A super large seawater electrochemical suspended filtration device and filtration method

Abstract

The application discloses a kind of super large seawater electrochemical suspension filter device and filtering method, the filtering device includes: first filter layer, electrochemical catalytic reaction layer, second filter layer, filter spherical support, seawater filtering output, buoyancy air bag, filter base, steel wire rope, fixed anchor;The second filter layer is connected with the filter spherical support;The buoyancy air bag, filter base are respectively arranged at the outside of the first filter layer;One end of the steel wire rope is connected with the filter base, and the other end is connected with the fixed anchor;The device uses electrochemical filtering method, which perfectly combines filtering physical material with electrochemistry, not only can quickly adsorb and coalesce automatic removal of sundry suspended matters and large-particle colloidal organic pollutants in seawater, but also can quickly decompose hydrogen sulfide H2S in water, eliminate malodor, while rapidly kill bacteria, viruses and microcorroding organisms in seawater, can effectively improve filtering efficiency and reduce cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of seawater filtration, and more particularly to an ultra-large seawater electrochemical suspended filtration device and a filtration method. BACKGROUND

[0002] In recent years, seawater resource utilization is increasingly widely applied in fields such as coastal ship defense industry, agriculture and aquaculture, and therefore, purification measures are needed for seawater. For example, seawater is applied to heat exchange cooling of coastal nuclear power plants (steel plants), and because the amount of seawater cooling equipment is too large (several hundred thousand cubic meters of seawater are needed per day for a single plant), the simplest steel mesh is currently used to intercept relatively large shell colloids and suspended substances on the sea surface in seawater, but these substances will be continuously adsorbed and bonded to block the mesh holes over time, flow rate and water temperature, and manual or robotic physical cleaning is very difficult. In addition, seawater also contains sulfides, bacteria, viruses and micro-corrosion organisms, and in particular, a large amount of silt is contained in shallow seas, and if a conventional physical and chemical water purification method is used, the workload is too large, the cost of chemicals is high, and the environment is also polluted. Therefore, if the silt, suspended substances and harmful substances such as sulfides, bacteria and viruses remaining in seawater cannot be removed in time, it will directly affect the water quality requirements of coastal enterprises for seawater use, hindering the development of enterprises.

[0003] In the prior art, patent number CN107694190A discloses a seawater filtration device, a seawater filtration system and a seawater filtration method, and patent number CN117800418A discloses a seawater filtration method and device. The common points of the above two patents are that the filter mesh uses mesh gaps in the mesh structure to intercept silt and algal organic suspended substances in seawater (such as polyester diaphragm, nylon diaphragm, ceramic porous diaphragm, PVA polymer film, etc.), and the second is to overcome the problem of filter mesh hole blockage by using mechanical power to drive the filter mesh body to rotate, roll or auxiliary pipe suction to remove the accumulated substances on the filter mesh, thereby prolonging the working time of the filter mesh. From a technical point of view, the above-mentioned patents have certain improvements and improvements compared with the simple interception and filtration of suspended substances in seawater by steel mesh, but from the actual application point of view, the problem has not been fundamentally solved. The physical filtration method has low filtration efficiency and short service life, and the water output and filtration efficiency decrease to less than 50% within 3 months, and completely fail within 5 months. In addition, the seawater sterilization and algae and micro-corrosion organisms have no effect on pollutants, and cannot meet the demand of coastal industrial and agricultural users and biological breeding users for qualified seawater.

[0004] Therefore, how to provide an electrochemical suspended filtration device and apply it to seawater filtration is a problem that needs to be solved by those skilled in the art. SUMMARY

[0005] Therefore, the application provides a super-large seawater electrochemical suspended filtering device and a filtering method.

[0006] In order to achieve the above-mentioned purpose, the application adopts the following technical scheme:

[0007] A super-large seawater electrochemical suspended filtering device, the filtering device comprising: a first filtering layer (1), an electrochemical catalytic reaction layer (2), a second filtering layer (3), a filter spherical support (4), a seawater filtering output port (5), a buoyancy air bag (6), a filter base (7), a steel wire rope (8), a fixed anchor (9).

[0008] The second filtering layer (3) is connected with the filter spherical support (4); the buoyancy air bag (6) and the filter base (7) are respectively arranged outside the first filtering layer (1); one end (8) of the steel wire rope is connected with the filter base (7), and the other end is connected with the fixed anchor (9).

[0009] Further, the shape of the filtering device is spherical.

[0010] Further, the material of the first filtering layer (1) is selected from any one of stainless steel 316L, nickel, nickel alloy or graphene.

[0011] Further, the material of the first filtering layer (1) is selected from any one of titanium-based ruthenium iridium noble metal coating oxide, graphene, nickel-based coating or diamond.

[0012] Further, the material of the second filtering layer (3) is selected from any one of titanium-based ruthenium iridium noble metal coating oxide, graphene, nickel-based coating or diamond.

[0013] Further, the material of the second filtering layer (3) is selected from titanium-based ruthenium iridium noble metal coating oxide.

[0014] Further, the first filtering layer (1) is provided as a - electrode; and the second filtering layer (3) is provided as a + electrode.

[0015] Further, the first filtering layer (1) and the second filtering layer (3) are in a mesh structure of a hole plate.

[0016] Further, the thickness of the hole plate is 1.5-2mm; the pore length of the hole plate is 8-14mm; and the pore width of the hole plate is 0.3-1.2mm.

[0017] Further, the mesh shape of the mesh structure is any one of a rhombus, a circle, a rectangle or a polygon.

[0018] Further, the mesh shape of the mesh structure is a rhombus.

[0019] Further, the material of the filter spherical support (4) is selected from any one of aluminum alloy 7075, stainless steel 316L, stainless steel 2205 or palladium alloy steel.

[0020] Further, the material of the filter spherical support (4) is selected from aluminum alloy 7075.

[0021] As the same inventive concept as the above technical solution, the application also claims a seawater filtering method using the above device, comprising the following steps:

[0022] (1) The above ultra-large seawater electrochemical suspended filtering device is suspended in the sea through the filter base, steel wire and fixing anchor, and the filtering device is fixed at a suitable position by adjusting the air pressure and volume of the buoyancy air bag;

[0023] (2) When the seawater stably flows through the suspended filtering device, the power supply is started, and the first filter layer and the second filter layer and the electrochemical catalytic reaction layer therebetween are under the action of electric field force, the first filter layer can quickly adsorb and remove the suspended matter in the seawater, the second filter layer performs electrochemical oxidation reaction, directly oxidizes and degrades and removes the organic pollutants in the seawater, and at the same time, the positive and negative ions in the seawater in the catalytic reaction layer move quickly, generate electrochemical indirect reaction to generate new sulfur-removing sterilization substances, kill bacteria, viruses and other substances in the seawater, and obtain purified seawater;

[0024] (3) The purified seawater in step (2) is output through the seawater filtering output port in the suspended filtering device, then connected to the seawater output pump inlet through the connecting hose, and finally delivered to the enterprise user through the seawater output pump.

[0025] Through the above technical solution, compared with the prior art, the application discloses an ultra-large seawater electrochemical suspended filtering device and a filtering method, which has the beneficial effects of:

[0026] (1) The traditional physical filtering technology is to intercept sundry suspended matters through the pore gap of the material, the material is easy to scale and difficult to clean manually, and at the same time, the filtering water volume is small, the efficiency is low, and the sulfide bacteria and other pollutants in the seawater cannot be removed; and the application firstly adopts an electrochemical filtering method, which perfectly combines the physical filtering material with the electrochemical function (i.e. the first and second filter layers are not only physical filtering materials but also electrochemical filtering adsorption and oxidation function conductive materials), through the electrode layer electro-adsorption catalytic reaction principle, all charged sundry suspended matters and large-particle colloidal organic pollutants in the seawater are automatically removed by adsorption and coalescence without manual intervention, the filtering efficiency is improved by several tens of times, and the purified seawater has the functions of sulfur removal, scale removal and sterilization;

[0027] (2) the present application first proposes a design scheme of adopting spherical structure filter, since the specific surface area of the spherical body is maximum, seawater enters from the outer layer of the spherical body, seawater purification outlet is designed in the center of the filter body, no matter which site seawater enters on the surface of the spherical body, the flow velocity of the filtering and electrochemical reaction process to the center outlet is equal, that is, the treatment effect is consistent under the condition that other conditions are unchanged, so that it is proved that the filtering efficiency is the highest and the best, and the spherical filter structure is simple, the seawater filtration and purification treatment capacity is large, the daily treatment capacity of a single unit is as high as hundreds of thousands of cubic meters, and the treatment cost per ton of water is estimated to be a few cents of RMB, which is more than 100 times lower than the cost of conventional seawater purification method;

[0028] (3) due to the influence of seawater tide, water level, sea wave and other environmental conditions, the difficulty of seawater filtration and purification increases; in the prior art, only the steel metal filter screen is used to fixedly intercept shells, sundries and seaweed in seawater to play a role in filtering and purifying seawater, but it can only be applied in shallow sea, and the treatment effect is poor, the water quality is unqualified due to much silt; and the present application first proposes the design concept of suspended spherical filter, since the suspended filter works in the sea and is not affected by the environmental conditions of seabed silt and sea surface tide and sea wave, and the present application also adopts mature buoyancy technology of the suspended air bag, the depth of the filter in seawater can be adjusted or stabilized by adjusting the buoyancy of the air bag, so that intelligent control is achieved.

[0029] (4) the suspended filter device in the present application can be intelligently designed, and remote operation, remote maintenance and data transmission unattended are realized by using internet 5G and Beidou positioning communication technology; at the same time, the working position, working depth and working state of the filter are monitored remotely for 24 hours, so that automatic intelligent management of the super large seawater suspended filter is realized. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the provided drawings.

[0031] Figure 1 The drawing is a structural schematic diagram of the super large seawater electrochemical suspended filter device provided by the present application;

[0032] Figure 2 The drawing is a schematic diagram of the mesh size of the positive and negative electrodes of the first and second filter layers provided by the present application;

[0033] Figure 3 The drawing is a process flow schematic diagram of the super large seawater electrochemical suspended filter provided by the present application;

[0034] The components include: 1. First filter layer; 2. Electrochemical catalytic reaction layer; 3. Second filter layer; 4. Filter spherical support; 5. Seawater filter outlet; 6. Buoyancy airbag; 7. Filter base; 8. Steel wire rope; 9. Fixing anchor; 10. Perforated plate substrate; 11. Mesh; 12. Hose; and 13. Seawater external pump. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Example 1

[0037] like Figures 1-2 As shown, an ultra-large seawater electrochemical suspension filtration device is provided. The filtration device includes: a first filter layer (1), an electrochemical catalytic reaction layer (2), a second filter layer (3), a filter spherical support (4), a seawater filtration outlet (5), a buoyancy airbag (6), a filter base (7), a steel wire rope (8), and a fixed anchor (9). The second filter layer (3) is connected to the filter spherical support (4). The buoyancy airbag (6) and the filter base (7) are respectively located outside the first filter layer (1). One end (8) of the steel wire rope is connected to the filter base (7), and the other end is connected to the fixed anchor (9).

[0038] Working principle: The ultra-large seawater electrochemical suspension filter is fixed and suspended in the sea by a filter base, steel wire rope and fixed anchor. The suspension position of the filter can be stabilized by adjusting the air pressure and volume of the buoyancy airbag. The suspension filter is equipped with a filter ball support, which can strengthen the structure of the ultra-large suspension filter and prevent deformation caused by tidal waves.

[0039] When the seawater flows evenly through the suspended filter device, the power is turned on, and the first filter layer (- electrode) and the second filter layer (+ electrode) are affected by the electric field force. The first filter layer (- electrode) can quickly adsorb and remove shells, large-particle colloids and their suspended matters. The second filter layer (+ electrode) can directly oxidize and degrade the organic pollutants. Meanwhile, in the electrochemical catalytic reaction layer and between the first and second filter layers, the high-mineralization multi-element seawater is used as the electrolyte raw material (the content of sodium and chlorine inorganic ions is as high as 30000 mg / L), and the positive and negative ions move quickly. In the migration process, a series of electrochemical reactions occur, generating high-concentration active radicals and new sterilization substances such as hydroxyl radical.OH, atomic oxygen O, hypochlorous acid HCIO and hydrogen peroxide H2O2. After mixing with seawater, these new substances can quickly decompose hydrogen sulfide H2S in water, eliminate malodor, and quickly kill bacteria, viruses and microorganisms in seawater, so as to obtain purified seawater. The purified seawater is output through the seawater filtering output port in the suspended filter device, connected to the seawater output pump inlet through the connecting hose, and finally pressurized by the seawater output pump and sent to the enterprise user.

[0040] Example 2

[0041] As shown in Figure 3 , a seawater filtering method includes the following steps:

[0042] (1) The above-mentioned super-large seawater electrochemical suspended filter device is fixed in the sea through the filter base, steel wire and fixed anchor. The filter device is fixed at a suitable position by adjusting the air pressure and volume of the buoyancy air bag;

[0043] (2) When the seawater stably flows through the suspended filter device, the power is started, and the first filter layer and the second filter layer and the electrochemical catalytic reaction layer therebetween are affected by the electric field force. The first filter layer can quickly adsorb and remove the suspended matters in seawater, and the second filter layer performs electrochemical oxidation reaction to directly oxidize and degrade the organic pollutants in seawater. Meanwhile, the positive and negative ions in the catalytic reaction layer move quickly, generate new sterilization substances by electrochemical indirect reaction, kill bacteria, viruses and other substances in seawater, and obtain purified seawater;

[0044] (3) The seawater purified in step (2) is output through the seawater filtering output port in the suspended filter device, connected to the seawater output pump inlet through the connecting hose, and finally delivered to the enterprise user by the seawater output pump.

[0045] The various embodiments described in this specification are implemented in a progressive manner, each embodiment focusing on the differences from other embodiments, and the same or similar parts between embodiments can be mutually referred to. For the apparatus disclosed by the embodiments, since it corresponds to the method disclosed by the embodiments, the description is relatively simple, and the relevant parts can be referred to the description of the method part.

[0046] The above description of disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to the embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An ultra-large seawater electrochemical suspended filtration device, characterized in that, The filter device comprises a first filter layer (1), an electrochemical catalytic reaction layer (2), a second filter layer (3), a filter spherical support (4), a seawater filtering output port (5), a buoyancy air bag (6), a filter base (7), a steel wire rope (8), and a fixed anchor (9). The second filter layer (3) is connected with the filter spherical support (4); the buoyancy air bag (6) and the filter base (7) are respectively arranged outside the first filter layer (1); one end of the steel wire rope (8) is connected with the filter base (7), and the other end is connected with the fixed anchor (9); the filter device is in a spherical shape; the first filter layer (1) is a negative electrode; the second filter layer (3) is a positive electrode; and the electrochemical catalytic reaction layer (2) is located between the first filter layer (1) and the second filter layer (3).

2. The ultra-large seawater electrochemical suspended filtration device according to claim 1, characterized in that, The material of the first filter layer (1) is selected from any one of stainless steel 316L, nickel, nickel alloy, or graphene.

3. The super-large seawater electrochemical suspended filtration device according to claim 1, characterized in that, The material of the second filter layer (3) is selected from any one of a titanium-based ruthenium iridium noble metal coating oxide, graphene, a nickel-based coating, or diamond.

4. The ultra-large seawater electrochemical suspended filter device according to claim 1, characterized in that, The first filter layer (1) and the second filter layer (3) are in a mesh structure.

5. An ultra-large seawater electrochemical suspended filtration device according to claim 4, characterized in that, The thickness of the mesh plate is 1.5-2 mm; the pore length of the mesh plate is 8-14 mm; and the pore width of the mesh plate is 0.3-1.2 mm.

6. An ultra-large seawater electrochemical suspended filtration device according to claim 4, characterized in that, The mesh shape of the mesh structure is any one of a rhombus, a circle, a rectangle, or a polygon.

7. The ultra-large seawater electrochemical suspended filter device according to claim 1, characterized in that, The material of the filter spherical support (4) is selected from any one of aluminum alloy 7075, stainless steel 316L, stainless steel 2205, or palladium alloy steel.

8. A method for filtering seawater using the super-large seawater electrochemical suspended filter device according to claim 1, characterized in that, The method comprises the following steps: (1) The ultra-large seawater electrochemical suspended filter device is fixedly suspended in the sea through the filter base, the steel wire rope, and the fixed anchor, and the filter device is fixed at a suitable position by adjusting the air pressure and volume of the buoyancy air bag; (2) When seawater stably flows through the suspended filter device, the power supply is started, the first filter layer and the second filter layer and the electrochemical catalytic reaction layer therebetween are subjected to the action of an electric field force, the first filter layer can quickly adsorb and remove suspended matters in seawater, the second filter layer performs an electrochemical oxidation reaction, directly oxidizes and degrades, and removes organic pollutants in seawater, meanwhile, positive and negative ions in the catalytic reaction layer quickly migrate in seawater, an electrochemical indirect reaction is generated to generate a new sulfur-removing sterilization substance, bacteria, viruses, and other substances in seawater are killed, and purified seawater is obtained; (3) The purified seawater obtained in step (2) is output through the seawater filtering output port in the suspended filter device, is output to the seawater output pump inlet through a connecting hose, and is finally delivered to an enterprise user through the seawater output pump.

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