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CN-121470620-B - Electrocatalytic oxidation control method, control system, medium and product

CN121470620BCN 121470620 BCN121470620 BCN 121470620BCN-121470620-B

Abstract

An electrocatalytic oxidation control method, a control system, a medium and a product relate to the field of electric digital data processing. According to the application, the control system determines the COD allowable fluctuation interval based on the instantaneous inflow COD concentration, calculates the average current efficiency and is used for determining the working current, and then accurately controls the electrocatalytic oxidation process according to the current density and the hydraulic retention time. The self-adaptive control method can timely respond to the water quality change of the inlet water, avoids energy waste while ensuring that the outlet water reaches the standard, and has higher treatment efficiency and better economy compared with the traditional constant current density control mode. When the water outlet exceeds the standard, the control system can automatically adjust the average current efficiency and execute the control flow again, thereby forming closed-loop control.

Inventors

  • ZHANG GUOYING

Assignees

  • 达斯玛环境科技（北京）有限公司

Dates

Publication Date
20260512
Application Date
20251029

Claims (10)

  1. 1. An electrocatalytic oxidation control method, characterized by being applied to a control system, the method comprising: S101, acquiring instantaneous water inflow and instantaneous water inflow COD concentration, and determining a COD allowable fluctuation interval according to the instantaneous water inflow COD concentration, wherein the COD allowable fluctuation interval comprises a preset number of water inflow COD concentrations; s102, respectively inputting the COD concentration of each inflow water in the COD allowable fluctuation interval into a preset current efficiency calculation formula to obtain the current efficiencies of the preset quantity, and calculating the average current efficiency; S103, inputting the average current efficiency into a preset current calculation formula to obtain working current, and calculating current density according to the working current and the sectional area of the anode plate; s104, if the current density is smaller than or equal to a preset value, determining the ratio of the effective reaction volume of the reactor to the instantaneous water inflow as hydraulic retention time; s105, detecting the COD concentration of the effluent after the hydraulic retention time; And S106, if the effluent COD concentration is greater than the standard effluent COD concentration, adjusting the average current efficiency to be the current efficiency minimum value, and re-executing the steps after S103 and S103.
  2. 2. The method according to claim 1, wherein after the step of S101 of obtaining an instantaneous intake water flow rate and an instantaneous intake water COD concentration, and determining a COD tolerance fluctuation interval including a preset number of intake water COD concentrations therein according to the instantaneous intake water COD concentration, the method further comprises: Acquiring water inflow rates detected in two adjacent times, and calculating the water inflow rate change rate detected in two adjacent times; if the inflow rate change rate shows that the inflow rate is increased by more than a preset first percentage, increasing the working current according to the inflow rate change rate, and executing the steps of calculating the current density and the later according to the working current and the sectional area of the anode plate in S103; if the inflow rate change indicates that the inflow rate is reduced by more than a preset first percentage, reducing the working current according to the inflow rate change, and executing the steps of calculating the current density and the following steps according to the working current and the sectional area of the anode plate in S103.
  3. 3. The method of claim 1, wherein the predetermined current efficiency calculation formula is: ; Wherein, the The current efficiency is represented by CODin, the instantaneous water inflow COD concentration is represented by CODout, the instantaneous water outflow COD concentration is represented by n, the stoichiometric coefficient of the electron transfer number is represented by F, the Faraday constant is represented by Qin, the instantaneous water inflow flow is represented by M O2 , the molar mass of oxygen is represented by Iin-out, the current value corresponding to the instantaneous water inflow COD concentration and the instantaneous water outflow COD concentration is represented by Iin-out, and the instantaneous water outflow COD concentration is the water outflow COD concentration measured at the same moment when the instantaneous water inflow COD concentration is measured.
  4. 4. The method of claim 1, wherein the predetermined current calculation formula is: ; Wherein I represents the working current, CODin represents the instantaneous water inflow COD concentration, CODstandard _out represents the standard water outflow COD concentration, n represents the stoichiometric coefficient of the electron transfer number, F represents the Faraday constant, qin represents the instantaneous water inflow, M O2 represents the molar mass of oxygen, Representing the average current efficiency.
  5. 5. The method according to claim 1, wherein in step S103, the average current efficiency is input to a preset current calculation formula to obtain an operating current, and after the step of calculating the current density according to the operating current and the anode plate cross-sectional area, the method further comprises: If the current density is larger than the preset value, adjusting the current density to the preset value, and determining the current density reduction amplitude; and reducing the instantaneous water inflow according to the current density reduction amplitude, and executing steps after S105 and S105.
  6. 6. The method according to claim 1, wherein the method further comprises: Acquiring actual voltage between an anode plate and a cathode plate, and comparing the actual voltage with a standard voltage, wherein the standard voltage is a voltage measured when the cathode plate is not scaled; and if the actual voltage is increased by more than a preset second percentage compared with the standard voltage, injecting pickling solution into the reactor through a pickling water pump to clean the electrode.
  7. 7. The method according to claim 1, wherein after the step of detecting the COD concentration of the effluent after the hydraulic retention period, the method further comprises: if the COD concentration of the effluent is reduced by more than a preset third percentage compared with the COD concentration of the standard effluent, calculating the surplus degree of COD treatment; the current density is reduced according to the degree of surplus, and steps after S104 and S104 are performed.
  8. 8. A control system comprising one or more processors and memory coupled to the one or more processors, the memory to store computer program code comprising computer instructions that the one or more processors invoke to cause the control system to perform the method of any of claims 1-7.
  9. 9. A computer readable storage medium comprising instructions which, when run on a control system, cause the control system to perform the method of any of claims 1-7.
  10. 10. A computer program product, characterized in that the computer program product, when run on a control system, causes the control system to perform the method according to any of claims 1-7.

Description

Electrocatalytic oxidation control method, control system, medium and product Technical Field The application relates to the field of electric digital data processing, in particular to an electrocatalytic oxidation control method, a control system, a medium and a product. Background As industrialization progresses, industrial wastewater treatment demands are increasing. The electrocatalytic oxidation technology has the characteristics of high efficiency, environmental protection, easiness in automatic control and the like, and has great application potential in the aspect of treating industrial wastewater containing refractory organic matters. The electrocatalytic oxidation technology utilizes active substances generated on the surface of an electrode and direct electron transfer action by applying an electric field in industrial wastewater so as to effectively degrade pollutants such as Chemical Oxygen Demand (COD) and the like in the water. In the related art, the electrocatalytic oxidation technology mainly adopts a constant current density control mode to operate, namely an operator sets current density according to experience to drive electrocatalytic oxidation reaction, and adjusts hydraulic retention time to meet the required COD concentration requirement of effluent. However, the COD concentration of the inflow water of the industrial wastewater generally has large fluctuation, and the constant current density control mode is difficult to respond to the change of the quality of the inflow water in time. When the COD concentration of the inflow water is low, the energy waste is caused by the excessively high current density, and when the COD concentration of the inflow water is high, the fixed current density can not meet the treatment requirement. Disclosure of Invention The application provides an electrocatalytic oxidation control method, a control system, a medium and a product, which are used for improving the treatment efficiency of electrocatalytic oxidation. In the first aspect, the application provides an electrocatalytic oxidation control method which is applied to a control system and comprises the steps of S101, obtaining instantaneous water inflow flow and instantaneous water inflow COD concentration, determining a COD allowable fluctuation interval according to the instantaneous water inflow COD concentration, wherein the COD allowable fluctuation interval comprises a preset number of water inflow COD concentrations, S102, respectively inputting each water inflow COD concentration in the COD allowable fluctuation interval into a preset current efficiency calculation formula to obtain a preset number of current efficiencies and calculate average current efficiencies, S103, inputting the average current efficiency into the preset current calculation formula to obtain working current, calculating current density according to the working current and the sectional area of an anode plate, S104, determining the ratio of the effective reaction volume of a reactor to the instantaneous water inflow flow as a hydraulic retention time, S105, detecting the water outflow COD concentration after the hydraulic retention time, S106, and re-executing the steps after S103 and S103 if the water outflow COD concentration is larger than the standard water outflow COD concentration, and the average current efficiency is adjusted to be the current efficiency minimum. By adopting the technical scheme, the control system determines the COD allowable fluctuation interval based on the instantaneous inflow COD concentration, calculates the average current efficiency and is used for determining the working current, and then accurately controls the electrocatalytic oxidation process according to the current density and the hydraulic retention time. The self-adaptive control method can timely respond to the water quality change of the inlet water, avoids energy waste while ensuring that the outlet water reaches the standard, and has higher treatment efficiency and better economy compared with the traditional constant current density control mode. When the water outlet exceeds the standard, the control system can automatically adjust the average current efficiency and execute the control flow again, thereby forming closed-loop control. In combination with some embodiments of the first aspect, in some embodiments, after the step of obtaining the instantaneous intake flow and the instantaneous intake COD concentration and determining the COD tolerance fluctuation interval according to the instantaneous intake COD concentration, the COD tolerance fluctuation interval includes a preset number of intake COD concentrations, the method further includes obtaining intake flow detected twice adjacently and calculating a change rate of intake flow detected twice adjacently, if the change rate of intake flow shows that the intake flow increases by more than a preset first percentage, increasing the working current according to the