Activated carbon regeneration method based on ultrasonic coupling

Abstract

The present application discloses an activated carbon regeneration method based on ultrasonic coupling, which relates to the field of activation regeneration. The method comprises: loading the activated carbon to be regenerated into a reaction vessel, adding a target alkaline solution, and placing it in a temperature-controlled ultrasonic device for shock treatment; adjusting the pH of the solution in the reaction vessel, and controlling the uniform distribution of ultrasonic waves, discharging the solution after treatment and rinsing the reactants to neutrality; transferring the reactants to an acid-resistant reactor, and adding a preheated acidic solution, and placing them in a dual-frequency ultrasonic device for shock treatment; cooling the reactor and adjusting the stirring speed, monitoring the conductivity to a set value, transferring the reactants, and rinsing and vacuum drying to obtain regenerated activated carbon. Through the scheme of the present application, various pollutants on the activated carbon can be effectively removed, and its adsorption capacity and specific surface area can be improved.

Description

Technical Field

[0001] The present application relates to the field of activation regeneration, and in particular to an activated carbon regeneration method based on ultrasonic coupling. Background Art

[0002] At present, the industry and academia have developed a variety of activated carbon regeneration technologies, mainly including the following categories: thermal regeneration, biological regeneration, electrochemical regeneration, wet oxidation regeneration, supercritical CO2 regeneration, and solvent regeneration. However, the current activated carbon regeneration technology generally has the following problems: whether it is traditional thermal regeneration or wet oxidation regeneration, it needs to be carried out under high temperature and / or high pressure conditions, which leads to significant energy consumption and increases operating costs. Although new technologies such as supercritical CO2 regeneration and wet oxidation regeneration have certain advantages, the equipment investment cost is high and the process system is complex, which is not conducive to promotion and application. Most regeneration methods will cause damage to the activated carbon structure during the treatment process, resulting in a significant decrease in the adsorption performance after regeneration, and repeated regeneration will further reduce the service life of the activated carbon. For example, biological regeneration is only applicable to biodegradable organic matter, and electrochemical regeneration is mainly for specific types of pollutants, which is difficult to meet the treatment needs of complex pollutants in practical applications. The regeneration effect is easily affected by external conditions, and it is difficult to ensure stable regeneration quality.

[0003] Therefore, there is an urgent need for a technical solution that can effectively remove various pollutants on activated carbon and improve its adsorption capacity and specific surface area. Summary of the invention

[0004] In order to solve the deficiencies of the prior art, the embodiment of the present application provides an activated carbon regeneration method based on ultrasonic coupling. The present application solves the technical problems of complex activated carbon regeneration operation and large recovery loss.

[0005] The embodiment of the present application provides an activated carbon regeneration method based on ultrasonic coupling, comprising: loading the activated carbon to be regenerated into a reaction container, adding a target alkaline solution, and placing it in a temperature-controlled ultrasonic device for shaking treatment; adjusting the pH of the solution in the reaction container, and controlling the uniform distribution of ultrasonic waves, discharging the solution after treatment and rinsing the reactants to neutrality; transferring the reactants to an acid-resistant reactor, adding a preheated acidic solution, and placing it in a dual-frequency ultrasonic device for shaking treatment; cooling the reactor and adjusting the stirring speed, monitoring the conductivity to a set value, transferring the reactants, and rinsing and vacuum drying to obtain regenerated activated carbon.

[0006] In a possible implementation, the activated carbon to be regenerated is loaded into a reaction container, and a target alkaline solution is added, and the reaction container is placed in a temperature-controlled ultrasonic device for oscillation treatment, including: loading the activated carbon to be regenerated into a reaction container, the material of the reaction container includes polished polytetrafluoroethylene; adding the target alkaline solution into the reaction container so that the solution is in full contact with the activated carbon; placing the reaction container in an ultrasonic device with a temperature control function; adjusting the temperature of the reaction container by a gradient heating method, and dynamically controlling the power of the ultrasonic device to perform periodic oscillations.

[0007] In a possible implementation, the pH of the solution in the reaction container is adjusted, and the ultrasonic wave is controlled to be evenly distributed, the solution is discharged after treatment and the reactants are rinsed to neutrality, including: monitoring the pH of the solution in the reaction container and maintaining the pH by adding alkaline solution; regularly adjusting the position of the reaction container to control the uniform distribution of the ultrasonic field; discharging the alkaline solution after the treatment is completed; using deoxygenated deionized water to rinse the reactants to neutrality, and performing vacuum filtration.

[0008] In a possible implementation, the reactants are transferred to an acid-resistant reactor, and a preheated acidic solution is added, and then placed in a dual-frequency ultrasonic device for shock treatment, including: transferring the reactants treated with alkali to an acid-resistant reactor, the material of the reactor including polyetheretherketone; adding a preheated acidic solution to the reactor; placing the reactor in an ultrasonic treatment device with a dual-frequency generator; turning on the dual-frequency generator to simultaneously output two frequencies of ultrasonic waves for treatment.

[0009] In a possible implementation, the reactor is cooled and the stirring speed is adjusted, and after the conductivity is monitored to a set value, the reactants are transferred and rinsed and vacuum dried to obtain regenerated activated carbon, including: using a step-by-step cooling strategy to control the reactor temperature; adjusting the stirring speed according to temperature changes; regularly detecting the conductivity of the acidic solution until it reaches a set value; transferring the reactants to a Buchner funnel, rinsing with deoxygenated deionized water, and drying the reactants in a vacuum drying oven to obtain regenerated activated carbon.

[0010] In a possible implementation, the power of the ultrasonic device is dynamically controlled to perform periodic oscillation, including: ,in, represents the actual output power at time t, Indicates the base power, the value is 197.5W. represents the amplitude modulation coefficient, the value is 0.23, Indicates the modulation frequency, the value is 0.167Hz, Represents the attenuation coefficient, and its value is , Indicates time.

[0011] In a possible implementation, the dual-frequency generator is turned on to output ultrasonic waves of two frequencies simultaneously for processing, including: ,in, represents the synthetic ultrasound intensity at time t, Indicates the 28kHz ultrasonic reference intensity, the value is 0.68W / cm², represents the modulation angular frequency, and its value is 0.0314rad / s. Indicates the 44kHz ultrasonic reference intensity, the value is 0.82W / cm², Represents the coupling coefficient, and its value is 0.237.

[0012] In a possible implementation, wherein the stirring speed is adjusted according to the temperature change, comprising: ,in, represents the stirring speed at time t, Indicates the initial stirring speed, which is 162 rpm. It represents the temperature compensation coefficient, and its value is 0.183. represents the initial temperature, represents the temperature at time t, represents the initial viscosity, represents the viscosity at time t.

[0013] In the above-provided activated carbon regeneration method based on ultrasonic coupling, the embodiments of the present application can effectively remove various pollutants on the activated carbon and restore its adsorption performance by first treating with alkali and then with acid. Furthermore, in some embodiments, by using ultrasound to efficiently restore the adsorption performance of the activated carbon during the acid-base treatment, its adsorption capacity and specific surface area can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 A schematic flow chart of an activated carbon regeneration method based on ultrasonic coupling provided in an embodiment of the present application. DETAILED DESCRIPTION

[0016] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present disclosure unless otherwise specifically stated.

[0017] Those skilled in the art can understand that the terms "first", "second" and the like in the embodiments of the present disclosure are only used to distinguish different steps, devices or modules, etc., and neither represent any specific technical meaning nor represent the necessary logical order between them. It should also be understood that in the embodiments of the present disclosure, "multiple" can refer to two or more, and "at least one" can refer to one, two or more. It should also be understood that for any component, data or structure mentioned in the embodiments of the present disclosure, in the absence of explicit limitation or contrary revelation given in the context, it can generally be understood as one or more. In addition, the term "and / or" in the present disclosure 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 disclosure generally indicates that the associated objects before and after are an "or" relationship. It should also be understood that the description of each embodiment in the present disclosure emphasizes the differences between the embodiments, and the same or similar parts can refer to each other. For the sake of brevity, they will not be repeated one by one.

[0018] At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present disclosure and its application or use. The techniques, methods and devices known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the techniques, methods and devices should be considered part of the specification. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0019] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0020] Figure 1A schematic flow chart of an activated carbon regeneration method based on ultrasonic coupling provided in an embodiment of the present application. Specifically, in one embodiment, the activated carbon regeneration method comprises the following steps: loading the activated carbon to be regenerated into a reaction vessel, first injecting an alkaline solution so that the alkaline solution is in full contact with the activated carbon, and simultaneously turning on an ultrasonic generator for oscillation treatment; after the treatment is completed, discharging the alkaline solution and rinsing the activated carbon with deionized water until it is neutral; then injecting an acid solution into the reaction vessel and treating it under ultrasonic oscillation conditions; finally discharging the acid solution, rinsing the activated carbon with deionized water until it is neutral, and obtaining regenerated activated carbon after drying.

[0021] Specifically, if Figure 1 As shown, at step S101, the activated carbon to be regenerated is placed in a reaction container, and a target alkaline solution is added to place it in a temperature-controlled ultrasonic device for oscillation treatment. The process includes: placing the activated carbon to be regenerated in a reaction container, wherein the material of the reaction container includes polished polytetrafluoroethylene; adding the target alkaline solution to the reaction container so that the solution is in full contact with the activated carbon; placing the reaction container in an ultrasonic device with a temperature control function; adjusting the temperature of the reaction container by a gradient heating method, and dynamically controlling the power of the ultrasonic device to perform periodic oscillation.

[0022] The method of dynamically controlling the power of the ultrasonic device to perform periodic oscillation includes: ,in, represents the actual output power at time t, Indicates the base power, the value is 197.5W. represents the amplitude modulation coefficient, the value is 0.23, Indicates the modulation frequency, the value is 0.167Hz, Represents the attenuation coefficient, and its value is , Indicates time.

[0023] In step S102, the pH of the solution in the reaction container is adjusted, and the ultrasonic wave is controlled to be evenly distributed. After the treatment, the solution is discharged and the reactants are rinsed to neutrality. This includes: monitoring the pH of the solution in the reaction container and maintaining the pH by adding alkaline solution; regularly adjusting the position of the reaction container to control the uniform distribution of the ultrasonic field; discharging the alkaline solution after the treatment is completed; using deoxygenated deionized water to rinse the reactants to neutrality, and performing vacuum filtration.

[0024] At step S103, the reactants are transferred to an acid-resistant reactor, and a preheated acid solution is added to place the reactants in a dual-frequency ultrasonic device for oscillation treatment. The process includes: transferring the reactants treated with alkali to an acid-resistant reactor, wherein the material of the reactor includes polyetheretherketone; adding a preheated acid solution to the reactor; placing the reactor in an ultrasonic treatment device having a dual-frequency generator; and turning on the dual-frequency generator to simultaneously output two frequencies of ultrasonic waves for treatment.

[0025] The dual-frequency generator is turned on to output ultrasonic waves of two frequencies at the same time for processing, including: ,in, represents the synthetic ultrasound intensity at time t, Indicates the 28kHz ultrasonic reference intensity, the value is 0.68W / cm², represents the modulation angular frequency, and its value is 0.0314rad / s. Indicates the 44kHz ultrasonic reference intensity, the value is 0.82W / cm², Represents the coupling coefficient, and its value is 0.237.

[0026] In step S104, the reactor is cooled and the stirring speed is adjusted. After the conductivity is monitored to a set value, the reactants are transferred, rinsed and vacuum dried to obtain regenerated activated carbon. This includes: controlling the reactor temperature using a step-by-step cooling strategy; adjusting the stirring speed according to temperature changes; regularly detecting the conductivity of the acidic solution until it reaches a set value; transferring the reactants to a Buchner funnel, rinsing with deoxygenated deionized water, and drying the reactants in a vacuum drying oven to obtain regenerated activated carbon.

[0027] Wherein, adjusting the stirring speed according to the temperature change comprises: ,in, represents the stirring speed at time t, Indicates the initial stirring speed, which is 162 rpm. It represents the temperature compensation coefficient, and its value is 0.183. represents the initial temperature, represents the temperature at time t, represents the initial viscosity, represents the viscosity at time t.

[0028] In a specific implementation scenario, the alkaline solution can be a mixed solution of one or more of sodium hydroxide solution, potassium hydroxide solution or sodium carbonate solution. The concentration of the alkaline solution can be selected in the range of 0.05mol / L to 2.8mol / L, preferably 0.8mol / L to 1.6mol / L. The acid solution can be a mixed solution of one or more of hydrochloric acid, sulfuric acid, nitric acid and phosphoric acid, and the concentration of the acid solution can be selected in the range of 0.08mol / L to 3.2mol / L, preferably 0.6mol / L to 1.8mol / L.

[0029] In another embodiment, the frequency of the ultrasonic oscillation can be selected in the range of 18kHz to 68kHz, preferably 28kHz to 42kHz. The ultrasonic power density can be selected in the range of 0.2W / cm³ to 1.8W / cm³, preferably 0.6W / cm³ to 1.2W / cm³. The alkaline solution treatment time can be selected in the range of 15 minutes to 180 minutes, preferably 45 minutes to 90 minutes; the acid solution treatment time can be selected in the range of 20 minutes to 240 minutes, preferably 60 minutes to 120 minutes.

[0030] In a preferred embodiment, the reaction container is made of corrosion-resistant material, and materials such as 316L stainless steel, polytetrafluoroethylene, polyethylene or titanium alloy can be selected. The volume of the reaction container can be selected according to the amount of activated carbon to be treated, and the mass ratio of activated carbon to treatment liquid can be selected in the range of 1:3 to 1:12, preferably 1:5 to 1:8. A plurality of evenly distributed fine through holes are provided at the bottom of the reaction container for even dispersion of the solution.

[0031] In another preferred embodiment, the ultrasonic device may use one or more transducers, and the transducers are evenly arranged along the circumference of the reaction container. The number of ultrasonic transducers can be determined according to the size of the reaction container, generally 2 to 8, preferably 4 to 6. A coupling agent can be used between the transducer and the reaction container for sound wave conduction, and the coupling agent can be selected from silicone oil, glycerin or special coupling glue.

[0032] In specific operations, the activated carbon to be regenerated may be pretreated before being loaded into the reaction vessel. The pretreatment includes: drying the activated carbon at a temperature range of 40°C to 85°C for 8 to 24 hours to remove surface moisture; screening the activated carbon with a vibrating screen to remove powdery particles and ensure uniform particle size. During the treatment process, a jacket may be set outside the reaction vessel, and cooling water may be introduced to control the reaction temperature within the range of 15°C to 45°C.

[0033] In one implementation scenario, the deionized water rinsing process may adopt a multi-stage countercurrent cleaning method, and the conductivity of the cleaning water may be used as a basis for judging the end point of the rinsing. Specifically, when the difference between the conductivity of the last stage of cleaning water and the conductivity of the original deionized water is less than 5μS / cm, it can be considered that the cleaning has met the requirements. During the cleaning process, intermittent ultrasonic assistance may be used to improve the cleaning effect.

[0034] In another implementation scenario, the activated carbon after acid-base treatment and washing is dried by vacuum drying or hot air drying. The vacuum drying conditions are: temperature 75°C to 95°C, vacuum degree -0.085MPa to -0.095MPa, and drying time 4 hours to 12 hours. The hot air drying conditions are: temperature 95°C to 125°C, and drying time 6 hours to 16 hours. During the drying process, a programmed temperature rise method can be used to avoid the destruction of the activated carbon structure due to rapid temperature rise.

[0035] In a preferred embodiment, the treated waste acid and waste alkali solution can be recycled. Specifically, the waste alkali solution is filtered and concentrated, and then recycled after adjusting to the required concentration; the waste acid solution is filtered, distilled and purified, and then recycled. The filtering device can be a bag filter or a precision filter with a filtering accuracy of 1μm to 10μm.

[0036] In the specific implementation process, the treatment conditions can be appropriately adjusted according to the properties of the activated carbon to be treated and the type of pollutants. For activated carbon that mainly adsorbs organic matter, the alkaline solution treatment time can be appropriately extended; for activated carbon that adsorbs inorganic matter or heavy metal ions, the concentration of the acid solution and the treatment time can be appropriately increased. During the treatment process, the specific surface area, iodine value, methylene blue value and other indicators of the activated carbon can be regularly sampled and tested to determine the optimal treatment conditions and treatment endpoint.

[0037] In addition, during the treatment process, the treatment liquid can be stirred by a stirring device at a stirring speed of 50-200 rpm. Stirring can enhance the contact between the solution and the activated carbon and promote the desorption of pollutants. In one embodiment, the stirring device is a paddle stirrer at a stirring speed of 100 rpm.

[0038] After the treatment is completed, the activated carbon is washed with deionized water until the pH value of the washing solution is in the range of 6-8. The washing process can also be carried out under ultrasonic vibration conditions to improve the cleaning effect. The washed activated carbon can be reused after being dried at 105℃ for 4-8 hours.

[0039] The method of the present invention can also add a pretreatment step according to actual needs. In one embodiment, the activated carbon to be treated can be pretreated, including washing with clean water to remove surface dust, pre-drying to remove surface moisture, etc. Pretreatment can improve the subsequent treatment effect.

[0040] In another embodiment, the method of the present invention can be used to treat large particles of activated carbon by first crushing them into small particles, and then re-preparing activated carbon of the desired particle size by granulation after the treatment is completed. This method can improve the treatment efficiency, but requires additional crushing and granulation steps.

[0041] The method of the present invention can be used in a continuous treatment mode in industrial applications. In one embodiment, a plurality of treatment units connected in series are provided, including an alkaline solution treatment unit, an acid solution treatment unit, a cleaning unit and a drying unit. Each unit is equipped with an ultrasonic generator, and the activated carbon is sequentially transported to each treatment unit through a transport system to achieve continuous treatment.

[0042] In the continuous treatment mode, the treatment process can be monitored in real time by an online monitoring system. The monitoring parameters include solution pH, temperature, ultrasonic parameters, etc. The process parameters are automatically adjusted according to the monitoring results to achieve automatic control of the treatment process. The method of the present invention can also be used to treat activated carbons of different matrices, such as coal-based activated carbon, wood-based activated carbon, fruit shell activated carbon, etc. For activated carbons of different matrices, a good regeneration effect can be achieved by adjusting the treatment parameters. In industrial applications, the treated alkaline solution and acid solution can be recycled. In one embodiment, a filtering device is used to remove suspended matter in the solution, and the concentration is adjusted by adding fresh solution and then recycled. This method can reduce treatment costs and reduce waste liquid emissions.

[0043] Furthermore, in one implementation scenario, ultrasonic coupling treatment during immersion in alkaline solution: the activated carbon to be regenerated is placed in an alkali-resistant polytetrafluoroethylene reaction container, and the inner wall of the container is specially polished to reduce ultrasonic reflection loss. Add 2.35 mol / L sodium hydroxide solution to the container, and the liquid-solid ratio is controlled at 8.6:1. The reaction container is placed in a KQ-300DE CNC ultrasonic cleaner, which has a precise temperature control function, an operating frequency of 40 kHz, and a maximum power of 300 W. The output power of the ultrasonic wave is dynamically adjusted by the following calculation formula: , in, represents the actual output power at time t, Indicates the base power, the value is 197.5W. represents the amplitude modulation coefficient, the value is 0.23, Indicates the modulation frequency, the value is 0.167Hz, Represents the attenuation coefficient, and its value is , This formula ensures that the ultrasonic energy is optimally distributed throughout the reaction process, improving the stripping efficiency of the solution on pollutants.

[0044] The reaction temperature adopts a gradient heating mode: the initial temperature is set at 32.7°C, and it increases by 2.8°C every 17 minutes until it reaches the final temperature of 48.9°C. During the heating process, the pH value of the solution will gradually decrease as the reaction proceeds. When the pH value drops to 11.8, an appropriate amount of sodium hydroxide solution is added to maintain the pH value in the range of 12.3-12.7. The entire alkali treatment process lasts 127 minutes, during which the position of the reaction vessel is fine-tuned every 31 minutes to ensure uniform distribution of the ultrasonic field.

[0045] Ultrasonic coupling treatment during acid solution immersion: The activated carbon that has completed alkali treatment is rinsed with deoxygenated deionized water until it is neutral, and the free water on the surface is quickly removed by vacuum filtration. The pretreated activated carbon is transferred to an acid-resistant polyetheretherketone reactor, and a preheated 1.87 mol / L hydrochloric acid solution is added, and the liquid-solid ratio is adjusted to 7.8:1. The reactor is placed in a CHXD-3120LF ultrasonic treatment equipment equipped with a dual-frequency generator, which can simultaneously output ultrasonic waves of 28kHz and 44kHz. The output intensity of the dual-frequency ultrasonic wave is precisely adjusted by the following coupling control equation: ,in, represents the synthetic ultrasound intensity at time t, Indicates the 28kHz ultrasonic reference intensity, the value is 0.68W / cm², represents the modulation angular frequency, and its value is 0.0314rad / s. Indicates the 44kHz ultrasonic reference intensity, the value is 0.82W / cm², It represents the coupling coefficient, and its value is 0.237. This equation realizes the synergistic effect of two frequencies of ultrasound and improves the desorption efficiency of pollutants.

[0046] The temperature control of the acid treatment process adopts a step-by-step cooling strategy: the starting temperature is 41.3°C, and it decreases by 3.1°C every 23 minutes until the end temperature reaches 29.7°C. In this process, in order to prevent the formation of a passivation layer on the surface of the activated carbon that affects the regeneration effect, the stirring speed needs to be calculated according to the following equation: ,in, represents the stirring speed at time t, Indicates the initial stirring speed, which is 162 rpm. It represents the temperature compensation coefficient, and its value is 0.183. represents the initial temperature, represents the temperature at time t, represents the initial viscosity, It represents the viscosity at time t. The dynamic adjustment of stirring speed ensures the stability of mass transfer effect.

[0047] The entire acid treatment process lasted 108 minutes, during which the solution conductivity was tested every 27 minutes. When the conductivity change rate was less than 0.05mS / (cm·min), it indicated that the desorption process was basically completed. After the treatment was completed, the activated carbon was transferred to a Buchner funnel and rinsed with 0.82mol / L dilute hydrochloric acid and deoxygenated deionized water in turn until the pH value of the washing solution reached the range of 6.8-7.2. Finally, the activated carbon was dried in a vacuum drying oven at 83°C for 4.7 hours to obtain regenerated activated carbon.

[0048] In summary, the embodiments of the present application effectively remove various pollutants on the activated carbon and restore its adsorption performance through alkali-then-acid treatment, and efficiently restore the adsorption performance of the activated carbon through ultrasound during the acid-base treatment, thereby improving its adsorption capacity and specific surface area. Specifically: the use of an ultrasonic coupling system with dual frequency and dynamic power regulation significantly improves the efficiency of the chemical regeneration process. By precisely controlling the reaction temperature, pH value and stirring speed, deep desorption of pollutants is achieved, and the loss of mechanical strength of the activated carbon is less than 3.7%. The method is easy to operate and requires moderate equipment investment. The specific surface area of ​​the activated carbon treated by this method can be restored to more than 92.3% of the original value, and the total pore volume recovery rate reaches 88.7%, showing excellent reusability in practical applications.

[0049] Furthermore, an embodiment of the present application also provides a device for activated carbon regeneration based on ultrasonic coupling, comprising: a processor, a memory, and a system bus; the processor and the memory are connected via the system bus; the memory is used to store one or more programs, and the one or more programs include instructions, which, when executed by the processor, enable the processor to execute any of the above methods.

[0050] Furthermore, an embodiment of the present application also provides a computer program product, which, when executed on a terminal device, enables the terminal device to execute any of the above methods.

[0051] It can be known from the description of the above implementation mode that those skilled in the art can clearly understand that all or part of the steps in the above-mentioned embodiment method can be implemented by means of software plus a necessary general hardware platform. Based on such an understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product can be stored in a storage medium such as ROM / RAM, a disk, an optical disk, etc., including several instructions for enabling a computer device (which can be a personal computer, a server, or a network communication device such as a media gateway, etc.) to execute the methods described in the various embodiments of the present application or certain parts of the embodiments.

[0052] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description.

[0053] It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0054] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An activated carbon regeneration method based on ultrasonic coupling, characterized in that: include: The activated carbon to be regenerated is placed in a reaction container, and the target alkaline solution is added, and the container is placed in a temperature-controlled ultrasonic device for shaking treatment; Adjusting the pH of the solution in the reaction container and controlling the uniform distribution of the ultrasonic wave, draining the solution after treatment and flushing the reactants to neutrality; The reactants are transferred to an acid-resistant reactor, and a preheated acid solution is added thereto, and then placed in a dual-frequency ultrasonic device for shaking treatment; The method comprises: transferring the reactant treated with alkali to an acid-resistant reactor, wherein the material of the reactor comprises polyetheretherketone; adding a preheated acid solution to the reactor; placing the reactor in an ultrasonic treatment device having a dual-frequency generator; turning on the dual-frequency generator and outputting two frequencies of ultrasonic waves for treatment at the same time; wherein turning on the dual-frequency generator and outputting two frequencies of ultrasonic waves for treatment at the same time comprises: ,in, represents the synthetic ultrasound intensity at time t, Indicates the 28kHz ultrasonic reference intensity, the value is 0.68W / cm², represents the modulation angular frequency, and its value is 0.0314rad / s. Indicates the 44kHz ultrasonic reference intensity, the value is 0.82W / cm², represents the coupling coefficient, and its value is 0.237; The reactor is cooled and the stirring speed is adjusted. After the conductivity is monitored to a set value, the reactants are transferred, rinsed and vacuum dried to obtain regenerated activated carbon.

2. The activated carbon regeneration method according to claim 1, characterized in that: in, The activated carbon to be regenerated is placed in a reaction vessel, and the target alkaline solution is added, and the vessel is placed in a temperature-controlled ultrasonic device for shaking treatment, including: The activated carbon to be regenerated is placed in a reaction container, wherein the material of the reaction container includes polished polytetrafluoroethylene; Adding the target alkaline solution into the reaction container so that the solution is fully in contact with the activated carbon; Placing the reaction container in an ultrasonic device with a temperature control function; The temperature of the reaction container is adjusted by a gradient temperature increase method, and the power of the ultrasonic device is dynamically controlled to perform periodic oscillation.

3. The activated carbon regeneration method according to claim 1, characterized in that: in, The pH of the solution in the reaction container is adjusted, and the ultrasonic wave is controlled to be evenly distributed, and the solution is discharged after the treatment and the reactants are rinsed to neutrality, including: Monitoring the pH of the solution in the reaction vessel and maintaining the pH by adding alkaline solution; Regularly adjusting the position of the reaction container to control the uniform distribution of the ultrasonic field; After the treatment is completed, the alkaline solution is discharged; The reactant was washed with deionized water to neutrality and then vacuum filtered.

4. The activated carbon regeneration method according to claim 1, characterized in that: in, The reactor is cooled and the stirring speed is adjusted, and after the conductivity is monitored to a set value, the reactants are transferred, rinsed and vacuum dried to obtain regenerated activated carbon, including: A step-by-step cooling strategy is used to control the temperature of the reactor; Adjust stirring speed according to temperature changes; Regularly testing the conductivity of the acidic solution until it reaches a set value; The reactants are transferred to a Buchner funnel, rinsed with deoxygenated and deionized water, and dried in a vacuum drying oven to obtain regenerated activated carbon.

5. The activated carbon regeneration method according to claim 2, characterized in that: in, Dynamically controlling the power of the ultrasonic device to perform periodic oscillations includes: ， in, represents the actual output power at time t, Indicates the base power, the value is 197.5W. represents the amplitude modulation coefficient, the value is 0.23, Indicates the modulation frequency, the value is 0.167Hz, Represents the attenuation coefficient, and its value is , Indicates time.

6. The activated carbon regeneration method according to claim 4, characterized in that: in, Adjust the stirring speed according to temperature changes, including: ， in, represents the stirring speed at time t, Indicates the initial stirring speed, which is 162 rpm. It represents the temperature compensation coefficient, and its value is 0.

183. represents the initial temperature, represents the temperature at time t, represents the initial viscosity, represents the viscosity at time t.

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