Fully automatic glass bead production line for vitrification of radioactive nuclear waste

Abstract

The present disclosure provides a fully automatic glass bead production line for vitrifying radioactive nuclear waste, and relates to the technical field of glass bead preparation. The fully automatic production line comprises a control system, and a batching system, a melting furnace, a pressing die, a fire polishing device, and a cooling and cleaning device which are arranged in sequence. The batching system is configured to mix multiple raw materials to form a batch. The melting furnace is configured to melt, homogenize, and refine the batch. The pressing die is configured to press the molten batch into bead blanks. The fire polishing device is configured to fire polish the bead blanks. The cooling and cleaning device is configured to cool and clean fire polished products.The control system controls the operations of the batching system, the melting furnace, the pressing die, the fire polishing device, and the cooling and cleaning device. Abstract Fig.: Fig. 1.

Description

Title of the invention: Fully automatic production line of glass beads for vitrification of radioactive nuclear waste Technical field

[0001] The present disclosure relates to the technical field of glass bead preparation, in particular a fully automatic glass bead manufacturing line for the vitrification of radioactive nuclear waste. BACKGROUND

[0002] The development and use of nuclear energy have greatly contributed to the progress of human society, but waste, namely radioactive nuclear waste, may also be produced. The safe treatment and disposal of radioactive nuclear waste is the "last mile" in the development and use of nuclear energy. Currently, in radioactive nuclear waste treatment processes, vitrification is the only industrialized treatment process. In practical vitrification engineering applications, in order to ensure safe operations, glass products for vitrification must be introduced into a remote melting furnace, so the glass products must be prepared in the form of glass beads.For the preparation of glass beads used in radioactive nuclear waste, raw materials generally need to be mixed, melted, formed, and processed to form final products. The prior art production line has a low degree of automation and high labor cost. Thus, it is urgent to find a new solution to solve the above-mentioned problems. Statement of the invention

[0003] The purpose of the present disclosure is to provide a fully automatic glass bead manufacturing line for vitrification of radioactive nuclear waste so as to solve the problems of the prior art, so that efficient production is realized, and product quality and production efficiency are ensured.

[0004] To achieve the above-mentioned objective, the present disclosure provides the following solution.

[0005] The present disclosure provides a fully automatic glass bead production line for vitrifying radioactive nuclear waste, comprising a control system, and a batching system, a melting furnace, a pressing die, a fire polishing device, and a cooling and cleaning device which are arranged in sequence. The batching system is configured to mix multiple raw materials to form a batch. The melting furnace is configured to melt, homogenize, and refine the batch. The pressing die is configured to press a molten batch into ball blanks. The fire polishing device is configured to fire polish the ball blanks. The cooling and cleaning device is configured to cool and clean fire polished products. The control system is configured to control the operations of the batching system, the melting furnace, the pressing die, the fire polishing device, and the cooling and cleaning device.

[0006] Preferably, the batching system comprises at least one oxide batching tank, an oxide conveyor belt, a batch mixing bin, and a temporary batch storage tank. The oxide batching tank is configured to accommodate raw materials. Multiple oxide batching tanks are provided. The oxide conveyor belt is arranged horizontally. The oxide batching tanks are sequentially arranged above the oxide conveyor belt. The oxide batching tanks are capable of discharging a quantitative amount of raw materials onto the oxide conveyor belt. One end of the oxide conveyor belt extends toward the batch mixing bin and transports the raw materials to the batch mixing bin for mixing.The temporary batch storage tank is designed to receive a mix discharged from the batch mixing bin and temporarily store the mix.

[0007] Preferably, an electric melting furnace is provided as the melting furnace. A batch conveyor belt is disposed between a discharge port of the batching system and a feed port of the electric melting furnace. The batch conveyor belt is configured to transport the batch to the electric melting furnace.

[0008] Preferably, the pressing die is configured to receive materials discharged from a discharge port of the melting furnace and press the materials into ball blanks.

[0009] Preferably, the fully automatic production line further comprises a glass bead blank turntable and a rapid component detection system. The glass bead blank turntable is configured to receive the glass bead blanks output from the pressing die and temporarily store the glass bead blanks. The rapid component detection system is configured for sampling from the glass bead blank turntable for inspection. If components are detected as qualified, the glass bead blanks in the glass bead blank turntable continue to circulate. Otherwise, the glass bead blanks in the glass bead blank turntable that do not meet the requirements are treated as unqualified products.

[0010] Preferably, the fully automatic production line further comprises a crusher, where multiple bead blanks formed by pressing die are joined into a set. The bead blanks on the glass bead blank turntable can be transported to the crusher for crushing. The crushed products are delivered to the fire polishing device for fire polishing.

[0011] Preferably, the fully automatic production line further comprises a ground product conveying channel, at least one temporary ground product storage tank, a ground product hopper, and a screw conveyor. The ball blanks ground by the crusher are conveyed to the temporary ground product storage tank for temporary storage via the ground product conveying channel. The ground product hopper is arranged at a discharge port of the temporary ground product storage tank. A feed port of the screw conveyor is arranged below a leak port of the ground product hopper. The feed port of the screw conveyor extends toward the fire polishing device.

[0012] Preferably, the fire polishing device comprises an insulating agent storage tank, a ground product and insulating agent mixer, and a fire polishing furnace. The feed port of the screw conveyor extends toward the ground product and insulating agent mixer. The insulating agent is stored in the insulating agent storage tank. The insulating agent storage tank is configured to introduce a quantitative amount of the insulating agent into the ground product and insulating agent mixer. A mixture formed by the ground product and insulating agent mixer is delivered into the fire polishing furnace for fire polishing.

[0013] Preferably, the cooling and cleaning device comprises a fire-polished product cooler, a cleaning tube, a drying tube, a finished product hopper, and a screen which are sequentially arranged. The products fire-polished by the fire-polishing device are sequentially discharged into the fire-polished product cooler for cooling, the cleaning tube for cleaning, and the drying tube for drying. The dried products are discharged into the finished product hopper and discharged onto the screen. The finished products are screened by the screen.

[0014] Preferably, the temporary storage tank for crushed products is configured with a dosing function.

[0015] Compared with the prior art, the present disclosure achieves the following technical effects.

[0016] In the present disclosure, the operations of the batching system, the melting furnace, the pressing die, the fire polishing device, and the cooling and cleaning device are controlled by the control system, so that the degree of automation is improved, efficient production is achieved, and product quality and production efficiency are ensured.

[0017] In the present disclosure, digital recording can be performed to ensure controllability of glass bead production; and finally, unmanned operation and 24-hour remote control are realized. Brief Description of the Drawings

[0018] To better illustrate the present embodiments of the present disclosure or the technical solution in the prior art, the following briefly presents the attached figures for use in the present embodiment. Obviously, the drawings attached to the following description only represent some embodiments of the present disclosure, and the person skilled in the art can obtain other drawings from these attached drawings without creative effort.

[0019] [Fig. 1] is a schematic diagram of the components required for a front-end portion of a fully automatic glass bead production line for vitrification of radioactive nuclear waste provided in one embodiment of the present disclosure.

[0020] [Fig.2] is a schematic diagram of the components required for a back-end portion of a fully automatic glass bead production line for vitrification of radioactive nuclear waste provided in one embodiment of the present disclosure.

[0021] Reference signs: 1, raw material warehouse; 2, oxide batching tank; 3, oxide conveyor belt; 4, batch mixing bin; 5, batch temporary storage tank; 6, batch conveyor belt; 7, melting furnace; 8, melting furnace discharge port; 9, pressing die; 10, glass bead blank turntable; 11, bead blank conveyor belt; 12, crusher; 13, ground product conveying channel; 14, ground product temporary storage tank; 15, ground product hopper; 16, screw conveyor; 17, insulation agent storage tank; 18, ground product and insulation agent mixer; 19, fire polishing furnace; 20, fire polishing product cooler; 21, cleaning tube; 22, drying tube; 23, finished product hopper; and 24, screen. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following clearly and comprehensively describes the technical solutions of the embodiments of the present disclosure, with reference to the embodiments of the present disclosure. Obviously, the described embodiments are only part, and not all, of the embodiments of the present disclosure. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technical personnel of the art, without creative contribution, fall within the scope protected by this disclosure.

[0023] The purpose of the present disclosure is to provide a fully automatic glass bead manufacturing line for vitrification of radioactive nuclear waste so as to solve the problems of the prior art, so that efficient production is realized, and product quality and production efficiency are ensured.

[0024] In order to make the objective, characteristics and advantages of the present disclosure more clear and understandable, the present disclosure is described in more detail below, with reference to the attached figures and specific embodiments.

[0025] The present disclosure provides a fully automatic glass bead production line for vitrifying radioactive nuclear waste. As shown in [Fig.l] and [Fig.2], the fully automatic production line comprises a control system, and a batching system, a melting furnace 7, a pressing die 9, a fire polishing device, and a cooling and cleaning device which are arranged in sequence. The batching system is configured to mix multiple raw materials to form a batch. The melting furnace 7 is configured to melt, homogenize, and refine the batch. The pressing die 9 is configured to press the molten batch into bead blanks. The fire polishing device is configured to fire polish the bead blanks. The cooling and cleaning device is configured to cool and clean fire polished products.The control system controls the operations of the batching system, the melting furnace 7, the pressing die 9, the fire polishing device and the cooling and cleaning device.

[0026] The present disclosure enables automatic production of glass bead products required for vitrification of radioactive nuclear waste engineering, namely glass beads, and the glass beads provide raw materials for vitrification of radioactive nuclear waste engineering.

[0027] The formula design and control logic are input into the control system in advance. According to the formula design, the batching system is controlled to perform batching. The batching system, the melting furnace 7, the pressing die 9, the fire polishing device, and the cooling and cleaning device are all equipped with power systems. The control system controls the operations of the batching system, the melting furnace 7, the pressing die 9, the fire polishing device, and the cooling and cleaning device according to the control logic.

[0028] According to the fully automatic production line, the batching system, the melting furnace 7, the pressing die 9, the fire polishing device, and the Cooling and cleaning devices are controlled by the control system, so that the degree of automation is improved, efficient production is realized, and product quality and production efficiency are ensured.

[0029] In some embodiments, the batching system comprises at least one oxide batching tank 2, an oxide conveyor belt 3, a batch mixing bin 4, and a batch temporary storage tank 5. The oxide batching tank 2 is configured to receive raw materials. Multiple oxide batching tanks 2 are provided. The oxide conveyor belt 3 is arranged horizontally. The oxide batching tanks 2 are sequentially arranged above the oxide conveyor belt 3. The oxide batching tanks 2 are capable of discharging a quantitative amount of raw materials onto the oxide conveyor belt 3. One end of the oxide conveyor belt 3 extends toward the batch mixing bin and transports the raw materials to the batch mixing bin 4 for mixing.Batch 5 temporary storage tank is designed to receive a mix discharged from Batch 4 mixing bin and temporarily store the mix.

[0030] More specifically, a metering container is arranged at the lower part of the oxide batching tank 2. The materials in the oxide batching tank 2 fall into the metering container by gravity or under the drive of a driving member. When the weight of the materials in the metering container reaches a predetermined weight, a valve on the oxide batching tank 2 is closed, and the materials are discharged to the oxide conveyor belt 3 by automatically opening a bottom plate of the metering container. The weighing error of the metering container should be less than 0.1%, and the oxide batching tanks 2 should be arranged in such an order that large-sized raw materials and small-sized raw materials are placed at intervals to ensure homogeneous mixing of all the materials.

[0031] The batch mixing tank 4 is formed into a horizontal mixer, and the horizontal mixer mixes the glass batch. If water is needed, the control system controls the start of a sprayer in the mixer. Engineers input the parameters such as the amount of water, the water temperature, and the water pressure of the sprayer into the control system. The mixing time is about 5 to 10 min. After mixing, the uniformity of the mixed batch is measured, and once the uniformity index is satisfied, the next step is performed.

[0032] In some embodiments, an electric melting furnace is provided as the melting furnace 7. A batch conveyor belt 6 is disposed between a discharge port of the batching system and a feed port of the melting furnace. electric. Batch conveyor belt 6 is configured to transport the batch to the electric melting furnace.

[0033] The electric melting furnace carries out the processes of melting, homogenization, and refining the batch of glass.

[0034] The control system can ensure the establishment of a cold plug at an upper part of the melting furnace according to the discharge speed of a melting furnace discharge port 8, the temperature of the cold plug of the melting furnace, the temperature of molten glass in the melting furnace 7 and the transmission speed of the batch conveyor belt 6, so that the volatilization of elements during the melting process of the glass batch is avoided, which may cause oxide loss and serious pollution of the environment by dust.

[0035] More specifically, a measuring device for the molten glass discharge speed is arranged at the discharge port of the melting furnace 7 to monitor the discharge speed and the discharge amount of molten glass in real time. The metering device cooperates with a measuring device for the molten glass temperature and the temperature of the cold plug inside the melting furnace 7 to adjust the speed and transmission mode of the batch conveyor belt 6, so that the establishment of the cold plug in the melting furnace 7 is ensured.

[0036] In some embodiments, the pressing die 9 is configured to receive materials discharged from a discharge port of the melting furnace 7 and press the materials into bead blanks. The pressing die 9 presses the glass into spherical / hemispherical bead blanks to prepare the glass beads, and the pressing speed of the die is coordinated with the flow rate of the discharge port to ensure efficient pressing of the glass and avoid the generation of semi-finished products.

[0037] In some embodiments, the fully automatic production line further comprises a glass bead blank turntable 10 and a rapid component detection system. The glass bead blank turntable 10 is configured to receive the bead blanks output from the pressing die 9 and temporarily store the bead blanks. The rapid component detection system is configured for sampling from the glass bead blank turntable 10 for inspection. If components are detected as qualified, the glass bead blanks in the glass bead blank turntable 10 continue to circulate. Otherwise, the glass bead blanks in the glass bead blank turntable 10 that do not meet the requirements are treated as unqualified products.

[0038] In some embodiments, the fully automatic production line further comprises a crusher 12. A plurality of ball blanks formed by the pressing die 9 are joined into a set. The ball blanks on the plate rotating glass bead blank conveyor 10 can be transported to the crusher 12 for crushing. The crushed products are delivered to the fire polishing device for fire polishing. More specifically, the glass bead blank products whose components are detected as qualified are transported to the crusher 12 by a glass bead blank conveyor belt 11.

[0039] In some embodiments, the fully automatic production line further comprises a ground product conveying channel 13, at least one temporary ground product storage tank 14, a ground product hopper 15, and a screw conveyor 16. The ground ball blanks, ground by the crusher 12, are conveyed to the temporary ground product storage tanks 14 for temporary storage via the ground product conveying channel 13. The ground product hopper 15 is disposed at a discharge port of the temporary ground product storage tank 14. A feed port of the screw conveyor 16 is disposed below a leak port of the ground product hopper 15. The feed port of the screw conveyor 16 extends toward the fire polishing device.

[0040] More specifically, the ground product conveying channel 13 is configured with a screening function. A wall surface of the ground product conveying channel 13 is designed as a sieve with a pore size within the minimum particle size range of the required glass bead products, and the particles in the ground glass bead blank products are screened. Furthermore, the glass bead blank products that meet the requirements are conveyed to the ground product temporary storage tanks 14.

[0041] The temporary crushed product storage tanks 14 temporarily store the crushed glass bead blanks, and are configured with a dosing function to measure the real-time output of the glass bead blanks, so that production monitoring capability is ensured.

[0042] In some embodiments, the fire polishing device includes an insulating agent storage tank 17, a ground product and insulating agent mixer 18, and a fire polishing furnace 19. The feed port of the screw conveyor 16 extends toward the ground product and insulating agent mixer 18. The insulating agent is stored in the insulating agent storage tank 17. The insulating agent storage tank 17 is configured to introduce a quantitative amount of the insulating agent into the ground product and insulating agent mixer 18. A mixture formed by the ground product and insulating agent mixer 18 is delivered into the fire polishing furnace 19 for fire polishing.

[0043] In this embodiment, the ground products and the insulating agents are in fully mixed and then transported to the fire polishing furnace 19, and when sticky materials appear on an inner wall of a furnace tube in the fire polishing furnace 19, the introduction of the ground products is stopped, and only the insulating agents are introduced so as to quickly adjust the content of insulating agents in the fire polishing furnace 19.

[0044] At a certain temperature, the fire polishing furnace 19 fire polishes the ground products by gravity and by the rotation of the fire polishing furnace 19, and the ball blank products are processed to be spherical.

[0045] In some embodiments, the cooling and cleaning device comprises a fire polishing product cooler 20, a cleaning tube 21, a drying tube 22, a finished product hopper 23, and a screen 24 which are arranged sequentially. The products fire polished by the fire polishing device are sequentially discharged into the fire polishing product cooler 20 for cooling, the cleaning tube 21 for cleaning, and the drying tube 22 for drying. The dried products are discharged into the finished product hopper 23 and discharged onto the screen 24. The finished products are screened by the screen.

[0046] When the above-mentioned embodiments are implemented, if desired, a mechanical arm may be configured to assist the process, such as the transfer of the ball blanks.

[0047] Specific examples are used to illustrate the principles and methods of implementing the present disclosure. The description of the embodiments mentioned above serves to illustrate the method and fundamental principles of the present disclosure. In addition, those skilled in the art may make various modifications in terms of specific embodiments and scope of application in accordance with the teachings of the present disclosure. In summary, the contents of this description should not be understood as the limitation of the present disclosure.

Claims

Claims

1. A fully automatic glass bead production line for vitrifying radioactive nuclear waste, characterized in that it comprises a batching system, a melting furnace, a pressing die, a fire polishing device, and a cooling and cleaning device which are arranged in sequence, and a control system, the batching system being configured to mix multiple raw materials to form a batch, the melting furnace being configured to melt, homogenize, and refine the batch, the pressing die being configured to press the molten batch into bead blanks, the fire polishing device being configured to fire polish the bead blanks, the cooling and cleaning device being configured to cool and clean the fire polished products, and the control system being configured to control the operations of the batching system,of the melting furnace, the pressing die, the fire polishing device and the cooling and cleaning device.,

2. A fully automatic glass bead production line for vitrification of radioactive nuclear waste according to claim 1, characterized in that the batching system comprises at least one oxide batching tank, one oxide conveyor belt, one batch mixing bin, and one temporary batch storage tank;the oxide batching tank is configured to accommodate raw materials, a plurality of oxide batching tanks are provided, the oxide conveyor belt is arranged horizontally, the oxide batching tanks are sequentially arranged above the oxide conveyor belt, the oxide batching tanks are capable of discharging a quantitative amount of raw materials onto the oxide conveyor belt, one end of the oxide conveyor belt extends toward the batch mixing bin and transports the raw materials to the batch mixing bin for mixing, and the batch temporary storage tank is configured to receive a mixture discharged from the batch mixing bin and temporarily store the mixture.;

3. Fully automatic production line of glass beads for the vitrification of radioactive nuclear waste according to claim 1 or claim 2, characterized in that an electric melting furnace is provided as a melting furnace, a batch conveyor belt is disposed between a discharge port of the batching system and a feed port of the electric melting furnace, and the batch conveyor belt is configured to transport the batch to the electric melting furnace.

4. A fully automatic glass bead production line for vitrification of radioactive nuclear waste according to any one of claims 1 to 3, characterized in that the pressing die is configured to receive materials discharged from a discharge port of the melting furnace and press the materials into bead blanks.

5. A fully automatic glass bead production line for vitrification of radioactive nuclear waste according to any one of claims 1 to 4, characterized in that it further comprises a glass bead blank turntable and a rapid component detection system, wherein the glass bead blank turntable is configured to receive the bead blanks exiting the pressing die and temporarily store the bead blanks, the rapid component detection system is configured for sampling from the glass bead blank turntable for inspection, and in the case where components are detected as qualified, the glass bead blanks in the glass bead blank turntable continue to circulate,otherwise the glass bead blanks in the glass bead blank turntable that do not meet the requirements are treated as unqualified products.,

6. A fully automatic glass bead production line for vitrification of radioactive nuclear waste according to claim 5, characterized in that it further comprises a crusher, wherein a plurality of bead blanks formed by the pressing die are joined into a set, and the bead blanks on the glass bead blank turntable are transported to the crusher for crushing, and the crushed products are delivered to the fire polishing device for fire polishing.

7. Fully automatic production line of glass beads for the vitrification of radioactive nuclear waste according to claim 6, characterized in that it further comprises a channel for transporting crushed products, at least one temporary storage tank of crushed products, a crushed product hopper, and a screw conveyor, wherein the crushed products, crushed by the crusher, are transported to the crushed product temporary storage tank for temporary storage via the crushed product transport channel, the crushed product hopper is arranged at a discharge port of the crushed product temporary storage tank, a feed port of the screw conveyor is arranged below a leak port of the crushed product hopper, and the feed port of the screw conveyor extends toward the fire polishing device.

8. A fully automatic glass bead production line for vitrifying radioactive nuclear waste according to claim 7, characterized in that the fire polishing device comprises an insulating agent storage tank, a ground product and insulating agent mixer, and a fire polishing furnace; the feeding port of the screw conveyor extends toward the ground product and insulating agent mixer, an insulating agent is stored in the insulating agent storage tank, the insulating agent storage tank is configured to introduce a quantitative amount of insulating agent into the ground product and insulating agent mixer, and a mixture formed by the ground product and insulating agent mixer is delivered into the fire polishing furnace for fire polishing.

9. Fully automatic production line of glass beads for the vitrification of radioactive nuclear waste according to claim 7 or claim 8, characterized in that the temporary storage tank for crushed products is configured with a dosing function.

10. A fully automatic glass bead production line for vitrification of radioactive nuclear waste according to any one of claims 1 to 9, characterized in that the cooling and cleaning device comprises a fire polishing product cooler, a cleaning tube, a drying tube, a finished product hopper, and a screen which are arranged sequentially; the products fire polished by the fire polishing device are sequentially discharged into the fire polishing product cooler for cooling, the cleaning tube for cleaning, and the drying tube for drying, and the dried products are discharged into the finished product hopper and discharged onto the screen, and the finished products are screened by the screen.

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