Radioactive pyrolysis oven steel bead collection device

Abstract

The present disclosure relates to the technical field of radioactive pollution control equipment, and particularly relates to a radioactive pyrolysis furnace steel ball collecting device, which comprises a vortex air pump, the vortex air pump is provided with a suction port and an exhaust port; an intermediate container is used for collecting steel balls; a suction circuit is used for being connected with the radioactive pyrolysis furnace, the intermediate container and the suction port, the steel balls in the radioactive pyrolysis furnace are sucked and sent to the intermediate container through the negative pressure formed at the suction port, and the flue gas carrying radioactive aerosol in the radioactive pyrolysis furnace is sucked into the vortex air pump; a flue gas circuit is used for being connected with the exhaust port and the radioactive pyrolysis furnace; a controller adjusts the suction air flow of the vortex air pump according to the size of the steel balls to be collected, so as to ensure that the steel balls are transported into the intermediate container, the flue gas in the intermediate container can be completely separated from the steel balls, the steel balls are prevented from being sucked into the vortex air pump, the reliability is improved, the closed-circuit management of the exhaust gas of the maintenance operation is realized, the radioactive flue gas is reduced, and the radioactive pollution is reduced.

Description

Technical Field

[0001] This disclosure relates to the field of radioactive pollution control equipment technology, and in particular to a steel ball collection device for a radioactive pyrolysis furnace. Background Technology

[0002] In the field of radioactive waste treatment from the nuclear fuel cycle, the pyrolysis furnace is a key thermal equipment in the pyrolysis reactor for low-radioactive organic waste. It is filled with a large number of steel balls as a heat carrier to grind the reaction products into ash. After long-term operation, the steel balls may experience changes in particle size and decreased fluidity due to impurities and mechanical wear, leading to uneven fluidization within the furnace, reduced heat transfer efficiency, or localized blockages. To accurately diagnose the cause of the malfunction, some or all of the steel balls must be removed from the furnace for testing and analysis, and the steel balls must be replaced periodically.

[0003] Currently, common methods for removing steel balls have significant drawbacks. They require manual opening of the pyrolysis furnace top cover to retrieve them or the use of industrial vacuum cleaners for direct extraction. These methods involve open operations, and the flue gas containing a large amount of radioactive aerosols inside the furnace can directly diffuse into the air of the equipment room, which can easily cause maintenance personnel and the factory environment to be contaminated with radioactive materials.

[0004] Therefore, it is necessary to propose a steel ball collection device for radioactive pyrolysis furnaces to at least partially solve the problems existing in the prior art. Summary of the Invention

[0005] This disclosure aims to address at least one of the technical problems existing in the prior art or related technologies.

[0006] Therefore, this disclosure proposes a device for collecting steel balls from a radioactive pyrolysis furnace.

[0007] In view of this, a steel ball collecting device for a radioactive pyrolysis furnace is provided according to an embodiment of this disclosure, comprising: Vortex air pump, the aforementioned vortex air pump is equipped with an air intake port and an exhaust port; The middle container is used to collect steel balls; The suction circuit is used to connect the radioactive pyrolysis furnace, the intermediate container and the exhaust port. The negative pressure formed at the exhaust port draws the steel balls in the radioactive pyrolysis furnace into the intermediate container and draws the flue gas carrying radioactive aerosols in the radioactive pyrolysis furnace into the vortex pump. A flue gas circuit is used to connect the exhaust port and the radioactive pyrolysis furnace, and the flue gas in the vortex pump is transported to the radioactive pyrolysis furnace through the flue gas circuit. The controller is used to control the suction airflow rate of the vortex air pump according to the size of the steel ball.

[0008] In one feasible implementation, the above-mentioned suction circuit includes: The first suction tube section is connected to the above-mentioned air extraction port and the above-mentioned intermediate container; The second suction pipe section is used to connect the aforementioned intermediate container and the aforementioned radioactive pyrolysis furnace.

[0009] In one feasible implementation, the inner diameter of the first suction tube segment is larger than the inner diameter of the second suction tube segment.

[0010] In one feasible embodiment, the above-mentioned radioactive pyrolysis furnace steel ball collecting device further includes: A stainless steel pipe section, one end of which is connected to the end of the second suction pipe section inserted into the radioactive pyrolysis furnace, and the other end of which is a slanted suction nozzle.

[0011] In one feasible implementation, the controller determines the wind speed required for the steel ball to suspend by the size of the steel ball, the density of the steel ball, and the density of the flue gas; and determines the minimum value of the suction airflow of the vortex air pump by using a set safety factor and the diameter of the second suction pipe section. The controller determines the upper limit of the upward airflow velocity in the intermediate container by the wind speed required for the suspension of the steel balls, and determines the maximum value of the suction airflow of the vortex air pump based on the upper limit of the upward airflow velocity and the cross-sectional area of ​​the intermediate container.

[0012] In one feasible implementation, the aforementioned safety factor is greater than 1.2.

[0013] In one feasible embodiment, the above-mentioned radioactive pyrolysis furnace steel ball collecting device further includes: Pipe clamps are installed at the connection points of the aforementioned stainless steel pipe section and the aforementioned second suction pipe section, the connection points of the aforementioned first suction pipe section and the aforementioned air extraction port, and the connection points of the aforementioned flue gas pipe section and the aforementioned exhaust port.

[0014] In one feasible implementation, the top of the intermediate container is provided with a conical cover, and the second suction tube section is connected to the conical cover.

[0015] In one feasible embodiment, the above-mentioned radioactive pyrolysis furnace steel ball collecting device further includes: An ash separation chamber is provided in the aforementioned radioactive pyrolysis furnace and is used to separate the gas and ash from the flue gas that is transported to the aforementioned radioactive pyrolysis furnace via the aforementioned flue gas circuit. The outlet pipeline is connected to the aforementioned gas-ash separation chamber. After the gas-ash separation operation is completed in the aforementioned gas-ash separation chamber, the aforementioned flue gas is transported to the exhaust gas treatment system through the aforementioned outlet pipeline.

[0016] Compared to existing technologies, this disclosure offers at least the following advantages: The radioactive pyrolysis furnace steel ball collection device provided in this embodiment includes a vortex pump, an intermediate container, a suction circuit, a flue gas circuit, and a controller. The vortex pump has an intake port and an exhaust port, with negative pressure generated at the intake port. The suction circuit connects the radioactive pyrolysis furnace, the intermediate container, and the intake port, allowing the negative pressure generated by the vortex pump to draw steel balls and flue gas carrying radioactive aerosols from the radioactive pyrolysis furnace into the intermediate container. Simultaneously, the intermediate container collects the steel balls while the flue gas is drawn into the vortex pump from the intake port. The flue gas circuit connects the exhaust port and the radioactive pyrolysis furnace, allowing the flue gas drawn into the vortex pump to be transported back into the radioactive pyrolysis furnace for reintegration into the process gas flow. This facilitates subsequent flue gas purification, achieves closed-loop management of maintenance operation exhaust gas, reduces the escape of radioactive flue gas, minimizes radioactive contamination of maintenance personnel and the plant environment, and improves safety. Furthermore, the controller can adjust the suction airflow of the vortex air pump according to the size of the steel balls to be collected, thereby ensuring that the steel balls are delivered to the intermediate container and that the flue gas in the intermediate container can be completely separated from the steel balls, preventing the steel balls from being sucked into the vortex air pump, improving reliability, and preventing radioactive contamination caused by residual flue gas in the intermediate container. Attached Figure Description

[0017] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of exemplary embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this disclosure. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This is a schematic structural diagram of a steel ball collection device for a radioactive pyrolysis furnace according to an embodiment of the present disclosure; Figure 2 This is an assembly diagram of the second suction tube section and the stainless steel tube section according to an embodiment of the present disclosure; Figure 3 This is an assembly diagram of a flue gas pipe section and sealing structure according to an embodiment of the present disclosure; Figure 4 This is a schematic diagram of the assembly of the first suction tube section and the air extraction port according to an embodiment of the present disclosure.

[0018] in, Figures 1 to 4 The correspondence between the reference numerals and component names in the attached drawings is as follows: 110 Vortex air pump, 111 Air extraction port, 112 Exhaust port, 120 Intermediate container, 121 Conical cover, 130 Suction circuit, 131 First suction pipe section, 132 Second suction pipe section, 140 Flue gas pipe section, 150 Stainless steel pipe section, 160 Sealing structure, 170 Pipe clamp, 200 Radioactive pyrolysis furnace, 210 Inspection port, 220 Gas-ash separation chamber, 230 Outlet pipeline, 240 Steel ball. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that the description of these embodiments is intended to aid in understanding the invention, but does not constitute a limitation thereof. The specific structural and functional details disclosed herein are merely for describing exemplary embodiments of the invention. However, the invention can be embodied in many alternative forms and should not be construed as being limited to the embodiments described herein.

[0020] like Figures 1 to 4 As shown in the present disclosure, an embodiment of a radioactive pyrolysis furnace 200 steel ball 240 collection device is provided, comprising: a vortex air pump 110, the vortex air pump 110 being provided with an exhaust port 111 and an exhaust port 112; an intermediate container 120 for collecting steel balls 240; and a suction circuit 130 for connecting the radioactive pyrolysis furnace 200, the intermediate container 120, and the exhaust port 111, wherein the negative pressure formed at the exhaust port 111 is used to collect the steel balls 240 in the radioactive pyrolysis furnace 200. Steel ball 240 is pumped into the intermediate container 120, and the flue gas carrying radioactive aerosol in the radioactive pyrolysis furnace 200 is drawn into the vortex pump 110; a flue gas circuit is used to connect the exhaust port 112 and the radioactive pyrolysis furnace 200, and the flue gas in the vortex pump 110 is transported to the radioactive pyrolysis furnace 200 through the flue gas circuit; a controller is used to control the suction airflow of the vortex pump 110 according to the size of the steel ball 240.

[0021] It is understood that the steel ball 240 collection device for the radioactive pyrolysis furnace 200 provided in this embodiment includes a vortex pump 110, an intermediate container 120, a suction circuit 130, a flue gas circuit, and a controller. The intermediate container 120 can be mounted on a support plate, and the vortex pump 110 can be equipped with an extraction port 111 and an exhaust port 112. A negative pressure can be generated at the extraction port 111. The radioactive pyrolysis furnace 200, the intermediate container 120, and the extraction port 111 are connected through the suction circuit 130. Thus, the negative pressure generated by the vortex pump 110 draws the steel balls 240 and the flue gas carrying radioactive aerosols from the radioactive pyrolysis furnace 200 into the intermediate container 120. While the intermediate container 120 collects the steel balls 240, the flue gas is simultaneously drawn into the vortex pump 110 from the extraction port 111. The flue gas circuit connects the exhaust port 112 and the radioactive pyrolysis furnace 200 to transport the flue gas drawn into the vortex pump 110 back into the radioactive pyrolysis furnace 200, thus reintegrating it into the process gas flow. This facilitates subsequent flue gas purification, achieving closed-loop management of maintenance operation exhaust gas, reducing the escape of radioactive flue gas, minimizing radioactive contamination of maintenance personnel and the plant environment, and improving safety. Furthermore, the controller can adjust the suction airflow of the vortex pump 110 according to the size of the steel balls 240 to be collected, ensuring that the steel balls 240 are transported to the intermediate container 120, and that the flue gas in the intermediate container 120 is completely separated from the steel balls 240. This prevents the steel balls 240 from being sucked into the vortex pump 110, improving reliability and preventing radioactive contamination caused by residual flue gas in the intermediate container 120.

[0022] It should be noted that the radioactive pyrolysis furnace 200 may be equipped with an inspection port 210, and the gas-ash separation chamber 220 may be equipped with multiple vents. The inspection port 210 is connected to the gas-ash separation chamber 220 through the vents. The diameter of the vents is smaller than the diameter of the steel ball 240, so that the steel ball 240 is held in the inspection port 210. Both the flue gas circuit and the suction circuit 130 are connected to the inspection port 210.

[0023] For example, the vortex air pump 110 can be powered by a 380V power source so that it can be directly powered from the plant. The intermediate container 120 can be modified from a barrel used for storing radioactive waste. The intermediate container 120 can have sufficient settling space to achieve efficient gas-solid separation.

[0024] In some examples, such as Figure 1 As shown, the suction circuit 130 includes: a first suction pipe section 131, which is connected to the air extraction port 111 and the intermediate container 120; and a second suction pipe section 132, which is connected to the intermediate container 120 and the radioactive pyrolysis furnace 200.

[0025] Understandably, the first suction pipe section 131 is connected to the exhaust port 111 and the intermediate container 120, and the second suction pipe section 132 is connected to the intermediate container 120 and the radioactive pyrolysis furnace 200. Thus, the steel balls 240 and flue gas in the radioactive pyrolysis furnace 200 are drawn into the intermediate container 120 through the second suction pipe section 132, and the flue gas in the intermediate container 120 is drawn into the vortex air pump 110 to separate the flue gas and the steel balls 240.

[0026] For example, both the first suction tube section 131 and the second suction tube section 132 can be made of steel wire lined pressure-resistant hose to improve reliability.

[0027] In some examples, such as Figure 1 As shown, the inner diameter of the first suction tube section 131 is larger than the inner diameter of the second suction tube section 132.

[0028] Understandably, setting the diameter of the first suction pipe section 131 to be larger than that of the second suction pipe section 132 serves two purposes. First, it allows for a smaller inner diameter of the second suction pipe section 132, ensuring a higher airflow velocity generated by the vortex pump 110 within it. This ensures the steel balls 240 are transported to the intermediate pipe section and improves transport efficiency. Second, it allows for a larger inner diameter of the first suction pipe section 131, reducing the airflow velocity generated by the vortex pump 110 within it. This, in turn, reduces the upward airflow velocity within the intermediate container 120, ensuring the steel balls 240 can be completely physically collected through settling. Simultaneously, it allows for rapid extraction of flue gas into the vortex pump 110, improving reliability.

[0029] For example, the inner diameter of the first suction tube section 131 can be 50 mm, and the inner diameter of the second suction tube section 132 can be 40 mm.

[0030] In some examples, such as Figure 2 As shown, the above-mentioned collection device for steel balls 240 in the radioactive pyrolysis furnace 200 further includes: a stainless steel pipe section 150, one end of which is connected to the end of the second suction pipe section 132 inserted into the radioactive pyrolysis furnace 200, and the other end of which is a slanted suction nozzle.

[0031] Understandably, the stainless steel tube segment 150 can be inserted into the inspection port 210 of the radioactive pyrolysis furnace 200, and the steel ball 240 can be extracted through the oblique suction nozzle of the stainless steel tube segment 150 to physically break up the agglomeration of the steel ball 240, thereby effectively and stably increasing the steel ball 240 extraction speed.

[0032] In some examples, the controller determines the required wind speed for suspending the steel ball 240 by using the size of the steel ball 240, the density of the steel ball 240, and the density of the flue gas; it determines the minimum value of the suction airflow of the vortex air pump 110 by using a set safety factor and the diameter of the second suction pipe section 132; the controller determines the upper limit of the wind speed of the rising airflow in the intermediate container 120 by using the required wind speed for suspending the steel ball 240, and determines the maximum value of the suction airflow of the vortex air pump 110 by using the upper limit of the rising airflow and the cross-sectional area of ​​the intermediate container 120.

[0033] Understandably, the formula for the airflow velocity required to levitate the 240 steel balls is as follows:

[0034] Where g is the acceleration due to gravity, which can be selected as 9.8 m / s². 2 , For steel balls with a density of 240, a density of 7800 kg / m³ can be selected. 3 P g For the flue gas density, 1.2 kg / m³ can be selected. The drag coefficient can be a constant value of 0.44. Let be the diameter of steel ball 240. Substituting this diameter into the formula, we can calculate the airflow velocity required for the steel ball 240 to levitate. .

[0035] The formula for the gas flow rate in the second suction tube section 132 is as follows:

[0036] Where Q is the suction airflow rate of the vortex air pump 110, and d is the inner diameter of the second suction pipe section 132.

[0037] Safety transport coefficient is and The ratio of the two values, when the safety transport coefficient is greater than 1.2, can ensure that the steel balls 240 are pumped from the radioactive pyrolysis furnace 200 to the intermediate container 120, thereby determining the minimum value of the suction airflow of the vortex air pump 110.

[0038] The formula for calculating the wind speed of the rising airflow inside the intermediate container 120 is as follows:

[0039] in, Let Q be the cross-sectional area of ​​the intermediate container 120, and Q be the suction airflow rate of the vortex air pump 110. The terminal velocity of the steel ball 240 when it falls freely in still air is the airflow velocity required for the steel ball 240 to suspend. Through comparative analysis and This allows us to determine whether the steel ball 240 can settle to the bottom of the intermediate container 120 by gravity. This, in turn, determines the maximum value of the suction airflow rate of the vortex air pump 110, and thus the range of values ​​for the suction airflow rate of the vortex air pump 110.

[0040] Understandably, after determining the diameter of the steel ball 240, and the controller adjusting the flow rate of the vortex air pump 110 based on the diameter of the steel ball 240, the flow rate of the vortex air pump 110 can be verified using the aforementioned formulas for the airflow velocity required for the steel ball 240 to suspend, the gas velocity formula for the second suction pipe section 132, and the wind speed calculation formula for the rising airflow in the intermediate container 120. For example, the diameter of the steel ball 240... When 22.22mm is selected, the controller can adjust the suction gas flow rate of the vortex air pump 110 to 0.18m³. 3 / s. Substituting this into the formula for the airflow velocity required to suspend the 240 steel ball, we can obtain... =98.3 m / s. The inner diameter of the second suction tube section 132 is selected as 40 mm. Substituting this into the gas velocity formula for the second suction tube section 132, we can obtain... =143.3 m / s. Therefore, the actual safety conveying factor can be calculated as 143.3 / 98.3 = 1.46, which is greater than the 1.2 safety factor requirement for suspended conveying in pneumatic conveying engineering. Meanwhile, the cross-sectional area of ​​the intermediate container 120... 0.277m can be selected. 3 Substituting the formula for calculating the wind speed of the rising airflow inside the intermediate container 120, we can obtain... =0.65m / s. Comparing the airflow velocity required for the suspension of steel ball 240 with the wind speed of the rising airflow in the intermediate container 120, the ratio is 98.3 / 0.65=151 times. Therefore, even considering the case of uneven airflow distribution, the steel ball 240 will immediately settle and accumulate at the bottom of the intermediate container 120 after entering the intermediate container 120, and will not be sucked into the vortex pump 110. Therefore, the flow rate of the suction airflow of the vortex pump 110 is qualified.

[0041] For example, when the steel balls 240 meet the operating conditions of the radioactive pyrolysis furnace 200, their diameter can be selected from 1 mm to 40 mm. Based on the dimensions of the intermediate container 120 used in the factory, the cross-sectional area of ​​the intermediate container 120 can be selected as 0.115 m². 2 up to 0.388m 2 The inner diameter of the second suction tube section 132 can be selected from 10mm to 50mm. Specifically, the diameter of the steel ball 240 is 1mm, and the cross-sectional area of ​​the intermediate container 120 is 0.115m³. 2With the inner diameter of the second suction pipe section 132 being 10mm, the controller can adjust the suction airflow of the vortex air pump 110 to 0.002m³. 3 / s. Verification confirms that the suction airflow rate of the vortex air pump 110 is qualified. The steel ball 240 has a diameter of 40mm, and the cross-sectional area of ​​the intermediate container 120 is 0.388m³. 2 With the inner diameter of the second suction pipe section 132 being 50mm, the controller can adjust the suction airflow of the vortex air pump 110 to 0.34m³. 3 / s. After verification, it can be confirmed that the flow rate of the suction airflow of the vortex air pump 110 is qualified.

[0042] In some examples, such as Figure 2 and Figure 3 As shown, the above-mentioned collection device for steel balls 240 in the radioactive pyrolysis furnace 200 further includes: a sealing structure 160, which is disposed at the connection between the second suction pipe section 132 and the radioactive pyrolysis furnace 200; and / or disposed at the connection between the flue gas pipe section 140 of the flue gas circuit and the radioactive pyrolysis furnace 200.

[0043] It is understandable that sealing structures 160 can be installed at the connection between the second suction pipe section 132 and the radioactive pyrolysis furnace 200, as well as at the connection between the flue gas pipe section 140 of the flue gas circuit and the radioactive pyrolysis furnace 200. The sealing structures 160 prevent leakage during flue gas transport, thus avoiding radioactive contamination and improving reliability and safety.

[0044] For example, the sealing structure 160 may be a plastic film with strong sealing properties, which is tightly wrapped around the connection between the second suction pipe section 132 and the radioactive pyrolysis furnace 200, as well as the connection between the flue gas pipe section 140 of the flue gas circuit and the radioactive pyrolysis furnace 200.

[0045] In some examples, such as Figure 2 and Figure 4 As shown, the above-mentioned radioactive pyrolysis furnace 200 steel ball 240 collecting device further includes: a pipe clamp 170, which is disposed at the connection between the above-mentioned stainless steel pipe section 150 and the above-mentioned second suction pipe section 132, the connection between the above-mentioned first suction pipe section 131 and the above-mentioned air extraction port 111, and the connection between the above-mentioned flue gas pipe section 140 and the above-mentioned exhaust port 112.

[0046] It is understood that the stainless steel pipe section 150 and the second suction pipe section 132 can be connected and fastened by the pipe clamp 170; the first suction pipe section 131 and the air extraction port 111 can be connected and fastened; and the flue gas pipe section 140 and the exhaust port 112 can be connected and fastened.

[0047] In some examples, such as Figure 1As shown, the top of the intermediate container 120 is provided with a conical cover 121, and the second suction tube section 132 is connected to the conical cover 121.

[0048] It is understood that a conical cover 121 can be provided on the top of the intermediate container 120, and the conical cover 121 is connected to the internal space of the intermediate container 120. One end of the second suction pipe section 132 can be connected to the top of the conical cover 121. This arrangement can ensure that the flue gas in the intermediate container 120 can flow smoothly, can buffer the kinetic energy of the steel ball 240, and can increase the height of the intermediate container 120 so that the intermediate container 120 has sufficient settling space and improves the gas-solid separation efficiency.

[0049] In some examples, the aforementioned collection device for steel balls 240 in the radioactive pyrolysis furnace 200 further includes: a gas-ash separation chamber 220, disposed in the radioactive pyrolysis furnace 200, for separating the gas from ash in the flue gas transported to the radioactive pyrolysis furnace 200 via the aforementioned flue gas circuit; and an outlet pipeline 230, connected to the gas-ash separation chamber 220, through which the flue gas after gas-ash separation is completed is transported to the exhaust gas treatment system.

[0050] Understandably, the gas-ash separation chamber 220 can be installed in the radioactive pyrolysis furnace 200, located below the inspection port 210. The gas-ash separation chamber 220 can have multiple vents, and the inspection port 210 is connected to the gas-ash separation chamber 220 through these vents. The diameter of the vents is smaller than the diameter of the steel balls 240, so that the steel balls 240 are held within the inspection port 210. Flue gas transported to the inspection port 210 via the flue gas loop can flow into the gas-ash separation chamber 220, where gas-ash separation is performed. After gas-ash separation, the flue gas can be transported to the exhaust gas treatment system via the outlet pipeline 230 for purification, achieving closed-loop circulation of maintenance exhaust gas and preventing the escape of radioactive nuclides.

[0051] It should be noted that before performing maintenance on steel ball 240, the airtightness of the suction circuit 130, flue gas circuit, and related connecting structures should be checked first. Confirm that the power connection of the vortex pump 110 is reliable and the grounding is normal, and that the intermediate container 120 is in an unloaded state. Confirm that the negative pressure of the equipment room ventilation system is normal, and adjust the negative pressure of the exhaust fan of the radioactive pyrolysis furnace 200 to ensure the negative pressure state of the pyrolysis process system. After all checks are completed, slowly open the maintenance port 210 of the radioactive pyrolysis furnace 200, quickly insert the stainless steel pipe section 150, and seal it using the sealing structure 160. Connect the pipelines in sequence and recheck the airtightness. Finally, power on and start the vortex pump. During operation, the operating status can be judged by the sound of the vortex pump and the impact sound inside the intermediate container 120. If steel ball 240 is stuck in the suction circuit 130, it must be cleared promptly.

[0052] It should be understood that the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance. Although the terms "first," "second," etc., may be used herein to describe various units, these units should not be limited by these terms. These terms are only used to distinguish one unit from another. For example, a first unit may be referred to as a second unit, and similarly, a second unit may be referred to as a first unit, without departing from the scope of the exemplary embodiments of the invention.

[0053] It should be understood that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist simultaneously. The term " / and" in this article describes another relationship between related objects, indicating that two relationships can exist. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the related objects before and after it are in an "or" relationship.

[0054] It should be understood that in the description of this invention, the terms "upper," "vertical," "inner," "outer," etc., indicate the orientation or positional relationship as commonly placed when the disclosed product is used, or the orientation or positional relationship commonly understood by those skilled in the art. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0055] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0056] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments of the invention. As used herein, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” “containing,” and / or “including” as used herein specify the presence of the stated features, integers, steps, operations, units, and / or components, and do not exclude the presence or addition of one or more other features, quantities, steps, operations, units, components, and / or combinations thereof.

[0057] Specific details are provided in the following description to provide a complete understanding of the exemplary embodiments. However, those skilled in the art will understand that the exemplary embodiments can be implemented without these specific details. In other embodiments, well-known processes, structures, and techniques may be omitted in the depiction of non-essential details to avoid obscuring the exemplary embodiments.

[0058] The above are merely specific embodiments of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

[0059] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art.

Claims

1. A device for collecting steel balls from a radioactive pyrolysis furnace, characterized in that, include: A vortex air pump, wherein the vortex air pump is provided with an air intake port and an air exhaust port; The middle container is used to collect steel balls; The suction circuit is used to connect the radioactive pyrolysis furnace, the intermediate container and the exhaust port. The negative pressure formed at the exhaust port draws the steel balls in the radioactive pyrolysis furnace into the intermediate container and draws the flue gas carrying radioactive aerosols in the radioactive pyrolysis furnace into the vortex pump. A flue gas circuit is used to connect the exhaust port and the radioactive pyrolysis furnace, and the flue gas in the vortex pump is transported to the radioactive pyrolysis furnace through the flue gas circuit; A controller is used to control the suction airflow rate of the vortex air pump according to the size of the steel ball.

2. The steel ball collecting device for a radioactive pyrolysis furnace according to claim 1, characterized in that, The suction circuit includes: The first suction tube section is connected to the air extraction port and the intermediate container; The second suction pipe section is used to connect the intermediate container and the radioactive pyrolysis furnace.

3. The radioactive pyrolysis furnace steel ball collecting device according to claim 2, characterized in that, The inner diameter of the first suction tube section is larger than the inner diameter of the second suction tube section.

4. The radioactive pyrolysis furnace steel ball collecting device according to claim 2, characterized in that, Also includes: A stainless steel pipe section, one end of which is connected to the end of the second suction pipe section inserted into the radioactive pyrolysis furnace, and the other end of which is a slanted suction nozzle.

5. The steel ball collecting device for a radioactive pyrolysis furnace according to claim 2, characterized in that, The controller determines the required wind speed for suspending the steel balls by using the size and density of the steel balls and the density of the flue gas; and determines the minimum value of the suction airflow of the vortex air pump by using a set safety factor and the diameter of the second suction pipe section. The controller determines the upper limit of the upward airflow velocity in the intermediate container by the required wind speed for suspending the steel balls, and determines the maximum value of the suction airflow flow rate of the vortex air pump based on the upper limit of the upward airflow velocity and the cross-sectional area of ​​the intermediate container.

6. The steel ball collecting device for a radioactive pyrolysis furnace according to claim 5, characterized in that, The safety factor is greater than 1.

2.

7. The steel ball collecting device for a radioactive pyrolysis furnace according to claim 4, characterized in that, Also includes: A sealing structure is provided at the connection between the second suction pipe section and the radioactive pyrolysis furnace; And / or located at the connection between the flue gas pipe section of the flue gas circuit and the radioactive pyrolysis furnace.

8. The steel ball collecting device for a radioactive pyrolysis furnace according to claim 7, characterized in that, Also includes: Pipe clamps are installed at the connection points of the stainless steel pipe section and the second suction pipe section, the connection points of the first suction pipe section and the air extraction port, and the connection points of the flue gas pipe section and the exhaust port.

9. The steel ball collecting device for a radioactive pyrolysis furnace according to claim 2, characterized in that, The top of the intermediate container is provided with a conical cover, and the second suction tube section is connected to the conical cover.

10. The steel ball collecting device for a radioactive pyrolysis furnace according to claim 1, characterized in that, Also includes: An ash separation chamber is provided in the radioactive pyrolysis furnace and is used to separate the flue gas from the ash in the flue gas that is transported to the radioactive pyrolysis furnace via the flue gas circuit. An outlet pipeline is connected to the gas-ash separation chamber, and the flue gas after the gas-ash separation operation is completed in the gas-ash separation chamber is transported to the exhaust gas treatment system through the outlet pipeline.

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