A general-purpose magnetic catalyst wastewater treatment device
By integrating catalyst reaction, mixing, and solid-liquid separation units into wastewater treatment equipment, and utilizing magnetic field control of catalyst state and stirring device, the problems of catalyst loss and poor equipment stability in existing equipment are solved, achieving efficient and stable wastewater treatment results, and making it suitable for industrial applications with various catalysts and water qualities.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CENT SOUTH UNIV
- Filing Date
- 2026-05-22
- Publication Date
- 2026-07-31
AI Technical Summary
Existing magnetic catalyst wastewater treatment equipment suffers from problems such as severe catalyst loss, difficulty in recovery, high operating costs, large equipment footprint, complex processes, uneven water distribution, low catalyst utilization, and inconvenient maintenance. Furthermore, the lack of a dedicated holding structure for magnetic catalysts results in poor long-term operational stability and makes it difficult to adapt to the treatment needs of various catalysts and water qualities.
Adopting a vertical integrated structure, the shell is equipped with a water outlet unit, a catalyst reaction unit, a mixing reaction unit, and a sludge collection unit from top to bottom. Utilizing magnetic packing and DC coils, the magnetization state of the catalyst is controlled by a magnetic field. Combined with a magnetic field retention grid and a stirring device, the catalyst is efficiently retained and uniformly mixed, integrating the functions of reagent mixing, catalytic reaction, and solid-liquid separation into one unit.
It improves catalyst utilization and equipment space utilization, reduces operating costs, enhances treatment effect, adapts to a variety of magnetic catalysts, ensures equipment stability and convenience, and is suitable for deep treatment of industrial wastewater in chemical, printing and dyeing, pharmaceutical, electroplating and other industries.
Smart Images
Figure CN122482602A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the technical field of wastewater treatment equipment, specifically a general-purpose magnetic catalyst wastewater treatment device. Background Technology
[0002] In the advanced treatment of industrial wastewater, magnetic catalysts are widely used in catalytic oxidation, catalytic reduction, and adsorption purification processes due to their advantages such as large specific surface area, high activity, and easy magnetic separation. However, existing related equipment is mostly fixed-bed reactors or stirred tank reactors, which have significant shortcomings in actual operation: catalyst loss with the water flow is severe, recovery is difficult, and operating costs are high; the reaction unit and solid-liquid separation unit are independent, resulting in large equipment footprint, complex processes, and high energy consumption; uneven water distribution easily causes short-circuiting and channeling, leading to low catalyst utilization; and there is a lack of specific holding structures for magnetic catalysts, failing to fully utilize the magnetic retention characteristics of magnetic materials.
[0003] Existing equipment is not compatible with various magnetic catalysts, has poor versatility, and cannot meet the treatment needs of different water qualities and catalytic systems. It also suffers from inconvenient maintenance, easy sludge accumulation and clogging, and poor long-term operational stability. Therefore, there is an urgent need to develop an integrated treatment device that is compact, has high catalyst retention efficiency, uniform water distribution, strong versatility, stable operation, and easy maintenance. Summary of the Invention
[0004] This invention addresses the shortcomings of existing technologies by providing a universal magnetic catalyst wastewater treatment device that integrates multiple treatment functions into a single housing, reducing floor space, facilitating equipment installation and layout, and improving space utilization.
[0005] To achieve the above objectives, this invention proposes a universal magnetic catalyst wastewater treatment device, comprising a shell, and inside the shell, from top to bottom, an effluent unit, a catalyst reaction unit, a mixing reaction unit, and a sludge collection unit are arranged sequentially. The catalyst reaction unit is filled with magnetically conductive packing material, and a magnetic field retention grid is installed at the inlet of the catalyst reaction unit. A DC coil is wound around the outside of the shell in the area where the catalyst reaction unit is located. The magnetization state of the magnetically conductive packing material and the magnetic field retention grid is switched by controlling the energization and de-energization of the DC coil.
[0006] In this embodiment, the top of the housing is provided with a water outlet pipe that communicates with the water outlet unit, and a water distributor is installed inside the housing on the inlet side of the water outlet unit, which separates the catalyst reaction unit from the water outlet unit.
[0007] In this embodiment, a packing support grid is provided at the inlet of the catalyst reaction unit inside the shell; magnetic packing is filled between the water distributor and the packing support grid.
[0008] In this embodiment, the magnetic field retention grid is a cylindrical shape with openings at the top and bottom. The cylindrical wall of the magnetic field retention grid is composed of multiple grid bars arranged along the axial direction. The multiple grid bars are evenly arranged with the central axis of the magnetic field retention grid as the center, and gaps are provided between adjacent grid bars to allow water to flow through.
[0009] In this embodiment, the magnetic field retention grid is made of a high-permeability metal material.
[0010] In this embodiment, a water inlet pipe and a reagent dosing pipe are provided on the side wall of the shell and are connected to the mixing reaction unit. A stirring device is installed inside the shell in the area where the mixing reaction unit is located.
[0011] In this embodiment, the stirring device includes a stirring shaft and a stirring impeller. The stirring shaft is rotatably mounted inside the housing and arranged along the central axis of the mixing reaction unit. The stirring shaft is driven to rotate by a drive motor. The stirring impeller is coaxially mounted on the stirring shaft and is located in the lower part of the mixing reaction unit. When the stirring impeller rotates, it drives the water flow from bottom to top, so that an enhanced mixing zone is formed above the stirring impeller in the mixing reaction unit.
[0012] In this embodiment, a sludge discharge pipe is provided at the bottom of the shell, which is connected to the sludge collection unit.
[0013] In this embodiment, the top of the housing is provided with a removable top cover, and the water outlet pipe is installed on the top cover.
[0014] In this embodiment, the magnetic filler is spherical and made of soft iron, pure iron, or iron-nickel alloy.
[0015] Compared with the prior art, the present invention has the following technical effects:
[0016] 1. A magnetic packing material is installed inside the catalyst reaction unit, and a DC coil is wound around the outside of the shell. By controlling the energization and de-energization of the DC coil, the external magnetic field acting on the magnetic packing material is changed, switching the magnetization state of the magnetic packing material. When energized, the magnetic packing material is magnetized, thereby adsorbing the magnetic catalyst. The magnetic packing material adsorbs the magnetic catalyst on its surface. On the one hand, it prevents the catalyst from being lost with the water flow. On the other hand, after the magnetic catalyst is adsorbed onto the magnetic packing material, it can effectively increase the contact area between the catalyst and the wastewater, effectively retaining the magnetic catalyst in the catalyst reaction unit and allowing it to fully react with the wastewater. When the DC coil is de-energized, the magnetic packing material is demagnetized, which facilitates the separation of the magnetic catalyst from the magnetic packing material. This makes it convenient for the disassembly, replacement, and regeneration of the packing material and improves the flexibility and convenience of the equipment.
[0017] 2. A magnetic field retention grid is installed at the inlet of the catalyst reaction unit. The magnetic field retention grid is a cylindrical shape with openings at the top and bottom. The cylinder wall is composed of multiple grid strips evenly distributed along the axial direction and is made of high magnetic permeability metal material. It works in conjunction with the external DC coil. The magnetic field retention grid uses its own magnetic permeability to gather the excitation magnetic field lines, regulate the direction of the magnetic field, and precisely confine and lock the magnetic field within the internal area of the catalyst packing layer. This inhibits the outward diffusion of the magnetic field and energy attenuation, forming a stable and concentrated local weak magnetic field environment. This continuously exerts a magnetic adsorption and limiting effect on the magnetic catalyst, further preventing the magnetic catalyst from being lost with the water flow, ensuring the effective utilization of the catalyst, and improving the treatment effect.
[0018] 3. The side wall of the mixing reaction unit is equipped with a water inlet pipe and a reagent dosing pipe. An agitator is installed inside, and the agitator impeller is located in the lower part of the mixing reaction unit. The rotation of the agitator impeller drives the water flow from bottom to top, so that an enhanced mixing zone is formed above the agitator impeller in the mixing reaction unit. In this zone, the mixed liquid generates stronger shear and turbulence under the rotation of the impeller, which can fully mix the wastewater and the added reagent, thereby improving the efficiency of chemical reaction and enhancing the wastewater treatment effect.
[0019] In summary, this invention adopts a vertical integrated structure, with an effluent unit, catalyst reaction unit, mixing reaction unit, and sludge collection unit arranged sequentially from top to bottom within the shell. It integrates reagent mixing, catalytic reaction, catalyst retention, solid-liquid separation, and sludge collection into a single device, resulting in a compact overall structure. This integration of multiple treatment functions within a single shell reduces floor space, facilitates equipment installation and layout, and improves space utilization. This invention is compatible with various magnetic catalysts, including magnetically supported oxidation catalysts, magnetic reduction catalysts, and magnetic adsorption catalysts. Through the combination of a DC coil and magnetically conductive packing, it achieves high catalyst retention efficiency and low loss rate, reducing catalyst consumption and lowering operating costs. It can be applied to the deep treatment of industrial wastewater in industries such as chemical, printing and dyeing, pharmaceutical, and electroplating, effectively removing recalcitrant organic matter, heavy metals, ammonia nitrogen, color, and other pollutants, with stable treatment results and good effluent quality. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the structure of the present invention.
[0021] Figure 2 This is a schematic diagram of the internal structure of the present invention.
[0022] Figure 3 This is a top view of the packing support grid of the present invention;
[0023] Figure 4 This is a schematic diagram of the magnetic field retention grid structure of the present invention.
[0024] Reference numerals: 1. Shell; 2. Outlet pipe; 3. Outlet water distributor; 4. Magnetic packing material; 5. Packing material support grid; 6. Magnetic field retention grid; 7. Inlet pipe; 8. Chemical dosing pipe; 9. Stirring shaft; 10. Stirring impeller; 11. Enhanced mixing zone; 12. Sludge discharge pipe; 13. Negative pressure device; 14. Top cover; 15. Bolt; 17. DC coil; 18. Magnetic catalyst. Detailed Implementation
[0025] 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 a part of the embodiments of the present invention, and not all of the 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.
[0026] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.
[0027] like Figures 1 to 4 As shown, this invention provides a universal magnetic catalyst wastewater treatment device, comprising a vertical cylindrical shell 1. Inside the shell 1, from top to bottom, are arranged an effluent unit, a catalyst reaction unit, a mixing reaction unit, and a sludge collection unit. An effluent pipe 2, communicating with the effluent unit, is located at the top of the shell 1. An effluent distributor 3 is installed inside the shell 1 on the inlet side of the effluent unit, separating the catalyst reaction unit from the effluent unit. A packing support grid 5 is provided at the inlet of the catalyst reaction unit inside the shell 1. Magnetic packing 4 is filled in the area between the effluent distributor 3 and the packing support grid 5 within the catalyst reaction unit. A magnetic field retention grid 6 is installed below the packing support grid 5 at the inlet of the catalyst reaction unit. The outer side of the shell 1... A DC coil 17 is wound around the area where the catalyst reaction unit is located. The DC coil 17 is electrically connected to an external DC power supply through a circuit. By controlling the energization and de-energization of the DC coil 17, the external magnetic field acting on the magnetic packing 4 can be changed, thereby switching the magnetization state of the magnetic packing 4. When the DC coil 17 is energized to form an excitation magnetic field, the magnetic packing 4 is magnetized and adsorbs the magnetic catalyst 18, thereby effectively retaining the magnetic catalyst 18 in the catalyst reaction unit to fully react with the wastewater and preventing the catalyst from being lost with the water flow. When the DC coil 17 is de-energized and demagnetized, the magnetic packing 4 loses its magnetic attraction, and the magnetic catalyst 18 can be easily separated from the magnetic packing 4, which facilitates the disassembly, replacement, and catalyst regeneration of the packing.
[0028] like Figure 4As shown, the magnetic field retention grid 6 is a cylindrical shape with openings at the top and bottom. The cylindrical wall of the magnetic field retention grid 6 is composed of multiple grid strips arranged along the axial direction. The multiple grid strips are evenly arranged with the central axis of the magnetic field retention grid 6 as the center. There are gaps between adjacent grid strips for water to flow through. The magnetic field retention grid 6 is made of a high magnetic permeability metal material, such as soft iron, silicon steel sheet, cobalt iron alloy, cast iron, electrical pure iron, iron-nickel alloy, etc. The magnetic field retention grid 6 cooperates with the outer DC coil 17 to gather the excitation magnetic field lines by utilizing its own magnetic permeability and gathering characteristics. The grid structure of the magnetic field retention grid 6 regulates the magnetic field direction and precisely confines and locks the magnetic field in the internal area of the catalyst packing layer, suppressing the outward diffusion of the magnetic field and energy attenuation, forming a stable and concentrated local weak magnetic field environment, realizing the directional retention of the magnetic field, and continuously generating a magnetic adsorption and limiting effect on the magnetic catalyst 18, further preventing the magnetic catalyst 18 from being lost with the water flow.
[0029] The side wall of the shell 1 is equipped with an inlet pipe 7 and a reagent dosing pipe 8, which are connected to the mixing reaction unit. The inlet pipe 7 is connected to the wastewater outlet pipe. Inside the shell 1, in the area where the mixing reaction unit is located, there is a stirring device. The stirring device includes a stirring shaft 9 and a stirring impeller 10. The stirring shaft 9 is rotatably mounted inside the shell 1 and is arranged along the central axis of the mixing reaction unit. The stirring shaft 9 is driven to rotate by a drive motor. The stirring impeller 10 is coaxially mounted on the stirring shaft 9. When the stirring impeller 10 rotates, it drives the water flow from bottom to top. The stirring impeller 10 is located in the lower part of the mixing reaction unit, so that the mixing reaction unit forms an enhanced mixing zone above the stirring impeller. In this zone, the mixed liquid generates stronger shear and turbulence under the rotation of the impeller, which can fully mix the wastewater and add the reagent, thereby improving the chemical reaction efficiency and enhancing the wastewater treatment effect. The bottom of the shell 1 is equipped with a sludge discharge pipe 12, which is connected to the sludge collection unit.
[0030] like Figure 2 As shown, the top of the housing 1 is provided with a detachable top cover 14, which is convenient for disassembly, maintenance and packing replacement. The top cover 14 is sealed to the housing 1 by a flange. The top cover 14 and the flange on the housing 1 are fastened to each other by bolts 15. The water outlet pipe 2 is set on the top cover 14.
[0031] Furthermore, the magnetic filler 4 is spherical, with a regular shape, large specific surface area, and high mechanical strength, which can efficiently adsorb the magnetic catalyst 18. The magnetic filler 4 is made of soft iron, pure iron, or iron-nickel alloy, and the magnetic catalyst 18 is adsorbed on the outside of the iron sphere to form a magnetic retention layer; the shell 1 is made of stainless steel, with a total height of 1870mm, an inner diameter of φ273mm, a design pressure of 0.6MPa, and a design temperature of 5~40℃; Figure 3As shown, the filler support grid 5 includes a fixing ring whose outer diameter matches the inner diameter of the housing 1 and multiple grids installed in the fixing ring. The fixing ring is horizontally fixed on the inner wall of the housing 1, and the spacing between adjacent grids is smaller than that of the magnetic filler 4, thereby effectively supporting the magnetic filler 4.
[0032] In this embodiment, the magnetic catalyst 18 is a magnetically supported oxidation catalyst, a magnetic reduction catalyst, or a magnetic adsorption catalyst.
[0033] In this embodiment, the outlet pipe 2 is DN80, the inlet pipe 7 is DN100, the chemical dosing pipe 8 is DN32, and the sludge discharge pipe 12 is DN50.
[0034] With the above structure, the working process of this device is as follows:
[0035] Wastewater enters the mixing reaction unit through the inlet pipe 7, and the required reagents and magnetic catalyst 18 are simultaneously added through the reagent addition pipe 8. The drive motor starts, driving the stirring shaft 9 and the stirring impeller 10 to rotate, so that the wastewater and reagents are fully mixed. When the DC coil 17 is energized, the wastewater mixture flows upward into the enhanced mixing zone 11 for further homogenization, and then flows through the magnetic field retention grid 6 into the magnetic catalyst 18 reaction unit. The mixture flows upward through the magnetic packing 4 and collides with it, completing the pollutant removal reaction under the action of the magnetic catalyst 18. The magnetic packing 4 holds the magnetic... The catalyst 18 is effectively retained within the packing layer 4 to prevent it from being lost with the water flow. The treated wastewater flows upward through the effluent distributor 3, which uniformly collects the water after the catalytic reaction, gathers and disperses the water flow, and avoids excessively fast local water flow and uneven effluent flow, ensuring a consistent effluent flow rate across the entire cross-section. Finally, the treated wastewater is discharged from the effluent pipe 2. The sludge and impurities generated during the reaction process settle downward to the bottom sludge collection unit and are discharged through the sludge discharge pipe 12. When it is necessary to replace the packing iron balls or maintain the equipment, simply remove the bolts on the top cover 14 and remove the top cover 14 to perform the operation.
[0036] The above are merely preferred embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural transformations made under the concept of the present invention using the description and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.
Claims
1. A general-purpose magnetic catalyst wastewater treatment device, characterized in that, The device includes a shell, inside which, from top to bottom, are arranged an effluent unit, a catalyst reaction unit, a mixing reaction unit, and a sludge collection unit. The catalyst reaction unit is filled with magnetic packing material, and a magnetic field retention grid is installed at the inlet of the catalyst reaction unit. A DC coil is wound around the outside of the shell in the area where the catalyst reaction unit is located. The magnetization state of the magnetic packing material and the magnetic field retention grid is switched by controlling the energization and de-energization of the DC coil.
2. The general-purpose magnetic catalyst wastewater treatment device according to claim 1, characterized in that, The top of the housing is equipped with a water outlet pipe that communicates with the water outlet unit. Inside the housing, a water distributor is installed on the inlet side of the water outlet unit, which separates the catalyst reaction unit from the water outlet unit.
3. The general-purpose magnetic catalyst wastewater treatment device according to claim 1, characterized in that, The shell is equipped with a packing support grid at the inlet of the catalyst reaction unit; magnetic packing is filled between the water distributor and the packing support grid.
4. The general-purpose magnetic catalyst wastewater treatment device according to claim 1, characterized in that, The magnetic field retention grid is a cylindrical shape with openings at the top and bottom. The cylindrical wall of the magnetic field retention grid is composed of multiple grid bars arranged along the axial direction. The multiple grid bars are evenly arranged with the central axis of the magnetic field retention grid as the center, and there are gaps between adjacent grid bars to allow water to flow through.
5. The general-purpose magnetic catalyst wastewater treatment device according to claim 4, characterized in that, The magnetic field retention grid is made of a high-permeability metal.
6. The general-purpose magnetic catalyst wastewater treatment device according to claim 1, characterized in that, The side wall of the shell is equipped with a water inlet pipe and a reagent dosing pipe that are connected to the mixing reaction unit. Inside the shell, a stirring device is installed in the area where the mixing reaction unit is located.
7. The general-purpose magnetic catalyst wastewater treatment device according to claim 6, characterized in that, The stirring device includes a stirring shaft and a stirring impeller. The stirring shaft is rotatably mounted inside the housing and arranged along the central axis of the mixing reaction unit. The stirring shaft is driven to rotate by a drive motor. The stirring impeller is coaxially mounted on the stirring shaft and is located in the lower part of the mixing reaction unit. When the stirring impeller rotates, it drives the water flow from bottom to top, so that an enhanced mixing zone is formed above the stirring impeller in the mixing reaction unit.
8. The general-purpose magnetic catalyst wastewater treatment device according to claim 1, characterized in that, The bottom of the shell is equipped with a sludge discharge pipe that connects to the sludge collection unit.
9. The general-purpose magnetic catalyst wastewater treatment device according to claim 1, characterized in that, The top of the housing is equipped with a removable cover, and the water outlet pipe is located on the cover.
10. The general-purpose magnetic catalyst wastewater treatment device according to claim 1, characterized in that, The magnetic filler is spherical and made of soft iron, pure iron, or iron-nickel alloy.