Electrochemical descaling device

Abstract

The utility model relates to the technical field of water treatment, in particular to an electrochemical descaling device. The electrochemical descaling device comprises a cathode, an anode and a strong acid cation exchange resin layer; the strong acid cation exchange resin layer is arranged in an operation cavity and divides the operation cavity into a cathode chamber and an anode chamber, and a cathode and an anode are respectively arranged in the cathode chamber and the anode chamber; and water flow of the circulating water system flows through the cathode chamber. And bicarbonate radicals and hydroxyl radicals in water are blocked by the negative charge layer in the double-electrode layer and cannot penetrate through the strong acid cation exchange resin layer when facing the surface of the strong acid cation exchange resin layer under the action of an electric field formed by the cathode and the anode. In this way, bicarbonate radicals and hydroxyl radicals are enriched in the cathode chamber and then react with calcium ions and magnesium ions, and the efficiency of the scaling reaction is improved. And excessive electric field energy consumption caused by useless diffusion to the cathode in the electric field is avoided. And meanwhile, idle work caused by the fact that hydrogen ions are diffused to the cathode chamber and have a neutralization reaction with hydroxyl is also avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of water treatment, in particular to an electrochemical descaling device. Background Art

[0002] The circulating water system is a water treatment system that uses a closed-loop flow method to reuse used cooling water or process water in other places after treatment to achieve the purpose of energy saving and emission reduction. This system is widely used in the field of industrial production, especially in high-energy consumption industries such as chemical, metallurgical, petrochemical and other industries, and its role is particularly significant. The composition of the circulating water system mainly includes the following parts: Inlet water treatment equipment: used to pre-treat raw water, such as filters, backwash valves, dosing devices, etc. Heat exchange equipment: used to exchange heat between high-temperature hot fluid and low-temperature cold fluid to achieve temperature reduction or increase. Cooling tower or cooling unit: used to cool the hot fluid to the required temperature. Circulating water pump: responsible for pumping edgewater to various places that need cooling. Discharge water treatment equipment: used to treat used water to ensure that it meets the emission standards. Control system: used to monitor and control the operation of the entire system to ensure that the system operates efficiently and reliably. The advantages of the circulating water system are mainly reflected in the following aspects: Saving water resources: recycling the original water and reducing the consumption of fresh water. Reduce emissions: Reduce the risk of water pollution by discharging water treatment equipment. Save energy: Recover heat energy through heat exchange equipment and reduce energy waste. Extend equipment life: Reduce equipment failure rate and extend equipment life through stable cooling conditions. Simplify facility layout: Reduce large facilities such as water cooling towers and simplify facility layout.

[0003] Hard water scaling refers to the formation of a layer of white or gray precipitate on the surface of pipes, appliances, boilers and other equipment when calcium and magnesium ions in water combine with carbonate substances to form water-insoluble solid substances during the heating process. This phenomenon usually occurs in water sources with a high mineral content or when a water source with a high hardness is used during the heating process. Hard water scaling can cause serious damage to equipment and pipes, such as affecting the normal operation of equipment, reducing thermal efficiency, increasing wear, and clogging pipes. In addition, hard water scaling can also have a negative impact on water quality, such as forming a scale layer, affecting the taste and hygiene of drinking water. To prevent hard water scaling, the following measures can be taken: Use a softener: Soften hard water to remove calcium, magnesium and other ions in it, thereby preventing scaling. Common softening methods include ion exchange, electroosmosis, steam generation, etc. Clean equipment regularly: For scale that has already occurred, it can be cleaned regularly to prevent it from continuing to accumulate. Use anti-scaling agents: Adding an appropriate amount of anti-scaling agents to water can effectively prevent hard water scaling. Choose a low-hardness water source: Whenever possible, choose a low-hardness water source as drinking water to reduce the occurrence of scaling.

[0004] In the existing circulating water system, due to the presence of calcium ions (Ca 2+ ), magnesium ion (Mg 2+ ), in long-term use, calcium ions (Ca 2+ ), magnesium ion (Mg 2+ ) will form hard water and scale inside the equipment, resulting in a shortened service life of the equipment. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides an electrochemical descaling device, which is used for filtering in a circulating water system to remove scale in water. The electrochemical descaling device includes a reaction box, a cathode, an anode, an ion exchange resin external receiving screen and a strong acid cation exchange resin layer. The interior of the reaction box constitutes an operating cavity, and a strong acid cation exchange resin layer is arranged inside the reaction box. The strong acid cation exchange resin layer divides the interior of the reaction box into a cathode chamber and an anode chamber, and the cathode and the anode are respectively installed in the cathode chamber and the anode chamber. The water flow of the circulating water system flows through the cathode chamber. The cathode and the anode form an electric field, and the direction of the electric field points from the anode chamber to the cathode chamber. The outer side of the strong acid cation exchange resin layer is provided with an external ion exchange resin holding screen. The setting of the external ion exchange resin holding screen is used to support and limit the strong acid cation exchange resin layer, avoiding deformation and damage of the strong acid cation exchange resin layer under the influence of water flow. The external ion exchange resin holding screen can be a titanium alloy mesh structure and is coated on the periphery of the strong acid cation exchange resin layer. The external ion exchange resin holding screen and the strong acid cation exchange resin layer can form a plate structure. Other specific situations are not described here. The cathode and anode can be a columnar structure or a plate structure, and can be designed according to actual use requirements. The specific situations are not described here.

[0006] When the electrochemical descaling device in this embodiment is working:

[0007] The cathode electrolysis produces a large amount of hydroxide (OH - ), the same as bicarbonate (HCO3 - ) to form carbonate (CO3 2- Calcium (Ca 2+ ), magnesium (Mg 2+ ) ions migrate toward the cathode plate under the action of the electric field and interact with the carbonate (CO3 2- ), hydroxide (OH - ) react to form calcium carbonate (CaCO3), magnesium hydroxide (Mg(OH)2) and other precipitates. These precipitates are adsorbed on the cathode plate, thereby removing calcium and magnesium ions (hardness) in the circulating water and preventing scaling of the circulating water system.

[0008] Preferably: the cathode chamber is provided with a scale removal assembly, which is used to remove scale formed in the cathode chamber, thereby avoiding scale accumulation inside the cathode chamber, protecting the cathode, reducing the cathode replacement cycle and the maintenance cost and frequency of the electrochemical descaling device.

[0009] Preferably: the descaling assembly may include a first turbine, a descaling pipe and a filter unit. One end of the descaling pipe is fixedly connected to the inside of the cathode chamber and may be at the bottom of the cathode chamber, so as to facilitate the use of gravity. The other end of the descaling pipe may be connected to another part of the cathode chamber or to a drain outlet. The specific setting needs to be made according to actual needs. A first turbine is provided at the connection between the descaling pipe and the cathode chamber. A controller is provided at the connection between the first turbine and the cathode chamber. The controller is used to control the first turbine. Under the control of the controller, the first turbine rotates to discharge the water with dirt inside the cathode chamber out of the cathode chamber and into the descaling pipe. A filter unit is installed inside the descaling pipe. The filter unit is used to filter the water entering the descaling pipe to remove dirt. The cathode may be set as a cylindrical structure at this time. The first turbine is located directly below the cathode. During the operation of the descaling assembly, the first turbine rotates directly below the cathode to form a vortex centered on the cathode. Under the action of the vortex, the bicarbonate (HCO3 - ), hydroxide (OH - ) from the cathode, while allowing the calcium ions (Ca 2+ ), magnesium ion (Mg 2+ ) revolves around the cathode and rapidly reacts with bicarbonate (HCO3 - ), hydroxide (OH - ) to react and form flocculent scale, which prevents the flake structure from adhering to the cathode surface and is difficult to clean, and is easy to filter and clean. Under the action of the first turbine, the water containing flocculent scale enters the descaling pipe for filtration, and the filtered water can re-enter the reaction box for use.

[0010] Preferably: the filter unit may include a connecting round tube and a filter layer, the connecting round tube may be threadedly connected to the descaling pipe, the filter layer is fixed inside the connecting round tube, and the filter unit may be disassembled for maintenance during assembly. Here, we mark the water flow direction inside the descaling pipe as downstream. A second turbine is installed inside the descaling pipe, the second turbine is located downstream of the filter unit, and the second turbine is connected to a controller. Under the action of the controller, the second turbine can cooperate with the first turbine to overcome the filter pressure attenuation of the filter unit.

[0011] Preferably: the descaling pipeline is connected to a descaling pipe, the descaling pipe is located upstream of the filter unit, a first control valve is provided on the descaling pipe, a second control valve is installed inside the descaling pipeline, and the second control valve is located upstream of the descaling pipe. When filtering is required, the controller controls the second control valve to open and the first control valve to close, at which time the water entering the descaling pipeline is filtered through the filter unit, when the filter cake on the filter unit forms a certain obstruction, the second control valve is closed and the first control valve is opened, at which time the second turbine rotates in the opposite direction, and the water downstream of the descaling pipeline passes through the filter unit in the opposite direction, so that the filter cake on the filter unit can be cleaned, and the water that passes through the filter unit can be discharged from the descaling pipe with dirt, so that the filter unit can be reversely cleaned, which is convenient for repeated use of the filter unit.

[0012] Preferably: a pressure sensor is installed inside the descaling pipe, the pressure sensor is located between the descaling pipe and the filter unit, and the pressure sensor is connected to the controller. The pressure sensor is used to sense the water flow pressure P upstream of the filter unit and determine whether the water flow pressure P is greater than a preset marked water pressure P 标 If yes, the controller controls the second control valve to close and the first control valve to open. At this time, the second turbine rotates in the opposite direction, and the water in the downstream of the descaling pipe passes through the filter unit in the opposite direction, so that the filter cake on the filter unit can be cleaned. The water that passes through the filter unit carries dirt and can pass through the descaling pipe and be discharged through the descaling pipe. In this way, the filter unit can be reversely cleaned, thereby realizing the intelligent cleaning of the filter unit. If no, the second control valve continues to be controlled to open, the first control valve is closed, and the second turbine rotates forward for filtering. After cleaning, the water flow pressure P' after cleaning is detected, and it is determined whether the water flow pressure P' after cleaning is less than a preset standard filtration pressure P 标 ', if yes, an alarm is issued and the filter unit is replaced, if no, no alarm is issued.

[0013] The technical effects and advantages of the utility model: calcium ions (Ca 2+ ), magnesium ion (Mg 2+ ) will pass through the strong acid cation exchange resin layer during its migration to the cathode under the action of the electric field, and will be transformed into calcium and magnesium types through the strong acid cation exchange resin layer. Calcium and magnesium ions continue to migrate from the strong acid cation exchange resin layer to the cathode under the action of the electric field, causing a double layer to form on the cathode side of the strong acid cation exchange resin layer. The outer side of the double layer is the layer of calcium and magnesium ions that migrate toward the cathode, which carries a positive charge. The inner side of the double layer is the functional group layer after the strong acid cation exchange resin layer is ionized, which carries a negative charge. The bicarbonate (HCO3 - ) and hydroxide (OH -) will be blocked by the negative charge layer in the double electric layer and cannot pass through the strong acid cation exchange resin layer under the action of the electric field. - ) and hydroxide (OH - ) is enriched in the cathode chamber and then reacts with calcium ions (Ca 2+ ), magnesium ion (Mg 2+ ) further scaling reaction occurs, which improves the efficiency of scaling reaction. The strong acid cation exchange resin layer is close to the anode side, and will be affected by calcium ions (Ca 2+ ), magnesium ion (Mg 2+ ) migrate to the cathode under the action of the electric field to generate holes. These holes attract cations in the anode chamber to fill upward. According to the characteristics of the strong acid cation exchange resin layer, it will preferentially bind calcium ions (Ca 2+ ), magnesium ion (Mg 2+ ) and other high-valent cations. Hydrogen ions (H + ), sodium ion (Na + ) will be "expelled" and remain in the anode chamber, avoiding useless diffusion to the cathode in the electric field and consuming too much electric field energy. It also avoids hydrogen ions (H + ) diffuses into the cathode chamber and reacts with hydroxide (OH - ) neutralization reaction. The strong acid cation exchange resin layer is calcium ion (Ca 2+ ), magnesium ion (Mg 2+ ) provides an ion migration path and is also equivalent to a "wire", which reduces the resistance between the cathode and anode in the electrolysis chamber and reduces the energy consumption of the electrolysis reaction. The strong acid cation exchange resin layer has better anti-pollution performance than the ion selective membrane, is easier to clean and restore after contamination, and is cheaper to replace. Therefore, the strong acid cation exchange resin layer was selected after comprehensive consideration. Calcium ion (Ca 2+ ), magnesium ion (Mg 2+ ), bicarbonate (HCO3 - ), hydroxide (OH - ) and other scaling ions are better enriched in the cathode chamber, which promotes the occurrence of scaling reactions and improves the descaling efficiency of the electrochemical descaling device. + ) and hydroxide (OH - ) and other useless negative reactions. The strong acid cation exchange resin layer also acts as a "wire", reducing the resistance of the circulating water and the energy consumption of the electrolytic reaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The utility model is a schematic structural diagram of an electrochemical descaling device.

[0015] Figure 2The present invention is a schematic diagram of the descaling principle of an electrochemical descaling device proposed by the utility model.

[0016] Figure 3 The present invention is a schematic structural diagram of a descaling component in an electrochemical descaling device proposed by the present invention.

[0017] Explanation of the reference numerals: reaction box 1; cathode 2; anode 3; ion exchange resin external receiving screen 4; strong acid cation exchange resin layer 5; descaling component 6, first turbine 7, descaling pipeline 8, first control valve 9, descaling pipe 10, second control valve 11, pressure sensor 12, filter unit 13, second turbine 14. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific purposes. Example

[0019] refer to Figure 1 In this embodiment, an electrochemical descaling device is proposed, which is used for filtering in a circulating water system to remove scale in water. The electrochemical descaling device includes a reaction box 1, a cathode 2, an anode 3, an ion exchange resin external receiving screen 4 and a strong acid cation exchange resin layer 5. The reaction box 1 constitutes an operating cavity, and a strong acid cation exchange resin layer 5 is arranged inside the reaction box 1. The strong acid cation exchange resin layer 5 divides the interior of the reaction box 1 into a cathode chamber and an anode chamber, and the cathode 2 and the anode 3 are respectively installed in the cathode chamber and the anode chamber. The water flow of the circulating water system flows through the cathode chamber. The cathode 2 and the anode 3 form an electric field, and the direction of the electric field points from the anode chamber to the cathode chamber. The outer side of the strong acid cation exchange resin layer 5 is provided with an ion exchange resin external holding screen 4. The setting of the ion exchange resin external holding screen 4 is used to support and limit the strong acid cation exchange resin layer 5, avoiding deformation and damage of the strong acid cation exchange resin layer 5 under the influence of water flow. The ion exchange resin external holding screen 4 can be a titanium alloy mesh structure and coated on the periphery of the strong acid cation exchange resin layer 5. The ion exchange resin external holding screen 4 and the strong acid cation exchange resin layer 5 can constitute a plate structure. Other specific situations are not described here. The cathode 2 and the anode 3 can be a columnar structure or a plate structure, and can be designed according to actual use requirements. The specific situations are not described here.

[0020] When the electrochemical descaling device in this embodiment is working:

[0021] The cathode 2 electrolysis produces a large amount of hydroxide (OH - ), the same as bicarbonate (HCO3 - ) to form carbonate (CO3 2- Calcium (Ca 2+ ), magnesium (Mg 2+ ) ions migrate toward the cathode plate under the action of the electric field and interact with the carbonate (CO3 2- ), hydroxide (OH - ) react to form calcium carbonate (CaCO3), magnesium hydroxide (Mg(OH)2) and other precipitates. These precipitates are adsorbed on the cathode plate, thereby removing calcium and magnesium ions (hardness) in the circulating water and preventing scaling of the circulating water system.

[0022] Calcium ions (Ca 2+ ), magnesium ion (Mg 2+ ) will pass through the strong acid cation exchange resin layer 5 during the migration process toward the cathode 2 under the action of the electric field, and will be transformed into calcium and magnesium types after passing through the strong acid cation exchange resin layer 5. Figure 2 As shown in the figure, according to the "double layer theory" proposed by Solner, calcium and magnesium ions continue to migrate from the strong acid cation exchange resin layer 5 to the cathode 2 under the action of the electric field, so that a double layer is generated on the side of the strong acid cation exchange resin layer 5 near the cathode 2. The outer side of the double layer is the layer of calcium and magnesium ions that migrate toward the cathode 2, which is positively charged. The inner side of the double layer is the functional group layer after the strong acid cation exchange resin layer 5 is ionized, which is negatively charged. The bicarbonate (HCO3 - ) and hydroxide (OH - ) will be blocked by the negative charge layer in the double electric layer and cannot pass through the strong acid cation exchange resin layer 5 under the action of the electric field. - ) and hydroxide (OH - ) is enriched in the cathode chamber and then reacts with calcium ions (Ca 2+ ), magnesium ion (Mg 2+ ) further scaling reaction occurs, which improves the efficiency of scaling reaction. According to the "hole transfer-double layer theory" proposed by Meng Hong, the strong acid cation exchange resin layer 5 is close to the anode side, and the calcium ions (Ca 2+ ), magnesium ion (Mg 2+ ) migrate to the cathode under the action of the electric field to generate holes. These holes attract cations in the anode chamber to fill upward. According to the characteristics of the strong acid cation exchange resin layer 5, it will preferentially bind calcium ions (Ca 2+ ), magnesium ion (Mg 2+ ) and other high-valent cations. Hydrogen ions (H+ ), sodium ion (Na + ) will be "expelled" and remain in the anode chamber, avoiding useless diffusion to the cathode in the electric field and consuming too much electric field energy. It also avoids hydrogen ions (H + ) diffuses into the cathode chamber and reacts with hydroxide (OH - ) neutralization reaction occurs and results in useless work. The strong acid cation exchange resin layer 5 is calcium ion (Ca 2+ ), magnesium ion (Mg 2+ ) provides a pathway for ion migration and is also equivalent to a "wire", which reduces the resistance between the anode and cathode in the electrolysis chamber and reduces the energy consumption of the electrolysis reaction.

[0023] In this embodiment, the strong acid cation exchange resin layer 5 is only calcium ion (Ca 2+ ), magnesium ion (Mg 2+ ) does not remove calcium and magnesium ions, so there is no need to regenerate the ion exchange resin.

[0024] The strong acid cation exchange resin layer 5 in the present embodiment can also be replaced with a cation selective membrane. The cation selective membrane is more excellent than the strong acid cation exchange resin layer 5 to the selective permeability of calcium and magnesium ions and to the barrier property of anions, but because the film is very thin, the electrical conductivity is worse than the strong acid cation exchange resin layer 5. Considering that the circulating water quality is poor, it is easy to cause the fouling of the cation selective membrane, and the cation selective membrane price is much higher than the strong acid cation exchange resin layer 5. The strong acid cation exchange resin layer 5 anti-pollution performance is more excellent than the ion selective membrane, and it is also easier to clean and recover after the pollution, and the replacement price is also cheaper. Therefore, the strong acid cation exchange resin layer 5 is selected after comprehensive consideration.

[0025] The electrochemical descaling device in this embodiment can achieve: calcium ions (Ca 2+ ), magnesium ion (Mg 2+ ), bicarbonate (HCO3 - ), hydroxide (OH - ) and other scaling ions are better enriched in the cathode chamber, which promotes the occurrence of scaling reactions and improves the descaling efficiency of the electrochemical descaling device. + ) and hydroxide (OH - ) and other useless negative reactions. The strong acid cation exchange resin layer 5 also acts as a "wire", reducing the resistance of the circulating water and the energy consumption of the electrolytic reaction. Example

[0026] refer to Figure 3, the cathode chamber is provided with a descaling assembly 6, which is used to remove the dirt formed in the cathode chamber, avoiding the accumulation of dirt inside the cathode chamber, protecting the cathode 2, reducing the replacement cycle of the cathode 2 and the maintenance cost and number of the electrochemical descaling device. The descaling assembly 6 may include a first turbine 7, a descaling pipe 8 and a filter unit 13. One end of the descaling pipe 8 is fixedly connected to the inside of the cathode chamber and may be at the bottom of the cathode chamber, so as to facilitate the use of gravity. The other end of the descaling pipe 8 may be connected to another part of the cathode chamber or to the drain port, and the specific needs are set according to actual needs. The first turbine 7 is provided at the place where the descaling pipe 8 is connected to the cathode chamber, and the first turbine 7 is connected to a controller, which is used to control the first turbine 7. The controller may be a three-phase KZB-K1-4000E, a three-phase KZB-K1-7500E, a three-phase KZB-K1-11000E, etc. Other situations are not described in detail here. Under the control of the controller, the first turbine 7 rotates to discharge the water with dirt inside the cathode chamber out of the cathode chamber and into the descaling pipe 8. A filter unit 13 is installed inside the descaling pipe 8. The filter unit 13 is used to filter the water entering the descaling pipe 8 to remove dirt. The filter unit 13 may include a connecting circular tube and a filter layer. The connecting circular tube may be threadedly connected to the descaling pipe 8. The filter layer is fixed inside the connecting circular tube. The filter unit 13 may be disassembled for maintenance during assembly. The cathode 2 may be set to a cylindrical structure at this time. The first turbine 7 is located directly below the cathode 2. During the operation of the descaling assembly 6, the first turbine 7 rotates directly below the cathode 2 to form a vortex centered on the cathode 2. Under the action of the vortex, the bicarbonate (HCO3 - ), hydroxide (OH - ) from cathode 2, and at the same time, calcium ions (Ca 2+ ), magnesium ion (Mg 2+ ) revolves around cathode 2 and rapidly reacts with bicarbonate (HCO3 - ), hydroxide (OH -) to react, forming flocculent scale, avoiding the flake structure attached to the surface of the cathode 2 and being difficult to clean, and facilitating filtering and cleaning. Under the action of the first turbine 7, the water containing flocculent scale enters the interior of the descaling pipe 8 for filtration, and the filtered water can re-enter the interior of the reaction box 1 for use. Here we mark the water flow direction inside the descaling pipe 8 as downstream. A second turbine 14 is installed inside the descaling pipe 8, the second turbine 14 is located downstream of the filtering unit 13, and the second turbine 14 is connected to the controller. Under the action of the controller, the second turbine 14 can cooperate with the first turbine 7 to overcome the filtration pressure attenuation of the filtering unit 13. The descaling pipe 8 is connected to a descaling pipe 10, the descaling pipe 10 is located upstream of the filtering unit 13, and a first control valve 9 is provided on the descaling pipe 10. A second control valve 11 is installed inside the descaling pipe 8, and the second control valve 11 is located upstream of the descaling pipe 10. When filtering is required, the controller controls the second control valve 11 to open and the first control valve 9 to close. At this time, the water entering the descaling pipe 8 is filtered through the filter unit 13. When the filter cake on the filter unit 13 forms a certain obstruction, the second control valve 11 is closed and the first control valve 9 is opened. At this time, the second turbine 14 rotates in the opposite direction, and the water downstream of the descaling pipe 8 passes through the filter unit 13 in the opposite direction, so that the filter cake on the filter unit 13 can be cleaned. The water passing through the filter unit 13 carries dirt and can be discharged from the descaling pipe 10, so that the filter unit 13 can be reversely cleaned, which is convenient for repeated use of the filter unit 13. A pressure sensor 12 is installed inside the descaling pipe 8. The pressure sensor 12 is located between the descaling pipe 10 and the filter unit 13, and the pressure sensor 12 is connected to the controller. The pressure sensor 12 is used to sense the water flow pressure P upstream of the filter unit 13, and to determine whether the water flow pressure P is greater than a preset marked water pressure P. 标 If yes, the controller controls the second control valve 11 to close and the first control valve 9 to open. At this time, the second turbine 14 rotates in the opposite direction, and the water downstream of the descaling pipe 8 passes through the filter unit 13 in the opposite direction, so that the filter cake on the filter unit 13 can be cleaned. The water passing through the filter unit 13 carries dirt and can pass through the descaling pipe 10 and be discharged through the descaling pipe 10. In this way, the filter unit 13 can be reversely cleaned, thereby realizing the intelligent cleaning of the filter unit 13. If no, the second control valve 11 continues to be controlled to open, the first control valve 9 is closed, and the second turbine 14 rotates forward for filtering. After cleaning, the water flow pressure P' after cleaning is detected, and it is determined whether the water flow pressure P' after cleaning is less than a preset standard filtration pressure P 标 ', if yes, an alarm is given and the filter unit 13 is replaced, if no, no alarm is given. The preset marked water pressure P 标 And standard filtration pressure P 标'It can be determined based on the filter layer performance and dirt scaling performance of the filter unit 13. For example, the pressure sensing element 12 senses the water flow pressure inside the descaling pipe 8 as 2.1Mpa. We know the preset marked water pressure P based on the filter performance and structural performance of the filter unit 13. 标 If the pressure is 2.0Mpa, we can perform reverse cleaning, the second control valve 11 is closed and the first control valve 9 is opened, the second turbine 14 rotates in the opposite direction, and the water downstream of the descaling pipeline 8 passes through the filter unit 13 in the opposite direction, so that the filter cake on the filter unit 13 can be cleaned, and the water passing through the filter unit 13 can carry dirt and pass through the descaling pipe 10 and be discharged through the descaling pipe 10. Then the water flow pressure P' after cleaning is 1Mpa, and the standard filtration pressure P we set is 标 ' is 1.5Mpa, no alarm will be issued.

[0027] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. Structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to conventional means in the field unless otherwise specified and limited.

Claims

1. An electrochemical descaling device, characterized in that: The electrochemical descaling device comprises: cathode, anode and strong acid cation exchange resin layer; A strong acid cation exchange resin layer is installed in a working cavity, and the working cavity is divided into a cathode chamber and an anode chamber, and the cathode and the anode are installed in the cathode chamber and the anode chamber respectively; The water from the circulating water system flows through the cathode chamber.

2. An electrochemical descaling device according to claim 1, characterized in that: The outer side of the strong acid cation exchange resin layer is provided with an ion exchange resin external containing screen.

3. An electrochemical descaling device according to claim 1, characterized in that: The cathode chamber is provided with a scale removal component, which is used to remove the scale formed in the cathode chamber.

4. An electrochemical descaling device according to claim 3, characterized in that: The descaling assembly includes a first turbine, a descaling pipe and a filter unit. One end of the descaling pipe is fixedly connected to the inside of the cathode chamber and is located at the bottom of the cathode chamber. A first turbine is arranged at the connection between the descaling pipe and the cathode chamber. A controller is arranged at the first turbine, and the controller is used to control the first turbine. A filter unit is installed inside the descaling pipe.

5. An electrochemical descaling device according to claim 4, characterized in that: The cathode is now configured as a cylindrical structure, and the first turbine is located directly below the cathode.

6. An electrochemical descaling device according to claim 3, characterized in that: The filter unit comprises a connecting circular tube and a filter layer. The connecting circular tube is detachably connected to the descaling pipeline, and the filter layer is fixed inside the connecting circular tube.

7. An electrochemical descaling device according to claim 4, characterized in that: A second turbine is installed inside the descaling pipeline, the second turbine is located downstream of the filtering unit, and the second turbine is connected to a controller.

8. An electrochemical descaling device according to claim 7, characterized in that: The descaling pipeline is connected to a descaling pipe, which is located upstream of the filter unit. A first control valve is provided on the descaling pipe. A second control valve is installed inside the descaling pipeline, which is located upstream of the descaling pipe.

9. An electrochemical descaling device according to claim 4, characterized in that: A pressure sensing component is installed inside the descaling pipeline, the pressure sensing component is located between the descaling pipe and the filter unit, and the pressure sensing component is connected to the controller.

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