Fluidized bed device based on three-dimensional electrocatalytic oxidation

Abstract

The utility model provides a fluidized bed device based on three-dimensional electrocatalytic oxidation. The fluidized bed device comprises a fluidized bed body, a water inlet pipe arranged at the bottom of the fluidized bed and a water outlet pipe arranged at the top of the fluidized bed, an aeration pipe is arranged above the water inlet pipe, a reaction zone filled with an iron-carbon particle electrode material is arranged above the aeration pipe, and a cathode plate and an anode plate are arranged in the reaction zone; and when wastewater enters the fluidized bed through the water inlet pipe, the iron-carbon particle electrode material is in a fluidized state in the reaction area through aeration introduced by the aeration pipe. According to the utility model, the micron-sized iron-carbon material is used as the particle electrode material of the reactor, the micron-sized particle electrode material is in a fluidized state between the electrocatalytic cathode and the electrocatalytic anode, the particle electrode can be regarded as a microelectrode capable of driving an oxidation-reduction reaction, and the particle electrodes are in an open circuit state; and short circuit is avoided while the current utilization efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of wastewater treatment, and in particular to a fluidized bed device based on three-dimensional electrocatalytic oxidation. Background Art

[0002] Although traditional physical and chemical methods, biochemical methods, adsorption methods and other methods have certain treatment effects on most industrial wastewaters, the organic matter in high-salt and difficult-to-degrade industrial wastewater generally has a relatively stable molecular structure, and most of them are biologically toxic and difficult to degrade. It is difficult to effectively treat this type of wastewater using only traditional process combinations.

[0003] As a new type of advanced oxidation technology, the granular materials filled between the cathode and anode are connected in series to form countless microelectrodes under the action of the electric field, which greatly increases the electrode surface area and improves the current utilization efficiency without expanding the electrolytic cell. It shows advantages and application potential in the treatment of high-salinity and difficult-to-degrade wastewater. However, the three-dimensional electrocatalytic reaction efficiency of existing three-dimensional electrocatalytic oxidation equipment is low. Utility Model Content

[0004] In view of the above problems, the present application is proposed to provide a fluidized bed device based on three-dimensional electrocatalytic oxidation that overcomes the above problems or at least partially solves the above problems, comprising:

[0005] A fluidized bed device based on three-dimensional electrocatalytic oxidation, comprising a fluidized bed body, a water inlet pipe arranged at the bottom of the fluidized bed, and a water outlet pipe arranged at the top of the fluidized bed;

[0006] An aeration pipe is arranged above the water inlet pipe, and a reaction zone for filling iron-carbon particle electrode material is arranged above the aeration pipe, and a cathode plate and an anode plate are arranged in the reaction zone;

[0007] When wastewater enters the fluidized bed through the water inlet pipe, the aeration introduced through the aeration pipe causes the iron-carbon particle electrode material to be in a fluidized state in the reaction zone.

[0008] Preferably, the water outlet end of the water outlet pipe is connected to a magnetic separation device.

[0009] Preferably, the magnetic separation device is provided with an electrode material reflux port and a drain port, the electrode material reflux port is connected to the fluidized bed via a reflux pipe, and the drain port is connected to a wastewater collection device.

[0010] Preferably, the discharge end of the reflux pipe is arranged between the aeration pipe and the reaction zone.

[0011] Preferably, the anode plate is a Ti4O7 modified electrode.

[0012] Preferably, the cathode plate is a stainless steel electrode.

[0013] Preferably, a plurality of aeration holes are evenly distributed on the aeration pipe.

[0014] Preferably, the particle size of the iron-carbon particle electrode material is 5 to 20 um.

[0015] Preferably, it also includes a photovoltaic power generation device, and the photovoltaic power generation device is electrically connected to the fluidized bed body.

[0016] Preferably, the photovoltaic power generation device comprises a distributed photovoltaic power generation panel and a power controller, the distributed photovoltaic power generation panel and the power controller are electrically connected, and the power controller is respectively connected to the anode plate and the cathode plate.

[0017] This application has the following advantages:

[0018] In the embodiments of the present application, relative to the problem of low efficiency of three-dimensional electrocatalytic oxidation in the prior art, the present application provides a solution that an aeration pipe makes the iron-carbon particle electrode material in the reaction zone in a fluidized state, specifically: comprising a fluidized bed body, a water inlet pipe arranged at the bottom of the fluidized bed and a water outlet pipe arranged at the top of the fluidized bed; an aeration pipe is arranged above the water inlet pipe, and a reaction zone for filling the iron-carbon particle electrode material is arranged above the aeration pipe, and a cathode plate and an anode plate are arranged in the reaction zone; when wastewater enters the fluidized bed through the water inlet pipe, the aeration introduced by the aeration pipe makes the iron-carbon particle electrode material in the reaction zone in a fluidized state. The utility model uses micron-sized iron-carbon material as the particle electrode material of the reactor, and the micron-sized particle electrode material is in a fluidized state between the electrocatalytic anode and cathode. The particle electrode can be regarded as a microelectrode capable of driving the redox reaction, and the particle electrodes are in an open circuit state, which improves the current utilization efficiency while avoiding short circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the description of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0020] Figure 1 It is a schematic structural diagram of a fluidized bed device based on three-dimensional electrocatalytic oxidation provided in one embodiment of the present application.

[0021] The reference numerals in the drawings of the specification are as follows:

[0022] 1. Water inlet pipe; 2. Aeration pipe; 3. Reaction zone; 4. Anode plate; 5. Cathode plate; 6. Water outlet pipe; 7. Power controller; 8. Photovoltaic power generation panel; 9. Reflux pipe; 10. Magnetic separation equipment; 11. Drainage outlet. DETAILED DESCRIPTION

[0023] In order to make the objects, features and advantages of the present application more obvious and understandable, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0024] The inventors analyzed the prior art and found that currently, most three-dimensional electrocatalytic oxidation devices on the market use activated carbon and other materials as particle electrode materials. When activated carbon and other materials are used as particle electrodes, after the activated carbon is filled between the anode and cathode plates, the activated carbon will pile up on each other, and the generation of a large amount of short-circuit current cannot be avoided, thereby greatly reducing the efficiency of the three-dimensional electrocatalytic reaction.

[0025] Reference Figure 1 , showing a fluidized bed device based on three-dimensional electrocatalytic oxidation provided in an embodiment of the present application, comprising a fluidized bed body, a water inlet pipe 1 arranged at the bottom of the fluidized bed, and a water outlet pipe 6 arranged at the top of the fluidized bed;

[0026] An aeration pipe 2 is provided above the water inlet pipe 1, and a reaction zone 3 for filling iron-carbon particle electrode materials is provided above the aeration pipe 2, and a cathode plate 5 and an anode plate 4 are provided in the reaction zone 3;

[0027] When wastewater enters the fluidized bed through the water inlet pipe 1 , the aeration introduced by the aeration pipe 2 causes the iron-carbon particle electrode material to be in a fluidized state in the reaction zone 3 .

[0028] In the embodiment of the present application, relative to the problem of low efficiency of three-dimensional electrocatalytic oxidation in the prior art, the present application provides a solution that an aeration pipe makes the iron-carbon particle electrode material in the reaction zone in a fluidized state, specifically: comprising a fluidized bed body, a water inlet pipe 1 arranged at the bottom of the fluidized bed and a water outlet pipe 6 arranged at the top of the fluidized bed; an aeration pipe 2 is arranged above the water inlet pipe 1, a reaction zone 3 for filling the iron-carbon particle electrode material is arranged above the aeration pipe 2, and a cathode plate 5 and an anode plate 4 are arranged in the reaction zone 3; when wastewater enters the fluidized bed through the water inlet pipe 1, the aeration introduced by the aeration pipe 2 makes the iron-carbon particle electrode material in the reaction zone 3 in a fluidized state. The utility model uses micron-sized iron-carbon material as the particle electrode material of the reactor, and the micron-sized particle electrode material is in a fluidized state between the electrocatalytic cathode and cathode. The particle electrode can be regarded as a microelectrode capable of driving the redox reaction, and the particle electrodes are in an open circuit state, which improves the current utilization efficiency while avoiding short circuit.

[0029] Next, a fluidized bed device based on three-dimensional electrocatalytic oxidation in each exemplary embodiment of the present application will be further described.

[0030] It should be noted that the wastewater to be treated is pumped into the fluidized bed reactor of three-dimensional electrocatalytic oxidation through a water pump, and micron-sized iron-carbon particle electrode materials are arranged between the electrode plates of the three-dimensional electrocatalytic oxidation. The iron-carbon particle electrode materials in the fluidized bed of the three-dimensional electrocatalytic oxidation are in a fluidized state under the aeration conditions of the aeration pipe 2. Hydroxyl radicals (·OH) are generated by the reaction of the electrocatalytic oxidation anode plate 4, and ·OH mineralizes and degrades organic matter in the wastewater. The particle electrodes are in an open circuit state, which improves the current utilization efficiency while avoiding short circuits, and the electrocatalytic efficiency is increased by more than 50% compared with traditional equipment. The use of micron-sized iron-carbon materials instead of traditional granular activated carbon as the particle electrode material of the reactor solves the problem of a large amount of short-circuit current generated by the traditional three-dimensional electrocatalytic oxidation reactor and low efficiency of the three-dimensional electrocatalytic reaction.

[0031] Furthermore, the iron-carbon particle electrode material is fluidized in the three-dimensional electrocatalytic oxidation reaction zone 3 by aeration, thereby improving the reaction efficiency. Meanwhile, the aeration disturbance can effectively avoid scaling of the positive and negative electrode plates of the reaction device, thereby extending the service life of the electrode plates and the power conversion efficiency.

[0032] In this embodiment, the outlet end of the water outlet pipe 6 is connected to the magnetic separation device 10. Specifically, a small amount of lost particle electrode material reagent can be magnetically separated by the magnetic separation device 10, so as to facilitate the subsequent recycling of the particle electrode material.

[0033] In this embodiment, the magnetic separation device 10 is provided with an electrode material reflux port and a drain port 11 . The electrode material reflux port is connected to the fluidized bed via a reflux pipe, and the drain port 11 is connected to a wastewater collection device.

[0034] In a specific implementation, the discharge end of the reflux pipe 9 is arranged between the aeration pipe 2 and the reaction zone 3 .

[0035] It should be noted that the particle electrode material after magnetic separation flows back to the electrocatalytic reaction zone 3 for magnetic recovery separation to achieve the recycling of the particle electrode material. The iron-carbon particle electrode material has good electrical conductivity and magnetism. The lost iron-carbon particle electrode material agent can be magnetically separated by a magnetic separation device. The particle electrode material after magnetic separation flows back to the electrocatalytic reaction tank to achieve the recycling of the particle electrode material. The recovery rate of the particle electrode material is >99.5%.

[0036] In this embodiment, the anode plate 4 is a Ti4O7 modified electrode.

[0037] In a specific implementation, the dimensions of the anode plate 4 are 800 mm in length, 500 mm in width and 20 mm in thickness.

[0038] In this embodiment, the cathode plate 5 is a stainless steel electrode.

[0039] In a specific implementation, the dimensions of the cathode plate 5 are 800 mm×500 mm×20 mm in length, width and thickness.

[0040] In this embodiment, a plurality of aeration holes are evenly distributed on the aeration tube 2 .

[0041] In a specific implementation, the aeration tube 2 adopts a perforated aeration method, and 10 mm aeration holes are evenly distributed on the aeration tube 2 .

[0042] In this embodiment, the particle size of the iron-carbon particle electrode material is 5-20 um.

[0043] In this embodiment, a photovoltaic power generation device is also included, and the photovoltaic power generation device is electrically connected to the fluidized bed body. Specifically, the photovoltaic power generation device converts solar energy into electrical energy, and the electrical energy is regulated by the power controller 7 and then transmitted to the fluidized bed body through electrical conductors.

[0044] In this embodiment, the photovoltaic power generation device includes a distributed photovoltaic power generation panel 8 and a power controller 7. The distributed photovoltaic power generation panel 8 and the power controller 7 are electrically connected, and the power controller 7 is connected to the anode plate 4 and the cathode plate 5 respectively.

[0045] It should be noted that the power controller 7 converts and utilizes the electric energy of the photovoltaic panel 8, which is more energy-saving and environmentally friendly.

[0046] Working principle:

[0047] The wastewater to be treated is pumped into the reaction zone 3 of the fluidized bed body through the sewage inlet pipe 1, and the fluidized bed aeration pipe 2 is opened. Under the aeration condition, the iron-carbon particle electrode material in the fluidized bed of three-dimensional electrocatalytic oxidation is in a fluidized state in the particle electrode material reaction zone 3. Hydroxyl radicals are generated by the reaction of the anode plate 4 to mineralize and degrade organic matter. The power controller 7 converts the electric energy of the photovoltaic panel 8 to achieve efficient use of solar energy for electric energy. A small amount of lost micron-sized particle electrode material enters the particle electrode material magnetic separation device 10 with the water flow through the outlet pipe 6 of the electrocatalytic oxidation fluidized bed for magnetic recovery and separation. The particle electrode after magnetic recovery and separation is pumped into the reaction zone 3 of the fluidized bed of three-dimensional electrocatalytic oxidation through the particle reflux pipe 9 to achieve the recycling of the particle electrode material. The wastewater after magnetic separation is discharged through the drain 11.

[0048] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present application.

[0049] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0050] The above is a detailed introduction to a fluidized bed device based on three-dimensional electrocatalytic oxidation provided by the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A fluidized bed device based on three-dimensional electrocatalytic oxidation, characterized in that: It comprises a fluidized bed body, a water inlet pipe arranged at the bottom of the fluidized bed and a water outlet pipe arranged at the top of the fluidized bed; An aeration pipe is arranged above the water inlet pipe, and a reaction zone for filling iron-carbon particle electrode material is arranged above the aeration pipe, and a cathode plate and an anode plate are arranged in the reaction zone; When wastewater enters the fluidized bed through the water inlet pipe, the aeration introduced through the aeration pipe causes the iron-carbon particle electrode material to be in a fluidized state in the reaction zone.

2. The fluidized bed device based on three-dimensional electrocatalytic oxidation according to claim 1, characterized in that: The water outlet end of the water outlet pipe is connected to the magnetic separation device.

3. The fluidized bed device based on three-dimensional electrocatalytic oxidation according to claim 2, characterized in that: The magnetic separation equipment is provided with an electrode material reflux port and a drain port. The electrode material reflux port is connected to the fluidized bed through a reflux pipe, and the drain port is connected to a wastewater collection device.

4. The fluidized bed device based on three-dimensional electrocatalytic oxidation according to claim 3, characterized in that: The discharge end of the reflux pipe is arranged between the aeration pipe and the reaction zone.

5. The fluidized bed device based on three-dimensional electrocatalytic oxidation according to claim 1, characterized in that: The anode plate is a Ti4O7 modified electrode.

6. The fluidized bed device based on three-dimensional electrocatalytic oxidation according to claim 1, characterized in that: The cathode plate is a stainless steel electrode.

7. The fluidized bed device based on three-dimensional electrocatalytic oxidation according to claim 1, characterized in that: A plurality of aeration holes are evenly distributed on the aeration pipe.

8. The fluidized bed device based on three-dimensional electrocatalytic oxidation according to claim 1, characterized in that: The particle size of the iron-carbon particle electrode material is 5 to 20 um.

9. The fluidized bed device based on three-dimensional electrocatalytic oxidation according to claim 1, characterized in that: It also includes a photovoltaic power generation device, which is electrically connected to the fluidized bed body.

10. The fluidized bed device based on three-dimensional electrocatalytic oxidation according to claim 9, characterized in that: The photovoltaic power generation device comprises a distributed photovoltaic power generation panel and a power controller. The distributed photovoltaic power generation panel and the power controller are electrically connected. The power controller is respectively connected to the anode plate and the cathode plate.

Images