Active liquid lead-based metal impurity trapping device

Abstract

The invention belongs to the technical field of nuclear reactor coolant purification and metallurgy, and particularly relates to an active liquid lead-based metal impurity trapping device. The embodiment of the invention provides an active liquid lead-based metal impurity trapping device which comprises a narrow spoke type crawler belt, an impurity collecting tank, a driving motor and a driving mechanism, and the driving mechanism drives the narrow spoke type crawler belt to move, so that impurities are brought out of a free liquid level and enter the impurity collecting tank to be trapped. The trapping device is compact in structure, reliable in operation, capable of continuously working on line and particularly suitable for the field of liquid lead-based metal cooling tests, liquid metal can effectively pass through gaps by adopting a narrow spoke type crawler belt, a good collecting effect is achieved on granular, flaky and bulk impurities at a free liquid level, non-stop online continuous operation is achieved, and the working efficiency is improved. The purification efficiency is greatly improved, and long-term stable operation of a main system is guaranteed.

Description

Technical Field

[0001] This application belongs to the field of nuclear reactor coolant purification and metallurgical technology, specifically relating to an active liquid lead-based metal impurity collection device. Background Technology

[0002] When liquid lead or lead-based metals (lead-bismuth alloys, lead-lithium alloys, etc.) are used as experimental cooling media or reactor coolants, insoluble floating impurities, mainly lead oxides, iron oxides (Fe3O4), and bismuth oxides, will be generated due to oxidation and corrosion under high-temperature operating conditions. These impurities float on the surface of the main loop fluid, expansion tank, or storage tank. If they cannot be effectively removed, they may cause problems such as flow channel blockage, deterioration of heat exchange, and instrument malfunction, threatening the safe operation of the system.

[0003] Currently, common methods for collecting impurities include static fishing and passive collection. However, these methods are difficult to continuously collect and purify impurity accumulation layers with large free liquid surfaces, such as those found in storage tanks and reactors. When the liquid surface area is large and there are many impurities, the above methods are time-consuming, have poor applicability, and make it difficult to completely purify the impurities. They require shutdown operations or manual operation, resulting in problems such as low level of intelligence and low work efficiency. Summary of the Invention

[0004] The purpose of this application is to provide an active liquid lead-based metal impurity collection device to solve the problems of existing impurity collection methods mentioned in the background art.

[0005] The technical solution to achieve the purpose of this application is as follows:

[0006] This application provides an active liquid lead-based metal impurity collection device, including a narrow spoke track, an impurity collection tank, a drive motor, and a drive mechanism;

[0007] The drive mechanism includes a coupling, a transmission rod, a reversing gearbox, a bottom driven wheel, a top driven wheel, and a drive wheel;

[0008] Narrow-spoke track is obliquely fitted onto the bottom and top driven wheels;

[0009] The drive motor drives the drive wheel to rotate in the vertical plane through a coupling, transmission rod and reversing gearbox, driving the narrow strip-type collecting track to move;

[0010] The narrow-spoke track movement causes impurities to be carried out of the free liquid surface and into the impurity collection tank for capture.

[0011] Optionally, the narrow-spoke track consists of two or more parallel, spaced-apart high-temperature resistant metal spokes;

[0012] The two ends of the metal spokes pass around the bottom driven wheel and the top driven wheel through high-temperature resistant chain links or connecting shafts, forming a ring structure;

[0013] The gap between the metal spokes is 2-5mm, the width is 3-20mm, and the length is 50cm;

[0014] The tilt angle of the metal spokes is 5° to 45°, preferably 25° to 30°.

[0015] Optionally, the depth to which the narrow-spoke track is immersed in the free surface of the liquid lead-based metal is 3 to 35 cm, preferably 10 to 20 cm;

[0016] The highest point of the narrow-spoke track is higher than the impurity collection trough.

[0017] Optionally, the drive wheel is above the free liquid surface, and the part above the drive wheel is exposed to the gas space inside the collection chamber.

[0018] Optionally, the device further includes a gas-assisted mechanism, which includes a collection chamber, a gas heater, a gas cooler, an inlet pipe, and an exhaust pipe.

[0019] Inert gas is introduced into and discharged into the collection chamber through the intake and exhaust pipes;

[0020] The gas heater is connected to the inlet pipe, and the gas cooler is connected to the exhaust pipe; the gas heater heats and keeps the gas space, drive mechanism and impurity collection tank in the collection chamber warm; the gas cooler cools the discharged gas.

[0021] The device also includes auxiliary instruments, including a level gauge, a pressure sensor, and a thermocouple;

[0022] The level gauge is inserted into the collection chamber to monitor the liquid level.

[0023] A pressure sensor is connected to the outer wall of the collection chamber to monitor the pressure inside the collection chamber;

[0024] A thermocouple is inserted into the collecting chamber to measure the temperature inside the collecting chamber.

[0025] Optionally, the device may further include a top cover, an installation interface top cover, a sealing spiral wound gasket, a first graphite packing and a packing gland, a second graphite packing and a packing gland, a sealing flange, and a support structure.

[0026] The transmission rod passes through the sealing flange, top cover and collection chamber from top to bottom;

[0027] A sealing spiral wound gasket is installed between the upper and lower parts of the sealing flange;

[0028] A sealing gasket is installed between the top cover and the two left and right mounting interfaces;

[0029] A first graphite packing and a packing gland are installed between the transmission rod and the upper end face of the sealing flange;

[0030] Second graphite packing and packing glands are installed at the junctions of the air inlet pipe, exhaust pipe, level gauge, pressure sensor, and transmission rod with the collection chamber.

[0031] There is a supporting structure between the top cover and the collection chamber.

[0032] Optionally, after the impurity collection is completed, the connecting bolts between the top cover and the top covers of the left and right mounting interfaces are removed.

[0033] The impurity collection tank is disassembled by a limiting and fixing structure, the captured impurities are collected, and the impurity collection tank is replaced.

[0034] Optionally, a filter screen with a filtration accuracy of 0.5mm to 5mm is arranged at the bottom of the impurity collection tank, so that liquid lead-based metal can flow back to the free liquid surface through the filter screen at the bottom of the impurity collection tank.

[0035] Optionally, the drive motor is preferably a stepper motor or a servo motor.

[0036] The beneficial technical effects of this application are as follows: This application provides an active liquid lead-based metal impurity collection device, including a narrow-spoke track, an impurity collection tank, a drive motor, and a drive mechanism. The drive mechanism drives the narrow-spoke track to move, causing impurities to be carried out of the free liquid surface and collected in the impurity collection tank. The collection device has a compact structure, reliable operation, and can work continuously online. It is particularly suitable for the field of liquid lead-based metal cooling tests, and can continuously collect and purify impurity accumulation layers with large free liquid surfaces, such as in storage tanks and reactors. It achieves continuous online operation without stopping the machine, greatly improving purification efficiency and ensuring the long-term stable operation of the main system. The narrow-spoke track allows liquid metal to pass through gaps effectively, providing good collection of particulate, flaky, and clump-shaped impurities at the free liquid surface and reducing operating resistance. The track drive provides stable and reliable power, avoiding the risk of jamming, and the collection chamber prevents liquid splashing and oxidation of the liquid metal. Attached Figure Description

[0037] Figure 1 A schematic diagram of a dynamic liquid lead-based metal impurity collection device provided in this application embodiment;

[0038] Figure 2 A schematic diagram of a narrow-spoke track structure for an active liquid lead-based metal impurity collection device provided in this application embodiment;

[0039] In the diagram: 01 - Liquid lead-based metal; 02 - Free liquid surface;

[0040] 10-Top cover; 11-Mounting interface top cover; 12-Sealing spiral wound gasket; 13-First graphite packing and packing gland; 14-Second graphite packing and packing gland;

[0041] 20 - Narrow-spoke track; 21 - Limiting and fixing structure; 22 - Impurity collection trough;

[0042] 30-Drive motor; 31-Coupling; 32-Sealing flange; 33-Transmission rod; 34-Reversing gearbox; 35-Bottom driven wheel; 36-Top driven wheel; 37-Drive wheel; 38-Collection chamber; 39-Support structure;

[0043] 40 - Level gauge; 41 - Pressure sensor; 42 - Thermocouple;

[0044] 50 - Gas heater; 51 - Gas cooler; 52 - Inlet pipe; 53 - Exhaust pipe. Detailed Implementation

[0045] To enable those skilled in the art to better understand this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only a part of the embodiments of this application, and not all of them. Based on the embodiments described in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0046] Based on the above, in order to clearly and in detail illustrate the advantages of this application, the specific embodiments of this application will be described below in conjunction with the accompanying drawings.

[0047] See Figure 1 The figure is a schematic diagram of an active liquid lead-based metal impurity collection device provided in an embodiment of this application.

[0048] This application provides an active liquid lead-based metal impurity collection device, which includes a narrow spoke track 20, an impurity collection tank 22, a drive motor 30, and a drive mechanism.

[0049] The drive mechanism includes a coupling 31, a transmission rod 33, a reversing gearbox 34, a bottom driven wheel 35, a top driven wheel 36, and a drive wheel 37;

[0050] Narrow-spoke track 20 is obliquely fitted outside the bottom driven wheel 35 and the top driven wheel 36;

[0051] The drive motor 30 drives the drive wheel 37 to rotate in the vertical plane through the coupling 31, transmission rod 33 and reversing gear box 34, thereby driving the narrow strip collecting track 20 to move.

[0052] The movement of the narrow-spoke track 20 causes impurities to be carried out of the free liquid surface 02 and captured in the impurity collection tank 22.

[0053] It should be noted that the reversing gearbox 34 turns the horizontal rotation of the motor shaft end into a vertical plane rotation, thereby driving the narrow strip collection track 20 to move; in addition, the reversing gearbox is also a speed reduction mechanism to achieve intermittent or continuous stable low-speed movement, ensuring that the formed impurities are smoothly carried out of the liquid surface.

[0054] In some possible implementations of the embodiments of this application, the narrow-spoke track 20 is composed of two or more parallel, spaced-apart high-temperature resistant metal spokes;

[0055] The two ends of the metal spokes pass around the bottom driven wheel 35 and the top driven wheel 36 via high-temperature resistant chain links or connecting shafts to form a ring structure;

[0056] The gap between the metal spokes is 2-5mm, the width is 3-20mm, and the length is 50cm;

[0057] The tilt angle of the metal spokes is 5° to 45°, preferably 25° to 30°.

[0058] In some possible implementations of the embodiments of this application, the depth of the narrow-spoke track 20 immersed in the free liquid surface 02 of the liquid lead-based metal 01 is 3 to 35 cm, preferably 10 to 20 cm;

[0059] The highest point of the narrow-spoke track 20 is higher than the impurity collection trough 22.

[0060] It should be noted that a sheet-shaped impurity scraper is installed at the top turning part of the narrow-spoke track 20. The impurity scraper is attached to the top exit surface of the narrow-spoke track at a certain angle. When the track with impurities attached passes by, the scraper scrapes the impurities from the gaps in the narrow-spoke track and makes them fall into the impurity collection tank 22, thereby realizing the continuous collection and temporary storage of impurities. After cleaning, the track continues to move downward and is immersed in the liquid surface again to complete the collection cycle.

[0061] In some possible implementations of the embodiments of this application, the drive wheel 37 is above the free liquid surface 02, and the portion above the drive wheel 37 is exposed to the gas space in the collection chamber 38.

[0062] In some possible implementations of the embodiments of this application, the collection device further includes a gas auxiliary mechanism, which includes a collection chamber 38, a gas heater 50, a gas cooler 51, an inlet pipe 52, and an exhaust pipe 53;

[0063] Inert gas is introduced into and discharged into the collection chamber 38 through the intake pipe 52 and the exhaust pipe 53;

[0064] The gas heater 50 is connected to the inlet pipe 52, and the gas cooler 51 is connected to the exhaust pipe 53. The gas heater 50 heats and keeps the gas space, drive mechanism and impurity collection tank 22 in the collection chamber 38 warm. The gas cooler 51 cools the discharged gas.

[0065] It should be noted that the gas heater 50 heats and keeps the gas space, drive mechanism and impurity collection tank 22 in the collection chamber 38 warm to prevent the liquid lead-based metal from solidifying and sticking together.

[0066] In some possible implementations of the embodiments of this application, the collection device further includes auxiliary instruments, including a level gauge 40, a pressure sensor 41, and a thermocouple 42;

[0067] The level gauge 40 is inserted into the collection chamber 38 to monitor the liquid level; the liquid level in the collection chamber 38 is kept within a set range so that the driven wheel 35 at the bottom can be submerged in the liquid lead-based metal for 10-20 cm.

[0068] Pressure sensor 41 is connected to the outer wall of collection chamber 38 to monitor the pressure inside collection chamber 38;

[0069] Thermocouple 42 is inserted into collecting chamber 38 to measure the temperature inside collecting chamber 38.

[0070] In some possible implementations of the embodiments of this application, the collection device further includes a top cover 10, an installation interface top cover 11, a sealing spiral wound gasket 12, a first graphite packing and packing gland 13, a second graphite packing and packing gland 14, a sealing flange 32, and a support structure 39.

[0071] The transmission rod 33 passes through the sealing flange 32, the top cover 10 and the collection chamber 38 from top to bottom;

[0072] A sealing spiral wound gasket 12 is installed between the upper and lower parts of the sealing flange 32;

[0073] A sealing gasket 12 is provided between the top cover 10 and the left and right two mounting interfaces top cover 11 respectively;

[0074] A first graphite packing and a packing gland 13 are provided between the transmission rod 33 and the upper end face of the sealing flange 32;

[0075] Second graphite packing and packing gland 14 are provided at the junction of air inlet pipe 52, air outlet pipe 53, liquid level gauge 40, pressure sensor 41 and transmission rod 33 with collection chamber 38.

[0076] There is a support structure 39 between the top cover 10 and the collection chamber 38.

[0077] In some possible implementations of the embodiments of this application, after the impurity collection work is completed, the connecting bolts between the top cover 10 and the left and right mounting interface top covers 11 are removed;

[0078] The impurity collection tank 22 is disassembled by the limiting and fixing structure 21, the captured impurities are collected, and the impurity collection tank 22 is replaced.

[0079] In some possible implementations of the embodiments of this application, a filter screen with a filtration accuracy of 0.5mm to 5mm is arranged at the bottom of the impurity collection tank 22, and the liquid lead-based metal can flow back to the free liquid surface 02 through the filter screen at the bottom of the impurity collection tank 22.

[0080] In some possible implementations of the embodiments of this application, the drive motor is preferably a stepper motor or a servo motor.

[0081] This application provides an active liquid lead-based metal impurity collection device, including a narrow-spoke track 20, an impurity collection tank 22, a drive motor 30, and a drive mechanism. The drive mechanism includes a coupling 31, a transmission rod 33, a reversing gearbox 34, a bottom driven wheel 35, a top driven wheel 36, and a drive wheel 37. When the narrow-spoke track 20, which is immersed in the free liquid surface 02, passes through the liquid metal surface, its narrow spokes adhere to and collect floating impurities, causing the impurities to be carried out of the free liquid surface and into the impurity collection tank for collection. The reversing gearbox 34 is equipped with a steering reduction mechanism to achieve intermittent or continuous stable low-speed movement, ensuring that shaped impurities are smoothly carried out of the liquid surface.

[0082] The active liquid lead-based metal impurity collection device proposed in this application is compact in structure, reliable in operation, and capable of continuous online operation. It is particularly suitable for the field of liquid lead-based metal cooling tests, and can continuously collect and purify impurity accumulation layers with large free liquid surfaces in storage tanks, reactors, etc. It achieves continuous online operation without shutting down the system, greatly improving purification efficiency and ensuring the long-term stable operation of the main system. The narrow-spoke track allows liquid metal to pass through gaps effectively, providing good collection of particulate, flaky, and clump-shaped impurities at the free liquid surface and reducing operating resistance. The track drive provides stable and reliable power, avoiding the risk of jamming, and the collection chamber prevents liquid splashing and oxidation of liquid metal.

[0083] The present application has been described in detail above with reference to the accompanying drawings and embodiments. However, the present application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present application. All content not described in detail in this application can be derived from existing technology.

Claims

1. A powered liquid lead-based metal impurity collection device, characterized in that, It includes narrow-spoke track (20), impurity collection trough (22), drive motor (30) and drive mechanism; The drive mechanism includes a coupling (31), a transmission rod (33), a reversing gearbox (34), a bottom driven wheel (35), a top driven wheel (36), and a drive wheel (37); The narrow-spoke track (20) is obliquely fitted onto the bottom driven wheel (35) and the top driven wheel (36); The drive motor (30) drives the drive wheel (37) to rotate in the vertical plane through the coupling (31), transmission rod (33) and reversing gearbox (34), driving the narrow strip collecting track (20) to move; The movement of the narrow-spoke track (20) causes impurities to be carried out of the free liquid surface (02) and captured in the impurity collection tank (22).

2. The active liquid lead-based metal impurity collection device according to claim 1, characterized in that, The narrow-spoke track (20) is composed of two or more parallel, spaced-apart high-temperature resistant metal spokes; The two ends of the metal spokes pass around the bottom driven wheel (35) and the top driven wheel (36) via high-temperature resistant chain links or connecting shafts to form a ring structure; The gap between the metal spokes is 2-5mm, the width is 3-20mm, and the length is 50cm; The tilt angle of the metal spokes is 5° to 45°, preferably 25° to 30°.

3. The active liquid lead-based metal impurity collection device according to claim 1 or 2, characterized in that, The depth to which the narrow-spoke track (20) is immersed in the free liquid surface (02) of the liquid lead-based metal (01) is 3-35 cm, preferably 10-20 cm; The highest point of the narrow-spoke track (20) is higher than the impurity collection trough (22).

4. The active liquid lead-based metal impurity collection device according to claim 1, characterized in that, The drive wheel (37) is above the free liquid surface (02), and the part above the drive wheel (37) is exposed to the gas space in the collection chamber (38).

5. The active liquid lead-based metal impurity collection device according to claim 1, characterized in that, It also includes a gas-assisted mechanism, which includes a collection chamber (38), a gas heater (50), a gas cooler (51), an inlet pipe (52), and an exhaust pipe (53); Inert gas is introduced into and discharged into the collection chamber (38) through the intake pipe (52) and the exhaust pipe (53); The gas heater (50) is connected to the inlet pipe (52), and the gas cooler (51) is connected to the exhaust pipe (53). The gas heater (50) heats and keeps warm the gas space, drive mechanism and impurity collection tank (22) in the collection chamber (38). The gas cooler (51) cools the discharged gas.

6. The active liquid lead-based metal impurity collection device according to claim 1, characterized in that, It also includes auxiliary instruments, including a level gauge (40), a pressure sensor (41), and a thermocouple (42); The level gauge (40) is inserted into the collection chamber (38) to monitor the liquid level. The pressure sensor (41) is connected to the outer wall of the collection chamber (38) to monitor the pressure inside the collection chamber (38); The thermocouple (42) is inserted into the collecting chamber (38) to measure the temperature inside the collecting chamber (38).

7. The active liquid lead-based metal impurity collection device according to claim 1, characterized in that, It also includes a top cover (10), an installation interface top cover (11), a sealing spiral wound gasket (12), a first graphite packing and packing gland (13), a second graphite packing and packing gland (14), a sealing flange (32), and a support structure (39); The transmission rod (33) passes through the sealing flange (32), the top cover (10) and the collection chamber (38) from top to bottom; A sealing spiral wound gasket (12) is provided between the upper and lower parts of the sealing flange (32); Sealing gaskets (12) are respectively provided between the top cover (10) and the left and right mounting interface top covers (11); A first graphite packing and a packing gland (13) are provided between the transmission rod (33) and the upper end face of the sealing flange (32); The air inlet pipe (52), exhaust pipe (53), level gauge (40), pressure sensor (41), and transmission rod (33) are all provided with a second graphite packing and a packing cap (14) at the junction with the collection chamber (38); There is a support structure (39) between the top cover (10) and the collection chamber (38).

8. The active liquid lead-based metal impurity collection device according to claim 1, characterized in that, After the impurity collection work is completed, the connecting bolts between the top cover (10) and the left and right mounting interface top covers (11) are removed; The impurity collection tank (22) is disassembled by the limiting and fixing structure (21), the captured impurities are collected and the impurity collection tank (22) is replaced.

9. The active liquid lead-based metal impurity collection device according to claim 1, characterized in that, The bottom of the impurity collection tank (22) is equipped with a filter screen with a filtration accuracy of 0.5 mm to 5 mm, and liquid lead-based metal can flow back to the free liquid surface (02) through the filter screen at the bottom of the impurity collection tank (22).

10. The active liquid lead-based metal impurity collection device according to claim 1, characterized in that, The drive motor is preferably a stepper motor or a servo motor.

Images