A multi-stage sedimentation filtration industrial wastewater treatment device

Abstract

The utility model discloses a kind of industrial wastewater treatment devices of multistage sedimentation filtration, it is related to industrial wastewater treatment field, solve the problem of low efficiency of traditional wastewater treatment, heavy metal is not removed completely.The device contains the pretreatment unit, multistage sedimentation unit, composite filtration unit and intelligent control unit in turn communication.Pretreatment unit is built-in pH adjusting cavity, heavy metal capturing agent dosing device and heavy metal ion capture module, can effectively adjust wastewater pH value and capture heavy metal ion;Multistage sedimentation unit removes suspended solids in wastewater by cyclone sedimentation cavity and inclined plate sedimentation component;Composite filtration unit uses nano catalytic filter material layer and activated carbon adsorption layer to realize depth purification;Intelligent control unit realizes automation monitoring and adjustment by sensor network and PLC controller.This device is compact in structure, high degree of automation, processing effect is remarkable, can efficiently remove pollutants in wastewater, with good application prospect.

Description

Technical Field

[0001] This utility model relates to the field of industrial wastewater treatment, and more specifically to an industrial wastewater treatment device with multi-stage sedimentation and filtration. Background Technology

[0002] With the rapid development of industry, the treatment of industrial wastewater has become an important issue in environmental protection. Currently, industrial wastewater treatment technologies mainly include physical sedimentation, chemical treatment, and biological treatment. However, existing wastewater treatment devices have many shortcomings. In traditional treatment processes, the pretreatment stage usually only adjusts the pH of the wastewater, making it difficult to effectively remove heavy metal ions. Furthermore, the sedimentation unit has low efficiency and cannot efficiently separate suspended solids. The single filter layer design of the filtration unit is also insufficient to meet the needs of deep purification. At the same time, most existing devices lack intelligent control, failing to monitor and adjust key parameters in the treatment process in real time, resulting in unstable treatment effects and difficulty in meeting effluent quality standards. In addition, in existing technologies, the vortex sedimentation chamber structure of the sedimentation unit is simple, and the inlet design is unreasonable, leading to uneven water flow distribution and affecting the sedimentation effect. The inclined plate sedimentation assembly has a fixed inclination angle, which cannot be flexibly adjusted according to the characteristics of the wastewater, and lacks auxiliary devices, making it difficult to completely remove fine particles. In the filtration unit, the nano-catalytic filter layer and activated carbon adsorption layer have single functions and lack synergistic effects, failing to fully realize the purification effect. Meanwhile, the backwashing device is not optimized enough, failing to effectively remove impurities from the filter media layer, thus affecting filtration efficiency and service life. In existing technologies, the performance of the pretreatment unit's exhaust gas treatment and heavy metal scavenging agent dosing devices also needs improvement. Inadequate exhaust gas collection and treatment may lead to secondary pollution. The flow rate adjustment range of the heavy metal scavenging agent dosing device is limited, making precise control of the dosage impossible. The connection between the multi-stage sedimentation unit and the composite filtration unit lacks a buffer design, resulting in significant water flow impact and affecting subsequent treatment effects. The intelligent control unit has relatively simple functions, lacking IoT communication and backup power modules, making remote monitoring and emergency power supply impossible, thus limiting the device's intelligence and reliability.

[0003] In summary, existing industrial wastewater treatment devices have many shortcomings in pretreatment, sedimentation, filtration, and intelligent control, making it difficult to meet the demands for efficient, stable, and intelligent wastewater treatment. Therefore, there is an urgent need for a new type of industrial wastewater treatment device that can comprehensively address these issues, thereby improving wastewater treatment efficiency and effluent quality, reducing operating costs, and achieving efficient purification and resource utilization of industrial wastewater. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by establishing a pretreatment unit, a multi-stage sedimentation unit, a composite filtration unit, and an intelligent control unit connected in sequence, thereby achieving efficient, stable, and intelligent industrial wastewater treatment. The pretreatment unit incorporates a pH adjustment chamber, a heavy metal scavenging agent dosing device, and a heavy metal ion capture module, enabling precise adjustment of wastewater pH and efficient removal of heavy metal ions. The multi-stage sedimentation unit optimizes the structure of the cyclone sedimentation chamber and the inclined plate sedimentation assembly to improve suspended solids separation efficiency. The composite filtration unit employs a combination of a nano-catalytic filter media layer and an activated carbon adsorption layer, and is equipped with an ultrasonic backwashing device for deep purification and efficient backwashing. The intelligent control unit uses a sensor network and a PLC controller to achieve automated monitoring and adjustment, ensuring the stability of the treatment process and compliance with effluent quality standards. Furthermore, by optimizing the design of each unit, such as the gradually expanding inlet of the cyclone sedimentation chamber, the tilt angle adjustment mechanism of the inclined plate sedimentation assembly, and the electromagnetic induction coil and photocatalytic mesh plate of the composite filtration unit, the treatment efficiency and reliability of the device are further improved. This invention aims to solve the problems of insufficient pretreatment, low sedimentation efficiency, single filtration function, and insufficient intelligence in the existing technology, and provides a brand-new solution for the efficient purification and resource utilization of industrial wastewater.

[0005] To achieve the above-mentioned technical effects, the present invention adopts the following technical solution: A multi-stage sedimentation and filtration industrial wastewater treatment device includes a pretreatment unit, a multi-stage sedimentation unit, a composite filtration unit, and an intelligent control unit connected in sequence. The pretreatment unit incorporates a pH adjustment chamber and a heavy metal ion capture agent dosing device. A spiral stirrer is installed at the bottom of the pH adjustment chamber. The pretreatment unit also includes a heavy metal ion capture module composed of a cylindrical filter cartridge filled with chelating resin, with guide spiral plates installed inside the cartridge. The multi-stage sedimentation unit consists of a series-connected vortex sedimentation chamber and an inclined plate sedimentation assembly. A tangential inlet is located at the top of the vortex sedimentation chamber, and a conical sludge collection hopper is located at the bottom. The inclined plate sedimentation assembly includes an inclined angle. The system comprises a parallel inclined plate group with an angle of 60°-75°; the composite filtration unit includes a nano-catalytic filter material layer and an activated carbon adsorption layer, with an ultrasonic backwashing device between the two layers; the intelligent control unit is connected to each processing unit through a sensor network, which includes a pH sensor, a conductivity meter, a turbidimeter, and a heavy metal ion concentration sensor; a PLC controller is installed within the intelligent control unit; a temperature regulating device is installed on the inner wall of the pH regulating chamber, which consists of a heating tube and a cooling tube. The heating tube is a stainless steel electric heating tube, and the cooling tube is a serpentine copper tube structure. The temperature regulating device is connected to the PLC controller through a temperature controller.

[0006] The tangential inlet of the cyclone sedimentation chamber has a gradually expanding structure, with the ratio of the inner diameter of the inlet end to the inner diameter of the outlet end being 1:1.5-1:2. Guide vanes are provided on the inner side of the inlet, with 4-6 vanes and an inclination angle of 30°-45°. The guide vanes are connected to the inner wall of the inlet via a fixed bracket. An annular guide ring is provided on the inner wall of the cyclone sedimentation chamber, located 10-15cm below the tangential inlet. The ring is 5-8cm wide and has a trapezoidal cross-section, with an upper base width of 2-3cm, a lower base width of 4-5cm, and a height of 3-4cm.

[0007] The inclined plate sedimentation assembly is equipped with a microbubble generator between the inclined plates. This generator consists of a perforated aeration pipe and an air pump. The aeration pipe has a hole diameter of 0.5-1 mm and an aeration rate of 0.1-0.3 m³ / (m²・h). The bottom of the inclined plate assembly is equipped with a tilt angle adjustment mechanism with an adjustment angle range of ±15°. The tilt angle adjustment mechanism includes an electric push rod and an angle sensor. The top of the inclined plate assembly is equipped with a vibration device, which consists of a vibration motor and a connecting rod. The connecting rod is fixedly connected to the upper surface of the inclined plate assembly. The vibration frequency of the vibration motor is 50-100 Hz and the amplitude is 0.5-1 mm.

[0008] An electromagnetic induction coil is installed on the outer side of the nanocatalytic filter media layer of the composite filtration unit. The coil has 200-300 turns and an operating current of 1-2A. A TiO2 photocatalytic mesh is embedded in the activated carbon adsorption layer. The mesh has a porosity of ≥70% and a thickness of 5-10mm. The electromagnetic induction coil is fixed to the outer wall of the filter media layer by a bracket. A magnetic separator is installed at the bottom of the nanocatalytic filter media layer. The magnetic separator consists of a permanent magnet and a filter screen. The permanent magnet is fixed to the bottom bracket of the filter media layer. The filter screen has a pore size of 1-2mm. The magnetic separator is linked and controlled by the electromagnetic induction coil.

[0009] The transducer array of the ultrasonic backwashing device is arranged in a matrix, with a horizontal spacing of 50-100mm and a vertical spacing of 80-120mm. A reflector is installed at the bottom of the transducer, with the reflector at an angle of 45°-60° to the horizontal plane. The surface of the reflector is coated with a titanium alloy reflective layer.

[0010] The pH adjustment chamber of the pretreatment unit is equipped with a waste gas collection hood at the top. The hood is connected to an activated carbon adsorption tower through a pipe. The tower is filled with activated carbon particles with a particle size of 2-4 mm. The heavy metal capture agent dosing device adopts a twin-screw pump with a flow rate adjustment range of 10-50 L / h. A filter is installed at the inlet end of the twin-screw pump.

[0011] A flow buffer tank is provided between the multi-stage sedimentation unit and the composite filtration unit. The tank volume is 10-15% of the processing flow rate. Baffles are provided inside the tank. There are 3-5 baffles with a baffle angle of 90°-120°. A serrated flow guide structure is provided on the top of the baffles.

[0012] The intelligent control unit also includes an IoT communication module, which adopts the NB-IoT communication standard, has a built-in GPS positioning chip, and connects to an external touch screen of 7-10 inches with a resolution of ≥800×480 pixels. The touch screen is connected to the PLC controller via a data cable. The intelligent control unit is equipped with a backup power module, which consists of a lithium battery pack and a charge / discharge controller. The lithium battery pack has a capacity of 20-30Ah, and the charge / discharge controller has overcharge and over-discharge protection functions. The backup power module is connected to the PLC controller via a relay.

[0013] The composite filtration unit is followed by a membrane filtration assembly, which is composed of hollow fiber membrane elements with a pore size of 0.01-0.1 μm and a membrane area of ​​10-20 m². The membrane assembly is equipped with a chemical cleaning system, and the cleaning solution is a citric acid solution with a mass fraction of 2-5%. The chemical cleaning system includes a cleaning pump and a storage tank.

[0014] The pretreatment unit, multi-stage sedimentation unit, and composite filtration unit are all equipped with drainage pipes at their bottoms. Electric ball valves are installed on the pipes, and pressure sensors are installed on the connecting pipes between each unit. The sensors have a measurement range of 0-0.6 MPa and an accuracy class of 0.5. The pressure sensors are connected to the pipes via flanges.

[0015] The positive and beneficial technical effects of this utility model are as follows: This invention effectively removes heavy metal ions from wastewater by employing a pretreatment unit with a built-in pH adjustment chamber, a heavy metal scavenging agent dosing device, and a heavy metal ion capture module. This solves the problem that traditional pretreatment stages can only simply adjust pH and are unable to remove heavy metal ions. By optimizing the inlet structure of the cyclone sedimentation chamber and the tilt angle adjustment function of the inclined plate sedimentation component, the separation efficiency of the sedimentation unit is improved, solving the problems of uneven water flow distribution, poor sedimentation effect, and fixed tilt angle of the inclined plate in existing sedimentation units. Through the synergistic effect of the nano-catalytic filter layer and the activated carbon adsorption layer in the composite filtration unit, and equipped with an ultrasonic backwashing device, deep purification and efficient backwashing are achieved, solving the problems of single function of the filtration unit, poor purification effect, and suboptimal design and short service life of the backwashing device. By equipping the intelligent control unit with a sensor network, PLC controller, IoT communication module, and backup power module, real-time monitoring, automated control, and remote monitoring of the wastewater treatment process are realized, solving the problems of low intelligence, unstable treatment effect, and lack of emergency power supply in existing devices. In summary, this invention can significantly improve the efficiency of industrial wastewater treatment and the quality of effluent, reduce operating costs, and achieve efficient purification and resource utilization of wastewater. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein: Figure 1 This is an overall structural diagram of an industrial wastewater treatment device with multi-stage sedimentation and filtration according to the present invention. Figure 2 This is a structural diagram of the pretreatment unit of a multi-stage sedimentation and filtration industrial wastewater treatment device according to the present invention. Figure 3 This is a structural diagram of a multi-stage sedimentation unit in an industrial wastewater treatment device according to the present invention. Figure 4 This is a structural diagram of a composite filtration unit in a multi-stage sedimentation and filtration industrial wastewater treatment device according to the present invention. Figure 5 This is a structural diagram of the intelligent control unit of a multi-stage sedimentation and filtration industrial wastewater treatment device according to the present invention. Figure 6 This is a structural diagram of a membrane filtration component for a multi-stage sedimentation and filtration industrial wastewater treatment device according to the present invention. Figure 7This is a structural diagram of the flow buffer tank of a multi-stage sedimentation and filtration industrial wastewater treatment device according to the present invention. In the diagram: Pretreatment unit 1, multi-stage sedimentation unit 2, composite filtration unit 3, intelligent control unit 4, pH adjustment chamber 100, heavy metal scavenging agent dosing device 101, spiral stirrer 102, cylindrical filter cartridge 103, flow guide spiral plate 104, exhaust gas collection hood 105, pipeline 106, activated carbon adsorption tower 107, activated carbon granules 108, twin screw pump 109, filter 110, exhaust pipeline 111, electric ball valve 112, pressure sensor 113, flange 114. Temperature regulating device 115, heating tube 116, cooling tube 117, temperature controller 118, vortex sedimentation chamber 200, inclined plate sedimentation assembly 201, tangential liquid inlet 202, conical sludge collection hopper 203, parallel inclined plate assembly 204, guide vanes 205, fixed bracket 206, microbubble generator 207, perforated aeration pipe 208, air pump 209, tilt angle adjustment mechanism 210, electric push rod 211, angle sensor 212, flow buffer tank 213, baffle plate 214. 215. Serrated flow guide structure; 216. Annular flow guide ring; 217. Vibration device; 218. Vibration motor; 219. Connecting rod; 300. Nanocatalytic filter media layer; 301. Activated carbon adsorption layer; 302. Ultrasonic backwashing device; 303. Electromagnetic induction coil; 304. TiO2 photocatalytic mesh plate; 305. Support; 306. Transducer array; 307. Reflector plate; 308. Titanium alloy reflector layer; 309. Membrane filtration assembly; 310. Hollow fiber membrane element; 311. Chemical cleaning system; Cleaning. Pump 312, liquid storage tank 313, magnetic separator 320, permanent magnet 321, filter screen 322, bottom support of filter media layer 323, pH sensor 400, conductivity meter 401, turbidity meter 402, heavy metal ion concentration sensor 403, PLC controller 404, Internet of Things communication module 405, GPS positioning chip 406, touch screen 407, data cable 408, backup power module 409, lithium battery pack 410, charge and discharge controller 411, relay 412. Detailed Implementation

[0017] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0018] like Figures 1-7As shown, the multi-stage sedimentation and filtration industrial wastewater treatment device of this utility model includes a pretreatment unit 1, a multi-stage sedimentation unit 2, a composite filtration unit 3, and an intelligent control unit 4 connected in sequence. The pretreatment unit 1 is equipped with a pH adjustment chamber 100 for adjusting the acidity or alkalinity of the wastewater, and a spiral stirrer 102 is installed at its bottom to ensure thorough mixing of the reagents and wastewater. Furthermore, a heavy metal scavenging agent dosing device 101 precisely adds the heavy metal scavenging agent via a twin-screw pump 109, while a filter 110 prevents impurities from entering the pump body. The multi-stage sedimentation unit 2 consists of a vortex sedimentation chamber 200 and an inclined plate sedimentation assembly 201. The vortex sedimentation chamber 200 has a tangential inlet 202 at the top and a conical sludge collection hopper 203 at the bottom. The inclined plate sedimentation assembly 201 includes a group of parallel inclined plates 204 with an inclination angle of 60°-75° to improve sedimentation efficiency. The composite filtration unit 3 includes a nano-catalytic filter media layer 300 and an activated carbon adsorption layer 301, with an ultrasonic backwashing device 302 in between to maintain the cleanliness of the filter media and filtration efficiency. The intelligent control unit 4 monitors the operating status of each treatment unit through a sensor network and performs automated control via a PLC controller 404, ensuring the stability and efficiency of the treatment process. The entire device is designed to achieve efficient purification and resource utilization of industrial wastewater, resulting in significant environmental and economic benefits.

[0019] A multi-stage sedimentation and filtration industrial wastewater treatment device includes a pretreatment unit 1, a multi-stage sedimentation unit 2, a composite filtration unit 3, and an intelligent control unit 4 connected in sequence. The pretreatment unit 1 includes a built-in pH adjustment chamber 100 and a heavy metal scavenging agent dosing device 101. A spiral stirrer 102 is installed at the bottom of the pH adjustment chamber 100. The pretreatment unit 1 also includes a heavy metal ion scavenging module composed of a cylindrical filter cartridge 103 filled with chelating resin, with a flow-guiding spiral plate 104 inside the filter cartridge 103. The multi-stage sedimentation unit 2 consists of a series-connected vortex sedimentation chamber 200 and an inclined plate sedimentation assembly 201. The vortex sedimentation chamber 200 has a tangential inlet 202 at the top and a conical sludge collection hopper 203 at the bottom. The inclined plate sedimentation assembly 201 has an inclination angle of 60°. A parallel inclined plate group 204 at 75°; the composite filtration unit 3 includes a nano-catalytic filter material layer 300 and an activated carbon adsorption layer 301, with an ultrasonic backwashing device 302 between the two layers; the intelligent control unit 4 is connected to each processing unit through a sensor network, which includes a pH sensor 400, a conductivity meter 401, a turbidity meter 402, and a heavy metal ion concentration sensor 403, and a PLC controller 404 is installed inside the intelligent control unit 4; a temperature regulating device 115 is installed on the inner wall of the pH regulating chamber 100, which consists of a heating tube 116 and a cooling tube 117. The heating tube 116 is a stainless steel electric heating tube, and the cooling tube 117 is a serpentine copper tube structure. The temperature regulating device 115 is connected to the PLC controller 404 through a temperature controller 118.

[0020] This utility model's multi-stage sedimentation and filtration industrial wastewater treatment device effectively solves many problems existing in current wastewater treatment technologies, such as insufficient pretreatment, low sedimentation efficiency, poor filtration effect, and insufficient intelligence, through the synergistic effect of a pretreatment unit, a multi-stage sedimentation unit, a composite filtration unit, and an intelligent control unit. In the pretreatment unit 1, the built-in pH adjustment chamber 100 and heavy metal scavenging agent dosing device 101 can precisely adjust the pH of the wastewater and effectively remove heavy metal ions. The spiral stirrer 102 at the bottom of the pH adjustment chamber ensures thorough mixing of the agent and wastewater, improving adjustment efficiency. Simultaneously, the filter cartridge 103 filled with chelating resin further captures residual heavy metal ions, and the internal guide spiral plate 104 optimizes the water flow path, enhancing the treatment effect. Furthermore, the temperature adjustment device 115 on the inner wall of the pH adjustment chamber can adjust the temperature according to the wastewater characteristics, further improving the adaptability and stability of the pretreatment. The multi-stage sedimentation unit 2 achieves efficient sedimentation through the combination of a vortex sedimentation chamber 200 and an inclined plate sedimentation assembly 201. The tangential inlet 202 at the top of the cyclone sedimentation chamber and the conical sludge collection hopper 203 at the bottom utilize centrifugal force and gravity to rapidly separate suspended solids. The parallel inclined plate group 204 in the inclined plate sedimentation assembly further improves sedimentation efficiency; its inclination angle of 60°-75° optimizes water flow and ensures effective sedimentation. The composite filtration unit 3 combines a nano-catalytic filter media layer 300 and an activated carbon adsorption layer 301, which not only removes organic matter and odors from wastewater but also further decomposes pollutants through nano-catalysis. The ultrasonic backwashing device 302 between the two layers periodically cleans the filter media to prevent clogging, extend its service life, and improve filtration efficiency. The intelligent control unit 4 monitors key parameters of each treatment unit in real time through a sensor network, such as pH value, conductivity, turbidity, and heavy metal ion concentration, and achieves automated control through a PLC controller 404. This intelligent design not only improves the stability of the treatment process and the reliability of the effluent quality but also reduces manual intervention and improves operational efficiency. In summary, this utility model, through the optimized design and synergistic effect of each unit, effectively solves the shortcomings of existing wastewater treatment technologies, achieves efficient, stable, and intelligent wastewater treatment, significantly improves treatment efficiency and effluent quality, and reduces operating costs, demonstrating significant practicality and innovation.

[0021] In the above specific embodiments, the technical essence of this utility model's multi-stage sedimentation and filtration industrial wastewater treatment device lies in achieving efficient purification through the synergistic effect of multiple treatment units. The working process is as follows: Wastewater first enters the pH adjustment chamber of the pretreatment unit, where the pH is adjusted to a suitable range by adding acid and alkali. A spiral stirrer ensures thorough mixing of the reagents and wastewater. A heavy metal scavenging agent is added via a dosing device, reacting with heavy metal ions in the wastewater to form precipitates. Simultaneously, the wastewater flows through a filter cartridge filled with chelating resin, further capturing residual heavy metal ions. A guide spiral plate optimizes the water flow, improving capture efficiency. Subsequently, the wastewater enters the vortex sedimentation chamber of the multi-stage sedimentation unit. The tangential inlet causes the wastewater to swirl, and suspended solids move towards the chamber wall under centrifugal force and settle into the conical sludge collection hopper. Next, the wastewater flows into the inclined plate sedimentation assembly. The parallel inclined plates increase the sedimentation area and shorten the particle settling distance, further removing suspended solids. After entering the composite filtration unit, the wastewater first passes through a nano-catalytic filter media layer, where it catalytically decomposes some organic matter. It then passes through an activated carbon adsorption layer to adsorb residual organic matter and odors. An ultrasonic backwashing device periodically cleans the filter media layer to prevent clogging. The intelligent control unit monitors various parameters in real time via a sensor network, and the PLC controller automatically adjusts the operating parameters of each unit based on the data. For example, the temperature control device in the pH adjustment chamber can adjust the wastewater temperature based on feedback from the temperature controller to ensure stable treatment results.

[0022] The tangential inlet 202 of the cyclone sedimentation chamber 200 has a gradually expanding structure, with the ratio of the inner diameter of the inlet end to the inner diameter of the outlet end being 1:1.5-1:2. Guide vanes 205 are provided on the inner side of the inlet, with 4-6 vanes and an inclination angle of 30°-45°. The guide vanes 205 are connected to the inner wall of the inlet via a fixed bracket 206. An annular guide ring 216 is provided on the inner wall of the cyclone sedimentation chamber 200. The guide ring 216 is located 10-15cm below the tangential inlet 202, with a ring width of 5-8cm. The cross-section of the guide ring 216 is trapezoidal, with an upper base width of 2-3cm, a lower base width of 4-5cm, and a height of 3-4cm.

[0023] In the above specific embodiments, the technical essence of the design of the vortex sedimentation chamber in this utility model lies in enhancing the vortex effect and improving the sedimentation efficiency by optimizing the inlet and inner wall structure. The working process is as follows: Wastewater enters the vortex sedimentation chamber through a tangential inlet. This inlet adopts a gradually expanding structure, with the ratio of the inner diameter of the inlet end to the inner diameter of the outlet end being 1:1.5-1:2. This design allows the water flow to gradually accelerate and diffuse as it enters the chamber, forming a stable tangential flow. Four to six guide vanes are installed on the inner side of the inlet, with an inclination angle of 30°-45°. These vanes are connected to the inner wall of the inlet through a fixed bracket. The guide vanes further guide the direction of the water flow, enhance the vortex intensity, and enable the solid particles in the wastewater to move more effectively towards the chamber wall and settle under the action of centrifugal force. An annular guide ring is installed 10-15 cm below the tangential inlet on the inner wall of the cyclone sedimentation chamber. Its cross-section is trapezoidal, with an upper base width of 2-3 cm, a lower base width of 4-5 cm, a height of 3-4 cm, and a ring width of 5-8 cm. The guide ring stabilizes the cyclone, preventing turbulence or backflow within the chamber, ensuring orderly rotation of the water, and extending the residence time of particles in the cyclone, thereby improving sedimentation efficiency. Simultaneously, the trapezoidal cross-section of the guide ring helps reduce water flow resistance, further optimizing the cyclone effect. Through this structural design, the cyclone sedimentation chamber can efficiently separate suspended solids and solid particles from wastewater. The precipitate settles into the conical sludge collection hopper under centrifugal force, achieving solid-liquid separation. This design not only improves sedimentation efficiency but also reduces the floor space required for the sedimentation tank, lowering equipment costs and operating energy consumption, demonstrating significant practicality and innovation.

[0024] A microbubble generator 207 is installed between the inclined plates 204 of the inclined plate sedimentation assembly 201. This device consists of a perforated aeration pipe 208 and an air pump 209. The aeration pipe 208 has a hole diameter of 0.5-1mm and an aeration rate of 0.1-0.3m³ / (m²・h). An angle adjustment mechanism 210 is installed at the bottom of the inclined plate assembly 204, with an adjustment angle range of ±15°. The angle adjustment mechanism 210 includes an electric push rod 211 and an angle sensor 212. A vibration device 217 is installed at the top of the inclined plate assembly 204. The vibration device 217 consists of a vibration motor 218 and a connecting rod 219. The connecting rod 219 is fixedly connected to the upper surface of the inclined plate assembly 204. The vibration frequency of the vibration motor 218 is 50-100Hz and the amplitude is 0.5-1mm.

[0025] In the above specific embodiments, the technical essence of the inclined plate sedimentation assembly design of this utility model lies in optimizing the sedimentation process and improving sedimentation efficiency and removal effect through the synergistic action of a microbubble generator, an inclination adjustment mechanism, and a vibration device. First, the microbubble generator, consisting of perforated aeration pipes and an air pump, is installed between the inclined plates. The aeration pipes have a pore size of 0.5-1 mm and an aeration rate of 0.1-0.3 m³ / (m²・h). During operation, the air pump delivers air into the inclined plate sedimentation assembly through the perforated aeration pipes, generating a large number of microbubbles. These microbubbles adhere to suspended particles in the wastewater, increasing the buoyancy of the particles and making them more likely to float to the surface, thereby improving the removal efficiency of suspended particles, especially for fine particles. Second, an inclination adjustment mechanism is installed at the bottom of the inclined plate assembly, with an adjustment angle range of ±15°. This mechanism consists of an electric push rod and an angle sensor. By extending and retracting the electric push rod, the inclination angle of the inclined plate assembly can be flexibly adjusted to adapt to different water qualities and treatment requirements. An angle sensor monitors the tilt angle of the inclined plates in real time to ensure precise adjustment. This design allows for dynamic adjustment of the inclined plate angle based on wastewater characteristics, optimizing water flow and sedimentation effects, and further improving sedimentation efficiency. Finally, a vibration device, consisting of a vibration motor and connecting rod, is installed at the top of the inclined plate assembly. The vibration motor operates at a frequency of 50-100Hz and an amplitude of 0.5-1mm. During operation, the vibration device transmits vibration to the inclined plate assembly via the connecting rod, causing minute vibrations on the inclined plate surface. This vibration effectively prevents the accumulation and clogging of suspended particles on the inclined plate surface, while promoting particle settling, further improving sedimentation efficiency and equipment operational stability. In summary, through the synergistic effect of the microbubble generator, tilt angle adjustment mechanism, and vibration device, the inclined plate sedimentation assembly of this invention significantly improves wastewater treatment efficiency and optimizes sedimentation effects, especially performing exceptionally well in treating wastewater containing fine suspended particles. This design not only enhances the adaptability and flexibility of the equipment but also extends its service life, demonstrating significant practicality and innovation.

[0026] An electromagnetic induction coil 303 is provided on the outside of the nanocatalytic filter layer 300 of the composite filter unit 3. The coil has 200-300 turns and an operating current of 1-2A. A TiO2 photocatalytic mesh plate 304 is embedded in the activated carbon adsorption layer 301. The mesh plate has a porosity of ≥70% and a thickness of 5-10mm. The electromagnetic induction coil 303 is fixed to the outer wall of the filter layer by a bracket 305. A magnetic separator 320 is provided at the bottom of the nanocatalytic filter layer 300. The magnetic separator 320 is composed of a permanent magnet 321 and a filter screen 322. The permanent magnet 321 is fixed to the bottom bracket 323 of the filter layer. The filter screen 322 has a pore size of 1-2mm. The magnetic separator 320 is linked to the electromagnetic induction coil 303 for control.

[0027] In the above specific embodiments, the composite filtration unit of this invention achieves efficient deep purification and impurity separation through the synergistic effect of a nano-catalytic filter layer, an electromagnetic induction coil, a TiO2 photocatalytic mesh plate, and a magnetic separator. The core technology lies in improving filtration efficiency and water purification effect. During operation, wastewater first flows through the nano-catalytic filter layer, which has the ability to catalytically decompose organic matter and effectively degrade organic pollutants in the wastewater. An electromagnetic induction coil with 200-300 turns and a working current of 1-2A is installed on the outside of the filter layer. This generates a magnetic field, further enhancing the activity of the nano-catalytic filter material, improving catalytic efficiency, and accelerating the decomposition of organic matter. Simultaneously, the magnetic field can also perform preliminary separation of magnetic particles in the wastewater. The TiO2 photocatalytic mesh plate embedded in the activated carbon adsorption layer has a porosity ≥70% and a thickness of 5-10mm, further enhancing the purification effect. TiO2 has photocatalytic properties and can generate highly oxidizing free radicals under light conditions, decomposing organic matter. Simultaneously, the activated carbon adsorption layer adsorbs residual organic matter, odors, and pigments, achieving deep purification. The electromagnetic induction coil is fixed to the outer wall of the filter media layer by a bracket, ensuring structural stability and uniform magnetic field distribution. The magnetic separator at the bottom of the nano-catalytic filter media layer consists of a permanent magnet and a filter screen. The permanent magnet is fixed to the bracket at the bottom of the filter media layer, and the filter screen has a pore size of 1-2 mm. The magnetic separator is linked to the electromagnetic induction coil for control, using the magnetic field to separate and collect magnetic particles in the wastewater onto the filter screen, preventing these particles from entering subsequent treatment stages. This also reduces the risk of clogging the filter media layer, extends its service life, and lowers maintenance costs. In summary, this composite filtration unit, through the synergistic effect of multiple technologies, achieves efficient degradation, adsorption, and impurity separation of organic matter in industrial wastewater, significantly improving wastewater treatment efficiency and effluent quality, demonstrating significant application value and innovation.

[0028] The transducer array 306 of the ultrasonic backwashing device 302 is arranged in a matrix, with a horizontal spacing of 50-100mm and a vertical spacing of 80-120mm. A reflector plate 307 is provided at the bottom of the transducer, with the reflector plate 307 having an angle of 45°-60° with the horizontal plane. The surface of the reflector plate 307 is coated with a titanium alloy reflective layer 308.

[0029] In the above specific embodiments, the technical essence of the ultrasonic backwashing device design of this utility model lies in enhancing the backwashing effect of ultrasound and improving the cleaning efficiency and service life of the filter unit by optimizing the layout of the transducer array and the structure of the reflector plate. During operation, the transducer array of the ultrasonic backwashing device adopts a matrix distribution with a horizontal spacing of 50-100mm and a vertical spacing of 80-120mm. This matrix layout ensures that the ultrasonic energy is evenly distributed within the filter unit, avoiding energy concentration or uneven dispersion, thereby achieving comprehensive cleaning of the entire filter layer. Ultrasonic waves generate a cavitation effect through high-frequency vibration, effectively removing impurities and blockages from the filter media layer and restoring its permeability. A reflector plate is installed at the bottom of the transducer, with an angle of 45°-60° to the horizontal plane. This tilt angle design allows the ultrasonic waves to form an optimal reflection path during reflection, enhancing the propagation distance and energy utilization rate. The surface of the reflector plate is coated with a titanium alloy reflective layer. Titanium alloy has high reflectivity and good corrosion resistance, which can further improve the ultrasonic wave reflection efficiency and extend the service life of the reflector plate. During backwashing, ultrasonic waves are emitted from the transducer array and reflected by the reflector plate, acting evenly on all parts of the filter unit. The cavitation effect of the ultrasonic waves generates a large number of microbubbles in the filter media layer. These bubbles generate strong local impact forces during their growth and collapse, effectively loosening and removing impurities and blockages adhering to the filter media surface. The design of the reflector plate not only improves the utilization efficiency of the ultrasonic waves but also further enhances the backwashing effect through its tilt angle and the characteristics of the titanium alloy reflector layer. In summary, the ultrasonic backwashing device of this invention achieves a highly efficient backwashing function through a matrix-distributed transducer array and an optimized reflector plate design. It can significantly improve the cleaning efficiency and service life of the filter unit, reduce equipment maintenance costs, and has significant practicality and innovation.

[0030] The pH adjustment chamber 100 of the pretreatment unit 1 is equipped with a waste gas collection hood 105 at the top. The hood is connected to the activated carbon adsorption tower 107 through a pipe 106. The tower is filled with activated carbon particles 108 with a particle size of 2-4 mm. The heavy metal capture agent dosing device 101 adopts a twin screw pump 109 with a pump flow rate adjustment range of 10-50 L / h. The inlet end of the twin screw pump 109 is equipped with a filter 110.

[0031] In the above specific embodiments, the technical essence of the pretreatment unit design in this utility model lies in achieving efficient pretreatment while reducing secondary pollution and ensuring the environmental friendliness and safety of the wastewater treatment process by optimizing pH adjustment, waste gas treatment, and heavy metal scavenging agent dosing devices. During operation, wastewater first enters the pH adjustment chamber of the pretreatment unit, where the pH is adjusted to a suitable range by adding acids and alkalis to meet the process requirements of subsequent treatment units. To reduce the environmental impact of waste gas generated during the adjustment process, a waste gas collection hood 105 is installed at the top of the pH adjustment chamber. The waste gas is transported through pipelines to an activated carbon adsorption tower, which is filled with activated carbon particles with a particle size of 2-4 mm. The activated carbon particles have a high specific surface area and adsorption performance, effectively adsorbing harmful substances in the waste gas, such as volatile organic compounds (VOCs) and acidic and alkaline gases, thereby achieving waste gas purification and preventing secondary pollution. Simultaneously, the heavy metal scavenging agent dosing device in the pretreatment unit uses a twin-screw pump with a flow rate adjustment range of 10-50 L / h. The twin-screw pump design allows for precise control of the heavy metal scavenging agent dosage, ensuring effective capture and precipitation of heavy metal ions in wastewater. A filter is installed at the inlet of the twin-screw pump to remove impurities and particulate matter from the scavenging agent solution, preventing clogging of nozzles or pipes and ensuring smooth and stable dosing. In summary, this invention's pretreatment unit effectively solves the problem of waste gas emissions during wastewater treatment through waste gas collection and activated carbon adsorption. Simultaneously, the precise dosing of the heavy metal scavenging agent via the twin-screw pump, coupled with the filter, ensures efficient removal of heavy metal ions and stability of the treatment process. This design not only improves pretreatment efficiency but also reduces negative environmental impacts, demonstrating significant environmental benefits and practical value.

[0032] A flow buffer tank 213 is provided between the multi-stage sedimentation unit 2 and the composite filtration unit 3. The tank volume is 10-15% of the processing flow rate. A baffle 214 is provided inside the tank. There are 3-5 baffles with a baffle angle of 90°-120°. A serrated flow guide structure 215 is provided on the top of the baffle 214.

[0033] In the above specific embodiments, this utility model sets up a flow buffer tank between the multi-stage sedimentation unit and the composite filtration unit. Its technical essence lies in reducing water flow impact and improving the stability and treatment effect of subsequent treatment units by buffering and optimizing the water flow state. During operation, wastewater flows out of the multi-stage sedimentation unit and enters the flow buffer tank. The volume of the buffer tank is designed to be 10%-15% of the treatment flow rate. This ratio effectively balances fluctuations in wastewater flow, ensuring that the water flow reaches a relatively stable state before entering the composite filtration unit. The buffer tank is equipped with 3-5 baffles, with baffle angles of 90°-120°. These baffles guide the water flow direction, forming an orderly baffle path within the tank, further reducing turbulence and impact, while increasing the residence time of wastewater in the buffer tank, promoting further sedimentation of suspended solids. A serrated guide structure is also provided at the top of the baffles. This serrated structure further optimizes water flow distribution, making the water flow more uniform when entering the composite filtration unit and preventing localized overload or impact damage to the filtration unit due to excessively fast local water flow. The serrated guide structure also increases the surface area of ​​the water flow, promoting gas-liquid separation and further improving water quality stability. In summary, the design of the flow buffer tank, through its reasonable volume, baffles, and serrated guide structure, effectively solves the problem of unstable operation of subsequent treatment units caused by flow fluctuations and water flow impacts during wastewater treatment. This design not only improves the stability and reliability of the entire wastewater treatment system but also optimizes the treatment effect, reduces equipment wear and maintenance costs, and has significant practicality and innovation.

[0034] The intelligent control unit 4 also includes an Internet of Things (IoT) communication module 405, which adopts the NB-IoT communication standard and has a built-in GPS positioning chip 406. The PLC controller 404 is connected to an external touch screen 407 with a screen size of 7-10 inches and a resolution of ≥800×480 pixels. The touch screen 407 is connected to the PLC controller 404 via a data cable 408. The intelligent control unit 4 is equipped with a backup power module 409, which consists of a lithium battery pack 410 and a charge / discharge controller 411. The lithium battery pack 410 has a capacity of 20-30Ah, and the charge / discharge controller 411 has overcharge and over-discharge protection functions. The backup power module 409 is connected to the PLC controller 404 via a relay 412.

[0035] In the above specific embodiments, the intelligent control unit of this utility model integrates an IoT communication module, a GPS positioning chip, a touch screen, and a backup power module to achieve intelligent, remote monitoring, and highly reliable operation of the wastewater treatment device. The essence of the technology lies in improving the automation level and remote management capabilities of the wastewater treatment device, while ensuring stable operation of the equipment in case of emergencies. During operation, the PLC controller of the intelligent control unit collects key parameters in the wastewater treatment process in real time through a sensor network, such as pH value, conductivity, turbidity, and heavy metal ion concentration, and automatically adjusts each treatment unit according to preset control logic to ensure stable and compliant treatment results. The IoT communication module adopts the NB-IoT communication standard and has a built-in GPS positioning chip, enabling the device to have remote data transmission and precise positioning functions. Through the NB-IoT network, the device's operating data can be uploaded to the cloud server in real time, allowing managers to remotely monitor the device status through mobile phones, computers, and other terminals, and promptly detect and handle abnormal situations. Simultaneously, the GPS positioning function facilitates geographical location and asset management of the equipment. The external touch screen of the PLC controller has a screen size of 7-10 inches and a resolution of 800×80 pixels, and is connected to the PLC controller via a data cable. The touchscreen provides on-site operators with an intuitive and convenient interface, displaying real-time equipment operating parameters and alarm information, and supporting manual adjustment of control parameters for local intelligent operation. Furthermore, the intelligent control unit is equipped with a backup power module, consisting of a 20-30Ah lithium battery pack and a charge / discharge controller with overcharge and over-discharge protection. The backup power module is connected to the PLC controller via a relay, automatically switching to backup power in the event of a mains power outage or other emergencies, ensuring continuous operation of critical equipment functions, preventing data loss and equipment damage due to power failures, and improving equipment reliability and resilience. In summary, this utility model's intelligent control unit, through IoT communication, local touchscreen operation, and backup power protection, achieves intelligent, remote monitoring, and highly reliable operation of the wastewater treatment device, significantly improving equipment management efficiency and operational stability, and possesses significant application value and innovation.

[0036] The composite filtration unit 3 is followed by a membrane filtration assembly 309, which is composed of hollow fiber membrane elements 310 with a pore size of 0.01-0.1 μm and a membrane area of ​​10-20 m². The membrane assembly is equipped with a chemical cleaning system 311, and the cleaning solution is a citric acid solution with a mass fraction of 2-5%. The chemical cleaning system 311 includes a cleaning pump 312 and a storage tank 313.

[0037] In the above specific embodiments, this invention includes a membrane filtration assembly following the composite filtration unit. Its core technology lies in using the fine filtration effect of hollow fiber membrane elements to further remove tiny particles, dissolved organic matter, and microorganisms from wastewater, ensuring that the effluent quality meets higher standards. Simultaneously, a chemical cleaning system is provided to maintain the performance and lifespan of the membrane elements. During operation, wastewater treated by the composite filtration unit enters the membrane filtration assembly. This assembly is composed of hollow fiber membrane elements with a pore size of 0.01-0.1 μm, effectively trapping suspended particles, bacteria, viruses, and most dissolved organic matter in the water. The membrane area is 10-20 m², providing sufficient filtration area to meet the required flow rate. Wastewater passes through the membrane elements under pressure or vacuum, achieving solid-liquid separation. Filtered clean water flows out from the other end of the membrane element, while the trapped contaminants remain on the membrane surface. To maintain the filtration performance of the membrane elements and extend their lifespan, the membrane assembly is equipped with a chemical cleaning system. This system uses a 2-5% citric acid solution as the cleaning fluid. A cleaning pump draws the solution from the storage tank and circulates it to rinse the membrane element surface. The citric acid solution effectively removes organic pollutants and some inorganic scale from the membrane surface, restoring membrane permeability. The cleaning process can be performed periodically or automatically based on parameters such as membrane pressure differential, ensuring the membrane element remains in good working condition. In summary, this invention's membrane filtration assembly achieves deep purification of wastewater through the fine filtration of hollow fiber membrane elements and maintenance via a chemical cleaning system, ensuring stable and compliant effluent quality while reducing the frequency of membrane element replacement and operating costs. It demonstrates significant practicality and innovation.

[0038] The bottom of the pretreatment unit 1, the multi-stage sedimentation unit 2 and the composite filtration unit 3 are all provided with an exhaust pipe 111, an electric ball valve 112 is installed on the pipe, and a pressure sensor 113 is installed on the connecting pipe between each unit. The sensor has a measurement range of 0-0.6MPa and an accuracy class of 0.5. The pressure sensor 113 is connected to the pipe through a flange 114.

[0039] In the above specific embodiments, this utility model includes drain pipes at the bottom of the pretreatment unit, multi-stage sedimentation unit, and composite filtration unit, with electric ball valves installed on these pipes. Pressure sensors are also installed on the connecting pipes between the units. The core technology lies in enabling convenient draining of the wastewater treatment device and accurate monitoring of its operation, ensuring safe and efficient operation. During operation, when maintenance, repair, or draining is required, controlling the opening and closing of the electric ball valves allows for easy discharge of wastewater or residual liquid from each unit, preventing wastewater accumulation and reducing the risk of corrosion. It also facilitates cleaning and maintenance. The electric ball valves automate the draining operation, improving convenience and safety. Furthermore, pressure sensors are installed on the connecting pipes between units. These sensors have a measurement range of 0-0.6 MPa and an accuracy class of 0.5. The pressure sensors are connected to the pipes via flanges, enabling real-time monitoring of pressure changes within the pipes. During wastewater treatment, pressure sensors transmit monitored pressure data to the intelligent control unit. Operators can adjust the equipment's operating parameters in a timely manner based on this data, ensuring smooth wastewater flow between units and preventing equipment malfunctions or reduced treatment efficiency due to excessively high or low pressure. For example, if a pressure sensor detects an abnormally high pressure in a section of pipe, it may indicate a blockage. Operators can then take timely measures to clear the blockage or adjust the treatment process, thereby ensuring the stable operation of the entire wastewater treatment system. In summary, this invention, by incorporating a drain pipe, an electric ball valve, and a pressure sensor, achieves convenient draining of the wastewater treatment device and accurate monitoring of its operation, improving equipment efficiency and reliability while reducing maintenance costs and operational risks. It demonstrates significant practicality and innovation.

[0040] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these specific embodiments are merely illustrative. Those skilled in the art can omit, substitute, and modify the details of the above methods and systems in various ways without departing from the principles and essence of this utility model. For example, combining the above method steps to perform substantially the same function and achieve substantially the same result according to substantially the same method falls within the scope of this utility model. Therefore, the scope of this utility model is defined only by the appended claims.

Claims

1. A multi-stage sedimentation and filtration industrial wastewater treatment device, characterized in that: It includes a pretreatment unit (1), a multi-stage sedimentation unit (2), a composite filtration unit (3), and an intelligent control unit (4) connected in sequence. The pretreatment unit (1) includes a built-in pH adjustment chamber (100) and a heavy metal scavenging agent dosing device (101). A spiral stirrer (102) is provided at the bottom of the pH adjustment chamber (100). The pretreatment unit (1) also includes a heavy metal ion scavenging module composed of a cylindrical filter cartridge (103) filled with chelating resin. A flow guiding spiral plate (104) is provided inside the filter cartridge (103). The multi-stage sedimentation unit (2) consists of a series of swirling sedimentation chambers (200) and inclined plate sedimentation components (201). The swirling sedimentation chamber (200) is provided with a tangential liquid inlet (202) at the top and a conical sludge collection hopper (203) at the bottom. The inclined plate sedimentation component (201) includes a group of parallel inclined plates (204) with an inclination angle of 60°-75°. The composite filtration unit (3) includes a nano-catalytic filter material layer (300) and an activated carbon adsorption layer (301), with an ultrasonic backwashing device (302) provided between the two layers. The intelligent control unit (4) is connected to each processing unit through a sensor network, which includes a pH sensor (400), a conductivity meter (401), a turbidity meter (402), and a heavy metal ion concentration sensor (403). The intelligent control unit (4) is equipped with a PLC controller (404). The pH adjustment chamber (100) is equipped with a temperature adjustment device (115) on its inner wall. The device consists of a heating tube (116) and a cooling tube (117). The heating tube (116) is a stainless steel electric heating tube, and the cooling tube (117) is a serpentine copper tube structure. The temperature adjustment device (115) is connected to the PLC controller (404) through a temperature controller (118).

2. The industrial wastewater treatment device according to claim 1, characterized in that: The tangential inlet (202) of the vortex sedimentation chamber (200) has a gradually expanding structure, with the ratio of the inner diameter of the inlet end to the inner diameter of the outlet end being 1:1.5-1:

2. A guide vane (205) is provided on the inner side of the inlet, with 4-6 vanes and a vane inclination angle of 30°-45°. The guide vane (205) is connected to the inner wall of the inlet through a fixed bracket (206). The inner wall of the vortex sedimentation chamber (200) is provided with an annular guide ring (216). The guide ring (216) is located 10-15cm below the tangential liquid inlet (202), and the ring width is 5-8cm. The cross-section of the guide ring (216) is a trapezoidal structure with an upper bottom width of 2-3cm, a lower bottom width of 4-5cm, and a height of 3-4cm.

3. The industrial wastewater treatment device of claim 1, wherein: A microbubble generator (207) is provided between the inclined plate groups (204) of the inclined plate sedimentation assembly (201). The device consists of a perforated aeration pipe (208) and an air pump (209). The aeration pipe (208) has a hole diameter of 0.5-1mm and an aeration rate of 0.1-0.3m³ / (m²・h). An inclination adjustment mechanism (210) is provided at the bottom of the inclined plate group (204). The adjustment angle range is ±15°. The inclination adjustment mechanism (210) includes an electric push rod (211) and an angle sensor (212). The inclined plate assembly (204) is equipped with a vibration device (217) at the top. The vibration device (217) consists of a vibration motor (218) and a connecting rod (219). The connecting rod (219) is fixedly connected to the upper surface of the inclined plate assembly (204). The vibration frequency of the vibration motor (218) is 50-100Hz and the amplitude is 0.5-1mm.

4. The industrial wastewater treatment device according to claim 1, characterized in that: An electromagnetic induction coil (303) is provided on the outside of the nanocatalytic filter material layer (300) of the composite filter unit (3). The coil has 200-300 turns and a working current of 1-2A. A TiO2 photocatalytic mesh plate (304) is embedded in the activated carbon adsorption layer (301). The mesh plate has a porosity of ≥70% and a thickness of 5-10mm. The electromagnetic induction coil (303) is fixed to the outer wall of the filter material layer by a bracket (305). A magnetic separator (320) is provided at the bottom of the nano-catalytic filter layer (300). The magnetic separator (320) is composed of a permanent magnet (321) and a filter screen (322). The permanent magnet (321) is fixed to the bottom support (323) of the filter layer. The filter screen (322) has a pore size of 1-2 mm. The magnetic separator (320) is linked and controlled by an electromagnetic induction coil (303).

5. The industrial wastewater treatment device of claim 1, wherein: The transducer array (306) of the ultrasonic backwashing device (302) is arranged in a matrix, with a horizontal spacing of 50-100mm and a vertical spacing of 80-120mm. A reflector plate (307) is provided at the bottom of the transducer. The reflector plate (307) has an angle of 45°-60° with the horizontal plane. The surface of the reflector plate (307) is coated with a titanium alloy reflective layer (308).

6. The industrial wastewater treatment device of claim 1, wherein: The pH adjustment chamber (100) of the pretreatment unit (1) is equipped with a waste gas collection hood (105) at the top. The hood is connected to the activated carbon adsorption tower (107) through a pipe (106). The tower is filled with activated carbon particles (108) with a particle size of 2-4 mm. The heavy metal capture agent dosing device (101) adopts a twin screw pump (109) with a pump flow rate adjustment range of 10-50 L / h. The inlet end of the twin screw pump (109) is equipped with a filter (110).

7. The industrial wastewater treatment device of claim 1, wherein: A flow buffer tank (213) is provided between the multi-stage sedimentation unit (2) and the composite filtration unit (3). The tank volume is 10-15% of the processing flow rate. A baffle plate (214) is provided inside the tank. There are 3-5 baffle plates with a baffle angle of 90°-120°. A sawtooth guide structure (215) is provided on the top of the baffle plate (214).

8. The industrial wastewater treatment device of claim 1, wherein: The intelligent control unit (4) also includes an Internet of Things communication module (405), which adopts the NB-IoT communication standard, has a built-in GPS positioning chip (406), and the PLC controller (404) is connected to an external touch screen (407). The screen size is 7-10 inches and the resolution is ≥800×480 pixels. The touch screen (407) is connected to the PLC controller (404) via a data cable (408). The intelligent control unit (4) is equipped with a backup power module (409), which consists of a lithium battery pack (410) and a charge and discharge controller (411). The lithium battery pack (410) has a capacity of 20-30Ah, and the charge and discharge controller (411) has overcharge and over-discharge protection functions. The backup power module (409) is connected to the PLC controller (404) via a relay (412).

9. The industrial wastewater treatment device of claim 1, wherein: The composite filtration unit (3) is followed by a membrane filtration assembly (309), which is composed of hollow fiber membrane elements (310) with a pore size of 0.01-0.1μm and a membrane area of ​​10-20m². The membrane assembly is equipped with a chemical cleaning system (311), and the cleaning solution is a citric acid solution with a mass fraction of 2-5%. The chemical cleaning system (311) includes a cleaning pump (312) and a storage tank (313).

10. The industrial wastewater treatment device according to claim 1, characterized in that: The bottom of the pretreatment unit (1), the multi-stage sedimentation unit (2) and the composite filtration unit (3) are all provided with an exhaust pipe (111), an electric ball valve (112) is installed on the pipe, and a pressure sensor (113) is installed on the connecting pipe between each unit. The sensor has a measurement range of 0-0.6MPa and an accuracy class of 0.

5. The pressure sensor (113) is connected to the pipe through a flange (114).

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