Purification device and method for liquid lead-based coolant

Abstract

The invention provides purification equipment and method for a liquid lead-based coolant, and the method comprises the steps: vacuumizing a purification chamber communicated with a liquid storage part through an external vacuum pump, and enabling the liquid lead-based coolant in the liquid storage part to rise to enter an ascending channel of the purification chamber under the action of pressure difference brought by vacuumizing; if the liquid level height of the liquid lead-based coolant in the liquid storage part reaches a specified height, hydrogen-argon mixed gas is introduced into the ascending channel through an air blowing pipe, so that density and pressure reduction treatment is carried out on the liquid lead-based coolant in the ascending channel, and the liquid lead-based coolant ascends to a flow guide part of the purification chamber; the descending channel flows through the filter blocking component positioned on the flow guide part and then enters the purification chamber. According to the technical scheme, deep purification of impurities in the liquid lead-based coolant can be realized.

Description

[Technical field]

[0001] The present application relates to the technical field of impurity control and purification of liquid metal reactors, and in particular to a purification device and method for liquid lead-based coolant. [Background technology]

[0002] Liquid lead and lead-based alloys have the advantages of good thermal performance, high neutron economy, stable chemical properties and strong inherent safety as coolants. They are the main candidate working fluids for the fourth-generation fast reactor and accelerator-driven subcritical system in the world. Lead-cooled fast reactors are also internationally recognized as the fourth-generation reactor type with the greatest hope of being the first to achieve commercial application. However, during the long-term operation of liquid lead and lead-based alloys, there are problems such as continuous generation of impurities, easy accumulation, and difficulty in handling. Impurities will affect the thermal performance of the coolant, leading to deposition and scaling, deterioration of heat transfer, and even clogging of the core and heat exchanger, posing a serious safety hazard. There are many types of impurities generated by lead and lead-based alloys during routine operation. Among them, non-nuclear oxide impurities (such as Fe3O4, PbO, etc.) are mainly caused by pipe corrosion and self-oxidation of lead-based metals, which are the main interferences affecting long-term flow and heat transfer in the reactor. Therefore, the development of a safe and efficient impurity purification system is the key to ensuring the stable operation of the lead cooling circuit and reactor system.

[0003] At present, the impurity treatment of lead-based coolants mainly adopts the filtration capture method, with filters or cold traps as representative devices. The filter uses a filter screen or filter element to separate the formed solid inclusions in the liquid lead-based coolant. The cold trap adds an active cooling system on the basis of the filter, and uses the principle that the solubility of impurities decreases as the temperature decreases to further capture the impurities precipitated by cooling.

[0004] However, the filtration capture only enriches the dispersed impurities in the coolant into a single device without further deep purification of the impurities, resulting in the continuous increase of the piezoresistance of the filter and cold trap equipment during long-term operation, and both have problems such as short filter life, easy clogging and difficult replacement and repair. In addition, the capture effect of the filtration device is related to the filter element pore size parameters, and the capture effect is poor for fine impurities smaller than the filter element parameters. Therefore, the existing devices or inventions have limitations in large lead-based cooling systems and are difficult to apply for a long time.

[0005] Therefore, how to purify liquid lead-based coolant more efficiently and at a lower cost has become a technical problem that needs to be solved urgently. [Summary of the invention]

[0006] The embodiments of the present application provide a purification device and method for liquid lead-based coolant, aiming to solve the technical problems of poor purification effect and high cost of purification methods for liquid lead-based coolant in related technologies.

[0007] In a first aspect, an embodiment of the present application provides a purification device for a liquid lead-based coolant, comprising:

[0008] a liquid storage portion configured to contain a liquid lead-based coolant to be purified;

[0009] A top cover, which is arranged on the liquid storage part;

[0010] A purification chamber, comprising an air extraction port, an ascending channel, a descending channel and a guide portion, wherein the air extraction port is located on a side wall or a top of the purification chamber and is connected to an external vacuum pump, the ascending channel, the descending channel and the guide portion are connected in an n-type manner, the ascending channel and the descending channel are respectively connected to two ends of the guide portion, are inserted in the top cover and are partially located in the liquid storage portion;

[0011] an air blowing pipe, inserted in the purification chamber at a position communicating with the ascending passage, partially located in the ascending passage, and configured to introduce a hydrogen-argon mixed gas into the ascending passage;

[0012] A filter block assembly, disposed in the flow guide portion, configured to decelerate and filter the liquid lead-based coolant flowing through the flow guide portion;

[0013] The controller is connected to the external vacuum pump and the air blast pipe, and is configured to drive the external vacuum pump to evacuate the purification chamber, so that the liquid lead-based coolant inside the liquid storage part rises into the ascending channel under the pressure difference caused by the vacuum extraction. The controller is also configured to control the air blast pipe to introduce a hydrogen-argon mixed gas into the liquid lead-based coolant entering the ascending channel, so that the liquid lead-based coolant mixes with the hydrogen-argon mixed gas and then rises to the guide part, flows through the filter assembly and then enters the descending channel.

[0014] In one embodiment of the present application, optionally, the purification device further includes:

[0015] A liquid level meter, inserted in the top cover and partially located in the liquid storage part, configured to detect the height of the liquid level in the liquid storage part;

[0016] The controller is also connected to the liquid level meter, and is configured to introduce a hydrogen-argon mixed gas into the ascending channel through the gas blowing pipe when the liquid level detected by the liquid level meter reaches a specified height.

[0017] In one embodiment of the present application, optionally, the purification device further includes:

[0018] A differential pressure transmitter is connected to the purification chamber and the liquid storage part through a first pressure-introducing pipe and a second pressure-introducing pipe respectively, and is configured to detect the pressure difference between the purification chamber and the liquid storage part, wherein the first pressure-introducing pipe is closely inserted in the top of the purification chamber, and is partially located inside the purification chamber, and the second pressure-introducing pipe is inserted in the top cover, and is partially located inside the liquid storage part;

[0019] The controller is also connected to the differential pressure transmitter, and is configured to adjust the vacuuming intensity of the external vacuum pump and the blowing flow rate of the blowing pipe based on the differential pressure detected by the differential pressure transmitter.

[0020] In one embodiment of the present application, optionally, the liquid storage portion includes a liquid inlet, a liquid drain and a support base, the liquid inlet is configured to allow liquid lead-based coolant to flow into the liquid storage portion; the liquid drain is configured to allow liquid lead-based coolant to flow out of the liquid storage portion; and the support base is configured to support the liquid storage portion.

[0021] In one embodiment of the present application, optionally, the purification device further includes:

[0022] The oxygen sensor is inserted on the top cover and partially located inside the liquid storage part, and is configured to detect the dissolved oxygen concentration of the liquid lead-based coolant.

[0023] In one embodiment of the present application, optionally, the clean room further comprises:

[0024] The reinforcing rib protrudes from the outer wall of the clean room and contacts the surface of the top cover. The reinforcing rib has a plurality of fixing holes, and the fixing holes are equipped with flanges and lens pads so that the clean room is fixed to the top cover.

[0025] In one embodiment of the present application, optionally, the ascending channel is a circular tube, a vertical square groove, a trapezoidal groove, an inverted trapezoidal groove or a trumpet-shaped groove whose middle cross-sectional width is narrower than the cross-sectional width at both ends. When the ascending channel is the trumpet-shaped groove, the bottom of the air blower is located at the narrow cross-sectional width of the trumpet-shaped groove; the descending channel is a circular tube, a vertical square groove or a trapezoidal groove; the guide portion includes a guide plate, and the liquid lead-based coolant flows through the guide plate when entering the descending channel from the ascending channel, wherein the guide plate is a plane; or the guide plate is an inclined surface, the first end of the inclined surface is adjacent to the ascending channel, the second end of the inclined surface is adjacent to the descending channel, and the first end is higher than the second end.

[0026] In one embodiment of the present application, optionally, the air blow pipe is inserted at the top of the purification chamber, and the hydrogen content of the hydrogen-argon mixture is 5 vol.%; or the air blow pipe is inserted at the side wall of the purification chamber, and the hydrogen content of the hydrogen-argon mixture is greater than or equal to 0.5 vol.% and less than or equal to 20 vol.%.

[0027] In one embodiment of the present application, optionally, the filter blocking component includes:

[0028] A connecting plate, wherein a fixing groove is provided on the top of the clean room, and the connecting plate is movably embedded in the top of the clean room through the fixing groove;

[0029] The filter element is connected to the connecting plate, and a width-adjustable gap is provided between the guide plate and the filter element. The width-adjustable gap is a non-blocking filter channel for the liquid lead-based coolant and is configured to adjust the width by pulling the connecting plate in the fixing groove.

[0030] In a second aspect, an embodiment of the present application provides a method for purifying a liquid lead-based coolant, which is used in the purification device for a liquid lead-based coolant described in any one of the first aspects above, comprising:

[0031] The purification chamber connected to the liquid storage part is evacuated by an external vacuum pump, so that the liquid lead-based coolant inside the liquid storage part rises into the ascending channel of the purification chamber under the pressure difference caused by the vacuuming;

[0032] If the liquid level of the liquid lead-based coolant in the liquid storage section reaches a specified height, a hydrogen-argon mixed gas is introduced into the ascending channel through an air blowing pipe to reduce the density and pressure of the liquid lead-based coolant in the ascending channel, so that the liquid lead-based coolant rises to the guide section of the purification chamber, flows through the filter assembly located in the guide section, and then enters the descending channel of the purification chamber.

[0033] In one embodiment of the present application, optionally, before the hydrogen-argon mixed gas is introduced into the ascending channel, the method further comprises:

[0034] detecting a pressure difference between the purification chamber and the liquid storage portion;

[0035] Based on the pressure difference, the vacuuming intensity of the external vacuum pump and the blowing flow rate of the blowing pipe for introducing the hydrogen-argon mixed gas are set.

[0036] In one embodiment of the present application, optionally, it further includes:

[0037] Based on a preset purification requirement level, the width of the gap between the guide plate of the guide portion and the filter element of the filter blocking assembly is set.

[0038] In a third aspect, an embodiment of the present application provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are used to execute the method described in the first aspect above.

[0039] The above technical solution aims at the technical problems of poor purification effect and high cost of purification methods for liquid lead-based coolants in related technologies. The purification equipment for liquid lead-based coolants combines hydrogen bubbling, vacuum degassing and capture functions, which can effectively filter out fine molded impurities, gas impurities and impurities that may be generated in the purification process in the cooling system of the liquid lead-based coolant. Furthermore, the bubbling and mixing process is conducive to the aggregation and growth of fine inclusions, forming larger particle size molded impurities, which is convenient for deep capture. At the same time, the capture and hydrogen bubbling can be used to concentrate the reduction of oxide impurities in liquid lead and lead-based alloys, which can achieve deep purification of lead-based coolant impurities.

Brief Description of the Drawings

[0040] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0041] Figure 1 A cross-sectional view of a purification device for liquid lead-based coolant according to one embodiment of the present application is shown;

[0042] Figure 2 A left side view of a purification device for liquid lead-based coolant according to one embodiment of the present application is shown;

[0043] Figure 3 A cross-sectional view of a clean room according to an embodiment of the present application is shown;

[0044] Figure 4 A top view of a clean room according to one embodiment of the present application is shown;

[0045] Figure 5 A cross-sectional view of a filter block according to an embodiment of the present application is shown;

[0046] Figure 6 A cross-sectional view of a filter block according to another embodiment of the present application is shown;

[0047] Figure 7 A flow chart of a method for purifying liquid lead-based coolant according to an embodiment of the present application is shown. [Specific implementation method]

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] Figure 1 and Figure 2 A cross-sectional view and a left side view of a purification device for liquid lead-based coolant according to an embodiment of the present application are shown.

[0050] Combination Figure 1 and Figure 2 As shown, a purification device for liquid lead-based coolant according to an embodiment of the present application includes: a liquid storage portion 10, a top cover 20, a purification chamber 30, an air blow pipe 40, a filter assembly 50 and a controller, which is not shown in the figure.

[0051] The liquid storage part 10 is configured to contain liquid lead-based coolant to be purified, and the top cover 20 is disposed on the liquid storage part 10 .

[0052] In one possible design, the liquid storage portion 10 includes a liquid inlet 11, a liquid outlet 12 and a support base 13, wherein the liquid inlet 11 is configured to allow liquid lead-based coolant to flow into the liquid storage portion 10; the liquid outlet 12 is configured to allow liquid lead-based coolant to flow out of the liquid storage portion 10; and the support base 13 is configured to support the liquid storage portion 10.

[0053] like Figure 3 As shown, the purification chamber 30 includes an exhaust port 31, an ascending channel 32, a descending channel 33 and a guide portion. The exhaust port 31 is located on the side wall of the purification chamber 30 and is connected to an external vacuum pump. The ascending channel 32, the descending channel 33 and the guide portion are connected in an n-type manner. The ascending channel 32 and the descending channel 33 are respectively connected to the two ends of the guide portion, are inserted in the top cover 20 and are partially located in the liquid storage portion 10.

[0054] In another possible design, the air suction port 31 is located at the top of the purification chamber 30 .

[0055] In a possible design, the rising channel 32 is a circular tube, a vertical square groove, a trapezoidal groove, an inverted trapezoidal groove, or a trumpet-shaped groove whose middle cross-sectional width is narrower than the cross-sectional width at both ends. When the rising channel is the trumpet-shaped groove, the bottom of the air blower is located at the narrow cross-sectional width of the trumpet-shaped groove.

[0056] In a possible design, the descending channel 33 is a circular tube, a vertical square groove or a trapezoidal groove.

[0057] In a possible design, the guide portion includes a guide plate 35 , and the liquid lead-based coolant flows through the guide plate 35 when entering the descending channel 33 from the ascending channel 32 .

[0058] Optionally, the guide plate 35 is a plane.

[0059] Optionally, the guide plate 35 is an inclined surface, a first end of the inclined surface is adjacent to the ascending channel 32 , a second end of the inclined surface is adjacent to the descending channel 33 , and the first end is higher than the second end.

[0060] In one possible design, Figure 4 As shown, the clean room 30 further includes reinforcing ribs 34 , which protrude from the outer wall of the clean room 30 and contact the surface of the top cover 20 . The reinforcing ribs 34 have a plurality of fixing holes, which are equipped with flanges and lens pads to fix the clean room 30 to the top cover 20 .

[0061] The air blowing pipe 40 is inserted in a position of the purification chamber 30 communicating with the ascending passage 32 , is partially located in the ascending passage 32 , and is configured to introduce a hydrogen-argon mixed gas into the ascending passage 32 .

[0062] In a possible design, the gas blowing pipe 40 is inserted at the top of the purification chamber 30, and the hydrogen content of the hydrogen-argon mixed gas is 5 vol.%.

[0063] In another possible design, the air blowing pipe 40 is inserted into the side wall of the purification chamber 30, and the proportion of hydrogen in the hydrogen-argon mixed gas is greater than or equal to 0.5 vol.% and less than or equal to 20 vol.%.

[0064] The filter resistance assembly 50 is disposed in the guide portion, and is configured to decelerate and filter the liquid lead-based coolant flowing through the guide portion.

[0065] In one possible design, Figure 5 As shown, the filter blocking assembly 50 includes a connecting plate 51 and a filter element 52. A fixed groove is provided at the top of the purification chamber 30, and the connecting plate 51 is movably embedded in the top of the purification chamber 30 through the fixed groove; the filter element 52 is connected to the connecting plate 51, and there is an adjustable width gap between the guide plate 35 and the filter element 52. The adjustable width gap is a non-filter blocking channel for liquid lead-based coolant, and is configured to adjust the width by pulling the connecting plate 51 in the fixed groove.

[0066] Of course, the connecting plate 51 and the filter element 52 are not limited to Figure 5 The form shown can also be Figure 6 Any shape and structure as shown can meet the actual filtering requirements.

[0067] The controller is connected to the external vacuum pump and the air blast pipe 40, and is configured to drive the external vacuum pump to evacuate the purification chamber 30, so that the liquid lead-based coolant inside the liquid storage part 10 rises into the ascending channel 32 under the pressure difference caused by the vacuum. The controller is also configured to control the air blast pipe 40 to introduce a hydrogen-argon mixture into the liquid lead-based coolant entering the ascending channel 32, so that the liquid lead-based coolant mixes with the hydrogen-argon mixture and then rises to the guide part, flows through the filter assembly 50 and then enters the descending channel 33.

[0068] The purification device further includes a liquid level meter 80, which is inserted into the top cover 20 and partially located in the liquid storage part 10, and is configured to detect the liquid level in the liquid storage part 10. Accordingly, the controller is also connected to the liquid level meter 80, and is configured to introduce the hydrogen-argon mixed gas into the ascending channel 32 through the air blowing pipe 40 when the liquid level detected by the liquid level meter 80 reaches a specified height.

[0069] The purification device further includes a differential pressure transmitter 60, which is connected to the purification chamber 30 and the liquid storage part 10 through two pressure-inducing pipes 61, respectively, wherein the two pressure-inducing pipes 61 are respectively a first pressure-inducing pipe and a second pressure-inducing pipe, and the first pressure-inducing pipe and the second pressure-inducing pipe are configured to detect the pressure difference between the purification chamber 30 and the liquid storage part 10, wherein the first pressure-inducing pipe is closely inserted at the top of the purification chamber 30, and part of it is located inside the purification chamber 30, and the second pressure-inducing pipe is inserted on the top cover 20, and part of it is located inside the liquid storage part 10. Accordingly, the controller is also connected to the differential pressure transmitter 60, and is configured to adjust the vacuum strength of the external vacuum pump and the blowing flow rate of the blowing pipe 40 based on the pressure difference detected by the differential pressure transmitter 60.

[0070] The purification device further includes an oxygen sensor 70, which is inserted on the top cover 20, partially located inside the liquid storage part 10, and is configured to detect the dissolved oxygen concentration of the liquid lead-based coolant. Accordingly, the controller is also connected to the oxygen sensor 70, and is configured to guide the liquid lead-based coolant out of the liquid storage part 10 through the drain port 12 when the dissolved oxygen concentration detected by the oxygen sensor 70 reaches the standard.

[0071] In addition, in a possible design, the liquid storage part 10 is provided with a liquid inlet 11, a liquid outlet 12 and a support base 13, and the outer wall surface of the liquid storage part 10 is covered by electric heating wires, heating belts and thermal insulation cotton to achieve the function of thermal insulation and heating. The liquid storage part 10 is connected to the top cover 20 by a flange and sealed by a lens gasket. The top cover 20 is provided with a through hole or a boss for installing the purification chamber 30, the oxygen sensor 70 and other devices and instrument accessories.

[0072] Among them, the installation and sealing methods can be selected from flange (with gasket), thread (with gasket) or welding.

[0073] In a possible design, two pressure-inducing pipes 61 are connected and sealed with the purification chamber 30 and the top cover 20 by welding; the oxygen sensor 70 and the liquid level meter 80 are sealed by threads (with gaskets); the purification chamber 30 is connected and sealed by flanges and lens gaskets. Except for the position where the instrument is installed, the outer surface of the top cover 20 is covered with heating belts and thermal insulation cotton to achieve heat preservation and reduce heat dissipation.

[0074] In a possible design, a circle of holes is formed on the reinforcing rib 34, which is connected to the top cover 20 through a flange and a lens pad, and the lower part of the purification chamber 30 is located below the top cover 20. The bottom of the purification chamber 30 is composed of an ascending channel 32, a descending channel 33 and a guide plate 35. Optionally, the ascending channel 32 and the descending channel 33 can be in the form of a circular tube, a vertical square groove, a trapezoidal groove or a special-shaped groove, and the guide plate 35 can be an inclined surface or a plane.

[0075] In a possible design, both the ascending channel 32 and the descending channel 33 are vertical square grooves, and the inclination of the guide plate 35 is 5°, which is convenient for draining the liquid lead-based coolant. Of course, the inclination of the guide plate 35 can also be any other degree that meets the actual drainage requirements.

[0076] In one possible design, the rising channel 32 can be a trumpet-shaped groove or an inverted trapezoidal groove with a narrow cross-sectional area in the middle and wide cross-sectional areas at both ends. At the same time, the bottom end of the air blower 40 is located at a position with a narrower cross-sectional area in the rising channel 32, which is conducive to the expansion and crushing of bubbles during the rising process.

[0077] In one possible design, the purification chamber 30 is provided with an air extraction port 31 at the side wall near the rising channel 32, and the air extraction port 31 is connected to an external vacuum pump. The pressure difference between the liquid storage part 10 and the purification chamber 30 determines the rising liquid level of the liquid lead-based coolant, and the air extraction port 31 is higher than the highest liquid level to which the liquid lead-based coolant may rise. In another possible design, the air extraction port 31 is arranged at the top of the purification chamber 30.

[0078] In a possible design, a hole is opened above the ascending channel 32 corresponding to the top of the purification chamber 30, and an air blast pipe 40 is inserted below the liquid surface in the ascending channel 32. A hydrogen-argon mixed gas is injected through the air blast pipe 40, and the ratio of hydrogen in the mixed gas is 5 vol.%. The bubbles rise and expand, so that the density and pressure of the fluid in the ascending channel 32 are lower than those in the descending channel 33. The vacuum pressure difference is used to lift the liquid lead-based coolant in the ascending channel 32 to continue to rise, and then flows into the descending channel 33 through the guide plate 35.

[0079] In another possible design, the blowpipe 40 may be inserted into the side wall opening of the purification chamber 30, and the hydrogen content of the injected hydrogen-argon mixed gas is greater than or equal to 0.5 vol.% and less than or equal to 20 vol.%. Optionally, the hydrogen content is 10 vol.%.

[0080] In a possible design, a groove is opened in the middle of the upper surface of the purification chamber 30, and the filter assembly 50 is inserted inwardly. The top of the filter assembly 50 is connected to the purification chamber 30 through a flange, and the filter assembly 50 can be removed, lifted out and replaced.

[0081] Optionally, a groove is formed on the connecting plate 51 of the filter assembly 50 and a filter element 52 is placed thereon to intercept and capture large-sized impurity particles, and the reduction time of the liquid lead-based coolant and hydrogen is prolonged by blocking the filter element 52 .

[0082] Optionally, there is a narrow gap between the lower end of the connecting plate 51 of the filter assembly 50 and the surface of the guide plate 35 , and the distance between the two is adjusted by the thickness of the gasket between the filter assembly 50 and the purification chamber 30 .

[0083] In a possible design, the filter element 52 is made of a multi-layer metal wire mesh, and the filter pore size of the filter element is 500 μm.

[0084] In a possible design, the filter element 52 may be made of a metal wire mesh, a sintered metal mesh, a metal-filled mesh or a perforated plate, and may have a single-layer or multi-layer structure. The minimum filtration aperture of the filter element is 20 μm and the maximum is 5 mm.

[0085] In a possible design, the middle portion of the upper surface of the purification chamber 30 is not grooved, and the filter assembly 50 is connected to the purification chamber 30 by welding.

[0086] In a possible design, in order to ensure the purification speed, the filter assembly 50 may not be installed.

[0087] In addition, the liquid level sensor 80 may be provided with a thermocouple to monitor the temperature in the liquid storage section while monitoring the liquid level in the liquid storage section.

[0088] In a possible design, a liquid level sensor and a thermocouple may also be disposed on the top of the purification chamber 30 .

[0089] In the technical solution of the present application, the controller controls the external vacuum pump to evacuate the purification chamber 30 through the suction port 31, and the liquid lead-based coolant enters the liquid storage tank 10 of the purification device through the liquid inlet 11, and enters the purification chamber 30 through the ascending channel 32 and the descending channel 33 under the pressure difference caused by the vacuum. At this time, the hydrogen-argon mixed gas is injected into the ascending channel 32 through the air blast pipe 40, resulting in a decrease in the density and pressure of the liquid lead-based coolant in the ascending channel 32, causing the liquid level in the ascending channel 32 to be higher than the liquid level in the descending channel 33. At this point, the liquid lead-based coolant is lifted upward from the ascending channel 32, flows through the guide plate 35, and then flows back to the liquid storage part 10 from the descending channel 33 under the action of gravity.

[0090] In this process, the liquid lead-based coolant can precipitate gas impurities such as oxygen, hydrogen and radioactive inert gas in the vacuum section of the purification chamber 30 itself.

[0091] During the blowing process of the air blowing pipe 40, the impurity particles in the liquid lead-based coolant are agitated and floated by the bubbles and then intercepted and captured by the filter element 52 at the bottom of the filter assembly 50, thereby extending the time of reduction and purification. At the same time, the hydrogen-argon mixed gas blown into the air blowing pipe will also precipitate in the vacuum section of the purification chamber 30, thereby preventing new impurity gases from being introduced during the purification process.

[0092] In addition, the operating conditions of the purification equipment can be controlled by the feedback signal of the differential pressure transmitter 60. The height of the liquid level in the purification chamber 30 and the purification efficiency can be adjusted by increasing the internal and external pressure difference and the aeration flow rate.

[0093] The above technical solution combines hydrogen bubbling, vacuum degassing and capture functions in the purification equipment for liquid lead-based coolant, which can effectively filter out fine molded impurities, gas impurities and impurities that may be generated in the purification process in the cooling system of the liquid lead-based coolant. Furthermore, the bubbling and mixing process is conducive to the aggregation and growth of fine inclusions, forming larger particle size molded impurities, which is convenient for deep capture. At the same time, the use of capture and hydrogen bubbling can concentrate on reducing oxide impurities in liquid lead and lead-based alloys, which can achieve deep purification of impurities in liquid lead-based coolant and improve the purification effect.

[0094] Figure 7 A flow chart of a method for purifying liquid lead-based coolant according to an embodiment of the present application is shown.

[0095] like Figure 7 As shown, the method includes:

[0096] Step 702, evacuate the purification chamber connected to the liquid storage part by an external vacuum pump, so that the liquid lead-based coolant inside the liquid storage part rises into the rising channel of the purification chamber under the pressure difference caused by the vacuum.

[0097] Step 704, if the liquid level of the liquid lead-based coolant in the liquid storage part reaches a specified height, a hydrogen-argon mixed gas is introduced into the ascending channel through an air blast pipe to reduce the density and pressure of the liquid lead-based coolant in the ascending channel, so that the liquid lead-based coolant rises to the guide part of the purification chamber, flows through the filter assembly located in the guide part, and then enters the descending channel of the purification chamber.

[0098] Optionally, before the hydrogen-argon mixed gas is introduced into the ascending channel, the process further includes: detecting the pressure difference between the purification chamber and the liquid storage part; and setting the vacuuming strength of the external vacuum pump and the blowing flow rate of the blowing pipe for introducing the hydrogen-argon mixed gas based on the pressure difference. The smaller the pressure difference, the higher the required vacuuming strength, so that the liquid lead-based coolant in the liquid storage part can have enough force to resist gravity and rise into the purification chamber. At the same time, when the pressure difference is large enough, it means that the height of the liquid lead-based coolant in the purification chamber is high enough to reach the bottom of the blowing pipe, and the conditions for being blown are met.

[0099] Optionally, the width of the gap between the guide plate of the guide part and the filter element of the filter blocking assembly can be set based on a preset purification requirement level, wherein different purification requirement levels correspond to different width values, and the higher the purification requirement level, the smaller the corresponding width value.

[0100] The above technical solutions are used for Figures 1 to 6 The purification equipment for liquid lead-based coolant shown has all the technical effects described above and will not be repeated here.

[0101] In addition, an embodiment of the present application provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are used to perform the following steps:

[0102] The purification chamber connected to the liquid storage part is evacuated by an external vacuum pump, so that the liquid lead-based coolant inside the liquid storage part rises into the ascending channel of the purification chamber under the pressure difference caused by the vacuuming;

[0103] If the liquid level of the liquid lead-based coolant in the liquid storage section reaches a specified height, a hydrogen-argon mixed gas is introduced into the ascending channel through an air blowing pipe to reduce the density and pressure of the liquid lead-based coolant in the ascending channel, so that the liquid lead-based coolant rises to the guide section of the purification chamber, flows through the filter assembly located in the guide section, and then enters the descending channel of the purification chamber.

[0104] It should be noted that the above functions or steps that can be implemented by the computer-readable storage medium or computer device can refer to the relevant description in the aforementioned method embodiment. In order to avoid repetition, they will not be described one by one here.

[0105] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0106] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0107] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A purification device for liquid lead-based coolant, characterized in that: include: a liquid storage portion configured to contain a liquid lead-based coolant to be purified; A top cover, which is arranged on the liquid storage part; A purification chamber, comprising an air extraction port, an ascending channel, a descending channel and a guide portion, wherein the air extraction port is located on a side wall or a top of the purification chamber and is connected to an external vacuum pump, the ascending channel, the descending channel and the guide portion are connected in an n-type manner, the ascending channel and the descending channel are respectively connected to two ends of the guide portion, are inserted in the top cover and are partially located in the liquid storage portion; an air blowing pipe, inserted in the purification chamber at a position communicating with the ascending passage, partially located in the ascending passage, and configured to introduce a hydrogen-argon mixed gas into the ascending passage; A filter block assembly, disposed in the flow guide portion, configured to decelerate and filter the liquid lead-based coolant flowing through the flow guide portion; The controller is connected to the external vacuum pump and the air blast pipe, and is configured to drive the external vacuum pump to evacuate the purification chamber, so that the liquid lead-based coolant inside the liquid storage part rises into the ascending channel under the pressure difference caused by the vacuum extraction. The controller is also configured to control the air blast pipe to introduce a hydrogen-argon mixed gas into the liquid lead-based coolant entering the ascending channel, so that the liquid lead-based coolant mixes with the hydrogen-argon mixed gas and then rises to the guide part, flows through the filter assembly and then enters the descending channel.

2. The purification device for liquid lead-based coolant according to claim 1, characterized in that: Also includes: A liquid level meter, inserted in the top cover and partially located in the liquid storage part, configured to detect the height of the liquid level in the liquid storage part; The controller is also connected to the liquid level meter, and is configured to introduce a hydrogen-argon mixed gas into the ascending channel through the gas blowing pipe when the liquid level detected by the liquid level meter reaches a specified height.

3. The purification device for liquid lead-based coolant according to claim 1, characterized in that: Also includes: A differential pressure transmitter is connected to the purification chamber and the liquid storage part through a first pressure-introducing pipe and a second pressure-introducing pipe respectively, and is configured to detect the pressure difference between the purification chamber and the liquid storage part, wherein the first pressure-introducing pipe is closely inserted in the top of the purification chamber, and is partially located inside the purification chamber, and the second pressure-introducing pipe is inserted in the top cover, and is partially located inside the liquid storage part; The controller is also connected to the differential pressure transmitter, and is configured to adjust the vacuuming intensity of the external vacuum pump and the blowing flow rate of the blowing pipe based on the differential pressure detected by the differential pressure transmitter.

4. The purification device for liquid lead-based coolant according to claim 1, characterized in that: The liquid storage part includes a liquid inlet, a liquid outlet and a supporting base. The liquid inlet is configured to allow liquid lead-based coolant to flow into the liquid storage portion; The drain port is configured to allow the liquid lead-based coolant to flow out of the liquid storage portion; The support base is configured to support the liquid storage portion.

5. The purification device for liquid lead-based coolant according to claim 4, characterized in that: Also includes: The oxygen sensor is inserted on the top cover and partially located inside the liquid storage part, and is configured to detect the dissolved oxygen concentration of the liquid lead-based coolant.

6. The purification device for liquid lead-based coolant according to claim 1, characterized in that: The clean room also includes: The reinforcing rib protrudes from the outer wall of the clean room and contacts the surface of the top cover. The reinforcing rib has a plurality of fixing holes, and the fixing holes are equipped with flanges and lens pads so that the clean room is fixed to the top cover.

7. A purification device for liquid lead-based coolant according to any one of claims 1 to 6, characterized in that: The ascending channel is a circular tube, a vertical square groove, a trapezoidal groove, an inverted trapezoidal groove, or a trumpet-shaped groove whose middle section width is narrower than the section widths at both ends. When the ascending channel is the trumpet-shaped groove, the bottom of the air blast pipe is located at the narrow section width of the trumpet-shaped groove; The descending channel is a circular tube, a vertical square groove or a trapezoidal groove; The guide portion includes a guide plate, and the liquid lead-based coolant flows through the guide plate when entering the descending channel from the ascending channel, wherein: The guide plate is a plane; or The guide plate is an inclined surface, a first end of the inclined surface is adjacent to the ascending channel, a second end of the inclined surface is adjacent to the descending channel, and the first end is higher than the second end.

8. The purification device for liquid lead-based coolant according to claim 1, characterized in that: The gas blowing pipe is inserted at the top of the purification chamber, and the hydrogen content of the hydrogen-argon mixed gas is 5 vol.%; or The air blowing pipe is inserted into the side wall of the purification chamber, and the hydrogen content of the hydrogen-argon mixed gas is greater than or equal to 0.5 vol. % and less than or equal to 20 vol. %.

9. The purification device for liquid lead-based coolant according to claim 7, characterized in that: The filter blocking component comprises: A connecting plate, wherein a fixing groove is provided on the top of the clean room, and the connecting plate is movably embedded in the top of the clean room through the fixing groove; The filter element is connected to the connecting plate, and a width-adjustable gap is provided between the guide plate and the filter element. The width-adjustable gap is a non-blocking filter channel for the liquid lead-based coolant and is configured to adjust the width by pulling the connecting plate in the fixing groove.

10. A method for purifying liquid lead-based coolant, characterized in that: The purification device for liquid lead-based coolant according to any one of claims 1 to 9 comprises: The purification chamber connected to the liquid storage part is evacuated by an external vacuum pump, so that the liquid lead-based coolant inside the liquid storage part rises into the ascending channel of the purification chamber under the pressure difference caused by the vacuuming; If the liquid level of the liquid lead-based coolant in the liquid storage section reaches a specified height, a hydrogen-argon mixed gas is introduced into the ascending channel through an air blowing pipe to reduce the density and pressure of the liquid lead-based coolant in the ascending channel, so that the liquid lead-based coolant rises to the guide section of the purification chamber, flows through the filter assembly located in the guide section, and then enters the descending channel of the purification chamber.

11. The purification method for liquid lead-based coolant according to claim 10, characterized in that: Before introducing the hydrogen-argon mixed gas into the ascending channel, the method further comprises: detecting a pressure difference between the purification chamber and the liquid storage portion; Based on the pressure difference, the vacuuming intensity of the external vacuum pump and the blowing flow rate of the blowing pipe for introducing the hydrogen-argon mixed gas are set.

12. The purification method for liquid lead-based coolant according to claim 10, characterized in that: Also includes: Based on a preset purification requirement level, the width of the gap between the guide plate of the guide portion and the filter element of the filter blocking assembly is set.

13. A computer-readable storage medium, characterized in that: Computer executable instructions are stored, and the computer executable instructions are used to execute the method according to any one of claims 10 to 12.

Images