CN103599696A - Method and reactor for catalytic degradation of gas-phase organic pollutants by external DC voltage - Google Patents
Method and reactor for catalytic degradation of gas-phase organic pollutants by external DC voltage Download PDFInfo
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- CN103599696A CN103599696A CN201310534268.9A CN201310534268A CN103599696A CN 103599696 A CN103599696 A CN 103599696A CN 201310534268 A CN201310534268 A CN 201310534268A CN 103599696 A CN103599696 A CN 103599696A
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- polytetrafluoroethylene
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Abstract
The invention relates to a catalytic degradation technology, and aims to provide a method and a reactor for catalytic degradation of gas-phase organic pollutants by an external DC voltage. The reactor body is a tubular reactor made of aluminum, both ends of the tubular reactor are respectively provided with polytetrafluoroethylene sleeves; a polytetrafluoroethylene plug is connected to the outer side of each polytetrafluoroethylene sleeve, a gas inlet pipe and a gas outlet pipe are respectively arranged on two polytetrafluoroethylene plugs; a copper electrode passes through the tubular reactor and the polytetrafluoroethylene sleeves and the polytetrafluoroethylene plugs at both ends, and is coincided with an axis of the tubular reactor; a negative electrode is connected with the tubular reactor, and the negative electrode and the copper electrode are respectively connected to a negative electrode and a positive electrode of a DC power supply. The method and the reactor can solve the problem of catalytic activity reduction for the reason that a catalyst is susceptible to SO2, Cl<->, and the like, and can improve the catalyst stability and real-time activity. The method and the reactor aim to form an electric field in the reactor, so that an electric current added to the reaction system is zero, namely no additional energy consumption is caused.
Description
Technical field
The present invention relates to catalytic degradation technology, particularly relate to a kind of method and reactor of impressed DC voltage catalytic degradation gaseous-phase organic pollutant.
Background technology
In recent years, environmental legislation has been carried out strict restriction to airborne release level, and especially, the discharge of organic pollutant has caused widely to be paid close attention to.The discharge of Industrial " three Waste ", the excessive use of agricultural chemicals, chemical fertilizer, the discharge of vehicle exhaust, urban heating fuel combustions in season etc., cause organic pollution extensively to distribute in environment.Organic pollution in soil, water body can be in plant enrichment propagating along food chain, finally at people's cylinder accumulation; Organic pollution in atmosphere can directly enter human body by respiratory system, causes the diseases such as allergy, birth defect, cancer, and make immune system and reproductive organs impaired.Therefore generation and discharge, how to control organic pollution have become problem demanding prompt solution.
At present, the control technology of organic pollution discharge mainly contains adsorption technology, biodegradation technique, catalytic degradation technology and plasma technique etc.Adsorption technology can only be realized the transfer of pollutant, and a kind of preprocessing means of Chang Zuowei is combined use with other processing method.Catalytic degradation technology, because realizing the thorough degraded of organic pollution, generates CO
2, H
2o, HCl etc. are pollution-free product and become one of the most promising technology.But, the defect of the easy inactivation of catalyst ubiquity of catalytic degradation technical research at present and application, the surface area minimizing that the catalyst that alkalinous metal deposition, ammonium sulfate and the flying dusts such as sodium, potassium cause stops up, sintering causes, catalyst poisoning etc. are all the reasons that causes catalysqt deactivation.Wherein, cause the SO of catalyst poisoning
2, the particle such as chlorion obtained paying close attention to widely.
The easy inactivation of catalyst causes catalyst on the low side service life, and the replacing of catalyst also causes the waste of manpower and materials.Therefore, improve catalyst stability to keep the real-time activity of catalyst very necessary.
Summary of the invention
The technical problem to be solved in the present invention is, overcomes the deficiency in existing technology, and a kind of method and reactor of impressed DC voltage catalytic degradation gaseous-phase organic pollutant is provided.
For technical solution problem, solution of the present invention is:
The reactor that a kind of impressed DC voltage catalytic degradation gaseous-phase organic pollutant is provided, comprises reactor body; This reactor body is the tubular reactor of aluminium matter, and polytetrafluoroethylene (PTFE) cover is set up at its two ends separately; The outside of polytetrafluoroethylene (PTFE) cover is respectively connected to polytetrafluoroethylene (PTFE) plug, and two polytetrafluoroethylene (PTFE) are established respectively air inlet pipe and escape pipe beyond the Great Wall; Copper electrode runs through polytetrafluoroethylene (PTFE) cover and the polytetrafluoroethylene (PTFE) plug at tubular reactor, two ends, and with the dead in line of tubular reactor; Negative electrode and tubular reactor join, and negative electrode and copper electrode are connected to respectively negative pole and the positive pole of dc source.
In the present invention, described negative electrode is connected on the end of the tubular reactor of escape pipe one side, and puts and draw from the polytetrafluoroethylene (PTFE) of this side.
In the present invention, described polytetrafluoroethylene (PTFE) cover is connected by flange with polytetrafluoroethylene (PTFE) plug.
In the present invention, on the inwall of described tubular reactor, be coated with the conductor catalyst layer or the semiconductor catalyst layer that possess conductive capability.
The present invention also further provides the method that realizes impressed DC voltage catalytic degradation gaseous-phase organic pollutant based on previous reaction device, comprises the following steps:
(1) inner surface at described tubular reactor plates conductor catalyst or the semiconductor catalyst that one deck possesses conductive capability;
(2) wire of D.C. regulated power supply is connected to respectively to described negative electrode and copper electrode, in the operating voltage range of 0-1000V, adjust D.C. regulated power supply, make to form with copper electrode length direction between tubular reactor and copper electrode orthogonal to extraradial electric field;
(3) tail gas of tail gas from incinerator treating apparatus being discharged is introduced described air inlet pipe, and discharges from escape pipe; By the mode of impressed DC voltage, make conductor catalyst or semiconductor catalyst electronegative, the organic pollution in gas phase is carried out to catalytic degradation.
In the present invention, described in possess conductive capability conductor catalyst or semiconductor catalyst be: MnOx/TiO
2-CNT, VOx/TiO
2, VOx-WOx/TiO
2or VOx-MoOx/TiO
2in any one.
The principle that realizes of the present invention is:
Because catalyst is to be evenly plated in aluminum pipe inner surface, thereby indirectly make catalyst electronegative; Positive source connects the copper electrode (positive electrode) that is positioned at reactor axial region, and inside reactor is formed along radius to extraradial electric field.The air-flow that contains organic pollution is passed into by reactor one end with certain flow rate.Organic pollution in the adsorbable degraded air-flow of catalyst.On the one hand, applied voltage can improve active metal at the decentralization of catalyst surface, promotes the displacement of catalyst film surface electronic, thereby improves the activity of catalyst.On the other hand, inside reactor form by axle along radius to extraradial electric field, make anion (as Cl
-, O
2 -) be subject to pointing to the electric field force of axle, weaken the anion that produces in course of reaction and the interaction between catalyst, away from catalyst surface.This not only can reduce chlorion in the adhering to of catalyst surface, and alleviates intoxicating phenomenon, keeps the real-time activity of catalyst, and can promote the O with strong oxidizing property that generates in catalytic reaction process simultaneously
2 -enter space with the free group such as OH, increase target organic pollutant molecule and O
2 -with the collision probability of group in space reactor such as OH, improve degradation efficiency.
Compared with prior art, beneficial effect of the present invention is:
1, the present invention can solve catalyst and be subject to SO
2, Cl
-the problem that causes catalytic activity to reduce Deng affecting, the stability of raising catalyst and in real time activity.
2, the present invention just forms electric field at inside reactor, and the electric current that therefore adds reaction system is zero, does not cause extra energy consumption.
Accompanying drawing explanation
Fig. 1 is impressed DC voltage catalytic reactor structural representation.
In figure, 1-air inlet pipe, 2-copper electrode, 3-polytetrafluoroethylene (PTFE) plug, 4-polytetrafluoroethylene (PTFE) cover, 5-tubular reactor, 6-quartz window, 7-negative electrode, 8-escape pipe.
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is explained in detail.
As shown in Figure 1, the main body of the reactor of impressed DC voltage catalytic degradation gaseous-phase organic pollutant is the tubular reactor 5 of aluminium matter, is coated with the conductor catalyst layer or the semiconductor catalyst layer that possess conductive capability on its inwall.Tubular reactor 5 is provided with the quartz window 6 for observing, and polytetrafluoroethylene (PTFE) cover 4 is set up at its two ends separately.Can polytetrafluoroethylene (PTFE) cover 4 be taken off according to the needs of the organic pollution treating apparatus of access, use the connectors such as flange or triple valve and treating apparatus instead and join.The outside of polytetrafluoroethylene (PTFE) cover 4 is respectively connected to polytetrafluoroethylene (PTFE) plug 3, and polytetrafluoroethylene (PTFE) cover 4 is connected by flange with polytetrafluoroethylene (PTFE) plug 3.On two polytetrafluoroethylene (PTFE) plugs 3, establish respectively air inlet pipe 1 and escape pipe 8.A copper electrode 2 runs through polytetrafluoroethylene (PTFE) cover 4 and the polytetrafluoroethylene (PTFE) plug 3 at tubular reactor 5, two ends, and the dead in line of copper electrode 2 and tubular reactor 5; A negative electrode 7 is connected on the end of the tubular reactor 5 of escape pipe 8 one sides, and draws from the polytetrafluoroethylene (PTFE) cover 7 of this side.Negative electrode 7 and copper electrode 2 are connected to respectively negative pole and the positive pole of dc source, and this dc source is continuously adjustable D.C. regulated power supply, operating voltage 0-1000V.
In the present invention, the method that realizes gaseous-phase organic pollutant catalytic degradation is: on the inwall of aluminum tubular reactor, plate conductor catalyst or semiconductor catalyst that one deck possesses conductive capability; The positive and negative electrode of aluminum tubular reactor 5 is joined with the positive and negative electrode of D.C. regulated power supply respectively, make to form by axle along radius to extraradial electric field in reactor; D.C. regulated power supply is adjusted into operating voltage; Air inlet pipe is connected to tail gas from incinerator treating apparatus, the gaseous-phase organic pollutant in tail gas from incinerator is carried out to catalytic degradation.
The conductor catalyst or the semiconductor catalyst that possess conductive capability, the MnOx/TiO that can use sol-gal process to prepare
2-CNT catalyst.Can also select VOx/TiO
2catalyst, VOx-WOx/TiO
2catalyst, VOx-MoOx/TiO
2deng, being commercially produced product, can freely buy.For example, VOx-WOx/TiO
2catalyst can be selected the product of San Long catalyst Co., Ltd.Certainly, user also can make by oneself as required, and its preparation method, because of metal catalyst preparation field conventional means, does not belong to the related content of the present invention, therefore repeat no more.
In the concrete application of actual production device, can realize in the following manner:
First, with supersonic wave cleaning machine, clean aluminum tubular reactor 5 and copper electrode 2, dry, prevent that the dust and other impurities that is attached to reactor surface from exerting an influence to catalyst plated film.
Second step, is evenly plated in reactor inner surface by catalyst.
The 3rd step, is installed to copper electrode 2 on reactor.
The 4th step, receives D.C. regulated power supply positive and negative electrode respectively on mounted aluminum tubular reactor 5 and copper electrode 2, and D.C. regulated power supply is adjusted into operating voltage.
The 5th step, is connected to exhaust gas processing device by air inlet pipe 1, and gaseous-phase organic pollutant is carried out to catalytic degradation.
Catalyst can absorption degradation gaseous-phase organic pollutant, and due to the existence of applied voltage, catalyst can keep higher real-time activity.In addition, the electric current that is added in reaction system due to power supply is zero, so do not cause extra energy consumption.After impressed DC voltage, the removal efficiency of organic pollution can improve over 10%, and catalyst activity property improvement effect is remarkable.
Finally, it is also to be noted that, what more than enumerate is only specific embodiments of the invention.Obviously, the invention is not restricted to above embodiment, can also have a lot of distortion.All distortion that those of ordinary skill in the art can directly derive or associate from content disclosed by the invention, all should think protection scope of the present invention.
Claims (6)
1. the reactor of impressed DC voltage catalytic degradation gaseous-phase organic pollutant, comprises reactor body; It is characterized in that, this reactor body is the tubular reactor of aluminium matter, and polytetrafluoroethylene (PTFE) cover is set up at its two ends separately; The outside of polytetrafluoroethylene (PTFE) cover is respectively connected to polytetrafluoroethylene (PTFE) plug, and two polytetrafluoroethylene (PTFE) are established respectively air inlet pipe and escape pipe beyond the Great Wall; Copper electrode runs through polytetrafluoroethylene (PTFE) cover and the polytetrafluoroethylene (PTFE) plug at tubular reactor, two ends, and with the dead in line of tubular reactor; Negative electrode and tubular reactor join, and negative electrode and copper electrode are connected to respectively negative pole and the positive pole of dc source.
2. reactor according to claim 1, is characterized in that, described negative electrode is connected on the end of the tubular reactor of escape pipe one side, and puts and draw from the polytetrafluoroethylene (PTFE) of this side.
3. reactor according to claim 1, is characterized in that, described polytetrafluoroethylene (PTFE) cover is connected by flange with polytetrafluoroethylene (PTFE) plug.
4. reactor according to claim 1, is characterized in that, is coated with the conductor catalyst layer or the semiconductor catalyst layer that possess conductive capability on the inwall of described tubular reactor.
5. based on reactor described in claim 1, realize a method for impressed DC voltage catalytic degradation gaseous-phase organic pollutant, it is characterized in that, comprise the following steps:
(1) inner surface at described tubular reactor plates conductor catalyst or the semiconductor catalyst that one deck possesses conductive capability;
(2) wire of D.C. regulated power supply is connected to respectively to described negative electrode and copper electrode, in the operating voltage range of 0-1000V, adjust D.C. regulated power supply, make to form with copper electrode length direction between tubular reactor and copper electrode orthogonal to extraradial electric field;
(3) tail gas of tail gas from incinerator treating apparatus being discharged is introduced described air inlet pipe, and discharges from escape pipe; By the mode of impressed DC voltage, make conductor catalyst or semiconductor catalyst electronegative, the organic pollution in gas phase is carried out to catalytic degradation.
6. method according to claim 5, is characterized in that, described in possess conductive capability conductor catalyst or semiconductor catalyst be: MnOx/TiO
2-CNT, VOx/TiO
2, VOx-WOx/TiO
2or VOx-MoOx/TiO
2in any one.
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|---|---|---|---|
| CN201310534268.9A CN103599696B (en) | 2013-10-31 | 2013-10-31 | Method and reactor for catalytic degradation of gas-phase organic pollutants by external DC voltage |
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|---|---|---|---|
| CN201310534268.9A CN103599696B (en) | 2013-10-31 | 2013-10-31 | Method and reactor for catalytic degradation of gas-phase organic pollutants by external DC voltage |
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|---|---|
| CN103599696A true CN103599696A (en) | 2014-02-26 |
| CN103599696B CN103599696B (en) | 2015-04-15 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109200803A (en) * | 2017-06-30 | 2019-01-15 | 上海交通大学 | Electrostatic field cooperates with coupled catalyst monolith honeycomb reactor |
| TWI816409B (en) * | 2022-05-25 | 2023-09-21 | 綠膜科技股份有限公司 | High-efficiency electrolytic structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200984495Y (en) * | 2006-11-23 | 2007-12-05 | 浙江大学 | Device for processing waste gas by homogeneous improving of corona discharge by using un-homogeneous catalyst |
| CN102091514A (en) * | 2010-12-28 | 2011-06-15 | 浙江大学 | Device and method for treating obnoxious gas and industrial VOCs |
| CN201997241U (en) * | 2011-04-01 | 2011-10-05 | 浙江工商大学 | Reactor for treating VOCs with plasma cooperating with chemical catalysis |
| CN203620513U (en) * | 2013-10-31 | 2014-06-04 | 浙江大学 | Reactor for catalytically degrading gas-phase organic pollutants by external direct current voltage |
-
2013
- 2013-10-31 CN CN201310534268.9A patent/CN103599696B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200984495Y (en) * | 2006-11-23 | 2007-12-05 | 浙江大学 | Device for processing waste gas by homogeneous improving of corona discharge by using un-homogeneous catalyst |
| CN102091514A (en) * | 2010-12-28 | 2011-06-15 | 浙江大学 | Device and method for treating obnoxious gas and industrial VOCs |
| CN201997241U (en) * | 2011-04-01 | 2011-10-05 | 浙江工商大学 | Reactor for treating VOCs with plasma cooperating with chemical catalysis |
| CN203620513U (en) * | 2013-10-31 | 2014-06-04 | 浙江大学 | Reactor for catalytically degrading gas-phase organic pollutants by external direct current voltage |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109200803A (en) * | 2017-06-30 | 2019-01-15 | 上海交通大学 | Electrostatic field cooperates with coupled catalyst monolith honeycomb reactor |
| TWI816409B (en) * | 2022-05-25 | 2023-09-21 | 綠膜科技股份有限公司 | High-efficiency electrolytic structure |
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|---|---|
| CN103599696B (en) | 2015-04-15 |
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