An aerosol collection device based on electrostatic enrichment

Abstract

This invention discloses an aerosol collection device based on electrostatic enrichment, belonging to the field of radiation measurement equipment technology. Based on the easily ionized characteristic of radiation-carrying aerosol particles, multiple sets of electrostatic generators are used to adsorb aerosol particles in the environment, greatly increasing the aerosol density at the sampling port. A low-power fan is then sufficient for aerosol sampling. Because the electrostatic adsorption device gathers aerosol particles in the environment, the sampling flow rate requirement is greatly reduced, thereby reducing reliance on high-power fans or air pumps and significantly reducing equipment power consumption. Furthermore, the two processes within the device operate independently and do not interfere with each other, thus not affecting the aerosol collection efficiency. By redesigning the aerosol collection process and dividing it into two independent processes, the dependence on high-power fans for collection is eliminated.

Description

Technical Field

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

[0002] Aerosols are multiphase dispersion systems formed by solid or liquid particles carried by the atmosphere, with particle sizes typically ranging from 0.01 micrometers to tens of micrometers. Dispersion systems containing a radioactive dispersed phase are called radioactive aerosols. Radioactive aerosol monitoring refers to obtaining the activity concentration of radioactive aerosols emitted into the environment through methods such as simultaneous or delayed measurements.

[0003] Patent document CN118687937A discloses a high-flow-rate radioactive aerosol sampling device, comprising: a fan for drawing air from the environment into an air inlet chamber; the air inlet chamber for receiving the incoming air and distributing it to various working channels of a collection chamber; the collection chamber including multiple working channels, wherein, under the action of an input voltage, the activated working channels are used to ionize aerosol particles in the incoming air, and the generated electric field is used to collect the ionized aerosol particles by electrostatic adsorption, and the remaining air is discharged to an air outlet chamber; the air outlet chamber is used to collect the air output from all working channels and discharge it after concentration; and a high-voltage power supply is used to provide input voltage to the collection chamber. Unlike the most common existing radioactive aerosol sampling methods that rely on high-power fans and filter paper filtration, this invention achieves 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 aerosol sampling devices. However, the core method remains unchanged. It still involves collecting a large amount of gas using a fan. At the same time, the fan is used for air intake. The airflow generated by the fan causes non-radioactive particles in the air to collide with radiative particles that are moving vertically due to the influence of the electric field, which greatly affects the collection efficiency of radiative particles. Summary of the Invention

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

[0006] This invention provides the following solution:

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

[0008] The detection chamber contains a detector module and a filter paper assembly; the detection chamber includes an air inlet and an air outlet, the air inlet is connected to a sampling port, and the air outlet is connected to a power source for collection.

[0009] A plurality of electrostatic generators are disposed inside the sampling port;

[0010] The controller is connected to the detector module, the power source for collecting electricity, and several electrostatic generators; the controller is used to perform the following operations:

[0011] The electrostatic generators are powered on to form multiple sets of strong electric fields in 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] Once the enrichment time reaches a preset time limit, the collection power source is activated to collect aerosol particles near several electrostatic generators through the filter paper assembly.

[0013] The detector module is controlled to detect the dose of aerosol particles on the filter paper assembly until the dose data no longer increases, at which point the detection data is saved.

[0014] Preferably: The voltage of several electrostatic generators is adjusted to the target voltage according to the required enrichment space size, and the several electrostatic generators are controlled to be powered on at the target voltage.

[0015] Preferably: the power source for collecting electricity is started, and the output voltage of several electrostatic generators is gradually reduced until the output voltage drops to zero.

[0016] Preferably, the end of the detector module's casing facing the top of the air inlet includes a conical structure.

[0017] Preferably, the detection chamber is provided with an atmospheric pressure measuring chamber, the detector module is located in the atmospheric pressure measuring chamber, and the inner side of the atmospheric pressure measuring chamber opposite to the filter paper assembly is provided with a rounded corner structure.

[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 including a driving wheel component, a driven wheel component, a filter paper guide wheel, and a filter paper counting wheel; the filter paper passes over 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 power source for collection includes any one of a fan and an air pump. According to specific embodiments provided by the present invention, the following technical effects are disclosed:

[0021] This application provides an electrostatic enrichment-based aerosol sampling device. Based on the easily ionized nature of radiation-carrying aerosol particles, multiple sets of electrostatic generators adsorb aerosol particles from the environment, significantly increasing the aerosol density at the sampling port. A low-power fan is then sufficient for aerosol sampling. Because electrostatic adsorption is used to gather aerosol particles from the environment, the device's sampling flow rate requirement is greatly reduced, thereby reducing reliance on high-power fans or air pumps and significantly decreasing equipment power consumption.

[0022] Meanwhile, the two processes in the device operate independently and do not affect each other, thus not impacting the aerosol collection efficiency. By redesigning the aerosol collection process and dividing it into two independent steps, the reliance on high-power fans for collection is eliminated.

[0023] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

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

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

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

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

[0029] In the diagram: Detection chamber 1, atmospheric pressure measurement chamber 101, rounded corner structure 102, detector module 2, conical 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 Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0031] See Figure 1 , Figure 2 , Figure 3 This invention provides an aerosol collection device based on electrostatic enrichment, such as... Figure 1 , Figure 2 , Figure 3 As shown, the device may include:

[0032] The detection chamber 1 is equipped with a detector module 2 and a filter paper assembly 3; the detection chamber 1 includes an air inlet and an air outlet 4, 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 are disposed inside the sampling port 5;

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

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

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

[0037] Once the enrichment time reaches a preset time limit, the collection power source 6 is activated to collect aerosol particles near the electrostatic generators 7 via the filter paper assembly 3. Furthermore, embodiments of this application may provide control over the activation of the collection power source 6 and control the output voltage of the electrostatic generators 7 to gradually decrease until the output voltage drops to zero.

[0038] The detector module 2 is controlled to detect the dose of the aerosol particles on the filter paper assembly 3 until the dose 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 acquisition process, this embodiment of the application may also provide that the end of the casing of the detector module 2 facing the top of the air inlet includes a conical structure 201.

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

[0041] To provide enrichment, embodiments of this application may provide that the sampling port 5 has a wide-mouth structure.

[0042] To facilitate timely replacement of the filter paper after a test, this embodiment of the application may also provide that the filter paper assembly 3 includes filter paper 301 and a filter paper feeding mechanism. 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 passes over 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 power source 6 for collecting power includes any one of a fan or an air pump.

[0044] The electrostatic enrichment-based aerosol sampling device provided in this application utilizes the easily ionized nature of radiation-carrying aerosol particles. By using multiple sets of electrostatic generators 7 to adsorb aerosol particles in the environment, the aerosol density at the sampling port is greatly increased. A low-power fan is then sufficient to complete aerosol sampling. Because the electrostatic adsorption device gathers aerosol particles in the environment, the sampling flow rate requirement is greatly reduced, thereby reducing reliance on high-power fans or air pumps and significantly decreasing equipment power consumption.

[0045] Meanwhile, the two processes in the device operate independently and do not affect each other, thus not impacting the aerosol collection efficiency. By redesigning the aerosol collection process and dividing it into two independent steps, the dependence on the power of the fan used in the collection process is eliminated.

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

[0047] The device provided in this application embodiment divides the electrostatic enrichment aerosol collection into two processes, such as... Figure 4 As shown.

[0048] S1: Aerosol enrichment process; S2: Aerosol collection process. Process S1 enriches ambient aerosols; the voltage of the electrostatic generator 7 can be adjusted according to the size of the space requiring enrichment. Process S2 collects and detects the enriched aerosols; collection and detection can be performed using a power source 6 such as a fan or air pump. Detection can be done using conventional filter paper and a corresponding radiation detector. The next enrichment process is triggered after the detection is completed.

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

[0050] Multiple sets of electrostatic generators 7 form multiple strong electric fields in the space, causing aerosol particles to ionize in the electric fields and gather near the electrostatic generators 7 under the influence of the electric fields. The remaining dust particles that do not carry aerosol particles are not affected by the electrostatic generators 7 and carry out normal disordered diffusion 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 aerosol particles is limited by the operating distance of the electrostatic generator 7, and the rate of increase decreases. At this time, the number of aerosol particles enriched around the electrostatic generator 7 depends on the operating distance of the electrostatic generator 7 and the radiation dose in the space.

[0052] When the enrichment time reaches the set time limit, the electrostatic enrichment-based aerosol collection device is activated. The device's internal mechanisms, such as fans, generate suction to collect aerosol particles near the electrostatic generator 7. To prevent aerosol diffusion from reducing collection efficiency after the electrostatic generator 7 is turned off, and to minimize the effect of the electrostatic generator 7 on the aerosol particles, the output voltage of the electrostatic generator 7 is slowly and gradually reduced until it reaches zero.

[0053] Aerosols can be collected by filtering with filter paper. Since the airflow enters the detection chamber through the airflow inlet pipe and the detector is located below the pipe, the detector and its mounting base will cut the radioactive aerosol sample, affecting the detection efficiency. The device adopts a cone (bullet head) shape for the top of the detector module 2 shell and a rounded corner shape for the lower part of the gas cutting chamber. This is mainly to reduce local energy loss and prevent aerosol particles from adhering to the chamber, thus reducing the detection efficiency.

[0054] The radiation detector measures the dose of aerosol particles filtered through the filter paper. Once the measurement data stops increasing, it is determined that the enriched aerosol particles have been filtered and collected, and the radiation detection data is saved. Simultaneously, a motor automatically replaces the filter paper. The filter paper feeding mechanism mainly consists of a drive wheel component 302, a driven wheel component 303, a filter paper guide wheel 304, and a filter paper counting wheel 305. It can perform filter paper feeding, filter paper replacement, paper breakage detection, filter paper tightness detection, and filter paper remaining quantity detection.

[0055] The next aerosol enrichment process is triggered simultaneously after the detection is completed.

[0056] In summary, the electrostatic enrichment-based aerosol collection device provided in this application, by redesigning the aerosol collection process, reduces reliance on high-power fans, significantly reduces device power consumption and weight, and further reduces device cost. The enrichment and collection processes are separated into two independent processes, reducing mutual interference and improving aerosol collection efficiency.

[0057] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0058] As can be seen from the above description of the embodiments, those skilled in the art can clearly understand that this application can be implemented by means of software plus necessary general-purpose hardware platforms. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in various embodiments or some parts of the embodiments of this application.

[0059] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, for system or system embodiments, since they are basically similar to method embodiments, the description is relatively simple, and relevant parts can be referred to the descriptions in the method embodiments. The systems and system embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without creative effort.

[0060] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of protection of the present invention.

Claims

1. An aerosol collection device based on electrostatic enrichment, characterized in that, include: The detection chamber contains a detector module and a filter paper assembly; the detection chamber includes an air inlet and an air outlet, the air inlet is connected to a sampling port, and the air outlet is connected to a power source for collection. A plurality of electrostatic generators are disposed inside the sampling port; The controller is connected to the detector module, the power source for collecting electricity, and several electrostatic generators; the controller is used to perform the following operations: The electrostatic generators are powered on to form multiple sets of strong electric fields in 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. Adjust the voltage of several electrostatic generators to the target voltage according to the required enriched space size, and control several electrostatic generators to be powered on at the target voltage; Once the enrichment time reaches a preset time limit, the collection power source is activated to collect aerosol particles near several electrostatic generators through the filter paper assembly. The detector module is controlled to detect the dose of the aerosol particles on the filter paper assembly until the dose 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 power source for collecting electricity is started, and the output voltage of several electrostatic generators is gradually reduced until the output voltage drops to zero.

3. The aerosol collection device based on electrostatic enrichment according to claim 1, characterized in that, The casing of the detector module has a conical structure at one end facing the top of the air inlet.

4. The aerosol collection device based on electrostatic enrichment according to claim 3, characterized in that, The detection chamber is equipped with an atmospheric pressure measurement chamber, and the detector module is located in the atmospheric pressure measurement chamber. The inner side of the atmospheric pressure measurement chamber opposite to the filter paper assembly is provided with a rounded corner structure.

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

6. 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. 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 passes over 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.

7. The aerosol collection device based on electrostatic enrichment according to claim 1, characterized in that, The power source for collection includes either a fan or an air pump.

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