Magnetic separation enhanced sludge sorting system

Abstract

The magnetic separation enhanced sludge sorting system comprises a pretreatment assembly, a magnetic separation assembly, a multi-stage screening assembly and a post-treatment assembly which are sequentially communicated through pipelines, the magnetic separation assembly comprises a separation bin connected with the pretreatment assembly through a pipeline, a permanent magnet array is arranged at the bottom of the separation bin, a sliding frame is arranged at the top of the separation bin in the sludge conveying direction, and an adjustable magnetic field generator is arranged on the sliding frame in a sliding mode; the multi-stage screening assembly comprises a screening bin connected with the sorting bin through a pipeline, and a multi-stage screen assembly is arranged in the screening bin. The post-treatment assembly comprises a chemical reaction tank and a solid-liquid separation device, and the chemical reaction tank is connected with the screening bin through a pipeline. By arranging the magnetic separation assembly, magnetic substances in sludge can be efficiently separated, meanwhile, through the multi-stage screening assembly and the post-treatment assembly, the multi-stage screening and chemical treatment processes are combined, and the sludge sorting precision and the resource recovery rate are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of sludge treatment and resource recycling technology, and in particular to a sludge sorting system enhanced by magnetic separation. Background Technology

[0002] Sludge treatment is a process of reducing, stabilizing, and rendering harmless sludge through methods such as concentration, conditioning, dewatering, stabilization, drying, or incineration. Sludge sorting is a preliminary stage for the above processing steps, and therefore, the effectiveness of sorting directly determines the results of sludge concentration, conditioning, dewatering, stabilization, drying, or incineration.

[0003] Existing technologies simply filter sludge to remove larger particles and ensure continuous processing, but they cannot finely break down the sludge, and in particular, the magnetic substances present in the sludge cannot be effectively recycled. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the technical problems in the related art.

[0005] To achieve the above objectives, the present invention proposes a magnetically enhanced sludge sorting system, comprising a pretreatment component, a magnetic separation component, a multi-stage screening component, and a post-treatment component connected in sequence by pipelines. The magnetic sorting assembly includes a sorting chamber connected to the pretreatment assembly via a pipeline. A permanent magnet array is provided at the bottom of the sorting chamber, and a sliding frame is provided at the top of the sorting chamber along the sludge conveying direction. An adjustable magnetic field generator is slidably mounted on the sliding frame. The multi-stage screening assembly includes a screening chamber connected to the sorting chamber pipeline, and the screening chamber is equipped with a multi-stage screen assembly; The post-processing assembly includes a chemical reaction tank and a solid-liquid separation device, wherein the chemical reaction tank is connected to the screening chamber via a pipeline.

[0006] This invention enables efficient separation of magnetic materials in sludge by setting up a magnetic separation component. At the same time, by using multi-stage screening components and post-processing components, combined with multi-stage screening and chemical treatment processes, it significantly improves the accuracy of sludge sorting and the resource recovery rate.

[0007] Optionally, the pretreatment component includes a pretreatment chamber, a feed inlet is provided at the top of the pretreatment chamber, a crossbeam is provided at the feed inlet, an outer stirring blade is rotatably provided on the crossbeam, a motor chamber is provided below the crossbeam, and a first motor is provided inside the motor chamber; The pretreatment chamber has a rotating column that is rotatably mounted perpendicular to the inner bottom wall. The rotating column is equipped with multiple sets of inner layer cutting blades. A second motor for controlling the rotation of the rotating column is located at the bottom of the pretreatment chamber.

[0008] Furthermore, the rotational speed of the outer stirring blade is 30-60 revolutions per minute, and the rotational speed of the inner cutting blade is 120-180 revolutions per minute.

[0009] Furthermore, the inlet of the pipe connecting the screening chamber and the magnetic separation component is the feed inlet of the screening chamber, and the inlet of the pipe connecting the screening chamber and the chemical reaction tank is the discharge outlet of the screening chamber. The height of the feed inlet is higher than the height of the discharge outlet. The multi-stage screen assembly includes a coarse screen layer and a fine screen layer arranged from top to bottom. The feed inlet is located above the coarse screen layer, and the discharge outlet is located below the fine screen layer.

[0010] Furthermore, a cyclone separation chamber is provided in the screening chamber below the fine screen layer. A spiral guide plate is fixedly provided on the bottom wall of the cyclone separation chamber. The axis of the spiral guide plate is perpendicular to the fine screen layer and the bottom wall of the screening chamber. The pitch of the spiral guide plate gradually decreases from top to bottom. The discharge port of the screening chamber is located on the side wall of the cyclone separation chamber.

[0011] Furthermore, the diameter of the sieve holes in the coarse sieve layer is 5-10 mm, and the diameter of the sieve holes in the fine sieve layer is 1-3 mm.

[0012] Furthermore, the chemical reaction tank is equipped with multiple sets of stirring paddles, the blades of which are arc-shaped. A heating coil is installed at the bottom of the chemical reaction tank, and the heating coil is connected to an external heat source through a temperature control device. The solid-liquid separation device is a horizontal spiral sedimentation centrifuge with a drum diameter of 300-500 mm and a rotation speed range of 2000-3000 rpm.

[0013] Furthermore, a roller bearing is provided at the sliding connection position between the adjustable magnetic field generator and the sliding frame, and the roller bearing is in rolling contact with the surface of the sliding frame.

[0014] Furthermore, limit blocks are detachably provided at both ends of the sliding frame.

[0015] Furthermore, the permanent magnet array is composed of multiple neodymium iron boron magnets, with a spacing of 5-10 mm between adjacent magnets. The adjustable magnetic field generator is powered by a DC power supply, and its magnetic field strength can be adjusted from 0.2 to 0.8 Tesla.

[0016] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 This is a schematic diagram of the overall structure of a magnetically enhanced sludge sorting system according to the present invention. Figure 2 This is a schematic diagram of the internal structure of a magnetically enhanced sludge sorting system according to the present invention; Figure 3 This is a schematic diagram of the internal structure of the pretreatment component of a magnetically enhanced sludge sorting system according to the present invention. Figure 4 This is a schematic diagram of the internal structure of a magnetic sorting component according to another embodiment of a magnetically enhanced sludge sorting system of the present invention; Figure 5 This is a schematic diagram of the internal structure of a multi-stage screening component in a magnetically enhanced sludge sorting system according to the present invention. Figure 6 This is a schematic diagram of the overall structure of the post-processing component of a magnetically enhanced sludge sorting system according to the present invention. Figure 7 This is a schematic diagram of the structure of an automatic cleaning device in another embodiment of a magnetically enhanced sludge sorting system according to the present invention.

[0018] Explanation of reference numerals in the attached figures: 1. Pretreatment Components; 10. Pretreatment Chamber; 11. Outer Agitator Blades; 12. Inner Cutting Blades; 13. Motor Chamber; 14. First Motor; 15. Second Motor; 16. Crossbeam; 17. Rotating Column; 2. Magnetic Separation Components; 20. Separation Chamber; 21. Permanent Magnet Array; 22. Adjustable Magnetic Field Generator; 23. Sliding Frame; 24. Limiting Block; 25. Protective Cover; 26. Observation Window; 27. Ball Bearing; 3. Multi-stage Screening Components; 30. Screening Chamber; 31. Coarse Screen Layer; 32. Fine Screen Layer; 33. Cyclone Separation Chamber; 34. Spiral Guide Plate; 35. Flow Control Valve; 36. Elastic Connector; 4. Post-treatment Components; 40. Chemical Reaction Tank; 41. Agitator; 42. Heating Coil; 43. Solid-Liquid Separation Device; 44. Spray Head; 45. High-Pressure Water Pump; 46. Slag Discharge Port. Detailed Implementation

[0019] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0020] This invention proposes a magnetically enhanced sludge sorting system, as described below. Figures 1 to 7 Please provide a detailed explanation.

[0021] A magnetically enhanced sludge sorting system, referring to Figures 1 to 2 It includes a pretreatment component 1, a magnetic separation component 2, a multi-stage screening component 3, and a post-treatment component 4, which are connected in sequence by pipes. The magnetic sorting assembly 2 includes a sorting chamber 20 connected to the pretreatment assembly 1 via a pipeline. A permanent magnet array 21 is provided at the bottom of the sorting chamber 20, and a sliding frame 23 is provided at the top of the sorting chamber 20 along the sludge conveying direction. An adjustable magnetic field generator 22 is slidably mounted on the sliding frame 23. The multi-stage screening assembly 3 includes a screening chamber 30 connected to the sorting chamber 20 by a pipe, and the screening chamber 30 is equipped with a multi-stage screen assembly; The post-processing component 4 includes a chemical reaction tank 40 and a solid-liquid separation device 43, with the chemical reaction tank 40 piped to the screening chamber 30.

[0022] Specifically, during sludge sorting, workers first transport the sludge to the pretreatment component 1 to disperse and break it up, preventing large pieces of sludge from entering the pipes and causing blockages. The broken sludge then enters the sorting chamber 20 of the magnetic sorting component 2. In the sorting chamber 20, under the combined action of the permanent magnet array 21 and the adjustable magnetic field generator 22, magnetic materials are separated from the sludge. After the magnetic materials are separated, the sludge enters the screening chamber 30. Under the action of the multi-stage screening mesh component, the sludge is filtered and screened multiple times, removing materials of different particle sizes. The screened sludge then enters the chemical reaction tank 40 from the screening chamber 30 for chemical treatment. After the chemical treatment, the sludge enters the solid-liquid separation device 43 for solid-liquid separation, thus completing the entire sludge sorting operation. This invention enables efficient separation of magnetic materials in sludge by setting up a magnetic separation component 2. At the same time, by using a multi-stage screening component 3 and a post-processing component 4, combined with multi-stage screening and chemical treatment processes, the accuracy of sludge sorting and resource recovery rate are significantly improved.

[0023] In some embodiments, refer to Figure 2 ,and Figure 3 The pretreatment component 1 includes a pretreatment chamber 10, a feed inlet is provided at the top of the pretreatment chamber 10, a crossbeam 16 is provided at the feed inlet, an outer stirring blade 11 is rotatably provided on the crossbeam 16, a motor chamber 13 is provided below the crossbeam 16, and a first motor 14 is provided inside the motor chamber 13. A rotating column 17 is rotatably mounted perpendicular to the inner bottom wall inside the pretreatment chamber 10. Multiple sets of inner layer cutting blades 12 are mounted on the rotating column 17. A second motor 15 for controlling the rotation of the rotating column 17 is mounted at the bottom of the pretreatment chamber 10.

[0024] Specifically, the outer stirring blade 11 is used to evenly disperse the sludge, and the inner cutting blade 12 is used to break up large impurities in the sludge. Both the outer stirring blade 11 and the inner cutting blade 12 are made of stainless steel. The surface of the outer stirring blade 11 is coated with a wear-resistant coating, and the cutting edge of the inner cutting blade 12 is hardened to improve its wear resistance and service life. Furthermore, the rotational speed range of the outer stirring blade 11 is 30-60 revolutions per minute, and the rotational speed range of the inner cutting blade 12 is 120-180 revolutions per minute. The first motor 14 and the second motor 15 are both stepper motors, and both are electrically connected to the same controller. Operators can control the rotational speeds of both motors through the same controller, thereby controlling the rotational speeds of the outer stirring blade 11 and the inner cutting blade 12.

[0025] When the raw sludge enters the pretreatment component 1, the outer stirring blades 11 rotate at a speed of 30-60 revolutions per minute, uniformly dispersing the sludge and forming a fluid mixture. Simultaneously, the inner cutting blades 12 operate at a high speed of 120-180 revolutions per minute, breaking up large impurities in the sludge. Because the outer stirring blades 11 are coated with a wear-resistant coating and the inner cutting blades 12 are hardened, both exhibit excellent durability and can meet long-term operational requirements. The pretreated sludge is then transported through pipelines to the magnetic separation unit, providing the necessary conditions for subsequent separation.

[0026] In some embodiments, refer to Figure 4 Above the permanent magnet array 21 of the magnetic sorting component 2, there is a protective cover 25. The protective cover 25 is made of non-magnetic material. The top of the protective cover 25 is provided with an observation window 26, which is made of transparent plexiglass, so that the operator can observe the condition of the permanent magnet array 21 during maintenance.

[0027] In some embodiments, refer to Figure 2 and Figure 5 The pipe opening connecting the screening chamber 30 and the magnetic separation component 2 is the feed inlet of the screening chamber 30, and the pipe opening connecting the screening chamber 30 and the chemical reaction tank 40 is the discharge outlet of the screening chamber 30. The height of the feed inlet is higher than the height of the discharge outlet, ensuring that there is enough space for the multi-stage screen components to be arranged. The multi-stage screen assembly includes a coarse screen layer 31 and a fine screen layer 32 arranged from top to bottom. The coarse screen layer 31 has a screen aperture diameter of 5-10 mm and is used to remove larger particles of impurities from the sludge. The fine screen layer 32 has a screen aperture diameter of 1-3 mm and is used to separate smaller sludge particles. Through two screening and filtration processes using the coarse screen layer 31 and the fine screen layer 32, impurities of different particle sizes are filtered from the sludge. Both the coarse screen layer 31 and the fine screen layer 32 are detachable. When the filtered impurities accumulate too much or the corresponding screen needs to be replaced, the operator can remove the coarse screen layer 31 or the fine screen layer 32 to replace the corresponding screen or collect the filtered impurities. The coarse screen layer 31 and the fine screen layer 32 are fixed together by an elastic connector 36. The elastic connector 36 allows the fine screen layer to make a small displacement relative to the coarse screen layer during vibration, thereby preventing the screen holes from clogging. In one embodiment, the elastic connector 36 is set as a spring. The feed inlet is located above the coarse screen layer 31, and the discharge outlet is located below the fine screen layer 32, ensuring that the sludge can be filtered by the coarse screen layer 31 and the fine screen layer 32 along the transport direction.

[0028] In some embodiments, refer to Figure 2 and Figure 5 A cyclone separation chamber 33 is provided in the screening chamber 30 below the fine screen layer 32. A spiral guide plate 34 is fixedly provided on the bottom wall of the cyclone separation chamber 33. The axis of the spiral guide plate 34 is perpendicular to the fine screen layer 32 and the bottom wall of the screening chamber 30. The pitch of the spiral guide plate 34 gradually decreases from top to bottom to enhance the centrifugal separation effect of sludge particles. The discharge port of the screening chamber 30 is located on the side wall of the cyclone separation chamber 33, and a flow regulating valve 35 is provided at the discharge port of the screening chamber 30. The operator can adjust the sludge throughput by controlling the flow regulating valve 35 to meet the needs of different working conditions.

[0029] In some embodiments, refer to Figure 6 The chemical reaction tank 40 is equipped with multiple sets of stirring paddles 41. The stirring paddles 41 can be configured as straight plates or curved plates. Compared with straight plates, curved plates can increase the contact area between sludge and chemical reagents. A heating coil 42 is installed at the bottom of the chemical reaction tank 40. The heating coil 42 is connected to an external heat source through a temperature control device to maintain the temperature inside the reaction tank between 40-60°C, ensuring the smooth progress of the chemical reaction.

[0030] The solid-liquid separation device 43 adopts a horizontal spiral sedimentation centrifuge with a drum diameter of 300-500 mm and a rotation speed range of 2000-3000 rpm. It is used to achieve efficient separation of solids and liquids in sludge, further optimizing the resource utilization effect of sludge.

[0031] In one embodiment, reference is made to Figure 7 An automatic cleaning device is installed at the slag discharge port 46 of the solid-liquid separation device 43. The automatic cleaning device includes a spray head 44 and a high-pressure water pump 45. The spray head 44 is connected to the high-pressure water pump 45 through a pipe. The inlet of the high-pressure water pump 45 is connected to an external water source. The nozzle of the spray head 44 faces the slag discharge port 46 of the solid-liquid separation device 43 to remove the sludge particles remaining on the inner wall of the slag discharge port 46 and avoid equipment blockage.

[0032] In some embodiments, refer to Figure 2 and Figure 3 A roller bearing is provided at the sliding connection position between the adjustable magnetic field generator 22 and the sliding frame 23, and the roller bearing is in rolling contact with the surface of the sliding frame 23. The roller bearing can act as a pulley to reduce the friction between the adjustable magnetic field generator 22 and the sliding frame 23, and facilitate the movement of the adjustable magnetic field generator 22.

[0033] In some embodiments, refer to Figure 2 and Figure 3 Limit blocks 24 are detachably installed at both ends of the sliding frame 23. This prevents the adjustable magnetic field generator 22 from detaching from the sliding frame 23.

[0034] In some embodiments, refer to Figure 2 and Figure 3 The permanent magnet array 21 is composed of multiple neodymium iron boron magnets with a spacing of 5-10 mm between adjacent magnets, forming a uniform magnetic field distribution. The adjustable magnetic field generator 22 is powered by a DC power supply, and its magnetic field strength can be adjusted from 0.2 to 0.8 Tesla, which allows operators to dynamically adjust the magnetic field strength of the adjustable magnetic field generator 22 according to the content and properties of magnetic materials in the sludge.

[0035] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0037] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0039] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0040] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A magnetically enhanced sludge sorting system, characterized in that, It includes a pretreatment component, a magnetic separation component, a multi-stage screening component, and a post-treatment component connected in sequence by pipes; The magnetic sorting assembly includes a sorting chamber connected to the pretreatment assembly via a pipeline. A permanent magnet array is provided at the bottom of the sorting chamber, and a sliding frame is provided at the top of the sorting chamber along the sludge conveying direction. An adjustable magnetic field generator is slidably mounted on the sliding frame. The multi-stage screening assembly includes a screening chamber connected to the sorting chamber pipeline, and the screening chamber is equipped with a multi-stage screen assembly; The post-processing assembly includes a chemical reaction tank and a solid-liquid separation device, wherein the chemical reaction tank is connected to the screening chamber via a pipeline.

2. The magnetically enhanced sludge sorting system as described in claim 1, characterized in that, The pretreatment component includes a pretreatment chamber, a feed inlet is provided at the top of the pretreatment chamber, a crossbeam is provided at the feed inlet, an outer stirring blade is rotatably provided on the crossbeam, a motor chamber is provided below the crossbeam, and a first motor is provided in the motor chamber; The pretreatment chamber has a rotating column that is rotatably mounted perpendicular to the inner bottom wall. The rotating column is equipped with multiple sets of inner layer cutting blades. A second motor for controlling the rotation of the rotating column is located at the bottom of the pretreatment chamber.

3. The magnetically enhanced sludge sorting system as described in claim 2, characterized in that, The outer stirring blade has a rotational speed range of 30-60 revolutions per minute, and the inner cutting blade has a rotational speed range of 120-180 revolutions per minute.

4. The magnetically enhanced sludge sorting system as described in claim 1, characterized in that, The inlet of the pipe connecting the screening chamber and the magnetic separation component is the feed inlet of the screening chamber, and the inlet of the pipe connecting the screening chamber and the chemical reaction tank is the discharge outlet of the screening chamber. The height of the feed inlet is higher than the height of the discharge outlet. The multi-stage screen assembly includes a coarse screen layer and a fine screen layer arranged from top to bottom. The feed inlet is located above the coarse screen layer, and the discharge outlet is located below the fine screen layer.

5. The magnetically enhanced sludge sorting system as described in claim 4, characterized in that, A cyclone separation chamber is provided below the fine screen layer in the screening chamber. A spiral guide plate is fixedly provided on the bottom wall of the cyclone separation chamber. The axis of the spiral guide plate is perpendicular to the fine screen layer and the bottom wall of the screening chamber. The pitch of the spiral guide plate gradually decreases from top to bottom. The discharge port of the screening chamber is located on the side wall of the cyclone separation chamber.

6. The magnetically enhanced sludge sorting system as described in claim 5, characterized in that, The coarse screen layer has a screen aperture diameter of 5-10 mm, and the fine screen layer has a screen aperture diameter of 1-3 mm.

7. The magnetically enhanced sludge sorting system as described in claim 1, characterized in that, The chemical reaction tank is equipped with multiple sets of stirring paddles, the blades of which are arc-shaped. A heating coil is installed at the bottom of the chemical reaction tank, and the heating coil is connected to an external heat source through a temperature control device. The solid-liquid separation device is a horizontal spiral sedimentation centrifuge with a drum diameter of 300-500 mm and a rotation speed range of 2000-3000 rpm.

8. The magnetically enhanced sludge sorting system as described in claim 1, characterized in that, A roller bearing is provided at the sliding connection position between the adjustable magnetic field generator and the sliding frame, and the roller bearing is in rolling contact with the surface of the sliding frame.

9. A magnetically enhanced sludge sorting system as described in claim 1, characterized in that, Limiting blocks can be detachably installed at both ends of the sliding frame.

10. A magnetically enhanced sludge sorting system as described in claim 1, characterized in that, The permanent magnet array consists of multiple neodymium iron boron magnets with a spacing of 5-10 mm between adjacent magnets. The adjustable magnetic field generator is powered by a DC power supply and its magnetic field strength can be adjusted from 0.2 to 0.8 Tesla.

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