CN114014417A - Fluidized bed purification system with magnetic particles and application method thereof - Google Patents
Fluidized bed purification system with magnetic particles and application method thereof Download PDFInfo
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- 238000000746 purification Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims description 18
- 239000007788 liquid Substances 0.000 claims abstract description 53
- 230000008929 regeneration Effects 0.000 claims abstract description 47
- 238000011069 regeneration method Methods 0.000 claims abstract description 47
- 239000006148 magnetic separator Substances 0.000 claims abstract description 35
- 238000006243 chemical reaction Methods 0.000 claims abstract description 20
- 238000011001 backwashing Methods 0.000 claims abstract description 15
- 238000003756 stirring Methods 0.000 claims abstract description 11
- 239000010410 layer Substances 0.000 claims description 22
- 239000011550 stock solution Substances 0.000 claims description 15
- 239000011247 coating layer Substances 0.000 claims description 14
- 125000000524 functional group Chemical group 0.000 claims description 8
- 238000000926 separation method Methods 0.000 claims description 7
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- 238000005265 energy consumption Methods 0.000 abstract description 3
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
- C02F1/488—Treatment of water, waste water, or sewage with magnetic or electric fields for separation of magnetic materials, e.g. magnetic flocculation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/288—Treatment of water, waste water, or sewage by sorption using composite sorbents, e.g. coated, impregnated, multi-layered
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
- C02F1/484—Treatment of water, waste water, or sewage with magnetic or electric fields using electromagnets
- C02F1/485—Treatment of water, waste water, or sewage with magnetic or electric fields using electromagnets located on the outer wall of the treatment device, i.e. not in contact with the liquid to be treated, e.g. detachable
Abstract
The invention provides a fluidized bed purification system with magnetic particles, which comprises a fluidized bed reactor, a magnetic separator, a magnetic particle regeneration system and a clear liquid tank which are connected in sequence; the magnetic separator is respectively connected with the clear liquid tank and the magnetic particle regeneration system through pipelines; the outer side of the fluidized bed reactor is provided with a plurality of magnetic field generators, the magnetic particle regeneration system is connected with a first backwashing system, and the magnetic separator is also connected with a second backwashing system. The invention utilizes the magnetic field to drive the magnetic particles to rotate to replace the traditional stirring part, thereby reducing the energy consumption and improving the reaction efficiency; the multi-magnetic field can provide the disturbance direction of the magnetic particles, increase the shearing force among the magnetic particles, reduce the surface agglomeration of the magnetic particles and ensure that the reaction is more sufficient; the magnetic separator and the magnetic particle regeneration system can repeatedly use the magnetic particles, the whole reaction process is uninterrupted, continuous work is realized, and the working efficiency is improved.
Description
Technical Field
The invention relates to the technical field of fluidized bed filtration and separation, in particular to a fluidized bed purification system with magnetic particles and an application method thereof.
Background
The fluidized bed reactor is a reactor in which solid particles are in a suspended state by passing a gas or a liquid through a granular solid layer, and a gas-solid phase reaction process or a liquid-solid phase reaction process is performed. At present, a fluidized bed reactor is mainly applied to the aspects of petrochemical industry, fine chemical industry, medicine, food, grain and oil, waste residue treatment and the like, such as wastewater treatment, catalyst recovery and regeneration and the like.
The pollutants in the wastewater are mainly organic pollutants and metal pollutants, and other large-particle substances (such as powder, catalyst, resin and the like) may exist in the chemical wastewater. Different pollutants are respectively treated through a plurality of procedures in the wastewater treatment process, the procedures are complicated, the treatment process and factors influencing the treatment effect are complex, and the cost is high.
The existing fluidized bed reactor is usually provided with a stirring device to realize the sufficient mixing and reaction of various phase media, but the stirring effect of the large fluidized bed reactor is poor, the energy consumption is high, so people improve the stirring device, and the magnetic rotor or the magnetic particles are used for stirring.
In addition, the magnetic field commonly used at present is that a magnetic field is added at the bottom or the top of the fluidized bed reactor to drive the rotor to work, the direction of the magnetic field is single, after reactants in the fluidized bed reactor rotate along with the magnetic field, the shearing force between the reactants is weakened, and the reaction effect is reduced.
Therefore, it is necessary to solve the problem of achieving sufficient agitation by a magnetic field and ensuring continuous operation of the fluidized bed reactor.
In view of the above, there is a need for an improved fluidized bed reactor in the prior art to solve the above problems.
Disclosure of Invention
The invention aims to disclose a fluidized bed purification system with magnetic particles, which can realize rapid and efficient reaction by driving the magnetic particles to stir substances to be reacted through a magnetic field, can realize repeated use of the magnetic particles by utilizing a magnetic particle regeneration system to regenerate the magnetic particles, and can continuously work. In addition, the magnetic particles adopt substances with porous structures, and various functional groups are added on the surfaces of the substances, and can be used as reaction media.
In order to achieve the aim, the invention provides a fluidized bed purification system with magnetic particles, which comprises a fluidized bed reactor (1), a magnetic separator (4), a magnetic particle regeneration system (6) and a clear liquid tank (5) which are connected in sequence; the magnetic separator (4) is respectively connected with a clear liquid tank (5) and a magnetic particle regeneration system (6) through pipelines; the device is characterized in that a plurality of magnetic field generators (2) are arranged on the outer side of the fluidized bed reactor (1), the magnetic particle regeneration system (6) is connected with a first backwashing system (12), and the magnetic separator (4) is further connected with a second backwashing system (13).
In some embodiments, the fluidized bed reactor (1) is provided with a plurality of adjacent magnetic field generators (2) at the outer side along the radial direction or the axial direction, and a partition plate is arranged between the adjacent magnetic field generators (2).
In some embodiments, the magnetic field generator (2) consists of a single set or multiple sets of electromagnetic coils.
In some embodiments, the liquid outlet of the magnetic particle regeneration system (6) is connected with the first backwashing system (12) and the clear liquid tank (5), and the bottom of the magnetic particle regeneration system (6) is connected with the magnetic particle collecting tank (7).
In some embodiments, the magnetic particle collection tank (7) is connected to a magnetic particle storage tank (9) by a self-priming pump (8), the magnetic particle storage tank (9) being connected to the fluidized bed reactor (1).
In some embodiments, a cartridge filter (10) is further arranged between the clear liquid tank (5) and the magnetic separator (4).
In some embodiments, the fluidized bed reactor (1) is further connected with a magnetic particle addition tank (11).
In some embodiments, an aeration device is arranged at the bottom of the fluidized bed reactor (1), and a liquid inlet of the fluidized bed reactor (1) is connected with a raw liquid tank.
The second purpose of the invention is to disclose an application method of the fluidized bed purification system with the magnetic particles, by which continuous treatment of wastewater and waste liquid treatment and repeated use of the magnetic particles can be realized.
In order to achieve the above object, the present invention provides a method for applying the fluidized bed purification system with magnetic particles, comprising the following steps:
step 1: liquid-charging reaction
Introducing stock solution and magnetic particles into the fluidized bed reactor (1), starting the magnetic field generator (2), and driving the magnetic particles to stir the stock solution for reaction through a magnetic field generated by the magnetic field generator (2);
step 2: magnetic particle separation
Introducing the liquid reacted in the step (1) into a magnetic separator (4), adsorbing magnetic particles in the liquid onto a magnetic pole (41) by using the magnetic separator (4) to complete the separation of the magnetic particles and the liquid, and introducing the separated liquid into a clear liquid tank (5) for collection;
and step 3: magnetic particle regeneration
Closing a valve at the inlet of the clear liquid tank (5), opening a liquid inlet valve of the magnetic particle regeneration system (6), closing a magnetic field of the magnetic separator (4), and allowing the magnetic particles to fall off from the magnetic pole (41) and enter the magnetic particle regeneration system (6) to start a regeneration reaction;
and 4, step 4: collecting magnetic particles
Through the regeneration of the magnetic particles in the step 3, the magnetic particles are collected in a magnetic particle collecting tank (7) and can be reused.
In some embodiments, the magnetic field generator (2) in step 1 is a radial coil or an axial coil, and the radial coil or the axial coil generates magnetic field intensity after being electrified with direct current.
In some embodiments, in step 2, the magnetic separator (4) has a magnetic strength of 0.3T to 2T.
In some embodiments, the magnetic particle has a four-layer structure, wherein the innermost first layer is a magnetic core, the second layer is a dense coating layer, the third layer is a porous coating layer, and the fourth layer is a functional group layer.
In some embodiments, the magnetic core particle size ranges from 10nm to 1mm, the dense coating layer has a thickness of 1 μm to 100 μm, and the porous coating layer has a thickness of 5 μm to 1 mm.
Compared with the prior art, the invention has the beneficial effects that: (1) the magnetic field is used for driving the magnetic particles to rotate to replace the traditional stirring part, so that the energy consumption is reduced, and the reaction efficiency is improved; (2) the multi-magnetic field can provide the disturbance direction of the magnetic particles, increase the shearing force among the magnetic particles, reduce the surface agglomeration of the magnetic particles and ensure that the reaction is more sufficient; (3) the magnetic separator and the magnetic particle regeneration system can repeatedly use the magnetic particles, the whole reaction process is uninterrupted, continuous work is realized, and the working efficiency is improved; (4) the magnetic particle has a porous structure with high adsorbability, and the surface of the magnetic particle is provided with functional groups and can be used as a reaction medium.
Drawings
FIG. 1 is a schematic diagram of a fluidized bed purification system with magnetic particles according to the present invention;
description of reference numerals: 1. a fluidized bed reactor; 2. a magnetic field generator; 3. a booster pump; 4. a magnetic separator; 41. a magnetic pole; 5. a clear liquid tank; 6. a magnetic particle regeneration system; 7. a magnetic particle collection tank; 8. a self-priming pump; 9. a magnetic particle storage tank; 10. a cartridge filter; 11. a magnetic particle addition tank; 12. a first backwash system; 13. a second backwash system.
Detailed Description
The present invention is described in detail with reference to the embodiments shown in the drawings, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should understand that functional, methodological, or structural equivalents or substitutions made by these embodiments are within the scope of the present invention.
Example 1
As shown in fig. 1, the present embodiment provides a fluidized bed purification system with magnetic particles, which includes a fluidized bed reactor 1, a magnetic separator 4, a magnetic particle regeneration system 6 and a clear liquid tank 5 connected in sequence; the magnetic separation 4 is respectively connected with a clear liquid tank 5 and a magnetic particle regeneration system 6 through pipelines; the magnetic particle regeneration system 6 is connected with a first backwashing system 12, and the magnetic separator 4 is also connected with a second backwashing system 13.
The liquid inlet of the fluidized bed reactor 1 is connected with a raw liquid tank. The liquid outlet of the magnetic particle regeneration system 6 is respectively connected with the first backwashing system 12 and the clear liquid tank 5, and the bottom of the magnetic particle regeneration system 6 is connected with a magnetic particle collecting tank 7. The top liquid return port of the magnetic particle regeneration system 6 can also be connected to the fluidized bed reactor 1 to ensure that the magnetic particle regeneration system 6 is filled with liquid at any time when the magnetic particles are regenerated.
The magnetic particle regeneration system 6 is a cluster filter or a dynamic ceramic membrane filtration system, and in this embodiment, a cluster filter is preferred, in which a plurality of filter elements are arranged, when magnetic particles are regenerated, the magnetic particles are intercepted on the surfaces of the filter elements, and can be subjected to regeneration treatment such as washing, backwashing, back-flushing drying and the like through the first backwashing system 12, and the treated magnetic particles are discharged into the magnetic particle collection tank 7 to be used.
The magnetic particle collection tank 7 is connected to a magnetic particle storage tank 9 through a self-priming pump 8, and the magnetic particle storage tank 9 is connected with the fluidized bed reactor 1. The fluidized bed reactor 1 is also connected with a magnetic particle addition tank 11. In the process of treating waste water and waste liquid, the magnetic particles can be timely supplemented into the fluidized bed reactor 1.
In addition, a security filter 10 is arranged between the clear liquid tank 5 and the magnetic separator 4. To prevent the magnetic separator 4 from incompletely adsorbing magnetic particles to cause the liquid in the clear liquid tank 5 to be polluted again.
An aeration device may be provided at the bottom of the fluidized bed reactor 1 according to the kind, concentration and viscosity of the raw liquid. When treating high-viscosity and high-concentration stock solution, an aeration device at the bottom of the fluidized bed reactor 1 can be opened to increase the fluidity of the stock solution.
In the invention, a plurality of magnetic field generators 2 are arranged on the outer side of the fluidized bed reactor 1, the magnetic field generators 2 are arranged on the outer side of the fluidized bed reactor 1 along the radial direction or the axial direction, and the magnetic field generators 2 can be adjacently arranged along the radial direction and oppositely arranged along the axial direction, so that magnetic fields with different directions and/or strengths are provided.
According to the structure and diameter of the fluidized bed reactor 1, the magnetic field generator 2 can be arranged outside the fluidized bed reactor 1 at any angle with the radial direction besides being arranged along the radial direction or the axial direction.
The magnetic field generator 2 consists of a single set or multiple sets of electromagnetic coils. The magnetic field generator 2 is composed of a radial coil or an axial coil, and the radial coil or the axial coil generates magnetic field intensity after being electrified with direct current.
As shown in fig. 1, in the present embodiment, two sets of magnetic field generators 2 are disposed on the outer side of the fluidized bed reactor 1 along the radial direction, and each set of magnetic field generators 2 is located on the same circumferential surface. The magnetic field generators 2 of the same group may be arranged axisymmetrically on both sides of the fluidized-bed reactor 1, depending on the diameter of the fluidized-bed reactor 1. Wherein, be equipped with the baffle between the adjacent magnetic field generator 2 about the homonymy, prevent that the magnetic field that upper and lower two sets of magnetic field generator 2 produced from influencing each other.
In this embodiment, the magnetic particle has a four-layer structure, in which the innermost first layer is a magnetic core, the second layer is a dense coating layer, the third layer is a porous coating layer, and the fourth layer is a functional group layer. The magnetic core is Fe3O4, the particle size range of the magnetic core is 10 nm-1 mm, the thickness of the compact coating layer is 1 μm-100 μm, the thickness of the porous coating layer is 5 μm-1 mm, the adsorbability of the magnetic particles is increased by the porous structure of the porous coating layer, the fourth layer is a functional group layer, and the chemical reaction between the magnetic particles and substances in the stock solution is realized by grafting various functional groups on the porous coating layer, so that the treatment effect is achieved.
Aiming at different stock solutions to be treated, if substances needing to be adsorbed, desorbed, catalyzed and the like react in the stock solutions, the magnetic particles with functional groups can react with the stock solutions to realize purification treatment.
The magnetic particles are driven by the magnetic field to stir substances to be reacted, so that rapid and efficient reaction is realized, the magnetic particles are regenerated by the magnetic particle regeneration system 6, the magnetic particles can be repeatedly used, and the fluidized bed purification system continuously works.
The application method of the fluidized bed purification system with magnetic particles in the embodiment comprises the following steps:
step 1: liquid-charging reaction
And (3) introducing stock solution and magnetic particles into the fluidized bed reactor 1, starting the magnetic field generator 2, and driving the magnetic particles to stir the stock solution for reaction through a magnetic field generated by the magnetic field generator 2. If the stock solution is high in viscosity and concentration or the particulate matters in the stock solution are more, an aeration device at the bottom of the fluidized bed reactor 1 can be opened, a plurality of groups of magnetic field generators 2 are added to generate magnetic fields with different directions and strengths, and the stock solution and the magnetic particles are fully mixed, stirred and reacted.
Step 2: magnetic particle separation
And (2) introducing the liquid reacted in the step (1) into a magnetic separator (4) through a booster pump (3), adsorbing magnetic particles in the liquid on a magnetic pole (41) by using the magnetic separator (4), wherein the magnetic strength of the magnetic separator (4) is 0.3T-2T, and different magnetic strengths are selected according to the quantity of the magnetic particles in the fluidized bed reactor (1). And (5) completing the separation of the magnetic particles and the liquid, and introducing the separated liquid into a clear liquid tank 5 for collection.
The magnetic pole 41 in the magnetic separator 4 can be a multi-column or single-column net structure to increase the contact area between the magnetic pole 41 and the magnetic particles and provide the adsorption.
The magnetic separator 4 is connected to a second backwashing system 13, which can perform a first cleaning of the magnetic particles on the magnetic poles 41 inside the magnetic separator 4 to achieve a partial regeneration of the magnetic particles.
And step 3: magnetic particle regeneration
And (3) closing a valve at the inlet of the clear liquid tank 5, opening a liquid inlet valve of the magnetic particle regeneration system 6, closing the magnetic field of the magnetic separator 4, and leading the magnetic particles to fall off from the magnetic pole 41 and enter the magnetic particle regeneration system 6 to start regeneration reaction.
After the magnetic particles are cleaned for the first time in the magnetic separator 4, the magnetic field in the magnetic separator 4 is closed, and the magnetic particles are introduced into the magnetic particle regeneration system 6 for cleaning for the second time.
The magnetic particle regeneration system 6 is connected to a first backwashing system 12, and can wash magnetic particles with a solvent or clean water, and after washing the magnetic particles for a plurality of times, the magnetic particles are purged and dried with a gas to complete the regeneration treatment.
And 4, step 4: collecting magnetic particles
By regenerating the magnetic particles in step 3, the magnetic particles are collected in the magnetic particle collection tank 7 and can be reused.
As shown in fig. 1, the magnetic particle collection tank 7 is connected to a magnetic particle storage tank 9 through a self-priming pump 8, the magnetic particles after the regeneration treatment are stored in the magnetic particle storage tank 9, and when the fluidized bed reactor 1 needs to be replenished with magnetic particles, a valve of the magnetic particle storage tank 9 can be opened to replenish the magnetic particles into the fluidized bed reactor 1 for use.
In this embodiment, the fluidized bed purification system with magnetic particles can continuously operate, and the magnetic particles are reacted in the fluidized bed reactor 1, regenerated, and added to the fluidized bed reactor 1 again. In order to keep the amount of magnetic particles in the fluidized bed reactor 1 constant, the fluidized bed reactor 1 is further connected with a magnetic particle addition tank 11. The magnetic particles in the magnetic particle addition tank 11 are new, and when the magnetic particles in the magnetic particle storage tank 9 are damaged and cannot be used, the new magnetic particles in the magnetic particle addition tank 11 can be timely replenished into the fluidized bed reactor 1 for use.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (13)
1. A fluidized bed purification system with magnetic particles is characterized by comprising a fluidized bed reactor (1), a magnetic separator (4), a magnetic particle regeneration system (6) and a clear liquid tank (5) which are connected in sequence; the magnetic separator (4) is respectively connected with a clear liquid tank (5) and a magnetic particle regeneration system (6) through pipelines;
the device is characterized in that a plurality of magnetic field generators (2) are arranged on the outer side of the fluidized bed reactor (1), the magnetic particle regeneration system (6) is connected with a first backwashing system (12), and the magnetic separator (4) is further connected with a second backwashing system (13).
2. The fluidized bed purification system with magnetic particles as claimed in claim 1, wherein a plurality of adjacent magnetic field generators (2) are arranged outside the fluidized bed reactor (1) along the radial direction or the axial direction, and a partition is arranged between the adjacent magnetic field generators (2).
3. The fluidized bed purification system with magnetic particles as claimed in claim 2, wherein the magnetic field generator (2) consists of a single set or multiple sets of electromagnetic coils.
4. The fluidized bed purification system with magnetic particles as claimed in claim 3, wherein the liquid outlet of the magnetic particle regeneration system (6) is connected with the first backwashing system (12) and the clear liquid tank (5), respectively, and the bottom of the magnetic particle regeneration system (6) is connected with the magnetic particle collection tank (7).
5. Fluidized bed purification system with magnetic particles according to claim 4, characterized in that the magnetic particle collection tank (7) is connected to a magnetic particle storage tank (9) by a self-priming pump (8), the magnetic particle storage tank (9) being connected to the fluidized bed reactor (1).
6. The fluidized bed purification system with magnetic particles as claimed in claim 5, wherein a cartridge filter (10) is further arranged between the clear liquid tank (5) and the magnetic separator (4).
7. The fluidized bed purification system with magnetic particles as claimed in claim 6, wherein the fluidized bed reactor (1) is further connected with a magnetic particle addition tank (11).
8. The fluidized bed purification system with magnetic particles as claimed in claim 7, wherein an aeration device is arranged at the bottom of the fluidized bed reactor (1), and a liquid inlet of the fluidized bed reactor (1) is connected with a raw liquid tank.
9. A method for using a fluidized bed purification system with magnetic particles as claimed in any one of claims 1 to 8, comprising the steps of:
step 1: liquid-charging reaction
Introducing stock solution and magnetic particles into the fluidized bed reactor (1), starting the magnetic field generator (2), and driving the magnetic particles to stir the stock solution for reaction through a magnetic field generated by the magnetic field generator (2);
step 2: magnetic particle separation
Introducing the liquid reacted in the step (1) into a magnetic separator (4), adsorbing magnetic particles in the liquid onto a magnetic pole (41) by using the magnetic separator (4) to complete the separation of the magnetic particles and the liquid, and introducing the separated liquid into a clear liquid tank (5) for collection;
and step 3: magnetic particle regeneration
Closing a valve at the inlet of the clear liquid tank (5), opening a liquid inlet valve of the magnetic particle regeneration system (6), closing a magnetic field of the magnetic separator (4), and allowing the magnetic particles to fall off from the magnetic pole (41) and enter the magnetic particle regeneration system (6) to start a regeneration reaction;
and 4, step 4: collecting magnetic particles
Through the regeneration of the magnetic particles in the step 3, the magnetic particles are collected in a magnetic particle collecting tank (7) and can be reused.
10. The method of using the fluidized bed purification system with magnetic particles as claimed in claim 9, wherein the magnetic field generator (2) in step 1 is a radial coil or an axial coil, and the radial coil or the axial coil generates magnetic field intensity after being energized with direct current.
11. The method for using the fluidized bed purification system with magnetic particles as claimed in claim 9, wherein in the step 2, the magnetic strength of the magnetic separator (4) is 0.3T-2T.
12. The method of claim 9, wherein the magnetic particles are in a four-layer structure, the innermost layer of the four-layer structure is a magnetic core, the second layer is a dense coating layer, the third layer is a porous coating layer, and the fourth layer is a functional group layer.
13. The method of claim 12, wherein the magnetic core has a particle size in the range of 10nm to 1mm, the dense coating layer has a thickness of 1 μm to 100 μm, and the porous coating layer has a thickness of 5 μm to 1 mm.
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| CN202111297155.2A CN114014417A (en) | 2021-11-04 | 2021-11-04 | Fluidized bed purification system with magnetic particles and application method thereof |
| PCT/CN2021/136332 WO2023077608A1 (en) | 2021-11-04 | 2021-12-08 | Fluidized bed purification system with magnetic particles and application method therefor |
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