the desorption process, the excess charge on the electrode is buffered by releasing the ions in the ion exchange membrane to help complete the desorption process. In this way, the risk of fouling is greatly reduced.

The current collector is used to connect to a wire or power source, also referred to as a "current collector". The current collector is formed of one or more materials selected from the group consisting of metals, metal alloys, graphite, graphene, carbon nanotubes, and conductive plastics. The current collector may be in any suitable form such as a plate, mesh, foil or sheet. In some embodiments, the current collector may be made of a metal or metal alloy, suitable metals include titanium, platinum, iridium or rhodium, etc., preferably titanium, and suitable metal alloys may be stainless steel, etc. In other embodiments, the current collector may be made of a conductive carbon material, such as graphite, graphene, carbon nanotubes, and the like. In other embodiments, the current collector is made of a conductive plastic material, such as a polyolefin (e.g., polyethylene), and conductive carbon black or metal particles, etc., may be mixed therein. In some embodiments, the current collector is a sheet or plate-like structure and may have a thickness in the range of 50 micrometers to 5 millimeters. In some embodiments, the current collector and the porous electrode have substantially the same shape and/or size.

When the porosity and conductivity of the porous material are sufficient, the current collector may not be provided when the porous material itself functions as the current collector.

The rolled bipolar membrane filter element of the embodiment can be composed of a plurality of electrode groups, and when the rolled bipolar membrane filter element comprises a plurality of electrode groups, the electrode groups can be connected in series or in parallel or in series-parallel or in parallel-series and parallel-parallel series-parallel connection mode for flow passage connection. In the present specification, the terms "in series" and "in parallel" are defined in consideration of the flow direction of the flow path liquid flow output liquid. For example, if two electrode sets are connected in series, the product fluid from the flow channel of the previous electrode set enters the flow channel of the next electrode set. For another example, if two electrode sets are connected in parallel, it means that the flow channels of the two electrode sets receive the same liquid. The series set of electrodes is used to further remove ions from the liquid, while the parallel set of electrodes is used to increase the throughput of the device.

The technical solution of the present invention will be described below by taking the rolled bipolar membrane filter element shown in fig. 2 to 3 as an example.

As shown in fig. 1, the roll-type bipolar membrane filter cartridge comprises an electrode pair consisting of a pair of porous first electrodes 100 and a pair of porous second electrodes 200, wherein the first electrode 100 is located at the center position, the membrane 300 adopts a bipolar membrane, the bipolar membrane is radially wound on the first electrode 100 located at the center position to form a spiral membrane structure, and the second electrodes 200 are sleeved outside the membrane structure. The adjacent layers wound by the bipolar membranes of the membrane structure form a flow channel, and a layered structure is also formed between the electrode and the adjacent bipolar membranes.

In the present embodiment, the porous first electrode 100 is formed by laminating the current collector 130 and the porous material 110, and the porous first electrode 100 is a cathode film electrode. The porous second electrode 200 is formed by sequentially laminating a current collector 230 and a porous material 210, and the porous second electrode 200 is an anode film electrode. The porous electrode can be formed by laminating and clamping a current collector and a porous material together without using a binder; or may be fixed by thermal bonding or bonded by an adhesive.

The cation exchange membrane or the anion exchange membrane in the porous electrode can be flexibly selected according to actual needs.

The bipolar membrane consists of a cation exchange membrane 310 and a first anion exchange membrane 320 which are attached together, and the cation exchange membrane 310 and the first anion exchange membrane 320 which form the same bipolar membrane are clamped tightly without a binder; the cation exchange membrane 310 and the first anion exchange membrane 320 may be formed by thermal lamination. There is no flow channel between the cation exchange membrane 310 and the first anion exchange membrane 320, and a flow channel is formed between the bipolar membrane or between the bipolar membrane and the electrode. The bipolar membranes sold in the market can be used as the bipolar membranes in the scheme, and the details are not repeated.

In this embodiment, when viewed along the section "a-a" in fig. 1, the bipolar membranes between the porous first electrode 100 and the porous second electrode 200 are four layers, and the arrangement directions of the four layers of bipolar membranes are the same, which means that the orientation of the cation exchange membrane 310 of each layer of bipolar membrane is the same, and certainly, the orientation of the first anion exchange membrane 320 of each layer of bipolar membrane is also necessarily the same. It should be noted that the number of bipolar membranes in the cross section formed after the bipolar membrane is wound is not limited to four in this embodiment, and the number of bipolar membranes in the cross section can be flexibly set according to actual needs, and the number of bipolar membranes in the common electrode pair is 1-50, or even more.

The desalting process of the rolled bipolar membrane filter core is shown in figure 2. When desalination is carried out for a while, reverse-polarity regeneration is required to release ions in water adsorbed on the bipolar membrane, as shown in FIG. 3.

The filter element makes full use of the membrane area of the bipolar membrane, and the electrolytic ion exchange mode greatly improves the speed and efficiency of ion exchange. Gas can not be generated in the polar water, and scaling phenomenon can not be caused. Therefore, the problems of gas generation and scaling caused by hydrolysis of the polar water in the prior art can be solved, the desalination rate can be improved, and the method has the characteristics of high water production rate and less water resource waste.

Example 4.

A rolled filter element, the other features being the same as those of embodiment 1, except that: other features are the same as those of embodiment 3, except that in this embodiment: as shown in fig. 4, the porous first electrode 100 is formed by stacking a current collector 130, a porous material 110, and a second anion exchange membrane 120 in this order, and the porous first electrode 100 is a cathode membrane electrode; the porous second electrode 200 is also formed by stacking a current collector, a porous material, and a cation exchange membrane in this order, and the porous second electrode 200 is an anode membrane electrode. The porous electrode can be formed by overlapping and clamping a current collector, a porous material and an ion exchange membrane together without using a binder; or may be fixed by thermal bonding or bonded by an adhesive.

Experiments show that the whole desalting efficiency of the electrodeionization device adopting the porous electrode can be improved by more than 10% compared with that of the electrodeionization device adopting the common electrode, and the desalting efficiency is improved by a higher degree than that of the structure in the embodiment 1. This is because the porous electrode can adsorb ions of raw water, and this adsorption efficiency is higher than the ion exchange efficiency of the bipolar membrane. It can be seen that the electrodeionization apparatus of this example using porous electrodes is excellent in overall performance.

The filter core of this embodiment can compromise desalination effect and desalination rate, and the desalination is effectual, and is fast.

Example 5.

A water treatment device having a rolled filter element according to any one of embodiments 1 to 5, which can be used for industrial or domestic water treatment. Examples of uses of industrial water treatment facilities mentioned herein include, but are not limited to, industrial sewage treatment, municipal sewage treatment, seawater desalination, brine treatment, river and lake water treatment, cheese whey demineralization, and the like. The industrial water treatment apparatus includes, in addition to the roll-type cartridge of the present invention embodiment, one or more of, for example, a flocculation and/or coagulation unit, an advanced oxidation unit, an adsorption unit, an electrolysis unit, a membrane separation unit (including one or more of microfiltration, ultrafiltration, nanofiltration and reverse osmosis).

The utility model discloses domestic water treatment facilities, except the utility model discloses a formula of book filter core, pipeline, power supply unit are rolled up to the formula of book, generally still include for example the ultrafiltration, receive and strain, in active carbon adsorption unit, the ultraviolet sterilization unit one or more.

This water treatment facilities, its filter core can compromise desalination efficiency and time, can improve the desalination, and system water is fast.

The water treatment equipment of the embodiment has the advantages that the length of the flow channel is prolonged by the filter element, so that the flow of liquid desalting in the flow channel is increased, the desalting efficiency is greatly improved, and the desalting efficiency of high-concentration brine can be realized under the condition that the membrane area and the volume of the filter element are not increased.

It should be finally noted that the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A filter cartridge, characterized in that: the device is provided with a membrane structure formed by radially winding more than one membrane and a spiral flow channel formed by winding the membranes, and the liquid flow direction is parallel to the central axis of the membrane structure;

the membrane is a bipolar membrane, and the orientation of the bipolar membranes is the same.

2. The filter cartridge of claim 1, wherein: the water inlet and the water outlet are respectively arranged at two ends of the membrane structure.

3. The filter cartridge of claim 2, wherein: after the membrane forming the membrane structure is unfolded, one side parallel to the central axis of the membrane structure is defined as the side edge of the membrane, and the other side perpendicular to the central axis is defined as the end edge; the water inlet of the flow channel is arranged at the end edge of one side of the membrane, and the water outlet of the flow channel is arranged at the end of the other side of the membrane.

4. A filter cartridge as recited in claim 3, wherein: the partial or all end edges of the partial membranes on the end surface of the membrane structure are provided with water inlets.

5. A filter cartridge as recited in claim 3, wherein: the partial or all end edges of the partial membrane of the end face of the membrane structure are provided with water outlets.

6. The filter cartridge of claim 1, wherein: the membrane is a reverse osmosis membrane, a nanofiltration membrane, a cation exchange membrane, an anion exchange membrane or a bipolar membrane.

7. The filter cartridge of claim 1, wherein: the membrane is rectangular after being unfolded, and the long side of the membrane is used as the end edge of the membrane or the short side of the membrane is used as the end edge of the membrane.

8. The filter cartridge of claim 1, wherein: the bipolar membrane bipolar.

9. A filter cartridge as claimed in any one of claims 1 to 8, wherein: at least one pair of electrode groups is also arranged, the electrode group at least comprises a porous electrode, one electrode is assembled in the functional channel of the membrane structure, and the other electrode is sleeved outside the membrane structure.

10. The filter cartridge of claim 9, wherein: the porous electrode is provided with a porous material; or a porous material and a current collector arranged in a stacked manner; or a current collector, a porous material and an ion exchange membrane which are arranged in a laminated manner are arranged; or a porous material and an ion exchange membrane arranged in a laminated manner.

11. A water treatment apparatus characterized by: having a filter insert according to any one of claims 1-10.