CN103826379B - Nonequilibrium plasma generation device and particulate powder surface modification treatment system - Google Patents
Nonequilibrium plasma generation device and particulate powder surface modification treatment system Download PDFInfo
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Abstract
The invention discloses a kind of nonequilibrium plasma generation device and particulate powder surface modification treatment system, comprise cavity, gauze screen and the high-field electrode unit that is arranged in cavity and low-field electrode unit; High-field electrode unit is arranged on the lower surface of high voltage electrode insulation cover plate, and high-field electrode unit comprises the high-voltage line electrode of multiple uniform array arrangement, and high voltage electrode insulation cover plate is provided with the first through hole of multiple uniform array arrangement; One end that one end of each high-voltage line electrode and high-field electrode go between is fixed; The other end of high-voltage line electrode is fixed by high-field electrode set bolt, and the other end of high-field electrode lead-in wire is drawn by the first through hole; And using the high voltage pulse input as nonequilibrium plasma generation device after the connection of each high-field electrode lead-in wire.Present invention employs nonequilibrium plasma in the repetitive frequency pulsed Direct driver atmosphere air of high-voltage nanosecond, discharge peak currents density is larger, and the efficiency producing active particle is better, and the non-equilibrium property of plasma is also higher.
Description
Technical field
The invention belongs to gas discharge and plasma application field, relate to a kind of nonequilibrium plasma generation device and particulate powder surface modification treatment system.
Background technology
In recent years, atmospheric air nonequilibrium plasma received concern especially due to exclusive advantage and huge application prospect.Nonthermal plasma is a kind of partially ionized low temperature plasma, and its electronics and ion temperature differ greatly.Containing a large amount of electronics, metastable state ion, free radical isoreactivity particle in this plasma, there is stronger reactivity, therefore at numerous areas such as the energy, material, machining, environmental protection, there is application prospect.A wherein very important research direction is for the explorative research to material surface modifying process.Nonequilibrium plasma is used for the process of material and mostly concentrates on process to macroscopical finished products such as films, and particulate powder has more extensively and the intermediate raw material of special purpose as the macroscopical finished product of a kind of ratio, and the research it being carried out to surface modification treatment is but relatively less.Compared with film or similar material, the contact area of particulate powder material and gas is much bigger.Thus, the configuration of surface of powder and structure after plasma treatment, even all likely there is marked change in particle size.
At present, the more ripe production method of atmospheric air non-equilibrium plasma is dielectric barrier discharge and corona discharge, as CN101838800.B.Dielectric barrier discharge is due to the existence of dielectric, the distance of discharging gap is general all smaller, have impact on structure extension and the practical application of sparking electrode, dielectric barrier in use may change proterties and produce pollution in addition, and its material properties also may impact exoelectrical reaction.The weak point of corona discharge is that ionisation of gas mainly concentrates on ate electrode, is difficult to the plasma obtaining large volume in whole room atmosphere, and plasma ionization limited efficacy, the electron energy of generation is not high, is difficult to be applied to large-scale industrial production.Therefore, low cost, continuously generation large area or large volume nonthermal plasma in the natural environment of normal temperature atmospheric air, the industrial applications for plasma is significant.
Summary of the invention
For the defect of prior art, the invention provides a kind of nonequilibrium plasma generation device, its object is to solve the plasma being difficult to obtain large volume that existing plasma discharge form exists, energy utilization efficiency is low, discharge peak currents density is little, produce that active particle efficiency is low, plasma non-equilibrium property is poor, use restriction greatly, an application cost high-technology difficult problem.
The invention provides a kind of nonequilibrium plasma generation device, comprise cavity, gauze screen and the high-field electrode unit that is arranged in cavity and low-field electrode unit; Two surfaces relative in described cavity are as high voltage electrode insulation cover plate and low-field electrode insulation cover plate, and two relative sides are as gauze screen, and two other relative side is as sealed insulation plate; Described high-field electrode unit is arranged on the lower surface of described high voltage electrode insulation cover plate, and described high-field electrode unit comprises the high-voltage line electrode of multiple uniform array arrangement, and described high voltage electrode insulation cover plate is provided with the first through hole of multiple uniform array arrangement; One end that one end of each high-voltage line electrode and described high-field electrode go between is fixed; The other end of described high-voltage line electrode is fixed by described high-field electrode set bolt, and the other end of described high-field electrode lead-in wire is drawn by described first through hole; And using the high voltage pulse input as described nonequilibrium plasma generation device after the connection of each high-field electrode lead-in wire; Described low-field electrode unit is arranged on the lower surface of described low-field electrode insulation cover plate, and described low-field electrode unit comprises the low-voltage line electrode of multiple uniform array arrangement; Described low-field electrode insulation cover plate is provided with the second through hole of multiple uniform array arrangement; One end that one end of each low-voltage line electrode and described low-field electrode go between is fixed; The other end of described low-voltage line electrode is fixed by described low-field electrode set bolt, and the other end of described low-field electrode lead-in wire is drawn by described second through hole; And ground connection after each low-field electrode lead-in wire is connected.
Wherein, described high-voltage line electrode is identical with the structure of described low-voltage line electrode, and the diameter of described high-voltage line electrode is 0.2mm to 1mm; The length of described high-voltage line electrode is 10cm to 200cm.
Wherein, the vertical interval of described high-voltage line electrode and low-voltage line electrode is 2cm to 8cm, and the level interval of each high-voltage line electrode in described high-field electrode unit is 5cm to 15cm.
Wherein, the repetition rate of the nanosecond pulse of the high voltage pulse input reception of described nonequilibrium plasma generation device is 100Hz to 1000Hz, and voltage magnitude is 50kV to 150kV, and the rising time of single high-voltage pulse is 30ns.
Wherein, the mesh diameter of described gauze screen is 0.5mm.
Present invention also offers a kind of particulate powder surface modification treatment system, comprise nonequilibrium plasma generation device, pulse generator and storage cage, described pulse generator is connected by the high voltage pulse input of high-voltage conducting wires with described nonequilibrium plasma generation device; Described storage cage is for collecting processed particle; Described nonequilibrium plasma generation device is above-mentioned nonequilibrium plasma generation device.
The present invention can bring following technique effect:
(1) have employed nonequilibrium plasma in the repetitive frequency pulsed Direct driver atmosphere air of high-voltage nanosecond, experimental result shows, compared to dielectric barrier discharge and corona discharge, in this discharge type, discharge peak currents density is larger, the efficiency producing active particle is better, and the non-equilibrium property of plasma is also higher.
(2) linear array electrode can have different length and quantity, can increase the volume of atmospheric pressure nonequilibrium plasma distribution in electric discharge, thus allows air ionization district be filled in whole electric discharge device, improves the utilization ratio of pulse power energy.
(3) under linear array electrode is arranged at open ambient air environment, do not need complicated dielectric impedance insulating barrier, abandoned expensive and loaded down with trivial details vacuum, gas charging system, easily constructed compact conformation, lightweight, volume is little, the nonequilibrium plasma generation device of stable performance.Thus making its use restriction less, application cost reduces greatly.
Accompanying drawing explanation
Fig. 1 is nonequilibrium plasma generation device of the present invention and particulate powder surface modification treatment system schematic.
Fig. 2 is the front schematic view of nonequilibrium plasma generation device of the present invention.
Fig. 3 is the reverse side schematic diagram of nonequilibrium plasma generation device of the present invention.
In all of the figs, identical Reference numeral is used for representing identical element or structure, wherein:
1 is nonequilibrium plasma generation device, and 101 is high-voltage line electrode; 102 is low-voltage line electrode; 103 is high-field electrode lead-in wire; 104 is low-field electrode lead-in wire; 105 is high voltage electrode insulation cover plate; 106 is low-field electrode insulation cover plate; 107 is the first through hole; 108 is the second through hole; 109 is plasma generating area; 110 is left side gauze screen; 111 is right side gauze screen; 112 is side insulation cover plate; 113 is high-field electrode set bolt; 114 is low-field electrode set bolt; 2 is pulse generator; 3 is pending particle; 4 is processed particle; 5 is storage cage; 51 is half opening insulation booth; 52 is electrostatic screen plate.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
The nonequilibrium plasma generation device 1 that the embodiment of the present invention provides can be applied to the surface modification treatment of material, the sterilizing etc. of medical instruments and equipment.Fig. 1 shows the structure of this nonequilibrium plasma generation device 1, for convenience of explanation, illustrate only the part relevant to the embodiment of the present invention, and existing details are as follows:
Nonequilibrium plasma generation device 1 comprises cavity, gauze screen and the high-field electrode unit that is arranged in cavity and low-field electrode unit; Wherein cavity can be cuboid cavity; Two surfaces relative in cuboid cavity are respectively high voltage electrode insulation cover plate 105 and low-field electrode insulation cover plate 106; Two sides relative in cuboid cavity are gauze screen 110,111; In cuboid cavity, two other relative side is sealed insulation plate 112.
High-field electrode unit is arranged on the lower surface of high voltage electrode insulation cover plate 105, and high-field electrode unit comprises the high-voltage line electrode 101 of multiple uniform array arrangement; High voltage electrode insulation cover plate 105 is provided with the first through hole 107 of multiple uniform array arrangement; One end of each high-voltage line electrode 101 and high-field electrode go between 103 one end fix; The other end of high-voltage line electrode 101 is fixed by high-field electrode set bolt 113, and the other end of high-field electrode lead-in wire 103 is drawn by the first through hole 107; And using the high voltage pulse input as nonequilibrium plasma generation device 1 after each high-field electrode lead-in wire 103 connection.
Low-field electrode unit is arranged on the lower surface of low-field electrode insulation cover plate 106, and low-field electrode unit comprises the low-voltage line electrode 102 of multiple uniform array arrangement; Low-field electrode insulation cover plate 106 is provided with the second through hole 108 of multiple uniform array arrangement; One end of each low-voltage line electrode 102 and low-field electrode go between 104 one end fix; The other end of low-voltage line electrode 102 is fixed by low-field electrode set bolt 114, and the other end of low-field electrode lead-in wire 104 is drawn by the second through hole 108; And ground connection after each low-field electrode lead-in wire 103 is connected.
In embodiments of the present invention, high-field electrode lead-in wire 103 goes between with low-field electrode 104 can not be arranged on same plane, to avoid the Electric Field Distribution between the electric field influence that formed between contact conductor to line electrode, thus the generation region of nonequilibrium plasma is caused to concentrate on the side of device; Go between high-field electrode lead-in wire 103 and low-field electrode 104 both sides being separately positioned on high voltage electrode insulation cover plate 105 and 106.
In real work, the nanosecond pulse of high pressure repetition rate is applied to the two ends of high and low pressure contact conductor 103,104, thus forms severe non-uniform electric field between high and low linear array electrode, and this pole non-uniform field makes air discharge.Along with the change of the distance between high and low linear array electrode, the form of electric discharge also will change.Suitably choose the distance between high and low linear array electrode, the disperse shape glow discharge between sparkover and corona discharge can be obtained.The atmospheric non-equilibrium plasma that the glow discharge of disperse shape produces evenly is being distributed between high and low linear array electrode.
In general, the above technical scheme conceived by the present invention compared with prior art, can obtain following advantage:
(1) this device have employed the method for nonequilibrium plasma in the repetitive frequency pulsed Direct driver atmosphere air of high-voltage nanosecond, experimental result shows, compared to dielectric barrier discharge and corona discharge, in this discharge type, discharge peak currents density is larger, the efficiency producing active particle is better, and the non-equilibrium property of plasma is also higher.
(2) in this device, linear array electrode can have different length and quantity, can increase the volume of atmospheric pressure nonequilibrium plasma distribution in electric discharge, thus allows air ionization district be filled in whole electric discharge device, improves the utilization ratio of pulse power energy.
(3) in this device, under linear array electrode is arranged at open ambient air environment, do not need complicated dielectric impedance insulating barrier, abandoned expensive and loaded down with trivial details vacuum, gas charging system, easily constructed compact conformation, lightweight, volume is little, the nonequilibrium plasma generation device of stable performance.Thus making its use restriction less, application cost reduces greatly.
In embodiments of the present invention, high-voltage line electrode 101 and low-voltage line electrode 102 all can adopt wire electrode, the main cause of line electrode is adopted to be that the radius of curvature of line electrode is little, more easily form severe non-uniform electric field in-between the electrodes, and severe non-uniform electric field is the necessary condition producing atmospheric non-equilibrium plasma.High-voltage line electrode 101 and low-voltage line electrode 102 can adopt and be made by the conductor such as copper, aluminium, graphite, and the technique making electrode belongs to the known technology that those skilled in the art can be known, does not repeat them here.
In embodiments of the present invention, left and right side gauze screen and high and low pressure electrode set bolt are insulating material and make, and gauze screen mesh diameter is taken as 0.5mm.The filtering major diameter magazine particle that act as of gauze screen enters nonequilibrium plasma generation device 1, and ensure that the internal work condition of nonequilibrium plasma generation device 1 remains atmospheric air condition, abandon expensive and loaded down with trivial details vacuum, gas charging system, make the service condition of device unrestricted.
In embodiments of the present invention, the diameter of high-voltage line electrode 101 and low-voltage line electrode 102 can elect 0.2mm to 1mm as.The length adjusting range of high-voltage line electrode 101 and low-voltage line electrode 102 can between 10cm to 200cm.The setting of high and low pressure line electrode 101,102 diameter and length is mainly to be formed between electrode for the purpose of severe non-uniform electric field, and this is also one of necessary condition that in air, nonequilibrium plasma produces.
Wherein, the vertical interval of high-voltage line electrode 101 and low-voltage line electrode 102 can between 2cm to 8cm, and the level interval of each high-voltage line electrode 101 in high-field electrode unit can between 5cm to 15cm.In low-field electrode unit, the setting of each low-voltage line electrode 102 arranges identical with the electrode in high-field electrode unit.Arranging of high and low pressure line electrode 101,102 vertical interval and level interval is to be formed between electrode for the purpose of severe non-uniform electric field equally, experiment finds, along with the reduction of electrode vertical spacing, electric discharge is developed to thread sparkover form by the glow discharge of disperse shape, and along with the increase of electrode vertical spacing, discharge and to be developed to faint corona discharge by the glow discharge of disperse shape.Equally, along with the reduction of electrode level interval, discharge and to be developed to thread sparkover form by the glow discharge of disperse shape, and along with the increase of electrode level interval, discharge by large volume disperse shape glow discharge to separately independently the glow discharge of disperse shape develop.
In embodiments of the present invention, the repetition rate of the nanosecond pulse of the high voltage pulse input reception of nonequilibrium plasma generation device 1 is in 100Hz to 1000Hz, and voltage magnitude is in 50kV to 150kV, and the rising time of single high-voltage pulse is 30ns.The amplitude of high voltage pulse and the selection of rising edge are to be formed between electrode for the purpose of severe non-uniform electric field equally, and this is also the necessary condition that in air, nonequilibrium plasma produces.Experiment finds, along with the reduction of the rising time of high-voltage pulse, electric discharge develops into the disperse shape glow discharge that can produce nonequilibrium plasma by thread sparkover form, and the amplitude of nanosecond pulse is larger, frequency is higher, the strength of discharge of glow discharge is larger, and progressively makes electric discharge be developed to thread sparkover form by the glow discharge of disperse shape.
In order to the nonequilibrium plasma generation device 1 that the further description embodiment of the present invention provides, now in conjunction with instantiation, details are as follows:
In practice process, by regulating the amplitude of high-voltage nanosecond pulse, rising time and repetition rate, and regulate material, diameter, length, level interval, vertical interval, the line electrode quantity of linear array electrode, design and complete a large amount of discharge tests, obtain the example experience obtaining large volume diffuse discharge in a large number, concrete example is as follows.
The present embodiment is a kind ofly produce in air that non-equilibrium plasma is for the device of particulate powder surface modification treatment, and its topology layout schematic diagram as shown in Figure 1, Figure 2, Figure 3 shows.High-voltage line electrode 101 and low-voltage line electrode 102 are the graphite silk of diameter 0.8mm, length 100cm, and the quantity of high and low pressure linear array electrode wires is respectively 6, and the interelectrode vertical interval of linear array is 4cm, and level interval is 12cm.The high voltage pulse input input pulse amplitude of nonequilibrium plasma generation device 1 is 120kV, and rising time is 30ns, and repetition rate is 500Hz, and pending particle 4 is nano carbon black.Produce large volume diffuse discharge plasma in experiment, and nano carbon black material properties is improved after treatment.
In the nonequilibrium plasma generation device 1 that the embodiment of the present invention provides, the instantiation of parameters refers to following table:
Table 1
The nonequilibrium plasma generation device 1 that the embodiment of the present invention provides can be applied in particulate powder surface modification treatment system, as shown in Figure 1, particulate powder surface modification treatment system comprises nonequilibrium plasma generation device 1, pulse generator 2 and storage cage 5; Wherein pulse generator 2 is connected with the high voltage pulse input of nonequilibrium plasma generation device 1 by high-voltage conducting wires; Pending particle 3 by hair-dryer by it through being blown in nonequilibrium plasma generation device after the gauze screen of left side, enter plasma generating area, particulate powder material is after plasma surface modification process, and processed particle 4 enters storage cage 5 through right side gauze screen 111 under the wind-force of hair-dryer.Finally, processed particle 4, under the effect of surface electrostatic absorption affinity, under being deposited on electrostatic screen plate, thus completes the collection of particle powder material.
Wherein, nonequilibrium plasma generation device 1 comprises high-voltage line electrode 101, low-voltage line electrode 102, high-field electrode lead-in wire 103, low-field electrode lead-in wire 104, high voltage electrode insulation cover plate 105, low-field electrode insulation cover plate 106, first through hole 107, second through hole 108, plasma generating area 109, left side gauze screen 110, right side gauze screen 111, side insulation cover plate 112, high-field electrode set bolt 113, low-field electrode set bolt 114.
Storage cage 5 comprises half opening insulation booth 51 and electrostatic screen plate 52.
Nonequilibrium plasma generation device 1 is cuboid-type nonequilibrium plasma generation device, and the structural design of whole generator and arrangement are front-rear center symmetrical expression.The upper and lower surface of nonequilibrium plasma generation device 1 is made up of high voltage electrode insulation cover plate 105 and low-field electrode insulation cover plate 106.High-voltage line electrode 101 is placed in the lower surface of high voltage electrode insulation cover plate 105, and low-voltage line electrode 102 is placed in the upper surface of high voltage electrode insulation cover plate 106.First through hole 107 is positioned at one end of high voltage electrode insulation cover plate 105, and the second through hole 108 is positioned at one end of low-field electrode insulation cover plate 106.High-field electrode lead-in wire 103 is drawn downwards by the first through hole 107, and low-field electrode lead-in wire 104 is upwards drawn by the second through hole 108.One end of high-voltage line electrode 101 by the mode that is wound around and high-field electrode go between 103 lower end fix, and obtain reliable electric connection; The other end of high-voltage line electrode 101 is then fixed by high-field electrode set bolt 113.Same, one end of low-voltage line electrode 102 by the mode that is wound around and high-field electrode go between 104 upper end fix, and obtain reliable electric connection; The other end of low-voltage line electrode 102 is then fixed by low-field electrode set bolt 114.The electric field between linear array electrode is caused to produce distortion for avoiding the electric field between high and low pressure contact conductor, high-voltage line electrode 101 and low-voltage line electrode 102 are not taken on same vertical plane with the link gone between separately, but are separately fixed at the rear and front end of nonequilibrium plasma generation device 1.Meanwhile, high-voltage line electrode 101 and being fixedly between low-voltage line electrode 102 and high and low pressure insulation cover plate removably connect, and change to facilitate electrode in actual applications.
Plasma generating area 109 is between high-voltage line electrode 101 and low-voltage line electrode 102.The left and right sides of nonequilibrium plasma generation device 1 is respectively left side gauze screen 110 and right side gauze screen 111, before and after both sides be side insulation cover plate 112, this three and high voltage electrode insulation cover plate 105 and low-field electrode insulation cover plate 106 together constitute second case type plasma generation cavity of atmospheric pressure.
In the present invention, high-voltage line electrode 101 and low-voltage line electrode 102 are conductive filament, can be made by the metallic conductor such as copper, aluminium, also can be made by non-metal conductors such as graphite.The quantity of high-voltage line electrode 101 and low-voltage line electrode 102 is adjustable, specifically can regulate between 1 to 20.The diameter of high-voltage line electrode 101 and low-voltage line electrode 102 is between 0.2mm to 1mm.The length of high-voltage line electrode 101 and low-voltage line electrode 102 is also adjustable, concrete adjustable range at 10cm between 200cm.The non-equilibrium hot plasma of diffuse discharge only can produce under the condition of severe non-uniform electric field, and Given this, the vertical interval of high-voltage line electrode 101 and low-voltage line electrode 102 is taken between 2cm to 8cm, and level interval is taken between 5cm to 15cm.
High voltage electrode insulation cover plate 105, low-field electrode insulation cover plate 106 and side insulation cover plate 112 are made up of the material of high insulating property, can select the material such as polymethyl methacrylate, epoxy resin.
High-field electrode lead-in wire 103, low-field electrode lead-in wire 104 can be made up of the electric conducting material such as copper conductor, aluminum conductor, and diameter is taken as 0.8mm.First through hole 107, second through hole 108 is round through hole, and diameter is taken as 1mm.
Left side gauze screen 110 and right side gauze screen 111 are insulating material and make, and gauze screen mesh diameter is taken as 0.5mm, enters nonequilibrium plasma generation device 1 with filtering major diameter magazine particle.Described high-field electrode set bolt 113 and low-field electrode set bolt 114 are made up of insulating material equally.In discharge process, plasma generating area 109 is rendered as large volume spatial dispersion shape electric discharge state.
Pulse generator 2 is connected to nonequilibrium plasma generation device 1 by high-voltage conducting wires.Pending particle 3 can be the organic granular sprills such as nano carbon black, PET film material, and processed particle 4 is the organic granular sprills such as nano carbon black, PET film material after plasma surface modification process.Storage cage 5 is a half-open shape of the mouth as one speaks cube boxes.Half opening insulation booth 51 is made up of insulating material, with the impact preventing plasma from producing region electric field, can select the material such as polymethyl methacrylate, epoxy resin; Electrostatic screen plate 52 is made up of conductive metal material, can select the materials such as copper, iron, aluminium.
In running work, pulse generator 2 provides the high-voltage nanosecond pulse of repetition rate needed for diffuse discharge for the high-low pressure linear array electrode two ends in nonequilibrium plasma generation device 1, execute pulse repetition rate can regulate in 100Hz to 1000Hz, voltage magnitude can regulate in 50kV to 150kV, the rising time of single high-voltage pulse, in nanosecond, specifically can be 30ns.After high-voltage nanosecond pulse is applied to linear array electrode two ends, create the non-equilibrium hot plasma of diffuse discharge of large volume under atmospheric air condition in the central area of nonequilibrium plasma generation device.Pending particle 3 by hair-dryer by it through being blown in nonequilibrium plasma generation device 1 after left side gauze screen 110, enter plasma generating area 109, particulate powder material is after plasma surface modification process, and processed particle 4 enters storage cage 5 through right side gauze screen 111 under the wind-force of hair-dryer.Finally, processed particle 4, under the effect of surface electrostatic absorption affinity, is deposited on electrostatic screen plate 52 times, thus completes the collection of particle powder material.
Under atmospheric air environment, gas discharge more often shows as the electric discharge of flame path type and corona discharge.Diffusion-type glow discharge is a kind of special electric discharge form between sparkover and corona discharge.The nonthermal plasma that diffuse discharge produces is a kind of partially ionized low temperature plasma, and its electronics and ion temperature differ greatly.Nonequilibrium plasma concentrates on the process to macroscopical finished products such as films mostly to the process of material, and compared with film or similar material, the contact area of particulate powder material and gas is much bigger.Therefore, the configuration of surface of powder and structure after plasma treatment, even all likely there is marked change in particle size.
In general, the above technical scheme conceived by the present invention compared with prior art, can obtain following advantage:
(1) the particulate powder surface modification treatment system that the present invention introduces can produce large volume nonequilibrium plasma, thus increase the contact area of particulate powder and plasma, make the process of particulate powder material surface modifying can carry out more abundant, substantially increase the efficiency of powder surface modifications process.
(2), in this system, powdery granule surface modification treatment, all under ambient air environment, does not need complicated dielectric impedance insulating barrier, avoids in surface modification treatment process medium barrier layer material the pollution of particle.
(3) this system has abandoned expensive and loaded down with trivial details vacuum, gas charging system, easily constructs compact conformation, lightweight, volume is little, the apparatus system of stable performance.Thus it is less to make the use of this system limit, the industrial applications for plasma is significant.
Those skilled in the art will readily understand; the foregoing is only preferred embodiment of the present invention; not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. a particulate powder surface modification treatment system, comprise nonequilibrium plasma generation device (1), pulse generator (2) and storage cage (5), described pulse generator (2) is connected by the high voltage pulse input of high-voltage conducting wires with described nonequilibrium plasma generation device (1); Described storage cage (5) is for collecting processed particle (4); It is characterized in that, described nonequilibrium plasma generation device (1) comprises cavity, gauze screen and the high-field electrode unit that is arranged in cavity and low-field electrode unit;
Two surfaces relative in described cavity are as high voltage electrode insulation cover plate (105) and low-field electrode insulation cover plate (106), two relative sides are as gauze screen (110,111), and two other relative side is as sealed insulation plate (112);
Described high-field electrode unit is arranged on the lower surface of described high voltage electrode insulation cover plate (105), described high-field electrode unit comprises the high-voltage line electrode (101) of multiple uniform array arrangement, and described high voltage electrode insulation cover plate (105) is provided with first through hole (107) of multiple uniform array arrangement; The go between one end of (103) of one end of each high-voltage line electrode (101) and described high-field electrode is fixed; The other end of described high-voltage line electrode (101) is fixed by described high-field electrode set bolt (113), and the other end of described high-field electrode lead-in wire (103) is drawn by described first through hole (107); And using the high voltage pulse input as described nonequilibrium plasma generation device after each high-field electrode lead-in wire (103) connection;
Described low-field electrode unit is arranged on the lower surface of described low-field electrode insulation cover plate (106), and described low-field electrode unit comprises the low-voltage line electrode (102) of multiple uniform array arrangement; Described low-field electrode insulation cover plate (106) is provided with second through hole (108) of multiple uniform array arrangement; The go between one end of (104) of one end of each low-voltage line electrode (102) and described low-field electrode is fixed; The other end of described low-voltage line electrode (102) is fixed by described low-field electrode set bolt (114), and the other end of described low-field electrode lead-in wire (104) is drawn by described second through hole (108); And ground connection after each low-field electrode lead-in wire (103) is connected.
2. particulate powder surface modification treatment system as claimed in claim 1, it is characterized in that, described high-voltage line electrode (101) is identical with the structure of described low-voltage line electrode (102), and the diameter of described high-voltage line electrode (101) is 0.2mm to 1mm; The length of described high-voltage line electrode (101) is 10cm to 200cm.
3. particulate powder surface modification treatment system as claimed in claim 1 or 2, it is characterized in that, the vertical interval of described high-voltage line electrode (101) and low-voltage line electrode (102) is 2cm to 8cm, and the level interval of each high-voltage line electrode (101) in high-field electrode unit is 5cm to 15cm.
4. particulate powder surface modification treatment system as claimed in claim 3, it is characterized in that, the repetition rate of the nanosecond pulse of the high voltage pulse input reception of described nonequilibrium plasma generation device is 100Hz to 1000Hz, voltage magnitude is 50kV to 150kV, and the rising time of single high-voltage pulse is 30ns.
5. particulate powder surface modification treatment system as claimed in claim 3, it is characterized in that, the mesh diameter of described gauze screen (110,111) is 0.5mm.
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| CN103458600A (en) * | 2013-07-31 | 2013-12-18 | 华中科技大学 | System producing atmospheric pressure dispersion discharging non-equilibrium plasma |
-
2014
- 2014-03-13 CN CN201410091619.8A patent/CN103826379B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050006095A (en) * | 2004-11-26 | 2005-01-15 | 송석균 | High pressure plasma discharge device |
| CN102752950A (en) * | 2011-04-22 | 2012-10-24 | 苏州市奥普斯等离子体科技有限公司 | Surface treatment method of low temperature plasma of granular material and device thereof |
| CN103458600A (en) * | 2013-07-31 | 2013-12-18 | 华中科技大学 | System producing atmospheric pressure dispersion discharging non-equilibrium plasma |
Non-Patent Citations (2)
| Title |
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| Design and Construction Compact Repetitive Nanosecond Pulse Generator Based on Tesla Transformer;刘云龙等;《高电压技术》;20130930;第39卷(第9期);全文 * |
| 利用重复频率纳秒脉冲和线电极产生常温常压下的大气压弥散放电;李黎等;《中国电机工程学报》;20140125;第34卷(第3期);摘要、图1，6-8、第462页第2段，第463页第4段-第464页第3段 * |
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| CN103826379A (en) | 2014-05-28 |
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