Method and device for controlling dosage of Fenton reaction reagent

Abstract

The present invention relates to the field of sewage treatment technology, and more particularly to a method and device for controlling the dosage of a Fenton reaction reagent. In the embodiment of the present invention, the control device can monitor the current Fe 2+ Residual, current DO and current ORP, thus based on the current Fe 2+ Calculate the expected value of the current H2O2 dosage and Fe based on the residual amount, current DO and current ORP 2+ The current expected value of the dosage is used to control the H2O2 metering pump to add H2O2 and the Fe 2+ The current expected value of the dosage controls Fe 2+ Metering pump to add Fe 2+ The controller calculates the current expected value of H2O2 dosage and Fe based on multiple water quality reaction parameters. 2+ The current dosage expectation is more accurate, achieving H2O2 and Fe 2+ precise delivery.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of sewage treatment, and in particular to a method and device for controlling the dosage of a Fenton reaction reagent. Background Art

[0002] Industrial development leads to the release of large quantities of toxic substances into the environment, causing water pollution. These harmful substances include antibiotics, endocrine disruptors, pesticides, and halogenated organic compounds. These pollutants contain multiple toxic and pathogenic functional groups and have demonstrated global genotoxicity, posing a serious threat to the ecological environment and human health.

[0003] As an effective advanced oxidation process, Fenton oxidation is widely used in deep treatment of various difficult-to-degrade industrial wastewaters due to its simple equipment, strong oxidation capacity and high treatment efficiency. The reason why Fenton reagent has a very strong oxidation capacity is mainly because Fe 2+ It reacts with H2O2 under acidic conditions to produce a large number of hydroxyl radicals with strong oxidizing ability. 2+ The dosage of H2O2 has a great influence on the deep treatment effect of difficult-to-degrade industrial wastewater. In the existing sewage treatment process, the control accuracy of the dosage of Fenton reaction reagent is not high enough, which affects the sewage treatment effect. Summary of the Invention

[0004] In order to improve the control accuracy of the dosage of Fenton reaction reagents, the embodiment of the present application provides a method and device for controlling the dosage of Fenton reaction reagents, which can be based on the current Fe 2+ Calculate the expected value of the current H2O2 dosage and Fe based on the residual amount, current DO and current ORP 2+ The current dosage expectation value increases H2O2 and Fe 2+ The control accuracy of dosage.

[0005] In order to solve the above technical problems, the embodiments of the present invention provide the following technical solutions:

[0006] In the first aspect of the present application, a method for controlling the dosage of a Fenton reaction reagent is provided, which is applied to a device for controlling the dosage of a Fenton reagent, wherein the device comprises a H2O2 metering pump and a Fe 2+ The metering pump is used to control the amount of H2O2 added to the acid solution mixing tank. 2+ The metering pump is used to control the Fe 2+ The acid solution blending tank and the Fenton reactor are sequentially arranged along the direction of sewage transportation; the method comprises: monitoring the current water quality reaction parameters of the Fenton reaction zone, the current water quality reaction parameters including the current Fe 2+Residual amount, current DO and current ORP; calculate the current H2O2 dosage expectation and Fe based on the current water quality reaction parameters 2+ The current dosage expected value; based on the current H2O2 dosage expected value control H2O2 metering pump to add H2O2; based on the Fe 2+ The current expected value of the dosage controls Fe 2+ Metering pump to add Fe 2+ .

[0007] In the embodiment of the present application, the control device can monitor the current Fe 2+ Residual, current DO and current ORP, thus based on the current Fe 2+ Calculate the expected value of the current H2O2 dosage and Fe based on the residual amount, current DO and current ORP 2+ The current expected value of the dosage is used to control the H2O2 metering pump to add H2O2 and the Fe 2+ The current expected value of the dosage controls Fe 2+ Metering pump to add Fe 2+ The controller calculates the current expected value of H2O2 dosage and Fe based on multiple water quality reaction parameters. 2+ The current dosage expectation is more accurate, achieving H2O2 and Fe 2+ precise delivery.

[0008] In some embodiments, the current expected value of H2O2 dosage and Fe 2 + The current dosage expected value includes: obtaining a dosage mathematical model of the Fenton reagent; calculating the current COD of the Fenton reaction zone based on the current water quality reaction parameters and the dosage mathematical model; calculating the current dosage expected value of H2O2 and Fe based on the current COD of the Fenton reaction zone 2+ The current expected value of the dosage; wherein the dosage mathematical model is as follows:

[0009]

[0010] In the dosage mathematical model, f(x1, x2, x3) is the current COD of the Fenton reaction zone, x1, x2 and x3 are the current Fe 2+ The residual amount, the current DO of the Fenton reaction zone and the current ORP of the Fenton reaction zone, α1, α2, α3 and γ are simulation parameters; m1, m2 and m3 are parameter influence multiples, and β is a constant.

[0011] In some embodiments, the method further comprises: obtaining the Cl of the sewage in the inlet pool. - concentration, residual chlorine concentration, inlet alkalinity, water temperature and HCO3 - concentration and H2PO4 - Concentration; Based on the Cl - concentration, residual chlorine concentration, inlet alkalinity, water temperature and HCO3 - concentration and H2PO4 - The concentration determines the size of the constant β; wherein the water inlet tank and the acid solution mixing tank are arranged in sequence along the conveying direction of the sewage.

[0012] In some embodiments, the amount of H2O2 added and Fe2O2 added are calculated based on the current COD. 2+ The dosage includes: if the current COD is outside the preset COD range, or the current Fe 2+ If the residual amount is outside the preset residual amount range, the current H2O2 dosage expectation value and Fe 2+ The current expected value of the dosage.

[0013] In some embodiments, the amount of H2O2 added and Fe2O2 added are calculated based on the current COD. 2+ The dosage also includes: if the current COD is within the preset COD range, and the current Fe 2+ If the residual amount is within the preset residual amount range, the H2O2 metering pump is controlled to add H2O2 based on the expected value of the initial H2O2 dosage, and the Fe 2+ The initial dosage expectation value controls Fe 2+ Metering pump to add Fe 2+ .

[0014] In some embodiments, the current COD is used to calculate the current H2O2 dosage and the expected value of Fe 2+ The current dosage expected value includes: calculating the current dosage expected value of H2O2 based on the current COD, according to the mass concentration meter, the ratio of the current dosage expected value of H2O2 to the current COD is 1:1; calculating the Fe based on the current dosage expected value of H2O2 2+ The current dosage expectation value, in terms of molar concentration, is 2+ The ratio of the current expected value of the dosage to the current expected value of the H2O2 dosage is 1:1 to 1:3.

[0015] In some embodiments, monitoring the current water quality reaction parameters of the Fenton reaction zone includes: determining the expected value of the initial H2O2 dosage and the Fe 2+Based on the initial expected value of the amount of H2O2 dosage control H2O2 metering pump to add H2O2, and, based on the Fe 2+ The initial dosage expectation value controls Fe 2+ Metering pump to add Fe 2+ Based on the H2O2 initial dosage desired value control H2O2 metering pump to add H2O2, and, based on the Fe 2+ The initial dosage expectation value controls Fe 2+ Metering pump to add Fe 2+ Afterwards, the current water quality reaction parameters of the Fenton reaction zone are monitored.

[0016] In some embodiments, the determination of the initial dosage of H2O2 and Fe 2+ The initial dosage includes: obtaining the initial water quality reaction parameters of the sewage in the water inlet pool; determining the initial COD value of the sewage in the water inlet pool based on the initial water quality reaction parameters; determining the initial dosage expectation value of H2O2 and Fe based on the initial COD value; 2+ The expected initial dosage.

[0017] In the second aspect of the present application, a device for controlling the dosage of a Fenton reaction reagent is provided, the device comprising: Fe 2+ Residual amount detector, the Fe 2+ The residual detector is used to monitor the Fe content in the Fenton reaction zone of the Fenton reactor. 2+ Residual amount; a first DO detector, the first DO detector is used to monitor the DO of the Fenton reaction zone; a first ORP detector, the first ORP detector is used to monitor the ORP of the Fenton reaction zone; Fe 2+ Metering pump, the Fe 2+ The metering pump is used to control the Fe 2+ H2O2 metering pump, the H2O2 metering pump is used to control the amount of hydrogen peroxide added during the control Fenton reaction; at least one processor; and a memory connected to the at least one processor; wherein the Fe 2+ Residual meter, first DO meter, first ORP meter, Fe 2+ The metering pump and the H2O2 metering pump are communicatively connected to the at least one processor; the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the method described in the first aspect.

[0018] It should be understood that the contents described in the Summary of the Invention are not intended to define the key or important features of the present disclosure, nor are they intended to limit the scope of the present disclosure. Other features of the present disclosure will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0020] Figure 1 This is a schematic diagram of an application scenario of the method for controlling the dosage of Fenton reagent provided in some embodiments of the present application;

[0021] Figure 2 is a schematic structural diagram of a device for controlling the dosage of a Fenton reagent provided in some embodiments of the present application;

[0022] Figure 3 1 is a flow chart of a method for controlling the dosage of Fenton reagent provided in some embodiments of the present application;

[0023] Figure 4 This is a schematic diagram of the hardware structure of the controller provided in some embodiments of the present application. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0025] It should be noted that, unless there is a conflict, the various features of the embodiments of the present invention may be combined with each other and are all within the scope of protection of the present invention. In addition, although the functional modules are divided in the device schematics and the logical order is shown in the flowcharts, in some cases, the steps shown or described may be performed in a different order than the module division in the device schematics or the order in the flowcharts.

[0026] Unless otherwise defined, all technical and scientific terms used in this specification have the same meanings as those commonly understood by those skilled in the art to which this invention belongs. The terms used in this specification and in the description of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the relevant listed items.

[0027] In order to treat the refractory pollutants in sewage, the Fenton advanced oxidation technology is often used in the process to add H2O2 and Fe 2+ / iron-based catalyst to form an oxidation system and produce hydroxyl radicals (·OH), thereby utilizing the strong oxidizing property of ·OH to degrade the refractory organic matter in the wastewater. The traditional homogeneous Fenton process has problems such as large reagent consumption, high energy consumption and secondary pollution; the heterogeneous Fenton process has problems such as low catalyst catalytic efficiency, easy deactivation and poor stability. In practical applications, the above two forms of Fenton technology have the following characteristics: (1) The dosing is relatively extensive, and the reagent waste is serious, resulting in high operating costs; (2) The dosing amount adjustment relies on manual experience. When facing water quality fluctuations, it is often difficult to adjust the dosing amount in time, resulting in the breakdown of the Fenton process and affecting the effluent discharge standard. (3) Chemical oxygen demand (COD) is a comprehensive indicator. There are often many substances in refractory wastewater that are difficult to be oxidized by potassium dichromate / potassium permanganate. These refractory substances do not contribute to the COD value, but seriously affect the stable operation of the process and the effluent standard. Judging the dosage of Fenton process solely by the COD value of the influent has limitations. Therefore, it is urgent to develop a Fenton intelligent dosing system and equipment based on multi-parameter control to achieve optimized control of Fenton dosing, reduce operating costs, and reduce the risk of Fenton process breakdown when the water quality is complex and fluctuates greatly.

[0028] Based on this, the embodiment of the present application provides a method and device for controlling the dosage of Fenton reaction reagents, which can be based on the Fe 2+ The dosage of Fenton reagent is controlled by detection parameters such as residual amount, dissolved oxygen (DO) and oxidation-reduction potential (ORP), thereby improving the control accuracy of the dosage of Fenton reaction reagent.

[0029] For example, Figure 1 The application scenarios of this application are presented, such as Figure 1 As shown, the application scenario includes an inlet pool 10, an inlet pump 20, an acid solution mixing pool 30 and a Fenton reactor 40 which are sequentially arranged along the sewage transportation direction.

[0030] The water inlet pool 10 is used to store sewage to be treated. A DO detector 11, an ORP detector 12 and a COD detector 13 are provided at the water inlet pool 10. The DO detector 11, the ORP detector 12 and the COD detector 13 are used to detect the DO, ORP and COD of the sewage in the water inlet pool respectively.

[0031] The inlet pump 20 is connected to the inlet tank 10 and the acid preparation tank 30 by a pipeline. The inlet pump 20 is used to control the amount of wastewater entering the acid preparation tank 20 from the inlet tank 10. The inlet pump 20 can control the amount of wastewater entering the Fenton reaction zone, adjust the residence time of the wastewater in the Fenton reaction zone, and adjust the operation mode of the wastewater in the Fenton reaction zone (continuous or intermittent operation).

[0032] The acid solution mixing tank 30 is used to accommodate sewage input from the water inlet tank, providing the acid environment required for the Fenton reaction. A H2O2 metering pump 31 and an acid solution metering pump 32 are respectively connected to the acid solution mixing tank 30 pipeline. The H2O2 metering pump 31 is used to add hydrogen peroxide (H2O2) to the acid solution mixing tank, and the acid solution metering pump 32 is used to add acid to the acid solution mixing tank. The acid solution mixing tank 30 is also provided with a pH meter 33, which is used to detect the pH value of the sewage in the acid solution mixing tank.

[0033] The Fenton reactor 40 is connected to the acid solution mixing tank 30 by pipeline, and is used to receive the sewage input from the acid solution mixing tank and perform Fenton treatment on the sewage. The Fenton reactor 40 is equipped with a pH meter 41, an ORP meter 42, a DO meter 43 and a Fe 2+ Residual amount detector 44, PH detector 41, ORP detector 42, DO detector 43 and Fe 2+ The residual detector 44 is used to monitor the pH, DO, OR and Fe in the Fenton reactor 40. 2+ Residual amount.

[0034] Specifically, the Fenton reactor 40 includes a Fenton reaction zone, an alkali solution preparation zone, and a precipitation zone arranged in sequence along the sewage transportation direction. The alkali solution preparation zone is used to neutralize the water after the Fenton reaction. 2+ The metering pump 44 is connected to the Fenton reaction zone pipeline and is used to add ferrous sulfate and other Fe-containing substances to the Fenton reaction zone. 2+ The Fenton reaction zone is equipped with a DO detector, an ORP detector and a Fe 2+ Residual meter 43, DO meter, ORP meter and Fe 2+ The residual detector 43 is used to monitor the DO, ORP and Fe of the wastewater in the Fenton reaction zone. 2+ Residual amount. The alkali solution preparation area is provided with a pH meter 41, and the pH meter 41 is specifically used to detect the pH of the alkali solution preparation area. The alkali solution metering pump 44 is connected to the alkali solution preparation area pipeline and is used to add alkali solution to the alkali solution preparation area. In some embodiments, the sedimentation area is also provided with a COD meter, which is used to detect the COD of the Fenton-treated wastewater discharged from the Fenton reactor 40.

[0035] The present application also provides a device for controlling the dosage of Fenton reaction reagents. Figure 1 and Figure 2 The device 200 includes: a controller 50 and an ORP detector 42 (also known as a first ORP detector), a DO detector 43 (also known as a first DO detector), and a Fe 2+ Residual amount detector 44, H2O2 metering pump 31 and Fe 2+ Metering pump 44. Controller 50 is used to obtain ORP detector 42, DO detector 43, Fe 2+ The residual detector 44 detects the ORP, DO and Fe in the Fenton reaction zone of the Fenton reactor 40. 2+ Residual amount, based on ORP, DO and Fe in the Fenton reaction zone 2+ The amount of H2O2 added and Fe 2+ The ORP detector 42 and the DO detector 43 detect the ORP and DO of the Fenton reaction zone respectively according to the preset detection frequency (such as 1-2 times / h). 2+ The residual detector 44 is used to detect the Fe content of the Fenton reaction effluent according to the preset detection frequency. 2+ Residual amount.

[0036] In some embodiments, the device 200 further includes a DO meter 11 (also known as a second DO meter), an ORP meter 13, and a COD meter 13, which are communicatively connected to the controller 50. In other embodiments, the device 200 further includes a pH meter 33 and a pH meter 41, which are communicatively connected to the controller 50. Specifically, the pH meter 33 is used to monitor the pH value of the wastewater in the acid-base mixing tank 30 in real time, and the pH meter 33 is used to monitor the pH value of the wastewater in the Fenton reaction zone of the Fenton reaction tank 30 in real time.

[0037] In some embodiments, the device 200 further includes a water inlet pump 20 in communication with the controller 50 , and the controller 50 is configured to control the water inlet volume of the water inlet pump 20 .

[0038] In some embodiments, the device 200 further includes a human-computer interaction interface, and the device 200 receives user operations through the human-computer interaction interface. For example, the controller can receive user input operations through the human-computer interaction interface to obtain the Cl of the sewage in the water inlet pool. - concentration, residual chlorine concentration, inlet alkalinity, water temperature and HCO3 - concentration and H2PO4 - concentration.

[0039] The present invention provides a method for controlling the dosage of a Fenton reaction reagent, which is applied to a device for controlling the dosage of a Fenton reaction reagent, for example, Figure 2The device 200, such as Figure 3 The method shown comprises the following steps:

[0040] Step 31: monitor the current water quality reaction parameters of the Fenton reaction zone, wherein the current water quality reaction parameters include the current Fe 2+ Residual volume, current DO and current ORP;

[0041] Specifically, in this embodiment, the controller can detect the frequency of the budget (such as 1-2 times / day, etc.) through Fe 2+ The residual detector, the first DO detector and the first ORP detector respectively measure the current Fe 2+ The residual amount, current DO and current ORP are tested.

[0042] In the Fenton reaction process, most of the Fe 2+ Will react to form Fe 3+ , only a small amount of residual Fe 2+ Loss, Fe 2+ The residual amount can reflect whether the dosage of the Fenton reaction is reasonable and whether the reagent is fully utilized. 2+ The residual amount is monitored by online equipment. 2+ The unit of residual amount is mg / L, and the setting range includes three ranges: 0-5mg / L, 5mg / L-10mg / L and greater than 10mg / L. The controller can control Fe by adjusting the acidity. 2+ The ratio of the dosage to the H2O2 dosage and the residence time of the wastewater in the Fenton reaction zone control the Fe 2+ Residual amount.

[0043] In the case of continuous water inflow, the Fenton reaction is an oxygen-consuming process, and when Fe 2+ When the concentration is too high, H2O2 will decompose ineffectively, releasing O2, and the DO value will rise. Therefore, by detecting the DO data in the Fenton reaction zone, the stage of the Fenton reaction can be indirectly reflected, and the range of the DO value reflects the status of the Fenton reaction.

[0044] The redox potential of the Fenton reaction zone, Fe 2+ The residual amount and DO can reflect the actual reaction conditions in the wastewater (such as COD), effectively solving the problem that the COD value of refractory organic matter in the Fenton reaction is difficult to detect.

[0045] Step 32: Calculate the current expected value of H2O2 dosage and Fe based on the current water quality reaction parameters. 2+ Current expected dosage;

[0046] In some embodiments, the controller can obtain a mathematical model of the dosage of the Fenton reagent; calculate the current COD of the Fenton reaction zone based on the current water quality reaction parameters and the mathematical model of the dosage; calculate the current expected value of the H2O2 dosage and the Fe based on the current COD of the Fenton reaction zone. 2+ The current expected value of the dosage. The dosage mathematical model is as follows:

[0047]

[0048] In the dosage mathematical model, f(x1, x2, x3) is the current COD of the Fenton reaction zone, x1, x2 and x3 are the current Fe 2+ The residual amount, the current DO of the Fenton reaction zone and the current ORP of the Fenton reaction zone, α1, α2, α3 and γ are simulation parameters; m1, m2 and m3 are parameter influence multiples, and β is a constant.

[0049] In the above example, β is the Cl of the sewage in the influent tank. - concentration, residual chlorine concentration, inlet alkalinity, water temperature and HCO3 - concentration and H2PO4 - Concentration-related parameters. The controller can obtain the Cl input by the user through the human-computer interaction interface - concentration, residual chlorine concentration, inlet alkalinity, water temperature and HCO3 - concentration and H2PO4 - concentration, and based on Cl - concentration, residual chlorine concentration, inlet alkalinity, water temperature and HCO3 - concentration and H2PO4 - The concentration determines the magnitude of the constant β.

[0050] Specifically, Cl - , residual chlorine, HCO3- and H2PO4- plasma have a greater impact on the Fenton reaction, among which Cl - 、HCO3 - and residual chlorine concentration affect the amount of OH produced in the oxidation system, H2PO4 - Can be combined with Fe 2+ Combination consumes reagents, which increases invalid reactions. Therefore, it is necessary to control it within an appropriate concentration range. If it exceeds a reasonable range, it is necessary to determine the impact on the Fenton effect, and perform Fenton reaction influence relationship parameter correction, or adopt other technical means to remove interfering ions.

[0051] In some embodiments, Cl - Concentration is less than 2000mg / L, residual chlorine concentration is less than 10mg / L, HCO3 - Concentration less than 15g / L, H2PO4- A concentration less than 20 mg / L and a water temperature between 25°C and 35°C are considered to have no effect on the Fenton reaction. Conditions greater than the above parameters will affect the Fenton removal effect. It is necessary to set an alarm for exceeding the standard, conduct small-scale experiments to correct the influencing parameters, and calibrate the model algorithm.

[0052] In some embodiments, after the controller calculates the current COD of the Fenton reaction zone, if the controller determines that the current COD is outside the preset COD range, or the current Fe 2+ If the residual amount is outside the preset residual amount range, the current H2O2 dosage expectation value and Fe 2+ The current dosage expected value. If it is determined that the current COD is within the preset COD range, and the current Fe 2+ If the residual amount is within the preset residual amount range, the controller does not need to adjust H2O2 and Fe 2+ The controller continues to control the H2O2 metering pump to add H2O2 based on the current dosage, and based on the expected value of the initial H2O2 dosage, the controller continues to control the H2O2 metering pump to add H2O2 based on the expected value of the initial H2O2 dosage, and based on the Fe 2+ The initial dosage expectation value controls Fe 2+ Metering pump to add Fe 2+ At this time, the controller does not need to calculate the current expected value of H2O2 dosage and Fe 2+ The current expected value of the dosage.

[0053] In some embodiments, the current COD is used to calculate the current H2O2 dosage and the expected value of Fe 2+ The specific steps of the current expected value of the dosage include: the controller calculates the current expected value of the dosage of H2O2 based on the current COD, so that according to the mass concentration meter, the ratio of the current expected value of the dosage of H2O2 to the current COD is 1:1; and the controller calculates the Fe based on the current expected value of the dosage of H2O2. 2+ The current dosage is expected to be the same as the molar concentration of Fe 2+ The ratio of the current expected value of the dosage to the current expected value of the H2O2 dosage is 1:1 to 1:3.

[0054] In some embodiments, step 32 specifically includes the following steps: determining the initial H2O2 dosage and the Fe 2+ Based on the initial expected value of the amount of H2O2 dosage control H2O2 metering pump to add H2O2, and, based on the Fe 2+ The initial dosage expectation value controls Fe 2+ Metering pump to add Fe 2+Based on the H2O2 initial dosage desired value control H2O2 metering pump to add H2O2, and, based on the Fe 2+ The initial dosage expectation value controls Fe 2+ Metering pump to add Fe 2+ Afterwards, the current water quality reaction parameters of the Fenton reaction zone are monitored.

[0055] Specifically, the controller determines the initial dosage of H2O2 and Fe 2+ The method for determining the initial dosage is as follows: the controller obtains the initial water quality reaction parameters of the sewage in the inlet pool; the initial COD value of the sewage in the inlet pool is determined based on the initial water quality reaction parameters; the initial dosage expectation value of H2O2 and Fe is determined based on the initial COD value. 2+ The controller can specifically calculate the initial COD value of the sewage in the inlet pool based on the initial water quality reaction parameters of the sewage in the inlet pool and the dosage mathematical model, and calculate the initial H2O2 dosage expectation value based on the initial COD, so that according to the mass concentration meter, the ratio of the initial H2O2 dosage expectation value to the initial COD is 1:1; then, the controller calculates the Fe based on the initial H2O2 dosage expectation value. 2+ The initial dosage expectation value, according to the molar concentration, is 2+ The ratio of the expected initial dosage to the expected initial dosage of H2O2 is 1:1 to 1:3.

[0056] Step 33: controlling the H2O2 metering pump to add H2O2 based on the current expected value of the H2O2 dosage; and

[0057] Step 34, based on the Fe 2+ The current expected value of the dosage controls Fe 2+ Metering pump to add Fe 2+ .

[0058] In this embodiment, the H2O2 metering pump can be controlled to add H2O2 to the acidity adjustment tank based on the current expected value of H2O2 dosage; 2+ The current expected value of the dosage controls Fe 2+ The metering pump adds Fe to the Fenton reaction zone 2+ .

[0059] Several embodiments of the present application are provided below.

[0060] Example 1

[0061] The pyridine pesticide industrial wastewater from a certain industrial park contains a large amount of difficult-to-degrade organic matter. Testing revealed a COD value of only about 10 mg / L when the concentration of such organic matter was 200 mg / L. Therefore, it is difficult to use the Fenton system as a pre-treatment to determine degradation status based on COD removal rate. Conventional dosing methods are not suitable for this type of wastewater. When the Fenton reaction reagent dosing device of the present embodiment was applied to this type of wastewater, the monitoring indicators were as follows:

[0062]

[0063]

[0064] In this embodiment, the Fenton reaction reagent dosing device was operated continuously for three months according to the Fenton reaction reagent dosing control method, and the following results were obtained:

[0065] (1) Inlet pool Cl - The relationship between the concentration and COD of the water discharged after Fenton treatment is as follows: When the Cl in the water tank is - When the concentration is not more than 2000mg / L, the COD of the water discharged after Fenton treatment is the best, which is 45%-50%. - When the concentration is greater than 2000 mg / L and less than or equal to 3500, the COD of the water discharged after Fenton treatment is 35%-40%.

[0066] (2) The effect of the water temperature in the inlet pool on the Fenton reaction is as follows: When the water temperature in the inlet pool is between 25℃ and 35℃, the water temperature has no effect on the Fenton reaction.

[0067] (3)HCO3 - and H2PO4 - No effect on the Fenton reaction.

[0068] (4) The pH value in the reaction tank is stable at around 3.5, ORP is reduced by 150mV-180mV, DO is reduced by 1-2.5mg / L, and Fe 2+ The residual threshold was set at 10 mg / L.

[0069] In this embodiment, during the Fenton treatment, the ratio of H2O2 dosage (mass concentration) to COD in the Fenton reaction zone is 1:1; in terms of molar concentration, Fe 2+ Dosage: H2O2 dosage = 1:1.2.

[0070] The mathematical model of dosage is as follows:

[0071]

[0072] Where f(x1,x2,x3) is COD, x1, x2 and x3 are Fe 2+Residual, DO and ORP;

[0073] In some embodiments, the dosage mathematical model is as follows:

[0074]

[0075] The embodiments of the present application can effectively improve and solve the problems of the existing Fenton process, such as large consumption of reagents and large amount of iron sludge produced; even for the difficult-to-degrade organic wastewater with difficult COD detection, Fe 2+ The system uses residual volume, DO, and ORP to determine the amount of residual volume. This prevents substandard effluent from the Fenton reaction zone due to untimely dosing adjustments. The entire system operates stably, and the addition of Fenton reagent can reduce the amount of wastewater by 18-25% and the amount of iron sludge by 10-20%. Through continuous data accumulation, the dosing mathematical model will continue to improve using AI self-iteration capabilities, resulting in a Fenton dosing formula more suitable for the pyridine pesticide industrial wastewater in this industrial park.

[0076] In the embodiment of the present application, the control device can monitor the current Fe 2+ Residual, current DO and current ORP, thus based on the current Fe 2+ Calculate the expected value of the current H2O2 dosage and Fe based on the residual amount, current DO and current ORP 2+ The current expected value of the dosage is used to control the H2O2 metering pump to add H2O2 and the Fe 2+ The current expected value of the dosage controls Fe 2+ Metering pump to add Fe 2+ The controller calculates the current expected value of H2O2 dosage and Fe based on multiple water quality reaction parameters. 2+ The current dosage expectation is more accurate, achieving H2O2 and Fe 2+ precise delivery.

[0077] Figure 4 FIG. 4 is a schematic diagram of the hardware structure of the controller 40 provided in some embodiments of the present invention. Figure 4 As shown, Figure 4 A processor 101 is taken as an example. The processor 101 and the memory 102 may be connected via a bus or other means. Figure 4 In this example, a bus connection is used. Memory 102, as a non-volatile computer-readable storage medium, can be used to store non-volatile software programs, non-volatile computer executable programs, and modules, such as the program instructions / modules corresponding to the methods in the embodiments of the present invention. Processor 101 executes the various functional applications and data processing of the server by running the non-volatile software programs, instructions, and modules stored in memory 102, thereby implementing the method of the above-mentioned method embodiment.

[0078] The memory 102 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and application programs required for at least one function; the data storage area may store data created according to the use of the control device, etc. In addition, the memory 102 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some embodiments, the memory 102 may optionally include a memory remotely located relative to the processor 101, and these remote memories may be connected to the Fe via a network. 2+ Residual meter, first DO meter, first ORP meter, Fe 2+ Water quality testing equipment such as metering pumps and H2O2 metering pumps. Examples of the aforementioned network include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0079] The one or more modules are stored in the memory 102, and when executed by the at least one processor 101, perform the method in any of the above method embodiments, for example, perform the above described Figure 4 Method steps S41-S44 in.

[0080] The above-mentioned product can execute the method provided by the embodiment of the present invention, and has the functional modules and beneficial effects corresponding to the execution method. For technical details not fully described in this embodiment, please refer to the method provided by the embodiment of the present invention.

[0081] An embodiment of the present invention provides a non-volatile computer-readable storage medium, wherein the non-volatile computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are executed by an electronic device to perform any of the above-described method embodiments, for example, to perform the above-described Figure 4 Method steps S41-S44 in.

[0082] An embodiment of the present invention provides a computer program product, including a computer program stored on a non-volatile computer-readable storage medium, wherein the computer program includes program instructions. When the program instructions are executed by a computer, the computer executes the method in any of the above method embodiments, for example, the method described above. Figure 4 Method steps S41-S44 in.

[0083] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of this embodiment.

[0084] Through the description of the above embodiments, it can be clearly understood by those skilled in the art that each embodiment can be implemented by means of software plus a general hardware platform, and of course can also be implemented by hardware. It can be understood by those skilled in the art that all or part of the processes in the above embodiment methods can be completed by instructing the relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above methods. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM), etc.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Under the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of the present invention as described above. For the sake of simplicity, they are not provided in detail. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for controlling the dosage of Fenton reagent, characterized in that: include Metering pumps and Metering pump, Metering pump is used to control the acid mixing tank The dosage, The metering pump is used to control the Fenton reaction zone in the Fenton reactor. The acid solution blending tank and the Fenton reactor are sequentially arranged along the sewage conveying direction; The method comprises: Monitor the current water quality reaction parameters of the Fenton reaction zone, the current water quality reaction parameters include the current Residual volume, current DO and current ORP; Calculation based on the current water quality reaction parameters The current expected dosage and Current dosage expectations, including: Obtain the mathematical model of the dosage of Fenton reagent; Calculating the current COD of the Fenton reaction zone based on the current water quality reaction parameters and the dosage mathematical model; Calculation based on the current COD of the Fenton reaction zone The current expected dosage and The current dosage expectation value, according to mass concentration, is The ratio of the current dosage expectation value to the current COD of the Fenton reaction zone is 1:

1. According to the molar concentration, the The current dosage expectation is consistent with the The current expected dosage ratio is 1:1~1:3; Wherein, the dosage mathematical model is as follows: In the dosage mathematical model, is the current COD of the Fenton reaction zone, 、 and are the current of the Fenton reaction zone Residual amount, current DO of the Fenton reaction zone and current ORP of the Fenton reaction zone, 、 、 and is the simulation parameter; 、 and is the parameter influence multiple, is a constant; Based on the Current dosage expected value control Metering pump dosing ;as well as, Based on the Current dosage expected value control Metering pump dosing .

2. The method according to claim 1, characterized in that The method further comprises: Obtain the sewage in the water tank concentration, residual chlorine concentration, inlet water alkalinity, water temperature, Concentration and concentration; Based on the concentration, residual chlorine concentration, inlet water alkalinity, water temperature, Concentration and Concentration determination constant size; Wherein, the water inlet tank and the acid solution mixing tank are arranged in sequence along the conveying direction of the sewage.

3. The method according to claim 1, characterized in that The current COD calculation based on the Fenton reaction zone The current expected dosage and Current dosage expectations, including: If it is determined that the current COD is outside the preset COD range, or if it is determined that the current If the residual amount is outside the preset residual amount range, the current COD calculation is based on the The current expected dosage and The current expected value of the dosage.

4. The method according to claim 3, characterized in that The current COD calculation based on the Fenton reaction zone The current expected dosage and The current expected value of dosage also includes: If it is determined that the current COD is within the preset COD range, and the current If the residual amount is within the preset residual amount range, then Initial dosage expectation control Metering pump dosing ,based on Initial dosage expectation control Metering pump dosing .

5. The method according to any one of claims 1 to 4, characterized in that The monitoring of the current water quality reaction parameters in the Fenton reaction zone includes: Sure The initial expected value of the dosage and Initial expected dosage; based on Initial dosage expectation control Metering pump dosing , and, based on the Initial dosage expectation control Metering pump dosing ; In the said based Initial dosage expectation control Metering pump dosing , and, based on the Initial dosage expectation control Metering pump dosing Afterwards, the current water quality reaction parameters of the Fenton reaction zone are monitored.

6. The method according to claim 5, characterized in that The determination The initial expected value of the dosage and The initial dosage expectations include: Obtain the initial water quality reaction parameters of the sewage in the inlet tank; Determining an initial COD value of the sewage in the inlet pool based on the initial water quality reaction parameters; Determined based on initial COD value The initial expected value of the dosage and The initial dosage expectation is based on mass concentration. The ratio of the initial dosage expectation value to the initial COD value is 1:

1. According to the molar concentration, the The initial dosage expectation is the same as the The expected ratio of the initial dosage is 1:1~1:

3.

7. A device for controlling the dosage of a Fenton reaction reagent, characterized in that: The device comprises: Residue detector, the The residual detector is used to monitor the Fenton reaction zone in the Fenton reactor. Residual amount; a first DO detector, the first DO detector being used to monitor the DO of the Fenton reaction zone; a first ORP detector, the first ORP detector being used to monitor the ORP of the Fenton reaction zone; Metering pump, The metering pump is used to control the Fenton reaction zone The dosage; Metering pump, The metering pump is used to control the dosage of hydrogen peroxide during the Fenton reaction; at least one processor; and, a memory communicatively connected to the at least one processor; wherein, described Residual meter, first DO meter, first ORP meter, Metering pumps and a metering pump in communication with the at least one processor; The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the method according to any one of claims 1 to 6.

8. The device according to claim 7, characterized in that The device further comprises: A second DO detector, the second DO detector is used to monitor the DO of the water inlet pool; a second ORP detector, the second ORP detector being used to monitor the ORP of the Fenton reaction zone; The second DO detector and the second ORP detector are communicatively connected to the at least one processor.

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