Electrochemical treatment method and system based on tungsten smelting wastewater detection

Abstract

The invention relates to the technical field of metal smelting wastewater treatment, in particular to an electrochemical treatment method and system based on tungsten smelting wastewater detection.The method comprises the steps that workshop wastewater of a tungsten smelting plant is obtained; pre-constructed pretreatment equipment is used for conducting filtering control operation based on arsenic and fluorine on the workshop wastewater, and pretreated wastewater is obtained; carrying out electrocatalytic oxidation operation on the pretreated wastewater based on COD (Chemical Oxygen Demand) and ammonia nitrogen by utilizing pre-constructed electrochemical treatment equipment to obtain oxide wastewater; performing oxide separation operation on the oxide wastewater to obtain to-be-discharged wastewater, and performing content detection of a preset substance type on the to-be-discharged wastewater to obtain a wastewater component table; judging whether the wastewater component table belongs to a preset target-grade discharge standard or not; and when the wastewater component table belongs to the target-grade discharge standard, obtaining to-be-discharged wastewater meeting the target-grade discharge standard. The method can improve the tungsten smelting wastewater purification grade and reduce the wastewater treatment cost.

Description

Technical Field

[0001] The present invention relates to the technical field of microbial fermentation regulation and control, and in particular to an electrochemical treatment method and system based on tungsten smelting wastewater detection. Background Art

[0002] Tungsten smelting produces a large amount of wastewater that is difficult to treat. Due to the presence of a variety of pollutants and serious hazards, it affects the ecological environment. Among them, the main pollutants in the wastewater are ammonia nitrogen, COD, arsenic, cadmium, fluorine, etc., and the salt content is as high as about 10g / L. Most of these pollutants are introduced during the processing of raw tungsten concentrate, and their content will fluctuate with the change of raw materials.

[0003] Nowadays, the wastewater of enterprises in the industry needs to be discharged to the industrial park wastewater treatment station as required. However, the mainstream biological method used by the wastewater treatment station is difficult to treat the high-salt wastewater, resulting in the use of the chemical method to treat the production wastewater. The chemical method adds chemicals for treatment, which makes it difficult to remove fluorine to meet the discharge standards, with high treatment costs, failure to fully meet the discharge standards, and the risk of secondary pollution. Summary of the invention

[0004] The present invention provides an electrochemical treatment method based on tungsten smelting wastewater detection, the main purpose of which is to improve the purification level of tungsten smelting wastewater and reduce the cost of wastewater treatment.

[0005] To achieve the above object, the present invention provides an electrochemical treatment method based on tungsten smelting wastewater detection, comprising:

[0006] Obtain workshop wastewater from tungsten smelters;

[0007] Using pre-built pretreatment equipment, the workshop wastewater is subjected to arsenic and fluorine-based filtering control operations to obtain pre-treated wastewater, and the arsenic and fluorine component values ​​in the pre-treated wastewater are detected;

[0008] Determining whether the arsenic and fluorine component values ​​are greater than a preset pretreatment qualification standard;

[0009] When the arsenic and fluorine content value is greater than the pretreatment qualified standard, the pretreated wastewater is introduced into the pretreatment equipment for re-filtration until the arsenic and fluorine content value is less than or equal to the pretreatment qualified standard;

[0010] When the arsenic-fluorine component value is less than or equal to the pretreatment qualified standard, the pretreated wastewater is subjected to an electrocatalytic oxidation operation based on COD and ammonia nitrogen using a pre-constructed electrochemical treatment device to obtain oxide wastewater;

[0011] Performing an oxide separation operation on the oxide wastewater to obtain wastewater to be discharged, and performing a content detection of a preset substance type on the wastewater to be discharged to obtain a wastewater composition table;

[0012] Determine whether the wastewater composition table meets the preset target level emission standards;

[0013] When the wastewater composition table does not meet the target level discharge standard, the wastewater to be discharged is introduced into the electrochemical treatment device for re-filtration until the wastewater composition table meets the target level discharge standard;

[0014] When the wastewater composition table belongs to the target level emission standard, wastewater to be discharged that meets the target level emission standard is obtained.

[0015] Optionally, the pre-constructed pre-treatment equipment is used to perform arsenic and fluorine-based filtering and control operations on the workshop wastewater to obtain pre-treated wastewater, including:

[0016] Using pre-constructed pretreatment equipment and pre-constructed calcium salt to perform primary sedimentation on the workshop wastewater to obtain arsenic-removed wastewater;

[0017] Using pre-constructed iron salt to perform sedimentation operation on the arsenic removal wastewater to obtain deep arsenic removal wastewater;

[0018] Performing an acid-base metal ion precipitation operation on the deep arsenic removal wastewater to obtain primary pretreated wastewater;

[0019] The pre-constructed complex defluoridation agent is used to carry out a fluoride ion complex precipitation operation on the primary pre-treated wastewater according to a preset pH environment to obtain pre-treated wastewater.

[0020] Optionally, the pre-constructed electrochemical treatment equipment is used to perform an electrocatalytic oxidation operation based on COD and ammonia nitrogen on the pre-treated wastewater to obtain oxide wastewater, including:

[0021] Using a pre-constructed electrochemical treatment device, the conductivity of the pre-treated wastewater is detected, and the conductivity of the pre-treated wastewater is adjusted to a preset suitable range according to the pre-constructed electrolyte to obtain conductive standard wastewater;

[0022] Performing an oxidation operation on the conductive standard wastewater to obtain initial oxide wastewater, adding the initial oxide wastewater at a uniform speed using a pre-constructed high molecular polymer according to a preset adding speed, and detecting the oxide content of the initial oxide wastewater during the uniform adding process to obtain an oxide content change curve;

[0023] Calculating a correlation score between the addition rate and the oxide content variation curve;

[0024] When the correlation score is less than a preset correlation threshold, the use of the pre-constructed high molecular polymer is stopped, the initial oxide wastewater is added at a uniform speed according to a preset addition speed, and the rate of change of the oxide content change curve is identified;

[0025] When the rate of change of the oxide content change curve is less than a preset stability threshold, the initial oxide wastewater is used as oxide wastewater.

[0026] Optionally, the oxidation operation is performed on the conductive standard wastewater to obtain initial oxide wastewater, comprising:

[0027] Using the anode plate pre-constructed in the electrochemical treatment equipment, according to a preset first control current, the conductive standard wastewater is directly oxidized to obtain primary oxide wastewater;

[0028] The electrode plates pre-constructed in the electrochemical treatment equipment are used to generate a strong oxidant according to a preset second control current, and the primary oxide wastewater is oxidized by the strong oxidant to obtain initial oxide wastewater, wherein the electrode plates include the anode plates.

[0029] Optionally, the oxide content detection of the initial oxide wastewater to obtain an oxide content change curve includes:

[0030] Adjusting the pH value of the initial oxide wastewater to be neutral to obtain neutral oxide wastewater;

[0031] Using a pre-constructed ultraviolet-visible absorption spectrum, the soluble oxides are identified in the neutral oxide wastewater to obtain a soluble oxide concentration content sequence;

[0032] Using a pre-constructed X-ray diffraction spectrum, solid oxides are identified in the neutral oxide wastewater to obtain a solid oxide mass content sequence;

[0033] The oxide content variation curve is calculated based on the soluble oxide concentration content sequence and the solid oxide mass content sequence, and the pre-constructed oxidation equivalent factors of each oxide.

[0034] Optionally, the calculation of the oxide content variation curve according to the soluble oxide concentration content sequence and the solid oxide mass content sequence, and the pre-constructed oxidation equivalent factors of each oxide, includes:

[0035] According to the pre-constructed oxidation equivalent factors of each oxide and the soluble oxide concentration content sequence, the liquid oxide oxygen concentration is calculated, wherein the liquid oxide oxygen concentration is expressed as:

[0036]

[0037] In the formula, represents the oxygen concentration of liquid oxide, N represents the total number of dissolved oxide types in the dissolved oxide concentration content sequence, C i represents the concentration of the ith soluble oxide category, P i represents the oxidation equivalent factor of the i-th soluble oxide category;

[0038] According to the oxidation equivalent factors of the respective oxides and the solid oxide mass content sequence, the solid oxide oxygen content is calculated, wherein the solid oxide oxygen content is expressed as:

[0039]

[0040] In the formula, represents the oxygen content of the solid oxide, M represents the total number of solid oxide types in the solid oxide mass content sequence, and D i represents the mass content of the ith solid oxide, K i represents the oxidation equivalence factor of the ith solid oxide category, where K i and P i All belong to the oxidation equivalent factors of the respective oxides;

[0041] The wastewater volume of the neutral oxide wastewater is obtained, and the solid oxide oxygen concentration corresponding to the solid oxide oxygen content is calculated according to the wastewater volume, wherein the solid oxide oxygen concentration is expressed as:

[0042]

[0043] In the formula, represents the oxygen concentration of solid oxide, and L represents the volume of the wastewater;

[0044] The oxygen concentration of the solid oxide and the oxygen concentration of the liquid oxide are summed and calculated to obtain the oxide content;

[0045] The oxide content at each time point during the uniform addition process is recorded to obtain an oxide content variation curve.

[0046] Optionally, the calculating the correlation score between the addition rate and the oxide content variation curve includes:

[0047] Calculating the rate of change of the oxide content change curve to obtain a first rate of change;

[0048] Calculating the difference in value between the adding speed and the first changing rate to obtain a correlation difference;

[0049] The change rate of the correlation difference is calculated to obtain a second change rate, and the second change rate is inversely proportional to obtain a correlation score.

[0050] Optionally, after obtaining the wastewater to be discharged that meets the target level discharge standard, the method further includes:

[0051] Using a pre-constructed double alkali method to precipitate calcium and magnesium ions in the oxide wastewater to obtain double alkali softened wastewater;

[0052] Using a pre-constructed nanofiltration device, the double-alkali softened wastewater is subjected to a salt separation operation to obtain a divalent salt water and a monovalent salt water;

[0053] Using a pre-built reverse osmosis device to reverse osmosis the monovalent salt water to obtain fresh water and concentrated salt water of a preset concentration;

[0054] Using a pre-built double-membrane electrodialysis device, the concentrated brine is dialyzed to obtain an acid solution and an alkaline solution;

[0055] The fresh water is stored, the divalent salt water is discharged, and the acid solution and the alkaline solution are stored, and the acid-base solution with a preset ratio in the stored acid solution and the alkaline solution is obtained, and the acid-base solution is transported to the pretreatment equipment and the electrochemical treatment equipment.

[0056] Optionally, after introducing the pretreated wastewater into the pretreatment equipment for re-filtration, the method further comprises:

[0057] Performing magnitude statistics on the pretreated wastewater returned to the pretreatment device to obtain a wastewater circulation flow value, and monitoring the wastewater circulation flow value to obtain a wastewater circulation flow curve;

[0058] Using a pre-trained pretreatment feeding control model, according to the wastewater circulation flow curve, control parameters of the pretreatment equipment are predicted to obtain a set of predicted pretreatment control parameters;

[0059] According to the predicted pretreatment control parameter set, the parameters of the pretreatment equipment are updated to obtain an updated wastewater circulation flow curve, wherein the updated wastewater circulation flow curve remains within a preset flow limit range.

[0060] To achieve the above object, the present invention also provides an electrochemical treatment system based on tungsten smelting wastewater detection, comprising:

[0061] A pretreatment module, for obtaining workshop wastewater of a tungsten smelter, and using a pre-constructed pretreatment device to perform a filtering control operation based on arsenic and fluorine on the workshop wastewater to obtain pretreated wastewater, and detecting the arsenic and fluorine component values ​​in the pretreated wastewater, and determining whether the arsenic and fluorine component values ​​are greater than a preset pretreatment qualified standard, and when the arsenic and fluorine component values ​​are greater than the pretreatment qualified standard, introducing the pretreated wastewater into the pretreatment device for re-filtration until the arsenic and fluorine component values ​​are less than or equal to the pretreatment qualified standard;

[0062] The electrochemical treatment module is used for, when the arsenic-fluorine component value is less than or equal to the pretreatment qualified standard, using the pre-constructed electrochemical treatment equipment, to perform an electrocatalytic oxidation operation based on COD and ammonia nitrogen on the pre-treated wastewater to obtain oxide wastewater, and to perform an oxide separation operation on the oxide wastewater to obtain wastewater to be discharged, and to detect the content of preset substance types on the wastewater to be discharged to obtain a wastewater composition table, and to determine whether the wastewater composition table belongs to the preset target level emission standard, and when the wastewater composition table does not belong to the target level emission standard, the wastewater to be discharged is introduced into the electrochemical treatment equipment for re-filtration until the wastewater composition table belongs to the target level emission standard, and when the wastewater composition table belongs to the target level emission standard, the wastewater to be discharged that meets the target level emission standard is obtained.

[0063] In order to solve the above problem, the present invention further provides an electronic device, the electronic device comprising:

[0064] A memory storing at least one instruction;

[0065] The processor executes the instructions stored in the memory to implement the above-mentioned electrochemical treatment method based on tungsten smelting wastewater detection.

[0066] In order to solve the above problems, the present invention also provides a computer-readable storage medium, in which at least one instruction is stored. The at least one instruction is executed by a processor in an electronic device to implement the above-mentioned electrochemical treatment method based on tungsten smelting wastewater detection.

[0067] The present invention is to solve the problem described in the background technology. The present invention first removes arsenic and fluorine in workshop wastewater through pretreatment equipment to obtain pretreated wastewater. In the pretreatment process, some metal ions precipitated by acidity and alkalinity can be effectively removed by adjusting the pH value. Then, through the principle of electrocatalytic oxidation, COD and ammonia nitrogen are directly electrocatalytically oxidized by gaining and losing electrons on the surface of the plate through the plate, and COD and ammonia nitrogen can also be indirectly oxidized by strong oxidants generated by electrolysis, thereby reducing COD and ammonia nitrogen. In the electrotreatment process, only the current and residence time need to be adjusted without adding other agents, which eliminates secondary pollution, saves wastewater treatment costs, and improves environmental protection. Therefore, the present invention can improve the purification level of tungsten smelting wastewater and reduce wastewater treatment costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] Figure 1 A schematic flow chart of an electrochemical treatment method for tungsten smelting wastewater detection provided by one embodiment of the present invention;

[0069] Figure 2 A schematic diagram of the equipment structure of an electrochemical treatment method based on tungsten smelting wastewater detection provided in one embodiment of the present invention;

[0070] Figure 3 A functional module diagram of an electrochemical treatment system based on tungsten smelting wastewater detection provided by one embodiment of the present invention;

[0071] Figure 4 A schematic diagram of the structure of an electronic device for implementing the electrochemical treatment method based on tungsten smelting wastewater detection provided in one embodiment of the present invention.

[0072] Description of reference numerals:

[0073] 1. Electronic device; 10. Processor; 11. Memory; 12. Bus.

[0074] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0075] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0076] The embodiment of the present application provides an electrochemical treatment method based on tungsten smelting wastewater detection. The execution subject of the electrochemical treatment method based on tungsten smelting wastewater detection includes but is not limited to at least one of the electronic devices such as a server and a terminal that can be configured to execute the method provided in the embodiment of the present application. In other words, the electrochemical treatment method based on tungsten smelting wastewater detection can be executed by software or hardware installed on a terminal device or a server device, and the software can be a blockchain platform. The server includes but is not limited to: a single server, a server cluster, a cloud server or a cloud server cluster, etc.

[0077] Reference Figure 1 FIG. 1 is a flow chart of an electrochemical treatment method based on tungsten smelting wastewater detection according to an embodiment of the present invention. In this embodiment, the electrochemical treatment method based on tungsten smelting wastewater detection includes:

[0078] S1. Obtain workshop wastewater from tungsten smelting plant.

[0079] Among them, the main pollutants in the workshop wastewater are ammonia nitrogen, COD, arsenic, fluorine, etc. Among them, the COD refers to Chemical Oxygen Demand, which is one of the important indicators to measure the degree of organic pollution in water bodies. The higher the COD, the more pollutants that can be oxidized in the water body and the higher the degree of pollution.

[0080] Specifically, in the embodiment of the present invention, the production rate of the workshop wastewater is 100 cubic meters per hour.

[0081] S2. Using the pre-built pretreatment equipment, perform arsenic and fluorine-based filtering control operations on the workshop wastewater to obtain pre-treated wastewater, and detect the arsenic and fluorine component values ​​in the pre-treated wastewater.

[0082] Among them, reference Figure 2 As shown, the pretreatment equipment includes 2# regulating tank, 1# horizontal flow sedimentation tank, 2# horizontal flow sedimentation tank, pretreatment system 1 and pretreatment system 2. Wherein, the pretreatment system 1 is used to control calcium salt (such as calcium chloride) and iron salt (such as ferrous sulfate) to remove arsenic. The pretreatment system 2 is used to control the complex defluoridation agent (such as aluminum sulfate, ferrous sulfate) to remove fluorine. Wherein, the pretreatment system 1 and the pretreatment system 2 can also control the acidity and alkalinity of the workshop wastewater by controlling the amount of alkaline solution (such as liquid caustic soda) and acid solution (such as hydrochloric acid).

[0083] The arsenic-fluorine content refers to the content of arsenic and fluorine in the wastewater.

[0084] In detail, in the embodiment of the present invention, the pre-constructed pre-treatment equipment is used to perform arsenic and fluorine-based filtering control operations on the workshop wastewater to obtain pre-treated wastewater, including:

[0085] Using pre-constructed pretreatment equipment and pre-constructed calcium salt to perform primary sedimentation on the workshop wastewater to obtain arsenic-removed wastewater;

[0086] Using pre-constructed iron salt to perform sedimentation operation on the arsenic removal wastewater to obtain deep arsenic removal wastewater;

[0087] Performing an acid-base metal ion precipitation operation on the deep arsenic removal wastewater to obtain primary pretreated wastewater;

[0088] The pre-constructed complex defluoridation agent is used to carry out a fluoride ion complex precipitation operation on the primary pre-treated wastewater according to a preset pH environment to obtain pre-treated wastewater.

[0089] Wherein, the calcium salt is calcium chloride. Wherein, the primary sedimentation is to sediment most of the arsenic once. Wherein, the arsenic removal wastewater is wastewater with reduced arsenic content.

[0090] Wherein, the iron salt refers to ferrous sulfate. Wherein, the sedimentation operation refers to the operation of maximally sedimentating the remaining arsenic. Wherein, the deep arsenic removal wastewater is wastewater with an arsenic ion content less than a concentration set artificially, and the embodiment of the present invention considers that the deep arsenic removal wastewater is wastewater without arsenic.

[0091] In the embodiment of the present invention, the depth refers to a further meaning.

[0092] The complex defluoridation agent refers to a chemical agent used to remove fluoride ions (F-) in wastewater, which usually converts fluoride ions into water-insoluble compounds through complex reaction or precipitation reaction, thereby achieving the removal of fluoride ions.

[0093] The acid-base metal ion precipitation operation refers to the operation in which when the acidity and alkalinity (pH value) of the wastewater is adjusted, the dissolution equilibrium changes, and the metal ions react with the precipitant to form insoluble compounds to remove the metals.

[0094] The preset pH environment refers to a pH value that matches the complex defluorinating agent, and different complex defluorinating agents may complex with fluoride ions and then precipitate under different pH environments.

[0095] Specifically, in the embodiment of the present invention, calcium ions can react with arsenate ions (AsO 4 3- ) or hydrogen arsenate ion (HAsO 4 2- ) reaction to form an insoluble precipitate, so through calcium salt pretreatment, arsenic removal wastewater can be initially obtained. 3+ ) can act as an oxidant to promote the conversion of arsenic from toxic arsenic compounds (such as As 3+) is oxidized to the less toxic arsenate (As 5+ ), thereby enhancing its removal effect. The present invention further adds iron salt for deep treatment to further form precipitation, obtains deep arsenic removal wastewater, and achieves arsenic removal effect. This can reduce the arsenic content of the effluent to below the standard. At the same time, through the change of pH value (here adjusted by alkali solution), other heavy metals contained in the wastewater can also be effectively removed. The arsenic and some other heavy metals removed in the embodiment of the present invention are collected in the 1# horizontal flow sedimentation tank.

[0096] Specifically, in the embodiment of the present invention, calcium salts (such as calcium hydroxide, calcium chloride, etc.) are dissolved in water to release calcium ions (Ca 2+ ). Fluoride ions react with calcium ions to form insoluble calcium fluoride (CaF 2 ) precipitation principle, after calcium salt pretreatment, most of the fluoride ions are precipitated into calcium fluoride; then aluminum sulfate or complex defluoridation agent is added for deep treatment, so that the fluoride ions form a complex with the metal ions in the defluoridation agent, and finally precipitate at an appropriate pH value (here adjusted by hydrochloric acid) to achieve the effect of removing fluoride. Among them, fluoride ions and some other heavy metals are collected in the 2# horizontal flow sedimentation tank.

[0097] S3. Determine whether the arsenic and fluorine component values ​​are greater than a preset pretreatment qualification standard.

[0098] Wherein, the pretreatment qualification criteria include:

[0099] (1) Arsenic is stabilized to below 0.1 mg / L;

[0100] (2) Fluoride is stabilized to below 10 mg / L.

[0101] When the arsenic-fluorine content value is greater than the pretreatment qualified standard, the pretreated wastewater is introduced into the pretreatment equipment for re-filtration until the arsenic-fluorine content value is less than or equal to the pretreatment qualified standard.

[0102] In the embodiment of the present invention, the more purified pre-treated wastewater will enter the electrochemical treatment step together with the pre-treated wastewater that meets the pre-treatment qualification standards.

[0103] Specifically, in an embodiment of the present invention, the 2# horizontal flow sedimentation tank can discharge water to a pre-constructed intermediate water tank. If the arsenic and fluorine component values ​​are greater than the pretreatment qualified standards, it indicates that the wastewater pollutants may be harmful to the environment and can be re-introduced into the 2# regulating tank for repeated arsenic and fluorine removal.

[0104] In detail, in the embodiment of the present invention, after the pretreated wastewater is introduced into the pretreatment equipment for re-filtration, the method further comprises:

[0105] Performing magnitude statistics on the pretreated wastewater returned to the pretreatment device to obtain a wastewater circulation flow value, and monitoring the wastewater circulation flow value to obtain a wastewater circulation flow curve;

[0106] Using a pre-trained pretreatment feeding control model, according to the wastewater circulation flow curve, control parameters of the pretreatment equipment are predicted to obtain a set of predicted pretreatment control parameters;

[0107] According to the predicted pretreatment control parameter set, the parameters of the pretreatment equipment are updated to obtain an updated wastewater circulation flow curve, wherein the updated wastewater circulation flow curve remains within a preset flow limit range.

[0108] The magnitude statistics refers to the speed recording operation of introducing the pretreated wastewater into the pretreatment equipment.

[0109] The wastewater circulation flow value refers to the amount of pretreated wastewater that returns to the pretreatment equipment per unit time, in liters per hour.

[0110] The monitoring refers to the operation of recording the wastewater circulation flow value according to the change of the timestamp.

[0111] The wastewater circulation flow curve refers to a record of wastewater circulation flow values ​​within a period, such as a day or a week.

[0112] Among them, the pretreatment feeding control model refers to a neural network model, which can adjust some parameters in the pretreatment equipment according to the wastewater circulation flow curve, so that the wastewater circulation flow curve changes more smoothly, for example, the change rate of the wastewater circulation flow curve is less than a certain value.

[0113] Among them, the control parameter prediction refers to the process of predicting the [mapping relationship between the change of the wastewater circulation flow curve and the change of the feed amount of the pretreatment equipment] obtained in the pre-training process, which will not be elaborated here.

[0114] The predicted pretreatment control parameter set includes at least the input speed or input amount of liquid alkali, hydrochloric acid, calcium chloride, etc. The pretreatment equipment will perform arsenic and fluorine-based filtering control operations according to the predicted pretreatment control parameter set.

[0115] The flow restriction interval is related to the actual specifications of the wastewater treatment plant and can be modified according to specific circumstances.

[0116] Specifically, the present invention can automatically control the pretreatment parameters through the pre-trained pretreatment feeding control model, so that the process of re-filtering the pre-treated wastewater can increase stability. In addition, through training, the input amount of iron salts, calcium salts, acids and alkalis in the pretreatment equipment can be judged according to the feeding records of the tungsten smelter and the output rate of the workshop wastewater, which can reduce the number of times the pre-treated wastewater is re-filtered, or even cancel the re-filtering process of the pre-treated wastewater.

[0117] When the arsenic-fluorine component value is less than or equal to the pretreatment qualified standard, S4, using the pre-constructed electrochemical treatment equipment, the pre-treated wastewater is subjected to an electrocatalytic oxidation operation based on COD and ammonia nitrogen to obtain oxide wastewater.

[0118] In the embodiment of the present invention, when the arsenic and fluorine component values ​​are less than or equal to the pretreatment qualified standard, it indicates that the pretreated wastewater meets the specification.

[0119] Among them, reference Figure 2 As shown, the electrochemical treatment equipment includes an electrocatalytic device and a nanocrystalline magnetic separation device.

[0120] The electrocatalytic device can directly oxidize the easily oxidizable substances in the wastewater, or can indirectly oxidize some easily oxidizable substances in the wastewater by generating a strong oxidant.

[0121] Among them, the nanocrystal magnetic separation is a method of achieving efficient separation and enrichment of target substances by utilizing the special properties of magnetic nanoparticles (such as high molecular polymers such as polyacrylamide) and the effect of an external magnetic field. Some ions in the wastewater will bind to the magnetic nanoparticles through physical adsorption, chemical bonding or biological recognition.

[0122] The electrocatalytic oxidation operation refers to the operation of oxidizing some substances in the wastewater by electric current.

[0123] In detail, in an embodiment of the present invention, the pre-constructed electrochemical treatment equipment is used to perform an electrocatalytic oxidation operation based on COD and ammonia nitrogen on the pre-treated wastewater to obtain oxide wastewater, including:

[0124] Using a pre-constructed electrochemical treatment device, the conductivity of the pre-treated wastewater is detected, and the conductivity of the pre-treated wastewater is adjusted to a preset suitable range according to the pre-constructed electrolyte to obtain conductive standard wastewater;

[0125] Performing an oxidation operation on the conductive standard wastewater to obtain initial oxide wastewater, adding the initial oxide wastewater at a uniform speed using a pre-constructed high molecular polymer according to a preset adding speed, and detecting the oxide content of the initial oxide wastewater during the uniform adding process to obtain an oxide content change curve;

[0126] Calculating a correlation score between the addition rate and the oxide content variation curve;

[0127] When the correlation score is less than a preset correlation threshold, the use of the pre-constructed high molecular polymer is stopped, the initial oxide wastewater is added at a uniform speed according to a preset addition speed, and the rate of change of the oxide content change curve is identified;

[0128] When the rate of change of the oxide content change curve is less than a preset stability threshold, the initial oxide wastewater is used as oxide wastewater.

[0129] Wherein, the electrolyte is sodium chloride.

[0130] Wherein, the suitable range refers to 1mS / cm-5mS / cm.

[0131] The oxidation operation is divided into electrocatalytic oxidation of COD and ammonia nitrogen. In the COD degradation mechanism, the anode produces hydroxyl radicals (·OH) or other strong oxidizing substances (such as Q 2 , Cl 2 , hypochlorite ClO - etc.), directly oxidizes organic matter in wastewater to reduce COD. The active chlorine (Cl 2 , ClO - ) reacts with ammonia nitrogen to generate nitrogen gas (N 2 ) or other intermediate products.

[0132] The uniform addition refers to the uniform introduction of high molecular polymer into the initial oxide wastewater.

[0133] The adding speed is related to the type and concentration of the high molecular polymer and the concentration of pollutants in the wastewater, and can be configured according to actual conditions.

[0134] The change rate refers to the slope of the oxide content change curve.

[0135] The correlation score refers to the degree of influence of the change in polymer content on the change in oxide content.

[0136] The related threshold value can be adaptively configured according to the specific situation of the actual high molecular polymer and the change of the oxide content, ensuring that the actual high molecular polymer is completely measured for the oxide content by passing the related threshold value.

[0137] The oxide wastewater refers to wastewater after all the easily oxidizable substances in the wastewater are oxidized.

[0138] The initial oxide wastewater refers to oxide wastewater when some substances have not been completely oxidized.

[0139] The stability threshold is configured according to experimental test results of the oxide content stopping growth in a specific scenario.

[0140] Specifically, in the embodiment of the present invention, the conductivity of the pre-treated wastewater is first measured, and then sodium chloride is poured in so that the conductivity is between 1mS / cm-5mS / cm. Then an electrocatalytic oxidation operation is performed to obtain initial oxide wastewater. However, in order to determine the degree of oxidation in the initial oxide wastewater, it is necessary to measure it by nanocrystalline magnetic separation, and nanomagnetic separation also requires polymers as carriers of various ions. Excessive polymers cause the wastewater volume to increase, affecting the accuracy of oxide measurement. Too little polymers cause the oxides to be unable to be fully extracted, affecting the accuracy of oxide measurement. Therefore, controlling the amount of polymers is of great significance for measuring the oxide content.

[0141] Specifically, in an embodiment of the present invention, when the polymer is added at a uniform speed, the oxide measurement value should also gradually increase. When the polymer is added at a uniform speed, and the oxide measurement value increases slowly, it indicates that the carrier capacity of the polymer is redundant and the input can be reduced. Therefore, by calculating the correlation score between the addition rate and the oxide content change curve, the relationship between the polymer and the oxide can be roughly known. The correlation score is small, indicating that the polymer has little effect on the measurement of the oxide content, indicating that the COD and ammonia nitrogen in the initial oxide wastewater are basically oxidized, and the addition of the polymer can be stopped, so that the remaining polymer in the initial oxide wastewater can slowly extract the remaining oxide. When the rate of change of the oxide content change curve is less than the preset stability threshold, it indicates that no more oxides are produced in the initial oxide wastewater, and the initial oxide wastewater can be output as oxide wastewater.

[0142] In detail, in the embodiment of the present invention, the oxidation operation of the conductive standard wastewater to obtain initial oxide wastewater includes:

[0143] Using the anode plate pre-constructed in the electrochemical treatment equipment, according to a preset first control current, the conductive standard wastewater is directly oxidized to obtain primary oxide wastewater;

[0144] The electrode plates pre-constructed in the electrochemical treatment equipment are used to generate a strong oxidant according to a preset second control current, and the primary oxide wastewater is oxidized by the strong oxidant to obtain initial oxide wastewater, wherein the electrode plates include the anode plates.

[0145] Wherein, the primary oxide wastewater and the initial oxide wastewater are contained in the oxide wastewater.

[0146] Specifically, in the embodiment of the present invention, the process of electrochemical treatment of wastewater mainly relies on the redox reaction of the electrode, which can be divided into two mechanisms: direct oxidation and indirect oxidation.

[0147] Among them, pollutants such as ammonia and nitrogen are directly oxidized on the anode surface and decomposed into harmless substances. This reaction depends on the catalytic performance of the anode material. In the embodiment of the present invention, the anode plate can be made of lead dioxide (PbO 2 ), titanium-based coatings (such as RuO 2 、IrO 2 ) and other materials. Indirect oxidation is the process of producing strong oxidizing substances (such as Cl 2 , ClO - , O 3 , H 2 O 2 These oxidizing substances further react with pollutants to degrade COD and ammonia nitrogen.

[0148] Specifically, during the electrochemical treatment process of the present invention, the total current will be allocated to the direct electrocatalytic reaction and the indirect electrocatalytic reaction to obtain a first control current and a second control current. Among them, the first control current is determined by the rate at which the pollutants are directly oxidized or reduced on the electrode surface. If the electrode surface catalytic activity is strong and the pollutant concentration is high, the direct electrocatalytic current contribution will be large. The second control current is determined by the rate of electrochemical generation of intermediate active substances (such as hydroxyl radicals, hypochlorous acid, etc.). If the generation and consumption rate of the intermediate active substances in the system is high, the indirect electrocatalytic current contribution will be large.

[0149] In detail, in the embodiment of the present invention, the oxide content of the initial oxide wastewater is detected to obtain an oxide content change curve, including:

[0150] Adjusting the pH value of the initial oxide wastewater to be neutral to obtain neutral oxide wastewater;

[0151] Using a pre-constructed ultraviolet-visible absorption spectrum, the soluble oxides are identified in the neutral oxide wastewater to obtain a soluble oxide concentration content sequence;

[0152] Using a pre-constructed X-ray diffraction spectrum, solid oxides are identified in the neutral oxide wastewater to obtain a solid oxide mass content sequence;

[0153] The oxide content variation curve is calculated based on the soluble oxide concentration content sequence and the solid oxide mass content sequence, and the pre-constructed oxidation equivalent factors of each oxide.

[0154] The neutral pH adjustment refers to adjusting the pH value to 6-8, which helps to reduce the impact of acidity and alkalinity on the instrument and analysis results.

[0155] The neutral oxide wastewater refers to the wastewater whose H value is adjusted to 6-8.

[0156] Wherein, the ultraviolet-visible absorption spectrum (UV-Vis) is a kind of method suitable for detecting hypochlorite. Chlorate Nitrates The spectral technology of isosoluble oxides has the advantages of being fast, economical and highly sensitive.

[0157] The X-ray diffraction spectrum (XRD) is a method suitable for determining the crystal structure and main components (such as Fe 2 O 3 、MnO 2 The spectral technology of different crystal forms, etc., has the advantage of being able to accurately identify oxides of different crystal forms.

[0158] Specifically, in the embodiment of the present invention, the concentration sequence of soluble oxides can be measured by the UV-visible absorption spectrum, wherein the concentration sequence of soluble oxides refers to the concentration sequence of each oxide type in the solution.

[0159] Furthermore, the present invention obtains a solid oxide mass content sequence through X-ray diffraction spectrum, wherein the solid oxide mass content sequence comprises a sequence of masses of various solid oxide types.

[0160] In the embodiment of the present invention, due to different data units and types of oxide substances, the soluble oxide concentration content sequence and the solid oxide mass content sequence cannot be simply superimposed directly, and it is necessary to calculate the oxide content variation curve based on the oxidation equivalent factor of each oxide.

[0161] The oxidation equivalent factor refers to the value of stoichiometric analysis based on the molecular formula of the oxide. For example: ClO - The oxidation equivalence factor of NO is 0.5. 3 - The oxidation equivalence factor is 0.25.

[0162] In detail, in the embodiment of the present invention, the calculation of the oxide content variation curve according to the soluble oxide concentration content sequence and the solid oxide mass content sequence, and the pre-constructed oxidation equivalent factors of each oxide, includes:

[0163] According to the pre-constructed oxidation equivalent factors of each oxide and the soluble oxide concentration content sequence, the liquid oxide oxygen concentration is calculated, wherein the liquid oxide oxygen concentration is expressed as:

[0164]

[0165] In the formula, represents the oxygen concentration of liquid oxide, N represents the total number of dissolved oxide types in the dissolved oxide concentration content sequence, C i represents the concentration of the ith soluble oxide category, P i represents the oxidation equivalent factor of the i-th soluble oxide category;

[0166] According to the oxidation equivalent factors of the respective oxides and the solid oxide mass content sequence, the solid oxide oxygen content is calculated, wherein the solid oxide oxygen content is expressed as:

[0167]

[0168] In the formula, represents the oxygen content of the solid oxide, M represents the total number of solid oxide types in the solid oxide mass content sequence, and D i represents the mass content of the ith solid oxide, K i represents the oxidation equivalence factor of the ith solid oxide category, where K i and P i All belong to the oxidation equivalent factors of the respective oxides;

[0169] The wastewater volume of the neutral oxide wastewater is obtained, and the solid oxide oxygen concentration corresponding to the solid oxide oxygen content is calculated according to the wastewater volume, wherein the solid oxide oxygen concentration is expressed as:

[0170]

[0171] In the formula, represents the oxygen concentration of solid oxide, and L represents the volume of the wastewater;

[0172] The oxygen concentration of the solid oxide and the oxygen concentration of the liquid oxide are summed and calculated to obtain the oxide content;

[0173] The oxide content at each time point during the uniform addition process is recorded to obtain an oxide content variation curve.

[0174] Specifically, in the embodiments of the present invention, liquid phase analysis is usually based on volume, so the The unit is mgO 2 / L. Among them, Q 2 is the oxygen concentration, and y represents the liquid. Solid phase analysis is usually based on mass, with the unit being mg O 2 .in, m 2 represents the mass of oxygen and g represents solid.

[0175] Specifically, after the liquid and solid oxide contents are determined in the embodiment of the present invention, the total oxide content of the wastewater is calculated. It is necessary to pay attention to the uniformity of the units, and therefore, the concentration of the solid oxide oxygen content needs to be calculated according to the volume of the wastewater, so that the solid oxide oxygen concentration and the liquid oxide oxygen concentration are summed to obtain the oxide content.

[0176] The oxygen concentration of the liquid oxide refers to the concentration of oxygen in the liquid oxide, rather than the concentration of the substance itself.

[0177] The oxygen content of the solid oxide refers to the mass of the oxygen content in the solid oxide, rather than the mass of the substance itself.

[0178] Finally, the oxide content at each time point during the uniform addition process is recorded to obtain an oxide content variation curve.

[0179] In detail, in the embodiment of the present invention, the calculation of the correlation score between the addition rate and the oxide content change curve includes:

[0180] Calculating the rate of change of the oxide content change curve to obtain a first rate of change;

[0181] Calculating the difference in value between the adding speed and the first changing rate to obtain a correlation difference;

[0182] The change rate of the correlation difference is calculated to obtain a second change rate, and the second change rate is inversely proportional to obtain a correlation score.

[0183] The first change rate refers to the slope of the oxide content change curve.

[0184] The numerical difference refers to the difference calculated numerically after normalizing the data to the same order of magnitude through normalization or other operations, without considering the unit, and the difference result is named as correlation difference.

[0185] The second change rate refers to the slope of the correlation difference during the change process.

[0186] The inverse ratio refers to an algorithm in which the numerator is 1 and the second change rate is the denominator.

[0187] Specifically, in the embodiment of the present invention, the addition speed is set to a uniform speed by default, and the oxide content change curve also increases at a uniform speed when the high molecular polymer is just added. Therefore, the first change rate is a constant value, and the numerical difference between the addition speed and the first change rate, that is, the correlation difference is also a constant value, and the second change rate is 0. By inverse proportion, the correlation score is infinite. When the oxide content change curve decreases, the second change rate is not zero, and the correlation score is reduced by inverse proportion. When the correlation score is reduced to a certain extent, such as the correlation threshold, it indicates that the addition of the high molecular polymer has little effect on the extraction of the oxide content.

[0188] S5. Performing an oxide separation operation on the oxide wastewater to obtain wastewater to be discharged, and performing a content detection of preset substance types on the wastewater to be discharged to obtain a wastewater composition table.

[0189] Wherein, the oxide separation operation is completed by the above-mentioned nanocrystalline magnetic separation equipment, which refers to the separation operation of various oxides in the oxide wastewater.

[0190] Among them, the preset substance types include ammonia nitrogen, COD, arsenic and fluorine.

[0191] The wastewater to be discharged is wastewater that can be directly discharged or discarded or used for other purposes.

[0192] The wastewater composition table refers to a table that records the concentration of each substance in the wastewater.

[0193] Specifically, in the embodiment of the present invention, the wastewater to be discharged is obtained by a nanocrystalline magnetic separation device, and then the contents of ammonia nitrogen, COD, arsenic and fluorine are obtained by titration and colorimetry to obtain a wastewater composition table. Among them, titration and colorimetry are some easy-to-operate detection methods, which will not be described in detail here.

[0194] S6. Determine whether the wastewater composition table meets the preset target level emission standard.

[0195] The target emission standard is at least higher than the Class A emission standard in the pre-constructed pollutant emission standard for urban sewage treatment plants.

[0196] The COD in the wastewater composition table of the present invention is stabilized to below 50 mg / L; the ammonia nitrogen is stabilized to below 5 mg / L. In the pretreatment process, the arsenic is stabilized to below 0.1 mg / L; the fluorine is stabilized to below 10 mg / L, which meets the Class A emission standard in the "Pollutant Emission Standard for Urban Sewage Treatment Plants".

[0197] When the wastewater composition table does not meet the target level emission standard, the wastewater to be discharged is introduced into the electrochemical treatment equipment for re-filtration until the wastewater composition table meets the target level emission standard.

[0198] Among them, the more purified wastewater to be discharged and the wastewater to be discharged that meets the target emission standards can be discharged together, or stored together in a pre-constructed recovery pool for the production of fresh water and acid-base solutions.

[0199] In the embodiment of the present invention, when the tungsten ore raw material of the tungsten smelter changes, resulting in a drastic change in the wastewater content, the wastewater can be filtered again to meet the treatment standards.

[0200] When the wastewater composition table belongs to the target level emission standard, S7, obtaining wastewater to be discharged that meets the target level emission standard.

[0201] Specifically, in the embodiment of the present invention, the wastewater to be discharged can be discharged, and the wastewater can also be recycled.

[0202] In detail, in the embodiment of the present invention, after obtaining the wastewater to be discharged that meets the target level discharge standard, the method further includes:

[0203] Using a pre-constructed double alkali method to precipitate calcium and magnesium ions in the oxide wastewater to obtain double alkali softened wastewater;

[0204] Using a pre-constructed nanofiltration device, the double-alkali softened wastewater is subjected to a salt separation operation to obtain a divalent salt water and a monovalent salt water;

[0205] Using a pre-built reverse osmosis device to reverse osmosis the monovalent salt water to obtain fresh water and concentrated salt water of a preset concentration;

[0206] Using a pre-built double-membrane electrodialysis device, the concentrated brine is dialyzed to obtain an acid solution and an alkaline solution;

[0207] The fresh water is stored, the divalent salt water is discharged, and the acid solution and the alkaline solution are stored, and the acid-base solution with a preset ratio in the stored acid solution and the alkaline solution is obtained, and the acid-base solution is transported to the pretreatment equipment and the electrochemical treatment equipment.

[0208] The double alkali method is a chemical precipitation method used for sewage treatment, which is mainly used to remove pollutants such as heavy metal ions dissolved in water. It usually uses two alkaline substances, such as sodium hydroxide (NaOH) and calcium hydroxide (Ca(OH) 2 ) to increase the pH value of the water and thus promote the precipitation reaction.

[0209] Wherein, the calcium and magnesium ion precipitation refers to the removal of calcium ions and magnesium ions in wastewater.

[0210] The double alkali softened wastewater refers to wastewater from which calcium and magnesium ions have been removed.

[0211] Among them, the nanofiltration (NF) in the nanofiltration equipment refers to a membrane separation technology between ultrafiltration and reverse osmosis, and the filtration accuracy is usually around 1 nanometer (nm). The nanofiltration membrane can intercept multivalent salts (such as Ca 2+ Mg 2 + etc.), heavy metal ions, etc., while allowing some monovalent salts (such as Na + , Cl - ) and small molecules (such as water molecules) pass through.

[0212] The salt separation refers to the separation of different types of salts.

[0213] The monovalent salt water refers to salt water dissolved in water and mainly containing monovalent cations.

[0214] The divalent salt water refers to salt water dissolved in water and mainly containing divalent cations.

[0215] Among them, reverse osmosis (RO) in the reverse osmosis equipment is a membrane separation technology based on a semipermeable membrane, which is used to make water molecules in the solution pass through the membrane by applying a pressure higher than the osmotic pressure of the solution, while impurities such as dissolved salts, heavy metal ions, and particles are retained, thereby achieving the purpose of purifying or concentrating the water quality.

[0216] Herein, the fresh water can be understood as pure water.

[0217] Among them, the preset concentration is related to the subsequent wastewater recovery process, goals, etc., and can be adjusted according to the specific recovery cost situation.

[0218] Among them, the double membrane electrodialysis (Two-Membrane Electrodialysis, referred to as TMED) in the double membrane electrodialysis equipment is a separation technology based on ion exchange membrane and electric field action. It drives the directional migration of ions by electric field to achieve separation, concentration, recovery or desalination of salt and other ions.

[0219] Wherein, the alkaline solution is liquid alkali.

[0220] Wherein, the acid solution is hydrochloric acid.

[0221] Among them, the preset ratio is 20%.

[0222] The acid-base solution is the abbreviation of acid solution and alkaline solution.

[0223] Specifically, in an embodiment of the present invention, when the wastewater to be discharged that meets the standards of electrochemical sewage treatment enters the wastewater recovery process, the calcium and magnesium ions can be removed by the double alkali method, and the effluent from the pre-constructed double alkali softening clarification tank enters the nanofiltration device for salt separation, and the divalent salt water produced can be discharged, and the monovalent salt water produced can enter the reverse osmosis device for concentration, and the TDS is concentrated to 6-7%. At the same time, the reverse osmosis device can prepare fresh water and enter the pre-constructed pure water system. The concentrated salt water produced by reverse osmosis enters the bipolar membrane electrodialysis device to prepare an acid solution and an alkaline solution, and the prepared 20% acid solution and alkaline solution are returned to the pretreatment and electrochemical treatment process for use, realizing a closed-loop circulation. Among them, the TDS represents total dissolved solids, which is the abbreviation of Total Dissolved Solids, and refers to the total amount of all solid substances dissolved in the wastewater. The wastewater discharged in the end is greatly reduced, greatly reducing environmental risks.

[0224] The present invention is to solve the problem described in the background technology. The present invention first removes arsenic and fluorine in workshop wastewater through pretreatment equipment to obtain pretreated wastewater. In the pretreatment process, some metal ions precipitated by acidity and alkalinity can be effectively removed by adjusting the pH value. Then, through the principle of electrocatalytic oxidation, COD and ammonia nitrogen are directly electrocatalytically oxidized by gaining and losing electrons on the surface of the plate through the plate, and COD and ammonia nitrogen can also be indirectly oxidized by strong oxidants generated by electrolysis, thereby reducing COD and ammonia nitrogen. In the electrotreatment process, only the current and residence time need to be adjusted without adding other agents, which eliminates secondary pollution, saves wastewater treatment costs, and improves environmental protection. Therefore, the present invention can improve the purification level of tungsten smelting wastewater and reduce wastewater treatment costs.

[0225] like Figure 3 1 is a functional module diagram of an electrochemical treatment system based on tungsten smelting wastewater detection provided by one embodiment of the present invention.

[0226] The electrochemical treatment system 100 based on tungsten smelting wastewater detection of the present invention can be installed in an electronic device. According to the functions implemented, the electrochemical treatment system 100 based on tungsten smelting wastewater detection can include a pretreatment module 101 and an electrochemical treatment module 102. The module of the present invention can also be called a unit, which refers to a series of computer program segments that can be executed by an electronic device processor and can complete fixed functions, which are stored in the memory of the electronic device.

[0227] The pretreatment module 101 is used to obtain workshop wastewater from a tungsten smelter, and use a pre-constructed pretreatment device to perform a filtering control operation based on arsenic and fluorine on the workshop wastewater to obtain pretreated wastewater, and detect the arsenic and fluorine component values ​​in the pretreated wastewater, and determine whether the arsenic and fluorine component values ​​are greater than a preset pretreatment qualified standard, and when the arsenic and fluorine component values ​​are greater than the pretreatment qualified standard, introduce the pretreated wastewater into the pretreatment device for re-filtration until the arsenic and fluorine component values ​​are less than or equal to the pretreatment qualified standard;

[0228] The electrochemical treatment module 102 is used for, when the arsenic-fluorine component value is less than or equal to the pretreatment qualified standard, using the pre-constructed electrochemical treatment equipment, to perform an electrocatalytic oxidation operation based on COD and ammonia nitrogen on the pre-treated wastewater to obtain oxide wastewater, and to perform an oxide separation operation on the oxide wastewater to obtain wastewater to be discharged, and to perform a content detection of preset substance types on the wastewater to be discharged to obtain a wastewater composition table, and to determine whether the wastewater composition table belongs to the preset target level emission standard, and when the wastewater composition table does not belong to the target level emission standard, to introduce the wastewater to be discharged into the electrochemical treatment equipment for re-filtration until the wastewater composition table belongs to the target level emission standard, and when the wastewater composition table belongs to the target level emission standard, to obtain wastewater to be discharged that meets the target level emission standard.

[0229] In detail, the modules in the electrochemical treatment system 100 based on tungsten smelting wastewater detection in the embodiment of the present invention are used in the same manner as above. Figure 1 The electrochemical treatment method based on tungsten smelting wastewater detection described in the invention has the same technical means and can produce the same technical effects, so it will not be repeated here.

[0230] like Figure 4 1 is a schematic diagram of the structure of an electronic device for implementing an electrochemical treatment method based on tungsten smelting wastewater detection provided by one embodiment of the present invention.

[0231] The electronic device 1 may include a processor 10, a memory 11 and a bus 12, and may also include a computer program stored in the memory 11 and executable on the processor 10, such as an electrochemical treatment method program based on tungsten smelting wastewater detection.

[0232] Among them, the memory 11 includes at least one type of readable storage medium, and the readable storage medium includes flash memory, mobile hard disk, multimedia card, card-type memory (for example: SD or DX memory, etc.), magnetic memory, disk, optical disk, etc. The memory 11 may be an internal storage unit of the electronic device 1 in some embodiments, such as a mobile hard disk of the electronic device 1. The memory 11 may also be an external storage device of the electronic device 1 in other embodiments, such as a plug-in mobile hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (SecureDigital, SD) card, a flash card (Flash Card), etc. equipped on the electronic device 1. Further, the memory 11 also includes an internal storage unit of the electronic device 1 and an external storage device. The memory 11 can not only be used to store application software and various types of data installed in the electronic device 1, such as the code of the electrochemical treatment method program based on tungsten smelting wastewater detection, but also can be used to temporarily store data that has been output or is to be output.

[0233] The processor 10 may be composed of an integrated circuit in some embodiments, for example, a single packaged integrated circuit, or a plurality of packaged integrated circuits with the same or different functions, including one or more central processing units (CPUs), microprocessors, digital processing chips, graphics processors, and combinations of various control chips, etc. The processor 10 is the control core (Control Unit) of the electronic device, and uses various interfaces and lines to connect various components of the entire electronic device, and executes or executes programs or modules stored in the memory 11 (for example, an electrochemical treatment method program based on tungsten smelting wastewater detection, etc.), and calls data stored in the memory 11 to execute various functions of the electronic device 1 and process data.

[0234] The bus 12 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The bus 12 may be divided into an address bus, a data bus, a control bus, etc. The bus 12 is configured to realize connection and communication between the memory 11 and at least one processor 10, etc.

[0235] Figure 4 Only an electronic device with components is shown, and those skilled in the art will understand that Figure 4The structure shown does not constitute a limitation on the electronic device 1, and may include fewer or more components than shown in the figure, or combine certain components, or arrange the components differently.

[0236] For example, although not shown, the electronic device 1 may also include a power source (such as a battery) for supplying power to each component. Preferably, the power source may be logically connected to the at least one processor 10 through a power management device, so that the power management device can realize functions such as charging management, discharging management, and power consumption management. The power source may also include any components such as one or more DC or AC power sources, recharging devices, power failure detection circuits, power converters or inverters, power status indicators, etc. The electronic device 1 may also include a variety of sensors, Bluetooth modules, Wi-Fi modules, etc., which will not be repeated here.

[0237] Furthermore, the electronic device 1 may also include a network interface. Optionally, the network interface may include a wired interface and / or a wireless interface (such as a WI-FI interface, a Bluetooth interface, etc.), which is generally used to establish a communication connection between the electronic device 1 and other electronic devices.

[0238] Optionally, the electronic device 1 may further include a user interface, which may be a display, an input unit (such as a keyboard), or a standard wired interface or a wireless interface. Optionally, in some embodiments, the display may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, and an OLED (Organic Light-Emitting Diode) touch device. The display may also be appropriately referred to as a display screen or a display unit, which is used to display information processed in the electronic device 1 and to display a visual user interface.

[0239] The electrochemical treatment method program based on tungsten smelting wastewater detection stored in the memory 11 of the electronic device 1 is a combination of multiple instructions. When running in the processor 10, it can achieve:

[0240] Obtain workshop wastewater from tungsten smelters;

[0241] Using pre-built pretreatment equipment, the workshop wastewater is subjected to arsenic and fluorine-based filtering control operations to obtain pre-treated wastewater, and the arsenic and fluorine component values ​​in the pre-treated wastewater are detected;

[0242] Determining whether the arsenic and fluorine component values ​​are greater than a preset pretreatment qualification standard;

[0243] When the arsenic and fluorine content value is greater than the pretreatment qualified standard, the pretreated wastewater is introduced into the pretreatment equipment for re-filtration until the arsenic and fluorine content value is less than or equal to the pretreatment qualified standard;

[0244] When the arsenic-fluorine component value is less than or equal to the pretreatment qualified standard, the pretreated wastewater is subjected to an electrocatalytic oxidation operation based on COD and ammonia nitrogen using a pre-constructed electrochemical treatment device to obtain oxide wastewater;

[0245] Performing an oxide separation operation on the oxide wastewater to obtain wastewater to be discharged, and performing a content detection of a preset substance type on the wastewater to be discharged to obtain a wastewater composition table;

[0246] Determine whether the wastewater composition table meets the preset target level emission standards;

[0247] When the wastewater composition table does not meet the target level discharge standard, the wastewater to be discharged is introduced into the electrochemical treatment device for re-filtration until the wastewater composition table meets the target level discharge standard;

[0248] When the wastewater composition table belongs to the target level emission standard, wastewater to be discharged that meets the target level emission standard is obtained.

[0249] Specifically, the specific implementation method of the processor 10 for the above instructions can refer to Figures 1 to 4 The description of the relevant steps in the corresponding embodiments will not be repeated here.

[0250] Furthermore, if the module / unit integrated in the electronic device 1 is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. The computer-readable storage medium can be volatile or non-volatile. For example, the computer-readable medium can include: any entity or device capable of carrying the computer program code, a recording medium, a USB flash drive, a mobile hard disk, a magnetic disk, an optical disk, a computer memory, and a read-only memory (ROM).

[0251] The present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor of an electronic device, the computer program can implement:

[0252] Obtain workshop wastewater from tungsten smelters;

[0253] Using pre-built pretreatment equipment, the workshop wastewater is subjected to arsenic and fluorine-based filtering control operations to obtain pre-treated wastewater, and the arsenic and fluorine component values ​​in the pre-treated wastewater are detected;

[0254] Determining whether the arsenic and fluorine component values ​​are greater than a preset pretreatment qualification standard;

[0255] When the arsenic and fluorine content value is greater than the pretreatment qualified standard, the pretreated wastewater is introduced into the pretreatment equipment for re-filtration until the arsenic and fluorine content value is less than or equal to the pretreatment qualified standard;

[0256] When the arsenic-fluorine component value is less than or equal to the pretreatment qualified standard, the pretreated wastewater is subjected to an electrocatalytic oxidation operation based on COD and ammonia nitrogen using a pre-constructed electrochemical treatment device to obtain oxide wastewater;

[0257] Performing an oxide separation operation on the oxide wastewater to obtain wastewater to be discharged, and performing a content detection of a preset substance type on the wastewater to be discharged to obtain a wastewater composition table;

[0258] Determine whether the wastewater composition table meets the preset target level emission standards;

[0259] When the wastewater composition table does not meet the target level discharge standard, the wastewater to be discharged is introduced into the electrochemical treatment device for re-filtration until the wastewater composition table meets the target level discharge standard;

[0260] When the wastewater composition table belongs to the target level emission standard, wastewater to be discharged that meets the target level emission standard is obtained.

[0261] In the several embodiments provided by the present invention, it should be understood that the disclosed devices, systems and methods can be implemented in other ways. For example, the system embodiments described above are only illustrative, and actual implementation may have other division methods.

[0262] The modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0263] In addition, each functional module in each embodiment of the present invention may be integrated into one processing unit, each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of hardware plus software functional modules.

[0264] It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

[0265] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. An electrochemical treatment method based on tungsten smelting wastewater detection, characterized in that: The method comprises: Obtain workshop wastewater from tungsten smelters; Using pre-built pretreatment equipment, the workshop wastewater is subjected to arsenic and fluorine-based filtering control operations to obtain pre-treated wastewater, and the arsenic and fluorine component values ​​in the pre-treated wastewater are detected; Determining whether the arsenic and fluorine component values ​​are greater than a preset pretreatment qualification standard; When the arsenic and fluorine content value is greater than the pretreatment qualified standard, the pretreated wastewater is introduced into the pretreatment equipment for re-filtration until the arsenic and fluorine content value is less than or equal to the pretreatment qualified standard; When the arsenic-fluorine component value is less than or equal to the pretreatment qualified standard, the pretreated wastewater is subjected to an electrocatalytic oxidation operation based on COD and ammonia nitrogen using a pre-constructed electrochemical treatment device to obtain oxide wastewater; Performing an oxide separation operation on the oxide wastewater to obtain wastewater to be discharged, and performing a content detection of a preset substance type on the wastewater to be discharged to obtain a wastewater composition table; Determine whether the wastewater composition table meets the preset target level emission standards; When the wastewater composition table does not meet the target level discharge standard, the wastewater to be discharged is introduced into the electrochemical treatment device for re-filtration until the wastewater composition table meets the target level discharge standard; When the wastewater composition table belongs to the target level emission standard, wastewater to be discharged that meets the target level emission standard is obtained.

2. The electrochemical treatment method based on tungsten smelting wastewater detection according to claim 1 is characterized in that: The pre-constructed pre-treatment equipment is used to perform a filtering control operation based on arsenic and fluorine on the workshop wastewater to obtain pre-treated wastewater, including: Using pre-constructed pretreatment equipment and pre-constructed calcium salt to perform primary sedimentation on the workshop wastewater to obtain arsenic-removed wastewater; Using pre-constructed iron salt to perform sedimentation operation on the arsenic removal wastewater to obtain deep arsenic removal wastewater; Performing an acid-base metal ion precipitation operation on the deep arsenic removal wastewater to obtain primary pretreated wastewater; The pre-constructed complex defluoridation agent is used to carry out a fluoride ion complex precipitation operation on the primary pre-treated wastewater according to a preset pH environment to obtain pre-treated wastewater.

3. The electrochemical treatment method based on tungsten smelting wastewater detection according to claim 2 is characterized in that: The pre-constructed electrochemical treatment equipment is used to perform an electrocatalytic oxidation operation based on COD and ammonia nitrogen on the pre-treated wastewater to obtain oxide wastewater, including: Using a pre-constructed electrochemical treatment device, the conductivity of the pre-treated wastewater is detected, and the conductivity of the pre-treated wastewater is adjusted to a preset suitable range according to the pre-constructed electrolyte to obtain conductive standard wastewater; Performing an oxidation operation on the conductive standard wastewater to obtain initial oxide wastewater, adding the initial oxide wastewater at a uniform speed using a pre-constructed high molecular polymer according to a preset adding speed, and detecting the oxide content of the initial oxide wastewater during the uniform adding process to obtain an oxide content change curve; Calculating a correlation score between the addition rate and the oxide content variation curve; When the correlation score is less than a preset correlation threshold, the use of the pre-constructed high molecular polymer is stopped, the initial oxide wastewater is added at a uniform speed according to a preset addition speed, and the rate of change of the oxide content change curve is identified; When the rate of change of the oxide content change curve is less than a preset stability threshold, the initial oxide wastewater is used as oxide wastewater.

4. The electrochemical treatment method based on tungsten smelting wastewater detection according to claim 3 is characterized in that: The step of performing an oxidation operation on the conductive standard wastewater to obtain initial oxide wastewater comprises: Using the anode plate pre-constructed in the electrochemical treatment equipment, according to a preset first control current, the conductive standard wastewater is directly oxidized to obtain primary oxide wastewater; The electrode plates pre-constructed in the electrochemical treatment equipment are used to generate a strong oxidant according to a preset second control current, and the primary oxide wastewater is oxidized by the strong oxidant to obtain initial oxide wastewater, wherein the electrode plates include the anode plates.

5. The electrochemical treatment method based on tungsten smelting wastewater detection according to claim 4 is characterized in that: The step of detecting the oxide content of the initial oxide wastewater to obtain an oxide content variation curve comprises: Adjusting the pH value of the initial oxide wastewater to be neutral to obtain neutral oxide wastewater; Using a pre-constructed ultraviolet-visible absorption spectrum, the neutral oxide wastewater is subjected to soluble oxide identification to obtain a soluble oxide concentration content sequence; Using a pre-constructed X-ray diffraction spectrum, solid oxides are identified in the neutral oxide wastewater to obtain a solid oxide mass content sequence; The oxide content variation curve is calculated based on the soluble oxide concentration content sequence and the solid oxide mass content sequence, and the pre-constructed oxidation equivalent factors of each oxide.

6. The electrochemical treatment method based on tungsten smelting wastewater detection according to claim 5 is characterized in that: The calculation of the oxide content variation curve according to the soluble oxide concentration content sequence and the solid oxide mass content sequence, and the pre-constructed oxidation equivalent factors of each oxide, comprises: According to the pre-constructed oxidation equivalent factors of each oxide and the soluble oxide concentration content sequence, the liquid oxide oxygen concentration is calculated, wherein the liquid oxide oxygen concentration is expressed as: In the formula, represents the oxygen concentration of liquid oxide, N represents the total number of dissolved oxide types in the dissolved oxide concentration content sequence, C i represents the concentration of the ith soluble oxide category, P i represents the oxidation equivalent factor of the i-th soluble oxide category; According to the oxidation equivalent factors of the respective oxides and the solid oxide mass content sequence, the solid oxide oxygen content is calculated, wherein the solid oxide oxygen content is expressed as: In the formula, represents the oxygen content of the solid oxide, M represents the total number of solid oxide types in the solid oxide mass content sequence, and D i represents the mass content of the ith solid oxide, K i represents the oxidation equivalence factor of the ith solid oxide category, where K i and P i All belong to the oxidation equivalent factors of the respective oxides; The wastewater volume of the neutral oxide wastewater is obtained, and the solid oxide oxygen concentration corresponding to the solid oxide oxygen content is calculated according to the wastewater volume, wherein the solid oxide oxygen concentration is expressed as: In the formula, represents the oxygen concentration of solid oxide, and L represents the volume of the wastewater; The oxygen concentration of the solid oxide and the oxygen concentration of the liquid oxide are summed and calculated to obtain the oxide content; The oxide content at each time point during the uniform addition process is recorded to obtain an oxide content variation curve.

7. The electrochemical treatment method based on tungsten smelting wastewater detection according to claim 6 is characterized in that: The calculating the correlation score between the addition rate and the oxide content variation curve comprises: Calculating the rate of change of the oxide content change curve to obtain a first rate of change; Calculating the difference in value between the adding speed and the first changing rate to obtain a correlation difference; The change rate of the correlation difference is calculated to obtain a second change rate, and the second change rate is inversely proportional to obtain a correlation score.

8. The electrochemical treatment method based on tungsten smelting wastewater detection according to claim 7 is characterized in that: After obtaining the wastewater to be discharged that meets the target level discharge standard, the method further includes: Using a pre-constructed double alkali method to precipitate calcium and magnesium ions in the oxide wastewater to obtain double alkali softened wastewater; Using a pre-constructed nanofiltration device, the double-alkali softened wastewater is subjected to a salt separation operation to obtain a divalent salt water and a monovalent salt water; Using a pre-built reverse osmosis device to reverse osmosis the monovalent salt water to obtain fresh water and concentrated salt water of a preset concentration; Using a pre-built double-membrane electrodialysis device, the concentrated brine is dialyzed to obtain an acid solution and an alkaline solution; The fresh water is stored, the divalent salt water is discharged, and the acid solution and the alkaline solution are stored, and the acid-base solution with a preset ratio in the stored acid solution and the alkaline solution is obtained, and the acid-base solution is transported to the pretreatment equipment and the electrochemical treatment equipment.

9. The electrochemical treatment method based on tungsten smelting wastewater detection according to claim 8 is characterized in that: After the pretreated wastewater is introduced into the pretreatment equipment for re-filtration, the method further comprises: Performing magnitude statistics on the pretreated wastewater returned to the pretreatment device to obtain a wastewater circulation flow value, and monitoring the wastewater circulation flow value to obtain a wastewater circulation flow curve; Using a pre-trained pretreatment feeding control model, according to the wastewater circulation flow curve, control parameters of the pretreatment equipment are predicted to obtain a set of predicted pretreatment control parameters; According to the predicted pretreatment control parameter set, the parameters of the pretreatment equipment are updated to obtain an updated wastewater circulation flow curve, wherein the updated wastewater circulation flow curve remains within a preset flow limit range.

10. An electrochemical treatment system based on tungsten smelting wastewater detection, characterized in that: The system comprises: A pretreatment module, for obtaining workshop wastewater of a tungsten smelter, and using a pre-constructed pretreatment device to perform a filtering control operation based on arsenic and fluorine on the workshop wastewater to obtain pretreated wastewater, and detecting the arsenic and fluorine component values ​​in the pretreated wastewater, and determining whether the arsenic and fluorine component values ​​are greater than a preset pretreatment qualified standard, and when the arsenic and fluorine component values ​​are greater than the pretreatment qualified standard, introducing the pretreated wastewater into the pretreatment device for re-filtration until the arsenic and fluorine component values ​​are less than or equal to the pretreatment qualified standard; The electrochemical treatment module is used for, when the arsenic-fluorine component value is less than or equal to the pretreatment qualified standard, using the pre-constructed electrochemical treatment equipment, to perform an electrocatalytic oxidation operation based on COD and ammonia nitrogen on the pre-treated wastewater to obtain oxide wastewater, and to perform an oxide separation operation on the oxide wastewater to obtain wastewater to be discharged, and to detect the content of preset substance types on the wastewater to be discharged to obtain a wastewater composition table, and to determine whether the wastewater composition table belongs to the preset target level emission standard, and when the wastewater composition table does not belong to the target level emission standard, the wastewater to be discharged is introduced into the electrochemical treatment equipment for re-filtration until the wastewater composition table belongs to the target level emission standard, and when the wastewater composition table belongs to the target level emission standard, the wastewater to be discharged that meets the target level emission standard is obtained.

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