Vertical magnetic cyclone precipitation combined device

Abstract

The utility model discloses a vertical magnetic cyclone precipitation combined device which comprises a secondary precipitation tank and a cyclone separator arranged in the secondary precipitation tank, the upper part of the cyclone separator is a cylindrical barrel, the lower part of the cyclone separator is of a conical structure, and an underflow outlet is formed in the bottom of the conical structure; a rotary magnetic system capable of generating spiral downward magnetic field force is arranged outside the cylindrical barrel; the inner wall of the cylindrical barrel is provided with a spiral magnetic conductive piece used for magnetism gathering and current stabilizing. A central overflow barrel is mounted in the cylindrical barrel, and an overflow discharge hole communicated with the secondary precipitation tank is formed in the top of the central overflow barrel; the side surface of the cylindrical barrel is connected with a tangential mud inlet pipe which is connected with a water inlet; a water outlet is formed in the top of the secondary precipitation tank. The device can be used for recovering a magnetic medium in magnetic coagulating sedimentation or a magnetic biofilm carrier in a magnetic biochemical system. The device has the characteristics of reasonable structural design, low energy consumption and wide application range, and is high in separation and recovery efficiency of the magnetic medium and the magnetic biofilm carrier.

Description

Technical Field

[0001] This utility model relates to the field of magnetic separation water treatment technology, specifically to a vertical magnetic cyclone sedimentation combined device, which can be used for the efficient recovery of magnetic media or magnetic biofilm carriers in magnetic coagulation sedimentation or magnetic biochemical systems. Background Technology

[0002] Current wastewater treatment plant upgrading and renovation projects face challenges such as compatibility between advanced treatment upgrades and existing processes, and limited available land area. Furthermore, the prevalent issues of large fluctuations in influent quality, high levels of recalcitrant pollutants, and low carbon-to-nitrogen ratios in mixed industrial and domestic wastewater treatment plants place higher demands on the upgrading and technological advancement of existing wastewater treatment processes. 2 Traditional biological nitrogen and phosphorus removal processes, such as O2O, are difficult to achieve simultaneously high-efficiency nitrogen and phosphorus removal and stable compliance of effluent. Magnetic coagulation high-density sedimentation tanks, which combine traditional coagulation sedimentation processes with magnetic separation equipment, can greatly accelerate the sedimentation and separation of sludge flocs, significantly reduce the building footprint, and thus increase the settling volume load of wastewater treatment structures. This is beneficial for improving the treatment effect of the final sedimentation tank in wastewater treatment plants and saving land area. Magnetic coagulation sedimentation technology has been widely adopted in the upgrading and renovation of final sedimentation tanks in wastewater treatment plants. The magnetic coagulation process generally uses magnetite powder as a magnetic medium to accelerate the rapid sedimentation of sludge flocs. The magnetic medium in the sludge flocs needs to be dispersed by a high-speed shearing machine and then recycled by a magnetic drum separator with high magnetic induction intensity (5000-8000 Gauss).

[0003] Increasing the concentration of activated sludge and the diversity of microbial communities on the basis of existing structures in wastewater treatment plants is also an important technical means to enhance biochemical efficiency and improve the quality and efficiency of wastewater treatment plants. Commonly used processes include MBBR and high-concentration powder carrier biological fluidized bed. MBBR process has problems such as small specific surface area of ​​packing material, local packing material accumulation, poor mixing state, and high energy consumption for stirring and aeration. High-concentration powder carrier biological fluidized bed introduces powder carriers (diatomaceous earth, bentonite, attapulgite, etc.) into the biological treatment tank to induce the formation of microorganisms with strong adhesion around the powder carrier as the core, thereby improving the diversity of microbial communities. It can achieve "dual sludge age" on the basis of "dual sludge process" and simultaneously improve nitrogen and phosphorus removal efficiency. At the same time, in the secondary sedimentation After sludge-water separation, the powder carrier in the sludge needs to be separated and recovered. The recovery of powder carrier is mainly based on the density difference between the powder carrier particles and the bioflocs, which is recovered by a hydrocyclone. However, the hydrocyclone is not very efficient at recovering low-density, small-particle-size powder carriers. Against this background, in recent years, due to the good magnetic responsiveness of magnetic biofilm carriers (iron-carbon micro powder, modified magnetite powder, magnetic biochar, etc.), magnetic carriers can be quickly and efficiently separated and recovered under the action of magnetic field force. The magnetic carrier biological fluidized bed process has good application potential in improving the quality and efficiency of existing sewage treatment plants and reducing pollution and carbon emissions. There is an urgent need to develop a vertical magnetic cyclone sedimentation combination device suitable for the efficient separation and recovery of weakly magnetic magnetic biofilm carriers.

[0004] The patent specification with announcement number CN219502981U discloses a magnetic cyclone separation device and a magnetic carrier biological fluidized bed system, including a rotating magnetic system, a tangential sludge inlet pipe, a vertical induction magnetic drum, a conical sedimentation tank, and an overflow separation zone. The rotating magnetic system, capable of generating a downward magnetic field force, is installed inside the second cylinder. Sludge containing magnetic carriers moves to the outside of the second cylinder under centrifugal force after passing through the tangential sludge inlet pipe. The magnetic carriers are subjected to opposite magnetic and centrifugal forces. The combined action of magnetic force, fluid force, and centrifugal force in different directions achieves precise peeling of the biofilm from the surface of the magnetic carriers. This system is mainly used for peeling magnetic carriers from aged biofilms in the secondary sedimentation tank of a magnetic carrier biological fluidized bed process and for the recovery of magnetic carriers. Magnetic carrier biological fluidization is suitable for improving the quality and efficiency of existing A / O process wastewater treatment plants and for in-situ expansion, and has advantages such as compact structure, low residual sludge production, and good settling performance. Utility Model Content

[0005] This invention provides a vertical magnetic cyclone sedimentation combination device, which overcomes the shortcomings of existing magnetic drum separators, such as complex magnetic media recovery processes and high recovery costs, as well as the low separation efficiency and poor selectivity of hydrocyclones for low-density particles on biofilm carriers. Based on the existing horizontal magnetic drum separator's magnetic system structure and hydrocyclone separation principle, this invention introduces a downward-spiraling vertical permanent magnet system, providing a vertical magnetic cyclone sedimentation combination device that achieves rapid and efficient separation and recovery of magnetic particles from magnetic media and magnetic biofilm carriers under the combined action of centrifugal force, gravity, and the downward-spiraling permanent magnet force.

[0006] A vertical magnetic cyclone sedimentation combined device includes a secondary sedimentation tank and a cyclone separator disposed in the secondary sedimentation tank;

[0007] The hydrocyclone separator has a cylindrical upper body and a conical lower body with an underflow outlet at the bottom. A rotating magnetic system composed of multiple layers of permanent magnets is mounted outside the cylindrical body to generate a downward spiral magnetic force. A spiral magnetic guide is welded to the inner wall of the cylindrical body for magnetic focusing and flow stabilization. A central overflow cylinder is installed inside the cylindrical body, with an overflow outlet at the top connecting to the secondary sedimentation tank. A tangential sludge inlet pipe is connected to the side of the cylindrical body, and this tangential sludge inlet pipe is connected to the water inlet.

[0008] A drain outlet is installed at the top of the secondary sedimentation tank.

[0009] The rotating magnetic system of the built-in magnetic cyclone separator of this utility model is located on the outside of the hydrocyclone. The magnetic force and centrifugal force on the magnetic particles are in the same direction. It is not only suitable for the efficient recovery of magnetic media such as strongly magnetic magnetite powder, but also suitable for the rapid enrichment and concentration of weakly magnetic magnetic biofilm carriers and magnetic sludge flocs. After being recovered from the bottom outlet of the hydrocyclone under the action of centrifugal force, some weakly magnetic magnetic particles can also be further separated and recovered through a secondary sedimentation tank. It has the advantages of more reasonable structural design, wider application field, higher separation and recovery efficiency and lower energy consumption.

[0010] The aforementioned vertical magnetic cyclone sedimentation unit can be used for the recovery of magnetic media or magnetic biofilm carriers in magnetic coagulation sedimentation or magnetic biochemical systems. The magnetic media may include magnetite powder with a magnetic content greater than 85 wt% and a particle size less than 85 μm. The magnetic biofilm carrier may include magnetic biochar, iron-based sludge carbon, etc., with a particle size of 20–50 μm.

[0011] For example, in the above-mentioned vertical magnetic cyclone sedimentation combined device, when in use, the mud-water mixture containing magnetic media or magnetic biofilm carriers enters the cyclone separator from the inlet through the tangential mud inlet pipe. Under the action of centrifugal force and the external magnetic field force of the rotating magnetic system, the magnetic media or magnetic biofilm carriers with magnetic responsiveness and high specific gravity accelerate to move towards the outer wall of the inner cylinder of the cyclone separator and accelerate to accumulate in the lower conical structure. Under the combined action of gravity and centrifugal force, they are discharged from the underflow outlet and recycled. Non-magnetic sludge particles and a small amount of weakly magnetic particles gather towards the center of the inner cylinder and overflow upwards. They overflow from the overflow outlet into the secondary sedimentation tank. After secondary sedimentation and separation, the supernatant is discharged from the drain outlet.

[0012] Combination Figure 1 Magnetic media coagulation and sedimentation systems typically consist of a reaction tank, a loading and mixing tank, a flocculation tank, and an inclined tube sedimentation tank. Based on a conventional coagulation and sedimentation tank, a magnetic medium with a higher specific gravity is added to the loading and mixing tank. Under the coagulation reaction, this medium reacts with coagulants (e.g., polyaluminum chloride, PAC) and flocculants (e.g., polyacrylamide, PAM) to form magnetic sludge flocs. These flocs then enter the inclined tube sedimentation tank for rapid sedimentation, forming magnetic sludge flocs containing the magnetic medium. This novel vertical magnetic cyclone sedimentation combination device can replace the high-speed shearing machine and magnetic drum separator used for magnetic medium recovery in existing magnetic coagulation and sedimentation systems.

[0013] In recent years, magnetic biofilm carriers and magnetic separation equipment have also been gradually applied to wastewater biochemical treatment processes, combined with Figure 2 For example, the derived magnetic biofilm carrier biological fluidized bed process continuously adds magnetic biofilm carriers to an aerobic tank to enrich functional bacteria and promote the growth of granular sludge. The magnetic biofilm carriers loaded with microorganisms can be recovered by the vertical magnetic vortex sedimentation combination device of this utility model to solve the contradiction between the sludge age of denitrifying bacteria and phosphorus removal bacteria, so as to improve the efficiency of biochemical treatment and reduce the amount of reagents and carbon sources used.

[0014] This utility model's vertical magnetic cyclone sedimentation combination device can be used for the recovery of magnetic media or magnetic biofilm carriers in magnetic coagulation sedimentation or magnetic biochemical systems. First, the sludge-water mixture is pumped by a sludge pump and enters a cylindrical body with a built-in cyclone separator through a tangential sludge inlet pipe. Under centrifugal force, the magnetic media and magnetic biofilm carriers gradually swirl downwards towards the inner side of the cylindrical body of the cyclone separator. However, after entering the external rotating magnetic system area outside the cylindrical body, they are further subjected to an external downward spiral magnetic force and move towards the inner wall, separating from the non-magnetic sludge on its surface. It exhibits good magnetic responsiveness and a relatively high specific gravity. The magnetic media or magnetic biofilm carrier is accelerated to move towards the outer wall of the cylindrical shell of the hydrocyclone separator and spirals downward into the lower conical structure of the hydrocyclone separator, where it accumulates and is discharged from the underflow outlet under the combined action of gravity and centrifugal force for recycling. Non-magnetic sludge particles and a small amount of weakly magnetic particles gather in the central area of ​​the hydrocyclone separator and overflow upward. After flowing out from the upper overflow outlet, they flow into the secondary sedimentation tank for sedimentation and separation, which can further recover smaller particles and weakly magnetic magnetic media or magnetic biofilm carriers. The remaining sludge and non-magnetic particles are discharged upward into the sludge thickening tank through overflow.

[0015] In some embodiments, the vertical magnetic cyclone sedimentation combination device has a tangential mud inlet pipe connected to the cylindrical body tangentially along an involute angle, and the cyclone direction inside the cyclone separator is consistent with the rotation direction of the rotating magnetic system.

[0016] In some embodiments, the vertical magnetic cyclone sedimentation assembly includes an outer cylinder within the secondary sedimentation tank. The rotating magnetic system comprises multiple layers of permanent magnets welded to the outer cylinder; these permanent magnets may specifically be neodymium iron boron permanent magnets. Further, the permanent magnets are arranged in a spiral downwards. Even further, the magnetic induction intensity of the permanent magnets gradually decreases from top to bottom; for example, the magnetic induction intensity of the upper permanent magnets may be 3500 Gs, and the magnetic induction intensity of the lower permanent magnets may be 2000 Gs. Optionally, the outer cylinder is connected to a geared motor via a gear bearing. Optionally, the rotational speed of the rotating magnetic system does not exceed 60 r / min.

[0017] In some embodiments, the vertical magnetic cyclone sedimentation assembly is equipped with a removable overflow cover at the overflow outlet.

[0018] In some preferred embodiments, the vertical magnetic cyclone sedimentation combined device has a distance of less than 3 mm between the cylindrical body and the rotating magnetic system to ensure the effective working distance of the rotating magnetic system.

[0019] In some embodiments, the secondary sedimentation tank of the vertical magnetic cyclone sedimentation combined device is conical.

[0020] In some embodiments, the vertical magnetic cyclone sedimentation unit is equipped with a sludge discharge valve at the bottom. When the sludge discharge valve is opened, it can discharge the weakly magnetic magnetic medium or magnetic biofilm carrier precipitated in the secondary sedimentation tank. Furthermore, the opening degree of the sludge discharge valve is adjustable.

[0021] In some embodiments, the vertical magnetic cyclone sedimentation assembly is equipped with a regulating valve at the underflow outlet, allowing magnetic particles to be discharged from the underflow outlet when the regulating valve is open. Furthermore, the opening degree of the regulating valve is adjustable.

[0022] In some embodiments, the inlet of the vertical magnetic cyclone sedimentation assembly is located at the top of the vertical magnetic cyclone sedimentation assembly.

[0023] In this invention, the separation efficiency of magnetic and non-magnetic media in the mud-water mixture can be controlled by the mud inlet flow rate, the regulating valve at the underflow outlet, and the opening degree of the mud discharge valve at the bottom of the secondary sedimentation tank.

[0024] In some embodiments, the vertical magnetic cyclone sedimentation combined device has an overflow weir at the top of the secondary sedimentation tank, and the overflow weir is connected to a drain outlet.

[0025] In some embodiments, the magnetic conductive component of the vertical magnetic cyclone sedimentation assembly is a magnetically conductive stainless steel strip.

[0026] Compared with the prior art, the advantages of this utility model are as follows:

[0027] 1) Based on the existing horizontal magnetic drum separator's magnetic system structure and hydrocyclone separation principle, this utility model introduces a vertical permanent magnet system with a downward spiral, providing a vertical magnetic cyclone sedimentation combination device that enables rapid and efficient separation and recovery of magnetic media and magnetic biofilm carriers under the combined action of centrifugal force, gravity, and downward spiral permanent magnet force. It has the advantages of low energy consumption and high recovery efficiency for weakly magnetic particles.

[0028] 2) After passing through the vertical magnetic cyclone sedimentation combined device, the magnetic media and magnetic biofilm carrier are endowed with residual magnetism under the action of the permanent magnet system. The residual magnetism can cause the magnetic media and magnetic biofilm carrier particles to spontaneously aggregate to form magnetic chain particles, which are rapidly separated and recovered under the action of magnetic force and gravity. Non-magnetic suspended solids and sludge flocs are discharged through the overflow of rising water flow. Compared with hydrocyclones, it has more precise selectivity and higher sorting efficiency.

[0029] 3) Traditional magnetic separation equipment (such as disk type, magnetic drum type, etc.) relies on scrapers to remove the adsorbed magnetic sludge, which easily leads to magnetic system wear and magnetic force attenuation, and has high maintenance costs. The vertical magnetic cyclone sedimentation combination device uses spiral downward magnetic lines of force to enrich magnetic particles under the action of gravity and centrifugal force and then discharge them through the underflow outlet, avoiding the insufficiency of magnetic media unloading through scrapers and avoiding equipment wear.

[0030] 4) The vertical magnetic cyclone sedimentation combined device generates centrifugal force through cyclone, which makes magnetic particles quickly enriched in the magnetic separation zone. A small amount of magnetic media or magnetic biofilm carrier overflowing from the top enters the conical sedimentation tank for secondary sedimentation and separation recovery. The secondary separation process improves the processing efficiency and increases the recovery efficiency of weakly magnetic particles. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of a magnetic media coagulation and sedimentation system and its process flow.

[0032] Figure 2 A schematic diagram of the process flow for a magnetic biofilm carrier-enhanced nitrogen and phosphorus removal system.

[0033] Figure 3 This is a schematic diagram of a vertical magnetic cyclone sedimentation combined device in a specific embodiment. Detailed Implementation

[0034] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0035] See Figure 3A vertical magnetic cyclone sedimentation combined device includes a conical secondary sedimentation tank and a cyclone separator disposed within the secondary sedimentation tank. The upper part of the cyclone separator is a cylindrical body, and the lower part is a conical structure 8. An underflow outlet is provided at the bottom of the conical structure 8, and a regulating valve 12 is provided at the underflow outlet. The opening degree of the regulating valve 12 is adjustable. A rotating magnetic system 5 that generates a downward spiral magnetic force is externally mounted on the cylindrical body. An outer cylinder is provided inside the secondary sedimentation tank. The rotating magnetic system consists of neodymium iron boron permanent magnets welded to the outer cylinder. The permanent magnets are arranged in a downward spiral, and the magnetic induction intensity of the permanent magnets gradually decreases from top to bottom. The magnetic induction intensity of the upper permanent magnets is 3500 Gs, and the magnetic induction intensity of the lower permanent magnets is 2000 Gs. The outer cylinder is connected to a geared motor 15 through a gear bearing 7. The rotation speed of the rotating magnetic system does not exceed 60 r / min. The distance between the cylindrical body and the rotating magnetic system is less than 3 mm. The inner wall of the cylindrical shell is equipped with a spiral magnetic guide 6 for magnetic focusing and flow stabilization. The magnetic guide 6 is a magnetically conductive stainless steel strip. A central overflow cylinder 3 is installed inside the cylindrical shell. The top of the central overflow cylinder 3 is equipped with an overflow outlet that connects to the secondary sedimentation tank. A removable overflow cover plate 4 is installed on the overflow outlet. A tangential sludge inlet pipe 2 is connected to the side of the cylindrical shell. The tangential sludge inlet pipe 2 is tangentially connected to the cylindrical shell along an involute angle. The swirling direction in the hydrocyclone separator is consistent with the rotation direction of the rotating magnetic system 5. The tangential sludge inlet pipe 2 is connected to the water inlet 1. The water inlet 1 is located at the top of the vertical magnetic cyclone sedimentation combination device. An overflow weir 10 is installed at the top of the secondary sedimentation tank, and the overflow weir 10 is connected to the drain outlet 14. A sludge discharge valve 13 is installed at the bottom of the secondary sedimentation tank. The opening of the sludge discharge valve 13 is adjustable. During use, the mud-water mixture enters the conical secondary sedimentation tank from the overflow outlet at the top of the built-in cyclone separator. After sedimentation, the supernatant flows upward through the annular water inlet 9, then through the overflow weir 10, and finally flows out through the drain outlet 14.

[0036] The above-mentioned vertical magnetic cyclone sedimentation combined device can be applied to magnetic media coagulation sedimentation systems and magnetic biofilm carrier-enhanced denitrification and phosphorus removal biochemical systems.

[0037] A magnetic media coagulation and sedimentation system, such as Figure 1 As shown, the effluent from the biochemical system of the wastewater treatment plant first enters the reaction tank where PAC is added to generate coagulated flocs. Then, magnetic media is added in the loading mixing tank to form magnetic flocs. Finally, PAM is added in the flocculation tank to further form large flocs encapsulating the magnetic media. After entering the sedimentation tank for sludge-water separation, the supernatant overflows and is discharged. The settled sludge is pumped into a vertical magnetic cyclone sedimentation unit to recover the magnetic media, which is then added back to the loading mixing tank for recycling.

[0038] A magnetic biofilm carrier enhances a nitrogen and phosphorus removal biochemical system, such as Figure 2As shown, the biochemical system includes anaerobic, anoxic, aerobic, post-anoxic zones and a secondary sedimentation tank. Magnetic biofilm carriers are added to the aerobic tank. Through carrier adsorption, biofilm growth, and nitrogen and phosphorus fixation, the activated sludge process's resistance to shock loads and its performance in synergistic degradation and removal of target pollutants are enhanced. The post-anoxic unit achieves denitrification in the post-anoxic zone. The sludge-water mixture enters the secondary sedimentation tank for sludge-water separation, and the supernatant is discharged. The settled sludge is pumped into a vertical magnetic cyclone sedimentation unit. The sludge containing the magnetic biofilm carrier slides spirally downwards along the inner wall of the built-in cyclone separator under the combined action of gravity, centrifugal force, and magnetic field. Utilizing the magnetic force gradient difference between the magnetic biofilm carrier and the biofilm, the non-magnetic biofilm on the surface of the magnetic carrier is separated. The magnetic biofilm carrier and magnetic sludge flocs enter the bottom outlet of the conical hopper under the action of gravity and the downward magnetic field force and flow into the aerobic tank for recycling. The remaining sludge is discharged into the sludge thickening and dewatering unit.

[0039] In summary, this utility model includes a tangential sludge inlet pipe, a built-in hydrocyclone separator, an external rotating magnetic system, and a conical secondary sedimentation tank. By introducing a downward spiral vertical permanent magnet system outside the built-in hydrocyclone separator, it provides a vertical magnetic hydrocyclone sedimentation combination device that enables rapid and efficient separation and recovery of magnetic media and magnetic biofilm carriers under the combined action of centrifugal force, gravity, and downward spiral permanent magnetic field force. It can be used for the recovery of magnetic media or magnetic biofilm carriers in magnetic coagulation sedimentation or magnetic biochemical systems. It has the advantages of low energy consumption and high recovery efficiency for weakly magnetic particles. Compared with hydrocyclones, it has more precise selectivity and higher sorting efficiency. The two-stage separation process improves the recovery efficiency of weakly magnetic particles.

[0040] This invention features a reasonable structural design, low energy consumption, and wide applicability, and has high efficiency in separating and recovering magnetic media and magnetic biofilm carriers.

[0041] Furthermore, it should be understood that after reading the above description of this utility model, those skilled in the art can make various alterations or modifications to this utility model, and these equivalent forms also fall within the scope defined by the appended claims.

Claims

1. A vertical magnetic cyclone sedimentation combined device, characterized in that, Includes a secondary sedimentation tank and a hydrocyclone separator installed inside the secondary sedimentation tank; The hydrocyclone separator has a cylindrical upper body and a conical lower body with an underflow outlet at the bottom. A rotating magnetic system composed of multiple layers of permanent magnets is mounted outside the cylindrical body to generate a downward spiral magnetic force. A spiral magnetic guide is welded to the inner wall of the cylindrical body for magnetic focusing and flow stabilization. A central overflow cylinder is installed inside the cylindrical body, with an overflow outlet at the top connecting to the secondary sedimentation tank. A tangential sludge inlet pipe is connected to the side of the cylindrical body, and this tangential sludge inlet pipe is connected to the water inlet. A drain outlet is installed at the top of the secondary sedimentation tank.

2. The vertical magnetic cyclone sedimentation combined device according to claim 1, characterized in that, The tangential mud inlet pipe is connected to the cylindrical body tangentially along the involute angle, and the swirling direction inside the hydrocyclone is consistent with the rotation direction of the rotating magnetic system.

3. The vertical magnetic cyclone sedimentation combined device according to claim 1, characterized in that, The secondary sedimentation tank is equipped with an outer cylinder. The rotating magnetic system consists of multiple layers of permanent magnets welded onto the outer cylinder. The permanent magnets are arranged in a spiral downwards, and the magnetic induction intensity of the permanent magnets gradually decreases from top to bottom. The outer cylinder is connected to a geared motor through a gear bearing. The rotation speed of the rotating magnetic system does not exceed 60 r / min.

4. The vertical magnetic cyclone sedimentation combined device according to claim 1, characterized in that, A removable overflow cover is installed at the overflow outlet.

5. The vertical magnetic cyclone sedimentation combined device according to claim 1, characterized in that, The distance between the cylindrical body and the rotating magnetic system is less than 3 mm.

6. The vertical magnetic cyclone sedimentation combined device according to claim 1, characterized in that, The secondary sedimentation tank is conical, with a sludge discharge valve at the bottom, and the opening of the sludge discharge valve is adjustable.

7. The vertical magnetic cyclone sedimentation combined device according to claim 1, characterized in that, A regulating valve is installed at the underflow outlet, and the opening degree of the regulating valve is adjustable.

8. The vertical magnetic cyclone sedimentation combined device according to claim 1, characterized in that, The water inlet is located at the top of the vertical magnetic vortex sedimentation combination device.

9. The vertical magnetic cyclone sedimentation combined device according to claim 1, characterized in that, An overflow weir is installed at the top of the secondary sedimentation tank, and the overflow weir is connected to the drain outlet.

10. The vertical magnetic cyclone sedimentation combined device according to claim 1, characterized in that, The magnetic conductor is a magnetically conductive stainless steel strip.

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