Converter valve external cooling water scale prevention device for directional migration

Abstract

The embodiment of the application discloses a device for preventing scale of external cooling water of a commutation valve of directional migration, which comprises a shell, a first power element and a scale prevention assembly. The shell comprises a body, a water inlet pipe and a water outlet pipe. The body has a reaction cavity. The water inlet pipe and the water outlet pipe are both communicated with the reaction cavity. The first power element is installed on the water inlet pipe. The scale prevention assembly comprises a cathode module and an anode module. Both the cathode module and the anode module are installed on the body and are used for scaling calcium and magnesium ions in the external cooling water in the reaction cavity on the cathode module. By setting the cathode module and the anode module, the calcium and magnesium ions in the external cooling water can react with electrode liquid of the cathode module and the anode module, and the calcium and magnesium ions are scaled on the cathode module, so that the carbon steel heat exchanger pipe wall is prevented from being scaled, the internal cooling water temperature is prevented from being too high, and the accidents of lockout, trip and shutdown are prevented from occurring, thereby improving the safety of production.

Description

Technical Field

[0001] This invention relates to the field of power transmission engineering technology, and in particular to a directional migration converter valve external cooling water anti-scaling device. Background Technology

[0002] The converter valve is one of the core pieces of equipment in a DC transmission project. The thyristor is the core component of the converter valve, and it generates a lot of heat during operation. To prevent damage to the converter valve components due to excessive temperature, the converter valve is usually equipped with a valve cooling system. The valve cooling system typically uses a water cooling system consisting of an external cooling system and an internal cooling system. The external cooling system of the converter station is used to cool the internal cooling system.

[0003] Converter station external cooling systems generally use an open-type circulating cooling water system. Due to contact with air, the ions in the circulating cooling water will continuously concentrate, resulting in high hardness. This leads to scaling on the carbon steel heat exchanger tube walls. Scale not only reduces heat exchange efficiency and causes excessively high internal cooling water temperature, resulting in accidents such as lockout, tripping, and shutdown, but also damages equipment and affects safe production. Summary of the Invention

[0004] Therefore, it is necessary to provide a directional migration anti-scaling device for the external cooling water of converter valves. This device aims to solve the problem that the external cooling system of converter stations generally adopts an open-loop circulating cooling water method. Due to contact with air, the ions in the circulating cooling water will continuously concentrate, resulting in high hardness. This leads to scaling on the walls of carbon steel heat exchanger tubes. Scale not only reduces heat exchange efficiency and causes excessively high internal cooling water temperature, resulting in accidents such as lockout, tripping, and shutdown, but also damages equipment and affects safe production.

[0005] This invention provides a directional migration anti-scaling device for external cooling water of a converter valve. The directional migration anti-scaling device for external cooling water of a converter valve includes a housing, a first power element, and an anti-scaling component. The housing includes a main body, an inlet pipe, and an outlet pipe. The main body has a reaction chamber. The inlet pipe and the outlet pipe are both connected to the reaction chamber. The first power element is installed on the inlet pipe and can drive external cooling water from the inlet pipe into the reaction chamber and discharge the external cooling water in the reaction chamber from the outlet pipe. The anti-scaling component includes a cathode module and an anode module. The cathode module and the anode module are both installed on the main body and are used to deposit calcium and magnesium ions in the external cooling water in the reaction chamber onto the cathode module.

[0006] In one embodiment, the cathode module includes a first mounting shell and a first semi-permeable membrane. The first semi-permeable membrane encapsulates sodium chloride within the first mounting shell. The first mounting shell has a first through hole. When the cathode module is energized, the hydroxide ions generated by the sodium chloride can flow out from the first semi-permeable membrane through the first through hole.

[0007] In one embodiment, the anode module includes a second mounting shell and a second semi-permeable membrane. The second semi-permeable membrane encapsulates sodium carbonate within the second mounting shell. The second mounting shell is provided with a second through hole. When the anode module is energized, the hydrogen ions and oxygen generated by the sodium carbonate can flow out from the second semi-permeable membrane through the second through hole.

[0008] In one embodiment, the first mounting shell is provided with a first receiving cavity and a first opening communicating with the first receiving cavity, and the first semi-permeable membrane is installed in the first receiving cavity through the first opening;

[0009] The second mounting housing has a second accommodating cavity and a second opening communicating with the second accommodating cavity, and the second semi-permeable membrane is installed in the second accommodating cavity through the second opening.

[0010] In one embodiment, the directional migration converter valve external cooling water anti-scaling device further includes a power control component electrically connected to the cathode module and the anode module.

[0011] In one embodiment, the anti-scaling component further includes a first drive module and a second drive module. The first drive module is installed in the housing and connected to the cathode module, and is used to drive the cathode module to rotate. The second drive module is installed in the housing and connected to the anode module, and is used to drive the anode module to rotate.

[0012] In one embodiment, the external cold water anti-scaling device for directional migration of the converter valve further includes a stirring assembly. The stirring assembly includes a third drive module, a rotating shaft, and multiple impellers. The third drive module is installed on the housing and connected to the rotating shaft. The multiple impellers are arranged in a ring on the rotating shaft. The third drive module drives the rotating shaft to rotate the impellers.

[0013] In one embodiment, the external cold water anti-scaling device of the directional migration converter valve further includes a first sensor and a second sensor. The first sensor is installed on the inlet pipe and is used to sense the flow rate of the inlet pipe, and the second sensor is installed on the outlet pipe and is used to sense the flow rate of the outlet pipe.

[0014] In one embodiment, the external cold water anti-scaling device of the directional migration converter valve further includes a third sensor, which is installed on the inlet pipe and used to sense the water hardness of the inlet pipe.

[0015] In one embodiment, the external cold water anti-scaling device for the directional migration converter valve further includes a cleaner and a scale collector. The cleaner is installed inside the housing, and the scale collector is installed on the cathode module. The cleaner cleans the scale on the cathode module, which falls onto the scale collector.

[0016] Implementing the embodiments of the present invention will have the following beneficial effects:

[0017] The present invention employs a directional migration anti-scaling device for external cooling water of a converter valve. The main body of this device has a reaction chamber, with both an inlet pipe and an outlet pipe connected to it. A first power element is installed on the inlet pipe, capable of driving external cooling water from the inlet pipe into the reaction chamber and discharging external cooling water from the reaction chamber through the outlet pipe. A cathode module and an anode module are both installed on the main body and are used to deposit calcium and magnesium ions from the internal and external cooling water of the reaction chamber onto the cathode module. By setting up the cathode and anode modules, the calcium and magnesium ions in the external cooling water can react with the electrode liquids of the cathode and anode modules, depositing the calcium and magnesium ions onto the cathode module. This prevents scaling on the carbon steel heat exchanger tube walls, avoiding excessively high internal cooling water temperatures that could lead to lockout, tripping, or shutdown accidents, thus improving production safety. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] in:

[0020] Figure 1 This is an isometric schematic diagram of an external cooling water anti-scaling device for directional migration of a converter valve in one embodiment.

[0021] Figure 2 for Figure 1 A schematic diagram of the scale prevention component in the external cooling water scale prevention device of the directional migration converter valve.

[0022] Figure label:

[0023] 1. Shell; 11. Body; 111. Reaction chamber; 12. Inlet pipe; 13. Outlet pipe;

[0024] 2. First power component;

[0025] 3. Anti-scaling component; 31. Cathode module; 311. First mounting shell; 312. First through hole; 313. First accommodating cavity; 314. First opening; 32. Anode module; 321. Second mounting shell; 322. Second through hole; 323. Second accommodating cavity; 324. Second opening; 33. First drive module; 34. Second drive module;

[0026] 4. Stirring assembly; 41. Third drive module; 42. Rotating shaft; 43. Impeller;

[0027] 5. First sensor; 6. Second sensor; 7. Third sensor; 8. Scale collector. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the description of this invention, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed, they are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0031] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0032] It should be noted that, where there is no conflict, the features in the embodiments of the present invention can be combined with each other.

[0033] Please combine them together Figures 1 to 2The present invention will now describe the directional migration anti-scaling device for external cooling water of a converter valve. The directional migration anti-scaling device for external cooling water of a converter valve includes a housing 1, a first power element 2, and an anti-scaling component 3. The housing 1 includes a body 11, an inlet pipe 12, and an outlet pipe 13. The body 11 has a reaction chamber 111. The inlet pipe 12 and the outlet pipe 13 are both connected to the reaction chamber 111. The first power element 2 is installed on the inlet pipe 12 and can drive external cooling water from the inlet pipe 12 into the reaction chamber 111 and discharge the external cooling water in the reaction chamber 111 from the outlet pipe 13. The anti-scaling component 3 includes a cathode module 31 and an anode module 32. Both the cathode module 31 and the anode module 32 are installed on the body 11 and are used to deposit calcium and magnesium ions from the internal and external cooling water of the reaction chamber 111 onto the cathode module 31.

[0034] It is understood that the main body 11 of the directional migration converter valve external cooling water anti-scaling device has a reaction chamber 111, and the inlet pipe 12 and outlet pipe 13 are both connected to the reaction chamber 111. The first power element 2 is installed on the inlet pipe 12. The first power element 2 can drive the external cooling water from the inlet pipe 12 into the reaction chamber 111 and discharge the external cooling water in the reaction chamber 111 from the outlet pipe 13. The cathode module 31 and the anode module 32 are both installed on the main body 11 and are used to deposit calcium and magnesium ions in the internal and external cooling water of the reaction chamber 111 onto the cathode module 31. By setting the cathode module 31 and the anode module 32, the calcium and magnesium ions in the external cooling water can react with the cathode module 31 and the anode module 32 and deposit the calcium and magnesium ions onto the cathode module 31, thereby avoiding scaling on the carbon steel heat exchanger tube wall and preventing the internal cooling water temperature from becoming too high, which could lead to blockage, tripping, and shutdown accidents, thus improving production safety.

[0035] In this embodiment, the cathode module 31 includes a first mounting shell 311 and a first semi-permeable membrane. The first semi-permeable membrane encapsulates sodium chloride within the first mounting shell 311. The first mounting shell 311 is provided with a first through hole 312. After the cathode module 31 is energized, hydroxide ions generated by sodium chloride can flow out from the first semi-permeable membrane through the first through hole 312.

[0036] The anode module 32 includes a second mounting shell 321 and a second semi-permeable membrane. The second semi-permeable membrane encapsulates sodium carbonate within the second mounting shell 321. The second mounting shell 321 is provided with a second through hole 322. After the anode module 32 is energized, hydrogen ions and oxygen generated by sodium carbonate can flow out from the second semi-permeable membrane through the second through hole 322.

[0037] Specifically, after the cathode module 31 and the anode module 32 are energized, the cathode module 31 undergoes a reduction reaction. The electrode solution of the cathode module 31 is a sodium chloride solution, which generates hydroxide ions. These ions are discharged near the cathode module 31 through the first semipermeable membrane, raising the pH value near the cathode module 31 and creating an alkaline environment for calcium and magnesium ions to form scale. At the same time, the hydroxide ions react with bicarbonate ions to form carbonate ions. The hydrogen gas generated on the cathode module 31 is discharged through the gas guide pipe, preventing the scale adsorbed on the cathode module 31 from falling off due to the generation of hydrogen gas.

[0038] The chemical reaction formula is:

[0039] 2H₂O + 2e⁻ → H₂↑ + 2OH⁻;

[0040] HCO3- + OH- → CO32- + H2O;

[0041] When voltage is applied, an oxidation reaction occurs in the anode module 32, generating hydrogen ions and oxygen. The hydrogen ions combine with carbonate ions to generate bicarbonate ions, which then pass through the second semipermeable membrane into the cathode module 31 region.

[0042] The chemical reaction formula is:

[0043] 2H₂O→4e⁻+4H⁺++O₂↑;

[0044] CO3 2- + H+ → HCO3-;

[0045] In the cathode module 31, carbonate ions combine with calcium and magnesium ions to produce scale, which is adsorbed onto the cathode module 31.

[0046] The chemical reaction formula is:

[0047] Ca²⁺ + CO₃²⁻ → CaCO₃↓;

[0048] In one embodiment, such as Figure 1 and Figure 2 As shown, the first mounting housing 311 has a first accommodating cavity 313 and a first opening 314 communicating with the first accommodating cavity 313. The first semi-permeable membrane is installed in the first accommodating cavity 313 through the first opening 314. This allows the first semi-permeable membrane to be installed inside the first accommodating cavity 313.

[0049] The second mounting housing 321 has a second accommodating cavity 323 and a second opening 324 communicating with the second accommodating cavity 323. The second semi-permeable membrane is installed in the second accommodating cavity 323 through the second opening 324. This allows the second semi-permeable membrane to be installed inside the second accommodating cavity 323.

[0050] Of course, in other embodiments, the first mounting shell 311 is provided with a first accommodating cavity 313 and a first opening 314 communicating with the first accommodating cavity 313. The first semi-permeable membrane includes a first membrane body and a second membrane body. The first membrane body is arranged around the cavity wall of the first accommodating cavity 313, and the second membrane body is disposed in the first opening 314. When the cathode module 31 is energized, the sodium chloride solution generates oxygen ions and hydrogen gas, which allows oxygen ions and hydrogen gas to flow into the reaction chamber 111 through the first membrane body and the second membrane body, thereby increasing the outflow area of ​​oxygen ions and hydrogen gas and accelerating the outflow of oxygen ions and hydrogen gas.

[0051] In another embodiment, the second mounting shell 321 is provided with a second accommodating cavity 323 and a second opening 324 communicating with the second accommodating cavity 323. The second semi-permeable membrane includes a third membrane body and a fourth membrane body. The third membrane body is arranged around the cavity wall of the second accommodating cavity 323, and the fourth membrane body is disposed in the second opening 324. When the anode module 32 is energized, the calcium carbonate solution generates hydrogen ions and oxygen, allowing hydrogen ions and oxygen to flow into the reaction chamber 111 through the third membrane body and the fourth membrane body, thereby increasing the outflow area of ​​hydrogen ions and oxygen and accelerating the outflow of hydrogen ions and oxygen.

[0052] In one embodiment, such as Figure 1 As shown, the external cooling water anti-scaling device for the directional migration converter valve also includes a power control component, which is electrically connected to the cathode module 31 and the anode module 32. The power control component includes a DC control power supply with adjustable voltage and current, and connecting lines connected to the DC control power supply. These connecting lines are also connected to the cathode module 31 and the anode module 32, thereby energizing the cathode module 31 and the anode module 32. The voltage of the DC control power supply is adjustable from 0 to 30 volts, thereby changing the voltage values ​​of the cathode module 31 and the anode module 32 to change the reaction rate of the electrode solutions in the cathode module 31 and the anode module 32.

[0053] In one embodiment, such as Figure 1 and Figure 2 As shown, the anti-scaling component 3 also includes a first drive module 33 and a second drive module 34. The first drive module 33 is installed on the housing 1, connected to the cathode module 31, and used to drive the cathode module 31 to rotate. The second drive module 34 is installed on the housing 1, connected to the anode module 32, and used to drive the anode module 32 to rotate.

[0054] Specifically, the first drive module 33 includes a first drive motor and a first drive shaft. The first drive motor is connected to the first drive shaft, and the first drive shaft is connected to the cathode module 31. The first drive motor drives the first drive shaft to rotate the cathode module 31, thereby generating centrifugal force and accelerating the outflow of ions.

[0055] The second drive module 34 includes a second drive motor and a second drive shaft. The second drive motor is connected to the second drive shaft, and the second drive shaft is connected to the anode module 32. The second drive motor drives the second drive shaft to rotate the anode module 32, which generates centrifugal force, thereby accelerating the outflow of ions.

[0056] In one embodiment, continue as follows Figure 1 and Figure 2 As shown, the external cold water anti-scaling device of the directional migration converter valve also includes a stirring assembly 4. The stirring assembly 4 includes a third drive module 41, a rotating shaft 42 and multiple impellers 43. The third drive module 41 is installed on the housing 1 and is connected to the rotating shaft 42. The multiple impellers 43 are arranged in a ring on the rotating shaft 42. The third drive module 41 drives the rotating shaft 42 to drive the impellers 43 to rotate.

[0057] Specifically, the third drive module 41 can be a third drive motor, which drives the rotating shaft 42 to rotate. The rotating shaft 42 drives the impeller 43 to rotate, so that the impeller 43 can drive the external cooling water in the reaction chamber 111 to flow, thereby increasing the reaction rate between the external cooling water and the cathode module 31 and the anode module 32, so as to increase the probability of calcium and magnesium ions combining with carbonate.

[0058] In addition, the rotational speed of the third drive motor is adjustable, thereby enabling the adjustment of the rotational speed of the impeller 43.

[0059] In one embodiment, such as Figure 1 As shown, the external cold water anti-scaling device of the directional migration converter valve also includes a first sensor 5 and a second sensor 6. The first sensor 5 is installed on the inlet pipe 12 and is used to sense the flow rate of the inlet pipe 12. The second sensor 6 is installed on the outlet pipe 13 and is used to sense the flow rate of the outlet pipe 13.

[0060] Specifically, both the first sensor 5 and the second sensor 6 are flow sensors. The first sensor 5 and the second sensor 6 are used to detect the water flow velocity in the inlet pipe 12 and the outlet pipe 13 respectively, thereby determining the flow velocity of the external cooling water in the reaction chamber 111, so as to adjust the voltage of the cathode module 31 and the anode module 32, and control the rotation speed of the stirring assembly 4.

[0061] In this embodiment, the external cold water anti-scaling device of the directional migration converter valve also includes a third sensor 7, which is installed on the inlet pipe 12 and is used to sense the water hardness of the inlet pipe 12.

[0062] Specifically, the third sensor 7 is a water hardness sensor. The water hardness sensor can sense the hardness of the external cold water at the inlet. When the hardness of the external cold water reaches the threshold, the water hardness sensor feeds back a signal to the power control component, thereby controlling the operation of the anti-scaling component 3.

[0063] In one embodiment, continue as follows Figure 1 As shown, the external cold water anti-scaling device for directional migration of the converter valve also includes a cleaner and a scale collector 8. The cleaner is installed inside the housing 1, and the scale collector 8 is installed on the cathode module 31. The cleaner cleans the scale on the cathode module 31 and the scale falls onto the scale collector 8.

[0064] Specifically, the cleaner is an ultrasonic cleaner. When the scale on the cathode module 31 reaches a certain thickness, the resistance increases and the current density decreases. At this time, the cleaner is used to clean the scale on the cathode module 31. The cleaned scale falls into the scale collector 8, which facilitates the collection and cleaning of the scale.

[0065] In one embodiment, continue as follows Figure 1 As shown, the installation position of the outlet pipe 13 is higher than that of the inlet pipe 12.

[0066] Specifically, since the anti-scaling component 3 is installed in the reaction chamber 111 of the main body 11, and the anti-scaling component 3 is a cylinder with a certain height, the installation position of the water outlet pipe 13 is higher than the installation position of the water inlet pipe 12, so that the external cold water flowing into the water inlet pipe 12 can submerge the anti-scaling component 3 in the reaction chamber 111, thereby increasing the contact area between the external cold water and the anti-scaling component.

[0067] The operation steps of this invention are as follows:

[0068] The device is placed in the external cooling water tank of the converter valve, and the external cooling water submerges the device; the first sensor 5 and the second sensor 6 are turned on; the power control component is turned on, and the cathode module 31 and the anode module 32 undergo oxidation-reduction reactions respectively, and the first drive module 33 and the second drive module 34 are turned on; the stirring component 4 is turned on to stir the water quality of the cathode module 31; the sodium chloride solution is electrolyzed to produce hydroxide ions, which combine with nearby bicarbonate and calcium and magnesium ions to form scale, which is adsorbed on the cathode module 31; the anode module 32 undergoes an oxidation reaction to generate hydrogen ions, which combine with carbonate to form bicarbonate, and the bicarbonate enters the area of ​​the cathode module 31; the gas duct discharges the hydrogen gas generated by the cathode module 31; after the scale on the cathode module 31 reaches a certain level, the ultrasonic cleaning power cleaner is turned on to collect the scale that has fallen off in the scale collector 8.

[0069] Electrodeposition technology is used to directionally migrate calcium and magnesium ions in the external cooling water to designated locations. Electrolysis of water (sodium chloride) generates hydroxide ions, creating conditions for scaling and directing the scale to the cathode module 31. This directional transfer of hydrogen generated by the cathode module 31 avoids the side effects of hydrogen. The first semi-permeable membrane only allows bicarbonate ions to pass through, preventing hydrogen ions generated on the anode from entering the cathode module 31 area and reducing the consumption of hydroxide ions by hydrogen ions.

[0070] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0071] The above description discloses only preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, equivalent variations made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. A scale prevention device for an external cooling water of a commutation valve for directional migration, characterized by, The directional migration converter valve external cooling water scale prevention device comprises a shell, a first power element and a scale prevention assembly, the shell comprises a body, a water inlet pipe and a water outlet pipe, the body has a reaction cavity, the water inlet pipe and the water outlet pipe are communicated with the reaction cavity, the first power element is installed on the water inlet pipe, the first power element can drive the external cooling water from the water inlet pipe into the reaction cavity and discharge the external cooling water in the reaction cavity from the water outlet pipe, the scale prevention assembly comprises a cathode module and an anode module, the cathode module and the anode module are installed on the body and used for scaling calcium and magnesium ions in the external cooling water in the reaction cavity on the cathode module. The cathode module comprises a first installation shell and a first semi-permeable membrane, sodium chloride is wrapped in the first installation shell, the first installation shell is provided with a first through hole, after the cathode module is powered on, hydroxyl ions generated by the sodium chloride can flow out from the first semi-permeable membrane through the first through hole, and hydrogen gas generated on the cathode module is discharged through a gas guide pipe. The anode module comprises a second installation shell and a second semi-permeable membrane, sodium carbonate is wrapped in the second installation shell, the second installation shell is provided with a second through hole, after the anode module is powered on, hydrogen ions and oxygen generated by the sodium carbonate can flow out from the second semi-permeable membrane through the second through hole.

2. The scale prevention device for the commutated valve external cooling water of the directional migration according to claim 1, characterized in that, The first installation shell is provided with a first accommodating cavity and a first opening communicated with the first accommodating cavity, and the first semi-permeable membrane is installed in the first accommodating cavity from the first opening. The second installation shell is provided with a second accommodating cavity and a second opening communicated with the second accommodating cavity, and the second semi-permeable membrane is installed in the second accommodating cavity from the second opening.

3. The scale prevention device for the commutated valve external cooling water of the directional migration according to claim 1 or 2, characterized by, The directional migration converter valve external cooling water scale prevention device further comprises a power supply control assembly electrically connected with the cathode module and the anode module.

4. The scale prevention device for the commutated valve external cooling water of the directional migration according to claim 1, characterized by, The scale prevention assembly further comprises a first driving module and a second driving module, the first driving module is installed on the shell, the first driving module is connected with the cathode module and used for driving the cathode module to rotate, the second driving module is installed on the shell, the second driving module is connected with the anode module and used for driving the anode module to rotate.

5. The scale prevention device for the commutated valve external cooling water of the directional migration according to claim 1, characterized in that, The directional migration converter valve external cooling water scale prevention device further comprises a stirring assembly, the stirring assembly comprises a third driving module, a rotating shaft and a plurality of impellers, the third driving module is installed on the shell, the third driving module is connected with the rotating shaft, a plurality of the impellers are arranged on the rotating shaft in a ring shape, and the third driving module drives the rotating shaft to drive the impellers to rotate.

6. The scale prevention device for directionally migrated converter valve external cooling water according to claim 1, characterized in that, The directional migration converter valve external cooling water scale prevention device further comprises a first sensor and a second sensor, the first sensor is installed on the water inlet pipe and used for sensing the flow of the water inlet pipe, and the second sensor is installed on the water outlet pipe and used for sensing the flow of the water outlet pipe.

7. The scale prevention device for directionally migrated converter valve external cooling water according to claim 1, characterized in that, The scale-prevention device for the directional migration of the converter valve outer cooling water further comprises a third sensor installed on the water inlet pipe and used for sensing the water hardness of the water inlet pipe.

8. The scale prevention device for directionally migrated converter valve external cooling water according to claim 1, characterized by, The scale-prevention device for the directional migration of the converter valve outer cooling water further comprises a cleaner installed in the shell and a scale collector installed on the cathode module, wherein the cleaner cleans the scale on the cathode module and the scale falls on the scale collector.

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