CN204411991U - For electrode and reactor thereof in the dielectric barrier discharge of particulate organic matter process - Google Patents
For electrode and reactor thereof in the dielectric barrier discharge of particulate organic matter process Download PDFInfo
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- CN204411991U CN204411991U CN201520018980.8U CN201520018980U CN204411991U CN 204411991 U CN204411991 U CN 204411991U CN 201520018980 U CN201520018980 U CN 201520018980U CN 204411991 U CN204411991 U CN 204411991U
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Abstract
The utility model discloses a kind of for electrode and reactor thereof in the dielectric barrier discharge of particulate organic matter process, this interior electrode is made up of the stainless steel tube be alternately arranged successively (1) and powder of stainless steel sintered pipes (2), stainless steel tube (1) is connected with powder of stainless steel sintered pipes (2) sealing, thus forms multistage combined interior electrode; The passage of stainless steel tube (1) and the passage of powder of stainless steel sintered pipes (2) define interior electrode internal channel (3); The metal reaction body that powder of stainless steel sintered pipes (2) is porous; At the outer surface supported precious metal catalyst of powder of stainless steel sintered pipes (2); One end of the nearly air inlet of described interior electrode is closed, and the one end open near gas outlet is also communicated with gas outlet.This reactor utilizes above-mentioned interior electrode preparation and obtains.The utility model can overcome the problems such as the electric discharge of conventional filtration composite electro catalytic dielectric impedance reactor is uneven, strength of discharge is low, organic matter degradation poor effect.
Description
Technical field
The utility model relates to a kind of interior electrode processing the dielectric barrier discharge reactor of particulate form organic pollution.
Background technology
Suspend aerial solid particulate matter because working the mischief to biological and health and be referred to as Particulate Pollution.Particle kind in atmospheric environment is a lot, generally refers to the grit between 0.1-75 μm, dust, spray dust, cigarette, chemical fumes and coal smoke.Polycyclic aromatic hydrocarbon (Polycyclic aromatic hydrocarbons is called for short PAHs) is also a kind of organic compound of particulate form, is made up of, as naphthalene, anthracene, phenanthrene, pyrene etc. two or more phenyl ring.PAHs is main in an atmosphere to be existed with Gas and particles two kinds of forms, wherein the small-molecular-weight PAHs of 2 ~ 3 rings mainly exists with gas phase, the distribution of PAHs in Gas and particles of 4 rings is substantially identical, and the macromolecule PAHs of 5 ~ 7 rings is then most to be existed with Particle Phase.Wherein the particle diameter of the PAHs of most of Particle Phase is greatly about less than 1.1 μm, and fraction particle diameter is greatly about more than 7 μm.
At present, also comparatively weak to the control of PAHs in air both at home and abroad, especially for the control of particulate form PAHs in flue gas, its process means also rest on dedusting technology.Traditional processing method is that the mode by improving dust removal performance removes particulate form PAHs, but because particulate form PAHs is usually with PM
10following fine particulate form exists, and conventional electrostatic precipitator is not good to the removal effect of this type of particle.
Low-temperature plasma degradation organic pollution technology utilizes the material such as the high energy electron with extensive chemical activity, ion, free radical that gas discharge produces under highfield, these active materials all have very high efficiency in enhancing oxidability, promotion molecular dissociation and acceleration chemical reaction etc., deep oxidation can be carried out to the organic pollution of low concentration in flue gas, generate harmless CO
2and H
2o.Simultaneously dielectric barrier discharge can also with the combine with technique such as catalysis, plasma oxidation, catalytic oxidation are played a role jointly, thus the degradable organic pollutant of effective, harmless.Although research shows that simple dielectric barrier discharge has higher organic matter removal efficiency, there is the problems such as capacity usage ratio is low, carbonation rate is not high.In order to overcome the shortcoming that simple plasma discharge exists, electric discharge and catalyzing cooperation technology progressively grow up.Under the acting in conjunction of catalytic oxidation and plasma oxidation, capacity usage ratio and COx selection rate are all greatly improved.
But for process particulate form PAHs, plasma body cooperative catalysis technique can not obtain good removal efficiency.Really to realize dielectric impedance micro discharge effectively removing particulate form PAHs in air, must trap at solid phase PAHs, find new breakthrough in plasma-catalytic oxidation performance etc., therefore just derive multisection type and filtered composite electro catalytic oxidation technology.Particulate form particle is filtered and retains in the reactor, extends the time of staying, thus the active oxidation material that can produce with plasma discharge and catalyst fully contact, and greatly improve oxidability, finally change into CO
2and H
2the innocuous substances such as O.The alternately layout of multisection type can make filtration, catalysis, discharge process obtain maximum using simultaneously, and organic matter removal efficiency, capacity usage ratio and COx selection rate are also all farthest embodied.
The invention " filtering the reactor of composite electro catalytic oxidation processes PAHs " of application number 201110218959.9 adopts powder of stainless steel sintered pipes as electrode in dielectric barrier discharge.But because powder of stainless steel pipe (that is, porous metals reaction body) outer surface is rough, detector for outer diameter error is large, thus reduces the strength of discharge of dielectric impedance and the generation of ozone, and then affects the degraded of organic particulate matter; Meanwhile, along with the particle of powder of stainless steel tube outer surface attachment constantly increases, the uniformity of electric discharge is destroyed further, and energy injection is a greater impact.For this reason, we propose electrode in a kind of novel dielectric barrier discharge, overcome the above problems.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of interior electrode of novel dielectric barrier discharge reactor, this interior electrode adopts multistage combined design, overcomes the problems such as the electric discharge of conventional filtration composite electro catalytic dielectric impedance reactor is uneven, strength of discharge is low, organic matter degradation poor effect.
In order to solve the problems of the technologies described above, the utility model provides a kind of for electrode in the dielectric barrier discharge reactor of particulate organic matter process, this interior electrode is made up of the stainless steel tube be alternately arranged successively and powder of stainless steel sintered pipes, and described stainless steel tube is connected with the sealing of powder of stainless steel sintered pipes; Thus form multistage combined interior electrode (for having the coefficient multistage combined interior electrode of filtration, chemical catalysis and plasma oxidation);
The passage of stainless steel tube and the passage of powder of stainless steel sintered pipes define interior electrode internal channel;
Described powder of stainless steel sintered pipes is the metal reaction body of porous; At the various noble metal catalyst of outer surface load of powder of stainless steel sintered pipes;
One end of the nearly air inlet of described interior electrode is closed, and the one end open near gas outlet is also communicated with gas outlet.
As the improvement for electrode in the dielectric barrier discharge reactor of particulate organic matter process of the present utility model: external diameter (overall diameter) 2 ~ 3mm larger than the external diameter of powder of stainless steel sintered pipes of described stainless steel tube; Every section of stainless steel tube and powder of stainless steel sintered pipes length ratio are 1:2 ~ 3.
Remarks illustrate: in same interior electrode, the external diameter of each section of stainless steel tube is identical, and allowable tolerance is within 0.05mm.The external diameter of each section of powder of stainless steel pipe is also identical simultaneously, and allowable tolerance is within 0.5mm.
As the further improvement for electrode in the dielectric barrier discharge reactor of particulate organic matter process of the present utility model: the noble metal catalyst load capacity of powder of stainless steel sintered pipes is 0.5 ~ 1ug/cm
2(powder of stainless steel tube outer surface amasss).
That is, every cm
2the noble metal of powder of stainless steel sintered pipes external surface area load 0.5 ~ 1ug.
As the further improvement for electrode in the dielectric barrier discharge reactor of particulate organic matter process of the present utility model: the noble metal catalyst of powder of stainless steel sintered pipes load is that precious metal salt is at high temperature calcined and formed, and described precious metal salt is gold chloride, silver nitrate or chloroplatinic acid.That is, calcining gained is gold oxide, silver oxide, platinum oxide.
As the further improvement for electrode in the dielectric barrier discharge reactor of particulate organic matter process of the present utility model: precious metal oxide catalyst adopts coating process load, specific as follows:
By the outer surface of precious metal salt solution uniform application at powder of stainless steel sintered pipes, after smearing, natural drying 30 ~ 60 minutes in atmosphere, then in the temperature lower calcination 5 ~ 6h of 400 ~ 500 DEG C, finally naturally cools to room temperature.
As the further improvement for electrode in the dielectric barrier discharge reactor of particulate organic matter process of the present utility model: the aperture of described powder of stainless steel sintered pipes is 3 μm, 10 μm, 30 μm, 50 μm, thus the filtration crown_interception realized the particle of different-grain diameter, porosity 40% ~ 60%; The thickness of powder of stainless steel sintered pipes is at 3 ~ 10mm.
The utility model also provides simultaneously and utilizes the preparation of above-mentioned interior electrode and the reactor that obtains, and comprise housing, one end of housing is air inlet, and the other end is gas outlet; The outside wall surface coated metal conducting objects of housing, metallic conduction thing ground connection is as the external electrode of dielectric barrier discharge; Electrode in external ac high-voltage or high voltage pulse is set in housing; Interior electrode is closed near one end of air inlet, the one end open of interior electrode near gas outlet and being connected with gas outlet; Gap between the inwall of housing and the outer wall of stainless steel tube is 1 ~ 5mm; Described gap forms dielectric barrier discharge gap, and this dielectric barrier discharge gap is connected with air inlet;
Described dielectric barrier discharge gap is not communicated with gas outlet, and the gas after process flows out from interior electrode internal channel and enters gas outlet.
Remarks illustrate: this housing is with patent 201110218959.9.
In the utility model, one section of stainless steel tube, the set-up mode of the multi-stage alternate of one section of powder of stainless steel sintered pipes can make filtration, oxidation more abundant, contributes to the oxidation removal of particulate form organic pollution.In electric discharge field, due to the precision of stainless steel tube higher (tolerance can be controlled in 0.05mm within), evenly, Implantation Energy is high, can produce more oxidative free radical, deep oxidation organic pollution in electric discharge; The powder of stainless steel sintered pipes of simultaneously load noble metal catalyst can make organic exhaust gas by whole Catalytic Layer, fully contacts, contributes to further catalytic oxidation, improve CO with Catalytic Layer
2selection rate, really accomplish harmless treatment.
Described stainless steel tube external diameter is slightly larger than the powder sintered pipe 2 ~ 3mm of stainless steel tube.When the external diameter of stainless steel tube is greater than the external diameter of powder of stainless steel pipe, stainless steel tube outer surface discharges, and powder of stainless steel sintered pipes produces electric discharge greatly and not due to discharging gap.So in this in electrode stainless steel tube be mainly used in dielectric barrier discharge occurs, produce the oxidative free radical of high concentration, and powder of stainless steel sintered pipes mainly participates in filtering and catalysed oxidn.In addition, in order to improve filter effect and catalytic effect, the length of stainless steel tube is less than the length of powder of stainless steel pipe, and the length of every section of stainless steel tube and the length ratio of powder of stainless steel pipe are 1:2 ~ 1:3.
Powder of stainless steel sintered pipes described in the utility model be by spherical or erose powder of stainless steel by compressing and high temperature sintering the obtained porous material with rigid structure, its structure is with " the porous metals reaction body 3 " of informing in patent 201110218959.9.Powder of stainless steel sintered pipes supported precious metal catalyst.The noble metal catalyst of load is preferably gold or platinum etc.The comprehensive good characteristics such as noble metal catalyst has high catalytic activity, high temperature resistant, anti-oxidant, have higher catalytic oxidation effect at low temperatures, contribute to oxidative free radical and catalyst generation concerted reaction simultaneously, improve the degradation effect of organic exhaust gas.The face concentration of the catalyst of load is 0.5 ~ 1ug/cm
2(powder of stainless steel sintered pipes external surface area).
Described noble metal catalyst adopts coating in conjunction with the method load of high-temperature calcination, first the salting liquid of gold, silver, platinum is used (namely, precious metal salt solution) be evenly coated in powder of stainless steel sintered pipes outer surface, dry 30 ~ 60min in atmosphere afterwards, then at the temperature of 400 ~ 500 DEG C, carry out the calcining of 5 ~ 6h, finally in drying box, be cooled to room temperature.Powder of stainless steel sintered pipes has the features such as density is little, porosity is high, specific area is large, has good filtration crown_interception to the organic matter of particulate form.
In order to obtain larger reaction specific area, less passes through resistance, there is good filter effect to fine organic particle simultaneously, the porosity 40% ~ 60% of general sintered pipes (powder of stainless steel sintered pipes), aperture is less than 0.1mm, generally has the plurality of specifications such as 3 μm, 10 μm, 30 μm, 50 μm.
Remarks illustrate:
1, in same interior electrode, stainless steel tube is all consistent with the external diameter of powder of stainless steel pipe, but the external diameter of powder of stainless steel sintered pipes is less than stainless steel tube.
2, on same powder of stainless steel sintered pipes, aperture is consistent.
3, on interior electrode along the powder of stainless steel sintered pipes that the direction (namely air inlet is to the direction of gas outlet) of air-flow is arranged, aperture can be consistent, and aperture also can from large to little arrangement.
4, in the utility model, the initiating terminal (that is, near air inlet) of interior electrode is stainless steel tube; The clearing end (that is, near gas outlet) of interior electrode is stainless steel tube or powder of stainless steel sintered pipes.
In multistage combined dielectric barrier discharge of the present utility model, electrode can produce the oxidative free radical of high concentration, integrate filtration and chemical catalytic oxidation simultaneously, efficient trapping and the oxidative degradation of particulate organic matter can be realized, effectively can control the generation of harmful side product simultaneously, greatly improve the carbonation rate of degraded.
Operation principle of the present utility model is as follows:
1, the pending organic exhaust gas containing particulate organic matter enters from reactor air inlet, first through dielectric barrier discharge gap that first paragraph stainless steel tube and housing are formed, in dielectric barrier discharge process, a large amount of high energy electrons and living radical can be produced in discharging gap, these active materials and organic matter generation electron collision and radical reaction, realize organic initial breakdown.
2, enter first paragraph powder of stainless steel sintering tube layer through the partial particulate state organic matter of initial breakdown with air-flow afterwards, gas enters in powder of stainless steel sintered pipes and (that is, enters in interior electrode internal channel); Particle is intercepted at the outer surface of powder of stainless steel sintered pipes under the filtration of powder of stainless steel sintered pipes, generation oxidation reaction can be fully contacted with the plasma in dielectric barrier discharge gap, simultaneously on sintered pipes outer surface noble metal catalytic action under, these particles will finally change into harmless CO
2and H
2o.
3, the particulate organic matter that part is not degradable continues to flow forward, and through follow-up stainless steel tube and powder of stainless steel sintered pipes, continuous oxidized decomposition, realizes deep oxidation.Along with being repeatedly used alternatingly of stainless steel tube and powder of stainless steel sintered pipes, electric discharge, filtration retain and can farthest be played with catalysed oxidn, the active oxidation material (oxygen atom, ozone) produced is more, and the organic degraded of organic exhaust gas particularly particulate form is more thorough.
The utility model for the treatment of electrode in particulate organic matter dielectric barrier discharge reactor, the multistage combined interior electrode of form composition that employing one section of stainless steel tube, one section of powder of stainless steel sintered pipes are replaced.Wherein, stainless steel tube participates in electric discharge, and powder of stainless steel sintered pipes does not participate in electric discharge, but powder of stainless steel pipe can supported precious metal catalyst.Powder of stainless steel sintered pipes has the advantages that aperture is little, aperture specification is many, porosity is high and specific area is large, has good filter capacity to the particulate form organic pollution of different-grain diameter.For the organic matter of some particulate forms, when it is through powder of stainless steel sintered pipes, sintered pipes surface can be trapped within, greatly extend its time of staying in the reactor, simultaneously with the active material on stainless steel sintered pipes surface with and noble metal catalyst fully contact, finally under catalysed oxidn, change into harmless CO
2and H
2o.In addition, for in degradation process due to thorough do not produced other gaseous organic substance of reaction, first in the discharging gap of stainless steel tube, preliminary oxidation is completed with the active oxidation free radical produced that discharges, next enter powder of stainless steel sintered pipes filter course fully to contact with noble metal catalyst, complete catalytic oxidation further, byproduct of reaction problem is effectively solved.
The utility model compared with prior art has following beneficial effect:
The multi-stage alternate of stainless steel tube and powder of stainless steel sintered pipes is arranged, filtration, oxidation can be made more abundant, contribute to the deep oxidation step by step of particulate organic matter.The precision of stainless steel tube is higher simultaneously, and relatively more even during electric discharge, Implantation Energy is large, and can produce more oxidative free radical, the ozone concentration of generation is high; Powder of stainless steel sintered pipes can the catalyst such as carried noble metal, and low-temperature catalyzed performance is good, and process gas is after stainless steel tube, again by the Catalytic Layer of whole sintered pipes, fully contact with catalyst, contribute to the treating technology of pollutant, finally change into harmless CO
2and H
2o.
In sum, the utility model discloses a kind of for electrode in the dielectric barrier discharge reactor of particulate organic matter process.This interior electrode is alternately made up of stainless steel tube and powder of stainless steel sintered pipes, forms one and has electrode in filtration catalytic and the coefficient multisection type compound of plasma discharge.Its one end near air inlet is closed, and the one end open near gas outlet is also communicated with gas outlet; Described powder of stainless steel sintered pipes is a kind of metal reaction body of porous, can supported precious metal catalyst.The efficient degradation to particulate organic matter can be realized after interior electrode of the present utility model and external shell combine.Compared with original whole section of screen pipe (201110218959.9), discharge more uniform and stable, Implantation Energy is higher, and ozone concentration is high; Multiple segment filters effect is more desirable, is oxidized more thorough.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described in further detail.
Fig. 1 is the multistage combined inner electrode schematic diagram of the utility model;
Fig. 2 is that the A-A of Fig. 1 analyses and observe enlarged diagram;
Fig. 3 is the structural representation of whole reactor.
Detailed description of the invention
Embodiment 1, a kind of as depicted in figs. 1 and 2 for the treatment of electrode in the dielectric barrier discharge reactor of particulate organic matter, be alternately made up of stainless steel tube 1 and powder of stainless steel sintered pipes 2; Described stainless steel tube 1 is connected with powder of stainless steel sintered pipes 2 sealing, thus forms multistage combined interior electrode (for having the coefficient multistage combined interior electrode of filtration, chemical catalysis and plasma oxidation).Wherein powder of stainless steel sintered pipes 2 be by spherical or erose powder of stainless steel by compressing and high temperature sintering the obtained porous material with rigid structure, and supported precious metal catalyst.The catalyst of load is preferably Au or Pt, the general 0.5 ~ 1ug/cm of load capacity
2(powder of stainless steel sintered pipes 2 external surface area).That is, every cm
2au or Pt of powder of stainless steel sintered pipes external surface area load 0.5 ~ 1ug.Noble metal catalyst adopts coating process load repeatedly, first with the salting liquid (gold chloride or platinum acid chloride solution) of Au or Pt prepared, uniform coating is carried out to powder of stainless steel sintered pipes 2, dry certain hour in atmosphere afterwards, then at the temperature of 400 ~ 500 DEG C, carry out the calcining of 5 ~ 6h, then cooling is weighed.The external diameter of powder of stainless steel sintered pipes 2 is 20mm, porosity 40 ~ 60%, and aperture is not more than 0.1mm, that is, have 3 μm, 10 μm, 30 μm, 50 μm equal-specifications.The external diameter of stainless steel tube 1 is slightly larger than powder sintered pipe 2 (large 2 ~ 3mm); Stainless steel tube 1 is closed near this end face of air inlet, and this end face central aperture near gas outlet is also communicated with gas outlet (as shown in Figure 3).The thickness of powder of stainless steel sintered pipes 2 is at 3 ~ 10mm.Every section of stainless steel tube 1 is 1:2 ~ 3 with powder of stainless steel sintered pipes 2 length ratio.The passage of stainless steel tube 1 and the passage of powder of stainless steel sintered pipes 2 define interior electrode internal channel 3.
The two ends of this interior electrode are provided with the support component for supporting interior electrode, such as, be back shaft etc.
Embodiment 2, a kind ofly use the interior electrode described in embodiment 1 and design processing and the reactor that obtains, as described in Figure 3, comprise housing 4, one end of housing is air inlet, and the other end is gas outlet; The outside wall surface coated metal conducting objects of housing 4, metallic conduction thing ground connection is as the external electrode of dielectric barrier discharge; Arrange above-mentioned multistage combined electrode in the middle of in housing 4, its external AC power supply or the pulse power become electrode in dielectric barrier discharge reactor; Interior electrode is closed near one end of air inlet, the one end open of interior electrode near gas outlet and being connected with gas outlet; Gap between the inwall of housing and the outer wall of stainless steel tube 1 is 1 ~ 5mm; Described gap forms dielectric barrier discharge gap, and this dielectric barrier discharge gap is connected with air inlet; Described dielectric barrier discharge gap is not communicated with gas outlet, and gas flow flows to reactor gas outlet by perforate again through interior electrode internal channel 3.
Application example 1,
The initiating terminal (that is, near air inlet) of interior electrode is stainless steel tube 1, and the clearing end (that is, near gas outlet) of interior electrode is powder of stainless steel sintered pipes 2.
Be provided with 3 sections of stainless steel tubes 1 altogether, the length 3cm of every section of stainless steel tube 1; 3 sections of powder of stainless steel sintered pipes 2, the length 6cm of every section of powder of stainless steel sintered pipes 2; Every section of stainless steel tube and powder of stainless steel sintered pipes length ratio are 1:2, the total effective length L=27cm of interior electrode.
The diameter (external diameter) of every section of stainless steel tube 1 is 20mm (wall thickness is 6mm), and the diameter (external diameter) of every section of powder of stainless steel sintered pipes 2 is 17mm (wall thickness is 3mm); That is, the diameter of stainless steel tube 1 3mm larger than the diameter of powder of stainless steel sintered pipes 2.
The precious metal oxide catalyst load capacity of powder of stainless steel sintered pipes 2 is 0.8ug/cm
2(powder of stainless steel tube outer surface amasss).Noble metal selects gold, is chlorauric acid solution coating.
The aperture of powder of stainless steel sintered pipes 2 is: 3 μm, and porosity is 50%.
Gap between the inwall of housing 4 and the outer wall of stainless steel tube 1 is 1.9mm; The coating of housing 4 is aluminium foil.
Application example 2, make the noble metal of application example 2 into silver by gold, be liquor argenti nitratis ophthalmicus coating, all the other are with application example 1.
Application example 3, make the noble metal of application example 2 into platinum by gold, be platinum acid chloride solution coating, all the other are with application example 1.
Experiment, the reactor described in above-mentioned application example 1 ~ application example 3 is carried out the process of naphthalene waste gas, exhaust gas flow is 0.2L/min, and naphthalene concentration is 50ppm, is the high voltage pulse (frequency is 400Hz) of 9kV at input crest voltage.
Application example 1, the degradation efficiency of naphthalene is more than 95%, CO
2selection rate is up to more than 90%.
Application example 2, the degradation efficiency of naphthalene is about 86%, CO
2selection rate is about 80%.
Application example 3, the degradation efficiency of naphthalene is about 89%, CO
2selection rate is about 84%.
Comparison example 1-1, makes 20mm (that is, with the diameter of stainless steel tube 1) into by the diameter of powder of stainless steel sintered pipes 2; Precious metal oxide catalyst load capacity is 0.8ug/cm
2(external surface area of powder of stainless steel sintered pipes 2), all the other are with application example 1.
Comparison example 1-2, being made into by interior electrode is all powder of stainless steel sintered pipes 2, and powder of stainless steel sintered pipes 2 total length is 27cm, and is coated with noble metal catalyst thereon, and precious metal oxide catalyst load capacity is 0.8ug/cm
2(powder of stainless steel sintered pipes 2 external surface area), the gap between the inwall of housing 4 and the outer wall of powder of stainless steel sintered pipes 2 is about 1.9mm; All the other are with application example 1.
Comparison example 2-1, made into " titanium " by " gold " by the catalyst in application example 1, content is constant, and all the other are with application example 1.
Comparison example 2-2, made into " cobalt " by " gold " by the catalyst in application example 1, content is constant, and all the other are with application example 1.
Comparison example 2-3, made into " manganese " by " gold " by the catalyst in application example 1, content is constant, and all the other are with application example 1.
Contrast experiment, above-mentioned all comparison example detected according to the method described above, acquired results is described in table 1 below:
Table 1
| The degradation efficiency (%) of naphthalene | CO 2Selection rate (%) | |
| Comparison example 1-1 | 85 | 78 |
| Comparison example 1-2 | 81 | 65 |
| Comparison example 2-1 | 45 | 43 |
| Comparison example 2-2 | 64 | 40 |
| Comparison example 2-3 | 78 | 36 |
Application example 4, make " aperture of 3 sections of powder of stainless steel sintered pipes is 3 μm, and porosity is 50% " in application example 1 into following content:
The aperture of first paragraph powder of stainless steel sintered pipes is 30 μm, and porosity is 50%;
The aperture of second segment powder of stainless steel sintered pipes is 10 μm, and porosity is 50%;
The aperture of the 3rd section of powder of stainless steel sintered pipes is 3 μm, and porosity is 50%;
Remarks illustrate: above-mentioned first paragraph powder of stainless steel sintered pipes ~ three section powder of stainless steel sintered pipes, for being arranged in order along airflow direction.
All the other contents are equal to application example 1.
Detected according to the described method of above-mentioned experiment by above-mentioned application example 4, acquired results is as follows:
The degradation efficiency of naphthalene is more than 98%, CO
2selection rate is up to more than 90%.
Finally, it is also to be noted that what enumerate above is only several specific embodiments of the present utility model.Obviously, the utility model is not limited to above embodiment, can also have many distortion.All distortion that those of ordinary skill in the art can directly derive from content disclosed in the utility model or associate, all should think protection domain of the present utility model.
Claims (4)
1. for electrode in the dielectric barrier discharge reactor of particulate organic matter process, it is characterized in that: this interior electrode is made up of the stainless steel tube be alternately arranged successively (1) and powder of stainless steel sintered pipes (2), described stainless steel tube (1) is connected with powder of stainless steel sintered pipes (2) sealing, thus forms multistage combined interior electrode;
The passage of stainless steel tube (1) and the passage of powder of stainless steel sintered pipes (2) define interior electrode internal channel (3);
The metal reaction body that described powder of stainless steel sintered pipes (2) is porous; At the outer surface supported precious metal catalyst of powder of stainless steel sintered pipes (2);
One end of the nearly air inlet of described interior electrode is closed, and the one end open near gas outlet is also communicated with gas outlet.
2. according to claim 1 for electrode in the dielectric barrier discharge reactor of particulate organic matter process, it is characterized in that: the external diameter 2 ~ 3mm larger than the external diameter of powder of stainless steel sintered pipes (2) of described stainless steel tube (1); Every section of stainless steel tube (1) is 1:2 ~ 3 with powder of stainless steel sintered pipes (2) length ratio.
3. according to claim 2 for electrode in the dielectric barrier discharge reactor of particulate organic matter process; It is characterized in that: the aperture of described powder of stainless steel sintered pipes (2) is 3 μm, 10 μm, 30 μm, 50 μm, porosity 40% ~ 60%; The thickness of powder of stainless steel sintered pipes (2) is at 3 ~ 10mm.
4. utilize the arbitrary described interior electrode preparation of claim 1 ~ 3 and the reactor that obtains, comprise housing (4), one end of housing (4) is air inlet, and the other end is gas outlet; The outside wall surface coated metal conducting objects of housing (4), metallic conduction thing ground connection is as the external electrode of dielectric barrier discharge; It is characterized in that: the interior electrode that external ac high-voltage or high voltage pulse are set in housing (4); Interior electrode is closed near one end of air inlet, the one end open of interior electrode near gas outlet and being connected with gas outlet; Gap between the inwall of housing (4) and the outer wall of stainless steel tube (1) is 1 ~ 5mm; Described gap forms dielectric barrier discharge gap, and this dielectric barrier discharge gap is connected with air inlet;
Described dielectric barrier discharge gap is not communicated with gas outlet, and the gas after process enters gas outlet from the outflow of interior electrode internal channel (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520018980.8U CN204411991U (en) | 2015-01-11 | 2015-01-11 | For electrode and reactor thereof in the dielectric barrier discharge of particulate organic matter process |
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|---|---|---|---|
| CN201520018980.8U CN204411991U (en) | 2015-01-11 | 2015-01-11 | For electrode and reactor thereof in the dielectric barrier discharge of particulate organic matter process |
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| CN204411991U true CN204411991U (en) | 2015-06-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104524915A (en) * | 2015-01-11 | 2015-04-22 | 浙江富春江环保热电股份有限公司 | Dielectric-barrier discharging internal electrode for particle-state organic matter treatment and reactor thereof |
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2015
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104524915A (en) * | 2015-01-11 | 2015-04-22 | 浙江富春江环保热电股份有限公司 | Dielectric-barrier discharging internal electrode for particle-state organic matter treatment and reactor thereof |
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