Experimental device for processing grain by atmospheric pressure dielectric barrier discharge plasma

Abstract

An experimental device for processing grain through atmospheric pressure dielectric barrier discharge plasma comprises a box body, a plasma generating mechanism and a supporting mechanism are arranged in the box body, the plasma generating mechanism comprises a supporting plate, and a plasma generating assembly is placed on the supporting plate; a containing space used for containing grain samples is formed between the supporting plate and the bottom wall of the box body, screws are connected to the edge of the supporting plate, the supporting mechanism comprises a plurality of mounting frames fixedly arranged on the bottom wall of the box body, each mounting frame comprises a first vertical plate, and a first sliding way extending up and down is formed in each first vertical plate; the screw penetrates through the first sliding way, and the head of the screw can be matched with the supporting plate to clamp the first vertical plate so as to fix the position of the supporting plate. When the processing distance needs to be adjusted in an experiment, the screw is unscrewed, so that the supporting plate can slide along the first vertical plate, the screw is tightened after the supporting plate slides to a proper position, the position of the supporting plate is further fixed, at the moment, the processing distance is changed, and the experiment operation steps are simple.

Description

Technical Field

[0001] This utility model relates to the field of experimental technology of atmospheric pressure dielectric barrier discharge plasma for grain treatment, specifically an experimental device for treating grain with atmospheric pressure dielectric barrier discharge plasma. Background Technology

[0002] The detection rate of mycotoxins is high when grains are stored for a long time, with aflatoxin being particularly typical. Aflatoxin is heat-resistant and requires a high temperature of 280℃ to decompose; it is difficult to destroy it at conventional cooking and processing temperatures.

[0003] Cold plasma technology, as an emerging food sterilization technology, effectively inhibits microbial growth and degrades chemical pesticides by generating active substances such as electrons, ions, and free radicals in the surrounding medium. This technology achieves toxin degradation through chemical reactions between active particles and fungal toxins, disrupting their chemical structure. While jet plasma is primarily used for treating small-area localized contamination, its processing efficiency is relatively low. Atmospheric pressure dielectric barrier discharge plasma, on the other hand, can treat large-area contamination in relatively enclosed spaces. By adjusting the parameters of atmospheric pressure dielectric barrier discharge plasma, the degradation efficiency of fungal toxins can be significantly affected.

[0004] The distance between the grain and the plasma generator has a crucial impact on the chemical activity of the plasma, energy transfer efficiency, and the final treatment effect. The optimal treatment distance can be determined experimentally. In existing technologies, the experimental setup mainly consists of a box containing an insulated support. The plasma generator is placed on the support to prevent arcing from the plasma generator from interfering with the experimental results. Below the support is the space for holding the grain sample. To obtain a suitable treatment distance, the height of the support needs to be repeatedly adjusted. Currently, the conventional approach is to use multiple blocks to support the support, changing the distance between the plasma generator and the grain sample by varying the number of blocks. However, this method is cumbersome in actual experiments. Utility Model Content

[0005] To address the cumbersome operation of existing technologies for measuring appropriate processing distances, this invention provides an experimental device for treating grains using atmospheric pressure dielectric barrier discharge plasma. This device eliminates the need to change the number of pads when measuring the appropriate processing distance. The processing distance between the plasma generator and the grain sample is altered by changing the position of the support plate on the first vertical plate, making the operation simple.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: an experimental device for treating grain with atmospheric pressure dielectric barrier discharge plasma, including a box, a plasma generating mechanism and a support mechanism are arranged inside the box, the plasma generating mechanism includes a support plate, a plasma generating component is placed on the support plate, a receiving space for accommodating grain samples is formed between the support plate and the bottom wall of the box, screws are connected to the edge of the support plate, the support mechanism includes a plurality of mounting brackets fixedly arranged on the bottom wall of the box, the mounting bracket includes a first upright plate, a first slide rail extending vertically is opened on the first upright plate, the screw passes through the first slide rail and the head of the screw can cooperate with the support plate to clamp the first upright plate to fix the position of the support plate.

[0007] As a further optimization of the experimental device for treating grain with atmospheric pressure dielectric barrier discharge plasma, the plasma generating component includes grounding electrodes and high-voltage electrodes distributed vertically, and the grounding electrodes and high-voltage electrodes are electrically connected, with a dielectric barrier layer disposed between the grounding electrodes and high-voltage electrodes.

[0008] As a further optimization of the experimental device for treating grain with atmospheric pressure dielectric barrier discharge plasma, the high-voltage electrode is formed by bending nickel wire, and the upper surface of the support plate is provided with several wire grooves to accommodate the nickel wire. One end of the nickel wire extends out from the wire groove and is connected to the grounding electrode.

[0009] As a further optimization of the experimental device for treating grain with atmospheric pressure dielectric barrier discharge plasma, the plasma generating mechanism includes a pressure plate located above the plasma generating component, and the pressure plate has a channel for the nickel wire to pass through.

[0010] As a further optimization of the experimental device for treating grain with atmospheric pressure dielectric barrier discharge plasma, the experimental device includes a power supply and at least two power transmission lines connected to the power supply. The power transmission lines enter the box through the through holes and are connected to the nickel wire and the grounding electrode.

[0011] As a further optimization of the experimental device for treating grain with atmospheric pressure dielectric barrier discharge plasma, the surface of the pressure plate has two grooves for the transmission wires to pass through, and the grooves extend to the end of the pressure plate.

[0012] As a further optimization of the experimental device for treating grain with atmospheric pressure dielectric barrier discharge plasma, the experimental device includes a gas measuring detector and a temperature and humidity detection sensor, with the probe of the gas measuring detector and the temperature and humidity detection sensor entering the box through the through hole.

[0013] As a further optimization of the experimental device for treating grain with atmospheric pressure dielectric barrier discharge plasma, the dielectric barrier layer is set as an alumina ceramic sheet.

[0014] As a further optimization of the experimental device for treating grain with atmospheric pressure dielectric barrier discharge plasma, the mounting frame includes a second vertical plate corresponding to the first vertical plate. The first and second vertical plates are perpendicular to each other and fixedly connected. The second vertical plate is provided with a second slide rail extending vertically. The screw passes through the first or second slide rail and the head of the screw can cooperate with the support plate to clamp the first or second vertical plate to fix the position of the support plate.

[0015] As a further optimization of the experimental device for treating grain with atmospheric pressure dielectric barrier discharge plasma, the support plate is set as an insulating plate.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] This invention incorporates a plasma generating mechanism and a support mechanism within a chamber. The plasma generating mechanism includes a support plate on which a plasma generating component is placed. A space for accommodating grain samples is formed between the support plate and the bottom wall of the chamber. Screws are attached to the edge of the support plate. The support mechanism includes multiple mounting brackets fixedly mounted on the bottom wall of the chamber. Each mounting bracket includes a first upright plate with vertically extending first slide rails. Screws pass through the first slide rails, and the heads of the screws engage with the support plate to clamp the first upright plate and fix its position. During the experiment, when the processing distance needs to be adjusted, the screws are loosened to allow the support plate to slide along the first upright plate. Once the plate reaches the desired position, the screws are tightened to fix the position of the support plate. This simplifies the experimental operation by allowing the processing distance to change. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a top view of the present invention;

[0020] Figure 3 This is a schematic diagram of the plasma generation assembly;

[0021] Figure 4 This is a schematic diagram of the box body of this utility model;

[0022] The markings in the diagram are: 1. Box body, 2. Bottom wall, 3. Mounting bracket, 4. First upright plate, 5. Second upright plate, 6. First slide rail, 7. Screw, 8. Support plate, 9. Pressure plate, 10. Wire groove, 11. Channel, 12. Groove, 13. Through hole, 14. High voltage electrode, 15. Power transmission line, 16. Grounding electrode, 17. Dielectric barrier layer, 18. Second slide rail. Detailed Implementation

[0023] The technical solution of this utility model will be further described in detail below with reference to specific embodiments. Parts not described or disclosed in detail in the following embodiments of this utility model should be understood as prior art known or should be known by those skilled in the art, such as the model of the power supply and transmission line 15, the model of the gas measuring detector and the model of the temperature and humidity detection sensor, the experimental principle of atmospheric pressure dielectric barrier discharge plasma for grain treatment, etc.

[0024] Example 1

[0025] An experimental apparatus for treating grain with atmospheric pressure dielectric barrier discharge plasma, such as... Figure 1 As shown, the system includes a housing 1, within which a plasma generating mechanism and a support mechanism are installed. The plasma generating mechanism includes a support plate 8, which is configured as an insulating plate. Figures 1 to 4As shown, a plasma generating assembly is placed on the support plate 8. The plasma generating assembly includes a grounding electrode 16 and a high-voltage electrode 14 distributed vertically, and the grounding electrode 16 and the high-voltage electrode 14 are electrically connected. A dielectric barrier layer 17 is provided between the grounding electrode 16 and the high-voltage electrode 14. The high-voltage electrode 14 is formed by bending nickel wire. The upper surface of the support plate 8 has several wire grooves 10 for accommodating nickel wires. The nickel wires are arranged along the wire grooves 10, and one end of the nickel wire extends out of the wire groove 10 and connects to the grounding electrode 16. In this embodiment, the grounding electrode 16 is a copper sheet. In this embodiment, the dielectric barrier layer 17 is an alumina ceramic sheet. To ensure the relative stability of the position between the support plate 8 and the plasma generating assembly, the plasma generating mechanism includes a pressure plate 9 located above the plasma generating assembly. To avoid affecting the electrical connection between the end of the nickel wire extending out of the wire groove 10 and the copper sheet, a channel 11 for the nickel wire to pass through is provided on the pressure plate 9. In this embodiment, the channel 11 is rectangular. In this embodiment, both the support plate 8 and the pressure plate 9 are made of acrylic sheets. To enhance the stability between the support plate 8 and the pressure plate 9, they can be sanded and bonded together around their perimeter. The experimental apparatus includes a power supply and at least two power transmission lines 15 connected to the power supply. The power supply can be set with different discharge power. Several through holes 13 are provided on the side wall of the housing 1. The power transmission lines 15 enter the housing 1 through the through holes 13 and are connected to the nickel wire and the grounding electrode 16. That is, the power transmission lines 15 enter the housing 1 through the through holes 13 and are connected to the nickel wire and the copper plate. The nickel wire and the copper plate undergo atmospheric pressure dielectric barrier discharge through the connection of high voltage to generate plasma. Two grooves 12 are provided on the surface of the pressure plate 9 for the power transmission lines 15 to pass through, and the grooves 12 extend to the end of the pressure plate 9. The power transmission lines 15 enter the interior of the housing 1 and pass through the grooves 12 before connecting to the copper sheet and the nickel wire, respectively.

[0026] In order to monitor the gas, temperature and humidity inside the chamber 1 in real time during the experiment, the experimental device includes a gas measuring detector and a temperature and humidity detection sensor. The probe of the gas measuring detector and the temperature and humidity detection sensor enter the chamber 1 through the through hole 13.

[0027] A space for accommodating grain samples is formed between the support plate 8 and the bottom wall 2 of the box body 1. Screws 7, made of nylon, are connected to the edge of the support plate 8. To facilitate adjustment of the distance between the support plate 8 and the bottom wall 2 of the box body 1, the support mechanism includes multiple mounting brackets 3 fixedly mounted on the bottom wall 2 of the box body 1. The mounting brackets 3 are made of acrylic sheets. Positioning plates are pre-fixed on the bottom wall 2 of the box body 1 as needed, and the mounting brackets 3 are fixed one-to-one on the positioning plates. In this embodiment, four positioning plates are provided, arranged in a rectangular pattern, corresponding to four mounting brackets 3. Each mounting bracket 3 includes a first upright plate 4 with a vertically extending first slide rail 6. Screws 7 pass through the first slide rail 6, and the head of the screws 7 engages with the support plate 8 to clamp the first upright plate 4, thus fixing the position of the support plate 8. When the processing distance needs to be adjusted, simply loosen screw 7 so that the support plate 8 can slide along the first upright plate 4. After sliding to the appropriate position, tighten screw 7 to fix the position of the support plate 8, thereby changing the processing distance. The experimental operation steps are simple.

[0028] The above are the basic embodiments of this utility model. Further improvements, optimizations, and limitations can be made based on the above to obtain the following embodiments:

[0029] Example 2

[0030] This embodiment is an improvement on Embodiment 1. Its main structure is the same as Embodiment 1, but the improvement lies in the following: To further ensure the stability of the support plate 8, the mounting bracket 3 includes a second upright plate 5 corresponding to the first upright plate 4. The first upright plate 4 and the second upright plate 5 are perpendicular to each other and fixedly connected. A second sliding track 18 extending vertically is provided on the second upright plate 5. The screw 7 passes through the first sliding track 6 or the second sliding track 18, and the head of the screw 7 can cooperate with the support plate 8 to clamp the first upright plate 4 or the second upright plate 5 to fix the position of the support plate 8. The support plate 8 is rectangular, and its four corners can abut against the first upright plate 4 and the second upright plate 5. To facilitate the movement of the support plate 8, two corners of the support plate 8 located on the same straight line can have a certain distance between them and the first upright plate 4 and the second upright plate 5.

[0031] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An experimental apparatus for treating grain with atmospheric pressure dielectric barrier discharge plasma, characterized in that: The device includes a housing (1), which contains a plasma generating mechanism and a support mechanism. The plasma generating mechanism includes a support plate (8), on which a plasma generating component is placed. A space for accommodating grain samples is formed between the support plate (8) and the bottom wall (2) of the housing (1). Screws (7) are connected to the edge of the support plate (8). The support mechanism includes multiple mounting brackets (3) fixedly mounted on the bottom wall (2) of the housing (1). Each mounting bracket (3) includes a first upright plate (4), on which a first slide rail (6) extending vertically is provided. Screws (7) pass through the first slide rail (6), and the head of the screws (7) can cooperate with the support plate (8) to clamp the first upright plate (4) to fix the position of the support plate (8).

2. The experimental apparatus for treating grain with atmospheric pressure dielectric barrier discharge plasma as described in claim 1, characterized in that: The plasma generating assembly includes a ground electrode (16) and a high-voltage electrode (14) distributed vertically, and the ground electrode (16) and the high-voltage electrode (14) are electrically connected. A dielectric barrier layer (17) is provided between the ground electrode (16) and the high-voltage electrode (14).

3. The experimental apparatus for treating grain with atmospheric pressure dielectric barrier discharge plasma as described in claim 2, characterized in that: The high-voltage electrode (14) is formed by bending nickel wire. The upper surface of the support plate (8) is provided with several wire grooves (10) to accommodate nickel wire. One end of the nickel wire extends out from the wire groove (10) and is connected to the grounding electrode (16).

4. The experimental apparatus for treating grain with atmospheric pressure dielectric barrier discharge plasma as described in claim 3, characterized in that: The plasma generating mechanism includes a pressure plate (9) located above the plasma generating assembly, and the pressure plate (9) has a channel (11) for the nickel wire to pass through.

5. The experimental apparatus for treating grain with atmospheric pressure dielectric barrier discharge plasma as described in claim 4, characterized in that: The side wall of the box (1) is provided with several through holes (13). The experimental device includes a power supply and at least two power transmission lines (15) connected to the power supply. The power transmission lines (15) enter the box (1) through the through holes (13) and are connected to the nickel wire and the grounding electrode (16).

6. The experimental apparatus for treating grain with atmospheric pressure dielectric barrier discharge plasma as described in claim 5, characterized in that: The pressure plate (9) has two grooves (12) on its surface for the transmission wire (15) to pass through, and the grooves (12) extend to the end of the pressure plate (9).

7. The experimental apparatus for treating grain with atmospheric pressure dielectric barrier discharge plasma as described in claim 5, characterized in that: The experimental apparatus includes a gas measuring detector and a temperature and humidity sensor. The probe of the gas measuring detector and the temperature and humidity sensor enter the housing (1) through the through hole (13).

8. The experimental apparatus for treating grain with atmospheric pressure dielectric barrier discharge plasma as described in claim 2, characterized in that: The dielectric barrier layer (17) is configured as an alumina ceramic sheet.

9. The experimental apparatus for treating grain with atmospheric pressure dielectric barrier discharge plasma as described in claim 1, characterized in that: The mounting bracket (3) includes a second upright plate (5) corresponding to the first upright plate (4). The first upright plate (4) and the second upright plate (5) are perpendicular to each other and fixedly connected. The second upright plate (5) has a second slide rail (18) extending vertically. The screw (7) passes through the first slide rail (6) or the second slide rail (18) and the head of the screw (7) can cooperate with the support plate (8) to clamp the first upright plate (4) or the second upright plate (5) to fix the position of the support plate (8).

10. The experimental apparatus for treating grain with atmospheric pressure dielectric barrier discharge plasma as described in claim 1, characterized in that: The support plate (8) is configured as an insulating plate.

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