System and method for integrally treating inter-cooling water by using electrochemical process
By employing a baffled-type enhanced mass transfer electrochemical method in the intercooled water treatment system, and utilizing modified biochar materials and composite electrodes, efficient removal of SO42- and Fe3+ was achieved. This solved the problems of low treatment efficiency and complex structure of traditional equipment, and optimized the space utilization and energy consumption of the equipment.
Patent Information
- Application Number
- CN202511061154.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-30
- Publication Date
- 2025-11-07
AI Technical Summary
Existing electrochemical methods for treating chilled water suffer from low treatment efficiency, complex equipment, and insufficient electrode material performance, especially in the poor removal of SO42- and Fe3+.
An integrated electrochemical system with baffled mass transfer enhancement is adopted. A multi-stage electrochemical reaction unit is constructed by vertically alternating anode and cathode layers. Coal gangue modified straw biochar and microencapsulated calcium alginate-distillers' grains biochar composite material are used as electrodes. Combined with voltage drive from an external power source, the directional migration and removal of SO42- and Fe3+ are achieved.
It improves the removal efficiency of SO42- and Fe3+ in intercooled water, simplifies the equipment structure, reduces the footprint and operational complexity, and improves treatment effect and energy utilization efficiency.
Smart Images
Figure CN120903644A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application belongs to the technical field of intermediate cooling water treatment, and relates to a system and method for integrated treatment of intermediate cooling water by an electrochemical method. BACKGROUND
[0002] Intermediate cooling water (such as industrial circulating cooling water, intermediate wall heat exchange system drainage, etc.) is widely used in industrial production processes, but it often contains high concentrations of sulfate ions (SO4 2- ) and iron ions (Fe 3+ ) and other pollutants. These pollutants not only cause equipment fouling and corrosion, but also affect heat exchange efficiency, and even cause environmental pollution. Therefore, it is of great significance to develop efficient and economical intermediate cooling water treatment technology.
[0003] Currently, the treatment methods for intermediate cooling water mainly include chemical precipitation, ion exchange, membrane separation, and electrochemical methods. The chemical precipitation method forms a precipitate by adding reagents (such as lime, aluminum salt, etc.), but has the problems of large reagent consumption and high sludge production; the ion exchange method can selectively remove ions, but the resin is easily contaminated and the regeneration cost is high; the membrane separation method (such as reverse osmosis, nanofiltration, etc.) has good treatment effect, but membrane pollution and energy consumption limit its large-scale application.
[0004] The electrochemical method has attracted widespread attention in the field of wastewater treatment in recent years due to its high efficiency, cleanliness, and strong controllability. Traditional electrochemical water treatment equipment usually uses parallel plate electrodes or three-dimensional electrode structures, and drives pollutants to undergo oxidation-reduction reactions or adsorption removal on the electrode surface through an external electric field. However, the existing electrochemical equipment has the following problems: Low treatment efficiency: single-stage electrochemical reaction units have limited removal capacity for pollutants, especially for the synergistic removal of SO4 2- and Fe 3+ ; Complex equipment: multi-stage treatment systems usually require multiple reactors in series, which occupies a large area and is difficult to operate and maintain; Inadequate performance of electrode materials: traditional electrodes (such as graphite, metal oxides) have weak selective adsorption or catalytic capacity for specific pollutants, and are prone to passivation.
[0005] Therefore, it is urgent to develop an efficient and compact intermediate cooling water treatment system that can efficiently remove SO4 2- and Fe 3+ from intermediate cooling water and solve the problems of complex equipment and low treatment efficiency in traditional technology. SUMMARY
[0006] To solve the problems in the prior art, the application provides a system and method for integrally treating intercooling water by using an electrochemical method, which effectively removes SO4 2- and Fe 3 + by using the electrochemical method, and simplifies the structure of the equipment.
[0007] To achieve the above object, the application adopts the following technical scheme: In a first aspect, the application provides a system for integrally treating intercooling water by using an electrochemical method, which comprises a system shell, a first anode layer, a first cathode layer, a second anode layer and a second cathode layer being sequentially arranged from top to bottom along the vertical direction of the system shell, and a gap being arranged between adjacent anode layers and cathode layers; the anode layers are electrically connected to the positive electrode of an external power supply, and the cathode layers are electrically connected to the negative electrode of the external power supply. The first anode layer and the second anode layer are fixedly connected to the first inner wall of the system shell and have a gap between the first inner wall and the second inner wall of the system shell; the first cathode layer and the second cathode layer are fixedly connected to the second inner wall of the system shell and have a gap between the second inner wall and the first inner wall of the system shell. The upper portion of the second inner wall of the system shell is provided with an intercooling water inlet, which is in communication with the gap between the first anode layer and the first cathode layer; the lower portion of the first inner wall of the system shell is provided with an intercooling water outlet, which is in communication with the gap between the second anode layer and the second cathode layer; the first inner wall and the second inner wall are two inner walls arranged oppositely in the system shell.
[0008] Preferably, the anode layers are filled with coal gangue modified straw biochar materials.
[0009] Preferably, the preparation method of the coal gangue modified straw biochar material is as follows: The straw is crushed and then pyrolysis is carried out under anaerobic conditions to obtain straw biochar; The coal gangue is crushed and then ball milled to obtain coal gangue powder; The coal gangue powder and the straw biochar are mixed and then pyrolysis is carried out under anaerobic conditions, and the coal gangue modified straw biochar material is obtained after acid washing, washing, drying and the like.
[0010] Preferably, the mass ratio of the coal gangue powder and the straw biochar is 2:5.
[0011] Preferably, the cathode layers are filled with microcapsule-embedded calcium alginate-distiller's grain biochar composite materials.
[0012] Preferably, the preparation method of the micro-encapsulated calcium alginate-distiller's grains biochar composite material is as follows: The distiller's grains are dried and crushed, and then pyrolysis is carried out under anaerobic conditions to obtain the distiller's grains biochar. The sodium alginate suspension and the distiller's grains biochar are mixed to obtain a mixed solution; the mixed solution is dropped into a CaCl2 solution to carry out a solidification reaction, and after washing, freezing and drying, the micro-encapsulated calcium alginate-distiller's grains biochar composite material is obtained.
[0013] Preferably, the mass concentration of the sodium alginate suspension is 0.5% to 1.5%, and the mass ratio of the sodium alginate suspension to the distiller's grains biochar is (3 to 5):1.
[0014] Preferably, the voltage range of the external power supply is 3 to 8 V.
[0015] Preferably, the gap width between adjacent anode layers and cathode layers is equal.
[0016] In a second aspect, the present application provides a method for efficiently treating intercooling water by using electrochemical method, comprising the following steps: The intercooling water to be treated enters from the intercooling water inlet on the upper part of the inner wall of the second side of the system shell, and then flows through the gap between the first anode layer and the first cathode layer, the gap between the first cathode layer and the second anode layer, and the gap between the second anode layer and the second cathode layer in sequence; a voltage is applied by the external power supply, so that SO4 2- migrates to the anode layer and is adsorbed and removed, and Fe 3+ in the intercooling water migrates to the cathode layer and is reduced and removed; the treated intercooling water is discharged from the intercooling water outlet on the lower part of the first side inner wall.
[0017] Compared with the prior art, the present application has the following beneficial effects: The present application realizes the step-by-step removal of pollutants by constructing multi-stage electrochemical reaction units through the vertical and alternating arrangement of anode layers and cathode layers; through the symmetrical layout of the fixed connection of the anode layer with the first side inner wall and the fixed connection of the cathode layer with the second side inner wall, an "S"-shaped baffle type water flow channel is formed, and the hydraulic retention time is prolonged. The present application effectively removes SO4 2- and Fe 3+ in the intercooling water through electrochemical action combined with baffle type reinforced mass transfer, which not only ensures the treatment effect, but also simplifies the device structure, and effectively solves the problems of large occupied area and low treatment efficiency of traditional electrochemical water treatment equipment. BRIEF DESCRIPTION OF DRAWINGS
[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be considered as limiting the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.
[0019] Figure 1 A schematic diagram of a system for integrated treatment of intercooling water by electrochemical method according to the present application; Figure 2 Treatment effect of the system of the present application on SO4 2- and Fe 3+ in intercooling water under different direct current voltages.
[0020] 1, first anode layer; 2, first cathode layer; 3, second anode layer; 4, second cathode layer; 5, first side inner wall; 6, second side inner wall. DETAILED DESCRIPTION
[0021] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.
[0022] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.
[0023] It should be noted that: similar numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.
[0024] In the description of the embodiments of the present application, it should be noted that if the terms "upper", "lower", "horizontal", "inner" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is used, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.
[0025] In addition, if the term "horizontal" is used, it is not meant to require the component to be absolutely horizontal, but rather it can be slightly inclined. As such, the term "horizontal" is used to mean that the direction of the component is more horizontal than vertical, but it is not required to be perfect.
[0026] In the description of the embodiments of the present application, it should also be noted that, unless otherwise explicitly specified and limited, if the terms "set", "install", "connect", "connect" appear, they should be understood in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0027] The present application will be described in further detail below with reference to the accompanying drawings: The first object of the present application is to provide a system for integrated treatment of inter-cooling water by electrochemical method, as shown in Figure 1 The system shell is provided with a first anode layer 1, a first cathode layer 2, a second anode layer 3 and a second cathode layer 4 in sequence from top to bottom along the vertical direction of the system shell, and a gap is provided between adjacent anode layer and cathode layer; the anode layer is electrically connected to the positive electrode of the external power supply, and the cathode layer is electrically connected to the negative electrode of the external power supply; The first anode layer 1 and the second anode layer 3 are fixedly connected to the first side inner wall 5 of the system shell, and there is a gap between the first side inner wall 5 and the second side inner wall 6 of the system shell; the first cathode layer 2 and the second cathode layer 4 are fixedly connected to the second side inner wall 6 of the system shell, and there is a gap between the first side inner wall 5 and the second side inner wall 6 of the system shell; The upper part of the second side inner wall 6 of the system shell is provided with an inter-cooling water inlet, which is communicated with the gap between the first anode layer 1 and the first cathode layer 2; the lower part of the first side inner wall 5 of the system shell is provided with an inter-cooling water outlet, which is communicated with the gap between the second anode layer 3 and the second cathode layer 4; the first side inner wall 5 and the second side inner wall 6 are two inner walls arranged oppositely in the system shell.
[0028] The anode layer and the cathode layer arranged vertically and alternately in the system housing constitute a multi-stage electrochemical reaction unit, and the gap between adjacent electrode layers (anode layer / cathode layer) forms a water flow channel, and the stacked layout significantly improves the space utilization and makes the device structure more compact. Through the design of fixing the anode layer with the first side inner wall 5 and fixing the cathode layer with the second side inner wall 6, an S-shaped baffle type channel is naturally formed, which not only prolongs the water treatment time, but also promotes the full contact of water flow and electrode. The water flow can pass through each stage of the treatment unit in turn to realize the cascade removal of pollutants. The present application effectively removes SO4 2- and Fe 3+ in intercooling water through electrochemical effect combined with baffle type mass transfer enhancement, which not only ensures the treatment effect, but also simplifies the device structure, and effectively solves the problems of large floor area and low treatment efficiency of traditional electrochemical water treatment equipment.
[0029] For example, the anode layer of the present application is filled with coal gangue modified straw biochar material; and the cathode layer is filled with microcapsule embedded calcium alginate-distiller's grain biochar composite material. By loading coal gangue modified straw biochar as anode layer material, efficient adsorption and electrochemical conversion of SO4 2- are realized, and the material has both mineral adsorption properties of coal gangue and electrical conductivity of straw biochar; by loading microcapsule embedded calcium alginate-distiller's grain biochar as cathode layer material, selective capture and stable solidification of Fe 3+ are realized, and the composite material combines the chelating ability of calcium alginate and the porous structure characteristics of distiller's grain biochar.
[0030] The preparation method of the coal gangue modified straw biochar material is as follows: The straw is crushed to 80-100 mesh, and then pyrolyzed at 600-800 DEG C under anaerobic conditions for 2-4h to obtain straw biochar; The coal gangue is crushed and ball milled to obtain coal gangue powder; The coal gangue powder and the straw biochar are mixed in a mass ratio of 2:5, and then pyrolyzed at 600-800 DEG C under anaerobic conditions for 2-4h, and then cooled, acid washed (such as soaked in 1mol / L dilute hydrochloric acid for 24-48h), washed and dried to obtain the coal gangue modified straw biochar material.
[0031] The present application uses the synergistic pyrolysis of straw and coal gangue to make the coal gangue modified straw biochar material have both the porous properties of biochar and the mineral activity of coal gangue, which not only improves the electrical conductivity and specific surface area of the electrode, but also enhances the specific adsorption capacity of SO4 2- . The stage-by-stage anaerobic pyrolysis process ensures the stability of the carbon skeleton structure, and the subsequent acid washing process not only effectively activates the surface of the material, but also significantly improves the electrical conductivity and ion exchange capacity of the electrode.
[0032] The preparation method of the microencapsulated calcium alginate-distiller's grains biochar composite material is as follows: The distiller's grains are dried at 60-80 DEG C, crushed to 1-5 mm, and pyrolyzed at 300-600 DEG C under anaerobic conditions for 2-4 h to obtain the distiller's grains biochar; A sodium alginate solution with a mass concentration of 0.5-1.5% and the distiller's grains biochar are mixed at a mass ratio of (3-5):1 to obtain a mixed solution; the mixed solution is dropped into a calcium chloride (CaCl2) solution at a rate of 10 mL / min for solidification for 10-20 h, and after washing with desalted water, freezing and drying, the microencapsulated calcium alginate-distiller's grains biochar composite material is obtained.
[0033] The present application uses distiller's grains biochar as a core matrix, uniformly coats the core matrix with a sodium alginate solution, and crosslinks and solidifies the sodium alginate solution with calcium ions to form a stable three-dimensional network structure. The present application not only retains the high adsorption property of the distiller's grains biochar, but also enhances the selective capture capacity of the material for Fe 3+ through the ion exchange action of the calcium alginate gel layer.
[0034] The voltage range of the external power supply is 3-8 V (preferably 5-7 V), which can ensure sufficient electric field intensity to drive the directional migration of ions, and avoid energy waste and side reactions caused by excessively high voltage.
[0035] The gap width between adjacent anode layers and cathode layers is equal. The uniform gap width ensures the uniform distribution of water flow between the treatment zones, avoids the generation of local turbulent flow or dead angles, and enables all electrode surfaces to be fully utilized. In addition, the equal-interval design also makes the electric field distribution more uniform, which is conducive to the directional migration and stable removal of charged pollutants.
[0036] The second object of the present application is to provide a method for efficiently treating intercooling water by using an electrochemical method, which comprises the following steps: The intercooling water to be treated enters from the intercooling water inlet on the upper part of the second side inner wall 6 of the system shell, sequentially flows through the gap between the first anode layer 1 and the first cathode layer 2, the gap between the first cathode layer 2 and the second anode layer 3, and the gap between the second anode layer 3 and the second cathode layer 4; a voltage is applied by the external power supply, so that SO4 2- in the intercooling water migrates to the anode layer in a directional manner and is removed by adsorption, and Fe 3+ in the intercooling water migrates to the cathode layer in a directional manner and is removed by reduction; the treated intercooling water is discharged from the intercooling water outlet on the lower part of the first side inner wall 5.
[0037] The present application uses the "S" shape baffle type water flow channel formed by the vertically stacked electrode structure to make the intercooling water to be treated sequentially pass through three treatment zones, so that the pollutants are removed in stages under the action of the electric field.2- and Fe 3+ The directional migration and removal mechanism in the anode layer and the cathode layer respectively ensures the synergistic treatment effect of the two main pollutants. The method effectively removes SO4 2- and Fe 3+ through electrochemical action combined with the enhanced mass transfer of the baffle, while the integrated treatment process simplifies the operation steps, making the system run more stable and reliable. This treatment method not only improves the water purification effect, but also optimizes the energy utilization efficiency, providing an innovative solution for industrial intercooling water treatment.
[0038] Example 1 The straw was crushed to 100 mesh, pyrolyzed at 600°C under anaerobic conditions for 4 hours to obtain straw biochar. The coal gangue was crushed and ball milled for 3 hours to powder, then mixed with straw biochar at a mass ratio of 2:5, pyrolyzed at 600°C under anaerobic conditions for 4 hours. After cooling, it was soaked in 1 mol / L dilute hydrochloric acid solution for 24 hours, washed to neutral and dried to obtain coal gangue modified straw biochar material.
[0039] The distiller's grains were dried at 80°C, ground into 3mm fragments, and pyrolyzed at 600°C under anaerobic conditions for 4 hours to obtain distiller's grains biochar. A sodium alginate suspension with a mass concentration of 1.0% was mixed with distiller's grains biochar at a mass ratio of 4:1, and was dropped into a 0.1 mol / L calcium chloride solution at a rate of 10 mL / min, and solidified for 10 hours. After salt water washing, the microencapsulated calcium alginate-distiller's grains biochar composite material was obtained by freezing and drying.
[0040] The first anode layer 1 and the second anode layer 3 were both filled with coal gangue modified straw biochar material; the first cathode layer 2 and the second cathode layer 4 were both filled with microencapsulated calcium alginate-distiller's grains biochar composite material.
[0041] A direct current voltage of 3V, 4V, 5V, 6V, 7V and 8V was applied by an external power source respectively. In this process, SO4 2- in the intercooling water was mainly removed by the anode layer, and Fe 3+ was mainly removed by the cathode layer.
[0042] The treated water samples were tested for their treatment effect on SO4 2- and Fe 3+ As shown in Figure 2 , under the direct current voltages of 5V, 6V and 7V, the removal rates of SO4 2- in the intercooling water by the electrochemical integrated treatment intercooling water equipment were 84%, 94% and 97.6% respectively, and the removal rates of Fe 3+The removal rates of COD, NH4+-N and TN were 98.33%, 93.33% and 96.67%, respectively. The treatment effect of 7V on the inter-cooling water was the best under the direct current voltage.
[0043] Example 2 The straw was crushed to 80 mesh, pyrolyzed at 800°C under anaerobic conditions for 2 hours to obtain straw biochar. The coal gangue was crushed and ball milled to powder for 2 hours, then mixed with the straw biochar at a mass ratio of 2:5, pyrolyzed at 800°C under anaerobic conditions for 2 hours. After cooling, it was soaked in 1 mol / L dilute hydrochloric acid solution for 48 hours, washed to neutral and dried to obtain the coal gangue modified straw biochar material.
[0044] The distiller's grains were dried at 60°C, ground into 1 mm fragments, pyrolyzed at 300°C under anaerobic conditions for 2 hours to obtain distiller's grains biochar. A sodium alginate suspension with a mass concentration of 1.5% was mixed with the distiller's grains biochar at a mass ratio of 3:1, and was dropped into a 0.1 mol / L calcium chloride solution at a rate of 10 mL / min, and solidified for 20 hours. After salt water washing, freezing and drying, a calcium alginate-distiller's grains biochar composite material was obtained.
[0045] The first anode layer 1 and the second anode layer 3 were both filled with the coal gangue modified straw biochar material; the first cathode layer 2 and the second cathode layer 4 were both filled with the microencapsulated calcium alginate-distiller's grains biochar composite material.
[0046] Example 3 The straw was crushed to 90 mesh, pyrolyzed at 700°C under anaerobic conditions for 3 hours to obtain straw biochar. The coal gangue was crushed and ball milled to powder for 4 hours, then mixed with the straw biochar at a mass ratio of 2:5, pyrolyzed at 700°C under anaerobic conditions for 3 hours. After cooling, it was soaked in 1 mol / L dilute hydrochloric acid solution for 36 hours, washed to neutral and dried to obtain the coal gangue modified straw biochar material.
[0047] The distiller's grains were dried at 70°C, ground into 5 mm fragments, pyrolyzed at 300°C under anaerobic conditions for 2 hours to obtain distiller's grains biochar. A sodium alginate suspension with a mass concentration of 0.5% was mixed with the distiller's grains biochar at a mass ratio of 5:1, and was dropped into a 0.1 mol / L calcium chloride solution at a rate of 10 mL / min, and solidified for 20 hours. After salt water washing, freezing and drying, a calcium alginate-distiller's grains biochar composite material was obtained.
[0048] The first anode layer 1 and the second anode layer 3 were both filled with the coal gangue modified straw biochar material; the first cathode layer 2 and the second cathode layer 4 were both filled with the microencapsulated calcium alginate-distiller's grains biochar composite material.
[0049] The above merely describes the preferred embodiments of the present application, and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A system for integrated treatment of intercooled water by electrochemical method, characterized by, The system shell comprises a first anode layer (1), a first cathode layer (2), a second anode layer (3) and a second cathode layer (4) arranged in sequence from top to bottom along the vertical direction of the system shell, and a gap is arranged between adjacent anode layer and cathode layer; the anode layer is electrically connected with the positive electrode of an external power supply, and the cathode layer is electrically connected with the negative electrode of the external power supply; The first anode layer (1) and the second anode layer (3) are fixedly connected with the first side inner wall (5) of the system shell and have a gap between the second side inner wall (6) of the system shell; the first cathode layer (2) and the second cathode layer (4) are fixedly connected with the second side inner wall (6) of the system shell and have a gap between the first side inner wall (5) of the system shell; The upper part of the second side inner wall (6) of the system shell is provided with an inter-cooling water inlet, which is communicated with the gap between the first anode layer (1) and the first cathode layer (2); the lower part of the first side inner wall (5) of the system shell is provided with an inter-cooling water outlet, which is communicated with the gap between the second anode layer (3) and the second cathode layer (4); the first side inner wall (5) and the second side inner wall (6) are two inner walls oppositely arranged in the system shell.
2. The system for integrated treatment of intercooling water by electrochemical method according to claim 1, characterized in that, The anode layer is filled with coal gangue modified straw biochar material.
3. The system for efficiently treating intercooling water by electrochemical method according to claim 2, characterized in that, The preparation method of the coal gangue modified straw biochar material is: The straw is crushed and pyrolyzed under anaerobic conditions to obtain straw biochar; The coal gangue is crushed and ball milled to obtain coal gangue powder; The coal gangue powder and the straw biochar are mixed and pyrolyzed under anaerobic conditions, and then after cooling, acid washing, washing and drying, the coal gangue modified straw biochar material is obtained.
4. The system for efficiently treating intercooling water by electrochemical method according to claim 3, characterized in that, The mass ratio of the coal gangue powder and the straw biochar is 2:
5.
5. The system for integrated treatment of intercooling water by electrochemical method according to claim 1, characterized in that, The cathode layer is filled with microencapsulated calcium alginate-distiller's grain biochar composite material.
6. The system for efficiently treating intercooling water by electrochemical method according to claim 5, characterized in that, The preparation method of the microencapsulated calcium alginate-distiller's grain biochar composite material is: The distiller's grain is dried and crushed, and then pyrolyzed under anaerobic conditions to obtain distiller's grain biochar; The sodium alginate suspension and the distiller's grain biochar are mixed to obtain a mixed solution; the mixed solution is dropped into a CaCl2 solution for solidification reaction, and then after washing, freezing and drying, the microencapsulated calcium alginate-distiller's grain biochar composite material is obtained.
7. The system for efficiently treating intercooling water by electrochemical method according to claim 6, characterized in that, The mass concentration of the sodium alginate suspension is 0.5%-1.5%, and the mass ratio of the sodium alginate suspension and the distiller's grain biochar is (3-5):
1.
8. The system for efficiently treating intercooling water by electrochemical method according to claim 1, characterized in that, The voltage range of the external power supply is 3-8V.
9. The system for efficiently treating intermediate cooling water using an electrochemical method according to claim 1, characterized by, The gap width between adjacent anode layer and cathode layer is equal.
10. A method for efficiently treating inter-cooling water by electrochemical method, characterized in that, The system according to any one of claims 1-9, comprising the following steps: The intercooling water to be treated enters from the intercooling water inlet on the upper part of the inner wall (6) of the second side of the system shell, and flows through the gaps between the first anode layer (1) and the first cathode layer (2), the gaps between the first cathode layer (2) and the second anode layer (3), and the gaps between the second anode layer (3) and the second cathode layer (4) in sequence. A voltage is applied by an external power source, so that SO4 2- in the intercooling water migrates to the anode layer in a directional manner and is removed by adsorption, and Fe 3+ in the intercooling water migrates to the cathode layer in a directional manner and is removed by reduction; and the treated intercooling water is discharged from the intercooling water outlet on the lower part of the first side inner wall (5).