CN201454386U - NOx photocatalytic oxidation reaction device - Google Patents
NOx photocatalytic oxidation reaction device Download PDFInfo
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- CN201454386U CN201454386U CN2009200941156U CN200920094115U CN201454386U CN 201454386 U CN201454386 U CN 201454386U CN 2009200941156 U CN2009200941156 U CN 2009200941156U CN 200920094115 U CN200920094115 U CN 200920094115U CN 201454386 U CN201454386 U CN 201454386U
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- ultraviolet lamp
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Abstract
The utility model relates to an NOx photocatalytic oxidation reaction device which belongs to the technical fields of petrochemical industry and environmental engineering, and comprises a feeding hole, a discharge hole and a gas distribution tube, wherein the gas distribution tube is communicated with the feeding hole, an ultraviolet lamp tube is fixedly arranged in the middle of a reactor through an ultraviolet lamp fixing pad, a quartz plate ring is arranged above the gas distribution tube, and an annular glass tube and an annular reaction tube are arranged between the ultraviolet lamp tube and a reaction tube outer wall; the outer surface of the reaction tube outer wall is processed into uniform slope projections, a silver-plated layer is arranged on the outer surface of the reaction tube outer wall, and a catalyst is fixed on a glass ring with good light transmission so as to improve the mass transfer efficiency and the utilization ratio of light energy; the outer surface of the reaction tube outer wall is processed into the regular slope projections, and a layer of silver is plated on the outer surface of the reaction tube outer wall, so that all the light penetrating through a filling layer can be reflected onto the reactor, and the light efficiency is quite effectual; and the NOx photocatalytic oxidation reaction device has reasonable structural design, fine catalytic effect, easy operation and convenient popularization and application.
Description
Technical field
The utility model belongs to petrochemical industry, field of environment engineering technology, particularly a kind ofly NO can be transformed NO
2Reaction unit.
Background technology
(NOx mainly is NO and NO to nitrogen oxide
2) be discharged in the air, to cause severe contamination to atmosphere, the various countries scientist is in the removal methods of studying NOx. at present about more gas-phase reaction method, liquid absorption method, absorption method, liquid-film method and the microbial method etc. of mainly containing of the method that from various gaseous mixtures, removes NOx. and wherein simple with liquid absorption method technology, processing ease, effluent can be used as liquid fertilizer, do not produce environmental pollution, belong to environmental protection technology and be widely used.And NO is oxidized to NO in the liquid absorption method
2Be that to remove the crucial .NO of NOx in the mist water-soluble hardly, also be insoluble to aqueous slkali, NO will not changed into NO when not disposing clearance that NO will influence total NOx usually with the absorption process denitrogenation
2.
Ultraviolet light carries out illumination to semiconductor, when incident optical energy surpasses energy gap, and TiO
2Electronics on the valence band is excited, and crosses the forbidden band and enters conduction band, produces hole-electron pair on valence band.The water of electronics and hole and absorption and oxygen reaction generate the material of various strong oxidizing properties, mainly are active hydroxys.NO is oxidized to NO exactly in photo catalysis reactor
2, be absorbed by liquid absorption easily.
The kind of Photoreactor can be divided into three kinds by the existence of catalyst:
(1) floated Photoreactor; This class reactor normally is added to photocatalyst powder in institute's solution to be processed.Its advantage is in reaction, pollutant contacts with photochemical catalyst easily, there is not the restriction of mass transport, but have deficiency, treatment effeciency is not high yet, can cause the suspension muddiness when improving catalyst concentration, influence penetrating of light, reduce optical efficiency, and catalyst and fluid separation applications difficulty, the processing cost costliness.
(2) plated film hydrogen-catalyst reactor; The catalyst of this class reactor mainly is that the form with film exists, as the inside and outside wall that titanium dioxide optical catalyst spread upon reactor, lamp tube wall, stainless steel substrates, foaming nickel, glass or above glass cloth, the optical fiber material etc., catalyst film will be adsorbed on contaminant degradation, the mineralising on film surface under the irradiation of ultraviolet light.The characteristics of its maximum are exactly not need catalyst is separated, but reaction is subjected to the restriction of mass transfer easily.
(3) filling bed type photo catalysis reactor.This class reactor is interior filling TiO 2 particle of reactor or surperficial silica gel, γ aluminium dioxide, quartz sand and the bead etc. that scribble titanium dioxide film normally.Since it allow effectively light by and high specific surface area is arranged, be applicable in the reaction system with higher mass transfer ability.This class reactor is compared with the outstanding slurry reactor of tradition, does not need separating catalyst, compares with annular membranaceous reactor, and reaction can not be subjected to the restriction of mass transfer, may cause coming off of film but deficiency is collision between the particle.
This patent designs, makes a kind of new and effective photo catalysis reactor exactly, is applied in the NOx liquid absorption method NO is oxidized to NO
2
Summary of the invention
At the deficiencies in the prior art and defective, the utility model provides the high NOx light of a kind of conversion efficiency to urge catalytic oxidation reaction device.
The utility model is design like this: a kind of NOx light is urged catalytic oxidation reaction device, it is characterized in that: comprise charging aperture 1, discharging opening 11, with the gas distribution tube 2 of feeding inlet, wherein ultraviolet lamp tube 6 is fixedly installed in the middle of the reactor by uviol lamp fixed bolster 5, described gas distribution tube 2 tops are provided with quartz plate ring 4, are provided with ring glass pipe 7 and annular reaction pipe 8 between ultraviolet lamp tube 6 and the reaction tube outer wall 12; The described even ramp projections of reaction tube outer wall 12 outer surfaces also is provided with silver coating 9; Described ultraviolet lamp tube 6 is connected with uviol lamp wiring 3; Be provided with point for measuring temperature 10. between described ultraviolet lamp tube 6 and the reaction tube outer wall 12
The salient point of this reactor has 2 points:
(1) catalyst is fixed on the good glass ring of light transmission, can improves the utilization rate that mass-transfer efficiency also can improve luminous energy.
(2) outer surface of reaction tube outer wall is processed into ramp projections clocklike, and plates one deck silver thereon, and the light through packed layer is all reflexed on the reactor again, and light efficiency extremely proves effective.We experimental data show, are that plane, no silvering are compared with outer tube wall, and light efficiency can improve 17%.
In addition, this oxidizing process pressure changes little, and control and catalyst long service life are many with strong oxidizer oxidation facility easily.
Description of drawings
Fig. 1 is the utility model structural representation
Fig. 2 is the utility model ring glass tubular construction schematic diagram
Fig. 3 is the utility model gas distribution tube structural representation
Fig. 4 is the utility model reaction tube outer wall construction schematic diagram
1 charging aperture among the figure; 2 gas distribution tubes; 3 uviol lamp wiring; 4 quartz plate rings; 5 uviol lamp fixed bolsters; 6 ultraviolet lamp tubes; 7 ring glass pipes; 8 annular reaction pipes; 9 silver coatings; 10 points for measuring temperature; 11 discharging openings; 12 reaction tube outer walls.
The specific embodiment
As shown in Figure 1, this reactor mainly comprises: annular reaction pipe 8, reaction tube outer wall 12 outer surfaces are processed into even ramp projections and plating adds the silver coating 9 that high light utilizes, ultraviolet lamp tube 6, the ring glass pipe 7 of photocatalyst-bearing filler, the annular gas distributor-quartz plate ring 4 of gas distribution tube top and annular reaction pipe or ring glass pipe below.Slave part has the gas distribution tube 2 that communicates with charging aperture 1, connect the uviol lamp wiring 3 of ultraviolet lamp tube, point for measuring temperature 10, and the discharging opening 11 of material, fluorescent tube and reaction tube are fixing with ultraviolet lamp tube 6 by uviol lamp fixed bolster 5, and whole reactor is fixed on the platform by fixation clamp.
Contain NO
xGaseous mixture (generally oxygenous, and certain humidity is arranged) enter the gas distribution tube 2 from charging aperture 1, have even pore below the distributor pipe, make to enter the gas dispersion ejection, the gas that enters then further distributes through quartz plate ring 4 and enters in the annular reaction pipe 8.Gaseous mixture contacts with catalyst on the ring glass pipe 7 in uphill process, under the irradiation of ultraviolet lamp, and NO
xIn NO by whole oxidations and generate the NO that is absorbed by liquid absorption easily
2(NO altogether
2Part is also arranged by further oxidation), and with discharging opening 11 outflows of mainstream gas from reactor upper end material, the ring glass pipe can be selected glass tube Φ 1.0mm for use, ring Φ 6.0mm specification.
The salient point of this reactor has 2 points:
(1), catalyst is fixed on the good glass ring of light transmission, can improve the utilization rate that mass-transfer efficiency also can improve luminous energy.
(2), the outer surface of reaction tube outer wall is processed into ramp projections clocklike, and plate one deck silver thereon, and the light through packed layer is all reflexed on the reactor again, light efficiency extremely proves effective. and we show experimental data, with outer tube wall is that plane, no silvering are compared, and light efficiency can improve 17%.
In addition, this oxidizing process pressure changes little, and control and catalyst long service life are many with strong oxidizer oxidation facility easily.
In NOx wet absorption process, NO is water insoluble, also is insoluble to alkaline solution and NO
2In absorption process, there is NO to generate again.In detecting exit gas during NOx concentration, though NO
2Content is up to standard, but the NO increase makes total NOx concentration not reach requirement, wherein mainly is that NO is converted into NO
2Conversion ratio become key.We use on the basis of strong oxidizer oxidation NO in research, and the photo catalysis reactor oxidation with novel has reached good effect.And handled gas need not be dry, and control is simple.
Claims (3)
1. a NOx light is urged catalytic oxidation reaction device, it is characterized in that: comprise charging aperture (1), discharging opening (11), with the gas distribution tube (2) of feeding inlet, wherein ultraviolet lamp tube (6) is fixedly installed in the middle of the reactor by uviol lamp fixed bolster (5), described gas distribution tube (2) top is provided with quartz plate ring (4), is provided with ring glass pipe (7) and annular reaction pipe (8) between ultraviolet lamp tube (6) and the reaction tube outer wall (12); The even ramp projections of described reaction tube outer wall (12) outer surface also is provided with silver coating (9).
2. a kind of NOx light according to claim 1 is urged catalytic oxidation reaction device, and it is characterized in that: described ultraviolet lamp tube (6) is connected with uviol lamp wiring (3).
3. a kind of NOx light according to claim 1 is urged catalytic oxidation reaction device, it is characterized in that: be provided with point for measuring temperature (10) between described ultraviolet lamp tube (6) and the reaction tube outer wall (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200941156U CN201454386U (en) | 2009-08-04 | 2009-08-04 | NOx photocatalytic oxidation reaction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200941156U CN201454386U (en) | 2009-08-04 | 2009-08-04 | NOx photocatalytic oxidation reaction device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201454386U true CN201454386U (en) | 2010-05-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200941156U Expired - Fee Related CN201454386U (en) | 2009-08-04 | 2009-08-04 | NOx photocatalytic oxidation reaction device |
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|---|---|
| CN (1) | CN201454386U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105597482A (en) * | 2016-02-29 | 2016-05-25 | 埃克赛姆光电技术（苏州）有限公司 | Ultraviolet light treatment device for waste gas treatment and treatment method thereof |
| CN109444322A (en) * | 2018-08-31 | 2019-03-08 | 浙江工业大学 | The device of photocatalytic degradation pernicious gas efficiency under a kind of Observable difference light source |
-
2009
- 2009-08-04 CN CN2009200941156U patent/CN201454386U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105597482A (en) * | 2016-02-29 | 2016-05-25 | 埃克赛姆光电技术（苏州）有限公司 | Ultraviolet light treatment device for waste gas treatment and treatment method thereof |
| CN109444322A (en) * | 2018-08-31 | 2019-03-08 | 浙江工业大学 | The device of photocatalytic degradation pernicious gas efficiency under a kind of Observable difference light source |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100512 Termination date: 20100804 |