CN113198272A - Radioactive tail gas treatment filter element, filter and treatment system - Google Patents
Radioactive tail gas treatment filter element, filter and treatment system Download PDFInfo
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- CN113198272A CN113198272A CN202110587023.7A CN202110587023A CN113198272A CN 113198272 A CN113198272 A CN 113198272A CN 202110587023 A CN202110587023 A CN 202110587023A CN 113198272 A CN113198272 A CN 113198272A
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- radioactive
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- filter
- filter element
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
- B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
- B01D46/2411—Filter cartridges
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
- G21F9/02—Treating gases
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- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention discloses a radioactive tail gas treatment filter element which comprises a filter layer, wherein the filter layer is formed by winding a glass fiber bundle, the glass fiber bundle comprises a plurality of micron-sized glass fiber yarns, and the micron-sized glass fiber yarns are spirally interwoven. The invention also discloses a radioactive tail gas filter comprising the radioactive tail gas treatment filter element, and a radioactive tail gas treatment system comprising the radioactive tail gas filter. The radioactive tail gas treatment filter element can be used for filtering radioactive tail gas with high moisture content, and has high filtering efficiency.
Description
Technical Field
The invention particularly relates to a radioactive tail gas treatment filter element, a radioactive tail gas filter comprising the radioactive tail gas treatment filter element, and a radioactive tail gas treatment system comprising the radioactive tail gas filter.
Background
In the process of nuclear industry production, a large amount of radioactive waste liquid can be generated, according to the waste minimization principle, in order to reduce the volume of the radioactive waste liquid, the radioactive waste liquid needs to be subjected to evaporation, concentration and other treatments, and in the waste liquid treatment process, a large amount of radioactive tail gas can be generated. The tail gas carries a large amount of radioactive liquid drops and aerosol, has strong corrosivity and radioactivity, cannot be directly discharged to the environment, and needs to be purified.
The radioactive waste gas needs to be filtered by a sealed high-efficiency filter for removing radioactive liquid drops and aerosol in the radioactive waste gas. In the prior art, the problems of frequent filter replacement and high engineering cost of the filter are caused by low filtering efficiency of the filter due to high moisture content of the radioactive tail gas.
Among the prior art, can also adopt the defroster to carry out gaseous filtration treatment, wherein, the filtration formula defroster is extensively used for gaseous dehumidification to filter, but the filtration formula defroster adopts silk screen or membrane as the filter core to filter more, and the filter core that adopts these two kinds of materials all can not be applicable to the processing of radioactive waste gas.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a radioactive tail gas treatment filter element, a radioactive tail gas filter comprising the same, and a radioactive tail gas treatment system comprising the radioactive tail gas filter, aiming at the above-mentioned defects existing in the prior art, wherein the radioactive tail gas treatment filter element can be used for filtering radioactive tail gas with high moisture content, and has high filtering efficiency.
In order to solve the technical problems, the invention adopts the following technical scheme:
the radioactive tail gas treatment filter element comprises a filter layer, wherein the filter layer is formed by winding a glass fiber bundle, the glass fiber bundle comprises a plurality of micron-sized glass fiber yarns, and the micron-sized glass fiber yarns are spirally interwoven.
Preferably, the diameter of the glass fiber yarn is 8-25 μm;
the thickness of the filter layer is 45-50 mm.
Preferably, the radioactive tail gas treatment filter element further comprises a support layer, and the support layer is used for supporting the filter layer;
the support layers include an inner support layer and an outer support layer,
the inner supporting layer is cylindrical, the cylindrical inner supporting layer is made of a steel wire mesh, and the glass fiber bundles are wound on the outer surface of the inner supporting layer;
the outer supporting layer is also made of a steel wire mesh, wrapped outside the filtering layer and bound on the filtering layer through a binding belt.
The invention also provides a radioactive tail gas filter, which comprises a shell and a filter element, wherein the filter element adopts the radioactive tail gas treatment filter element,
the radioactive tail gas treatment filter element is arranged in the shell;
the shell is provided with an air inlet and an air outlet;
and the radioactive tail gas enters from the gas inlet, is filtered by the radioactive tail gas treatment filter element and then is discharged out of the radioactive tail gas filter through the gas outlet.
Preferably, the radioactive tail gas filter is hung on a building surface layer,
the radioactive exhaust filter also comprises a support component and a connecting rod,
the supporting component is arranged in the shell and comprises an upper end cover, a lower end cover and a supporting rod, and two ends of the supporting rod are respectively connected with the upper end cover and the lower end cover;
two end parts of the radioactive tail gas treatment filter element are respectively fixedly connected with the upper end cover and the lower end cover, and the joint of the filter layer of the radioactive tail gas treatment filter element and the upper end cover and the lower end cover is fixed by adopting a non-adhesive agent;
one end of the connecting rod is connected with the building surface layer, and the other end of the connecting rod is connected with the upper end cover.
Preferably, one end of the support rod is welded with the upper end cover, and the other end of the support rod is connected with 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 is connected with the protective cover through a sealing component.
Preferably, the radioactive exhaust filter further comprises a shielding cover plate and a plug plate,
the shielding cover plate is arranged on the building surface layer, a perforation is arranged on the shielding cover plate, the plug plate is used for plugging the perforation,
the bottom end of the plug plate is fixedly connected with the connecting rod.
Preferably, the plug plate is clamped in the through hole of the shielding cover plate through an annular insert, the through hole is of a step type in longitudinal section, correspondingly, the longitudinal section of the insert is also of a step type,
the insert is fixedly connected with the shielding cover plate through a bolt and nut assembly, the hole wall of an inner hole of the insert is provided with a groove, the outer wall of the plug plate is correspondingly provided with a bulge,
the filter also comprises a pressing plate, the pressing plate is arranged on the plug plate and positioned outside the building surface layer, and the periphery of the pressing plate is connected with the shielding cover plate in a sealing mode.
The invention also provides a radioactive tail gas treatment system, which comprises the radioactive tail gas filter and a cleaning device,
the radioactive tail gas filter and the cleaning device are both arranged in the hot chamber;
the cleaning device comprises a spray head and a deionized water conveying pipeline, wherein the spray head is arranged in the shell of the radioactive tail gas filter, is positioned above the radioactive tail gas treatment filter element and is used for cleaning the radioactive tail gas treatment filter element;
the deionized water conveying pipeline is communicated with the spray head and used for conveying deionized water into the spray head.
Preferably, the treatment system further comprises a pressure monitor and a controller,
the pressure monitor is electrically connected with the controller, is arranged at an air inlet of a shell of the radioactive exhaust filter, and is used for measuring the pressure of the air inlet in the radioactive exhaust filter and transmitting the measured pressure value to the controller;
the cleaning device also comprises a deionized water pipeline valve, and the deionized water pipeline valve is arranged on the deionized water conveying pipeline;
the controller is also electrically connected with the deionized water pipeline valve and is used for comparing the received pressure value with a pressure preset value stored in the controller and controlling the opening and closing of the deionized water pipeline valve according to a comparison result.
The radioactive tail gas treatment filter element is formed by winding the glass fiber bundle, and the glass fiber bundle comprises a plurality of micron-sized glass fiber yarns, so that the filter element can capture and remove liquid and aerosol in tail gas, has high filtering efficiency, and can effectively prevent the problem that the liquid and the aerosol are secondarily entrained in the treated radioactive tail gas.
The radioactive tail gas filter can effectively realize the dehumidification and filtration operation of the radioactive tail gas by adopting the radioactive tail gas filter, and has simple structure and convenient operation.
According to the radioactive tail gas treatment system, the radioactive tail gas filter is adopted, so that the dehumidifying and filtering operation can be performed on the radioactive tail gas, and the cleaning operation can be directly performed on the radioactive tail gas treatment filter element through the cleaning device in the treatment system, so that the service life of the radioactive tail gas treatment filter element can be effectively prolonged.
Drawings
Fig. 1 is a schematic structural diagram of a radioactive tail gas treatment filter element in embodiment 1 of the present invention;
FIG. 2 is a schematic structural view of a radioactive exhaust gas filter in embodiment 2 of the present invention;
fig. 3 is a schematic structural diagram of a radioactive tail gas treatment system in embodiment 3 of the present invention.
In the figure: 1-radioactive tail gas treatment filter element; 2-an air inlet; 3-air outlet; 4-a liquid discharge port; 5-a shell; 6-shielding cover plate; 7-an insert; 8-a plug plate; 9-pressing a plate; 10-unhooking hold-down mechanism; 11-a pressure monitor; 12-deionized water pipeline valve; 13-radioactive exhaust line valve; 14-a flushing loop; 15-a spray head; 16-a waste liquid collector; 17-a filter layer;
18-an inner support layer; 19-an outer support layer; 20-upper end cover; 21-lower end cap; 22-a gasket;
23-a support bar; 24-connecting rod.
Detailed Description
The technical solutions in the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the scope of the present invention.
In the description of the present invention, it should be noted that the indication of orientation or positional relationship, such as "on" or the like, is based on the orientation or positional relationship shown in the drawings, and is only for convenience and simplicity of description, and does not indicate or imply that the device or element referred to must be provided with a specific orientation, constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected," "disposed," "mounted," "fixed," and the like are to be construed broadly, e.g., as being fixedly or removably connected, or integrally connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases for those skilled in the art.
The invention provides a radioactive tail gas treatment filter element which comprises a filter layer, wherein the filter layer is formed by winding a glass fiber bundle, the glass fiber bundle comprises a plurality of micron-sized glass fiber yarns, and the micron-sized glass fiber yarns are spirally interwoven.
The invention also provides a radioactive tail gas filter, which comprises a shell and a filter element, wherein the filter element adopts the radioactive tail gas treatment filter element,
the radioactive tail gas treatment filter element is arranged in the shell;
the shell is provided with an air inlet and an air outlet;
and the radioactive tail gas enters from the gas inlet, is filtered by the radioactive tail gas treatment filter element and then is discharged out of the radioactive tail gas filter through the gas outlet.
The invention also provides a radioactive tail gas treatment system, which comprises the radioactive tail gas filter and a cleaning device,
the radioactive tail gas filter and the cleaning device are both arranged in the hot chamber;
the cleaning device comprises a spray head and a deionized water conveying pipeline, wherein the spray head is arranged in the shell of the radioactive tail gas filter, is positioned above the radioactive tail gas treatment filter element and is used for cleaning the radioactive tail gas treatment filter element;
the deionized water conveying pipeline is communicated with the spray head and used for conveying deionized water into the spray head.
Example 1:
the embodiment discloses a radioactive tail gas treatment filter element, as shown in fig. 1, which comprises a filter layer 17, wherein the filter layer 17 is formed by winding glass fiber bundles, the glass fiber bundles comprise a plurality of micron-sized glass fiber yarns, and the micron-sized glass fiber yarns are spirally interwoven to form the glass fiber bundles. The radioactive tail gas treatment filter element in the embodiment can be used for capturing and removing liquid and aerosol in tail gas, and is high in filtering efficiency.
In this embodiment, the diameter of the glass fiber yarn is 8 to 25 μm, and the glass fiber bundle made of the glass fiber yarn in this diameter range and the filter layer 17 wound by the glass fiber bundle can capture and remove the liquid and aerosol in the exhaust gas.
Preferably, the diameter of the glass fiber filaments is 8 to 10 μm.
In this embodiment, the thickness of the filter layer 17 is 45-50mm, the filter layer 17 with the thickness in this range can be used for capturing and removing liquid and aerosol in the exhaust gas, the collection efficiency of the liquid and the aerosol can reach 99%, and the problem of secondary entrainment of the liquid and the aerosol in the radioactive exhaust gas can be effectively prevented.
In this embodiment, the radioactive tail gas treatment filter element further comprises a support layer, and the support layer is used for supporting the filter layer 17 to prevent the radioactive tail gas treatment filter element from collapsing in the operation process.
The supporting layers comprise an inner supporting layer 18 and an outer supporting layer 19, the inner supporting layer 18 is cylindrical, the cylindrical inner supporting layer 18 is made of a steel wire mesh, and glass fiber bundles are wound on the outer surface of the inner supporting layer 18.
The outer support layer 19 is also made of steel wire mesh, wraps around the filter layer 17, and is bound to the filter layer 17 by a binding band.
The radioactive tail gas treatment filter core of this embodiment not only can dehumidify the filtration treatment to radioactive tail gas, and filtration efficiency is high, can effectively prevent the problem of the radioactive tail gas secondary entrainment liquid and aerosol after the processing.
Example 2:
the embodiment discloses a radioactive exhaust filter, which comprises a shell 5 and a filter element as shown in fig. 2, wherein the filter element adopts the radioactive exhaust treatment filter element 1 of the embodiment 1, and the radioactive exhaust treatment filter element 1 is arranged in the shell 5.
In this embodiment, the housing 5 is provided with the air inlet 2 and the air outlet 3, and the radioactive tail gas enters from the air inlet 2, is filtered by the radioactive tail gas treatment filter element, and is discharged to the outside of the radioactive tail gas filter through the air outlet 3.
The radioactive tail gas filter of the embodiment can effectively realize the dehumidification operation of the radioactive tail gas by adopting the radioactive tail gas filter, and has the advantages of simple structure and convenient operation.
In this embodiment, the radioactive exhaust filter is hung on the building surface.
In this embodiment, the radioactive exhaust filter further includes a support assembly and a connecting rod 24, the support assembly is disposed in the housing 5, and includes an upper end cover 20, a lower end cover 21 and a support rod 23, and two ends of the support rod 23 are respectively connected to the upper end cover 20 and the lower end cover 21, so as to enhance the strength of the radioactive exhaust filter.
In addition, two end parts of the radioactive tail gas treatment filter element 1 are respectively fixedly connected with the upper end cover 20 and the lower end cover 21, and the joint of the filter layer 17 of the radioactive tail gas treatment filter element 1 and the upper end cover 20 and the lower end cover 21 is fixed by adopting a non-adhesive agent for preventing the filter layer 13 from being separated from the upper end cover 20 and the lower end cover 21.
One end of the connecting rod 24 is connected with the building surface course, and the other end is connected with the upper end cover 20.
Specifically, a groove is formed in the upper surface of the upper end cover 20, a protrusion is formed at one end of the connecting rod 24, the connecting rod 24 extends into the groove in the upper end cover 20 through the protrusion at the end to be connected with the upper end cover 20, and the connecting rod and the upper end cover are fastened through a bolt assembly.
In this embodiment, one end of the support rod 23 is welded to the upper end cap 20, and the other end is connected to the lower end cap 21 through a first thread structure.
Preferably, a protective cover is further disposed outside the lower end cap 21, and the lower end cap 21 and the protective cover are connected through a sealing assembly.
In this embodiment, the protective cover is disposed outside the lower end cap 21 and covers the outer side of the first thread structure, so as to prevent the gas in the filter element from leaking through the gap between the first thread structure and the support rod 23 or the lower end cap 21.
In this embodiment, the seal assembly includes a seal 22 and a second threaded structure for connecting the lower end cap 21 with the protective cover.
The sealing gasket 22 is arranged between the lower end cover 21 and the protective cover, and the sealing gasket 22 is wrapped around the second thread structure, so that gas can be prevented from leaking from gaps among the second thread structure, the lower end cover 21 and the protective cover.
Preferably, the sealing gasket 22 is lip-shaped, so that the sealing gasket 22 can be wrapped around the second thread structure more tightly, and better sealing performance is provided for the connection part of the second thread structure and the lower end cover 21 and the protective cover.
In this embodiment, the radioactive exhaust filter further includes a shielding cover plate 6 and a plug plate 8, wherein the shielding cover plate 6 is disposed on the building surface layer, the shielding cover plate 6 is provided with a through hole, and the plug plate 8 is used for blocking the through hole.
The bottom end of the plug plate 8 is fixedly connected with the connecting rod 24.
Specifically, the plug plate 8 is clamped in a through hole of the shielding cover plate 6 through an annular insert 7, the longitudinal section of the through hole is in a step shape, and the longitudinal section of the corresponding insert 7 is also in a step shape. The shielding cover 6 can be connected to the building facade by means of inserts 7.
In this embodiment, to shield apron 6 and link to each other with the building surface course through inserts 7, can make the shielding apron 6 more firm with being connected of building surface course, and the shape of the contact surface of inserts 7 and building surface course can design according to the shape of building surface course for the range of application of shielding apron 6 is wider, and its installation does not receive the restriction of building surface course shape.
The shielding cover plate 6 is used for shielding radioactive substances in the radioactive exhaust filter, and operation personnel are prevented from being irradiated. The thickness of the shielding cover plate 6 is determined according to the radioactivity level of the radioactive tail gas in the actual working condition.
In this embodiment, insert 7 passes through bolt and nut subassembly and 6 fixed connection of shielding apron to, be equipped with the recess on insert 7's the hole pore wall, be equipped with the arch on the outer wall of cock board 8 correspondingly.
In this embodiment, the radioactive exhaust filter further includes a pressing plate 9, the pressing plate 9 is disposed on the plug plate 8 and located outside the building surface layer, and the periphery of the pressing plate 9 is hermetically connected with the shielding cover plate 6, so as to press the plug plate 8 in the insert 7.
In this embodiment, the connection unit includes a bolt and nut assembly, and the insert 7 is fixedly connected to the shield cover 6 through the bolt and nut assembly.
In this embodiment, the radioactive exhaust filter further includes a unhooking and pressing mechanism 10, and one end of the unhooking and pressing mechanism 10 is connected to the plug plate 8, and the other end is connected to the connecting rod 24.
The unhooking and pressing mechanism 10 is used for connecting 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.
In this embodiment, be provided with the interface that links to each other with the gripping apparatus on the cock board 8, when radioactive tail gas treatment filter core 1 need overhaul or change, can link to each other with the interface of cock board 8 through the gripping apparatus, and with cock board 8 through the hoist, unhook hold-down mechanism 10, connecting rod 24 and radioactive tail gas treatment filter core 1 hang into the maintenance container from casing 5 simultaneously, just can realize the maintenance and the change of radioactive tail gas treatment filter core 1, after changing new radioactive tail gas treatment filter core, again with cock board 8, unhook hold-down mechanism 10, connecting rod 24 and new radioactive tail gas treatment filter core hoist to the casing 5 of radioactive tail gas filter in.
The radioactive tail gas treatment filter element 1 of this embodiment can be replaced by a detachable way, when the radioactive tail gas treatment filter element 1 is replaced, the radioactive tail gas treatment filter element 1 is only required to be taken out from the shell 5 through a lifting appliance, and a new radioactive tail gas treatment filter element is installed in an overhaul container, so that the structures of other parts in the shell 5 and the radioactive tail gas filter are not affected, the operation is convenient, and the radiation to operators is reduced.
Preferably, the surface of the plug plate 8, which is far away from the radioactive exhaust gas treatment filter element 1, is covered with stainless steel, and is used for welding the plug plate 8 with the shielding cover plate 6.
In this embodiment, the shielding cover plate 6 is used for shielding radiation, and the thickness of the shielding cover plate 6 is calculated according to the radioactivity level of the gas in the hot chamber, so as to ensure that the radioactivity level contacted by people is controlled within a standard range.
In this embodiment, drain outlet 4 is equipped with to radioactive tail gas filter's 5 bottoms of casing, radioactive tail gas passes through air inlet 2 and gets into in the radioactive tail gas filter, and the air inlet is located radioactive tail gas treatment filter core 1's below, then let in radioactive tail gas treatment filter core 1, this radioactive tail gas treatment filter core 1 is the tubular structure, liquid drop and aerosol that radioactive tail gas smugglies have carried on abundant motion and collision back in radioactive tail gas treatment filter core 1, discharge outlet 4 from 5 bottoms of casing is discharged, the tail gas after the purification passes through 3 discharges of gas outlets of casing, and carry to the subsequent processing equipment.
The radioactive tail gas filter of the embodiment can effectively realize dehumidification and filtration operation of radioactive tail gas, and is simple in structure and convenient to operate.
Example 3:
the embodiment discloses a radioactive exhaust gas treatment system, which comprises a radioactive exhaust gas filter and a cleaning device in embodiment 2, as shown in fig. 3.
Wherein, radioactive tail gas filter and cleaning device all set up in the hot chamber.
The cleaning device comprises a spray head 15 and a deionized water conveying pipeline, wherein the spray head 15 is arranged in the shell 5 of the radioactive tail gas filter and is positioned above the radioactive tail gas treatment filter element 1 and used for cleaning the radioactive tail gas treatment filter element 1.
The deionized water delivery pipe is communicated with the spray head 15 and used for delivering deionized water into the spray head 15.
Preferably, the number of the spray heads 15 is multiple, the multiple spray heads 15 are uniformly arranged above the radioactive exhaust gas treatment filter element 1, and the nozzles of the spray heads 15 are arranged towards the radioactive exhaust gas treatment filter element.
In this embodiment, the cleaning unit further includes a washing loop 14, the washing loop 14 is disposed above the radioactive exhaust treatment filter element 1, and the plurality of nozzles 15 are uniformly disposed on the washing loop 14.
In this embodiment, the radioactive exhaust gas treatment system further includes a pressure monitor 11 and a controller.
The pressure monitor 11 is electrically connected with the controller, is arranged on the air inlet 2 of the shell 5 of the radioactive exhaust filter, and is used for measuring the pressure of the air inlet 2 in the radioactive exhaust filter and transmitting the measured pressure value to the controller.
In this embodiment, the cleaning apparatus further includes a deionized water pipeline valve 12, and the deionized water pipeline valve 12 is disposed on the deionized water conveying pipeline and used for controlling the on/off of the deionized water conveying pipeline.
In this embodiment, the controller is further electrically connected to the deionized water pipeline valve 12, and is configured to compare the received pressure value with a stored pressure preset value therein, and control the opening and closing of the deionized water pipeline valve 12 according to a comparison result.
Specifically, be equipped with pressure monitor 11 on the air inlet 2 of the casing 5 of radioactive tail gas filter, pressure monitor 11 measures the pressure of air inlet 2 in the radioactive tail gas filter, and send the pressure value to the controller, the controller receives the pressure value, and compare with its stored pressure value, wherein, preset the pressure value and include first preset pressure value and second preset pressure value, when the pressure value is greater than first preset pressure value, controller control deionized water pipeline valve 12 is opened, deionized water washes ring canal 14 through washing, spout deionized water again from shower nozzle 15 and wash the cleanness to the inner wall of casing 5 of radioactive tail gas treatment filter core and radioactive tail gas filter. When the measured pressure value is smaller than a second preset pressure value, the controller controls the deionized water pipeline valve 12 to be closed, and the radioactive tail gas filter stands until the radioactive tail gas filter is dry.
In this embodiment, the first preset pressure value may be set to 2 times the initial resistance of the air inlet 2 of the radioactive exhaust filter. The second preset pressure value may be set as the initial resistance of the inlet 2 of the radioactive exhaust filter.
In this embodiment, if the measured pressure value does not reach the second preset pressure value, the cleaning device performs the circulation cleaning operation. When the pressure requirement cannot be met after repeated times, the radioactive exhaust gas treatment filter element 1 is considered to be required to be replaced.
In this embodiment, the bottom of the housing 5 of the radioactive exhaust filter is provided with a drain port 4, and the deionized water and the liquid drops collected during normal operation are conveyed to the waste liquid collector 16 through the drain port 4 under the gravity flow effect to wait for further treatment.
The radioactive tail gas treatment system of this embodiment can dehumidify the radioactive tail gas by adopting the above-mentioned radioactive tail gas filter, and can directly carry out cleaning operation to the radioactive tail gas treatment filter core through the cleaning device among the processing system, thereby can effectual extension radioactive tail gas treatment filter core's life, reduce the change frequency of radioactive tail gas treatment filter core, reduce the wastes material production volume, and reduce radioactive tail gas treatment system's running cost.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (10)
1. The radioactive tail gas treatment filter element is characterized by comprising a filter layer, wherein the filter layer is formed by winding a glass fiber bundle, the glass fiber bundle comprises a plurality of micron-sized glass fiber yarns, and the micron-sized glass fiber yarns are spirally interwoven.
2. The radioactive exhaust treatment filter cartridge according to claim 1, wherein the glass fiber filaments have a diameter of 8-25 μm;
the thickness of the filter layer is 45-50 mm.
3. The radioactive exhaust treatment filter element according to claim 1, further comprising a support layer for supporting the filter layer;
the support layers include an inner support layer and an outer support layer,
the inner supporting layer is cylindrical, the cylindrical inner supporting layer is made of a steel wire mesh, and the glass fiber bundles are wound on the outer surface of the inner supporting layer;
the outer supporting layer is also made of a steel wire mesh, wrapped outside the filtering layer and bound on the filtering layer through a binding belt.
4. A radioactive exhaust gas filter comprising a housing and a filter element, wherein the filter element is the radioactive exhaust gas treatment filter element according to any one of claims 1 to 3,
the radioactive tail gas treatment filter element is arranged in the shell;
the shell is provided with an air inlet (2) and an air outlet (3);
and the radioactive tail gas enters from the gas inlet, is filtered by the radioactive tail gas treatment filter element and then is discharged out of the radioactive tail gas filter through the gas outlet.
5. The radioactive exhaust filter according to claim 4, wherein the radioactive exhaust filter is suspended from a building facing,
the radioactive exhaust filter also comprises a support component and a connecting rod,
the supporting component is arranged in the shell and comprises an upper end cover, a lower end cover and a supporting rod, and two ends of the supporting rod are respectively connected with the upper end cover and the lower end cover;
two end parts of the radioactive tail gas treatment filter element are respectively fixedly connected with the upper end cover and the lower end cover, and the joint of the filter layer of the radioactive tail gas treatment filter element and the upper end cover and the lower end cover is fixed by adopting a non-adhesive agent;
one end of the connecting rod is connected with the building surface layer, and the other end of the connecting rod is connected with the upper end cover.
6. The radioactive exhaust filter according to claim 5, wherein one end of the support rod is welded to the upper end cap, and the other end of the support rod is connected to the lower end cap by a first screw structure;
the lower end cover is also provided with a protective cover, and the lower end cover is connected with the protective cover through a sealing component.
7. The radioactive exhaust filter according to claim 5, further comprising a shielding cover plate and a plug plate (8),
the shielding cover plate is arranged on the building surface layer, a perforation is arranged on the shielding cover plate, the plug plate is used for plugging the perforation,
the bottom end of the plug plate is fixedly connected with the connecting rod.
8. The radioactive exhaust filter according to claim 7, wherein said plug is engaged in a through hole of said shielding cover plate by an annular insert, said through hole having a longitudinal section of a stepped shape, and correspondingly, said insert having a longitudinal section of a stepped shape,
the insert is fixedly connected with the shielding cover plate through a bolt and nut assembly, the hole wall of an inner hole of the insert is provided with a groove, the outer wall of the plug plate is correspondingly provided with a bulge,
the filter also comprises a pressing plate (9), the pressing plate is arranged on the plug plate and positioned outside the building surface layer, and the periphery of the pressing plate is connected with the shielding cover plate in a sealing mode.
9. A radioactive exhaust gas treatment system, comprising the radioactive exhaust gas filter according to any one of claims 4 to 8, and a cleaning device,
the radioactive tail gas filter and the cleaning device are both arranged in the hot chamber;
the cleaning device comprises a spray head and a deionized water conveying pipeline, wherein the spray head is arranged in the shell of the radioactive tail gas filter, is positioned above the radioactive tail gas treatment filter element and is used for cleaning the radioactive tail gas treatment filter element;
the deionized water conveying pipeline is communicated with the spray head and used for conveying deionized water into the spray head.
10. The radioactive exhaust treatment system according to claim 9, wherein the treatment system further comprises a pressure monitor and a controller,
the pressure monitor is electrically connected with the controller, is arranged at an air inlet of a shell of the radioactive exhaust filter, and is used for measuring the pressure of the air inlet in the radioactive exhaust filter and transmitting the measured pressure value to the controller;
the cleaning device also comprises a deionized water pipeline valve, and the deionized water pipeline valve is arranged on the deionized water conveying pipeline;
the controller is also electrically connected with the deionized water pipeline valve and is used for comparing the received pressure value with a pressure preset value stored in the controller and controlling the opening and closing of the deionized water pipeline valve according to a comparison result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110587023.7A CN113198272A (en) | 2021-05-27 | 2021-05-27 | Radioactive tail gas treatment filter element, filter and treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110587023.7A CN113198272A (en) | 2021-05-27 | 2021-05-27 | Radioactive tail gas treatment filter element, filter and treatment system |
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| Publication Number | Publication Date |
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| CN113198272A true CN113198272A (en) | 2021-08-03 |
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| CN202110587023.7A Pending CN113198272A (en) | 2021-05-27 | 2021-05-27 | Radioactive tail gas treatment filter element, filter and treatment system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114011159A (en) * | 2021-10-21 | 2022-02-08 | 中国核电工程有限公司 | Cleaning device and method for radioactive filter element |
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| CN114011159A (en) * | 2021-10-21 | 2022-02-08 | 中国核电工程有限公司 | Cleaning device and method for radioactive filter element |
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