Sludge thickening and dewatering equipment based on synergistic effect of electric field and swirling flow field

Abstract

The invention provides sludge thickening and dewatering equipment based on the synergistic effect of an electric field and a rotational flow field, and relates to the technical field of sludge treatment. The device comprises a vertical tank body, an electric field pretreatment structure, an electric field rotational flow dehydration structure and a high-voltage power supply, the electric field pretreatment structure is located on the outer side of the vertical tank body, an outlet of the electric field pretreatment structure is communicated with the vertical tank body, and the electric field pretreatment structure is tangent to the side wall of the vertical tank body; the electric field rotational flow dehydration structure is mounted in the vertical tank body; the electric field pretreatment structure and the electric field rotational flow dehydration structure are electrically connected with the high-voltage power supply; sludge is pretreated through a high-frequency high-voltage alternating-current electric field generated by the electric field pretreatment structure and then enters the vertical tank body in a rotational flow mode, and the high-frequency high-voltage alternating-current electric field generated by the electric field rotational flow dehydration structure conducts secondary treatment on the sludge entering the vertical tank body.

Description

Technical Field

[0001] The present invention relates to the technical field of sludge treatment, in particular to sludge concentration and dehydration equipment based on the synergistic effect of electric field and cyclonic field. Background Art

[0002] In recent years, with the continuous increase in sewage treatment volume, sludge production has also increased. To alleviate the treatment pressure caused by sludge production, an efficient sludge concentration technology is urgently needed. Sludge is a byproduct of sewage treatment and may contain a large amount of toxic and hazardous substances. It must be reduced, rendered harmless, and stabilized before discharge. The typical sludge treatment process includes: sludge concentration, sludge digestion, dehydration and drying, and sludge disposal. Sludge disposal has certain requirements for sludge moisture content. In order to promptly treat toxic and hazardous substances and utilize beneficial substances, sludge must be concentrated and dehydrated to reduce the sludge organic matter content and moisture content, reduce the sludge disposal volume, and facilitate transportation and disposal. Therefore, sludge concentration and dehydration is a key way to reduce sludge volume, achieve sludge reduction, harmlessness, and stabilization, and it is also a key link that affects the efficiency and cost of subsequent digestion and disposal.

[0003] Currently, sludge thickening and dewatering primarily relies on gravity settling, which suffers from long processing times, low efficiency, and large footprint. Horizontal spiral thickening filters, while highly efficient, suffer from poor operational stability and high costs. Both gravity settling and centrifugal separation can only separate free water and some interstitial water from the sludge, but not bound water. Therefore, how to further remove bound water from the sludge while maintaining a small footprint and high concentration and dehydration efficiency is a pressing challenge for sludge thickening and dewatering equipment. Summary of the Invention

[0004] The purpose of the present invention is to provide a sludge concentration and dewatering device based on the synergistic effect of electric field and cyclone field. The various technical effects that can be produced by the preferred technical solution among the many technical solutions provided by the present invention are described in detail below.

[0005] To achieve the above objectives, the present invention provides the following technical solutions: The present invention provides a sludge concentration and dehydration device based on the synergistic effect of an electric field and a cyclone field, comprising a vertical tank body, an electric field pretreatment structure, an electric field cyclone dehydration structure, and a high-voltage power supply, wherein the electric field pretreatment structure is located outside the vertical tank body, the outlet of the electric field pretreatment structure is connected to the vertical tank body and the electric field pretreatment structure is tangent to the side wall of the vertical tank body, the electric field cyclone dehydration structure is installed inside the vertical tank body, and both the electric field pretreatment structure and the electric field cyclone dehydration structure are electrically connected to the high-voltage power supply; The sludge is first pretreated by the high-frequency and high-voltage AC electric field generated by the electric field pretreatment structure, and then enters the vertical tank body in a cyclone manner. The high-frequency and high-voltage AC electric field generated by the electric field cyclone dehydration structure performs secondary treatment on the sludge entering the vertical tank body.

[0006] Optionally, the electric field pretreatment structure includes a cylindrical insulated electrode, a metal tube and an electrode bracket, the cylindrical insulated electrode is fixed in the metal tube by the electrode bracket, the central axes of the cylindrical insulated electrode and the metal tube coincide with each other, one end of the cylindrical insulated electrode is connected to the positive pole of the high-voltage power supply, the metal tube is connected to the negative pole of the high-voltage power supply, and a pretreatment channel exists between the cylindrical insulated electrode and the metal tube, and a high-frequency high-voltage alternating current electric field is generated in the pretreatment channel.

[0007] Optionally, the electric field pretreatment structure also includes an inlet pipe, an insulating elbow and a tangential pipe, the inlet pipe, the insulating elbow, the metal round pipe and the tangential pipe are connected in sequence through flanges, one end of the cylindrical insulated electrode passes through the side wall of the insulating elbow and is connected to the positive pole of the high-voltage power supply, the tangential pipe is connected to the lower end part of the vertical tank body and the tangential pipe is tangent to the side wall of the vertical tank body.

[0008] Optionally, a first insulating layer is provided on the outer surface of the cylindrical insulating electrode, and the thickness of the first insulating layer is 0.5 to 1.5 mm.

[0009] Optionally, the first insulating layer is formed by spraying aluminum oxide on the outer surface of the cylindrical insulating electrode, or wrapping the outer surface of the cylindrical insulating electrode with epoxy resin by casting.

[0010] Optionally, the electric field cyclone dehydration structure includes a space electrode assembly, a vortex breaker and a water-isolating weir plate. The space electrode assembly, the vortex breaker and the water-isolating weir plate are installed in the vertical tank body from bottom to top in sequence, and the space electrode assembly is electrically connected to the high-voltage power supply.

[0011] Optionally, the space electrode assembly includes a connecting tube, a metal spiral blade, an insulating spiral blade and a fixed bracket, the metal spiral blade is fixedly wound on the outer wall of the connecting tube in a spiral direction, the insulating spiral blade is fixedly wound on the outer wall of the connecting tube in a spiral direction, the number of the metal spiral blades and the insulating spiral blades are both multiple, the metal spiral blades and the insulating spiral blades are arranged at intervals, the insulating spiral blades are connected to the positive pole of the high-voltage power supply, the metal spiral blades are connected to the negative pole of the high-voltage power supply, and the outer wall of the connecting tube is connected to the inner wall of the vertical tank body through the fixed bracket.

[0012] Optionally, a second insulating layer is provided on the outer surface of the insulating spiral blade, and the thickness of the second insulating layer is 2 to 4 mm.

[0013] Optionally, the vortex-breaking member includes a fixed cylinder and vortex-breaking blades, and there are multiple vortex-breaking blades, all of which are distributed along the circumferential direction of the fixed cylinder, and the two ends of the vortex-breaking blades are respectively connected to the outer wall of the fixed cylinder and the inner wall of the vertical tank body.

[0014] Optionally, a mud discharge pipe is provided at the bottom of the vertical tank body, an exhaust pipe is provided at the top of the vertical tank body, and a water outlet pipe is provided on the upper side wall of the vertical tank body; The water-blocking weir plate includes an overflow cylinder and an annular plate. The lower end of the overflow cylinder is connected to the inner wall of the vertical tank body through the annular plate. The height of the annular plate is lower than the bottom end height of the water outlet pipe, and the height of the upper end surface of the overflow cylinder is higher than the top end height of the water outlet pipe.

[0015] The present invention provides a sludge concentration and dewatering equipment based on the synergistic effect of an electric field and a cyclonic flow field. The equipment adopts a vertical and compact structure, occupies a small area, and is easy to transport and install. The electric field pretreatment structure and the electric field cyclonic flow dewatering structure are integrated into a vertical tank. The sludge is first pretreated by the high-frequency, high-voltage AC electric field generated by the electric field pretreatment structure. That is, under the action of the electric field, the cells in the sludge particles are ruptured, releasing the bound water inside them to improve the sludge fluidity. The sludge then enters the vertical tank in a cyclonic manner. The high-frequency, high-voltage AC electric field generated by the electric field cyclonic flow dewatering structure performs a secondary treatment on the sludge entering the vertical tank. Under the action of the electric field, the small-sized bound water particles in the sludge are aggregated into large droplets for deep dehydration. At the same time, the centrifugal force of the cyclonic flow and the principle of shallow sedimentation are utilized to accelerate the separation of the sludge and the water phase, enhance the sludge dewatering effect, reduce the processing time, and have higher concentration and dehydration efficiency. The equipment achieves both sludge cell wall breaking and concentration and dehydration, and has the characteristics of small footprint and high dehydration efficiency. It is particularly suitable for urban sewage treatment plants. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 Schematic diagram of the structure of a sludge concentration and dehydration device based on the synergistic effect of an electric field and a cyclonic flow field provided in an embodiment of the present invention; Figure 2Schematic diagram of the structure of a cylindrical insulated electrode of a sludge concentration and dehydration device based on the synergistic effect of an electric field and a cyclonic field provided in an embodiment of the present invention; Figure 3 Schematic diagram of the structure of the space electrode assembly of the sludge concentration and dehydration equipment based on the synergistic effect of the electric field and the cyclonic field provided in an embodiment of the present invention; Figure 4 It is a structural schematic diagram of the vortex breaking component of the sludge concentration and dewatering equipment based on the synergistic effect of the electric field and the cyclonic field provided by an embodiment of the present invention.

[0018] In the figure, 1 is the inlet pipe; 2 is the cylindrical insulated electrode; 3 is the insulated bent pipe; 4 is the electric field pretreatment structure; 5 is the metal circular pipe; 6 is the tangential pipe; 7 is the electric field cyclone dehydration structure; 8 is the space electrode assembly; 9 is the vortex breaking part; 10 is the water-blocking weir plate; 11 is the exhaust pipe; 12 is the water outlet pipe; 13 is the mud discharge pipe; 14 is the electrode bracket; 15 is the fixed bracket; 16 is the metal spiral blade; 17 is the insulated spiral blade; 18 is the vortex breaking blade; 19 is the connecting tube; 20 is the fixed tube. DETAILED DESCRIPTION

[0019] To make the objectives, technical solutions, and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without inventive effort are within the scope of protection of the present invention.

[0020] In the description of the present invention, it should be noted that, unless otherwise specified, the term "plurality" means two or more. Terms such as "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," and "tail" are used to indicate positions or relationships based on those shown in the accompanying drawings. These terms are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, terms such as "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in the present invention depending on the specific circumstances.

[0022] Electric field dehydration technology uses a high-frequency electric field to weaken the interfacial film strength of water droplets, promoting droplet aggregation and increasing particle size, thereby accelerating sludge settling. Furthermore, the instantaneous, high-intensity electric field acts on the microbial cell membranes in the sludge, creating a transmembrane potential difference. When this potential difference exceeds a critical value, it triggers membrane rupture or the formation of nanoscale pores, releasing intracellular organic matter and bound water to the extracellular space. This process effectively destroys the extracellular polymeric substances (EPS) in the sludge, reducing its hydrophilicity and, consequently, the bound water content.

[0023] The present invention provides a sludge thickening and dehydration device based on the synergistic effect of an electric field and a cyclone field, characterized in that it includes a vertical tank body, an electric field pretreatment structure 4, an electric field cyclone dehydration structure 7 and a high-voltage power supply, wherein the electric field pretreatment structure 4 is located outside the vertical tank body, the outlet of the electric field pretreatment structure 4 is connected to the vertical tank body and the electric field pretreatment structure 4 is tangent to the side wall of the vertical tank body, the electric field cyclone dehydration structure 7 is installed inside the vertical tank body, and the electric field pretreatment structure 4 and the electric field cyclone dehydration structure 7 are both electrically connected to the high-voltage power supply; The sludge is first pretreated by the high-frequency and high-voltage AC electric field generated by the electric field pretreatment structure 4, and then enters the vertical tank body in a cyclone manner. The high-frequency and high-voltage AC electric field generated by the electric field cyclone dehydration structure 7 performs secondary treatment on the sludge entering the vertical tank body. The present invention provides a sludge thickening and dewatering equipment based on the synergistic effect of electric field and cyclone field. The equipment adopts a vertical compact structure, occupies a small area and is easy to transport and install. The electric field pretreatment structure 4 and the electric field cyclone dewatering structure 7 are integrated on the vertical tank body. The sludge is first pretreated by the high-frequency and high-voltage alternating current electric field generated by the electric field pretreatment structure 4, that is, under the action of the electric field, the cells in the sludge particles are broken and the bound water inside is released to improve the fluidity of the sludge. The sludge then enters the vertical tank body in the form of a cyclone. The high-frequency and high-voltage alternating current electric field generated by the electric field cyclone dewatering structure 7 performs secondary treatment on the sludge entering the vertical tank body. Under the action of the electric field, the small-sized bound water in the sludge is aggregated into large water droplets for deep dehydration. At the same time, the separation of the sludge and the water phase is accelerated by utilizing the centrifugal force of the cyclone and the principle of shallow sedimentation, thereby enhancing the sludge dewatering effect and reducing the processing time. The equipment has higher concentration and dehydration efficiency, realizes the wall breaking and concentration and dehydration of the sludge, and has the characteristics of small area occupation and high dehydration efficiency.

[0024] As an optional embodiment, the electric field pretreatment structure 4 includes a cylindrical insulated electrode 2, a metal tube 5 and an electrode holder 14. The cylindrical insulated electrode 2 is fixed in the metal tube 5 by the electrode holder 14. The electrode holder 14 is used to support the cylindrical insulated electrode 2 so that the central axes of the cylindrical insulated electrode 2 and the metal tube 5 coincide with each other. The number of electrode holders 14 is at least two. One end of the cylindrical insulated electrode 2 is connected to the positive pole of the high-voltage power supply, and the metal tube 5 is connected to the negative pole of the high-voltage power supply. A pretreatment channel is present between the cylindrical insulated electrode 2 and the metal tube 5. A high-frequency, high-voltage AC electric field is generated in the pretreatment channel, that is, a non-uniform high-frequency, high-voltage AC electric field is generated. The high-voltage power supply can be a high-frequency, high-voltage pulsed AC power supply with a voltage of 0-30kV, a frequency of 50-5000Hz, a duty cycle of 0-30%, and a square wave waveform. The optimal frequency, voltage, and duty cycle applied need to be screened based on the specific physical and chemical properties of the sludge.

[0025] As an optional embodiment, the electric field pretreatment structure 4 also includes an inlet pipe 1, an insulating elbow 3, and a tangential pipe 6. The insulating elbow 3 is a curved structure made of an insulating material such as polytetrafluoroethylene. The inlet pipe 1, insulating elbow 3, metal round pipe 5, and tangential pipe 6 are sequentially connected by flanges for easy assembly and disassembly. The length of the cylindrical insulating electrode 2 and the metal round pipe 5 can be adjusted according to the actual sludge treatment volume on site, thereby changing the range of the high-frequency, high-voltage AC electric field. One end of the cylindrical insulating electrode 2 extends through the side wall of the insulating elbow 3 and is connected to the positive electrode of the high-voltage power supply. The tangential pipe 6 is connected to the lower end of the vertical tank body and is tangential to the side wall of the vertical tank body. The sludge pretreated by the high-frequency, high-voltage AC electric field enters the vertical tank body through the tangential pipe 6 in a swirling manner. The inlet pipe 1 is connected to the sludge tank via a pipeline and a pump body, so that the sludge in the sludge tank is transported into the inlet pipe 1.

[0026] As an optional embodiment, a first insulating layer is provided on the outer surface of the cylindrical insulated electrode 2. The thickness of the first insulating layer is 0.5 to 1.5 mm. The first insulating layer is formed by spraying alumina on the outer surface of the cylindrical insulated electrode 2 or wrapping the outer surface of the cylindrical insulated electrode 2 with epoxy resin by casting, and has good insulation and sealing properties.

[0027] As an optional implementation, the electric field cyclone dehydration structure 7 includes a space electrode assembly 8, a vortex breaker 9 and a water-isolating weir plate 10. The space electrode assembly 8, the vortex breaker 9 and the water-isolating weir plate 10 are installed in the vertical tank body from bottom to top in sequence, and the space electrode assembly 8 is electrically connected to the high-voltage power supply.

[0028] As an optional embodiment, the space electrode assembly 8 includes a connecting tube 19, a metal spiral blade 16, an insulating spiral blade 17 and a fixed bracket 15. The metal spiral blade 16 is fixedly wound on the outer wall of the connecting tube 19 in a spiral direction, and the insulating spiral blade 17 is fixedly wound on the outer wall of the connecting tube 19 in a spiral direction. The number of metal spiral blades 16 and insulating spiral blades 17 is multiple, and the metal spiral blades 16 and insulating spiral blades 17 are arranged at intervals. The insulating spiral blade 17 is connected to the positive pole of the high-voltage power supply, and the metal spiral blade 16 is connected to the negative pole of the high-voltage power supply. The outer wall of the connecting tube 19 is connected to the inner wall of the vertical tank body through the fixed bracket 15. The fixed bracket 15 can be a plurality of strip plates, all of which are distributed along the circumferential direction of the connecting tube 19, and the two ends of the strip plates are fixedly connected to the outer wall of the connecting tube 19 and the inner wall of the vertical tank body respectively. Sludge enters the space electrode assembly 8 from the tangential tube 6, forming a strong vortex. It then flows upward along the walls of the spiral blades (i.e., metal spiral blades 16 or insulated spiral blades 17). Centrifugal force propels denser sludge particles to the upper surface of the spiral blades, where they descend along the surface to the bottom of the vertical tank, where they are discharged through the sludge discharge pipe 13. The less dense aqueous phase, on the other hand, moves to the lower surface of the spiral blades, along which it ascends to the upper space of the vertical tank, passes through the fixed bracket 15, and enters the vortex breaker 9. Within the flow channel formed by the multiple spiral blades, shallow sedimentation accelerates the separation of the sludge and aqueous phases. Simultaneously, a non-uniform high-frequency, high-voltage AC electric field is formed between adjacent metal spiral blades 16 and insulated spiral blades 17, further removing bound water from the sludge through dipole coalescence and dielectrophoretic coalescence. This synergistic effect of the electric field, vortex flow, and shallow sedimentation achieves deep, rapid, and efficient sludge dehydration. The circumferential sidewalls of the connecting tube 19 may be provided with multiple through-holes.

[0029] As an optional embodiment, a second insulating layer is provided on the outer surface of the insulating spiral blade 17. The thickness of the second insulating layer is 2 to 4 mm. The second insulating layer is formed by spraying aluminum oxide on the outer surface of the insulating spiral blade 17 or coating the outer surface of the insulating spiral blade 17 with epoxy resin by casting. The metal spiral blade 16 is manufactured using 3D printing technology.

[0030] As an optional embodiment, the vortex breaking member 9 includes a fixed barrel 20 and vortex breaking blades 18. There are multiple vortex breaking blades 18, all of which are distributed along the circumferential direction of the fixed barrel 20. The two ends of the vortex breaking blades 18 are respectively connected to the outer wall of the fixed barrel 20 and the inner wall of the vertical tank body. The sludge passes through the space electrode assembly 8, and the separated water phase enters the vortex breaking member 9. Under the action of the vortex breaking blades 18, the fluid generated by the spiral blades is vortex-broken and the flow is stabilized, allowing the water phase to flow smoothly upward through the vortex breaking member 9 and enter the water barrier weir plate 10.

[0031] As an optional embodiment, a mud discharge pipe 13 is provided at the bottom of the vertical tank body, and the dehydrated sludge is discharged from the mud discharge pipe 13 at the bottom of the vertical tank body. An exhaust pipe 11 is provided at the top of the vertical tank body, and a water outlet pipe 12 is provided on the upper side wall of the vertical tank body. The weir plate 10 includes an overflow tube and an annular plate. The lower end of the overflow tube is connected to the inner wall of the vertical tank body via the annular plate. The height of the annular plate is lower than the bottom end height of the water outlet pipe 12, and the upper end surface of the overflow tube is higher than the top height of the water outlet pipe 12. The water phase passing through the vortex breaking structure 9 will enter the overflow tube, then overflow the lower end of the overflow tube, enter the outside of the overflow tube, and then be discharged from the water outlet pipe 12. The small amount of gas generated during the sludge concentration and dehydration process is discharged through the exhaust pipe 11 at the top of the vertical tank body.

[0032] The working principle of the present invention is as follows: the sludge enters from the inlet pipe 1, and is first pretreated by the non-uniform high-frequency and high-voltage AC electric field generated between the cylindrical insulated electrode 2 and the metal circular tube 5, destroying the cell wall structure in the sludge particles and releasing the internal bound water to improve the sludge fluidity. Then, it passes through the tangential tube 6 to form a vortex and enters the space electrode assembly 8. Under the action of the non-uniform high-frequency and high-voltage AC electric field formed between the adjacent metal spiral blades 16 and the insulating spiral blades 17, the small-sized bound water in the sludge is aggregated into large water droplets for deep dehydration. At the same time, under the action of the centrifugal force of the vortex, the density difference is used to make the heavier sludge move to the upper surface of the spiral blade and settle downward along the surface. The lighter water phase moves to the lower surface of the spiral blade and moves upward along the surface. After the vortex breaking and stabilizing flow is carried out by the vortex breaking blade 18, it finally overflows to the water outlet pipe 12 through the water-blocking weir plate 10 and flows out. A small amount of gas generated in this process is discharged through the exhaust pipe 11. The dehydrated sludge settles to the bottom of the vertical tank and is discharged through the sludge discharge pipe 13, thereby realizing the sludge concentration and dehydration process.

[0033] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A sludge concentration and dehydration equipment based on the synergistic effect of electric field and cyclonic field, characterized in that: It includes a vertical tank, an electric field pretreatment structure (4), an electric field cyclone dehydration structure (7) and a high-voltage power supply, wherein: The electric field pretreatment structure (4) is located outside the vertical tank body, the outlet of the electric field pretreatment structure (4) is connected to the vertical tank body and the electric field pretreatment structure (4) is tangent to the side wall of the vertical tank body, the electric field cyclone dehydration structure (7) is installed inside the vertical tank body, and the electric field pretreatment structure (4) and the electric field cyclone dehydration structure (7) are both electrically connected to the high voltage power supply; The sludge is first pre-treated by the high-frequency and high-voltage alternating current electric field generated by the electric field pre-treatment structure (4), and then enters the vertical tank body in a cyclone manner. The high-frequency and high-voltage alternating current electric field generated by the electric field cyclone dehydration structure (7) performs secondary treatment on the sludge entering the vertical tank body.

2. The sludge concentration and dehydration equipment based on the synergistic effect of electric field and cyclonic field according to claim 1 is characterized in that: The electric field pretreatment structure (4) comprises a cylindrical insulating electrode (2), a metal circular tube (5) and an electrode bracket (14); the cylindrical insulating electrode (2) is fixed in the metal circular tube (5) via the electrode bracket (14); the central axes of the cylindrical insulating electrode (2) and the metal circular tube (5) coincide with each other; one end of the cylindrical insulating electrode (2) is connected to the positive electrode of the high-voltage power supply; the metal circular tube (5) is connected to the negative electrode of the high-voltage power supply; a pretreatment channel exists between the cylindrical insulating electrode (2) and the metal circular tube (5); a high-frequency high-voltage alternating current electric field is generated in the pretreatment channel.

3. The sludge concentration and dehydration equipment based on the synergistic effect of electric field and cyclonic field according to claim 2 is characterized in that: The electric field pretreatment structure (4) further comprises an inlet pipe (1), an insulating bend pipe (3) and a tangential pipe (6), wherein the inlet pipe (1), the insulating bend pipe (3), the metal round pipe (5) and the tangential pipe (6) are sequentially connected via flanges, one end of the cylindrical insulating electrode (2) passes through the side wall of the insulating bend pipe (3) and is connected to the positive electrode of the high-voltage power supply, and the tangential pipe (6) is connected to the lower end portion of the vertical tank body and the tangential pipe (6) is tangential to the side wall of the vertical tank body.

4. The sludge concentration and dehydration equipment based on the synergistic effect of electric field and cyclonic field according to claim 2 is characterized in that: The outer surface of the cylindrical insulating electrode (2) is provided with a first insulating layer, and the thickness of the first insulating layer is 0.5 to 1.5 mm.

5. The sludge concentration and dehydration equipment based on the synergistic effect of electric field and cyclonic field according to claim 4 is characterized in that: The first insulating layer is formed by spraying aluminum oxide on the outer surface of the cylindrical insulating electrode (2), or wrapping the outer surface of the cylindrical insulating electrode (2) with epoxy resin by a casting method.

6. The sludge concentration and dehydration equipment based on the synergistic effect of electric field and cyclonic field according to claim 1 is characterized in that: The electric field cyclone dehydration structure (7) comprises a space electrode assembly (8), a vortex breaking member (9) and a water barrier weir plate member (10); the space electrode assembly (8), the vortex breaking member (9) and the water barrier weir plate member (10) are sequentially installed in the vertical tank body from bottom to top; the space electrode assembly (8) is electrically connected to the high-voltage power supply.

7. The sludge concentration and dehydration equipment based on the synergistic effect of electric field and cyclonic field according to claim 6 is characterized in that: The space electrode assembly (8) includes a connecting tube (19), a metal spiral blade (16), an insulating spiral blade (17) and a fixing bracket (15), wherein the metal spiral blade (16) is fixedly wound on the outer wall of the connecting tube (19) in a spiral direction, and the insulating spiral blade (17) is fixedly wound on the outer wall of the connecting tube (19) in a spiral direction. The number of the metal spiral blade (16) and the insulating spiral blade (17) are both multiple, and the metal spiral blade (16) and the insulating spiral blade (17) are arranged at intervals. The insulating spiral blade (17) is connected to the positive electrode of the high-voltage power supply, and the metal spiral blade (16) is connected to the negative electrode of the high-voltage power supply. The outer wall of the connecting tube (19) is connected to the inner wall of the vertical tank body through the fixing bracket (15).

8. The sludge concentration and dehydration equipment based on the synergistic effect of electric field and cyclonic field according to claim 7 is characterized in that: The outer surface of the insulating spiral blade (17) is provided with a second insulating layer, and the thickness of the second insulating layer is 2 to 4 mm.

9. The sludge concentration and dehydration equipment based on the synergistic effect of electric field and cyclonic field according to claim 6, characterized in that: The vortex breaking member (9) comprises a fixed cylinder (20) and vortex breaking blades (18), wherein the number of the vortex breaking blades (18) is multiple, and all the vortex breaking blades (18) are distributed along the circumferential direction of the fixed cylinder (20), and the two ends of the vortex breaking blades (18) are respectively connected to the outer wall of the fixed cylinder (20) and the inner wall of the vertical tank body.

10. The sludge concentration and dehydration equipment based on the synergistic effect of electric field and cyclonic field according to claim 6, characterized in that: A mud discharge pipe (13) is provided at the bottom of the vertical tank body, an exhaust pipe (11) is provided at the top of the vertical tank body, and a water outlet pipe (12) is provided on the upper side wall of the vertical tank body; The water barrier weir plate (10) includes an overflow cylinder and an annular plate, the lower end of the overflow cylinder is connected to the inner wall of the vertical tank body through the annular plate, the height of the annular plate is lower than the bottom end height of the water outlet pipe (12), and the height of the upper end surface of the overflow cylinder is higher than the top end height of the water outlet pipe (12).

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