Quantitative charge and discharge system for pollutant particles

Abstract

The utility model provides a quantitative charge and discharge system for pollutant particles, which relates to the technical field of environmental research equipment and is characterized in that a power supply device is respectively connected with a particle charge charging device and a particle charge discharging device and is used for power supply and charge and discharge conversion; a Hall element of the particle charge charging device is arranged between two magnetic coils, and the front surface and the rear surface of the Hall element are connected with the two magnetic coils respectively so that current can be generated in the Hall element. The upper surface and the lower surface of the Hall element are respectively connected with the positive and negative charge insulating plates and are used for charging pollutant particles on the positive charge insulating plate and the negative charge insulating plate; the particle charge discharging device is used for discharging pollutant particles on the positive charge insulating plate and the negative charge insulating plate; the charge measuring device is connected with pollutant particles on the positive charge insulating plate and the negative charge insulating plate and used for monitoring the charge quantity of the particles. According to the scheme, quantitative energy charging of pollutant particles can be achieved, and therefore the accuracy of pollutant particle experimental research is improved.

Description

Technical Field

[0001] This utility model relates to the field of environmental research equipment technology, and in particular to a quantitative charging and discharging system for pollutant particles. Background Technology

[0002] Practical research has revealed that particles such as sandstorms, haze, and industrial dust are often charged. Therefore, studying the various properties of pollutant particles in their charged state is of great significance for the study of environmental pollutants. For example, the initial charge of a particle is a crucial factor affecting the charge quantity in the study of particle collision and contact charging, and it is also an indispensable factor in the study of the charge on particles within a particle system. Therefore, it is necessary to frequently charge and discharge pollutant particles in research to meet experimental research conditions.

[0003] Particle charging and discharging refers to the process of increasing or decreasing the amount of electric charge carried by a particle. The final amount of charge a particle carries after this process is its total electric charge. In practice, particles are charged before collisions, and the amount of charge is measured after the collision. By measuring the changes in particle charge, particle motion can be analyzed and applied to pollution control and prevention. For example, in dust storms and haze events, knowing the initial charge of dust or haze particles allows us to understand the changes in charge after the collision, thus enabling effective control measures. In industrial fluidized beds, the initial charge of particles can be used to accelerate or slow down particle aggregation. Furthermore, in industrial airborne dust incidents, discharging dust particles can prevent the risk of explosion.

[0004] However, in practice, it is difficult to quantitatively charge pollutant particles when charging and discharging them, which often results in experiments failing to achieve the desired effect. Utility Model Content

[0005] In view of this, and to address the above shortcomings, it is necessary to propose a quantitative charge-discharge system for pollutant particles to achieve quantitative energy charging of pollutant particles, thereby improving the accuracy of experimental research on pollutant particles.

[0006] This invention provides a quantitative charging and discharging system for pollutant particles, the system comprising: a power supply device, a particle charge charging device, a particle charge discharging device, and a charge measuring device;

[0007] The power supply device is connected to the particle charge charging device and the particle charge discharging device respectively, and is used to supply power to the particle charge charging device and the particle charge discharging device, and to perform charge and discharge conversion.

[0008] The particle charge charging device includes a Hall element, a magnetic coil, a positive charge insulating plate, and a negative charge insulating plate; the Hall element is disposed between two magnetic coils, and the front and rear surfaces of the Hall element are respectively connected to the two magnetic coils to generate current in the Hall element; the upper and lower surfaces of the Hall element are respectively connected to the positive charge insulating plate and the negative charge insulating plate to charge the pollutant particles disposed on the positive charge insulating plate and the negative charge insulating plate.

[0009] The particle charge discharge device is used to release the charge carried by pollutant particles on the positively charged insulating plate and the negatively charged insulating plate;

[0010] The charge measuring device is connected to the pollutant particles on the positively charged insulating plate and the negatively charged insulating plate respectively, and is used to monitor the charge of the pollutant particles in real time.

[0011] Preferably, the power supply device includes: a switching module, a voltage conversion module, and a power connection module;

[0012] The switch module is used to turn the power supply on or off;

[0013] The voltage conversion module is used to adjust the voltage value during charging;

[0014] The power connection module is used to switch between charging and discharging modes for pollutant particles.

[0015] Preferably, the voltage conversion module is a digital voltage regulator integrated on the power supply panel, supporting step adjustment or continuous adjustment.

[0016] Preferably, the particle charge charging device further includes a fixed base plate with two supports spaced apart on the fixed base plate. The Hall element is fixedly installed on the two supports, and there is a gap between the bottom surface of the Hall element and the fixed base plate. The negative charge insulating plate is connected to the lower surface of the Hall element after passing through the gap with a wire.

[0017] Preferably, the Hall element is a gallium arsenide-based Hall element, with copper wires welded to its upper and lower surfaces for connection to the conductive layers of the positively charged insulating plate and the negatively charged insulating plate, respectively.

[0018] Preferably, both the positive charge insulating plate and the negative charge insulating plate include: an insulating plate substrate, on which at least one groove for placing pollutant particles is provided, and the upper surface of the insulating plate substrate and the inside of the groove are coated with a conductive layer by magnetron sputtering, and the Hall element and the charge measuring device are electrically connected to the conductive layer.

[0019] Preferably, the insulating board substrate has several grooves with different hole diameters.

[0020] Preferably, the insulating board substrate is made of polytetrafluoroethylene and has a thickness of 5 mm.

[0021] Preferably, the particulate charge discharge device includes two deionizers, which are respectively positioned above the positively charged insulating plate and the negatively charged insulating plate, with their outlets facing the upper surfaces of the positively charged insulating plate and the negatively charged insulating plate. The deionizers are used to neutralize the residual charge of the pollutant particles on the positively charged insulating plate and the negatively charged insulating plate by generating an ionized airflow, thereby achieving discharge.

[0022] Preferably, the charge measuring device is a charge measuring instrument.

[0023] As can be seen from the above technical solution, the quantitative charging and discharging system for pollutant particles provided in this embodiment of the present invention includes a power supply device, a particle charge charging device, a particle charge discharging device, and a charge measuring device. The power supply device is connected to the particle charge charging device and the particle charge discharging device respectively, and can supply power to the particle charge charging device and the particle charge discharging device and perform charge-discharge conversion. The particle charge charging device includes a Hall element, a magnetic coil, a positive charge insulating plate, and a negative charge insulating plate. The Hall element is disposed between two magnetic coils, and the front and rear surfaces of the Hall element are respectively connected to the two magnetic coils, thereby generating current in the Hall element. The upper and lower surfaces of the Hall element are respectively connected to the positive charge insulating plate and the negative charge insulating plate, and can charge the pollutant particles disposed on the positive charge insulating plate and the negative charge insulating plate. The particle charge discharging device can release the charge carried by the pollutant particles on the positive charge insulating plate and the negative charge insulating plate, and the charge measuring device is connected to the pollutant particles on the positive charge insulating plate and the negative charge insulating plate respectively, and can realize real-time monitoring of the charge of the pollutant particles. Therefore, this scheme can realize the charging and discharging of pollutant particles through the particle charge charging device and particle charge discharging device. Moreover, the charge measurement device can monitor the charge of pollutant particles in real time during the charging and discharging process, thereby realizing the quantitative charging of pollutant particles. The quantitatively charged pollutant particles can then be used for experimental research, which can improve the accuracy of experimental research. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of a quantitative charge-discharge system for pollutant particles provided in an embodiment of the present invention.

[0025] Figure 2 This is a schematic diagram of a power supply device provided in an embodiment of the present utility model.

[0026] Figure 3 This is a schematic diagram of a particle charge charging device provided in an embodiment of the present invention.

[0027] Figure 4This is a schematic diagram of a particle charge discharge device provided in an embodiment of the present invention.

[0028] In the figure: power supply device 10, switch module 11, voltage conversion module 12, power connection module 13, particle charge charging device 20, Hall element 21, magnetic coil 22, positive charge insulating plate 23, negative charge insulating plate 24, fixed base plate 25, bracket 26, groove 27, particle charge discharge device 30, deionizing fan 31, charge measuring device 40. Detailed Implementation

[0029] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0030] See Figure 1-4 This utility model provides a quantitative charging and discharging system for pollutant particles, which includes: a power supply device 10, a particle charge charging device 20, a particle charge discharging device 30, and a charge measuring device 40.

[0031] The power supply device 10 is connected to the particle charge charging device 20 and the particle charge discharging device 30 respectively, and is used to supply power to the particle charge charging device 20 and the particle charge discharging device 30, and to perform charge and discharge conversion.

[0032] The particle charge charging device 20 includes a Hall element 21, a magnetic coil 22, a positive charge insulating plate 23, and a negative charge insulating plate 24. The Hall element 21 is disposed between the two magnetic coils 22, and the front and rear surfaces of the Hall element 21 are respectively connected to the two magnetic coils 22 to generate current in the Hall element 21. The upper and lower surfaces of the Hall element 21 are respectively connected to the positive charge insulating plate 23 and the negative charge insulating plate 24 to charge the pollutant particles disposed on the positive charge insulating plate 23 and the negative charge insulating plate 24.

[0033] The particle charge discharge device 30 is used to release the charge carried by the pollutant particles on the positively charged insulating plate 23 and the negatively charged insulating plate 24.

[0034] The charge measuring device 40 is connected to the pollutant particles on the positively charged insulating plate 23 and the negatively charged insulating plate 24 respectively, and is used to monitor the charge of the pollutant particles in real time.

[0035] In this embodiment, the particle charge charging device 20 and the particle charge discharging device 30 can realize the charging and discharging of pollutant particles. Moreover, the charge measurement device 40 can monitor the charge of pollutant particles in real time during the charging and discharging process, thereby realizing the quantitative charging of pollutant particles. The quantitatively charged pollutant particles can then be used for experimental research, which can improve the accuracy of experimental research.

[0036] The power supply device 10 is mainly used to supply power to the particle charge charging device 20 and the particle charge discharging device 30. Specifically, the power supply device 10 may include a switching module 11, a voltage conversion module 12, and a power connection module 13;

[0037] The switch module 11 is used to turn the power supply on or off;

[0038] The voltage conversion module 12 is used to adjust the voltage value during charging;

[0039] The power connection module 13 is used to switch between charging and discharging modes for pollutant particles.

[0040] In this embodiment, the power supply device 10 can be a DC high-voltage source with an output range of 0-500V, an accuracy of ±0.5%, and a ripple factor ≤1%. A switch module 11 is provided on it for turning the power supply on or off. The voltage conversion module 12 can be a digital voltage regulator integrated on the panel of the power supply device 10, supporting step adjustment or continuous adjustment modes. The power connection module 13 can be a power connector used to switch the charging and discharging modes of pollutant particles, that is, to switch to the mode of powering the particle charge charging device 20 or the mode of powering the particle charge discharging device 30.

[0041] In addition, the power supply unit 10 may also include an overload protection circuit for real-time monitoring of current fluctuations, automatically cutting off the output when the current exceeds a threshold, such as when it exceeds 10mA. The power supply unit 10 may also be equipped with status indicator lights to display the real-time values ​​of power supply start / stop, overload, and output voltage.

[0042] The particle charge charging device 20 includes a Hall element 21, magnetic coils 22, a positively charged insulating plate 23, and a negatively charged insulating plate 24. The Hall element 21 is positioned between the two magnetic coils 22, with its front and rear surfaces connected to the two coils respectively to generate current. The upper and lower surfaces of the Hall element 21 are connected to the positively charged insulating plate 23 and the negatively charged insulating plate 24 respectively, enabling the charging of contaminant particles disposed on the insulating plates 23 and 24. The particle charge charging device 20 also includes a fixed base plate 25 with two spaced supports 26. The Hall element 21 is fixedly mounted on the two supports 26, with a gap between the bottom surface of the Hall element 21 and the fixed base plate 25. The negatively charged insulating plate 24 is connected to the lower surface of the Hall element 21 via a wire passing through the gap. This facilitates the drawing of wires from the upper and lower surfaces of the Hall element 21, thereby achieving the purpose of collecting charge.

[0043] In this embodiment, magnetic coils 22 are fixed directly above and below Hall element 21, respectively. Powered by power supply device 10, they generate a magnetic field. Wires are led out from magnetic coils 22 and connected to the front and rear surfaces of Hall element 21, generating current in Hall element 21. The current generated by the connection between the front and rear surfaces of Hall element 21 and the wires on magnetic coils 22 causes charges to form on the upper and lower surfaces of Hall element 21 under the influence of the magnetic field. Hall element 21 is fixed to an insulating base plate 25 with two supports 26, facilitating the collection of charges by leading wires from the upper and lower surfaces. Positive charge insulating plate 23 and negative charge insulating plate 24 are fixed to both sides of Hall element 21, respectively, and connected to the upper and lower surfaces of Hall element 21 by wires to collect charges. Charge measuring device 40, connected to charge monitoring probes on positive charge insulating plate 23 and negative charge insulating plate 24, can observe the charge quantity in real time.

[0044] Specifically, the magnetic coils 22 can use neodymium iron boron permanent magnets with a magnetic induction intensity of 0.5-2 T, and the spacing can be adjusted by precision guide rails (range 5-50 mm). The surface of the magnetic coils 22 is covered with a copper shielding layer to reduce magnetic field leakage. The Hall element 21 is a gallium arsenide-based Hall element 21 with a sensitivity of 300 mV / mT and a linearity error ≤0.1%. The Hall element 21 is fixed at the geometric center of the two magnetic coils 22, and copper wires are welded to its upper and lower surfaces, respectively, connecting to the conductive layers of the positive charge insulating plate 23 and the negative charge insulating plate 24. Both the positive charge insulating plate 23 and the negative charge insulating plate 24 include a polytetrafluoroethylene (PTFE) insulating substrate with a thickness of 5 mm. At least one groove 27 for placing contaminant particles is provided on the insulating substrate. The upper surface of the insulating substrate and the inside of the groove 27 are coated with a nanoscale gold film by magnetron sputtering to form a conductive layer with a resistivity <1×10⁻⁶. -8The Hall element 21 and the charge measuring device 40 are both electrically connected to the conductive layer, thereby enabling charge collection and real-time feedback of the surface charge. A charge monitoring probe connected to the conductive layer can be embedded in the insulating substrate; this probe is connected to a charge measuring instrument to provide real-time feedback of the surface charge density.

[0045] The charging principle is as follows: When the power supply device 10 outputs voltage, current flows through the magnetic coil 22, generating a uniform magnetic field (magnetic field strength B∝I). The Hall element 21 generates a transverse potential difference (V) in the magnetic field. H =K H *I*B,K H (where E is the Hall coefficient) This potential difference is transmitted to the insulating plate through the wire, forming a uniform electric field perpendicular to the direction of particle motion (E=V). H / d, where d is the spacing between the insulating plates). When a particle passes through the electric field region, it gains a fixed amount of charge under the influence of the electric field force (Q=C*E, where C is the equivalent capacitance of the particle).

[0046] In one embodiment, several grooves 27 with different apertures are provided on the insulating board substrate to accommodate pollutant particles of different sizes. This allows for the charging and discharging of pollutant particles of different sizes, which can then be used for experimental research on the influencing factor of different pollutant particle sizes.

[0047] The particulate charge discharge device 30 may include two deionizers 31, which are respectively positioned above the positive charge insulating plate 23 and the negative charge insulating plate 24, with their outlets facing the upper surfaces of the positive charge insulating plate 23 and the negative charge insulating plate 24. The devices are used to generate an ionized airflow to neutralize the residual charge of pollutant particles on the positive charge insulating plate 23 and the negative charge insulating plate 24, thereby achieving discharge.

[0048] In this embodiment, the deionizing fan 31 adopts a symmetrical arrangement of two fans and uses high-frequency ionization technology with an ionization voltage of 5 kV to generate a deionized gas flow, wherein the ion concentration is ≥1×10⁻⁶. 6 ions / cm³; airflow rate is adjustable from 0.5 to 5 m / s, and stability is maintained by a PID controller.

[0049] The discharge principle is as follows: after the deion fan 31 is started, high-energy electrons collide with water molecules in the air to produce H3O. + With OH - Ions. These ions are transported to the surface of the insulating board by airflow and undergo a neutralization reaction with the residual charge (such as Q). + +OH - →H2O). The charge meter probe detects the surface potential in real time, and when the potential drops to within ±1 V, the discharge is considered complete.

[0050] When conducting experiments based on the system provided by this utility model, the following process can be followed:

[0051] 1) Connect the power connector to the circuit of the discharge system and adjust the voltage converter to the required voltage value. Turn on the power to make the deion fan 31 work and reduce the charge on the surface of the granules to zero.

[0052] 2) Connect the power connector to the charging system circuit and adjust the voltage converter to the required voltage value. Turn on the power to start the charging system and charge the pellets. Observe the reading on the charge measuring instrument to determine the amount of charge.

[0053] 3) After the particle charging experiment is completed, turn on the deion fan 31 to clean the charge insulation plate and the surface of the particle before the next experiment can be carried out.

[0054] As can be seen from the above embodiments, the quantitative charge-discharge system for pollutant particles provided by this solution can quantitatively charge pollutant particles and remove surface charge from the particles, making the surface charge of the particles zero. When charging the particles, it can more accurately and quantitatively adsorb charges, thereby providing conditions for experiments on the charge properties of particle collisions.

[0055] The modules or units in the device of this utility model embodiment can be merged, divided, and deleted according to actual needs. The above-disclosed embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of this utility model. Those skilled in the art can understand that implementing all or part of the processes of the above embodiments and making equivalent changes according to the claims of this utility model still fall within the scope of this utility model.

Claims

1. A quantitative charge-discharge system for pollutant particles, characterized in that, The system includes: a power supply unit, a particle charge charging unit, a particle charge discharging unit, and a charge measuring unit; The power supply device is connected to the particle charge charging device and the particle charge discharging device respectively, and is used to supply power to the particle charge charging device and the particle charge discharging device, and to perform charge and discharge conversion. The particle charge charging device includes a Hall element, a magnetic coil, a positive charge insulating plate, and a negative charge insulating plate; the Hall element is disposed between two magnetic coils, and the front and rear surfaces of the Hall element are respectively connected to the two magnetic coils to generate current in the Hall element; the upper and lower surfaces of the Hall element are respectively connected to the positive charge insulating plate and the negative charge insulating plate to charge the pollutant particles disposed on the positive charge insulating plate and the negative charge insulating plate. The particle charge discharge device is used to release the charge carried by pollutant particles on the positively charged insulating plate and the negatively charged insulating plate; The charge measuring device is connected to the pollutant particles on the positively charged insulating plate and the negatively charged insulating plate respectively, and is used to monitor the charge of the pollutant particles in real time.

2. The quantitative charge-discharge system for pollutant particles according to claim 1, characterized in that, The power supply device includes: a switching module, a voltage conversion module, and a power connection module; The switch module is used to turn the power supply on or off; The voltage conversion module is used to adjust the voltage value during charging; The power connection module is used to switch between charging and discharging modes for pollutant particles.

3. The quantitative charge-discharge system for pollutant particles according to claim 2, characterized in that, The voltage conversion module is a digital voltage regulator integrated on the power supply panel, supporting step adjustment or continuous adjustment.

4. The quantitative charge-discharge system for pollutant particles according to claim 1, characterized in that, The particle charge charging device also includes a fixed base plate with two supports spaced apart on the fixed base plate. The Hall element is fixedly installed on the two supports, and there is a gap between the bottom surface of the Hall element and the fixed base plate. The negative charge insulating plate is connected to the lower surface of the Hall element after passing through the gap with a wire.

5. The quantitative charge-discharge system for pollutant particles according to claim 4, characterized in that, The Hall element is a gallium arsenide-based Hall element, with copper wires welded to its upper and lower surfaces, respectively, for connecting to the conductive layers of the positively charged insulating plate and the negatively charged insulating plate.

6. The quantitative charge-discharge system for pollutant particles according to claim 4, characterized in that, Both the positive charge insulating plate and the negative charge insulating plate include: an insulating plate substrate, on which at least one groove for placing pollutant particles is provided, and a conductive layer is deposited on the upper surface of the insulating plate substrate and inside the groove by magnetron sputtering, and the Hall element and the charge measuring device are electrically connected to the conductive layer.

7. The quantitative charge-discharge system for pollutant particles according to claim 6, characterized in that, The insulating board substrate has several grooves with different hole diameters.

8. The quantitative charge-discharge system for pollutant particles according to claim 6, characterized in that, The insulating board substrate is made of polytetrafluoroethylene and has a thickness of 5 mm.

9. The quantitative charge-discharge system for pollutant particles according to claim 1, characterized in that, The particle charge discharge device includes two deionizers, which are respectively positioned above the positive and negative charge insulating plates, with their outlets facing the upper surfaces of the positive and negative charge insulating plates. The deionizers are used to generate an ionized airflow to neutralize the residual charge of pollutant particles on the positive and negative charge insulating plates, thereby achieving discharge.

10. The quantitative charge-discharge system for pollutant particles according to claim 1, characterized in that, The charge measuring device is a charge measuring instrument.

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