Glass bead feeding device and method for radioactive waste liquid glass solidification

Abstract

The invention discloses a glass bead feeding device and method for radioactive waste liquid glass solidification, the glass bead feeding device comprises a drying primary screening device, a fine screening device, a storage bin and a discharging device which are sequentially arranged according to the flowing sequence of glass beads, the drying primary screening device comprises a baking box, and a heater is arranged at the top in the baking box; a feeding hopper and a discharging hopper are arranged on the two sides of the baking box respectively, the fine screening device is arranged below the discharging hopper, a primary screening mechanism located between the feeding hopper and the discharging hopper is arranged in the baking box, and the primary screening mechanism is used for primarily screening out glass beads meeting the particle size and conveying the glass beads to the discharging hopper. The screening device has the advantages that the follow-up screening pressure is reduced, the number of times of cleaning the screen is reduced, and the working efficiency and the screening precision are improved.

Description

Technical Field

[0001] This application relates to the field of radioactive waste liquid treatment technology, and in particular to a glass bead feeding device and method for vitrification of radioactive waste liquid. Background Technology

[0002] The principle of Joule-heated ceramic electric furnace vitrification technology is that high-level radioactive waste liquid and glass beads are simultaneously added to the furnace to complete evaporation, drying, calcination, and melting. The molten glass is discharged from the bottom of the furnace into a product container for storage. The glass bead feeding device is one of the key pieces of equipment in radioactive waste liquid vitrification technology. It is connected to the ceramic electric furnace through a feeding pipe, and its main function is to supply a fixed amount of glass beads to the furnace for vitrification with the radioactive waste liquid.

[0003] Existing glass bead feeding devices are prone to problems with poor glass bead feeding during operation. The reasons include high ambient humidity causing glass beads to stick together and glass bead particle size being too large or too small. Currently, a screening mechanism is used to screen out glass beads of the correct particle size for feeding. However, relying solely on the screening mechanism results in high screening pressure and the glass beads can quickly clog the screen holes, requiring frequent machine shutdowns and manual cleaning of the screen, which affects work efficiency. Summary of the Invention

[0004] The main objective of this application is to provide a glass bead feeding device and method for vitrification of radioactive waste liquid, which aims to solve the technical problem that existing glass bead feeding devices rely solely on screening mechanisms to screen glass beads, requiring frequent shutdowns to clean the screens and resulting in low working efficiency.

[0005] To achieve the above objectives, this application provides a glass bead feeding device for vitrification of radioactive waste liquid, including a drying primary screening device, a fine screening device, a storage bin, and a feeding device arranged in sequence according to the glass bead flow order. The drying primary screening device includes a baking oven, a heater is provided at the top of the baking oven, and a feed hopper and a discharge hopper are respectively provided on both sides of the baking oven. The fine screening device is located below the discharge hopper. The baking oven is provided with a primary screening mechanism located between the feed hopper and the discharge hopper. The primary screening mechanism is used to initially screen out glass beads that meet the particle size requirements and transport them to the discharge hopper.

[0006] Optionally, the primary screening mechanism includes a support rod fixed to the bottom of the baking oven, with an inclined plate hinged to the top of the support rod. The left and right sides of the inclined plate are close to the feed hopper and the discharge hopper, respectively, and the front and rear sides of the inclined plate are in contact with the inner wall of the baking oven. A first telescopic cylinder is hinged to one side of the inclined plate, and the other end of the first telescopic cylinder is hinged to the top of the baking oven. A temporary storage chamber is provided in the baking oven near the feed hopper, located below the side end of the inclined plate. Multiple interleaved arc-shaped blocks are slidably arranged on the top surface of the inclined plate. The arc-shaped blocks are used to hold single glass beads, and a detection component is connected to the bottom of the arc-shaped blocks. The detection assembly includes a rotating shaft connected to the bottom of the arc-shaped block and moving through the inclined plate. A limiting sleeve is movably fitted on the rotating shaft. A guide groove is provided on the inclined plate to slide with the limiting sleeve. The sliding direction of the limiting sleeve is parallel to the tilting direction of the inclined plate. A moving block is connected to the bottom of the limiting sleeve and slidably disposed on the bottom surface of the inclined plate. A motor connected to the rotating shaft is installed inside the moving block. A first spring is connected to the side of the moving block away from the feed hopper. A pressure sensor fixed to the bottom surface of the inclined plate is connected to the other end of the first spring. The pressure sensor and the motor are both electrically connected to a controller.

[0007] Optionally, a transition block is provided at the bottom of the baking oven between the side end of the inclined plate and the discharge hopper, and the top surface of the transition block is provided with an inclined surface that slopes downward toward the discharge hopper.

[0008] Optionally, the fine screening device includes a support frame, a screen bed is provided on the top of the support frame, a first screen and a second screen are arranged vertically inside the screen bed, the screen aperture of the second screen is smaller than that of the first screen, a first discharge port flush with the first screen, a second discharge port flush with the second screen and a third discharge port located below the second screen are respectively provided on the side wall of the screen bed, the third discharge port is flush with the bottom of the screen bed, and the second discharge port is located above the storage bin.

[0009] Optionally, an industrial camera is installed at the bottom of the baking oven above the screen bed, and a second telescopic cylinder is installed on the side of the screen bed away from the second discharge port. The second telescopic cylinder extends into the screen bed and is connected to a scraper plate that fits between the first screen and the second screen. Both the second telescopic cylinder and the industrial camera are electrically connected to the controller.

[0010] Optionally, the top of the support frame is connected to the screen bed via multiple second springs, and a vibrator is installed at the bottom of the screen bed.

[0011] Optionally, the feeding device includes a glass hopper connected to a storage bin via a conveying pipeline, a conveying unit connected to the bottom of the glass hopper, a weighing bin connected to the bottom of the conveying unit, a lock chamber connected to the bottom of the weighing bin, and a pneumatic valve connected to the bottom of the lock chamber.

[0012] To achieve the above objectives, this application also provides a glass bead feeding method, based on the above-mentioned glass bead feeding device for vitrification of radioactive waste liquid, comprising the following steps: The tilting plate is tilted toward the discharge hopper by controlling the first telescopic cylinder; A batch of glass beads, the same number as the curved blocks, is added into the baking oven through the feed hopper; After a preset time interval, acquire the pressure data collected by each pressure sensor; Lock the output shaft of the motor corresponding to the same detection component of the pressure sensor whose pressure data is outside the standard pressure range, so as to lock the corresponding rotating shaft; The motor of the same detection component of the pressure sensor, which makes the pressure data within the standard pressure range, drives the corresponding rotating shaft to rotate by a preset angle so that the glass beads of qualified particle size on the corresponding arc block roll along the inclined plate to the discharge hopper, and then the arc block is reset. The first telescopic cylinder controls the inclined plate to tilt towards the feed hopper, so that the remaining glass beads with unqualified particle size on the corresponding arc block roll along the inclined plate to the temporary storage bin, thereby completing the initial screening of the batch of glass beads.

[0013] Optionally, after acquiring the pressure data collected by each pressure sensor, the following steps are also included: Determine if initial pressure data exists; where initial pressure data refers to the pressure data corresponding to the area on the arc-shaped block where no glass beads are present. If so, mark the arc-shaped block corresponding to the initial pressure data; If the pressure data of the marked arc-shaped block changes after the glass beads of qualified particle size roll along the inclined plate to the discharge hopper, the marked arc-shaped block is rotated by a preset angle through the corresponding motor.

[0014] Optionally, the following steps are also included: An industrial camera is used to capture one image of the sieve bed after each batch of glass beads is sieved by the fine sieve device, until N images of the sieve bed are obtained. The positional information of glass beads in each sieve bed image is identified to obtain the number M of target glass beads; where the target glass beads are glass beads that are in the same position in each sieve bed image. If the quantity M is greater than the preset quantity threshold, the second telescopic cylinder is controlled to drive the scraper to perform one reciprocating motion to squeeze out the glass beads blocked in the screen holes of the first and second screens.

[0015] The beneficial effects that this application can achieve are as follows: This application allows for the initial screening of glass beads by adding a batch of glass beads into the drying chamber of the primary screening device via a feed hopper. Glass beads that meet the particle size requirements are then initially screened and conveyed to the discharge hopper. Simultaneously, the glass beads are dried by a heater to reduce adhesion. The glass beads exiting the discharge hopper are then subjected to a secondary screening via a fine screening device, improving screening accuracy. Since the batch of glass beads has already undergone initial screening, the number of glass beads that do not meet the particle size requirements is greatly reduced, thereby significantly reducing the screening workload of the fine screening device. This significantly extends the clogging cycle of the fine screening device's screen holes, reduces the number of shutdowns for cleaning clogged glass beads, and improves work efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0017] Figure 1 This is a schematic diagram of a glass bead feeding device for vitrification of radioactive waste liquid in an embodiment of this application; Figure 2 This is a schematic diagram of the internal structure of the drying and screening device in an embodiment of this application; Figure 3 This is a schematic diagram of the structure of the primary screening mechanism in an embodiment of this application; Figure 4 for Figure 3 A magnified schematic diagram of the partial structure at point A in the middle; Figure 5 This is a schematic diagram of the primary screening mechanism in the baking oven from a top view, as shown in the embodiments of this application. Figure 6 This is a schematic diagram of the structure of the fine screening device in an embodiment of this application; Figure 7 This is a schematic diagram of the internal structure of the fine screening device in an embodiment of this application.

[0018] Figure label: 100-Drying and primary screening device, 110-Baking oven, 120-Heater, 130-Feed hopper, 140-Discharge hopper, 150-Primary screening mechanism, 151-Support rod, 152-Inclined plate, 1521-Guide groove, 153-First telescopic cylinder, 154-Arc block, 155-Detection component, 1551-Rotating shaft, 1552-Limit sleeve, 1553-Moving block, 1554-Motor, 1555-First spring, 1556-Pressure sensor, 160-Temporary storage bin, 170-Transition block 200-Fine screening device, 210-Support frame, 220-Screen bed, 221-First discharge port, 222-Second discharge port, 223-Third discharge port, 230-First screen, 240-Second screen, 250-Second telescopic cylinder, 260-Scraper, 270-Second spring, 280-Vibrator, 300-Storage bin, 400-Discharge device, 410-Glass bin, 420-Conveying unit, 430-Weighing bin, 440-Lock chamber, 450-Pneumatic valve, 500-Conveying pipeline.

[0019] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0021] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0022] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0023] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0024] Example 1 Reference Figures 1-7 This embodiment provides a glass bead feeding device for vitrification of radioactive waste liquid, including a drying primary screening device 100, a fine screening device 200, a storage bin 300, and a feeding device 400 arranged in sequence according to the glass bead flow order. The drying primary screening device 100 includes a baking oven 110, a heater 120 is provided at the top of the baking oven 110, and a feed hopper 130 and a discharge hopper 140 are respectively provided on both sides of the baking oven 110. The fine screening device 200 is located below the discharge hopper 140. A primary screening mechanism 150 is provided in the baking oven 110 between the feed hopper 130 and the discharge hopper 140. The primary screening mechanism 150 is used to initially screen out glass beads that meet the particle size requirements and transport them to the discharge hopper 140.

[0025] In this embodiment, after a batch of glass beads is added to the baking chamber 110 of the drying and screening device 100 through the feed hopper 130, glass beads that meet the particle size requirements can be initially screened and conveyed to the discharge hopper 140. At the same time, the glass beads are dried by the heater 120 to reduce glass bead adhesion. Then, the glass beads coming out of the discharge hopper 140 are screened again by the fine screening device 200, which improves the screening accuracy. At the same time, since the batch of glass beads has been initially screened, the number of glass beads with unqualified particle size is greatly reduced, thereby significantly reducing the screening pressure of the fine screening device 200 on the glass beads. That is, it greatly extends the cycle of clogging of the sieve holes of the fine screening device 200, reduces the number of shutdowns to clean the clogged glass beads, and improves the working efficiency. The glass beads with appropriate particle size coming out of the discharge hopper 140 fall into the storage bin 300 for storage. When it is necessary to add glass beads and radioactive waste liquid to the furnace for mixing, the appropriate amount of glass beads can be extracted from the storage bin 300 by the feeding device 400.

[0026] As an optional implementation, the primary screening mechanism 150 includes a support rod 151 fixed to the bottom of the oven 110. An inclined plate 152 is hinged to the top of the support rod 151. The left and right sides of the inclined plate 152 are close to the feed hopper 130 and the discharge hopper 140, respectively. The front and rear sides of the inclined plate 152 are in contact with the inner wall of the oven 110. A first telescopic cylinder 153 is hinged to one side of the inclined plate 152, and the other end of the first telescopic cylinder 153 is hinged to the top of the oven 110. A temporary storage chamber 160 is located below the side of the inclined plate 152, near the feed hopper 130, inside the oven 110. Multiple interleaved arc-shaped blocks 154 are slidably arranged on the top surface of the inclined plate 152. Each arc-shaped block 154 is used to hold a single glass bead. A detection component 155 is connected to the bottom of each arc-shaped block 154. The detection component 155 includes a connecting... A rotating shaft 1551 is located at the bottom of the arc-shaped block 154 and moves through the inclined plate 152. A limiting sleeve 1552 is movably fitted on the rotating shaft 1551. A guide groove 1521 is provided on the inclined plate 152 to slide with the limiting sleeve 1552. The sliding direction of the limiting sleeve 1552 is parallel to the tilting direction of the inclined plate 152. A moving block 1553 is connected to the bottom of the limiting sleeve 1552 and is slidably disposed on the bottom surface of the inclined plate 152. A motor 1554 connected to the rotating shaft 1551 is provided inside the moving block 1553. A first spring 1555 is connected to the side of the moving block 1553 away from the feed hopper 130. A pressure sensor 1556 fixed to the bottom surface of the inclined plate 152 is connected to the other end of the first spring 1555. The pressure sensor 1556 and the motor 1554 are both electrically connected to a controller (not shown in the figure).

[0027] In this embodiment, in the initial state, the inclined plate 152 is tilted towards the discharge hopper 140 under the action of the first telescopic cylinder 153. When a batch of glass beads falls onto the inclined plate 152 through the feed hopper 130, the glass beads can roll down along the tilt direction of the inclined plate 152 and be intercepted sequentially by multiple arc-shaped blocks 154. The staggered arrangement of the arc-shaped blocks 154 has a good interception effect on the glass beads and a high interception rate. At the same time, the multiple arc-shaped blocks 154 also play a role in separating the adhered glass beads. Furthermore, due to the blocking effect of the multiple arc-shaped blocks 154, the rolling time of the glass beads on the inclined plate 152 is prolonged. Compared with the method of directly and quickly passing through the baking oven 110, this improves the quality of the glass beads. The drying effect is achieved when most of the glass beads are intercepted by the corresponding arc-shaped block 154 (a small number of unintercepted glass beads may roll directly to the discharge hopper 140 and undergo secondary screening by the subsequent fine screening device 200). At this time, under the action of the gravity component of the glass beads, a force is generated on the arc-shaped block 154 in the tilting direction of the inclined plate 152, causing the arc-shaped block 154 to move a corresponding distance in the tilting direction of the inclined plate 152, thereby driving the detection component 155 at the bottom of the arc-shaped block 154 to move synchronously. At this time, the limiting sleeve 1552 slides along the guide groove 1521, and at the same time, the moving block 1553 squeezes the first spring 1555, so that the pressure sensor 1556 detects the corresponding pressure data. Here, it can be set that... A standard pressure range is defined (corresponding to glass beads of suitable particle size). If the pressure data is greater than the maximum value of the standard pressure range, it indicates that the curved block 154 is currently intercepting heavier, larger-diameter glass beads. If the pressure data is less than the minimum value of the standard pressure range, it indicates that the curved block 154 is currently intercepting lighter, smaller-diameter glass beads. For glass beads whose pressure data falls within the standard pressure range, the corresponding pressure sensor 1556 can send a feedback signal to the controller, thereby controlling the corresponding motor 1554 to start, driving the corresponding rotating shaft 1551 and the curved block 154 to rotate synchronously by a certain angle (90°~180°), thus releasing all glass beads of suitable particle size. The glass beads are rolled to the discharge hopper 140. Since other arc blocks 154 have already intercepted glass beads with larger or smaller diameters, the glass beads with a suitable diameter will not be intercepted by other arc blocks 154 as they roll down. After all the glass beads with a suitable diameter are released, the corresponding motor 1554 drives the arc block 154 to reset. Then, the first telescopic cylinder 153 drives the inclined plate 152 to rotate and tilt towards the temporary storage bin 160. At this time, the glass beads with larger or smaller diameters intercepted on the remaining arc blocks 154 will automatically roll into the temporary storage bin 160 for storage, thus completing the initial screening process of the batch of glass beads. Then, the inclined plate 152 is driven to reset to perform the initial screening of the next batch of glass beads.In summary, based on the configuration of the primary screening mechanism 150 in this embodiment, the drying primary screening device 100 not only achieves good screening effect on glass beads, but also unexpectedly and significantly improves the separation effect of adhering glass beads through the impact of multiple inclined plates 152 on the glass beads and the extension of the drying time of the glass beads, achieving multiple benefits in one fell swoop.

[0028] As an optional implementation, a transition block 170 is provided at the bottom of the oven 110 between the side end of the inclined plate 152 and the discharge hopper 140. The top surface of the transition block 170 is provided with an inclined surface that slopes downward toward the discharge hopper 140. The front and rear side walls of the transition block 170 should fit against the inner wall of the oven 110.

[0029] In this embodiment, when the glass beads roll down from the inclined plate 152, they can be directly transferred to the discharge hopper 140 through the transition block 170 and discharged into the fine screening device 200. At the same time, it prevents the glass beads from being bounced back to the bottom of the baking oven 110 due to excessive inertia, so as to ensure the smooth discharge of the glass beads.

[0030] As an optional implementation, the fine screening device 200 includes a support frame 210, a screen bed 220 is provided on the top of the support frame 210, and a first screen 230 and a second screen 240 are arranged vertically inside the screen bed 220. The screen aperture of the second screen 240 is smaller than that of the first screen 230. The side wall of the screen bed 220 is provided with a first discharge port 221 flush with the first screen 230, a second discharge port 222 flush with the second screen 240, and a third discharge port 223 located below the second screen 240. The third discharge port 223 is flush with the bottom of the screen bed 220, and the second discharge port 222 is located above the storage bin 300.

[0031] In this embodiment, when the glass beads come out of the discharge hopper 140, they first fall onto the first screen 230 of the sieve bed 220. Large-diameter glass beads are blocked on the first screen 230 and discharged through the first discharge port 221 for collection. The remaining glass beads pass through the first screen 230 and fall onto the second screen 240. Small-diameter glass beads pass through the second screen 240 and are discharged through the third discharge port 223 for collection. Glass beads of moderate size remain on the second screen 240 and are discharged into the storage bin 300 through the second discharge port 222, thereby completing the fine sieving process of the glass beads.

[0032] As an optional implementation, an industrial camera is provided at the bottom of the baking oven 110 above the sieve bed 220. A second telescopic cylinder 250 is provided on the side of the sieve bed 220 away from the second discharge port 222. The second telescopic cylinder 250 extends into the sieve bed 220 and is connected to a scraper 260 that fits between the first screen 230 and the second screen 240. Both the second telescopic cylinder 250 and the industrial camera are electrically connected to the controller.

[0033] In this embodiment, since glass beads may clog the sieve holes of the first screen 230, timely cleaning is required when there is a large amount of clogging. Here, an industrial camera can capture image information of the screen bed 220 to identify the number of glass beads clogging the first screen 230. If the number exceeds a preset number, the second telescopic cylinder 250 can drive the scraper 260 to move back and forth once, thereby squeezing the glass beads on the first screen 230 upward and squeezing the glass beads that may be clogging the second screen 240 downward, thus cleaning both the first screen 230 and the second screen 240 at the same time. Here, machine vision recognition technology is used to determine the cleaning node, and automatic cleaning can be performed by the second telescopic cylinder 250 and the scraper 260 without human management.

[0034] As an optional implementation, the top of the support frame 210 is connected to the screen bed 220 via multiple second springs 270. The bottom of the screen bed 220 is equipped with a vibrator 280 (which can be a vibration motor). Under the combined action of the vibrator 280 and the second springs 270, the screen bed 220 is driven to vibrate up and down, thereby improving the screening effect.

[0035] As an optional implementation, the feeding device 400 includes a glass hopper 410 connected to the storage hopper 300 via a conveying pipeline 500. The bottom of the glass hopper 410 is connected to a conveying unit 420, the bottom of the conveying unit 420 is connected to a weighing hopper 430, the bottom of the weighing hopper 430 is connected to a lock chamber 440, and the bottom of the lock chamber 440 is connected to a pneumatic valve 450.

[0036] In this embodiment, glass beads in storage bin 300 are conveyed to glass hopper 410 via conveying pipeline 500 (which may be pneumatic conveying). The glass beads in glass hopper 410 are then conveyed to weighing bin 430 by conveying unit 420. After weighing, they are stored in lock chamber 440. When the controller sends a glass bead feeding signal, pneumatic valve 450 opens, and the glass beads are supplied to the furnace. Therefore, after the glass beads are dried, sieved, and weighed, they are fed to the furnace. By controlling the glass bead feeding accuracy, the glass curing formula is realized, ensuring the ratio of glass beads to radioactive waste liquid, thereby controlling the quality of the glass curing product. Furthermore, the feeding device 400 also has airtightness assurance. The lock chamber 440 separates the feeding device 400 from the upper air chamber of the furnace, preventing volatile and semi-volatile substances and aerosol particles from entering the feeding device 400.

[0037] Example 2 To achieve the above objectives, refer to Figures 1-7 This embodiment also provides a glass bead feeding method, based on a glass bead feeding device for vitrification of radioactive waste liquid in the above embodiment, including the following steps: The first telescopic cylinder 153 controls the tilting plate 152 to tilt toward the discharge hopper 140; A batch of glass beads, the same number as the arc-shaped blocks 154, is added into the baking oven 110 through the feed hopper 130. After a preset time interval, acquire the pressure data collected by each pressure sensor 1556; The output shaft of the motor 1554 of the same detection component 155 is locked to lock the corresponding rotating shaft 1551. The pressure sensor 1556 whose pressure data is not within the standard pressure range is locked to lock the corresponding rotating shaft 1551. The pressure sensor 1556, which is within the standard pressure range, is connected to a motor 1554 of the same detection component 155, which drives the corresponding rotating shaft 1551 to rotate by a preset angle so that the glass beads of qualified particle size on the corresponding arc block 154 roll along the inclined plate 152 to the discharge hopper 140, and then the arc block 154 is reset. The first telescopic cylinder 153 controls the inclined plate 152 to tilt towards the feed hopper 130, so that the remaining glass beads with unqualified particle size on the corresponding arc block 154 roll along the inclined plate 152 to the temporary storage bin 160, thereby completing the initial screening of the batch of glass beads.

[0038] In this embodiment, after adding a batch of glass beads to the baking oven 110 and allowing a preset time interval, most of the glass beads are intercepted by the corresponding arc-shaped block 154. Under the influence of the gravitational force of the glass beads, a force is generated on the arc-shaped block 154 in the tilting direction of the inclined plate 152, causing the arc-shaped block 154 to move a corresponding distance in the tilting direction of the inclined plate 152. This causes the detection component 155 at the bottom of the arc-shaped block 154 to move synchronously. At this time, the limiting sleeve 1552 slides along the guide groove 1521, and the moving block 1553 presses the first spring 1555, thereby causing the pressure sensor 1556 to detect the corresponding pressure data. A standard can be set here. The pressure range (corresponding to glass beads with a suitable particle size range) determines whether the intercepted glass beads are heavy or small. If the pressure data exceeds the maximum value of the standard pressure range, it indicates that the curved block 154 is intercepting heavier, larger-diameter glass beads. If the pressure data is less than the minimum value of the standard pressure range, it indicates that the curved block 154 is intercepting lighter, smaller-diameter glass beads. For glass beads with pressure data within the standard pressure range, the corresponding pressure sensor 1556 sends a feedback signal to the controller, thereby controlling the corresponding motor 1554 to start and drive the corresponding rotating shaft 1551 and the curved block 154 to rotate synchronously by a preset angle (90°~180°), thus intercepting the glass beads with a suitable particle size range. All glass beads of suitable size are released and rolled into the discharge hopper 140. Since other curved blocks 154 have already intercepted glass beads that are too large or too small, glass beads of suitable size will not be intercepted by other curved blocks 154 as they roll downwards. At the same time, the output shaft of the motor 1554 of the pressure sensor 1556 corresponding to the same detection component 155 is locked, so when glass beads of suitable size collide with other glass beads of unqualified size as they roll downwards, causing the corresponding pressure sensor 1556 to detect a change in pressure data, it will not trigger the corresponding curved block 154 to rotate, thus ensuring that... While maintaining the locked state, after all glass beads of suitable size have been released, the corresponding motor 1554 drives the arc block 154 to reset. Then, the first telescopic cylinder 153 drives the inclined plate 152 to rotate towards the temporary storage chamber 160. At this time, the glass beads with larger or smaller sizes intercepted on the remaining arc block 154 will automatically roll into the temporary storage chamber 160 for storage (a baffle valve can be set at the bottom of the temporary storage chamber 160 to facilitate the subsequent centralized discharge and transfer of glass beads), thus completing the initial screening process of a batch of glass beads. Then, the inclined plate 152 is reset, and the previously locked motor 1554 is unlocked to facilitate the initial screening of the next batch of glass beads.

[0039] As an optional implementation, after acquiring the pressure data collected by each pressure sensor 1556, the following steps are also included: Determine whether initial pressure data exists; where initial pressure data is the pressure data corresponding to the area on the arc block 154 where no glass beads are contained. If so, mark the arc block 154 corresponding to the initial pressure data; If the pressure data of the marked arc block 154 changes after the glass beads of qualified particle size are rolled along the inclined plate 152 to the discharge hopper 140, the marked arc block 154 is controlled to rotate by a preset angle by the corresponding motor 1554.

[0040] In this embodiment, since there may be a very small number of empty arc blocks 154 that do not intercept glass beads, and glass beads of suitable size are intercepted by empty arc blocks 154 during their downward rolling, the initial pressure data that has not changed can be detected, and the arc block 154 corresponding to the initial pressure data can be marked. By detecting whether the pressure data corresponding to the marked arc block 154 changes after the glass beads of suitable size roll along the inclined plate 152 to the discharge hopper 140, if so, it means that the rolling glass beads have been intercepted. At this time, the marked arc block 154 can be rotated by a preset angle by the corresponding motor 1554, thereby preventing the accidental interception of glass beads of suitable size and improving the screening accuracy.

[0041] As an optional implementation, the following steps are also included: An industrial camera is used to capture an image of the sieve bed after each batch of 200 pairs of glass beads is sieved by the fine sieve device, until N images of the sieve bed are obtained. The positional information of glass beads in each sieve bed image is identified to obtain the number M of target glass beads; where the target glass beads are glass beads that are in the same position in each sieve bed image. If the quantity M is greater than the preset quantity threshold, the second telescopic cylinder 250 is controlled to drive the scraper 260 to perform a reciprocating motion to squeeze out the glass beads blocked in the sieve holes of the first screen 230 and the second screen 240.

[0042] In this embodiment, an industrial camera captures an image of the sieve bed after each batch of glass beads is sieved by the fine sieve device 200, until N sieve bed images are obtained. By comparing the position information of the glass beads in each sieve bed image, the target glass beads whose position has not changed in each sieve bed image can be identified as glass beads blocking the corresponding sieve hole. Here, a quantity threshold is set. When the number M of target glass beads is greater than the quantity threshold, the second telescopic cylinder 250 is activated to drive the scraper 260 to perform a reciprocating motion, thereby squeezing out the glass beads in the sieve holes of the first screen 230 and the second screen 240 at the same time. Combined with machine vision recognition technology, the cleaning node is determined to avoid frequent cleaning. Moreover, the second telescopic cylinder 250 and the scraper 260 can perform automatic cleaning without human management.

[0043] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A glass bead feeding device for vitrification of radioactive waste liquid, characterized in that, The device includes a drying primary screening device, a fine screening device, a storage bin, and a feeding device arranged in sequence according to the flow order of the glass beads. The drying primary screening device includes a baking oven with a heater at the top. A feed hopper and a discharge hopper are respectively arranged on both sides of the baking oven. The fine screening device is located below the discharge hopper. The baking oven has a primary screening mechanism located between the feed hopper and the discharge hopper. The primary screening mechanism is used to initially screen out glass beads that meet the particle size requirements and transport them to the discharge hopper.

2. The glass bead feeding device for vitrification of radioactive waste liquid as described in claim 1, characterized in that, The primary screening mechanism includes a support rod fixed to the bottom of the baking oven. An inclined plate is hinged to the top of the support rod. The left and right sides of the inclined plate are close to the feed hopper and discharge hopper, respectively. The front and rear sides of the inclined plate are in contact with the inner wall of the baking oven. A first telescopic cylinder is hinged to one side of the inclined plate, and the other end of the first telescopic cylinder is hinged to the top of the baking oven. A temporary storage chamber is located below the side end of the inclined plate, near the feed hopper inside the baking oven. Multiple interlocking arc-shaped blocks are slidably arranged on the top surface of the inclined plate. These arc-shaped blocks are used to hold single glass beads. A detection component is connected to the bottom of each arc-shaped block for detection. The component includes a rotating shaft connected to the bottom of the arc-shaped block and moving through the inclined plate. A limiting sleeve is movably fitted on the rotating shaft. A guide groove is provided on the inclined plate to slide with the limiting sleeve. The sliding direction of the limiting sleeve is parallel to the tilting direction of the inclined plate. A moving block is connected to the bottom of the limiting sleeve and slidably disposed on the bottom surface of the inclined plate. A motor connected to the rotating shaft is installed inside the moving block. A first spring is connected to the side of the moving block away from the feed hopper. A pressure sensor fixed to the bottom surface of the inclined plate is connected to the other end of the first spring. The pressure sensor and the motor are both electrically connected to a controller.

3. The glass bead feeding device for vitrification of radioactive waste liquid as described in claim 2, characterized in that, The bottom of the baking oven is equipped with a transition block located between the side end of the inclined plate and the discharge hopper. The top surface of the transition block is provided with an inclined surface that slopes downward toward the discharge hopper.

4. The glass bead feeding device for vitrification of radioactive waste liquid as described in claim 2, characterized in that, The fine screening device includes a support frame, a screen bed is set on the top of the support frame, and a first screen and a second screen are arranged vertically inside the screen bed. The screen aperture of the second screen is smaller than that of the first screen. The side wall of the screen bed is respectively provided with a first discharge port flush with the first screen, a second discharge port flush with the second screen, and a third discharge port located below the second screen. The third discharge port is flush with the bottom of the screen bed, and the second discharge port is located above the storage bin.

5. The glass bead feeding device for vitrification of radioactive waste liquid as described in claim 4, characterized in that, An industrial camera is installed at the bottom of the baking oven above the screen bed. A second telescopic cylinder is installed on the side of the screen bed away from the second discharge port. The second telescopic cylinder extends into the screen bed and is connected to a scraper plate that fits between the first screen and the second screen. Both the second telescopic cylinder and the industrial camera are electrically connected to the controller.

6. The glass bead feeding device for vitrification of radioactive waste liquid as described in claim 4, characterized in that, The top of the support frame is connected to the screen bed via multiple second springs, and a vibrator is installed at the bottom of the screen bed.

7. A glass bead feeding device for vitrification of radioactive waste liquid as described in any one of claims 1-6, characterized in that, The feeding device includes a glass hopper connected to a storage bin via a conveying pipeline. A conveying unit is connected to the bottom of the glass hopper. A weighing bin is connected to the bottom of the conveying unit. A lock chamber is connected to the bottom of the weighing bin. A pneumatic valve is connected to the bottom of the lock chamber.

8. A method for feeding glass beads, characterized in that, The glass bead feeding device for vitrification of radioactive waste liquid as described in claim 5 includes the following steps: The tilting plate is tilted toward the discharge hopper by controlling the first telescopic cylinder; A batch of glass beads, the same number as the curved blocks, is added into the baking oven through the feed hopper; After a preset time interval, acquire the pressure data collected by each pressure sensor; Lock the output shaft of the motor corresponding to the same detection component of the pressure sensor whose pressure data is outside the standard pressure range, so as to lock the corresponding rotating shaft; The motor of the same detection component of the pressure sensor, which makes the pressure data within the standard pressure range, drives the corresponding rotating shaft to rotate by a preset angle so that the glass beads of qualified particle size on the corresponding arc block roll along the inclined plate to the discharge hopper, and then the arc block is reset. The first telescopic cylinder controls the inclined plate to tilt towards the feed hopper, so that the remaining glass beads with unqualified particle size on the corresponding arc block roll along the inclined plate to the temporary storage bin, thereby completing the initial screening of the batch of glass beads.

9. A glass bead feeding method as described in claim 8, characterized in that, After acquiring the pressure data collected by each pressure sensor, the following steps are also included: Determine if initial pressure data exists; where initial pressure data refers to the pressure data corresponding to the area on the arc-shaped block where no glass beads are present. If so, mark the arc-shaped block corresponding to the initial pressure data; If the pressure data of the marked arc-shaped block changes after the glass beads of qualified particle size roll along the inclined plate to the discharge hopper, the marked arc-shaped block is rotated by a preset angle through the corresponding motor.

10. A glass bead feeding method as described in claim 8, characterized in that, It also includes the following steps: An industrial camera is used to capture one image of the sieve bed after each batch of glass beads is sieved by the fine sieve device, until N images of the sieve bed are obtained. The positional information of glass beads in each sieve bed image is identified to obtain the number M of target glass beads; where the target glass beads are glass beads that are in the same position in each sieve bed image. If the quantity M is greater than the preset quantity threshold, the second telescopic cylinder is controlled to drive the scraper to perform one reciprocating motion to squeeze out the glass beads blocked in the screen holes of the first and second screens.

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