Water-cooling furnace cover plate anti-scaling system and rare earth molten salt electrolytic bath

Abstract

The utility model discloses a water cooling furnace cover plate anti-scaling system and a rare earth molten salt electrolytic bath, and relates to the technical field of water cooling equipment, the water cooling furnace cover plate anti-scaling system comprises a water cooling furnace cover plate and a cooling water circulation unit, a cooling water channel is arranged in the water cooling furnace cover plate, and an inlet and an outlet of the cooling water channel are respectively communicated with an outlet and an inlet of the cooling water circulation unit. A first temperature sensor is arranged on an outlet pipeline of the cooling water channel, and a first water pump with an adjustable rotating speed is arranged in the cooling water circulating unit; the temperature sensor is used for detecting the outlet water temperature of the cooling water channel in the water-cooling furnace cover plate in real time, when the temperature exceeds the scaling temperature of cooling water, the rotating speed of the first water pump is increased, the flowing speed of the cooling water is increased, then the residence time of the cooling water in the water-cooling furnace cover plate is shortened, and the outlet water temperature of the cooling water channel is reduced; and the temperature is lower than the scaling temperature of cooling water, so that the anti-scaling effect of the system can be improved, and the use safety of the water-cooled furnace cover plate is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water cooling equipment, in particular to a water cooling furnace cover plate anti-scaling system and a rare earth molten salt electrolytic cell. Background Art

[0002] The rare earth molten salt electrolysis industry uses molten salt electrolytic cells to produce rare earth metals. The electrolysis temperature is relatively high, and the temperature around the slot is about 500 degrees. The slot is generally covered with a furnace cover to reduce the heat radiation of the slot. However, during natural heat exchange, the temperature of the furnace cover is about 280 degrees, which seriously affects the working environment during the furnace operation.

[0003] In order to solve the problem of high temperature of the furnace cover, the applicant has proposed a technology for lowering the temperature by water-cooling the furnace cover. Under the effect of water cooling, the temperature of the furnace cover can be reduced to 40-80 degrees. However, the water-cooled furnace cover known to the applicant is usually cooled by unsoftened tap water to save costs, but this will cause scaling of the water cooling channel in the water-cooled furnace cover during use, and when replacing the anode, a hammer will be used to manually knock on the ear part of the water-cooled furnace cover to replace the anode. The vibration caused by the knocking will cause the scaling to fall off. The detached scaling will cause the water outlet of the water-cooled furnace cover to be blocked by the scaling during long-term use, forming a closed container, which seriously affects the normal use of the water-cooled furnace cover and the refrigeration effect; in severe cases, due to the blockage, the water in the water-cooled furnace cover is continuously heated and vaporized when the electrolytic furnace continues to produce, causing the water-cooled cover to deform or even explode.

[0004] Therefore, people are in urgent need of a water-cooled furnace cover anti-scaling system with good anti-scaling effect and high safety. Summary of the invention

[0005] The purpose of the utility model is to provide a water-cooled furnace cover anti-scaling system and a rare earth molten salt electrolytic cell, which uses a temperature sensor to monitor the outlet water temperature in real time, and then adjusts the outlet water temperature by adjusting the rotation speed of a water pump, thereby ensuring that the outlet water temperature is lower than the scaling temperature, thereby improving the anti-scaling effect and the safety of use.

[0006] To achieve the above-mentioned purpose, the utility model provides the following solution: The utility model provides a water-cooled furnace cover plate anti-scaling system, including a water-cooled furnace cover plate and a cooling water circulation unit, a cooling water channel is arranged in the water-cooled furnace cover plate, the inlet and outlet of the cooling water channel are respectively connected with the outlet and inlet of the cooling water circulation unit, a first temperature sensor is arranged on the pipeline at the outlet of the cooling water channel, and a first water pump with adjustable speed is arranged in the cooling water circulation unit.

[0007] Preferably, a pH value detector is provided in the cooling water circulation unit, and a reagent feeding port for adding corrosion and scale inhibitors to the cooling water is provided in the cooling water circulation unit.

[0008] Preferably, the first temperature sensor and the first water pump are both electrically connected to a control system.

[0009] Preferably, the cooling water circulation unit includes a cooling tower, a water tank and the first water pump which are connected in sequence, the outlet of the first water pump is connected to the inlet of the cooling water channel, the inlet of the cooling tower is connected to the outlet of the cooling water channel, and the first temperature sensor is arranged on the pipeline between the inlet of the cooling tower and the cooling water channel.

[0010] Preferably, the cooling water circulation unit further includes a second water pump, and the second water pump is arranged in parallel with the first water pump.

[0011] Preferably, a first valve and a second valve are respectively disposed on both sides of the first water pump, and a third valve and a fourth valve are respectively disposed on both sides of the second water pump.

[0012] Preferably, a second temperature sensor is provided on the pipeline at the inlet of the cooling water channel, and the first temperature sensor, the second temperature sensor and the first water pump are all electrically connected to a control system.

[0013] Preferably, a first pressure sensor is provided on the pipeline at the outlet of the cooling water channel, and a second pressure sensor is provided on the pipeline at the inlet of the cooling water channel. The first pressure sensor, the second pressure sensor and the first water pump are all electrically connected to the control system.

[0014] Preferably, a fifth valve is provided on the pipeline at the outlet of the cooling water channel, and a sixth valve is provided on the pipeline at the inlet of the cooling water channel.

[0015] The utility model also provides a rare earth molten salt electrolytic cell using the water-cooled furnace cover anti-scaling system, comprising the water-cooled furnace cover anti-scaling system and an electrolytic cell body, wherein the water-cooled furnace cover is arranged at the notch of the electrolytic cell body.

[0016] Compared with the prior art, the utility model mainly achieves the following technical effects:

[0017] During the cooling process of the water-cooled furnace cover, the temperature sensor is used to detect the outlet water temperature of the cooling water channel in the water-cooled furnace cover in real time. When the temperature exceeds the scaling temperature of the cooling water, the rotation speed of the first water pump is increased to increase the flow rate of the cooling water, thereby reducing the residence time of the cooling water in the water-cooled furnace cover and reducing the outlet water temperature of the cooling water channel to be lower than the scaling temperature of the cooling water, thereby improving the anti-scaling effect of the system and improving the safety of the use of the water-cooled furnace cover.

[0018] Compared with the prior art, other solutions of the utility model have achieved the following technical effects:

[0019] Use a pH detector to detect the pH value of cooling water in real time. When the pH value is high, corrosion and scale inhibitors can be added through the reagent feeding port to help prevent scaling of the cooling water.

[0020] The first temperature sensor and the second temperature sensor can measure the temperature difference before and after the cooling water channel. The first pressure sensor and the second pressure sensor can measure the pressure difference before and after the cooling water channel. When the temperature difference and the pressure difference increase, it means that the cooling water in the cooling water channel is not flowing smoothly. At this time, the blocked cooling water channel can be handled by speeding up the cooling water flow rate or repairing it.

[0021] The first water pump and the second water pump are arranged in parallel, so that the system water pumps have one backup and one backup. When one of the water pumps has a problem, the other water pump can be used to circulate cooling water to ensure the normal operation of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] Figure 1 This is a schematic diagram of the structure of the water-cooled furnace cover anti-scaling system in the embodiment of the utility model;

[0024] Among them, 1. water-cooled furnace cover; 2. cooling water channel; 3. first temperature sensor; 4. second temperature sensor; 5. first pressure sensor; 6. second pressure sensor; 7. pH value detector; 8. reagent feeding port; 9. cooling tower; 10. water tank; 11. first water pump; 12. second water pump; 13. first valve; 14. second valve; 15. third valve; 16. fourth valve; 17. fifth valve; 18. sixth valve; 19. upper liquid level gauge; 20. lower liquid level gauge; 21. spoiler. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] The purpose of the utility model is to provide a water-cooled furnace cover anti-scaling system and a rare earth molten salt electrolytic cell to solve the problems existing in the prior art. The outlet water temperature is monitored in real time by a temperature sensor, and the outlet water temperature is adjusted by adjusting the rotation speed of a water pump to ensure that the outlet water temperature is lower than the scaling temperature, thereby improving the anti-scaling effect and the safety of use.

[0027] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0028] Please refer to Figure 1 As shown, a water-cooled furnace cover plate anti-scaling system is provided, including a water-cooled furnace cover plate 1 and a cooling water circulation unit. A cooling water channel 2 is arranged in the water-cooled furnace cover plate 1. The inlet and outlet of the cooling water channel 2 are respectively connected with the outlet and inlet of the cooling water circulation unit. The cooling water circulation unit circulates cooling water for the cooling water channel 2. A first temperature sensor 3 is arranged on the pipeline at the outlet of the cooling water channel 2 for detecting the temperature of the cooling water after heat exchange flowing out of the cooling water channel 2. A first water pump 11 with adjustable speed is arranged in the cooling water circulation unit. During the cooling process of the water-cooled furnace cover plate 1, a first water pump 11 is arranged. In the process, a temperature sensor is used to detect the outlet water temperature of the cooling water channel 2 in the water-cooled furnace cover plate 1 in real time, and the operator obtains its temperature data. When the temperature exceeds the scaling temperature of the cooling water, the rotation speed of the first water pump 11 is increased to increase the flow rate of the cooling water, thereby reducing the residence time of the cooling water in the water-cooled furnace cover plate 1 and reducing the outlet water temperature of the cooling water channel 2 to be lower than the scaling temperature of the cooling water, thereby improving the anti-scaling effect of the system and improving the safety of the use of the water-cooled furnace cover plate 1; the scaling temperature of the cooling water can be set according to actual use conditions. In this embodiment, the scaling temperature of the cooling water is 50°C.

[0029] The cooling water channel 2 is spirally arranged in the water-cooled furnace cover plate 1 , and a plurality of spoilers 21 are arranged at intervals in the cooling water channel 2 to improve the heat exchange effect and reduce the temperature of the water-cooled furnace cover plate 1 .

[0030] In order to further improve the anti-scaling effect, a pH value detector 7 is provided in the cooling water circulation unit. The probe of the pH value detector 7 is in contact with the circulating cooling water to measure the pH value of the circulating cooling water. A reagent feeding port 8 is provided in the cooling water circulation unit. The reagent feeding port 8 is used to add corrosion inhibitors and scale inhibitors to the cooling water. When the pH value detector 7 detects that the pH value of the cooling water is high, the corrosion inhibitors and scale inhibitors can be added through the reagent feeding port 8 to neutralize the Ca and Mg ions in the cooling water to help prevent scaling of the cooling water.

[0031] A sealing plug is provided at the medicine feeding port 8 to close the medicine feeding port 8 when not in use to prevent external pollutants from entering the cooling water.

[0032] A solenoid valve can be provided at the reagent feeding port 8, which is electrically connected to the control system. The reagent feeding port 8 is connected to a silo containing corrosion and scale inhibitors. By opening the solenoid valve, the corrosion and scale inhibitors in the silo automatically enter the cooling water by gravity, thereby realizing the automation of feeding.

[0033] In this embodiment, the first temperature sensor 3 and the first water pump 11 are both electrically connected to the control system. The control system is used to obtain the temperature value detected by the first temperature sensor 3 and compare it with the set scaling temperature of the cooling water. When the temperature value detected by the first temperature sensor 3 is high, the rotation speed of the first water pump 11 is controlled to be accelerated. Compared with manually observing the data of the first temperature sensor 3 and manually controlling and adjusting the rotation speed of the first water pump 11, this method not only has a high degree of automation, but also saves manpower.

[0034] The cooling water circulation unit includes a cooling tower 9, a water tank 10 and a first water pump 11 which are connected in sequence. The outlet of the first water pump 11 is connected to the inlet of the cooling water channel 2. The inlet of the cooling tower 9 is connected to the outlet of the cooling water channel 2. The first temperature sensor 3 is arranged on the pipeline between the inlet of the cooling tower 9 and the cooling water channel 2. The cooling tower 9 is used to cool the circulating water, and the water tank 10 is used to store cooling water.

[0035] The water tank 10 is provided with a lower liquid level gauge 20 and an upper liquid level gauge 19 for detecting the water level information in the water tank 10. When the water level is lower than the lower liquid level gauge 20, water needs to be replenished through the water replenishment port on the water tank 10. When the water level is higher than the upper liquid level gauge 19, the water replenishment is stopped.

[0036] On the basis of providing the water tank 10 , the pH value detector 7 and the drug feeding port 8 can both be provided on the water tank 10 .

[0037] The cooling water circulation unit also includes a second water pump 12, which is arranged in parallel with the first water pump 11. The first water pump 11 and the second water pump 12 are used as a backup. When one of the water pumps has a problem, the other water pump can be used to circulate cooling water to ensure the normal operation of the system. The second water pump 12 is electrically connected to the control system.

[0038] A first valve 13 and a second valve 14 are respectively provided on both sides of the first water pump 11, and a third valve 15 and a fourth valve 16 are respectively provided on both sides of the second water pump 12. The arrangement of the valves on both sides of the water pump allows the valves on both sides to be closed when the water pump needs maintenance, overhaul or replacement, to prevent water flow from affecting the work.

[0039] A second temperature sensor 4 is provided on the pipeline at the inlet of the cooling water channel 2. The first temperature sensor 3, the second temperature sensor 4 and the first water pump 11 are all electrically connected to the control system. The control system calculates the front and rear temperature difference of the cooling water channel 2 through the temperature data detected by the first temperature sensor 3 and the second temperature sensor 4. When the temperature difference increases, it means that the cooling water in the cooling water channel 2 is not flowing smoothly. At this time, the blocked cooling water channel 2 can be handled by speeding up the cooling water flow rate or repairing it.

[0040] A first pressure sensor 5 is provided on the pipeline at the outlet of the cooling water channel 2, and a second pressure sensor 6 is provided on the pipeline at the inlet of the cooling water channel 2. The first pressure sensor 5, the second pressure sensor 6 and the first water pump 11 are all electrically connected to the control system. The control system calculates the front and rear pressure difference of the cooling water channel 2 through the pressure data detected by the first pressure sensor 5 and the second pressure sensor 6. When the pressure difference increases, it means that the cooling water in the cooling water channel 2 is not flowing smoothly. At this time, the blocked cooling water channel 2 can be handled by speeding up the cooling water flow rate or repairing it.

[0041] In actual operation, it is preferred to try to impact the cooling water channel 2 by accelerating the cooling water flow rate. If the temperature difference and pressure difference are still high after the impact is completed, it should be repaired.

[0042] A fifth valve 17 is provided on the pipeline at the outlet of the cooling water channel 2, and a sixth valve 18 is provided on the pipeline at the inlet of the cooling water channel 2. By closing the fifth valve 17 and the sixth valve 18, it is convenient to maintain and repair the water-cooled furnace cover plate 1; on the basis of setting the first temperature sensor 3, the second temperature sensor 4, the first pressure sensor 5 and the second pressure sensor 6, any sensor can be selected to be located between the fifth valve 17 and the sixth valve 18, and the sensor between the fifth valve 17 and the sixth valve 18 can be maintained, repaired or replaced by closing the valve.

[0043] The first valve 13 , the second valve 14 , the third valve 15 , the fourth valve 16 , the fifth valve 17 and the sixth valve 18 may be manual valves or electric valves.

[0044] The utility model also provides an electrolytic cell body using the water-cooled furnace cover plate 1 anti-scaling system, wherein the water-cooled furnace cover plate 1 is arranged on the notch of the electrolytic cell body.

[0045] During actual use, the first water pump 11 is started, and the first water pump 11 draws cooling water from the water tank 10 and supplies it to the cooling water channel 2 of the water-cooled furnace cover 1. The cooling water after heat exchange from the cooling water channel 2 enters the cooling tower 9 for cooling and then enters the water tank 10 to form a circulation. During the circulation, the first temperature sensor 3, the second temperature sensor 4, the first pressure sensor 5, the second pressure sensor 6 and the pH value detector 7 detect the cooling water in real time, and transmit the detection data to the control system. The control system controls the rotation speed of the first water pump 11 and the opening and closing of the reagent feeding port 8 according to the detection data.

[0046] Adaptive changes made according to actual needs are all within the protection scope of this utility model.

[0047] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numerals in the claims should not be regarded as limiting the claims involved.

[0048] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A water-cooled furnace cover anti-scaling system, characterized in that: It includes a water-cooled furnace cover and a cooling water circulation unit. A cooling water channel is arranged in the water-cooled furnace cover. The inlet and outlet of the cooling water channel are respectively connected with the outlet and inlet of the cooling water circulation unit. A first temperature sensor is arranged on the pipeline at the outlet of the cooling water channel. A first water pump with adjustable speed is arranged in the cooling water circulation unit.

2. The water-cooled furnace cover anti-scaling system according to claim 1, characterized in that: The cooling water circulation unit is provided with a pH value detector, and the cooling water circulation unit is provided with a reagent feeding port for adding corrosion and scale inhibitors into the cooling water.

3. The water-cooled furnace cover anti-scaling system according to claim 1, characterized in that: The first temperature sensor and the first water pump are both electrically connected to a control system.

4. The water-cooled furnace cover anti-scaling system according to claim 1, characterized in that: The cooling water circulation unit includes a cooling tower, a water tank and the first water pump which are connected in sequence, the outlet of the first water pump is connected to the inlet of the cooling water channel, the inlet of the cooling tower is connected to the outlet of the cooling water channel, and the first temperature sensor is arranged on the pipeline between the inlet of the cooling tower and the cooling water channel.

5. The water-cooled furnace cover anti-scaling system according to claim 4, characterized in that: The cooling water circulation unit further includes a second water pump, which is arranged in parallel with the first water pump.

6. The water-cooled furnace cover anti-scaling system according to claim 5, characterized in that: A first valve and a second valve are respectively disposed on both sides of the first water pump, and a third valve and a fourth valve are respectively disposed on both sides of the second water pump.

7. The water-cooled furnace cover anti-scaling system according to claim 1, characterized in that: A second temperature sensor is arranged on the pipeline at the inlet of the cooling water channel, and the first temperature sensor, the second temperature sensor and the first water pump are all electrically connected to the control system.

8. The water-cooled furnace cover anti-scaling system according to claim 7, characterized in that: A first pressure sensor is arranged on the pipeline at the outlet of the cooling water channel, and a second pressure sensor is arranged on the pipeline at the inlet of the cooling water channel. The first pressure sensor, the second pressure sensor and the first water pump are all electrically connected to the control system.

9. The water-cooled furnace cover anti-scaling system according to claim 1, characterized in that: A fifth valve is arranged on the pipeline at the outlet of the cooling water channel, and a sixth valve is arranged on the pipeline at the inlet of the cooling water channel.

10. A rare earth molten salt electrolytic cell, characterized in that: It comprises the water-cooled furnace cover plate anti-scaling system and an electrolytic cell body as described in any one of claims 1 to 9, wherein the water-cooled furnace cover plate is arranged at the notch of the electrolytic cell body.

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