Sewage management method and system for digital printing and dyeing

Abstract

The invention provides a sewage management method and system for digital printing and dyeing, and relates to the technical field of sewage management. The method comprises the following specific implementation steps: acquiring first sewage data of sewage at a plurality of sewage discharge ports, calculating the risk degree of pollutants according to different pollutant concentrations, dividing the sewage into a first-stage pollution degree, a second-stage pollution degree and a third-stage pollution degree, and performing corresponding stage treatment according to different pollution degrees; then, the treated sewage is stored in an intermediate storage pool, and a discharge threshold value is obtained in combination with the unit product displacement, the reference displacement and the calibrated discharge threshold value and used for judging whether the treated water meets the discharge standard or not; meanwhile, by comparing the sewage discharge capacity, monitoring whether sewage leakage exists or not, and triggering emergency response when leakage is detected, pollution diffusion is prevented, so that efficient monitoring and treatment of digital printing and dyeing sewage are achieved, the sewage treatment effect and safety are improved, it is ensured that the sewage reaches the standard and is discharged, and environmental pollution is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage management, and in particular to a sewage management method and system for digital printing and dyeing. Background Art

[0002] In recent years, with the rapid development of computer technology, digital printing and dyeing has gradually replaced traditional printing and dyeing and has become an emerging printing and dyeing method in the textile industry. Compared with traditional printing and dyeing methods, digital printing and dyeing can print patterns directly on fabrics, which not only reduces the waste of dyes, but also greatly improves production flexibility and efficiency. However, there are many kinds of dyes and auxiliaries used in the printing and dyeing process. Dyes, chemical auxiliaries, chemicals and fiber debris generated during fabric processing that are not adsorbed or fixed will enter the sewage, posing a potential threat to water bodies and the ecological environment. Therefore, effective sewage management is particularly important in the application of digital printing and dyeing technology. Through advanced sewage treatment technology, the impact of sewage on the environment can be reduced and the sustainable use of water resources can be guaranteed.

[0003] At present, the existing technology often performs the same treatment operation on different types of sewage, ignoring the differences between different pollutants in the sewage, resulting in poor sewage treatment effect and efficiency, making it impossible to effectively remove some difficult-to-degrade printing dyes in the sewage, increasing the risk of environmental pollution.

[0004] In order to solve the above problems, a wastewater management method and system for digital printing and dyeing are proposed. Summary of the invention

[0005] The purpose of the present invention is to provide a sewage management method and system for digital printing and dyeing, which is used to manage the sewage generated in the digital printing and dyeing process. In order to solve the problems existing in the prior art, the present invention first obtains the first sewage data of sewage from several sewage outlets, calculates the danger of pollutants according to different pollutant concentrations, divides the sewage into first-level, second-level and third-level pollution levels, and performs corresponding graded treatment according to different pollution levels; then, the treated sewage will be stored in an intermediate storage tank, and the unit product drainage, the benchmark drainage and the calibrated discharge threshold are combined to obtain the discharge threshold and use it to judge whether the treated water meets the discharge standard; at the same time, by comparing the sewage discharge, monitoring whether there is sewage leakage, and triggering an emergency response when a leak is detected to prevent the spread of pollution, thereby realizing efficient monitoring and treatment of digital printing and dyeing sewage, improving the effect and safety of sewage treatment, ensuring that sewage meets the discharge standard and reducing environmental pollution.

[0006] A wastewater management method for digital printing and dyeing, the specific implementation steps include: Online monitoring equipment is respectively set at the sewage discharge port and the intermediate storage tank of the target textile workshop to collect sewage discharge parameters in real time to obtain the first sewage parameter and the second sewage parameter; Performing data cleaning on the first sewage parameter and the second sewage parameter to obtain first sewage data and second sewage data; According to the first sewage data of all the sewage outlets, first sewage component parameters are obtained to calculate the pollutant hazard level; according to the pollutant hazard levels of different sewage outlets, sewage is divided into first-level pollution level, second-level pollution level and third-level pollution level; sewage of different pollution levels is subjected to graded sewage treatment and input into the intermediate storage tank to obtain treated water; Calculate the unit product discharge volume by using the first sewage data of different sewage discharge outlets; obtain the first benchmark discharge threshold and the second benchmark discharge threshold by combining the unit product benchmark discharge volume, the first calibrated discharge threshold and the second calibrated discharge threshold; obtain the second sewage data of the treated water, and determine whether the treated water meets the discharge standard by combining the reuse threshold, the first benchmark discharge threshold and the second benchmark discharge threshold; According to the first sewage data, the first sewage discharge volume is calculated; the qualified discharge volume and the reuse discharge volume are obtained, and the second sewage discharge volume is obtained by combining the second sewage data and the length of the drainage pipe; the first sewage discharge volume and the second sewage discharge volume are compared to determine whether there is sewage leakage.

[0007] Preferably, the sewage component parameters include pH value, chemical oxygen demand concentration, five-day biochemical oxygen demand concentration, suspended solids concentration, chromaticity, ammonia nitrogen concentration, total nitrogen concentration, total phosphorus concentration, chlorine dioxide concentration, adsorbable organic halogen concentration, sulfide concentration, aniline compound concentration and hexavalent chromium compound concentration; data cleaning of the first sewage parameter and the second sewage parameter includes missing value processing, time alignment and data standardization; the first sewage data includes the first sewage flow and the first sewage component parameter; the second sewage data includes the second sewage capacity and the second sewage component parameter.

[0008] Preferably, the process of obtaining the first sewage component parameter and calculating the pollutant risk level includes: According to the surface water environmental standards, the environmental impact factors of different pollutants are obtained; the pollutant hazard levels of different sewage outlets are obtained by combining the first sewage component parameters, the surface water environmental quality standards and the environmental impact factors.

[0009] Preferably, the process of classifying the sewage into different grades according to the dangerousness of the pollutants at different sewage outlets includes: If the pollutant hazard level is greater than or equal to the first pollution threshold, it means that the sewage is at the first level of pollution; if the pollutant hazard level is less than the first pollution threshold and greater than or equal to the second pollution threshold, it means that the sewage is at the second level of pollution; if the pollutant hazard level is less than the second pollution threshold, it means that the sewage is at the third level of pollution.

[0010] Preferably, sewage with different pollution levels is subjected to graded sewage treatment and input into the intermediate storage tank to obtain the treated water, which comprises: The sewage of the first level of pollution degree is input into a first sewage treatment device, and the sewage is treated by a chemical treatment method to obtain the first level of treated water, and the first level of treated water is stored in a first intermediate storage tank; the second sewage treatment device treats the sewage of the second level of pollution degree according to a biological treatment method to generate the second level of treated water, and the second level of treated water is stored in a second intermediate storage tank; the third sewage treatment device treats the sewage of the third level of pollution degree by a physical treatment method to obtain the third level of treated water, and stores it in a third intermediate storage tank; wherein, the first intermediate storage tank, the second intermediate storage tank and the third intermediate storage tank are the intermediate storage tanks of the first sewage treatment device, the second sewage treatment device and the third sewage treatment device respectively.

[0011] Preferably, the process of calculating the displacement per unit product, combining the baseline displacement per unit product, the first calibrated emission threshold and the second calibrated emission threshold, and obtaining the first baseline emission threshold and the second baseline emission threshold comprises: According to the first sewage data of the sewage discharge outlets corresponding to different products, the first sewage flow rate of different products is obtained; the unit product displacement is obtained in combination with the monitoring time and the product output within the monitoring time; if the unit product displacement is less than or equal to the corresponding unit product benchmark displacement, the first benchmark emission threshold is the first calibrated emission threshold and the second benchmark emission threshold is the second calibrated emission threshold; if there is a unit product displacement greater than the unit product benchmark displacement, the first benchmark emission threshold and the second benchmark emission threshold are obtained by combining the unit product benchmark displacement, the unit product displacement, the product output, the first calibrated emission threshold and the second calibrated emission threshold.

[0012] Preferably, the specific process of obtaining the second sewage data of the treated water and judging whether the treated water meets the discharge standard in combination with the reuse threshold, the first benchmark discharge threshold and the second benchmark discharge threshold includes: According to the second sewage data of the treated water, a second sewage composition parameter is obtained; if the second sewage composition parameter is less than or equal to the reuse threshold, the treated water is input into the reclaimed water reuse system; if the second sewage composition parameter is greater than the reuse threshold and less than or equal to the first benchmark discharge threshold, the treated water is directly discharged to a designated environmental area; if the second sewage composition parameter is greater than the first benchmark discharge threshold and less than or equal to the second benchmark discharge threshold, the treated water is directly discharged to a designated public sewage treatment system; if the second sewage composition parameter is greater than the second benchmark discharge threshold, the pollutant hazard level of the treated water is recalculated and graded treatment is performed.

[0013] Preferably, the specific implementation process of calculating the first sewage discharge volume, combining the qualified discharge volume, the reuse discharge volume, the second sewage data and the length of the drainage pipe to obtain the second sewage discharge volume includes: According to the first sewage data of all the sewage outlets, the first sewage flow is obtained; in combination with the monitoring time, the first sewage discharge volume is calculated; through the length of the drainage pipe and the average flow of the sewage outlet, the pipeline sewage capacity is obtained; in combination with the second sewage data, the standard discharge volume, the reuse discharge volume and the pipeline sewage capacity, the second sewage discharge volume is calculated.

[0014] Preferably, the process of comparing the first sewage discharge volume with the second sewage discharge volume to determine whether there is sewage leakage includes: According to the first sewage discharge volume and the second sewage discharge volume, the discharge volume difference is obtained; if the discharge volume difference is less than or equal to the predetermined discharge volume difference threshold, it indicates that there is no sewage leakage; if the discharge volume difference is greater than the predetermined discharge volume difference threshold, it indicates that there is sewage leakage, the sewage discharge outlet is intercepted, the sewage is stored in the accident emergency pool, and an early warning is issued to the administrator.

[0015] A sewage management system for digital printing and dyeing, comprising: The data acquisition module is configured to respectively set online monitoring equipment at the sewage discharge outlet and the intermediate storage tank of the target textile workshop, collect sewage discharge parameters in real time, and obtain the first sewage parameter and the second sewage parameter; A data preprocessing module performs data cleaning on the first sewage parameter and the second sewage parameter to obtain first sewage data and second sewage data; a graded sewage treatment module, which obtains first sewage component parameters and calculates pollutant risk levels of different pollutants based on the first sewage data of all the sewage discharge outlets; divides sewage into first-level pollution level, second-level pollution level and third-level pollution level according to the pollutant risk levels of different sewage discharge outlets; performs graded sewage treatment on sewage of different pollution levels and inputs the sewage into an intermediate storage tank to obtain treated water; A classification discharge module is provided, which calculates the unit product discharge volume through the first sewage data of different sewage discharge outlets; obtains the first reference discharge threshold and the second reference discharge threshold by combining the unit product benchmark discharge volume, the first calibrated discharge threshold and the second calibrated discharge threshold; obtains the second sewage data of the treated water, and determines whether the treated water meets the discharge standard by combining the reuse threshold, the first reference discharge threshold and the second reference discharge threshold; The abnormal warning module calculates the first sewage discharge volume based on the first sewage data; obtains the standard discharge volume and the reuse discharge volume, and obtains the second sewage discharge volume in combination with the second sewage data and the length of the drainage pipe; compares the first sewage discharge volume with the second sewage discharge volume to determine whether there is a sewage leakage; if there is a sewage leakage, an alarm is issued to the administrator.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The graded sewage treatment proposed in the present invention divides sewage into the first, second and third levels of pollution according to the risk level of pollutants, and adopts different sewage treatment methods respectively, which can carry out targeted treatment on sewage with different pollution levels, improve the sewage treatment effect, and reduce secondary pollution to the environment; at the same time, the treated water of different levels is stored in the corresponding intermediate storage tanks, which effectively realizes the diversion management of sewage and the dynamic regulation of the treatment process, ensures that the sewage that meets the standards after treatment does not need to be treated again, and improves the efficiency of sewage treatment.

[0017] 2. The classified discharge proposed in the present invention can dynamically adjust the sewage discharge standard by combining the unit product discharge volume, the benchmark discharge volume, the first calibrated discharge threshold and the second calibrated discharge threshold, so as to achieve accurate and flexible pollution control. By monitoring the discharge volume of sewage, it can not only ensure that the discharge of pollutants will not exceed the standard when the product discharge volume increases, but also determine the discharge mode according to the water quality of the treated water, thereby reducing the waste of water resources and the risk of excessive discharge of sewage, thereby effectively protecting the ecological environment.

[0018] 3. The sewage leakage warning proposed by the present invention can monitor the difference in the discharge volume in the sewage system in real time by comparing the first sewage discharge volume with the second sewage discharge volume, and promptly determine whether there is a sewage leakage; when the discharge volume difference exceeds a predetermined threshold, the interception operation is automatically performed to direct the sewage into the accident emergency pool, and an early warning notification is issued to the administrator. This method not only effectively improves the safety and reliability of sewage discharge, but also can quickly respond to sudden leakage accidents, reduce the risk of environmental pollution, ensure the continuity and safety of sewage treatment, and further improve the reliability and response efficiency of the sewage management process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A flow chart of a wastewater management method for digital printing and dyeing provided by an embodiment of the present invention; Figure 2 A flow chart of a hierarchical sewage treatment process provided by an embodiment of the present invention; Figure 3 A flow chart of a classified discharge process provided by an embodiment of the present invention; Figure 4 A flow chart of a sewage management system for digital printing and dyeing provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Although digital printing and dyeing can reduce water consumption and dye usage, wastewater discharge during the printing and dyeing process is still an issue that requires continued attention. In particular, toxic and harmful chemicals contained in wastewater, such as dyes, additives, and acid and alkali solutions, may cause serious pollution to the environment if they are discharged as untreated wastewater. To this end, the introduction of efficient wastewater management methods can recycle, treat, and reuse wastewater, reduce the waste of water resources, and reduce the risk of environmental pollution.

[0022] The present invention provides a wastewater management method and system for digital printing and dyeing to manage wastewater generated in the digital printing and dyeing process to prevent wastewater from polluting the environment. In order to illustrate the effectiveness of the method and system of the present invention, a specific description will be given in combination with the accompanying drawings of this embodiment and the following two embodiments.

[0023] Embodiment 1 The present application embodiment discloses a wastewater management method for digital printing and dyeing, so as to efficiently manage the wastewater generated in the digital printing and dyeing process of Class A fabrics, Figure 1 The specific steps of the method proposed in the present invention include: S1. real-time collection of sewage discharge parameters to obtain the first sewage parameter and the second sewage parameter; S2. data cleaning of the first sewage parameter and the second sewage parameter; S3. calculating the pollutant hazard level of different sewage discharge outlets, dividing the sewage into three pollution degree levels, and performing graded sewage treatment; S4. determining the first benchmark emission threshold and the second benchmark emission threshold, and combining the second sewage data and the reuse threshold to determine whether the treated sewage meets the emission standard; S5. calculating the first sewage discharge volume and the second sewage discharge volume, and determining whether there is sewage leakage.

[0024] Furthermore, online monitoring equipment is respectively set at the sewage discharge port and the intermediate storage tank of the Class A fabric textile workshop to collect sewage discharge parameters in real time to obtain the first sewage parameter and the second sewage parameter, corresponding to the above-mentioned step S1; the intermediate storage tank is used to store treated water after sewage treatment.

[0025] Furthermore, data cleaning is performed on the first sewage parameter and the second sewage parameter to obtain first sewage data and second sewage data, corresponding to the above-mentioned step S2; the sewage component parameters include pH value, chemical oxygen demand (COD), five-day biochemical oxygen demand, suspended solids concentration, chromaticity, ammonia nitrogen concentration, total nitrogen concentration, total phosphorus concentration, chlorine dioxide concentration, adsorbable organic halogen concentration, sulfide concentration, aniline compound concentration and hexavalent chromium compound concentration; data cleaning of the first sewage parameter and the second sewage parameter includes missing value processing, time alignment and data standardization; the first sewage data includes first sewage flow and first sewage component parameters; the second sewage data includes second sewage capacity and second sewage component parameters.

[0026] When the embodiment of the present application treats the wastewater from the printing and dyeing process of Class A fabrics, the online monitoring equipment can be used to accurately collect the composition parameters of the wastewater. Through a series of data cleaning operations, the accuracy and consistency of the data can be ensured, so as to more clearly grasp the composition and changing trends of the wastewater, and provide reliable basic data for the subsequent wastewater treatment process. By real-time monitoring of key component parameters of wastewater, such as pH value, chemical oxygen demand concentration, suspended solids concentration, ammonia nitrogen and heavy metal concentration, textile enterprises can promptly discover potential wastewater quality problems, optimize the wastewater treatment process, and effectively improve the quality of treated water. In addition, real-time monitoring of the intermediate storage tank for storing treated water quality can evaluate the effect of wastewater treatment and ensure that the discharge meets the standards, which can not only effectively reduce the risk of harmful substances being discharged, but also improve the efficiency of wastewater treatment and reduce environmental pollution.

[0027] Furthermore, according to the first sewage data of all the sewage outlets, the first sewage component parameters are obtained and the pollutant risk level is calculated, which corresponds to the above step S3; the specific implementation process includes: According to the surface water environmental standard, the environmental impact factors of different pollutants are obtained; the pollutant hazard degree of different sewage outlets is obtained by combining the first sewage component parameters, the surface water environmental quality standard and the environmental impact factors. The calculation formula is expressed as: ; in, Indicates The hazardous degree of the pollutants at each of the sewage outlets; The number of the sewage composition parameters is the number of types of pollutants in the discharged sewage; Indicates the sewage outfall The measured values ​​of the concentration of pollutants; Indicates The environmental standard limits of the pollutants are obtained according to the "Surface Water Environmental Quality Standard (GB 3838-2002)" and the "Textile Dyeing and Finishing Industry Water Pollutant Discharge Standard (GB 4287-2012)"; Indicates The environmental impact factors of the pollutants were obtained by ranking and normalizing the impact degrees of the pollutants according to the pollutant equivalent values ​​in the Technical Guidelines for Environmental Impact Assessment - Surface Water Environment (HJ 2.3—2018).

[0028] In the scenario of managing printing and dyeing wastewater generated by Class A fabrics, by calculating the pollutant hazard level of each sewage discharge outlet of Class A fabric printing and dyeing workshops, efficient classification and treatment of sewage can be achieved, and pollutants with the highest hazard level in sewage can be removed first, such as adsorbable organic halogens, hexavalent chromium and aniline, etc., thereby reducing the impact of sewage discharge on the surface water environment, reducing the entry of toxic and harmful substances into natural water bodies, and improving sewage purification effects.

[0029] The embodiment of the present application calculates the risk of different pollutants based on the first sewage data of all sewage outlets, providing data support for the subsequent accurate treatment of sewage. By combining environmental impact factors, sewage discharge concentrations and national standard limits, it can not only quickly identify high-risk pollutants in sewage, but also ensure that the treatment priorities of different pollutants match their potential harm to the environment, thereby improving the efficiency of subsequent sewage treatment and reducing the risk of environmental pollution.

[0030] Furthermore, the process of classifying the sewage into the first level of pollution, the second level of pollution and the third level of pollution according to the dangerousness of the pollutants at different sewage discharge outlets includes: If the pollutant hazard level is greater than or equal to the first pollution threshold, it means that the sewage is at the first level of pollution; if the pollutant hazard level is less than the first pollution threshold and greater than or equal to the second pollution threshold, it means that the sewage is at the second level of pollution; if the pollutant hazard level is less than the second pollution threshold, it means that the sewage is at the third level of pollution.

[0031] In order to further illustrate the role of the sewage classification treatment proposed by the present invention, the pollutant hazard level and pollution degree level of different sewage outlets in Class A fabric textile workshop are given as an example for comparison. Table 1 lists the pollutant types and measured values ​​of different sewage outlets, and Table 2 lists the pollutant hazard level and pollution degree level of different sewage outlets; wherein, pH value has no unit, indicating a dimensionless value; the unit of chromaticity is times; the units of chemical oxygen demand, five-day biochemical oxygen demand, suspended solids, ammonia nitrogen, total nitrogen, total phosphorus, adsorbable organic halogen, sulfide, aniline and hexavalent chromium are all , indicating the concentration of the corresponding pollutant in the sewage.

[0032] Table 1. Pollutant types and measured values ​​at different sewage outlets in Class A fabric textile workshops

[0033] Table 2. Pollutant hazard levels and pollution levels at different sewage outlets in Class A fabric textile workshops

[0034] According to the data in Table 1 and Table 2, the first level of pollution indicates that the pollutant is more dangerous. The measured values ​​of pollutants with higher environmental impact factors such as adsorbable organic halogens, hexavalent chromium and aniline in the sewage directly determine the pollutant danger level of the sewage. For example, the hexavalent chromium concentration of PF01 reaches , aniline concentrations as high as and adsorbable organic halogens are , which makes the pollutant danger level of the sewage outlet reach , which belongs to the first level of pollution, and toxic and hazardous substances need to be removed first to prevent serious pollution to the environment. The second level of pollution means that the pollutants are of medium risk, that is, the concentrations of pollutants such as chemical oxygen demand, five-day biochemical oxygen demand, ammonia nitrogen, total nitrogen and total phosphorus in the sewage are high; for example, the sewage of PF02 belongs to the second level of pollution, and its chemical oxygen demand is as high as , the total nitrogen concentration reached and total phosphorus concentration was , which may aggravate eutrophication of water bodies and cause a sharp drop in dissolved oxygen. It is necessary to remove such pollutants first to prevent water quality deterioration. The third level of pollution means that the pollutants are less dangerous. Pollutants such as pH value, suspended solids and color are the main components of such sewage. For example, the pH value of PF03 is as high as , the suspended matter concentration reaches and chromaticity reaches times, while the content of other pollutants is low, usually only conventional physical treatment is needed to make the sewage meet the discharge standards.

[0035] The embodiment of the present application can significantly improve the efficiency of sewage classification management and treatment by classifying sewage into first, second and third levels of pollution according to the dangerousness of pollutants at different sewage outlets. This hierarchical management method can adjust the treatment strategy in a targeted manner, so that sewage with high pollution levels is treated first, ensuring that sewage with high pollutant concentrations will not cause serious harm to the environment, thereby reducing the overall pollution load of sewage on the environment.

[0036] Furthermore, sewage with different pollution levels is treated in different levels and input into the intermediate storage tank, see Figure 2 The specific implementation process of obtaining the treated water includes: The sewage of the first level of pollution degree is input into a first sewage treatment device, and the sewage is treated by a chemical treatment method to obtain the first level of treated water, and the first level of treated water is stored in a first intermediate storage tank; the second sewage treatment device treats the sewage of the second level of pollution degree according to a biological treatment method to generate the second level of treated water, and the second level of treated water is stored in a second intermediate storage tank; the third sewage treatment device treats the sewage of the third level of pollution degree by a physical treatment method to obtain the third level of treated water, and stores it in a third intermediate storage tank; wherein, the first intermediate storage tank, the second intermediate storage tank and the third intermediate storage tank are the intermediate storage tanks of the first sewage treatment device, the second sewage treatment device and the third sewage treatment device respectively.

[0037] Specifically, sewage with the first level of pollution can be effectively treated with chemical methods to remove highly toxic and highly concentrated harmful substances, such as heavy metals and adsorbable organic halogens, to ensure that these pollutants do not enter natural water bodies; sewage with the second level of pollution can be better treated with biological methods to remove pollutants such as organic matter and ammonia nitrogen that are less toxic but can easily lead to eutrophication of water bodies; sewage with the third level of pollution can be further treated with physical methods to remove suspended particles and lower the pH value, thereby achieving preliminary purification of water quality.

[0038] The embodiment of the present application can significantly improve the efficiency and accuracy of sewage treatment and the treatment effect of pollutants by treating sewage with different pollution levels in a graded manner. In addition, the treatment process can ensure that different treated waters are independent of each other, avoiding secondary mixing of pollutants, and also facilitate subsequent monitoring and reuse of different treated waters, further reducing pollution to the environment and promoting the sustainable use of circulating water resources.

[0039] Further, the unit product discharge volume is calculated by using the first sewage data of different sewage discharge outlets; the first baseline discharge threshold and the second baseline discharge threshold are obtained by combining the unit product benchmark discharge volume, the first calibrated discharge threshold and the second calibrated discharge threshold, corresponding to Figure 1 The S4 step of the process is as follows: According to the first sewage data of the sewage discharge outlet corresponding to different products, the first sewage flow of different products is obtained; the unit product drainage volume is obtained by combining the monitoring time and the product output within the monitoring time. The specific calculation formula is: ; in, express Unit product displacement of the above mentioned products; express The number of sewage discharge outlets corresponding to the production workshops of such products; Respectively represent the number of samples and the sampling time within the monitoring time, is the monitoring duration; Indicates Sampling time Products in the the first sewage flow rate of a sewage outlet; Indicates the monitoring period Output of products of this category; If the displacement of the unit product is less than or equal to the corresponding unit product benchmark displacement, the first benchmark emission threshold is the first calibrated emission threshold and the second benchmark emission threshold is the second calibrated emission threshold; if the displacement of the unit product is greater than the unit product benchmark displacement, the first benchmark emission threshold and the second benchmark emission threshold are obtained by combining the unit product benchmark displacement, the unit product displacement, the product output, the first calibrated emission threshold and the second calibrated emission threshold, and the calculation formula is expressed as: ; in, represent the first reference emission threshold and the second reference emission threshold respectively; represent the first calibrated emission threshold and the second calibrated emission threshold, respectively; express The benchmark displacement per unit product of the product category; Indicates the number of product categories.

[0040] Specifically, when the unit product discharge volume is greater than the unit product baseline discharge volume, it means that the amount of wastewater generated by the product during the production process has exceeded normal expectations. If the pollutant concentration continues to be controlled according to the original emission standards, the pollutant concentration in each unit of discharge may exceed the standard, thereby causing environmental pollution. Therefore, by adjusting the baseline emission threshold downward, the concentration of pollutants can be more strictly controlled, thereby reducing the negative impact on the environment.

[0041] The embodiment of the present application calculates the unit product drainage volume based on the first sewage data of different sewage discharge outlets, and dynamically adjusts the discharge limit value in combination with the benchmark drainage volume and the calibrated discharge threshold, which can effectively optimize sewage management, reduce resource waste, and improve environmental protection benefits. This method can achieve real-time monitoring and evaluation of the drainage volume of unit products by accurately calculating the sewage flow generated by each type of product during the production process, combined with the production output and monitoring time, and flexibly adjust the sewage discharge standard according to the actual sewage discharge volume, avoiding water resource waste or sewage treatment failure due to production fluctuations.

[0042] Further, the second sewage data of the treated water is obtained, and the reuse threshold, the first reference discharge threshold and the second reference discharge threshold are combined to refer to Figure 3 The specific implementation process of judging whether the treated water meets the discharge standard includes: According to the second sewage data of the treated water, a second sewage composition parameter is obtained; if the second sewage composition parameter is less than or equal to the reuse threshold, the treated water is input into the reclaimed water reuse system; if the second sewage composition parameter is greater than the reuse threshold and less than or equal to the first benchmark discharge threshold, the treated water is directly discharged to a designated environmental area; if the second sewage composition parameter is greater than the first benchmark discharge threshold and less than or equal to the second benchmark discharge threshold, the treated water is directly discharged to a designated public sewage treatment system; if the second sewage composition parameter is greater than the second benchmark discharge threshold, the pollutant hazard level of the treated water is recalculated and graded treatment is performed.

[0043] Specifically, when the water quality reaches the reuse standard, the treated water can directly enter the reclaimed water reuse system, further reducing the consumption of fresh water resources and promoting the recycling of water resources; when the treated water reaches the discharge standard, it will be discharged to the designated environmental area or public sewage treatment system to ensure that the pollutant concentration does not exceed the tolerance of the environment or the treatment system, so as to protect the surface water body and the ecological environment; when the treated water exceeds the discharge standard, the pollutant hazard level of the treated water will be re-evaluated and corresponding graded treatment operations will be taken, so as to recycle the sewage that does not meet the standard to reduce pollution to the environment.

[0044] The embodiment of the present application determines whether the treated water meets the discharge standard by combining the second sewage data of the treated water, the reuse threshold and the benchmark discharge threshold, which can effectively improve the utilization rate of water resources, ensure that the discharged water quality meets the standards, and reduce the negative impact on the environment. This process not only optimizes the recycling of water resources, but also ensures the compliance of sewage discharge through a strict hierarchical management system, further improving environmental benefits and the sustainable development capabilities of enterprises.

[0045] Further, according to the first sewage data, the first sewage discharge volume is calculated; the qualified discharge volume and the reuse discharge volume are obtained, and the second sewage discharge volume is obtained by combining the second sewage data and the length of the drainage pipe, corresponding to Figure 1 The S5 step of the embodiment includes: According to the first sewage data of all the sewage outlets, the first sewage flow is obtained; combined with the monitoring time, the first sewage discharge volume is calculated, and the calculation formula is expressed as: ; in, represents the first sewage discharge volume; Indicates the total number of said sewage outfalls; Respectively represent the number of samples and the sampling time within the monitoring time, is the monitoring duration; Indicates Sampling time the first sewage flow rate of a sewage outlet; The sewage capacity of the pipeline is obtained by the length of the drainage pipeline and the average flow rate of the sewage outlet; the second sewage discharge volume is calculated by combining the second sewage data, the qualified discharge volume, the reuse discharge volume and the sewage capacity of the pipeline, and the specific calculation formula is: ; in, represents the second sewage discharge volume; Respectively represent the reused emission amount and the standard-reaching emission amount; Indicates the length of the drainage pipe; represents the average flow rate of the sewage outfall; Indicates a second sewage capacity of said intermediate storage tank; Indicates the number of the intermediate storage pools.

[0046] In the embodiment of the present application, the first sewage discharge volume provides comprehensive sewage discharge data, which helps to fully grasp the sewage discharge situation and ensure the transparency and controllability of the discharge process; combined with the average flow rate of the sewage discharge port, the pipeline length, the second sewage data, the standard discharge volume and the reuse discharge volume, the sewage discharge volume within the monitoring period is further obtained, and the sewage flow condition in the pipeline is effectively monitored, thereby preventing environmental pollution caused by sewage leakage.

[0047] Furthermore, the process of comparing the first sewage discharge volume with the second sewage discharge volume to determine whether there is sewage leakage includes: According to the first sewage discharge volume and the second sewage discharge volume, the discharge volume difference is obtained; if the discharge volume difference is less than or equal to the predetermined discharge volume difference threshold, it indicates that there is no sewage leakage; if the discharge volume difference is greater than the predetermined discharge volume difference threshold, it indicates that there is sewage leakage, the sewage discharge outlet is intercepted, the sewage is stored in the accident emergency pool, and an early warning is issued to the administrator.

[0048] In the embodiment of the present application, by comparing the first sewage discharge volume with the second sewage discharge volume, the sewage leakage situation can be timely judged, which can effectively improve the safety and response capability of the sewage management system. This processing process ensures that sewage leakage problems can be discovered and controlled in a timely manner, reducing major environmental accidents caused by equipment failure or pipeline rupture; at the same time, timely warnings are issued to administrators, so that relevant personnel can quickly take repair measures to ensure the continuity and safety of the entire sewage treatment process.

[0049] The embodiment of the present application realizes efficient management of sewage in the digital printing and dyeing process through graded sewage treatment, classified discharge and sewage leakage warning. The specific implementation process mainly includes the following steps: (1) Classify sewage into different grades according to the risk level of pollutants, and adopt targeted sewage treatment methods; (2) Classify and discharge treated sewage according to sewage discharge standards; (3) Monitor sewage leakage by comparing sewage discharge volume. The present invention proposes pollutant risk level, dynamic adjustment of emission standards and sewage leakage warning mechanism for the above three processes respectively; the pollutant risk level realizes accurate measurement of sewage pollution degree and improves sewage treatment effect; the dynamic adjustment of emission standards improves the accuracy and flexibility of sewage discharge; the leakage warning mechanism further improves the safety and reliability of sewage management process, ensuring timely response and effective control of sewage leakage in emergency situations.

[0050] Embodiment 2 In Example 1, the method of the present invention effectively manages the wastewater generated during the digital printing and dyeing process of Class A fabrics. In this application example, a wastewater management system for digital printing and dyeing proposed by the present invention is described to achieve the purpose of managing the wastewater generated during the digital printing and dyeing process of Class A fabrics. Comprehensive management of wastewater generated during the printing and dyeing of various types of fabrics, see Figure 4 The sewage management system includes: a data acquisition module, a data preprocessing module, a graded sewage treatment module, a classified discharge module and an abnormal warning module.

[0051] Furthermore, the data acquisition module respectively sets up online monitoring equipment at the sewage discharge port and the intermediate storage tank of the target textile workshop to collect sewage discharge parameters in real time to obtain the first sewage parameter and the second sewage parameter.

[0052] Furthermore, the data preprocessing module performs data cleaning on the first sewage parameter and the second sewage parameter to obtain first sewage data and second sewage data.

[0053] Furthermore, the graded sewage treatment module obtains the first sewage composition parameters based on the first sewage data of all the sewage discharge outlets, and calculates the pollutant hazard levels of different pollutants; divides the sewage into the first level of pollution, the second level of pollution and the third level of pollution according to the pollutant hazard levels of different sewage discharge outlets; performs graded sewage treatment on sewage of different pollution levels, and inputs it into an intermediate storage tank to obtain treated water.

[0054] Further, the classified discharge module calculates the unit product displacement through the first sewage data of different sewage discharge outlets; if the unit product displacement is less than or equal to the corresponding unit product benchmark displacement, the first benchmark discharge threshold is the first calibrated discharge threshold and the second benchmark discharge threshold is the second calibrated discharge threshold; if there is a unit product displacement greater than the unit product benchmark displacement, the first benchmark discharge threshold and the second benchmark discharge threshold are obtained by combining the unit product benchmark displacement, the unit product displacement, the product output, the first calibrated discharge threshold and the second calibrated discharge threshold, and the calculation formula is expressed as: ; in, represent the first reference emission threshold and the second reference emission threshold respectively; represent the first calibrated emission threshold and the second calibrated emission threshold, respectively; Indicates the monitoring period Output of products of this category; express Unit product displacement of the above mentioned products; express The benchmark displacement per unit product of the product category; Indicates the number of product categories, including cotton, linen, silk, etc.; According to the second sewage data of the treated water, a second sewage composition parameter is obtained; if the second sewage composition parameter is less than or equal to the reuse threshold, the treated water is input into the reclaimed water reuse system; if the second sewage composition parameter is greater than the reuse threshold and less than or equal to the first benchmark discharge threshold, the treated water is directly discharged to a designated environmental area; if the second sewage composition parameter is greater than the first benchmark discharge threshold and less than or equal to the second benchmark discharge threshold, the treated water is directly discharged to a designated public sewage treatment system; if the second sewage composition parameter is greater than the second benchmark discharge threshold, the pollutant hazard level of the treated water is recalculated and graded treatment is performed.

[0055] In order to further illustrate the function of the classified discharge module proposed in the present invention, the following example is given for B Textile Factory: The first calibration emission thresholds of the printing and dyeing processes of various types of fabrics are compared. The unit product benchmark discharge volume on different dates is listed in Table 3, and the first calibration emission thresholds under different unit discharge volumes are listed in Table 4; among them, the pH value has no unit, indicating a dimensionless value; the unit of chromaticity is times; the units of chemical oxygen demand, five-day biochemical oxygen demand, suspended solids, ammonia nitrogen, total nitrogen, total phosphorus, adsorbable organic halogens, sulfides, aniline and hexavalent chromium are all .

[0056] Table 3. Textile Factory B on different dates Unit product displacement of each type of fabric (unit: )

[0057] Table 4. Textile Factory B The first benchmark discharge threshold of different types of fabrics under different unit drainage conditions

[0058] According to the data in Table 3 and Table 4, when the unit product discharge exceeds the unit product benchmark discharge, it means that the amount of wastewater generated by the product during the production process has exceeded normal expectations. Therefore, adjusting the first benchmark discharge threshold downward can more strictly control the concentration of pollutants, thereby reducing the negative impact on the environment. For example, the Day2 chemical oxygen demand benchmark discharge threshold was adjusted from the standard 100 to 77.25, and corresponding adjustments were also made to pollutants such as five-day biochemical oxygen demand, suspended solids, chromaticity and ammonia nitrogen, which can effectively suppress the excessive concentration of pollutants caused by the increase in discharge.

[0059] Furthermore, the abnormal warning module calculates the first sewage discharge volume based on the first sewage data; obtains the standard discharge volume and the reuse discharge volume, and obtains the second sewage discharge volume in combination with the second sewage data and the length of the drainage pipe; compares the first sewage discharge volume and the second sewage discharge volume to determine whether there is a sewage leakage; if there is a sewage leakage, an alarm is issued to the administrator.

[0060] The sewage management system proposed in the embodiment of the present application can realize the comprehensive management of the sewage generated by the printing and dyeing process of B Textile Factory through the data acquisition module, data preprocessing module, graded sewage treatment module, classified discharge module and abnormal warning module. The system can not only monitor the water quality of sewage in real time, accurately classify the sewage pollution level and carry out targeted treatment, but also dynamically control the discharge threshold through the discharge volume of sewage to ensure that the discharged water quality meets the standard and improve the utilization efficiency of water resources; at the same time, the abnormal warning module can detect sewage leakage in time and issue an alarm, thereby reducing the risk of environmental pollution and improving the safety and reliability of sewage treatment.

[0061] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wastewater management method for digital printing and dyeing, characterized in that: include: Online monitoring equipment is respectively set at the sewage discharge port and the intermediate storage tank of the target textile workshop to collect sewage discharge parameters in real time to obtain the first sewage parameter and the second sewage parameter; Performing data cleaning on the first sewage parameter and the second sewage parameter to obtain first sewage data and second sewage data; According to the first sewage data of all the sewage outlets, first sewage component parameters are obtained to calculate the pollutant hazard level; according to the pollutant hazard levels of different sewage outlets, sewage is divided into first-level pollution level, second-level pollution level and third-level pollution level; sewage of different pollution levels is subjected to graded sewage treatment and input into the intermediate storage tank to obtain treated water; Calculating the unit product discharge volume through the first sewage data of different sewage discharge outlets; Combining the unit product benchmark discharge volume, the first calibrated discharge threshold and the second calibrated discharge threshold, obtaining the first benchmark discharge threshold and the second benchmark discharge threshold; obtaining the second sewage data of the treated water, combining the reuse threshold, the first benchmark discharge threshold and the second benchmark discharge threshold, to determine whether the treated water meets the discharge standard; According to the first sewage data, the first sewage discharge volume is calculated; the qualified discharge volume and the reuse discharge volume are obtained, and the second sewage discharge volume is obtained by combining the second sewage data and the length of the drainage pipe; the first sewage discharge volume and the second sewage discharge volume are compared to determine whether there is sewage leakage.

2. A method for managing wastewater for digital printing and dyeing according to claim 1, characterized in that: The sewage component parameters include pH value, chemical oxygen demand concentration, five-day biochemical oxygen demand concentration, suspended solids concentration, chromaticity, ammonia nitrogen concentration, total nitrogen concentration, total phosphorus concentration, chlorine dioxide concentration, adsorbable organic halogen concentration, sulfide concentration, aniline compound concentration and hexavalent chromium compound concentration; data cleaning of the first sewage parameter and the second sewage parameter includes missing value processing, time alignment and data standardization; the first sewage data includes the first sewage flow and the first sewage component parameter; The second sewage data includes a second sewage volume and a second sewage component parameter.

3. A wastewater management method for digital printing and dyeing according to claim 1, characterized in that: The process of obtaining the first sewage component parameter and calculating the pollutant risk level includes: According to the surface water environmental standards, the environmental impact factors of different pollutants are obtained; the pollutant hazard levels of different sewage outlets are obtained by combining the first sewage component parameters, the surface water environmental quality standards and the environmental impact factors.

4. A method for managing wastewater for digital printing and dyeing according to claim 1, characterized in that: The process of implementing the classification of sewage into different grades according to the dangerousness of the pollutants at different sewage discharge outlets includes: If the pollutant hazard level is greater than or equal to the first pollution threshold, it means that the sewage is at the first level of pollution; if the pollutant hazard level is less than the first pollution threshold and greater than or equal to the second pollution threshold, it means that the sewage is at the second level of pollution; if the pollutant hazard level is less than the second pollution threshold, it means that the sewage is at the third level of pollution.

5. A method for managing wastewater for digital printing and dyeing according to claim 1, characterized in that: The process of treating sewage with different pollution levels in different levels and inputting them into the intermediate storage tank to obtain the treated water includes: The sewage of the first level of pollution degree is input into a first sewage treatment device, and the sewage is treated by a chemical treatment method to obtain the first level of treated water, and the first level of treated water is stored in a first intermediate storage tank; the second sewage treatment device treats the sewage of the second level of pollution degree according to a biological treatment method to generate the second level of treated water, and the second level of treated water is stored in a second intermediate storage tank; the third sewage treatment device treats the sewage of the third level of pollution degree by a physical treatment method to obtain the third level of treated water, and stores it in a third intermediate storage tank; wherein, the first intermediate storage tank, the second intermediate storage tank and the third intermediate storage tank are the intermediate storage tanks of the first sewage treatment device, the second sewage treatment device and the third sewage treatment device respectively.

6. A method for managing wastewater for digital printing and dyeing according to claim 1, characterized in that: The process of calculating the displacement per unit product, combining the baseline displacement per unit product, the first calibrated emission threshold, and the second calibrated emission threshold to obtain the first baseline emission threshold and the second baseline emission threshold includes: According to the first sewage data of the sewage discharge outlets corresponding to different products, the first sewage flow rate of different products is obtained; the unit product displacement is obtained in combination with the monitoring time and the product output within the monitoring time; if the unit product displacement is less than or equal to the corresponding unit product benchmark displacement, the first benchmark emission threshold is the first calibrated emission threshold and the second benchmark emission threshold is the second calibrated emission threshold; if there is a unit product displacement greater than the unit product benchmark displacement, the first benchmark emission threshold and the second benchmark emission threshold are obtained by combining the unit product benchmark displacement, the unit product displacement, the product output, the first calibrated emission threshold and the second calibrated emission threshold.

7. A method for managing wastewater for digital printing and dyeing according to claim 1, characterized in that: The specific process of obtaining the second sewage data of the treated water and judging whether the treated water meets the discharge standard by combining the reuse threshold, the first reference discharge threshold and the second reference discharge threshold includes: According to the second sewage data of the treated water, a second sewage composition parameter is obtained; if the second sewage composition parameter is less than or equal to the reuse threshold, the treated water is input into the reclaimed water reuse system; if the second sewage composition parameter is greater than the reuse threshold and less than or equal to the first benchmark discharge threshold, the treated water is directly discharged to a designated environmental area; if the second sewage composition parameter is greater than the first benchmark discharge threshold and less than or equal to the second benchmark discharge threshold, the treated water is directly discharged to a designated public sewage treatment system; if the second sewage composition parameter is greater than the second benchmark discharge threshold, the pollutant hazard level of the treated water is recalculated and graded treatment is performed.

8. The method for managing wastewater for digital printing and dyeing according to claim 1, characterized in that: The specific implementation process of calculating the first sewage discharge volume and combining the qualified discharge volume, the reuse discharge volume, the second sewage data and the length of the drainage pipe to obtain the second sewage discharge volume includes: According to the first sewage data of all the sewage outlets, the first sewage flow is obtained; in combination with the monitoring time, the first sewage discharge volume is calculated; through the length of the drainage pipe and the average flow of the sewage outlet, the pipeline sewage capacity is obtained; in combination with the second sewage data, the standard discharge volume, the reuse discharge volume and the pipeline sewage capacity, the second sewage discharge volume is calculated.

9. A method for managing wastewater for digital printing and dyeing according to claim 1, characterized in that: The process of comparing the first sewage discharge volume with the second sewage discharge volume to determine whether there is sewage leakage includes: According to the first sewage discharge volume and the second sewage discharge volume, the discharge volume difference is obtained; if the discharge volume difference is less than or equal to the predetermined discharge volume difference threshold, it indicates that there is no sewage leakage; if the discharge volume difference is greater than the predetermined discharge volume difference threshold, it indicates that there is sewage leakage, the sewage discharge outlet is intercepted, the sewage is stored in the accident emergency pool, and an early warning is issued to the administrator.

10. A wastewater management system for digital printing and dyeing, characterized in that: include: The data acquisition module is configured to respectively set online monitoring devices at the sewage discharge outlet and the intermediate storage tank of the target textile workshop, collect sewage discharge parameters in real time, and obtain the first sewage parameter and the second sewage parameter; A data preprocessing module performs data cleaning on the first sewage parameter and the second sewage parameter to obtain first sewage data and second sewage data; a graded sewage treatment module, which obtains first sewage component parameters and calculates pollutant risk levels of different pollutants based on the first sewage data of all the sewage discharge outlets; divides sewage into first-level pollution level, second-level pollution level and third-level pollution level according to the pollutant risk levels of different sewage discharge outlets; performs graded sewage treatment on sewage of different pollution levels and inputs the sewage into an intermediate storage tank to obtain treated water; A classification discharge module, which calculates the unit product discharge volume through the first sewage data of different sewage discharge outlets; Combining the unit product benchmark discharge volume, the first calibrated discharge threshold and the second calibrated discharge threshold, obtaining the first benchmark discharge threshold and the second benchmark discharge threshold; obtaining the second sewage data of the treated water, combining the reuse threshold, the first benchmark discharge threshold and the second benchmark discharge threshold, to determine whether the treated water meets the discharge standard; The abnormal warning module calculates the first sewage discharge volume based on the first sewage data; obtains the standard discharge volume and the reuse discharge volume, and obtains the second sewage discharge volume in combination with the second sewage data and the length of the drainage pipe; compares the first sewage discharge volume with the second sewage discharge volume to determine whether there is a sewage leakage; if there is a sewage leakage, an alarm is issued to the administrator.

Images