Activated carbon adsorption and desorption system and method

Abstract

The invention provides an activated carbon adsorption and desorption system and an activated carbon adsorption and desorption method. Performing bed layer heat storage compensation on the standard temperature in the desorption link according to the temperature fluctuation characteristic of the adsorption bed layer in the adsorption link and the environment temperature of the adsorption bed layer to obtain the heat storage compensation temperature of each desorption stage in the desorption link; performing stage desorption on the activated carbon adsorbent based on the desorption duration of each desorption stage in the desorption link and all the heat storage compensation temperatures, and extracting the desorption residual quantity of pollutants in the activated carbon adsorbent from the pollutant concentration information of a stage desorption outlet; the effective desorption rate of the activated carbon adsorbent is determined according to the desorption residual quantity and the current adsorption capacity, and the critical adsorption capacity of the activated carbon adsorbent in the next cycle is cyclically updated based on the effective desorption rate. Based on the scheme, bed layer heat storage compensation in activated carbon critical adsorption capacity updating can be achieved.

Description

Technical Field

[0001] This application relates to the field of activated carbon adsorption and desorption technology, and more specifically, to an activated carbon adsorption and desorption system and method. Background Technology

[0002] Activated carbon adsorption-desorption is a common wastewater treatment technology, mainly used to remove harmful substances from industrial wastewater. In industrial production processes, many processes generate wastewater containing harmful gases. If discharged directly without treatment, it will cause serious environmental pollution and even endanger human health.

[0003] In existing activated carbon adsorption-desorption systems, traditional temperature control methods often employ fixed standard temperatures for desorption operations, failing to adequately consider the actual thermal state generated within the bed during the adsorption stage. Because pollutants undergo exothermic reactions during adsorption, significant differences in heat accumulation exist across different regions of the bed. Current technologies lack dynamic sensing and compensation mechanisms for this non-uniform thermal field. When the system transitions to the desorption stage, the fixed-temperature heating method cannot adapt to the actual heat storage requirements of different parts of the bed, resulting in localized areas with insufficient or excessive temperatures. Areas with insufficient temperatures struggle to effectively desorb pollutants, leaving a large amount of undesorbed material in the activated carbon micropores; while areas with excessively high temperatures may trigger the decomposition or sintering of heat-sensitive pollutants, further reducing the adsorption performance of the activated carbon. This mismatch between thermal state and temperature control not only affects the single-cycle desorption effect but also leads to a continuous decline in activated carbon adsorption capacity due to the accumulation of residual pollutants, ultimately resulting in a decrease in overall system processing efficiency and an increase in operating costs. Therefore, achieving bed heat storage compensation during the critical adsorption capacity update of activated carbon has become a challenging problem for the industry. Summary of the Invention

[0004] This application provides an activated carbon adsorption-desorption system and method, which can realize bed heat storage compensation in the renewal of activated carbon critical adsorption capacity.

[0005] In a first aspect, this application provides a method for regulating the adsorption-desorption cycle of activated carbon, the method comprising: In the adsorption process, the inlet and outlet pollutant concentrations of the polluted wastewater are monitored, and the current adsorption capacity of the activated carbon adsorbent in the adsorption process is determined based on the concentration difference between the inlet and outlet pollutant concentrations and the mass of the activated carbon adsorbent. When the current adsorption capacity is higher than the critical adsorption capacity of the activated carbon adsorbent, the temperature fluctuation characteristics of the adsorption bed in the adsorption process are extracted, the segmented desorption of the activated carbon adsorbent is initiated, and the standard temperature in the desorption process is compensated for by the temperature fluctuation characteristics and the ambient temperature of the adsorption bed to obtain the heat compensation temperature of each desorption stage in the desorption process. The desorption time of each desorption stage in the desorption process is obtained. Based on each desorption time and all heat storage compensation temperatures, the activated carbon adsorbent is desorbed in stages. During the stage desorption, the pollutant concentration information at the stage desorption outlet is collected. The desorption residue of pollutants in the activated carbon adsorbent is extracted from the pollutant concentration information. The effective desorption rate of the activated carbon adsorbent is determined by the desorption residue and the current adsorption capacity, and the critical adsorption capacity of the activated carbon adsorbent in the next cycle is updated based on the effective desorption rate.

[0006] In some embodiments, determining the current adsorption capacity of the activated carbon adsorbent in the adsorption process based on the concentration difference between the inlet pollutant concentration and the outlet pollutant concentration, combined with the mass of the activated carbon adsorbent, specifically includes: Determine the concentration difference between the inlet pollutant concentration and the outlet pollutant concentration; To obtain the wastewater flow rate and the mass of activated carbon adsorbent in the adsorption process; The current adsorption capacity of the activated carbon adsorbent in the adsorption process is determined by the concentration difference, the wastewater flow rate, and the mass of the activated carbon adsorbent.

[0007] In some embodiments, the temperature fluctuation characteristics of the adsorption bed in the extraction adsorption process specifically include: Collect temperature information at different locations in the adsorption bed during the adsorption process; Extract the temperature fluctuation amplitude at different locations in the adsorption bed from various temperature data; The temperature fluctuation characteristics of the adsorption bed in the adsorption process are determined by measuring all temperature fluctuation amplitudes.

[0008] In some embodiments, the standard temperature in the desorption process is compensated for by the temperature fluctuation characteristics and the ambient temperature of the adsorption bed, and the heat storage compensation temperature for each desorption stage is obtained, specifically including: For each desorption stage in the desorption process, obtain the standard temperature of the desorption stage; The influence of the temperature fluctuation characteristics and the ambient temperature of the adsorption bed on the heat storage of the bed during the desorption stage is evaluated to obtain the heat storage compensation value of the desorption temperature during the desorption stage. The heat storage compensation temperature for the desorption stage is determined based on the heat storage compensation value and the standard temperature, thereby obtaining the heat storage compensation temperature for each desorption stage in the desorption process.

[0009] In some embodiments, extracting the desorption residue of pollutants in the activated carbon adsorbent from the pollutant concentration information specifically includes: The desorption amount of activated carbon adsorbent is determined by the pollutant concentration information. Obtain the initial mass of the activated carbon adsorbent; The residual amount of pollutants in the activated carbon adsorbent is determined based on the initial mass and the desorption amount.

[0010] In some embodiments, determining the effective desorption rate of the activated carbon adsorbent by the desorption residue and the current adsorption capacity specifically includes: To obtain environmental interference factors during the current stage of activated carbon adsorbent desorption; The effective desorption amount of activated carbon adsorbent is determined by the environmental interference factors and the desorption residue. The effective desorption rate of the activated carbon adsorbent is determined based on the effective desorption amount and the current adsorption capacity.

[0011] In some embodiments, the cyclic renewal of the critical adsorption capacity of the activated carbon adsorbent in the next cycle based on the effective desorption rate specifically includes: To obtain the critical adsorption capacity and update threshold of activated carbon adsorbent; When the effective desorption rate is lower than the update threshold, the critical adsorption amount is updated based on the efficiency difference between the effective desorption rate and the update threshold, thereby completing the update of the critical adsorption amount of the activated carbon adsorbent in the next cycle.

[0012] Secondly, this application provides an activated carbon adsorption-desorption system, including a circulation adjustment unit, the circulation adjustment unit comprising: The monitoring module is used to monitor the inlet and outlet pollutant concentrations of polluted wastewater in the adsorption process, and determine the current adsorption capacity of the activated carbon adsorbent in the adsorption process based on the concentration difference between the inlet and outlet pollutant concentrations and the mass of the activated carbon adsorbent. The processing module is used to extract the temperature fluctuation characteristics of the adsorption bed in the adsorption process when the current adsorption capacity is higher than the critical adsorption capacity of the activated carbon adsorbent, start the segmented desorption of the activated carbon adsorbent, and perform bed heat storage compensation on the standard temperature in the desorption process through the temperature fluctuation characteristics and the ambient temperature of the adsorption bed to obtain the heat storage compensation temperature of each desorption stage in the desorption process. The processing module is also used to obtain the desorption time of each desorption stage in the desorption process, perform staged desorption of the activated carbon adsorbent based on each desorption time and all heat storage compensation temperatures, collect pollutant concentration information at the stage desorption outlet during stage desorption, and extract the desorption residue of pollutants in the activated carbon adsorbent from the pollutant concentration information. The execution module is used to determine the effective desorption rate of the activated carbon adsorbent by means of the desorption residue and the current adsorption capacity, and to update the critical adsorption capacity of the activated carbon adsorbent in the next cycle based on the effective desorption rate.

[0013] Thirdly, this application provides a computer device, the computer device including a memory and a processor, the memory for storing a computer program, and the processor for calling and running the computer program from the memory, so that the computer device performs the above-described activated carbon adsorption-desorption cycle regulation method.

[0014] Fourthly, this application provides a computer-readable storage medium storing instructions or code that, when executed on a computer, cause the computer to implement the above-described activated carbon adsorption-desorption cycle regulation method.

[0015] The technical solutions provided by the embodiments disclosed in this application have the following beneficial effects: This application provides an activated carbon adsorption-desorption system and method, in which the inlet and outlet pollutant concentrations of polluted wastewater are monitored during the adsorption stage. Based on the concentration difference between the inlet and outlet pollutant concentrations and the mass of the activated carbon adsorbent, the current adsorption capacity of the activated carbon adsorbent in the adsorption stage is determined. When the current adsorption capacity is higher than the critical adsorption capacity of the activated carbon adsorbent, the temperature fluctuation characteristics of the adsorption bed in the adsorption stage are extracted, and the segmented desorption of the activated carbon adsorbent is initiated. The standard temperature in the desorption stage is adjusted based on the temperature fluctuation characteristics and the ambient temperature of the adsorption bed. Heat storage compensation is performed on the adsorbent bed to obtain the heat storage compensation temperature for each desorption stage in the desorption process; the desorption duration of each desorption stage is obtained; based on each desorption duration and all heat storage compensation temperatures, staged desorption is performed on the activated carbon adsorbent; pollutant concentration information at the stage desorption outlet is collected during stage desorption; the desorption residue of pollutants in the activated carbon adsorbent is extracted from the pollutant concentration information; the effective desorption rate of the activated carbon adsorbent is determined by the desorption residue and the current adsorption capacity; and the critical adsorption capacity of the activated carbon adsorbent in the next cycle is updated based on the effective desorption rate.

[0016] Therefore, in this application, the effective desorption rate of the activated carbon adsorbent is determined by the desorption residue and the current adsorption capacity. Based on the effective desorption rate, the critical adsorption capacity of the activated carbon adsorbent in the next cycle is cyclically updated. First, by determining the heat storage compensation temperature, precise desorption temperature control parameters can be obtained, thereby achieving dynamic thermal balance optimization of the activated carbon bed. In the adsorption process, the activated carbon bed will form a non-uniform temperature field distribution due to the heat release from pollutant adsorption and environmental factors. By extracting the temperature fluctuation characteristics of the adsorption bed and combining it with the ambient temperature data, the system can quantify the influence of bed heat storage on the desorption process, so that the set temperature of each desorption stage is precisely matched with the actual thermal state of the bed. This overcomes the energy waste problem caused by traditional fixed-temperature desorption, ensuring that each area of ​​the bed can reach the optimal desorption temperature. This allows the use of residual heat from adsorption to significantly reduce the external energy input in the desorption process, thereby eliminating the phenomenon of incomplete local desorption in the bed. At the same time, the temperature... Precise control of the activated carbon's pore structure extends its service life. Then, by determining the desorption residue, a quantitative indicator of the activated carbon regeneration effect can be obtained, establishing a closed-loop control logic for critical adsorption capacity (CAC) updates. This allows for an objective evaluation of the effectiveness of the current desorption and regeneration process. The desorption residue, as a process variable, reveals the equilibrium state between adsorption and desorption. Combined with the current adsorption capacity, the performance degradation trend of the activated carbon can be determined. Furthermore, based on the comparison between the effective desorption rate and a preset threshold, the system can intelligently adjust the CAC for the next cycle. If desorption is incomplete, the CAC is lowered to avoid premature saturation; if desorption is sufficient, the CAC is appropriately increased to extend the adsorption cycle. This feedback mechanism, centered on the desorption residue, makes the CAC no longer a static parameter but a process variable that dynamically evolves with the actual state of the activated carbon, ultimately achieving dual optimization of system processing efficiency and operational economy. In summary, the above scheme can realize bed heat storage compensation in the CAC update process. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is an exemplary flowchart of an activated carbon adsorption-desorption cycle regulation method according to some embodiments of this application; Figure 2 This is a schematic diagram illustrating the working principle of activated carbon adsorption and desorption as shown in some embodiments of this application; Figure 3 This is a flowchart illustrating the process of determining the effective desorption rate according to some embodiments of this application; Figure 4 This is a schematic diagram of the structure of a cyclic adjustment unit according to some embodiments of this application; Figure 5 This is a schematic diagram of the structure of a computer device for implementing a method for regulating the cycle of activated carbon adsorption and desorption, according to some embodiments of this application. Detailed Implementation

[0019] To better understand the technical solution of this application, the technical solution of this application will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] refer to Figure 1 The figure is an exemplary flowchart of an activated carbon adsorption-desorption cycle adjustment method according to some embodiments of this application. The activated carbon adsorption-desorption cycle adjustment method mainly includes the following steps: In step 101, the inlet and outlet pollutant concentrations of the polluted wastewater are monitored during the adsorption process. The current adsorption capacity of the activated carbon adsorbent in the adsorption process is determined based on the concentration difference between the inlet and outlet pollutant concentrations and the mass of the activated carbon adsorbent.

[0021] It should be noted that, in this application, the inlet pollutant concentration refers to the pollutant content of the wastewater to be treated before entering the activated carbon adsorption system. The inlet pollutant concentration can reflect the initial pollution load of the wastewater. The outlet pollutant concentration refers to the pollutant content of the wastewater after being treated by activated carbon adsorption. The outlet pollutant concentration can be used to evaluate the adsorption effect and the real-time adsorption state of the activated carbon. The inlet and outlet pollutant concentrations are expressed as mass concentrations, with the unit being mg / L.

[0022] In practice, before the wastewater enters the adsorption system, an online water quality analyzer (e.g., a UV-Vis spectrophotometer) is installed to directly measure the concentration of the target pollutant in the wastewater as the inlet pollutant concentration. A detection point is set downstream of the adsorption bed, using the same analytical instrument as the inlet to ensure data comparability. The pollutant concentration collected at the detection point is then used as the outlet pollutant concentration.

[0023] In some embodiments, reference Figure 2 The figure described herein is a schematic diagram illustrating the working principle of activated carbon adsorption-desorption according to some embodiments of this application. The figure shows the working principle of a typical activated carbon adsorption-desorption system. The system includes two adsorption beds (adsorption bed A and adsorption bed B), which alternately perform adsorption and desorption operations. Waste gas generated from the pollution source is first introduced into adsorption bed A by a main fan, where organic pollutants are adsorbed by activated carbon. The purified gas is then discharged into the atmosphere.

[0024] When the activated carbon in adsorption bed A reaches saturation, the system switches to adsorption bed B for adsorption, while adsorption bed A enters the desorption stage. During desorption, fresh air is introduced by a drying fan, and the saturated activated carbon is heated using heat from a heat exchanger, causing the adsorbed organic pollutants to be released. The released concentrated organic waste gas is then guided to a catalytic oxidation system for further CO treatment, ultimately converting it into harmless carbon dioxide and water vapor, completing the entire purification process. Simultaneously, the system is equipped with a waste heat recovery device to recover the heat generated during desorption, improving energy efficiency.

[0025] In some embodiments, determining the current adsorption capacity of the activated carbon adsorbent in the adsorption process based on the concentration difference between the inlet pollutant concentration and the outlet pollutant concentration, combined with the mass of the activated carbon adsorbent, can be achieved using the following steps: Determine the concentration difference between the inlet pollutant concentration and the outlet pollutant concentration; To obtain the wastewater flow rate and the mass of activated carbon adsorbent in the adsorption process; The current adsorption capacity of the activated carbon adsorbent in the adsorption process is determined by the concentration difference, the wastewater flow rate, and the mass of the activated carbon adsorbent.

[0026] It should be noted that, in this application, the current adsorption capacity refers to the amount of pollutants adsorbed by a unit mass of activated carbon at a certain moment, with the unit being mg / g; the concentration difference is the concentration difference reflecting the effect of activated carbon on pollutant removal; the wastewater flow rate represents the total amount of wastewater passing through the adsorption system; and the mass of the activated carbon adsorbent refers to the total weight of activated carbon loaded in the adsorption system, with the unit being g.

[0027] In specific implementation, firstly, the concentration difference between the inlet pollutant concentration and the outlet pollutant concentration can be determined by subtracting the inlet pollutant concentration from the outlet pollutant concentration as the concentration difference. Secondly, the wastewater flow rate and the mass of activated carbon adsorbent in the adsorption stage can be obtained by monitoring the wastewater flow rate in the adsorption stage using an ultrasonic flow meter, obtaining the mass of activated carbon adsorbent from the initial loading record of the adsorption system, and dynamically updating the activated carbon adsorbent by periodically replenishing it if the system is a fluidized bed using a mass sensor or by loading volume-density conversion. Finally, the current adsorption capacity of activated carbon adsorbent in the adsorption stage can be determined by multiplying the concentration difference by the wastewater flow rate based on the mass difference, the current mass of activated carbon adsorbent, and the mass of activated carbon adsorbent as the current adsorption capacity per unit mass of activated carbon, based on the principle of mass conservation.

[0028] In step 102, when the current adsorption capacity is higher than the critical adsorption capacity of the activated carbon adsorbent, the temperature fluctuation characteristics of the adsorption bed in the adsorption process are extracted, and the segmented desorption of the activated carbon adsorbent is initiated. The standard temperature in the desorption process is compensated for by the temperature fluctuation characteristics and the ambient temperature of the adsorption bed, so as to obtain the heat compensation temperature of each desorption stage in the desorption process.

[0029] It should be noted that, in this application, the critical adsorption capacity refers to the pollutant load at which the activated carbon adsorbent reaches its effective adsorption capacity limit under specified operating conditions. This critical adsorption capacity can be determined through experimental calibration or historical data statistics and stored in the control panel of the activated carbon adsorption system. This critical adsorption capacity reflects the threshold at which activated carbon maintains ideal adsorption efficiency. Exceeding the critical adsorption capacity will lead to a significant decrease in adsorption performance. When the current adsorption capacity exceeds the critical adsorption capacity of the activated carbon adsorbent, it indicates that the adsorption capacity of the activated carbon adsorbent is close to saturation, and its pore structure is approaching its limit for the effective adsorption of pollutants. Continued operation will lead to a significant decrease in adsorption efficiency and the risk of pollutant penetration. At this time, it is necessary to start the regeneration program of the activated carbon adsorbent to restore the adsorption performance of the activated carbon through the desorption process. At the same time, this state also reflects the actual treatment capacity of the activated carbon under the current operating conditions, providing an important basis for process optimization and material replacement. The determination of the critical adsorption capacity is a key control indicator for maintaining the continuous and stable operation of the adsorption system.

[0030] In some embodiments, the temperature fluctuation characteristics of the adsorption bed in the adsorption process can be achieved by the following steps: Collect temperature information at different locations in the adsorption bed during the adsorption process; Extract the temperature fluctuation amplitude at different locations in the adsorption bed from various temperature data; The temperature fluctuation characteristics of the adsorption bed in the adsorption process are determined by measuring all temperature fluctuation amplitudes.

[0031] It should be noted that, in this application, temperature fluctuation characteristics refer to the temperature change pattern of the adsorption bed during the adsorption process; temperature information is the temperature value reflecting the local thermal effect during the adsorption process; and temperature fluctuation amplitude indicates the degree of drastic temperature change at different locations in the adsorption bed.

[0032] In specific implementation, firstly, the temperature information at different locations in the adsorption bed during the adsorption process can be collected in the following way: Multiple high-precision temperature sensors (e.g., PT100 platinum resistance thermometers or thermocouples) are placed at key locations in the adsorption bed (e.g., the inlet, outlet, and middle) to record the temperature information at each location in real time at a fixed sampling frequency (default 1 time / second). In other embodiments, the temperature sensors can be allocated according to requirements; this is not limited here, as long as the sensors are evenly distributed to ensure coverage of the bed's cross-section and depth. The data is transmitted to the central monitoring system via wired or wireless transmission, while simultaneously undergoing signal anti-interference processing. Then, the temperature fluctuation amplitude at different locations in the adsorption bed can be extracted from the various temperature information using the following method: The method is as follows: For each location in the adsorption bed, acquire the corresponding temperature information, statistically analyze all the maximum and minimum values ​​in the temperature information, calculate the difference between each maximum value and its adjacent minimum value as the temperature fluctuation value of each maximum value, remove the maximum and minimum values ​​among all temperature fluctuation values, and calculate the average of the remaining temperature fluctuation values ​​as the temperature fluctuation amplitude at the location. The temperature fluctuation amplitude at each location in the adsorption bed can be obtained through the above method. Finally, the temperature fluctuation characteristics of the adsorption bed in the adsorption process can be determined by using the average of all temperature fluctuation amplitudes as the temperature fluctuation characteristics of the adsorption bed in the adsorption process.

[0033] In some embodiments, the standard temperature in the desorption process is compensated for by the temperature fluctuation characteristics and the ambient temperature of the adsorption bed to obtain the heat storage compensation temperature for each desorption stage. This can be achieved by the following steps: For each desorption stage in the desorption process, obtain the standard temperature of the desorption stage; The influence of the temperature fluctuation characteristics and the ambient temperature of the adsorption bed on the heat storage of the bed during the desorption stage is evaluated to obtain the heat storage compensation value of the desorption temperature during the desorption stage. The heat storage compensation temperature for the desorption stage is determined based on the heat storage compensation value and the standard temperature, thereby obtaining the heat storage compensation temperature for each desorption stage in the desorption process.

[0034] It should be noted that in this application, the heat storage compensation temperature refers to the actual control temperature of the desorption stage; the standard temperature refers to the pre-set target temperature of the desorption stage; the heat storage compensation value refers to the amount of adjustment to the standard temperature to offset the heat storage effect of the bed, and the heat storage effect of the bed refers to the additional heat accumulated in the activated carbon bed due to the exothermic reaction during the adsorption stage.

[0035] In specific implementation, firstly, for each desorption stage in the desorption process, the standard temperature of the desorption stage can be obtained in the following way: Based on the activated carbon regeneration process requirements, a basic temperature curve for each desorption stage is set for different pollutants, for example: 80℃ for the preheating stage, 200℃ for the main desorption stage, and 50℃ for the cooling stage. This parameter is stored in the control system database and can be automatically retrieved when switching activated carbon types. For each desorption stage in the desorption process, the standard temperature of the desorption stage is obtained from the activated carbon adsorbent control system database. Then, the impact of the temperature fluctuation characteristics and the ambient temperature of the adsorption bed on the heat storage of the bed in the desorption stage is evaluated. The heat storage compensation value of the desorption temperature in the desorption stage can be obtained in the following way: [The text abruptly ends here, so the translation stops here as well.] The ambient temperature of the adsorption bed at the end of adsorption is measured using a temperature sensor. The sum of the ambient temperature and the temperature fluctuation characteristics is taken as the bed heat storage temperature during the desorption stage. The influence factor of bed heat storage on the desorption temperature of activated carbon adsorbent is calculated from the control system database of activated carbon adsorbent. The product of this influence factor and the bed heat storage temperature is taken as the heat storage compensation value of the desorption temperature during the desorption stage. Finally, the heat storage compensation temperature of the desorption stage is determined according to the heat storage compensation value and the standard temperature. Thus, the heat storage compensation temperature of each desorption stage in the desorption process can be obtained by the following method: the sum of the heat storage compensation value and the standard temperature is taken as the heat storage compensation temperature of the desorption stage. The heat storage compensation temperature of each desorption stage in the desorption process can be obtained by the above method.

[0036] In step 103, the desorption duration of each desorption stage in the desorption process is obtained. Based on each desorption duration and all heat storage compensation temperatures, the activated carbon adsorbent is desorbed in stages. During the stage desorption, the pollutant concentration information at the stage desorption outlet is collected, and the desorption residue of pollutants in the activated carbon adsorbent is extracted from the pollutant concentration information.

[0037] It should be noted that in this application, the desorption duration refers to the duration of each desorption stage; the pollutant concentration information refers to the real-time concentration data of pollutants discharged from the bed outlet during the desorption process, which can reflect the desorption progress and effect.

[0038] In specific implementation, firstly, the desorption duration of each desorption stage in the desorption process can be obtained by retrieving the desorption duration of each desorption stage from the activated carbon adsorbent process database. Secondly, the staged desorption of the activated carbon adsorbent based on each desorption duration and all heat compensation temperatures can be achieved by using the heat compensation temperature of each desorption stage as the desorption temperature and continuing for the corresponding desorption duration to complete the staged desorption of the activated carbon adsorbent in that stage. The staged desorption of the activated carbon adsorbent in each desorption stage can be completed in the above manner. Finally, the pollutant concentration information at the stage desorption outlet can be collected by using an online water quality analyzer (e.g., UV-Vis spectrophotometer) at fixed intervals (default 1 second) during staged desorption, thereby using the set of all pollutant concentrations as the pollutant concentration information at the stage desorption outlet.

[0039] In some embodiments, extracting the desorption residue of pollutants in the activated carbon adsorbent from the pollutant concentration information can be achieved by the following steps: The desorption amount of activated carbon adsorbent is determined by the pollutant concentration information. Obtain the initial mass of the activated carbon adsorbent; The residual amount of pollutants in the activated carbon adsorbent is determined based on the initial mass and the desorption amount.

[0040] It should be noted that in this application, the desorption residue refers to the proportion of pollutants that remain in the pores of activated carbon after desorption; the desorption amount refers to the total amount of pollutants desorbed and discharged from the surface of activated carbon during the desorption stage, and the desorption amount can reflect the degree of regeneration of activated carbon; the initial mass refers to the total mass of activated carbon adsorbent before desorption, which includes the mass of the activated carbon itself and the mass of the adsorbed pollutants.

[0041] In specific implementation, firstly, determining the desorption amount of the activated carbon adsorbent based on the pollutant concentration information can be achieved by calculating the definite integral of all pollutant concentrations in the pollutant concentration information as the desorption amount of the activated carbon adsorbent. Secondly, obtaining the initial mass of the activated carbon adsorbent can be achieved by measuring the total mass of the adsorption bed using an embedded weighing sensor before desorption, and subtracting the bed's own weight from the total mass of the adsorption bed to obtain the initial mass of the activated carbon adsorbent. Finally, determining the residual amount of pollutants in the activated carbon adsorbent based on the initial mass and the desorption amount can be achieved by using the ratio of the desorption amount to the initial mass as the residual amount of pollutants in the activated carbon adsorbent.

[0042] In step 104, the effective desorption rate of the activated carbon adsorbent is determined by the desorption residue and the current adsorption capacity, and the critical adsorption capacity of the activated carbon adsorbent in the next cycle is updated based on the effective desorption rate.

[0043] In some embodiments, the effective desorption rate of the activated carbon adsorbent is determined by the desorption residue and the current adsorption capacity, with reference to... Figure 3 The diagram is a flowchart illustrating the determination of the effective desorption rate in some embodiments of this application. In this embodiment, the determination of the effective desorption rate can be achieved through the following steps: In step 1041, the environmental disturbance factors of the activated carbon adsorbent during the current stage of desorption are obtained; In step 1042, the effective desorption amount of the activated carbon adsorbent is determined by the environmental interference factor and the desorption residue. In step 1043, the effective desorption rate of the activated carbon adsorbent is determined based on the effective desorption amount and the current adsorption capacity.

[0044] It should be noted that in this application, the effective desorption rate indicates the degree of complete regeneration of the activated carbon adsorbent after desorption; the environmental interference factor refers to the degree of influence of external environmental factors on the accuracy of pollutant measurement during the desorption process; and the effective desorption amount is the desorption amount that reflects the true regeneration effect.

[0045] In specific implementation, firstly, the environmental interference factor of the activated carbon adsorbent in the current stage of desorption can be obtained in the following way: obtain the environmental parameters in the current stage of desorption, and obtain the interference factor of the environmental parameters on the desorption amount of the activated carbon adsorbent from the activated carbon adsorbent process database as the environmental interference factor of the activated carbon adsorbent in the current stage of desorption; then, the effective desorption amount of the activated carbon adsorbent can be determined by the environmental interference factor and the desorption residue as follows: the product of the environmental interference factor and the desorption residue is taken as the effective desorption amount of the activated carbon adsorbent; finally, the effective desorption rate of the activated carbon adsorbent can be determined by the ratio of the effective desorption amount to the current adsorption capacity as the effective desorption rate of the activated carbon adsorbent.

[0046] In some embodiments, the critical adsorption capacity of the activated carbon adsorbent in the next cycle can be refreshed based on the effective desorption rate by the following steps: To obtain the critical adsorption capacity and update threshold of activated carbon adsorbent; When the effective desorption rate is lower than the update threshold, the critical adsorption amount is updated based on the efficiency difference between the effective desorption rate and the update threshold, thereby completing the update of the critical adsorption amount of the activated carbon adsorbent in the next cycle.

[0047] In specific implementation, firstly, obtaining the critical adsorption capacity and update threshold of the activated carbon adsorbent can be achieved in the following way: The critical adsorption capacity and update threshold of the activated carbon adsorbent are obtained from the control panel of the activated carbon adsorption system. This update threshold is used to determine whether the critical adsorption capacity needs to be adjusted. Then, when the effective desorption rate is lower than the update threshold, the critical adsorption capacity is updated based on the efficiency difference between the effective desorption rate and the update threshold. This update of the critical adsorption capacity of the activated carbon adsorbent in the next cycle can be achieved in the following way: When the effective desorption rate is greater than the update threshold, the current critical adsorption capacity is maintained; when the effective desorption rate is lower than the update threshold, the difference between the update threshold and the effective desorption rate is calculated as the efficiency difference. The adjustment ratio corresponding to the efficiency difference is obtained from the update mapping table of the activated carbon adsorption system control panel. The product of the critical adsorption capacity and this adjustment ratio is used as the update value of the critical adsorption capacity. This update value is used as the critical adsorption capacity of the activated carbon adsorbent in the next cycle. The update of the critical adsorption capacity of the activated carbon adsorbent in the next cycle can be completed in the above way.

[0048] In another aspect, in some embodiments, this application provides an activated carbon adsorption-desorption system, which includes a circulation regulating unit, as referenced. Figure 4 The figure is a schematic diagram of the structure of a loop adjustment unit according to some embodiments of this application. The loop adjustment unit includes a monitoring module 201, a processing module 202, and an execution module 203, which are described below: Monitoring module 201, in this application, is mainly used to monitor the inlet pollutant concentration and outlet pollutant concentration of polluted wastewater in the adsorption stage, and to determine the current adsorption capacity of activated carbon adsorbent in the adsorption stage based on the concentration difference between the inlet pollutant concentration and the outlet pollutant concentration and the mass of activated carbon adsorbent. Processing module 202, in this application, is used to extract the temperature fluctuation characteristics of the adsorption bed in the adsorption process when the current adsorption capacity is higher than the critical adsorption capacity of the activated carbon adsorbent, start the segmented desorption of the activated carbon adsorbent, and perform bed heat storage compensation on the standard temperature in the desorption process through the temperature fluctuation characteristics and the ambient temperature of the adsorption bed to obtain the heat storage compensation temperature of each desorption stage in the desorption process. It should be noted that the processing module 202 is also used to obtain the desorption time of each desorption stage in the desorption process, perform staged desorption of the activated carbon adsorbent based on each desorption time and all heat storage compensation temperatures, collect pollutant concentration information at the stage desorption outlet during stage desorption, and extract the desorption residue of pollutants in the activated carbon adsorbent from the pollutant concentration information. The execution module 203 in this application is mainly used to determine the effective desorption rate of the activated carbon adsorbent by means of the desorption residue and the current adsorption capacity, and to update the critical adsorption capacity of the activated carbon adsorbent in the next cycle based on the effective desorption rate.

[0049] The foregoing has detailed examples of activated carbon adsorption-desorption systems and methods provided in the embodiments of this application. It is understood that the corresponding apparatus, in order to achieve the above functions, includes hardware structures and / or software modules corresponding to the execution of each function. Those skilled in the art should readily recognize that, in conjunction with the units and algorithm steps of the various examples described in the embodiments disclosed herein, this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed in hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0050] In some embodiments, this application also provides a computer device, the computer device including a memory and a processor, the memory for storing a computer program, and the processor for calling and running the computer program from the memory, so that the computer device performs the activated carbon adsorption-desorption cycle regulation method described above.

[0051] In some embodiments, reference Figure 5 The dashed lines in the figure indicate that the unit or module is optional. This figure is a schematic diagram of the structure of a computer device for implementing an activated carbon adsorption-desorption cycle regulation method according to an embodiment of this application. The activated carbon adsorption-desorption cycle regulation method described in the above embodiments can be achieved through… Figure 5 The computer device shown is used to implement this, and the computer device includes at least one processor 301, a memory 302 and at least one communication unit 305. The computer device may be a terminal device, a server or a chip.

[0052] Processor 301 can be a general-purpose processor or a special-purpose processor. For example, processor 301 can be a central processing unit (CPU), which can be used to control computer devices, execute software programs, and process data from software programs. The computer device may also include a communication unit 305 for inputting (receiving) and outputting (transmitting) signals.

[0053] For example, the computer device may be a chip, and the communication unit 305 may be the input and / or output circuit of the chip, or the communication unit 305 may be the communication interface of the chip, which may be a component of a terminal device, network device or other device.

[0054] For example, the computer device may be a terminal device or a server, and the communication unit 305 may be a transceiver of the terminal device or the server, or the communication unit 305 may be a transceiver circuit of the terminal device or the server.

[0055] The computer device may include one or more memories 302 storing a program 304. The program 304 can be executed by a processor 301 to generate instructions 303, causing the processor 301 to execute the method described in the above method embodiments according to the instructions 303. Optionally, the memory 302 may also store data (such as a target audit model). Optionally, the processor 301 may also read data stored in the memory 302, which may be stored at the same storage address as the program 304, or it may be stored at a different storage address than the program 304.

[0056] The processor 301 and memory 302 can be configured separately or integrated together, for example, integrated on the system on chip (SOC) of the terminal device.

[0057] It should be understood that each step of the above method embodiment can be completed by hardware logic circuits or software instructions in the processor 301. The processor 301 can be a CPU, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, such as discrete gate, transistor logic devices, or discrete hardware components.

[0058] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0059] For example, in some embodiments, this application also provides a computer-readable storage medium storing instructions or code that, when executed on a computer, cause the computer to implement the above-described activated carbon adsorption-desorption cycle regulation method.

[0060] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0061] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A method for regulating the adsorption-desorption cycle of activated carbon, characterized in that, The method includes the following steps: In the adsorption process, the inlet and outlet pollutant concentrations of the polluted wastewater are monitored, and the current adsorption capacity of the activated carbon adsorbent in the adsorption process is determined based on the concentration difference between the inlet and outlet pollutant concentrations and the mass of the activated carbon adsorbent. When the current adsorption capacity is higher than the critical adsorption capacity of the activated carbon adsorbent, the temperature fluctuation characteristics of the adsorption bed in the adsorption process are extracted, the segmented desorption of the activated carbon adsorbent is initiated, and the standard temperature in the desorption process is compensated for by the temperature fluctuation characteristics and the ambient temperature of the adsorption bed to obtain the heat compensation temperature of each desorption stage in the desorption process. The desorption time of each desorption stage in the desorption process is obtained. Based on each desorption time and all heat storage compensation temperatures, the activated carbon adsorbent is desorbed in stages. During the stage desorption, the pollutant concentration information at the stage desorption outlet is collected. The desorption residue of pollutants in the activated carbon adsorbent is extracted from the pollutant concentration information. The effective desorption rate of the activated carbon adsorbent is determined by the desorption residue and the current adsorption capacity, and the critical adsorption capacity of the activated carbon adsorbent in the next cycle is updated based on the effective desorption rate.

2. The method as described in claim 1, characterized in that, Determining the current adsorption capacity of the activated carbon adsorbent in the adsorption process based on the concentration difference between the inlet pollutant concentration and the outlet pollutant concentration, combined with the mass of the activated carbon adsorbent, specifically includes: Determine the concentration difference between the inlet pollutant concentration and the outlet pollutant concentration; To obtain the wastewater flow rate and the mass of activated carbon adsorbent in the adsorption process; The current adsorption capacity of the activated carbon adsorbent in the adsorption process is determined by the concentration difference, the wastewater flow rate, and the mass of the activated carbon adsorbent.

3. The method as described in claim 1, characterized in that, The temperature fluctuation characteristics of the adsorption bed in the extraction and adsorption process specifically include: Collect temperature information at different locations in the adsorption bed during the adsorption process; Extract the temperature fluctuation amplitude at different locations in the adsorption bed from various temperature data; The temperature fluctuation characteristics of the adsorption bed in the adsorption process are determined by measuring all temperature fluctuation amplitudes.

4. The method as described in claim 1, characterized in that, By using the temperature fluctuation characteristics and the ambient temperature of the adsorption bed to compensate for the standard temperature in the desorption process, the heat storage compensation temperature for each desorption stage is obtained, specifically including: For each desorption stage in the desorption process, obtain the standard temperature of the desorption stage; The influence of the temperature fluctuation characteristics and the ambient temperature of the adsorption bed on the heat storage of the bed during the desorption stage is evaluated to obtain the heat storage compensation value of the desorption temperature during the desorption stage. The heat storage compensation temperature for the desorption stage is determined based on the heat storage compensation value and the standard temperature, thereby obtaining the heat storage compensation temperature for each desorption stage in the desorption process.

5. The method as described in claim 1, characterized in that, Extracting the desorption residue of pollutants from the activated carbon adsorbent from the pollutant concentration information specifically includes: The desorption amount of activated carbon adsorbent is determined by the pollutant concentration information. Obtain the initial mass of the activated carbon adsorbent; The residual amount of pollutants in the activated carbon adsorbent is determined based on the initial mass and the desorption amount.

6. The method as described in claim 1, characterized in that, Determining the effective desorption rate of activated carbon adsorbent by using the desorption residue and the current adsorption capacity specifically includes: To obtain environmental interference factors during the current stage of activated carbon adsorbent desorption; The effective desorption amount of activated carbon adsorbent is determined by the environmental interference factors and the desorption residue. The effective desorption rate of the activated carbon adsorbent is determined based on the effective desorption amount and the current adsorption capacity.

7. The method as described in claim 1, characterized in that, The cycle update of the critical adsorption capacity of the activated carbon adsorbent in the next cycle based on the effective desorption rate specifically includes: To obtain the critical adsorption capacity and update threshold of activated carbon adsorbent; When the effective desorption rate is lower than the update threshold, the critical adsorption amount is updated based on the efficiency difference between the effective desorption rate and the update threshold, thereby completing the update of the critical adsorption amount of the activated carbon adsorbent in the next cycle.

8. An activated carbon adsorption-desorption system, the activated carbon adsorption-desorption system comprising a circulation regulating unit, characterized in that, The cycle adjustment unit includes: The monitoring module is used to monitor the inlet and outlet pollutant concentrations of polluted wastewater in the adsorption process, and determine the current adsorption capacity of the activated carbon adsorbent in the adsorption process based on the concentration difference between the inlet and outlet pollutant concentrations and the mass of the activated carbon adsorbent. The processing module is used to extract the temperature fluctuation characteristics of the adsorption bed in the adsorption process when the current adsorption capacity is higher than the critical adsorption capacity of the activated carbon adsorbent, start the segmented desorption of the activated carbon adsorbent, and perform bed heat storage compensation on the standard temperature in the desorption process through the temperature fluctuation characteristics and the ambient temperature of the adsorption bed to obtain the heat storage compensation temperature of each desorption stage in the desorption process. The processing module is also used to obtain the desorption time of each desorption stage in the desorption process, perform staged desorption of the activated carbon adsorbent based on each desorption time and all heat storage compensation temperatures, collect pollutant concentration information at the stage desorption outlet during stage desorption, and extract the desorption residue of pollutants in the activated carbon adsorbent from the pollutant concentration information. The execution module is used to determine the effective desorption rate of the activated carbon adsorbent by means of the desorption residue and the current adsorption capacity, and to update the critical adsorption capacity of the activated carbon adsorbent in the next cycle based on the effective desorption rate.

9. A computer device, characterized in that, The computer device includes a memory and a processor. The memory is used to store computer programs, and the processor is used to call and run the computer programs from the memory, causing the computer device to perform the activated carbon adsorption-desorption cycle regulation method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores instructions or code that, when executed on a computer, cause the computer to implement the activated carbon adsorption-desorption cycle regulation method as described in any one of claims 1 to 7.

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