Activated carbon replacement cycle monitoring system and method

Abstract

The invention relates to the technical field of activated carbon adsorption, and particularly discloses an activated carbon replacement cycle monitoring system and method, and the method comprises the steps: S1, carrying out the industry classification of an activated carbon-related enterprise, and enabling the industry classification to comprise the automobile repair industry, the plastic industry, the rubber production industry and the product industry; s2, obtaining filling data of an activated carbon-related enterprise; s3, pre-processing the filling data of the activated carbon-related enterprises; s4, calculating the continuous working time of the activated carbon according to the industry; and S5, calculating the service life of the activated carbon in each industry according to the continuous working time. By adopting the technical scheme, the service life of the activated carbon can be accurately calculated in combination with industrial characteristics.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of activated carbon adsorption technology, in particular to an activated carbon replacement cycle monitoring system and method. BACKGROUND

[0002] Activated carbon, as a commonly used adsorption material, is widely used in various industries for adsorbing organic waste gas and harmful substances. With the continuous improvement of environmental supervision requirements, the use efficiency and replacement cycle of activated carbon have become important technical parameters for enterprises to comply with the operation. At present, the replacement cycle of activated carbon in the industry mainly depends on manual experience judgment or uses fixed time period for estimation. This method has significant limitations, such as difficulty in adapting to different process conditions, inability to reflect the actual use state, and easy to cause replacement not in time or high frequency, thereby causing increased risk of pollutant emission or resource waste.

[0003] In addition, the traditional monitoring method is mostly based on a single parameter, such as the processing gas volume or the running time, lacks multi-dimensional data support, and is difficult to achieve accurate analysis. Especially in the context of large differences in industry conditions and significant fluctuations in activated carbon use intensity, the fixed period method is particularly unsuitable. At the same time, due to the lack of effective dynamic supervision means, the environmental protection management department has problems such as information lag and incomplete data when monitoring the use of activated carbon by enterprises, and it is difficult to fully grasp the pollution prevention and control status of enterprises.

[0004] Therefore, there is an urgent need for an activated carbon replacement cycle monitoring system and method that can accurately calculate the service life of activated carbon in combination with industry characteristics, to realize dynamic prediction and scientific management of the service life of activated carbon. SUMMARY

[0005] One of the purposes of the present application is to provide an activated carbon replacement cycle monitoring method that can accurately calculate the service life of activated carbon in combination with industry characteristics.

[0006] In order to solve the above technical problems, the present application provides the following technical solutions:

[0007] An activated carbon replacement cycle monitoring method, comprising:

[0008] S1, classifying the activated carbon-related enterprises according to their industries, including the automotive repair industry, the plastic and rubber production and product industry;

[0009] S2, obtaining the reported data of the activated carbon-related enterprises;

[0010] S3, preprocessing the reported data of the activated carbon-related enterprises;

[0011] S4, calculating the continuous working time of the activated carbon according to the industry;

[0012] S5. Calculate the service life of activated carbon in various industries based on continuous working time.

[0013] Furthermore, the method further includes: S6, determining whether the service life of the activated carbon is less than a preset time; if the service life is greater than or equal to the preset time, taking the preset time as the new service life of the activated carbon.

[0014] Furthermore, in step S2, the reported data include the mass of the activated carbon loaded; the annual usage data of various VOCs-related materials; the VOCs content data; the average annual production time of each enterprise and the average daily production time of each enterprise.

[0015] Furthermore, in step S3, it is determined whether the enterprise has reported the mass of the activated carbon loaded. If the enterprise has not reported the mass of the activated carbon loaded, the mass of the activated carbon is calculated by obtaining the iodine value, number of blocks or volume of the activated carbon in the reported data.

[0016] Furthermore, in step S3, the annual average production time of the auto repair industry is the number of painting operations per year. It is determined whether the enterprise has filled in the report. If not, the number of painting operations per year of the auto repair industry enterprise is calculated. 汽修 , the formula is:

[0017]

[0018] Among them, G i is the annual usage data of various VOCs-related materials i, and gc is the average material usage per single painting.

[0019] Further, in step S4,

[0020] If it is the auto repair industry, the continuous working time t of activated carbon is calculated by the following formula:

[0021]

[0022] Where α is the ratio of dynamic activity to static activity;

[0023] W is the mass of activated carbon loaded;

[0024] S is the equilibrium retention amount of activated carbon;

[0025] B 汽修 is the average time per operation;

[0026] η is the adsorption efficiency;

[0027] η0 is the VOCs removal rate of the pretreatment process;

[0028] θ is the exhaust gas collection rate;

[0029] β i is the pollution generation coefficient.

[0030] Further, in step S4,

[0031] For the plastics, rubber production and products industry, the continuous working time t of activated carbon can be calculated using the following formula:

[0032]

[0033] Among them, A 橡胶 The average annual production time of enterprises in the rubber production and products industry; B 橡胶 The average daily production time for companies in the plastics, rubber manufacturing and products industries.

[0034] Furthermore, in step S5, the service life T of activated carbon in each industry is calculated:

[0035]

[0036] Furthermore, in step S3, it is also determined whether there are multiple vehicles spraying paint at the same time. If it is determined that the vehicle is spraying paint at a single time, if A 汽修 >660 times, value A 汽修 If it is determined that there are multiple vehicles painting at the same time, if A 汽修 >660 times, value A 汽修 =660.

[0037] A second object of the present invention is to provide an activated carbon replacement cycle monitoring system using the above method.

[0038] This solution categorizes activated carbon-related companies by industry and, incorporating multi-source data such as activated carbon loading, VOCs material usage and content, production frequency, and duration, establishes an industry-specific model for calculating the continuous operating time and lifespan of activated carbon. This model enables dynamic monitoring of activated carbon replacement cycles. Compared to traditional approaches that rely on experience or single-parameter estimation, this solution accurately matches the process characteristics of the auto repair and plastics and rubber industries, fully accounting for key influencing factors such as equilibrium retention, adsorption efficiency, pretreatment removal rate, and exhaust gas collection rate, significantly improving the accuracy and reliability of activated carbon service life predictions. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 The present invention is a flow chart of Example 1 of a method for monitoring an activated carbon replacement cycle. DETAILED DESCRIPTION

[0040] The following is further described in detail through specific implementation methods:

[0041] Example 1

[0042] like Figure 1As shown, a method for monitoring an activated carbon replacement cycle of this embodiment includes:

[0043] S1. Classify the industries involved in activated carbon enterprises, including auto repair industry, plastics, rubber production and products industry, etc.

[0044] The auto repair industry primarily focuses on spray paint exhaust gas treatment processes, which involve spraying and baking equipment, primarily in spray booths. The materials involved are varnishes, topcoats, curing agents, and thinners that contain VOCs (volatile organic compounds). Some companies use water-based paint.

[0045] The plastics, rubber production and products industry mainly focuses on the waste gas treatment of plastic / rubber hot melting, injection molding and extrusion.

[0046] S2. Obtain the reported data of activated carbon enterprises, including the mass of activated carbon loaded; annual usage data of various VOC-related materials; VOC content data; average annual production time (A) of each enterprise; average daily production time (B) of each enterprise; etc.

[0047] Various VOCs-related materials in the auto repair industry, such as paints (including varnish, primer, curing agent, etc.); various VOCs-related materials in the plastics, rubber production and products industry, such as various plastics, resins, foaming agents, rubber, etc.

[0048] S3. Pre-process the data reported by activated carbon enterprises, including:

[0049] Determine whether the enterprise has reported the mass of the activated carbon filled. If the enterprise has not reported the mass of the activated carbon filled, obtain the iodine value of the activated carbon, the number of blocks or the volume in the reported data to calculate the mass of the activated carbon. In this embodiment, the honeycomb activated carbon with an iodine value of 650mg / kg is about 300g per block and 1m 3 About 300kg. Honeycomb activated carbon with iodine value of 800mg / kg, 1 piece is about 280g, 1m 3 About 280kg.

[0050] Among them, the annual average production time of the auto repair industry is the number of painting operations per year. If available, the data reported by the enterprise shall prevail. If not, the number of painting operations per year of the auto repair industry enterprise shall be calculated as A. 汽修 , the formula is:

[0051]

[0052] Among them, G i is the annual usage data of various VOCs-related materials (paint, including varnish, primer, curing agent, etc.), gc is the average material usage per single painting, and in this embodiment, gc is 2 kg.

[0053] For large auto repair and 4S companies, there are many vehicles to be repaired, many painting operations are performed, and a large amount of organic waste gas and harmful substances are generated. Therefore, the amount of activated carbon used is large, and higher requirements are placed on the continuous working time of activated carbon and the accuracy of calculating the service life of activated carbon. However, in actual operations, large auto repair and 4S companies may handle multiple vehicles at the same time in each batch of painting operations, and the amount of materials used in a single painting operation increases significantly. If the painting operation is performed 330 days per year and an average of 2 batches of painting operations are performed per day, the total number of painting operations per year is 660. If this is used as the upper limit of the auto repair industry, for large auto repair companies and 4S companies, if A 汽修 ≤660, then take the value A 汽修 If A 汽修 >660 times, then A 汽修 =660. However, large auto repair companies and 4S companies also handle vehicle painting separately, that is, the painting batches exceed two times a day. If 660 is used as the upper limit, the data will be inaccurate. In order to improve the accuracy of the calculation of the continuous working time of activated carbon, it is necessary to identify the painting operation situation of large auto repair companies to determine A 汽修 In this embodiment, large-scale auto repair and 4S companies pre-determine the value based on the company's avoidance, social security payment status and other matters.

[0054] In this embodiment, vehicle entry and exit data of the access control systems of large auto repair companies and 4S companies, as well as internal vehicle registration information, are also obtained. The internal vehicle registration information includes trailer license plates, employee vehicle license plates and corresponding employee positions; employee positions include sheet metal technicians, paint technicians, electromechanical technicians, etc.; this type of information can be directly obtained through the data interface and filling in the report, without the need to install additional equipment, lowering the cost and making it easier to promote.

[0055] The system also filters out maintenance vehicle entry and exit data (i.e., vehicles without registered license plates) based on vehicle entry and exit data and internal vehicle registration information. It also filters out towed vehicles (i.e., vehicles that are unable to drive independently and are towed in by a tow truck, with only an exit registration but no entry registration). Based on the towed vehicle's departure time and the tow truck's departure time, it determines whether a tow truck has left the site within a preset time (e.g., two hours) between the towed vehicle's departure time and the tow truck's departure time. If so, the tow truck is marked as a standard maintenance vehicle and associated with the standard maintenance vehicle. If not, the tow truck is marked as a deep maintenance vehicle. Based on the deep maintenance vehicle's departure time, the earliest unassociated tow truck's entry time is used as the deep maintenance vehicle's entry time. Compared to standard scratches and scratches, deep maintenance vehicles typically have a larger painted area and are more likely to be individually painted.

[0056] Also obtain the number of deep maintenance vehicles per unit time. In this embodiment, the unit time refers to 1 month. Determine whether the number of deep maintenance vehicles exceeds the vehicle number threshold (for example, 10 vehicles). If it exceeds the vehicle number threshold, obtain the vehicle entry and exit data of the painter within the corresponding deep maintenance vehicle repair time (that is, the time period between the deep maintenance vehicle entering the site and leaving the site. If there are multiple deep maintenance vehicles, the time can be superimposed). Determine whether there is overtime (that is, leaving the site after the off-duty time. The off-duty time is set according to the actual situation, taking into account the duty situation. In this embodiment, it is 19:00). If there is overtime, record the number of overtimes. Count whether the number of overtimes exceeds the overtime threshold (in this embodiment, it is 1 / 2 of the vehicle number threshold, that is, 5 times). If it exceeds the overtime threshold, it is determined that the vehicle is painted once. If A 汽修 >660 times, value A 汽修 If the overtime threshold is not exceeded, it is judged that multiple vehicles are being painted at the same time. If A 汽修 >660 times, value A 汽修 = 660. By performing secondary verification through overtime, the interference caused by inaccurate identification of deep maintenance vehicles can be reduced.

[0057] The average daily production time of enterprises in the auto repair industry is the average operation time (unit: h / time). If available, the data reported by the enterprise shall prevail. If not, in this embodiment, B 汽修 =4h.

[0058] Read the average annual production time of enterprises in the plastics, rubber production and products industry 橡胶 If available, the data reported by the enterprise shall prevail. If not, the default value in this embodiment is 300 days. In other embodiments, relevant data from external systems such as pollutant discharge permits and environmental protection taxes may also be obtained.

[0059] Read the average daily production time of enterprises in the plastics, rubber production and products industry B 橡胶 If any, the data reported by the enterprise shall prevail; if not, the default value in this embodiment is 10 hours.

[0060] S4. Calculate the continuous working time of activated carbon according to the industry to which it belongs;

[0061] If it is the auto repair industry, the continuous working time t (h) of activated carbon is calculated by the following formula:

[0062]

[0063] Here, α is the ratio of dynamic activity to static activity, and is approximately α=0.8-0.9; in this embodiment, the value is 0.85.

[0064] W is the mass of activated carbon loaded (kg),

[0065] S is the equilibrium retention capacity (%) of the activated carbon. The adsorption capacity of activated carbon is usually expressed as "equilibrium adsorption capacity" and "equilibrium retention capacity." The equilibrium adsorption capacity refers to the maximum amount of gas that an adsorbent can adsorb when polluted air passes through a certain amount of adsorbent at a certain temperature and pressure (25°C, 101.3 kPa), usually expressed as a percentage of the adsorbent's mass. The equilibrium retention capacity refers to the amount of pollutant gas retained in the adsorption layer after a saturated adsorbent passes clean, dry air at the same temperature through the adsorption layer for 6 consecutive hours. When calculating the penetration time of the adsorption layer, for applications with high inlet VOC concentrations and the need to regenerate the activated carbon, such as organic solvent recovery equipment, the adsorption capacity is calculated as the difference between the equilibrium adsorption capacity and the equilibrium retention capacity. For applications with low inlet concentrations and non-regeneration of activated carbon, such as most ventilation, exhaust, or air intake systems, it is required that the adsorbed harmful gases do not precipitate even when the air is clean. The equilibrium retention capacity depends on factors such as the activated carbon's performance, operating conditions (temperature, pressure, flow rate), and the adsorbate. For example, the main components of paint spraying exhaust in the auto repair industry are benzene series (xylene, benzene, toluene, etc.) and organic compounds. Typically, the equilibrium retention value for benzene is 0.23, and the equilibrium retention value for toluene is 0.29. In this example, the equilibrium retention value for activated carbon adsorption in the auto repair industry is 0.25.

[0066] A 汽修 is the number of painting operations per year for the enterprise, B 汽修 The average time for each operation (unit: h / time).

[0067] η is the adsorption efficiency, that is, the removal of VOCs, and in this embodiment, the value is 0.6;

[0068] η0 is the VOCs removal rate of the pretreatment process, which is set according to actual conditions. For example, for filter cotton (including bag dust removal, dry dust removal, wet dust removal, G4, F7 and other dust removal processes), the η0 value is 0; for photocatalytic oxidation, UV photolysis, etc., the η0 value is 0.1; for spraying, the η0 value is 0.1, etc.

[0069] θ is the exhaust gas collection rate. In this embodiment, the paint spraying room adopts positive pressure and is airtight, and θ=0.8.

[0070] G i Annual usage data of various VOCs-related materials (paints, including varnishes, primers, curing agents, etc.);

[0071] β i is the pollution coefficient of the painting operation; in this example, the "VOCs content data" reported by the enterprise is used. The VOCs content of most paints and thinners is 0.45, and the VOCs content of curing agents is 0.35. If the data unit is "g / L", it needs to be converted based on its density. If there is no VOCs content data, the comprehensive pollution coefficient β is used.i =0.445, but it should be noted that the pollution coefficient of water-based paint has decreased significantly. i =0.084~0.1.

[0072] ∑(G i ×β i ) is the total annual VOCs generation from painting operations (unit: kg).

[0073] For the plastics, rubber production and products industry, the continuous working time t (h) of activated carbon can be calculated using the following formula:

[0074]

[0075] The equilibrium retention capacity (S) depends on factors such as the activated carbon's properties, operating conditions (temperature, pressure, flow rate), and the adsorbate. The S for different VOC components varies significantly. For smaller molecular weight components like alkanes and alkenes, the S for activated carbon adsorption is typically less than 20%. In this example, the S value for the activated carbon was 0.15.

[0076] Plastic production usually uses semi-enclosed gas collection hoods (including exhaust cabinets), enclosed gas collection hoods (including soft curtains), top suction gas collection hoods, etc., with a collection rate of 50-60%. In this embodiment, θ=0.5.

[0077] The default value of adsorption efficiency η is 0.21.

[0078] Pollution coefficient β of various plastic products such as injection molding and extrusion of plastics containing VOCs materials i It is 0.054.

[0079] G i Annual usage data of various VOCs-related materials (such as various plastics, resins, foaming agents, rubber, etc.);

[0080] S5. Calculate the service life T of activated carbon in various industries:

[0081]

[0082] For example, in the auto repair industry:

[0083]

[0084] S6. Determine whether the service life of the activated carbon is less than a preset time. If it is less than the preset time, do not make any adjustment. If it is greater than or equal to the preset time, use the preset time as the new service life of the activated carbon.

[0085] For example, the preset time for the auto repair industry is 180 days. Although some companies have less paint spraying operations, activated carbon will actually absorb substances in the environment, causing the activated carbon's adsorption performance to continuously decline. Therefore, in this embodiment, for the auto repair industry where the activated carbon has a service life of more than 180 days, the service life is set to half a year (180 days). The preset time for other industries can be set according to actual conditions.

[0086] This embodiment also provides an activated carbon replacement cycle monitoring system, which uses the above method.

[0087] This solution categorizes activated carbon companies by industry and, incorporating multi-source data such as activated carbon loading, VOCs material usage and content, production frequency, and duration, establishes an industry-specific model for calculating the continuous operating time and lifespan of activated carbon. This allows for dynamic monitoring of activated carbon replacement cycles. Compared to traditional approaches that rely on experience or single-parameter estimation, this solution accurately matches the process characteristics of the auto repair and plastics and rubber industries, fully accounting for key influencing factors such as equilibrium retention, adsorption efficiency, pre-treatment removal rate, and exhaust gas collection rate, significantly improving the accuracy and reliability of activated carbon service life predictions.

[0088] Example 2

[0089] The difference between this embodiment and the first embodiment is that in the method of this embodiment, in S1, the industry information of the activated carbon-related enterprises also includes the automobile and motorcycle and parts manufacturing industry; the automobile and motorcycle and parts manufacturing mainly involves the waste gas treatment of spraying process treatment facilities.

[0090] In S3, the reported data of activated carbon enterprises are pre-processed, including:

[0091] Read the annual production time of the automobile, motorcycle and parts manufacturing industry enterprises. If available, the data reported by the enterprise shall prevail. If not, the default value is 330 days or 300 days. In this embodiment, 330 days is used;

[0092] Read the average daily production time of the enterprise. If available, the data reported by the enterprise shall prevail; if not, the default value in this embodiment is 10 hours.

[0093] In S4, if it is the automobile and motorcycle parts manufacturing industry, the continuous working time t (h) of activated carbon is calculated by the following formula:

[0094]

[0095] Among them, A 汽摩 is the annual production time of enterprises in the automobile and motorcycle parts manufacturing industry, B 汽摩 is the average daily production time of the enterprise, and the other parameters refer to the auto repair industry.

[0096] Example 3

[0097] The difference between this embodiment and the first embodiment is that in the method of this embodiment, in S1, the industry information of the activated carbon-related enterprises also includes the furniture and household products manufacturing industry; the furniture and household products manufacturing industry mainly involves hot pressing, viscose and other process waste gas treatment.

[0098] S3. Pre-process the data reported by activated carbon enterprises, including:

[0099] Read the average annual production time of enterprises in the furniture and home products manufacturing industry 家具 If available, the data reported by the enterprise shall prevail. If not, the default value of this embodiment is 300 days;

[0100] Read the average daily production time of enterprises in the furniture and home products manufacturing industry B 家具 If any, the data reported by the enterprise shall prevail; if not, the default value in this embodiment is 10 hours.

[0101] S4. For furniture and household products manufacturing industry, calculate the continuous working time t (h) of activated carbon using the following formula:

[0102]

[0103] Among them, A 家具 is the annual production time of enterprises in the furniture and home products manufacturing industry, B 家具 The average daily production time for the enterprise.

[0104] The activated carbon adsorption equilibrium value S ranges from 0.1 to 0.15, and is 0.15 in this embodiment, because formaldehyde, acetaldehyde and other aldehydes account for a high proportion in the exhaust gas of plywood, while the activated carbon adsorption equilibrium value of formaldehyde, acetaldehyde and other substances is low.

[0105] In this embodiment, the waste gas collection rate θ is θ=0.9 based on the production mode of a closed negative pressure workshop.

[0106] G i The data are the annual usage data of various VOCs-related materials (such as adhesives (including related solvents)).

[0107] Pollution coefficient β i , in this embodiment, the value is 0.015.

[0108] The above are only embodiments of the present invention. The invention is not limited to the fields involved in this implementation case. Common knowledge such as the known specific structures and characteristics in the scheme is not described in detail here. Ordinary technicians in the relevant field are aware of all common technical knowledge in the technical field to which the invention belongs before the application date or priority date, can obtain all existing technologies in the field, and have the ability to apply conventional experimental means before that date. Ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the inspiration given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several variations and improvements can be made, which should also be regarded as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A method for monitoring activated carbon replacement cycle, characterized in that: include: S1. Classify the industries involved in activated carbon enterprises, including auto repair industry, plastics, rubber production and products industry; S2. Obtain the reported data of activated carbon enterprises; S3. Pre-process the reported data of activated carbon enterprises; S4. Calculate the continuous working time of activated carbon according to the industry to which it belongs; S5. Calculate the service life of activated carbon in various industries based on continuous working time.

2. The activated carbon replacement cycle monitoring method according to claim 1, characterized in that: Also includes: S6. Determine whether the service life of the activated carbon is less than a preset time. If it is greater than or equal to the preset time, use the preset time as the new service life of the activated carbon.

3. The activated carbon replacement cycle monitoring method according to claim 2, characterized in that: In step S2, the reported data include the mass of the activated carbon loaded; the annual usage data of various VOCs-related materials; the VOCs content data; the average annual production time of each enterprise and the average daily production time of each enterprise.

4. The activated carbon replacement cycle monitoring method according to claim 3, characterized in that: In step S3, it is determined whether the enterprise has reported the mass of the activated carbon loaded. If the enterprise has not reported the mass of the activated carbon loaded, the mass of the activated carbon is calculated by obtaining the iodine value, number of blocks or cubic volume of the activated carbon in the reported data.

5. The activated carbon replacement cycle monitoring method according to claim 3, characterized in that: In step S3, the annual average production time of the auto repair industry is the number of painting operations per year. It is determined whether the enterprise has filled in the report. If not, the number of painting operations per year of the auto repair industry enterprise is calculated. 汽修 , the formula is: Among them, G i is the annual usage data of various VOCs-related materials i, and gc is the average material usage per single painting.

6. The activated carbon replacement cycle monitoring method according to claim 5, characterized in that: In step S4, if it is the auto repair industry, the continuous working time t of the activated carbon is calculated by the following formula: Where α is the ratio of dynamic activity to static activity; W is the mass of activated carbon loaded; S is the equilibrium retention amount of activated carbon; B 汽修 is the average time per operation; η is the adsorption efficiency; η0 is the VOCs removal rate of the pretreatment process; θ is the exhaust gas collection rate; β i is the pollution generation coefficient.

7. The activated carbon replacement cycle monitoring method according to claim 6, characterized in that: In the step S4, For the plastics, rubber production and products industry, the continuous working time t of activated carbon can be calculated using the following formula: Among them, A 橡胶 The average annual production time of enterprises in the rubber production and products industry; B 橡胶 The average daily production time for companies in the plastics, rubber manufacturing and products industries.

8. The activated carbon replacement cycle monitoring method according to claim 7, characterized in that: In step S5, the service life T of activated carbon in each industry is calculated:

9. The activated carbon replacement cycle monitoring method according to claim 5, characterized in that: In step S3, it is also determined whether there are multiple vehicles spraying paint at the same time. If it is determined that the vehicle is spraying paint at a single time, if A 汽修 >660 times, value A 汽修 If it is determined that there are multiple vehicles painting at the same time, if A 汽修 >660 times, value A 汽修 =660.

10. An activated carbon replacement cycle monitoring system, characterized in that: Use the method according to any one of claims 1 to 9.

Images