Device and method for replacing filter medium of purification system of nuclear power plant

Abstract

The invention provides a nuclear power plant purification system filtering medium replacing device and method. The replacing device comprises a material conveying bin, a material transferring bin, a material transferring device and a draught fan. A first air inlet and a first discharging port are formed in the material conveying bin, and the material transferring bin is installed on the upper portion of the material conveying bin and communicated with the material conveying bin. A first feeding port and a first air outlet are formed in the material transferring device, a second air inlet and a second air outlet are formed in the fan, and the second air inlet is connected with the first air outlet through a pipeline. Wherein the replacing device has a first state for unloading and a second state for loading. According to the replacing device, by replacing the mounting position of the material transferring device and forming different pipeline connections between the material barrel and the iodine adsorber in a matched mode, the replacing device can meet the discharging operation requirement of the iodine adsorber and can also meet the charging operation requirement of the iodine adsorber, the replacing efficiency of a filtering medium is improved, and the replacing cost is reduced. And the contamination risk of operators is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of nuclear air purification equipment, and particularly relates to a nuclear power plant purification system filter medium replacement device and a replacement method. BACKGROUND

[0002] The iodine adsorber of the purification system is an important equipment for removing radioactive iodine pollutants in process exhaust gas and exhaust air in the nuclear industry, and is widely used in nuclear power plants, nuclear fuel processing plants and other scenes. After long-term service, the filter medium activated carbon in the iodine adsorber has a failure problem, which affects the adsorption and purification efficiency of the activated carbon. Therefore, the activated carbon in the iodine adsorber needs to be replaced regularly to ensure that the activated carbon in the iodine adsorber always maintains effective purification efficiency. At present, the replacement of the filter medium in the existing iodine adsorber mainly adopts manual replacement, but the filter medium replacement space of the small iodine adsorber is complex and the working environment is narrow, which not only causes low work efficiency, but also easily increases the risk of contamination of the workers. SUMMARY

[0003] The present application provides a nuclear power plant purification system filter medium replacement device and a replacement method to solve the technical problem of how to improve the filter medium replacement efficiency in a small space working environment.

[0004] The present application provides a nuclear power plant purification system filter medium replacement device, which is used for connecting an iodine adsorber and a cartridge. The replacement device comprises a material conveying bin, a material transferring bin, a material transferring device and a fan. A first air inlet and a first material outlet are arranged on the material conveying bin. The material transferring bin is installed on the upper part of the material conveying bin and is connected to the material conveying bin. A first material inlet and a first air outlet are arranged on the material transferring device. A second air inlet and a second air outlet are arranged on the fan, and the second air inlet is connected to the first air outlet by a pipeline. The replacement device has a first state for unloading and a second state for loading. In the first state, the material transferring device is detachably installed on the cartridge and is connected to the cartridge. The first material inlet is connected to the unloading port of the iodine adsorber by a pipeline.

[0005] In the second state, the material transferring device is detachably installed on the upper part of the material transferring bin and is connected to the material transferring bin. The first material inlet is connected to the cartridge by a pipeline. The first material inlet is connected to the cartridge by a pipeline. The first air outlet is connected to the second air inlet by a pipeline. The first material outlet is connected to the loading port of the iodine adsorber by a pipeline.

[0006] In an embodiment of the present application, the replacement device further comprises a switch, which is arranged on a material communication passage between the material transferring bin and the material conveying bin.

[0007] In an embodiment of the present application, the replacement device further comprises a filter, which is arranged on the airflow communication path between the first feeding port and the first air outlet, so as to prevent the material from entering the first air outlet.

[0008] In an embodiment of the present application, the first feeding port is arranged below the first air outlet.

[0009] In an embodiment of the present application, the filter adopts a filter cartridge.

[0010] In an embodiment of the present application, the replacement device further comprises a filter cartridge and a pulse dust removal device, the material converter comprises a first chamber and a second chamber, the first chamber is communicated with the first feeding port, and the second chamber is communicated with the first air outlet; the filter cartridge separates the first chamber and the second chamber; and the pulse dust removal device is communicated with the second chamber so as to blow high-pressure airflow to the first chamber.

[0011] In an embodiment of the present application, in the first state, the second air outlet is connected with the feeding port of the iodine adsorber by a pipeline.

[0012] In an embodiment of the present application, the replacement device further comprises a moving device, and the material conveying bin is fixedly arranged on the moving device.

[0013] In an embodiment of the present application, the moving device is further provided with a fixing groove matched with the material cylinder, and the material cylinder is clamped in the fixing groove.

[0014] The second aspect of the present application further provides a method for replacing the filter medium of a nuclear power plant purification system, which uses the replacement device described in any one of the above embodiments, and the steps of the replacement method comprise:

[0015] According to the running state of the iodine adsorber, it is determined whether to perform the unloading operation of the filter medium or the loading operation of the filter medium;

[0016] According to the unloading operation requirement of the filter medium, the iodine adsorber, the material cylinder and the replacement device are connected by pipelines, and the filter medium in the iodine adsorber is extracted into the material cylinder by using the negative pressure formed in the material converter during the working process of the replacement device;

[0017] According to the loading operation requirement of the filter medium, the iodine adsorber, the material cylinder and the replacement device are connected by pipelines, the filter medium in the material cylinder is extracted into the material conveying bin by using the negative pressure formed in the material converter during the working process of the replacement device, and the filter medium falling into the material conveying bin from the material conveying bin is blown into the iodine adsorber by using the positive pressure formed in the material conveying bin during the working process of the replacement device.

[0018] Beneficial effects of the present invention: The present invention proposes a filter medium replacement device and replacement method for a nuclear power plant purification system. The replacement device replaces the installation position of the material transfer device and adapts to different pipe connections between the barrel and the iodine adsorber, so that the replacement device can meet both the unloading and loading requirements of the iodine adsorber, avoiding manual replacement operations, improving the replacement efficiency of the filter medium, and reducing the risk of contamination for operators. In the case of complex filter medium replacement space and a narrow working environment, multiple handling or replacement of different replacement devices is avoided, thereby reducing the labor intensity of operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be derived from these drawings without inventive effort.

[0020] In the attached figure:

[0021] Figure 1 This is a schematic structural diagram of a replacement device in one embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the first state connection of the replacement device in one embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the second state connection of the replacement device in one embodiment of the present invention;

[0024] Figure 4 This is a partial structural cross-sectional view of a replacement device in one embodiment of the present invention.

[0025] The reference numerals are as follows:

[0026] 10. Iodine adsorber; 11. Discharge port; 12. Loading port; 20. Cylinder; 100. Feed bin; 110. First air inlet; 120. First outlet; 200. Transfer bin; 300. Transfer device; 301. First chamber; 302. Second chamber; 310. First feed port; 320. First air outlet; 400. Fan; 410. Second air inlet; 420. Second air outlet; 500. Switch; 600. Filter; 700. Pulse dust removal device; 800. Moving device; 810. Frame; 820. Traveling wheels; 830. Fixed slot. DETAILED DESCRIPTION

[0027] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments. The details in this specification may be modified or altered based on different viewpoints and applications without departing from the spirit of the present invention. The following embodiments and features therein may be combined with one another without conflict.

[0028] It should be noted that the illustrations provided in the following embodiments are merely schematic illustrations of the basic concept of the present invention. The drawings only show components related to the present invention and are not drawn according to the number, shape, and size of components in actual implementation. In actual implementation, the type, quantity, and proportion of each component may be changed arbitrarily, and the component layout may also be more complex.

[0029] In the following description, numerous details are discussed to provide a more thorough explanation of the embodiments of the present invention. However, it will be apparent to those skilled in the art that the embodiments of the present invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring the embodiments of the present invention.

[0030] See Figures 1 to 4 The present invention provides a filter medium replacement device and replacement method. The replacement device is connected to an iodine adsorber 10 and a barrel 20, and the replacement device is used to realize the unloading and loading operations of the radioactive filter medium in the iodine adsorber 10. The replacement device includes a feed bin 100, a transfer bin 200, a transfer device 300 and a blower 400, and has a first state for unloading and a second state for loading. The feed bin 100 is used to blow the material in the feed bin 100 into the iodine adsorber 10 by positive pressure blowing when the replacement device is performing a loading operation. The feed bin 100 adopts a straight pipe structure. A first air inlet 110 is provided at one end of the feed bin 100. The first air inlet 110 can be connected to the blower 400 via a pipeline. The first discharge port 120 serves as a material discharge port in the feed bin 100 and can be connected to the feed port of the iodine adsorber 10 via a pipeline.

[0031] See also Figure 2 and Figure 3, the transfer bin 200 is fixedly installed on the upper portion of the conveying bin 100 and is communicated with the conveying bin 100, and specifically, when the filter medium is sucked into the transfer bin 200, the filter medium falls into the conveying bin 100 under the action of gravity. The transfer device 300 is of a detachable structure, and can be selectively installed on the material cylinder 20 or the transfer bin 200 according to different working conditions of the replacement device. The first feeding port 310 and the first air outlet 320 are arranged on the transfer device 300, the first feeding port 310 is used as a material inlet of the filter medium, and in the unloading operation, the filter medium is sucked into the transfer device 300 from the iodine adsorber 10 through the first feeding port 310. In the loading operation, the filter medium is sucked into the transfer device 300 from the material cylinder 20 through the first feeding port 310. The fan 400 is a power supply device for the replacement device to work, and the fan 400 forms an air flow circulation loop in the replacement device to realize the replacement operation of the filter medium. The second air inlet 410 and the second air outlet 420 are arranged on the fan 400, and the second air inlet 410 is connected with the first air outlet 320 in a pipeline manner.

[0032] The replacement device has a first state for unloading and a second state for loading,

[0033] Please refer to Figure 2 The first state of the replacement device is a pipeline connection state of the replacement device, the iodine adsorber 10 and the material cylinder 20 when the iodine adsorber 10 performs the unloading operation. In the first state, the transfer device 300 is detachably installed on the material cylinder 20 and is communicated with the material cylinder 20, and the detachable installation mode of the transfer device 300 and the material cylinder 20 is not limited, and can be any suitable connection mode that ensures the relative connection stability of the transfer device 300 and the material cylinder 20, for example, can be clamping, bolt connection, threaded connection, flange connection and the like, but is not limited thereto. The first feeding port 310 is connected with the unloading port 11 of the iodine adsorber 10 in a pipeline manner, the unloading port 11 is located on the lower portion of the iodine adsorber 10, the fan 400 works, the replacement device sucks air from the unloading port 11, a negative pressure is formed in the transfer device 300, the filter medium is drawn out of the iodine adsorber 10, and the filter medium falls into the material cylinder 20 after entering the negative pressure chamber in the transfer device 300, so that the unloading operation of the iodine adsorber 10 is completed.

[0034] Please refer to Figure 3The second state of the replacement device is the pipeline state of the replacement device, the iodine adsorber 10 and the cartridge 20 when the iodine adsorber 10 is in the charging operation. In the second state, the material transfer device 300 is detachably mounted on the upper part of the material transfer bin 200 and communicates with the material transfer bin 200. The detachable mounting mode of the material transfer device 300 and the cartridge 20 is not limited, and can be any suitable connection mode that ensures the stable relative connection of the material transfer device 300 and the material transfer bin 200, for example, can be clamping, bolt connection, threaded connection, flange connection, etc., but is not limited thereto. The first inlet 310 is connected with the cartridge 20 by a pipeline to extract the filter medium stored in the cartridge 20 into the material transfer device 300, and the filter medium in the material transfer device 300 falls into the material transfer bin 200 under the action of gravity and then falls into the material conveying bin 100. The first air outlet 320 is connected with the second air inlet 410 by a pipeline, and the first discharge port 120 is connected with the charging port 12 of the iodine adsorber 10 by a pipeline. The filter medium and the airflow are separated in the material transfer device 300 and enter different circulation paths. Under the action of the fan 400, the airflow blows positive pressure airflow into the material conveying bin 100, and the filter medium falling into the material conveying bin 100 is conveyed to the charging port 12 of the iodine adsorber 10 through the first discharge port 120 by a pipeline, and the charging port 12 is located above the iodine adsorber 10, thereby realizing the charging operation of the filter medium.

[0035] The replacement device changes the mounting position of the material transfer device 300 and adapts to different pipeline connections between the cartridge 20 and the iodine adsorber 10, so that the replacement device can meet the requirements of the discharging operation and the charging operation of the iodine adsorber 10, avoids manual replacement operation, improves the replacement efficiency of the filter medium, and reduces the risk of contamination of the operator. In the case of complex filter medium replacement space and small operation environment, the need for multiple handling or replacement of different replacement devices is avoided, and the labor intensity of the operator is reduced.

[0036] Please refer to Figure 4 In an embodiment of the present application, the replacement device further comprises a on-off device 500 arranged on the material communication passage between the material transfer bin 200 and the material conveying bin 100 to control the falling speed and frequency of the material transfer bin 200 to the material conveying bin 100, prevent the filter medium in the material conveying bin 100 from being blown back to the material transfer bin 200 when the fan 400 provides positive pressure material feeding to the material conveying bin 100, and avoid affecting the material replacement efficiency. At the same time, the falling material in the material conveying bin 100 is prevented from accumulating too much, and the air pressure provided by the fan 400 is insufficient to blow the filter medium into the iodine adsorber 10. The type of the on-off device 500 is not limited, and can be any suitable type structure that can control the on-off of the falling material between the material conveying bin 100 and the material transfer bin 200. For example, the on-off device 500 can adopt an electric ball valve, an electric gate valve, an electric stop valve or an electric diaphragm valve, etc.

[0037] Please refer toFigure 4 In an embodiment of the present application, when the replacement device is loading or unloading, the chamber in the material transfer device 300 is a separation chamber for the filter medium and the airflow. After the filter medium and the airflow enter the material transfer device 300 through the first inlet 310, the filter medium falls into the transfer bin 200 or the cartridge 20, and the airflow continues to flow through the fan 400 from the first inlet 310 to the first outlet 320 of the material transfer device 300 and then to the fan 400. To prevent the filter medium from flowing into the first outlet 320 and the fan 400 with the airflow during the flow of the filter medium in the chamber of the material transfer device 300, the replacement device further comprises a filter 600. The filter medium is arranged in the material transfer device 300 and on the airflow communication passage between the first inlet 310 and the first outlet 320 to prevent the material from entering the first outlet 320. The type of the filter 600 is not limited and can be any suitable structure type that can effectively separate the filter medium and the airflow. For example, the filter 600 can be a mesh plate. The mesh of the mesh plate can prevent the particles of the filter medium from entering while not affecting the flow of the airflow. The filter 600 can also use a filter cartridge. The filter cartridge can prevent the filter medium from entering the first outlet 320 while achieving the effect of dust prevention and filtration.

[0038] Referring to Figure 2 In an embodiment of the present application, the first inlet 310 is arranged below the first outlet 320, and the first outlet 320 is arranged above the first inlet 310. When the filter medium and the airflow enter the material transfer device 300 through the first inlet 310, the filter medium falls downward under the action of gravity, and the airflow enters the first outlet 320 upward, thereby reducing the probability of the filter medium being sucked into the first outlet 320 with the airflow.

[0039] In an embodiment of the present application, the filter 600 uses a filter cartridge to purify the dust during the replacement of the filter medium and ensure the cleanliness of the air delivered by the fan 400. The filter cartridge can be obtained through general commercial means, and its structure and working principle are well known in the industry, which will not be described here.

[0040] Referring to Figure 4In an embodiment of the present application, the replacement device further comprises a filter element and a pulse dust removal device 700, which is used to periodically blow dust on the surface of the filter element to ensure the stability of the air volume. Specifically, the material converter 300 comprises a first chamber 301 and a second chamber 302, the first chamber 301 is connected to the first inlet 310, the second chamber 302 is connected to the first air outlet 320, the filter element separates the first chamber 301 and the second chamber 302, and the filter medium falls into the material converter 200 or the barrel 20 from the first chamber 301 after being sucked into the first chamber 301 through the first inlet 310 along with the airflow. After the airflow is filtered by the filter element from the first chamber 301, it enters the fan 400 through the second chamber 302 and the first air outlet 320 to circulate the air path. The pulse dust removal device 700 is installed in the material converter 300 and is connected to the second chamber 302 to blow high-pressure airflow to the first chamber 301. Specifically, the pulse dust removal device 700 comprises an electromagnetic pulse valve, a blowing pipe and a gas storage tank (not shown in the figure), the electromagnetic pulse valve and the gas storage tank are fixedly installed in the material converter 300, and the electromagnetic pulse valve is used to control the blowing of high-pressure airflow. The gas storage tank is an airflow supply device, the high-pressure gas source is stored in the gas storage tank, and the gas outlet of the blowing pipe is located in the second chamber 302 and faces the filter element to blow high-pressure airflow to the filter element. The pulse dust removal device 700 is used to periodically blow the accumulated dust on the surface of the filter element to ensure the stability of the airflow circulation from the first chamber 301 to the second chamber 302, thereby ensuring the replacement efficiency of the filter medium.

[0041] Please refer to Figure 2 In an embodiment of the present application, when the replacement device is in the first state, the second air outlet 420 is connected to the charging port 12 of the iodine adsorber 10, and the discharging operation of the replacement device forms a closed loop circulation, which can not only speed up the discharging speed of the filter medium in the iodine adsorber 10, but also avoid the leakage of smoke and dust, ensure the cleanliness of the working environment during the operation, and ensure the health of the operators and the safety of the environment.

[0042] Please refer to Figure 1 In an embodiment of the present application, the replacement device further comprises a moving device 800, the material conveying bin 100 is fixedly installed on the moving device 800, and the moving device 800 provides portability for the movement of the replacement device. The moving device 800 comprises a frame body 810 and walking wheels 820. The frame body 810 is a mounting platform for other main structures of the replacement device, and the material conveying bin 100 and the material converter 200 are integrally fixedly installed on the frame body 810. The walking wheels 820 are installed at the bottom of the frame body 810 to provide convenience for the transfer of the frame body 810. The number of the moving device 800 is not limited, which can be one group or multiple groups. In this embodiment, the number of the moving device 800 is two groups, one group of which is installed with the fan 800, and the other group of which is integrally installed with the material conveying bin 100, the material conveying bin 200, the material converter 300 and the barrel 20 and other components.

[0043] Referring to Figure 1 In an embodiment of the present application, the mobile device 800 is further provided with a fixing groove 830 adapted to the cartridge 20, and the cartridge 20 is clamped in the fixing groove 830. Specifically, the fixing groove 830 is provided on the frame 810 and is in a groove structure, and the bottom of the cartridge 20 is embedded in the groove structure. During the movement of the mobile device 800, the cartridge 20 is prevented from shaking or sliding on the frame 810.

[0044] It should be noted that the replacement device of the present application can further include a controller, a power supply, a communication line, a pipeline connecting member and other conventional structural components that meet the normal working requirements of the replacement device. The conventional structural components can be designed according to the existing technical solutions, and thus are not described in detail here and are not limited.

[0045] The second aspect of the present application further provides a filter medium replacement method using any of the above replacement devices. The steps of the replacement method include:

[0046] According to the operating state of the iodine adsorber 10, it is determined whether to perform a filter medium unloading operation or a filter medium loading operation.

[0047] Based on the unloading operation requirement of the filter medium, the iodine adsorber 10, the cartridge 20 and the replacement device are connected by pipelines. During the operation of the replacement device, a negative pressure is formed in the material transfer device 300, and the filter medium in the iodine adsorber 10 is extracted into the cartridge 20. Specifically, the material transfer device 300 is fixedly installed on the upper portion of the cartridge 20, the first inlet 310 is connected to the unloading port 11 of the iodine adsorber 10 by a pipeline, the first air outlet 320 is connected to the second air inlet 410 by a pipeline, and the second air outlet 420 is connected to the loading port 12 of the iodine adsorber 10 by a pipeline. During the operation of the replacement device, the fan 400 provides power, a negative pressure is formed in the material transfer device 300, the filter medium in the iodine adsorber 10 is extracted into the material transfer device 300 along with the airflow, and falls into the cartridge 20, and at the same time, the airflow enters the loading port 12 of the iodine adsorber 10 from the material transfer device 300 through the first air outlet 320 and the fan 400, forming a closed loop circulation.

[0048] Based on the filling medium requirement of the filter medium, the iodine adsorber 10, the material cylinder 20 and the replacement device are connected by pipes, the filter medium in the material cylinder 20 is extracted into the material warehouse 200 by the negative pressure formed in the material converter 300 during the operation of the replacement device, and the filter medium falling into the material warehouse 100 from the material warehouse 200 is blown into the iodine adsorber 10 by the positive pressure formed in the material warehouse 100 during the operation of the replacement device. Specifically, the material converter 300 is fixedly installed on the upper part of the material warehouse 200, the first inlet 310 is connected to the material cylinder 20 containing new filter medium by pipes, the first air outlet 320 and the second air inlet 410 are connected by pipes, the second air outlet 420 and the first air inlet 110 are connected by pipes, and the first discharge port 120 and the discharge port 11 of the iodine adsorber 10 are connected by pipes. When the replacement device is working, the negative pressure is formed in the material converter 300, the filter medium in the material cylinder 20 enters the material converter 300 with the airflow, and falls into the material warehouse 200, the airflow blows into the material warehouse 100 through the first air outlet 320, the fan 400 and the first air inlet 110, the filter medium falling into the material warehouse 100 from the material warehouse 200 is blown out of the first discharge port 120 and blown into the iodine adsorber 10 through the pipes. When the material in the material cylinder 20 is extracted, the new material cylinder 20 is replaced in time to continue the filling operation until the filter medium in the iodine adsorber 10 reaches the filling amount.

[0049] The replacement device and the replacement method of the nuclear power plant purification system filter medium provided by the application can meet the discharge operation requirement of the iodine adsorber and the filling operation requirement of the iodine adsorber by changing the installation position of the material converter and adapting to different pipe connections between the material cylinder and the iodine adsorber, thereby replacing the manual replacement operation, improving the replacement efficiency of the filter medium, and reducing the risk of contamination of the operator. In the case that the filter medium replacement space is complex and the operation environment is small, the labor intensity of the operator is reduced by avoiding multiple transportation or replacement of different replacement devices. The technical problem of how to improve the replacement efficiency of the filter medium in a small space operation environment is solved.

[0050] The above embodiments only exemplarily illustrate the principles and effects of the application, and are not used to limit the application. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the application. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed by the application should be covered by the claims of the application.

Claims

1. A filter medium replacement device for a nuclear power plant purification system, characterized in that: Used to connect the iodine adsorber and the cartridge, the replacement device includes: A feeding bin, on which a first air inlet and a first discharge port are provided; A transfer bin is installed on the upper part of the feed bin and is connected to the feed bin; A material transfer device, on which a first material inlet and a first air outlet are provided; A fan, provided with a second air inlet and a second air outlet, wherein the second air inlet is connected to the first air outlet duct; wherein the changing device has a first state for unloading and a second state for loading; In the first state, the material transfer device is detachably mounted on the barrel and is connected to the barrel; the first feed port is connected to the discharge port pipeline of the iodine adsorber; In the second state, the transfer device is detachably installed on the upper part of the transfer bin and is connected to the transfer bin, the first feed port is connected to the barrel pipe, the first feed port is connected to the barrel pipe, the first air outlet is connected to the second air inlet pipe, and the first outlet is connected to the loading port pipe of the iodine adsorber.

2. The replacement device according to claim 1, characterized in that The replacement device further includes a switch, which is arranged on the material communication passage between the transfer bin and the feeding bin.

3. The replacement device according to claim 1, characterized in that The replacement device further includes a filter, which is arranged on the air flow communication passage between the first feed port and the first air outlet to prevent material from entering the first air outlet.

4. The replacement device according to claim 3, characterized in that The first feed inlet is arranged below the first air outlet.

5. The replacement device according to claim 4, characterized in that The filter adopts a filter element.

6. The replacement device according to claim 1, characterized in that The replacement device also includes a filter element and a pulse dust removal device. The material transfer device includes a first chamber and a second chamber. The first chamber is connected to the first feed port, and the second chamber is connected to the first air outlet. The filter element separates the first chamber and the second chamber. The pulse dust removal device is connected to the second chamber to spray high-pressure airflow into the first chamber.

7. The replacement device according to claim 1, characterized in that When the replacement device is in the first state, the second air outlet is connected to the charging port pipeline of the iodine adsorber.

8. The replacement device according to claim 1, characterized in that The replacement device also includes a moving device, and the feeding bin is fixedly installed on the moving device.

9. The replacement device according to claim 8, characterized in that The moving device is also provided with a fixing groove adapted to the barrel, and the barrel is clamped in the fixing groove.

10. A method for replacing filter media in a nuclear power plant purification system, characterized in that: The replacement method uses the replacement device according to any one of claims 1 to 9, and the steps of the replacement method include: Determine whether to perform a filter medium unloading operation or a filter medium loading operation according to the operating status of the iodine adsorber; Based on the unloading operation requirements of the filter medium, the iodine adsorber, the barrel and the replacement device are connected through pipelines. The negative pressure generated in the material transfer device during the operation of the replacement device is used to extract the filter medium in the iodine adsorber into the barrel. Based on the loading operation requirements of the filter medium, the iodine adsorber, the barrel and the replacement device are connected through pipelines. The negative pressure formed in the transfer device during the operation of the replacement device is used to extract the filter medium in the barrel into the transfer bin. The positive pressure formed in the feed bin during the operation of the replacement device is used to blow the filter medium that falls from the transfer bin into the feed bin into the iodine adsorber.

Images