CN105536525A - Photoinduction catalytic oxidation exhaust purification process and device - Google Patents
Photoinduction catalytic oxidation exhaust purification process and device Download PDFInfo
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- CN105536525A CN105536525A CN201610100314.8A CN201610100314A CN105536525A CN 105536525 A CN105536525 A CN 105536525A CN 201610100314 A CN201610100314 A CN 201610100314A CN 105536525 A CN105536525 A CN 105536525A
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- external box
- microvave
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- circulating water
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8678—Removing components of undefined structure
- B01D53/8687—Organic components
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/38—Removing components of undefined structure
- B01D53/44—Organic components
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/76—Gas phase processes, e.g. by using aerosols
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0258—Other waste gases from painting equipments or paint drying installations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/12—Methods and means for introducing reactants
- B01D2259/122—Gaseous reactants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/12—Methods and means for introducing reactants
- B01D2259/124—Liquid reactants
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- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Physical Water Treatments (AREA)
Abstract
The invention provides a photoinduction catalytic oxidation exhaust purification process and device. The device comprises an external box and a circulating water tank arranged at the bottom end of the external box, wherein a circulating pump is arranged inside the circulating water tank and communicated with a high-pressure spray nozzle inside the external box through a sprinkling pipeline; a photolysis cavity is formed in the external box, and a demisting device is arranged inside the photolysis cavity; an equipment outlet is formed in the top end of the external box, and an equipment inlet is formed in the side wall of the external box; a guiding device is arranged at the top end of the equipment inlet, and a sleeve type ultraviolet lamp is arranged at the top end of the guiding device; an observation port is formed in the side wall of the external box; a pH meter is connected to one side of the circulating water tank, and a liquid supplement port is formed in one side of the pH meter; a liquid storage tank is arranged at one side of the circulating water tank, and the top end of the liquid storage tank is communicated with the circulating water tank through a metering pump. By the adoption of the photoinduction catalytic oxidation exhaust purification process and device, exhaust treatment is quick and efficient, operation is easy, and the purification effect is good.
Description
Technical field
The present invention relates to a kind of waste gas purification technique and device, be specially waste gas purification technique and the device of the oxidation of a kind of Photocatalysis, belong to waste gas purification treatment technology application.
Background technology
In recent years along with expanding economy, various chemical industry, coating, furniture, toy, electronics, a large amount of generations of the enterprises such as spraying, result in the discharge of a large amount of industrial organic exhaust gas, cause smell pollution, have a strong impact on atmosphere quality, be detrimental to health, to the improvement of organic exhaust gas, except pyrolysismethod, activated carbon method, condensation method, spray-absorption method, biomembrance process, outside plasma method, direct photolysis method, photocatalytic method, chemical oxidization method because of equipment simple, cost is low, the advantage such as easy to use, in recent years, photocatalysis oxidation technique and chemical oxidization method are in spraying, chemical industry, the fields such as foul waste gas are widely applied.Photocatalysis technology principle is:
the direct effect of ultraviolet light wave: the high energy light wave first being produced specific band by ultraviolet lamp tube, produce wavelength mainly 253.7nm and 185nm of light wave, the contaminated thing molecule absorption of light wave of specific wavelength, thus progressively interrupt molecular link, pollutant is degraded, simultaneously O
2also can absorb light wave and generate O
3, oxidation Decomposition polluter;
the catalytic action of catalyst: when the illumination of certain energy is mapped to semiconductor, valence-band electrons is stimulated and transition becomes light induced electron, leave is not the energy state of electrons occupy, i.e. photohole, electrons pair is formed with the electronics being energized into conduction band, they are moveable to the surface of semiconductor particle, generate the high mars free radical with oxidability, the degradation of reactant in accelerated reaction system.Chemical oxidization method know-why is: utilize chemical oxidizing agent as the strong oxidation of the oxidants such as hydrogen peroxide, clorox, ozone, oxidant is imported reaction unit, and contacts with the pollutant in waste gas oxidation reaction occurs.
But in practical engineering application, direct photolysis, photocatalysis technology and chemical oxidization method are unsatisfactory to industrial waste gas purification effect, and for light technology, its reason is mainly:
(1) electricity conversion is low, because the light source great majority adopted at present are low pressure mercury lamps, in the ultraviolet light of radiation, the wavelength of Direct Resolution effect is had to be that 185nm(energy is about 6.9eV to pollutant), although 253.7nm photon energy (energy is about 5.7eV) is greater than most compounds bond energy, but do not absorb 253.7nm light due to a lot of material or absorb very weak, therefore, the actual light worked is 185nm light.But for low pressure mercury lamp, 185nm light relative radiant intensity is extremely low, under limited mercury lamp installation amount, be difficult to meet waste gas purification requirement, low to pollutant treatment effeciency, to reach desirable treatment effeciency, theoretical installation amount is huge;
(2) utilization rate of ultraviolet light is low, because the moisture in waste gas, oxygen etc. also can absorb 185nm light, thus causes 185nm light in the transmission distance of reaction zone and small, only obtains Direct Resolution effect at the pollutant on the surface pressing close to lamp.Although moisture and oxygen can produce oxygen atom, ozone, hydroxyl radical free radical etc. under 185nm photodissociation, but these active groups are when reacting with pollutant, be controlled by the factor such as collision probability, reaction rate, this indirect oxidation reaction is limited to the contribution of waste gas purification effect.
(3) much wideer than 185nm of 253.7nm light relative radiant intensity, for improving the utilization ratio to 253.7nm light, light-catalyzed reaction is also applied, used catalyst mostly is solid state, but the clean-up effect of this reaction unit is controlled by the speed of Pollutants Diffusion to catalyst surface, and, only have the region of illumination just can have an effect, therefore, the waste gas purification that is applied to of photocatalysis technology is also under suspicion always.
(4) in addition, dust, steam or other polluters easily accumulate in catalyst surface, cause catalysqt deactivation to lose efficacy;
(5) in course of reaction, easily produce excessive ozone, be difficult to reaction removing in the short time, gas outlet ozone concentration is exceeded standard sometimes.
For chemical oxidization method, the undesirable reason of clean-up effect is:
(1) impact of solution-air or gas-gas mass transfer Difficult factors is controlled by, chemical oxidizing agent and pollutant contact probability is low reduces chemical reaction rate.For improving mass-transfer efficiency, the spraying intensity of filling contact filler or raising aqueous chemical oxidant in purifying column, thus cause band liquid problem.
(2) for improving the oxidizing potential of oxidant, often needing to add acid solution, reducing pH value, thus add the control problem of equipment corrosion and administration system.
(3) as can be seen here, all there is certain defect about treatment technology or chemical oxidization method to the improvement of organic exhaust gas in existing light, provides the exhaust gas purification and treatment device of a kind of good purification, highly effective for avoiding weak point of the prior art to need badly.
Summary of the invention
The technical problem to be solved in the present invention overcomes existing defect, the waste gas purification technique providing a kind of Photocatalysis to be oxidized and device.
In order to solve the problems of the technologies described above, the invention provides following technical scheme:
The invention provides waste gas purification technique and the device of the oxidation of a kind of Photocatalysis, comprise external box of microvave and be arranged on the circulating water chennel of described external box of microvave bottom, described circulating water chennel inside arranges circulating pump, and described circulating pump is communicated with the high pressure nozzle being arranged on described external box of microvave inside by spray pipeline; Described external box of microvave inside arranges photodissociation cavity, and described photodissociation inside cavity arranges demister; Described external box of microvave top arranges equipment outlet, and described external box of microvave sidewall arranges equipment entrance; Described equipment entrance top arranges guiding device, and described guiding device top arranges bushing type ultraviolet lamp; Described external box of microvave sidewall offers observation panel; Described circulating water chennel side connects pH meter, and described pH meter side arranges fluid infusion mouth; Described circulating water chennel side arranges fluid reservoir, and described fluid reservoir top is communicated with described circulating water chennel by measuring pump.
As a preferred technical solution of the present invention, also comprise quartz socket tube, ultraviolet lamp tube and casing joint, described bushing type ultraviolet lamp inside suit quartz socket tube, and described quartz socket tube inside arranges ultraviolet lamp tube; Described quartz socket tube one end arranges casing joint.
As a preferred technical solution of the present invention, described guiding device is provided with the metallic plate of several equally distributed apertures.
As a preferred technical solution of the present invention, the partial sidewall that described spray pipeline is positioned at described external box of microvave inside is provided with several equally distributed described high pressure nozzles.
As a preferred technical solution of the present invention, described photodissociation inside cavity is provided with several equally distributed described bushing type ultraviolet lamps.
The beneficial effect that the present invention reaches is:
1, greatly improve the utilization ratio of light wave, take full advantage of 253.7nm light, realize photoinduction Quick Oxidation, oxidant direct oxidation, ultraviolet light direct photolysis synergy;
2, insert in ultraviolet lamp tube in quartz socket tube, avoid fluorescent tube directly to contact with pollutant, make that lamp luminescence is stable, long service life, luminous efficiency are higher, the carrying out of oxidation reaction is accelerated by light wave induced chemical oxidant, not only efficient-decomposition organic pollution, and ozone free secondary pollution, have process waste gas rapidly and efficiently, the advantage such as simple to operate and good purification.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for description, together with embodiments of the present invention for explaining the present invention, is not construed as limiting the invention.
In the accompanying drawings:
Fig. 1 is overall structure schematic diagram of the present invention;
Fig. 2 is ultraviolet lamp tube internal structure schematic diagram of the present invention;
Number in the figure: 1, external box of microvave; 2, equipment entrance; 3, guiding device; 4, observation panel; 5, bushing type ultraviolet lamp; 6, high pressure nozzle; 7, photodissociation cavity; 8, demister; 9, equipment outlet; 10, spray pipeline; 11, circulating pump; 12, pH meter; 13, measuring pump; 14, fluid reservoir; 15, fluid infusion mouth; 16, circulating water chennel; 17, quartz socket tube; 18, ultraviolet lamp tube; 19, casing joint.
Detailed description of the invention
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.
Embodiment: as shown in Figure 1-2, the invention provides waste gas purification technique and the device of the oxidation of a kind of Photocatalysis, comprise external box of microvave 1 and be arranged on the circulating water chennel 16 of described external box of microvave 1 bottom, described circulating water chennel 16 inside arranges circulating pump 11, and described circulating pump 11 is communicated with the high pressure nozzle 6 being arranged on described external box of microvave 1 inside by spray pipeline 10; Described external box of microvave 1 inside arranges photodissociation cavity 7, and described photodissociation cavity 7 inside arranges demister 8; Described external box of microvave 1 top arranges equipment outlet 9, and described external box of microvave 1 sidewall arranges equipment entrance 2; Described equipment entrance 2 top arranges guiding device 3, and described guiding device 3 top arranges bushing type ultraviolet lamp 5; Described external box of microvave 1 sidewall offers observation panel 4; Described circulating water chennel 16 side connects pH meter 12, and described pH meter 12 side arranges fluid infusion mouth 15; Described circulating water chennel 16 side arranges fluid reservoir 14, and described fluid reservoir 14 top is communicated with described circulating water chennel 16 by measuring pump 13.
Also comprise quartz socket tube 17, ultraviolet lamp tube 18 and casing joint 19, described bushing type ultraviolet lamp 5 inside suit quartz socket tube 17, and described quartz socket tube 17 inside arranges ultraviolet lamp tube 18; Described quartz socket tube 17 one end arranges casing joint 19.
Described guiding device 3 is provided with the metallic plate of several equally distributed apertures.
The partial sidewall that described spray pipeline 10 is positioned at external box of microvave 1 inside is provided with several equally distributed high pressure nozzles 6.Make inner spraying more even.
Described photodissociation cavity 7 inside is provided with several equally distributed bushing type ultraviolet lamps 5, makes inner light more even.
The present invention in use, external box of microvave 1 is provided with equipment entrance 2, equipment outlet 9 and observation panel 4, after waste gas enters from equipment entrance 2, after guiding device 3, make waste gas enter photodissociation cavity 7 uniformly react, the bushing type ultraviolet lamp 5 that ultraviolet photolysis device comprises photodissociation cavity 7 and is installed in photodissociation cavity 7, bushing type ultraviolet lamp 5 region is photodissociation cavity 7, waste gas after guiding device 3 even distributing wind enters this region, the decomposition reaction of expert's waste gas is entered in this region, chemical oxidizing agent spray equipment comprises high pressure nozzle 6, spray pipeline 10, circulating pump 11, fluid infusion mouth 15 and circulating water chennel 16, the chemical oxidizing agent that in circulating water chennel 16, storage configures in proportion, high pressure nozzle 6 place is promoted to by spray pipeline 10 with circulating pump 11, vaporific chemical oxidizing agent is sprayed through high pressure nozzle 6 at photodissociation cavity 7, act synergistically at this region ultraviolet light wave and chemical oxidizing agent, haptoreaction abundant with the pollutant in waste gas, when the liquid level in circulating water chennel 16 is lower than a threshold value, namely fluid infusion mouth 15 opens automatic liquid supply, the outlet of photodissociation cavity 7 connects with demister 8.
Automatic medicament feeding system comprises measuring pump 13 and fluid reservoir 14, chemical oxidizing agent is stored in fluid reservoir 14, the pH of circulating water chennel 16 is measured by pH meter 12, according to the value recorded, system is automatically opened or is stopped measuring pump 13, chemical oxidizing agent is added to circulating water chennel 16, demister 8 connects with the outlet of photodissociation cavity 7, waste gas is after photodissociation cavity 7 fully haptoreaction, because wind speed comparatively fast brings partially liq into, therefore removed the drop carried by demister 8 after, waste gas is discharged through equipment outlet 9, waste gas is after above-mentioned wet method photocatalysis oxidation reaction process, non-pollution discharge, first, waste gas enters photodissociation purifying area by equipment entrance 2, photodissociation purifying area is provided with the quartz socket tube 17 of the high ultraviolet thoroughly of many rows, inserts ultraviolet lamp, the UV light permeability quartz socket tube 17 that ultraviolet lamp is launched in pipe, forms High-energy photon lasing region in photodissociation purifying area inside, by high efficiency nozzle, chemical oxidizing agent is atomized simultaneously, utilizes oxidant to the abundant absorption of 253.7nm light, make oxidant be converted into the strong oxidizing property groups such as hydroxyl radical free radical, realize photoinduction Quick Oxidation, organic contamination molecule also directly can absorb 185nm photon or direct and oxidant reaction, realizes photoinduction Quick Oxidation, oxidant direct oxidation, ultraviolet light direct photolysis synergy.Under the synergy of high energy ultraviolet light wave and strong oxidative free radical, the series reaction such as organic pollution absorbs rapidly, cracking, catalytic oxidation, pollutant is degraded gradually and is transformed into the pollution-free compound of low molecule, as CO2, H2O etc., discharge subsequently after the demist layer mist elimination in equipment.
For avoiding the 185nm light of uviol lamp radiation by the aqueous vapor in quartz socket tube 17 and oxygen absorption, this height thoroughly ultraviolet quartz socket tube 17 is one end sealing, other end closed processes, and in quartz socket tube 17 filling nitrogen, nitrogen is utilized not absorb the characteristic of 185nm light and 253.7nm light, thus ensure that ultraviolet light that ultraviolet lamp gives off is not by attenuation of air, enters photodissociation purifying area through quartz socket tube 17 wall.
Last it is noted that the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment to invention has been detailed description, for a person skilled in the art, it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. the waste gas purification technique of Photocatalysis oxidation and device, comprise external box of microvave (1) and be arranged on the circulating water chennel (16) of described external box of microvave (1) bottom, it is characterized in that: described circulating water chennel (16) inside arranges circulating pump (11), and described circulating pump (11) is communicated with by the high pressure nozzle (6) that spray pipeline (10) is inner with being arranged on described external box of microvave (1); Described external box of microvave (1) inside arranges photodissociation cavity (7), and described photodissociation cavity (7) inside arranges demister (8); Described external box of microvave (1) top arranges equipment outlet (9), and described external box of microvave (1) sidewall arranges equipment entrance (2); Described equipment entrance (2) top arranges guiding device (3), and described guiding device (3) top arranges bushing type ultraviolet lamp (5); Described external box of microvave (1) sidewall offers observation panel (4); Described circulating water chennel (16) side connects pH meter (12), and described pH meter (12) side arranges fluid infusion mouth (15); Described circulating water chennel (16) side arranges fluid reservoir (14), and described fluid reservoir (14) top is communicated with described circulating water chennel (16) by measuring pump (13).
2. the waste gas purification technique of a kind of Photocatalysis oxidation according to claim 1 and device, it is characterized in that, also comprise quartz socket tube (17), ultraviolet lamp tube (18) and casing joint (19), described bushing type ultraviolet lamp (5) inside suit quartz socket tube (17), and described quartz socket tube (17) inside arranges ultraviolet lamp tube (18); Described quartz socket tube (17) one end arranges casing joint (19).
3. the waste gas purification technique of a kind of Photocatalysis oxidation according to claim 1 and device, it is characterized in that, described guiding device (3) is provided with the metallic plate of several equally distributed apertures.
4. the waste gas purification technique of a kind of Photocatalysis oxidation according to claim 1 and device, it is characterized in that, the partial sidewall that described spray pipeline (10) is positioned at described external box of microvave (1) inner is provided with several equally distributed described high pressure nozzles (6).
5. the waste gas purification technique of a kind of Photocatalysis oxidation according to claim 1 and device, it is characterized in that, described photodissociation cavity (7) inside is provided with several equally distributed described bushing type ultraviolet lamps (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610100314.8A CN105536525A (en) | 2016-02-24 | 2016-02-24 | Photoinduction catalytic oxidation exhaust purification process and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610100314.8A CN105536525A (en) | 2016-02-24 | 2016-02-24 | Photoinduction catalytic oxidation exhaust purification process and device |
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| Publication Number | Publication Date |
|---|---|
| CN105536525A true CN105536525A (en) | 2016-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610100314.8A Pending CN105536525A (en) | 2016-02-24 | 2016-02-24 | Photoinduction catalytic oxidation exhaust purification process and device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107243230A (en) * | 2017-07-21 | 2017-10-13 | 商志民 | A kind of processing unit of organic exhaust gas |
| CN108310948A (en) * | 2018-03-14 | 2018-07-24 | 常州大学 | The absorption plant and absorption process of acetone contained by a kind of exhaust gas |
| CN109012105A (en) * | 2018-07-10 | 2018-12-18 | 烟台南山学院 | Circulating waste gas treatment equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202105575U (en) * | 2011-04-02 | 2012-01-11 | 凯天环保科技股份有限公司 | Wet type waste gas comprehensive control apparatus |
| CN202265432U (en) * | 2011-09-15 | 2012-06-06 | 南通海景船舶压载水处理系统股份有限公司 | Seal structure of UV reactor |
| CN205550035U (en) * | 2016-02-24 | 2016-09-07 | 常州大恒环保科技有限公司 | Photoinduction catalytic oxidation's exhaust purification technology and device |
-
2016
- 2016-02-24 CN CN201610100314.8A patent/CN105536525A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202105575U (en) * | 2011-04-02 | 2012-01-11 | 凯天环保科技股份有限公司 | Wet type waste gas comprehensive control apparatus |
| CN202265432U (en) * | 2011-09-15 | 2012-06-06 | 南通海景船舶压载水处理系统股份有限公司 | Seal structure of UV reactor |
| CN205550035U (en) * | 2016-02-24 | 2016-09-07 | 常州大恒环保科技有限公司 | Photoinduction catalytic oxidation's exhaust purification technology and device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107243230A (en) * | 2017-07-21 | 2017-10-13 | 商志民 | A kind of processing unit of organic exhaust gas |
| CN108310948A (en) * | 2018-03-14 | 2018-07-24 | 常州大学 | The absorption plant and absorption process of acetone contained by a kind of exhaust gas |
| CN109012105A (en) * | 2018-07-10 | 2018-12-18 | 烟台南山学院 | Circulating waste gas treatment equipment |
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