Triple box system capable of quickly softening circulating cooling water

Abstract

The invention belongs to the technical field of industrial circulating water softening, and relates to a triple box system capable of quickly softening circulating cooling water, which comprises an electrochemical reaction tank and an electric flocculation reaction tank, a net-shaped DSA anode and a porous cathode are arranged in the electrochemical reaction tank, an inner cavity is formed in the porous cathode, a plurality of cathode holes are formed in the wall of the inner cavity of the porous cathode and communicated with the inside and the outside of a cylinder of the porous cathode, and a water inlet of a water pump of the electric flocculation reaction tank is formed in the top of the inner cavity of the porous cathode; an electric flocculation system anode and an electric flocculation system cathode are arranged in the electric flocculation reaction tank, and a water outlet of the water pump is positioned at the bottom of the electric flocculation reaction tank; the flocculating constituent formed in the electric flocculation process is used for providing nucleation sites for scale-forming ions in alkaline effluent generated in the pre-process, the nucleation, growth and precipitation processes of the scale-forming ions are effectively accelerated, the working efficiency is improved, the use of chemicals is avoided, and the influence of chemical reagents on the environment is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of industrial circulating water softening, and relates to a triple-tank system capable of rapidly softening circulating cooling water. Background Art

[0002] With the continuous acceleration of urbanization and industrialization in my country, the consumption of fresh water in industries such as steel, metallurgy, electricity and chemical industry has increased significantly, resulting in an increasingly prominent contradiction between water supply and demand. Promoting clean production, improving the recycling rate of water resources, and reducing the water consumption and emissions of enterprises are important paths for enterprises to achieve sustainable development. At present, most enterprises adopt an open circulation cooling system, the main feature of which is that it is in contact with air during the circulation of cooling water. The recycling of this cooling water causes the water to evaporate continuously and the salt substances to gradually concentrate, which in turn causes scaling and corrosion problems of heat exchange equipment, thereby reducing the safety of industrial circulating water. As a major water user in the industrial field, the stable operation of the circulating cooling water system plays a vital role in ensuring the safety and stable production of enterprises. Therefore, how to effectively treat industrial circulating water has become one of the important issues that enterprises and society need to solve urgently.

[0003] Common circulating water quality control technologies in the prior art are mainly divided into three categories: chemical method, physical method and physicochemical method. The application of chemical method in circulating water treatment mainly includes chemical reagent method and limestone softening method. Chemical reagent method can be divided into two categories: inorganic scale inhibitor and organic scale inhibitor, and the scale inhibition mechanism of the two is different. Inorganic scale inhibitors act on the active points on the surface of crystals through functional groups or electrostatic forces in their molecules, thereby inhibiting the growth of crystals, maintaining the microcrystalline state, increasing their solubility, and ultimately achieving scale inhibition effect. In contrast, organic scale inhibitors prevent scaling by slowing down crystal growth and promoting crystal distortion. Although these technologies are currently the most widely used options, they cannot fundamentally eliminate hardness ions in water, but only delay the scaling process. In addition, phosphorus-containing scale inhibitors may cause eutrophication of water bodies after discharge, which also limits their production and application.

[0004] The limestone softening method is to mix quicklime (CaO) with water to produce calcium hydroxide, which is then added to the makeup water to react calcium and magnesium salts with carbon dioxide to form calcium carbonate and magnesium hydroxide precipitates. This method can effectively remove most of the carbonate hardness and some iron and silicon compounds in the makeup water. The above three methods all rely on the solubility or chemical equilibrium principles to control the scaling process. However, the scaling risk is not eradicated because there are still ions that cause scaling in the circulating water, so it can be regarded as a passive technology.

[0005] The application of physical methods in circulating water treatment mainly includes mechanical cleaning and ultrasonic technology. Among them, the mechanical cleaning method takes rubber ball cleaning technology as an example. The specific operation is to put the running rubber ball into the circulating water side of the condenser. The rubber ball enters the copper tube of the condenser with the water flow and is cleaned by friction with the inner wall of the copper tube. However, this cleaning method has the disadvantages of complex operation, long cycle and incomplete descaling. In addition, improper operation may damage the protective film on the surface of the heat exchanger tube, causing corrosion and damage to the equipment and pipelines.

[0006] Ultrasonic technology uses the propagation characteristics of sound waves above 20kHz in liquids for cleaning. The specific operation is to generate sound waves through an ultrasonic generator, which propagate in the liquid and form cavitation. The rapid expansion and contraction of cavitation bubbles releases a strong impact force, thereby effectively removing dirt and sediment on the surface of the equipment. However, this cleaning method has disadvantages such as uneven cleaning, possible damage to materials, and high equipment costs. In addition, ultrasonic cleaning has high requirements on the properties and temperature of the cleaning fluid, and has poor adaptability in certain extreme environments.

[0007] Physical and chemical methods include membrane filtration, electrocoagulation, and electrochemical water softening technology. Membrane filtration technology covers treatment processes such as reverse osmosis, nanofiltration, and electrodialysis. It is based on natural or synthetic polymer films and uses external energy or chemical potential difference as a driving force to separate, classify, purify, and enrich binary or multi-component solutes and solvents, so that the softened water can be used as feed water for the circulating water system. The significant advantages of the membrane method include no need for a large amount of chemical reagents, no phase change, low energy consumption, simple separation equipment, easy operation, small footprint, and high hardness removal efficiency. However, membrane fouling and high membrane material costs are the main obstacles, which limit its widespread application, and the service life of the membrane is relatively short.

[0008] Electroflocculation technology uses soluble anodes (such as magnesium, aluminum and iron anodes) to react with hydroxide (OH-) to generate metal cations, forming highly active and adsorbent metal hydroxide colloidal flocculants. These flocculants can effectively remove colloids, suspended solids, soluble pollutants, bacteria and viruses by forming larger flocculants. The generation of OH- increases the pH value at the cathode interface, which helps to remove hardness ions and dissolved silica. Compared with traditional methods, electroflocculation does not require additional chemical reagents, generates very few pollutants and does not produce brine discharge. Therefore, it is regarded as an eco-friendly green technology suitable for effective circulating cooling water treatment.

[0009] Electrochemical water softening technology is a typical active treatment technology. Its biggest advantage is that it can remove hardness ions from circulating cooling water in the form of solid precipitation without adding chemical reagents, thereby effectively preventing the formation of scale. This technology precipitates hardness ions to form scale in the cathode area, while organic matter and microorganisms react in the anode area to generate strong oxidizing substances, causing organic matter to be oxidized and microorganisms to die or inactivate. The anode can also achieve alkalinity removal. This technology can keep the surface of the heat exchanger clean, increase the concentration ratio of circulating water, reduce the discharge of polluted wastewater, effectively save water resources, comply with the national policy orientation of the ecological and environmental protection industry, and has huge market potential.

[0010] The traditional treatment method for softening industrial circulating cooling water is the triple-tank process, also known as the physicochemical method. This process mainly treats circulating cooling water through a series of relatively simple physical or chemical reactions such as neutralization, precipitation and flocculation.

[0011] However, after the existing three-tank process is treated by physical and chemical methods, the water quality of the wastewater is unstable and a large amount of Ca2+ remains in the water. 2+ Mg 2+ Plasma also has the following disadvantages:

[0012] 1. Secondary pollution problem

[0013] Traditional treatment methods rely on chemical reagents. The precipitates generated during the treatment process may contain heavy metals and other harmful substances. If not handled properly, it may cause secondary pollution. In addition, the continuous purchase and use of chemical reagents leads to increased operating costs.

[0014] 2. The precipitation time is too long

[0015] In the homogeneous nucleation process of hardness ions in traditional processes and general electrochemical processes, the spontaneous sedimentation rate is slow, resulting in incomplete calcium hardness deposition in the effluent, extending the overall treatment cycle, reducing the system treatment efficiency and increasing the operating cost.

[0016] 3.H + OH - Low separation efficiency

[0017] The OH produced by electrolysis - It is mainly concentrated near the interface layer on the cathode surface, and the H generated by the anode + OH diffuses into the cathode - Neutralization, resulting in OH - A lot of waste and low utilization rate limit the effect of electrochemical water softening.

[0018] Therefore, a circulating water treatment device or treatment method with less secondary pollution, higher efficiency and environmental protection is needed to solve the above technical problems. Summary of the invention

[0019] The technical solution adopted by the present invention to solve the technical problem is: a three-tank system capable of rapidly softening circulating cooling water, comprising: an electrochemical reaction cell, an electric flocculation reaction cell;

[0020] A cylindrical mesh DSA anode is provided in the electrochemical reaction cell, a cylindrical porous cathode is provided in the cylinder of the mesh DSA anode, an inner cavity is provided inside the porous cathode, a plurality of cathode holes are provided on the inner cavity wall of the porous cathode to connect the inside and outside of the cylinder of the porous cathode, a cathode pump water suction hole is provided on the top of the inner cavity of the porous cathode, that is, the water inlet of the water pump of the electric flocculation reaction cell; a water inlet of the water pump is provided in the inner cavity of the porous cathode, a cathode water outlet hole is provided on the top of the porous cathode, and a water inlet of the water pump is provided in the cathode water outlet hole; the mesh DSA anode is electrically connected to the positive pole of a DC power supply, and the porous cathode is electrically connected to the negative pole of the DC power supply;

[0021] An electric flocculation system anode and an electric flocculation system cathode are arranged in the electric flocculation reaction tank, the electric flocculation system anode is electrically connected to the positive electrode of a DC power supply, and the electric flocculation system cathode is electrically connected to the negative electrode of the DC power supply;

[0022] The water outlet of the water pump is located at the bottom of the electric flocculation reaction tank.

[0023] Preferably, the triple-tank system further comprises a raw water inlet tank; an electrochemical reaction tank inlet provided at the upper portion of the left side wall of the electrochemical reaction tank is connected to the raw water inlet tank, an overflow port is provided at the upper portion of the side wall of the electrochemical reaction tank, and the overflow port is connected to the inlet of the raw water inlet tank through an overflow pipe; the height of the overflow port is higher than the height of the mesh DSA anode;

[0024] A water outlet is arranged on the upper part of the side wall of the electro-flocculation reaction tank, and the height of the water outlet is higher than the height of the anode and the cathode of the electro-flocculation system.

[0025] Preferably, the bottom of the electrochemical reaction cell and the electro-flocculation reaction cell are respectively provided with a downwardly protruding funnel-shaped concave bottom; the concave bottom is used to store Ca 2+ Mg 2+ Supersaturate the sediment and remove it regularly.

[0026] Preferably, the anode of the electro-flocculation system and the cathode of the electro-flocculation system are in the form of plates parallel to each other, and the water outlet of the water pump is located between the anode of the electro-flocculation system and the cathode of the electro-flocculation system.

[0027] Preferably, the preparation materials of the mesh DSA anode include: titanium-based coating anode, boron-doped diamond, titanium-coated platinum anode.

[0028] More preferably, the titanium-based coated anode includes: iridium oxide IrO2, ruthenium oxide RuO2, and tantalum oxide Ta2O5.

[0029] Preferably, the porous cathode is made of materials including stainless steel, titanium-based materials, aluminum and nickel.

[0030] More preferably, the titanium-based material includes: a titanium electrode and a titanium-coated electrode.

[0031] Preferably, the materials used to prepare the anode of the electro-flocculation system include: aluminum, iron, magnesium, and zinc.

[0032] Preferably, the cathode pore has a diameter ranging from 50 micrometers to 15 millimeters. Electrochemical reactions can be achieved when the cathode pore diameter is within the range of 50 micrometers to 15 millimeters, and higher acid-base separation efficiency can be achieved after stabilization.

[0033] The beneficial effects of the present invention are:

[0034] 1. The present invention utilizes the flocs formed in the electro-flocculation process to provide nucleation sites for the scaling ions in the alkaline effluent produced by the pre-process, thereby effectively accelerating the nucleation, growth and precipitation process of the scaling ions, overcoming the limitation of the slow precipitation rate of the traditional electrochemical process, and realizing the efficient and rapid softening of the circulating cooling water, thereby improving the work efficiency; therefore, the present invention shortens the treatment cycle of the circulating water and improves the overall treatment efficiency of the circulating water.

[0035] 2. The present invention adopts electrochemical and electrocoagulation processes to avoid the use of chemicals, reduce the impact of chemical reagents on the environment, realize the recycling of cooling water, alleviate the problem of water shortage, and reduce the cost of wastewater treatment. Therefore, the present invention improves the sustainability and economic benefits of the circulating water treatment system and has a more environmentally friendly and efficient treatment effect.

[0036] 3. The present invention can improve the automation level of the equipment by accurately controlling various parameters of the equipment during operation (such as current density, water inlet flow rate, etc.), making the operation more convenient and the degree of automation higher, and is suitable for industrial automation and large-scale treatment of circulating water. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a process flow diagram of a triple-tank system capable of rapidly softening circulating cooling water according to the present invention;

[0038] Figure 2 It is the operation mechanism diagram of the present invention;

[0039] Figure 3 is a bar graph comparing the hardness removal rates of the present invention and the prior art;

[0040] Figure 4 It is a line chart comparing the effluent turbidity of the present invention and the single pump electrochemical process.

[0041] In the figure, 1. raw water inlet pool; 2. DC power supply; 3. electrochemical reaction cell; 4. mesh DSA anode; 5. porous cathode; 6. water pump; 7. electro-flocculation reaction cell; 8. electro-flocculation system anode; 9. electro-flocculation system cathode. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the relevant technologies in the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] refer to Figures 1 to 4 In this embodiment, the three-tank system that can quickly soften the circulating cooling water mainly includes two parts: hardness removal and accelerated precipitation. Each part is coupled in series by a pump-suction cathode electrochemical system and an electric flocculation system.

[0044] Among them, the hardness removal system includes: a raw water inlet tank 1, a DC power supply 2, an electrochemical reaction tank 3, a mesh DSA anode 4, a porous cathode 5, and a water pump 6. In the hardness removal system, the electrochemical reaction tank 3 is connected to the raw water inlet tank 1, and an anode 4 is installed inside the electrochemical reaction tank 3. A porous cathode 5 is arranged inside the anode 4. The anode 4 is connected to the positive electrode of the DC power supply 2, and the porous cathode 5 is connected to the negative electrode of the DC power supply 2. The upper outlet of the electrochemical reaction tank 3 is also connected to the inlet of the water inlet tank 1, and the overflow water in the electrochemical reaction tank 3 flows back to the raw water inlet tank 1. The water pump 6 pumps the cathode effluent of the electrochemical system into the subsequent electro-flocculation reaction tank 7 by pumping the porous cathode 5.

[0045] The incoming water first passes through the hardness system to raise the pH value of the pumped water to between 11.0 and 11.5 to achieve Ca 2+ Mg 2+ Oversaturated precipitation, a small amount of sediment settles into the bottom funnel, which is discharged and cleaned regularly. Then the cathode effluent in the hardness removal system is connected to the electric flocculation reaction tank 7 from the bottom. The water flows through the electric flocculation device and flows out from its upper clarification area. The sediment settles into the bottom funnel and is discharged and cleaned regularly, thereby quickly and efficiently removing Ca in the water. 2+ Mg 2+ .

[0046] like Figure 2 As shown, the core process principle of the present invention is to absorb a large amount of OH generated by the porous cathode during the electrolysis process through a water pump. -and combines it with the H generated at the anode + Separation, avoiding the neutralization reaction between the two, thereby increasing OH - The utilization efficiency of the water is improved to form an alkaline solution, which provides favorable conditions for the homogeneous nucleation of scaling ions, thereby improving the softening efficiency of the system. In the electrochemical process, the pumped alkaline solution is transported to the flocculation tank. During the electroflocculation process, floccules are generated by electrolysis, providing nucleation sites, and further inducing Ca 2+ and Mg 2+ Rapid crystallization nucleation generates CaCO3 and Mg(OH)2 crystals. As these calcium and magnesium products are continuously generated and attached, the crystals gradually grow larger, accelerating the precipitation process of scaling ions, and eventually forming large-particle precipitates and being discharged, thereby reducing the hardness of the water. The three-tank system integrating electrochemistry and electroflocculation can achieve rapid and efficient softening of circulating cooling water. In this process, the solution that is not sucked out is heated by the H generated by the anode. + The pH value will drop slightly, but the total amount of solution is relatively small, so the overflow water can flow back to the water inlet tank 1 and continue to be treated after mixing with the raw water.

[0047] This embodiment can effectively integrate the advantages of the two processes and achieve complementary advantages by using a triple box of electrochemical and electro-flocculation processes. The electrochemical process provides the alkalinity environment required for circulating water softening, while the electro-flocculation process provides nucleation sites for the precipitation of scale ions in water, thereby accelerating the precipitation process. This method not only reduces the use of chemicals, but also reduces the risk of secondary environmental pollution caused by chemicals. In addition, the integrated application of the two processes effectively solves the problem of slow precipitation rate of traditional electrochemical processes and significantly improves the efficiency of circulating water softening.

[0048] The traditional triple-tank technology is mainly based on the design of dosing technology, while this implementation is specifically designed for the integrated application of electrochemical and electro-flocculation processes. Compared with traditional technology, this implementation has a significant improvement in the degree of automation. By simply adjusting the operating parameters of the equipment (such as current density, water inlet flow rate and pump suction ratio), precise system control can be achieved, thereby reducing operational complexity and making the system easier to operate. This improvement not only reduces the difficulty of workers' operation, but also significantly improves the work efficiency of the system.

[0049] In this embodiment, the electrochemical and electro-flocculation cathode materials can be stainless steel, titanium-based materials (titanium electrodes, titanium-coated electrodes), aluminum, and nickel. The electrochemical anode materials can be titanium-based coated anodes (such as iridium oxide (IrO2), ruthenium oxide (RuO2), tantalum oxide (Ta2O5)), boron-doped diamond, and titanium-coated platinum anodes. The electro-flocculation anode materials can be aluminum, iron, magnesium, and zinc.

[0050] Prevent electrochemical reaction H+ OH - Alternative methods for neutralization include the use of ion exchange membranes, polytetrafluoroethylene membranes, and nylon meshes to prevent the H generated by electrolysis. + OH - Electrochemical technology for neutralization. Accelerated precipitation: Adding coagulants, filtering and crystallization devices (filled with activated carbon, diatomaceous earth, perlite, cellulose, activated alumina, resin particles) can be used.

[0051] Example

[0052] Example 1

[0053] (1) The hardness of circulating cooling water is 400 mg / L, of which calcium hardness is 300 mg / L, magnesium hardness is 100 mg / L, and alkalinity is 230 mg / L.

[0054] (2) Electrochemical system: anode 4 uses DSA electrode, cathode 5 uses stainless steel porous cathode, current density is 14 mA / cm 2 , the electrolysis time is 7h; the anode 8 of the electrocoagulation system adopts an aluminum electrode; the cathode 9 adopts a stainless steel cathode, and the current density is 16mA / cm 2 , electrolysis time is 7h;

[0055] (3) Circulating cooling water enters from the water inlet on the upper side wall of the electrochemical reaction cell 3 and is electrolyzed in the electrochemical reaction cell 3. When the circulating cooling water fills the electrochemical reaction cell 3, part of the circulating cooling water overflows from the upper side of the reaction cell, and the other part is pumped out from the top of the porous cathode 5 by the water pump 6. The overflowed electrolyte will flow back to the water inlet tank 1 and mix with the raw water for treatment. At this time, the water inlet flow rate of the electrochemical reaction cell 3 is 3600mL / h, and the pumping flow rate of the water pump 6 is 1200mL / h. The pumped electrolyte enters the electrocoagulation reaction cell 7. The water flow enters from the lower side of the electrocoagulation reaction cell 7 and flows out from the upper part. In the process, the hardness of the water and the change of turbidity over time are measured.

[0056] Comparative Example 1: Traditional electrochemical solution

[0057] (1) The hardness of the circulating water is 400 mg / L, of which the calcium hardness is 300 mg / L, the magnesium hardness is 100 mg / L, and the alkalinity is 230 mg / L.

[0058] (2) Electrochemical system: anode 4 uses DSA electrode, cathode 5 uses stainless steel cathode, current density is 14 mA / cm 2 , electrolysis time is 7h;

[0059] (3) Circulating cooling water enters from the water inlet on the upper side of the electrochemical reaction cell 3 and is electrolyzed in the reaction cell. When the circulating cooling water fills the electrochemical reaction cell 3, the circulating cooling water overflows from the upper side of the reaction cell, and the hardness of the overflow water is measured after it has been left to stand for 3 hours.

[0060] The results are as follows Figure 3 As shown, after treatment, it was found that the hardness removal rate of the pumped water in the embodiment was relatively high, reaching 88.75%, achieving a high removal rate of calcium and magnesium ions, while the hardness removal rate in Comparative Example 1 was only 33% when no pumping was performed, and homogeneous precipitation of up to 3 hours was required, making it difficult to achieve efficient removal of calcium and magnesium ions.

[0061] Comparative Example 2: Pumping electrochemical process (without electrocoagulation)

[0062] (1) The hardness of the circulating water is 400 mg / L, of which the calcium hardness is 300 mg / L, the magnesium hardness is 100 mg / L, and the alkalinity is 230 mg / L.

[0063] (2) Electrochemical system: anode 4 uses DSA electrode, cathode 5 uses stainless steel porous cathode, current density is 14 mA / cm 2 , electrolysis time is 7h;

[0064] (3) Circulating cooling water enters from the water inlet on the upper side wall of the electrochemical reaction cell 3 and is electrolyzed in the reaction cell. When the circulating cooling water fills the electrochemical reaction cell 3, part of the circulating cooling water overflows from the upper side of the reaction cell, and the other part is pumped out from the top of the porous cathode 5 by the water pump 6. The turbidity of the pumped water changes with time.

[0065] The results are as follows Figure 4 As shown, after treatment, it was found that the turbidity of the pumped water in the embodiment decreased rapidly with the increase of time, and could be reduced to 30NTU within 5 minutes, and finally stabilized at about 20NTU, realizing the rapid precipitation of calcium and magnesium ions. However, in Comparative Example 2, when the pump-suction electrochemical process (without electrocoagulation) was adopted, the turbidity decreased slowly with the increase of time, and only decreased to 84NTU after 60 minutes, making it difficult to achieve the rapid removal of calcium and magnesium ions.

[0066] In summary, the present invention utilizes the floccules formed in the electroflocculation process to provide nucleation sites for the scaling ions in the alkaline effluent produced by the pre-process, thereby effectively accelerating the nucleation, growth and precipitation process of the scaling ions, overcoming the limitation of the traditional electrochemical process with a slow precipitation rate, and achieving efficient and rapid softening of the circulating cooling water, thereby improving work efficiency. In addition, the present invention simultaneously adopts electrochemical and electroflocculation processes, thereby avoiding the use of chemicals and reducing the impact of chemical reagents on the environment.

[0067] It should be emphasized that the above are only preferred embodiments of the present invention and do not limit the present invention in any form. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A triple tank system capable of rapidly softening circulating cooling water, characterized in that: include: Electrochemical reaction cell (3), electrocoagulation reaction cell (7); The electrochemical reaction cell (3) is provided with a cylindrical mesh DSA anode (4), the cylinder of the mesh DSA anode (4) is provided with a cylindrical porous cathode (5), the porous cathode (5) is provided with an inner cavity, the inner cavity wall of the porous cathode (5) is provided with a plurality of cathode holes connecting the inside and outside of the cylinder of the porous cathode (5), and the inner cavity of the porous cathode (5) is provided with a water inlet of a water pump (6); the mesh DSA anode (4) is electrically connected to the positive electrode of a DC power supply (2), and the porous cathode (5) is electrically connected to the negative electrode of the DC power supply (2); The electro-flocculation reaction tank (7) is provided with an electro-flocculation system anode (8) and an electro-flocculation system cathode (9), wherein the electro-flocculation system anode (8) is electrically connected to the positive electrode of the DC power supply (2), and the electro-flocculation system cathode (9) is electrically connected to the negative electrode of the DC power supply (2); The water outlet of the water pump (6) is located at the bottom of the electric flocculation reaction tank (7).

2. A triple tank system capable of rapidly softening circulating cooling water according to claim 1, characterized in that: The triple-tank system further comprises a raw water inlet tank (1); an electrochemical reaction tank inlet provided on the upper portion of the left side wall of the electrochemical reaction tank (3) is connected to the raw water inlet tank (1); an overflow port is provided on the upper portion of the side wall of the electrochemical reaction tank (3); the overflow port is connected to the inlet of the raw water inlet tank (1) through an overflow pipe; A water outlet is provided on the upper portion of the side wall of the electro-flocculation reaction tank (7).

3. The triple-tank system for rapidly softening circulating cooling water according to claim 1 is characterized in that: The bottoms of the electrochemical reaction cell (3) and the electro-flocculation reaction cell (7) are respectively provided with a funnel-shaped concave bottom protruding downward.

4. The triple-tank system for rapidly softening circulating cooling water according to claim 1 is characterized in that: The anode (8) and cathode (9) of the electro-flocculation system are in the form of plates parallel to each other, and the water outlet of the water pump (6) is located between the anode (8) and cathode (9) of the electro-flocculation system.

5. The triple-tank system for rapidly softening circulating cooling water according to claim 1 is characterized in that: The preparation materials of the mesh DSA anode (4) include: titanium-based coating anode, boron-doped diamond, and titanium-coated platinum anode.

6. A triple tank system capable of rapidly softening circulating cooling water according to claim 5, characterized in that: The titanium-based coating anode includes: iridium oxide IrO2, ruthenium oxide RuO2, and tantalum oxide Ta2O5.

7. The triple-tank system capable of rapidly softening circulating cooling water according to claim 1, characterized in that: The porous cathode (5) is made of materials including stainless steel, titanium-based materials, aluminum and nickel.

8. A triple tank system capable of rapidly softening circulating cooling water according to claim 7, characterized in that: The titanium-based material includes: a titanium electrode and a titanium-coated electrode.

9. The triple-tank system capable of rapidly softening circulating cooling water according to claim 1, characterized in that: The materials used to prepare the anode (8) of the electro-flocculation system include: aluminum, iron, magnesium, and zinc.

10. The triple-tank system capable of rapidly softening circulating cooling water according to claim 1, characterized in that: The aperture of the cathode hole ranges from 50 micrometers to 15 millimeters.

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