Nuclear island air circulation purification device and method

Abstract

The invention provides a nuclear island air circulation purification device and method. The nuclear island air circulation purification device comprises an air inlet barrel, a draught fan, an air outlet barrel and a filtering assembly. The air inlet cylinder, the fan and the air outlet cylinder are sequentially arranged and connected in the axial direction of the fan. The air inlet cylinder and the air outlet cylinder are of a structure with the two ends penetrating in the axial direction, a filtering assembly is arranged between the air inlet cylinder and an air inlet of the draught fan, and a filtering assembly is arranged between an air outlet of the draught fan and the air outlet cylinder. The filter assembly is perpendicular to the axial direction and covers an air inlet and an air outlet of the fan.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of nuclear island air circulation, and in particular to a nuclear island air circulation purification device and method. BACKGROUND

[0002] The nuclear island, as the core part of nuclear power generation, has a large number of internal spaces and a complex structure. During construction and installation, the interior of the nuclear island is relatively closed, and due to the operation of various devices and the process construction in the interior of the nuclear island, a large amount of dust and other air pollutants and heat will be generated in the interior of the nuclear island, resulting in turbid air and low air quality, which not only threatens the health of the operating personnel, but also affects the protection of the finished products of the installed equipment.

[0003] At present, the commonly used technical means for nuclear island air purification is to arrange temporary air pipes, including air supply pipes and exhaust air pipes, and cooperate with air fans to replace the ventilation of the interior space of the nuclear island. The arrangement of the air pipe needs to set reliable hanging points to fix the air pipe, and ensure that the air pipe does not hinder the passage and transportation of the operating personnel, and the hanging point position is continuously adjusted according to the construction progress. However, through practice, the method of arranging temporary air pipes does not have good purification effect on the pollutants in the air, and cannot reduce the space heat, and the power requirement of the air fan is large but cannot produce effective air speed. SUMMARY

[0004] The purpose of the present application is at least to provide a high-efficiency nuclear island air circulation purification device, which is of great significance for improving the air quality in the interior of the nuclear island, ensuring the health and safety of the operating personnel, and ensuring the normal operation of the equipment.

[0005] The following gives a brief summary of one or more aspects to provide a basic understanding of these aspects. This summary is not an exhaustive overview of all contemplated aspects, and neither is it intended to identify key or critical elements of all aspects nor to delineate the scope of any or all aspects. Its only purpose is to give some concepts of one or more aspects in a simplified form as a prelude to the more detailed description given later.

[0006] One of the embodiments of the present application provides a nuclear island air circulation purification device, which comprises an air inlet cylinder, an air fan, an air outlet cylinder and a filter assembly; the air inlet cylinder, the air fan and the air outlet cylinder are connected in sequence along the axial direction of the air fan; the air inlet cylinder and the air outlet cylinder are both structures with both ends penetrating along the axial direction, the filter assembly is arranged between the air inlet cylinder and the air inlet of the air fan, and the filter assembly is arranged between the air outlet of the air fan and the air outlet cylinder; the filter assembly is arranged perpendicular to the axial direction, and the filter assembly covers the air inlet and the air outlet of the air fan.

[0007] In some embodiments, the filtering assembly comprises filter cotton and a mesh fixing member, the filter cotton and the mesh fixing member covering the air inlet and the air outlet of the fan; in the axial direction, the filter cotton is fixed between the air inlet cylinder and the mesh fixing member, and the filter cotton is fixed between the mesh fixing member and the air outlet cylinder.

[0008] In some embodiments, the radial dimension of the filter cotton and the mesh fixing member is greater than the radial dimension of the air inlet, the air outlet, the air inlet cylinder and the air outlet cylinder, wherein the radial plane is perpendicular to the axial direction; the end of the air inlet cylinder close to the fan and the air inlet each have a first fixed edge extending radially outward, the air inlet cylinder and the air inlet are fixedly connected through the first fixed edges thereof, and the filter cotton and the mesh fixing member are crimped between the first fixed edges; the end of the air outlet cylinder close to the fan and the air outlet have a second fixed edge extending radially outward, the air outlet cylinder and the air outlet are fixedly connected through the second fixed edges thereof, and the filter cotton and the mesh fixing member are crimped between the second fixed edges.

[0009] In some embodiments, the nuclear island air circulation purification device comprises an air inlet cover and an air outlet cover; the air inlet cover is arranged on the end of the air inlet cylinder away from the fan, and the air inlet cover is provided with a plurality of ventilation holes; the air outlet cover is arranged on the end of the air outlet cylinder away from the fan, and the air outlet cover is provided with a plurality of ventilation holes.

[0010] In some embodiments, the air inlet cover is clamped to the end of the air inlet cylinder away from the fan; or the air outlet cover is clamped to the end of the air outlet cylinder away from the fan.

[0011] In some embodiments, the air inlet cylinder is provided with a plurality of ventilation holes on the circumferential side thereof; or the air outlet cylinder is provided with a plurality of ventilation holes on the circumferential side thereof.

[0012] In some embodiments, the nuclear island air circulation purification device comprises a sensor integration and a controller; the sensor integration is arranged on one side of the air outlet and is used for detecting air outlet values, including air outlet pressure and air quality index; the sensor integration is signal-connected with the controller, and the controller is used for controlling the operating power of the fan and starting and stopping according to the air outlet values detected by the sensor integration.

[0013] In some embodiments, the nuclear island air circulation purification device comprises a display module, the controller can record the actual use time and the theoretical use time of the filtering assembly, the display module is signal-connected with the controller, and the display module is used for displaying the current air outlet values and the difference between the actual use time and the theoretical use time of the filtering assembly.

[0014] In some embodiments, the nuclear island air circulation purification device comprises a movable support, the movable support is used for supporting the fan to a certain height, and universal wheels are arranged at the bottom of the movable support to realize the movement of the nuclear island air circulation purification device.

[0015] One of the embodiments of the present application provides a nuclear island air circulation purification method applied to the nuclear island air circulation purification device, the method comprising: obtaining the air outlet wind pressure on the side of the air outlet, if the air outlet wind pressure is lower than the preset value, stopping the operation of the fan and prompting to replace the filter assembly; obtaining the air quality index on the side of the air outlet, if the air quality index is lower than the preset value, increasing the operation power of the fan; recording the actual use time and the theoretical use time of the filter assembly, if the actual use time is close to or equal to the theoretical use time, stopping the operation of the fan and prompting to replace the filter assembly.

[0016] The nuclear island air circulation purification device relates to the present application, which is of great significance for improving the air quality inside the nuclear island, ensuring the health and safety of the operating personnel, and ensuring the normal operation of the equipment. The fan drives the air flow in the nuclear island space, and the filter assembly is used to filter and purify the smoke in the air during the air flow process, which can improve the purification efficiency in the flow state. The nuclear island air circulation purification device arranged along the axial direction of the fan reduces the occupation of the passage and avoids forming construction obstacles. A large amount of flow air generated by the fan can effectively assist heat dissipation and reduce the heat effect of the closed space on the human body.

[0017] The nuclear island air circulation purification device can provide a comfortable working environment, ensure that the working environment has clean fresh air, and reduce the passage obstacles. By using air circulation purification, the turbid air inside the nuclear island can be quickly sucked in, and 80% of the pollutants such as dust and harmful dust in the air can be removed through multiple filtering and purification processes. BRIEF DESCRIPTION OF DRAWINGS

[0018] The above features and advantages of the present application can be better understood after reading the detailed description of the embodiments of the present application in conjunction with the following drawings. In the drawings, the components are not necessarily drawn to scale, and the components having similar related properties or features can have the same or similar reference numerals. Among them:

[0019] Figure 1 is a structural schematic diagram of a nuclear island air circulation purification device according to some embodiments;

[0020] Figure 2 is a flow schematic diagram of a nuclear island air circulation purification method according to some embodiments. DETAILED DESCRIPTION

[0021] The present application is described in detail below in conjunction with the drawings and specific embodiments. Note that the aspects described below in conjunction with the drawings and specific embodiments are only exemplary and should not be understood as limiting the scope of protection of the present application in any way.

[0022] It should be understood that the terms "system", "apparatus", "unit" and / or "module" used herein are a method for distinguishing different components, elements, parts, sections or assemblies from one another. However, if other words can achieve the same purpose, the words can be replaced by other expressions.

[0023] It can be understood that the technical terms involved in the description of the specification, such as "center", "longitudinal", "transverse", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the embodiments, and does not indicate or imply that the device or element referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the scope of protection of the invention.

[0024] It should be noted that the terms "first", "second" and the like used herein to define features are only for the convenience of distinguishing the corresponding features, and the above terms have no special meaning unless otherwise stated. Therefore, they cannot be understood as a limitation on the scope of protection of the invention. As shown in the specification and claims, the terms "a", "an", "one", and / or "the" do not refer to a single number, but also include a plurality, unless the context clearly indicates otherwise. Generally, the terms "include" and "contain" only indicate the inclusion of the steps and elements explicitly identified, and these steps and elements do not constitute an exclusive list, and the method or device can also include other steps or elements.

[0025] In the description of the specification, it should be noted that unless otherwise explicitly specified or limited, the terms "mount", "connect", "connect" should be understood broadly, for example, it can be a fixed connection, it can be integrally connected, or it can be detachably connected; it can be a mechanical connection, or it can be an electrical connection; it can be directly connected, or it can be indirectly connected through an intermediate medium, or the connection between two elements inside, etc. For those skilled in the art, the specific meaning of the above terms in the specification can be understood according to the specific circumstances.

[0026] The embodiment of the specification proposes a nuclear island air circulation purification device, as shown in Figure 1 The nuclear island air circulation purification device includes an air inlet cylinder 7, a fan 6, an air outlet cylinder 3 and a filter assembly. The air inlet cylinder 7, the fan 6 and the air outlet cylinder 3 are connected in sequence along the axial direction of the fan 6.

[0027] The fan 6 is an axial fan, and the axial direction of the fan 6 (see Figure 1 ) is consistent with the air inlet direction. The fan 6 provides power for the air in the internal space of the nuclear island, so that the air can move along the specified route and accelerate the air flow in the space.

[0028] The air inlet cylinder 7 and the air outlet cylinder 3 are both axially through structures, and the air inlet cylinder 7 and the air outlet cylinder 3 are used for guiding the flow direction of the air. The air inlet cylinder 7 and the air outlet cylinder 3 are circular cylinder structures, and are used for connecting the air inlet and the air outlet of the fan 6. In some embodiments, a plurality of air holes are arranged on the side of the air inlet cylinder 7, so as to increase the air volume of the air inlet. In some embodiments, a plurality of air holes are arranged on the side of the air outlet cylinder 3, so as to increase the air volume of the air outlet.

[0029] The filter assembly is arranged between the air inlet cylinder 7 and the air inlet of the fan 6, and the filter assembly is arranged between the air outlet of the fan 6 and the air outlet cylinder 3. The filter assembly extends along a plane which is perpendicular to the axial direction of the fan 6. The filter assembly covers the air inlet and the air outlet of the fan 6, and is used for filtering the turbid air into clean air.

[0030] The turbid air in the nuclear island space is sucked by the fan 6 according to the embodiments of the present application, and after the turbid air passes through the filter assembly from the air inlet cylinder 7 and filters out most of the smoke dust in the turbid air, the turbid air enters the fan 6. The fan 6 is accelerated again, and the smoke dust in the air is filtered out again through the filter assembly. Finally, the clean air is discharged through the air outlet cylinder 3 and returns to the nuclear island space again.

[0031] In some embodiments, the filter assembly includes filter cotton 4 and a mesh fixing member 5, and the filter cotton 4 and the mesh fixing member 5 cover the air inlet and the air outlet of the fan 6. The filter cotton 4 can filter the turbid air into clean air, and the filter cotton 4 can be replaced. In the axial direction of the fan 6, the filter cotton 4 is fixed between the air inlet cylinder 7 and the mesh fixing member 5, and the filter cotton 4 is fixed between the mesh fixing member 5 and the air outlet cylinder 3. The mesh fixing member 5 is used for fixing the filter cotton 4, and can also prevent foreign matters from entering the fan 6 and prevent the blades of the fan 6 from being damaged by the foreign matters. The filter cotton 4 and the mesh fixing member 5 both extend along a plane which is perpendicular to the axial direction of the fan 6.

[0032] In some embodiments, the radial dimension of the filter cotton 4 and the mesh fixing member 5 is greater than the radial dimension of the air inlet, the air outlet, the air inlet cylinder 7 and the air outlet cylinder 3, wherein the plane in which the radial direction is perpendicular to the axial direction. In other words, the outer diameter dimension of the filter cotton 4 and the mesh fixing member 5 is greater than the inner diameter dimension of the air inlet, the air outlet, the air inlet cylinder 7 and the air outlet cylinder 3, and the filter cotton 4 and the mesh fixing member 5 can be clamped between the air inlet cylinder 7 and the air inlet, and the filter cotton 4 and the mesh fixing member 5 can be clamped between the air outlet cylinder 3 and the air outlet.

[0033] In some embodiments, the air inlet cylinder 7 and the air inlet port each has a first fixed edge extending radially outward, the air inlet cylinder 7 is fixedly connected with the air inlet port through the first fixed edges thereof, and the filter cotton 4 and the mesh fixing member 5 are pressed between the first fixed edges. In some embodiments, the air inlet cylinder 7 and the air inlet port each has a first fixed edge extending radially outward, the first fixed edge of the air inlet cylinder 7 is fixedly connected with the first fixed edge of the air inlet port through a bolt or a screw, the bolt or the screw passes through the first fixed edge of the air inlet cylinder 7, then passes through the filter cotton 4 and the mesh fixing member 5, and then passes through the first fixed edge of the air inlet port, and the bolt or the screw fixedly connects the air inlet cylinder 7, the filter cotton 4, the mesh fixing member 5 and the air inlet port.

[0034] In some embodiments, the air outlet cylinder 3 and the air outlet port each has a second fixed edge extending radially outward, the air outlet cylinder 3 is fixedly connected with the air outlet port through the second fixed edges thereof, and the filter cotton 4 and the mesh fixing member 5 are pressed between the second fixed edges. In some embodiments, the air outlet cylinder 3 and the air outlet port each has a second fixed edge extending radially outward, the second fixed edge of the air outlet cylinder 3 is fixedly connected with the second fixed edge of the air outlet port through a bolt or a screw, the bolt or the screw passes through the second fixed edge of the air outlet cylinder 3, then passes through the filter cotton 4 and the mesh fixing member 5, and then passes through the second fixed edge of the air inlet port, and the bolt or the screw fixedly connects the air inlet cylinder 7, the filter cotton 4, the mesh fixing member 5 and the air inlet port.

[0035] In some embodiments, the nuclear island air circulation purification device includes an air inlet cover 8 and an air outlet cover 1. The air inlet cover 8 is arranged on the end of the air inlet cylinder 7 away from the air fan 6, and a plurality of air holes are arranged on the air inlet cover 8. The air outlet cover 1 is arranged on the end of the air outlet cylinder 3 away from the air fan 6, and a plurality of air holes are arranged on the air outlet cover 1. The arrangement of the air inlet cover 8 and the air outlet cover 1 can prevent foreign matters from entering the nuclear island air circulation purification device, thereby protecting the nuclear island air circulation purification device and the personal safety of the workers.

[0036] In some embodiments, the air inlet cover 8 is clamped to the end of the air inlet cylinder 7 away from the air fan 6 through a buckle 2. In some embodiments, the air outlet cover 1 is clamped to the end of the air outlet cylinder 3 away from the air fan 6 through the buckle 2. The arrangement of the clamped air inlet cover 8 or the air outlet cover 1 facilitates the disassembly of the air inlet cover 8 or the air outlet cover 1. In some embodiments, handles 9 are arranged on the air inlet cover 8 and the air outlet cover 1, which facilitates the holding and moving of the air inlet cover 8 or the air outlet cover 1 during the disassembly thereof.

[0037] In some embodiments, the nuclear island air circulation purification device includes a sensor integration 10 and a controller 11. The sensor integration 10 is arranged on one side of the air outlet port. For example, the sensor integration 10 is arranged in the air outlet cylinder 3. For another example, as shown in FIG. 6, the sensor integration 10 is arranged on the air outlet cylinder 3. Figure 1As shown, the sensor integration 10 is arranged at one end of the air outlet cylinder 3 close to the fan 6. The sensor integration 10 is used to detect the air outlet values, including the air outlet pressure, the air quality index, etc. The air quality index includes the PM2.5 air concentration, the sulfur dioxide air concentration, etc. The sensor integration 10 is in signal connection with the controller 11, and the controller 11 is used to control the running power of the fan 6 and start or stop the fan 6 according to the air outlet values detected by the sensor integration 10.

[0038] In some embodiments, the nuclear island air circulation purification device includes a display module or a sound module, the controller 11 can record the actual use time and the theoretical use time of the filter assembly, the display module or the sound module is in signal connection with the controller 11, the display module is used to display the current air outlet value and the difference between the actual use time and the theoretical use time of the filter assembly, so as to prompt the remaining service life of the filter assembly, and the sound module is used to emit sound to prompt that the actual use time of the filter assembly is close to or equal to the theoretical use time.

[0039] The embodiments of the present specification also provide a nuclear island air circulation purification method, which includes: obtaining the air outlet pressure on the air outlet side, and stopping the running of the fan 6 if the air outlet pressure is lower than a preset value, and prompting to replace the filter assembly. In some embodiments, the air outlet pressure on the air outlet side is obtained, and the running of the fan 6 is stopped if the air outlet pressure is lower than a preset value, and the filter cotton 4 is prompted to be replaced. In some embodiments, the air quality index on the air outlet side is obtained, and the running power of the fan 6 is increased if the air quality index is lower than a preset value.

[0040] In some embodiments, the actual use time and the theoretical use time of the filter assembly, i.e. the filter cotton 4, are recorded, and the difference between the theoretical use time and the actual use time is the remaining service life of the filter cotton 4. If the actual use time is close to or equal to the theoretical use time, the running of the fan 6 is stopped, and the filter assembly is prompted to be replaced. In some embodiments, if the actual use time is close to or equal to the theoretical use time, the running of the fan 6 is stopped, and the filter cotton 4 is prompted to be replaced, so as to prevent the fan 6 from being scrapped due to the idling of the fan 6.

[0041] As shown in FIG. 1, the nuclear island air circulation purification device includes an air outlet cylinder 3, a filter assembly, a fan 6, a sensor integration 10 and a controller 11. Figure 2As shown, the nuclear island air circulation purification method further comprises: starting the fan 6, the fan 6 runs at an initial speed, the sensor (i.e., the sensor set 10) monitors and feeds back the measured value, obtaining the measured value of the sensor, determining whether the measured value reaches the set value, including: determining whether the outlet air pressure reaches the set value, the set value is greater than or equal to the preset value, if the outlet air pressure reaches the set value, continue the original fan 6 speed. If the outlet air pressure does not reach the set value, continue to determine whether the fan 6 speed reaches the limit value. If the fan 6 speed reaches the limit value, the fan 6 is closed, and an alarm is given to remind replacing the filter (i.e., the filter assembly). If the fan 6 speed does not reach the limit value, adjust the fan 6 speed to run, the sensor continues to monitor and feed back the measured value, and so on. Determine whether the air quality index reaches the set value, the set value is greater than or equal to the preset value, if the air quality index reaches the set value, continue the original fan 6 speed. If the air quality index does not reach the set value, continue to determine whether the fan 6 speed reaches the limit value. If the fan 6 speed reaches the limit value, the fan 6 is closed, and an alarm is given to remind replacing the filter (i.e., the filter assembly). If the fan 6 speed does not reach the limit value, adjust the fan 6 speed to run, the sensor continues to monitor and feed back the measured value, and so on. Record the filter service life countdown, that is, the difference between the theoretical use time and the actual use time of the filter cotton 4, that is, the remaining service life, determine whether the remaining service life reaches the set value (for example, 0h or 1h, etc.). If the remaining service life reaches the set value, the fan 6 is closed, and an alarm is given to remind replacing the filter (i.e., the filter assembly). If the remaining service life does not reach the set value, continue to record the filter service life countdown.

[0042] In some embodiments, the nuclear island air circulation purification device comprises a movable support 14. The movable support 14 is used to support the fan 6 to a certain height. The movable support 14 is provided with a support bracket 13, which is used to support the bottom of the fan 6. The bottom of the movable support 14 is provided with universal wheels 15 to realize the movement of the nuclear island air circulation purification device.

[0043] The above has described the basic concept, and it is obvious that the above detailed disclosure is only used as an example for the person skilled in the art, and does not constitute a limitation on the specification. In addition, unless the claims explicitly state, the order of processing elements and sequences in the specification, the use of numerals and letters, or the use of other names, is not used to limit the order of the processes and methods of the specification. Although some currently considered useful embodiments of the invention are discussed in the above disclosure through various examples, it should be understood that such details are only for the purpose of illustration, and the additional claims are not limited to the disclosed embodiments, on the contrary, the claims are intended to cover all modifications and equivalent combinations that meet the spirit and scope of the embodiments.

Claims

1. A nuclear island air circulation purification device, characterized by, The nuclear island air circulation purification device comprises an air inlet cylinder, a fan, an air outlet cylinder and a filter assembly; The air inlet cylinder, the fan and the air outlet cylinder are sequentially arranged along the axial direction of the fan; The air inlet cylinder and the air outlet cylinder are both structures with both ends penetrating along the axial direction, the filter assembly is arranged between the air inlet cylinder and the air inlet of the fan, and the filter assembly is arranged between the air outlet of the fan and the air outlet cylinder; The filter assembly is arranged perpendicularly to the axial direction, and the filter assembly covers the air inlet and the air outlet of the fan.

2. The nuclear island air cleaning device according to claim 1, characterized in that, The filter assembly comprises filter cotton and a mesh fixing member, and the filter cotton and the mesh fixing member cover the air inlet and the air outlet of the fan; In the axial direction, the filter cotton is fixed between the air inlet cylinder and the mesh fixing member, and the filter cotton is fixed between the mesh fixing member and the air outlet cylinder.

3. The nuclear island air cleaning device according to claim 2, characterized in that The radial dimension of the filter cotton and the mesh fixing member is greater than the radial dimension of the air inlet, the air outlet, the air inlet cylinder and the air outlet cylinder, wherein the plane where the radial direction is located is perpendicular to the axial direction; The end of the air inlet cylinder close to the fan and the air inlet are respectively provided with first fixed edges extending outward along the radial direction, the air inlet cylinder and the air inlet are fixedly connected through the first fixed edges, and the filter cotton and the mesh fixing member are press-connected between the first fixed edges; The end of the air outlet cylinder close to the fan and the air outlet are provided with second fixed edges extending outward along the radial direction, the air outlet cylinder and the air outlet are fixedly connected through the second fixed edges, and the filter cotton and the mesh fixing member are press-connected between the second fixed edges.

4. The nuclear island air cleaning device of claim 1, wherein, The nuclear island air circulation purification device comprises an air inlet cover and an air outlet cover; The air inlet cover is arranged on the end of the air inlet cylinder away from the fan, and a plurality of air vents are arranged on the air inlet cover; The air outlet cover is arranged on the end of the air outlet cylinder away from the fan, and a plurality of air vents are arranged on the air outlet cover.

5. The nuclear island air cleaning device according to claim 4, characterized in that The air inlet cover is clamped to the end of the air inlet cylinder away from the fan; or The air outlet cover is clamped to the end of the air outlet cylinder away from the fan.

6. The nuclear island air cleaning device according to claim 4, characterized in that A plurality of air vents are arranged on the side of the air inlet cylinder; or a plurality of air vents are arranged on the side of the air outlet cylinder.

7. The nuclear island air cleaning device of claim 1, wherein, The nuclear island air circulation purification device comprises a sensor integration and a controller; The sensor integration is arranged on one side of the air outlet, and is used for detecting air outlet values, including air outlet pressure and air quality index; The sensor integration is signal-connected with the controller, and the controller is used for controlling the operation power of the fan and starting and stopping according to the air outlet values detected by the sensor integration.

8. The nuclear island air cleaning device according to claim 7, characterized in that The nuclear island air circulation purification device comprises a display module, the controller can record the actual use time and the theoretical use time of the filter assembly, the display module is signal-connected with the controller, and the display module is used for displaying the current air outlet values and the difference between the actual use time and the theoretical use time of the filter assembly.

9. The nuclear island air cleaning device of claim 1, wherein, The nuclear island air circulation purification device comprises a movable support for supporting the fan to a certain height, and universal wheels are arranged at the bottom of the movable support to realize the movement of the nuclear island air circulation purification device.

10. A nuclear island air circulation purification method, characterized by, The method is applied to the nuclear island air circulation purification device according to any one of claims 1-9, and the method comprises: an air outlet side air pressure is obtained, if the air outlet side air pressure is lower than a preset value, the fan operation is stopped, and replacement of the filter assembly is prompted; an air quality index of the air outlet side is obtained, if the air quality index is lower than a preset value, the operation power of the fan is increased; actual use time and theoretical use time of the filter assembly are recorded, if the actual use time is close to or equal to the theoretical use time, the fan operation is stopped, and replacement of the filter assembly is prompted.

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