A plasma jet chamber processing system and method

Abstract

The present invention discloses a plasma jet chamber processing system and method. The processing system includes a main box body and a secondary box body with a hollow interior. The main box body is located above the secondary box body, and a horizontally movable bearing plate is installed between the main box body and the secondary box body, enabling the main box body and the secondary box body to be vertically connected or blocked. A stirring module is installed in the main box body. The stirring module includes a main shaft arranged longitudinally, and a main fan blade is provided at the bottom of the main shaft. A main module is installed inside the main shaft, generating a plasma jet that is ejected downward. A plurality of secondary modules are evenly arranged in a ring shape on the top surface of the bearing plate, and the generated plasma jet is perpendicular to the leaf surface of the main fan blade and ejected upward. The present invention improves the jet intensity of the plasma, increases the contact area between the plasma and the waste, and improves the disinfection effect.

Description

Technical Field

[0001] The present invention belongs to the technical field of plasma disinfection, and relates to a plasma jet chamber treatment system and method. Background Art

[0002] In current society, the volume of medical waste is huge, and the demand for timely harmless treatment of medical waste has been increasing year by year. At present, there are mainly two methods for disinfecting and killing medical waste. The first is the sterilization and disinfection method, including high-temperature and high-pressure steam sterilization, chemical disinfection, microwave disinfection, etc. However, these traditional sterilization methods have high energy consumption, low disinfection and killing efficiency, and generally take a long time, and are not suitable for large-scale treatment. The second method is high-temperature incineration. However, due to the uncertainty of medical waste, incineration may produce various toxic gases, and it is also easy to leak viruses during the transfer of waste, causing secondary transmission.

[0003] Low-temperature plasma surface treatment is a newly emerging disinfection and killing technology in recent years. Low-temperature plasma contains a variety of charged particles and a large amount of active oxygen components, and has high-efficiency and broad-spectrum bactericidal ability. According to research, low-temperature plasma can kill a variety of bacteria and viruses within three minutes, and has the advantages of being fast, efficient, safe and green, and has broad application prospects for medical disinfection and killing. At present, low-temperature plasma disinfection has been widely used in medical devices, but the single treatment volume is small.

[0004] Since the disinfection and killing effect is directly related to the plasma concentration in the gas, the plasma concentration generated by a single plasma discharge device is relatively low, and it is difficult to treat a large number of waste materials at the same time, and the treatment efficiency is low. Therefore, there is currently no good low-temperature plasma treatment solution applied to the field of medical waste disinfection and killing. Summary of the Invention

[0005] In order to solve the above problems, the present invention provides a plasma jet chamber treatment system, which improves the jet intensity of the plasma, increases the contact area between the plasma and the waste, improves the disinfection and killing effect, and solves the problems existing in the prior art.

[0006] Another technical object of the present invention is to provide a use method of the plasma jet chamber treatment system.

[0007] The technical solution adopted by the present invention is to provide a plasma jet chamber treatment system, including a main box body and a sub-box body with a hollow interior. The main box body is located above the sub-box body, and a bearing plate capable of horizontal movement is installed between the main box body and the sub-box body, so that the main box body and the sub-box body are connected or blocked up and down;

[0008] A stirring module is installed inside the main box body. The stirring module includes a main shaft arranged longitudinally, and a main fan blade is provided at the bottom of the main shaft; the main module is installed inside the main shaft, and the main module generates a plasma jet that is ejected downward.

[0009] A plurality of sub-modules are evenly arranged in a ring shape on the top surface of the bearing plate. The plasma jets generated by the sub-modules are perpendicular to the leaf surface of the main fan blade from bottom to top.

[0010] Furthermore, a first air duct is provided inside the bearing plate, and a first air pump is provided in the center below the bearing plate. The gas flows from the center along the first air duct to the evenly distributed sub-modules.

[0011] Furthermore, a cover plate guide groove is provided at the inner top of the main box body. The groove-shaped cover plate guide groove is symmetric about the main shaft; the bottom of the cover plate guide groove is arc-shaped, centered on the main shaft, and the curvature gradually increases from the outside to the center; the size of the cover plate guide groove matches the size of the sub-module; a bearing plate guide groove is provided at the position corresponding to the main module on the top surface of the bearing plate, and the bearing plate guide groove is a hemispherical pit.

[0012] Furthermore, after the gas ejected by the main module collides with the bearing plate guide groove, the gas reverses direction. Horizontally, the gas radiates outward, causing the gas to flow upward around the main shaft; the air pump chamber at the tail of the main module is located inside the top plate, and the air pump chamber is connected to the internal cavity of the main box body through a second air duct; the gas ejected by the sub-module is ejected obliquely from below, driving the main fan blade to rotate and flowing upward at the same time. Part of the gas enters the air pump chamber through the second air duct and is processed by the main module again; another part of the gas collides with the cover plate guide groove, causing the gas to reverse direction vertically and the gas to converge inward horizontally and flow downward around the main shaft.

[0013] Furthermore, the gas flow rate of the main module is 5 - 20 m / s, and the gas flow rate of the sub-module is 8 - 23 m / s.

[0014] Furthermore, a first bevel gear is installed in the middle of the main shaft, and transverse sub-shafts are symmetrically installed on both sides of the main shaft. One end of the sub-shaft is connected to the main box body through a bearing, and the other end is installed with a second bevel gear. Each second bevel gear meshes with the first bevel gear, enabling the sub-shaft to be linked with the main shaft; a sub-fan blade is installed in the middle of each sub-shaft.

[0015] Furthermore, the material of the main fan blade is metal, which is connected to the first ground electrode of the sub-module and serves as the second ground electrode of the sub-module, forming a second electric field with the high-voltage electrode of the sub-module with the direction from bottom to top. The main fan blade periodically cooperates with the sub-module below during rotation.

[0016] Furthermore, the distance between the main fan blade and the sub-module is 25 mm - 35 mm.

[0017] Further, an extrusion module is installed inside the auxiliary box. The extrusion module includes an extrusion plate which is slidably connected to the side wall of the auxiliary box. The side of the extrusion plate away from the compressed object is fixedly connected to a horizontally arranged second rack. The second rack is meshed with a second gear. The center of the second gear is fixedly connected to a second motor shaft, and the second motor shaft is fixedly connected to the output end of a second motor. The second motor drives the second gear to rotate, and through meshing transmission, the second rack and the extrusion plate are driven to move left and right. A pressure sensor is provided on the side of the extrusion plate close to the compressed object. A baffle that can slide left and right is provided below the extrusion plate, and there are locking screw holes at the part contacting the auxiliary box, and it can be manually locked after the movement is completed.

[0018] A method for using a plasma jet chamber treatment system includes the following steps:

[0019] S1. Open the cover plate above the main box and pour in the waste.

[0020] S2. Start the main module and the auxiliary module. The main module and the auxiliary module form a gas reflux in the box. The auxiliary module drives the main fan blade of the stirring module to rotate. At the same time, the main fan blade made of metal serves as the second ground electrode of the auxiliary module, and during the rotation process, it cooperates with the auxiliary module below periodically to increase the plasma concentration. The gas ejected by the auxiliary module enters the air pump chamber of the upper main module to complete the secondary treatment of the gas, further increasing the plasma concentration. The active substances in the plasma fully contact the waste under the action of the stirring module and the gas reflux.

[0021] The beneficial effects of the present invention are as follows:

[0022] 1. The embodiments of the present invention creatively propose the design of the plasma jet main and auxiliary modules and the air duct to achieve the in-chamber circulation treatment. The separated design of the main and auxiliary modules can form a gas reflux in the box, which can quickly increase the plasma concentration in a short time, and at the same time enable the plasma gas to fully contact the waste for a long time, improving the disinfection and sterilization efficiency.

[0023] 2. The airflows of the plasma main and auxiliary modules in the embodiments of the present invention converge in the waste area after being guided, which is more efficient and has a better treatment effect compared with the traditional plasma activation gas diffusely filling the entire container.

[0024] 3. The embodiments of the present invention can complete the functions of plasma jet generation and main fan blade stirring through a single power source, which not only effectively increases the contact area and time between the waste and the plasma, but also the main fan blade serves as the ground electrode to strengthen the plasma discharge, further enhancing the plasma concentration.

[0025] 4. The embodiments of the present invention can achieve on-site rapid disinfection and sterilization treatment of medical waste, which is efficient, safe and low-cost; the extrusion module can reduce the occupied space of the waste and facilitate subsequent recycling and reprocessing. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0027] Figure 1 It is a schematic external view of an embodiment of the present invention.

[0028] Figure 2 It is a schematic internal structure view of an embodiment of the present invention.

[0029] Figure 3 It is a schematic structure view of the stirring module in an embodiment of the present invention.

[0030] Figure 4 It is a schematic structure view of the carrier plate in an embodiment of the present invention.

[0031] Figure 5 It is a schematic view of the internal gas reflux flow direction in an embodiment of the present invention.

[0032] Figure 6 It is a schematic view of the gas flow direction in the main module gas chamber in an embodiment of the present invention.

[0033] Figure 7 It is a schematic view of the gas flow direction for the repeated use of the air pump in an embodiment of the present invention.

[0034] Figure 8 It is a schematic structure view of the extrusion module in an embodiment of the present invention.

[0035] Figure 9 It is a detailed view of the auxiliary box body in an embodiment of the present invention.

[0036] Figure 10 It is a schematic structure view of the main module in an embodiment of the present invention.

[0037] In the figure: 1, main box body; 2, auxiliary box body; 3, cover plate; 4, top plate; 5, stirring module; 6, bearing plate; 7, extrusion module; 8, main shaft; 9, first bevel gear; 10, main module; 11, main fan blade; 12, second bevel gear; 13, auxiliary shaft; 14, auxiliary fan blade; 15, auxiliary module; 16, first air duct; 17, first air pump; 18, first rack; 19, first motor; 20, first motor shaft; 21, first gear; 22, cover plate guiding groove; 23, bearing plate guiding groove; 24, air hole; 25, second air duct; 26, air pump chamber; 27, second air pump; 28, extrusion plate; 29, baffle plate; 30, second motor; 31, second motor shaft; 32, second gear; 33, locking screw hole; 34, second rack; 35, pressure sensor; 36, plasma power supply; 37, tubular barrier medium; 38, high-voltage electrode; 39, ground electrode; 40, first guide rail; 41, second guide rail. Specific embodiments

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0039] Embodiment 1

[0040] A plasma jet chamber processing system, as Figure 1-4 shown, includes a main box body 1 and an auxiliary box body 2 with a hollow interior. The main box body 1 is located above the auxiliary box body 2 and can communicate with each other. The main box body 1 is used to place the main module 10 and the stirring module 5, and the auxiliary box body 2 is used to place the auxiliary module 15 and the extrusion module 7.

[0041] The stirring module 5 includes a main shaft 8 arranged longitudinally, and a main fan blade 11 is provided at the bottom of the main shaft 8. The main module 10 is installed inside the main shaft 8 and is used to generate a plasma jet and spray it from top to bottom.

[0042] As Figure 2 、 4As shown in FIGS. 5, a bearing plate 6 capable of horizontal movement is provided at the top of the auxiliary box body 2, so that the main box body 1 and the auxiliary box body 2 are vertically connected or blocked; the auxiliary modules 15 are evenly distributed around the bearing plate 6, and the plasma jets generated by the auxiliary modules 15 are obliquely ejected from bottom to top, forming an angle of 60° with the plane of the bearing plate. The ejected gas is basically perpendicular to the blade surface of the main fan blade 11. By blowing the main fan blade 11 through the air flow, a single power source can be formed, and there is no need to install a motor on the main fan blade 11 anymore. A first air duct 16 is provided inside the bearing plate 6, and a first air pump 17 is provided at the center below the bearing plate 6. The gas flows from the center along the first air duct 16 to the four evenly distributed auxiliary modules 15.

[0043] When disinfecting waste with the device of this embodiment, open the cover plate 3, pour waste into the main box body 1 from the top, and start the stirring module 5, the main module 10 and the auxiliary module 15. The jets of the main module 10 and the auxiliary module 15 are ejected in opposite directions, which can generate convection in the main box body 1. With the multi-directional stirring of the stirring module 5, the waste can be fully mixed with the generated plasma gas in the main box body 1; at this time, the generated atmospheric pressure plasma jet can kill all the viruses and bacteria contained in the waste in all directions.

[0044] Embodiment 2

[0045] As Figure 6 shown, a cover plate guide groove 22 is provided at the inner top of the main box body 1. The two groove-shaped cover plate guide grooves 22 are symmetric about the main shaft 8; the cover plate guide groove 22 is a rectangle with a length of 0.5 m and a width of 0.3 m in a top view. The dimensions here match the dimensions of the auxiliary module 15; the air flow of the auxiliary module 15 is ejected from bottom to top, and it is necessary to ensure that the cover plate guide groove 22 can cover all gas areas, and the size cannot be less than this range.

[0046] The cover plate guide groove 22 is arc-shaped at the bottom in a front view. Centered on the main shaft 8, the slope (curvature) gradually increases from the outside to the center; the slope setting can better guide the air flow to flow back, preventing the gas from forming a turbulent flow due to impacting the wall surface and affecting the air flow back effect inside the box body; the slope is 45° - 90° for the outer angle. This range can ensure the diversion of most of the gas. If the outer angle is too large, it is easy for the gas to generate a turbulent flow by itself (if the angle is too large, all the gas cannot be drained in time, resulting in gas accumulation). If the outer angle is too small, the gas will directly impact the cover plate and cannot flow back.

[0047] At the position corresponding to the main module 10 on the top surface of the bearing plate 6, a bearing plate guide groove 23 is provided. The bearing plate guide groove 23 is a hemispherical concave pit with a radius of 0.18 m, and the center of the sphere is 0.15 m away from the highest point of the bearing plate guide groove 23. The groove cannot be too deep, and the coverage area should be as large as possible. The specific dimensions can be changed to complete the diversion function.

[0048] As Figure 7As shown, the air pump chamber 26 at the tail of the main module 10 is located inside the top plate, between the two cover plate guiding grooves 22, and there is no interference with the cover plate guiding grooves 22; the air pump chamber 26 is connected to the internal cavity of the main box body 1 through the second air duct 25, and a second air pump 27 is installed in the air pump chamber 26. The second air pump 27 is used to pump the gas in the air pump chamber 26 into the inside of the main shaft 8.

[0049] The main module 10 and the auxiliary module 15 cooperate with each other. The main module 10 ejects gas to form a central-to-peripheral return flow, specifically manifested as the gas ejecting downward from the middle, colliding with the carrier plate guiding groove 23 and then reversing the gas, and radiating the gas outward in the horizontal direction, so that the gas flows upward around the main shaft 8 from bottom to top.

[0050] The auxiliary module 15 is obliquely placed inside the carrier plate 6, and the auxiliary module 15 ejects gas to form a peripheral-to-central return flow; specifically manifested as: the gas ejects obliquely clockwise from the lower part, drives the main fan blade 11 to rotate, and at the same time flows upward. At this time, the gas is divided into two parts. One part enters the air pump chamber 26 through the second air duct 25 at the top; the other part collides with the cover plate guiding groove 22 of the main box body 1, reverses the gas in the vertical direction, and makes the gas gather inward in the horizontal direction, and finally flows downward around the main shaft 8 at the center of the main box body 1. All the gas used for the jet of the main module 10 comes from the gas processed by the auxiliary module 15, which can further increase the plasma concentration.

[0051] The gas generated by the main module 10 and the auxiliary module 15 collides in the middle of the main box body 1, so that the two-way jet gases finally converge at the waste gathering place (above the main fan blade 11), forming a high-concentration plasma gas treatment area, realizing the efficient disinfection of the waste in the main box body 1. This cycle is different from using a pump for pumping, because the plasma gas is always in a flowing state when pumped by the air pump and will not gather, and the binding efficiency of the active components in it with the waste is low. The main box body 1 needs to be provided with air holes 24, and the air holes 24 are evenly distributed on the middle outer wall of the main box body 1 to guide the timely discharge of the excess gas inside the main box body 1.

[0052] In order to verify the effect of the plasma aggregation area in Embodiment 2 of the present invention, an existing chamber internal circulation treatment system using an air pump was used as a comparison. The specific design is: there is an air inlet and an air outlet, the plasma gas enters from the air inlet and ejects from the air outlet; after ejection, it is collected and continues to circulate through the plasma generation area, that is, using a pump for circulating pumping. Three identical bacterial tablets were placed inside the box body for inactivation experiments of 3 minutes and 5 minutes. The experimental results are shown in Table 1.

[0053] Table 1 Comparison of inactivation rates between the existing air pump circulation system and Embodiment 2 of the present invention

[0054] Existing air pump circulation system Embodiment 2 of the present invention Inactivation rate of bacteria tablet 1 for 3 min % 80.1 85.1 Inactivation rate of bacteria tablet 2 for 3 min % 82.4 84.5 Inactivation rate of bacteria tablet 3 for 3 min % 83 89.2 Average inactivation rate of bacteria tablets for 3 min % 81.83 86.27 Inactivation rate of bacteria tablet 1 for 5 min % 95.3 98.3 Inactivation rate of bacteria tablet 2 for 5 min % 95.7 99.2 Inactivation rate of bacteria tablet 3 for 5 min % 96.4 97.6 Average inactivation rate of bacteria tablets for 5 min % 95.8 98.4

[0055] As can be seen from the results, the bactericidal effect of the plasma circulation treatment system using an air pump is weaker than that of Example 2 of the present invention.

[0056] How to adjust the plasma convergence area according to the waste convergence area is also a difficult point, which needs to be achieved by adjusting the gas flow rates of the main and auxiliary module air pumps. The following are the data in the main box 1 during the disinfection of Example 2 of the present invention under several different working conditions; the test object is an Escherichia coli tablet prepared according to the preparation requirements (bacterial concentration, preparation method) in the "Disinfection Technical Specification 2002"; four experiments are carried out respectively, and the gas flow rates of the main and auxiliary modules increase in a gradient. Since the gas flow path of the auxiliary module 15 is longer, the gas flow rate of the auxiliary module 15 is always greater than that of the main module 10. The gas flow rate of the main module 10 is 5-20 m / s, and the gas flow rate of the auxiliary module 15 is 8-23 m / s; add simulated waste accounting for 2 / 3 of the volume of the main box 1 (about 0.005 m 3 ), put three tablets of the same bacteria in it, and carry out inactivation experiments for 3 min and 5 min respectively. The experimental data are shown in Table 2.

[0057] Table 2 Data records of four experiments under various working conditions

[0058] Experiment 1 Experiment 2 Experiment 3 Experiment 4 Gas flow rate of the main module m / s 5 10 15 20 Gas flow rate of the sub-module m / s 8 13 18 23 Rotational speed of the main fan blade rad / s 0.97 1.86 2.93 3.65 Inactivation rate of bacteria tablet 1 for 3 min % 63.2 78.5 90.5 78.9 Inactivation rate of bacteria tablet 2 for 3 min % 73.8 75.5 92.7 75.8 Inactivation rate of bacteria tablet 3 for 3 min % 68.6 75.3 90 80 Average inactivation rate of bacteria tablets for 3 min % 68.5 76.4 91.1 78.2 Inactivation rate of bacteria tablet 1 for 5 min % 89.9 92.1 99.3 99.9 Inactivation rate of bacteria tablet 2 for 5 min % 87.3 93 99.9 99.9 Inactivation rate of bacteria tablet 3 for 5 min % 86.3 94.5 99.9 99.5 Average inactivation rate of bacteria tablets for 5 min % 87.8 93.2 99.7 99.8

[0059] After testing, at room temperature, the inactivation rate of plasma against Escherichia coli is as high as 91.1% in 3 min and 99.9% in 5 min, basically exceeding the detection threshold, proving that the disinfection effect is good. Among them, the disinfection effect is the best when the gas flow rates of the main and auxiliary modules are 15 m / s and 18 m / s respectively.

[0060] Example 3,

[0061] As Figure 3 shown, the upper end of the main shaft 8 is connected to the main box 1 through a bearing. A first bevel gear 9 is installed in the middle of the main shaft 8. Transverse auxiliary shafts 13 are symmetrically installed on both sides of the main shaft 8. One end of the auxiliary shaft 13 is connected to the main box 1 through a bearing, and a second bevel gear 12 is installed at the other end. Both second bevel gears 12 are meshed with the first bevel gear 9, so that the auxiliary shaft 13 and the main shaft 8 are linked with a transmission ratio of 1:1.5 to 1:2; the bottom end of the main shaft 8 is installed with a main fan blade 11, and the middle parts of the two auxiliary shafts 13 are installed with auxiliary fan blades 14.

[0062] The plasma jet generated by the auxiliary module 15 is obliquely sprayed upward along the first air duct 16, driving the main fan blade 11 to rotate. The main fan blade 11 rotates clockwise (viewed from above), causing the waste to be treated in the main box 1 to rotate clockwise; the two auxiliary fan blades 14 rotate in opposite directions, and the rotation speed is less than that of the main fan blade 11.

[0063] Example 4,

[0064] The material of the main fan blade 11 is metal, which is connected to the first ground electrode of the sub-module 15 and serves as the second ground electrode of the sub-module 15. It forms a second electric field with the high-voltage electrode of the sub-module 15, and the direction of this electric field is from bottom to top. This electric field is located at the bottom of the main box 1, and the direction is from each high-voltage electrode of the sub-module 15 to the main fan blade 11. The high-energy electrons and other active particles in the plasma further increase their moving speed under the action of the electric field, which can drive the high-energy electrons and other active particles in the plasma to quickly disperse outward, further enhance the plasma jet, increase the plasma concentration, and improve the disinfection efficiency.

[0065] In the embodiment of the present invention, the main shaft 8 of the stirring module 5 is of a hollow structure, and it is not easy to install the motor. By coupling the sub-module 15 with the main fan blade 11, the air flow of the sub-module 15 drives the stirring module 5, which can not only overcome the driving problem of the stirring module 5, but also the main fan blade 11 of the stirring module 5 is made of conductive metal and can be used as a ground electrode. When it rotates past the nozzle of the sub-module 15, at this time, under the attraction of the ground electrode, the plasma jet of the sub-module 15 can be ejected farther, further increasing the plasma concentration; the main fan blade 11 can not only enhance the contact between the plasma and the items mechanically, but also further strengthen the plasma jet, and further improve the disinfection effect by various means.

[0066] Among them, the distance between the main fan blade 11 and the sub-module 15 is very important. If it is too far, it cannot play the role of enhancing the plasma. If it is too close, there will be dead corners in the jet of the sub-module, and it is difficult to drive. According to current experiments, the distance of 25mm - 35mm has a better effect. In order to determine the distance between the main fan blade 11 and the sub-module 15, relevant experiments are carried out. Only adjust the air pump flow rate of the sub-module 15 (do not start the main module 10 to prevent interference), and the air pump flow rate of the sub-module 15 is 18mm; record the rotation speed of the main fan blade 11 and the sterilization rate, put three same type of bacterial tablets, and conduct inactivation experiments for 3min and 5min respectively, and the experimental results are shown in Table 3:

[0067] Table 3 Inactivation rates corresponding to different distances between the main fan blade and the sub-module

[0068] Experiment 1 Experiment 2 Experiment 3 Experiment 4 Experiment 5 Distance between the main fan blade and the sub-module mm 20 25 30 35 40 3.53 3.33 2.93 2.05 0.75 Rotational speed of the main fan blade m / s 60.2 66.9 69.5 68.6 61.1 Inactivation rate of bacteria tablet 1 for 3 min % 55.3 65 73.3 65.6 64.3 Inactivation rate of bacteria tablet 2 for 3 min % 57.2 66.3 73.1 65.9 60.4 Inactivation rate of bacteria tablet 3 for 3 min % 57.57 66.07 71.97 66.70 61.93 Average inactivation rate of bacteria tablets for 3 min % 71.9 75.3 80.1 77.7 66.8 Inactivation rate of bacteria tablet 1 for 5 min % 73.5 75.2 76.5 75.5 70.1 Inactivation rate of bacteria tablet 2 for 5 min % 68.3 74.5 81.1 75.7 69.9 Inactivation rate of bacteria tablet 3 for 5 min % 71.23 75.00 79.23 76.30 68.93

[0069] It can be seen that due to the shutdown of the main module 10, the disinfection level of the device is greatly reduced. When the distance between the main fan blade 11 and the sub-module 15 is 25 - 35mm, the inactivation rate of the device at 5min is significantly higher. Although the rotation speed of the main fan blade 11 in Experiment 1 is the fastest and the internal stirring is better, the too close distance causes the jet of other plasmas of the sub-module 15 to be blocked, and the plasma accumulates at the nozzle, which affects the generation of new plasma.

[0070] Example 5

[0071] Such as Average inactivation rate of bacteria tablets for 5 min %As shown, the main module 10 can be set as a dielectric barrier discharge jet structure, including a high-voltage electrode 38, a tubular barrier medium 37 and a ground electrode 39. The tubular barrier medium 37 is an insulating medium quartz tube; the quartz tube and the ground electrode 39 are closely fitted, and both are installed inside the main shaft 8, and are connected to the internal space of the main box body 1 at the lower part; the ground electrode 39 is a copper ring and can be sleeved outside the quartz tube; the high-voltage electrode 38 is placed inside the quartz tube and suspended. The high-voltage electrode is an iron probe, and the tail of the high-voltage electrode 38 is electrically connected to the plasma power supply 36 and fixed on the plasma power supply 36; the head of the high-voltage electrode 38 is flush with the ring of the ground electrode 39.

[0072] There are two paths (branch path and main path) at the tail of the quartz tube. The main path is connected to the plasma power supply 36, and the branch path is connected to the air pump chamber 26. The tail of the quartz tube is connected to the second air pump 27, and the second air pump 27 is connected to the control module. The control module can control the gas flow rate, and the gas can flow stably and at high speed through the high-voltage electrode 38.

[0073] The sub-module 15 is composed of four discharge structures evenly distributed on the carrier plate 6. Each discharge structure has the same structure as the main module 10. The difference is that the ground electrode of the sub-module 15 is the main fan blade 11, and the tails of the four quartz tubes are connected through the first air duct 16 and are uniformly supplied with air by the first air pump located below the carrier plate 6. The plasma power supply 36 can be any one of a sine power supply, a pulse power supply, etc., and supplies power to the main module 10 and the sub-module 15.

[0074] Example 6

[0075] As Figure 10 As shown, the carrier plate 6 is slidably connected to the sub-box body 2 through the first guide rail 40. The front and rear sides of the carrier plate 6 are provided with first racks 18, and the first racks 18 are meshed with the first gears 21. The center of the first gears 21 is fixedly connected to the first motor shaft 20, and the first motor shaft 20 is fixedly connected to the output end of the first motor 19; the first motor 19 drives the first gears 21 to rotate, and drives the carrier plate 6 to move left and right through meshing transmission. The first motor 19 is a low-speed motor and is connected to the control module. During disinfection, the carrier plate 6 is controlled to be located on the right side to block the main box body 1 and the sub-box body 2 and carry the waste in the main box body 1. After disinfection is completed, the carrier plate 6 is controlled to move leftward, and the waste falls into the sub-box body 2. After it completely falls into the sub-box body 2, the carrier plate 6 is controlled to move rightward to close the sub-box body 2, and the extrusion module 7 starts to work.

[0076] As Figure 5 Figures 8-9As shown, the extrusion module 7 includes an extrusion plate 28, which is slidably connected to the auxiliary box body 2 through a second guide rail 41. The side of the extrusion plate 28 away from the compressed object is fixedly connected to a horizontally arranged second rack 34, the second rack 34 is meshed with the second gear 32, the center of the second gear 32 is fixedly connected to the second motor shaft 31, and the second motor shaft 31 is fixedly connected to the output end of the second motor 30; the second motor 30 drives the second gear 32 to rotate, and drives the second rack 34 and the extrusion plate 28 to move left and right through meshing transmission; the second motor 30 is a low-speed motor and is connected to the control module.

[0077] A pressure sensor 35 is provided on the right side of the extrusion plate 28 (the side close to the compressed object). The pressure sensor 35 is connected to the control module and feeds back the pressure value to the control module in real time. Different pressure thresholds are set for different wastes (selected by the user through the interactive module before turning on the machine). When the threshold is reached, the control module controls the second motor 30 to stop rotating; a baffle 29 that can slide left and right is provided under the extrusion plate 28, and a locking screw hole 33 is provided at the contact part with the sub-box 2, which can be manually locked after the movement is completed; the second guide rail 41 and the extrusion plate 28 have no interference with the baffle 29, and there is a long strip of convergence under the sub-box 2, which acts as a guide rail to support the baffle 29.

[0078] After the plasma jet disinfection module completes its work, the carrier plate 6 moves left under the control of the control module, causing waste to fall into the auxiliary box 2. Once the waste enters the auxiliary box 2, the extrusion plate 28 moves right to compact the waste. The control module receives data from the pressure sensor 35 and stops moving when the threshold is reached. The baffle 29 is manually moved left (rotating and tightening the thread), and the compacted waste falls and is collected. The carrier plate 6 moves right to seal the waste and proceed to the next disinfection cycle.

[0079] When the extrusion module is working, it can ensure that the waste is compressed to the maximum extent while protecting the device, making it convenient for personnel to have direct contact with the waste during subsequent processing, reducing the area occupied by the waste and lowering transportation costs.

[0080] The core of the embodiment of the present invention is that the plasma jet is divided into two modules, the main and the sub-modules. With the help of the airway design and the rotation of the fan blades, the plasma jet is circulated and processed inside the chamber, and the discharge gas is recycled at the same time; the plasma jet drives the fan blades to rotate, and then the rotating fan blades act as the ground electrode of the plasma jet generation sub-module. Whenever the fan blades turn to the nozzle, they can drive active particles such as high-energy electrons in the plasma to diffuse outward rapidly, thereby enhancing the jet.

[0081] A method for using a plasma jet chamber processing system comprises the following steps:

[0082] When medical waste needs to be disinfected, the cover 3 above the main housing 1 is first opened, the waste is poured in, and the device is then activated through the interactive module. The plasma power supply 36 is turned on, transmitting a high voltage to the high-voltage electrode of the dielectric barrier discharge structure, generating a large amount of plasma in the cavity between the high-voltage electrode and the quartz tube. This high-speed airflow then creates a plasma jet, causing the ejected gas to carry the plasma. The main module 10 and the submodule 15 form a gas reflux within the housing. The submodule 15 drives the stirring module 5, while the copper main fan blade 11 acts as a secondary ground electrode for the submodule 15, periodically cooperating with the submodule 15 below during rotation to increase the plasma concentration. The ejected gas enters the air pump chamber 26 of the upper main module 10, completing secondary gas processing and further increasing the plasma concentration. The active substances in the plasma fully come into contact with the waste through the stirring module 5 and the gas reflux, effectively killing viruses and bacteria in the waste.

[0083] After the sterilization is complete, the stirring module 5 and the plasma jet generating module are powered off and stop working. The carrier plate 6 moves left, the waste falls into the auxiliary box 2, and the extrusion module 7 starts working. The control module controls the rotation of the motor, which is controlled by receiving data from the pressure sensor. When the threshold is reached, the motor stops and the extrusion is completed. The baffle 29 is manually opened, and the motor is controlled to rotate again through the interactive module. The processed waste is transferred to the collection bag below, completing the sterilization.

[0084] The present invention realizes rapid sterilization and disinfection of a large amount of medical waste by using a plasma device, can compress the volume of the waste, does not directly contact the waste during the operation process, is safe to operate, and has low cost.

[0085] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention are included in the scope of protection of the present invention.

Claims

1. A plasma jet chamber processing system, comprising a main box (1) with a hollow interior and a secondary box (2), characterized in that: The main box (1) is located above the auxiliary box (2), and a horizontally movable bearing plate (6) is installed between the main box (1) and the auxiliary box (2), so that the main box (1) and the auxiliary box (2) are connected or blocked from each other in the vertical direction; A stirring module (5) is installed in the main box (1), and the stirring module (5) includes a longitudinally arranged main shaft (8), and a main fan blade (11) is provided at the bottom of the main shaft (8); a main module (10) is installed inside the main shaft (8), and the main module (10) generates a plasma jet that is ejected from top to bottom; The top surface of the carrier plate (6) is evenly provided with a plurality of sub-modules (15) in a ring shape, and the plasma jets generated by the sub-modules (15) are perpendicular to the blade surface of the main fan blade (11) from bottom to top; A first air channel (16) is provided inside the carrier plate (6), and a first air pump (17) is provided in the center below the carrier plate (6). Gas flows from the center along the first air channel (16) to the evenly distributed sub-modules (15); The inner top of the main box (1) is provided with a cover plate guide groove (22), and the groove-shaped cover plate guide groove (22) is symmetrical about the main axis (8); the bottom of the cover plate guide groove (22) is arc-shaped, with the main axis (8) as the center, and the curvature gradually increases from the outside to the center; the size of the cover plate guide groove (22) matches the size of the secondary module (15); the top surface of the carrier plate (6) and the position corresponding to the main module (10) are provided with a carrier plate guide groove (23), and the carrier plate guide groove (23) is a hemispherical pit; The gas ejected from the main module (10) collides with the guide groove (23) of the support plate, causing the gas to reverse direction and radiate outward in the horizontal direction, so that the gas flows upward around the main shaft (8); the air pump chamber (26) at the tail of the main module (10) is located inside the top plate, and the air pump chamber (26) is connected to the internal cavity of the main box (1) through the second air channel (25); the gas ejected from the sub-module (15) is ejected obliquely from the bottom, driving the main fan blade (11) to rotate and flowing upward at the same time, a part of the gas enters the air pump chamber (26) from the second air channel (25) and is processed again by the main module (10); the other part of the gas collides with the guide groove (22) of the cover plate, causing the gas to reverse direction in the vertical direction and gather inward in the horizontal direction, so that the gas flows downward around the main shaft (8).

2. A plasma jet chamber processing system according to claim 1, characterized in that: The gas flow rate of the main module (10) is 5-20 m / s, and the gas flow rate of the sub-module (15) is 8-23 m / s. The gas flow rate of the sub-module (15) is always greater than the gas flow rate of the main module (10).

3. The plasma jet chamber processing system according to claim 1, characterized in that: A first bevel gear (9) is installed in the middle of the main shaft (8), and horizontal secondary shafts (13) are symmetrically installed on both sides of the main shaft (8). One end of the secondary shaft (13) is connected to the main box (1) through a bearing, and the other end is installed with a second bevel gear (12). Each second bevel gear (12) is meshed with the first bevel gear (9), so that the secondary shaft (13) and the main shaft (8) are linked; and a secondary fan blade (14) is installed in the middle of each secondary shaft (13).

4. The plasma jet chamber processing system according to claim 1, characterized in that: The main fan blade (11) is made of metal and is connected to the first ground electrode of the sub-module (15). It serves as the second ground electrode of the sub-module (15) and forms a second electric field with a direction from bottom to top with the high-voltage electrode of the sub-module (15). The main fan blade (11) periodically cooperates with the sub-module (15) below during rotation.

5. The plasma jet chamber processing system according to claim 1, characterized in that: The distance between the main fan blade (11) and the secondary module (15) is 25 mm to 35 mm.

6. The plasma jet chamber processing system according to claim 1, characterized in that: The auxiliary box (2) is provided with an extrusion module (7), which includes an extrusion plate (28), which is slidably connected to the side wall of the auxiliary box (2), and a side of the extrusion plate (28) away from the compressed object is fixedly connected to a horizontally arranged second rack (34), the second rack (34) is meshed with a second gear (32), the center of the second gear (32) is fixedly connected to a second motor shaft (31), and the second motor shaft (31) is fixedly connected to an output end of a second motor (30); the second motor (30) drives the second gear (32) to rotate, and drives the second rack (34) and the extrusion plate (28) to move left and right through meshing transmission; a pressure sensor (35) is provided on the side of the extrusion plate (28) close to the compressed object; a baffle (29) that can slide left and right is provided below the extrusion plate (28), and a locking screw hole (33) is provided at the contact portion with the auxiliary box (2), and the plate can be manually locked after the movement is completed.

7. The method for using the plasma jet chamber processing system according to claim 1, wherein: The following steps are involved: S1, open the cover (3) above the main box (1) and pour in the waste; S2, the main module (10) and the sub-module (15) are turned on, and the main module (10) and the sub-module (15) form a gas reflux in the box; the sub-module (15) drives the main fan blade (11) of the stirring module (5) to rotate, and at the same time, the main fan blade (11) made of metal serves as the second ground electrode of the sub-module (15), and cooperates with the lower sub-module (15) periodically during the rotation process to increase the plasma concentration; the sub-module (15) ejects gas into the gas pump chamber (26) of the upper main module (10), completing the secondary treatment of the gas and further increasing the plasma concentration; the active substances in the plasma are fully in contact with the waste under the action of the stirring module (5) and the gas reflux.

Images