CN103599696B - 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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- CN103599696B CN103599696B CN201310534268.9A CN201310534268A CN103599696B CN 103599696 B CN103599696 B CN 103599696B CN 201310534268 A CN201310534268 A CN 201310534268A CN 103599696 B CN103599696 B CN 103599696B
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- polytetrafluoroethylene
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- tubular reactor
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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 carried out strict restriction to airborne release level, and especially, the discharge of organic pollutant causes to be paid close attention to widely.The discharge of Industrial " three Waste ", the excessive use of agricultural chemicals, chemical fertilizer, the discharge of vehicle exhaust, urban heating fuel combustion in season etc., cause organic pollution extensively to distribute in the environment.Organic pollution in soil, water body can in plant enrichment and along food chain propagate, finally at people's cylinder accumulation; Organic pollution in air directly can enter human body by respiratory system, causes the diseases such as allergy, birth defect, cancer, and make immune system and reproductive organs impaired.Therefore, the generation and the discharge that how to control organic pollution 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 realize the transfer of pollutant, a kind of preprocessing means of Chang Zuowei and other processing method conbined usage.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 catalyst ubiquity easy in inactivation of current catalytic degradation technology Study and appliance, surface area minimizing, catalyst poisoning etc. that the catalyst blockage that the alkalinous metal such as sodium, potassium deposition, ammonium sulfate and flying dust cause, sintering cause are all the reasons causing catalysqt deactivation.Wherein, the SO of catalyst poisoning is caused
2, the particle such as chlorion obtains and pays close attention to widely.
Catalyst easy in inactivation causes catalyst on the low side for service life, and the replacing of catalyst also causes the waste of manpower and materials.Therefore, catalyst stability is improved 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, provides a kind of method and reactor of impressed DC voltage catalytic degradation gaseous-phase organic pollutant.
For technical solution problem, solution of the present invention is:
A kind of reactor 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) establish air inlet pipe and escape pipe beyond the Great Wall respectively; Copper electrode runs through tubular reactor, the polytetrafluoroethylene (PTFE) cover at two ends and polytetrafluoroethylene (PTFE) plug, and with the dead in line of tubular reactor; A negative electrode connects with tubular reactor, and negative electrode and copper electrode are connected to negative pole and the positive pole of dc source respectively.
In the present invention, described negative electrode is connected on the end of the tubular reactor of escape pipe side, and draws from the polytetrafluoroethylene (PTFE) cover of this side.
In the present invention, described polytetrafluoroethylene (PTFE) cover passes through Flange joint with polytetrafluoroethylene (PTFE) plug.
In the present invention, the inwall of described tubular reactor is coated with the conductor catalyst layer or semiconductor catalyst layer that possess conductive capability.
The present invention still further provides the method realizing impressed DC voltage catalytic degradation gaseous-phase organic pollutant based on previous reaction device, comprises the following steps:
(1) plate at the inner surface of described tubular reactor conductor catalyst or the semiconductor catalyst that one deck possesses conductive capability;
(2) wire of D.C. regulated power supply is connected to described negative electrode and copper electrode respectively, in the operating voltage range of 0-1000V, adjust D.C. regulated power supply, make formation between tubular reactor and copper electrode orthogonal to extraradial electric field with copper electrode length direction;
(3) tail gas that tail gas from incinerator treating apparatus is discharged is introduced described air inlet pipe, and discharge from escape pipe; By the mode of impressed DC voltage, make conductor catalyst or semiconductor catalyst electronegative, catalytic degradation is carried out to the organic pollution in gas phase.
In the present invention, described in possess the conductor catalyst of conductive capability or semiconductor catalyst is: 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 evenly plated in aluminum pipe inner surface, thus indirectly make catalyst strips negative electricity; Positive source connects the copper electrode (positive electrode) being positioned at reactor axle portion, and inside reactor is formed along radius to extraradial electric field.Air-flow containing 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 the decentralization of active metal at catalyst surface, the displacement of promoting catalyst film surface electronics, thus improves the activity of catalyst.On the other hand, inside reactor formed by axle along radius to extraradial electric field, make anion (as Cl
-, O
2 -) be subject to the electric field force pointing to axle, weaken the interaction between anion and catalyst produced in course of reaction, away from catalyst surface.This not only can reduce the attachment of chlorion at catalyst surface, 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 causing catalytic activity to reduce Deng impact, improves the stability of catalyst and real-time activity.
2, the present invention just forms electric field at inside reactor, and the electric current therefore adding reaction system is zero, does not namely 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.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is stated 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, its inwall is coated with the conductor catalyst layer or semiconductor catalyst layer that possess conductive capability.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.According to the needs of the organic pollution treating apparatus of access, polytetrafluoroethylene (PTFE) cover 4 can be taken off, uses the connector such as flange or triple valve instead and connect with treating apparatus.The outside of polytetrafluoroethylene (PTFE) cover 4 is respectively connected to polytetrafluoroethylene (PTFE) plug 3, and polytetrafluoroethylene (PTFE) cover 4 passes through Flange joint with polytetrafluoroethylene (PTFE) plug 3.Two polytetrafluoroethylene (PTFE) plugs 3 are established respectively air inlet pipe 1 and escape pipe 8.Copper electrode 2 runs through tubular reactor 5, the polytetrafluoroethylene (PTFE) cover 4 at two ends and polytetrafluoroethylene (PTFE) plug 3, 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 side, and draws from the polytetrafluoroethylene (PTFE) cover 7 of this side.Negative electrode 7 and copper electrode 2 are connected to negative pole and the positive pole of dc source respectively, and this dc source is continuously adjustable D.C. regulated power supply, operating voltage 0-1000V.
In the present invention, the method realizing 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 connected with the positive and negative electrode of D.C. regulated power supply respectively, makes to be formed by axle along radius to extraradial electric field in reactor; D.C. regulated power supply is adjusted to operating voltage; Air inlet pipe is connected to tail gas from incinerator treating apparatus, catalytic degradation is carried out to the gaseous-phase organic pollutant in tail gas from incinerator.
Possess conductor catalyst or the semiconductor catalyst of conductive capability, MnOx/TiO prepared by sol-gal process can be used
2-CNT catalyst.VOx/TiO can also be selected
2catalyst, VOx-WOx/TiO
2catalyst, VOx-MoOx/TiO
2deng, be commercially produced product, can freely buy.Such as, VOx-WOx/TiO
2catalyst can select the product of three imperial catalyst Co., Ltds.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 content involved by the present invention, therefore repeats no more.
In the embody rule of actual production device, can realize in the following manner:
First, with supersonic wave cleaning machine cleaning aluminum tubular reactor 5 and copper electrode 2, dry, prevent the dust and other impurities being attached to reactor surface from having an impact to catalyst plated film.
Second step, is evenly plated in reactor inner surface by catalyst.
3rd step, is installed to copper electrode 2 on reactor.
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 to operating voltage.
5th step, is connected to exhaust gas processing device by air inlet pipe 1, carries out catalytic degradation to gaseous-phase organic pollutant.
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 being 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 more than 10%, and catalyst activity improves Be very effective.
Finally, it is also to be noted that what enumerate above is only specific embodiments of the invention.Obviously, the invention is not restricted to above embodiment, a lot of distortion can also be had.All distortion that those of ordinary skill in the art can directly derive from content disclosed by the invention or associate, all should think protection scope of the present invention.
Claims (4)
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) establish air inlet pipe and escape pipe beyond the Great Wall respectively; Copper electrode runs through tubular reactor, the polytetrafluoroethylene (PTFE) cover at two ends and polytetrafluoroethylene (PTFE) plug, and with the dead in line of tubular reactor; A negative electrode connects with tubular reactor, and negative electrode and copper electrode are connected to negative pole and the positive pole of dc source respectively;
Described negative electrode is connected on the end of the tubular reactor of escape pipe side, and draws from the polytetrafluoroethylene (PTFE) cover of this side; The inwall of described tubular reactor is coated with the conductor catalyst layer or semiconductor catalyst layer that possess conductive capability.
2. reactor according to claim 1, is characterized in that, described polytetrafluoroethylene (PTFE) cover passes through Flange joint with polytetrafluoroethylene (PTFE) plug.
3. realize a method for impressed DC voltage catalytic degradation gaseous-phase organic pollutant based on reactor described in claim 1, it is characterized in that, comprise the following steps:
(1) wire of D.C. regulated power supply is connected to described negative electrode and copper electrode respectively, in the operating voltage range of 0-1000V, adjust D.C. regulated power supply, make formation between tubular reactor and copper electrode orthogonal to extraradial electric field with copper electrode length direction;
(2) tail gas that tail gas from incinerator treating apparatus is discharged is introduced described air inlet pipe, and discharge from escape pipe; By the mode of impressed DC voltage, make conductor catalyst or semiconductor catalyst electronegative, catalytic degradation is carried out to the organic pollution in gas phase.
4. method according to claim 3, is characterized in that, described in possess the conductor catalyst of conductive capability or semiconductor catalyst is: MnOx/TiO
2-CNT, VOx/TiO
2, VOx-WOx/TiO
2or VOx-MoOx/TiO
2in any one.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 CN103599696A (en) | 2014-02-26 |
| CN103599696B true CN103599696B (en) | 2015-04-15 |
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| 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)
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|---|---|---|---|---|
| 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 |
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