Raw water quality change and dosage model guided production dosing test method

Abstract

The invention discloses a raw water quality change and dosage model guided production dosing test method. The method comprises the following steps: presetting raw water quality parameters related to a productivity test and limiting values of the parameters; obtaining a sampled raw water sample; repeatedly adding chemicals into the raw water sample; monitoring related water quality parameters of the raw water sample after dosing at least twice continuously; and calculating the dosage and judging whether the monitoring value exceeds a preset production raw water quality parameter value or not. The method comprises the following steps: monitoring a water sample after dosing, if a monitoring value exceeds a preset effluent ion concentration value, indicating that the current water quality does not reach the standard, and if the monitoring value is less than or equal to the preset effluent ion concentration value, indicating that the current water quality meets the requirement, and obtaining that the current dosing amount is the minimum dosing amount; by recording the dosage and effluent quality parameters under different raw water quality conditions and constructing a raw water quality change and dosage model, the production cost is reduced while the drug consumption is reduced, the dependency on production personnel is relieved, and the labor calculation intensity is reduced.

Description

Technical Field

[0001] The invention relates to the field of water treatment, and in particular to a production dosing test method guided by a raw water quality change and dosing amount model. Background Art

[0002] With the rapid development of the economy and the improvement of living standards, people have higher and higher requirements for water quality. In order to ensure the safety of water supply quality, staff need to conduct full-process water quality testing and carry out production tests to optimize water production process conditions and avoid water quality safety issues.

[0003] In the prior art, during the operation of the water treatment system for optimizing water use, changes in the quality of raw water in the regulating tank and frequent changes in water production demand have a significant impact on the amount of medicine added. The original operation mode mainly relies on personnel with rich work experience to estimate the change value of the medicine, and then conduct sampling, testing and adjustment. However, the empirical estimate is highly subjective and the accuracy is difficult to guarantee. Different personnel may have different judgments, resulting in large differences in the amount of medicine added. In addition, it is difficult to make accurate estimates when experienced personnel are not on site, and the adjustment process is prone to confusion, which will not only cause a large amount of medicine waste, but may also seriously affect the effluent water quality due to improper medicine addition, and even pollute the water produced in the entire clear water tank, which not only increases the operating cost, but also poses a threat to the safety and sustainable use of water resources. Therefore, there is an urgent need for a more scientific, accurate and stable method of adjusting the amount of medicine added to improve the operating efficiency and water quality assurance capabilities of the water treatment system.

[0004] Therefore, it is necessary to propose a raw water quality change and dosage model to guide the production dosing test method to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a method for guiding production dosing test based on raw water quality change and dosage model, so as to solve the problem that experience estimation is highly subjective and different personnel may have different judgments, resulting in large differences in drug dosage. In addition, improper drug addition will seriously affect the effluent water quality, which not only increases the operating cost, but also poses a threat to the safety and sustainable use of water resources.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A production dosing test method guided by a raw water quality change and dosing amount model, including preset raw water quality parameters related to the production test and parameter limits;

[0008] Obtaining raw water samples;

[0009] Add drugs to raw water samples multiple times;

[0010] Monitor the relevant water quality parameters of the raw water samples after the addition of drugs for at least two consecutive times;

[0011] Calculate the dosage and determine whether the monitored value exceeds the preset production raw water quality parameter value.

[0012] Preferably, the calculation of the dosage and the determination of whether the monitored value exceeds the preset raw water quality parameter value are performed by the following formula:

[0013] At 18℃, K SPMg(OH)2 =1.2×10-11, k sp(CaCO3) =4.8×10-9;

[0014] At 18°C, C(CO32-)≥4.8×10-6mol / L;

[0015] M1=((12.5-8.7)×10-3×2+1.1×10-3+5.4×10-3)×40=0.564g;

[0016] M2=((8.7-1-5.4)×10-3+4.8×10-6)×106=0.245g;

[0017] pH = -1g (H+) ;

[0018] Among them, K SPMg(OH)2 is the solubility product constant of magnesium hydroxide, k sp(CaCO3) is the solubility product constant of calcium carbonate, mol / L is the amount of solute contained in each liter of solution, C(OH-) is the hydroxide ion concentration, C(CO32-) is the carbonate ion concentration, M1 is the amount of sodium hydroxide added to 1L of water, M2 is the amount of sodium carbonate added to 1L of water, pH=-lg[H+] is used to calculate the acidity and alkalinity of the solution, C(CO32-)≥4.8×10-6mol / L means that when Ca2+≤1mmol / L in the water sample, according to the solubility product formula, the carbonate ion concentration should not be less than 4.8×10 -6 mol / L.

[0019] Preferably, the calculation of the dosage and the determination of whether the monitoring value exceeds the preset raw water quality parameter value is as follows: determining whether the magnesium ion, calcium ion, and carbonate in the water sample after the dosage exceed the preset ion concentration monitoring value, wherein the ion concentration range of the effluent water is Mg 2+ ≤40mg / L, Ca 2+ ≤50mg / L, carbonate hardness ≤1mmol / L.

[0020] Preferably, the production dosing test includes at least one of raw water sampling, dosing, flocculation and sedimentation, and ion concentration monitoring, and the water quality parameters include at least one of magnesium ion concentration, calcium ion concentration, and carbonate hardness.

[0021] Preferably, the preset outlet water ion concentration is Mg 2+ ≤40mg / L, Ca 2+ ≤50mg / L, carbonate hardness ≤1mmol / L, the water quality parameters are negatively correlated with the dosage. When the monitored value is greater than the preset outlet water ion concentration value, the dosing operation is continued to reduce the ion concentration. When the monitored value is less than or equal to the preset outlet water ion concentration value, it is concluded that the current dosage is the minimum dosage.

[0022] Preferably, the at least two consecutive monitoring of associated water quality parameters of the raw water sample after drug addition also includes drug treatment of other ions or compounds and pH value in the water sample. Under the condition that the concentration range of each ion when the water is discharged is met, the dosage when other ions or compounds and pH value in the water sample are removed is finally used as the result of the recommended dosage, and the recommended dosage result is the dosage concentration or dosage concentration range.

[0023] Preferably, the calculation process is formulated using Excel tools, the raw water quality is input in the green area, and the effluent standard is input in the gray area, and the dosage per ton of treated water will be automatically output. Fine-tuning the dosage according to this output value can meet the production adjustment requirements.

[0024] Preferably, after obtaining the recommended dosage result, the method further includes displaying the effluent water quality parameters after the dosage and the results of multiple dosages, so as to construct a raw water quality change and dosage model.

[0025] Preferably, a raw water quality parameter module related to the production test is preset for reference to the effluent water quality parameters after the addition of the drug;

[0026] A raw water sample collection module is used to obtain raw water samples to be tested;

[0027] Multiple dosing module, used to add drugs to the water sample to be tested;

[0028] A data monitoring module is used to obtain the water quality parameter monitoring values ​​of the water sample to be tested;

[0029] The data processing module is used to calculate and process relevant water quality parameter data to determine whether the water quality parameters after the drug addition treatment meet the effluent water quality parameters.

[0030] Preferably, the device further comprises:

[0031] Control module, used for parameter preset, dosing control, test management and data recording, etc.;

[0032] Display module, used to display the water quality parameters and recommended dosage results during and after the dosing test;

[0033] The water quality change and dosage model building module is used to comprehensively analyze the test data of the display module to build a water quality change and dosage model for guiding the production operation of dosage.

[0034] Technical effects and advantages of the present invention:

[0035] By recording the dosage and effluent water quality parameters under different raw water quality conditions, a raw water quality change and dosage model is constructed. As the data is accumulated, it is continuously optimized and improved to improve the accuracy of the treatment effect of different water quality changes. When encountering new raw water quality conditions, water treatment can be carried out quickly and effectively to ensure that the effluent water quality is stable and meets the standards. The effluent water quality compliance rate has been increased from the original 60% to 100%, and the extensive mode of drug consumption has been changed to refined mode, which reduces drug consumption while reducing production costs, reduces dependence on professional production personnel, and reduces labor calculation intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A flow chart of a production dosing test method guided by a raw water quality change and dosing dosage model provided in Example 1 of the present invention.

[0037] Figure 2 This is a schematic diagram of a device for a production dosing test method guided by a raw water quality change and dosing dosage model provided in Example 2 of the present invention. DETAILED DESCRIPTION

[0038] 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.

[0039] Example 1

[0040] This embodiment provides a method for guiding the production dosing test based on the raw water quality change and dosing amount model, which is applied to the field of water treatment technology. Figure 1 , the method comprising:

[0041] S1. Preset raw water quality parameters and parameter limits related to production tests.

[0042] S2. Obtain a raw water sample to be tested.

[0043] S3. Add the drug to the raw water sample to be tested multiple times.

[0044] S4. Monitor the relevant water quality parameters of the raw water samples after the addition of drugs at least twice in a row.

[0045] S5. Calculate the dosage and determine whether the monitoring value exceeds the preset raw water quality parameter value. If the monitoring value does not exceed the preset raw water quality parameter value, close the preset production test. If the monitoring value exceeds the preset raw water quality parameter value, start the preset production test and continue to add the drug to the water sample to be tested until the monitoring value meets the effluent water quality requirements and obtain the recommended dosage result.

[0046] The raw water quality change and dosage model provided in this embodiment guides the production dosage test method, and the raw water quality parameter limit clearly defines the water treatment target and the acceptable water quality range. The raw water sample after dosage is monitored for associated water quality parameters at least twice in a row. In order to understand the impact of dosage on water quality in real time, through continuous monitoring, the change trend of water quality parameters over time can be observed. If the monitoring value does not exceed the preset limit, it means that the current dosage is within the acceptable range, or the dosage effect has met the requirements. At this time, the preset production test can be closed to determine that the current dosage is a suitable recommended dosage. If the monitoring value exceeds the preset limit, it indicates that the dosage needs to be adjusted. At this time, the preset production test is started to continue to add the drug to the water sample to be tested, and the process of monitoring and adjusting the dosage is repeated until the monitoring value meets the effluent water quality requirements. This process is continuously fed back and adjusted to eventually find the optimal dosage that can meet the effluent water quality requirements and avoid drug waste.

[0047] The dosage for minimum ion removal is calculated as follows:

[0048] At 18℃, K SPMg(OH)2 =1.2×10-11, k sp(CaCO3) =4.8×10-9;

[0049] At 18°C, C(CO32-)≥4.8×10-6mol / L;

[0050] M1=((12.5-8.7)×10-3×2+1.1×10-3+5.4×10-3)×40=0.564g;

[0051] M2=((8.7-1-5.4)×10-3+4.8×10-6)×106=0.245g;

[0052] pH = -1g (H+) ;

[0053] The calculation of the dosage and the determination of whether the monitoring value exceeds the preset raw water quality parameter value is as follows: determining whether the magnesium ion, calcium ion, and carbonate in the water sample after the dosage exceed the preset ion concentration monitoring value, wherein the ion concentration range of the effluent water is Mg, 2+ ≤40mg / L, Ca 2+ ≤50mg / L, carbonate hardness ≤1mmol / L;

[0054] The preset outlet water ion concentration is Mg 2+ ≤40mg / L, Ca 2+ ≤50mg / L, carbonate hardness ≤1mmol / L, the water quality parameter is negatively correlated with the dosage, when the monitored value is greater than the preset outlet water ion concentration value, continue the dosing operation to reduce the ion concentration, when the monitored value is less than or equal to the preset outlet water ion concentration value, it is concluded that the current dosage is the minimum dosage;

[0055] First, monitor the water sample after dosing to determine the concentration of magnesium ions, calcium ions and carbonates. If the monitored value exceeds the preset effluent ion concentration value, it means that the current water quality does not meet the standard and needs to continue dosing. The purpose of dosing is to reduce the ion concentration by chemical reaction to form precipitation or other forms that are not easy to affect the water quality of magnesium ions and calcium ions in the water. If the monitored value is less than or equal to the preset effluent ion concentration value, it means that the current water quality meets the requirements. At this time, it can be concluded that the current dosage is the minimum dosage. This minimum dosage is to use as little medicine as possible on the premise of meeting the effluent water quality requirements to reduce costs and reduce the impact on the environment. The water quality parameters are negatively correlated with the dosage, which means that as the dosage increases, the ion concentration in the water will decrease, and the water quality parameters will develop in a better direction. On the contrary, if the dosage is reduced, the ion concentration may increase and the water quality may deteriorate. Through a series of calculations and judgments, the dosage is accurately adjusted according to the changes in the ion concentration in the water sample to ensure that the effluent water quality meets the preset requirements.

[0056] Formulate the calculation process with Excel tools, input the raw water quality in the green area and the effluent standard in the gray area, and the dosage per ton of treated water will be automatically output. Fine-tune the dosage according to this output value to meet the production adjustment.

[0057] The monitoring of the associated water quality parameters of the raw water sample after the addition of the drug at least twice continuously also includes adding drugs to other ions or compounds and pH value in the water sample, and under the condition that the concentration range of each ion when the water is discharged is met, the dosage when the other ions or compounds and pH value in the water sample are finally removed is used as the result of the recommended dosage, and the recommended dosage result is the dosage concentration or the dosage concentration range;

[0058] In the monitoring of related water quality parameters of raw water samples after dosing at least twice in a row, not only the main magnesium ions, calcium ions and carbonates are paid attention to, but also other ions or compounds in the water samples and the pH value are treated by dosing. This is because the water quality of raw water is complex. In addition to the preset main ion concentrations that need to be controlled within a specific range, other ions or compounds may also affect the effluent quality. At the same time, pH value is an important indicator for measuring the acidity and alkalinity of water bodies. It will affect the progress of various chemical reactions and the existence form of ions in water.

[0059] After obtaining the recommended dosage result, the step also includes displaying the effluent water quality parameters after the dosage and the results of multiple dosages, so as to construct a raw water quality change and dosage model;

[0060] After obtaining the recommended dosage results, the effluent water quality parameters after dosage and the results of multiple dosages are displayed to construct a raw water quality change and dosage model. The principle of this process is to record the dosage and effluent water quality parameters under different raw water quality conditions to establish a model that can predict and guide the actual water treatment process. With the accumulation of data, this model can be continuously optimized and improved to improve its adaptability to different water quality changes and the accuracy of treatment effects. When encountering new raw water quality conditions, the required dosage can be predicted based on the model, so as to quickly and effectively carry out water treatment and ensure that the effluent quality is stable and meets the standards.

[0061] Example 2

[0062] This embodiment provides a device for guiding the production dosing test method using the raw water quality change and dosing amount model provided in Example 1, which includes:

[0063] A raw water quality parameter module 10 related to the production test is preset for reference with the effluent water quality parameters after the addition of the drug;

[0064] A raw water sample collection module 20 is used to obtain a raw water sample to be tested;

[0065] A multiple dosing module 30 is used to add drugs to the water sample to be tested;

[0066] The data monitoring module 40 is used to obtain the water quality parameter monitoring value of the water sample to be tested;

[0067] The data processing module 50 is used to calculate and process relevant water quality parameter data to determine whether the water quality parameters after the treatment with the drug meet the effluent water quality parameters;

[0068] It also includes a control module 60 for parameter preset, drug addition control, test management, and data recording;

[0069] Display module 70, used to display the water quality parameters and recommended dosage results during and after the dosing test;

[0070] The water quality change and dosage model building module 80 is used to comprehensively analyze the display module test data to build a water quality change and dosage model for guiding the production operation dosage.

[0071] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A method for testing production dosing guided by a raw water quality change and dosing dosage model, characterized in that: include: Preset raw water quality parameters and parameter limits related to production tests; Obtaining raw water samples; Add drugs to raw water samples multiple times; Monitor the relevant water quality parameters of the raw water samples after the addition of drugs for at least two consecutive times; Calculate the dosage and determine whether the monitored value exceeds the preset production raw water quality parameter value.

2. The method for testing production dosing guided by a raw water quality change and dosing dosage model according to claim 1 is characterized in that: The calculation of the dosage and the determination of whether the monitored value exceeds the preset raw water quality parameter value are performed by the following formula: At 18℃, K SPMg(OH)2 =1.2×10-11, At 18°C, C(CO32-)≥4.8×10-6mol / L; M1=((12.5-8.7)×10-3×2+1.1×10-3+5.4×10-3)×40=0.564g; M2=((8.7-1-5.4)×10-3+4.8×10-6)×106=0.245g; pH=-lg (H+) , Among them, K SPMg(OH)2 is the solubility product constant of magnesium hydroxide, is the solubility product constant of calcium carbonate, mol / L is the amount of solute contained in each liter of solution, C(OH-) is the hydroxide ion concentration, C(CO32-) is the carbonate ion concentration, M1 is the amount of sodium hydroxide added to 1L of water, M2 is the amount of sodium carbonate added to 1L of water, pH=-lg[H+] is used to calculate the acidity and alkalinity of the solution, C(CO32-)≥4.8×10-6mol / L means that when Ca2+≤1mmol / L in the water sample, according to the solubility product formula, the carbonate ion concentration should not be less than 4.8×10 -6 mol / L.

3. The method for testing production dosing guided by a raw water quality change and dosing dosage model according to claim 1 is characterized in that: The calculation of the dosage and the determination of whether the monitoring value exceeds the preset raw water quality parameter value is as follows: determining whether the magnesium ion, calcium ion, and carbonate in the water sample after the dosage exceed the preset ion concentration monitoring value, wherein the ion concentration range of the effluent water is Mg, 2+ ≤40mg / L, Ca 2+ ≤50mg / L, carbonate hardness ≤1mmol / L.

4. A method for testing production dosing guided by a raw water quality change and dosing dosage model according to claim 2 or 3, characterized in that: The production dosing test includes at least one of raw water sampling, dosing, flocculation precipitation, and ion concentration monitoring, and the water quality parameters include at least one of magnesium ion concentration, calcium ion concentration, and carbonate hardness.

5. A method for testing production dosing guided by a raw water quality change and dosing dosage model according to claim 2 or 3, characterized in that: The preset outlet water ion concentration is Mg 2+ ≤40mg / L, Ca 2 +≤50mg / L, carbonate hardness≤1mmol / L, the water quality parameters are negatively correlated with the dosage. When the monitored value is greater than the preset outlet water ion concentration value, the dosing operation is continued to reduce the ion concentration. When the monitored value is less than or equal to the preset outlet water ion concentration value, it is concluded that the current dosage is the minimum dosage.

6. The method for testing production dosing guided by a raw water quality change and dosing dosage model according to claim 5 is characterized by: The monitoring of associated water quality parameters of the raw water sample after drug addition at least twice in a row also includes drug addition treatment of other ions or compounds and pH value in the water sample. Under the condition that the concentration range of each ion when the water is discharged is met, the dosage when other ions or compounds and pH value in the water sample are finally removed is used as the result of the recommended dosage. The recommended dosage result is the dosage concentration or dosage concentration range.

7. The method for testing production dosing guided by a raw water quality change and dosing dosage model according to claim 6 is characterized by: Formulate the calculation process using Excel tools, input the raw water quality in the green area and the effluent standard in the gray area, and the dosage per ton of treated water will be automatically output. Fine-tune the dosage according to this output value to meet the adjustment of normal production.

8. The method for testing production dosing guided by a raw water quality change and dosing dosage model according to claim 7 is characterized by: After obtaining the recommended dosage result, the method also includes the step of displaying the effluent water quality parameters after the dosage and the results of multiple dosages, so as to construct a raw water quality change and dosage model.

9. A device for guiding the production dosing test method based on the raw water quality change and dosing dosage model as described in any one of claims 1 to 8, characterized in that: include: The raw water quality parameter module related to the production test is preset to be used as a reference for the effluent water quality parameters after drug addition; A raw water sample collection module is used to obtain raw water samples to be tested; Multiple dosing module, used to add drugs to the water sample to be tested; A data monitoring module is used to obtain the water quality parameter monitoring values ​​of the water sample to be tested; The data processing module is used to calculate and process relevant water quality parameter data to determine whether the water quality parameters after the drug addition treatment meet the effluent water quality parameters.

10. The device according to claim 9, characterized in that The device also includes: Control module, used for parameter preset, dosing control, test management and data recording, etc.; Display module, used to display the water quality parameters and recommended dosage results during and after the dosing test; The water quality change and dosage model building module is used to comprehensively analyze the test data of the display module to build a water quality change and dosage model for guiding the production operation of dosage.

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