CN104474886B - Method for photocatalytic degradation of waste gas by electrodeless excimer lamp - Google Patents
Method for photocatalytic degradation of waste gas by electrodeless excimer lamp Download PDFInfo
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- CN104474886B CN104474886B CN201410666104.6A CN201410666104A CN104474886B CN 104474886 B CN104474886 B CN 104474886B CN 201410666104 A CN201410666104 A CN 201410666104A CN 104474886 B CN104474886 B CN 104474886B
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- 239000002912 waste gas Substances 0.000 title claims abstract description 83
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000013033 photocatalytic degradation reaction Methods 0.000 title claims description 31
- 239000007789 gas Substances 0.000 claims abstract description 187
- 239000010453 quartz Substances 0.000 claims abstract description 103
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Abstract
The invention discloses a method for degrading waste gas by photocatalysis of an electrodeless excimer lamp. The three quartz medium layers comprise a first quartz tube, a second quartz tube and a third quartz tube which are coaxial and are sequentially arranged from inside to outside; the inner cavity of the first quartz tube is a reaction area III; a closed annular cavity is formed between the second quartz tube and the first quartz tube and is used as a gas filling area II; a reaction area I is formed between the third quartz tube and the second quartz tube. When the waste gas is degraded by photocatalysis, the gas filled in the zone II is excited to generate excimer ultraviolet light, the excimer ultraviolet light is radiated towards the reaction zones in the zones I and III, and the waste gas to be degraded is degraded under the action of excimer ultraviolet radiation after passing through the reaction zones in the zones I or III or shunting to enter the reaction zones in the zones I and III.
Description
The application is Application No. 201310089087.X, filing date on March 20th, 2013, and invention and created name is
The divisional application of the application for a patent for invention of " apparatus and method of electrodeless quasi-molecule lamp photocatalytic degradation waste gas ".
Technical field
The present invention relates to exhaust gas decomposition field, a kind of method being specifically related to electrodeless quasi-molecule lamp photocatalytic degradation waste gas.
Background technology
Ultraviolet source has been widely used in the fields such as microelectronics, medicine, chemical industry, health and environmental protection, becomes a basis
Property and guardian technique.Above-mentioned all application are required to light source narrower radiation spectrum and certain radiation intensity.For passing
The middle high-pressure mercury lamp of system, its radiation spectrum wave-length coverage width (from ultra-violet (UV) band to visual field), the ultraviolet light light efficiency of required wavelength
Low；Low pressure mercury lamp and inert gas lamp can radiate narrow-band ultraviolet light spectrum, but its light intensity is relatively weak, has influence on corresponding photochemistry
Reaction rate；Although LASER Light Source energy radiant high intensity, narrow spectrum, but beam spot size is little and expensive.And electrodeless standard
Molecule ultraviolet source is owing to having intense radiation, narrow radiation spectrum, high, strong, the relative low price of plasticity of photoelectric transformation efficiency etc.
Advantage and become the efficient incoherence light source of a kind of novelty.
Traditional light source typically all has electrode, due to the existence of electrode in lamp, result in a series of problem: the longevity
Order short, burning time and length stabilization time, electrode material with luminescent substance range of choice is little, change in shape is few, light radiation utilizes
Rate is low and additional circuit is complicated etc..
With traditional have EUV light source compared with, electrodeless quasi-molecule uviol lamp is not owing to having electrode, luminescent substance in fluorescent tube
Range of choice is widened significantly, the most getable ultraviolet wavelength of available traditional UV lamps.Difference can be filled according to demand in lamp
Material, send the VUV radiation to long wave ultraviolet scope, radiant power is strong, and light efficiency is higher, is that to adapt to photochemistry anti-
Should required specific wavelength, the new ultra-violet light source of high intensity.
From the eighties in 20th century, the electrodeless quasi-molecule lamp research in photochemistry field gradually increases.The purple of Non-polarized lamp
(Ultraviolet, UV) radiation outward is polluted in material surface modifying, dry ecthing, film deposition, organic synthesis, photooxidation
The aspects such as improvement all have broad application prospects.Owing to such light source does not has electrode, will not produce as other charging sources
The blackout phenomenon caused due to anodizing, loss and sealing-in sealing problem, and by operating voltage (be only no longer seldom
220 V, and free voltage can be used), operating frequency, (waveform is also not only sine to operating current, can be square wave, arteries and veins
Rush ripple) restriction, many qualities such as light efficiency, photochromic, life-span, shape, packing material all achieve significant progress.
Quasi-molecule is that (life-span is 10 to the upper state with constraint-6～10-7S) divide with the ground state repelling (weak beam is tied up)
Son (the life-span 10-13S) compound or atomic collision state that general designation, also referred to as three-body collision are radiationless.Quasi-molecule can only be at some
Could produce under the conditions of special gas discharge, as dielectric barrier discharge (Dielectric Barrier Discharge,
DBD), the condition such as high-power electron beam, α particle, synchrotron radiation, high-frequency discharge, microwave discharge, pulsed discharge.During electric discharge, atom
Being excited to high electron energy level, these excited atoms produce a molecule and by the 3rd with ground state atom or molecular collision
Person transfer part energy is allowed to from the high slow Henan of vibration excited state to low vibration excited state, becomes metastable molecule, with
Time send respective wavelength ultraviolet radiation.
It is applied to mainly dielectric barrier discharge electrodeless quasi-molecule uviol lamp and the microwave discharge electrodeless of Environmental capacity at present
Lamp, and electrodeless quasi-molecule uviol lamp is applied to the degraded major part of pollutant and also rests on aqueous phase pollutant.
Such as Chinese patent literature CN 2592631 Y(number of patent application: ZL 02264075.4) disclose a kind of accurate point
Sub-ultraviolet source, it includes that the gas of the cooling ripples pipe and its outer sleeve that are provided with the electrode electrically connected with high-frequency and high-voltage power supply is put
Electron beam tube, this light source can be widely used in the circulation of water and disinfect or photochemical reaction, when filling Xe and Cl2During mixed gas
The ultraviolet light that wavelength is 308nm can be given off.Chinese patent literature CN 101857283 B(number of patent application: ZL 2,010 1
0203436.2) disclose a kind of micro-wave nonpolar Excimer lamp and process the device of waste water and the air distribution system of lamp, process the dress of waste water
Put include microwave power supply, microwave generator, electrodeless quasi-molecule lamp, purification tank for liquid waste, microwave generator include shell, magnetron and
Resonator housing.Above-mentioned two parts of patents are all that electrodeless quasi-molecule uviol lamp is applied to aqueous phase pollutant.
About electrodeless quasi-molecule uviol lamp being applied to the technical scheme of vapor phase contaminants, Chinese patent literature CN
1319600 C(number of patent application: ZL 200510030278.4) disclose a kind of low concentration Wind Volume foul gas process dress
Putting and method, device is sequentially connected with is formed by screen pack, photolysis device, cellular activated carbon bed and blower fan, wherein photolysis
Device uses 172nm Excimer UV lamp, and this lamp is depended on from outside to inside by outer quartz socket tube, external electrode, interior quartz socket tube and interior electrode
Secondary composition, between external electrode quartz socket tube outside and interior quartz socket tube, interior electrode is inside interior quartz socket tube.Gas to be degraded
Enter reaction zone from the space between outer quartz socket tube and reactor wall, enter honeycomb through the reacted air-flow of photolysis device and live
Property charcoal bed continues to react.The principle of this device is to be placed in the middle of reactor by electrodeless quasi-molecule lamp, and gas is from Non-polarized lamp
Degrade under light illumination when side is flow through.
Chinese patent literature CN 1216680C(number of patent application: 01814678.3) to disclose a kind of Excimer uv light anti-
Answer device, branched Excimer lamp is oppositely disposed into irradiated body and column-shaped, from these in reactant gas ambiance
Excimer UV lamp is towards irradiated body irradiating ultraviolet light, so that irradiated body surface occurs photochemical reaction.The knot of this device
Structure is more complicated, and floor space is big, and it is the most more that the later stage runs the equipment needing to safeguard.
Summary of the invention
The technical problem to be solved is to provide a kind of method of electrodeless quasi-molecule lamp photocatalytic degradation waste gas.
The technical scheme realizing the object of the invention is a kind of method of electrodeless quasi-molecule lamp photocatalytic degradation waste gas, used instead
Device is answered to include three layers of quartz medium layer, interior electrode, external electrode and high voltage power supply.
First quartz ampoule that described three layers of quartz medium layer include coaxial line, that set gradually from inside to outside, the second quartz
Pipe and the 3rd quartz ampoule；Interior electrode is arranged on the inside of the first quartz ampoule, and external electrode is arranged on the lateral surface of the second quartz ampoule.
The open at both ends of the first quartz ampoule, the internal cavities of the first quartz ampoule is III district's reaction zone；Second quartz ampoule suit
Outside the first quartz ampoule, the upper/lower terminal port of the second quartz ampoule is sintered in the lateral surface of the first quartz ampoule, thus second is quartzy
Form airtight toroidal cavity between pipe and the first quartz ampoule, fill IIth district as gas；The open at both ends of the 3rd quartz ampoule, the
I district's reaction zone is formed between three quartz ampoules and the second quartz ampoule.
During photocatalytic degradation waste gas, gas is filled after IIth district vacuumizes, to gas fill IIth district be filled with rare gas or
Rare gas halogen mixed gas；Connecting after high voltage power supply, gas is filled the gas in IIth district and is excited generation Excimer UV light,
Radiate to the direction of I district's reaction zone and III district's reaction zone.
Waste gas to be degraded all through I district's reaction zone, is degraded under Excimer UV radiation effects；Or wait to degrade
Waste gas all through III district's reaction zone, be degraded under Excimer UV radiation effects；Or waste gas to be degraded is diverted into
Enter I district's reaction zone and III district's reaction zone, be degraded under Excimer UV radiation effects；Gas is anti-from I district's reaction zone or IIIth district
After answering district to flow out, air-introduced machine extract discharge out.
As preferably, degrade in entering reactor with steam and dry clean air after the waste gas degraded mixes.
As preferably, from the waste gas to be degraded of waste gas generator or the outflow of waste gas air accumulator through gas mixer
Preliminary mixing, then after air inlet distributor porous shunts, enter I district's reaction zone or III district's reaction zone is degraded.
During degraded, it is Xe that gas fills the rare gas that IIth district is filled with2；Rare gas-the halogen mixture gas being filled with is
Ar/F2、 Kr/Cl2、 Kr/Br2、 Kr/I2、Xe/I2、Xe/C2、Kr/F2；Wavelength X=108 of the quasi-molecule light of reactor radiation
～345nm.
High voltage power supply used is medium-frequency pulse square wave power, and discharge voltage is adjustable in the range of kV～kV.
The device of the electrodeless quasi-molecule lamp photocatalytic degradation waste gas used by said method, including gas skirt, adapter sleeve, air inlet
Distributor, reactor, give vent to anger distributor and air-introduced machine；Gas skirt includes lower gas skirt and upper gas skirt, lower gas skirt, connection
Set, reactor, give vent to anger distributor and upper gas skirt sets gradually from bottom to top；The air inlet port of air-introduced machine goes out with upper gas skirt
Gas port is connected.
The air inlet of lower gas skirt is connected with the waste gas generator gas outlet of gas to be degraded or air accumulator, lower gas skirt
Gas outlet be connected with the air inlet of adapter sleeve by flange；The gas outlet of adapter sleeve communicates with the inlet end of air inlet distributor.
Reactor is arranged on air inlet distributor and gives vent to anger between distributor；Reactor includes three layers of quartz medium layer, interior electricity
Pole, external electrode and high voltage power supply；First quartz that described three layers of quartz medium layer include coaxial line, that set gradually from inside to outside
Pipe, the second quartz ampoule and the 3rd quartz ampoule；Interior electrode is arranged on the inside of the first quartz ampoule, and external electrode is arranged on the second quartz ampoule
Lateral surface on.
The open at both ends of the first quartz ampoule, the internal cavities of the first quartz ampoule is III district's reaction zone；Second quartz ampoule suit
Outside the first quartz ampoule, the upper/lower terminal port of the second quartz ampoule is sintered in the lateral surface of the first quartz ampoule, thus second is quartzy
Form airtight toroidal cavity between pipe and the first quartz ampoule, fill IIth district as gas；The open at both ends of the 3rd quartz ampoule, the
I district's reaction zone is formed between three quartz ampoules and the second quartz ampoule.
Described air inlet distributor includes main body, through hole, cannelure, through hole stopper and I district's air inlet through hole；Through hole is arranged on master
The central authorities of body, cannelure is arranged on the periphery of through hole and is coaxially set with through hole, the axis of I district's air inlet through hole and the axle of main body
Line is parallel and completely through main body, and the air outlet of I district's air inlet through hole is positioned at cannelure.
Through hole stopper is arranged in through hole, and through hole stopper is porous plug or blind hole plug；The main body of described porous plug is a circle
Cylinder, including blind hole and III district's air inlet through hole, blind hole is arranged on the center upper portion of porous plug, and III district's air inlet through hole is arranged on blind hole
The gas outlet of lower section and III district's air inlet through hole communicates with blind hole；The main body of described blind hole plug is a cylinder, the top of blind hole plug
Central authorities arrange blind hole.
Ith district of I district's air inlet through hole, I district's reaction zone and the distributor of giving vent to anger of air inlet distributor goes out vent hole and is connected；When
When through hole stopper is porous plug, IIIth district of III district's air inlet through hole, III district's reaction zone and the distributor of giving vent to anger of air inlet distributor goes out
Vent hole is connected.
As preferably, device also includes gas mixer, and gas mixer is arranged on the inside of adapter sleeve, and gas mixes
The air inlet of device communicates with the internal cavities of adapter sleeve, and the gas outlet of gas mixer communicates with the inlet end of air inlet distributor.
Further, air inlet distributor also includes porous sieve plate, and porous sieve plate is arranged on above I district's air inlet through hole.
Further, air inlet distributor also includes piston channel, piston channel being radially arranged in main body along main body,
Each I district's air inlet through hole is correspondingly arranged a piston channel, piston channel and I district's air inlet through hole and is connected；In piston channel
Being provided with piston, the motion of piston ecto-entad arrives inner side Shi Jiang I district's air inlet through hole and blocks.
The interior electrode of described reactor is sheet metal, dispatch from foreign news agency extremely wire netting；Or the interior electrode of reactor is wire netting,
Dispatch from foreign news agency extremely sheet metal；Or the interior electrode of reactor is wire netting, dispatch from foreign news agency extremely wire netting.
The present invention has a positive effect:
(1) electrodeless quasi-molecule lamp of the present invention uses dielectric barrier discharge excitation luminescence, uses discharge voltage and input work
The adjustable high voltage power supply of rate excites the low pressure mixed gas (rare gas, rare gas-halogen) between two-layered medium to discharge
Generation Excimer UV radiates.When carrying out exhaust gas decomposition, first vacuumize in IIth district, be subsequently filled the gas of certain pressure
(rare gas, rare gas-halogen), connects high voltage power supply, and the mixed gas in IIth district is excited generation Excimer UV light to I
The direction of district and III district's reaction zone radiates and makes exhaust gas decomposition.
The gas filled by changing IIth district can obtain the ultraviolet light (VUV VUV and UV) of different wave length, has pin
To property ground different gas of degrading, capacity usage ratio is high, exhaust-gas treatment is effective；And Excimer lamp wave-length coverage width (λ=
108-345nm), applied range, can be used for the improvement of multiple waste gas.Additionally, by the proportioning filling gas in changing IIth district
And stagnation pressure, thus it is possible to vary the luminous intensity of Excimer lamp and luminous efficiency, therefore can adjust gas according to the concrete condition of waste gas
The proportioning of body and stagnation pressure.
(2) assembly of the invention is simple and compact for structure, floor space is few；And owing to there is no electricity in quasi-molecule fluorescent tube used
Pole, in can avoiding lamp, gas contacts with metal electrode and makes the problem of ageing of electrode, and the repair and replacement number of times of fluorescent tube is few, the life-span
Long；In addition Excimer lamp is simple to manufacture, and the shape and size of lamp are any.
(3) electrodeless quasi-molecule lamp of assembly of the invention has three kinds of structural shapes, is electricity in external electrode wire netting respectively
Electrode metal net in electrode metal net and external electrode wire netting in pole sheet metal, external electrode sheet metal, outside corresponding respectively to
District's degraded, inner region degraded and interior outskirt degraded form.Above-mentioned three kinds of structural shapes require different gas inlet modes, by gas
Body distributor realizes.When using the degraded of outskirt that is I district, gas distributor uses the structural shape shown in Fig. 6, and interior electrode uses
Sheet metal, external electrode uses wire netting；Piston is opened, and waste gas fully enters Ith district by gas distributor and carries out ultraviolet radiation fall
Solve；When using the degraded of inner region that is III district, gas distributor uses the structural shape shown in Fig. 7, and interior electrode uses wire netting, outward
Electrode uses sheet metal；Piston is closed, and waste gas fully enters IIIth district by the porous plug of gas distributor and carries out ultraviolet radiation fall
Solve.When using I and III district to degrade simultaneously, gas distributor uses the structural shape shown in Fig. 1, and internal and external electrode all uses metal
Net；Piston is opened, and waste gas respectively enters Ith district and IIIth district by gas distributor and carries out ultraviolet radiation degradation.
(4) present invention is in order to improve exhaust gas decomposition effect, on the basis of Excimer lamp photodissociation, enters also by two ways
Row improves: one is to add catalyst composition photocatalytic degradation system at reaction zone, and Excimer UV light is combined light with catalyst and urged
Change degraded waste gas；Two is to offer bypass in adapter sleeve side, is passed through external adding water steam and dry clean air, waits to degrade in adapter sleeve
Waste gas is diluted being mixed to form the waste gas containing certain water vapor body fraction, together with gas mixer is after gas distributor mixing
Enter into photodissociation in reactor；Adscititious gases decomposes generation O and OH free radical, O and OH under the action of uv light
Free radical collides with emission molecule to be degraded and reacts, and improves the dissociation yield of target molecule, thus improves photolytic efficiency.
(5) when the present invention processes waste gas, from waste gas generator gas by lower gas skirt collect after, by gas mix
Clutch and the mixing of air inlet distributor two-stage realize shunting or the stable and uniform air inlet not shunted, it is ensured that treatment effect is stable.
Accompanying drawing explanation
Fig. 1 is the structural representation of the device of the electrodeless quasi-molecule lamp photocatalytic degradation waste gas of the present invention；
Fig. 2 is the schematic diagram of gas mixer in Fig. 1；
Fig. 3 is the A-A sectional view of Fig. 2；
Fig. 4 is the schematic diagram of the gas distributor in Fig. 1；
Fig. 5 is the schematic diagram of the porous sieve plate in Fig. 1；
Fig. 6 is that assembly of the invention only has I district's reaction zone to lead to the fundamental diagram when degraded gas；
Fig. 7 is that assembly of the invention only has III district's reaction zone to lead to the fundamental diagram when degraded gas；
Fig. 8 is the schematic diagram of the gas distributor in Fig. 6；
Fig. 9 be the device shown in Fig. 1 reaction zone in the schematic diagram of catalyst is set；
Mark in above-mentioned accompanying drawing is as follows:
Gas skirt 1, lower gas skirt 11, upper gas skirt 12；
Adapter sleeve 2, the first cylinder 21, flange 21-1, the second cylinder 22, air inlet 22-1, the 3rd cylinder 23, pressure
Ring 24；
Gas mixer 3, mixing unit 31, groove 31-1, installation portion 32；
Air inlet distributor 4, main body 41, through hole 42, upper hole section 42-1, lower opening section 42-2, erecting bed 42-3, cannelure 43,
Annular boss 44, I district's air inlet through hole 45, piston channel 46, piston 46-1, porous plug 47, blind hole 47-1, III district's air inlet through hole
47-2, blind hole plug 48, blind hole 48-1, porous sieve plate 49, passage 49-1；
Reactor 5, the first quartz ampoule 51, the second quartz ampoule 52, the 3rd quartz ampoule 53, gas fill area 54, bracing frame 55；
Giving vent to anger distributor 6, main body 61, Ith district goes out vent hole 62, and IIIth district goes out vent hole 63；
Interior electrode 71, external electrode 72, high voltage power supply 73.
Detailed description of the invention
(embodiment 1, the device of electrodeless quasi-molecule lamp photocatalytic degradation waste gas)
See Fig. 1, the device of the electrodeless quasi-molecule lamp photocatalytic degradation waste gas of the present embodiment include gas skirt 1, adapter sleeve 2,
Gas mixer 3, air inlet distributor 4, reactor 5, give vent to anger distributor 6 and air-introduced machine.Gas skirt 1 includes lower gas skirt 11 and upper
Gas skirt 12.Lower gas skirt 11, gas mixer 3, reactor 5, give vent to anger distributor 6 and upper gas skirt 12 sets the most successively
Put.
The air inlet of lower gas skirt 11 is connected with the waste gas generator gas outlet of gas to be degraded or air accumulator, lower gas collection
The gas outlet of cover 11 is connected with the air inlet of adapter sleeve 2 by flange.Gas mixer 3 is arranged on the inside of adapter sleeve 2, gas
The air inlet of blender 3 communicates with the internal cavities of adapter sleeve 2, the gas outlet of gas mixer 3 and the air inlet of air inlet distributor 4
End communicates.
Described adapter sleeve 2 includes the first cylinder the 21, second cylinder 22 and the 3rd cylinder of coaxial line from top to bottom
23, first cylinder the 21, second cylinder 22 and the 3rd cylinder 23 external diameter diminish successively.The periphery of the first cylinder 21 is arranged
The upper surface of one circle flange 21-1, flange 21-1 and the upper surface of the first cylinder 21 are at grade.From the first cylinder
The down-set circle annular concave platform of upper surface of 21.First cylinder 21 is connected by annular connecting plate with the second cylinder 22, the
An erecting bed is formed between one cylinder 21 and the second cylinder 22.The lower side of the second cylinder 22 offers air inlet 22-
1, air inlet 22-1 is connected with air inlet pipe, and air inlet pipe is provided with valve.Pass through between second cylinder 22 and the 3rd cylinder 23
Annular connecting plate is connected.
See that Fig. 2 and Fig. 3, described gas mixer 3 include mixing unit 31 and installation portion 32.Mixing unit 31 is lower end closed
Cylindrical shape, the cylindrical lateral portion of mixing unit 31 is slotted 31-1, groove 31-1 become 45 with the axis of mixing unit 310Oblique angle, gas from
The sidepiece of mixing unit 31 is sufficiently mixed after entering during rotating rising.
Gas mixer 3 is arranged on by installation portion 32 between first cylinder 21 and second cylinder 22 of adapter sleeve 2
On the erecting bed formed.
Between upper surface and the lower surface of air inlet distributor 4 of gas mixer 3, pressure ring 24 is set.Pressure ring 24 is cylinder
Shape, the lower surface of pressure ring 24 contacts with the upper surface of the installation portion 32 of gas mixer 3, and the upper surface of pressure ring 24 is divided with air inlet
The lower surface of orchestration 4 contacts.
See Fig. 4, air inlet distributor 4 include main body 41, through hole 42, cannelure 43, I district's air inlet through hole 45, piston channel 46,
Through hole stopper and porous sieve plate 49.
Main body 41 is cylindrical, and the central authorities of main body 41 are provided with through hole 42；Through hole 42 and main body 41 coaxial line.Through hole 42 is by upper
Hole section 42-1 and lower opening section 42-2 composition, the aperture of upper hole section 42-1 is more than the aperture of lower opening section 42-2, thus upper hole section 42-1
And form erecting bed 42-3 between lower opening section 42-2.
From the upper surface of main body 41 to having cannelure 43, cannelure 43 be arranged on through hole 42 periphery and with through hole 42
It is coaxially set.The bottom of cannelure 43 arranges annular boss 44, the inwall phase of the lateral surface of annular boss 44 and cannelure 43
Laminating.Annular boss 44 becomes the erecting bed in cannelure 43.
I district's air inlet through hole 45 is arranged on the periphery of through hole 42 and is positioned at the inner side of annular boss 44 of cannelure 43.Ith district
The axis of air inlet through hole 45 is parallel with the axis of main body 41 and completely through main body 41；The air outlet position of I district's air inlet through hole 45
In cannelure 43.
Piston channel 46 is along being radially arranged in main body 41, and each I district's air inlet through hole 45 is correspondingly arranged a piston
Passage 46, piston channel 46 is connected with I district's air inlet through hole 45.Piston 46-1 it is provided with in piston channel 46；When piston 46-1 by
Outside to inside during motion arrival inner side, I district's air inlet through hole 45 is blocked by piston 46-1；And when piston 46-1 moves out, Ith district
Air inlet through hole 45 recovers unimpeded.
I district's air inlet through hole 45 be provided above porous sieve plate 49.See that Fig. 5, described porous sieve plate 49 are annular, along porous
The circumferencial direction of sieve plate 49 arranges a circle passage 49-1.Porous sieve plate 49 is fixedly installed on the annular boss 44 in cannelure 43
Top.From the waste gas of I district's air inlet through hole 45 inflow by flowing into I district's reaction zone after the passage 49-1 of porous sieve plate 49.Useless
Gas is mixed when through porous sieve plate 49 further.
Described through hole plug attached bag includes porous plug 47 and blind hole plug 48 two kinds.Through hole stopper is placed on the erecting bed in through hole 42
The top of 42-3.Through hole stopper and the upper hole section 42-1 tight fit of through hole 42.
Still see that Fig. 4, the main body of described porous plug 47 are a cylinder, including blind hole 47-1 and III district's air inlet through hole 47-2.
Blind hole 47-1 is arranged on the center upper portion of porous plug 47.III district's air inlet through hole 47-2 is arranged on below blind hole 47-1 and the air inlet of IIIth district
The axis of through hole 47-2 is parallel with the axis of blind hole 47-1, and the gas outlet of III district's air inlet through hole 47-2 communicates with blind hole 47-1.
Seeing that Fig. 8, the main body of described blind hole plug 48 are a cylinder, the center upper portion of blind hole plug 48 arranges blind hole 48-1.
Reactor 5 is arranged on air inlet distributor 4 and gives vent to anger between distributor 6.
Seeing Fig. 1, distributor 6 of giving vent to anger includes main body 61, blind hole, cannelure, Ith district goes out vent hole 62 and IIIth district goes out vent hole
63。
Main body 61 is cylindrical, is upwards provided with blind hole, blind hole and main body 61 coaxial line from the bottom surface of main body 61.Give vent to anger point
The blind hole of the main body 61 of orchestration 6 is identical with the diameter of blind hole 47-1 of porous plug 47.IIIth district goes out vent hole 63 and is arranged on main body 61
Blind hole above, and to go out the axis of vent hole 63 parallel with the axis of blind hole in IIIth district.IIIth district goes out air inlet and the master of vent hole 63
The blind hole of body 61 communicates.
Upwards be additionally provided with cannelure from the bottom surface of main body 61, cannelure be positioned at blind hole periphery and with blind hole coaxial line.Ⅰ
District goes out vent hole 62 and is arranged on the upside of the ring groove of main body 61, and to go out the axis of vent hole 62 parallel with the axis of cannelure in Ith district.
The cannelure of air inlet and main body 61 that I district goes out vent hole 62 communicates.
Upper gas skirt 12 is fixed on the top of distributor 6 of giving vent to anger, the air inlet of upper gas skirt 12 and distributor 6 of giving vent to anger
All gas outlets be connected.The air inlet port of air-introduced machine (being not drawn in figure) is connected with the gas outlet of upper gas skirt 12.
Reactor 5 is arranged on air inlet distributor 4 and gives vent to anger between distributor 6, and reactor 5 is arranged on air inlet distributor 4
The top of porous sieve plate 49.
Reactor 5 includes three layers of quartz medium layer, interior electrode 71, external electrode 72 and high voltage power supply 73.
First quartz ampoule the 51, second stone that described three layers of quartz medium layer include coaxial line, that set gradually from inside to outside
English pipe 52 and the 3rd quartz ampoule 53.The transmitance of the ultraviolet light (near 200nm) of the first quartz ampoule 51 and the second quartz ampoule 52 reaches
More than 85%；3rd quartz ampoule 53 uses domestic quartz ampoule, transmitance ＜ 40% of its ultraviolet light (near 200nm), the 3rd quartz
The wall thickness of pipe 53 is 1～2mm.
The open at both ends of the first quartz ampoule 51, the lower end of the first quartz ampoule 51 is sleeved on the through hole stopper of air inlet distributor 4
Upper blind bore in, the upper end of the first quartz ampoule 51 is sleeved in the blind hole of distributor 6 of giving vent to anger, by the inside of the first quartz ampoule 51
Cavity is as III district's reaction zone.It is arranged as required to bracing frame 55(in III district's reaction zone and sees Fig. 9).
Second quartz ampoule 52 is sleeved on outside the first quartz ampoule 51, and the upper/lower terminal port of the second quartz ampoule 52 is sintered in
The lateral surface of one quartz ampoule 51, thus form airtight toroidal cavity i.e. gas between the second quartz ampoule 52 and the first quartz ampoule 51
Fill area 54, fills this airtight toroidal cavity with IIth district as gas.
The open at both ends of the 3rd quartz ampoule 53, the lower end of the 3rd quartz ampoule 53 is sleeved on the cannelure 43 of air inlet distributor 4
In, and supported by the annular boss 44 in cannelure 43.The upper end of the 3rd quartz ampoule 53 is sleeved on the cannelure of distributor 6 of giving vent to anger
In, the lateral surface of the 3rd quartz ampoule 53 contacts with the outside cell wall of the cannelure of distributor 6 of giving vent to anger.3rd quartz ampoule 53 and
I district's reaction zone is formed between two quartz ampoules 52.It is arranged as required to bracing frame 55(in I district's reaction zone and sees Fig. 9).
Air inlet distributor 4, three layers of quartz medium layer of reactor 5 and distributor 6 of giving vent to anger are coaxially set.
Interior electrode 71 is arranged on the inside of the first quartz ampoule 51, and interior electrode 71 is wire netting or sheet metal, when interior electrode 71
During for wire netting, wire netting is close to the inwall of the first quartz ampoule 51 and is arranged；When interior electrode 71 is sheet metal, the first quartz ampoule 51
Inwall be close to one layer of sheet metal rolled as interior electrode 71.
External electrode 72 is arranged on the lateral surface of the second quartz ampoule 52.Lamellar gold is wound on the lateral surface of the second quartz ampoule 52
Belong to as coated metal net on external electrode 72, or the lateral surface of the second quartz ampoule 52 as external electrode 72.External electrode 72 is with interior
Electrode 71 is coaxially set so that electric discharge is evenly.
External electrode 72, interior electrode 71 connect with high voltage power supply 73.Described high voltage power supply 73 is medium-frequency pulse square wave power, puts
Piezoelectric voltage is adjustable in the range of 0～15kV.Under high voltage power supply 73 excites, Excimer UV radiation direction I district's reaction zone and IIIth district
Reaction zone radiates, and flows through I district's reaction zone and the waste gas of III district's reaction zone or air solves under Excimer UV radiation effects
From.
When device uses blind hole plug 48, pending waste gas can enter the reaction zone degraded of Ith district.Now interior electrode
71 use sheet metal, and external electrode 72 uses wire netting, and the quasi-molecule light excited is completely used for, to the reaction zone radiation of Ith district, improving energy
Source efficiency.
When device uses porous plug 47, pending waste gas can only enter the reaction zone degraded of IIIth district, it is also possible to shunting
Enter Ith district and III district's reaction zone is degraded.When waste gas only enters the reaction zone degraded of IIIth district, preferably interior electrode uses metal
Net, external electrode uses sheet metal, and the quasi-molecule light excited is completely used for, to the reaction zone radiation of IIIth district, improving energy efficiency.When useless
When gas is further separated into Ith district and III district's reaction zone is degraded, internal and external electrode all uses wire netting.
So that apparatus structure is simple in the present embodiment, it is possible to be also not provided with gas mixer 3, by air inlet distributor 4
Air inlet directly gas outlet with adapter sleeve 2 be connected.But pending waste gas passes through gas mixer+gas distributor two
Level mixing, it is possible to achieve uniformly air inlet, it is ensured that treatment effect is more stable.
When the device of electrodeless quasi-molecule lamp photocatalytic degradation waste gas uses, first to the first quartz ampoule 51 and the second quartz ampoule
Gas between 52 is filled IIth district and is vacuumized, and is then charged with the rare gas selected according to gas to be degraded of certain pressure
(Xe2), rare gas-halogen (Ar/F2、 Kr/Cl2、 Kr/Br2、 Kr/I2、Xe/I2、Xe/C2、Kr/F2) mixed gas.
It addition, fill proportioning and the stagnation pressure of gas in filling IIth district by change gas, thus it is possible to vary high voltage power supply 73 is used
Distribute in the energy exciting excimer radiation, farthest improve exhaust gas decomposition effect and energy rate.
Opening air-introduced machine, air-introduced machine will be in waste gas suction reactor 5 be degraded, and waste gas to be degraded is through gas mixer 3
After mixing when air inlet distributor 4, it is further separated into I district's reaction zone and III district's reaction zone of reactor 5, or only enters Ith district
Reaction zone, or only enter III district's reaction zone, after the reaction of reacted device 5, gas mixes in upper gas skirt 12 again, then by
Discharge extracted out by air-introduced machine.
(embodiment 2, the method for electrodeless quasi-molecule lamp photocatalytic degradation waste gas)
The method of the electrodeless quasi-molecule lamp photocatalytic degradation waste gas of the present embodiment uses the device described in embodiment 1, air inlet
Through hole stopper used by distributor 4 is blind hole plug 48.Interior electrode 71 uses sheet metal, external electrode 72 to use wire netting.
The flow process of electrodeless quasi-molecule lamp photocatalytic degradation waste gas is: waste gas generator or waste gas air accumulator waste gas warp out
Cross gas mixer 3 tentatively to mix, then after air inlet distributor 4 mixes further, enter anti-under air-introduced machine effect
Purify in answering device 5.In the place of the outlet distance reactor 1m of reactor 5, arranging thief hatch, reacted gas passes through
On-line gas analysis instrument detects its concentration, degrade up to standard after gas discharged by blast pipe.
Seeing Fig. 6, the present embodiment degraded flowable state simulation dimethylamine exhaust gas, initial concentration is 3745 mg/m3, waste gas of degrading
Method specifically include following steps:
1. gas fill IIth district vacuumize, fill Kr: Cl the most wherein2=350:1, stagnation pressure 205torr.
2. opening high voltage power supply 73, applied voltage 7.2kV, power 78W, gas is filled the mixed gas in IIth district and is excited product
The radiation of raw Excimer UV Guang Xiang I district, Excimer UV radiation wavelength is 222nm.The piston 46-1 opening air inlet distributor 4 makes
Obtain I district's air inlet through hole 45 unimpeded.
3. opening the air-introduced machine being connected with upper gas skirt 12, dimethylamine exhaust gas flows out from waste gas generator gas outlet, passes through
After gas mixer 3 and air inlet distributor 4 mixing, enter reactor I district and carry out photolysis.The flow of dimethylamine exhaust gas is
14.9 m3/h。
4. on-line gas analysis instrument detection display dimethylamine gas removal efficiency when applied voltage 7.2kV reaches 64.5%,
Energy rate is 461.4 g/ (kW.h)).
In order to improve photolysis efficiency, steam and dry clean air can be passed through in the air inlet 22-1 of adapter sleeve 22, will be useless
Gas dilution mixture becomes the waste gas containing certain water vapor body fraction, enters into photodissociation in reactor together, and aqueous vapor is at the work of ultraviolet light
Under with, resolve into O and OH free radical, improve photolytic efficiency.
(embodiment 3, the method for electrodeless quasi-molecule lamp photocatalytic degradation waste gas)
The method of the electrodeless quasi-molecule lamp photocatalytic degradation waste gas of the present embodiment uses the device described in embodiment 1, air inlet
Through hole stopper used by distributor 4 is porous plug 47.Interior electrode 71 uses wire netting, external electrode 72 to use sheet metal.
Seeing Fig. 7, the present embodiment degraded flowable state simulation dimethylamine exhaust gas, initial concentration is 3745 mg/m3, waste gas of degrading
Method specifically include following steps:
1. gas fill IIth district vacuumize, fill Kr: Cl the most wherein2=350:1, stagnation pressure 205torr.
2. opening high voltage power supply 73, applied voltage 6kV, power 50W, gas is filled the mixed gas in IIth district and is excited generation
The reaction zone radiation of Excimer UV Guang Xiang III district, Excimer UV radiation wavelength is 222nm.Close the piston of air inlet distributor 4
46-1 makes I district's air inlet through hole 45 close, and gas can only enter III district's reaction zone by porous plug 47.
3. opening the air-introduced machine being connected with upper gas skirt 12, dimethylamine exhaust gas flows out from waste gas generator gas outlet, passes through
After gas mixer 3 and air inlet distributor 4 mixing, enter reactor III district reaction zone and carry out photolysis.Dimethylamine exhaust gas
Flow is 26.3 m3/h。
4. on-line gas analysis instrument detection display dimethylamine gas photolysis efficiency when applied voltage 6kV is 48.6%.
(embodiment 4, the method for electrodeless quasi-molecule lamp photocatalytic degradation waste gas)
The through hole stopper used by air inlet distributor 4 of the device used by the present embodiment is porous plug 47, and interior electrode 71 is adopted
With wire netting, external electrode 72 uses wire netting.
Seeing Fig. 1, remaining is same as in Example 3, no for the method for the electrodeless quasi-molecule lamp photocatalytic degradation waste gas of the present embodiment
It is with part:
1. gas is filled IIth district and is vacuumized by step, fills Kr: Br the most wherein2=350: 1, stagnation pressure 150torr.
Step 2. gas is filled the mixed gas in IIth district and is excited generation Excimer UV Guang Xiang I district and III district's reaction zone spoke
Penetrating, Excimer UV radiation wavelength is 207nm.The piston 46-1 opening air inlet distributor 4 makes I district's air inlet through hole 45 unimpeded,
Gas distribution enters I district's reactor and III district's reaction zone reacts.
Step 4. on-line gas analysis instrument detection display dimethylamine gas photolysis efficiency when applied voltage 6kV is
35.4%。
(embodiment 5, the method for electrodeless quasi-molecule lamp photocatalytic degradation waste gas)
The method of the present embodiment electrodeless quasi-molecule lamp photocatalytic degradation waste gas uses the device described in embodiment 1, and air inlet divides
Through hole stopper used by orchestration 4 is porous plug 47.Interior electrode 71 uses wire netting, external electrode 72 to use wire netting.
Seeing Fig. 1, the present embodiment degraded flowable state simulation monomethyl amine waste gas, initial concentration is 2010 mg/m3, waste gas of degrading
Method specifically include following steps:
1. gas fill IIth district vacuumize, fill Kr: I the most wherein2=350:1, stagnation pressure 300torr.
2. opening high voltage power supply 73, applied voltage 7.2kV, power 78W, gas is filled the mixed gas in IIth district and is excited product
Raw Excimer UV Guang Xiang I district and the reaction zone radiation of IIIth district, Excimer UV radiation wavelength is 206nm.Open air inlet distributor 4
Piston 46-1 make I district's air inlet through hole 45 unimpeded, gas distribution enters I district's reactor and III district's reaction zone reacts.
3. opening the air-introduced machine being connected with upper gas skirt 12, monomethyl amine waste gas flows out from waste gas generator gas outlet, passes through
After gas mixer 3 and air inlet distributor 4 mixing, enter reactor I district and III district's reaction zone carries out photolysis.Monomethyl amine gives up
The flow of gas is 26.3 m3/h。
4. on-line gas analysis instrument detection display dimethylamine gas photolysis efficiency when applied voltage 7.2kV is 89.5%.
(embodiment 6, the method for electrodeless quasi-molecule lamp photocatalytic degradation waste gas)
The method of the present embodiment electrodeless quasi-molecule lamp photocatalytic degradation waste gas uses the device described in embodiment 1, and air inlet divides
Through hole stopper used by orchestration 4 is porous plug 47.Interior electrode 71 uses wire netting, external electrode 72 to use wire netting.
Seeing Fig. 1, the present embodiment degraded flowable state simulation toluene waste gas, initial concentration is 1500 mg/m3, degraded waste gas
Method specifically includes following steps:
1. gas fill IIth district vacuumize, fill Kr: I the most wherein2=350:1, stagnation pressure 300torr.
2. opening high voltage power supply 73, applied voltage 7.2kV, power 78W, gas is filled the mixed gas in IIth district and is excited product
Raw Excimer UV Guang Xiang I district and the reaction zone radiation of IIIth district, Excimer UV radiation wavelength is 206nm.Open air inlet distributor 4
Piston 46-1 make I district's air inlet through hole 45 unimpeded, gas distribution enters I district's reactor and III district's reaction zone reacts.
3. opening the air-introduced machine being connected with upper gas skirt 12, toluene waste gas flows out from waste gas generator gas outlet, Jing Guoqi
After body blender 3 and air inlet distributor 4 mixing, enter reactor I district and III district's reaction zone carries out photolysis.Toluene waste gas
Flow is 26.3 m3/h。
4. on-line gas analysis instrument detection display toluene gas photolysis efficiency when applied voltage 7.2kV is 70.5%.
(embodiment 7, the method for electrodeless quasi-molecule lamp photocatalytic degradation waste gas)
Seeing Fig. 9, the method for the present embodiment electrodeless quasi-molecule lamp photocatalytic degradation waste gas uses the device described in embodiment 1,
Through hole stopper used by air inlet distributor 4 is porous plug 47.Interior electrode 71 uses wire netting, external electrode 72 to use wire netting.Ith district
Bracing frame 55, I district's reaction zone and III district reaction zone catalyst filling TiO are set in reaction zone and III district's reaction zone2。
The method of the present embodiment electrodeless quasi-molecule lamp photocatalytic degradation waste gas is same as in Example 6, due to depositing of catalyst
, on-line gas analysis instrument detection display toluene gas photolysis efficiency when applied voltage 7.2kV is 92.3.
Claims (3)
1. the method for an electrodeless quasi-molecule lamp photocatalytic degradation waste gas, it is characterised in that: reactor used (5) include three layers of stone
English dielectric layer, interior electrode (71), external electrode (72) and high voltage power supply (73)；
First quartz ampoule (51) that described three layers of quartz medium layer include coaxial line, that set gradually from inside to outside, the second quartz
Pipe (52) and the 3rd quartz ampoule (53)；Interior electrode (71) is arranged on the inside of the first quartz ampoule (51), and external electrode (72) is arranged on
On the lateral surface of the second quartz ampoule (52)；
The open at both ends of the first quartz ampoule (51), the internal cavities of the first quartz ampoule (51) is III district's reaction zone；Second quartz ampoule
(52) being sleeved on the first quartz ampoule (51) outward, the upper/lower terminal port of the second quartz ampoule (52) is sintered in the first quartz ampoule (51)
Lateral surface, thus form airtight toroidal cavity between the second quartz ampoule (52) and the first quartz ampoule (51), fill out as gas
Fill IIth district；The open at both ends of the 3rd quartz ampoule (53), forms Ith district between the 3rd quartz ampoule (53) and the second quartz ampoule (52) and reacts
District；
During photocatalytic degradation waste gas, gas is filled after IIth district vacuumizes, and fills IIth district to gas and is filled with rare gas or rare
Gas-halogen mixed gas；After connecting high voltage power supply (73), gas is filled the gas in IIth district and is excited generation Excimer UV
Light, radiates to the direction of I district's reaction zone and III district's reaction zone；
From waste gas generator or waste gas air accumulator flow out wait the waste gas degraded and steam and do after clean air mixes, process
Gas mixer (3) tentatively mixes, then enters I district's reaction zone or III district's reaction zone after air inlet distributor (4) porous shunts
Degrade；Waste gas to be degraded all through I district's reaction zone, is degraded under Excimer UV radiation effects；Or wait to drop
The waste gas solved, all through III district's reaction zone, is degraded under Excimer UV radiation effects；Or waste gas shunting to be degraded
Enter I district's reaction zone and III district's reaction zone, be degraded under Excimer UV radiation effects；Gas is from I district's reaction zone or IIIth district
After reaction zone flows out, air-introduced machine extract discharge out.
The method of electrodeless quasi-molecule lamp photocatalytic degradation waste gas the most according to claim 1, it is characterised in that: gas is filled
The rare gas that IIth district is filled with is Xe；Rare gas-the halogen mixture gas being filled with is Ar/F2、 Kr/Cl2、 Kr/Br2、 Kr/
I2、Xe/I2、Xe/Cl2、Kr/F2；Wavelength X=108 of the quasi-molecule light that reactor (5) radiates～345nm.
The method of electrodeless quasi-molecule lamp photocatalytic degradation waste gas the most according to claim 1, it is characterised in that: described high pressure
Power supply (73) is medium-frequency pulse square wave power, and discharge voltage is adjustable in the range of 0kV～15kV.
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| CN201310089087.XA CN103182245B (en) | 2013-03-20 | 2013-03-20 | Device and method for photocatalytic degradation of waste gas by electrodeless excimer lamp |
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| DE19744940A1 (en) * | 1997-02-28 | 1998-09-03 | Umex Ges Fuer Umweltberatung U | Laboratory equipment for photochemical reaction, prior to analysis |
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Effective date of registration: 20220721 Address after: 213000 Hutang Zhengou South Industrial Concentration Zone, Wujin District, Changzhou City, Jiangsu Province Patentee after: Changzhou Mingrui environmental testing Co.,Ltd. Address before: 213001, No. 1801, Wu Cheng Road, bell tower, Changzhou, Jiangsu Patentee before: JIANGSU University OF TECHNOLOGY |