Aerosol collection device based on electrostatic enrichment

Abstract

The invention discloses an aerosol collection device based on electrostatic enrichment, and relates to the technical field of radiation measurement equipment, according to the characteristic that aerosol particles carrying radiation are easy to ionize, aerosol particles in the environment are adsorbed by using a plurality of groups of electrostatic generators, so that the aerosol density of a sampling port is greatly improved, and the sampling precision is improved. And aerosol sampling can be completed by using a low-power fan. The electrostatic adsorption device is used for gathering aerosol particles in the environment, so that the requirement of the device on the sampling flow is greatly reduced, the dependence of collection on a high-power fan or an air pump is reduced, and the power consumption of equipment is greatly reduced. Meanwhile, the two processes of the device are independently carried out and cannot influence each other, and the collection efficiency of the aerosol cannot be influenced. By redesigning the aerosol collection process, the collection process is divided into two independent processes, so that the dependence of the collection process on a high-power fan is relieved.

Description

Technical Field

[0001] The invention relates to the technical field of radiation measurement equipment, and in particular to an aerosol collection device based on electrostatic enrichment. Background Art

[0002] Aerosol refers to a multiphase dispersion system formed by solid or liquid particles with the atmosphere as a carrier. The particle size is usually between 0.01 microns and tens of microns. The dispersion system with a radioactive dispersed phase is called a radioactive aerosol. Radioactive aerosol monitoring refers to obtaining the activity concentration of radioactive aerosols emitted from the environment by simultaneous or delayed measurement.

[0003] Patent document CN118687937A discloses a large-flow radioactive aerosol sampling device, including: a fan for drawing air from the environment into an air inlet chamber; an air inlet chamber for receiving the incoming air and distributing the air to various working channels of a collection chamber; a collection chamber including multiple working channels, under the action of an input voltage, an enabled working channel is used to ionize aerosol particles in the incoming air, and utilizes the generated electric field to collect the ionized aerosol particles by electrostatic adsorption, and discharge the remaining air to an air outlet chamber; an air outlet chamber is used to collect the air output from all working channels, and discharge it after concentration; a high-voltage power supply is used to provide input voltage to the collection chamber. Different from the most common existing radioactive aerosol sampling method that relies on high-power fans and filter paper filtration, this invention realizes radioactive aerosol sampling based on electrostatic adsorption, which has low power consumption, low noise, high collection efficiency and stable operation.

[0004] The above method can indeed greatly reduce the power consumption and noise of the aerosol sampling device, but the core method of the method has not changed. A large amount of gas is collected by a fan, and the fan is used for inhalation at the same time. The airflow generated by the fan drives the non-radioactive particles in the air to collide with the radiation particles that move vertically under the influence of the electric field, which greatly affects the collection efficiency of the radiation particles. Summary of the invention

[0005] In view of the above problems, the present invention provides an aerosol collection device based on electrostatic enrichment for overcoming the above problems or at least partially solving the above problems.

[0006] The present invention provides the following scheme:

[0007] An aerosol collection device based on electrostatic enrichment, comprising:

[0008] A detection chamber, wherein a detector module and a filter paper assembly are arranged in the detection chamber; the detection chamber comprises an air inlet and an air outlet, wherein the air inlet is connected to a sampling port, and the air outlet is connected to a collection power source;

[0009] A plurality of electrostatic generators, wherein the electrostatic generators are arranged inside the sampling port;

[0010] The detector module, the collection power source and the plurality of electrostatic generators are all connected to the controller; the controller is used to perform the following operations:

[0011] Controlling the electrostatic generators to be powered on, so that the electrostatic generators form multiple sets of strong electric fields in the space, so that the aerosol particles carrying radiation are ionized in the electric fields and gather near the electrostatic generators under the action of the electric fields to achieve the enrichment of the aerosol particles;

[0012] After determining that the enrichment time reaches a preset time limit, controlling the collection power source to start, so as to collect the aerosol particles near the electrostatic generator through the filter paper assembly;

[0013] The detector module is controlled to detect the dosage of the aerosol particles on the filter paper assembly until the dosage data no longer increases and the detection data is saved.

[0014] Preferably: the voltages of the plurality of electrostatic generators are adjusted to a target voltage according to the size of the space to be enriched, and the plurality of electrostatic generators are controlled to be powered on at the target voltage.

[0015] Preferably: the collection power source is controlled to start, and the output voltages of a plurality of the electrostatic generators are controlled to decrease smoothly until the output voltage drops to zero.

[0016] Preferably, one end of the enclosure of the detector module facing the top of the air inlet includes a conical structure.

[0017] Preferably: a normal pressure measuring chamber is provided in the detection cavity, the detector module is located in the normal pressure measuring chamber, and a rounded corner structure is provided on the inner side of the end of the normal pressure measuring chamber opposite to the filter paper assembly.

[0018] Preferably: the sampling port has a wide-mouth structure.

[0019] Preferably: the filter paper assembly includes filter paper and a filter paper feeding mechanism, the filter paper feeding mechanism includes a driving wheel component, a driven wheel component, a filter paper guide wheel and a filter paper counting wheel; the filter paper crosses the filter paper guide wheel and the filter paper counting wheel and is connected to the driving wheel component and the driven wheel component respectively.

[0020] Preferably: the collection power source includes any one of a fan and an air pump. According to the specific embodiment provided by the present invention, the present invention discloses the following technical effects:

[0021] The embodiment of the present application provides an aerosol collection device based on electrostatic enrichment. Based on the easy ionization characteristics of aerosol particles carrying radiation, multiple sets of electrostatic generators are used to adsorb aerosol particles in the environment, thereby greatly increasing the aerosol density at the sampling port, and then a low-power fan can be used to complete aerosol sampling. Because the electrostatic adsorption device has been used to gather aerosol particles in the environment, the device's requirements for sampling flow are greatly reduced, thereby reducing the collection's dependence on high-power fans or air pumps, and greatly reducing the power consumption of the device.

[0022] At the same time, the two processes of the device are carried out independently, without affecting each other and the aerosol collection efficiency. By redesigning the aerosol collection process, the collection process is divided into two independent processes, eliminating the collection process's dependence on high-power fans.

[0023] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 is a schematic structural diagram of an aerosol collection device based on electrostatic enrichment provided in an embodiment of the present invention;

[0026] Figure 2 is a schematic diagram of the structure of the interior of the detection cavity provided by an embodiment of the present invention;

[0027] Figure 3 is a schematic structural diagram of a filter paper assembly provided by an embodiment of the present invention;

[0028] Figure 4 It is a schematic diagram of the electrostatic enrichment aerosol collection process provided by an embodiment of the present invention.

[0029] In the figure: detection chamber 1, normal pressure measurement chamber 101, chamfered structure 102, detector module 2, cone structure 201, filter paper assembly 3, filter paper 301, driving wheel component 302, driven wheel component 303, filter paper guide wheel 304, filter paper counting wheel 305, air outlet 4, sampling port 5, collection power source 6, electrostatic generator 7. DETAILED DESCRIPTION

[0030] The technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0031] See also Figure 1 , Figure 2 , Figure 3 , is an aerosol collection device based on electrostatic enrichment provided by an embodiment of the present invention, such as Figure 1 , Figure 2 , Figure 3 As shown, the device may include:

[0032] A detection chamber 1, wherein a detector module 2 and a filter paper assembly 3 are arranged in the detection chamber 1; the detection chamber 1 comprises an air inlet and an air outlet 4, wherein the air inlet is connected to a sampling port 5, and the air outlet 4 is connected to a collection power source 6;

[0033] A plurality of electrostatic generators 7, wherein the plurality of electrostatic generators 7 are arranged inside the sampling port 5;

[0034] The controller, the detector module 2, the collection power source 6 and the plurality of electrostatic generators 7 are all connected to the controller; the controller is used to perform the following operations:

[0035] Controlling the electrostatic generators 7 to be powered on, so that the electrostatic generators 7 form multiple sets of strong electric fields in the space, so that the aerosol particles carrying radiation are ionized in the electric field and gather near the electrostatic generators 7 under the action of the electric field to achieve the enrichment of the aerosol particles;

[0036] Furthermore, the voltages of the electrostatic generators 7 are adjusted to a target voltage according to the size of the space to be enriched, and the electrostatic generators 7 are controlled to be powered on at the target voltage.

[0037] After determining that the enrichment time reaches the preset time limit, the collection power source 6 is controlled to start, so as to collect the aerosol particles near the several electrostatic generators 7 through the filter paper assembly 3; further, the embodiment of the present application can provide control of the collection power source 6 to start, and control the output voltage of the several electrostatic generators 7 to decrease smoothly until the output voltage drops to zero.

[0038] The detector module 2 is controlled to detect the dosage of the aerosol particles on the filter paper assembly 3 until the dosage data no longer increases, and the detection data is saved.

[0039] In order to reduce the influence of the components inside the detection chamber 1 on the collection process, the embodiment of the present application may further provide that the end of the enclosure of the detector module 2 facing the top of the air inlet includes a conical structure 201.

[0040] Furthermore, a normal pressure measuring chamber 101 is provided in the detection cavity 1 , the detector module 2 is located in the normal pressure measuring chamber 101 , and a rounded corner structure 102 is provided on the inner side of the end of the normal pressure measuring chamber 101 opposite to the filter paper assembly 3 .

[0041] In order to provide an enrichment effect, the embodiment of the present application may provide that the sampling port 5 has a wide-mouth structure.

[0042] In order to facilitate the timely replacement of filter paper after a test, the embodiment of the present application can also provide that the filter paper assembly 3 includes filter paper 301 and a filter paper feeding mechanism, and the filter paper feeding mechanism includes a driving wheel component 302, a driven wheel component 303, a filter paper guide wheel 304 and a filter paper counting wheel 305; the filter paper 301 crosses the filter paper guide wheel 304 and the filter paper counting wheel 305 and is connected to the driving wheel component 302 and the driven wheel component 303 respectively.

[0043] Furthermore, the collection power source 6 includes any one of a fan and an air pump.

[0044] The aerosol collection device based on electrostatic enrichment provided in the embodiment of the present application, based on the easy ionization characteristics of aerosol particles carrying radiation, uses multiple sets of electrostatic generators 7 to adsorb aerosol particles in the environment, greatly increases the aerosol density at the sampling port, and then uses a low-power fan to complete aerosol sampling. Because the electrostatic adsorption device has been used to gather aerosol particles in the environment, the device's requirements for sampling flow are greatly reduced, thereby reducing the collection's dependence on high-power fans or air pumps, and greatly reducing the power consumption of the device.

[0045] At the same time, the two processes of the device are carried out independently, without affecting each other and the aerosol collection efficiency. By redesigning the aerosol collection process, the collection process is divided into two independent processes, eliminating the dependence on the high-power fan during the collection process.

[0046] In addition, the device can be installed at the air outlet of the monitored environment or on a moving object, relying on the ambient airflow or the airflow generated by movement to further reduce power consumption and improve efficiency.

[0047] The device provided in the embodiment of the present application divides the electrostatically enriched aerosol collection into two processes, such as Figure 4 shown.

[0048] S1: Aerosol enrichment process; S2: Aerosol collection process. The S1 process is to enrich the ambient aerosol, and the voltage of the electrostatic generator 7 can be adjusted according to the size of the space to be enriched. The S2 process is to collect and detect the enriched aerosol, which can be collected and detected by a collection power source 6 such as a fan or an air pump. The detection can be collected using conventional filter paper and detected by a corresponding radiation detector. After the detection is completed, the next enrichment process is triggered.

[0049] After the device is powered on, the S1 process is performed. During this process, only the electrostatic generator 7 can be powered on, and other components are in standby mode, waiting to trigger the set ionization time limit.

[0050] Multiple groups of strong electric fields are formed in the space through multiple groups of electrostatic generators 7. The aerosol particles are ionized in the electric fields and gathered near the electrostatic generators 7 under the action of the electric fields. The remaining dust that does not carry aerosol particles is not affected by the electrostatic generators 7 and performs normal disordered diffusion movement in the space.

[0051] After a period of time, the aerosol particles enriched near the electrostatic generator 7 reach a certain density. At the same time, the density of the aerosol particles is limited by the action distance of the electrostatic generator 7, and the increase rate decreases. At this time, the number of aerosol particles enriched around the electrostatic generator 7 depends on the action distance of the electrostatic generator 7 and the radiation dose in the space.

[0052] When the enrichment time triggers the set time limit, the aerosol collection device based on electrostatic enrichment is triggered, and the fan and other mechanisms in the device generate suction to collect aerosol particles near the electrostatic generator 7. In order to avoid the diffusion of aerosol after the electrostatic generator 7 is turned off, reducing its collection efficiency, and at the same time, to reduce the effect of the electrostatic generator 7 on the aerosol particles, the output voltage of the electrostatic generator 7 is slowly and smoothly reduced until the output voltage drops to zero.

[0053] Aerosol collection can be done by filtering with filter paper. Since the air flow enters the detection cavity through the air flow inlet pipeline, and the detector is also located below the pipeline, the detector and its fixing seat will cut the radioactive aerosol sample, affecting the detection efficiency. The device designs the top of the detector module 2 shell into a cone (bullet head) form, and also uses a rounded corner at the bottom of the gas cutting cavity, mainly to reduce local energy loss and prevent aerosol particles from adhering to the cavity, which causes a decrease in detection efficiency.

[0054] The radiation detection detector detects the dose of aerosol particles filtered on the filter paper until the metering data stops increasing, i.e., it is determined that the enriched aerosol particles have been filtered and collected, and the radiation detection data is saved, and the filter paper is automatically replaced by the motor. The filter paper feeding component is mainly composed of a driving wheel component 302, a driven wheel component 303, a filter paper guide wheel 304, and a filter paper counting wheel 305. It can realize filter paper feeding, filter paper replacement, paper break detection, filter paper tightness detection, and filter paper remaining amount detection.

[0055] After the detection is completed, the next aerosol enrichment process is triggered simultaneously.

[0056] In summary, the aerosol collection device based on electrostatic enrichment provided by the present application reduces the reliance on high-power fans by redesigning the aerosol collection process, greatly reduces the power consumption and weight of the device, and further reduces the cost of the device. During the collection process, enrichment and collection are divided into two independent processes, which reduces mutual influence and improves the aerosol collection efficiency.

[0057] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0058] It can be known from the description of the above implementation methods that those skilled in the art can clearly understand that the present application can be implemented by means of software plus a necessary general hardware platform. Based on such an understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product can be stored in a storage medium such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in the various embodiments of the present application or certain parts of the embodiments.

[0059] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can refer to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system or system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can refer to the partial description of the method embodiment. The system and system embodiments described above are merely schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without creative work.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. An aerosol collection device based on electrostatic enrichment, characterized in that: include: A detection chamber, wherein a detector module and a filter paper assembly are arranged in the detection chamber; the detection chamber comprises an air inlet and an air outlet, wherein the air inlet is connected to a sampling port, and the air outlet is connected to a collection power source; A plurality of electrostatic generators, wherein the electrostatic generators are arranged inside the sampling port; The detector module, the collection power source and the plurality of electrostatic generators are all connected to the controller; the controller is used to perform the following operations: Controlling the electrostatic generators to be powered on, so that the electrostatic generators form multiple sets of strong electric fields in the space, so that the aerosol particles carrying radiation are ionized in the electric fields and gather near the electrostatic generators under the action of the electric fields to achieve the enrichment of the aerosol particles; After determining that the enrichment time reaches a preset time limit, controlling the collection power source to start, so as to collect the aerosol particles near the electrostatic generator through the filter paper assembly; The detector module is controlled to detect the dosage of the aerosol particles on the filter paper assembly until the dosage data no longer increases, and the detection data is saved.

2. The aerosol collection device based on electrostatic enrichment according to claim 1, characterized in that: The voltages of the electrostatic generators are adjusted to a target voltage according to the size of the space to be enriched, and the electrostatic generators are controlled to be powered on at the target voltage.

3. The aerosol collection device based on electrostatic enrichment according to claim 1, characterized in that: The collection power source is controlled to start, and the output voltages of a plurality of the electrostatic generators are controlled to decrease smoothly until the output voltage drops to zero.

4. The aerosol collection device based on electrostatic enrichment according to claim 1, characterized in that: One end of the enclosure of the detector module facing the top of the air inlet includes a cone structure.

5. The aerosol collection device based on electrostatic enrichment according to claim 4, characterized in that: A normal pressure measuring chamber is arranged in the detection cavity, the detector module is located in the normal pressure measuring chamber, and a rounded corner structure is arranged on the inner side of the end of the normal pressure measuring chamber opposite to the filter paper assembly.

6. The aerosol collection device based on electrostatic enrichment according to claim 1, characterized in that: The sampling port has a wide-mouth structure.

7. The aerosol collection device based on electrostatic enrichment according to claim 1, characterized in that: The filter paper assembly includes filter paper and a filter paper feeding mechanism, and the filter paper feeding mechanism includes a driving wheel component, a driven wheel component, a filter paper guide wheel and a filter paper counting wheel; the filter paper crosses the filter paper guide wheel and the filter paper counting wheel and is connected to the driving wheel component and the driven wheel component respectively.

8. The aerosol collection device based on electrostatic enrichment according to claim 1, characterized in that: The collection power source includes any one of a fan and an air pump.

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