A method for uniform electro-oxidative regeneration of activated carbon for decomposition of formaldehyde and odors

Abstract

The application discloses a uniform electric oxidation regeneration method for formaldehyde and peculiar smell, and belongs to the technical field of air purification. The method of the application realizes efficient decomposition of formaldehyde and peculiar smell and in-situ regeneration of activated carbon with extremely low energy consumption through uniform electric oxidation regeneration, intelligent closed-loop control and vertical air duct design and other technical means, perfectly adapts to the intermittent and fluctuating characteristics of the intermittent release of pollutants in harsh environments such as high temperature and high humidity, and solves the problems in the prior art, such as secondary pollution caused by saturated activated carbon adsorption, high energy consumption and safety hazards of thermal desorption regeneration, slow photocatalytic oxidation reaction rate and limitation by light penetration depth, and incomplete regeneration caused by uneven electric field distribution of the electric regeneration device, lack of real-time and accurate monitoring of the adsorption state of the filter material, and regeneration lag or excessive operation.

Description

Technical Field

[0001] This application belongs to the field of air purification technology, and in particular relates to a uniform electro-oxidation method for regenerating activated carbon for the decomposition of formaldehyde and odors. Background Technology

[0002] Currently, most mainstream air purification devices on the market use physical adsorption or chemical decomposition technologies to remove the aforementioned pollutants. Among them, activated carbon adsorption is widely used due to its low cost and mature technology. However, traditional activated carbon filters have a significant "adsorption saturation" bottleneck: once the micropores are filled with pollutants, not only does the purification efficiency drop sharply, but the adsorbed pollutants are also prone to desorption when the ambient temperature rises or humidity changes, causing serious secondary pollution. To solve this problem, existing technologies such as thermal desorption regeneration or photocatalytic oxidation have emerged. However, thermal desorption is energy-intensive and prone to safety hazards, while photocatalysis is limited by light intensity and penetration depth, resulting in a slow reaction rate and difficulty in dealing with high-concentration continuous pollution release. At the same time, existing electro-regeneration devices often suffer from uneven electric field distribution, leading to local overheating of the catalytic material or incomplete regeneration. Furthermore, the lack of real-time and accurate monitoring of the filter material's adsorption state results in either a delayed regeneration process that affects the purification effect or excessive operation that wastes energy.

[0003] In view of the above, this application is hereby submitted. Summary of the Invention

[0004] The purpose of this application is to address the problems of uneven electric field distribution in existing electro-regeneration devices, which leads to local overheating or incomplete regeneration of the catalytic material; and the lack of real-time and accurate monitoring of the adsorption state of the filter material, which results in either a delayed regeneration process affecting the purification effect or excessive operation causing energy waste. Therefore, this application proposes a uniform electro-oxidation regeneration method for formaldehyde and odor decomposition.

[0005] To achieve the above objectives, this application adopts the following technical solution: A method for uniform electro-oxidation regeneration of activated carbon for the decomposition of formaldehyde and odors, characterized in that it comprises: Obtain formaldehyde concentration data in the air; If the formaldehyde concentration data in the air is greater than or equal to the start threshold, a first start command is sent to the centrifugal fan to make the air to be filtered entering the centrifugal fan come into contact with the preset particulate filter to generate the first filtered air. The air filtered for the first time is drawn vertically into the reaction chamber containing the catalytic carbon bricks through the negative pressure generated by the centrifugal fan, following the internal guide air duct designed by the equipment. Obtain data on the formaldehyde adsorption concentration in the catalytic carbon brick; Determine whether the formaldehyde concentration data adsorbed in the catalytic carbon brick is greater than or equal to the start-up threshold. If so, send a second start-up command to the preset electro-oxidation component. The electro-oxidation component will generate electro-decomposition and electro-oxidation effects, oxidizing and degrading the molecules adsorbed in the catalytic carbon brick into harmless small molecules, thereby obtaining treated air; To obtain the formaldehyde residue adhering to the catalytic carbon brick; Determine whether the formaldehyde residue attached to the catalytic carbon brick is less than the start-up threshold. If so, send a first stop command to the electro-oxidation component. The treated air is discharged through a preset air outlet.

[0006] As a further description of the above technical solution: The process involves bringing the air entering the centrifugal fan into contact with the particulate filter to generate air that has undergone a first filtration. This includes: acquiring the air to be treated, removing particulate matter, colloids, oil droplets, etc., to prevent them from causing physical blockage to the activated carbon material; Determine whether the filtered air to be treated is suitable for entering the second-layer decomposition. If so, proceed with the step of sending the air after the first filtration into the reaction chamber where the catalytic carbon brick is located.

[0007] As a further description of the above technical solution: The air filtered in the first stage is drawn in vertically into the reaction chamber containing the catalytic carbon bricks through the negative pressure generated by the centrifugal fan, following the internal guide duct of the equipment. Obtain formaldehyde concentration data in the air; Determine if the formaldehyde concentration in the air is greater than or equal to the first start-up threshold. If it is less than the first start-up threshold, operate at low speed to save energy. If the value is greater than or equal to the first start-up threshold, the system will start at full speed, quickly establish negative pressure, and introduce the air to be filtered.

[0008] As a further description of the above technical solution: The acquisition of formaldehyde concentration data in the catalytic carbon brick includes: The van der Waals forces of the activated carbon within the catalytic carbon brick are used to adsorb formaldehyde and odor molecules, including but not limited to hydrogen sulfide, ammonia, and smoke.

[0009] As a further description of the above technical solution: Determine whether the formaldehyde concentration data adsorbed in the catalytic carbon brick is greater than or equal to the start-up threshold. If so, send a second start-up command to the preset electro-oxidation component, including: Obtain the adsorption force data of the catalytic carbon brick; Determine whether the adsorption force data in the catalytic carbon brick meets the requirements for daily adsorption. If not, initiate a third instruction to energize the electro-oxidation component and generate a uniform high-voltage DC electric field for regeneration.

[0010] As a further description of the above technical solution: The process of oxidizing and degrading the molecules adsorbed within the catalytic carbon brick into harmless small molecules to obtain treated air includes: Acquire processed air data; Determine the composition of the processed air data.

[0011] As a further description of the above technical solution: Vertically entering the pre-designed reaction chamber containing the catalytic carbon brick, including: The structure of the catalytic carbon brick is as follows: activated carbon and manganese-based catalysts are added, and then pressed and sintered at low temperature. As a further description of the above technical solution: The electro-oxidation component will produce electro-decomposition and electro-oxidation effects, including: Under the action of a high-voltage DC electric field, hydroxyl radicals and superoxide anions are generated on the surface of the catalytic carbon brick, which decompose the adsorbed organic pollutants into carbon dioxide and water by utilizing strong oxidizing properties.

[0012] As a further description of the above technical solution: The composition of the processed air data includes: Determine whether the concentrations of formaldehyde and total volatile organic compounds in the treated air meet the preset safety standards; if not, execute the second start command repeatedly. An electro-oxidation regeneration process is carried out.

[0013] Compared with the prior art, this application has the following main advantages: This application constructs a highly efficient and synergistic air purification system through uniform electro-oxidation regeneration technology, intelligent closed-loop control, and vertical air duct design. It demonstrates significant advantages, particularly in addressing the continuous release of pollutants such as formaldehyde under high temperature and humidity conditions. Its core innovation and beneficial effects are reflected in: by using a high-voltage DC electric field to excite highly active hydroxyl radicals and superoxide anions on the surface of the catalytic carbon brick, pollutants such as formaldehyde and TVOC adsorbed within the micropores of the activated carbon are directly oxidized and decomposed into carbon dioxide and water vapor, rather than simply desorbed. This electro-oxidation regeneration mechanism not only clears the adsorption sites but also allows the activated carbon to "remain in situ." "Regeneration" achieves complete mineralization and harmless treatment of pollutants, completely eliminating the risk of secondary pollution and extending the filter material's lifespan compared to traditional physical adsorption, significantly reducing replacement frequency and maintenance costs, especially suitable for scenarios where formaldehyde release increases dramatically in summer; simultaneously, the composite manganese catalyst and electric field form a synergistic effect, accelerating electron transfer and reducing decomposition activation energy, enabling formaldehyde to be efficiently decomposed at room temperature, reducing energy consumption compared to traditional thermal regeneration technology, and the catalyst's stability ensures long-term efficient operation of the electro-oxidation reaction, avoiding performance degradation; in terms of intelligent closed-loop control, the system monitors in real time. The system employs a triple-logic judgment based on pollutant concentration, carbon brick adsorption capacity, and residual amount. Electro-oxidation regeneration is automatically initiated only when the carbon brick is near saturation or pollutant levels exceed the limit. When the residual amount is below the threshold, it operates at low speed to avoid ineffective energy consumption. This strategy reduces equipment energy consumption compared to continuous operation. Furthermore, by dynamically adjusting the electric field strength to adapt to different pollution loads, a balance between economy and purification efficiency is ensured. In terms of vertical airflow design, the vertical guide duct works in conjunction with the centrifugal fan to guide airflow uniformly and vertically through the entire cross-section of the catalytic carbon brick, eliminating the airflow short-circuiting and reaction dead zone problems of traditional side-intake airflow. This, combined with optimized... The unique duct structure reduces wind resistance and increases airflow, ensuring consistent regeneration performance across the entire carbon brick and enhancing long-term system reliability. Addressing the accelerated formaldehyde release characteristic of high temperatures and humidity in summer, this application utilizes the humidity-insensitive advantage of electro-oxidation technology, combined with intelligent control to respond to high pollution loads in real time, avoiding the efficiency degradation of traditional adsorption materials due to humidity interference. Furthermore, the electro-oxidation process is conducted at ambient temperature and pressure, eliminating the need for high temperatures or strong oxidants, thus avoiding the risk of fire or chemical leaks. Simultaneously, the long-life filter material and energy-saving control significantly reduce the total lifespan cost, combining safety and economy.

[0014] In summary, this application integrates technologies such as uniform electro-oxidation regeneration, catalysis, electric field synergy, intelligent closed-loop control, and vertical air duct design. It utilizes a high-voltage electric field to excite highly active hydroxyl radicals and superoxide anions on the surface of the catalytic carbon brick, directly mineralizing adsorbed formaldehyde, TVOCs, etc., into carbon dioxide and water, achieving in-situ regeneration of activated carbon and complete harmlessness of pollutants. Combined with an intelligent control logic of "start on demand, stop when standards are met" and a uniform airflow duct, it solves industry problems such as easy saturation of traditional physical adsorption, secondary pollution, short filter material lifespan, and a sharp drop in purification efficiency under high temperature and humidity conditions. It achieves extended filter material lifespan, reduced energy consumption, and maintains good or better formaldehyde purification efficiency even under extreme environments. This truly realizes a paradigm shift in air purification from "passive adsorption" to "active decomposition-regeneration," providing a highly efficient, energy-saving, and long-lasting solution for indoor air quality management in harsh environments. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the system architecture of a uniform electro-oxidation regeneration method for formaldehyde and odor decomposition proposed in this application. Figure 2 This is a schematic diagram of the system monitoring structure for a uniform electro-oxidation regeneration method for decomposing formaldehyde and odors proposed in this application. Figure 3 This is a schematic diagram of the system flow structure of a uniform electro-oxidation regeneration method for decomposing formaldehyde and odors proposed in this application. Detailed Implementation

[0016] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0017] Please see the appendix Figure 1 -Appendix Figure 3 This application provides a technical solution: a method for uniform electro-oxidation regeneration of activated carbon for the decomposition of formaldehyde and odors, comprising: Obtain formaldehyde concentration data in the air; If the formaldehyde concentration data in the air is greater than or equal to the start threshold, a first start command is sent to the centrifugal fan to make the air to be filtered entering the centrifugal fan come into contact with the preset particulate filter to generate the first filtered air. The air after the first filtration is sucked by the negative pressure generated by the centrifugal fan, and vertically enters the reaction cavity where the preset catalytic carbon brick is located along the diversion air duct designed inside the equipment; Obtain the adsorption concentration data of formaldehyde in the catalytic carbon brick; Determine whether the adsorption concentration data of formaldehyde in the catalytic carbon brick is greater than or equal to the start threshold, and if yes, send a second start instruction to the preset electro-oxidation assembly; The electro-oxidation assembly generates electrolysis and electro-oxidation effects, oxidatively degrading the adsorbed molecules in the catalytic carbon brick into harmless small molecules to obtain treated air; Obtain the residual formaldehyde attached in the catalytic carbon brick; Determine whether the residual formaldehyde attached in the catalytic carbon brick is less than the start threshold, and if yes, send a first stop instruction to the electro-oxidation assembly; The treated air is discharged through a preset air outlet.

[0018] In this embodiment, the method adopts a closed-loop control logic of "monitoring-judging-executing-feedback", and specifically includes the following steps: S1: Ambient air quality detection and fan start-stop control; Data acquisition: A formaldehyde concentration sensor arranged at the air inlet is used to obtain real-time formaldehyde concentration data in the air to be treated; (denoted as Cair); Threshold judgment (first start threshold): The system is preset with a first start threshold, (denoted as Tfan), which is used to represent the warning line of ambient air pollution degree; The controller determines whether Cair is greater than or equal to Tfan.

[0019] Instruction execution: If Cair≥TfanCair≥Tfan, the controller sends a first start instruction to the centrifugal fan. After receiving the instruction, the centrifugal fan starts at full speed, quickly establishes negative pressure, and guides the air flow into the housing; If Cair<TfanCair<Tfan, the controller controls the centrifugal fan to operate at a low speed or remain in a standby state, so as to achieve energy saving and noise reduction; Pre-filtration process: Driven by the centrifugal fan, the air flow first contacts the preset particulate filter to remove dust, colloidal substances and oil droplets in the air, generating air after the first filtration.

[0020] S2: Air flow guidance and pollutant adsorption: Vertical air intake: The air after the first filtration is sucked by the negative pressure generated by the centrifugal fan, and vertically enters the reaction cavity where the preset catalytic carbon brick is located along the diversion air duct designed inside the equipment.

[0021] Adsorption: the catalytic carbon brick is made from activated carbon and manganese-based catalyst through pressing with addition of binder and low-temperature sintering. By virtue of the van der Waals force of activated carbon, residual formaldehyde and odor molecules (such as hydrogen sulfide, ammonia, smoke odor, etc.) in air are adsorbed into the micropores; Status monitoring: current adsorption formaldehyde concentration data (denoted as Cadsorb) in the catalytic carbon brick is acquired in real time, or the adsorption force data (denoted as Fadsorption) of the catalytic carbon brick is acquired directly.

[0022] S3: Electro-oxidation regeneration trigger control: Regeneration condition judgment (second start threshold): A second start threshold (denoted as Tregen) is preset in the system, which is used to characterize the "near-saturated" state of the catalytic carbon brick; The controller judges whether Cadsorb is greater than or equal to Tregen; or judges whether Fadsorption is less than the minimum value required to maintain daily adsorption operation (that is, insufficient adsorption force).

[0023] Instruction execution: If Cadsorb≥TregenCadsorb≥Tregen or Fadsorption is insufficient, the controller sends a second start instruction (or called a third start instruction, both of which refer to the regeneration trigger instruction) to the electro-oxidation assembly.

[0024] The electro-oxidation assembly is powered on to generate a uniform high-voltage direct current electric field.

[0025] S4: Uniform electro-oxidation decomposition process: Chemical reaction: under the action of the high-voltage direct current electric field, hydroxyl radicals and superoxide anions are generated on the surface of the catalytic carbon brick. By virtue of the strong oxidizing property, formaldehyde and organic pollutant molecules adsorbed in the micropores of the catalytic carbon brick are oxidized and degraded into harmless small molecules such as carbon dioxide and water vapor, so as to obtain treated air; Process monitoring: residual formaldehyde concentration data (denoted as Cresidue) attached in the catalytic carbon brick is acquired in real time.

[0026] S5: Regeneration termination and cycle control: Termination condition judgment (stop threshold): A stop threshold (denoted as Tstop) is preset in the system, which is used to characterize the standard of complete regeneration; The controller judges whether Cresidue is less than Tstop; Instruction execution: If Cresidue<TstopCresidue<Tstop, the controller sends a first stop instruction to the electro-oxidation assembly, cuts off the high-voltage electric field, and ends the regeneration process; If Cresidue≥Tstop, the controller will repeatedly execute the second start command to continuously perform electro-oxidation regeneration until the residual amount meets the standard. Final emission: The treated clean air is discharged back into the indoor environment through a pre-designed air outlet.

[0027] To further clarify the control logic of this application, the key thresholds and instructions involved in the document are defined as follows: Explanation of "startup threshold": First activation threshold (Tfan): This is a control parameter focused on environmental factors. It is the threshold for initiating physical purification (fan operation) and is typically set at the warning value of the national indoor air quality standard (e.g., 0.08 mg / m³). 3 A certain percentage) is used to respond to fluctuations in the concentration of environmental pollutants; The second threshold (Tregen) is a material-level control parameter. It is the threshold for initiating chemical regeneration (electro-oxidation) and is used to determine the occupancy rate of activated carbon adsorption sites. When the adsorption capacity reaches this threshold, it means that the physical adsorption capacity is about to be exhausted, and chemical decomposition must be used to release the adsorption sites. Stop threshold (Tstop): A control parameter focused on safety. It is the standard for ending the regeneration process, ensuring that contaminants are completely mineralized and preventing the residue of intermediate products due to incomplete regeneration.

[0028] Explanation of "startup command": First start command: Fan control command: characterized in that the speed and start / stop of the centrifugal fan are controlled according to the ambient air quality (Cair) to establish airflow circulation and to provide primary protection in conjunction with the particulate matter filter; Second Start-up Command: Adsorption Force Feedback Command: As a supplementary logic to the second start-up command, it is directly triggered based on the adsorption force data (Fadsorption) of the catalytic carbon brick. When a decrease in adsorption force is detected that cannot meet the daily working requirements, this command is sent directly, ensuring the accuracy of regeneration timing and avoiding the hysteresis error that may occur if relying solely on the concentration sensor.

[0029] The third start-up command: electric field excitation command: characterized in that it triggers the establishment of a high-voltage DC electric field based on the loading state (Cadsorb) of the catalytic carbon brick, thereby initiating the "uniform electro-oxidation" effect.

[0030] Through the above specific implementation methods, this application achieves intelligent closed-loop control of "starting on demand and stopping when standards are met", which not only ensures purification efficiency but also minimizes energy consumption.

[0031] The specific implementation method is as follows: the device used in the method includes a housing, a centrifugal fan, a particulate filter, a catalytic carbon brick, and an electro-oxidation assembly; The housing is provided with an air inlet and an air outlet; The centrifugal fan is installed inside the casing and is used to generate negative pressure suction. The catalytic carbon brick is disposed in the reaction chamber, and the air inlet surface of the reaction chamber is perpendicular to the suction direction of the centrifugal fan.

[0032] The electro-oxidation assembly includes multiple high-voltage electrode contacts, which are arranged in an equally spaced array on one side of the catalytic carbon brick, with each contact aligned in rows and columns and with consistent spacing.

[0033] The device is designed so that the air inlet surface of the reaction chamber of the catalytic carbon brick is perpendicular to the axis of the centrifugal fan, ensuring that the airflow enters the catalytic carbon brick vertically, evenly covers the entire surface of the carbon brick, avoids airflow short-circuiting, and improves adsorption efficiency. By guiding the airflow vertically through the air duct, the edge effect caused by traditional lateral air intake is eliminated, ensuring that all adsorption sites are effectively utilized; By designing the electro-oxidation components, the electro-oxidation regeneration rate of each region of the catalytic carbon brick is kept consistent, eliminating material aging caused by local overheating and regeneration residue caused by electric field blind spots, thus achieving a uniform "uniform electro-oxidation" regeneration effect across the entire cross section.

[0034] The specific implementation method is as follows: the air entering the centrifugal fan comes into contact with the particulate filter to generate air after the first filtration. This includes: acquiring the air to be treated, removing particulate matter, colloids, oil droplets, etc., to prevent them from causing physical blockage to the activated carbon material; Determine whether the filtered air to be treated is suitable for entering the second-layer decomposition. If so, proceed with the step of sending the air after the first filtration into the reaction chamber where the catalytic carbon brick is located.

[0035] The particulate filter screen is set between the air inlet and the catalytic carbon brick. It is made of primary or medium-efficiency filter material and is used to intercept dust and large particulate impurities to prevent them from clogging the micropores of the catalytic carbon brick. The system monitors the pressure difference across the filter in real time. When the pressure difference exceeds the set value, it triggers a filter replacement or cleaning prompt to ensure the pre-filtration effect.

[0036] The specific implementation method is as follows: the air after the first filtration is drawn vertically into the reaction chamber where the catalytic carbon brick is located through the negative pressure suction generated by the centrifugal fan, along the guide air duct designed inside the equipment, including: Obtain formaldehyde concentration data in the air; Determine if the formaldehyde concentration in the air is greater than or equal to the first start-up threshold. If it is less than the first start-up threshold, operate at low speed to save energy. If the value is greater than or equal to the first start-up threshold, the system will start at full speed, quickly establish negative pressure, and introduce the air to be filtered.

[0037] When Cair < ​​TlowC (low speed threshold), control the centrifugal fan to run at low speed to reduce energy consumption; When Cair ≥ ThighC (high-speed threshold), control the centrifugal fan to run at full speed to quickly purify high-concentration polluted air; The threshold Tlow can be preset or dynamically adjusted according to the application scenario.

[0038] The specific implementation method is as follows: obtaining the formaldehyde concentration data in the catalytic carbon brick; The van der Waals forces of the activated carbon within the catalytic carbon brick are used to adsorb formaldehyde and odor molecules, including but not limited to hydrogen sulfide, ammonia, and smoke.

[0039] This section utilizes the van der Waals forces of activated carbon within the catalytic carbon brick to effectively adsorb not only the target pollutant formaldehyde, but also simultaneously adsorb various common odors and gaseous pollutants such as hydrogen sulfide, ammonia, and smoke, significantly broadening the purification range and giving it a broad-spectrum adsorption capacity. Simultaneously, by acquiring real-time data on the formaldehyde concentration adsorbed in the catalytic carbon brick, it provides precise triggering for the subsequent electro-oxidation regeneration step, ensuring that regeneration only begins when the carbon brick is close to saturation, avoiding ineffective operation. In summary, this method not only improves the equipment's comprehensive removal capacity for complex pollutants but also provides crucial status feedback for intelligent closed-loop control, enhancing the system's practicality, economy, and comprehensive purification capabilities.

[0040] The specific implementation method is as follows: determine whether the formaldehyde concentration data adsorbed in the catalytic carbon brick is greater than or equal to the start-up threshold; if so, send a second start-up command to the preset electro-oxidation component, including: Obtain the adsorption force data of the catalytic carbon brick; Determine whether the adsorption force data in the catalytic carbon brick meets the requirements for daily adsorption. If not, initiate a third instruction to energize the electro-oxidation component and generate a uniform high-voltage DC electric field for regeneration.

[0041] The adsorption force data of the catalytic carbon brick (denoted as FadsF) is monitored in real time. When FadsF < the preset threshold, a third command is sent directly to trigger uniform electro-oxidation regeneration. That is, after the electro-oxidation component is energized, a uniformly distributed high-voltage DC electric field is generated, forming a consistent regeneration reaction zone across the entire cross section of the catalytic carbon brick, thus avoiding incomplete regeneration or material overheating caused by excessively strong or weak local electric fields. Adsorption force monitoring can be achieved through differential pressure sensors, resistive sensors, or electrochemical sensors to ensure accurate regeneration timing and avoid lag in concentration monitoring.

[0042] The specific implementation method is as follows: the adsorbed molecules in the catalytic carbon brick are oxidized and degraded into harmless small molecules to obtain treated air, including; Acquire processed air data; Determine the composition of the processed air data.

[0043] A TVOC sensor is installed at the air outlet to detect the concentration of formaldehyde and total volatile organic compounds in the exhaust air in real time. If Cout > safety limit, execute the second startup instruction repeatedly until CoutC reaches the target. Safety limits are set in accordance with national standards (such as GB / T 18883) to ensure that emissions are harmless.

[0044] The specific implementation method is as follows: vertically entering the reaction chamber where the pre-set catalytic carbon brick is located, including: The structure of the catalytic carbon brick is as follows: activated carbon and manganese-based catalysts are added, and then pressed and sintered at low temperature. This section, by defining the specific structure of the catalytic carbon brick—a composite of activated carbon and manganese-based catalysts, with the addition of a binder, followed by pressing and low-temperature sintering—brings the following beneficial effects: First, activated carbon provides a high specific surface area and abundant microporous structure, utilizing van der Waals forces to efficiently adsorb molecules such as formaldehyde and odors; the manganese-based catalysts, in turn, form a synergistic effect with the high-voltage DC electric field generated by the subsequent electro-oxidation components, accelerating electron transfer and reducing the activation energy for the decomposition of organic pollutants, enabling formaldehyde to be efficiently oxidized into carbon dioxide and water at room temperature, significantly improving decomposition efficiency; second, through pressing and dry low-temperature sintering processes, the carbon brick forms a uniform pore structure and a certain mechanical strength, ensuring low-resistance airflow penetration while preventing pulverization or detachment, extending the service life of the filter material; furthermore, the stability of the manganese-based catalysts ensures that the catalytic activity does not decay during long-term use, thus maintaining the continuous high efficiency of the electro-oxidation regeneration process. In summary, this composite structure provides an ideal reaction carrier for the integrated "adsorption-catalysis-electrooxidation" process, and is a key material basis for achieving rapid adsorption, efficient decomposition and long-term regeneration of pollutants.

[0045] The specific implementation method is as follows: the electro-oxidation component will generate electro-decomposition and electro-oxidation effects, including; Under the action of a high-voltage DC electric field, hydroxyl radicals and superoxide anions are generated on the surface of the catalytic carbon brick, which decompose the adsorbed organic pollutants into carbon dioxide and water by utilizing strong oxidizing properties.

[0046] The electro-oxidation component described here, under the action of a high-voltage DC electric field, generates highly active and strong oxide species such as hydroxyl radicals and superoxide anions on the surface of the catalytic carbon brick. Utilizing their extremely strong oxidation capacity, they directly and completely mineralize organic pollutants such as formaldehyde and odors adsorbed within the micropores of activated carbon into carbon dioxide and water, rather than simply desorbing or converting them into intermediate products. This process achieves the following beneficial effects: complete decomposition of pollutants, eliminating the secondary pollution problem caused by temperature and humidity changes after traditional activated carbon adsorption saturation; efficient reaction at room temperature and pressure, without the need for high temperatures or external oxidants, avoiding excessive energy consumption and safety hazards; and the oxidation products are harmless small molecules that can be directly discharged with the airflow, ensuring the cleanliness and safety of the exhaust air. In summary, this technical approach provides a chemical degradation mechanism for in-situ regeneration of activated carbon, ensuring the thoroughness and environmental friendliness of the purification process.

[0047] The specific implementation method is as follows: the components of the air data after the judgment and processing include; Determine whether the concentrations of formaldehyde and total volatile organic compounds in the treated air meet the preset safety standards; if not, execute the second start command repeatedly. An electro-oxidation regeneration process is carried out.

[0048] This section monitors the concentrations of formaldehyde and total volatile organic compounds (TVOC) in the treated air in real time and compares them with preset safety standards. If the standards are not met, the system automatically executes an electro-oxidation regeneration command repeatedly until the concentration drops below the safety threshold. This closed-loop feedback control mechanism brings significant benefits: First, it ensures that the air discharged from the equipment always meets health and safety requirements, avoiding pollutant residue or accumulation due to incomplete decomposition in a single cycle, fundamentally eliminating purification blind spots; second, it achieves an adaptive regeneration strategy of "no stop if standards are not met," requiring no manual intervention or preset fixed duration, greatly improving the reliability and intelligence of the purification process; furthermore, cyclic regeneration is triggered only when necessary, avoiding excessive redundant operation, ensuring both safety and energy efficiency. In summary, this step provides the final quality control for the system and is a key technical link to ensure stable and compliant purification effects during long-term operation.

[0049] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0050] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0051] Specifically, such as Figure 1 As shown, according to Figure 1 The system architecture diagram shown illustrates the device used in the uniform electro-oxidation regeneration activated carbon method described in this patent. The device includes a housing, a centrifugal fan, a particulate filter, a catalytic carbon brick, an electro-oxidation component, and corresponding sensor sets and a controller. The housing's air inlet and outlet form a closed airflow path. Indoor air enters through the air inlet and first passes through the particulate filter to remove large particulate impurities such as dust, colloids, and oil droplets. Then, under the negative pressure suction generated by the centrifugal fan, it uniformly penetrates the catalytic carbon brick—which is a composite sintered activated carbon and manganese-based catalyst—using van der Waals forces to adsorb gaseous pollutants such as formaldehyde, hydrogen sulfide, ammonia, and smoke. Simultaneously, the sensor set acquires real-time data on the formaldehyde concentration on the air inlet side, the adsorption state of the carbon brick (adsorbed formaldehyde concentration or adsorption force), and the residual air concentration after treatment on the air outlet side, and sends the data to the controller. The controller makes judgments based on preset thresholds.

[0052] When the formaldehyde concentration on the air inlet side reaches the start-up threshold, a first start-up command is sent to the centrifugal fan, and the speed can be adjusted. When the carbon brick adsorption is close to saturation or the adsorption force is insufficient, a second start-up command is sent to the electro-oxidation component, which is energized to generate a high-voltage DC electric field. This field excites hydroxyl radicals and superoxide anions on the surface of the catalytic carbon brick, completely mineralizing the adsorbed organic pollutants into carbon dioxide and water. When the residual concentration on the air outlet side is lower than the stop threshold, a first stop command is sent. If the standard is still not met, the regeneration process is repeated. The entire system achieves uniform airflow penetration of the entire cross-section of the carbon brick through the vertical air duct design, avoiding airflow short-circuiting and regeneration dead zones in traditional side-inlet airflow. Combined with the intelligent closed-loop control of "monitoring-judgment-execution-re-monitoring", it achieves the synergistic effect of on-demand regeneration, energy saving and consumption reduction, and thorough purification.

[0053] Specifically, such as Figure 2 As shown, according to Figure 2The schematic diagram of the system monitoring structure shown in this patent illustrates that the uniform electro-oxidation regeneration method for activated carbon constructs a three-level sensor network, including formaldehyde concentration monitoring on the air inlet side, adsorption state monitoring of the catalytic carbon brick, and residual air concentration monitoring after treatment. The formaldehyde concentration sensor on the air inlet side acquires formaldehyde concentration data in real time and transmits it to the controller to determine whether the first start-up threshold has been reached, thereby deciding the start / stop and speed adjustment of the centrifugal fan. Adsorption concentration and adsorption force sensors arranged inside or on the surface of the catalytic carbon brick collect adsorbed formaldehyde concentration and adsorption force data in real time. The controller compares these data with the second start-up threshold or daily adsorption requirements. Once it is determined that the carbon brick is close to saturation or the adsorption force is insufficient, the electro-oxidation component is triggered for regeneration. The formaldehyde and total volatile organic compound concentration sensors on the air outlet side continuously monitor the residual air concentration after treatment. The controller compares this data with the stop threshold. If the residual concentration is below the threshold, a first stop command is sent; otherwise, the second start command is executed cyclically, forming a closed-loop feedback of "decomposition-verification-reprocessing".

[0054] Figure 2 The solid or dashed arrows clearly illustrate the signal flow of the three types of monitoring data from the sensor to the controller and then back to the actuator. This achieves parallel and serial coordination of three logics: "inlet air concentration determines the fan's energy-saving response, carbon brick adsorption state determines the regeneration timing, and outlet air residue ensures purification compliance." This provides crucial real-time data support for the intelligent closed-loop control of the entire system, ensuring that the equipment always operates in the optimal state of on-demand regeneration, energy saving, and efficient and thorough purification.

[0055] Specifically, such as Figure 3 As shown, according to Figure 3 The system flow diagram shown illustrates the complete process of the uniform electro-oxidation regeneration activated carbon method described in this patent: First, formaldehyde concentration data in the air is acquired, and it is determined whether the data is greater than or equal to the start-up threshold. If so, a first start-up command is sent to the centrifugal fan, causing the air to be filtered to come into contact with the particulate filter to generate air after the first filtration. Under the negative pressure suction effect generated by the centrifugal fan, the air after the first filtration enters vertically into the reaction chamber where the catalytic carbon brick is located along the guide air duct designed inside the equipment. Then, formaldehyde concentration data adsorbed in the catalytic carbon brick is acquired, and it is determined whether it is greater than or equal to the start-up threshold. If so, a second start-up command is sent to the electro-oxidation component. The electro-oxidation component generates electro-decomposition and electro-oxidation effects, oxidizing and degrading the adsorbed molecules in the catalytic carbon brick into harmless small molecules, obtaining treated air. Next, formaldehyde residue attached to the catalytic carbon brick is acquired, and it is determined whether the residue is less than the start-up threshold. If so, a first stop command is sent to the electro-oxidation component. Finally, the treated air is discharged through a preset air outlet.

[0056] Figure 3Using flowcharts and decision branches, the complete control logic of "air concentration detection → fan start-up on demand → pre-filtration → vertical adsorption → carbon brick adsorption monitoring → electro-oxidation regeneration → residual feedback closed loop → clean air output" is clearly demonstrated. It reflects the intelligent closed loop feature of "start-up on demand and stop-up when standards are met" and is the core process for realizing in-situ regeneration of activated carbon and complete mineralization of pollutants.

[0057] In summary, the method of this application achieves highly efficient decomposition of formaldehyde and odorous gases and in-situ regeneration of activated carbon with extremely low energy consumption through technologies such as uniform electro-oxidation regeneration, intelligent closed-loop control, and vertical air duct design. At the same time, it is perfectly adapted to the intermittent and fluctuating characteristics of continuous pollutant release under harsh environments such as high temperature and high humidity. It solves the problems of existing technologies, such as the easy generation of secondary pollution after activated carbon adsorption saturation, high energy consumption and safety hazards of thermal desorption regeneration, slow photocatalytic oxidation reaction rate and limitation by light penetration depth, uneven electric field distribution of electro-regeneration device leading to incomplete regeneration, and lack of real-time and accurate monitoring of filter material adsorption state causing regeneration lag or over-operation.

[0058] Obviously, the embodiments described above are only some embodiments of this application, not all embodiments. The accompanying drawings show preferred embodiments of this application, but do not limit the patent scope of this application. This application can be implemented in many different forms; rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure of this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this application's specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the scope of patent protection of this application.

Claims

1. A method for uniform electro-oxidation regeneration of activated carbon for the decomposition of formaldehyde and odors, characterized in that, include: Obtain formaldehyde concentration data in the air; If the formaldehyde concentration data in the air is greater than or equal to the start threshold, a first start command is sent to the centrifugal fan to make the air to be filtered entering the centrifugal fan come into contact with the preset particulate filter to generate the first filtered air. The air filtered for the first time is drawn vertically into the reaction chamber containing the catalytic carbon bricks through the negative pressure generated by the centrifugal fan, following the internal guide air duct designed by the equipment. Obtain data on the formaldehyde adsorption concentration in the catalytic carbon brick; Determine whether the formaldehyde concentration data adsorbed in the catalytic carbon brick is greater than or equal to the start-up threshold. If so, send a second start-up command to the preset electro-oxidation component. The electro-oxidation component will generate electro-decomposition and electro-oxidation effects, oxidizing and degrading the molecules adsorbed in the catalytic carbon brick into harmless small molecules, thereby obtaining treated air; To obtain the formaldehyde residue adhering to the catalytic carbon brick; Determine whether the formaldehyde residue attached to the catalytic carbon brick is less than the start-up threshold; if so, send a stop command to the electro-oxidation component. The treated air is discharged through a preset air outlet.

2. The method for uniform electro-oxidation regeneration of activated carbon for formaldehyde and odor decomposition according to claim 1, characterized in that, The process of bringing the air entering the centrifugal fan into contact with the particulate filter to generate air after the first filtration includes: The process involves acquiring the air to be treated and removing particulate matter, colloids, oil droplets, etc., to prevent them from causing physical blockage to the activated carbon material. Determine whether the filtered air to be treated is suitable for entering the second-layer decomposition. If so, proceed with the step of sending the air after the first filtration into the reaction chamber where the catalytic carbon brick is located.

3. The method for uniform electro-oxidation regeneration of activated carbon for formaldehyde and odor decomposition according to claim 1, characterized in that, The air filtered in the first stage is drawn in vertically into the reaction chamber containing the catalytic carbon bricks through the negative pressure generated by the centrifugal fan, following the internal guide duct of the equipment. Obtain formaldehyde concentration data in the air; Determine if the formaldehyde concentration in the air is greater than or equal to the first start-up threshold. If it is less than the first start-up threshold, operate at low speed to save energy. If the value is greater than or equal to the first start-up threshold, the system will start at full speed, quickly establish negative pressure, and introduce the air to be filtered.

4. The method for uniform electro-oxidation regeneration of activated carbon for formaldehyde and odor decomposition according to claim 1, characterized in that, The acquisition of formaldehyde adsorption concentration data in the catalytic carbon brick includes: The van der Waals forces of the activated carbon within the catalytic carbon brick are used to adsorb formaldehyde and odor molecules, including but not limited to hydrogen sulfide, ammonia, and smoke.

5. The method for uniform electro-oxidation regeneration of activated carbon for formaldehyde and odor decomposition according to claim 1, characterized in that, Determine whether the formaldehyde concentration data adsorbed in the catalytic carbon brick is greater than or equal to the start-up threshold. If so, send a second start-up command to the preset electro-oxidation component, including: Obtain the adsorption force data of the catalytic carbon brick; Determine whether the adsorption force data in the catalytic carbon brick meets the requirements for daily adsorption. If not, initiate a third instruction to energize the electro-oxidation component and generate a uniform high-voltage DC electric field for regeneration.

6. The method for uniform electro-oxidation regeneration of activated carbon for formaldehyde and odor decomposition according to claim 1, characterized in that, The process of oxidizing and degrading the molecules adsorbed within the catalytic carbon brick into harmless small molecules to obtain treated air includes: Acquire processed air data; Determine the composition of the processed air data.

7. The method for uniform electro-oxidation regeneration of activated carbon for formaldehyde and odor decomposition according to claim 1, characterized in that, Vertically entering the pre-designed reaction chamber containing the catalytic carbon brick, including: The structure of the catalytic carbon brick is as follows: activated carbon and manganese-based catalysts are added, and then pressed and sintered at low temperature.

8. The method for uniform electro-oxidation regeneration of activated carbon for formaldehyde and odor decomposition according to claim 1, characterized in that, The electro-oxidation component will produce electro-decomposition and electro-oxidation effects, including: Under the action of a high-voltage DC electric field, hydroxyl radicals and superoxide anions are generated on the surface of the catalytic carbon brick, which decompose the adsorbed organic pollutants into carbon dioxide and water by utilizing strong oxidizing properties.

9. A method for uniform electro-oxidation regeneration of activated carbon for formaldehyde and odor decomposition according to claim 6, characterized in that, The composition of the processed air data includes: Determine whether the concentrations of formaldehyde and total volatile organic compounds in the treated air meet the preset safety standards; if not, execute the second start command repeatedly. An electro-oxidation regeneration process is carried out.

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