A device and method for recycling steel wastewater

Abstract

The present invention relates to the field of environmental engineering and pollution control technology, and provides a steel wastewater reuse device and method. The device includes: a pretreatment module, a microporous framework heterogeneous multi-phase catalyst module, a micro-nano bubble ozone deep oxidation reactor module, an advanced oxidation and chemical reduction coordinated treatment module, a secondary treatment and reuse module, a recycled water multi-stage reuse module, a water quality optimization module, a steel wastewater treatment and reuse closed-loop control module, and a carbon emission monitoring and optimization module; the method treats steel wastewater based on each module in the above device. In this way, the requirements of efficient treatment, resource reuse and low energy consumption can be met, and the reuse effect of steel wastewater can be greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of environmental engineering and pollution control, and in particular to a steel wastewater recycling device and method. Background Art

[0002] Among the existing steel wastewater treatment technologies, deep oxidation technology and catalytic treatment technology have been widely used to remove organic matter and toxic substances in steel wastewater. However, the existing technologies still have many shortcomings and it is difficult to simultaneously meet the requirements of efficient treatment, resource recycling and low energy consumption. Summary of the invention

[0003] In a first aspect, an embodiment of the present invention provides a steel wastewater recycling device, the device comprising:

[0004] Pretreatment module, used for pretreatment of steel wastewater to remove particulate matter and suspended matter in the steel wastewater;

[0005] A microporous structured heterogeneous multi-phase catalyst module is used to oxidize organic matter in pretreated steel wastewater through a multi-phase catalyst to remove organic matter in the steel wastewater;

[0006] The micro-nano bubble ozone deep oxidation reactor module is used to deeply oxidize the organic matter remaining in the steel wastewater after oxidation using micro-nano bubbles and ozone, thereby further removing the remaining organic matter in the steel wastewater;

[0007] Advanced oxidation and chemical reduction synergistic treatment module, used to strongly oxidize the refractory substances in the steel wastewater after deep oxidation, and to reduce the toxic heavy metals in the steel wastewater after deep oxidation;

[0008] The secondary treatment and reuse module is used to remove the residues in the steel wastewater after strong oxidation and reduction through physical filtration and secondary chemical oxidation, and treat the current steel wastewater to the reuse standard through the membrane system;

[0009] The recycled water multi-stage reuse module is used to perform multi-stage filtration and storage and distribution of water that meets the reuse standards through a multi-stage filtration and automated distribution system;

[0010] The water quality optimization module is used to monitor water quality in real time, provide feedback, and dynamically adjust ozone dosage and catalyst status. Through real-time monitoring and feedback control, the operating parameters of each module that treats steel wastewater can be dynamically adjusted;

[0011] The closed-loop control module for steel wastewater treatment and reuse is used to monitor, provide feedback and adjust the operating status of each module that treats steel wastewater;

[0012] Carbon emission monitoring and optimization module is used to monitor and optimize carbon emissions during steel wastewater treatment.

[0013] In some implementations of the first aspect, the pretreatment module includes: a dynamic screening unit, a flocculation sedimentation unit, and a grid cleaning unit;

[0014] The dynamic screening unit uses an electric adjustment system and a screen to adjust the size of the screen holes in real time according to the size and quantity of particles in the water flow; the electric adjustment system is triggered by sensing flow and pressure sensors; the screen is made of metal alloy;

[0015] The flocculation and sedimentation unit automatically adds flocculants through a precision pump, uses the flocculants to form flocs with suspended matter in the steel wastewater, and further promotes the mutual attraction of suspended matter and the formation of flocs through directional vibration of ultrasonic equipment. After the flocculation reaction, the flocs settle in the sedimentation tank and are automatically removed by the screw conveyor;

[0016] The grille cleaning unit uses a high-speed water jet to flush the grid and automatically removes attached dirt through a rotating brush. During the cleaning process, a pressure sensor monitors the degree of grid clogging. Once it detects that the degree of clogging reaches the blocking condition, the cleaning operation is triggered.

[0017] In some implementations of the first aspect, the microporous framework heterogeneous multi-phase catalyst module includes: a catalyst carrier unit, an electrochemical assisted catalytic unit, and a catalyst self-cleaning unit;

[0018] The catalyst carrier unit is a high-porosity carbon-based structure manufactured by 3D printing technology. When in use, metal particles are evenly attached to the carbon substrate through chemical vapor deposition to form a multi-catalytic system with a high potential difference.

[0019] The embedded electrodes of the electrochemical assisted catalytic unit are made of stainless steel or titanium alloy, and a pulse current is used to generate a local electric field, causing the ions in the water to undergo redox reactions;

[0020] The catalyst self-cleaning unit is controlled by an embedded pipe network and automatic valves. When the catalyst surface is covered with dirt, backwashing is performed to spray high-pressure water in the reverse direction through the catalyst layer to remove deposits. The cleaning cycle is controlled by a surface contamination detection sensor.

[0021] In some implementations of the first aspect, the micro-nano bubble ozone deep oxidation reactor module includes: a gas-liquid mixing enhancement unit, a micro-nano bubble generation unit, and a high-frequency ultrasonic bubble stabilization unit;

[0022] The gas-liquid mixing enhancement unit mixes water and ozone gas in the reactor through a rotating gas-liquid mixer; the rotation speed of the gas-liquid mixer is controlled by the gas-liquid mixing enhancement unit through a variable frequency drive;

[0023] The ceramic membrane of the micro-nano bubble generation unit generates nano-scale micropores through laser drilling technology. Ozone generates micro-nano bubbles through the micropores. The size and distribution of the bubbles are controlled by adjusting the pore size and air pressure of the ceramic membrane.

[0024] The high-frequency ultrasonic bubble stabilization unit uses a high-frequency ultrasonic vibration system to generate ultrasonic waves, which allows the bubbles to remain in the water for a longer time, and uses ultrasonic waves to form micro-turbulence between the bubbles and the pollutants.

[0025] In some implementations of the first aspect, the advanced oxidation and chemical reduction coordinated processing module includes: a UV photocatalytic unit, an electrochemical reduction unit;

[0026] The UV photocatalytic unit uses ultraviolet light with a wavelength of 254nm or 185nm to irradiate the water, reacting with ozone to produce strong oxidants, further oxidizing organic matter;

[0027] The electrochemical reduction unit installs insoluble electrodes and applies a constant current to reduce heavy metal ions in steel wastewater into metal elements, which are deposited on the electrode surface. The metal deposits are then automatically cleaned by a scraper, and the voltage and current are automatically adjusted.

[0028] In some implementations of the first aspect, the secondary treatment and reuse module includes: a two-stage ozone oxidation unit, an ultrafiltration membrane unit, and a nanofiltration membrane unit;

[0029] The two-stage ozone oxidation unit uses ozone generated by an ozone generator to treat steel wastewater with low concentrations in the first stage to remove organic matter; in the second stage, high concentrations of ozone are used to treat residual pollutants, and the ozone dosage in each stage is adjusted by automatically adjusting the output voltage and flow of the ozone generator;

[0030] The ultrafiltration membrane unit uses hollow fiber ultrafiltration membrane, the material used is modified polyethylene, and is equipped with an automatic backwashing system, which uses osmotic pressure difference and hydraulic backwashing for cleaning;

[0031] The nanofiltration membrane of the nanofiltration membrane unit is made of polyamide composite membrane material. The pore size of the nanofiltration membrane is between 1-5 nanometers. The surface of the membrane is hydrophilic, and the pressure and flow are adjusted through a real-time monitoring system.

[0032] In some implementations of the first aspect, the recycled water multi-stage reuse module includes: a multi-stage filtration unit, a recycled water quality classification unit, and an automated membrane cleaning unit;

[0033] The multi-stage filtration unit integrates ultrafiltration, nanofiltration and reverse osmosis systems. Each stage of the membrane filtration system controls different pressures and flows through PLC. The first stage of ultrafiltration removes suspended particles, the second stage of nanofiltration removes salts and organic matter, and the last stage of reverse osmosis makes the effluent meet the reuse standards. Each stage is monitored in real time through pressure sensors and flow meters.

[0034] The recycled water quality classification unit stores the filtered recycled water in grades according to the water quality requirements, and distributes the water that meets different water quality standards to various industrial uses through electric valves and automated distribution systems; the water storage tank is equipped with an online water quality monitoring sensor to report the water quality status in real time and automatically update the water quality classification;

[0035] When the automatic membrane cleaning unit detects membrane contamination or blockage, it starts the automatic cleaning program. The membrane cleaning process includes hydraulic backwashing, chemical cleaning and gas flushing. Chemical cleaning uses weak acid or weak alkaline solution.

[0036] In some implementations of the first aspect, the water quality optimization module includes: a sensor monitoring unit, a machine learning optimization unit, and an emergency processing unit;

[0037] The sensor monitoring unit is equipped with various types of sensors, including spectral sensors, conductivity sensors, temperature sensors, and flow rate sensors;

[0038] The machine learning optimization unit analyzes historical data and real-time sensor data through machine learning algorithms, automatically adjusts the ozone dosage and catalyst update frequency in the reactor, and performs adaptive learning of water quality parameters;

[0039] The emergency treatment unit combines historical data with real-time data to predict future water quality fluctuations, and adjusts the operating conditions of each module treating steel wastewater in advance based on the prediction results. When an emergency is detected, the oxidant dosage is increased or the bypass treatment process is started.

[0040] In some possible implementations of the first aspect, the closed-loop control module for steel wastewater treatment and reuse includes: an adaptive control unit, an energy consumption optimization unit, and a feedback optimization unit;

[0041] The adaptive control unit collects sensor data from each steel wastewater treatment module through the central processor, including flow rate, pressure, temperature, ozone concentration, and catalyst status; and dynamically adjusts various parameters through the PID algorithm to make each steel wastewater treatment module operate in the optimal state; it also conducts trend prediction based on historical data and adjusts the operation mode of the steel wastewater reuse device in advance;

[0042] The energy consumption optimization unit combines sensor data to calculate the energy consumption of each module that treats steel wastewater in real time, including the power consumption of the ozone generator, the mechanical energy consumption of the pump and the mixer, and automatically adjusts the power output of the equipment through energy consumption optimization algorithms.

[0043] The feedback optimization unit uses a closed-loop feedback system to automatically detect the treatment effect during the treatment process and adjust the operating parameters based on real-time feedback data;

[0044] The carbon emission monitoring and optimization module includes: carbon emission monitoring unit, renewable energy integration unit, and carbon emission optimization unit;

[0045] The carbon emission monitoring unit monitors the carbon emission level in the steel wastewater treatment process in real time through the installed carbon dioxide and greenhouse gas sensors;

[0046] The renewable energy integration unit integrates solar photovoltaic panels and energy storage battery systems, providing power to the equipment through inverters and power management systems. The solar panels automatically adjust their angles according to the light intensity, and the energy storage battery system provides power support at night or when there is insufficient light.

[0047] The carbon emission optimization unit adjusts the operating mode of the steel wastewater reuse device through an automated algorithm based on carbon emission monitoring data.

[0048] In a second aspect, an embodiment of the present invention provides a method for recycling steel wastewater, which is applied to the steel wastewater recycling device as described above, comprising:

[0049] Pretreatment step: The pretreatment module pre-treats the steel wastewater to remove particulate matter and suspended matter in the steel wastewater;

[0050] Catalytic oxidation treatment step: the microporous structure heterogeneous multi-phase catalyst module oxidizes the organic matter in the pretreated steel wastewater through the multi-phase catalyst to remove the organic matter in the steel wastewater;

[0051] Ozone deep oxidation step: The micro-nano bubble ozone deep oxidation reactor module uses micro-nano bubbles and ozone to deeply oxidize the remaining organic matter in the steel wastewater after oxidation, further removing the remaining organic matter in the steel wastewater;

[0052] Advanced oxidation and chemical reduction synergistic treatment steps: The advanced oxidation and chemical reduction synergistic treatment module strongly oxidizes the refractory substances in the steel wastewater after deep oxidation, and reduces the toxic heavy metals in the steel wastewater after deep oxidation;

[0053] Secondary treatment and reuse step: The secondary treatment and reuse module removes the residues in the steel wastewater after strong oxidation and reduction through physical filtration and secondary chemical oxidation, and treats the current steel wastewater to the reuse standard through the membrane system;

[0054] Multi-stage reuse steps of recycled water: The multi-stage reuse module of recycled water performs multi-stage filtration and storage and distribution of water that meets the reuse standards through a multi-stage filtration and automated distribution system;

[0055] Monitoring and adaptive adjustment steps: The water quality optimization module monitors the water quality in real time, feedbacks information, and dynamically adjusts the ozone dosage and catalyst status. Through real-time monitoring and feedback control, the operating parameters of each module that treats steel wastewater are dynamically adjusted;

[0056] Closed-loop control steps: The closed-loop control module for steel wastewater treatment and reuse monitors, provides feedback and adjusts the operating status of each module that treats steel wastewater;

[0057] Carbon emission monitoring and optimization step: The carbon emission monitoring and optimization module monitors and optimizes the carbon emissions during the steel wastewater treatment process.

[0058] In summary, according to the embodiments of the present invention, at least the following technical effects are achieved:

[0059] 1. The present invention designs a high-porosity carbon material as a carrier, dopes it with multiple metal components (such as iron, cobalt, and copper), and improves the catalyst activity through a 3D mesh structure and electrochemical auxiliary technology. This multi-component catalyst can significantly improve the reaction efficiency, and regularly remove sediments through an automatic backwashing system to extend the service life of the catalyst. It can not only continuously and efficiently remove organic pollutants, but also reduce the frequency of catalyst replacement and reduce operating costs.

[0060] 2. The ceramic membrane of the micro-nano bubble generating unit of the present invention has nano-scale micropores generated by high-precision laser drilling technology, based on which the uniform distribution and efficient mass transfer of ozone bubbles can be achieved, so that ozone can fully contact with pollutants in water and maximize the oxidation effect. On this basis, combined with high-frequency ultrasonic assistance, the stability of the bubbles is further improved.

[0061] 3. The present invention introduces a water quality optimization module based on simulation and machine learning, which monitors the effluent quality in real time through sensors and automatically adjusts the ozone dosage, catalyst status and reactor operating conditions in combination with deep learning algorithms. The module can dynamically adjust the treatment process according to changes in water quality to ensure that the treatment effect is always maintained at the best state.

[0062] 4. The present invention organically links various processing modules through the closed-loop control module of steel wastewater treatment and reuse, realizes adaptive adjustment and optimization among various modules, and can dynamically adjust the operating parameters of each module according to real-time monitoring data, such as ozone dosage, flow rate, etc., to ensure the optimization of overall operating efficiency and reduce unnecessary energy waste.

[0063] 5. The present invention ensures high quality of effluent through secondary treatment and reuse modules, and combines with the multi-stage reuse module of recycled water to automatically distribute recycled water to different industrial uses according to the water quality level, thus realizing the reuse of water resources to the maximum extent. At the same time, the combined use of ultrafiltration membrane and nanofiltration membrane ensures the long-term stability of water quality and meets high-standard reuse requirements.

[0064] It should be understood that the contents described in the summary of the invention are not intended to limit the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0065] The above and other features, advantages and aspects of the embodiments of the present invention will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. The accompanying drawings are used to better understand the present solution and do not constitute a limitation of the present invention. In the accompanying drawings, the same or similar reference numerals represent the same or similar elements, wherein:

[0066] Figure 1 A structural diagram of a steel wastewater recycling device provided by an embodiment of the present invention;

[0067] Figure 2 A structural diagram of a preprocessing module provided by an embodiment of the present invention;

[0068] Figure 3 A structural diagram of a microporous framework type heterogeneous multi-phase catalyst module provided in an embodiment of the present invention;

[0069] Figure 4 A structural diagram of a micro-nano bubble ozone deep oxidation reactor module provided in an embodiment of the present invention;

[0070] Figure 5 A structural diagram of an advanced oxidation and chemical reduction coordinated processing module provided in an embodiment of the present invention;

[0071] Figure 6 A structural diagram of a secondary processing and recycling module provided in an embodiment of the present invention;

[0072] Figure 7 A structural diagram of a multi-stage recycled water reuse module provided by an embodiment of the present invention;

[0073] Figure 8A structural diagram of a water quality optimization module provided by an embodiment of the present invention;

[0074] Fig. 9 A structural diagram of a closed-loop control module for steel wastewater treatment and reuse provided by an embodiment of the present invention;

[0075] Fig.10 A structural diagram of a carbon emission monitoring and optimization module provided in an embodiment of the present invention;

[0076] Fig.11 A flow chart of a method for recycling steel wastewater provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0077] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0078] In addition, the term "and / or" in the present invention is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in the present invention generally indicates that the associated objects before and after are in an "or" relationship.

[0079] In order to solve the technical problems in the background technology, the embodiment of the present invention provides a steel wastewater recycling device and method. The following is a detailed description of a steel wastewater recycling device and method provided by the embodiment of the present invention through specific embodiments in conjunction with the accompanying drawings.

[0080] Figure 1 A structural diagram of a steel wastewater recycling device provided by an embodiment of the present invention, such as Figure 1 As shown, the steel wastewater reuse device may include:

[0081] The pretreatment module is used to pretreat steel wastewater, remove particulate matter and suspended matter in the steel wastewater, and provide relatively clean water for subsequent oxidation and catalytic reactions. It corresponds to the first step of steel wastewater treatment and is reasonably placed at the front end of the entire device.

[0082] Its relationship with other modules is: the pretreatment module provides the basis for subsequent catalytic reactions and deep oxidation, which ensures that large particles and impurities are removed, thereby reducing the load on subsequent systems.

[0083] The microporous structure heterogeneous multi-catalyst module is used to oxidize organic matter in the pre-treated steel wastewater through multi-catalysts to remove organic matter in the steel wastewater. Since the catalyst has high requirements for water quality, it is reasonable to place it after the pre-treatment module.

[0084] Its relationship with other modules is as follows: after pretreatment, the microporous structure heterogeneous multi-catalyst module further treats the organic matter in the steel wastewater to prepare for subsequent deep oxidation.

[0085] The micro-nano bubble ozone deep oxidation reactor module is used to deeply oxidize the remaining organic matter in the steel wastewater after oxidation using micro-nano bubbles and ozone, further removing the remaining organic matter in the steel wastewater and improving the oxidation efficiency. It should be placed after the microporous structure heterogeneous multi-phase catalyst module, because the pollutants treated with the catalyst first can react with ozone more effectively.

[0086] Its relationship with other modules is as follows: Ozone deep oxidation treats the remaining organic matter to ensure that the hard-to-degrade organic matter is removed to the greatest extent. This module works in conjunction with the microporous framework heterogeneous multi-catalyst module to complete the oxidation of organic matter.

[0087] Advanced oxidation and chemical reduction synergistic treatment module is used to strongly oxidize the refractory substances (such as complex organic matter) in the steel wastewater after deep oxidation, and to reduce the toxic heavy metals in the steel wastewater after deep oxidation. It should be placed after all major oxidation modules and before the secondary treatment and reuse modules for the treatment of special pollutants.

[0088] Its relationship with other modules is as follows: this module treats specific pollutants that cannot be completely treated by the previous modules, especially difficult-to-degrade substances and toxic heavy metals. It is closely connected with the secondary treatment and reuse module to ensure that the final effluent meets the recycled water standards.

[0089] The secondary treatment and reuse module is used to remove the residues in the steel wastewater after strong oxidation and reduction through physical filtration and secondary chemical oxidation, and treat the current steel wastewater to the reuse standard through the membrane system. It should be reasonably placed after all the treatment modules mentioned above as the final purification step of steel wastewater.

[0090] Its relationship with other modules is as follows: This module further purifies the residual substances after deep oxidation treatment, and ensures that the effluent meets the standards through physical filtration and secondary chemical oxidation. It works together with all the previous treatment modules to finally output reusable water.

[0091] The recycled water multi-stage reuse module is used to perform multi-stage filtration and storage and distribution of water that meets the reuse standards through a multi-stage filtration and automated distribution system. This module should be reasonably placed after all treatment modules and used for the reuse of water after it meets the water quality standards.

[0092] Its relationship with other modules is as follows: it ensures that the quality of recycled water meets the needs of different industries through multi-stage filtration and automated distribution systems, and it works in conjunction with the previous treatment modules to ensure the quality of effluent water.

[0093] The water quality optimization module is used to monitor water quality in real time, feedback information, and dynamically adjust parameters such as ozone dosage and catalyst status. Through real-time monitoring and feedback control, the operating parameters of each module treating steel wastewater are dynamically adjusted. This module is a monitoring and control module throughout the entire device and should continue to work during the entire steel wastewater treatment process.

[0094] Its relationship with other modules is as follows: This module dynamically adjusts the operating parameters of each processing module through real-time monitoring and feedback control to optimize the efficiency and energy consumption of the entire device. It is closely related to all pre- and post-processing modules and plays a role in real time throughout the entire processing process.

[0095] The closed-loop control module for steel wastewater treatment and reuse is used to monitor, feedback and adjust the operating status of each module that treats steel wastewater. This module covers the automation control and feedback optimization of the entire device. It should run through all treatment modules to monitor and optimize the operating parameters of each link in real time.

[0096] Its relationship with other modules is as follows: This module is the core control module of the entire device, responsible for monitoring, feedback and adjustment of the operating status of each processing module to ensure the efficiency and stability of the processing process. It has direct interaction with each module to optimize the entire processing flow in real time.

[0097] The carbon emission monitoring and optimization module is used to monitor and optimize the carbon emission in the steel wastewater treatment process and link with the renewable energy system. As it is related to energy consumption and environmental impact, it should play a role in the energy consumption control and feedback of the entire device and be reasonably placed in the upper management of all treatment modules.

[0098] Its relationship with other modules is as follows: This module is linked with the renewable energy system to optimize the energy consumption and carbon emissions in the entire steel wastewater treatment process. It is closely related to the energy consumption of each treatment module and minimizes carbon emissions by reducing the total energy consumption of the device.

[0099] In order to facilitate further understanding, the following Figure 2-10 Expand the above modules:

[0100] like Figure 2 As shown, the pretreatment module may include: a dynamic screening unit, a flocculation sedimentation unit, and a grid cleaning unit.

[0101] The dynamic screening unit uses an electric adjustment system and a screen to adjust the size of the screen holes in real time according to the size and number of particles in the water flow. This adjustment is triggered by inductive flow and pressure sensors. Specifically, when larger particles are detected, the screen holes will be enlarged to reduce clogging; when smaller particles are detected, the screen holes will be reduced to filter out more fine impurities. The screen is made of corrosion-resistant metal alloy to ensure long-term stability.

[0102] The flocculation sedimentation unit automatically adds flocculants through a precision pump, uses the flocculants to form flocs with suspended matter in the steel wastewater, and further promotes the mutual attraction of suspended matter and the formation of flocs through directional vibration of ultrasonic equipment. After the flocculation reaction, the flocs settle in a specially designed sedimentation tank, and the mud at the bottom is automatically removed by a screw conveyor.

[0103] The grille cleaning unit utilizes the automatic cleaning system on the dynamic grille, uses a high-speed water jet to flush the grid, and automatically removes attached dirt through a rotating brush. During the cleaning process, the pressure sensor monitors the degree of grid clogging, and the cleaning operation is triggered once it is detected that the degree of clogging reaches the blocking condition.

[0104] like Figure 3 As shown, the microporous framework type heterogeneous multi-phase catalyst module may include: a catalyst carrier unit, an electrochemical assisted catalytic unit, and a catalyst self-cleaning unit.

[0105] The catalyst carrier unit is a high-porosity carbon-based structure manufactured using 3D printing technology. These pores not only increase the specific surface area, but also provide fixed points for the loading of metal elements such as iron, cobalt, and copper. When in use, the metal particles are evenly attached to the carbon substrate through chemical vapor deposition (CVD), forming a multi-catalytic system with a significant potential difference.

[0106] The embedded electrodes of the electrochemically assisted catalytic unit are made of stainless steel or titanium alloy. The pulsed current generates a local electric field to cause the ions in the water to undergo redox reactions. The unit can enhance the reaction activity of the catalyst surface by adjusting the voltage and current frequency, and selectively treat different pollutants.

[0107] The catalyst self-cleaning unit is controlled by an embedded pipe network and automatic valves. When the catalyst surface is covered with dirt, backwashing is performed to spray high-pressure water through the catalyst layer in the opposite direction to remove deposits. The cleaning cycle is controlled by a surface contamination detection sensor to ensure that the catalyst operates in an efficient state.

[0108] like Figure 4 As shown, the micro-nano bubble ozone deep oxidation reactor module may include: a gas-liquid mixing enhancement unit, a micro-nano bubble generation unit, and a high-frequency ultrasonic bubble stabilization unit.

[0109] The gas-liquid mixing enhancement unit mixes water and ozone gas in the reactor through a high-speed rotating gas-liquid mixer. The turbulence increases the dispersion of bubbles, allowing the bubbles to fully contact with organic matter in the water. The unit uses a variable frequency drive to control the rotation speed, thereby accurately controlling the efficiency of gas-liquid mixing.

[0110] The ceramic membrane of the micro-nano bubble generation unit generates nano-scale micropores through high-precision laser drilling technology. Ozone generates micro-nano bubbles through the micropores. The size and distribution of the bubbles are controlled by adjusting the pore size and air pressure of the ceramic membrane to ensure the optimization of ozone mass transfer efficiency.

[0111] The high-frequency ultrasonic bubble stabilization unit uses a high-frequency ultrasonic vibration system to generate ultrasonic waves. The vibration frequency can be adjusted through the control system to enhance the stability of the bubbles, allowing the bubbles to remain in the water for a longer time. Ultrasonic waves can also form micro-turbulence between the bubbles and pollutants, increasing the dispersion and mass transfer rate of pollutants.

[0112] like Figure 5 As shown, the advanced oxidation and chemical reduction coordinated processing module may include: a UV photocatalytic unit and an electrochemical reduction unit.

[0113] The UV photocatalytic unit arranges high-energy ultraviolet lamps in the reactor and uses ultraviolet rays with a wavelength of 254nm or 185nm to irradiate the water, which reacts with ozone to produce strong oxidants (such as hydroxyl radicals) to further oxidize organic matter. The UV photocatalytic unit is also equipped with optical sensors to ensure that the ultraviolet lamps operate at optimal power and regularly self-calibrate the light output power.

[0114] The electrochemical reduction unit installs an insoluble electrode (such as a titanium electrode) and applies a constant current to reduce the heavy metal ions in the steel wastewater into metal elements, which are deposited on the electrode surface. The metal deposits are then automatically cleaned by a scraper. The unit can automatically adjust the voltage and current to adapt to different pollutant reduction needs.

[0115] like Figure 6 As shown, the secondary treatment and reuse module may include: a two-stage ozone oxidation unit, an ultrafiltration membrane unit, and a nanofiltration membrane unit.

[0116] The two-stage ozone oxidation unit uses ozone generated by an ozone generator to treat steel wastewater with low-concentration ozone in the first stage to remove most of the organic matter; in the second stage, high-concentration ozone is used to treat residual pollutants. The output voltage and flow of the ozone generator are automatically adjusted to flexibly adjust the ozone dosage in each stage to ensure maximum removal rate.

[0117] The ultrafiltration membrane unit adopts hollow fiber ultrafiltration membrane, the material used is modified polyethylene, which has good anti-pollution ability, and is equipped with an automatic backwashing system, which uses osmotic pressure difference and hydraulic backwashing for cleaning to maintain long-term and efficient operation of the membrane system.

[0118] The nanofiltration membrane of the nanofiltration membrane unit is made of polyamide composite membrane material. The pore size of the nanofiltration membrane is between 1-5 nanometers, which can effectively remove soluble salts and residual organic matter in the water. The surface of the membrane is hydrophilic treated to reduce the adhesion of pollutants, and the pressure and flow are adjusted through the real-time monitoring system to extend the service life of the membrane.

[0119] like Figure 7 As shown, the recycled water multi-stage reuse module may include: a multi-stage filtration unit, a recycled water quality classification unit, and an automatic membrane cleaning unit.

[0120] The multi-stage filtration unit integrates ultrafiltration, nanofiltration and reverse osmosis systems. Each stage of the membrane filtration system controls different pressures and flows through PLC. The first stage of ultrafiltration removes suspended particles, the second stage of nanofiltration removes salts and organic matter, and the final stage of reverse osmosis makes the effluent meet the reuse standards. Each stage is monitored in real time by pressure sensors and flow meters.

[0121] The recycled water quality classification unit stores the filtered recycled water in grades according to the water quality requirements, and distributes the water that meets different water quality standards to various industrial uses through electric valves and automated distribution systems. The water storage tank is equipped with an online water quality monitoring sensor to report the water quality status in real time and automatically update the water quality classification.

[0122] When the automatic membrane cleaning unit detects membrane contamination or blockage, it starts the automatic cleaning program. The membrane cleaning process includes hydraulic backwashing, chemical cleaning (using weak acid or weak alkaline solution) and gas flushing to ensure the long-term stable operation of the membrane system.

[0123] like Figure 8 As shown, the water quality optimization module may include: a sensor monitoring unit, a machine learning optimization unit, and an emergency processing unit.

[0124] The sensor monitoring unit is equipped with various types of sensors, including spectral sensors, conductivity sensors, temperature sensors, and flow rate sensors. These sensors transmit data to the central control system in real time through wireless transmission modules, forming a monitoring network covering the entire device.

[0125] The machine learning optimization unit analyzes historical data and real-time sensor data through machine learning algorithms (such as deep neural networks or random forest algorithms), automatically adjusts the ozone dosage and catalyst update frequency in the reactor, and adaptively learns water quality parameters to improve overall treatment efficiency and reduce energy consumption.

[0126] The emergency treatment unit combines historical data with real-time data to predict future water quality fluctuations and adjusts the operating conditions of each module that treats steel wastewater in advance based on the prediction results. When an emergency is detected (such as a sudden excess of toxic substances), the oxidant dosage is increased or the bypass treatment process is started.

[0127] like Fig. 9 As shown, the closed-loop control module for steel wastewater treatment and reuse may include: an adaptive control unit, an energy consumption optimization unit, and a feedback optimization unit.

[0128] The adaptive control unit collects sensor data from each module that treats steel wastewater through a central processor (such as a PLC or DCS control system), including parameters such as flow rate, pressure, temperature, ozone concentration, and catalyst status, and then dynamically adjusts each parameter through a PID algorithm to enable each module that treats steel wastewater to operate in the optimal state. Trend predictions can also be made based on historical data to adjust the operating mode of the device in advance to ensure that the stability of steel wastewater treatment can be maintained even in emergencies.

[0129] The energy consumption optimization unit combines sensor data to calculate the energy consumption of each module that treats steel wastewater in real time, including the power consumption of the ozone generator, the mechanical energy consumption of the pump and the mixer, and calculates through energy consumption optimization algorithms (such as optimization methods based on objective functions) to automatically adjust the power output of the equipment to avoid energy waste. The unit can also be linked with the renewable energy system to give priority to the use of stored renewable energy to reduce carbon emissions.

[0130] The feedback optimization unit uses a closed-loop feedback system to automatically detect the treatment effect during the treatment process and adjust the operating parameters based on real-time feedback data. For example, if it detects that the treated water quality does not meet the standard, it will immediately increase the amount of ozone added or start the secondary treatment process to ensure that the effluent always meets the standard.

[0131] like Fig.10 As shown, the carbon emission monitoring and optimization module may include: a carbon emission monitoring unit, a renewable energy integration unit, and a carbon emission optimization unit.

[0132] The carbon emission monitoring unit installs carbon dioxide and greenhouse gas sensors at multiple key nodes of the device to monitor the carbon emission level in real time during the treatment process. These sensors mainly use optical absorption technology (such as non-dispersive infrared sensor, NDIR) to accurately detect the emission gas and send the data to the central control system for analysis through wireless transmission.

[0133] The renewable energy integration unit integrates solar photovoltaic panels and energy storage battery systems, providing power to the equipment through inverters and power management systems. The solar panels automatically adjust their angles according to light intensity to improve power generation efficiency, and the energy storage battery system provides power support at night or when there is insufficient light, ensuring that the device operates continuously driven by renewable energy.

[0134] The carbon emission optimization unit adjusts the operation mode of the device through an automated algorithm based on carbon emission monitoring data. For example, when higher carbon emissions are detected, the device will increase the proportion of renewable energy use or reduce the power output of certain high-energy-consuming units (such as ozone generators or electrochemical units). In addition, the unit can dynamically adjust the operating time and mode according to different working conditions to ensure that carbon emissions are reduced without affecting the treatment effect of steel wastewater.

[0135] The above is an introduction to the device embodiment. The following is a method embodiment to further illustrate the solution of the present invention.

[0136] Fig.11 A flowchart of a steel wastewater recycling method provided in an embodiment of the present invention, which can be applied to the above-mentioned steel wastewater recycling device, includes:

[0137] S1: Pretreatment step: The pretreatment module pretreats the steel wastewater to remove particulate matter and suspended matter in the steel wastewater.

[0138] S2: Catalytic oxidation treatment step: The microporous structure heterogeneous multi-catalyst module oxidizes the organic matter in the pretreated steel wastewater through the multi-catalyst to remove the organic matter in the steel wastewater.

[0139] S3: Ozone deep oxidation step: The micro-nano bubble ozone deep oxidation reactor module uses micro-nano bubbles and ozone to deeply oxidize the remaining organic matter in the steel wastewater after oxidation, thereby further removing the remaining organic matter in the steel wastewater.

[0140] S4: Advanced oxidation and chemical reduction synergistic treatment step: The advanced oxidation and chemical reduction synergistic treatment module strongly oxidizes the difficult-to-degrade substances in the steel wastewater after deep oxidation, and reduces the toxic heavy metals in the steel wastewater after deep oxidation.

[0141] S5: Secondary treatment and reuse step: The secondary treatment and reuse module removes the residues in the steel wastewater after strong oxidation and reduction through physical filtration and secondary chemical oxidation, and treats the current steel wastewater to the reuse standard through a membrane system.

[0142] S6: Multi-stage reuse step of recycled water: The multi-stage reuse module of recycled water performs multi-stage filtration and storage and distribution on water that meets the reuse standards through a multi-stage filtration and automated distribution system.

[0143] S7: Monitoring and adaptive adjustment steps: The water quality optimization module monitors the water quality and feedback information in real time, and dynamically adjusts the ozone dosage and catalyst status. Through real-time monitoring and feedback control, the operating parameters of each module that treats steel wastewater are dynamically adjusted.

[0144] S8: Closed-loop control step: The closed-loop control module for steel wastewater treatment and reuse monitors, provides feedback and adjusts the operating status of each module for treating steel wastewater.

[0145] S9: Carbon emission monitoring and optimization step: The carbon emission monitoring and optimization module monitors and optimizes the carbon emissions during the steel wastewater treatment process.

[0146] For further understanding, the above steps are explained below with an example:

[0147] S1: Preprocessing steps:

[0148] The steel wastewater first enters the dynamic screening unit, which electrically adjusts the aperture of the screen to adapt to the size of the particles in the water and removes large suspended particles;

[0149] Then it enters the flocculation and sedimentation unit, where high-efficiency flocculants are automatically added and ultrasonic waves are used to promote the aggregation of particles, forming large flocs that settle at the bottom. The mud at the bottom is cleaned by an automatic screw conveyor.

[0150] The grille cleaning unit removes large contaminants and cleans them automatically.

[0151] S2: Catalytic oxidation treatment step:

[0152] After pretreatment, the steel wastewater enters the microporous framework heterogeneous multi-phase catalyst module. In the high-porosity carbon-based catalyst and electrochemical-assisted catalyst reactor, the refractory organic matter in the water is effectively removed.

[0153] The pulsed current generated by the embedded electrodes further enhances the reaction activity, targeting the selective removal of specific pollutants, and the backwash system regularly cleans deposits from the catalyst surface.

[0154] S3: Ozone deep oxidation step:

[0155] The steel wastewater enters the micro-nano bubble ozone deep oxidation reactor, and the ozone and water are fully mixed through the gas-liquid mixing enhancement unit;

[0156] The micro-nano bubbles generated by the micro-nano bubble generation unit are released into the water through the ceramic membrane, oxidizing the remaining organic matter in the water, and using high-frequency ultrasound to extend the reaction time of the bubbles in the water.

[0157] S4: Advanced oxidation and chemical reduction synergistic treatment steps:

[0158] For toxic substances and heavy metals that are difficult to oxidize, steel wastewater enters the advanced oxidation and chemical reduction synergistic treatment module. In the UV photocatalytic unit, ultraviolet light uses a specific wavelength to work together with hydroxyl radicals produced by ozone to further oxidize stubborn organic matter.

[0159] For heavy metals in steel wastewater, the electrochemical reduction unit reduces heavy metal ions into non-toxic substances through the current generated by the electrodes, which are deposited on the electrode surface and cleaned regularly.

[0160] S5: Secondary treatment and reuse steps:

[0161] After multiple catalytic and deep oxidation treatments, the steel wastewater enters the secondary treatment and reuse module, where it is first further oxidized by a dynamic two-stage ozone oxidation unit;

[0162] The ultrafiltration membrane unit and the nanofiltration membrane unit physically filter the water. The ultrafiltration membrane removes suspended particles and fine pollutants in the water, while the nanofiltration membrane filters soluble salts and organic matter.

[0163] S6: Multi-stage reuse steps of recycled water:

[0164] The water treated in step S5 enters the recycled water multi-stage reuse module and is stored in different grades according to different water quality requirements. The automated distribution system distributes the water to different industrial uses according to the water quality level.

[0165] S7: Monitoring and adaptive adjustment steps:

[0166] The sensor monitoring unit monitors the pollutant concentration, temperature, and pH value in the steel wastewater in real time and transmits the data to the central processor;

[0167] The machine learning optimization unit in the CPU analyzes historical and real-time data through deep learning algorithms, predicts water quality fluctuations, and adaptively adjusts ozone dosage and catalyst status;

[0168] When excessive pollutants are detected, the treatment conditions are immediately adjusted to start secondary oxidation or bypass processes.

[0169] S8: Closed-loop control steps:

[0170] The entire steel wastewater treatment process is managed by the steel wastewater treatment and reuse closed-loop control module, which uses PID control and model predictive control algorithms to adjust the ozone dosage, catalyst status, and flow rate in real time;

[0171] The energy consumption optimization unit calculates the energy consumption of each module in real time and optimizes the energy consumption using genetic algorithm or particle swarm optimization algorithm.

[0172] S9: Carbon emission monitoring and optimization steps:

[0173] During the steel wastewater treatment process, the carbon emission optimization unit automatically adjusts the operating mode of the device based on sensor data.

[0174] In summary, according to the embodiments of the present invention, at least the following technical effects are achieved:

[0175] 1. The present invention designs a high-porosity carbon material as a carrier, dopes it with multiple metal components (such as iron, cobalt, and copper), and improves the catalyst activity through a 3D mesh structure and electrochemical auxiliary technology. This multi-component catalyst can significantly improve the reaction efficiency, and regularly remove sediments through an automatic backwashing system to extend the service life of the catalyst. It can not only continuously and efficiently remove organic pollutants, but also reduce the frequency of catalyst replacement and reduce operating costs.

[0176] 2. The ceramic membrane of the micro-nano bubble generating unit of the present invention has nano-scale micropores generated by high-precision laser drilling technology, based on which the uniform distribution and efficient mass transfer of ozone bubbles can be achieved, so that ozone can fully contact with pollutants in water and maximize the oxidation effect. On this basis, combined with high-frequency ultrasonic assistance, the stability of the bubbles is further improved.

[0177] 3. The present invention introduces a water quality optimization module based on simulation and machine learning, which monitors the effluent quality in real time through sensors and automatically adjusts the ozone dosage, catalyst status and reactor operating conditions in combination with deep learning algorithms. The module can dynamically adjust the treatment process according to changes in water quality to ensure that the treatment effect is always maintained at the best state.

[0178] 4. The present invention organically links various processing modules through the closed-loop control module of steel wastewater treatment and reuse, realizes adaptive adjustment and optimization among various modules, and can dynamically adjust the operating parameters of each module according to real-time monitoring data, such as ozone dosage, flow rate, etc., to ensure the optimization of overall operating efficiency and reduce unnecessary energy waste.

[0179] 5. The present invention ensures high quality of effluent through secondary treatment and reuse modules, and combines with the multi-stage reuse module of recycled water to automatically distribute recycled water to different industrial uses according to the water quality level, thus realizing the reuse of water resources to the maximum extent. At the same time, the combined use of ultrafiltration membrane and nanofiltration membrane ensures the long-term stability of water quality and meets high-standard reuse requirements.

[0180] It should be noted that, for the aforementioned method embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should be aware that the present disclosure is not limited by the order of the actions described, because according to the present disclosure, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily required by the present disclosure.

[0181] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution disclosed in the present invention can be achieved, and the present invention is not limited here.

[0182] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A steel wastewater recycling device, characterized in that: The device comprises: Pretreatment module, used for pretreatment of steel wastewater to remove particulate matter and suspended matter in the steel wastewater; A microporous structured heterogeneous multi-phase catalyst module is used to oxidize organic matter in pretreated steel wastewater through a multi-phase catalyst to remove organic matter in the steel wastewater; The micro-nano bubble ozone deep oxidation reactor module is used to deeply oxidize the organic matter remaining in the steel wastewater after oxidation using micro-nano bubbles and ozone, thereby further removing the remaining organic matter in the steel wastewater; Advanced oxidation and chemical reduction synergistic treatment module, used to strongly oxidize the refractory substances in the steel wastewater after deep oxidation, and to reduce the toxic heavy metals in the steel wastewater after deep oxidation; The secondary treatment and reuse module is used to remove the residues in the steel wastewater after strong oxidation and reduction through physical filtration and secondary chemical oxidation, and treat the current steel wastewater to the reuse standard through the membrane system; The recycled water multi-stage reuse module is used to perform multi-stage filtration and storage and distribution of water that meets the reuse standards through a multi-stage filtration and automated distribution system; The water quality optimization module is used to monitor water quality in real time, provide feedback, and dynamically adjust ozone dosage and catalyst status. Through real-time monitoring and feedback control, the operating parameters of each module that treats steel wastewater can be dynamically adjusted; The closed-loop control module for steel wastewater treatment and reuse is used to monitor, feedback and adjust the operating status of each module that treats steel wastewater; Carbon emission monitoring and optimization module, used to monitor and optimize carbon emissions during steel wastewater treatment; The microporous framework type heterogeneous multi-phase catalyst module comprises: a catalyst carrier unit, an electrochemical auxiliary catalytic unit, and a catalyst self-cleaning unit; The catalyst carrier unit is a high-porosity carbon-based structure manufactured by 3D printing technology. When in use, metal particles are uniformly attached to the carbon substrate by chemical vapor deposition to form a multi-catalytic system with a high potential difference. The embedded electrodes of the electrochemical auxiliary catalytic unit are made of stainless steel or titanium alloy, and a local electric field is generated by pulse current to cause oxidation-reduction reactions of ions in water; The catalyst self-cleaning unit is controlled by an embedded pipe network and automatic valves. When the catalyst surface is covered with dirt, backwashing is performed to spray high-pressure water in reverse through the catalyst layer to remove deposits. The cleaning cycle is controlled by a surface contamination detection sensor.

2. The device according to claim 1, characterized in that The pretreatment module includes: a dynamic screening unit, a flocculation sedimentation unit, and a grid cleaning unit; The dynamic screening unit adjusts the size of the sieve holes in real time according to the size and quantity of particles in the water flow through an electric adjustment system and a sieve; the electric adjustment system is triggered by an inductive flow and pressure sensor; the material of the sieve is a metal alloy; The flocculation and sedimentation unit automatically adds flocculants through a precision pump, uses the flocculants to form floccules with suspended matter in the steel wastewater, and further promotes the mutual attraction of the suspended matter and the formation of floccules through directional vibration of ultrasonic equipment. After the flocculation reaction, the floccules settle in the sedimentation tank and are automatically removed by a screw conveyor; The grid cleaning unit uses a high-speed water jet to rinse the grid and automatically removes attached dirt through a rotating brush. During the cleaning process, a pressure sensor monitors the degree of grid clogging and triggers a cleaning operation once it is detected that the degree of clogging reaches a blocking condition.

3. The device according to claim 1, characterized in that The micro-nano bubble ozone deep oxidation reactor module comprises: a gas-liquid mixing enhancement unit, a micro-nano bubble generation unit, and a high-frequency ultrasonic bubble stabilization unit; The gas-liquid mixing enhancement unit mixes water and ozone gas in the reactor through a rotating gas-liquid mixer; the rotation speed of the gas-liquid mixer is controlled by the gas-liquid mixing enhancement unit through a variable frequency drive; The ceramic membrane of the micro-nano bubble generating unit generates nano-scale micropores through laser drilling technology, and ozone generates micro-nano bubbles through the micropores. The size and distribution of the bubbles are controlled by adjusting the pore size and air pressure of the ceramic membrane; The high-frequency ultrasonic bubble stabilization unit generates ultrasonic waves using a high-frequency ultrasonic vibration system, so that the bubbles remain in the water for a longer time, and forms micro-turbulence between the bubbles and pollutants using the ultrasonic waves.

4. The device according to claim 1, characterized in that The advanced oxidation and chemical reduction coordinated processing module includes: a UV photocatalytic unit and an electrochemical reduction unit; The UV photocatalytic unit uses ultraviolet light with a wavelength of 254nm or 185nm to irradiate the water body, reacting with ozone to produce a strong oxidant to further oxidize organic matter; The electrochemical reduction unit installs insoluble electrodes and applies a constant current to reduce heavy metal ions in steel wastewater into metal elements, which are deposited on the electrode surface. The metal deposits are then automatically cleaned by a scraper, and the voltage and current are automatically adjusted.

5. The device according to claim 1, characterized in that The secondary treatment and reuse module includes: a two-stage ozone oxidation unit, an ultrafiltration membrane unit, and a nanofiltration membrane unit; The two-stage ozone oxidation unit uses ozone generated by an ozone generator to treat steel wastewater with low concentration ozone in the first stage to remove organic matter; in the second stage, it uses high concentration ozone to treat residual pollutants, and adjusts the ozone dosage in each stage by automatically adjusting the output voltage and flow rate of the ozone generator; The ultrafiltration membrane unit adopts a hollow fiber ultrafiltration membrane, the material used is modified polyethylene, and is equipped with an automatic backwashing system, which uses osmotic pressure difference and hydraulic backwashing for cleaning; The nanofiltration membrane of the nanofiltration membrane unit is made of polyamide composite membrane material, the pore size of the nanofiltration membrane is between 1-5 nanometers, the surface of the membrane is treated with hydrophilicity, and the pressure and flow are adjusted through a real-time monitoring system.

6. The device according to claim 1, characterized in that The reclaimed water multi-stage reuse module includes: a multi-stage filtration unit, a reuse water quality classification unit, and an automatic membrane cleaning unit; The multi-stage filtration unit integrates ultrafiltration, nanofiltration and reverse osmosis systems. Each stage of the membrane filtration system controls different pressures and flows through PLC. The first stage of ultrafiltration removes suspended particles, the second stage of nanofiltration removes salts and organic matter, and the last stage of reverse osmosis makes the effluent meet the reuse standard. Each stage is monitored in real time by pressure sensors and flow meters. The recycled water quality classification unit stores the filtered recycled water in grades according to the water quality requirements, and distributes the water that meets different water quality standards to various industrial uses through electric valves and automatic distribution systems; the water storage tank is equipped with an online water quality monitoring sensor to report the water quality status in real time and automatically update the water quality classification; The automatic membrane cleaning unit starts an automatic cleaning procedure when membrane pollution or blockage is detected. The membrane cleaning process includes hydraulic backwashing, chemical cleaning and gas flushing. The chemical cleaning uses a weak acid or weak base solution.

7. The device according to claim 1, characterized in that The water quality optimization module includes: a sensor monitoring unit, a machine learning optimization unit, and an emergency processing unit; The sensor monitoring unit is arranged with various types of sensors, including spectral sensors, conductivity sensors, temperature sensors, and flow rate sensors; The machine learning optimization unit analyzes historical data and real-time sensor data through a machine learning algorithm, automatically adjusts the ozone dosage and catalyst update frequency in the reactor, and performs adaptive learning on water quality parameters; The emergency treatment unit combines historical data with real-time data to predict future water quality fluctuations, and adjusts the operating conditions of each module treating steel wastewater in advance based on the prediction results. When an emergency is detected, the oxidant addition is increased or the bypass treatment process is started.

8. The device according to claim 1, characterized in that The closed-loop control module for steel wastewater treatment and reuse includes: an adaptive control unit, an energy consumption optimization unit, and a feedback optimization unit; The adaptive control unit collects sensor data from each module treating steel wastewater through a central processor, including flow rate, pressure, temperature, ozone concentration, and catalyst status; and dynamically adjusts various parameters through a PID algorithm so that each module treating steel wastewater operates in an optimal state; and also performs trend prediction based on historical data to adjust the operation mode of the steel wastewater reuse device in advance; The energy consumption optimization unit combines sensor data to calculate the energy consumption of each module for treating steel wastewater in real time, including the power consumption of the ozone generator, the mechanical energy consumption of the pump and the mixer, and automatically adjusts the power output of the equipment through calculations using an energy consumption optimization algorithm; The feedback optimization unit uses a closed-loop feedback system to automatically detect the treatment effect during the treatment process and adjust the operating parameters through real-time feedback data; The carbon emission monitoring and optimization module includes: a carbon emission monitoring unit, a renewable energy integration unit, and a carbon emission optimization unit; The carbon emission monitoring unit monitors the carbon emission level in the steel wastewater treatment process in real time through the installed carbon dioxide and greenhouse gas sensors; The renewable energy integration unit integrates solar photovoltaic panels and energy storage battery systems, and provides power to the equipment through inverters and power management systems. The solar panels automatically adjust their angles according to light intensity, and the energy storage battery system provides power support at night or when light is insufficient. The carbon emission optimization unit adjusts the operation mode of the steel wastewater reuse device through an automated algorithm based on the carbon emission monitoring data.

9. A method for recycling steel wastewater, characterized in that: The method is applied to the steel wastewater reuse device according to any one of claims 1 to 8, comprising: Pretreatment step: The pretreatment module pre-treats the steel wastewater to remove particulate matter and suspended matter in the steel wastewater; Catalytic oxidation treatment step: the microporous structure heterogeneous multi-phase catalyst module oxidizes the organic matter in the pretreated steel wastewater through the multi-phase catalyst to remove the organic matter in the steel wastewater; Ozone deep oxidation step: The micro-nano bubble ozone deep oxidation reactor module uses micro-nano bubbles and ozone to deeply oxidize the remaining organic matter in the steel wastewater after oxidation, further removing the remaining organic matter in the steel wastewater; Advanced oxidation and chemical reduction synergistic treatment steps: The advanced oxidation and chemical reduction synergistic treatment module strongly oxidizes the refractory substances in the steel wastewater after deep oxidation, and reduces the toxic heavy metals in the steel wastewater after deep oxidation; Secondary treatment and reuse step: The secondary treatment and reuse module removes the residues in the steel wastewater after strong oxidation and reduction through physical filtration and secondary chemical oxidation, and treats the current steel wastewater to the reuse standard through the membrane system; Multi-stage reuse steps of recycled water: The multi-stage reuse module of recycled water performs multi-stage filtration and storage and distribution of water that meets the reuse standards through a multi-stage filtration and automated distribution system; Monitoring and adaptive adjustment steps: The water quality optimization module monitors the water quality in real time, feedbacks information, and dynamically adjusts the ozone dosage and catalyst status. Through real-time monitoring and feedback control, the operating parameters of each module that treats steel wastewater are dynamically adjusted; Closed-loop control steps: The closed-loop control module for steel wastewater treatment and reuse monitors, provides feedback and adjusts the operating status of each module that treats steel wastewater; Carbon emission monitoring and optimization step: The carbon emission monitoring and optimization module monitors and optimizes the carbon emissions during the steel wastewater treatment process.

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