Radioactive off-gas treatment filter, filter and treatment system

Abstract

The application discloses a filter element for radioactive tail gas treatment, comprising a filter layer, wherein the filter layer is formed by winding glass fiber bundles, and the glass fiber bundles comprise a plurality of micron-sized glass fiber filaments, and the micron-sized glass fiber filaments are spirally interwoven. The application further discloses a radioactive tail gas filter comprising the filter element for radioactive tail gas treatment, and a radioactive tail gas treatment system comprising the radioactive tail gas filter. The filter element for radioactive tail gas treatment can be used for filtering radioactive tail gas with high wet content, and has high filtering efficiency.

Description

Technical Field

[0001] The present invention specifically relates to a radioactive exhaust gas treatment filter element, a radioactive exhaust gas filter including the radioactive exhaust gas treatment filter element, and a radioactive exhaust gas treatment system including the radioactive exhaust gas filter. Background Technology

[0002] Nuclear industry production processes generate large amounts of radioactive liquid waste. Based on the principle of waste minimization, to reduce the volume of radioactive liquid waste, it is necessary to treat it through evaporation, concentration, and other processes. During this treatment, a large amount of radioactive tail gas is generated. This tail gas carries a large number of radioactive droplets and aerosols, which are highly corrosive and radioactive, and cannot be directly discharged into the environment; therefore, it requires purification treatment.

[0003] Radioactive waste gases require sealed high-efficiency filters to remove radioactive droplets and aerosols. However, current technologies suffer from low filter efficiency due to the high moisture content of radioactive exhaust gases, leading to frequent filter replacements and high engineering costs.

[0004] In the existing technology, demisters can also be used for gas filtration. Among them, filter demisters are widely used for gas dehumidification and filtration. However, filter demisters mostly use wire mesh or membrane as filter elements, and filter elements made of these two materials are not suitable for the treatment of radioactive waste gas. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to address the above-mentioned deficiencies in the prior art by providing a radioactive exhaust gas treatment filter element, a radioactive exhaust gas filter including the radioactive exhaust gas treatment filter element, and a radioactive exhaust gas treatment system including the radioactive exhaust gas filter element. The radioactive exhaust gas treatment filter element can be used for filtering radioactive exhaust gas with high moisture content and has high filtration efficiency.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A radioactive exhaust gas treatment filter element includes a filter layer formed by winding glass fiber bundles, wherein the glass fiber bundles include multiple micron-sized glass fiber filaments arranged in a spiral interlacing manner.

[0008] Preferably, the diameter of the glass fiber filament is 8-25 μm;

[0009] The thickness of the filter layer is 45-50mm.

[0010] Preferably, the radioactive exhaust gas treatment filter element further includes a support layer for supporting the filter layer;

[0011] The support layer includes an inner support layer and an outer support layer.

[0012] The inner support layer is cylindrical and made of wire mesh, with the glass fiber bundles wrapped around the outer surface of the inner support layer.

[0013] The outer support layer is also made of wire mesh, which wraps around the filter layer and is tied to the filter layer with cable ties.

[0014] The present invention also provides a radioactive exhaust gas filter, comprising a housing and a filter element, wherein the filter element is the aforementioned radioactive exhaust gas treatment filter element.

[0015] The radioactive exhaust gas treatment filter element is disposed inside the housing;

[0016] The housing is provided with an air inlet and an air outlet;

[0017] The radioactive exhaust gas enters through the air inlet, is filtered by the radioactive exhaust gas treatment filter element, and is then discharged through the air outlet to the outside of the radioactive exhaust gas filter.

[0018] Preferably, the radioactive exhaust gas filter is suspended on the building surface.

[0019] The radioactive exhaust gas filter also includes a support assembly and a connecting rod.

[0020] The support assembly is disposed within the housing and includes an upper end cover, a lower end cover, and a support rod, with both ends of the support rod connected to the upper end cover and the lower end cover, respectively.

[0021] The two ends of the radioactive exhaust gas treatment filter element are fixedly connected to the upper end cover and the lower end cover, respectively, and the filter layer of the radioactive exhaust gas treatment filter element is fixed to the upper end cover and the lower end cover at the connection point without adhesive.

[0022] One end of the connecting rod is connected to the building surface layer, and the other end is connected to the upper cover.

[0023] Preferably, one end of the support rod is welded to the upper end cover, and the other end is connected to the lower end cover through a first threaded structure;

[0024] The lower end cover is also provided with a protective cover, and the lower end cover and the protective cover are connected by a sealing assembly.

[0025] Preferably, the radioactive exhaust gas filter further includes a shielding cover and a plug.

[0026] The shielding cover is disposed on the building surface layer, and the shielding cover has perforations. The plug is used to block the perforations.

[0027] The bottom end of the stopper plate is fixedly connected to the connecting rod.

[0028] Preferably, the plug plate is secured within a perforation in the shielding cover plate via an annular insert. The perforation has a stepped longitudinal section, and correspondingly, the insert also has a stepped longitudinal section.

[0029] The insert is fixedly connected to the shielding cover plate by a bolt and nut assembly. The insert has a groove on its inner wall, and the plug plate has a corresponding protrusion on its outer wall.

[0030] The filter also includes a pressure plate, which is disposed on the plug plate and located outside the building surface layer, and the periphery of the pressure plate is sealed to the shielding cover.

[0031] The present invention also provides a radioactive exhaust gas treatment system, including the above-mentioned radioactive exhaust gas filter and a cleaning device.

[0032] The radioactive exhaust gas filter and cleaning device are both located in the heated chamber;

[0033] The cleaning device includes a nozzle and a deionized water delivery pipe. The nozzle is disposed inside the housing of the radioactive exhaust gas filter and located above the radioactive exhaust gas treatment filter element, and is used to clean the radioactive exhaust gas treatment filter element.

[0034] The deionized water delivery pipe is connected to the nozzle and is used to deliver deionized water into the nozzle.

[0035] Preferably, the processing system also includes a pressure monitor and a controller.

[0036] The pressure monitor is electrically connected to the controller and is located at the air inlet of the housing of the radioactive exhaust gas filter. It is used to measure the pressure at the air inlet of the radioactive exhaust gas filter and transmit the measured pressure value to the controller.

[0037] The cleaning device also includes a deionized water pipeline valve, which is installed on the deionized water delivery pipeline;

[0038] The controller is also electrically connected to the deionized water pipeline valve, and is used to compare the received pressure value with the pressure preset value stored in it, and control the opening and closing of the deionized water pipeline valve according to the comparison result.

[0039] The radioactive exhaust gas treatment filter element of the present invention is made of glass fiber bundles wound together, and the glass fiber bundles include multiple micron-sized glass fiber filaments, which enables the filter element to capture and remove liquids and aerosols in the exhaust gas, and has high filtration efficiency, effectively preventing the problem of secondary entrainment of liquids and aerosols in the treated radioactive exhaust gas.

[0040] The radioactive exhaust gas filter of the present invention can effectively achieve dehumidification and filtration of radioactive exhaust gas by adopting the above-mentioned radioactive exhaust gas filter, and has a simple structure and is easy to operate.

[0041] The radioactive exhaust gas treatment system of the present invention, by employing the above-mentioned radioactive exhaust gas filter, can perform dehumidification and filtration operations on radioactive exhaust gas, and can directly clean the radioactive exhaust gas treatment filter element through the cleaning device in the treatment system, thereby effectively extending the service life of the radioactive exhaust gas treatment filter element. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the structure of the radioactive tail gas treatment filter element in Embodiment 1 of the present invention;

[0043] Figure 2 This is a schematic diagram of the structure of the radioactive tail gas filter in Embodiment 2 of the present invention;

[0044] Figure 3 This is a schematic diagram of the radioactive tail gas treatment system in Embodiment 3 of the present invention.

[0045] In the diagram: 1-Radioactive exhaust gas treatment filter element; 2-Air inlet; 3-Air outlet; 4-Drain outlet; 5-Housing shell; 6-Shielding cover; 7-Installation piece; 8-Plug plate; 9-Pressure plate; 10-Unhooking clamping mechanism; 11-Pressure monitor; 12-Deionized water pipeline valve; 13-Radioactive exhaust gas pipeline valve; 14-Flushing ring pipe; 15-Nozzle; 16-Waste liquid collector; 17-Filter layer;

[0046] 18-Inner support layer; 19-Outer support layer; 20-Upper end cap; 21-Lower end cap; 22-Sealing gasket;

[0047] 23-Support rod; 24-Connecting rod. Detailed Implementation

[0048] The technical solutions of the invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without creative effort are within the scope of the invention.

[0049] In the description of this invention, it should be noted that the use of terms such as "above" to indicate orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings and is only for the purpose of facilitating and simplifying the description. It does 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, and therefore should not be construed as a limitation of this invention.

[0050] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0051] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection," "setting," "installation," "fixing," etc., 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.

[0052] The present invention provides a radioactive exhaust gas treatment filter element, including a filter layer, wherein the filter layer is formed by winding glass fiber bundles, the glass fiber bundles including multiple micron-sized glass fiber filaments, the multiple micron-sized glass fiber filaments being spirally interwoven.

[0053] The present invention also provides a radioactive exhaust gas filter, comprising a housing and a filter element, wherein the filter element is the aforementioned radioactive exhaust gas treatment filter element.

[0054] The radioactive exhaust gas treatment filter element is disposed inside the housing;

[0055] The housing is provided with an air inlet and an air outlet;

[0056] The radioactive exhaust gas enters through the air inlet, is filtered by the radioactive exhaust gas treatment filter element, and is then discharged through the air outlet to the outside of the radioactive exhaust gas filter.

[0057] The present invention also provides a radioactive exhaust gas treatment system, including the above-mentioned radioactive exhaust gas filter and a cleaning device.

[0058] The radioactive exhaust gas filter and cleaning device are both located in the heated chamber;

[0059] The cleaning device includes a nozzle and a deionized water delivery pipe. The nozzle is disposed inside the housing of the radioactive exhaust gas filter and located above the radioactive exhaust gas treatment filter element, and is used to clean the radioactive exhaust gas treatment filter element.

[0060] The deionized water delivery pipe is connected to the nozzle and is used to deliver deionized water into the nozzle.

[0061] Example 1:

[0062] This embodiment discloses a radioactive exhaust gas treatment filter element, such as... Figure 1 As shown, the filter includes a filter layer 17, which is formed by winding glass fiber bundles. Each glass fiber bundle comprises multiple micron-sized glass fiber filaments, which are spirally interwoven to form the glass fiber bundle. The radioactive exhaust gas treatment filter element in this embodiment can be used to capture and remove liquids and aerosols from exhaust gases, and it has high filtration efficiency.

[0063] In this embodiment, the diameter of the glass fiber filaments is 8-25μm. The glass fiber bundles made of glass fiber filaments within this diameter range, and the filter layer 17 formed by winding the glass fiber bundles, can capture and remove liquids and aerosols in the exhaust gas.

[0064] Preferably, the diameter of the glass fiber filament is 8-10 μm.

[0065] In this embodiment, the thickness of the filter layer 17 is 45-50 mm. The filter layer 17 with this thickness range can be used to capture and remove liquids and aerosols in the exhaust gas, and the collection efficiency of liquids and aerosols can reach 99%, which can effectively prevent the problem of secondary entrainment of liquids and aerosols in radioactive exhaust gas.

[0066] In this embodiment, the radioactive exhaust gas treatment filter element also includes a support layer, which is used to support the filter layer 17 and prevent the radioactive exhaust gas treatment filter element from collapsing during operation.

[0067] The support layer includes an inner support layer 18 and an outer support layer 19. The inner support layer 18 is cylindrical and made of wire mesh, with glass fiber bundles wrapped around the outer surface of the inner support layer 18.

[0068] The outer support layer 19 is also made of wire mesh, which wraps around the filter layer 17 and is tied to the filter layer 17 with cable ties.

[0069] The radioactive exhaust gas treatment filter element in this embodiment can not only dehumidify and filter radioactive exhaust gas, but also has high filtration efficiency, effectively preventing the problem of secondary entrainment of liquid and aerosol in the treated radioactive exhaust gas.

[0070] Example 2:

[0071] This embodiment discloses a radioactive exhaust gas filter, such as Figure 2 As shown, it includes a housing 5 and a filter element, wherein the filter element is the radioactive exhaust gas treatment filter element 1 of Example 1, and the radioactive exhaust gas treatment filter element 1 is disposed inside the housing 5.

[0072] In this embodiment, the housing 5 is provided with an air inlet 2 and an air outlet 3. Radioactive exhaust gas enters from the air inlet 2, is filtered by the radioactive exhaust gas treatment filter element, and is discharged to the outside of the radioactive exhaust gas filter through the air outlet 3.

[0073] The radioactive exhaust gas filter in this embodiment, by employing the above-mentioned radioactive exhaust gas filter, can effectively achieve dehumidification of radioactive exhaust gas, and has a simple structure and is easy to operate.

[0074] In this embodiment, the radioactive exhaust gas filter is suspended on the building surface.

[0075] In this embodiment, the radioactive exhaust gas filter also includes a support assembly and a connecting rod 24. The support assembly is disposed inside the housing 5 and includes an upper end cover 20, a lower end cover 21, and a support rod 23. The two ends of the support rod 23 are respectively connected to the upper end cover 20 and the lower end cover 21 to enhance the strength of the radioactive exhaust gas filter.

[0076] In addition, the two ends of the radioactive exhaust gas treatment filter element 1 are fixedly connected to the upper end cover 20 and the lower end cover 21, respectively, and the connection between the filter layer 17 of the radioactive exhaust gas treatment filter element 1 and the upper end cover 20 and the lower end cover 21 is fixed with adhesive-free fixation to prevent the filter layer 13 from detaching from the upper end cover 20 and the lower end cover 21.

[0077] One end of the connecting rod 24 is connected to the building surface layer, and the other end is connected to the upper cover 20.

[0078] Specifically, a groove is provided on the upper surface of the upper end cover 20, and a protrusion is provided at one end of the connecting rod 24. The connecting rod 24 extends into the groove on the upper end cover 20 through the protrusion on the end and connects with the upper end cover 20, and the two are fastened by a bolt assembly.

[0079] In this embodiment, one end of the support rod 23 is welded to the upper end cover 20, and the other end is connected to the lower end cover 21 through a first threaded structure.

[0080] Preferably, a protective cover is also provided outside the lower end cover 21, and the lower end cover 21 and the protective cover are connected by a sealing assembly.

[0081] In this embodiment, the protective cover is disposed outside the lower end cover 21 and covers the outside of the first threaded structure, which can prevent the gas in the filter element from leaking through the gap between the first threaded structure and the support rod 23 or the lower end cover 21.

[0082] In this embodiment, the sealing assembly includes a sealing gasket 22 and a second threaded structure, which is used to connect the lower end cap 21 to the protective cap.

[0083] The sealing gasket 22 is disposed between the lower end cover 21 and the protective cover, and the sealing gasket 22 is wrapped around the second threaded structure to prevent gas from leaking from the gap between the second threaded structure and the lower end cover 21 and the protective cover.

[0084] Preferably, the sealing gasket 22 is lip-shaped, which allows the sealing gasket 22 to wrap more tightly around the second threaded structure, providing better sealing at the connection between the second threaded structure and the lower end cap 21 and the protective cap.

[0085] In this embodiment, the radioactive exhaust gas filter also includes a shielding cover plate 6 and a plug plate 8. The shielding cover plate 6 is disposed on the building surface layer and has perforations. The plug plate 8 is used to block the perforations.

[0086] The bottom end of the stopper plate 8 is fixedly connected to the connecting rod 24.

[0087] Specifically, the plug plate 8 is secured within the perforation of the shielding cover plate 6 via an annular insert 7, and the longitudinal section of the perforation is stepped, as is the longitudinal section of the insert 7. The shielding cover plate 6 can be connected to the building surface layer via the insert 7.

[0088] In this embodiment, the shielding cover 6 is connected to the building surface layer through the insert 7, which makes the connection between the shielding cover 6 and the building surface layer more stable. Moreover, the shape of the contact surface between the insert 7 and the building surface layer can be designed according to the shape of the building surface layer, making the application range of the shielding cover 6 wider and its installation not limited by the shape of the building surface layer.

[0089] The shielding cover 6 is used to shield radioactive materials in the radioactive exhaust gas filter, preventing operators from being exposed to radiation. The thickness of the shielding cover 6 is determined based on the radioactivity level of the exhaust gas under actual operating conditions.

[0090] In this embodiment, the insert 7 is fixedly connected to the shielding cover 6 by a bolt and nut assembly, and the inner wall of the insert 7 is provided with a groove, and the outer wall of the plug plate 8 is provided with a corresponding protrusion.

[0091] In this embodiment, the radioactive exhaust gas filter also includes a pressure plate 9, which is disposed on the plug plate 8 and located outside the building surface layer. The periphery of the pressure plate 9 is sealed and connected to the shielding cover plate 6 to press the plug plate 8 into the insert 7.

[0092] In this embodiment, the connecting unit includes a bolt and nut assembly, and the insert 7 is fixedly connected to the shielding cover plate 6 through the bolt and nut assembly.

[0093] In this embodiment, the radioactive exhaust gas filter also includes a release clamping mechanism 10, one end of which is connected to the plug plate 8 and the other end is connected to the connecting rod 24.

[0094] The unhooking and clamping mechanism 10 is used to connect the plug plate 8 and the filter element 1, and can directly separate the plug plate 8 from the connecting rod 24 and the radioactive tail gas treatment filter element 1 through it.

[0095] In this embodiment, the plug plate 8 is provided with an interface connected to the gripper. When the radioactive exhaust gas treatment filter element 1 needs to be repaired or replaced, it can be connected to the interface of the plug plate 8 through the gripper, and the plug plate 8, the unhooking and clamping mechanism 10, the connecting rod 24 and the radioactive exhaust gas treatment filter element 1 can be lifted from the housing 5 into the maintenance container at the same time through the lifting tool, so that the repair and replacement of the radioactive exhaust gas treatment filter element 1 can be realized. After replacing the new radioactive exhaust gas treatment filter element, the plug plate 8, the unhooking and clamping mechanism 10, the connecting rod 24 and the new radioactive exhaust gas treatment filter element are then lifted into the housing 5 of the radioactive exhaust gas filter.

[0096] In this embodiment, the radioactive exhaust gas treatment filter element 1 can be disassembled and replaced. When replacing the radioactive exhaust gas treatment filter element 1, it is only necessary to use a lifting tool to pull the radioactive exhaust gas treatment filter element 1 out of the housing 5 and install a new radioactive exhaust gas treatment filter element in the maintenance container. This does not affect the structure of the housing 5 and other components in the radioactive exhaust gas filter, making it easy to operate and reducing radiation to the operators.

[0097] Preferably, the surface of the stopper plate 8 away from the radioactive exhaust gas treatment filter element 1 is covered with stainless steel for welding the stopper plate 8 to the shielding cover plate 6.

[0098] In this embodiment, the shielding cover 6 is used to shield radiation. The thickness of the shielding cover 6 is calculated based on the radioactivity level of the gas in the hot chamber to ensure that the radioactivity level exposed to personnel is controlled within the standard range.

[0099] In this embodiment, the housing 5 of the radioactive exhaust gas filter is provided with a drain port 4 at the bottom. The radioactive exhaust gas enters the radioactive exhaust gas filter through the air inlet 2, which is located below the radioactive exhaust gas treatment filter element 1. The radioactive exhaust gas treatment filter element 1 is cylindrical in structure. After the droplets and aerosols carried by the radioactive exhaust gas undergo sufficient movement and collision in the radioactive exhaust gas treatment filter element 1, they are discharged from the drain port 4 at the bottom of the housing 5. The purified exhaust gas is discharged through the air outlet 3 of the housing and transported to the subsequent treatment equipment.

[0100] The radioactive exhaust gas filter of this embodiment can effectively dehumidify and filter radioactive exhaust gas, and has a simple structure and is easy to operate.

[0101] Example 3:

[0102] This embodiment discloses a radioactive exhaust gas treatment system, such as Figure 3 As shown, it includes the radioactive exhaust gas filter and cleaning device from Example 2.

[0103] The radioactive exhaust gas filter and cleaning device are both located in the heated chamber.

[0104] The cleaning device includes a nozzle 15 and a deionized water delivery pipe. The nozzle 15 is disposed inside the housing 5 of the radioactive exhaust gas filter and above the radioactive exhaust gas treatment filter element 1, and is used to clean the radioactive exhaust gas treatment filter element 1.

[0105] The deionized water delivery pipe is connected to the nozzle 15 and is used to deliver deionized water into the nozzle 15.

[0106] Preferably, there are multiple nozzles 15, which are evenly arranged above the radioactive exhaust gas treatment filter element 1, and the nozzles of the nozzles 15 are oriented towards the radioactive exhaust gas treatment filter element.

[0107] In this embodiment, the cleaning unit also includes a flushing ring pipe 14, which is disposed above the radioactive exhaust gas treatment filter element 1, and multiple nozzles 15 are evenly disposed on the flushing ring pipe 14.

[0108] In this embodiment, the radioactive exhaust gas treatment system also includes a pressure monitor 11 and a controller.

[0109] The pressure monitor 11 is electrically connected to the controller and is installed on the air inlet 2 of the housing 5 of the radioactive exhaust gas filter. It is used to measure the pressure of the air inlet 2 in the radioactive exhaust gas filter and transmit the measured pressure value to the controller.

[0110] In this embodiment, the cleaning device also includes a deionized water pipeline valve 12, which is installed on the deionized water delivery pipeline and is used to control the opening and closing of the deionized water delivery pipeline.

[0111] In this embodiment, the controller is also electrically connected to the deionized water pipeline valve 12 to compare the received pressure value with the preset pressure value stored in it, and control the opening and closing of the deionized water pipeline valve 12 according to the comparison result.

[0112] Specifically, a pressure monitor 11 is installed on the air inlet 2 of the housing 5 of the radioactive exhaust gas filter. The pressure monitor 11 measures the pressure at the air inlet 2 of the radioactive exhaust gas filter and transmits the pressure value to the controller. The controller receives the pressure value and compares it with the pressure value stored in its database. The preset pressure values ​​include a first preset pressure value and a second preset pressure value. When the pressure value is greater than the first preset pressure value, the controller controls the deionized water pipeline valve 12 to open. Deionized water passes through the flushing ring pipe 14 and is then sprayed out from the nozzle 15 to flush and clean the radioactive exhaust gas treatment filter element and the inner wall of the housing 5 of the radioactive exhaust gas filter. When the measured pressure value is less than the second preset pressure value, the controller controls the deionized water pipeline valve 12 to close, and the radioactive exhaust gas filter is left to stand until it is dry.

[0113] In this embodiment, the first preset pressure value can be set to twice the initial resistance of the air inlet 2 of the radioactive exhaust gas filter. The second preset pressure value can be set to the initial resistance of the air inlet 2 of the radioactive exhaust gas filter.

[0114] In this embodiment, if the measured pressure value does not reach the second preset pressure value, the cleaning device performs a cyclic cleaning operation. If the pressure requirement cannot be met after repeated attempts, it is considered that the radioactive exhaust gas treatment filter element 1 needs to be replaced.

[0115] In this embodiment, the bottom of the housing 5 of the radioactive tail gas filter is provided with a drain port 4. Deionized water and droplets captured during normal operation are transported to the waste liquid collector 16 through the drain port 4 by gravity, waiting for further processing.

[0116] The radioactive exhaust gas treatment system of this embodiment, by employing the aforementioned radioactive exhaust gas filter, can dehumidify the radioactive exhaust gas and directly clean the radioactive exhaust gas treatment filter element through the cleaning device in the treatment system. This can effectively extend the service life of the radioactive exhaust gas treatment filter element, reduce the replacement frequency of the radioactive exhaust gas treatment filter element, reduce the amount of waste generated, and reduce the operating cost of the radioactive exhaust gas treatment system.

[0117] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of the present invention, and the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A radioactive exhaust gas filter, comprising a housing and a radioactive exhaust gas treatment filter element, wherein the radioactive exhaust gas has a high moisture content and carries droplets and aerosols, characterized in that, The radioactive exhaust gas treatment filter element (1) has a cylindrical structure. The radioactive exhaust gas treatment filter element includes a filter layer, which is made of glass fiber bundles wound together. The glass fiber bundles include multiple micron-sized glass fiber filaments, which are spirally interwoven. The glass fiber filaments have a diameter of 8-25 μm, and the filter layer has a thickness of 45-50 mm, for capturing and removing liquids and aerosols from radioactive exhaust gases. The radioactive exhaust gas treatment filter element is disposed inside the housing; The housing is provided with an air inlet (2) and an air outlet (3); the bottom of the housing (5) is provided with a drain outlet (4). Radioactive exhaust gas enters the radioactive exhaust gas filter through the air inlet (2), and the air inlet is located below the radioactive exhaust gas treatment filter element (1). Then, the radioactive exhaust gas is introduced into the radioactive exhaust gas treatment filter element (1). After the droplets and aerosols carried by the radioactive exhaust gas have undergone sufficient movement and collision in the radioactive exhaust gas treatment filter element (1), they are discharged from the drain port (4) at the bottom of the shell (5). The purified exhaust gas is discharged through the air outlet (3) of the shell and transported to the subsequent treatment equipment.

2. The radioactive exhaust gas filter according to claim 1, characterized in that, The radioactive exhaust gas treatment filter element also includes a support layer, which is used to support the filter layer; The support layer includes an inner support layer and an outer support layer. The inner support layer is cylindrical and made of wire mesh, with the glass fiber bundles wrapped around the outer surface of the inner support layer. The outer support layer is also made of wire mesh, which wraps around the filter layer and is tied to the filter layer with cable ties.

3. The radioactive exhaust gas filter according to claim 1, characterized in that, The radioactive exhaust gas filter is suspended on the building's surface. The radioactive exhaust gas filter also includes a support assembly and a connecting rod. The support assembly is disposed within the housing and includes an upper end cover, a lower end cover, and a support rod, with both ends of the support rod connected to the upper end cover and the lower end cover, respectively. The two ends of the radioactive exhaust gas treatment filter element are fixedly connected to the upper end cover and the lower end cover, respectively, and the filter layer of the radioactive exhaust gas treatment filter element is fixed to the upper end cover and the lower end cover at the connection point without adhesive. One end of the connecting rod is connected to the building surface layer, and the other end is connected to the upper cover.

4. The radioactive exhaust gas filter according to claim 3, characterized in that, One end of the support rod is welded to the upper end cover, and the other end is connected to the lower end cover through a first threaded structure; The lower end cover is also provided with a protective cover, and the lower end cover and the protective cover are connected by a sealing assembly.

5. The radioactive exhaust gas filter according to claim 3, characterized in that, It also includes a shielding cover and a plug (8). The shielding cover is disposed on the building surface layer, and the shielding cover has perforations. The plug is used to block the perforations. The bottom end of the stopper plate is fixedly connected to the connecting rod.

6. The radioactive exhaust gas filter according to claim 5, characterized in that, The plug plate is secured within a perforation in the shielding cover plate via an annular insert. The perforation has a stepped longitudinal section, and correspondingly, the insert also has a stepped longitudinal section. The insert is fixedly connected to the shielding cover plate by a bolt and nut assembly. The insert has a groove on its inner wall, and the plug plate has a corresponding protrusion on its outer wall. The filter also includes a pressure plate (9), which is disposed on the plug plate and located outside the building surface layer, and the periphery of the pressure plate is sealed to the shielding cover.

7. A radioactive exhaust gas treatment system, characterized in that, Includes the radioactive exhaust gas filter and cleaning device as described in any one of claims 1-6. The radioactive exhaust gas filter and cleaning device are both located in the heated chamber; The cleaning device includes a nozzle and a deionized water delivery pipe. The nozzle is disposed inside the housing of the radioactive exhaust gas filter and located above the radioactive exhaust gas treatment filter element, and is used to clean the radioactive exhaust gas treatment filter element. The deionized water delivery pipe is connected to the nozzle and is used to deliver deionized water into the nozzle.

8. The radioactive tail gas treatment system according to claim 7, characterized in that, The processing system also includes pressure monitors and controllers. The pressure monitor is electrically connected to the controller and is located at the air inlet of the housing of the radioactive exhaust gas filter. It is used to measure the pressure at the air inlet of the radioactive exhaust gas filter and transmit the measured pressure value to the controller. The cleaning device also includes a deionized water pipeline valve, which is installed on the deionized water delivery pipeline; The controller is also electrically connected to the deionized water pipeline valve, and is used to compare the received pressure value with the pressure preset value stored in it, and control the opening and closing of the deionized water pipeline valve according to the comparison result.

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