Method and device for collecting and treating fire-fighting wastewater of electrochemical energy storage prefabricated cabin

Abstract

The invention relates to the technical field of electrochemical energy storage prefabricated cabins, in particular to a method and device for collecting and treating fire-fighting wastewater of an electrochemical energy storage prefabricated cabin, and the method comprises the following steps: carrying out reaction treatment on pollutants in first fire-fighting wastewater by utilizing an electric flocculation system to obtain second fire-fighting wastewater; monitoring pollutant indexes in the second fire-fighting wastewater, and evaluating the treatment effect of the electric flocculation system; and treating the second fire-fighting wastewater according to the evaluation result. Large particles and suspended solids in the fire-fighting wastewater are removed through the filtering step, so that the subsequent treatment difficulty and cost are reduced. The electric flocculation system is used for deeply treating pollutants in the wastewater, and the electric flocculation system is used as a core treatment unit and has the characteristics of high treatment speed and high efficiency. The flocculating constituent generated by the electrochemical reaction can effectively adsorb and remove various pollutants in the wastewater, so that the pollution risk of direct discharge of the wastewater to the environment is reduced, and the ecological environment is protected.

Description

Technical Field

[0001] The invention relates to the technical field of electrochemical energy storage prefabricated cabins, and specifically to a method and device for collecting and treating firefighting wastewater in electrochemical energy storage prefabricated cabins. Background Art

[0002] With the transformation of the global energy structure and the rapid development of renewable energy, electrochemical energy storage technology, as one of the key means to solve the imbalance between energy storage and supply, is receiving unprecedented attention and application. As an integrated energy storage system solution, electrochemical energy storage prefabricated cabins have great application potential in the fields of grid peak regulation, distributed energy access, and microgrid construction due to their advantages such as easy installation, simple maintenance, and flexible deployment. However, with the widespread application of electrochemical energy storage prefabricated cabins, their safety issues have become increasingly prominent, especially the fire risk and subsequent fire wastewater treatment issues.

[0003] In the electrochemical energy storage prefabricated cabin, the battery pack is the core energy storage component, which may cause fire under abnormal conditions such as overcharging, short circuit, thermal runaway, etc. In order to control the fire in time and protect the safety of surrounding facilities and personnel, advanced fire detection and automatic fire extinguishing systems are usually equipped. These systems can respond quickly in the early stage of the fire and extinguish the fire source through water-based methods.

[0004] However, when water-based fire extinguishing agents are used, a large amount of firefighting wastewater containing electrolytes, heavy metal ions and possible harmful chemicals will be generated. How to deal with this firefighting wastewater is an existing problem. Summary of the invention

[0005] (I) Purpose of the invention

[0006] The purpose of the present invention is to provide a method and device for collecting and treating firefighting wastewater in an electrochemical energy storage prefabricated cabin, which can improve the efficiency of treating firefighting wastewater in an electrochemical energy storage prefabricated cabin.

[0007] (II) Technical solution

[0008] In order to solve the above problems, the present invention provides a method for collecting and treating firefighting wastewater in an electrochemical energy storage prefabricated cabin, comprising:

[0009] collecting firefighting wastewater in the prefabricated cabin, filtering the firefighting wastewater, and obtaining first firefighting wastewater;

[0010] Monitor the pollutant indicators in the first fire-fighting wastewater;

[0011] Using an electric flocculation system, the pollutants in the first firefighting wastewater are subjected to reaction treatment to obtain second firefighting wastewater;

[0012] Monitor the pollutant indicators in the second fire-fighting wastewater, and evaluate the treatment effect of the electric flocculation system according to the changes between the pollutant indicators in the first fire-fighting wastewater and the pollutant indicators in the second fire-fighting wastewater;

[0013] The second fire-fighting wastewater is treated according to the evaluation results.

[0014] In another aspect of the present invention, preferably, the step of using an electric flocculation system to react and treat pollutants in the first firefighting wastewater to obtain the second firefighting wastewater comprises:

[0015] Calculate the current density of the electro-flocculation system according to the pollutant indexes in the first fire-fighting wastewater and the parameters of the electro-flocculation system;

[0016] Calculating the processing time of the electro-flocculation system according to the current density;

[0017] The reaction conditions of the electro-flocculation system are set according to the current density and the processing time of the electro-flocculation system.

[0018] In another aspect of the present invention, preferably, according to the pollutant index in the first fire-fighting wastewater and the parameters of the electrocoagulation system, calculating the current density of the electrocoagulation system comprises:

[0019]

[0020] Wherein, J represents the current density of the electro-flocculation system, A represents the electrode surface area of ​​the electro-flocculation system, F1(C) represents the influence function of the type and concentration of pollutants in the first fire-fighting wastewater on the current density, F2(PH) represents the influence function of the pH value of the first fire-fighting wastewater on the current density, C represents the type and concentration of pollutants, F3(T) represents the influence function of the temperature of the first fire-fighting wastewater on the current density; PH represents the pH value, and T represents the temperature.

[0021] In another aspect of the present invention, preferably, the influence function of the pollutant type and pollutant concentration in the first firefighting wastewater on the current density is:

[0022]

[0023] Among them, F1(C) represents the influence function of the pollutant type and pollutant concentration in the first fire wastewater on the current density, K i is the electrocoagulation reaction constant of the i-th pollutant in the first firefighting wastewater, n i is the electrocoagulation reaction order of the i-th pollutant in the first firefighting wastewater; C i represents the pollutant concentration, and N represents the total number of pollutant types in the first fire-fighting wastewater.

[0024] In another aspect of the present invention, preferably, the influence function of the pH value in the first firefighting wastewater on the current density is calculated using the following formula:

[0025] F2(PH)=10 γ·(PH-7)

[0026] Wherein F2(PH) represents the influence function of pH value in the first fire-fighting wastewater on current density, PH represents the pH value of the first fire-fighting wastewater, and γ is the empirical coefficient of pH value.

[0027] In another aspect of the present invention, preferably, the temperature influence function on current density is calculated using the following formula:

[0028]

[0029] Wherein, σ0 represents the reference conductivity, T represents the temperature of the first fire-fighting wastewater, T0 represents the reference temperature, and k represents the temperature coefficient.

[0030] In another aspect of the present invention, preferably, the treatment time of the electroflocculation system is calculated using the following formula:

[0031]

[0032] Where, t represents the treatment time of electrocoagulation, R target represents the preset target removal rate, V is the volume of the first fire wastewater, J is the current density, and x is the empirical coefficient of current density and removal rate.

[0033] In another aspect of the present invention, preferably, the evaluating the effect of the electrocoagulation system treatment comprises:

[0034] Calculate the removal rate of a single pollutant, and calculate the average removal rate of all pollutants based on the removal rate of the single pollutant;

[0035] If the average removal rate is greater than or equal to the preset target removal rate, the treatment effect of the electro-flocculation system is successful;

[0036] If the average removal rate is less than the preset target removal rate, the treatment effect of the electrocoagulation system is unsuccessful.

[0037] In another aspect of the present invention, preferably, the treating the second firefighting wastewater according to the evaluation result comprises:

[0038] If the treatment effect of the electric flocculation system is successful, the second fire-fighting wastewater is discharged;

[0039] If the treatment effect of the electric flocculation system is unsuccessful, the second fire-fighting wastewater continues to be treated with electric flocculation.

[0040] In another aspect of the present invention, preferably, a firefighting wastewater collection and treatment device for an electrochemical energy storage prefabricated cabin comprises:

[0041] Collection and filtration module: collects firefighting wastewater in the prefabricated cabin, filters the firefighting wastewater, and obtains first firefighting wastewater;

[0042] The first monitoring module: monitors the pollutant indicators in the first fire-fighting wastewater;

[0043] Electrocoagulation module: using the electrocoagulation system to react and treat the pollutants in the first firefighting wastewater to obtain the second firefighting wastewater;

[0044] The second monitoring module is used to monitor the pollutant index in the second fire-fighting wastewater, and to evaluate the effect of the treatment by the electric flocculation system according to the changes between the pollutant index in the first fire-fighting wastewater and the pollutant index in the second fire-fighting wastewater;

[0045] Evaluation and processing module: Treat the second fire-fighting wastewater according to the evaluation results.

[0046] (III) Beneficial effects

[0047] The above technical solution of the present invention has the following beneficial technical effects:

[0048] The present invention first removes large particles and suspended solids in firefighting wastewater through a filtering step, thereby reducing the difficulty and cost of subsequent treatment. Subsequently, the pollutants in the wastewater are deeply treated using an electrocoagulation system, which, as a core treatment unit, has the characteristics of fast processing speed and high efficiency. The floccules generated by the electrochemical reaction can effectively adsorb and remove a variety of pollutants in the wastewater, and can significantly reduce the content of harmful substances such as heavy metals and organic matter in the wastewater, thereby reducing the pollution risk of direct wastewater discharge to the environment and protecting the ecological environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 It is a schematic diagram of the overall process of an embodiment of the present invention. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0051] Obviously, the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0053] The present invention will be described in more detail below with reference to the accompanying drawings. In each of the accompanying drawings, the same elements are represented by similar reference numerals. For the sake of clarity, the various parts in the accompanying drawings are not drawn to scale.

[0054] Embodiment 1

[0055] A method for collecting and treating firefighting wastewater in an electrochemical energy storage prefabricated cabin, Figure 1 FIG. 1 shows a schematic diagram of the overall process of an embodiment of the present invention. Figure 1 As shown, including:

[0056] A method for collecting and treating firefighting wastewater in an electrochemical energy storage prefabricated cabin, comprising:

[0057] Collect the firefighting wastewater in the prefabricated cabin, filter the firefighting wastewater, and obtain the first firefighting wastewater; set up special wastewater collection devices inside or around the electrochemical energy storage prefabricated cabin, such as collection boxes, diversion troughs, etc., to ensure that the wastewater generated during the firefighting process can be collected in a timely and effective manner. The collection device must ensure the fluidity and collection efficiency of the first firefighting wastewater, and ensure that the firefighting wastewater in the prefabricated cabin can flow smoothly into the collection device to avoid overflow or leakage. The collected firefighting wastewater in the prefabricated cabin is first preliminarily filtered to remove large particles of impurities and suspended matter. This step can be achieved by setting up physical barriers such as filters and grilles to reduce the burden in the subsequent treatment process.

[0058] Monitor the pollutant indicators in the first firefighting wastewater; When monitoring the pollutant indicators in the first firefighting wastewater, the types and concentrations of pollutants concerned are diverse. These pollutants mainly come from the mixture of firefighting water and battery internal substances used in the electrochemical energy storage prefabricated cabin during fire fighting. The types of pollutants may include heavy metal ions, which come from the electrolyte, electrode materials, etc. in the battery, which may contain heavy metals such as lead, cadmium, nickel, and cobalt. Heavy metal ions are toxic and pose a threat to aquatic life and human health. Heavy metal ion monitoring can be carried out by inductively coupled plasma mass spectrometry (ICP-MS): It can detect multiple heavy metal elements at the same time and is suitable for quantitative analysis of low-concentration heavy metals. Atomic absorption spectroscopy (AAS): It is commonly used for the determination of single or multiple heavy metal elements and has high sensitivity and accuracy. Spectrophotometry: For certain heavy metal ions, such as lead, cadmium, etc., specific color developers can be used for spectrophotometric determination.

[0059] Organic pollutants come from organic solvents in battery electrolytes (such as ethylene carbonate, propylene carbonate, etc.), which may burn or decompose in a fire. Organic pollutants can cause eutrophication of water bodies, affect water quality, and cause damage to aquatic ecosystems. Organic pollutants can be monitored through gas chromatography-mass spectrometry (GC-MS): It is suitable for qualitative and quantitative analysis of volatile organic compounds and can accurately identify and measure organic pollutants in wastewater. Liquid chromatography-mass spectrometry (LC-MS): For non-volatile or thermally unstable organic pollutants, LC-MS is a more appropriate choice. Total organic carbon (TOC) analyzer: Although it cannot directly determine the type of organic pollutants, it can determine the total amount of organic carbon in wastewater as a reference for the degree of organic pollution.

[0060] Inorganic substances, such as salts and additives from batteries, may dissolve in water during a fire. These inorganic substances may have a certain impact on water quality, such as increasing water hardness and changing the ion balance of water. Inorganic substances can be monitored by ion chromatography (IC): suitable for the simultaneous determination of multiple inorganic anions and cations, such as chloride ions, sulfate ions, sodium ions, potassium ions, etc. Spectrophotometry: For certain specific inorganic substances, such as phosphates, nitrates, etc., spectrophotometry can be used for determination.

[0061] Or through online monitoring methods, online heavy metal analyzer: using electrochemical or optical principles, real-time monitoring of the concentration changes of heavy metal ions in wastewater. Online TOC analyzer: real-time determination of the total amount of organic carbon in wastewater, reflecting the degree of organic pollution. pH meter and conductivity meter: although they do not directly determine the type of pollutants, changes in pH and conductivity can indirectly reflect the chemical properties and water quality of wastewater.

[0062] The electro-flocculation system is used to react and treat the pollutants in the first fire-fighting wastewater to obtain the second fire-fighting wastewater; the electro-flocculation system applies an electric field to cause the colloidal particles and suspended matter in the wastewater to undergo electro-coagulation, forming larger flocs and settling them, thereby removing the pollutants in the wastewater. The electro-flocculation system has the advantages of high treatment efficiency, small footprint, and simple operation, and is suitable for treating wastewater containing multiple pollutants.

[0063] Monitor the pollutant indicators in the second fire-fighting wastewater, and evaluate the treatment effect of the electric flocculation system according to the changes between the pollutant indicators in the first fire-fighting wastewater and the pollutant indicators in the second fire-fighting wastewater; by evaluating the changes in the pollutant indicators, it can be determined whether the treatment effect of the electric flocculation system has reached the expected goal.

[0064] The second fire-fighting wastewater is treated according to the evaluation results.

[0065] In one embodiment of the present invention, further, the step of using the electric flocculation system to react and treat pollutants in the first firefighting wastewater to obtain the second firefighting wastewater comprises:

[0066] According to the pollutant indicators in the first fire-fighting wastewater and the parameters of the electroflocculation system, the current density of the electroflocculation system is calculated; first, a comprehensive water quality analysis of the first fire-fighting wastewater is required to determine the types and concentrations of the main pollutants, such as heavy metal ions (lead, cadmium, nickel, cobalt, etc.), organic pollutants (such as combustion or decomposition products of ethylene carbonate and propylene carbonate), inorganic salts, etc. The electrode materials used in the electroflocculation system (such as aluminum electrodes, iron electrodes or mixed metal electrodes), the configuration of the electrolytic cell, the power supply capacity, etc. are preset. Based on the types and concentrations of pollutants in the wastewater and the characteristics of the electroflocculation system, the appropriate current density is calculated. Current density is one of the key factors affecting the effect of electroflocculation, which determines the amount and rate of metal hydroxides produced during the electrolysis process.

[0067] According to the current density, the treatment time of the electro-flocculation system is calculated; after the current density is determined, the required electro-flocculation treatment time needs to be estimated according to the volume of the wastewater and the desired treatment effect (such as pollutant removal rate). The length of the treatment time directly affects the treatment effect and energy consumption cost.

[0068] The reaction conditions of the electro-flocculation system are set according to the current density and the processing time of the electro-flocculation system.

[0069] In one embodiment of the present invention, further, the current density is the intensity of the current passing through the unit electrode area, which directly affects the generation rate and distribution of metal hydroxides during the electro-flocculation process. A higher current density generally means a faster reaction rate, but it may also lead to increased energy consumption and excessive consumption of the electrode. The electrode surface area is a basic parameter in the calculation of current density. In the electro-flocculation system, the larger the surface area of ​​the electrode, the greater the current that can be carried in theory, but it will also increase the complexity and cost of the system. According to the pollutant indicators in the first fire-fighting wastewater and the parameters of the electro-flocculation system, the current density of the electro-flocculation system is calculated including:

[0070]

[0071] Among them, J represents the current density of the electroflocculation system, A represents the electrode surface area of ​​the electroflocculation system, F1(C) represents the influence function of the pollutant type and pollutant concentration in the first firefighting wastewater on the current density, F2(PH) represents the influence function of the pH value of the first firefighting wastewater on the current density, C represents the pollutant type and pollutant concentration, and F3(T) represents the influence function of the temperature of the first firefighting wastewater on the current density; PH represents the pH value, and T represents the temperature. Under different pH conditions, the morphology and stability of metal hydroxides will change, thereby affecting their adsorption and precipitation capabilities. Therefore, the F2(PH) function is used to adjust the current density to adapt to different pH conditions to ensure the efficient conduct of the electroflocculation process. Temperature is also an important factor affecting the electrochemical reaction rate. As the temperature increases, the electrochemical reaction rate will accelerate, but too high a temperature may also cause corrosion of the electrode material and increase energy consumption. The F3(T) function is used to adjust the current density according to the temperature of the wastewater to balance the treatment effect and energy consumption cost.

[0072] In another aspect of the present invention, preferably, the influence function of the pollutant type and pollutant concentration in the first firefighting wastewater on the current density is:

[0073]

[0074] Among them, F1(C) represents the influence function of the pollutant type and pollutant concentration in the first fire wastewater on the current density, K i is the electrocoagulation reaction constant of the i-th pollutant in the first firefighting wastewater, n i is the electrocoagulation reaction order of the i-th pollutant in the first firefighting wastewater; C iRepresents the pollutant concentration, and N represents the total number of pollutant types in the first fire wastewater. The overall impact of these pollutants on the current density is comprehensively evaluated by considering the electroflocculation reaction constant and reaction order of each pollutant, as well as the total number of pollutant types in the wastewater. The reaction rate and efficiency of each pollutant in the electroflocculation process are different, depending on its chemical properties, charge state, and interaction with the electrode material. The electroflocculation reaction constant is an empirical parameter used to describe the electroflocculation reaction rate or efficiency of the i-th pollutant under specific conditions. This parameter is usually obtained by experimental determination. The reaction order describes the degree of influence of the pollutant concentration on the electroflocculation reaction rate. In chemical reactions, the reaction rate is often related to the concentration of the reactants, and the reaction order quantifies this relationship. For the electroflocculation process, the removal efficiency of some pollutants increases significantly with the increase of their concentration (positive reaction order), while other pollutants may exhibit different behaviors (such as zero-order or negative reaction order). There may be many different types of pollutants in the wastewater, and each pollutant may have an impact on the choice of current density.

[0075] In one embodiment of the present invention, further, the influence function of the pH value in the first firefighting wastewater on the current density is calculated using the following formula:

[0076] F2(PH)=10 γ·(PH-7)

[0077] Wherein F2(PH) represents the influence function of pH value in the first fire-fighting wastewater on current density, PH represents the pH value of the first fire-fighting wastewater, and γ is the empirical coefficient of pH value.

[0078] In another aspect of the present invention, preferably, the temperature influence function on current density is calculated using the following formula:

[0079]

[0080] Wherein, σ0 represents the reference conductivity, T represents the temperature of the first fire-fighting wastewater, T0 represents the reference temperature, and k represents the temperature coefficient. The reference conductivity may be obtained at a temperature of 25 degrees Celsius.

[0081] In another aspect of the present invention, preferably, the treatment time of the electroflocculation system is calculated using the following formula:

[0082]

[0083] Where, t represents the treatment time of electrocoagulation, R targetrepresents the preset target removal rate, V is the volume of the first firefighting wastewater, J is the current density, and x is the empirical coefficient of current density and removal rate. The target removal rate refers to the desired degree of pollutant removal; a higher target removal rate means that a longer treatment time is required to achieve this standard. The preset target removal rate can be obtained by concentration. The empirical coefficient of current density and removal rate can be obtained through experiments.

[0084] In one embodiment of the present invention, further, the evaluating of the effect of the electrocoagulation system treatment includes:

[0085] Calculate the removal rate of a single pollutant, and calculate the average removal rate of all pollutants based on the removal rate of the single pollutant;

[0086] The removal rate of a single pollutant is usually calculated by comparing the concentration of the pollutant in the wastewater before and after treatment. Assume that the concentration of a pollutant before treatment is C initial The concentration after treatment is C final , then the removal rate of the pollutant is R i It can be calculated by the following formula:

[0087]

[0088] Here, R i represents the removal rate of the i-th pollutant.

[0089] Assume there are n pollutants, and the removal rate of each pollutant is R1, R2, …, R n , then the average removal rate of all pollutants R avg , can be calculated by the following formula:

[0090]

[0091] If the average removal rate is greater than or equal to the preset target removal rate, the treatment effect of the electro-flocculation system is successful;

[0092] If the average removal rate is less than the preset target removal rate, the treatment effect of the electrocoagulation system is unsuccessful.

[0093] The setting of the target removal rate should be based on the actual needs of wastewater treatment and discharge standards. Too high a target removal rate may increase the treatment cost and difficulty, while too low a target removal rate may not meet the requirements of subsequent treatment or discharge.

[0094] In another aspect of the present invention, preferably, the treating the second firefighting wastewater according to the evaluation result comprises:

[0095] If the treatment effect of the electric flocculation system is successful, the second fire-fighting wastewater is discharged;

[0096] If the treatment effect of the electro-flocculation system is unsuccessful, the second fire-fighting wastewater is further subjected to electro-flocculation treatment. The time and current density of the continued electro-flocculation can be calculated by the above method.

[0097] This embodiment first removes large particles and suspended solids in the firefighting wastewater through a filtration step, reducing the difficulty and cost of subsequent treatment. Subsequently, the pollutants in the wastewater are deeply treated using an electrocoagulation system. As a core treatment unit, the electrocoagulation system has the characteristics of fast processing speed and high efficiency. The floccules generated by electrochemical reactions can effectively adsorb and remove a variety of pollutants in the wastewater, and can significantly reduce the content of harmful substances such as heavy metals and organic matter in the wastewater, thereby reducing the pollution risk of direct wastewater discharge to the environment and protecting the ecological environment.

[0098] Embodiment 2

[0099] An electrochemical energy storage prefabricated cabin firefighting wastewater collection and treatment device, comprising:

[0100] Collection and filtration module: collects firefighting wastewater in the prefabricated cabin, filters the firefighting wastewater, and obtains first firefighting wastewater;

[0101] The first monitoring module: monitors the pollutant indicators in the first fire-fighting wastewater;

[0102] Electrocoagulation module: using the electrocoagulation system to react and treat the pollutants in the first firefighting wastewater to obtain the second firefighting wastewater;

[0103] The second monitoring module is used to monitor the pollutant index in the second fire-fighting wastewater, and to evaluate the effect of the treatment by the electric flocculation system according to the changes between the pollutant index in the first fire-fighting wastewater and the pollutant index in the second fire-fighting wastewater;

[0104] Evaluation and processing module: Treat the second fire-fighting wastewater according to the evaluation results.

[0105] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the appended claims, or the equivalent forms of such scope and boundaries.

[0106] The present invention has been described above with reference to the embodiments of the present invention. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. The scope of the present invention is defined by the appended claims and their equivalents. Without departing from the scope of the present invention, a person skilled in the art may make various substitutions and modifications, which should all fall within the scope of the present invention.

[0107] Although the embodiments of the present invention have been described in detail, it should be understood that the various changes, substitutions, and alterations could be made hereto without departing from the spirit and scope of the invention.

[0108] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A method for collecting and treating firefighting wastewater in an electrochemical energy storage prefabricated cabin, characterized in that: include: collecting firefighting wastewater in the prefabricated cabin, filtering the firefighting wastewater, and obtaining first firefighting wastewater; Monitor the pollutant indicators in the first fire-fighting wastewater; Using an electric flocculation system, the pollutants in the first firefighting wastewater are subjected to reaction treatment to obtain second firefighting wastewater; Monitor the pollutant indicators in the second fire-fighting wastewater, and evaluate the treatment effect of the electric flocculation system according to the changes between the pollutant indicators in the first fire-fighting wastewater and the pollutant indicators in the second fire-fighting wastewater; The second fire-fighting wastewater is treated according to the evaluation results.

2. The method for collecting and treating firefighting wastewater of a prefabricated electrochemical energy storage cabin according to claim 1 is characterized in that: The method of using the electric flocculation system to react and treat pollutants in the first firefighting wastewater to obtain the second firefighting wastewater comprises: Calculate the current density of the electro-flocculation system according to the pollutant indexes in the first fire-fighting wastewater and the parameters of the electro-flocculation system; Calculating the processing time of the electro-flocculation system according to the current density; The reaction conditions of the electro-flocculation system are set according to the current density and the processing time of the electro-flocculation system.

3. The method for collecting and treating firefighting wastewater of a prefabricated electrochemical energy storage cabin according to claim 2 is characterized in that: According to the pollutant index in the first fire-fighting wastewater and the parameters of the electro-flocculation system, the current density of the electro-flocculation system is calculated including: Wherein, J represents the current density of the electro-flocculation system, A represents the electrode surface area of ​​the electro-flocculation system, F1(C) represents the influence function of the type and concentration of pollutants in the first fire-fighting wastewater on the current density, F2(PH) represents the influence function of the pH value of the first fire-fighting wastewater on the current density, C represents the type and concentration of pollutants, F3(T) represents the influence function of the temperature of the first fire-fighting wastewater on the current density; PH represents the pH value, and T represents the temperature.

4. The method for collecting and treating firefighting wastewater of a prefabricated electrochemical energy storage cabin according to claim 3 is characterized in that: The influence function of the pollutant type and pollutant concentration in the first firefighting wastewater on the current density is: Among them, F1(C) represents the influence function of the pollutant type and pollutant concentration in the first fire wastewater on the current density, K i is the electrocoagulation reaction constant of the i-th pollutant in the first firefighting wastewater, n i is the electrocoagulation reaction order of the i-th pollutant in the first firefighting wastewater; C i represents the pollutant concentration, and N represents the total number of pollutant types in the first fire-fighting wastewater.

5. The method for collecting and treating firefighting wastewater of a prefabricated electrochemical energy storage cabin according to claim 4 is characterized in that: The influence function of the pH value in the first firefighting wastewater on the current density is calculated using the following formula: <h2 style=";text-align:left;direction:ltr">F2(PH) = 10<h2 style=";text-align:left;direction:ltr"> γ·(PH-7) Wherein F2(PH) represents the influence function of pH value in the first fire-fighting wastewater on current density, PH represents the pH value of the first fire-fighting wastewater, and γ is the empirical coefficient of pH value.

6. The method for collecting and treating firefighting wastewater of a prefabricated electrochemical energy storage cabin according to claim 4 is characterized in that: The temperature effect function on current density is calculated using the following formula: Wherein, σ0 represents the reference conductivity, T represents the temperature of the first fire-fighting wastewater, T0 represents the reference temperature, and k represents the temperature coefficient.

7. The method for collecting and treating firefighting wastewater of a prefabricated electrochemical energy storage cabin according to claim 6 is characterized in that: The treatment time of the electrocoagulation system is calculated using the following formula: Where, t represents the treatment time of electrocoagulation, R target represents the preset target removal rate, V is the volume of the first fire wastewater, J is the current density, and x is the empirical coefficient of current density and removal rate.

8. The method for collecting and treating firefighting wastewater of a prefabricated electrochemical energy storage cabin according to claim 1 is characterized in that: The evaluation of the effect of the electrocoagulation system treatment includes: Calculate the removal rate of a single pollutant, and calculate the average removal rate of all pollutants based on the removal rate of the single pollutant; If the average removal rate is greater than or equal to the preset target removal rate, the treatment effect of the electro-flocculation system is successful; If the average removal rate is less than the preset target removal rate, the treatment effect of the electrocoagulation system is unsuccessful.

9. The method for collecting and treating firefighting wastewater of a prefabricated electrochemical energy storage cabin according to claim 8 is characterized in that: The processing of the second firefighting wastewater according to the evaluation result includes: If the treatment effect of the electric flocculation system is successful, the second fire-fighting wastewater is discharged; If the treatment effect of the electric flocculation system is unsuccessful, the second fire-fighting wastewater continues to be treated with electric flocculation.

10. An electrochemical energy storage prefabricated cabin firefighting wastewater collection and treatment device, characterized in that: include: Collection and filtration module: collects firefighting wastewater in the prefabricated cabin, filters the firefighting wastewater, and obtains first firefighting wastewater; The first monitoring module: monitors the pollutant indicators in the first fire-fighting wastewater; Electrocoagulation module: using the electrocoagulation system to react and treat the pollutants in the first firefighting wastewater to obtain the second firefighting wastewater; The second monitoring module is used to monitor the pollutant index in the second fire-fighting wastewater, and to evaluate the effect of the treatment by the electric flocculation system according to the changes between the pollutant index in the first fire-fighting wastewater and the pollutant index in the second fire-fighting wastewater; Evaluation and processing module: Treat the second fire-fighting wastewater according to the evaluation results.

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