WO2018205758A1 - 一种网孔形沿面放电等离子体产生氧活性物质的装置 - Google Patents

一种网孔形沿面放电等离子体产生氧活性物质的装置 Download PDF

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WO2018205758A1
WO2018205758A1 PCT/CN2018/080452 CN2018080452W WO2018205758A1 WO 2018205758 A1 WO2018205758 A1 WO 2018205758A1 CN 2018080452 W CN2018080452 W CN 2018080452W WO 2018205758 A1 WO2018205758 A1 WO 2018205758A1
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Prior art keywords
mesh
discharge plasma
high voltage
discharge
tube
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English (en)
French (fr)
Inventor
赵红
李�杰
韩长民
郭贺
陈超
吴彦
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WUHAN KAIDI ELECTRIC POWER ENVIRONMENTAL CO Ltd
Dalian University of Technology
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WUHAN KAIDI ELECTRIC POWER ENVIRONMENTAL CO Ltd
Dalian University of Technology
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
    • B01J19/087—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electric or magnetic energy
    • B01J19/088—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electric or magnetic energy giving rise to electric discharges
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H1/00—Generating plasma; Handling plasma
    • H05H1/24—Generating plasma
    • H05H1/2406—Generating plasma using dielectric barrier discharges, i.e. with a dielectric interposed between the electrodes
    • H05H1/2439—Surface discharges, e.g. air flow control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
    • B01J2219/0873—Materials to be treated
    • B01J2219/0875—Gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
    • B01J2219/0894—Processes carried out in the presence of a plasma

Definitions

  • the invention belongs to the technical field of plasma application, and in particular relates to a device for generating an oxygen active substance by a mesh-shaped surface discharge plasma.
  • a plasma is a type of conductive fluid composed of electrons, ions, radicals, and neutral substances.
  • Oxygen active substances (O 3 , ⁇ OH, ⁇ O, H 2 O 2 , etc.) formed during the formation process have strong oxidizing properties and can be rapidly or efficiently oxidized directly or indirectly with compounds in the gas phase or liquid phase.
  • the reaction process which is difficult to achieve by conventional methods, has a good application prospect in the fields of materials, energy, environment and chemical industry.
  • Dielectric barrier discharge is one of the effective methods for generating low temperature plasma in atmospheric pressure environment. It has the advantages of high electron energy, high electron density and high application effect, and is widely favored by plasma technology users.
  • the dielectric barrier discharge is to place an insulating medium between the two metal conductor electrodes, which suppresses the transition of the spark discharge to the arc discharge, and is easy to form a stable streamer discharge, so it is called a dielectric barrier discharge.
  • the metal conductor electrode and the insulating medium it is divided into three types of structure: surface discharge, body discharge (including plate-plate type, wire-tube type, tube-tube type, needle-plate type) and packed bed.
  • the AC system is powered by an AC, pulse or high frequency power supply to produce a low temperature plasma.
  • the dielectric barrier discharge plasma electrode system in the form of a bulk discharge is composed of a metal conductor electrode, an insulating medium, an air gap space, and a metal conductor electrode.
  • the air gap spacing in the electrode system is small on the order of millimeters, the electric field strength between the air gaps is large, and the discharge wind force and the total amount of active materials are generated when the gas passes through the gap, thereby being applied in related aspects.
  • the air gap is small, the gas resistance is large and it is difficult to act on the atmosphere.
  • a packed bed dielectric barrier discharge plasma electrode system is a ball of insulating medium having a diameter of less than a millimeter between two metal electrodes.
  • the insulating medium particle ball When a voltage is applied between the metal conductor electrodes, the insulating medium particle ball is subjected to an electric field. Polarization, and the adjacent surfaces of two adjacent particle spheres will polarize charges of opposite polarity, forming a strong electric field between adjacent two particle spheres to initiate discharge.
  • the packed bed dielectric barrier discharge plasma electrode system also has a problem of large gas resistance.
  • the edge-type dielectric barrier discharge plasma electrode system places two metal conductor electrodes on the dielectric dielectric wall.
  • the insulating medium around the metal conductor electrodes is polarized to generate metal conductor electrodes.
  • the opposite polarity of the charge such that the metal conductor electrode and the dielectric dielectric polarization charge form a strong electric field to initiate the discharge, adjust the electrode length to adjust the contact area of the electrode with the insulating medium, thereby adjusting the discharge plasma area or region.
  • the gas is subjected to plasma on the walls of the dielectric, so the surface dielectric barrier discharge plasma electrode system can reduce the gas resistance of the electrode system by increasing the spacing of adjacent insulating media (plate-to-plate spacing or tube diameter).
  • the surface discharge type dielectric barrier discharge plasma generates an active material for oxidizing the desulfurization slurry of the coal-fired flue gas, and the effect of reducing the amount of the oxidizing air by one time is obtained.
  • the creeping dielectric barrier plasma region is positively correlated with the length of the metal conductor electrode placed on the surface of the insulating medium, that is, the metal conductor electrode has a large length and the plasma region is large, and the metal conductor electrode of the creeping discharge plasma electrode system in the form of a spiral ring
  • the line is limited by the surface parameters of the insulating medium in terms of increasing length, thereby resulting in a limited area of the surface discharge plasma.
  • the present invention provides a mesh-shaped creeping discharge plasma generation method for the technical problems of large dielectric barrier discharge plasma gas resistance and limited spiral discharge surface plasma area in the prior art.
  • a device for generating an oxygen active material in a mesh-shaped surface discharge plasma comprising a mesh-shaped creeping discharge plasma reactor for supplying oxygen-containing gas to the mesh-shaped surface discharge plasma reactor a body generator and a power source for supplying power to the mesh-shaped surface discharge plasma reactor to generate a plasma; wherein the mesh-shaped creeping discharge plasma reactor comprises at least one mesh-shaped creeping discharge plasma module
  • the mesh-shaped creeping discharge plasma module includes an array discharge electrode system or a tubular discharge electrode system having a high voltage wiring electrode and a low voltage wiring electrode;
  • the array discharge electrode system is disposed in a sealed box, and the array discharge electrode system comprises an insulating bracket and a plurality of sets of discharge boards fixedly mounted on the insulating bracket at equal intervals, each set of discharge boards comprising an insulating medium sheet, a first metal plate tightly mounted on one side of the insulating medium sheet and a second metal plate tightly mounted on the other side of the insulating medium sheet, the first metal plate being uniformly provided with a first mesh, all of which are a metal plate and a second metal plate are respectively connected by wires to form two wiring electrodes of the array discharge electrode system;
  • the tubular discharge electrode system comprises a mother tube, a uniform flange disposed at two ends of the mother tube, and a plurality of sets of electrode tubes installed on the uniform flange in an array form at both ends through the mother tube.
  • Each set of electrode tubes includes a first metal tube, an insulating medium tube closely placed in the first metal tube, and a second metal tube closely placed on the inner wall of the insulating medium tube, the second metal tube is evenly opened The second mesh, all the first metal tubes and the second metal tubes are respectively connected by wires to form two wiring electrodes of the tubular discharge electrode system.
  • the first metal plate is used as a high voltage wiring electrode, and the second metal plate is used as a low voltage wiring electrode; in the tubular discharge electrode system, the second metal tube is used as A high voltage wiring electrode, the first metal tube serving as a low voltage wiring electrode.
  • the shapes of the first mesh and the second mesh are rectangular, circular, triangular or polygonal.
  • the first metal plate and the second metal pipe have a thickness of 0.1 mm to 5 mm, and the first mesh and the second mesh have a diameter of 1 mm to 10 mm, adjacent to the first mesh edge.
  • the spacing between the adjacent second mesh edges is 0.1 mm to 50 mm.
  • the mesh-shaped creeping discharge plasma module further comprises a high voltage insulator and a low voltage insulator, and one end of the high voltage insulator is connected to the high voltage wiring electrode of the array discharge electrode system or the tubular discharge electrode system, and the other end thereof Connected to the high voltage output of the power supply, one end of the low voltage insulator is connected to the low voltage wiring electrode of the array discharge electrode system or the tubular discharge electrode system, and the other end is connected to the low voltage output end of the power source.
  • the mesh-shaped creeping discharge plasma module further includes an air inlet head and an air outlet head disposed at two ends of the sealed box body or two uniform flanges, and the air inlet head and the oxygen-containing gas are generated.
  • the gas outlet is connected to a microporous aerator, and the microporous aerator is disposed in a container.
  • the insulating medium of the insulating medium sheet and the insulating medium tube is quartz glass, ceramic, mica or polyethylene.
  • the mesh-shaped creeping discharge plasma reactor comprises a plurality of mesh-shaped creeping surface discharge plasma modules composed of a series and a parallel.
  • the power source is one or more.
  • the power source is a pulsed high voltage, a sinusoidal waveform high voltage, a triangular wave waveform high voltage or a square wave waveform high voltage AC high voltage power source, and the alternating high voltage power source has a frequency of 50 Hz-20 kHz.
  • the present invention has the following beneficial effects: by providing a first metal plate or a second metal tube having a mesh as a high voltage wiring electrode or a low voltage wiring electrode, it is possible to generate a creeping discharge plasma region under the same insulating medium size, thereby The plasma space volume is saved; in addition, the device uses a mesh-shaped creeping-discharge plasma reactor with low gas resistance, which is suitable for discharge activation treatment of large flow air or oxygen.
  • FIG. 1 is a schematic structural view of Embodiment 1 of the present invention.
  • FIG. 2 is a schematic structural view of an array discharge electrode system according to Embodiment 1 of the present invention.
  • FIG. 3 is a schematic structural view of a tubular discharge electrode system according to Embodiment 2 of the present invention.
  • Fig. 4 is a view showing an application effect of the present invention.
  • 1- sealed box 2-mesh-shaped creeping plasma reactor; 3-power supply; 4-oxygen gas generator; 5-flow meter; 6-container; 7-wire; 8-silicone rubber Tube; 9-microporous aerator; 10-intake head; 11-outlet head; 12-high voltage insulator; 13-low voltage insulator; 14-first metal plate; 15--insulating medium sheet; 16-second metal plate ; 17-insulated bracket; 18-mother tube; 19-electrode tube; 20-uniform flange.
  • a device for generating an oxygen active material in a mesh-shaped surface discharge plasma comprising a mesh-shaped creeping discharge plasma reactor 2
  • An oxygen-containing gas generator 4 for oxygen-containing gas is supplied to the mesh-shaped creeping plasma reactor 2 (generally using an air compressor) and for supplying power to the mesh-shaped surface discharge plasma reactor 2 to generate plasma.
  • the module, the mesh-shaped creeping discharge plasma module comprises an array discharge electrode system or a tubular discharge electrode system having a high voltage wiring electrode and a low voltage wiring electrode;
  • the array discharge electrode system is placed in a sealed box 1.
  • the array discharge electrode system includes an insulating bracket 17 and a plurality of sets of discharge boards fixedly mounted on the insulating bracket 17 at equal intervals.
  • Each of the discharge plates includes an insulating medium sheet 15, a first metal plate 14 closely mounted on one side of the insulating medium sheet 15, and a second metal sheet 16 closely attached to the other side of the insulating medium sheet 15, on the first metal sheet 14. Uniformly opening the first mesh, all the first metal plate 14 and the second metal plate 16 are respectively connected by the wires 7, forming two wiring electrodes of the array discharge electrode system;
  • the tubular discharge electrode system includes a mother tube 18, a uniform flange 20 disposed at both ends of the mother tube 18, and a plurality of sets of both ends disposed in an array on the uniform flange 20 through the mother tube 18.
  • An electrode tube 19 each set of electrode tubes 19 includes a first metal tube, an insulating medium tube closely placed in the first metal tube, and a second metal tube closely placed on the inner wall of the insulating medium tube, and the second metal tube is evenly opened Two meshes, all of the first metal tube and the second metal tube are respectively connected by wires 7, forming two wiring electrodes of the tubular discharge electrode system.
  • the first metal plate serves as a high voltage wiring electrode and the second metal plate serves as a low voltage wiring electrode; in the tubular discharge electrode system, the second metal tube serves as a high voltage wiring The electrode, the first metal tube acts as a low voltage wiring electrode.
  • the first mesh and the second mesh are rectangular, circular, triangular or polygonal in shape.
  • the first metal plate 14 and the second metal tube have a thickness of 0.1 mm to 5 mm, and the first mesh and the second mesh have a diameter of 1 mm to 10 mm, adjacent to the first mesh.
  • the spacing of the edges and the spacing of the edges of the adjacent second meshes are both 0.1 mm to 50 mm, wherein the inner diameter of the second metal tube is 5 mm to 50 mm, and the spacing between the adjacent first metal plates 14 and the adjacent second metal tubes is 0.1mm-50mm.
  • the mesh-shaped creeping discharge plasma module further includes a high voltage insulator 12 and a low voltage insulator 13, one end of the high voltage insulator 12 and the array discharge electrode system or tube type.
  • the high-voltage wiring electrode of the discharge electrode system is connected, the other end of which is connected with the high-voltage output end of the power source 3, and one end of the low-voltage insulator 13 is connected with the low-voltage wiring electrode of the array discharge electrode system or the tubular discharge electrode system, and the other end thereof is connected with the power source 3
  • the low voltage output is connected.
  • the mesh-shaped creeping discharge plasma module further includes an intake head 10 disposed at both ends of the sealed casing 1 or on two uniform flanges 20.
  • the gas inlet head 11 is connected to the oxygen-containing gas generator 4, the gas outlet head 11 is connected to a microporous aerator 9, and the micro-hole aerator 9 is disposed in a container 6.
  • the insulating medium of the insulating medium sheet 15 and the insulating medium tube is quartz glass, ceramic, mica or polyethylene.
  • the mesh-shaped creeping discharge plasma reactor 2 comprises a plurality of mesh-shaped creeping surface discharge plasma modules consisting of series and parallel, by increasing the number of mesh-shaped creeping plasma modules to increase
  • the size of the gas flow rate of the apparatus for generating an oxygen active material in a mesh-shaped surface discharge plasma can also be achieved by increasing the size of the mesh-shaped creeping discharge plasma module.
  • one or more power sources may be used, and one power source may supply power to all modules, or all modules may be divided into groups. Powered by several power packs.
  • the power source 3 is an alternating current high voltage power source having a pulse waveform high voltage, a sinusoidal waveform high voltage, a triangular wave waveform high voltage or a square wave waveform high voltage, and the alternating high voltage power source has a frequency of 50 Hz to 20 kHz.
  • the mesh-shaped creeping discharge plasma module is formed into an array structure, and the electrode structure shape is divided into two types, that is, a flat plate type and a tubular type.
  • the following is a flat-type mesh-shaped creeping discharge plasma module and a tubular mesh-shaped creeping discharge plasma module.
  • the flat mesh-shaped creeping discharge plasma module comprises a sealed box 1 (the sealed box is a plexiglass box in the embodiment), an array discharge electrode system, a high voltage insulator 12, and a low voltage.
  • the insulator 13, the air inlet head 10, the air outlet head 11, and the like, the array type discharge electrode system comprises an insulating bracket 17, a plurality of first metal plates 14, and a plurality of insulating medium sheets 15 (the insulating medium sheets in the embodiment are quartz glass plates) and A plurality of second metal plates 16 are formed.
  • Assembling the array type discharge electrode system firstly, the first metal plate and the second metal plate are respectively tightly fixedly mounted on two sides of the insulating medium sheet to form a group of discharge plates, and secondly, a plurality of assembled discharge plates are assembled. The spacers are fixedly placed on the insulating bracket to form an array discharge electrode system, and finally the first metal plate or the second metal plate on the same side of each group of discharge plates is connected by wires to form two array discharge electrode systems.
  • Wiring electrodes one of which serves as a high voltage wiring electrode of the array discharge electrode system and the other as a low voltage wiring electrode of the array discharge electrode system;
  • the inlet head and the outlet head are respectively installed at the front and rear ends of the sealed box body, and are used as a gas inlet and a gas outlet of a device for generating an oxygen active material along the surface discharge plasma;
  • the tubular mesh-shaped creeping discharge plasma module comprises a mother tube 18, a plurality of sets of electrode tubes 19, two uniformly distributed arrays of symmetrically arranged arrays 20, high voltage insulators 12, and low voltage insulators 13
  • the air inlet head 10, the air outlet head 11 and the like, each set of electrode tubes is composed of a first metal tube, an insulating medium tube and a second metal tube (or a punched metal tube).
  • the uniform flange is installed at two ports on the mother tube
  • a plurality of first metal tubes are fixed in an array form on the uniform flanges at the two ports before and after the mother tube, and then the insulating medium tubes are closely placed on each of the first In a metal tube, finally the second metal tube is closely placed on the inner wall of the insulating medium tube;
  • This embodiment describes a device for generating an oxygen active material by a mesh-shaped creeping discharge plasma of a flat-plate mesh-shaped creeping discharge plasma module, which is used to oxidize a simulated slurry of a wet flue gas desulfurization of a coal-fired flue gas, such as
  • the apparatus comprises a plexiglass box, a mesh-shaped creeping plasma reactor, an alternating current high voltage power supply, an air compressor, a flow meter 5, a vessel 6, a wire 7, a silicone rubber tube 8, and a microporous aerator.
  • the mesh-shaped creeping discharge plasma reactor 2 is placed inside the plexiglass box, and the alternating high-voltage power source is connected to the mesh-shaped creeping discharge plasma reactor 2 through the wire 7, the high-voltage insulator 12 and the low-voltage insulator 13 to utilize
  • the silicone rubber tube 8 connects the air compressor 5 and the flow meter 5, the flow meter 5, the inlet head 10 on the mesh-shaped creeping discharge plasma reactor 2, and the gas outlet head 11 on the mesh-shaped creeping plasma reactor 2
  • the microporous aerators 9 and the like are connected to each other, and the microporous aerator 9 is placed in the container 6.
  • the mesh-shaped creeping discharge plasma reactor 2 includes a first metal plate (punched metal plate), a quartz glass plate, a second metal plate, and an insulating holder 17.
  • first metal plate punched metal plate
  • quartz glass plate a quartz glass plate
  • second metal plate a second metal plate
  • an insulating holder 17 a first metal plate (punched metal plate)
  • the first metal plate is placed as a high-voltage wire electrode on the upper surface of the quartz glass plate
  • the other second metal plate 16 is placed as a low-voltage wire electrode under the quartz glass plate, and then the first metal plate and the quartz glass are placed.
  • the discharge electrodes composed of the plate and the second metal plate are fixedly placed on the insulating holder 17, and finally placed in the plexiglass box.
  • the second metal plate as the high-voltage wiring electrode is a square aluminum foil with a thickness of 0.05 mm and a side length of 70 mm, the punching hole diameter is 6 mm, the distance between the hole and the edge of the hole is 3 mm; the quartz glass plate has a side length of 110 mm and a thickness of The square plate of 1.5 mm; the second metal plate 16 is a square stainless steel plate having a thickness of 2 mm and a side length of 70 mm; the insulating bracket 17 is made of a square cylinder; and the plexiglass sealing case 1 is a square body having a side length of 150 mm and a height of 10 mm.
  • a creeping discharge plasma is generated inside the electrode system of the mesh-shaped surface discharge plasma reactor, and the air blasted by the air compressor enters the plasma from the inlet of the mesh-shaped surface discharge plasma reactor.
  • oxygen-containing substances in the air including O 2 and H 2 O, etc.
  • oxygen-containing active substances including O 3 , O, ⁇ OH, etc.
  • the gas outlet head of the discharge plasma reactor is taken out and injected into the slurry of the vessel 6 containing the calcium sulfite solution through a microporous aerator to realize the oxidation application of calcium sulfite.
  • the application effect of the present invention is that the air compressor delivers a flow rate of 1 m 3 /h, the AC high voltage power supply peak voltage is 19 kV, 50 Hz, the initial concentration of the calcium sulfite slurry is 0.01 mol/L, and the initial pH value.
  • the oxidation rate of the present invention is 3.1 times that of the air self-oxidation rate, and when the oxidation time is 60 minutes, the plasma oxidation efficiency is 92.4%, which is much higher than the effect of the air self-oxidation efficiency of 52.3%. It can be seen that the oxidative treatment of the coal-fired flue gas wet desulfurization slurry with the invention has the advantages of high oxidation efficiency and high oxidation rate, and convenient operation.

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Abstract

一种网孔形沿面放电等离子体产生氧活性物质的装置，包括网孔形沿面放电等离子体反应器（2）、含氧气体发生器（4）以及电源（3），反应器（2）包括至少一个网孔形沿面放电等离子体模块，模块包括具有高压接线电极和低压接线电极的阵列式放电电极系统或管式放电电极系统；阵列式放电电极系统是由若干组放电板组成，每组放电板是由第一金属板（14）作为高压接线电极、第二金属板（16）作为低压接线电极组成；管式放电电极系统是由若干套电极管（19）组成，每套电极管（19）是由第二金属管作为高压接线电极、第一金属管作为低压接线电极组成。该装置可以有效解决体放电和填充床两种形式的介质阻挡放电等离子体气体阻力大的技术问题。

Description

一种网孔形沿面放电等离子体产生氧活性物质的装置 技术领域
本发明属于等离子体应用技术领域，具体涉及一种网孔形沿面放电等离子体产生氧活性物质的装置。
背景技术
等离子体是由电子、离子、自由基及中性物质等构成的一类导电性流体。其形成过程中生成的氧活性物质(O 3、·OH、·O、H 2O 2等)具有较强的氧化性，能够直接或者间接与气相或液相中的化合物发生快速、高效的氧化反应，实现常规方法难以实现的反应过程，在材料、能源、环境与化工等领域具有很好的应用前景。
介质阻挡放电是大气压环境下产生低温等离子体的有效方法之一，具有电子能量高和电子密度高，应用效果高等优点，受到等离子体技术应用者广泛青睐。介质阻挡放电是在两个金属导体电极之间放置绝缘介质，抑制了火花放电向弧光放电转变，易形成稳定的流光放电，故称为介质阻挡放电。按照金属导体电极和绝缘介质形状和放置方式分为沿面放电、体放电(包括板-板式、线-管式、管-管式、针-板式)和填充床等三种结构形式。采用交流、脉冲或高频电源给电极系统供电，产生低温等离子体。
体放电形式的介质阻挡放电等离子体电极系统是由金属导体电极、绝缘介质、气隙空间和金属导体电极构成的。如申请号为201610112218.5的中国发明专利申请公开的一种管形介质阻挡放电等离子体推进装置、申请号为200610104653.X的中国发明专利申请公开的一种介质阻挡放电产生的低温等离子体室内空气净化方法，由于电极系统中的气隙间距较小为毫米数量级，所以气隙间的电场强度较大，气体通过间隙时产生放电风力和活性物质总量较大，由此在相关方面得以应用。但是因为气隙间距较小，由此产生气体阻力大，难以作用于大气量的气体。填充床式介质阻挡放电等离子体电极系统是在两个金属电极之间放置直径毫米量级以下的绝缘介质颗粒球，当在金属导体电极之间施加电压时，绝缘介质颗粒球在电场作用下被极化，而且相邻两个颗粒球相近表面会极化出相反极性的电荷，在相邻两个颗粒球间形成强电场引发放电。填充床式介质阻挡放电等离子体电极系统，同样存在气体阻力大的问题。
沿面式介质阻挡放电等离子体电极系统是将两个金属导体电极放置于在绝缘介质壁上，当在金属导体电极之间施加电压时，金属导体电极周围的绝缘介质被极化产生与金属导体电极极性相反的电荷，这样金属导体电极和绝缘介质极化电荷形成强电场引发放电，通过调整电极长度调节电极与绝缘介质接触面积，进而调节放电等离子体面积或区域。气体是受绝缘介质壁上的等离子体作用，因此沿面式介质阻挡放电等离子体电极系统可以通过增加相邻绝 缘介质间距(板-板间距或管的直径)，降低电极系统对气体阻力。如公开号CN103768902A公开的一种湿法烟气脱硫工艺中亚硫酸盐浆液氧化方法及其设备和公告号CN203790808U公开的一种湿法烟气脱硫工艺中亚硫酸盐浆液氧化设备，采用螺环型沿面放电式介质阻挡放电等离子体产生活性物质用于氧化燃煤烟气的脱硫浆液，取得了降低氧化空气量1倍的效果。对比文件【张颖等，沿面型介质阻挡放电中高压电极配置对放电特性及臭氧产量的影响，高电压技术，2015年第41卷、第2期、第539-546页】和【岳帅，沿面介质阻挡放电装置结构优化及供电研究，大连理工大学硕士论文，第16页】进一步研究了螺环沿面放电式介质阻挡等离子体电极结构配置方法，包括螺环线径、螺距、螺环线材料等，对螺环沿面放电式介质阻挡等离子体应用提供参考。沿面放电式介质阻挡等离子体区域是与绝缘介质表面放置金属导体电极长度呈正相关的，即金属导体电极长度大的，等离子体区域大，而螺环形式的沿面放电等离子体电极系统的金属导体电极线在增加长度方面受到绝缘介质表面参数的限制，由此导致沿面放电等离子体区域受到限制。
发明内容
针对现有技术中存在的体放电和填充床两种形式的介质阻挡放电等离子体气体阻力大与螺环形沿面放电等离子体区域有限等技术问题，本发明提供一种网孔形沿面放电等离子体产生氧活性物质的装置。
本发明解决其技术问题所采用的技术方案是：
一种网孔形沿面放电等离子体产生氧活性物质的装置，该装置包括网孔形沿面放电等离子体反应器、用于向所述网孔形沿面放电等离子体反应器提供含氧气体的含氧气体发生器以及用于向所述网孔形沿面放电等离子体反应器供电以产生等离子体的电源；其中，所述网孔形沿面放电等离子体反应器包括至少一个网孔形沿面放电等离子体模块，所述网孔形沿面放电等离子体模块包括具有高压接线电极和低压接线电极的阵列式放电电极系统或管式放电电极系统；
所述阵列式放电电极系统放置于一密封箱体内，所述阵列式放电电极系统包括绝缘支架以及等间距固定安装在所述绝缘支架上的多组放电板，每组放电板包括绝缘介质薄板、紧密安装在所述绝缘介质薄板一侧面的第一金属板以及紧密安装在所述绝缘介质薄板另一侧面的第二金属板，所述第一金属板上均匀开设有第一网孔，所有第一金属板和第二金属板分别通过导线连接起来，形成阵列式放电电极系统的两个接线电极；
所述管式放电电极系统包括母管、设置在所述母管两端的均布法兰以及两端穿过所述母管成阵列形式安装在所述均布法兰上的若干套电极管，每套电极管包括第一金属管、紧密放 置于所述第一金属管内的绝缘介质管以及紧密安放于所述绝缘介质管内壁上的第二金属管，所述第二金属管上均匀开设有第二网孔，所有第一金属管和第二金属管分别通过导线连接起来，形成管式放电电极系统的两个接线电极。
按上述技术方案，在阵列式放电电极系统中，所述第一金属板作为高压接线电极，所述第二金属板作为低压接线电极；在管式放电电极系统中，所述第二金属管作为高压接线电极，所述第一金属管作为低压接线电极。
按上述技术方案，所述第一网孔和第二网孔的形状为长方形、圆形、三角形或多边形。
按上述技术方案，所述第一金属板和第二金属管的厚度是0.1mm-5mm，所述第一网孔和第二网孔的直径均为1mm-10mm，相邻第一网孔边缘的间距、相邻第二网孔边缘的间距均是0.1mm-50mm。
按上述技术方案，所述网孔形沿面放电等离子体模块还包括高压绝缘子和低压绝缘子，所述高压绝缘子的一端与阵列式放电电极系统或管式放电电极系统的高压接线电极连接，其另一端与电源的高压输出端连接，所述低压绝缘子的一端与阵列式放电电极系统或管式放电电极系统的低压接线电极连接，其另一端与电源的低压输出端连接。
按上述技术方案，所述网孔形沿面放电等离子体模块还包括设置在密封箱体两端或两个均布法兰上的进气头和出气头，所述进气头与含氧气体发生器连接，所述出气头与一微孔曝气器连接，所述微孔曝气器设置在一容器内。
按上述技术方案，所述绝缘介质薄板和绝缘介质管的绝缘介质为石英玻璃、陶瓷、云母或聚乙烯。
按上述技术方案，所述网孔形沿面放电等离子体反应器包括若干个串并联组成的网孔形沿面放电等离子体模块。
按上述技术方案，所述电源为一台或多台。
按上述技术方案，所述电源为脉冲波形高压、正弦波形高压、三角波波形高压或方波波形高压的交流高压电源，所述交流高压电源的频率为50Hz-20kHz。
本发明，具有以下有益效果：该装置通过设置具有网孔的第一金属板或第二金属管作为高压接线电极或低压接线电极，可以使得相同绝缘介质尺寸下产生沿面放电等离子体区域大，从而节省等离子体空间体积；另外，该装置采用气体阻力小的网孔形沿面放电等离子体反应器，适于对大流量空气或氧气进行放电活化处理。
附图说明
下面将结合附图及实施例对本发明作进一步说明，附图中：
图1为本发明实施例一的结构示意图。
图2为本发明实施例一中阵列式放电电极系统的结构示意图。
图3为本发明实施例二中管式放电电极系统的结构示意图。
图4为本发明的应用效果图。
图中：1-密封箱体；2-网孔形沿面放电等离子体反应器；3-电源；4-含氧气体发生器；5-流量计；6-容器；7-导线；8-硅橡胶管；9-微孔曝气器；10-进气头；11-出气头；12-高压绝缘子；13-低压绝缘子；14-第一金属板；15-绝缘介质薄板；16-第二金属板；17-绝缘支架；18-母管；19-电极管；20-均布法兰。
具体实施方式
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本发明，并不用于限定本发明。
在本发明的较佳实施例中，如图1-图3所示，一种网孔形沿面放电等离子体产生氧活性物质的装置，该装置包括网孔形沿面放电等离子体反应器2、用于向网孔形沿面放电等离子体反应器2提供含氧气体的含氧气体发生器4(一般采用空气压缩机)以及用于向网孔形沿面放电等离子体反应器2供电以产生等离子体的电源3，当含氧气体发生器4产生的含氧气体通过网孔形沿面放电等离子体反应器2中的等离子体区域时，含氧气体中的含氧物质(包括O 2和H 2O等)受到等离子体中高能电子作用，转变成含氧活性物质(包括O 3、O·、·OH等)；其中，网孔形沿面放电等离子体反应器2包括至少一个网孔形沿面放电等离子体模块，网孔形沿面放电等离子体模块包括具有高压接线电极和低压接线电极的阵列式放电电极系统或管式放电电极系统；
如图1所示，阵列式放电电极系统放置于一密封箱体1内，如图2所示，阵列式放电电极系统包括绝缘支架17以及等间距固定安装在绝缘支架17上的多组放电板，每组放电板包括绝缘介质薄板15、紧密安装在绝缘介质薄板15一侧面的第一金属板14以及紧密安装在绝缘介质薄板15另一侧面的第二金属板16，第一金属板14上均匀开设有第一网孔，所有第一金属板14和第二金属板16分别通过导线7连接起来，形成阵列式放电电极系统的两个接线电极；
如图3所示，管式放电电极系统包括母管18、设置在母管18两端的均布法兰20以及两端穿过母管18成阵列形式安装在均布法兰20上的若干套电极管19，每套电极管19包括第一金属管、紧密放置于第一金属管内的绝缘介质管以及紧密安放于绝缘介质管内壁上的第二 金属管，第二金属管上均匀开设有第二网孔，所有第一金属管和第二金属管分别通过导线7连接起来，形成管式放电电极系统的两个接线电极。
在本发明的优选实施例中，在阵列式放电电极系统中，第一金属板作为高压接线电极，第二金属板作为低压接线电极；在管式放电电极系统中，第二金属管作为高压接线电极，第一金属管作为低压接线电极。
在本发明的优选实施例中，第一网孔和第二网孔的形状为长方形、圆形、三角形或多边形。
在本发明的优选实施例中，第一金属板14和第二金属管的厚度是0.1mm-5mm，第一网孔和第二网孔的直径均为1mm-10mm，相邻第一网孔边缘的间距、相邻第二网孔边缘的间距均是0.1mm-50mm，其中，第二金属管的内径是5mm-50mm，相邻第一金属板14、相邻第二金属管的间距是0.1mm-50mm。
在本发明的优选实施例中，如图1、图3所示，网孔形沿面放电等离子体模块还包括高压绝缘子12和低压绝缘子13，高压绝缘子12的一端与阵列式放电电极系统或管式放电电极系统的高压接线电极连接，其另一端与电源3的高压输出端连接，低压绝缘子13的一端与阵列式放电电极系统或管式放电电极系统的低压接线电极连接，其另一端与电源3的低压输出端连接。
在本发明的优选实施例中，如图1、图3所示，网孔形沿面放电等离子体模块还包括设置在密封箱体1两端或两个均布法兰20上的进气头10和出气头11，进气头10与含氧气体发生器4连接，出气头11与一微孔曝气器9连接，微孔曝气器9设置在一容器6内。
在本发明的优选实施例中，绝缘介质薄板15和绝缘介质管的绝缘介质为石英玻璃、陶瓷、云母或聚乙烯。
在本发明的优选实施例中，网孔形沿面放电等离子体反应器2包括若干个串并联组成的网孔形沿面放电等离子体模块，通过增加网孔形沿面放电等离子体模块的数量，以增加网孔形沿面放电等离子体产生氧活性物质的装置处理气体流量的规模，其规模还可以通过增加网孔形沿面放电等离子体模块的尺寸来实现。
在本发明的优选实施例中，当使用多个网孔形沿面放电等离子体模块时，电源为一台或多台，可以是一台电源给所有模块供电，也可以将所有模块分成若干组，由若干台电源分组供电。
在本发明的优选实施例中，电源3为脉冲波形高压、正弦波形高压、三角波波形高压或方波波形高压的交流高压电源，交流高压电源的频率为50Hz-20kHz。
本发明中网孔形沿面放电等离子体模块做成阵列式结构，其电极结构形状分为两种，即平板式和管式。下面分别介绍平板式的网孔形沿面放电等离子体模块和管式的网孔形沿面放电等离子体模块。
如图1、图2所示，平板式的网孔形沿面放电等离子体模块包括密封箱体1(本实施例中密封箱体为有机玻璃箱)、阵列式放电电极系统、高压绝缘子12、低压绝缘子13、进气头10、出气头11等部件，阵列式放电电极系统由绝缘支架17、若干第一金属板14、若干绝缘介质薄板15(本实施例中绝缘介质薄板为石英玻璃板)和若干第二金属板16组成。
以下为平板式的网孔形沿面放电等离子体模块的组装步骤：
S1、组装阵列式放电电极系统：首先将第一金属板和第二金属板分别紧密固定安装于绝缘介质薄板的两个侧面上，组成一组放电板，其次将若干组组装好的放电板等间距、固定安放在绝缘支架上，构成阵列式放电电极系统，最后再利用导线将每组放电板中同一侧的第一金属板或第二金属板连接起来，形成阵列式放电电极系统的两个接线电极，其中一个作为阵列式放电电极系统的高压接线电极，另一个作为阵列式放电电极系统的低压接线电极；
S2、将组装好的阵列式放电电极系统放置于密封箱体内部，利用导线将阵列式放电电极系统的高压接线电极连接到密封箱体上的高压绝缘子的引线处，利用导线将阵列式放电电极系统的低压接线电极连接到密封箱体上的低压绝缘子的引线处；
S3、将进气头和出气头分别安装于密封箱体的前后两端，作为网孔形沿面放电等离子体产生氧活性物质的装置的气体进口和气体出口；
S4、通过导线分别将交流高压电源的高压输出端和低压输出端与高压绝缘端子和低压绝缘子连接。
如图3所示，管式的网孔形沿面放电等离子体模块包括母管18、若干套电极管19、两个多孔成阵列对称排布的均布法兰20、高压绝缘子12、低压绝缘子13、进气头10、出气头11等部件，每套电极管由第一金属管、绝缘介质管和第二金属管(或者冲孔金属管)组成。
以下为管式的网孔形沿面放电等离子体模块的组装步骤：
S1、将均布法兰安装在母管上两端口处；
S2、根据均布法兰上阵列孔的数量，将若干根第一金属管成阵列形式固定在母管前后两个端口处的均布法兰上，然后将绝缘介质管紧密放置于每根第一金属管中，最后再将第二金属管紧密安放于绝缘介质管内壁上；
S3、将高压绝缘子和低压绝缘子分别安装于母管上两端口的均布法兰的侧壁上，利用导线将每根第二金属管连接在一起后再连接到高压绝缘子上，利用导线再将每根第一金属管连 接在一起后再连接到低压绝缘子上；
S4、将母管前端的进气头或母管后端的出气头，分别安放于母管前后两端的均布法兰上，作为网孔形沿面放电等离子体产生氧活性物质的装置的气体进口和气体出口；
S5、通过导线分别将交流高压电源的高压输出端和低压输出端与高压绝缘端子和低压绝缘子连接。
本实施例介绍一种采用平板式的网孔形沿面放电等离子体模块的网孔形沿面放电等离子体产生氧活性物质的装置，应用该装置氧化处理燃煤烟气湿法脱硫的模拟浆液，如图1所示，该装置包括有机玻璃箱、网孔形沿面放电等离子体反应器、交流高压电源、空气压缩机、流量计5、容器6、导线7、硅橡胶管8和微孔曝气器9等部件，网孔形沿面放电等离子体反应器2放置于有机玻璃箱内部，交流高压电源通过导线7、高压绝缘子12和低压绝缘子13连接到网孔形沿面放电等离子体反应器2上，利用硅橡胶管8将空气压缩机与流量计5、流量计5与网孔形沿面放电等离子体反应器2上的进气头10、网孔形沿面放电等离子体反应器2上的出气头11与微孔曝气器9等彼此连接好，微孔曝气器9放入容器6里面。
如图2所示，网孔形沿面放电等离子体反应器2包括第一金属板(冲孔金属板)、石英玻璃板、第二金属板和绝缘支架17。首先将第一金属板作为高压接线电极紧密放置于石英玻璃板的上表面，另一个第二金属板16作为低压接线电极紧密放置在石英玻璃板的下面，然后再将第一金属板、石英玻璃板和第二金属板组成的放电电极固定安放在绝缘支架17上，最后全部放置于有机玻璃箱中。作为高压接线电极的冲孔第二金属板是厚度0.05mm、边长70mm的正方形铝箔，其冲孔孔径为6mm，孔与孔边缘的间距为3mm；石英玻璃板是边长为110mm、厚度为1.5mm的正方形板；第二金属板16是厚度2mm、边长70mm的正方形不锈钢板；绝缘支架17用方形柱体制成；有机玻璃密封箱1是边长150mm、高度10mm的正方体。
当交流高压电源输出高压，在网孔形沿面放电等离子体反应器的电极系统内部产生沿面放电等离子体，空气压缩机鼓出的空气从网孔形沿面放电等离子体反应器的进气头进入等离子体区域，空气中含氧物质(包括O 2和H 2O等)受等离子体中高能电子作用，转变成含氧活性物质(包括O 3、O、·OH等)后再从网孔形沿面放电等离子体反应器的出气头导出，通过微孔曝气器注入到盛装亚硫酸钙溶液的容器6的浆液中，实现亚硫酸钙的氧化应用。
如图4所示，本发明的应用效果是，在空气压缩机输送流量1m 3/h的空气，交流高压电源峰值电压19kV、50Hz，亚硫酸钙浆液的初始浓度0.01mol/L、初始pH值5.5的条件下，本发明的氧化速率是空气自身氧化速率的3.1倍，氧化时间60min时，等离子体氧化效率是92.4％，远高于空气自氧化效率的52.3％效果。可见，应用本发明氧化处理燃煤烟气湿法脱硫 浆液，具有氧化效率和氧化速率高，以及操作方便等优点。
应当理解的是，对本领域普通技术人员来说，可以根据上述说明加以改进或变换，而所有这些改进和变换都应属于本发明所附权利要求的保护范围。

Claims (10)

  1. 一种网孔形沿面放电等离子体产生氧活性物质的装置，其特征在于，该装置包括网孔形沿面放电等离子体反应器(2)、用于向所述网孔形沿面放电等离子体反应器(2)提供含氧气体的含氧气体发生器(4)以及用于向所述网孔形沿面放电等离子体反应器(2)供电以产生等离子体的电源(3)；其中，所述网孔形沿面放电等离子体反应器(2)包括至少一个网孔形沿面放电等离子体模块，所述网孔形沿面放电等离子体模块包括具有高压接线电极和低压接线电极的阵列式放电电极系统或管式放电电极系统；
    所述阵列式放电电极系统放置于一密封箱体(1)内，所述阵列式放电电极系统包括绝缘支架(17)以及等间距固定安装在所述绝缘支架(17)上的多组放电板，每组放电板包括绝缘介质薄板(15)、紧密安装在所述绝缘介质薄板(15)一侧面的第一金属板(14)以及紧密安装在所述绝缘介质薄板(15)另一侧面的第二金属板(16)，所述第一金属板(14)上均匀开设有第一网孔，所有第一金属板(14)和第二金属板(16)分别通过导线(7)连接起来，形成阵列式放电电极系统的两个接线电极；
    所述管式放电电极系统包括母管(18)、设置在所述母管(18)两端的均布法兰(20)以及两端穿过所述母管(18)成阵列形式安装在所述均布法兰(20)上的若干套电极管(19)，每套电极管(19)包括第一金属管、紧密放置于所述第一金属管内的绝缘介质管以及紧密安放于所述绝缘介质管内壁上的第二金属管，所述第二金属管上均匀开设有第二网孔，所有第一金属管和第二金属管分别通过导线(7)连接起来，形成管式放电电极系统的两个接线电极。
  2. 根据权利要求1所述的网孔形沿面放电等离子体产生氧活性物质的装置，其特征在于，在阵列式放电电极系统中，所述第一金属板作为高压接线电极，所述第二金属板作为低压接线电极；在管式放电电极系统中，所述第二金属管作为高压接线电极，所述第一金属管作为低压接线电极。
  3. 根据权利要求1所述的网孔形沿面放电等离子体产生氧活性物质的装置，其特征在于，所述第一网孔和第二网孔的形状为长方形、圆形、三角形或多边形。
  4. 根据权利要求1所述的网孔形沿面放电等离子体产生氧活性物质的装置，其 特征在于，所述第一金属板(14)和第二金属管的厚度是0.1mm-5mm，所述第一网孔和第二网孔的直径均为1mm-10mm，相邻第一网孔边缘的间距、相邻第二网孔边缘的间距均是0.1mm-50mm。
  5. 根据权利要求1所述的网孔形沿面放电等离子体产生氧活性物质的装置，其特征在于，所述网孔形沿面放电等离子体模块还包括高压绝缘子(12)和低压绝缘子(13)，所述高压绝缘子(12)的一端与阵列式放电电极系统或管式放电电极系统的高压接线电极连接，其另一端与电源(3)的高压输出端连接，所述低压绝缘子(13)的一端与阵列式放电电极系统或管式放电电极系统的低压接线电极连接，其另一端与电源(3)的低压输出端连接。
  6. 根据权利要求1所述的网孔形沿面放电等离子体产生氧活性物质的装置，其特征在于，所述网孔形沿面放电等离子体模块还包括设置在密封箱体(1)两端或两个均布法兰(20)上的进气头(10)和出气头(11)，所述进气头(10)与含氧气体发生器(4)连接，所述出气头(11)与一微孔曝气器(9)连接，所述微孔曝气器(9)设置在一容器(6)内。
  7. 根据权利要求1所述的网孔形沿面放电等离子体产生氧活性物质的装置，其特征在于，所述绝缘介质薄板(15)和绝缘介质管的绝缘介质为石英玻璃、陶瓷、云母或聚乙烯。
  8. 根据权利要求1所述的网孔形沿面放电等离子体产生氧活性物质的装置，其特征在于，所述网孔形沿面放电等离子体反应器(2)包括若干个串并联组成的网孔形沿面放电等离子体模块。
  9. 根据权利要求8所述的网孔形沿面放电等离子体产生氧活性物质的装置，其特征在于，所述电源(3)为一台或多台。
  10. 根据权利要求1所述的网孔形沿面放电等离子体产生氧活性物质的装置，其特征在于，所述电源(3)为脉冲波形高压、正弦波形高压、三角波波形高压或方波波形高压的交流高压电源，所述交流高压电源的频率为50Hz-20kHz。
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